CN1134348A - Quantitative extrusion process for making ethylene-vinyl acetate copolymer sole - Google Patents
Quantitative extrusion process for making ethylene-vinyl acetate copolymer sole Download PDFInfo
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- CN1134348A CN1134348A CN 95105194 CN95105194A CN1134348A CN 1134348 A CN1134348 A CN 1134348A CN 95105194 CN95105194 CN 95105194 CN 95105194 A CN95105194 A CN 95105194A CN 1134348 A CN1134348 A CN 1134348A
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Abstract
The copolymer colloidal particles are mixed with foaming agent, cross-linking agent and filler in certain weight ratio, and the mixture is extruded in double-screw extruder and cut to obtain unfoamed quantitative copolymer sheet, which is then foamed through heating in the first mould to form sole blank and finally produced through heat treatment at certain temp and pressure for certain time and cooling to become finished sole product.
Description
The present invention relates to the quantitative manufacture method of extruding of a kind of vinyl-vinyl acetate copolymer sole, particularly relate to a kind of quantitative manufacture method of extruding of the vinyl-vinyl acetate copolymer sole that reduces cost, reduces waste material.
Because wage cost improves, and shoe industry belongs to labour-intensive type industry, the shoemaking dealer must improve from the production process aspect, to reduce production costs in recent years.
The development of the manufacture method of relevant vinyl-vinyl acetate copolymer (hereinafter to be referred as EVA) sole has following method so far: 1. general method for making, 2. injection, 3. three kinds of extrusion moldings etc., and above-mentioned three kinds of manufacture methods all respectively have its shortcoming in actual production:
1. general method for making: as shown in Figure 1, it comprises following step haply: and raw material weighs → and kneading machine mixes → mixing and compressing tablet → foaming platform issuance of materials plate → epithelium → slitting → slanting cutting machine skin graft → severing footwear type → grinding → post forming mould shape → deburring → finished product about cooling off → cutting.Because of the process complexity, equipment needed thereby reaches artificial many with this processing mode, and the processing site is also bad because of appointed condition, cause that dust is many, temperature is high, the operating personnel is healthy in harm, and the waste material of manufacturing is more up to 40%-60%, and causes waste pollution because of being difficult for destruction.
2. injection: three kinds of forms are roughly arranged:
(1) raw material is weighed → kneading machine mixing → injector (extruder) granulation → injector injection moulding.This kind mode is the manufacture method of Italian MAlN-Group and Spain EVATECH two companies.
(2) raw material is weighed → kneading machine mixing → injector (extruder) granulation → injection formation semifinished product → secondary mould pressing moulding → deburring → finished product.
(3) raw material weigh → kneading machine mixing → injector inject the EVA sheet quantitatively → one-off pattern is foamed into semifinished product → second time of foaming mold forming → finished product.
General injection is huge because of equipment needed thereby, the machine cost height, its injection product dimensional stability is bad, and for example No. eight sizes often become No. seven sizes or No. nine sizes, and can't grasp model quantity really, cause the bad of quality, and the repeatability to careful lines is bad, and quality is not senior, and used injection molding takes also 2-3 times for general method for making mould expense, cost is quite high, and economic benefit is low.Above-mentioned injection (two) is still had similar approach (one's) shortcoming though the shortcoming of the injection of considering () improves.And injection (three) is to consider the shortcoming of injection () (two) and improved method, but because of equipment needed thereby capable many, the cost of equipment height, relative cost height, so the method still need have very high specification requirement in the allotment of prescription, otherwise its quality of finished and conventional method finished product relatively still have gap.
3. extrusion molding: as shown in Figure 2, it roughly comprises following step: raw material weighs → kneading machine mixes → mixing and compressing tablet → single screw extrusion machine extrude → get EVA quantitatively → one-off pattern is foamed into semifinished product → finishing semifinished product → two apotype foaming → finished products.The EVA mixing process of this method leading portion because be still in the past the practice, has very long mixing process, the then similar injection of its back segment, and equipment needed thereby and artificial many, and its quality of finished is not good yet.
The object of the present invention is to provide a kind of quantitative extrusion process for making of vinyl-vinyl acetate copolymer sole, can be made for mixing and extrude semi-finished product and use via double screw extruder, and the cooperation severing is handled, forming processes, forming processes and deburring processing for the second time for the first time, can reduce production costs, reduce waste material, meet the productivity effect principle.
The quantitative extrusion process for making of vinyl-vinyl acetate copolymer sole of the present invention comprises following step:
(1) the raw material processing of weighing:, weigh up weight according to certain ratio with materials such as EVA micelle, blowing agent, filler, crosslinking agents.
(2) mix, extrude, severing handles: raw material after simple the mixing, is flowed in the double screw extruder automatically, extrudes the not film of foaming, and do quantitative severing processing simultaneously.
(3) forming processes for the first time: the film that will not foam is put into shaping mould for the first time, is foamed into base type just.
