WO2006011201A1 - Thermal crystallization system of saturated polyester hollow body and its heating method - Google Patents

Thermal crystallization system of saturated polyester hollow body and its heating method Download PDF

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Publication number
WO2006011201A1
WO2006011201A1 PCT/JP2004/010709 JP2004010709W WO2006011201A1 WO 2006011201 A1 WO2006011201 A1 WO 2006011201A1 JP 2004010709 W JP2004010709 W JP 2004010709W WO 2006011201 A1 WO2006011201 A1 WO 2006011201A1
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WO
WIPO (PCT)
Prior art keywords
heating
hollow body
mouth
light
neck
Prior art date
Application number
PCT/JP2004/010709
Other languages
French (fr)
Japanese (ja)
Inventor
Yuki Washizaki
Satoru Nemoto
Masahiro Ishikawa
Original Assignee
Toyo Seikan Kaisha, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Seikan Kaisha, Ltd. filed Critical Toyo Seikan Kaisha, Ltd.
Priority to JP2006527734A priority Critical patent/JP4577311B2/en
Priority to CN2004800435296A priority patent/CN1984766B/en
Priority to PCT/JP2004/010709 priority patent/WO2006011201A1/en
Publication of WO2006011201A1 publication Critical patent/WO2006011201A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • B29B13/025—Tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/0063—After-treatment of articles without altering their shape; Apparatus therefor for changing crystallisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/258—Tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0041—Crystalline

Definitions

  • the present invention relates to a heated crystallization apparatus for a saturated polyester hollow body and a heating method therefor, and more specifically, a bottomed preform made of a saturated polyester such as polyethylene terephthalate or a cap such as a bottle or cup.
  • the present invention relates to a heating and crystallization apparatus for a saturated polyester hollow body that heats and crystallizes the mouth and neck to be heated and a heating method thereof.
  • a bottle made of a saturated polyester is usually produced by biaxially stretching blow-molding an amorphous bottomed preform formed by injection molding or the like, leaving a portion that should become the mouth and neck. .
  • This type of bottle has molecular orientation at the shoulder, body and bottom, and has excellent container properties such as transparency, gas barrier integrity, strength, and impact resistance. Furthermore, these shoulder, body and bottom Bottles that have been heat set have the advantage that these parts are less likely to deform due to shrinkage when hot filled.
  • Patent Document 1 a technique for improving the hardness and heat resistance of the mouth and neck by heating and crystallizing the mouth or neck of the preform or container has been proposed.
  • Patent Document 2 It has been proposed that after heating at a low temperature in one step, the heating temperature is subsequently increased to cause heating and crystallization (Patent Document 2).
  • the conventional heater unit includes a near-infrared heater having a ceramic coating on the half surface on the counter-irradiation side and a reflector.
  • This near-infrared heater is provided at two locations in the vertical direction, approximately at the center of the curved surface area of the reflector.
  • the reflector used a curved surface obtained by dividing a cylinder into two along the central axis and a tunnel shape extending tangentially from both ends of the curved surface.
  • the irradiation light emitted from the near-infrared heater is reflected by the ceramic coating or the reflecting plate or directly radiated to the heated part without being reflected (Patent Document 4). ).
  • the non-stretched plug portion is a whitened portion excluding the bulged portion at the lower end, and the unexpanded bulged portion at the lower end of the plug portion is an unwhitened portion.
  • a technique for a telephthalate bottle is disclosed (Patent Document 5).
  • the whitened portion of the stopper portion has improved heat resistance and sufficient impact resistance, and furthermore, moderate flexibility can be obtained by the unwhitened portion at the lower end of the stopper portion. It is possible to prevent malfunctions that occur during filling work, etc., even if excessive force is applied.
  • Patent Document 1 Japanese Patent Publication No. 3-67499
  • Patent Document 2 Japanese Patent Publication No. 3-26646
  • Patent Document 3 Japanese Patent Publication No. 5-9261
  • Patent Document 4 Japanese Patent Publication No. 6-22876
  • Patent Document 5 Japanese Patent Publication No. 4-79901
  • the conventional heater unit irradiates the irradiated light almost radially toward the irradiation side
  • the conventional heater unit irradiates it off the mouth and neck while the ceramic coating and the reflecting plate reflect the irradiation light.
  • the mouth and neck portion of the saturated polyester hollow body has a complicated shape in which the thread thickness and neck ring are provided on the outer periphery of the lower portion of the mouth and neck portion and the wall thickness is not constant. It was obvious. Furthermore, it was necessary to heat uniformly in the circumferential direction.
  • a saturated polyester hollow body that solves the above problems is rotated. By condensing the irradiation light on the part to be heated and crystallized, it is heated according to the temperature rise characteristics due to the shape, thickness, physical properties and light absorption rate of the neck and neck, and uniform.
  • An object of the present invention is to provide a heating and crystallization apparatus for a saturated polyester hollow body that enables crystallization and a heating method thereof.
  • the saturated polyester hollow body heat crystallization apparatus of the present invention is configured so that the saturated polyester hollow body rotates from the heater unit in the mouth and neck of the saturated polyester hollow body.
  • the saturated polyester hollow body heat crystallization apparatus for crystallizing the mouth and neck by irradiating and heating the light, wherein the heater unit heats the mouth and neck, and the heating lamp And a light collecting means for collecting the light emitted from the light collecting means, and an irradiation light control means for irradiating the light emitted from the light collecting means to a predetermined position of the mouth-and-neck portion with a predetermined light intensity. is there.
  • the present invention is configured such that the heater unit irradiates the light according to a temperature rise characteristic resulting from the shape, thickness, and light absorption rate of the mouth and neck.
  • the light condensing means is a reflecting plate having a fixed focal length
  • the irradiation light control means is installed in the installation position and / or the installation direction of the heating lamp and the light condensing means.
  • the position adjustment means is adjustable.
  • the structure of the heater unit can be simplified, and the irradiation light can be easily irradiated to a predetermined position of the mouth and neck with a predetermined light intensity.
  • Adjustment of the installation position is usually done by movement in the vertical and Z or horizontal directions.
  • the present invention has a configuration in which a plurality of the heater units are arranged side by side along the conveyance path of the saturated polyester hollow body.
  • the neck and neck of the saturated polyester hollow body can be continuously heated by passing them in front of a plurality of heater units, which enables continuous crystallization of the saturated polyester hollow body. Efficiency can be improved.
  • the present invention has a configuration in which the illumination positions of the plurality of heater units are made different in the horizontal direction and the vertical direction.
  • each heater unit can heat a predetermined portion of the mouth and neck, so that the crystallinity of each portion of the mouth and neck can be controlled accurately and easily.
  • the method for heating a saturated polyester hollow body according to the present invention is to heat the saturated polyester hollow body with light from a heater unit in a state where the saturated polyester hollow body is rotated.
  • the saturated polyester hollow body is heated by crystallizing the mouth-and-neck part by condensing light from the heater unit at a predetermined position on the mouth-and-neck part with a predetermined light intensity.
  • a method of heating the neck is to heat the saturated polyester hollow body with light from a heater unit in a state where the saturated polyester hollow body is rotated.
  • the saturated polyester hollow body is heated by crystallizing the mouth-and-neck part by condensing light from the heater unit at a predetermined position on the mouth-and-neck part with a predetermined light intensity.
  • the present invention is also effective as a heating method, and can efficiently irradiate light to the mouth and neck, so that the energy of the heating lamp can be used effectively and power consumption can be reduced. it can. Furthermore, since light is irradiated while the saturated polyester hollow body is rotated, uniform heating in the circumferential direction can be performed.
  • the present invention is a method of irradiating the light according to the temperature rise characteristics resulting from the shape, thickness, and light absorption rate of the mouth and neck.
  • the neck and neck can be efficiently and uniformly crystallized even if the shape and the like of the mouth and neck of the saturated polyester hollow body become complicated.
  • the crystallinity can be controlled with high accuracy, and desired characteristics can be obtained.
  • the present invention is a method in which focusing is performed on a portion near the axial center of the mouth-and-neck portion, and then heating is performed by focusing on a portion in front of the focal point.
  • the present invention is a method for heating the neck ring portion of the mouth-neck portion with a focused focal point.
  • the heating and crystallizing apparatus for saturated polyester hollow body and the heating method therefor according to the present invention it is possible to efficiently irradiate the neck and neck with light. Can be improved. Furthermore, since light is irradiated while the saturated polyester hollow body is rotated, uniform heating in the circumferential direction can be performed.
  • the mouth and neck can be crystallized more uniformly. .
  • the crystallinity of each part of the mouth and neck can be controlled accurately and easily.
  • Fig. 1 shows a schematic plan view of an apparatus for heating and crystallizing a saturated polyester hollow body, which is an embodiment of the present invention.
  • FIG. 2a is a schematic front view for explaining a heater unit of a saturated polyester hollow body heat crystallization apparatus according to an embodiment of the present invention.
  • FIG. 2b shows a schematic side view of the heater unit including the partial cross section AA of FIG. 2a.
  • FIG. 3a is a schematic side view for explaining the irradiation state of the first heater unit.
  • FIG. 3b shows a schematic side view for explaining the irradiation state of the second heater unit.
  • FIG. 3c shows a schematic side view for explaining the irradiation state of the third heater unit.
  • FIG. 3d shows a schematic side view for explaining the irradiation state of the fourth heater unit.
  • FIG. 3e A schematic side view for explaining the irradiation state of the fifth and sixth heater units is shown.
  • FIG. 3f shows a schematic side view for explaining the irradiation state of the seventh and eighth heater units.
  • FIG. 1 shows a schematic plan view of an apparatus for heating and crystallizing a saturated polyester hollow body, which is an embodiment of the present invention.
  • the heat crystallization apparatus 1 includes a conveying means 20 for conveying a preform 10 of a plastic bottle that is a saturated polyester hollow body, and a mouth portion 11 of the preform 10 that is a neck and neck of the saturated polyester hollow body.
  • the configuration includes a plurality of heater units 30a and 30f that crystallize the mouth portion 11 by irradiating and heating the irradiation light 9.
  • the heat crystallization apparatus 1 is usually used as a heating unit of a preform crystallization apparatus (not shown).
  • the heat crystallization apparatus 1 according to the present invention is not limited to the case where it is used for a preform crystallization apparatus.
  • the conveying means 20 includes a pair of turrets 21, a chain conveyor 22 hung on the turret 21, and a holder 210 that is rotatably connected to the chain conveyor 22 and into which the preform 10 is inserted. .
  • the turret 21 is rotated by a motor (not shown) and continuously conveys a holder 210 connected to the chain conveyor 22. Then, the feeder 23 inserts the preform 10 into the empty holder 210 to be conveyed with the mouth 11 exposed, and passes through the heating regions 25 and 26 facing the discharger 24 force. Take out 10 holder power.
  • the conveying means 20 is a known one.
  • the holder 210 is provided with a pinion, and racks are installed at predetermined positions in the heating areas 25 and 26.
  • the pinion rotates in mesh with the rack, so that the preform 10 is conveyed while rotating around the longitudinal axis, and in the circumferential direction. Heated uniformly.
