WO2006048588A1 - Method of producing tokens for the thermoforming of containers and tokens thus obtained - Google Patents
Method of producing tokens for the thermoforming of containers and tokens thus obtained Download PDFInfo
- Publication number
- WO2006048588A1 WO2006048588A1 PCT/FR2005/050931 FR2005050931W WO2006048588A1 WO 2006048588 A1 WO2006048588 A1 WO 2006048588A1 FR 2005050931 W FR2005050931 W FR 2005050931W WO 2006048588 A1 WO2006048588 A1 WO 2006048588A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- tokens
- chips
- machined
- token
- Prior art date
Links
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
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
-
- 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
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/02—Combined thermoforming and manufacture of the preform
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
-
- 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
- B29K2105/255—Blocks or tablets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
Definitions
- the present invention relates to a method of manufacturing tokens for the production of containers by thermoforming said tokens, in which method the chips are cut in a plate of thermoplastic material.
- thermoforming containers from thermoformable chips. Indeed, this allows in particular to avoid or greatly limit the waste that exists when using a continuous strip of thermoplastic material.
- thermoforming in order to achieve an appropriate thermoforming, giving the container the desired wall thickness (generally a substantially constant thickness is sought), to thermoform from tokens, initially having a constant thickness and a straight edge, but to conform the edge of these tokens appropriately by a stamping operation prior to thermoforming.
- desired wall thickness generally a substantially constant thickness is sought
- thermoform from tokens, initially having a constant thickness and a straight edge, but to conform the edge of these tokens appropriately by a stamping operation prior to thermoforming.
- the applicant company has found that a particular conformation of the edge of the chips is necessary to obtain, by thermo ⁇ forming, containers having the desired shape, especially on their edges.
- This conformation depends on the thermoforming conditions, and in particular the shape of the containers.
- the object of the invention is to propose a process for manufacturing thermoformable tokens, which makes it possible to confer on these tokens a particular conformation contour, before their use for thermoforming.
- This object is achieved by the fact that the contours of said tokens are machined according to a determined profile, using a machining tool of the strawberry type.
- the machining makes it possible to choose the outline of the tokens appropriately, taking into account the particularities of the thermoforming, and in particular the shape of the containers.
- To modify the shape of the tokens it is enough to slightly modify the machining tool and / or its control mode. This operation is industrially less cumbersome than that which would involve modifying a stamping tool for such tokens.
- the chips have homogeneous structures, which correspond to that of the plate.
- tokens obtained by injection whose structure is particular around the injection point or points, they can therefore adopt a homogeneous behavior during thermoforming.
- at least part of the cutting of the chips is made in the plate by machining the contours of said tokens in the plate.
- the chips are machined on the plate until the chips are separated from the plate.
- the chips are machined on the plate until said tokens remain attached to the plate by breakable webs and the tokens are separated from the plate by breaking these webs.
- the whole of the plate comprising the "pre-machined" tokens can be handled as a whole, it is then sufficient to detach the chips from the plate, for example by pushing them back perpendicularly to the latter. in order to break the breakable sails, to obtain separate tokens.
- a finishing operation such as deburring the edges of the chips can be performed after this separation. This, however, will not be generally necessary since the thermoforming operations may reduce or cancel the very slight irregularities of edges due to breakage of breakable sails.
- chips are machined so that they have a thick central portion and a thinner periphery.
- a multilayer plate having at least one layer of thermoplastic base material which extends from the face of the plate in which the chips are machined, on a thickness such that said layer is present on the entire machined surface of the chips, and at least one additional layer.
- multilayer plate makes it possible to simply produce tokens themselves multilayer, comprising, in addition to a thermoplastic base material, one or more layers having for example specific colors or specific compositions allowing them to form barriers, for example light or gas.
- the plate is produced by extrusion.
- It can be a simple extrusion or a coextrusion, in the case where the plate is multilayer.
