CN110539428A - Preparation method of rubber sealing element and vulcanization mold thereof - Google Patents
Preparation method of rubber sealing element and vulcanization mold thereof Download PDFInfo
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- CN110539428A CN110539428A CN201910978337.2A CN201910978337A CN110539428A CN 110539428 A CN110539428 A CN 110539428A CN 201910978337 A CN201910978337 A CN 201910978337A CN 110539428 A CN110539428 A CN 110539428A
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
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- 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
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
the invention discloses a preparation method of a rubber sealing element and a vulcanization mold thereof, and relates to the field of mechanical equipment sealing elements. The invention comprises a mould, which comprises a strip-shaped seal vulcanization mould, a core mould strip vulcanization mould, a strip-shaped seal arc vulcanization mould, a core mould arc vulcanization mould and a gas nozzle installation vulcanization mould; the problem of processing deformation of a large-size die is solved; the invention also comprises a preparation method of the rubber sealing element, which utilizes the combined mould to carry out sectional vulcanization on the mixed rubber material, and finally carries out vulcanization joint, thereby realizing the purpose of preparing the large sealing ring with the circumference size of tens of meters.
Description
Technical Field
The invention relates to the field of mechanical equipment sealing elements.
Background
the inflatable sealing element (ring) is a ring-shaped rubber product consisting of a hollow rubber strip with a special-shaped section and an inflating nozzle, and when the inside of the air bag is inflated through the inflating nozzle, the section of the air bag expands and deforms, so that the sealing effect is achieved.
however, the existing sealing ring vulcanizing mould has a plurality of defects, for example, when the perimeter size of the sealing ring is large, the deformation problem in the processing process of the vulcanizing mould is difficult to avoid, so that the mould is not tightly closed; for another example, a seal with an oversized perimeter would need to be equipped with correspondingly larger curing equipment.
disclosure of Invention
The invention aims to provide a vulcanization mould of a rubber sealing element, which aims to solve the problem of processing deformation of a large-size mould;
meanwhile, the invention also provides a preparation method of the rubber sealing element, so as to realize the purpose of preparing a large sealing ring with the circumference size of tens of meters.
In order to solve the problems, the invention adopts the following technical means:
a mold comprises a strip-shaped seal vulcanization mold, a core mold strip vulcanization mold, a strip-shaped seal arc vulcanization mold, a core mold arc vulcanization mold and a gas nozzle installation vulcanization mold;
strip-shaped die cavities with two through ends are arranged in the strip-shaped sealing strip vulcanizing die and the strip-shaped core die vulcanizing die;
The inner parts of the seal arc-shaped vulcanizing mold and the core mold arc-shaped vulcanizing mold are both provided with arc-shaped mold cavities with two through ends;
the strip-shaped mold cavity is also arranged in the air faucet mounting vulcanization mold, an air faucet mounting channel for mounting a metal air faucet is arranged on the side wall of the air faucet mounting vulcanization mold, and the air faucet mounting channel is communicated with the strip-shaped mold cavity.
the strip seal strip-shaped vulcanizing mold and the core mold strip-shaped vulcanizing mold both comprise a first upper pressing plate and a first lower pressing plate which are used for forming the strip mold cavity, and mold opening grooves are formed in the bottom surface of the first upper pressing plate and/or the two sides of the top surface of the first lower pressing plate.
the sectional area of the strip-shaped die cavity in the core die strip-shaped vulcanizing die is smaller than that of the strip-shaped die cavity in the seal strip-shaped vulcanizing die.
The seal arc-shaped vulcanizing mold and the core mold arc-shaped vulcanizing mold both comprise a second upper pressing plate and a second lower pressing plate which are used for forming the arc-shaped mold cavity, and mold opening grooves are formed in the bottom surface of the second upper pressing plate and/or the two sides of the top surface of the second lower pressing plate.
the sectional area of the arc-shaped die cavity in the core die arc-shaped vulcanizing die is smaller than that of the arc-shaped die cavity in the seal strip arc-shaped vulcanizing die.
