CN215396543U

CN215396543U - Novel extrusion injection mold of silica gel

Info

Publication number: CN215396543U
Application number: CN202120934566.7U
Authority: CN
Inventors: 苏旭平
Original assignee: Zhongshan Yiyong Electronics Co ltd
Current assignee: Zhongshan Yiyong Electronics Co ltd
Priority date: 2021-05-03
Filing date: 2021-05-03
Publication date: 2022-01-04
Anticipated expiration: 2031-05-03

Abstract

The utility model discloses a novel silica gel extrusion injection mold which comprises a first mold, a first hydraulic cylinder, a second mold, a second hydraulic cylinder, a cavity, a first groove and a second groove, wherein the second mold is correspondingly arranged on one side of the first mold, the cavity is formed in the first mold, a piston is slidably mounted in the cavity, an injection molding hole penetrating through the upper surface of the first mold is formed in the upper end of the cavity, the outer walls of the two sides of the second mold are respectively provided with the first groove and the second groove, a stroke plate is arranged in the first groove, a forming block is arranged on the surface of one side of the stroke plate, the second hydraulic cylinder is mounted in the second groove, and the first hydraulic cylinder is mounted on the outer wall of the side, away from the second mold, of the first mold. According to the utility model, after injection molding is finished, the hole between the injection molding hole and the molding groove is sealed through the piston, so that the surface of a molded workpiece is prevented from being raised, and secondary processing and grinding are not needed.

Description

Novel extrusion injection mold of silica gel

Technical Field

The utility model relates to the technical field of injection molds, in particular to a novel silica gel extrusion injection mold.

Background

Injection molding is a revolutionary technology combining plastic injection molding, polymer chemistry, powder metallurgy technology and metal material science, can manufacture metal or nonmetal parts with high precision, high density and complex shapes, and is widely applied in the light and thin fields of consumer electronic products such as portable products, wearable products and intelligent equipment and IT electronic products.

In the use of the existing silica gel extrusion injection mold, after melted silica gel is injected into a gap between a molding groove and a molding block, the injection molding hole and the space surface are still connected with each other, after an injection molding part is cooled and molded, demolding is needed, in the demolding process, the silica gel solidified between the injection molding workpiece and the injection molding hole can be fractured, so that the phenomenon of unevenness of the surface of a workpiece joint is caused, secondary processing is needed to be carried out on the workpiece, the production cost is increased, part of high-precision workpieces need to be machined by a lathe during secondary processing, a lathe tool mark can be left on the surface of the workpiece by a lathe tool, and the attractiveness of the surface of the workpiece can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel silica gel extrusion injection mold to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel extrusion injection mold of silica gel, includes first mould, first pneumatic cylinder, second mould, second pneumatic cylinder, cavity, first recess and second recess, first mould one side is provided with corresponding second mould, the inside cavity of having seted up of first mould, the inside slidable mounting of cavity has the piston, the inside hole of moulding plastics that runs through first mould upper surface of seting up in cavity upper end, the shaping groove has been seted up towards second mould side surface to first mould, first recess and second recess have been seted up respectively to second mould both sides outer wall, the inside stroke board that is provided with of first recess, stroke board side surface is provided with the shaping piece, second recess internally mounted has the second pneumatic cylinder, first mould deviates from second mould one side outer wall and installs first pneumatic cylinder.

Preferably, the four corners of the surface of one side of the first mold opposite to the second mold are respectively provided with a limiting column and a tabling hole, and the limiting columns correspond to the tabling holes.

Preferably, an extrusion pipe is arranged on the upper surface of the first die, and the lower end of the extrusion pipe is communicated with the injection molding hole.

Preferably, the four corners of the outer wall of one side of the second die, which is away from the first die, are provided with travel rods.

Preferably, the inner wall of one end of the cavity, which is far away from the first hydraulic cylinder, is provided with a limiting hole which penetrates through the inner wall of the forming groove, and one end of the piston is embedded with the inner wall of the limiting hole.

Preferably, one end of the first hydraulic cylinder is provided with a first hydraulic rod, one end of the first hydraulic rod is connected with the piston, the outer wall of one end of the first hydraulic cylinder is sleeved with a positioning block, and one end of the positioning block is connected with the inner wall of the cavity.

Preferably, a through hole communicated with the first groove and the second groove is formed between the first groove and the second groove, a second hydraulic rod penetrating through the through hole is arranged at one end of the second hydraulic cylinder, and one end of the second hydraulic rod is connected with the stroke plate.

