CN204136390U - A kind of multi-layer co-extruded mould of PVDC with temperature adjustment function - Google Patents
A kind of multi-layer co-extruded mould of PVDC with temperature adjustment function Download PDFInfo
- Publication number
- CN204136390U CN204136390U CN201420485652.4U CN201420485652U CN204136390U CN 204136390 U CN204136390 U CN 204136390U CN 201420485652 U CN201420485652 U CN 201420485652U CN 204136390 U CN204136390 U CN 204136390U
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- pvdc
- layer
- runner
- extruding
- stem
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Classifications
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
- B29C48/3363—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a layered die, e.g. stacked discs
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a kind of multi-layer co-extruded mould of PVDC with temperature adjustment function, has multiple annular or taper stem stem, and described stem stem periphery arranges multilayer for extruding the mold layer of different materials; The runner extruding outlet from molten thermoplastic entrance to annular is set in described mold layer; PVDC extruding layer arranges multiple runner be connected with extruder, and multiple runner forms helical form form in center.The utility model has the advantages that: the runner design adopting multiple entry, the raw material of PVDC each extruder in forming process is made just to complete shaping in 1/2-1/3 to circumference, thus substantially reduce the heated time of PVDC, make PVDC shaping through PVDC runner again from entering extruder plasticizing, required time within 3 minutes, thus makes PVDC part is moved with PA part that (220 DEG C of high temperature) is shaping is accomplished.PVDC is achieved through major diameter runner mold is shaping, therefore adopt this kind of runner to achieve PVDC co-extrusion film that folding footpath is 2000mm; In addition, set temperature regulating course, meets the processing temperature requirement of different materials.
Description
Technical field
The utility model relates to mechanical field, is a kind of multi-layer co-extruded mould specifically.
Background technology
The basic function of any blown film extrusion die is all one or more melt is flow in mould and one or more melt stream described is uniformly distributed into single annular concentric melt stream as far as possible at mould outlet place.Chinese Patent Application No. 201280035639.2, applicant Plastika Kritis S.A. describes a kind of concentric co-extrusion die and extrudes the method for multilayer thermoplastic film, and the method does not consider that heat time and temperature are on the impact of PVDC properties of materials.
The multi-layer co-extruded obstruct oriented film of PVDC, it is the new packaging material that is barrier layer with high-barrier PVDC, utilize co-extrusion mode, the material such as PVDC, PE, EVA, PP (polypropylene), PA organically can be combined, performance complement, becomes the high-barrier packaging material that a kind of combination property is splendid.
PVDC, formal name used at school is " polyvinylidene chloride ", and it is a kind of nonpoisonous and tasteless, safe and reliable high barrier material, except the general performance with plastics, also has the feature such as oil resistivity, corrosion resistance, can be widely used in the industries such as packaging for foodstuff.
The PhilipKwok of Dow Chemical company, the JosephDooley of SteveJenkins and Bin Dun engineering company discloses following content in its paper " new technology of processing high-barrier PVDC ": PVDC can bear the heat time of 6-8 minute within the scope of 150-170 DEG C, and when 210-220 DEG C, bear deficiency of time 30 seconds; And the co-extrusion material heating-up temperature of the application is: PE:160-170 DEG C; EVA:160-180 DEG C; PA binding agent is at 200 DEG C, and PA will ensure that its levelability is minimum also shaping at 220 DEG C.Therefore, the design of co-extruding mould must consider heating temperature and the heated time problem of different materials.
Utility model content
For solving the problems of the technologies described above, the method of the utility model employing technical scheme is: make PVDC shorten at low-temperature zone work flow as far as possible, namely heated time shortens, ensure that the ability that it bears PA section high temperature in vertical shaft section is strengthened, simultaneously, set temperature regulating course in mold layer, as oil temperature regulating course, air adjustment ganglionic layer.
Concrete technical scheme is as follows:
Have the multi-layer co-extruded mould of PVDC of temperature adjustment function, have multiple annular or taper stem stem, described stem stem periphery arranges multilayer for extruding the mold layer of different materials; The runner extruding outlet from molten thermoplastic entrance to annular is set in described mold layer; It is characterized in that: PVDC extruding layer arranges multiple runner be connected with extruder, multiple runner forms helical form form in center; Described mould comprises the mold layer arranged from bottom to top and is followed successively by internal layer PE layer, EVA/PVDC/EVA layer, middle PE layer, air heat-insulation layer, PA adhesive layer, PA layer and outlet die cavity; Be provided with oily temperature control layer in described EVA/PVDC/EVA layer, regulated and controled by oil temperature, still stablize when guaranteeing upper and lower 50 DEG C of difference temperature difference and ensure that PVDC, EVA chunk is at 150 DEG C.
The runner of described PE, EVA, PA, PA binding agent, takes one-to-two, two point four, and the labyrinth type of four point eight is without dead angle runner.