- the invention also relates to a token for producing parts by thermoforming.
- the aim of the invention is to overcome the drawbacks related to the necessity of the mastering step identified by the application WO 03/018294, by proposing a token whose edge has an outline having a determined profile, even before the operation of thermoforming. This goal is achieved by the fact that the token is cut from a plate of thermoplastic material and has a contour machined to a specific profile.
- FIG. 1 is a diagrammatic view of a plant for manufacturing, by extrusion, plates from which the tokens of the invention can be obtained;
- FIG. 2 illustrates a possibility for obtaining a thermal stabilization of these plates
- FIG. 5 shows a plate after machining, in section in the direction of the thickness of the plate; and FIG. 6 shows an example of conformation for a token according to the invention.
- Figure 1 shows an extrusion die 10 for extrusion manufacturing a continuous board 12, from which plates 14 are cut.
- a cutting tool 16 is shown schematically, it being understood that it is actually shaped so as to be able to cut the plates without breaking the continuity of the extrusion process.
- the plates being supported by conveyors 18, the tool 16 is able to move on a slight stroke in the direction F of advancement of these conveyors, during the cutting itself.
- the plate may be monolayer or multilayer and, by way of example, there are shown two hoppers 20, 22, from which two different thermoplastic materials can be successively introduced into the extrusion die for, in this case, by coextrusion a bilayer plate.
- the chips are cut from a plate of thermoplastic material 14 and their edges are machined using a machining tool.
- the chips are machined and cut while the plate 14 is thermally stable. This avoids deformation of the token after machining and cutting, which could change its size and / or shape.
- the thermal stabilization of the extruded plates can be obtained by any known means, before or after the cutting of the plates 14 from the continuous panel 12.
- FIG. 2 illustrates a possible means.
- a plate 14 shown in section parallel to its thickness is held on appropriate means, for example a plurality of suction cups or the like 26 belonging to a device of the "vacuum plate” type and located according to the locations. in which the tokens will be when they are cut into the plate.
- appropriate means for example a plurality of suction cups or the like 26 belonging to a device of the "vacuum plate” type and located according to the locations. in which the tokens will be when they are cut into the plate.
- the machining tool 28 shown in FIG. 3 is a bell mill having a plurality of machining teeth 28A.
- To machine a token in the plate it moves the machining tool 28 verti ⁇ calation, in Y on the appropriate distance, while driving the milling rotation.
- the drive means 30 of this mill in rotation and in the Y direction, are symbolized in FIG. 3, as are the control means 32 of these drive means.
- These means can be of any type known per se.
- the manufacturing device may comprise a plurality of cutters of the type of the cutter 28 of FIG. 3, which are controlled simultaneously in their rotational displacement about their respective axes and in Y. In FIG.
- the tool used to machining the chips from the plate 14 is a profiling cutter 34, whose movements can be controlled along the three axes X, Y, Z, this cutter being driven by appropriate drive means 36, themselves controlled by appropriate control means 38.
- the cutter 34 moves according to the contour of the chip it is machining.
- FIG. 5 shows, in section parallel to its thickness, the appearance of the plate 14 after the machining which has just been described. It can be seen that the machining that has been carried out in the plate has been continued until the tokens 1 remain attached to the plate by breakable sails 2. This makes it possible, on the one hand, to prevent the one or more machining tools do not interfere with the means that support the plate during its machining (for example the suction cups 26 connected to a suction box) and, secondly, to manipulate the plate and its pre-cut tokens as a whole after this machining.
- the contours of the chips were machined directly on the plate, while at the same time realizing at least part of their cutting. It is also conceivable to separate the chips from a plate by a simple punching operation, and then machine the tokens again.
- the IA edges of the chips have a specific profile, adapted so that, by thermoforming these tokens, containers of the desired shape are obtained, and having a wall of suitable thickness, that is to say a thickness sufficient on the entire wall, and suitably homogeneous.