  • the rotation mechanism is not limited to the above mechanism.
  • FIG. 2a is a schematic front view for explaining a heater unit of a saturated polyester hollow body heat crystallization apparatus according to an embodiment of the present invention.
  • FIG. 2b shows a schematic side view of the heater unit including the partial cross section AA of FIG. 2a. 2a and 2b, the heater unit 30 has a configuration in which a rod-shaped halogen lamp 31 and a reflector 32 are housed as a heating lamp in an elongated rectangular box-shaped housing 33, and is supported by a position adjusting means 40. Yes.
  • Each heater unit 30a-30f has a different illumination position, and other configurations are almost the same.
  • halogen lamp refers to an infrared bulb in which an inert gas and a trace amount of a halogen substance are added to a sealed gas.
  • a halogen lamp 31 that irradiates near infrared rays is used.
  • the heating lamp to be used is not limited to the halogen lamp 31.
  • a general infrared lamp heated by light irradiation can be used.
  • the heating lamp is not limited to a rod shape.
  • the reflector 32 is formed in a curved shape having a constant focal length, and reflects the irradiation light 9 emitted from the halogen lamp 31 in two dimensions.
  • the shape is focused at any point F (lighting point) of the mouth 11. Therefore, in three dimensions, as shown in FIG. 2a, the irradiation light 9 emitted from the rod-shaped halogen lamp 31 is reflected linearly.
  • the heater unit 30 can irradiate most of the light on the mouth 11 except for part of the light emitted from the halogen lamp 31, improving energy efficiency and power consumption. Can be reduced.
  • the heater unit 30 does not need to be cooled with water, the structure can be simplified, and the equipment cost can be reduced. Furthermore, by efficiently irradiating the irradiation part 9 with the irradiation light 9, for example, it is not necessary to heat with hot air, so that the structure can be further simplified.
  • the casing 33 has a shape of an elongated quadrangular prism, and has a structure that houses the reflector 32 and the halogen lamp 31 from the side surface on the irradiation side.
  • the shape of the casing 33 is not limited to this example.
  • the housing 33 supports both ends of the halogen lamp 31 and is not shown in the figure. Power cable force of amplifier 31 Pulled out from both end faces.
  • the position adjusting means 40 includes a base plate 41 standing upward, a vertical moving plate 42 supported by the base plate 41 so as to be slidable in the vertical direction, and the vertical moving plate 42 in the vertical direction.
  • Bolt 45a and lock nut 45b a connecting member 46 that supports the casing 33 that is mounted on the horizontal movement plate 44 so as to be rotatable in the vertical direction, and a bolt that positions the connecting member 46 in the rotating direction. It has power with 47a.
  • the heater unit 30 can freely adjust the horizontal and vertical distances and the vertical irradiation angle with respect to the mouth portion 11 of the preform 10.
  • the heater units 30a-30f include the position adjusting means 40 having the above-described configuration, and the position adjusting means 40 can easily set the positional relationship between the housing 33 and the mouth portion 11.
  • the irradiation light 9 can be irradiated to a predetermined position of the mouth portion 11 with a predetermined light intensity.
  • the heater units 30a-30f have a simplified structure, the manufacturing cost can be reduced.
  • the position adjusting means 40 is not limited to the above-described configuration.
  • the position adjusting means 40 is a mechanism capable of heating the mouth portion 11 by condensing it at a predetermined position of the mouth portion 11 with a predetermined light intensity. Just do it.
  • the light intensity is adjusted only by the positional relationship of the heater unit. For example, the voltage of the halogen lamp 31 may be controlled.
  • the heating and crystallization apparatus 1 includes a total of eight heater units 30 a to 30 f arranged in parallel in heating regions 25 and 26 along the conveyance path of the preform 10.
  • the mouth portion 11 of the preform 10 can be continuously heated by passing in front of the plurality of heater units 30a-30f, and the mouth portion 11 can be continuously crystallized.
  • the production efficiency can be improved.
  • the number of heater units is eight, but the present invention is not limited to this. Further, although no heater unit is provided on the outer peripheral portion of the right turret 21, it is possible to use this area as a heating area, thereby saving space. [0033]
  • the heat crystallization apparatus 1 has a configuration in which the positions illuminated by the heater units 30a and 30f are different. In this way, each heater unit 30a 30f can heat a predetermined part of the mouth part 11, so that the degree of crystallinity of each part of the mouth part 11 can be controlled accurately and easily.
  • each heater unit 30a 30f emits the irradiation light 9 of the mouth portion 11 according to the temperature rise characteristics resulting from the shape, thickness, and light absorption rate of the mouth portion 11 of the preform 10.
  • irradiating at a predetermined position with a predetermined light intensity it is possible to heat the mouth 11 where unevenness in crystallization occurs only by irradiating light with a substantially uniform light intensity based on the temperature rise characteristics. Since the point to be heated can be intensively heated, more uniform crystallization can be realized.
  • the crystallinity can be controlled with high accuracy, and desired characteristics can be obtained.
  • the "temperature rise characteristic” refers to the rate of temperature rise of each part of the mouth and neck when the mouth and neck are heated by irradiation with light.
  • a plastic bottle preform 10 has a thread 13 formed at the upper part of the mouth part 11, a stepped part 14 formed at the middle step part, and a neck ring 12 formed at the lower part. For this reason, the temperature rise characteristic of the thick part becomes small, and the temperature does not easily rise.
  • the preform 10 before crystallization is colorless and transparent, but when it is crystallized, it changes to white and the light absorption rate changes.
  • the whitened part from the colorless and transparent state has a large temperature rise characteristic and the temperature rises rapidly, while the part where the irradiated light 9 is blocked by the whitened part has a rapidly small temperature rise characteristic due to the irradiated light 9. Become.
  • the irradiation condition-operation of the heat crystallization apparatus according to the present invention is not limited to this.
  • FIG. 3a shows a schematic side view for explaining the irradiation state of the first heater unit 30a.
  • the first heater unit 30a has the irradiation light 9 collected at the upper center of the mouth 11. It is adjusted to light. That is, the heater unit 30a is set at a position above the mouth portion 11 and close to the mouth portion 11 in a state of facing the horizontal direction.
  • the heating and crystallization apparatus 1 heats the mouth 11 as a whole with the irradiation light 9 emitted from the heater unit 30a, and particularly heats the thread 13 above the mouth 11.
  • FIG. 3b shows a schematic side view for explaining the irradiation state of the second heater unit 30b.
  • the second heater unit 30 b is adjusted so that the irradiation light 9 is collected on the upper outer periphery of the mouth portion 11. That is, the heater unit 30b is set at a position away from the mouth portion 11 in the horizontal direction as compared with the heater unit 30a.
  • the heating and crystallization apparatus 1 focuses and heats the thread 13 of the mouth 11 with the irradiation light 9 irradiated from the heater unit 30b to cause crystallization.
  • FIG. 3c shows a schematic side view for explaining the irradiation state of the third heater unit 30c.
  • the third heater unit 30c is adjusted so that the irradiation light 9 is condensed at the center of the middle part of the mouth part 11. That is, the heater unit 30c is set at a position that is closer to the horizontal direction from the mouth portion 11 and moved downward than the heater unit 30b.
  • the heating and crystallization apparatus 1 heats the mouth part 11 as a whole by the irradiation light 9 emitted from the heater unit 30c, and particularly heats the stepped part 14 in the middle part of the mouth part 11.
  • FIG. 3d shows a schematic side view for explaining the irradiation state of the fourth heater unit 30d.
  • the fourth heater unit 30 d is adjusted so that the irradiation light 9 is condensed on the outer periphery of the middle part of the mouth 11.
  • the heater unit 30d is set at a position away from the mouth portion 11 in the horizontal direction as compared with the heater unit 30c.
  • the heating and crystallization apparatus 1 preferentially heats the stepped portion 14 of the mouth portion 11 with the irradiation light 9 emitted from the heater unit 30d to cause crystallization.
  • FIG. 3e shows a schematic side view for explaining the irradiation state of the fifth and sixth heater units 30e.
  • the fifth and sixth heater units 30e are adjusted so that the irradiation light 9 also collects an obliquely upward force on the outer periphery of the lower part of the mouth part 11. That is, the heater unit 30e is set at a position that is separated from the mouth portion 11 in the horizontal direction, moved upward, and rotated downward as compared with the heater unit 30d.
  • the heat crystallization apparatus 1 heats and crystallizes the lower neck ring 12 of the mouth part 11 with the irradiation light 9 emitted from the heater unit 30e.
  • Two heater units 30e are arranged side by side.
  • FIG. 3f shows a schematic side view for explaining the irradiation state of the seventh and eighth heater units 30f.
  • the seventh and eighth heater units 30f are adjusted so that the irradiation light 9 also collects an oblique upward force at the center of the lower part of the mouth part 11. That is, the heater unit 30f is set at a position closer to the horizontal direction from the mouth portion 11 than the heater unit 30e.
  • the heat crystallization apparatus 1 heats the entire upper surface and outer peripheral surface of the mouth 11 with the irradiation light 9 emitted from the heater unit 30f, and promotes crystallization.
  • Two heater units 30 f are arranged side by side.
  • the saturated polyester hollow body heat crystallization apparatus 1 of the present embodiment can collect the light emitted from the halogen lamp 31, and thus can efficiently be applied to the mouth portion 11 to be heated. Irradiation light 9 can be irradiated, and energy efficiency can be improved. Further, since irradiation light having a predetermined light intensity is irradiated to a predetermined position of the mouth portion 11 according to the temperature rise characteristic of the mouth portion 11, for example, for a mouth portion 11 having a different thickness and a complicated shape. However, more uniform crystallization can be realized.
  • the mouth portion 11 can be irradiated with the irradiation light 9 while rotating the preform 10, uniform heating can be performed in the circumferential direction.
  • the mouth portion 11 of the preform 10 was heated to crystallize the mouth portion 11 using the heat crystallization apparatus 1 (the number of heater units was 20).
  • the heat crystallization apparatus 1 is The illumination position was optimally set so as to change both in the horizontal and vertical directions, and almost the entire mouth 11 was crystallized so that the average crystallinity was about 35 volume percent.
  • the preform initial temperature was about 35 ° C and the heating time was about 2 minutes.
  • the total power consumption of the heater unit 30 was 40 KW.
  • the total power consumption of the heater unit was 120 KW.
  • the heat crystallization apparatus 1 was able to save about 67% of the power consumption of the heater unit 30.
  • the mouth portion 11 of the preform 10 was heated and the mouth portion 11 was crystallized by using the heating and crystallization apparatus 1 that was optimally set so that the illuminating position changed in the horizontal direction. .
  • the other conditions were almost the same as in the first example.
  • the total power consumption of the heater unit 30 was 45 KW. In other words, the heat crystallization apparatus 1 was able to save about 63% of the power consumption of the heater unit 30.
  • the heating and crystallization apparatus 1 of the present embodiment is optimally set so that the illumination position changes in the horizontal direction, but is not limited to this configuration.
