CN100506505C - Process for ejection foaming multi-density vinyl acetate vinyl ester copolymer middle bottom - Google Patents
Process for ejection foaming multi-density vinyl acetate vinyl ester copolymer middle bottom Download PDFInfo
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- CN100506505C CN100506505C CNB2004100544613A CN200410054461A CN100506505C CN 100506505 C CN100506505 C CN 100506505C CN B2004100544613 A CNB2004100544613 A CN B2004100544613A CN 200410054461 A CN200410054461 A CN 200410054461A CN 100506505 C CN100506505 C CN 100506505C
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- color lump
- germule
- foaming
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Abstract
An ejection foaming method for preparing the insole from multi-density ethene-vinyl acetate copolymer includes such steps as preparing multiple color blocks from said copolymer with a certain density, putting them in an insole mould, ejecting said copolymer with different density in the mould, and bridging while foaming to form an insole.
Description
[technical field]
The present invention relates to the method for making at the end in a kind of footwear, particularly relates to the shooting foaming method for making at the end in a kind of multi-density ethylene vinyl acetate co-polymer.
[background technology]
In the general shoes method for making at the end normally with ethylene vinyl acetate co-polymer (EVA) plastic cement as raw material, utilize a Jet forming machine that one mould is penetrated operation, after moulding is finished, die sinking just can be taken out end finished product in, though above-mentioned processing procedure can be manufactured quickly and easily and finish at the middle end, yet the end in being somebody's turn to do, is because the too dull variability that lacks of the color of finished product, be more difficult to get consumer's favor, and integral body of the middle end is the structure of hardness homogeneous, can produce discomfort when the consumer dresses, on market, more not have commercial competitiveness, for this reason, have the dealer improve general in the method for forming at the end, make it produce double-colored and have the effect of dual density simultaneously.
Referring to shown in Figure 1, the method for making of the middle end of general two-color dual-density mainly is to be raw material with ethylene vinyl acetate co-polymer (EVA) plastic cement, after this raw material process proper formulation colour mixture, can be positioned in advance in the mould, make its foaming go out one to mold heated and connect color lump, after the room temperature cooling, the color lump that connects of two kinds of different densities and color is bondd then mutually, make connect the color lump size be a bit larger tham in the end net shape, then, to connect color lump again inserts in one in the bottom die, utilize compression molding forming machine that ethylene vinyl acetate co-polymer (EVA) plastic material is squeezed to middle bottom die, centering bottom die pressurized, heated makes and connects color lump typing in the mould, again through after the cooling, just can obtain the finished product of the middle end with two-color dual-density.
The above-mentioned method of forming can make the middle end with different densities structure really, yet on cost, but more do not have economic benefit, because general processing procedure is to manufacture two winding color lumps earlier to reach the effect of two-color dual-density, but generally manufacturing when connecing color lump, usually will be earlier through foaming for the first time, next will connect color lump insert in after the bottom die, connect color lump and also will carry out the typing second time, typing each time or foaming operation all need to keep the quite permanent time, finish manufacturing of the end in one and delay man-hour oversizely, on time cost, be not inconsistent economic benefit.
[summary of the invention]
The purpose of this invention is to provide the shooting foaming method for making at the end in a kind of multi-density ethylene vinyl acetate co-polymer, can significantly save Production Time, reduce production costs.
The invention provides the shooting foaming method for making at the end in a kind of multi-density ethylene vinyl acetate co-polymer, it is characterized in that comprising the following steps:
(1). manufacturing not, foaming connects color lump: at first make with an ethylene vinyl acetate co-polymer allotment with predetermined density prescription composition and connect the color lump raw material, ejection formation one connects the color lump germule in a color lump mould, the forming temperature of control color lump raw material is near 100 ℃, molding time is 10 ~ 15 seconds, be 20 ~ 30 seconds cool time, in this step, but connecing the color lump raw material is to reach flowing forming the state that does not reach the foaming of building bridge;
(2). insert mould: then the individual color lump germule that connects of majority is placed in one in the bottom die, bottom die has a die cavity of the net shape at the end in the corresponding shoes in this, make these several connect the color lump germule and insert correct corresponding precalculated position in die cavity;
(3). common shooting foaming: connect these several color lump germule insert in after the bottom die, again allotment another kind of be different from these several connect the ethylene vinyl acetate co-polymer of color lump germule density prescription composition as bulk stock, utilize make-up machine centering bottom die to penetrate operation, in this step, it is that common foaming and building bridge each other combines in middle bottom die that bulk stock and all connect the color lump germule, the forming temperature of bottom die is at 160 ~ 180 ℃ in the control, and the molding time that foaming is built bridge was at 6 ~ 7 minutes;
(4). delivery: after the foaming operation finished, bottom die was taken out end semi-finished product in opening, and should put into baking oven cooling typing by semi-finished product of the middle end at last, and the time is no more than 15 seconds;
(5). end finished product in making.
The shooting foaming method for making at the end in the described multi-density ethylene vinyl acetate co-polymer is characterized in that: connects in the color lump germule step manufacturing, can be via the prescription finishing, and adjust and connect the color lump germule and have multiple color, hardness, functional density structure.
More than be the general introduction of the shooting foaming method for making at the end in the multi-density ethylene vinyl acetate co-polymer of the present invention, then, again the present invention is expected the effect statement that can reach as after:
(1). effectively shorten and manufacture man-hour
The present invention manufactures and connects the color lump germule and be based under the restrictive condition that the EVA raw material do not do to foam and carry out ejection formation, what so the present invention can mold various different colours, density rapidly in processing procedure connects color lump germule 1,2,3, the end, is during finished product 30 in the present invention will manufacture, then be with these connect color lump germule 1,2,3 insert in the bottom die 20 with the foaming of building bridge jointly of EVA raw material, in the middle of the forming process at the whole middle end 30, Fa Pao step for once, therefore the present invention can shorten significantly and manufactures man-hour the cost of effectively saving time.
(2). finished product is aesthetic in appearance
The present invention utilizes different colours to connect the forming technique of color lump germule 1,2,3, can make the neighboring at the whole middle end 30 show visual effect with multiple different color variation, so by shoes that the present invention made, has bright-coloured active effect in appearance, can significantly promote the aesthetic property of shoes, improve the competitiveness of product in market.
(3). finished product has buffering and support function
Appropriate position, the ends 30 forms the color lump that connects of different densities in the utilization of the present invention, the color lump that connects that density is solid has the good supporting function to the human foot, density is soft connects color lump then can provide preferable shock-absorbing buffer capacity to the human foot, and so the end 30 can provide support and multinomial function such as buffering simultaneously among the present invention.
[description of drawings]
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is the flow chart at the end in the general two-color dual-density;
Fig. 2 is the flow chart of shooting foaming method for making one preferred embodiment at the end in the multi-density ethylene vinyl acetate co-polymer of the present invention;
Fig. 3 is the schematic diagram of above-mentioned preferred embodiment, illustrates that the EVA raw material under foamed state not, goes out one to a color lump mould ejection formation and connects the color lump germule;
Fig. 4 is the action diagram of above-mentioned preferred embodiment, illustrates that the color lump germule that connects of taking most different colours, density is placed in one in the bottom die;
Fig. 5 is the die cut view () of above-mentioned preferred embodiment, illustrate these connect the color lump germule in middle bottom die inside the situation of foaming not as yet;
Fig. 6 is the die cut view (two) of above-mentioned preferred embodiment, illustrate these connect the color lump germule in middle bottom die with the situation of the common foaming of EVA raw material;
Fig. 7 is the finished product stereogram of above-mentioned preferred embodiment, and what illustrate that the middle end that moulding is finished in position locates to have different colours and density connects the color lump outward appearance; And
Fig. 8 is the finished product stereogram of another preferred embodiment, and what illustrate that the middle end that moulding is finished is formed with multilayered color-forming and density at the same position place connects the color lump outward appearance.
[specific embodiment]
Aforementioned and other technology contents, characteristics and effect about the present invention in the following detailed description that cooperates with reference to two graphic preferred embodiments, can clearly be understood.
Referring to shown in Figure 2, the shooting foaming method for making at the end in the multi-density ethylene vinyl acetate co-polymer of the present invention, it has (1). and manufacturing not, foaming connects color lump → (2). insert mould → (3). common shooting foaming → (4). delivery → (5). steps such as finished product of the middle end then are specified in above-mentioned steps the back:
(1). group more than manufacturing foaming connects color lump, at first, the producer earlier the allotment of ethylene vinyl acetate co-polymer is made one have a predetermined density prescription composition connect the color lump raw material, the board that uses is a kind of disc type TPR Jet forming machine, this make-up machine can connect color lump germule 1 (referring to shown in Figure 3) to ejection formation one in the color lump mould 10, control connects the forming temperature of color lump raw material near about 100 ℃, the time of moulding is 10 ~ 15 seconds, and then utilize cooling water to inject cooling in the color lump mould 10, the time of cooling is 20 ~ 30 seconds, make and connect the color lump raw material and can be cooled to solid-state shape and finalize the design, step can make most and connect color lump according to this, in this step, the color lump raw material that connects before solidifying is to be the melt-flow shape in color lump mould 10, the state of foaming but Shang Weizuo builds bridge.
(2). insert mould, referring to shown in Figure 4, present embodiment be adopt three groups of different colours different densities connect color lump germule 1,2,3, certainly the dealer can freely select to connect the usage quantity of color lump germule 1, these being connect color lump germule 1,2,3 is placed in one in the bottom die 20 one by one again, bottom die 20 has a die cavity 21 according to the net shape at the end in the shoes in being somebody's turn to do, make these connect color lump germule 1,2,3 and insert correct corresponding precalculated position in die cavity 21, for example the place ahead toe cap position, side arch of foot position and rear heel position or the like respectively.
