CN100522571C

CN100522571C - Polymer shaping method

Info

Publication number: CN100522571C
Application number: CNB2005100734881A
Authority: CN
Inventors: 陈法胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-19
Filing date: 2005-04-19
Publication date: 2009-08-05
Anticipated expiration: 2025-04-19
Also published as: CN1853912A

Abstract

A high-molecular forming method for the product made of two or more raw materials with different physical or chemical properties includes such steps as using each raw material to make proper blank shape by moulding, putting all blanks in the cavity of a mould, and heating while pressurizing to make them to take part in reaction to become a single finished product.

Description

Polymer shaping method

Technical field

The present invention is dividing an application of No. 200510064490.2 invention, relevant for a kind of polymer shaping method.

Background technology

In No. 200510064490.2 original application case, the applicant discloses to have and is essentially two different inventions, one is claim 1 technology contents of asking according to this of original application case, and another person, then be implied in the specific embodiment and its claim 7 of original application case, and in fact independently invention of back one, the applicant promptly proposes to divide an application with this case.

The polychrome polymer shaping method of taking off in conventional techniques, with vinyl-vinyl acetate copolymer (ethylene-vinylacetate copolymer, EVA) be shaped to example, it is when carrying out the operations for forming of polychrome, have and select three layers of mould mould for use with upper, middle and lower three matrixs, and comply with the operations for forming that following step is carried out the polychrome finished product, see also shown in Figure 1:

A, make these three layers of mould moulds under the matched moulds state, the EVA fused raw material of tool first look is injected between the germule mould chamber between, lower floor's matrix, with moulding first stock with ejecting device;

B, these three layers of mould moulds are positioned under the die opening state, this middle level mould are removed, and this first stock is kept somewhere in the die cavity of this lower floor's matrix;

C, should go up matrix and following matrix and amplexiformed toward each other, make it to be positioned at the matched moulds state, with by the die cavity of this time matrix with this on die cavity of matrix dock each other, and therebetween be formed into the pattern chamber, hereat, this first stock then has been contained in this shaping mould chamber;

D, continue it, with ejecting device the EVA fused raw material of tool second look is injected this shaping mould chamber again, finish the material feeding operation of double-colored EVA according to this.

And, on the known technology taken off, it also can't carry out high-quality polychrome macromolecule manufacturing, trace it to its cause, be according to its method, after making germule with the first chromogen material, because the germule of institute's moulding is the suitable temperature of tool still, and without cooling, therefore, when the second chromogen material that thereupon carries out penetrates program, one because of this germule shape of still easily changing under the effect of temperature, the two then is that the second chromogen material is when ejecting device penetrates, itself also is in the molten condition of high temperature, and be the second look material injecting mould with viscous, also must provide suitable pressure with ejecting device, under the reciprocation each other of above-mentioned three kinds of factors, the second chromogen material that injects can be impacted the first embryo surface that is contacted and be made it distortion unavoidablely, and with this second chromogen material beyond indoor the flowing of shaping mould is deformed into the form range of former germule mould chamber institute moulding, and producing the batch mixing of the first chromogen material and the second look stock yard, the color block ease that causes institute's shaping finished product is from former predetermined scope, the generation bleeding, thus, promptly can not conform to the basic demand of multicolour forming.

Again or have as shown in Figure 2 No. the 089123357th, TaiWan, China " to make the forming method of multi-color rubber " institute takes off, it is identical with above-mentioned conventional techniques, also select for use by last, in, the mould that following three matrixs are formed, precisely because be different from above-mentioned conventional techniques, the formation of its stock is by suitable facility, raw material injected respectively lay respectively at, in and in, in the stock mould chamber between lower floor's matrix, and after moulding, again middle matrix is taken out, and with the upper and lower mould sheet and close therebetween to form a molding chamber, the reaction so that stock continues in this shaping mould chamber is to obtain required finished product; And with regard to these technology contents, though it can overcome the bleed of above-mentioned conventional techniques, move the look disappearance, precisely because disclosed technology contents obviously hinders to some extent for the carrying out of processing procedure, and the safety to the staff also has threat, trace it to its cause, be when being it with stock with the moulding simultaneously of this mould, for formation as waste materials such as the material base of a fruit or runner, promptly must under being the state of die sinking, mould carry out it, in addition this moment, mould still has suitable temperature and exists, therefore the survivor that spreads out of institute, one promptly make the staff also scald because of the high temperature of mould when carrying out the waste material removing, promptly under the still high state of temperature, when making mold open for the removing waste material for a long time, former formed stock is promptly easily because of the effect of temperature and the shape restriction external force that loses the mould chamber for the two, and the disappearance of the shape warpage that easily changes causes the quality that influences follow-up shaped article.