  • the illumination position changes in the vertical direction.
  • the mouth 11 is crystallized by irradiating and heating the irradiation light 9 from the heater unit 30 to the mouth 11 of the preform 10 while rotating the preform 10.
  • This is a heating method for a saturated polyester hollow body, in which the light from the heater unit 30 is condensed at a predetermined position of the mouth portion 11 with a predetermined light intensity to heat the mouth portion 11.
  • the focal length is adjusted so that the irradiation area of the irradiation light 9 is reduced, the light intensity is increased. Conversely, if the focal length is adjusted so that the irradiation area is increased, the light intensity is reduced. In this way, the light intensity at a predetermined position of the mouth portion 11 can be easily adjusted, and the heating energy can be accurately controlled.
  • the mouth portion 11 having a complicated shape, a different thickness, or a different light absorptivity has different temperature rise characteristics in each portion. For example, when heated by light of uniform light intensity, such as sunlight, the thicker part becomes more difficult to heat up as the part close to the heat source heats up or immediately leaves the heat source.
  • the portion where the crystallization is insufficient has a low mechanical strength, and the portion where the crystallization has progressed too much becomes brittle and deforms. It is required to crystallize.
  • the light intensity of the light irradiated to each part is controlled. In this way, for example, even for the mouth part 11 having a complicated shape. Because the temperature profile of each part can be matched, it can be uniformly crystallized.For example, when the front part is whitened against the heat source, the rear part where light is blocked rises in temperature due to heat conduction. As a result, the temperature rise characteristic is reduced. In such a case, first, the focal length of the light collection should be adjusted to the rear part and heated gradually from the rear to the front so that the light is not blocked.
  • the light is preferentially condensed on a portion of the mouth portion 11 where the light is difficult to reach, whereby the mouth portion 11 is whitened or discolored by heating and the light absorption rate is changed.
  • the heating can be efficiently performed according to the change in the light absorption rate or using the change.
  • the reflector 32 having a fixed focal length is used as the light collecting means, and the installation position and / or orientation of the halogen lamp 31 and the reflector 32 is adjusted. If it does in this way, the irradiation light 9 can be easily irradiated to the predetermined position of the mouth part 11 with predetermined light intensity.
  • the heating and crystallization apparatus 1 of the above embodiment is not limited to the force set by the heater units 30a and 30f according to the shape of the mouth portion 11 of the preform 10, and is not limited to the above settings.
  • the heater units 30c and 30d can be replaced or the number of heater units can be increased or decreased.
  • the heating and crystallization apparatus for a saturated polyester hollow body of the present invention and the heating method thereof are not limited to the mouth 11 of the preform 10 of the PET bottle.
  • the mouth and neck of containers other than PET bottles It can be suitably used for the part.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

A system which can crystallize a saturated polyester hollow body uniformly by heating it while kept spinning depending on temperature rise characteristics resulting from the shape, thickness and light absorption rate at the neck part, and which improves energy efficiency by condensing irradiation light at a part to be crystallized. In the thermal crystallization system (1) of a saturated polyester hollow body for crystallizing the mouth part (11) of a spinning perform (10) by irradiating the mouth part (11) with light from a heater unit (30) thereby heating the mouth part (11), the heater unit (30) comprises a halogen lamp (31), a reflector (32), and a position adjusting means (40) for irradiating a specified position of the mouth part (11) with irradiation light (9) at a specified intensity.

Description

明 細 書  Specification
飽和ポリエステル中空体の加熱結晶化装置及びその加熱方法  Heated crystallization apparatus for saturated polyester hollow body and heating method thereof
技術分野  Technical field
[0001] 本発明は、飽和ポリエステル中空体の加熱結晶化装置及びその加熱方法に関し、 さらに詳しくは、ポリエチレンテレフタレート等の飽和ポリエステルよりなる有底プリフォ ームもしくはボトル，カップ等の、キャップ等で密封されるべき口頸部を加熱結晶化す る、飽和ポリエステル中空体の加熱結晶化装置及びその加熱方法に関する。  TECHNICAL FIELD [0001] The present invention relates to a heated crystallization apparatus for a saturated polyester hollow body and a heating method therefor, and more specifically, a bottomed preform made of a saturated polyester such as polyethylene terephthalate or a cap such as a bottle or cup. The present invention relates to a heating and crystallization apparatus for a saturated polyester hollow body that heats and crystallizes the mouth and neck to be heated and a heating method thereof.
背景技術  Background art
[0002] 飽和ポリエステルよりなるボトルは、通常射出成形等による形成された無定形組織 の有底プリフォームを、口頸部となるべき部分を残して、 2軸延伸ブロー成形すること によって製造される。  [0002] A bottle made of a saturated polyester is usually produced by biaxially stretching blow-molding an amorphous bottomed preform formed by injection molding or the like, leaving a portion that should become the mouth and neck. .
この種のボトルは、肩部，胴部及び底部が分子配向されており、透明性，ガスバリヤ 一性，強度，耐衝撃性等の容器特性に優れ、さらに、これらの肩部，胴部及び底部 をヒートセットしたボトルは、熱間充填した場合に、これらの部分が収縮による変形が 起こり難レ、とレ、う利点を有してレ、る。  This type of bottle has molecular orientation at the shoulder, body and bottom, and has excellent container properties such as transparency, gas barrier integrity, strength, and impact resistance. Furthermore, these shoulder, body and bottom Bottles that have been heat set have the advantage that these parts are less likely to deform due to shrinkage when hot filled.
[0003] ところで、容器の口頸部は無定形組織のままであるので、熱間充填の際に口頸部 全体もしくはねじ部等は変形し、密封性が損なわれやすレ、。 [0003] By the way, since the mouth and neck of the container remains an amorphous tissue, the entire neck and neck or the threaded portion is deformed during hot filling, and the sealing performance is likely to be impaired.
この欠点を解消するため、プリフォーム又は容器の口頸部を加熱して結晶化するこ とにより、 口頸部の硬度や耐熱性を向上させる技術が提案されている（特許文献 1)。  In order to eliminate this drawback, a technique for improving the hardness and heat resistance of the mouth and neck by heating and crystallizing the mouth or neck of the preform or container has been proposed (Patent Document 1).
[0004] また、 口頸部の変形を起こさずにし力、も効率的に結晶化させるために、 口頸部を第[0004] In order to efficiently crystallize the force and neck without causing deformation of the mouth and neck,
1段階で低い温度で加熱した後、引き続き加熱温度を高めて加熱'結晶化させること が提案されてレ、る (特許文献 2)。 It has been proposed that after heating at a low temperature in one step, the heating temperature is subsequently increased to cause heating and crystallization (Patent Document 2).
[0005] さらに、プリフォーム搬送通路に沿って配列された複数個の近赤外線加熱装置によ つて、 口頸部を加熱結晶化する結晶化方法の技術が提案されており、この技術によ れば、 口頸部の内外面を均一に加熱することができる（特許文献 3)。 [0005] Furthermore, a technique of a crystallization method in which the neck of the mouth is heated and crystallized by a plurality of near infrared heating devices arranged along the preform conveyance path has been proposed. For example, the inner and outer surfaces of the mouth and neck can be heated uniformly (Patent Document 3).
[0006] また、従来のヒータユニットは、反照射側半面にセラミックコーティングの施された近 赤外線ヒータと、反射板とから構成されている。 この近赤外線ヒータは、反射板の曲面領域のほぼ中央部の、上下方向の二箇所に 併設してある。また、反射板は、円筒を中心軸に沿って二つ割りした曲面とこの曲面 の両端部から接線方向に延長されたトンネル形状を採用していた。 [0006] Further, the conventional heater unit includes a near-infrared heater having a ceramic coating on the half surface on the counter-irradiation side and a reflector. This near-infrared heater is provided at two locations in the vertical direction, approximately at the center of the curved surface area of the reflector. In addition, the reflector used a curved surface obtained by dividing a cylinder into two along the central axis and a tunnel shape extending tangentially from both ends of the curved surface.
このような形状とすることにより、近赤外線ヒータから照射された照射光は、セラミック コーティングや反射板に反射され、又は反射されることなく直接に被加熱部に放射さ れていた (特許文献 4)。  By adopting such a shape, the irradiation light emitted from the near-infrared heater is reflected by the ceramic coating or the reflecting plate or directly radiated to the heated part without being reflected (Patent Document 4). ).
[0007] さらに、延伸されていないロ栓部を、下端の膨出部を除いて、白化部分とするととも に、ロ栓部の下端の延伸されていない膨出部を未白化部分としたポリエチレンテレフ タレートボトルの技術が開示されている（特許文献 5)。この技術によれば、 ロ栓部の 白化部分が、耐熱性が向上するとともに十分な耐衝撃性を有し、さらに、ロ栓部の下 端の未白化部分によって、適度の柔軟性を得ることができ、充填作業等において、 過度の力が加えられても破損するといつた不具合を防止することができる。 [0007] Further, the non-stretched plug portion is a whitened portion excluding the bulged portion at the lower end, and the unexpanded bulged portion at the lower end of the plug portion is an unwhitened portion. A technique for a telephthalate bottle is disclosed (Patent Document 5). According to this technology, the whitened portion of the stopper portion has improved heat resistance and sufficient impact resistance, and furthermore, moderate flexibility can be obtained by the unwhitened portion at the lower end of the stopper portion. It is possible to prevent malfunctions that occur during filling work, etc., even if excessive force is applied.
特許文献 1：特公平 3-67499号公報  Patent Document 1: Japanese Patent Publication No. 3-67499
特許文献 2：特公平 3-26646号公報  Patent Document 2: Japanese Patent Publication No. 3-26646
特許文献 3：特公平 5-9261号公報  Patent Document 3: Japanese Patent Publication No. 5-9261
特許文献 4：特公平 6-22876号公報  Patent Document 4: Japanese Patent Publication No. 6-22876
特許文献 5：特公平 4 - 79901号公報  Patent Document 5: Japanese Patent Publication No. 4-79901
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0008] し力しながら、従来のヒータユニットは、セラミックコーティングや反射板が照射光を 反射しているものの、照射側に向かってほぼ放射状に照射しているので、 口頸部から 外れて照射される照射光が多ぐ照射光を加熱 ·結晶化が必要な部分のみに集光す ることが困難であった。 However, although the conventional heater unit irradiates the irradiated light almost radially toward the irradiation side, the conventional heater unit irradiates it off the mouth and neck while the ceramic coating and the reflecting plate reflect the irradiation light. However, it was difficult to focus the irradiated light with much irradiated light only on the part that required heating and crystallization.
また、飽和ポリエステル中空体の口頸部は、 口頸部の下部外周にねじ山やネックリ ング等が設けられており、肉厚が一定でない複雑な形状を有しており、前記問題がよ り顕在化していた。さらに、周方向に均一に加熱する必要もあった。  Further, the mouth and neck portion of the saturated polyester hollow body has a complicated shape in which the thread thickness and neck ring are provided on the outer periphery of the lower portion of the mouth and neck portion and the wall thickness is not constant. It was obvious. Furthermore, it was necessary to heat uniformly in the circumferential direction.
