CN108621354A - Continuity foamed material press moulding method - Google Patents

Abstract

A kind of continuity foamed material press moulding method includes：(A) prepare a mixing device, the mixing device includes a batch mixing seat, an and overhead guard, there are one kneading chambers for the batch mixing seat tool, there are one the extraneous openings of connection for kneading chamber tool, one raw material is placed in the mixing chamber from the opening, the mobile overhead guard simultaneously closes the opening, forms a confined space；(B) air in the confined space is drawn to a predetermined value and kept；(C) raw material of the mixing chamber is heated and is stirred, and obtaining one can foamed plastic；(D) the mobile overhead guard makes the opening not be closed, and the energy foamed plastic is taken out；(E) prepare a molding machine, enable foamed plastic base at the beginning of expansion molding in the molding machine can foam for one；(F) after by the just base foaming that can foam for a foaming body, cool down sizing under a pressure control environment.

Description

Continuity foamed material press moulding method

Technical field

The present invention relates to a kind of forming methods of foamed, more particularly to a kind of process for being fabricated into foaming from raw material Exclude foamed forming method of the air without influencing follow-up finished-product volume size.

Background technology

Existing EVA foamed shoe soles processing procedure is usually first to produce the original that can foam in the environment of not complete pressure control After material, it is shaped to the just base that can foam in a manner of injection, then the first base of capable of foaming is placed in hot-pressing and foaming mold In die cavity, generate crosslinking, foamable reaction and obtain a foaming body.

However, when making the energy foaming raw material, existing processing procedure be typically under an open space (non-pressure control) into The stirring of row raw material, therefore many air can be stirred into together, in addition, the surface of the energy foaming raw material is easy due to wet environment Steam is attached, enables to be shaped to be mixed into steam during the just base that foams, furthermore, when the just base foaming that can foam is to be somebody's turn to do Foaming body, and be the sizing that cools down in the environment of a non-pressure control by the foaming body from after hot-pressing and foaming mold taking-up, it is preposition Mixed air makes the volume size of the foaming body that can be influenced by external atmospheric pressure in the process, when extraneous atmospheric pressure When smaller, the volume expansion of the foaming body is more, and when extraneous atmospheric pressure is larger, the volume expansion of the foaming body is less, Cause the foaming body cooling sizing after volume cause not of uniform size, not only cause yield bad, also make entire manufacturing process when Between elongate, increase the cost of making.

It can be learnt via above-mentioned, existing EVA foamed shoe soles processing procedure is either in the making of foaming raw material, the making of first base And the molding of last foaming body does not exclude to be mixed into this of air and causes the factor of follow-up finished-product volume size variation.

Invention content

The purpose of the present invention is to provide a kind of processes for being fabricated into foaming from raw material to exclude to be mixed into air this shadow Ring changes of volume size because processing procedure, to promote manufacturing yield and shorten making working hour.

The continuity foamed material press moulding method of the present invention, comprises the steps of：

(A) prepare a mixing device, the mixing device include a pedestal, a batch mixing seat for being set to the pedestal, One stand for being set to the pedestal and an overhead guard that can be movably set to the stand, there are one be kneaded for the batch mixing seat tool Room, there are one the extraneous openings of connection for kneading chamber tool, and a raw material is placed in the mixing chamber, the mobile overhead guard from the opening And the opening is closed, form a confined space.

(B) air in the confined space is extracted out, is stopped after the pressure in the confined space reaches scheduled numerical value It is evacuated and keeps the numerical value.

(C) raw material of the mixing chamber is heated and is stirred, and obtaining one can foamed plastic.

(D) the mobile overhead guard makes the opening not be closed, and the energy foamed plastic is taken out.

(E) prepare a molding machine, enable the foamed plastic in be shaped in the molding machine one can foam at the beginning of base.

(F) after by the just base foaming that can foam for a foaming body, cool down sizing under a pressure control environment.

The continuity foamed material press moulding method of the present invention, step (E) include substep：

(E-1) molding machine includes first forming unit, vacuum drying group that there are one first forming unit tools, And one first set of molds, there are one the first upper molds and one in contrast to the first of first upper mold for first set of molds tool Lower mold；

(E-2) it after the energy foamed plastic is by the vacuum drying group, injects this first upper and lower mold and is closed to be formed one A first die cavity is simultaneously shaped to the just base that can foam；

(E-3) by the first upper and lower mold open；And

(E-4) the just base that can foam is taken out.

The continuity foamed material press moulding method of the present invention also includes a sub-steps before sub-step E-4：

(E-5) enable the first base that foams in cooling in first time mold.

The continuity foamed material press moulding method of the present invention also includes a step before step F：

(G) molding machine includes second forming unit, and there are one room, a settings for second forming unit tool It is set to indoor voltage-controlled group of the appearance in indoor second set of molds of the appearance and one, there are one second for second set of molds tool Upper mold and a twoth lower mold in contrast to second upper mold, there are one on pallet and an energy for the voltage-controlled group of tool The gas-tight enclosure of lower movement, the pallet can define an accommodating space jointly with the gas-tight enclosure, which is somebody's turn to do Twoth upper and lower mold is closed second die cavity to be formed.

The continuity foamed material press moulding method of the present invention, step (F) include substep：

(F-1) base at the beginning of enabling this foam is the foaming body in expansion molding in second die cavity；

(F-2) foaming body is placed in the accommodating space, a pressure is applied to the accommodating space and forms the pressure control Environment, and a fixed temperature is maintained, make foaming body cooling sizing；And

(F-3) foaming body is taken out.

The beneficial effects of the present invention are：The energy foamed plastic is made in the environment of a pressure control, and being mixed into this can send out Air total amount in foamed material is limited, therefore energy foamed plastic foaming is volume energy reflation after the first base that can foam Degree of convergence is limited, and is the molding that cools down under a pressure control environment after in addition, this can foam, just base foaming is the foaming body, Therefore the foaming body will not be changed the situation for being influenced, and having not of uniform size of volume, Ke Yi great by external atmospheric pressure Width promotes manufacturing yield and shortens working hour, reduces the cost of manufacture.

Description of the drawings

The other features and effect of the present invention, will clearly be presented in the embodiment with reference to schema, wherein：

Fig. 1 is a flow chart of one embodiment of continuity foamed material press moulding method of the present invention；

Fig. 2 is an illustrative view of a mixing device used by the embodiment；

Fig. 3 is another illustrative view of the mixing device；

Fig. 4 is another illustrative view of the mixing device；

Fig. 5 is the illustrative view of first forming unit of a molding machine used by the embodiment；

Fig. 6 is an illustrative view of second forming unit of the molding machine；

Fig. 7 is another illustrative view of second forming unit；

Fig. 8 is another illustrative view of second forming unit；And

Fig. 9 is another illustrative view of second forming unit.

Specific implementation mode

As shown in Figure 1, one embodiment of continuity foamed material press moulding method of the present invention is to manufacture sole foaming Object explains, which comprises the steps of：

Step S100：Cooperation prepares a mixing device 1 refering to Fig. 2,3, which includes a pedestal 11, one A 12, stands 13 for being set to the pedestal 11 of the batch mixing seat for being set to the pedestal 11 and one can movably be set to this The overhead guard 14 of stand 13, the batch mixing seat 12 tool is there are one kneading chamber 121, and there are one the extraneous openings of connection for the kneading chamber 121 tool 122, a raw material A is placed in from the opening 122 in the kneading chamber 121, the mobile overhead guard 14 simultaneously closes the opening 122, is formed One confined space 123.In the present embodiment, which includes EVA plastics, foaming agent and bridging agent.

Step S101：Air in the confined space 123 is extracted out, is waited in the confined space 123 refering to Fig. 3 by cooperation Pressure stops being evacuated and keeps the numerical value after reaching scheduled numerical value.

Step S102：The raw material A in the kneading chamber 121 is heated and is stirred refering to Fig. 3,4 by cooperation, and is obtained One can foamed plastic B.

Step S103：Refering to Fig. 4, the mobile overhead guard 14 makes the opening 122 not be closed for cooperation, and by the energy foamed plastic B takes out.

Step S104：Cooperation prepares a molding machine 2 refering to Fig. 5, which includes that one first molding is single Member 21, there are one vacuum drying group 211 and first set of molds 212, first set of molds for first forming unit 21 tool There are one the first upper mold 213 and first time molds 214 in contrast to first upper mold 213 for 212 tools.

Step S105：Cooperation is attached to table refering to Fig. 4,5, the energy foamed plastic B by the vacuum drying group 211, removal The steam in face, and inject the first upper and lower mold 213,214 in a manner of injection in the state of pressure control and be closed one formed First die cavity 215, and it is shaped to the just base C that can foam.

Step S106：Enable the first base C that foams in cooling in first time mold 214.

Step S107：Take out the just base C that can foam.

Step S108：Refering to Fig. 6, which further includes second forming unit 22 for cooperation, and second molding is single The second set of molds 222 that 22 tool of member is set in the room 221 there are one room 221, one and one are set to the room Voltage-controlled group 223 in 221, there are one the second upper molds 224, one in contrast to second upper mold for second set of molds 222 tool 224 second time mold 225 and four is respectively arranged at the heating tube 226 of second upper mold 224 and second time mold 225, This voltage-controlled group 223 tool there are one pallet 228 and a gas-tight enclosure 229 that can be moved up and down by the just base C that can foam be placed in this Two upper and lower molds 224,225 are closed second die cavity 227 formed.

Step S109：The second upper and lower mold 224,225 is heated to refering to Fig. 7 using the heating tube 226 by cooperation 165 DEG C or more, the just base C that foams is enable to be shaped to a foaming body D in crosslinking, foaming and intumescing in second die cavity 227.

Step S110：Cooperation takes out foaming body D and is placed in voltage-controlled group 223 of the pallet 228, this is airtight refering to Fig. 8 Cover 229 moves down and defines an accommodating space 230 jointly with the pallet 228, applies a pressure to the accommodating space 230 Power forms a pressure control environment, and maintains a fixed temperature, makes foaming body D in cooling sizing in the accommodating space 230.

Step S111：The gas-tight enclosure 229 is moved up, and take out foaming body D, can be had refering to Fig. 9 by cooperation There is the finished product of the plastotype decorative pattern of second set of molds 222.

Via above explanation, advantages of the present invention can be summarized as follows again：

1. the present invention controls the air total amount for being mixed into the energy foamed plastic B the step of initial raw material makes, in addition, Energy foamed plastic B can by the vacuum drying group 211, by the steam removal of attachment and inject in the state of pressure control this first Die cavity 215 is shaped to the just base C that can foam, furthermore, foaming body D is the sizing that cools down under the pressure control environment, foaming body D Volume variation will not be generated with the change of external atmospheric pressure such as existing skill, whereby the present invention either from the energy The making of foamed plastic B, the molding of the first base C that can foam and the cooling sizing of foaming body D, exclusion are mixed into air and cause Manufacturing yield, can be promoted to close to 100% by this factor of follow-up finished-product volume variation.

2. as described in 1, since the volume of foaming body D will not be produced such as existing skill with the change of external atmospheric pressure Changing not will produce defective products, therefore is subsequently not required to such as existing skill and defective products is carried out the secondary processing of edging, the number of moving back The step of handling, defective products is become standard items promotes the competition of shipment so the present invention, which can effectively shorten, makes working hour Power.

In conclusion continuity foamed material press moulding method of the present invention has preferable manufacturing yield, it can shorten and make work When, the cost of manufacture is reduced, so the purpose of the present invention can be reached really.

As described above, only the embodiment of the present invention is when cannot be limited the scope of implementation of the present invention with this, i.e., all According to simple equivalent changes and modifications made by claims of the present invention and description, all still belong to the scope of the present invention.

Claims (5)

1. a kind of continuity foamed material press moulding method, it is characterised in that：It comprises the steps of：

(A) prepare a mixing device, the mixing device include a pedestal, a batch mixing seat for being set to the pedestal, one The stand and an overhead guard that can be movably set to the stand, kneading chamber that there are one the batch mixing seat tools for being set to the pedestal are somebody's turn to do There are one the extraneous openings of connection for kneading chamber tool, a raw material are placed in the mixing chamber from the opening, the mobile overhead guard simultaneously seals The opening is closed, a confined space is formed；

(B) air in the confined space is extracted out, stops pumping after the pressure in the confined space reaches scheduled numerical value And keep the numerical value；

(C) raw material of the mixing chamber is heated and is stirred, and obtaining one can foamed plastic；

(D) the mobile overhead guard makes the opening not be closed, and the energy foamed plastic is taken out；

(E) prepare a molding machine, enable the foamed plastic in be shaped in the molding machine one can foam at the beginning of base；And

(F) after by the just base foaming that can foam for a foaming body, cool down sizing under a pressure control environment.

2. continuity foamed material press moulding method according to claim 1, it is characterised in that：Step (E) includes following Sub-step：

(E-1) molding machine includes first forming unit, and there are one vacuum drying group and for first forming unit tool One set of molds, there are one the first upper mold and first time molds in contrast to first upper mold for first set of molds tool；

(E-2) it after the energy foamed plastic is by the vacuum drying group, injects the first upper and lower mold and is closed to be formed one first Die cavity is simultaneously shaped to the just base that can foam；

(E-3) by the first upper and lower mold open；And

(E-4) the just base that can foam is taken out.

3. continuity foamed material press moulding method according to claim 2, it is characterised in that：Before sub-step E-4 also Including a sub-steps：

(E-5) enable the first base that foams in cooling in first time mold.

4. continuity foamed material press moulding method according to claim 1, it is characterised in that：Also include before step F One step：

(G) molding machine includes second forming unit, and there are one room, one to be set to this for second forming unit tool Hold indoor second set of molds and one is set to indoor voltage-controlled group of the appearance, there are one the second upper molds for second set of molds tool Tool and second time mold in contrast to second upper mold, there are one pallets and one to move up and down for the voltage-controlled group of tool Gas-tight enclosure, the pallet and the gas-tight enclosure can define an accommodating space jointly, by the just base that can foam be placed in this on second, Lower mold closed at second die cavity.

5. continuity foamed material press moulding method according to claim 4, it is characterised in that：Step (F) includes following Sub-step：

(F-1) base at the beginning of enabling this foam is the foaming body in expansion molding in second die cavity；

(F-2) foaming body is placed in the accommodating space, a pressure is applied to the accommodating space and forms the pressure control environment, And a fixed temperature is maintained, make foaming body cooling sizing；And

(F-3) foaming body is taken out.