CN214982816U

CN214982816U - Injection mold for preventing flow marks on surface of product

Info

Publication number: CN214982816U
Application number: CN202121034268.9U
Authority: CN
Inventors: 蒋嵩
Original assignee: Wuxi Aoyu Precision Machinery Co ltd
Current assignee: Wuxi Aoyu Precision Machinery Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-03
Anticipated expiration: 2031-05-14

Abstract

The utility model relates to a prevent that product surface from taking place injection mold of flow mark, it includes: the cooling device comprises a bottom plate, a vertical plate fixed on the top of the bottom plate, a lower template fixed on the top of the vertical plate, a forming cavity arranged on the top of the lower template, an S-shaped runner arranged on the top of the lower template and communicated with the forming cavity, cooling material wells arranged at two ends and at the bottom of the S-shaped runner, a first cooling water channel arranged in the lower template, an upper template arranged on the lower template and used in cooperation with the lower template, a second cooling water channel arranged in the upper template, a top plate fixed on the top of the upper template, and a sprue bush fixed on the top plate and extending to the S-shaped runner through the upper template; the utility model discloses set up the S-shaped runner at the lower bolster top, molten PC material has solved the poor problem of PC material mobility through S-shaped runner inflow die cavity, can not leave the trace on the product surface, has improved the aesthetic measure and the qualification rate of product.

Description

Injection mold for preventing flow marks on surface of product

Technical Field

The utility model belongs to injection mold class technology field, concretely relates to prevent that product surface from taking place injection mold of flow mark.

Background

Injection molding is a method for producing moldings from industrial products, which are usually produced by injection molding of rubber or plastic. The injection molding product is generally used in the industries of mobile phones, portable computers, communication, electric appliances, electronics, toys and the like.

In the prior art, molten rubber is injected into a straight flow channel in a mold through an injection molding machine, then flows into a cavity for molding, and is taken out after being cooled. The fluidity of the molten PC material is not good, and if the molten PC material is injected into a cavity through a direct current channel, flow marks are left on a molded product, so that the attractiveness of the product is seriously affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection mold for preventing product surface from generating flow marks in order to overcome the defects of the prior art.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an injection mold for preventing flow marks on the surface of a product, comprising:

a bottom plate, a vertical plate fixed on the top of the bottom plate, a lower template fixed on the top of the vertical plate, a forming cavity arranged on the top of the lower template, an S-shaped runner arranged on the top of the lower template and communicated with the forming cavity, cold material wells arranged at the two ends and the bottom of the S-shaped runner, and a first cooling water path arranged in the lower template, the upper die plate is arranged on the lower die plate and used in cooperation with the lower die plate, a second cooling water channel is formed in the upper die plate, a top plate is fixed to the top of the upper die plate, a sprue bush is fixed to the top of the upper die plate and extends to the S-shaped runner, a first ejector pin penetrates through the lower die plate and extends to the bottom of the S-shaped runner, a second ejector pin penetrates through the lower die plate and extends to the molding cavity, and a limiting plate is fixed to the upper die plate and penetrates through the lower die plate;

and a main runner communicated with the S-shaped runner is arranged in the sprue bush.

Optimally, the device also comprises a first supporting plate arranged above the bottom plate, a second supporting plate fixed at the top of the first supporting plate, a jacking column fixed on the second supporting plate and abutted against the lower surface of the upper template, a return spring sleeved on the jacking column, a supporting column fixed on the bottom plate and abutted against the lower surface of the lower template, and a fixing column fixed on the bottom plate and extending into the forming cavity.

Optimally, the top of the limiting plate is provided with a clamping part clamped on the upper template, and the bottom of the limiting plate is provided with a wedge-shaped part.

Optimally, the section of the main flow channel is isosceles trapezoid, and the upper bottom of the isosceles trapezoid is smaller than the lower bottom.

Preferably, the second thimble is sleeved on the fixed column.

Preferably, water or oil is introduced into the first cooling water path and the second cooling water path.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses prevent that product surface from taking place the injection mould of flow mark and offer the S-shaped runner at the lower bolster top, molten PC material has solved the poor problem of PC material mobility through the S-shaped runner inflow die cavity, can not leave the mark on the product surface, has improved the aesthetic measure and the qualification rate of product.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a partial structure of the present invention;

FIG. 3 is a schematic structural view of the sprue bush of the present invention;

fig. 4 is a schematic structural view of the upper template of the present invention;

fig. 5 is a schematic structural view of the lower template of the present invention;

fig. 6 is a cross-sectional view of the lower template of the present invention;

fig. 7 is a schematic structural diagram of the limiting plate of the present invention;