また、エネルギーの有効利用の点からも改良が求められていた。  Moreover, the improvement was calculated | required also from the point of the effective use of energy.
[0009] 本発明は、上記諸問題を解決すベぐ飽和ポリエステル中空体を自転させた状態 で、照射光を加熱'結晶化させようとする部分に集光することにより、 口頸部の形状、 肉厚、物性及び光吸収率に起因する昇温特性に応じて加熱して、均一な結晶化を 可能とする、飽和ポリエステル中空体の加熱結晶化装置及びその加熱方法の提供を 目的とする。 [0009] In the present invention, a saturated polyester hollow body that solves the above problems is rotated. By condensing the irradiation light on the part to be heated and crystallized, it is heated according to the temperature rise characteristics due to the shape, thickness, physical properties and light absorption rate of the neck and neck, and uniform. An object of the present invention is to provide a heating and crystallization apparatus for a saturated polyester hollow body that enables crystallization and a heating method thereof.
課題を解決するための手段  Means for solving the problem
[0010] この目的を達成するために、本発明の飽和ポリエステル中空体の加熱結晶化装置 は、飽和ポリエステル中空体の口頸部に、前記飽和ポリエステル中空体を自転させ た状態で、ヒータユニットからの光を照射して加熱することにより、前記口頸部を結晶 化させる飽和ポリエステル中空体の加熱結晶化装置であって、前記ヒータユニットが 、 口頸部を加熱する加熱ランプと、この加熱ランプから照射された光を集光させる集 光手段と、前記集光手段から照射された光を前記口頸部の所定位置に所定の光強 度で照射する照射光制御手段とを具備した構成としてある。 [0010] In order to achieve this object, the saturated polyester hollow body heat crystallization apparatus of the present invention is configured so that the saturated polyester hollow body rotates from the heater unit in the mouth and neck of the saturated polyester hollow body. The saturated polyester hollow body heat crystallization apparatus for crystallizing the mouth and neck by irradiating and heating the light, wherein the heater unit heats the mouth and neck, and the heating lamp And a light collecting means for collecting the light emitted from the light collecting means, and an irradiation light control means for irradiating the light emitted from the light collecting means to a predetermined position of the mouth-and-neck portion with a predetermined light intensity. is there.
このようにすると、口頸部に効率よく光を照射することができるので、加熱ランプ本体 のエネルギーを有効に利用でき、消費電力を低減することができる。また、加熱した レ、ポイントを重点的に加熱できるので、加熱条件を精度よく制御することができる。さ らに、飽和ポリエステル中空体を自転させた状態で、光が照射されるので、周方向に 均一な加熱を行うことができる。  In this way, light can be efficiently applied to the mouth and neck, so that the energy of the heating lamp body can be used effectively and power consumption can be reduced. In addition, since the heated layer and point can be intensively heated, the heating conditions can be controlled with high accuracy. Furthermore, since light is irradiated while the saturated polyester hollow body is rotated, uniform heating in the circumferential direction can be performed.
[0011] また、本発明は、前記ヒータユニットが、前記口頸部の形状， 肉厚及び光吸収率に 起因する昇温特性に応じて、前記光を照射する構成としてある。  [0011] Further, the present invention is configured such that the heater unit irradiates the light according to a temperature rise characteristic resulting from the shape, thickness, and light absorption rate of the mouth and neck.
このようにすると、ほぼ均一な光強度の光を照射しただけでは結晶化にむらが発生 する口頸部に対して、昇温特性にもとづいて加熱したいポイントを重点的に加熱でき るので、より均一な結晶化を実現することができる。また、結晶化度を精度よく制御す ることが可能となり、所望する特性を得ることができる。  In this way, it is possible to focus on the point that you want to heat based on the temperature rise characteristics of the mouth and neck where crystallization unevenness occurs only by irradiating light with a nearly uniform light intensity. Uniform crystallization can be realized. In addition, the crystallinity can be accurately controlled, and desired characteristics can be obtained.
[0012] また、本発明は、前記集光手段を一定の焦点距離を有する反射板とし、かつ、前記 照射光制御手段を、前記加熱ランプ及び集光手段の設置位置及び/又は設置方 向を調整可能な位置調整手段とした構成としてある。  [0012] In the present invention, the light condensing means is a reflecting plate having a fixed focal length, and the irradiation light control means is installed in the installation position and / or the installation direction of the heating lamp and the light condensing means. The position adjustment means is adjustable.
このようにすると、ヒータユニットの構造を単純化することができるとともに、照射光を 口頸部の所定位置に所定の光強度で容易に照射することができる。なお、 設置位置の調整は、通常、垂直方向及び Z又は水平方向への移動によって行われ る。 In this way, the structure of the heater unit can be simplified, and the irradiation light can be easily irradiated to a predetermined position of the mouth and neck with a predetermined light intensity. In addition, Adjustment of the installation position is usually done by movement in the vertical and Z or horizontal directions.
[0013] また、本発明は、前記ヒータユニットを、前記飽和ポリエステル中空体の搬送経路に 沿って、複数個並設した構成としてある。  [0013] Further, the present invention has a configuration in which a plurality of the heater units are arranged side by side along the conveyance path of the saturated polyester hollow body.
このようにすると、飽和ポリエステル中空体の口頸部を、複数のヒータユニットの前を 連続して通過させることにより連続的に加熱することができ、飽和ポリエステル中空体 の連続結晶化が可能となり生産効率を向上させることができる。  In this way, the neck and neck of the saturated polyester hollow body can be continuously heated by passing them in front of a plurality of heater units, which enables continuous crystallization of the saturated polyester hollow body. Efficiency can be improved.
[0014] また、本発明は、前記複数のヒータユニットの照光する位置を、水平方向及び垂直 方向に異ならせた構成としてある。 [0014] Further, the present invention has a configuration in which the illumination positions of the plurality of heater units are made different in the horizontal direction and the vertical direction.
このようにすると、各ヒータユニットが、 口頸部の所定の部分を加熱することができる ので、口頸部の各部分の結晶化度を精度よくかつ容易に制御することができる。  In this way, each heater unit can heat a predetermined portion of the mouth and neck, so that the crystallinity of each portion of the mouth and neck can be controlled accurately and easily.
[0015] また、本発明の飽和ポリエステル中空体の加熱方法は、飽和ポリエステル中空体の 口頸部に、前記飽和ポリエステル中空体を自転させた状態で、ヒータユニットからの 光を照射し加熱することにより、前記口頸部を結晶化させる飽和ポリエステル中空体 の加熱方法であって、前記ヒータユニットからの光を、前記口頸部の所定位置に所定 の光強度で集光させることにより、前記口頸部を加熱する方法としてある。 [0015] In addition, the method for heating a saturated polyester hollow body according to the present invention is to heat the saturated polyester hollow body with light from a heater unit in a state where the saturated polyester hollow body is rotated. The saturated polyester hollow body is heated by crystallizing the mouth-and-neck part by condensing light from the heater unit at a predetermined position on the mouth-and-neck part with a predetermined light intensity. As a method of heating the neck.
このように、本発明は、加熱方法としても有効であり、 口頸部に効率よく光を照射す ることができるので、加熱ランプのエネルギーを有効に利用でき、消費電力を低減す ることができる。さらに、飽和ポリエステル中空体を自転させた状態で、光が照射され るので、周方向に均一な加熱を行うことができる。  As described above, the present invention is also effective as a heating method, and can efficiently irradiate light to the mouth and neck, so that the energy of the heating lamp can be used effectively and power consumption can be reduced. it can. Furthermore, since light is irradiated while the saturated polyester hollow body is rotated, uniform heating in the circumferential direction can be performed.
[0016] また、本発明は、前記口頸部の形状，肉厚及び光吸収率に起因する昇温特性に 応じて、前記光を照射する方法としてある。 [0016] Further, the present invention is a method of irradiating the light according to the temperature rise characteristics resulting from the shape, thickness, and light absorption rate of the mouth and neck.
このようにすると、飽和ポリエステル中空体の口頸部の形状等が複雑になっても、 口 頸部を効率よくかつ均一に結晶化することができる。また、結晶化度を精度よく制御 することが可能となり、所望する特性を得ることができる。  In this way, the neck and neck can be efficiently and uniformly crystallized even if the shape and the like of the mouth and neck of the saturated polyester hollow body become complicated. In addition, the crystallinity can be controlled with high accuracy, and desired characteristics can be obtained.
[0017] また、本発明は、前記口頸部の軸中心に近い部分に集光の焦点を合わせ、次に、 該焦点より手前の部分に焦点を合わせて加熱する方法としてある。 [0017] Further, the present invention is a method in which focusing is performed on a portion near the axial center of the mouth-and-neck portion, and then heating is performed by focusing on a portion in front of the focal point.
このようにすると、軸中心に近い部分から白化させることができ、光が遮られることに よって、昇温特性が低下するといつた不具合を防止することができる。 In this way, it can be whitened from the portion near the axis center, and the light is blocked Therefore, it is possible to prevent a malfunction when the temperature rise characteristic is lowered.
[0018] また、本発明は、前記口頸部のネックリング部に集光の焦点を合わせて加熱する方 法としてある。 [0018] In addition, the present invention is a method for heating the neck ring portion of the mouth-neck portion with a focused focal point.
このように、光が届きにくいネックリング部に光を優先的に集光させることにより、効 率よくカロ熱すること力 Sできる。  In this way, by preferentially concentrating light on the neck ring where it is difficult for light to reach, it is possible to efficiently heat the calories.
発明の効果  The invention's effect
[0019] 以上詳細に説明したように、本発明における飽和ポリエステル中空体の加熱結晶 化装置及びその加熱方法によれば、口頸部に効率よく光を照射することができるの で、エネルギー効率を改善することができる。さらに、飽和ポリエステル中空体を自転 させた状態で、光が照射されるので、周方向に均一な加熱を行うことができる。  [0019] As described in detail above, according to the heating and crystallizing apparatus for saturated polyester hollow body and the heating method therefor according to the present invention, it is possible to efficiently irradiate the neck and neck with light. Can be improved. Furthermore, since light is irradiated while the saturated polyester hollow body is rotated, uniform heating in the circumferential direction can be performed.
さらに、口頸部の形状， 肉厚及び光吸収率に起因する昇温特性にもとづいて、光 強度を容易に調整することができるので、 口頸部をより均一に結晶化することができ る。また、 口頸部の各部分の結晶化度を精度よくかつ容易に制御することもできる。 図面の簡単な説明  Furthermore, since the light intensity can be easily adjusted based on the temperature rise characteristics resulting from the shape, thickness and light absorption rate of the mouth and neck, the mouth and neck can be crystallized more uniformly. . In addition, the crystallinity of each part of the mouth and neck can be controlled accurately and easily. Brief Description of Drawings
[0020] [図 1]本発明の実施形態に力かる飽和ポリエステル中空体の加熱結晶化装置の概略 平面図を示している。  [0020] [Fig. 1] Fig. 1 shows a schematic plan view of an apparatus for heating and crystallizing a saturated polyester hollow body, which is an embodiment of the present invention.