Preferably, the molding block is embedded with the molding groove.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, by arranging the piston, the space between the injection molding hole and the molding groove can be isolated, the connection between silica gel inside the injection molding hole and a workpiece is avoided in the cooling and shaping process, the phenomenon that the joint of the surface of the workpiece and the injection molding hole is broken to generate unevenness after the workpiece is demoulded is avoided, and after the injection molding is finished, the piston moves in the cavity, the silica gel between the molding groove and the injection molding hole can be isolated, and the surface of the piston and the surface of the molding groove form a plane, so that the surface of the workpiece after the cooling and shaping is smoother, secondary processing is not needed, and the production cost and the production efficiency are effectively saved; in the piston moving process, the silica gel in the forming groove can be added for extrusion, so that the cooling and forming workpiece is more compact, and the silica gel is more uniformly distributed.

Drawings

FIG. 1 is a schematic main sectional view of a first mold and a second mold according to the present invention;

FIG. 2 is an enlarged view of the structure A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure B of FIG. 1 according to the present invention;

FIG. 4 is a side view of the first mold of the present invention;

FIG. 5 is a side view of a second mold according to the present invention.

In the figure: 1. a first mold; 2. injection molding holes; 3. a first hydraulic cylinder; 4. forming a groove; 5. a limiting column; 6. a second mold; 7. a trip lever; 8. a stroke plate; 9. a second hydraulic cylinder; 10. a fitting hole; 11. extruding a pipe; 12. positioning blocks; 13. a first hydraulic lever; 14. a piston; 15. a cavity; 16. a limiting hole; 17. forming a block; 18. a first groove; 19. a second hydraulic rod; 20. a through hole; 21. a second groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, an embodiment of the present invention includes: the utility model provides a novel extrusion injection mold of silica gel, includes first mould 1, first pneumatic cylinder 3, second mould 6, second pneumatic cylinder 9, cavity 15, first recess 18 and

second recess

21, 1 one side of first mould is provided with corresponding second mould 6, first mould 1 is provided with spacing post 5 and gomphosis hole 10 respectively with the relative side surface four corners department of second mould 6, spacing post 5 all is corresponding with gomphosis hole 10, second mould 6 deviates from 1 one side outer wall four corners department of first mould and is provided with stroke pole 7.

Cavity 15 has been seted up to first mould 1 is inside, the inside slidable mounting of cavity 15 has piston 14, cavity 15 deviates from 3 one end inner walls of first pneumatic cylinder and sets up the spacing hole 16 that runs through the shaping groove 4 inner wall, piston 14 one end and spacing hole 16 inner wall looks gomphosis, cavity 15 upper end is inside to be seted up the hole 2 of moulding plastics that runs through 1 upper surface of first mould, 1 upper surface of first mould is provided with extruded tube 11, extruded tube 11 lower extreme is linked together with the hole 2 of moulding plastics, silica gel after melting pours into through extruded tube 11 in the hole 2 of moulding plastics, first mould 1 and second mould 6 laminating back, space constitution work piece's shape between shaping groove 4 and the shaping piece 17, silica gel in the hole 2 of moulding plastics pours into between shaping groove 4 and the shaping piece 17 through cavity 15 and spacing hole 16.

The outer wall of one side, away from the second mold 6, of the first mold 1 is provided with a first hydraulic cylinder 3, one end of the first hydraulic cylinder 3 is provided with a first hydraulic rod 13, one end of the first hydraulic rod 13 is connected with a piston 14, the outer wall of one end of the first hydraulic cylinder 3 is sleeved with a positioning block 12, one end of the positioning block 12 is connected with the inner wall of a cavity 15, the surface of one side, facing the second mold 6, of the first mold 1 is provided with a forming groove 4, after injection molding is completed, the first hydraulic cylinder 3 drives the piston 14 to move in the cavity 15, the piston 14 extrudes silica gel in the cavity 15 to move into the forming groove 4, so that the silica gel is distributed in the forming groove 4 more comprehensively and uniformly, after the piston 14 is completely embedded with a limiting hole 16, the space between the injection molding hole 2 and the forming groove 4 can be isolated, connection between the silica gel in the injection hole 2 and a workpiece is avoided in a cooling and the workpiece is avoided after the workpiece is demolded, the phenomenon of unevenness is generated by the fracture of the joint of the surface of the workpiece and the injection molding hole 2, the surface of the piston 14 and the surface of the forming groove 4 form a plane, the surface of the cooled and shaped workpiece is more flat, secondary processing is not needed, and the production cost and the production efficiency are effectively saved.