Air cock installation vulcanization mould utensil is including being used for forming the third top board and the third holding down plate of bar die cavity, the bottom surface of third top board and/or the top surface of third holding down plate is provided with inlays the passageway and is used for dismantling the installation mosaic block, air cock installation passageway sets up on the mosaic block.
the mold provided by the invention has the following beneficial effects in the use process:
1) inflatable seals are generally characterized by small cross-sectional dimensions and large perimeter dimensions. For the inflatable sealing element with the diameter of more than 2 meters or the circumference of more than 10 meters, the problem of mold processing deformation is always a problem which cannot be solved, and the invention adopts a set of mold with smaller size to carry out multiple vulcanization on the sealing element, thereby avoiding the difficulty in mold processing;
2) the manufacturing of the sealing elements with the same section shape and size and different perimeter sizes can be finished by adopting a set of dies; secondly, the traditional mold is used for vulcanization, a plurality of vulcanization molds need to be designed and processed according to the perimeter size of the sealing element, so that the manufacturing cost is greatly increased, and the group of molds related by the invention can lower the manufacturing cost on the product preparation;
3) When the mold provided by the invention is used for vulcanization, large sealing rings with different perimeter sizes and different shapes can be vulcanized by using one set of mold through different combination and matching modes.
A method for producing a rubber seal member using the mold according to any one of claims 1 to 6, comprising the steps of:
(1) Selecting a corresponding mould;
(2) Designing a sealing element structure;
(3) rubber vulcanization is carried out by adopting the following steps:
a. Extruding the core mold rubber material for molding, and extruding the sealing strip rubber material into a tubular rubber blank; preparing a film at the same time;
b. b, filling the core mold rubber material in the step a into the core mold strip-shaped vulcanizing mold or the core mold arc-shaped vulcanizing mold for segmented vulcanization;
c. B, inserting the vulcanized rubber core mold in the step b into the tubular rubber blank extruded in the step a, and simultaneously bonding a metal air nozzle on the outer wall of the tubular rubber blank to enable the metal air nozzle to be communicated with the inner cavity of the tubular rubber blank;
d. c, filling the semi-finished rubber strip product prepared in the step c into a sealing strip-shaped vulcanization mold, performing segmented vulcanization, and when the semi-finished rubber strip product is vulcanized to a position where a metal air nozzle is arranged, arranging the air nozzle on the vulcanization mold for vulcanization;
e. Extracting a rubber core mold in the vulcanized rubber strip by utilizing compressed air;
f. e, shearing the two ends of the vulcanized rubber strip prepared in the step e, inserting a section of rubber core mold, attaching the two ends of the vulcanized rubber strip, and placing the attached part into a seal arc vulcanization mold for vulcanization;
g. And opening the die by using the die opening groove, and taking out a finished product.
further, the length of the rubber core mold inserted in the step f is 300-400 mm.
Furthermore, the two ends of the vulcanized rubber strip attached in the step f are firstly bonded by an adhesive and then wrapped by the rubber sheet.
By adopting the preparation method disclosed by the invention, the purpose of preparing a large sealing ring with the circumference size of tens of meters can be realized by utilizing the group of moulds, and under the condition that the circumference sizes of the sealing elements to be prepared are different, a plurality of vulcanizing moulds do not need to be processed according to the bearing size of the sealing elements.
drawings
FIG. 1 is a schematic structural view of a strip-shaped curing mold for sealing strips according to the present invention.
Fig. 2 is a core mold strip-shaped vulcanizing mold of the invention.
FIG. 3 is a schematic top view of the seal arc vulcanization mold of the present invention.
FIG. 4 is a front view of the seal arc vulcanization mold of the present invention.
Fig. 5 is a schematic top view showing the structure of the core mold arc-shaped vulcanizing mold of the present invention.
Fig. 6 is a schematic front view showing the structure of the core mold arc-shaped vulcanizing mold of the present invention. 7.2
FIG. 7 is a schematic view of the installation structure of the air nozzle installation vulcanization mold of the present invention.
Fig. 8 is a partially enlarged structural view of a portion a in fig. 7.
FIG. 9 is a schematic view of the construction of the down press vulcanizer of the present invention.
Fig. 10 is a schematic structural view of a hot press vulcanization part in fig. 9.