[図 2a]本発明の実施形態に力かる飽和ポリエステル中空体の加熱結晶化装置のヒー タユニットを説明するための概略正面図を示している。  FIG. 2a is a schematic front view for explaining a heater unit of a saturated polyester hollow body heat crystallization apparatus according to an embodiment of the present invention.
[図 2b]図 2aの部分断面 A— Aを含むヒータユニットの概略側面図を示している。  FIG. 2b shows a schematic side view of the heater unit including the partial cross section AA of FIG. 2a.
[図 3a]第一のヒータユニットの照射状態を説明する概略側面図を示している。  FIG. 3a is a schematic side view for explaining the irradiation state of the first heater unit.
[図 3b]第二のヒータユニットの照射状態を説明する概略側面図を示している。  FIG. 3b shows a schematic side view for explaining the irradiation state of the second heater unit.
[図 3c]第三のヒータユニットの照射状態を説明する概略側面図を示している。  FIG. 3c shows a schematic side view for explaining the irradiation state of the third heater unit.
[図 3d]第四のヒータユニットの照射状態を説明する概略側面図を示している。  FIG. 3d shows a schematic side view for explaining the irradiation state of the fourth heater unit.
[図 3e]第五及び第六のヒータユニットの照射状態を説明する概略側面図を示してい る。  [FIG. 3e] A schematic side view for explaining the irradiation state of the fifth and sixth heater units is shown.
[図 3f]第七及び第八のヒータユニットの照射状態を説明する概略側面図を示している 符号の説明 [0021] 1 加熱結晶化装置 FIG. 3f shows a schematic side view for explaining the irradiation state of the seventh and eighth heater units. [0021] 1 Heat crystallization apparatus
9 照射光  9 Irradiation light
10 プリフォーム  10 Preform
11 口部  11 mouth
12 ネックリング  12 Neck ring
13 ねじ山  13 Thread
14 段付き部  14 Stepped part
20 搬送手段  20 Transport means
21 ターレット  21 Turret
22 チェーンコンベア  22 Chain conveyor
23 供給機  23 Feeder
24 排出機  24 Ejector
25， 26 加熱領域  25, 26 Heating zone
30 (30a〜30f) ヒータユニット  30 (30a-30f) Heater unit
31 ノヽロゲンランプ  31 Norogen lamp
32 反射板  32 reflector
33 筐体  33 Enclosure
40 位置調整手段  40 Position adjustment means
41 ベース板  41 Base plate
42 垂直方向移動板  42 Vertical movement plate
43a, 45a, 47a ボノレ卜  43a, 45a, 47a Bonore
43b, 45b ロックナツ卜  43b, 45b
44 水平方向移動板  44 Horizontal movement plate
46 連結部材  46 Connecting members
210 ホノレダー  210 Honoreda
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0022] 以下、本発明の好適な各実施形態について、図面を参照して説明する [0023] [飽和ポリエステル中空体の加熱結晶化装置] 図 1は、本発明の実施形態に力、かる飽和ポリエステル中空体の加熱結晶化装置の 概略平面図を示している。 [0022] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. [0023] [Heat crystallization apparatus for saturated polyester hollow body] FIG. 1 shows a schematic plan view of an apparatus for heating and crystallizing a saturated polyester hollow body, which is an embodiment of the present invention.
図 1において、加熱結晶化装置 1は、飽和ポリエステル中空体であるペットボトルの プリフォーム 10を搬送する搬送手段 20と、飽和ポリエステル中空体の口頸部である プリフォーム 10の口部 11に、照射光 9を照射して加熱することにより、口部 11を結晶 化させる複数のヒータユニット 30a 30fを備えた構成としてある。  In FIG. 1, the heat crystallization apparatus 1 includes a conveying means 20 for conveying a preform 10 of a plastic bottle that is a saturated polyester hollow body, and a mouth portion 11 of the preform 10 that is a neck and neck of the saturated polyester hollow body. The configuration includes a plurality of heater units 30a and 30f that crystallize the mouth portion 11 by irradiating and heating the irradiation light 9.
また、加熱結晶化装置 1は、通常、プリフォーム結晶化装置（図示せず）の加熱部と して使用される。なお、本発明にかかる加熱結晶化装置 1は、プリフォーム結晶化装 置に用いられる場合に限定されるものではない。  Further, the heat crystallization apparatus 1 is usually used as a heating unit of a preform crystallization apparatus (not shown). The heat crystallization apparatus 1 according to the present invention is not limited to the case where it is used for a preform crystallization apparatus.
[0024] (搬送手段） [0024] (Conveying means)
搬送手段 20は、一対のターレット 21と、このターレット 21に掛けられたチェーンコン ベア 22と、チェーンコンベア 22に自転自在に連結され、プリフォーム 10が挿入され るホルダー 210とを備えた構成としてある。  The conveying means 20 includes a pair of turrets 21, a chain conveyor 22 hung on the turret 21, and a holder 210 that is rotatably connected to the chain conveyor 22 and into which the preform 10 is inserted. .
ターレット 21は、モータ（図示せず）によって回転し、チェーンコンベア 22に連結さ れたホルダー 210を連続的に搬送する。そして、供給機 23が、搬送されてくる空のホ ルダー 210に、 口部 11が露出した状態でプリフォーム 10を挿入し、排出機 24力 対 向する加熱領域 25, 26を通過したプリフォーム 10を、ホルダー力も取り出す。  The turret 21 is rotated by a motor (not shown) and continuously conveys a holder 210 connected to the chain conveyor 22. Then, the feeder 23 inserts the preform 10 into the empty holder 210 to be conveyed with the mouth 11 exposed, and passes through the heating regions 25 and 26 facing the discharger 24 force. Take out 10 holder power.
[0025] また、搬送手段 20は、図示してないが、公知のものを用いている。例えば、ホルダ 一 210にピニオンが設けられており、加熱領域 25, 26の所定位置にラックが設置さ れている。これにより、プリフォーム 10が加熱領域 25, 26を通過する際、ピニオンが ラックと嚙み合って回転するので、プリフォーム 10は、長手方向軸を中心に自転した 状態で搬送され、周方向に均一に加熱される。なお、 自転機構は、上記機構に限定 されるものではない。 [0025] Further, although not shown, the conveying means 20 is a known one. For example, the holder 210 is provided with a pinion, and racks are installed at predetermined positions in the heating areas 25 and 26. As a result, when the preform 10 passes through the heating regions 25 and 26, the pinion rotates in mesh with the rack, so that the preform 10 is conveyed while rotating around the longitudinal axis, and in the circumferential direction. Heated uniformly. The rotation mechanism is not limited to the above mechanism.
[0026] (ヒータユニット） [0026] (Heater unit)
図 2aは、本発明の実施形態に力かる飽和ポリエステル中空体の加熱結晶化装置 のヒータユニットを説明するための概略正面図を示している。  FIG. 2a is a schematic front view for explaining a heater unit of a saturated polyester hollow body heat crystallization apparatus according to an embodiment of the present invention.
また、図 2bは、図 2aの部分断面 A— Aを含むヒータユニットの概略側面図を示して いる。 図 2a, 2bにおいて、ヒータユニット 30は、細長い矩形箱状の筐体 33に、加熱ラン プとして棒状のハロゲンランプ 31と反射板 32を収納した構成としてあり、位置調整手 段 40によって支持されている。なお、各ヒータユニット 30a— 30fは、照光する位置が 異なっており、その他の構成は、ほぼ同一である。 FIG. 2b shows a schematic side view of the heater unit including the partial cross section AA of FIG. 2a. 2a and 2b, the heater unit 30 has a configuration in which a rod-shaped halogen lamp 31 and a reflector 32 are housed as a heating lamp in an elongated rectangular box-shaped housing 33, and is supported by a position adjusting means 40. Yes. Each heater unit 30a-30f has a different illumination position, and other configurations are almost the same.
また、「ハロゲンランプ」とは、封入ガスに不活性ガスおよび微量のハロゲン物質を 添加した赤外線電球をいい、本実施形態では、近赤外線を照射するハロゲンランプ 31を使用している。  The “halogen lamp” refers to an infrared bulb in which an inert gas and a trace amount of a halogen substance are added to a sealed gas. In the present embodiment, a halogen lamp 31 that irradiates near infrared rays is used.
なお、使用する加熱ランプは、ハロゲンランプ 31に限定されるものではなぐたとえ ば、光照射により加熱する一般的な赤外線ランプ等を使用することもできる。また、加 熱ランプは、棒状の形状に限定されるものではない。  The heating lamp to be used is not limited to the halogen lamp 31. For example, a general infrared lamp heated by light irradiation can be used. Further, the heating lamp is not limited to a rod shape.
[0027] 反射板 32は、図 2bに示すように、一定の焦点距離を有する湾曲状に形成されてお り、二次元的には、ハロゲンランプ 31から照射された照射光 9を反射して、 口部 11の 任意の F点（照光点）に集光する形状としてある。したがって、三次元的には、図 2aに 示すように、棒状のハロゲンランプ 31から照射された照射光 9を、線状に反射するこ とになる。 [0027] As shown in FIG. 2b, the reflector 32 is formed in a curved shape having a constant focal length, and reflects the irradiation light 9 emitted from the halogen lamp 31 in two dimensions. The shape is focused at any point F (lighting point) of the mouth 11. Therefore, in three dimensions, as shown in FIG. 2a, the irradiation light 9 emitted from the rod-shaped halogen lamp 31 is reflected linearly.
このようにすることにより、ヒータユニット 30は、ハロゲンランプ 31から照射される一 部の光を除いて、大部分の光を口部 11に照射することができ、エネルギー効率が改 善され消費電力を低減することができる。  In this way, the heater unit 30 can irradiate most of the light on the mouth 11 except for part of the light emitted from the halogen lamp 31, improving energy efficiency and power consumption. Can be reduced.
[0028] また、消費電力を低減することにより、たとえば、ヒータユニット 30を水冷しなくても すみ、構造を単純化することができ、設備費用のコストダウンを図ることができる。 さらに、照射光 9を口部 11に効率よく照射することにより、たとえば、熱風による加熱 をしなくてもすむので、構造をより単純化することができる。 [0028] Further, by reducing the power consumption, for example, the heater unit 30 does not need to be cooled with water, the structure can be simplified, and the equipment cost can be reduced. Furthermore, by efficiently irradiating the irradiation part 9 with the irradiation light 9, for example, it is not necessary to heat with hot air, so that the structure can be further simplified.
なお、図示してないが、反射板 32に冷却フィンを形成するとよぐこれにより、冷却 効率を向上させることができる。  Although not shown, it is possible to improve cooling efficiency by forming cooling fins on the reflector 32.
[0029] 筐体 33は、細長い四角柱状の形状としてあり、照射側の側面から反射板 32及びハ ロゲンランプ 31を収納する構造としてある。なお、筐体 33の形状は、本例に限定され るものではない。  [0029] The casing 33 has a shape of an elongated quadrangular prism, and has a structure that houses the reflector 32 and the halogen lamp 31 from the side surface on the irradiation side. The shape of the casing 33 is not limited to this example.