- Thermoforming is effected, in a manner known per se, by pushing the thermoplastic material into a thermoforming chamber, using a thermoforming piston.
- the thermoplastic material is thus stretched and pressed against the contours of the thermo ⁇ forming chamber. Stretching concerns first and foremost the central region of the chips, which is why it is interesting that the machining of the latter is done in such a way that, like the token 1 of FIG. IC thick core and a thinner IP edge.
- the token is a piece of revolution (which is however not necessarily the case if it is made by a cutter of the type of the cutter 34 of Figure 4) and the periphery IP is therefore in the form of a flange centered on the axis A of the token.
- the thickness of this central portion is preferably the initial thickness of the plate 14, the chips being then only machined in the region of their IA contours.
- the junction zone IJ between the thick central portion IC and the thin peripheral portion IP may be parallel to the axis A or, as shown, be tapered, for example having the shape of a truncated cone.
- the transitions T between the different inclined areas of the token surface are preferably slightly rounded, with appropriate curvatures.
- the token of Figure 6 is multilayer. It comprises in fact, considered from its upper face S from which it is machined, a layer of CI base thermoplastic material and two additional layers, namely an intermediate layer C2 and a lower outer layer C3.
- This token is indeed made from a multilayer plate, for example obtained by coextrusion. In this case, two additional layers are represented.
- the token advantageously comprises at least one additional layer, but it may have 2, 3 or more.
- the layer C1 may be PS polystyrene or polypropylene PP.
- At least one of the additional layers may be a light barrier layer and / or a barrier layer to a gas and in particular oxygen.
- the token may have an intermediate layer in
- Black PS barrier to ultraviolet rays, and / or an intermediate layer of EVOH (ethylene-vinyl-alcohol), barrier to gas.
- EVOH ethylene-vinyl-alcohol
- the first-mentioned layer being the base thermoplastic material layer Cl
- PS white / PS black / PS white PS / EVOH / PS
- PS / EVOH / PE polyethylene
- PS white / PS black / EVOH / PS white PS white / PS black / PS white / EVOH / PE.
- the binder layers possibly present between the adjacent layers are not indicated above.
- the multilayer structure of the chips is such that all the layers C1, C2, C3 of the latter are present in the thickness of the token, substantially in any section of the latter.
- the thickness E of the layer C1 thermoplas ⁇ basic material is such that the machining does not remove this layer on a significant surface of the token outline. It can be seen that a given thickness of this layer remains even on the thin periphery of the chip. At most in the edge area of the token, if this edge is very light- inclined relative to the axis A, this layer C1 can locally miss.
- the distribution of the layers, and their thickness, as well as the contour profile IA of the token are such that all the layers are present in any zone of the thermoformed container.
- the profile of the token contour presents successively, considered from the central region IC, the inclined junction zone IJ and a flat zone connected by the upper surface of the periphery IP, then the edge IB of the chip.
- This edge can be inclined or parallel to the axis A.
- the token is pushed from its lower face I which according to whether the thermoforming is operated upwards or downwards, is oriented downwards as shown, or on the contrary upwards, and in the central region IC.
- This allows to avoid additional layers 1 Cl C3, which are thinner in this region than the Cl layer are locally removed due to stretching.
- the fact of making the tokens from a plate makes it possible to obtain a homogeneous distribution of the material in these tokens, this material having been heated homogeneously during the manufacture of the plate, in particular by extrusion.