Wherein, 1-seal strip-shaped vulcanizing mold, 2-core mold strip-shaped vulcanizing mold, 3-seal arc-shaped vulcanizing mold, 4-core mold arc-shaped vulcanizing mold, 5-air nozzle installation vulcanizing mold, 51-air nozzle installation channel, 52-embedding part, 53-third lower press plate, 54-third strip-shaped vulcanizing tank, 55-fourth strip-shaped vulcanizing tank, 56-third outer convex block, 57-embedding block, 6-strip-shaped mold cavity, 7-arc-shaped mold cavity, 8-first upper press plate, 9-first lower press plate, 10-first strip-shaped vulcanizing tank, 11-second strip-shaped vulcanizing tank, 12-first outer convex block, 13-die opening tank, 14-second upper press plate, 15-second lower press plate, 16-first arc-shaped vulcanizing tank, 17-second arc-shaped vulcanizing tank, 18-second outer bump, 19-lower hot plate, 20-upper hot plate, 21-bracket, 22-support rod, 23-mould, 24-rubber strip, 241-unvulcanized rubber strip, 242-vulcanized rubber strip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
referring to fig. 1 to 8, a mold includes a seal strip-shaped vulcanizing mold 1, a core mold strip-shaped vulcanizing mold 2, a seal arc-shaped vulcanizing mold 3, a core mold arc-shaped vulcanizing mold 4, and a nozzle installation vulcanizing mold 5;
the strip-shaped sealing strip vulcanizing mould 1 and the core mould strip vulcanizing mould 2 are internally provided with strip-shaped mould cavities 6 with two through ends;
the inner parts of the seal arc vulcanizing mould 3 and the core arc vulcanizing mould 4 are provided with arc mould cavities 7 with two through ends;
the strip-shaped die cavity 6 is also arranged in the air tap mounting vulcanization die 5, an air tap mounting channel 51 for mounting a metal air tap is arranged on the side wall of the air tap mounting vulcanization die, and the air tap mounting channel 51 is communicated with the strip-shaped die cavity 6.
further, the seal strip-shaped vulcanization mold 1 and the core mold strip-shaped vulcanization mold 2 both comprise a first upper pressing plate 8 and a first lower pressing plate 9 for forming the strip-shaped mold cavity 6, the bottom surface of the first upper pressing plate 8 and the top surface of the first lower pressing plate 9 are respectively provided with a first strip-shaped vulcanization groove 10 and a second strip-shaped vulcanization groove 11 for forming the strip-shaped mold cavity 6, a first outer protrusion 12 is arranged in the second strip-shaped vulcanization groove 11 along the extending direction of the second strip-shaped vulcanization groove to form a first strip-shaped groove and a second strip-shaped groove which are communicated with each other at two ends in the second strip-shaped vulcanization groove 11, so that the section of the strip-shaped mold cavity is in a concave shape, and mold opening grooves 13 are arranged on the bottom surface of the first upper pressing plate 8 and/or on two sides of the.
the sectional area of the strip-shaped mold cavity 6 in the core mold strip-shaped vulcanizing mold 2 is smaller than the sectional area of the strip-shaped mold cavity 6 in the seal strip-shaped vulcanizing mold 1.
and the seal arc vulcanization mold 3 and the core mold arc vulcanization mold 4 both comprise a second upper pressing plate 14 and a second lower pressing plate 15 which are used for forming the arc mold cavity 7, the bottom surface of the second upper pressing plate 14 and the top surface of the second lower pressing plate 15 are respectively provided with a first arc vulcanization groove 16 and a second arc vulcanization groove 17 which are used for forming the arc mold cavity 7, a second outer convex block 18 is arranged in the second arc vulcanization groove 17 along the extending direction of the second outer convex block to enable a first arc groove and a second arc groove which are communicated with each other at two ends to be formed in the second arc vulcanization groove 17, and the mold opening grooves 13 are arranged on the bottom surface of the second upper pressing plate 14 and/or two sides of the top surface of the second lower pressing plate 15.
The sectional area of the arc-shaped die cavity 7 in the core die arc-shaped vulcanizing die 4 is smaller than that of the arc-shaped die cavity 7 in the seal strip arc-shaped vulcanizing die 3.
air cock installation vulcanization mould utensil 5 is including being used for forming the third top board 52 and the third holding down plate 53 of bar die cavity 6, the bottom surface of third top board 52 with the top surface of third holding down plate 53 is provided with the formation respectively the third bar vulcanization groove 54 and the fourth vulcanization groove 55 of bar die cavity 6, it makes to be provided with the outer lug 56 of third along its extending direction in the fourth vulcanization groove 55 of fourth shape form third bar recess and the fourth bar recess that both ends link up in the vulcanization groove 55 of fourth shape, the bottom surface of third top board 52 and/or the top surface of third holding down plate 53 is provided with inlays the passageway and is used for dismantling installation mosaic block 57, air cock installation passageway 51 sets up on mosaic block 57.
