CN211763204U

CN211763204U - Injection mold of activity exhaust needle

Info

Publication number: CN211763204U
Application number: CN202020262767.2U
Authority: CN
Inventors: 章庆华
Original assignee: Isen Precision Industrial Shenzhen Co ltd
Current assignee: Isen Precision Industrial Shenzhen Co ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-10-27
Anticipated expiration: 2030-03-04

Abstract

The utility model provides an injection mold of activity exhaust needle, cope match-plate pattern, first fixed die plate, shaping mold insert, second fixed die plate, square iron, thimble panel, thimble bottom plate and the lower bolster including extremely setting up from top to bottom, shaping mold insert middle part is formed with the shaping chamber, and the middle part in shaping chamber forms a cavity and forms the boss, the middle part that cavity formed the boss be equipped with the exhaust hole of shaping chamber intercommunication, the injection mold of activity exhaust needle is still including locating exhaust needle in the exhaust hole, the one end of exhaust needle with exhaust hole intercommunication, the other end passes the shaping mold insert and with the ascending movable plate spare of the vertical side of shaping mold insert is connected. Above-mentioned injection mold of activity exhaust needle, when movable plates such as cope match-plate pattern, thimble panel, thimble bottom plate removed, can drive the exhaust needle rather than being connected for the exhaust needle just constantly axial motion in the exhaust hole, thereby guaranteed in time clearance and unobstructed of rubbish in the exhaust hole.

Description

Injection mold of activity exhaust needle

Technical Field

The utility model relates to an injection mold technical field, in particular to injection mold of activity exhaust needle.

Background

In the development of injection molds, a hollow structural feature is often encountered in the interior of a plastic product, wherein the plastic is molded in a closed cavity of a front mold core and a rear mold core of the injection mold. The hollow part of the rubber piece is formed in the injection mold by tightly sealing the steel material. During injection molding production, the problem that gas needs to be discharged along with the filling of the rubber material can occur to the hollow inner edge of the rubber part.

In general, in the injection mold, a first-stage exhaust groove is formed in a hollow steel material part of a rubber part at a position where the edge of the rubber part is trapped with air, the groove is shallow (0.005-0.1 mm) according to the overflow value of the rubber material, and a second-stage exhaust groove is formed behind the rubber part and is slightly deeper (0.2-3 mm) than the first-stage exhaust groove. The periphery of the hollow sealing surface of the rear mould core gluing piece is surrounded by the gluing piece, and the gas in the secondary groove is sealed and trapped by the front and rear mould cores, so that the exhaust hole is formed from the inside. The exhaust hole can exhaust the gas in the secondary exhaust groove to the outside of the injection mold. The exhaust holes can be reasonably selected to be arranged in the front mold core, the first fixed mold plate, the rear mold core and the second fixed mold plate according to specific conditions, and almost all injection molds can be selected for use under the two conditions;

however, the exhaust mode through the exhaust holes has problems and disadvantages, namely, in the long-term injection molding production process of the injection mold, dust and rubber chips form garbage blocks through mold washing water and a release agent to gradually block the exhaust holes, and even broken rubber sheets drop into the exhaust holes to directly block the exhaust holes, so that unsmooth exhaust is influenced, and even the exhaust holes are completely airtight, and the injection molding production is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection mold of activity exhaust needle to solve the problem that the exhaust hole blockked up takes place easily for the exhaust mode in current injection mold's exhaust hole.

The utility model provides an injection mold of activity exhaust needle, cope match-plate pattern, first fixed die plate, shaping mold insert, second fixed die plate, square iron, thimble panel, thimble bottom plate and the lower bolster including extremely setting up from top to bottom, shaping mold insert middle part is formed with the shaping chamber, and the middle part in shaping chamber forms a cavity and forms the boss, the middle part that cavity formed the boss be equipped with the exhaust hole of shaping chamber intercommunication, the injection mold of activity exhaust needle is still including locating exhaust needle in the exhaust hole, the one end of exhaust needle with exhaust hole intercommunication, the other end passes the shaping mold insert and with the ascending movable plate spare of the vertical side of shaping mold insert is connected.