Summary of the invention

Main purpose of the present invention is, a kind of high molecular forming method is provided, and it can reach and improve the quality of making efficient and guaranteeing shaped article.

For reaching above-mentioned purpose, its step of polymer shaping method provided by the present invention includes:

A, take one first matrix, be concaved with first die cavity of desired depth on the lateral plate face of this first matrix;

Take one second matrix, a lateral plate face that is able to a lateral plate face and this first matrix amplexiforms toward each other, in order to the sealing of this first die cavity with in respectively forming stock mould chamber between this first, second matrix;

B, macromolecule raw material is injected this stock mould chamber by the outside, make first stock of correspondingly-shaped;

C, make respectively this first, second matrix separated from one another and be separated by and come, and make this first stock because of being embedded on the lateral plate face that invests this first matrix in this first die cavity;

D, take one the 3rd matrix, a lateral plate face that is able to a lateral plate face and this first matrix amplexiforms in opposite directions, and on the side end face of the 3rd matrix and be provided with the 3rd die cavity of reservation shape, must dock in opposite directions, with in respectively being formed into the pattern chamber between this first, the 3rd matrix with this first die cavity;

Second stock of reservation shape is inserted the die cavity precalculated position of the 3rd matrix;

E, replace this second matrix and amplexiform toward each other with the 3rd matrix, so that respectively this first, second stock amplexiforms in this shaping mould chamber toward each other with this first matrix;

F, make respectively that this first, second stock carries out chemical reaction in this shaping mould chamber, with the molded shaped article of obtaining.

Description of drawings

Fig. 1: the manufacturing flow chart of conventional techniques content.

Fig. 2: the manufacturing flow chart of another conventional techniques content.

Fig. 3: the manufacturing flow chart of a preferred embodiment of the present invention.

The specific embodiment

Below, lift a preferred embodiment of the present invention now, and cooperate graphic being described further, wherein:

See also shown in Figure 3, the polymer shaping method that in a preferred embodiment of the present invention, is provided, its step has comprised to be had:

A, take by three layers of stacked mould that forms 10 of matrix, and be provided with first die cavity 111 of appropriate depth in the unilateral fovea superior of the downside of first matrix 11, in the top side of this second matrix 12 unilateral be provided with second die cavity 121 corresponding with this first die cavity 111, and the 3rd die cavity 131 that is provided with appropriate depth in the unilateral fovea superior of the upside of the 3rd matrix 13, make respectively this matrix 11 to work as, 12,13 self splice when being positioned at the matched moulds state, must by this second die cavity 121 and this first die cavity 111 dock each other with in respectively this first,

second matrix

11,12 form a stock mould chamber 14;

And be to shorten the processing procedure time, this mould 10 can make it to have suitable temperature in present embodiment, in other words, even the temperature of this mould 10 is maintained at more than the reaction temperature of the shaping raw material of intending, spent processing procedure time when avoiding for mould 10 according to this to heating and cooling;

B, be positioned under the matched moulds state in this mould 10, with ejaculator with the suitable macromolecule raw material of outside in being lower than under the reaction temperature after the fusion, inject this stock mould chamber 14 via runner, with by these stock mould chamber 14 molded stocks 21 of winning;

