CN102700108A - Coextruded mould of polrvinyl chloride and polymethylmethacrylate - Google Patents
Coextruded mould of polrvinyl chloride and polymethylmethacrylate Download PDFInfo
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- CN102700108A CN102700108A CN2012102287242A CN201210228724A CN102700108A CN 102700108 A CN102700108 A CN 102700108A CN 2012102287242 A CN2012102287242 A CN 2012102287242A CN 201210228724 A CN201210228724 A CN 201210228724A CN 102700108 A CN102700108 A CN 102700108A
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Abstract
The invention provides a coextruded mould of polrvinyl chloride and polymethylmethacrylate, which belongs to the field of designing and manufacturing of extruded moulds. The coextruded mould comprises a connection head and a mould monomer, wherein the mould monomer is arranged behind the connection head; a diffusion plate, a splitter plate B5, a splitter plate A, a compressed plate, a mould head plate B and a mould head plate A are sequentially arranged on the mould monomer; the connection head and a hollow cavity in the mould monomer form a flow channel which allows materials to come in and go out; a mould core and an insert are arranged in the flow channel; a polrvinyl chloride supply port is formed on the connection head; a polymethylmethacrylate supply port is formed on the mould head plate B; the flow channel comprises a polrvinyl chloride flow channel and a polymethylmethacrylate flow channel which are converged in the mould head plate A; the converging part of the two flow channels serves as a coextruded material converging part; and the distance from the coextruded material converging part to a discharging port of the mould head plate A is 18mm to 22mm. By virtue of the mould, the two materials with different properties are compounded together in an extrusion process, and the fusion interface of the mould is stable and uniform.
Description
Technical field
The invention belongs to extrusion die design and manufacturing field, relate to the design of a kind of polyvinyl chloride and polymethyl methacrylate coextrusion mould and make.
Background technology
Oneself progressively develops the modern plastics production of articles to the composite direction from homogenous material; Developed into so far plastics and rubber, with metal material, with timber, with fiber, compound etc. with inorganic material or multiple plastics; Composite forming technology is widely used in industries such as building, automobile, electronics and furniture with its distinctive excellent properties.
It is a kind of extrusion molding composite forming technology that early 1980s begins to use that plastic co-extrusion goes out processing technology, and it has become one of contemporary state-of-the-art plastic shaping processing method.Plastic co-extrusion goes out technology and is to use several extruders to supply with different fusion materials flows respectively, thereby materials flow amounts to extrude at a composite machine head internal exchange and obtains the MULTILAYER COMPOSITE goods.The material that it can make multilayer have different qualities is combined with each other in extrusion; Make goods have the good characteristic of several kinds of different materials concurrently; On characteristic, carry out complementation; Thereby obtain the performance and the outward appearance of specific (special) requirements,, reach mechanical properties such as intensity, rigidity, hardness like anti-oxidation, moistureproof, moisture retention, thermoforming and heat bonding ability.These multilayer materials with combination property have using value extremely widely in a lot of fields.In addition, it can reduce the goods cost significantly, simplifies flow process, reduce equipment investment, and recombination process is without solvent, seldom produce three wastes material.Therefore coextrusion technology oneself be used to the production of laminated film, sheet material, tubing, profile shapes and electric wire.
The purpose of profile shapes coextrusion mainly is plastics of different nature to be extruded into the different parts of same section bar, thereby gives the section bar specific function or obtain best performance, price ratio, makes product diversification or multifunction, to improve product specification and to reduce cost.
Because in coextruding die, have two kinds of melts, its viscosity, flow velocity and pressure separately is all inequality, it is irregular and inhomogeneous to form fused interface easily; The shunting cone-shaped of plastic irregular profile coextruding die is irregular, and its internal structure is more complicated than general co-extrusion, and the interface fusion is difficult to control, so fusion all even stablizing in interface is the difficult point of surperficial coextrusion mould structure design
Summary of the invention
The object of the invention is exactly: a kind of polyvinyl chloride and polymethyl methacrylate coextrusion mould are provided, materials with different properties is extruded into the different parts of same section bar, the interface fusion is all even stablizes.