(4) forming processes for the second time: insert again behind the above-mentioned blank molding just for the second time in the shaping mould, provide dapple moulding product with hot pressing.
(5) deburring is handled: with above-mentioned moulding product after the moulding second time with the part that it is unnecessary that processing machine prunes away, to finish finished product.
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is the block flow diagram of general in the past EVA producing method for soles.
Fig. 2 is a block flow diagram of in the past extruding the EVA producing method for soles.
Fig. 3 is a processing method for making schematic diagram of the present invention.
Fig. 4 is the block flow diagram of Sole moulding of the present invention.
Vinyl-vinyl acetate copolymer sole of the present invention extrude quantitative manufacture method, shown in Fig. 3,4, comprise following feature and step:
(1) the raw material processing of weighing:,, weigh up weight in certain proportion according to the requirement of rerum natura with chemical materials such as EVA sizing material, blowing agent, filler, crosslinking agents.Usually in its mixed proportion, the EVA micelle accounts for 65-70%, and blowing agent is 3-5%, and filler is 20-30%, and crosslinking agent is 1-2%.
(2) mix, extrude, severing handles: with above-mentioned raw materials after mixing channel evenly mixes, automatically flow in the double screw extruder, and extrude not the film 10 of foaming through a T pattern, the effect of this T pattern is to be used for slice, and this T pattern can be adjusted the arrangement bolt of its upper end, makes the lower end can adjust a suitable spacing of extruding, and determines its slice thickness, so after the slice, utilize a cutting machine to do quantitative severing and handle.
(3) forming processes for the first time: will above-mentioned not foaming and film 10 after severing is put into shaping mould 5 for the first time, through constant temperature, level pressure, regularly be foamed into first base type 20.Above-mentioned constant temperature is controlled at 150-160 ℃ approximately, and pressure is controlled at 120-150kg/cm
2, the time then was controlled at 12-15 fens, and this film 10 can be according to the sole thickness of desiring moulding, and can insert for the first time a slice moulding in the shaping mould 5 separately, or inserted for the first time in the shaping mould 5 overlapping hot-forming with two or three simultaneously.
(4) forming processes for the second time: behind the above-mentioned blank molding just, insert for the second time in the shaping mould 6, because of this second time shaping mould 6 die cavity 6 ' have decorative pattern, so hot pressing is provided dapple moulding product 30, the temperature of said method is controlled at 150-160 ℃ approximately, and pressure is controlled at 100-120kg/cm
2Time then was controlled at 12-15 fens, did cooling processing after hot pressing again.
(5) deburring is handled: above-mentioned moulding product after the moulding second time with the part that it is unnecessary that processing machine prunes away, are finished and extruded quantitative sole product 40.
Can be made for mixing and extrude semi-finished product and use through double screw extruder of the present invention; and cooperate the continuous process that severing is handled, forming processes, forming processes and deburring for the second time for the first time handled; the sole that the present invention is made can reach and reduce production costs, reduces the requirement that waste material produces; to meet productivity effect; and; because of it can control accurate material amount to extrude; so the present invention is mixed to the process of finished product from getting raw material; almost there is not waste material to produce; relatively can reduce material cost, and the minimizing waste material also can meet requirement on environmental protection.
Method for making of the present invention, process advantage are described as follows:
1. the present invention does mixing with double screw extruder and extrudes semi-finished product and use, unlike in the past Only merely double screw extruder is done mixing use, so equipment required for the present invention was than in the past Mode has been lacked a lot, has also increased the purposes of double screw extruder.
2. mix, extrude, the severing step is that continuous processing is once finished, and can save a lot of people The worker, reduce production costs.
2. can do the adjustment of size during severing because of cutting machine, so that the present invention can be fit to is various Do sizing (quantitatively) severing with big small size footwear type, and extrusion equipment in the past, must change The die change area of bed just can be finished quantitative sampling, increases cost.
4. extrusion sheet of the present invention is smooth smooth, though weigh through polylith in the shaping mould in the first time Folded, but it makes also not have when foaming is processed the phenomenon that bag wind causes destroying the finished product outward appearance, again Because getting quantitative Raw material processing according to shoes model size, the utmost point that only has deburring to remove of consume On a small quantity, can not produce a large amount of waste materials.
5. equipment required for the present invention has lacked much the factory area occupied than mode in the past Little, meet returns of investment.
6. the present invention is because adopting the overlapping processing method of slice (film), so can make institute The EVA sole (containing the big end, the middle end) of meaning sandwich or dual density (Two-density), one The inferior finished product that machines can make sole lighter, to meet the requirement of world trends.
In sum, the squeezing out quantitative of vinyl-vinyl acetate copolymer sole of the present invention Manufacture method, its manufacturing and processing procedure really have reducing cost, reduce the advantage of waste material.