First recess 18 and second recess 21 have been seted up respectively to second mould 6 both sides outer wall, the inside stroke board 8 that is provided with of first recess 18, stroke board 8 side surface is provided with shaping block 17, shaping block 17 and shaping groove 4 looks gomphosis, second recess 21 internally mounted has second pneumatic cylinder 9, set up the through-hole 20 that is linked together between first recess 18 and the second recess 21, second pneumatic cylinder 9 one end is provided with second pneumatic cylinder 19 that runs through-hole 20, second pneumatic cylinder 19 one end is connected with stroke board 8, after the cooling design, stroke pole 7 drives second mould 6 and first mould 1 separation, second pneumatic cylinder 9 drives stroke board 8 and breaks away from first recess 18 fast, utilize stroke board 8 to pop out the inertia of first recess 18 fast, break away from the work piece on shaping block 17 surface.

The working principle is as follows: after the melted silica gel is injected into the injection molding hole 2 through the extrusion pipe 11, after the first mold 1 is jointed with the second mold 6, the space between the molding groove 4 and the molding block 17 forms the shape of a workpiece, the silica gel in the injection molding hole 2 is injected between the molding groove 4 and the molding block 17 through the cavity 15 and the limiting hole 16, after the injection molding is finished, the first hydraulic cylinder 3 drives the piston 14 to move in the cavity 15, the piston 14 extrudes the silica gel in the cavity 15 to move towards the molding groove 4, so that the silica gel is distributed more comprehensively and uniformly in the molding groove 4, after the piston 14 is completely embedded with the limiting hole 16, the space between the injection molding hole 2 and the molding groove 4 can be isolated, the connection between the silica gel in the injection molding hole 2 and the workpiece in the cooling and shaping process is avoided, the phenomenon that the joint of the surface of the workpiece and the injection molding hole 2 is broken and uneven after the demolding of the workpiece is avoided, and the surface of the piston 14 and the surface of the molding groove 4 form a plane, the surface of the cooled and shaped workpiece is smoother, secondary processing is not needed, and the production cost and the production efficiency are effectively saved;

after cooling and shaping, the stroke rod 7 drives the second die 6 to separate from the first die 1, the second hydraulic cylinder 9 drives the stroke plate 8 to rapidly separate from the first groove 18, and the inertia of the stroke plate 8 which rapidly pops out the first groove 18 is utilized to separate the workpiece on the surface of the forming block 17.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a novel extrusion injection mold of silica gel, includes first mould (1), first pneumatic cylinder (3), second mould (6), second pneumatic cylinder (9), cavity (15), first recess (18) and second recess (21), its characterized in that: a second mould (6) corresponding to the first mould (1) is arranged on one side of the first mould (1), a cavity (15) is arranged in the first mould (1), a piston (14) is slidably arranged in the cavity (15), an injection molding hole (2) penetrating through the upper surface of the first mold (1) is formed in the upper end of the cavity (15), a molding groove (4) is arranged on the surface of one side of the first mold (1) facing the second mold (6), the outer walls of two sides of the second die (6) are respectively provided with a first groove (18) and a second groove (21), a stroke plate (8) is arranged in the first groove (18), a forming block (17) is arranged on the surface of one side of the stroke plate (8), second recess (21) internally mounted has second pneumatic cylinder (9), first mould (1) deviates from second mould (6) one side outer wall and installs first pneumatic cylinder (3).

2. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: the four corners of the surface of one side, opposite to the first die (1) and the second die (6), of the first die are respectively provided with a limiting column (5) and an embedding hole (10), and the limiting columns (5) correspond to the embedding holes (10).

3. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: an extrusion pipe (11) is arranged on the upper surface of the first die (1), and the lower end of the extrusion pipe (11) is communicated with the injection molding hole (2).

4. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: and a stroke rod (7) is arranged at the four corners of the outer wall of one side of the second die (6) departing from the first die (1).

5. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: the inner wall of one end, deviating from the first hydraulic cylinder (3), of the cavity (15) is provided with a limiting hole (16) penetrating through the inner wall of the forming groove (4), and one end of the piston (14) is embedded with the inner wall of the limiting hole (16).

6. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: first hydraulic cylinder (3) one end is provided with first hydraulic stem (13), first hydraulic stem (13) one end is connected with piston (14), locating piece (12) have been cup jointed to first hydraulic cylinder (3) one end outer wall, locating piece (12) one end is connected with cavity (15) inner wall.

7. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: a through hole (20) communicated with each other is formed between the first groove (18) and the second groove (21), a second hydraulic rod (19) penetrating through the through hole (20) is arranged at one end of the second hydraulic cylinder (9), and one end of the second hydraulic rod (19) is connected with the stroke plate (8).

8. The novel extrusion injection mold of silicone rubber as claimed in claim 1, wherein: the molding block (17) is embedded with the molding groove (4).