The present invention provides a kind of polyvinyl chloride and polymethyl methacrylate coextrusion mould; Comprise connector and subsequent mold monomers; Said mold monomers is provided with successively disperses plate, flow distribution plate B, flow distribution plate A, compressive plate, die plate B, die plate A, and the cavity in said connector and the mold monomers constitutes the runner of material turnover, is provided with core and mold insert in this runner; Have the polyvinyl chloride inlet on the said connector, have the polymethyl methacrylate inlet on the said die plate B; Said runner comprises polyvinyl chloride runner and polymethyl methacrylate runner; Said polyvinyl chloride runner and polymethyl methacrylate runner conflux in die plate A; Said river outlet is a co-extrusion material river outlet, and this co-extrusion material river outlet is plane 18-22mm apart from die plate A top discharge mouth place.
All have the keyway that is used to assemble and support core in said flow distribution plate A and the flow distribution plate B.
Be provided with the shunting muscle in the said runner.
The inlet size of polyvinyl chloride runner is bigger than outlet size on the said compressive plate.
Said mould also comprises two groups of mold monomers.The shared polyvinyl chloride inlet of these two groups of mold monomers, this inlet links to each other with two runners, and each runner is that a mold monomers is supplied with polyvinyl chloride.
Effect of the present invention:
Polyvinyl chloride provided by the invention and polymethyl methacrylate coextrusion die prodigiosin enough make two kinds to have the different qualities material and in extrusion, be combined with each other, its fused interface stable with evenly.
Through novel polyvinyl chloride and the polymethyl methacrylate coextrusion mould that manufactures and designs; Realize fusion polyvinyl chloride and polymethyl methacrylate that many extruders are supplied with respectively simultaneously; Materials flow amounts at a mould internal exchange and extrudes two bundle composite articles; Promptly on same strip extrusion production line, extrude two bundle polyvinyl chloride shown in Figure 1 and polymethyl methacrylate co-extrusion profile shapes simultaneously, be equivalent to the output of two conventional strip extrusion production lines.Not only improve production efficiency significantly, cut down the consumption of energy, reduced the investment of extrusion equipment; Increased substantially economic benefit, and it can make two kinds of materials with different qualities in extrusion, be combined with each other, make goods have the good characteristic of two kinds of different materials concurrently; On characteristic, carry out complementation, the principal mode material is used for making door and window, not only heat insulation, insulation, energy savings; Also practicing thrift timber, steel, is that country widelys popularize section bar.Polymethyl methacrylate promptly receives the part of sun insolation in the outside of the special-shaped main material of polyvinyl chloride, have weather, anti-combustion, performance such as shock-resistant.
Description of drawings
Fig. 1 polyvinyl chloride and polymethyl methacrylate co-extrusion profile shapes sectional view, wherein 1-polyvinyl chloride 2-polymethyl methacrylate.
The front view of Fig. 2 mould of the present invention.
The vertical view of Fig. 3 mould of the present invention, 12-runner A wherein, 13-runner B.
Fig. 4 be the A-A of Fig. 3 to cutaway view, 1-die plate A wherein, 2-die plate B, the 3-compressive plate, 4-flow distribution plate A, the 5-flow distribution plate, B 6-disperses plate, 7-connector, 8-core, 9-mold insert, 10-polymethyl methacrylate inlet, 11-polyvinyl chloride inlet.
Fig. 5 is the front view of compressive plate.
Fig. 6 is the left view of pressing plate plate, 14-polymethyl methacrylate runner wherein, 15-polyvinyl chloride runner.
Fig. 7 is the front view of die plate B.
Fig. 8 is the left view of die plate B, 14-polymethyl methacrylate runner wherein, 15-polyvinyl chloride runner.
The front view of Fig. 9 die plate A.
Figure 10 is the left view of die plate A, 15-polyvinyl chloride runner wherein, 17-discharging opening.
Figure 11 is the partial enlarged drawing of A portion among Figure 10,14-polymethyl methacrylate runner wherein, 16-co-extrusion material river outlet.
Figure 12 is that B-B is to cutaway view among Fig. 9, and wherein 14-is the polymethyl methacrylate runner.
The specific embodiment
Below in conjunction with accompanying drawing 1-12, be example with polyvinyl chloride and polymethyl methacrylate coextrusion mould, the process that manufactures and designs of coextrusion mould is described, accompanying drawing 1 is exactly a kind of polyvinyl chloride and polymethyl methacrylate co-extrusion profile shapes sectional view.Promptly receive the part of sun insolation to coat weather, anti-combustion, the impact-resistant polymethyl methacrylate of molecular weight 120000～180000 (the abbreviation code name is PMMA in the outside of polyvinyl chloride fan body; Be commonly called as lucite) layer, the thickness of this layer is generally at 0.2～0.5mm.Polyvinyl chloride is the special-shaped main material of complicated hollow, hollow can be heat insulation, insulation, for the interpolation steel lining of gaining in strength, be used for making plastic-steel door and window, can substitute timber, steel, be the material that country actively promotes.Polymethyl methacrylate promptly receives the part of sun insolation in the outside of the special-shaped main material of polyvinyl chloride, have weather, anti-combustion, performance such as shock-resistant.
Confirm parameter according to client's technology contract and drawing requirement: rule of thumb formula is tentatively confirmed compression ratio, generally gets 3～7, and the present embodiment compression ratio gets 4; Preliminary definite outlet gap; Preliminary confirm inlet type cavity length, bypass type cavity length, compression-type cavity length, moulding die cavity length, be optimized analysis through simulation software then, whether whether flow everywhere balance, speed of inspection outlet be consistent; Otherwise adjust the structural parameters of mould, assurance die head exit melt is everywhere evenly extruded.
Fig. 2 is exactly the structure chart of polyvinyl chloride of the present invention and polymethyl methacrylate coextrusion mould.
This polyvinyl chloride and polymethyl methacrylate coextrusion mould; Comprise connector 7 and subsequent mold monomers; Said mold monomers is provided with successively disperses plate 6, flow distribution plate B5, flow distribution plate A4, compressive plate 3, die plate B2, die plate A1, and said connector 7 constitutes the runner that material passes in and out with the interior cavity of mold monomers, is provided with core 8 and mold insert 9 in this runner; Have polyvinyl chloride inlet 11 on the said connector 7, have polymethyl methacrylate inlet 10 on the said die plate B2; Said runner comprises polyvinyl chloride runner 15 and polymethyl methacrylate runner 14; Said polyvinyl chloride runner 15 confluxes in die plate A1 with polymethyl methacrylate runner 14; Said river outlet is a co-extrusion material river outlet 16; This co-extrusion material river outlet 16 has 18-22mm, preferred 20 mm apart from the plane, discharging opening 17 place of die plate A1.This mould polyvinyl chloride inlet 11 through ring flange be connected with extruder, polymethyl methacrylate inlet 10 passes through connecting hole and is connected with an other extruder; Realize two extruders feed simultaneously like this, the polyvinyl chloride of fusion and polymethyl methacrylate melt pass through runner separately under the effect of pressure, after shunting and compression; In die plate A1, conflux; Through further compression and typing, extrude from die plate A slit, form surperficial coextruded plastic parison; After passing through cooling and shaping at last, form the surperficial coextruded plastic profile shapes of cross sectional shape shown in Figure 1.
All have in said flow distribution plate A and the flow distribution plate B and be used to assemble the keyway that supports core 8.
Be provided with the shunting muscle in the said runner.
The inlet size of polyvinyl chloride runner is bigger than outlet size on the said compressive plate 3.With the melt compression, to obtain enough densityes.Mating surface has also designed tapped through hole and opening groove, is used for assembling and dismounting.Compressive plate 3 of the present invention has also designed polymethyl methacrylate runner 14 on the exit face, will disperse from the polymethyl methacrylate of die plate 2 fusions.
Said mould also comprises two groups of mold monomers.The shared same polyvinyl chloride inlet 11 of these two groups of mold monomers, this inlet 11 links to each other with runner B13 with two runner A12, and each runner is that a mold monomers is supplied with polyvinyl chloride.Can on same strip extrusion production line, extrude two bundle polyvinyl chloride shown in Figure 1 and polymethyl methacrylate surface co-extrusion profile shapes so simultaneously, be equivalent to the output of two conventional strip extrusion production lines.
The plate 6 of dispersing of the present invention, the gateway die cavity is identical with connector 7 outlet die cavities, tentatively shunts the igelite melt of fusion through core 8 tail cones, and mating surface has also designed tapped through hole and opening groove, is used for assembling and dismounting.
Flow distribution plate A4 of the present invention and flow distribution plate B5 have designed keyway; Be used for assembling support core 8; Design some shunting muscle in the die cavity, melt has been divided into the close unit of several geometric properties, be used for shunting, stablizing the plastic melt of fusion; Mating surface has also designed tapped through hole and opening groove, is used for assembling and dismounting.
The gap area that die plate B2 of the present invention, die plate A1 and core 8, mold insert 9 constitute belongs to profiled section, is to influence the inhomogeneity most important zone of mould discharging, and the discharging gap must be evenly.Each mating surface also respective design screwed hole, through hole, counterbore and opening groove, be used for the assembling and the dismounting.
Die plate B2 of the present invention, die plate A1 are except that above function; Also designed polymethyl methacrylate runner 14 (co-extruding flow channel); Die plate B2 is provided with polymethyl methacrylate inlet 10; Inlet the polymethyl methacrylate runner 14 through polymethyl methacrylate runner 14 flow out to compressive plate 3 in of co-extrusion material polymethyl methacrylate in the die plate B2,14 shuntings of the polymethyl methacrylate runner in die plate B2 are extruded again.And then 14 compressions of the polymethyl methacrylate runner in die plate A1 are extruded; Conflux in die plate A1 with the polyvinyl chloride runner; Said river outlet is a co-extrusion material river outlet 16, and this co-extrusion material river outlet 16 has 18-22mm, preferred 20 mm apart from plane, die plate A1 top discharge mouth 17 place.
The present embodiment mold periphery has also designed lifting eye, thermometer hole, heating plate installing hole (annotating: do not draw in the structure chart).
Each die plate die cavity of present embodiment and die plate B2 co-extruding flow channel adopt the silk thread cutting processing of being careful; Compressive plate 3 co-extruding flow channels, die plate B2 co-extruding flow channel 1, die plate A1 co-extruding flow channel adopt Cutter Body Processing with Machining Center; Surface finish is main with extruding hone machine, and each die cavity surface roughness is: Ra0.1.
Each die plate of present embodiment and the processing of connector 7 connecting holes employing numerical control drilling machine, during the pincers worker assembling, the die cavity alignment, the gap is even, the size conforms drawing requirement, joint runner smooth transition, distribution is followed closely, screw is fastening.
After the present embodiment die head is accomplished assembling, on extruding production line, carry out the moulding debugging, and to product size, service check, the result shows fully and meets the requirements of the customers.
Claims (5)
1. polyvinyl chloride and polymethyl methacrylate coextrusion mould; Comprise connector and subsequent mold monomers; Said mold monomers is provided with successively disperses plate, flow distribution plate B, flow distribution plate A, compressive plate, die plate B, die plate A, and the cavity in said connector and the mold monomers constitutes the runner of material turnover, is provided with core and mold insert in this runner; It is characterized in that: have the polyvinyl chloride inlet on the said connector, have the polymethyl methacrylate inlet on the said die plate B; Said runner comprises polyvinyl chloride runner and polymethyl methacrylate runner; Said polyvinyl chloride runner and polymethyl methacrylate runner conflux in die plate A; Said river outlet is a co-extrusion material river outlet, and this co-extrusion material river outlet is plane 18-22mm apart from die plate A top discharge mouth place.
2. according to said polyvinyl chloride of claim 1 and polymethyl methacrylate coextrusion mould, it is characterized in that: all have the keyway that is used to assemble and support core in said flow distribution plate A and the flow distribution plate B.
3. according to said polyvinyl chloride of claim 2 and polymethyl methacrylate coextrusion mould, it is characterized in that: be provided with the shunting muscle in the said runner.
4. according to claim 2 or 3 said polyvinyl chloride and polymethyl methacrylate coextrusion mould, it is characterized in that: the inlet size of polyvinyl chloride runner is bigger than outlet size on the said compressive plate.
5. according to said polyvinyl chloride of claim 4 and polymethyl methacrylate coextrusion mould, it is characterized in that: said mould also comprises two groups of mold monomers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102287242A CN102700108A (en) | 2012-07-04 | 2012-07-04 | Coextruded mould of polrvinyl chloride and polymethylmethacrylate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102287242A CN102700108A (en) | 2012-07-04 | 2012-07-04 | Coextruded mould of polrvinyl chloride and polymethylmethacrylate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102700108A true CN102700108A (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102287242A Pending CN102700108A (en) | 2012-07-04 | 2012-07-04 | Coextruded mould of polrvinyl chloride and polymethylmethacrylate |
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| Country | Link |
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| CN (1) | CN102700108A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212759A (en) * | 2013-03-20 | 2013-07-24 | 淮海工学院 | Method for processing plastic profile shape extrusion die cavity by slow feeding |
| CN109382997A (en) * | 2018-12-07 | 2019-02-26 | 东莞市银禧光电材料科技股份有限公司 | The non-equal wall thickness of one kind squeeze out profile mold |
| CN114905719A (en) * | 2022-06-08 | 2022-08-16 | 瀚德（中国）汽车密封系统有限公司 | Mold for extruding top strip of glass guide groove |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2649316Y (en) * | 2003-08-29 | 2004-10-20 | 连云港杰瑞模具技术有限公司 | Wood-grained plastic special-section held coextrusion die |
| CN201895405U (en) * | 2010-12-02 | 2011-07-13 | 铜陵三佳科技股份有限公司 | Coextrusion die head for extruding profiled bar with coextrusion surface |
-
2012
- 2012-07-04 CN CN2012102287242A patent/CN102700108A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2649316Y (en) * | 2003-08-29 | 2004-10-20 | 连云港杰瑞模具技术有限公司 | Wood-grained plastic special-section held coextrusion die |
| CN201895405U (en) * | 2010-12-02 | 2011-07-13 | 铜陵三佳科技股份有限公司 | Coextrusion die head for extruding profiled bar with coextrusion surface |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212759A (en) * | 2013-03-20 | 2013-07-24 | 淮海工学院 | Method for processing plastic profile shape extrusion die cavity by slow feeding |
| CN103212759B (en) * | 2013-03-20 | 2015-07-01 | 淮海工学院 | Method for processing plastic profile shape extrusion die cavity by slow feeding |
| CN109382997A (en) * | 2018-12-07 | 2019-02-26 | 东莞市银禧光电材料科技股份有限公司 | The non-equal wall thickness of one kind squeeze out profile mold |
| CN114905719A (en) * | 2022-06-08 | 2022-08-16 | 瀚德（中国）汽车密封系统有限公司 | Mold for extruding top strip of glass guide groove |
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Application publication date: 20121003 |