この筐体 33は、ハロゲンランプ 31の両端部を支持し、図示してないが、ハロゲンラ ンプ 31の電源ケーブル力 両端面から引き出される。 The housing 33 supports both ends of the halogen lamp 31 and is not shown in the figure. Power cable force of amplifier 31 Pulled out from both end faces.
[0030] 位置調整手段 40は、上方向に立設されたベース板 41と、ベース板 41に垂直方向 にスライド可能に支持された垂直方向移動板 42と、垂直方向移動板 42の垂直方向 の移動及び位置決めを行うボルト 43a及びロックナット 43bと、垂直方向移動板 42の 上部に、水平方向にスライド可能に支持された水平方向移動板 44と、水平方向移動 板 44の水平方向の移動及び位置決めを行うボルト 45a及びロックナット 45bと、水平 方向移動板 44に上下方向へ回動可能に取り付けられた筐体 33を支持する連結部 材 46と、連結部材 46の回動方向の位置決めを行うボルト 47aと力もなつている。これ により、ヒータユニット 30は、プリフォーム 10の口部 11に対して、水平及び垂直方向 の距離と、上下方向の照射角度を自在に調整することができる。  [0030] The position adjusting means 40 includes a base plate 41 standing upward, a vertical moving plate 42 supported by the base plate 41 so as to be slidable in the vertical direction, and the vertical moving plate 42 in the vertical direction. Bolts 43a and lock nuts 43b for movement and positioning, a horizontal movement plate 44 supported so as to be slidable in the horizontal direction above the vertical movement plate 42, and horizontal movement and positioning of the horizontal movement plate 44 Bolt 45a and lock nut 45b, a connecting member 46 that supports the casing 33 that is mounted on the horizontal movement plate 44 so as to be rotatable in the vertical direction, and a bolt that positions the connecting member 46 in the rotating direction. It has power with 47a. Thereby, the heater unit 30 can freely adjust the horizontal and vertical distances and the vertical irradiation angle with respect to the mouth portion 11 of the preform 10.
[0031] このように、ヒータユニット 30a— 30fは、上記構成の位置調整手段 40を備えており 、この位置調整手段 40により筐体 33と口部 11の位置関係を容易に設定することが でき、照射光 9を口部 11の所定位置に所定の光強度で照射することができる。また、 ヒータユニット 30a— 30fは、構造が単純化されるので、製造原価のコストダウンを図 ること力 Sできる。  Thus, the heater units 30a-30f include the position adjusting means 40 having the above-described configuration, and the position adjusting means 40 can easily set the positional relationship between the housing 33 and the mouth portion 11. The irradiation light 9 can be irradiated to a predetermined position of the mouth portion 11 with a predetermined light intensity. In addition, since the heater units 30a-30f have a simplified structure, the manufacturing cost can be reduced.
なお、位置調整手段 40は、上記構成に限定されるものではなぐ 口部 11の所定位 置に所定の光強度で集光させることにより、口部 1 1を加熱することが可能な機構であ ればよい。また、光強度の調整はヒータユニットの位置関係だけでなぐたとえば、ハ ロゲンランプ 31の電圧を制御してもよい。  The position adjusting means 40 is not limited to the above-described configuration. The position adjusting means 40 is a mechanism capable of heating the mouth portion 11 by condensing it at a predetermined position of the mouth portion 11 with a predetermined light intensity. Just do it. The light intensity is adjusted only by the positional relationship of the heater unit. For example, the voltage of the halogen lamp 31 may be controlled.
[0032] 加熱結晶化装置 1は、図 1に示すように、プリフォーム 10の搬送経路に沿った加熱 領域 25， 26に、ヒータユニット 30a— 30fを合計 8個並設してある。このようにすると、 プリフォーム 10の口部 11を、複数のヒータユニット 30a— 30fの前を連続して通過さ せることにより連続的に加熱することができ、 口部 11の連続結晶化が可能となり生産 効率を向上させることができる。 As shown in FIG. 1, the heating and crystallization apparatus 1 includes a total of eight heater units 30 a to 30 f arranged in parallel in heating regions 25 and 26 along the conveyance path of the preform 10. In this way, the mouth portion 11 of the preform 10 can be continuously heated by passing in front of the plurality of heater units 30a-30f, and the mouth portion 11 can be continuously crystallized. The production efficiency can be improved.
なお、本実施形態では、ヒータユニットの数を 8個として説明するが、これに限定さ れるものではない。また、右側のターレット 21の外周部にヒータユニットを配設してい ないが、この領域を加熱領域として利用することも可能であり、省スペース化を図るこ とがでさる。 [0033] また、加熱結晶化装置 1は、ヒータユニット 30a 30fによる照光する位置を異なら せた構成としてある。このようにすると、各ヒータユニット 30a 30fが、 口部 11の所定 の部分を加熱することができるので、 口部 11の各部分の結晶化度を精度よくかつ容 易に制御することができる。 In the present embodiment, the number of heater units is eight, but the present invention is not limited to this. Further, although no heater unit is provided on the outer peripheral portion of the right turret 21, it is possible to use this area as a heating area, thereby saving space. [0033] In addition, the heat crystallization apparatus 1 has a configuration in which the positions illuminated by the heater units 30a and 30f are different. In this way, each heater unit 30a 30f can heat a predetermined part of the mouth part 11, so that the degree of crystallinity of each part of the mouth part 11 can be controlled accurately and easily.
[0034] ここで、好ましくは、各ヒータユニット 30a 30fが、プリフォーム 10の口部 11の形状 ，肉厚及び光吸収率に起因する昇温特性に応じて、照射光 9を口部 11の所定位置 に所定の光強度で照射するとよぐこのようにすると、ほぼ均一な光強度の光を照射 しただけでは結晶化にむらが発生する口部 11に対して、昇温特性にもとづいて加熱 したいポイントを重点的に加熱できるので、より均一な結晶化を実現することができる 。また、部分的に結晶化度を異ならせたい場合には、結晶化度を精度よく制御するこ とが可能となり、所望する特性を得ることができる。  [0034] Here, preferably, each heater unit 30a 30f emits the irradiation light 9 of the mouth portion 11 according to the temperature rise characteristics resulting from the shape, thickness, and light absorption rate of the mouth portion 11 of the preform 10. By irradiating at a predetermined position with a predetermined light intensity, it is possible to heat the mouth 11 where unevenness in crystallization occurs only by irradiating light with a substantially uniform light intensity based on the temperature rise characteristics. Since the point to be heated can be intensively heated, more uniform crystallization can be realized. In addition, when it is desired to partially vary the crystallinity, the crystallinity can be controlled with high accuracy, and desired characteristics can be obtained.
[0035] また、「昇温特性」とは、口頸部に光を照射して加熱したとき、口頸部の各部の温度 上昇率をいう。たとえば、ペットボトルのプリフォーム 10は、 口部 11の上部にねじ山 1 3が形成され、中段部に段付き部 14が形成され、下部にネックリング 12が形成されて いる。このため、肉厚が厚い部分の昇温特性は小さくなり、温度が上昇しにくくなる。 また、結晶化前のプリフォーム 10は、無色透明であるのに対し、結晶化されると白 色に変化し光吸収率が変化する。このため、無色透明状態から白化した部分は、昇 温特性が大きくなり急激に温度上昇する、一方、白化した部分により照射光 9が遮ら れる部分は、照射光 9による昇温特性が急激に小さくなる。  [0035] The "temperature rise characteristic" refers to the rate of temperature rise of each part of the mouth and neck when the mouth and neck are heated by irradiation with light. For example, a plastic bottle preform 10 has a thread 13 formed at the upper part of the mouth part 11, a stepped part 14 formed at the middle step part, and a neck ring 12 formed at the lower part. For this reason, the temperature rise characteristic of the thick part becomes small, and the temperature does not easily rise. In addition, the preform 10 before crystallization is colorless and transparent, but when it is crystallized, it changes to white and the light absorption rate changes. For this reason, the whitened part from the colorless and transparent state has a large temperature rise characteristic and the temperature rises rapidly, while the part where the irradiated light 9 is blocked by the whitened part has a rapidly small temperature rise characteristic due to the irradiated light 9. Become.
すなわち、「昇温特性に応じて」とは、「昇温特性を考慮して、均一な結晶化を可能 とする照射条件にて」といった意味である。  In other words, “according to the temperature rise characteristics” means “under irradiation conditions that allow uniform crystallization in consideration of the temperature rise characteristics”.
[0036] 次に、各ヒータユニット 30a 30fの照射条件及び加熱結晶化装置 1の動作につい て、図面を参照して説明する。なお、本発明にかかる加熱結晶化装置の照射条件- 動作はこれに限定されるものではない。  Next, the irradiation conditions of the heater units 30a and 30f and the operation of the heat crystallization apparatus 1 will be described with reference to the drawings. The irradiation condition-operation of the heat crystallization apparatus according to the present invention is not limited to this.
[0037] (第一のヒータユニット）  [0037] (First heater unit)
まず、図 3aは、第一のヒータユニット 30aの照射状態を説明する概略側面図を示し ている。  First, FIG. 3a shows a schematic side view for explaining the irradiation state of the first heater unit 30a.
図 3aにおいて、第一のヒータユニット 30aは、照射光 9が、 口部 11の上部中央に集 光するように調整されている。すなわち、ヒータユニット 30aは、水平方向を向いた状 態で、 口部 11の上方かつ口部 11に接近した位置に設定されてレ、る。 In FIG. 3a, the first heater unit 30a has the irradiation light 9 collected at the upper center of the mouth 11. It is adjusted to light. That is, the heater unit 30a is set at a position above the mouth portion 11 and close to the mouth portion 11 in a state of facing the horizontal direction.
加熱結晶化装置 1は、ヒータユニット 30aから照射される照射光 9によって、 口部 11 を全体的に加熱するとともに、特に、 口部 11上方のねじ山 13を加熱する。  The heating and crystallization apparatus 1 heats the mouth 11 as a whole with the irradiation light 9 emitted from the heater unit 30a, and particularly heats the thread 13 above the mouth 11.
[0038] 次に、図 3bは、第二のヒータユニット 30bの照射状態を説明する概略側面図を示し ている。 Next, FIG. 3b shows a schematic side view for explaining the irradiation state of the second heater unit 30b.
図 3bにおいて、第二のヒータユニット 30bは、照射光 9が、口部 11の上部外周に集 光するように調整されている。すなわち、ヒータユニット 30bは、ヒータユニット 30aと比 ベて、 口部 11から水平方向に離れた位置に設定されてレ、る。  In FIG. 3 b, the second heater unit 30 b is adjusted so that the irradiation light 9 is collected on the upper outer periphery of the mouth portion 11. That is, the heater unit 30b is set at a position away from the mouth portion 11 in the horizontal direction as compared with the heater unit 30a.
加熱結晶化装置 1は、ヒータユニット 30bから照射される照射光 9によって、 口部 11 のねじ山 13を重点的に加熱し、結晶化させる。  The heating and crystallization apparatus 1 focuses and heats the thread 13 of the mouth 11 with the irradiation light 9 irradiated from the heater unit 30b to cause crystallization.