Above-mentioned injection mold of activity exhaust needle, when movable plates such as cope match-plate pattern, thimble panel, thimble bottom plate removed, can drive the exhaust needle rather than being connected for the exhaust needle just constantly axial motion in the exhaust hole, thereby guaranteed in time clearance and unobstructed of rubbish in the exhaust hole.

Further, the molding insert comprises a front mold core and a rear mold core.

Furthermore, the exhaust needle penetrates through the front mold core until being connected with the upper mold plate.

Further, the exhaust needle pass through an elastic component with the cope match-plate pattern is connected, the upper end of first fixed die plate is equipped with an assembly groove, the exhaust needle pass the bottom of assembly groove with the exhaust hole intercommunication, the upper end of exhaust needle is equipped with spacing protruding edge, spacing protruding edge support lean on in the tank bottom of assembly groove.

Furthermore, the exhaust needle penetrates through the rear mold core until being fixedly connected with the ejector pin panel and the ejector pin base plate simultaneously.

Further, the elastic member includes any one of elastic glue, a spring plate, or a spring.

Further, the shape of the cross section of the exhaust needle is a polygon.

Drawings

Fig. 1 is a schematic structural view of an injection mold for a movable exhaust needle according to a first embodiment of the present invention in a first state;

FIG. 2 is a schematic structural view of an injection mold of the movable vent needle of FIG. 1 in a second state;

fig. 3 is a schematic structural view of an injection mold for a movable exhaust needle according to a second embodiment of the present invention in a first state;

FIG. 4 is a structural diagram of the injection mold of the movable air bleeding needle in FIG. 3 in a second state;

fig. 5 is a schematic perspective view of the rear mold core in fig. 3.

Description of the main element symbols:

the following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a first embodiment of the present invention provides an injection mold for a movable exhaust pin, which includes an upper mold plate 10, a first fixed mold plate 20, a molding insert 30, a second fixed mold plate 40, a square iron 50, an ejector pin panel 60, an ejector pin bottom plate 70, and a lower mold plate 80, the molding insert 30 is formed with a molding cavity (not shown) at a central portion thereof, and a hollow forming boss 321 is formed at a central portion of the molding cavity, so as to form a hollow structure of the rubber part 100, the middle part of the hollow forming boss 321 is provided with an exhaust hole 322 communicated with the forming cavity, the injection mold of the movable exhaust needle further comprises an exhaust needle 90 arranged in the exhaust hole 322, one end of the exhaust needle 90 is communicated with the exhaust hole 322, and the other end of the exhaust needle passes through the forming insert 30 and is connected with a movable plate in the vertical direction of the forming insert 30. The movable plates are parts that need to be moved in the injection molding process, such as the upper plate 10, the ejector pin panel 60, the ejector pin base plate 70, and the like.

When the movable plates such as the upper template 10, the ejector pin panel 60 and the ejector pin bottom plate 70 move, the injection mold of the movable exhaust pin can drive the exhaust pin 90 connected with the movable exhaust pin, so that the exhaust pin 90 continuously axially moves in the exhaust hole 322, thereby ensuring timely cleaning and smoothness of garbage in the exhaust hole 322 and preventing the exhaust hole 322 from being blocked.

Specifically, in the present embodiment, the molding insert 30 includes a front mold core 31 and a rear mold core 32. The exhaust needle 90 penetrates through the front mold core 31 until being connected with the upper mold plate 10, so that the exhaust needle 90 is driven to continuously axially move in the exhaust hole 322 when the upper mold plate 10 moves, the garbage in the exhaust hole 322 is continuously removed, and the exhaust hole 322 is prevented from being blocked.

