CN109278235A

CN109278235A - The compression-moulding methods of macromolecule foaming article

Info

Publication number: CN109278235A
Application number: CN201710597960.4A
Authority: CN
Inventors: 陈璟浩
Original assignee: Otrajet Inc
Current assignee: Otrajet Inc
Priority date: 2017-07-20
Filing date: 2017-07-20
Publication date: 2019-01-29

Abstract

The compression-moulding methods of macromolecule foaming article provided by the present invention, it is for the germule article that makes to foam is compared to intended molding finished form, have the redundancy different from finished form prominent on privileged site, and with molding die to the foaming germule impose reheating melt moulding when, the redundancy that contracts is forced in addition and is protruded increases density to reduce volume, finished product to make molding complete is big than other positions in the density relative to the redundancy protruding parts, allow the finished product that there is different density in different parts accordingly, in response to the demand in actual use.

Description

The compression-moulding methods of macromolecule foaming article

Technical field

The present invention is related with Polymer Processing technology, especially with regard to a kind of compression molding of macromolecule foaming article Method.

Background technique

Such as foamed thermoplastic polymers such as ethylene-vinyl acetate copolymers (Ethylene Vinyl Acetate, EVA) Object causes it in the need for meeting actual product still difficult after once molding foaming due to being difficult to control the multiplying power of its foaming It asks, and need to can just obtain the industrialization product of stay in grade after the molding secondary operation of heating and mould pressing again, and known In technology, to the method that the foamed of time processing carries out secondary operation, specific technology contents are just like China the It is disclosed in CN1074856A patent, through the molding foaming germule of time processing program institute, make it on size and shape It is comparable to the size and shape of finished product, then, then heating and mould pressing and cooling will be carried out in foaming germule merging secondary operation mold The secondary operation program of sizing can make germule so heated that be shaped as having again by the heating and mould pressing program of the secondary operation There is the finished product of pre-set dimension and shape, it is multiple to be fixed through cooling.

Wherein, to ensure that finished size through secondary operation program and shape maintain consistent stability, have and finished product The mould room space of the consistent secondary operation mold of size and shape need to be filled up with the foaming germule, begin may insure The finished product integrality being molded through the secondary operation mold, but the known finished product being molded is waited, it is only capable of having single One density, and can not have different density in different parts.

Furthermore, it is understood that make finished product in physical property of the different parts with different densities, it is known that technology is taken off, and is By the different foaming germule with different expansion ratios or density, while the same mould room space for the secondary operation mold that is placed in In, then by secondary operation program above-mentioned, making different foaming, just indusium melts again and is moulded into one and is finished product, is etc. to pass through spelling Gather resulting multi-density finished product, it is in quality and non-ideal, still have much room for improvement.

Summary of the invention

Edge is that the main object of the present invention is providing a kind of compression-moulding methods of macromolecule foaming article, makes to send out For steeping germule article compared to intended molding finished form, have the redundancy different from finished form prominent on privileged site Out, and when imposing reheating to the foaming germule with molding die and melting moulding, it is prominent to reduce volume that the redundancy that contracts is forced in addition And increase density, so that the finished product for completing molding is big than other positions in the density relative to the redundancy protruding parts, Allow the finished product that there is different density in different parts accordingly, in response to the demand in actual use.

Edge is, to reach above-mentioned purpose, the compression-moulding methods of macromolecule foaming article provided by the present invention, in step Include:

Step a, a molding tool is taken

There is the molding die a molding room, extension die room connection adjacent with the shaping mould room, and internal diameter to be less than should The internal diameter of shaping mould room, a movable part can be movable in the extension die room by external force.

Step b, filler after die sinking

The molding die is opened, and the germule article of preparatory foaming is inserted in the molding die, wherein this is first Embryo article has molding one first block integral with one another and one second block, and first block is made to be located at the shaping mould room In, and the part that second block protrudes from first block is outer, and is located in the extension die room, and between first block with Between the movable part.

Step c, modeling is melted after molding again

Make the molding die mold, and to offer thermal energy and pressure, make accordingly the germule article melted by heating with again by Moulding, and keep the movable part movable in the extension die room with external force, to compress second block, in order to should by the molding die Germule article melt again modeling for with the consistent shape of finished product, and maintain the compressed state of second block.

Step d, cooling and shaping

The temperature for having melted the molding germule article of modeling again is reduced, after being allowed to cooling and shaping, opens the molding die simultaneously It is taken out.

By imposing compression to second block to get make to melt again the molding finished product of modeling have on different parts it is different Density, and can be in response to the demand in actual use.

Wherein, when second block is compressed, can be allowed to mobile from the extension die room toward the shaping mould room, thus make this The part of one block is because the entrance of second block is also the same as compressed.

Furthermore volume-diminished and the increased degree of density caused by compressing, change with the ratio of compression, therefore The degree for changing compression can adjust density.

When the movable part is moved to the interface of handover adjacent with the shaping mould room in the extension die room, and this is blocked to prolong When stretching the connection between mould room and the shaping mould room, even if in the space for fully entering the shaping mould room of second block.

The beneficial effects of the present invention are:

The present invention provides a kind of compression-moulding methods of macromolecule foaming article, and the germule article that makes to foam is compared to intending For molding finished form, have the redundancy different from finished form prominent on privileged site, and with molding die pair When the foaming germule imposes reheating and melts moulding, force that the redundancy that contracts is prominent to increase density to reduce volume in addition, to make mould Make the finished product completed in the density relative to the redundancy protruding parts than other positions be it is big, allow the finished product not accordingly There is different density with position, in response to the demand in actual use.

Detailed description of the invention

Fig. 1 is a preferred embodiment of the present invention flow diagram.

Appended drawing reference

10: molding die；11: upper mold；12: lower die；13: shaping mould room；14: extension die room；15: movable part；20: germule Article；21: the first blocks；The part of 211: the first blocks；22: the second blocks；30: finished product.

Specific embodiment

It hereby lifts with a preferred embodiment of the present invention, and attached drawing is cooperated to be further instruction.

As shown in Figure 1, the compression-moulding methods of the macromolecule foaming article provided in a preferred embodiment of the present invention, Include following steps:

Step a, a molding tool 10 is taken

The molding die 10 has self overlapped a upper mold 11 and a lower die 12, and a molding room 13 is on this Between mould 11 and the lower die 12, an extension die room 14 is then set in the lower die 12 and is connected to one end with the shaping mould room 13, interior Diameter and the internal diameter for being less than the shaping mould room 13, one with sliding block is that the movable part 15 constituted is then slidably connected to this with all side end faces in opposite directions and prolongs Stretch the side locular wall of mould room 14, and can be driven by external force and in the extension die room 14 carry out relative to the shaping mould room be by Close or remote from reciprocating linear displacement.

Step b, it is opened

Make the upper mold 11 and the lower die 12 be separated from each other and be spaced to come, thus the open shaping mould room 13 and the extension die Room 14.

Step c, filler

One germule article 20 of preparatory foaming is placed in the molding die 10 that this is in die opening state, and keeps this first One first block 21 of embryo article 20 is located in the shaping mould room 13, while making one second block, 22 projection of the germule article 20 In outside the part 211 of first block 21, and it is embedded in the extension die room 14.

Wherein, first block 21 and second block 22 possessed by the germule article 20, is the original with same composition Material is through being integrally formed made foamed, specifically, the blocks of first block 21 spatially quadrangle, and this second Block 22 is then stretched on outside the part 211 of first block 21.

Step d, it molds

It is closed the upper mold 11 and the lower die 12, thus fill first block 21 in the shaping mould room 13, and Make second block 22 in the extension die room 14, and between the shaping mould room 13 and the movable part 15.

Step e, heating pressurization to melt modeling again

There is provided thermal energy and pressure to the molding die 10 makes the germule article to improve the temperature of the germule article 20 20 can in the mold 10 melted by heating and can by the shaping mould room 13 assign its shape.

Step f, density contrast alienation program

When the degree for melting modeling program again and carrying out of step e, reach when can make the germule article 20 again by the degree of moulding, Power drive movable part 15 other than i.e. keeps the movable part 15 mobile toward 13 direction of shaping mould room, and second block 22 is past The shaping mould room 13 passage, moves into second block 22 in the shaping mould room 13 from the extension die room 14, and with shifting Enter the increase of degree, the part 211 of first block is also constantly squeezed, accordingly, can be by the movable part 15 to this The force of second block 22 compresses second block 22 and the part 211 of first block, and increases those positions Density.

And in the present embodiment, and external force is made constantly to apply external force to the movable part 15, until the movable part 15 is displaced To the interface of the extension die room 14 handover adjacent with the shaping mould room 13, the extension die room 14 and the shaping mould room 13 are being blocked Between while be connected to, i.e., the whole of second block 22 is pushed into the shaping mould room 13, to make the germule article 20 not It can have different density with position.

Step g, cooling

When the germule article 20 the molding die 10 by the shaping mould room 13 mold its shape, while pass through the movable part 15 control second blocks 22 with after the density of the part 221 of first block that is abutted, can by water cooling, air cooling or its His cooling technology means, make being cooled and being formed by the germule article 20 of moulding again, to obtain and the shaping mould room The consistent multi-density finished product 30 of 13 shapes.

Whereby, germule article is in previously fabricated foaming program, though it is whole due to identical expansion ratio not With having similar density on position, but by the implementation of the above method, can make originally only with the germule article of single density, Can have different density on different parts, compared to the known multi-density foam articles manufactured with erection method For, technology contents provided by the present invention are when the quality that can promote finished product.

Additionally, it is known that technology increases germule article volume to ensure that finished product integrality is used, squeeze by it compared with little Rong When the mould room space of long-pending secondary operation mold, because of difference between its volume and volume and little, and it is enough that density can not be made to obtain Change in other words, known technology because of volume and difference in volume, derivative compression effectiveness only belongs to small, and transmission may be not present Therefore volume and difference in volume, for the present invention is stated compared to known skill, should have progress to disclose up to the teaching for changing density Property.

Claims

1. it is internal to be placed in a molding tool by a kind of compression-moulding methods of macromolecule foaming article for the germule article to have foamed A molding room in, and make the germule article in the shaping mould room be heated again melt modeling after cooling and shaping finished product；

It is characterized by:

The molding die has further included an extension die room, connection adjacent with the shaping mould room, and internal diameter is less than the shaping mould room Internal diameter, a movable part can be driven and the activity in the extension die room by external force；

The germule article has molding one first block integral with one another and one second block, and second block is made to protrude from this One part of the first block is outer, and when the germule article is placed in the mould inside, it is located at first block in the shaping mould room, And it is located at second block in the extension die room, and between the movable part and first block；

Make the germule article melt again modeling heating schedule start after, keep the movable part movable in the extension die room with external force, Pressure is applied to second block accordingly, is allowed to mobile toward the shaping mould room, so that second block be made to be compressed.

2. the compression-moulding methods of macromolecule foaming article as described in claim 1, which is characterized in that first block is to fill up The space of the shaping mould room.

3. the compression-moulding methods of macromolecule foaming article as described in claim 1, which is characterized in that second block not by It is the space for filling up the extension die room before movable part compression.

4. the compression-moulding methods of macromolecule foaming article as described in claim 1, which is characterized in that second block is being pressurized It is to be moved in the shaping mould room with one or all from the extension die room when contracting.

5. such as claim 1 or the compression-moulding methods of 4 macromolecule foaming articles, which is characterized in that first block Part be with second block with compressed, and with different from other positions other than the part of first block close Degree.

6. the compression-moulding methods of macromolecule foaming article as described in claim 1, which is characterized in that the movable part make this second The compressed power of block is maintained to the cooling program after carrying out.

7. the compression-moulding methods of macromolecule foaming article as described in claim 1, which is characterized in that first block and this Two blocks are as made by the raw material of same composition.

8. the compression-moulding methods of macromolecule foaming article as described in claim 1, which is characterized in that the movable part is sliding block, And can by the external force driving and carry out reciprocal displacement in the extension die room.