- the behavior of the token is homogeneous and rebuses are avoided.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005300367A AU2005300367A1 (en) | 2004-11-05 | 2005-11-07 | Method of producing tokens for the thermoforming of containers and tokens thus obtained |
EP05819337A EP1809455A1 (en) | 2004-11-05 | 2005-11-07 | Method of producing tokens for the thermoforming of containers and tokens thus obtained |
RU2007116344/12A RU2007116344A (en) | 2004-11-05 | 2005-11-07 | METHOD FOR PREPARING A PREPARATION IN THE FORM OF A TOKEN FOR THERMAL FORMING OF A CAPACITY AND A PREPARATION OBTAINED BY THIS METHOD |
MX2007005472A MX2007005472A (en) | 2004-11-05 | 2005-11-07 | Method of producing tokens for the thermoforming of containers and tokens thus obtained. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0411797A FR2881674A1 (en) | 2004-11-05 | 2004-11-05 | Production of tokens for making containers by thermoforming, comprises a cutter-type machining tool using a determined profile |
FR0411797 | 2004-11-05 | ||
FR0412506A FR2881675B1 (en) | 2004-11-05 | 2004-11-25 | METHOD FOR MANUFACTURING THERMOPLASTIC TOKENS BY MACHINING AN EXTRUDED SHEET |
FR0412506 | 2004-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006048588A1 true WO2006048588A1 (en) | 2006-05-11 |
Family
ID=35874532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2005/050931 WO2006048588A1 (en) | 2004-11-05 | 2005-11-07 | Method of producing tokens for the thermoforming of containers and tokens thus obtained |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1809455A1 (en) |
AU (1) | AU2005300367A1 (en) |
FR (1) | FR2881675B1 (en) |
MX (1) | MX2007005472A (en) |
RU (1) | RU2007116344A (en) |
WO (1) | WO2006048588A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1779463B1 (en) * | 1968-08-14 | 1972-03-09 | Thiel Alfons W | PROCESS FOR PRODUCING SHAPED PARTS FROM A STRIP OF THERMOPLASTIC PLASTIC AND DEVICE FOR CARRYING OUT THE PROCESS |
US4419319A (en) | 1981-08-10 | 1983-12-06 | Ball Corporation | Preform structure |
US4419412A (en) | 1980-12-16 | 1983-12-06 | Ball Corporation | Plastic blank structure |
US4921646A (en) | 1988-08-31 | 1990-05-01 | Shell Oil Company | Forming laminated billets from individual billets |
WO2003018294A1 (en) | 2001-08-23 | 2003-03-06 | Erca Formseal | Method and device for thermoforming of containers |
-
2004
- 2004-11-25 FR FR0412506A patent/FR2881675B1/en not_active Expired - Fee Related
-
2005
- 2005-11-07 WO PCT/FR2005/050931 patent/WO2006048588A1/en active Application Filing
- 2005-11-07 EP EP05819337A patent/EP1809455A1/en not_active Withdrawn
- 2005-11-07 AU AU2005300367A patent/AU2005300367A1/en not_active Abandoned
- 2005-11-07 MX MX2007005472A patent/MX2007005472A/en active IP Right Grant
- 2005-11-07 RU RU2007116344/12A patent/RU2007116344A/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1779463B1 (en) * | 1968-08-14 | 1972-03-09 | Thiel Alfons W | PROCESS FOR PRODUCING SHAPED PARTS FROM A STRIP OF THERMOPLASTIC PLASTIC AND DEVICE FOR CARRYING OUT THE PROCESS |
US4419412A (en) | 1980-12-16 | 1983-12-06 | Ball Corporation | Plastic blank structure |
US4419319A (en) | 1981-08-10 | 1983-12-06 | Ball Corporation | Preform structure |
US4921646A (en) | 1988-08-31 | 1990-05-01 | Shell Oil Company | Forming laminated billets from individual billets |
WO2003018294A1 (en) | 2001-08-23 | 2003-03-06 | Erca Formseal | Method and device for thermoforming of containers |
Also Published As
Publication number | Publication date |
---|---|
FR2881675B1 (en) | 2009-04-24 |
AU2005300367A1 (en) | 2006-05-11 |
EP1809455A1 (en) | 2007-07-25 |
FR2881675A1 (en) | 2006-08-11 |
MX2007005472A (en) | 2007-05-24 |
RU2007116344A (en) | 2008-12-10 |
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