in this embodiment, the inflatable seal is generally characterized by a small cross-sectional dimension and a large perimeter dimension. For the inflatable sealing element with the diameter of more than 2 meters or the circumference of more than 10 meters, the problem of mold processing deformation is always a problem which cannot be solved, and the invention adopts a set of mold with smaller size to carry out multiple vulcanization on the sealing element, thereby avoiding the difficulty in mold processing; the manufacturing of the sealing elements with the same section shape and size and different perimeter sizes can be finished by adopting a set of dies; secondly, the traditional mold is used for vulcanization, a plurality of vulcanization molds need to be designed and processed according to the perimeter size of the sealing element, so that the manufacturing cost is greatly increased, and the group of molds related by the invention can lower the manufacturing cost on the product preparation; when the mold provided by the invention is used for vulcanization, large sealing rings with different perimeter sizes and different shapes can be vulcanized by using one set of mold through different combination and matching modes.
In the process of using the mold, the following steps are adopted to prepare the rubber:
Selecting a mould firstly, and if the finished product is a circular sealing element, adopting a sealing strip arc-shaped vulcanizing mould 3 and a core mould arc-shaped vulcanizing mould 4; when the finished product is rectangular, a ring-sleeved mold is selected for vulcanization preparation. The preparation steps are as follows:
a. the core die is molded and vulcanized by using the rubber compound for the core die by a core die vulcanizing die (a core die arc vulcanizing die 4 or a core die strip vulcanizing die 2 can be used as well) to prepare a core die rubber material with the length larger than the perimeter of the sealing element, the rubber core die material has good heat resistance and ageing resistance, the material hardness is 75-85 degrees, and ethylene propylene diene monomer is generally used as the rubber compound for preparing the core die.
b. Extruding the rubber compound for the sealing element into a tubular rubber blank by adopting an extruder, wherein the rubber compound for the sealing element adopts common natural rubber and styrene butadiene rubber, and the mixture ratio of the natural rubber to the styrene butadiene rubber is as follows: the thickness of the rubber blank is equal to the design wall thickness of the sealing element, the length of the rubber blank is larger than the perimeter of the sealing element, and the inner diameter of the rubber blank is equal to the outer perimeter of the section of the rubber core mould divided by 3.14;
c. and (c) penetrating the vulcanized rubber core mold in the step (a) into the extruded rubber blank in the step (b), sealing one end, vacuumizing from the other end to enable the rubber blank to be tightly attached to the surface of the rubber core mold, placing the rubber core mold in a straight state, and standing the rubber core mold at room temperature for 12-18 hours.
d. Measuring the length of each side of the rectangular sealing element (ring), forming an inflating nozzle at a specified air nozzle part, inserting a metal air nozzle into an air nozzle mounting passage 51 on the air nozzle mounting vulcanization mold 5, and vulcanizing by using the positioning of the metal air nozzle;
e. And (2) putting the semi-finished product of the sealing element with the connected air tap into a sealing strip vulcanizing mould (a sealing strip vulcanizing mould 1 and a sealing strip arc vulcanizing mould 3) for segmented vulcanization, wherein the segmented vulcanization refers to the vulcanization by utilizing the sealing strip arc vulcanizing mould 3 and the sealing strip vulcanizing mould 1, the rubber strip is vulcanized in a segment-by-segment manner until the perimeter of the sealing element is reached, the length of a straight line part is planned in the vulcanization process, and after the length of the straight line part is reached, the arc bending part is emptied. And in the segmented vulcanization process, the molds with two ends exposed outside the hot plate are cooled, so that incomplete vulcanization or over vulcanization of the sealing element at the part is avoided.
f. and (3) demolding, namely extracting the rubber core mold from the interior of the vulcanized semi-finished product to form a concave cavity in the vulcanized semi-finished product rubber material.
g. And measuring the length of the straight line part, cutting the straight line part from the unvulcanized part, penetrating the straight line part into an arc vulcanizing mold (a seal arc vulcanizing mold 3), and connecting the two straight lines by using the arc vulcanizing mold, thus completing the vulcanization of the four round angle parts, namely completing the vulcanization of the whole sealing element.
in the embodiment, the manufacturing of the sealing elements with the same section shape and size and different perimeter sizes can be completed by adopting one set of die; in the traditional inflation vulcanization method, a plurality of vulcanization molds need to be designed and processed according to the perimeter size of the sealing element.
The invention can prepare large sealing rings with the perimeter size of tens of meters by adopting a set of mould and a vulcanizing machine, and the traditional inflation vulcanization method is difficult to realize.
The mold of the invention has low manufacturing cost, while the mold manufacturing cost of the traditional inflation vulcanization method is very high.
Meanwhile, the mold is beneficial to serialization, namely the mold can be suitable for vulcanizing more rubber sealing elements with different specifications.
meanwhile, as shown in fig. 9, in this embodiment, the adopted vulcanizer is an alligator type plate vulcanizer, the length of the hot plate of the vulcanizer is 1-5 m, and the width of the hot plate is 200 and 400mm, in order to ensure a smooth transition between each two sections of sealing strips, the length of the vulcanizing mold should be about 200mm greater than that of the hot plate of the vulcanizer, so that the two ends of the mold 23 extend out of the hot plates to perform a natural cooling function. Because the length of the vulcanized sealing strip is larger, the vulcanizing machine used by the invention is of an upper pressure type, namely the lower hot plate 19 of the vulcanizing machine is fixed, and the upper hot plate moves up and down. When the length of the mold 23 is greater than 2 m, the mold 23 can be fixed on the hot plate by a mechanical method (bolt fixation) to reduce the mold unloading strength of an operator.
Example 2
As shown in fig. 1 to 10, in this embodiment, an inflatable sealing ring with a diameter of 8.92 meters is provided for a certain equipment connecting flange, and the basic performance requirements of the sealing ring are as follows:
inflation working pressure 0.5Mpa
The maximum sealing gap is 5 mm;
Inner diameter of seal ring mounting groove is 8956mm
Outer diameter of mounting groove of sealing ring is 8908mm
The circumference of the center line of the sealing ring is 28008 mm;
Working temperature normal temperature
the working environment is indoor.
When the common pneumatic vulcanization is adopted, a vulcanization mold with the outer edge diameter of 9.2 meters needs to be designed and processed, and a large-sized vulcanizing tank or a large-sized flat vulcanizing machine with the diameter of more than 10 meters needs to be equipped. The preparation steps when the invention is adopted are as follows:
1) Mold selection
Because of flange sealing, the sealing ring is in a large circular ring shape and has no local small circular arc bending section, only a seal arc vulcanizing mold 3, a core mold arc vulcanizing mold 4 and an air tap installation vulcanizing mold 5 are needed.
2) sealing element structure
because the inflation working pressure of the sealing element reaches 0.5Mpa, the sealing element needs to be reinforced by fabric, and the sealing element is designed to be composed of an inner rubber layer, a fabric reinforcing layer, an outer rubber layer, an inflation nozzle and the like. The thickness of the inner rubber layer is 1.5mm, and the thickness of the reinforced layer is 0.6 mm; the thickness of the outer rubber layer is 0.4mm, and the reinforcing layer fabric: nylon knitted fabric.
3) Preparation procedure
A. Extruding the core mold rubber material into the shape of the section of the core mold by using an extruder, and extruding the sealing strip rubber material into a tubular rubber blank with the inner diameter of 19mm and the thickness of 1.5mm, wherein the cutting length of the rubber blank is 28 +/-0.1 meter; calendering the sealing strip rubber material into a rubber sheet with the thickness of 0.45mm and the width of 90 +/-5 mm by using a calender;
B. Filling a core mold adhesive tape into a core mold vulcanizing mold, and vulcanizing in sections, wherein the core mold length is 28500 +/-100;
C. soaking the rubber strip rubber material in solvent gasoline to obtain rubber paste with a ratio of 1:1.5, and coating the rubber paste on nylon knitted fabric to obtain a rubber cloth;
D. Cutting the rubberized fabric into strips with the width of 85 +/-5 mm according to the angle of 45 degrees, and splicing the lengths of the rubberized fabric strips to 27.8 +/-0.1 meters;
E. Penetrating the rubber core mold prepared in the step B into the tubular rubber blank prepared in the step A, sealing one end of the rubber core mold, vacuumizing the other end of the rubber core mold to attach the rubber blank to the surface of the rubber core mold, and attaching the metal air nozzle and the rubber bonding part to a specified position (generally about 300mm away from the end part) of the shaped pipe blank after sand blasting, cleaning and coating an adhesive;
F. Wrapping the rubberized fabric strip prepared in the step D on the outer surface of the semi-finished product prepared in the step E along the length direction, wrapping the rubber sheet prepared in the step A on the outer surface of the rubberized fabric layer, and standing for 2 hours;
G. And (4) putting the semi-finished rubber strip prepared in the step (F) into a mold (23), carrying out sectional vulcanization according to the vulcanization method shown in the figure 10 until the required length is reached, adjusting the length when the air nozzle part is vulcanized, putting the air nozzle part into an air nozzle mounting vulcanization mold (5), and vulcanizing the air nozzle part. The vulcanization condition is noted to be 150 ℃, the time is 25min, the unvulcanized part is fully cooled before each drawing, otherwise, the unvulcanized joint part is rotten and cracked;
H. The vulcanized rubber core mold in the rubber strip is extracted by compressed air, and the length of the rubber strip is cut to 2760mm (considering that the sealing ring has certain extension during assembly, the cutting length is smaller than the theoretical circumference);
I. Shearing two ends of a vulcanized rubber strip, stripping an outer rubber layer and a reinforcing layer, taking a rubber core mold with the length of about 350mm, inserting the rubber core mold into the vulcanized rubber strip to enable two ends of the rubber strip to be attached together, coating a formed adhesive, wrapping a butt joint part by using a rubber sheet with the thickness of 0.2-0.3mm, wrapping by using a rubberized fabric strip, paying attention to the fact that the rubberized fabric strip is overlapped by 5-10mm, and finally wrapping an outer rubber layer rubber sheet;
J. And (3) placing the butt joint part in the step I into a seal arc vulcanization mold, vulcanizing at 150 ℃ for 25min, opening the mold, and taking out a vulcanized finished product.
K. And packaging and warehousing the vulcanized finished product after the vulcanized finished product is qualified.
although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (9)
1. A mold, characterized in that: comprises a strip-shaped seal vulcanization mould (1), a core mould strip vulcanization mould (2), a strip-shaped seal arc vulcanization mould (3), a core mould arc vulcanization mould (4) and an air nozzle installation vulcanization mould (5);
Strip-shaped die cavities (6) with two through ends are arranged in the strip-shaped sealing strip vulcanizing die (1) and the strip-shaped core die vulcanizing die (2);
the inner parts of the seal arc-shaped vulcanizing mould (3) and the core arc-shaped vulcanizing mould (4) are respectively provided with an arc-shaped mould cavity (7) with two through ends;
The air tap installation vulcanizing mold is characterized in that the strip-shaped mold cavity (6) is also arranged in the air tap installation vulcanizing mold (5), an air tap installation channel (51) for installing a metal air tap is arranged on the side wall of the air tap installation vulcanizing mold, and the air tap installation channel (51) is communicated with the strip-shaped mold cavity (6).
2. the mold of claim 1, wherein: the seal strip-shaped vulcanizing mold (1) and the core mold strip-shaped vulcanizing mold (2) both comprise a first upper pressing plate (8) and a first lower pressing plate (9) which are used for forming the strip mold cavity (6), and mold opening grooves (13) are formed in the bottom surface of the first upper pressing plate (8) and/or the two sides of the top surface of the first lower pressing plate (9).
3. The mold of claim 1, wherein: the sectional area of the strip-shaped die cavity (6) in the core die strip-shaped vulcanizing die (2) is smaller than that of the strip-shaped die cavity (6) in the seal strip-shaped vulcanizing die (1).
4. the mold of claim 1, wherein: the seal arc-shaped vulcanizing mold (3) and the core mold arc-shaped vulcanizing mold (4) both comprise a second upper pressing plate (14) and a second lower pressing plate (15) which are used for forming the arc-shaped mold cavity (7), and mold opening grooves (13) are formed in the bottom surface of the second upper pressing plate (14) and/or the two sides of the top surface of the second lower pressing plate (15).
5. The mold of claim 1, wherein: the sectional area of the arc-shaped die cavity (7) in the core die arc-shaped vulcanizing die (4) is smaller than that of the arc-shaped die cavity (7) in the seal strip arc-shaped vulcanizing die (3).