C, this mould 10 is opened, with order separated from one another and the distance that the space is suitable of this

matrix

11,12,13 respectively, and make this first stock 21 because of be embedded at the downside that is attached to this first matrix 11 in this first die cavity 111 unilateral on;

With the traversing and ease of these second matrix, 12 levels beyond the upper and lower displacement actuating range that goes out this first, the

3rd matrix

11,13 respectively;

D, reduce the 3rd die cavity 131 surface temperatures of the 3rd matrix 13 with cryogenic gas, second stock 22 that will have reservation shape is then inserted on the appropriate location of the 3rd die cavity 131;

E, replace these second matrixs 12 and amplexiform with this first matrix 11 with the 3rd matrix 13, so that the 3rd die cavity 131 and this first die cavity 111 dock each other and combine and be formed into pattern chamber 15, and make this second stock 22 relative to joining in this shaping mould chamber 15 with this first stock 21;

F, provide suitable pressure to make this mould 10 be maintained at the matched moulds state, so that the heat energy of mould is passed in these 15 inside, shaping mould chamber gradually, this stock 21,22 reaches on its reaction temperature that is suitable for reacting and make respectively, carrying out chemical reaction, thus the shaped article 20 of molded according to this required form.

About reduce the program of the 3rd die cavity 131 surface temperatures in this d step with fluid; whether the shape of then visual this second stock is subject to temperature action and the factor of being out of shape; and apply for program optionally; in other words, this second stock occupies suitable volume and thickness, and is difficult under the temperature action of short time and during distortion; the program of this surface cooling can be omitted and do not carried out; study carefully as for this fluid which kind of should select for use, then claimed for the original application case, promptly bright for chatting no longer in addition in this.

And by above-mentioned method, the effect that the present invention can reach than known technology then has at least following institute to chat:

One, avoid the situation of batch mixing to produce, because, in the present invention, respectively this stock 21,22 in this shaping mould chamber 15 in conjunction with the time, be not as conventional techniques, under the high pressure effect, to carry out, ought be avoided stock to produce the batch mixing situation that flow-disturbing is given birth to because of flowing relatively in contact surface each other thus.

Two, have under the different colours situation at this stock 21,22 respectively, because of the present invention has the effect of avoiding batch mixing, the defective of promptly being avoided bleeding or moving look.

Three, in the present invention, the moulding before being placed into the 3rd die cavity 131 of this second stock 22, in other words, promptly its appropriate location that only need insert the 3rd die cavity 131 gets final product, and need not on matrix, remove the program of waste material, shorten the time of processing procedure according to this as Shang Yu as the conventional techniques.

Four, owing to carry out the filler program of this second stock 22, belong to simple and easy and can carry out fast compared to the waste material clear program of conventional techniques, therefore, the branch work that can avoid the Long contact time institute between staff and die material to cause injures.

Five, owing to polymer shaping method provided by the present invention, its mould is maintained at more than the reaction temperature of stock, can significantly shorten the whole processing procedure time, is beneficial to make the lifting of efficient, and helps the progress and development of industry.

Claims

1, a kind of polymer shaping method, its step comprises:

2, according to the described polymer shaping method of claim 1, it is characterized in that: respectively this first, second and third matrix is the stacked state of from top to bottom arranging in regular turn, and reaches the unlatching and closure of mould in the mode of upper and lower displacement.

3, according to the described polymer shaping method of claim 2, it is characterized in that: in this f step, so that this second matrix shifts out respectively outside this first, the 3rd matrix butt joint scope, this first, the 3rd matrix is able to upper and lower displacement to reach the matched moulds state that docks combination each other and make respectively.

4, according to the described polymer shaping method of claim 3, it is characterized in that: this d step is positioned under the die opening state separated from one another in this matrix respectively carries out.

5, according to the described polymer shaping method of claim 4, it is characterized in that: in this d step, reduce the 3rd die cavity surface temperature of the 3rd matrix earlier with fluid, again second stock is inserted.

6, according to the described polymer shaping method of claim 5, it is characterized in that: this fluid is a gas.