The utility model has the advantages that: take to use the plasticizing of multiple stage PVDC extruder, PVDC is heated evenly, thermal history will shorten greatly compared with a large-scale PVDC extruder, adopt the runner design of multiple entry, the raw material of PVDC each extruder in forming process is made just to complete shaping in 1/2-1/3 to circumference, thus substantially reduce the heated time of PVDC, make PVDC shaping through PVDC runner again from entering extruder plasticizing, required time within 3 minutes, thus makes PVDC part is moved with PA part that (220 DEG C of high temperature) is shaping is accomplished.PVDC is achieved through major diameter runner mold is shaping, therefore adopt this kind of runner to achieve PVDC co-extrusion film that folding footpath is 2000mm; In addition, set temperature regulating course, meets the processing temperature requirement of different materials.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the runner schematic diagram of PVDC mold layer.
Detailed description of the invention
Illustrate the utility model below in conjunction with accompanying drawing, as Figure 1-Figure 2, the utility model has multiple annular or taper stem stem, and the present embodiment is stem stem 1, stem stem 22 and stem stem 33, and described stem stem periphery arranges the extrusion die layer of multiple layers of different materials; The runner extruding outlet from molten thermoplastic from entrance to annular is set in described mold layer; PVDC layer 203 adopts the runner 2031 of multiple entry to design, and 3 runners 2031 form helical form form in center; The raw material of PVDC each extruder in forming process is made just to complete shaping in 1/3 to circumference.Also the passage of other quantity can be adopted, as 2,4 etc., specifically can according to settings such as the thickness of film, the numbers of plies.
Mould described in the present embodiment comprises the mold layer arranged from bottom to top and is followed successively by 101-104 tetra-formation internal layer PE layer; 201-206 six forms EVA/PVDC/EVA layer; 301-303 tri-forms middle PE layer; 401 1 form air heat-insulation layer; 501 1 form PA adhesive layer; 601-602 bis-forms PA layer; 701 1 form outlet die cavity.Various different material, in respective flat superimposed flow road, forms the uniform circular bed of material centripetal flow of thickness, successively fits in the shaft, move from bottom to top, finally form sandwich construction, extruded by upper outlet, then be film through inflation cooling forming.
The runner of described PE, PP, EVA, PA, PA binding agent, according to different flow requirement, take one-to-two, two point four, the labyrinth type of four point eight is without dead angle runner.
Arranging 401 1 objects forming air heat-insulation layer is the temperature of adjacent levels mould completely cut off, to adapt to the processing temperature of different materials.
Same reason, is provided with oily temperature control layer 202,205, is regulated and controled by oil temperature in described EVA/PVDC/EVA layer 201-206, still stablizes and ensure that PVDC, EVA chunk is at 150 DEG C when guaranteeing upper and lower 50 DEG C of difference temperature difference.
Other structures of mould of the present utility model can adopt universal architecture, similar disclosed in concrete and Chinese Patent Application No. 201280035639.2, then this, repeat no more.
Claims (1)
1. have the multi-layer co-extruded mould of PVDC of temperature adjustment function, have multiple annular or taper stem stem, described stem stem periphery arranges multilayer for extruding the mold layer of different materials; The runner extruding outlet from molten thermoplastic entrance to annular is set in described mold layer; It is characterized in that: PVDC extruding layer arranges multiple runner be connected with extruder, multiple runner forms helical form form in center; Described mould comprises the mold layer arranged from bottom to top and is followed successively by internal layer PE layer, EVA/PVDC/EVA layer, middle PE layer, air heat-insulation layer, PA adhesive layer, PA layer and outlet die cavity; Oily temperature control layer is provided with in described EVA/PVDC/EVA layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420485652.4U CN204136390U (en) | 2014-08-26 | 2014-08-26 | A kind of multi-layer co-extruded mould of PVDC with temperature adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420485652.4U CN204136390U (en) | 2014-08-26 | 2014-08-26 | A kind of multi-layer co-extruded mould of PVDC with temperature adjustment function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204136390U true CN204136390U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420485652.4U Active CN204136390U (en) | 2014-08-26 | 2014-08-26 | A kind of multi-layer co-extruded mould of PVDC with temperature adjustment function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437511A (en) * | 2014-08-26 | 2016-03-30 | 丹东全德高科技包装有限公司 | A PVDC multi-layer co-extrusion mold with a temperature adjusting function |
-
2014
- 2014-08-26 CN CN201420485652.4U patent/CN204136390U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437511A (en) * | 2014-08-26 | 2016-03-30 | 丹东全德高科技包装有限公司 | A PVDC multi-layer co-extrusion mold with a temperature adjusting function |
| CN105437511B (en) * | 2014-08-26 | 2018-05-04 | 丹东全德高科技包装有限公司 | A kind of multi-layer co-extruded moulds of PVDC with temperature adjustment function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |