CN102490366A - Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products - Google Patents
Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products Download PDFInfo
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- CN102490366A CN102490366A CN2011103994119A CN201110399411A CN102490366A CN 102490366 A CN102490366 A CN 102490366A CN 2011103994119 A CN2011103994119 A CN 2011103994119A CN 201110399411 A CN201110399411 A CN 201110399411A CN 102490366 A CN102490366 A CN 102490366A
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- oil
- temperature
- die lip
- extruder
- curtain coating
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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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
Abstract
The invention relates to a process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products. The process comprises the following steps of: uniformly stirring raw materials formed by mixing resin, packing and functional aids, and feeding the mixed raw materials into a twin-screw extruder; setting temperature of the extruder and the temperature of a sheet die; controlling the temperature of a die lip; staring the extruder to make a melted material flow out through the sheet die and introduced into a current coating composite roll; introducing woven cloth between two thin films and subjecting the woven cloth to composite forming; and cooling to finalize, performing roller guiding, edge shearing, flattening and finally rolling to form the clip net film product under the traction action of a traction roller. According to the process and the equipment, the melted raw materials are extruded by the twin-screw extruder, plasticized and stretched through current coating, the surface structure of the film is changed, and micropores are formed between base material plastic and packing materials, so that the density of the film is reduced. Thus, the clip net film product produced by the dual-extrusion current coating molding process has low specific gravity and light unit weight under the condition of same proportions, the equipment has a simple and reasonable structure, the production cost is a quarter of that of gluing equipment, and continuous production and molding are realized.
Description
Technical field
The present invention relates to the preparation technology and the equipment of plastic membrane product, relate in particular to a kind of method and apparatus of the lamp house cloth of preparing advertising.
Background technology
At present, the advertising lamp box cloth production technology is divided into following three kinds.
1, rolling process:
Rolling process is that the PVC powder is fully mixed with multiple auxiliary agents such as liquid plasticizers, after the pressure effect of elevated temperature heat is bonded into an integral body with base cloth.Be characterized in that surface smoothness is better, and printing opacity is even, on interior polishing lamp cloth, has superiority.But receive the restriction of equipment, fabric width generally is no more than 3 meters.
2, knife scraping method:
Knife scraping method lamp house cloth technology is that liquid PVC slurry is applied to the tow sides of base cloth equably with some scrapers, makes it be combined into an integral body fully through stoving process then, and cooling forming adopts this explained hereafter lamp cloth to be referred to as the cutter sheaing afterwards.Be characterized in that anti-permeability, stretching resistance, antistripping ability are stronger.Because the knife scraping method product is up and down an integral body, make and peel off phenomenon and be able to stop, and the intensity that can make jointing positions through welding is greater than product itself.At present, the lamp house cloth fabric width of this kind technology can reach 5 meters.Because complex manufacturing technology, making apparatus are relatively more expensive.
3, applying method:
Applying method lamp house cloth is that through heating, the optical fibers net with the centre under the pressure of hot-rolling fits together cooling forming with two formable layer PVC films up and down.The maximum characteristics of this kind technology are to possess good air brushing absorbency and stronger color representation power.At present, this type of lamp house cloth surpasses 70% in the occupation rate of market of China.
The production method of conventional plastic lamp house cloth, adopt produced the monolayer plastic calendered films earlier more, through preheat calendered film, compound with woven cloth heat, process the net film product through the typing of cooling deflector roll again.This method can not realize continuous production, and the batch production human input is big, and production cost is high; And the rolling equipment investment is very big.
Summary of the invention
In view of existing in prior technology the problems referred to above, the present invention aims to provide a kind of pair and extrudes the continuous production moulding of curtain coating plastic net film product Processes and apparatus, and its technology cost is low, and device structure is simple, especially is fit to industrialization and produces continuously.
Technical solution of the present invention is achieved in that
Extrude curtain coating plastic net film product for a kind of pair and produce moulding process continuously, comprise the steps:
(1) raw material mixes: Corvic, filler and functional aid are mixed, stir;
(2) two casting and stretching, compound of extruding: mixed material is put in the double screw extruder, set the temperature of extruder temperature and sheet mould head, control die lip temperature is opened extruder, and fused materials flows out through sheet film head, is introduced into casting roller; Simultaneously woven cloth is introduced composite molding between two films;
(3) cooling and shaping, and under the draw of carry-over pinch rolls through deflector roll, side cut, flattening, be wound into the net film goods at last;
In this process, the speed of whole production line is not more than 30m/min, and the temperature of double screw extruder is 155～185 ℃, and the temperature of sheet mould head is 170～185 ℃, and the conduction oil temperature is 190～200 ℃, and the die lip temperature is 185～195 ℃.
Further, in the step (2), the die lip temperature is through the control of oily temperature system; Its control procedure is following: the mould temperature controller is input to die lip oil-in with deep fat through oil pipe via high-temperature pump with heat-conducting oil heating to 190～200 ℃, and conduction oil gets into die lip to carry out heat exchange and die lip is heated up; And insulation die lip temperature is at 185～195 ℃; Conduction oil after the heat exchange is discharged through oil-out, returns the mould temperature controller, accomplishes a circulation.
The present invention discloses and two extrude curtain coating plastic net film product and produce former continuously, comprise extruder and sheet film head, cutting knife, cooling and shaping roller, deflector roll, carry-over pinch rolls, nip rolls and wrap-up is characterized in that:
Also comprise a pair of counterrotating curtain coating composite roll, and said extruder and sheet film head there are two covering devices of symmetry, i.e. extruder A and sheet film head A, extruder B and sheet film head B are symmetrically arranged in the left and right sides of two curtain coating composite rolls; Woven cloth is between two curtain coating composite rolls; And be folded in composite molding between two plastic sheetings; Said two plastic sheetings are that the fused materials that in sheet film head A, B, flows out respectively is introduced into the curtain coating composite roll then and forms, and laminated film passes through said cooling and shaping roller, deflector roll, carry-over pinch rolls, nip rolls and wrap-up successively.
Further, the heating rod of said film head is positioned at upper die body and lower mold body, also comprises the oily temperature system that is arranged in the die lip, and said oil temperature system comprises oil-in, oil circuit, oil-out and the mould temperature controller that connects through oil pipe; Said oil-in and oil-out are respectively in the hole of laterally getting of last die lip and following die lip; Through high-temperature pump the conduction oil in the mould temperature controller is input to said oil-in through oil pipe, the conduction oil and the die lip that get into die lip are discharged through oil-out after heat exchange, are back to the mould temperature controller.
Compared with prior art, technique effect of the present invention is following:
Said continuous production moulding process, with fused raw material through the double screw extruder extrusion plasticizing after casting and stretching, the surface texture of film changes, and produces micropore between base material plastics and the inserts, thereby has reduced the density of film.Therefore, under the identical conditions of mixture ratios, two to extrude the net film product proportion that casting molding processes produces little, light unit weight; Said device structure advantages of simple, cost of manufacture are about 1/4 of applying method equipment, especially, and the architecture advances of sheet film head; Changed the design that old-fashioned die body heating system adopts the heating rod heating, and adopted oily temperature system, thereby avoided heating rod to be spaced, the uneven drawback of die body bulk temperature; Guaranteed that raw material is heated evenly, plasticizing effect is good, good fluidity.Said Processes and apparatus has been realized continuous production moulding, has more competitiveness.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 is an equipment sketch map of the present invention;
Fig. 3 is an oil temperature system architecture sketch map of the present invention;
Fig. 4 is the A-A cutaway view of Fig. 3;
Fig. 5 is the M portion partial enlarged drawing of Fig. 4.Among the figure,
1. extruder A, a 2. film head A, 3. woven cloth, 4,8. curtain coating composite roll, 5. slice film head B, 6. extruder B; 7. cutting knife, 9,10. cooling and shaping roller, 11. deflector rolls, 12. carry-over pinch rolls, 13. nip rolls, 14. wrap-ups; 21. upper die body, 22. lower mold body, 23. heating rods, 24. damping blocks, die lip on 25., 26. times die lips; 27. die lip adjustment screw, 28. oil-outs, 29. oil-ins, 30 runners, 31. oil circuits.
The specific embodiment
The present invention is a primary raw material with Corvic, plasticizer, stabilizing agent, filler and other functional aid; Adopt said The tape casting one-shot forming, the compound net film product of processing; Corvic can be selected SG-3, SG-4 or SG-5 type resin for use, and filler is the above calcium carbonate products of 800 orders; Being used to produce transparent net film formula for a product does, presses mass fraction and forms: 100 parts of Corvics, plasticizer 30-60 part, stabilizing agent 4-6 part, other functional aid 5-10 part; Being used to produce high prescription of filling the net film product is to press mass fraction and form: 100 parts of Corvics, plasticizer 40-70 part, stabilizing agent 4-6 part, filler 50-100 part, other functional aid 5-10 part.
It is as depicted in figs. 1 and 2 that it produces molding process continuously; Mixed material with formation such as Corvic, filler and auxiliary agents; After high-speed stirred is even; Put among double screw extruder A and the B, configuring extruder temperature is that 155～185 ℃ of temperature with sheet mould head A and B are 170～185 ℃, and the die lip temperature is 185～195 ℃; Open extruder A and B, fused materials flows out through sheet film head A and B respectively, is introduced into curtain coating composite roll 4,8; Simultaneously woven cloth 3 is introduced composite molding between two films; Through cooling and shaping roller 9,10 cooling and shapings, and under the draw of carry-over pinch rolls 13, flatten, be wound into the net film goods at last through deflector roll 11, cutting knife 7 side cuts, nip rolls 13; The speed of whole production line is not more than 30m/min.
Above-mentioned two extruding in casting and stretching, the recombination process, the die lip temperature is controlled through oily temperature system, and its control procedure is following: the mould temperature controller is with heat-conducting oil heating to 190～200 ℃; Via high-temperature pump deep fat is input to die lip oil-in 29 through oil pipe; Conduction oil gets into die lip to carry out heat exchange and die lip is heated up, and is incubated the die lip temperature at 185～195 ℃, and the conduction oil after the heat exchange is discharged through oil-out 28; Return the mould temperature controller, accomplish a circulation.
It produces former continuously, and is as shown in Figure 2, comprises a pair of symmetrically arranged extruder A, B and sheet film head A, B; A pair of counterrotating curtain coating composite roll 4,8, cooling and shaping roller 9,10, deflector roll 11; Cutting knife 7, carry-over pinch rolls 12, nip rolls 13 and wrap-up 14; Said extruder A and sheet film head A, extruder B and sheet film head B are symmetrically arranged in the left and right sides of two curtain coating composite rolls 4,8; Woven cloth 3 is between two curtain coating composite rolls; And be folded in composite molding between two plastic sheetings; Said two plastic sheetings are that the fused materials that in sheet film head A, B, flows out respectively is introduced into curtain coating composite roll 4,8 then and forms, and laminated film passes through said cooling and shaping roller 9,10, deflector roll 11 successively; Carry-over pinch rolls 12, nip rolls 13 and wrap-up 14.
Compare the design of the heating rod of old-fashioned die body heating system, the present invention improves sheet film head:
The heating rod of said film head is positioned at upper die body and lower mold body, in die lip, has designed oily temperature system, and said oil temperature system comprises oil-in 29, oil circuit 31, oil-out 28 and the mould temperature controller that connects through oil pipe; Said oil-in 29 and oil-out 28 are respectively in the hole of laterally getting of last die lip 25 and following die lip 26; Adopt the temperature controlled process of above-mentioned oil temperature system's entering die lip following:
The mould temperature controller is with heat-conducting oil heating to 190～200 ℃; By high-temperature pump deep fat is input to die lip oil-in 29 through oil pipe again; Conduction oil gets into die lip and die lip carries out heat exchange and die lip is heated up, and insulation is at 185～195 ℃, and the conduction oil after the exchange is discharged through oil-out 28; Return the mould temperature controller, accomplish a circulation.
Moulding process of the present invention is to adopt to produce the cast film continuous forming process of composite braided fabric simultaneously with technology; Both simplified process for making in the past; Increased the hot strength of product again, produced micropore between base material plastics and the inserts simultaneously, thereby reduced the density of film; Can alleviate 10～20% product quality, effectively reduce the manufacturing cost of product.
The above; Be merely the preferable specific embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technical staff who is familiar with the present technique field is equal to replacement or change according to technical scheme of the present invention and inventive concept thereof in the technical scope that the present invention discloses, all should be encompassed within protection scope of the present invention.
Claims (4)
1. two extrude curtain coating plastic net film product and produce moulding process continuously for one kind, comprise the steps:
(1) raw material mixes: Corvic, filler and functional aid are mixed, stir;
(2) two casting and stretching, compound of extruding: mixed material is put in the double screw extruder, set the temperature of extruder temperature and sheet mould head, control die lip temperature is opened extruder, and fused materials flows out through sheet film head, is introduced into the curtain coating composite roll; Simultaneously woven cloth is introduced composite molding between two films;
(3) cooling and shaping, and under the draw of carry-over pinch rolls through deflector roll, side cut, flattening, be wound into the net film goods at last;
In this process, the speed of whole production line is not more than 30m/min, and the temperature of double screw extruder is 155～185 ℃, and the temperature of sheet mould head is 170～185 ℃, and the conduction oil temperature is 190～200 ℃, and the die lip temperature is 185～195 ℃.
2. extrude curtain coating plastic net film product for as claimed in claim 1 pair and produce moulding process continuously, it is characterized in that:
In the step (2), the die lip temperature is through the control of oily temperature system, and its control procedure is following: the mould temperature controller is with heat-conducting oil heating to 190～200 ℃; Via high-temperature pump deep fat is input to the die lip oil-in through oil pipe; Conduction oil gets into die lip to carry out heat exchange and die lip is heated up, and is incubated the die lip temperature at 185～195 ℃, and the conduction oil after the heat exchange is discharged through oil-out; Return the mould temperature controller, accomplish a circulation.
3. two extrude curtain coating plastic net film product and produce former continuously for one kind, comprise extruder and sheet film head, cutting knife, cooling and shaping roller, deflector roll, carry-over pinch rolls, nip rolls and wrap-up is characterized in that:
Also comprise a pair of counterrotating curtain coating composite roll, and said extruder and sheet film head there are two covering devices of symmetry, i.e. extruder A and sheet film head A, extruder B and sheet film head B are symmetrically arranged in the left and right sides of two curtain coating composite rolls; Woven cloth is folded between two curtain coating composite rolls, passes through said cooling and shaping roller, deflector roll, carry-over pinch rolls, nip rolls and wrap-up successively.
4. continuous production former as claimed in claim 3 is characterized in that:
The heating rod of said film head is positioned at upper die body and lower mold body, also comprises the oily temperature system that is arranged in the die lip, and said oil temperature system comprises oil-in, oil circuit, oil-out and the mould temperature controller that connects through oil pipe; Said oil-in and oil-out are respectively in the hole of laterally getting of last die lip and following die lip; Through high-temperature pump the conduction oil in the mould temperature controller is input to said oil-in through oil pipe, the conduction oil and the die lip that get into die lip are discharged through oil-out after heat exchange, are back to the mould temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103994119A CN102490366A (en) | 2011-12-03 | 2011-12-03 | Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103994119A CN102490366A (en) | 2011-12-03 | 2011-12-03 | Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products |
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| CN102490366A true CN102490366A (en) | 2012-06-13 |
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| CN2011103994119A Pending CN102490366A (en) | 2011-12-03 | 2011-12-03 | Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941643A (en) * | 2012-12-07 | 2013-02-27 | 卢建忠 | Method for manufacturing fresh-keeping isolating layers circularly used for rubber tire preparation |
| CN103192584A (en) * | 2013-04-17 | 2013-07-10 | 江苏苏龙环保科技有限公司 | Preparation method and device of special membrane material for mining air drum |
| CN103465486A (en) * | 2013-09-02 | 2013-12-25 | 大连塑料研究所有限公司 | Continuous production method of reinforced high-strength plastic plate |
| CN104149306A (en) * | 2014-08-28 | 2014-11-19 | 青岛恒昌泰橡塑机械有限公司 | Production line of advertising cloth all-in-one machine |
| CN104504944A (en) * | 2014-12-16 | 2015-04-08 | 江西盛汇光学科技有限公司 | Polycarbonate light diffusion film for backlight displaying of mobile phone and preparation method of polycarbonate light diffusion film |
| CN104924511A (en) * | 2015-06-02 | 2015-09-23 | 瑞安市塑料薄膜厂 | Calendering roll temperature compensating device for plastic film processing equipment |
| CN104943128A (en) * | 2014-03-27 | 2015-09-30 | 北京华腾佳和科技有限公司 | PVC casting film production line adopting planetary screw extruder |
| CN106541565A (en) * | 2015-09-21 | 2017-03-29 | 上海堃元新材料有限公司 | A kind of Wound product material production device |
| CN107804001A (en) * | 2017-11-21 | 2018-03-16 | 汕头市三马塑胶制品有限公司 | The production method of foam sheet surface film |
| CN109760602A (en) * | 2019-02-27 | 2019-05-17 | 上海华迎汽车零部件有限公司 | The rear cover and return moldings plate and its manufacture craft of a kind of car trunk |
| CN109968574A (en) * | 2019-05-16 | 2019-07-05 | 江苏科润膜材料有限公司 | Produce the steel band casting device and its film-forming method of enhanced perfluorinated ion-exchange membrane |
| CN112757642A (en) * | 2020-04-02 | 2021-05-07 | 苏州美梦机器有限公司 | Screw type feeding device, material extrusion system and method for 3D printing |
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| CN115071182A (en) * | 2021-03-15 | 2022-09-20 | 大连塑研塑料科技开发有限公司 | Processing and forming method for high-strength plastic film plate |
| CN115071095A (en) * | 2021-03-15 | 2022-09-20 | 大连塑研塑料科技开发有限公司 | Hot-melting co-extrusion molding method of PVC (polyvinyl chloride) composite cloth |
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Cited By (16)
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|---|---|---|---|---|
| CN102941643A (en) * | 2012-12-07 | 2013-02-27 | 卢建忠 | Method for manufacturing fresh-keeping isolating layers circularly used for rubber tire preparation |
| CN103192584A (en) * | 2013-04-17 | 2013-07-10 | 江苏苏龙环保科技有限公司 | Preparation method and device of special membrane material for mining air drum |
| CN103465486A (en) * | 2013-09-02 | 2013-12-25 | 大连塑料研究所有限公司 | Continuous production method of reinforced high-strength plastic plate |
| CN104943128A (en) * | 2014-03-27 | 2015-09-30 | 北京华腾佳和科技有限公司 | PVC casting film production line adopting planetary screw extruder |
| CN104149306A (en) * | 2014-08-28 | 2014-11-19 | 青岛恒昌泰橡塑机械有限公司 | Production line of advertising cloth all-in-one machine |
| CN104504944A (en) * | 2014-12-16 | 2015-04-08 | 江西盛汇光学科技有限公司 | Polycarbonate light diffusion film for backlight displaying of mobile phone and preparation method of polycarbonate light diffusion film |
| CN104924511A (en) * | 2015-06-02 | 2015-09-23 | 瑞安市塑料薄膜厂 | Calendering roll temperature compensating device for plastic film processing equipment |
| CN106541565A (en) * | 2015-09-21 | 2017-03-29 | 上海堃元新材料有限公司 | A kind of Wound product material production device |
| CN107804001A (en) * | 2017-11-21 | 2018-03-16 | 汕头市三马塑胶制品有限公司 | The production method of foam sheet surface film |
| CN109760602A (en) * | 2019-02-27 | 2019-05-17 | 上海华迎汽车零部件有限公司 | The rear cover and return moldings plate and its manufacture craft of a kind of car trunk |
| CN109968574A (en) * | 2019-05-16 | 2019-07-05 | 江苏科润膜材料有限公司 | Produce the steel band casting device and its film-forming method of enhanced perfluorinated ion-exchange membrane |
| CN109968574B (en) * | 2019-05-16 | 2024-02-06 | 江苏科润膜材料有限公司 | Steel belt casting device for producing enhanced perfluorinated ion exchange membrane and membrane manufacturing method thereof |
| CN112757642A (en) * | 2020-04-02 | 2021-05-07 | 苏州美梦机器有限公司 | Screw type feeding device, material extrusion system and method for 3D printing |
| CN112758613A (en) * | 2020-04-02 | 2021-05-07 | 苏州美梦机器有限公司 | Material conveying system and method |
| CN115071182A (en) * | 2021-03-15 | 2022-09-20 | 大连塑研塑料科技开发有限公司 | Processing and forming method for high-strength plastic film plate |
| CN115071095A (en) * | 2021-03-15 | 2022-09-20 | 大连塑研塑料科技开发有限公司 | Hot-melting co-extrusion molding method of PVC (polyvinyl chloride) composite cloth |
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Application publication date: 20120613 |