Specifically, in this embodiment, the exhaust needle 90 is connected to the upper mold plate 10 through an elastic member 92, so that the exhaust needle 90 is elastically connected to the upper mold plate 10 and automatically moves up and down, specifically, when the exhaust needle 90 abuts against the rear mold core 32 at the lower end, the elastic member 92 contracts, when the upper mold plate 10 ascends, the elastic member 92 ejects the exhaust needle 90 out of the exhaust hole 322, and removes the garbage in the exhaust hole 322, specifically, in this embodiment, the upper end of the first fixing mold plate 20 is provided with an assembling groove 21, the exhaust needle 90 passes through the bottom end of the assembling groove 21 and is communicated with the exhaust hole 322, the upper end of the exhaust needle 90 is provided with a limiting convex edge 91, the limiting convex edge 91 abuts against the groove bottom of the assembling groove 21, so as to prevent the exhaust needle 90 from falling out of the exhaust hole 322, and simultaneously prevent the elastic member 92 from being excessively extended to cause an excessively large deformation, the elasticity is lost.

Specifically, in this embodiment, the elastic member 92 may be any one of an elastic rubber, an elastic sheet, or a spring.

Specifically, in the present embodiment, the cross section of the exhaust needle 90 is a non-circular needle such as a polygon to prevent the exhaust needle 90 from blocking the exhaust hole 322 due to the adhesion of the exhaust needle and the exhaust hole 322. When the elastic member 92 is a spring, the outer diameter of the spring is smaller than the section of the rear end of the vent needle, and the vent needle 90 can be pressed and released by using the opposite half mold, so that the structure is simple and practical.

Referring to fig. 3 to 5, a difference between the second embodiment and the first embodiment of the injection mold of the movable exhaust needle of the present invention is that in the second embodiment, the exhaust needle 90 penetrates through the rear mold core 32 until being fixedly connected to the thimble panel 60 and the thimble bottom plate 70, and the exhaust needle 90 is driven to move in the exhaust hole 322 by the up-and-down movement of the thimble panel 60 and the thimble bottom plate 70, wherein the lower end of the lower mold plate 80 is provided with a top rod hole 81, and during the injection molding process, the thimble panel 60 and the thimble bottom plate 70 are ejected by the top rod 82, so as to achieve the mold opening.

Specifically, in this embodiment, one side of the hollow forming boss 321 is longitudinally provided with a second air discharge groove 323, the edge of the hollow forming boss 321 is provided with a plurality of first air discharge grooves 324 communicating the forming cavity with the second air discharge grooves 323, and the second air discharge grooves 323 are communicated with the air discharge holes 322 so as to discharge the air in the forming cavity through the first air discharge grooves 324, the second air discharge grooves 323 and the air discharge holes 322 in sequence.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The injection mold is characterized by further comprising an exhaust needle arranged in the exhaust hole, one end of the exhaust needle is communicated with the exhaust hole, and the other end of the exhaust needle penetrates through the molding insert and is connected with a movable plate in the vertical direction of the molding insert.

2. The injection mold for a movable venting needle as defined in claim 1, wherein the molding insert comprises a front mold core and a rear mold core.

3. The injection mold of claim 2, wherein the vent needle passes through the front mold core until it is connected to the top mold plate.

4. The injection mold of claim 3, wherein the exhaust needle is connected to the upper mold plate via an elastic member, the upper end of the first fixing mold plate is provided with an assembling groove, the exhaust needle passes through the bottom end of the assembling groove to communicate with the exhaust hole, the upper end of the exhaust needle is provided with a limiting convex edge, and the limiting convex edge abuts against the bottom of the assembling groove.

5. The injection mold of claim 2, wherein the exhaust pin penetrates through the rear mold core until being fixedly connected to the ejector pin panel and the ejector pin base plate.

6. The injection mold of claim 4, wherein the elastic member comprises any one of an elastic rubber, a spring plate or a spring.

7. The injection mold for an active vent needle of claim 1, wherein the cross-section of the vent needle is polygonal in shape.