CN108943558A

CN108943558A - The mould process method of foaming macromolecular object

Info

Publication number: CN108943558A
Application number: CN201710371785.7A
Authority: CN
Inventors: 陈璟浩
Original assignee: Otrajet Inc
Current assignee: Otrajet Inc
Priority date: 2017-05-24
Filing date: 2017-05-24
Publication date: 2018-12-07

Abstract

The mould process method of foaming macromolecular object provided by the present invention is to accommodate the mixture of macromolecule raw material and foaming agent with mould room space provided by mold and be molded as molded articles with reservation shape, and its technical injection molded shapes for being characterized in that the mould room space is made to be different from the molded articles with a shape before the mixture is full of space, and after the mixture is full of the mould room space, then change the local shape in the mould room space, change the shape in the mould room space to a molded shape identical with the molded articles from the injection molded shapes, can the part caused by the change by the mould room space local shape volume variation, change the surface force (Surface force) applied to the mixture accommodated.

Description

The mould process method of foaming macromolecular object

Technical field

The present invention is related with Process Technology of Polymer technology, especially with regard to a kind of mould process method of foaming macromolecular object.

Background technique

Known macromolecule foaming technology, by foaming agent because of chemical reaction, thermal decomposition or phase change inside macromolecule Etc. modes generate bubble, to form most abscesses inside macromolecule, be allowed to form foaming body, and there is low-density, low Many characteristics such as cost, heat-insulated, sound insulation, impact resistance, for the utilization in industry.

It is pointed out in previous research, the physical property of foaming body is influenced by the size and density of abscess, and the growth of abscess is then It is related with the diffusion coefficient of temperature, pressure, pressure release rate, impregnation time and foaming agent etc., wherein to be pointed out in nucleation theory, more Caused pressure drop of the big pressure in moment pressure release is bigger so that volume free energy decline, and enable foaming agent easier into Enter in polymer base material, meanwhile, the change of pressure drop rate will also result in the change of cell density, and pressure is also indicated that in previous research Reduction of speed rate with there is also positive to be associated between nucleation rate, in an experiment, when pressure drop rate from 0.0162MPa/s speed to When 0.5MPa/s, the density of formed abscess will be made to increase by 10⁶Times, it follows that by the control of pressure drop size and rate, It can change the size and density of abscess, in known technology, control pressure drop size and rate, though it can change inside foaming body Cell size and density, but its control with regard to foaming body entirety for it, therefore, be formed by cell density and size still only For single distribution, be still difficult in the inside of manufactured foaming body entirety in same molding process, formation different scale or The abscess of different densities.

And be that the inside of foaming body is made to can have various sizes of abscess, in Chinese No. 103128973 patent case In, that is, disclosing has and first macromolecule raw material will be made to melt and be shaped to germule, after being placed into autoclave, then supercritical fluid is injected In autoclave, and respectively in a lower saturation temperature and a higher blowing temperature, after maintaining several time respectively, Quick pressure release is carried out, the inside of foaming body is made to form various sizes of abscess accordingly, several physical property of foaming body is promoted, is Though cause the technology of different size cells to may achieve its purpose inside foaming body from the synergistic effect of heating by pressure release, its It must pass through autoclave and the regulation that the huger energy carries out temperature need to be expended, then show non-economy, meanwhile, though it can foam The abscess that the inside of body forms the different sizes such as various sizes of abscess, but this is still distributed in the inside of foaming body entirety, and nothing Method is controllably respectively distributed in the different blocks of foaming body.

Summary of the invention

Therefore, the main purpose of the present invention is to provide a kind of mould process method of foaming macromolecular object, can make to send out Polymer is steeped in the different blocks position of one-time formed foaming body entirety, the bubble with different sizes or different densities Hole has difference to make the physical property at the different blocks position of foaming body entirety to each other.

Edge is that reach above-mentioned purpose, the mould process method of foaming macromolecular object provided by the present invention is to make macromolecule The mixture of raw material and foaming agent is accommodated with mould room space provided by mold and is molded as mould with reservation shape Article processed, and its it is technical be characterized in that making the mould room space that there is a shape to be different from before the mixture is full of space should The injection molded shapes of molded articles, and after the mixture is full of the mould room space, then change the local shape in the mould room space, according to So that the shape in the mould room space changes from the injection molded shapes to a molded shape identical with the molded articles, can pass through The volume variation of the part caused by the change of the mould room space local shape, what change applied the mixture accommodated Surface force (Surface force).

Wherein, the locular wall for the part that the change of the surface force is changed by the mould room spatial form, because of shift in position institute shape At.

Wherein, when the variation of the mould room space local shape causes the increase of the local volumetric, thus what reduction was applied The surface force.

Wherein, when the variation of the mould room space local shape causes the reduction of the local volumetric, thus what increase was applied The surface force.