[0039] 次に、図 3cは、第三のヒータユニット 30cの照射状態を説明する概略側面図を示し ている。 Next, FIG. 3c shows a schematic side view for explaining the irradiation state of the third heater unit 30c.
図 3cにおいて、第三のヒータユニット 30cは、照射光 9が、 口部 11の中段部中央に 集光するように調整されている。すなわち、ヒータユニット 30cは、ヒータユニット 30bと 比べて、 口部 11から水平方向に接近し、かつ、下方に移動した位置に設定されてい る。  In FIG. 3c, the third heater unit 30c is adjusted so that the irradiation light 9 is condensed at the center of the middle part of the mouth part 11. That is, the heater unit 30c is set at a position that is closer to the horizontal direction from the mouth portion 11 and moved downward than the heater unit 30b.
加熱結晶化装置 1は、ヒータユニット 30cから照射される照射光 9によって、 口部 11 を全体的に加熱するとともに、特に、 口部 11の中段の段付き部 14を加熱する。  The heating and crystallization apparatus 1 heats the mouth part 11 as a whole by the irradiation light 9 emitted from the heater unit 30c, and particularly heats the stepped part 14 in the middle part of the mouth part 11.
[0040] 次に、図 3dは、第四のヒータユニット 30dの照射状態を説明する概略側面図を示し ている。 Next, FIG. 3d shows a schematic side view for explaining the irradiation state of the fourth heater unit 30d.
図 3dにおいて、第四のヒータユニット 30dは、照射光 9が、口部 11の中段部外周に 集光するように調整されている。すなわち、ヒータユニット 30dは、ヒータユニット 30cと 比べて、 口部 11から水平方向に離れた位置に設定されてレ、る。  In FIG. 3 d, the fourth heater unit 30 d is adjusted so that the irradiation light 9 is condensed on the outer periphery of the middle part of the mouth 11. In other words, the heater unit 30d is set at a position away from the mouth portion 11 in the horizontal direction as compared with the heater unit 30c.
加熱結晶化装置 1は、ヒータユニット 30dから照射される照射光 9によって、 口部 11 の段付き部 14を重点的に加熱し、結晶化させる。  The heating and crystallization apparatus 1 preferentially heats the stepped portion 14 of the mouth portion 11 with the irradiation light 9 emitted from the heater unit 30d to cause crystallization.
[0041] 次に、図 3eは、第五及び第六のヒータユニット 30eの照射状態を説明する概略側 面図を示している。 図 3eにおいて、第五及び第六のヒータユニット 30eは、照射光 9が、 口部 11の下段 部外周に斜め上方力も集光するように調整されている。すなわち、ヒータユニット 30e は、ヒータユニット 30dと比べて、 口部 11から水平方向に離れ、上方に移動し、かつ、 下方向に回動した位置に設定されている。 Next, FIG. 3e shows a schematic side view for explaining the irradiation state of the fifth and sixth heater units 30e. In FIG. 3e, the fifth and sixth heater units 30e are adjusted so that the irradiation light 9 also collects an obliquely upward force on the outer periphery of the lower part of the mouth part 11. That is, the heater unit 30e is set at a position that is separated from the mouth portion 11 in the horizontal direction, moved upward, and rotated downward as compared with the heater unit 30d.
加熱結晶化装置 1は、ヒータユニット 30eから照射される照射光 9によって、 口部 11の下段のネックリング 12を重点的に加熱し、結晶化させる。なお、ヒータュニ ット 30eは、二つ並設されている。  The heat crystallization apparatus 1 heats and crystallizes the lower neck ring 12 of the mouth part 11 with the irradiation light 9 emitted from the heater unit 30e. Two heater units 30e are arranged side by side.
[0042] 次に、図 3fは、第七及び第八のヒータユニット 30fの照射状態を説明する概略側面 図を示している。 Next, FIG. 3f shows a schematic side view for explaining the irradiation state of the seventh and eighth heater units 30f.
図 3fにおいて、第七及び第八のヒータユニット 30fは、照射光 9が、口部 11の下段 部中央に斜め上方力も集光するように調整されている。すなわち、ヒータユニット 30f は、ヒータユニット 30eと比べて、 口部 11から水平方向に接近した位置に設定されて いる。  In FIG. 3f, the seventh and eighth heater units 30f are adjusted so that the irradiation light 9 also collects an oblique upward force at the center of the lower part of the mouth part 11. That is, the heater unit 30f is set at a position closer to the horizontal direction from the mouth portion 11 than the heater unit 30e.
加熱結晶化装置 1は、ヒータユニット 30fから照射される照射光 9によって、口部 11 の上面及び外周面を全体的に加熱し、結晶化を促進させる。なお、ヒータユニット 30 fは、二つ並設されている。  The heat crystallization apparatus 1 heats the entire upper surface and outer peripheral surface of the mouth 11 with the irradiation light 9 emitted from the heater unit 30f, and promotes crystallization. Two heater units 30 f are arranged side by side.
[0043] このように、本実施形態の飽和ポリエステル中空体の加熱結晶化装置 1は、ハロゲ ンランプ 31から照射される光を集光することができるので、加熱対象である口部 11に 効率よく照射光 9を照射することができ、エネルギー効率を向上させることができる。 また、 口部 11の昇温特性に応じて、 口部 11の所定位置に所定の光強度の照射光 を照射するので、たとえば、肉厚が異なり、形状の複雑な口部 1 1に対しても、より均 一な結晶化を実現することができる。 [0043] As described above, the saturated polyester hollow body heat crystallization apparatus 1 of the present embodiment can collect the light emitted from the halogen lamp 31, and thus can efficiently be applied to the mouth portion 11 to be heated. Irradiation light 9 can be irradiated, and energy efficiency can be improved. Further, since irradiation light having a predetermined light intensity is irradiated to a predetermined position of the mouth portion 11 according to the temperature rise characteristic of the mouth portion 11, for example, for a mouth portion 11 having a different thickness and a complicated shape. However, more uniform crystallization can be realized.
さらに、プリフォーム 10を自転させながら、口部 11に照射光 9を照射することができ るので、周方向に均一な加熱を行うことができる。  Furthermore, since the mouth portion 11 can be irradiated with the irradiation light 9 while rotating the preform 10, uniform heating can be performed in the circumferential direction.
第一実施例  First embodiment
[0044] 次に、上記加熱結晶化装置 1の第一実施例について説明する。  Next, a first example of the heat crystallization apparatus 1 will be described.
本実施例では、加熱結晶化装置 1 (ヒータユニットの数は 20個）を使用して、プリフ オーム 10の口部 11を加熱し、 口部 11を結晶化させた。この際、加熱結晶化装置 1は 、照光する位置が水平及び垂直の両方向に変化するよう最適に設定されており、 口 部 11のほぼ全体を、平均結晶化度が約 35体積パーセントとなるように結晶化させた 。なお、プリフォームイニシャル温度は、約 35°Cであり、加熱時間は約 2分とした。 上記加熱結晶化装置 1は、ヒータユニット 30の消費電力の合計が 40KWであった。 これに対し、従来の加熱結晶化装置を使用して、ほぼ同様の条件で、口部 11を結晶 化させたところ、ヒータユニットの消費電力の合計は、 120KWであった。すなわち、 加熱結晶化装置 1は、ヒータユニット 30の消費電力を約 67%節電することができた。 第二実施例 In this example, the mouth portion 11 of the preform 10 was heated to crystallize the mouth portion 11 using the heat crystallization apparatus 1 (the number of heater units was 20). At this time, the heat crystallization apparatus 1 is The illumination position was optimally set so as to change both in the horizontal and vertical directions, and almost the entire mouth 11 was crystallized so that the average crystallinity was about 35 volume percent. The preform initial temperature was about 35 ° C and the heating time was about 2 minutes. In the heat crystallization apparatus 1, the total power consumption of the heater unit 30 was 40 KW. In contrast, when the mouth 11 was crystallized under the same conditions using a conventional heat crystallization apparatus, the total power consumption of the heater unit was 120 KW. In other words, the heat crystallization apparatus 1 was able to save about 67% of the power consumption of the heater unit 30. Second embodiment
[0045] 次に、上記加熱結晶化装置 1の第二実施例について説明する。  Next, a second embodiment of the heat crystallization apparatus 1 will be described.
本実施例では、照光する位置が水平方向に変化するよう最適に設定された、加熱 結晶化装置 1を使用して、プリフォーム 10の口部 11を加熱し、口部 11を結晶化させ た。なお、その他の条件は、第一実施例とほぼ同様とした。  In this example, the mouth portion 11 of the preform 10 was heated and the mouth portion 11 was crystallized by using the heating and crystallization apparatus 1 that was optimally set so that the illuminating position changed in the horizontal direction. . The other conditions were almost the same as in the first example.
上記加熱結晶化装置 1は、ヒータユニット 30の消費電力の合計が 45KWであった。 すなわち、加熱結晶化装置 1は、ヒータユニット 30の消費電力を約 63%節電すること ができた。  In the heat crystallization apparatus 1, the total power consumption of the heater unit 30 was 45 KW. In other words, the heat crystallization apparatus 1 was able to save about 63% of the power consumption of the heater unit 30.
また、本実施例の加熱結晶化装置 1は、照光する位置が水平方向に変化するよう 最適に設定されたが、この構成に限定されるものではなぐたとえば、照光する位置 を垂直方向に変化するように設定した構成としてもょレ、。  Further, the heating and crystallization apparatus 1 of the present embodiment is optimally set so that the illumination position changes in the horizontal direction, but is not limited to this configuration. For example, the illumination position changes in the vertical direction. As a configuration set up like this.
[0046] [飽和ポリエステル中空体の加熱方法] [0046] [Method of heating saturated polyester hollow body]
本実施形態の加熱方法は、プリフォーム 10を自転させながら、ヒータユニット 30か らの照射光 9を、プリフォーム 10の口部 11に照射して加熱することにより、 口部 11を 結晶化させる飽和ポリエステル中空体の加熱方法であって、ヒータユニット 30からの 光を、 口部 11の所定位置に所定の光強度で集光させることにより、 口部 11を加熱す る方法としてある。  In the heating method of the present embodiment, the mouth 11 is crystallized by irradiating and heating the irradiation light 9 from the heater unit 30 to the mouth 11 of the preform 10 while rotating the preform 10. This is a heating method for a saturated polyester hollow body, in which the light from the heater unit 30 is condensed at a predetermined position of the mouth portion 11 with a predetermined light intensity to heat the mouth portion 11.
[0047] このように、ハロゲンランプ 31から照射された光を口部 11に集光することにより、口 部 11に入射しない光を低減することができるので、エネルギー効率を改善することが でき、消費電力を低減することができる。  [0047] As described above, by condensing the light emitted from the halogen lamp 31 to the mouth portion 11, light that is not incident on the mouth portion 11 can be reduced, so that energy efficiency can be improved. Power consumption can be reduced.