FIG. 8 is a cross-sectional view of the limiting plate and the lower template of the present invention;

fig. 9 is a diagram of the position relationship between the first thimble and the second thimble according to the present invention;

description of reference numerals:

1. a base plate; 2. a vertical plate; 3. a lower template; 301. an S-shaped flow channel; 302. a cold charge well; 303. a first cooling water path; 304. a molding cavity; 4. mounting a template; 402. a second cooling water path; 5. a top plate; 6. a fixing ring; 7. a sprue bush; 701. a main flow channel; 8. a guide post; 9. a guide sleeve; 10. a first support plate; 11. a second support plate; 12. jacking the column; 13. a return spring; 14. a support pillar; 15. a first thimble; 16. a second thimble; 17. fixing a column; 18. a limiting plate; 181. a clamping part; 182. a wedge portion.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

As shown in fig. 1, for the utility model discloses a structural schematic diagram, it is used with the injection molding machine cooperatees usually for the injection moulding of industrial product, it mainly includes bottom plate 1, riser 2, lower bolster 3, cope match-plate pattern 4, roof 5, solid fixed ring 6, sprue bush 7, guide post 8, uide bushing 9, first backup pad 10, second backup pad 11, jacking post 12, reset spring 13, support column 14, first thimble 15, second thimble 16, fixed column 17 and limiting plate 18 etc..

The bottom plate 1 is a rectangular metal plate, and is usually fixed to a machine table of an injection molding machine (the fixation can be realized by a screw fastening mode). The vertical plate 2 has two blocks, and they are fixed on the upper surface of the bottom plate 1 by screw fastening or welding. The lower template 3 is fixed on the top of the two vertical plates 2 (in this embodiment, the lower template 3 is fixed by screwing a long screw through the bottom plate 1 and the vertical plates 2 and on the bottom of the lower template 3). As shown in fig. 5, which is a schematic structural diagram of the lower template 3, the top of the lower template 3 is provided with a molding cavity 304 and an S-shaped runner 301 (the S-shaped runner 301 is connected to the molding cavity 304, and molten plastic flows into the molding cavity 304 through the S-shaped runner 301 for molding, so that the S-shaped runner 301 solves the problem of poor flowability of molten PC, and therefore no flow mark is left on the surface of a product, and the aesthetic property of the product is improved). Cold charge wells 302 are provided at both ends and at the bottom of the S-shaped flow channel 301 (cold charge wells 302 are used to store cold charge heads generated during the injection interval). The first cooling water path 303 is arranged inside the lower template 3 (the first cooling water path 303 has two functions, namely, before injection molding, hot water/hot oil is introduced into the first cooling water path 303 to increase the initial temperature of the lower template 3 and prevent molten plastic from flowing into the lower template 3 and being cooled in advance due to temperature difference, and after injection molding is completed, the first cooling water path 303 can play a role in accelerating product cooling and improving injection molding efficiency).

The upper mold plate 4 is disposed on the lower mold plate 3 and used in cooperation therewith, as shown in fig. 4, which is a schematic structural view of the upper mold plate 4, the second cooling water path 402 is disposed in the upper mold plate 4, and the second cooling water path 402 and the first cooling water path 303 have the same function, which is not described herein again. Four guide posts 8 are fixed on the lower template 3; four guide sleeves 9 are embedded in the upper template 4 and are matched with the guide posts 8 for use (the number of the guide sleeves 9 is the same as that of the guide posts 8). The top plate 5 is fixed on the top of the upper template 4 in a screw fastening mode, and the fixing ring 6 is fixed on the upper surface of the top plate 5. One end of the sprue bush 7 is fixed on the upper surface of the upper template 4, and the other end of the sprue bush passes through the upper template 4 and extends to the S-shaped runner 301, as shown in fig. 3, which is a sectional view of the sprue bush 7, and a main runner 701 communicated with the S-shaped runner 301 is arranged in the sprue bush 7 (molten plastic flows into the S-shaped runner 301 through the main runner 701 and then flows into the molding cavity 304 for molding; in this embodiment, the cross section of the main runner 701 is isosceles trapezoid, and the upper bottom of the isosceles trapezoid is smaller than the lower bottom).