Physical property to have the different blocks position of molded articles entirety can make in response to needed for actual use The mould room receives the part of shape change as majority, and the volume variation for the majority part for changing those by shape, can be all Increase or be all reduce, or a part be increase and he is partially reduction.

In addition, the foaming agent can be for chemically or physical foaming agent, wherein using supercritical fluid as foaming agent and with Macromolecule raw material is the mixture of single phase soln, can be used as specific preferred application example of the invention.

The beneficial effects of the present invention are:

The present invention provides a kind of mould process method of foaming macromolecular object, passes through the quantitative mixing to mould room is had been filled with Object, the reduction of partial volume caused by the change by mould chamber shape part increase, or make that a part is reduced and he is partially The volume variation of increase etc. can carry out the specific shape mechanograph for intending molding, on specific position to control mechanograph There is expected physical property on expected position.

Detailed description of the invention

Fig. 1 is a preferred embodiment of the present invention mold exploded view.

Fig. 2 is a preferred embodiment of the present invention mold perspective view.

Fig. 3 is a preferred embodiment of the present invention die cut view.

Fig. 4 is a preferred embodiment of the present invention a flow diagram.

Fig. 5 is a preferred embodiment of the present invention another flow diagram.

Appended drawing reference

10: mold；20: the first mould bodies；21: the first body portions；22: the first die faces；30: the second mould bodies；31: the second body portions； 32: the second die faces；40: mould room；41: part；50: movable part；51: matrix；52: adjustment end face；53: all lateral mass faces；A: Mixture；A ': part mixes.

Specific embodiment

It hereby lifts with preferred embodiments of the present invention, and cooperates attached drawing for detailed description.

Firstly, the molding of foaming macromolecular object provided in present pre-ferred embodiments adds shown in please referring to Fig.1 to Fig.3 For work method by a mold 10 to implement, which is multiple layers of molds common in macromolecule moulding forming processing technology, and One first mould body 20, one second mould body, 30, two mould rooms 40 and two movable parts 50 are constructively contained.

The first mould body 20 has a first plate-like body portion 21, and one first die face 22 is located at the one of the first body portion 21 In lateral plates.

The second mould body 30 then has the second body portion 31 of a plate block, and one second die face 32 is located at the second body portion 31 In the plate face of side.

Wherein, the first mould body 20 and the second mould body 30 to each other can be opposite between a die-closed position and a die sinking position Displacement is opposite in this between the first mould body 20 and the second mould body 30 when being located on the die-closed position with first die face 22 Second die face, 32 ground repeatedly connects fitting each other, and the respectively mould room 40 is formed between first die face 22 and second die face 32, and make Those mould rooms 40 are in closed, and when being located on the die sinking position, then make the first mould body 20 and the second mould body 30 that This separation makes first die face 22 and second die face 32 make those mould rooms 40 in open state away from each other accordingly.

Those movable parts 50 are respectively provided with a block-like matrix 51, are slidedly arranged in the first body portion 21, and can be in an injection molding Shift reciprocately between position and a mold position, one adjustment end face 52 is located on the side of the matrix 51, and with first die face 22 It is adjacent；

In the case where the first mould body 20 and the second mould body 30 are located at the molding state of the die-closed position, when those matrixes 51 When in the mold position, as shown in Figure 3 be located at right side movable part, respectively the adjustment end face 52 respectively with those the first die faces 22 The side locular wall of those mould rooms 40 is collectively constituted, and makes those mould rooms 40 that there is molding shape identical with preset mechanograph Shape, conversely, being then located at the movable part in left side as shown in Figure 3 when the matrix 51 is located on the injection molding position, making the adjustment end face 52 protrude from outside first die face 22, so that removing the side locular wall of the mould room 40 includes first die face 22 and the adjustment end It outside face 52, has further included on the matrix 51, adjacent all lateral mass faces 53 with the adjustment end face 52, and then has made the mould room 40 Spatial form be different from the molded shape an injection molded shapes.

Whereby, the mould process method of the foaming macromolecular object implement when, as shown in Figure 4 as, make the first mould body 20 It is located under molding state with the second mould body 30, is located on the injection molding position with the season matrix 51, makes the mould room 40 accordingly Spatial form is the injection molded shapes, then by external such as ejaculator or extruder, by the macromolecule raw material mixed and foaming agent Mixture a be sent into the mould room 40, until be full of 40 space of mould room, followed by, then keep the matrix 51 past from the injection molding position The mold position is mobile, to make the matrix 51 sink in the first body portion 21, to change the mould room 40 corresponding to the matrix 51 The local shape at place position makes the spatial form of the mould room 40 molded shape, and makes the part 41 of the mould room 40 Volume is extended because the matrix 51 is sunk in the first body portion 21, so that the part mixing being located in the part 41 Object a ' is reduced because of the increase of 41 volume of part bears the surface that the locular wall from the mould room part 41 is applied Power, in the case where surface force reduces, part mixes a ' internal abscess can reduce bubble because of the reduction of external pressure Hole nucleation or the resistance of growth, in this way, the mechanograph moulded by the mould room 40 can be made, because should 41 shape of part The variation of shape, and the abscess that different sizes or different densities are formed in whole different parts is to generate different physical property Mechanograph etc. more physical property can be made to the product such as protecting ware for sports, be allowed to be formed intermediate tool preferably elasticity and side tool compared with More physical property protector of good hardness, simultaneous and durable and protecting effect.

It is aforementioned to take off the overall volume for making the mould room 40 when it is located at injection molded shapes, it is less than it and is being located at the molded shape When volume, and with increase by 40 local volumetric of mould room be its local shape variation result.

Conversely, can also make be located at the injection molded shapes under mould room volume, greater than be located at the molded shape under mould room volume, Its specifically i.e. have as shown in Figure 5 as, 40 space of mould room that mold 10 has, under injection molded shapes, in the matrix of middle empty frame shape 51 be in settling phase, and so that the volume of mould room 40 is greater than 40 volume of mould room being located under the molded shape and followed by pass through the matrix 51 shift in position risen, change 41 shape of part of the mould room, cause the volume reducing of the part 41, thus Increase the surface force that the locular wall of the mould room part 41 applies the part mixes a ' accommodated, increases the part accordingly The resistance of mixture a ' internal cell nucleation or growth, accordingly, can also reach keeps the mechanograph of molding whole in different portions Have the effect of different physical property on position.

To sum up old, the macromolecule in the mould process method of foaming macromolecular object provided by the present invention, in the mixture No matter the type of raw material and foaming agent, and the non-principal key technology content for influencing the specific effect of the present invention and reaching, foamed Using chemically or physical, foam nucleation and growth theoretically have no difference for agent, and the present invention is by having been filled with mould The batch of room, the reduction of partial volume caused by the change by mould chamber shape part increase, or subtract a part Less and he partially be increase etc. volume variation, can to intend mould specific shape mechanograph be carried out on specific position, There is expected physical property, for known technology, skill provided by the present invention on expected position to control mechanograph Art content really can effectively supply the deficiency of known technology, and can have foaming macromolecular object in future and more widely answer With.

Claims

1. a kind of mould process method of foaming macromolecular object makes the mixture of macromolecule raw material and foaming agent in the sky of a mould room It is interior to be molded as molded articles with reservation shape, which is characterized in that before space of the mixture full of the mould room, Make the overall space shape of the mould room different from an injection molded shapes of the molded articles shape, and is full of the mould in the mixture Behind the space of room, begin the local shape for changing the mould room, and the overall space shape of the mould room is made to be identical to the molded articles shape One molded shape of shape, and with the volume variation of the part caused by the change of the local shape of the mould room changes to being accommodated The surface force that is applied of the mixture.

2. the mould process method of foaming macromolecular object as described in claim 1, which is characterized in that the local shape of the mould room changes Alter into the increase of local volumetric.

3. the mould process method of foaming macromolecular object as described in claim 1, which is characterized in that the local shape of the mould room changes Alter into the reduction of local volumetric.

4. the mould process method of foaming macromolecular object as described in claim 1, which is characterized in that the mould room has at least two innings Portion's shape changes.

5. the mould process method of foaming macromolecular object as claimed in claim 4, which is characterized in that the change of the local shape point The reduction and increase of local volumetric are not caused.

6. the mould process method of foaming macromolecular object as described in claim 1, which is characterized in that the foaming agent is physical hair Infusion.

7. the mould process method of foaming macromolecular object as claimed in claim 6, which is characterized in that the foaming agent is shooting flow Body.

8. the mould process method of foaming macromolecular object as described in claim 1 takes a mold to implement, feature exists In the mold includes:

One first mould body has one first die face；

One second mould body can repeatedly be connected to first mould, have one second die face, be opposite in first die face, and make the mould Room is between first die face and second die face；

One movable part has a matrix, is slidedly arranged in the first mould body, and can be reciprocal between an injection molding position and a mold position Displacement, an adjustment end face are located at the side of the matrix, and as a part for constituting the mould room locular wall, when the matrix is located at the mould When on position processed, make the spatial form of the mould room molded shape, when the matrix is located on the injection molding position, makes the mould room Spatial form be the injection molded shapes.

9. the mould process method of foaming macromolecular object as claimed in claim 8, which is characterized in that the matrix is from the mold position When mobile toward the injection molding position, keep the adjustment end face mobile from first die face toward the direction for being opposite in second die face.

10. the mould process method of foaming macromolecular object as claimed in claim 8, which is characterized in that the matrix is from the molding position When setting mobile toward the injection molding position, make the adjustment end face from first die face toward opposite to each other in the movement of the direction of second die face.