6. the mold of claim 1, wherein: air cock installation vulcanization mould utensil (5) is including being used for forming third top board (52) and third holding down plate (53) of bar die cavity (6), the bottom surface of third top board (52) and/or the top surface of third holding down plate (53) is provided with inlays the passageway and is used for dismantling installation mosaic block (57), air cock installation passageway (51) set up on mosaic block (57).
7. a preparation method of a rubber sealing element is characterized by comprising the following steps: preparation with a mould according to any one of claims 1 to 6, comprising the following steps:
(1) selecting a corresponding mould;
(2) Designing a sealing element structure;
(3) Rubber vulcanization is carried out by adopting the following steps:
a. Extruding the core mold rubber material for molding, and extruding the sealing strip rubber material into a tubular rubber blank; preparing a film at the same time;
b. b, filling the core mold rubber material in the step a into the core mold strip-shaped vulcanizing mold (2) or the core mold arc-shaped vulcanizing mold (4) for segmented vulcanization;
c. B, inserting the vulcanized rubber core mold in the step b into the tubular rubber blank extruded in the step a, and simultaneously bonding a metal air nozzle on the outer wall of the tubular rubber blank to enable the metal air nozzle to be communicated with the inner cavity of the tubular rubber blank;
d. C, filling the semi-finished rubber strip product prepared in the step c into a sealing strip-shaped vulcanization mold (1), performing segmented vulcanization, and when the semi-finished rubber strip product is vulcanized to a position where a metal air nozzle is installed, installing a vulcanization mold (5) with the air nozzle for vulcanization;
e. Extracting a rubber core mold in the vulcanized rubber strip by utilizing compressed air;
f. E, shearing the two ends of the vulcanized rubber strip prepared in the step e, inserting a section of rubber core mold, attaching the two ends of the vulcanized rubber strip, and placing the attached part into a seal arc vulcanization mold (3) for vulcanization;
g. And opening the die by using the die opening groove (13) and taking out a finished product.
8. The method for producing a rubber seal according to claim 7, wherein: the length of the rubber core mold inserted in the step f is 300-400 mm.
9. The method for producing a rubber seal according to claim 7, wherein: and f, adhering two ends of the vulcanized rubber strip attached in the step f by using a bonding agent, and then wrapping the rubber strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978337.2A CN110539428B (en) | 2019-10-15 | 2019-10-15 | Preparation method of rubber sealing element and vulcanization mold thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978337.2A CN110539428B (en) | 2019-10-15 | 2019-10-15 | Preparation method of rubber sealing element and vulcanization mold thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110539428A true CN110539428A (en) | 2019-12-06 |
| CN110539428B CN110539428B (en) | 2022-08-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086251A (en) * | 2019-12-16 | 2020-05-01 | 河北莫申科技有限公司 | Integral vulcanization production process for inflatable sealing ring |
| CN111853240A (en) * | 2020-07-28 | 2020-10-30 | 陕西裕华永赫航宇科技有限公司 | Sealing shroud ring for flexible plate sealing of wind tunnel jet pipe section and preparation method thereof |
| CN113580429A (en) * | 2021-07-27 | 2021-11-02 | 南通世睿电力科技有限公司 | Mold and process for continuously molding and vulcanizing special-shaped double-layer cloth-sandwiched rubber product |
| CN114953278A (en) * | 2022-05-16 | 2022-08-30 | 广东东晟密封科技有限公司 | Sealing washer adapter ring forming die structure |
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| CN111086251A (en) * | 2019-12-16 | 2020-05-01 | 河北莫申科技有限公司 | Integral vulcanization production process for inflatable sealing ring |
| CN111853240A (en) * | 2020-07-28 | 2020-10-30 | 陕西裕华永赫航宇科技有限公司 | Sealing shroud ring for flexible plate sealing of wind tunnel jet pipe section and preparation method thereof |
| CN113580429A (en) * | 2021-07-27 | 2021-11-02 | 南通世睿电力科技有限公司 | Mold and process for continuously molding and vulcanizing special-shaped double-layer cloth-sandwiched rubber product |
| CN114953278A (en) * | 2022-05-16 | 2022-08-30 | 广东东晟密封科技有限公司 | Sealing washer adapter ring forming die structure |
| CN114953278B (en) * | 2022-05-16 | 2023-10-27 | 广东东晟密封科技有限公司 | Sealing washer connects circle forming die structure |
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| CN110539428B (en) | 2022-08-30 |
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