The first support plate 10 is disposed above the base plate 1, and the second support plate 11 is fixed to the first support plate 10 by means of screw fastening. Four jacking columns 12 are provided, one end of each of the four jacking columns is fixed on the second support plate 11, the other end of each of the four jacking columns penetrates through the lower template 3 and extends to the bottom of the upper template 4, and four return springs 13 are arranged and sleeved on the jacking columns 12 (the return springs 13 are used for returning the second support plate 11; in the embodiment, the return springs 13 are arranged between the second support plate 11 and the lower template 3, and the number of the return springs 13 is the same as that of the jacking columns 12). Four support columns 14 are provided, one end of each support column is fixed on the bottom plate 1, and the other end of each support column penetrates through the first support plate 10 and the second support plate 11 to abut against the lower template 3.

One end of the first thimble 15 is fixed on the second supporting plate 11, and the other end thereof penetrates through the lower template 3 and extends to the bottom of the S-shaped runner 301. One end of the fixing post 17 is fixed on the bottom plate 1, the other end of the fixing post penetrates through the first supporting plate 10, the second supporting plate 11 and the lower mold plate 3 and extends into the molding cavity 304, one end of the second thimble 16 is fixed on the second supporting plate 11, and the other end of the second thimble 16 penetrates through the lower mold plate 3 and extends into the molding cavity 304 (in this embodiment, the second thimble 16 is sleeved on the fixing post 17, and the number of the second thimble 16 and the fixing post 17 is the same).

The two limit plates 18 are fixed on the upper template 4 at one side, and penetrate through the lower template 3 at the other side, as shown in fig. 7, which is a schematic structural diagram of the limit plates 18. The top of the limiting plate 18 is provided with a clamping part 181 clamped on the upper die plate 4, and the bottom of the limiting plate 18 is provided with a wedge-shaped part 182 (the wedge-shaped part 182 has inward draft angle, so that the demoulding is convenient).

The utility model discloses prevent that product surface from taking place the operating principle of injection mold of flow mark: the outside lift cylinder drives first backup pad 10 and the lift of second backup pad 11 (the lift cylinder body is fixed at bottom plate 1 lower surface, and the telescopic link passes bottom plate 1 and links to each other with first backup pad 10), and lifting column 12 is with cope match-plate pattern 4 jack-up, and first thimble 15 and second thimble 16 rise with second backup pad 11 is synchronous, and the product after will forming is ejecting, takes out the product after, under reset spring 13's effect, second backup pad 11 resets.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An injection mold for preventing flow marks on the surface of a product, which is characterized by comprising:

the cooling device comprises a bottom plate (1), a vertical plate (2) fixed to the top of the bottom plate (1), a lower template (3) fixed to the top of the vertical plate (2), a forming cavity (304) formed in the top of the lower template (3), an S-shaped runner (301) arranged on the top of the lower template (3) and communicated with the forming cavity (304), a cooling well (302) arranged at two ends and at the bottom of the S-shaped runner (301), a first cooling water channel (303) arranged inside the lower template (3), an upper template (4) arranged on the lower template (3) and matched with the lower template, a second cooling water channel (402) arranged in the upper template (4), a top plate (5) fixed to the top of the upper template (4), a sprue bush (7) fixed to the top of the upper template (4) and extending to the S-shaped runner (301), and a first thimble (15) penetrating through the lower template (3) and extending to the bottom of the S-shaped runner (301) The second ejector pin (16) penetrates through the lower template (3) and extends to the forming cavity (304), and the limiting plate (18) is fixed on the upper template (4) and penetrates through the lower template (3);

and a main runner (701) communicated with the S-shaped runner (301) is arranged in the sprue bush (7).

2. An injection mold for preventing flow marks on the surface of a product according to claim 1, wherein: it is still including setting up first backup pad (10) in bottom plate (1) top, fixing second backup pad (11) at first backup pad (10) top, fix on second backup pad (11) and support and establish jacking post (12), the cover of cope match-plate pattern (4) lower surface are established reset spring (13) on jacking post (12), fix on bottom plate (1) and support and establish support post (14) of lower bolster (3) lower surface and fix on bottom plate (1) and extend to fixed column (17) in shaping chamber (304).

3. An injection mold for preventing flow marks on the surface of a product according to claim 1, wherein: the top of the limiting plate (18) is provided with a clamping part (181) clamped on the upper template (4), and the bottom of the limiting plate (18) is provided with a wedge-shaped part (182).

4. An injection mold for preventing flow marks on the surface of a product according to claim 1, wherein: the section of the main flow channel (701) is isosceles trapezoid, and the upper bottom of the isosceles trapezoid is smaller than the lower bottom.

5. An injection mold for preventing flow marks on the surface of a product according to claim 2, wherein: the second thimble (16) is sleeved on the fixed column (17).

6. An injection mold for preventing flow marks on the surface of a product according to claim 1, wherein: water or oil is introduced into the first cooling water path (303) and the second cooling water path (402).