Claims (4)
1. the quantitative extrusion process for making of a vinyl-vinyl acetate copolymer sole is characterized in that comprising the following step:
(1) the raw material processing of weighing:, weigh up weight according to a certain percentage with materials such as vinyl-vinyl acetate copolymer micelle, blowing agent, filler, crosslinking agents;
(2) mix, extrude, severing handles: raw material after mixing, is flowed in the double screw extruder more automatically, extrudes the not film of foaming, and do quantitative severing simultaneously and handle;
(3) forming processes for the first time: the film that will not foam is put into shaping mould for the first time, is foamed into base type just.
(4) forming processes for the second time: insert for the second time in the shaping mould, provide dapple moulding product with hot pressing;
(5) deburring is handled: with above-mentioned moulding product after the moulding second time with the part that it is unnecessary that processing machine prunes away, to finish finished product.
2. the quantitative extrusion process for making of vinyl-vinyl acetate copolymer sole as claimed in claim 1 is characterized in that:
Mixed proportion in this vinyl-vinyl acetate copolymer micelle, blowing agent, filler, the crosslinking agent, vinyl-vinyl acetate copolymer micelle accounting example 65-70%, blowing agent is 3-5%, and filler is 20-30%, and crosslinking agent is 1-2%.
3. the quantitative extrusion process for making of vinyl-vinyl acetate copolymer sole as claimed in claim 1 is characterized in that:
For the first time during forming processes, temperature is controlled at 150-160 ℃ for this, and pressure is controlled at 120-150kg/cm
2, the time was controlled at 12-15 fens.
4. the quantitative extrusion process for making of vinyl-vinyl acetate copolymer sole as claimed in claim 1 is characterized in that:
For the second time during forming processes, temperature is controlled at 150-160 ℃ for this, and pressure is controlled at 100-120kg/cm
2, the time was controlled at 12-15 fens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95105194 CN1134348A (en) | 1995-04-28 | 1995-04-28 | Quantitative extrusion process for making ethylene-vinyl acetate copolymer sole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95105194 CN1134348A (en) | 1995-04-28 | 1995-04-28 | Quantitative extrusion process for making ethylene-vinyl acetate copolymer sole |
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| Publication Number | Publication Date |
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| CN1134348A true CN1134348A (en) | 1996-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 95105194 Pending CN1134348A (en) | 1995-04-28 | 1995-04-28 | Quantitative extrusion process for making ethylene-vinyl acetate copolymer sole |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091025C (en) * | 1999-11-10 | 2002-09-18 | 刘坤钟 | Method for moulding foaming sole |
| CN100417684C (en) * | 2004-08-25 | 2008-09-10 | 丰泰企业股份有限公司 | Composite and prepn of shoe material |
| CN101851367A (en) * | 2010-05-17 | 2010-10-06 | 惠州全品科技工业有限公司 | Process for manufacturing plastics |
| CN102019705A (en) * | 2009-09-21 | 2011-04-20 | 逢甲大学 | Method for manufacturing biobased macromolecule shoe material |
| CN103613919A (en) * | 2013-11-20 | 2014-03-05 | 南京诚盟机械有限公司 | Shoe material hot-melt adhesive sheet and production process and equipment thereof |
| CN109049788A (en) * | 2018-06-08 | 2018-12-21 | 晋江兴迅新材料科技有限公司 | A kind of moulding process of the high-elastic insole of environment-friendly light |
| CN109824970A (en) * | 2019-02-25 | 2019-05-31 | 余新军 | A kind of production technology of sole |
-
1995
- 1995-04-28 CN CN 95105194 patent/CN1134348A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091025C (en) * | 1999-11-10 | 2002-09-18 | 刘坤钟 | Method for moulding foaming sole |
| CN100417684C (en) * | 2004-08-25 | 2008-09-10 | 丰泰企业股份有限公司 | Composite and prepn of shoe material |
| CN102019705A (en) * | 2009-09-21 | 2011-04-20 | 逢甲大学 | Method for manufacturing biobased macromolecule shoe material |
| CN102019705B (en) * | 2009-09-21 | 2013-07-31 | 逢甲大学 | Method for manufacturing biobased macromolecule shoe material |
| CN101851367A (en) * | 2010-05-17 | 2010-10-06 | 惠州全品科技工业有限公司 | Process for manufacturing plastics |
| CN103613919A (en) * | 2013-11-20 | 2014-03-05 | 南京诚盟机械有限公司 | Shoe material hot-melt adhesive sheet and production process and equipment thereof |
| CN103613919B (en) * | 2013-11-20 | 2015-06-17 | 江苏诚盟装备股份有限公司 | Shoe material hot-melt adhesive sheet and production process and equipment thereof |
| CN109049788A (en) * | 2018-06-08 | 2018-12-21 | 晋江兴迅新材料科技有限公司 | A kind of moulding process of the high-elastic insole of environment-friendly light |
| CN109824970A (en) * | 2019-02-25 | 2019-05-31 | 余新军 | A kind of production technology of sole |
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