(3). common shooting foaming, referring to shown in Figure 5, when all connect color lump germule 1,2,3 all insert in behind bottom die 20 location, next the operation of just can foaming, the board that uses is the EVA Jet forming machine, the allotment another kind is different from these and connects color lump germule 1,2, the ethylene vinyl acetate co-polymer (EVA) of 3 density prescription composition is as bulk stock 4, utilize this make-up machine centering bottom die 20 to carry out ejection formation operation (or mode of employing batch turning moulding), referring to shown in Figure 6, in this step, bulk stock 4 connects color lump germule 1 with all, 2, the 3rd, in the die cavity 21 of middle bottom die 20, combine, what the producer need consider is the time that the relevant prescription of control is built bridge and foamed, allow bulk stock 4 and these connect color lump germule 1,2,3 can reach bridge formation with the time, foaming, the forming temperature of bottom die 20 is at 160 ~ 180 ℃ in the control, and the molding time that foaming is built bridge is about 6 ~ 7 minutes.
(4). delivery, treat that whole foaming operation finishes after, bottom die 20 can be taken out end semi-finished product in opening, and at last should semi-finished product of the middle end puts into the tunnel type baking oven typing of being lowered the temperature, the time is no more than 15 seconds.
(5). finished product of the middle end after above-mentioned steps, just can obtain the finished product of the middle end 30 of final size, as shown in Figure 7.
Referring to shown in Figure 8, the present invention has a preferred embodiment can make the middle bottom structure of polychrome and multi-density in addition, different with a last embodiment is in manufacturing the first step that connects the color lump germule, present embodiment is via the prescription finishing, or the structural change of color lump mould, can adjust the color and the hardness that connect the color lump raw material, in order to mold have double-colored or three looks connect color lump germule 5,6, come again according to normal process of the present invention, to connect color lump germule 5,6 insert common foaming in the middle bottom die, so just can make the structure of the middle ends 40 that has the polychrome multi-density equally.
Claims (2)
1. the shooting foaming method for making at the end in the multi-density ethylene vinyl acetate co-polymer is characterized in that comprising the following steps:
(1). manufacturing not, foaming connects color lump: at first make with an ethylene vinyl acetate co-polymer allotment with predetermined density prescription composition and connect the color lump raw material, ejection formation one connects the color lump germule in a color lump mould, the forming temperature of control color lump raw material is near 100 ℃, molding time is 10 ~ 15 seconds, be 20 ~ 30 seconds cool time, in this step, but connecing the color lump raw material is to reach flowing forming the state that does not reach the foaming of building bridge;
(2). insert mould: then the individual color lump germule that connects of majority is placed in one in the bottom die, bottom die has a die cavity of the net shape at the end in the corresponding shoes in this, make these several connect the color lump germule and insert correct corresponding precalculated position in die cavity;
(3). common shooting foaming: connect these several color lump germule insert in after the bottom die, again allotment another kind of be different from these several connect the ethylene vinyl acetate co-polymer of color lump germule density prescription composition as bulk stock, utilize make-up machine centering bottom die to penetrate operation, in this step, it is that common foaming and building bridge each other combines in middle bottom die that bulk stock and all connect the color lump germule, the forming temperature of bottom die is at 160 ~ 180 ℃ in the control, and the molding time that foaming is built bridge was at 6 ~ 7 minutes;
(4). delivery: after the foaming operation finished, bottom die was taken out end semi-finished product in opening, and should put into baking oven cooling typing by semi-finished product of the middle end at last, and the time is no more than 15 seconds;
(5). end finished product in making.
2. the shooting foaming method for making at the end in the multi-density ethylene vinyl acetate co-polymer as claimed in claim 1, it is characterized in that: connect in the color lump germule step manufacturing, can be via the prescription finishing, adjustment connects the color lump germule and has multiple color, hardness or functional multi-density structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100544613A CN100506505C (en) | 2004-07-22 | 2004-07-22 | Process for ejection foaming multi-density vinyl acetate vinyl ester copolymer middle bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100544613A CN100506505C (en) | 2004-07-22 | 2004-07-22 | Process for ejection foaming multi-density vinyl acetate vinyl ester copolymer middle bottom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1724239A CN1724239A (en) | 2006-01-25 |
| CN100506505C true CN100506505C (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100544613A Expired - Fee Related CN100506505C (en) | 2004-07-22 | 2004-07-22 | Process for ejection foaming multi-density vinyl acetate vinyl ester copolymer middle bottom |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100196610A1 (en) * | 2007-05-29 | 2010-08-05 | Sheng-Shu Chang | Method of container with heat insulating surface layer |
| CN102825816B (en) * | 2012-08-21 | 2015-01-28 | 东莞乔鸿鞋业有限公司 | Manufacture method for one-step foam molding of three-density sole |
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Granted publication date: 20090701 Termination date: 20180722 |