また、 口部 11に対する焦点距離を調整することにより、光強度を調整することがで きる。すなわち、照射光 9の照射面積が小さくなるように焦点距離を調整すると、光強 度が強くなり、逆に、照射面積が大きくなるように焦点距離を調整すると、光強度が弱 くなる。このようにして、 口部 11の所定位置における光強度を容易に調節することが でき、加熱エネルギーを精度よく制御することができる。 It is also possible to adjust the light intensity by adjusting the focal length with respect to the mouth 11. wear. That is, if the focal length is adjusted so that the irradiation area of the irradiation light 9 is reduced, the light intensity is increased. Conversely, if the focal length is adjusted so that the irradiation area is increased, the light intensity is reduced. In this way, the light intensity at a predetermined position of the mouth portion 11 can be easily adjusted, and the heating energy can be accurately controlled.
[0048] また、一般的に、複雑な形状， 肉厚が異なる又は光吸収率が異なる口部 11は、各 部における昇温特性が異なる。たとえば、太陽光のように均一な光強度の光により加 熱される場合、肉厚が厚い部分は、熱源に近い部分が昇温しやすぐ熱源から離れ るほど昇温しにくくなる。  [0048] In general, the mouth portion 11 having a complicated shape, a different thickness, or a different light absorptivity has different temperature rise characteristics in each portion. For example, when heated by light of uniform light intensity, such as sunlight, the thicker part becomes more difficult to heat up as the part close to the heat source heats up or immediately leaves the heat source.
このように、加熱条件が安定しないと、結晶化が不十分な部分は、機械的強度が低 くなり、また、結晶化が進みすぎた部分は、もろくなり変形することから、より均一に結 晶化させることが要求される。  As described above, if the heating conditions are not stable, the portion where the crystallization is insufficient has a low mechanical strength, and the portion where the crystallization has progressed too much becomes brittle and deforms. It is required to crystallize.
[0049] このため、 口部 11の各部における昇温特性に応じて、各部に照射する光の光強度 を制御するとよぐこのようにすると、たとえば、複雑な形状の口部 11に対しても、各 部の温度プロファイルを合わせることができるので、均一に結晶化させることができる たとえば、熱源に対して、手前の部分が白化すると、光が遮られた後方の部分は、 熱伝導により昇温することとなり、昇温特性が小さくなる。このような場合には、光が遮 られないように、まず、後方の部分に集光の焦点距離を合わせて、後方から手前に 向かって徐々に加熱するとよい。  [0049] For this reason, according to the temperature rise characteristics of each part of the mouth part 11, the light intensity of the light irradiated to each part is controlled. In this way, for example, even for the mouth part 11 having a complicated shape. Because the temperature profile of each part can be matched, it can be uniformly crystallized.For example, when the front part is whitened against the heat source, the rear part where light is blocked rises in temperature due to heat conduction. As a result, the temperature rise characteristic is reduced. In such a case, first, the focal length of the light collection should be adjusted to the rear part and heated gradually from the rear to the front so that the light is not blocked.
[0050] また、好ましくは、口部 11の光が届きにくい部分に、光を優先的に集光させるとよく 、これにより、 口部 11が加熱により白色化又は変色して光吸収率が変化する場合に 、光吸収率の変化に応じて又はこの変化を利用して、効率よく加熱することができる。  [0050] Preferably, the light is preferentially condensed on a portion of the mouth portion 11 where the light is difficult to reach, whereby the mouth portion 11 is whitened or discolored by heating and the light absorption rate is changed. In this case, the heating can be efficiently performed according to the change in the light absorption rate or using the change.
[0051] さらに、好ましくは、上述したように、集光手段として一定の焦点距離を有する反射 板 32を用い、ハロゲンランプ 31及び反射板 32の設置位置及び/又は設置方向を 調整する方法とするとよぐこのようにすると、照射光 9を口部 11の所定位置に所定の 光強度で容易に照射することができる。  [0051] Further, preferably, as described above, the reflector 32 having a fixed focal length is used as the light collecting means, and the installation position and / or orientation of the halogen lamp 31 and the reflector 32 is adjusted. If it does in this way, the irradiation light 9 can be easily irradiated to the predetermined position of the mouth part 11 with predetermined light intensity.
[0052] 以上、本発明の飽和ポリエステル中空体の加熱結晶化装置及びその加熱方法に ついて、好ましい実施形態を示して説明したが、本発明は、上述した実施形態にの み限定されるものではなぐ本発明の範囲で種々の変更実施が可能であることは言う までもない。 As described above, the heating and crystallization apparatus for saturated polyester hollow body and the heating method thereof according to the present invention have been described with reference to the preferred embodiments, but the present invention is not limited to the above-described embodiments. Needless to say, various modifications can be made without departing from the scope of the present invention.
たとえば、上記実施形態の加熱結晶化装置 1は、プリフォーム 10の口部 11の形状 に応じて、ヒータユニット 30a 30fを設定した力 上記設定に限定されるものではな く、ヒータユニット 30a, 30bとヒータユニット 30c， 30dを人れ替免たり、各ヒータュニッ トの数を増減したりすることも可能である。  For example, the heating and crystallization apparatus 1 of the above embodiment is not limited to the force set by the heater units 30a and 30f according to the shape of the mouth portion 11 of the preform 10, and is not limited to the above settings. The heater units 30c and 30d can be replaced or the number of heater units can be increased or decreased.
産業上の利用可能性 Industrial applicability
本発明の飽和ポリエステル中空体の加熱結晶化装置及びその加熱方法は、加熱 対象が、ペットボトルのプリフォーム 10の口部 11に限定されるものではなぐたとえば 、ペットボトノレ以外の容器等の口頸部に対しても好適に利用することができる。  The heating and crystallization apparatus for a saturated polyester hollow body of the present invention and the heating method thereof are not limited to the mouth 11 of the preform 10 of the PET bottle. For example, the mouth and neck of containers other than PET bottles It can be suitably used for the part.

Claims

請求の範囲 The scope of the claims
[1] 飽和ポリエステル中空体の口頸部に、前記飽和ポリエステル中空体を自転させた 状態で、ヒータユニットからの光を照射して加熱することにより、前記口頸部を結晶化 させる飽和ポリエステル中空体の加熱結晶化装置であって、  [1] A saturated polyester hollow body that crystallizes the mouth and neck by irradiating and heating light from a heater unit while the saturated polyester hollow body is rotated in the mouth and neck of the saturated polyester hollow body. A body heat crystallization apparatus comprising:
前記ヒータユニットが、  The heater unit is
加熱ランプと、  A heating lamp,
この加熱ランプから照射された光を集光させる集光手段と、  Condensing means for condensing the light emitted from the heating lamp;
前記集光手段から照射された光を前記口頸部の所定位置に所定の光強度で照射 する照射光制御手段と  Irradiation light control means for irradiating the light irradiated from the condensing means to a predetermined position of the mouth and neck with a predetermined light intensity;
を具備したことを特徴とする飽和ポリエステル中空体の加熱結晶化装置。  An apparatus for heating and crystallizing a saturated polyester hollow body, comprising:
[2] 前記ヒータユニットが、前記口頸部の形状，肉厚及び光吸収率に起因する昇温特 性に応じて、前記光を照射する構成としたことを特徴とする請求項 1記載の飽和ポリ エステル中空体の加熱結晶化装置。  [2] The configuration according to claim 1, wherein the heater unit is configured to irradiate the light according to a temperature rise characteristic caused by a shape, a thickness, and a light absorption rate of the mouth and neck. Heat crystallization equipment for saturated polyester hollow body.
[3] 前記集光手段を一定の焦点距離を有する反射板とし、かつ、前記照射光制御手段 を、前記加熱ランプ及び集光手段の設置位置及び Z又は設置方向を調整可能な位 置調整手段としたことを特徴とする請求項 1又は 2記載の飽和ポリエステル中空体の 加熱結晶化装置。  [3] The light collecting means is a reflector having a fixed focal length, and the irradiation light control means is a position adjusting means capable of adjusting the installation position and Z or the installation direction of the heating lamp and the light collecting means. The apparatus for heating and crystallizing a saturated polyester hollow body according to claim 1 or 2, wherein:
[4] 前記ヒータユニットを、前記飽和ポリエステル中空体の搬送経路に沿って、複数個 並設したことを特徴とする請求項 1一 3のいずれかに記載の飽和ポリエステル中空体 の加熱結晶化装置。  [4] The heating crystallization apparatus for a saturated polyester hollow body according to any one of claims 1 to 3, wherein a plurality of the heater units are arranged side by side along a conveying path of the saturated polyester hollow body. .
[5] 前記複数のヒータユニットの照光する位置を、水平方向及び垂直方向に異ならせ たことを特徴とする請求項 4記載の飽和ポリエステル中空体の加熱結晶化装置。  5. The apparatus for heating and crystallizing a saturated polyester hollow body according to claim 4, wherein the illumination positions of the plurality of heater units are varied in the horizontal direction and the vertical direction.
[6] 飽和ポリエステル中空体の口頸部に、前記飽和ポリエステル中空体を自転させた 状態で、ヒータユニットからの光を照射して加熱することにより、前記口頸部を結晶化 させる飽和ポリエステル中空体の加熱方法であって、 [6] A saturated polyester hollow body that crystallizes the mouth and neck by irradiating and heating light from a heater unit while the saturated polyester hollow body is rotated in the mouth and neck of the saturated polyester hollow body. A method of heating the body,
前記ヒータユニットからの光を、前記口頸部の所定位置に所定の光強度で集光さ せることにより、前記口頸部を加熱することを特徴とする飽和ポリエステル中空体の加 熱方法。 A heating method for a saturated polyester hollow body, wherein the mouth and neck are heated by condensing light from the heater unit at a predetermined position of the mouth and neck with a predetermined light intensity.
[7] 前記口頸部の形状， 肉厚及び光吸収率に起因する昇温特性に応じて、前記光を 照射することを特徴とする請求項 6記載の飽和ポリエステル中空体の加熱方法。 7. The method for heating a saturated polyester hollow body according to claim 6, wherein the light is irradiated in accordance with a temperature rise characteristic caused by the shape, thickness and light absorption rate of the neck and neck.
[8] 前記口頸部の軸中心に近い部分に集光の焦点を合わせ、次に、該焦点より手前の 部分に焦点を合わせて加熱することを特徴とする請求項 6又は 7記載の飽和ポリエス テル中空体の加熱方法。  [8] The saturation according to claim 6 or 7, wherein focusing is performed on a portion near the axial center of the mouth and neck, and then heating is performed by focusing on a portion in front of the focal point. Heating method for polyester hollow body.
[9] 前記口頸部のネックリング部に集光の焦点を合わせて加熱することを特徴とする請 求項 6 8のいずれかに記載の飽和ポリエステル中空体の加熱方法。  [9] The heating method for a saturated polyester hollow body according to any one of claims 68, wherein the condensing is focused on the neck ring portion of the mouth-neck portion for heating.
PCT/JP2004/010709 2004-07-28 2004-07-28 Thermal crystallization system of saturated polyester hollow body and its heating method WO2006011201A1 (en)

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