CN218139679U

CN218139679U - Demoulding ejection mechanism for injection mould

Info

Publication number: CN218139679U
Application number: CN202221739899.5U
Authority: CN
Inventors: 聂甲治; 刘泉; 彭杰光; 陈天森
Original assignee: Foshan Beiqi Mould Technology Co ltd
Current assignee: Foshan Beiqi Mould Technology Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-12-27
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses a drawing of patterns ejection mechanism for injection mold, ejecting module is used for ejecting the product from the lower mould, install the base at main part module inner chamber including the symmetry, the one end activity sets up the jack-up subassembly that stretches out the base at the inner cavity of the base other end, install the block rubber on jack-up subassembly top, connect the second spring of jack-up subassembly bottom and inner wall of the base and install the subassembly of supplying gas on inner wall of the base, the base is used for installing the jack-up subassembly, it removes to drive the jack-up subassembly simultaneously, the jack-up subassembly includes that the one end activity sets up the ejector pin that stretches out the base at the inner cavity of the base other end, be the arc piece that the annular array installed on the ejector pin lateral surface and cup joint and fix the annular piece at the ejector pin top, the annular piece is used for ejecting with the product, it has the arc wall to be annular array to open at the inner chamber of base, this drawing of patterns ejection mechanism for injection mold, avoid damaging the product and avoid pressure differential influence ejecting advantage when having ejecting.

Description

Demoulding ejection mechanism for injection mould

Technical Field

The utility model relates to an injection mold technical field specifically is an injection mold is with drawing of patterns ejection mechanism.

Background

Injection molding, also known as injection molding, is a method of molding by injection and molding. The injection molding method has the advantages of high production speed, high efficiency, automation of operation, various designs and colors, various shapes from simple to complex, small sizes, accurate product size, easy replacement of products and capability of forming workpieces with complex shapes, the injection mold is used for shaping molten plastic into a mold with a specific size and a specific shape in the injection molding process, and a top-out mechanism is required when an injection molding module is used for demolding.

The existing demoulding and ejecting mechanism mainly has the following defects when in use: the ejector pin is when ejecting the product, and the impact force is great, causes easily that to produce the bottom and produces the gravure, influences the outward appearance of product, simultaneously when carrying out the drawing of patterns, because the product closely laminates with the mould inner wall, leads to the product ejecting and easy and mould inner wall between form the vacuum cavity, causes ejection mechanism to be difficult to ejecting the product under the effect of outside atmospheric pressure, influences the efficiency of moulding plastics.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.

Therefore, the utility model discloses the technical scheme who adopts does: a demolding ejection mechanism for an injection mold comprises: the ejection module comprises a base, a jacking assembly, a rubber block, a second spring and an air supply assembly, wherein the base is symmetrically arranged in an inner cavity of the main body module, the jacking assembly is movably arranged at the other end of the inner cavity of the base and extends out of the base, the rubber block is arranged at the top end of the jacking assembly, the second spring is used for connecting the bottom end of the jacking assembly with the inner wall of the base, and the air supply assembly is arranged on the inner wall of the base.

Preferably, the main body module comprises a lower die and a driving assembly arranged in an inner cavity of the lower die.

Preferably, the driving assembly comprises a bottom plate movably arranged in the inner cavity of the lower die, a first spring connecting the top end of the bottom plate with the inner wall of the lower die, and a cylinder fixed at the bottom end of the bottom plate and extending out of the lower die.

Preferably, the jacking assembly comprises a jacking rod, arc-shaped blocks and a ring-shaped member, wherein one end of the jacking rod is movably arranged in the inner cavity of the base, the other end of the jacking rod extends out of the base, the arc-shaped blocks are arranged on the outer side surface of the jacking rod in an annular array manner, and the ring-shaped member is sleeved and fixed at the top of the jacking rod.

Preferably, the inner cavity of the base is provided with arc-shaped grooves in an annular array, the arc-shaped blocks are embedded in the arc-shaped grooves to move, the inner wall of the rubber block is provided with annular grooves, and the annular pieces are embedded in the annular grooves.

Preferably, the top ends of the ejector rod and the rubber block are provided with through holes with circular cross sections, and the outer side surface of the rubber block is provided with air outlet holes connected with the through holes in an annular array.

Preferably, the air supply assembly comprises a metal pipe fixed on the inner wall of the base and extending into the through hole of the ejector rod and a piston sleeved and fixed at the top of the metal pipe, and the bottom end of the metal pipe extends out of the base and penetrates out of the bottom plate.

By adopting the technical scheme, the utility model discloses the beneficial effect who gains does:

1. the utility model discloses in, through setting up the base, and the ejector pin that stretches out the base is set up in the inner chamber activity of base, the ejector pin removes in the base through the gomphosis of arc piece with the arc wall, set up the second spring simultaneously between ejector pin and base, ejecting module is when by the jack-up, the ejector pin is when contacting the product low side, inwards remove under the effect of impact force, convert the impact force and absorb for the second spring and subduct, the too big product appearance damage that causes of impact force when having avoided the ejector pin jack-up, be provided with the rubber block on the top of ejector pin in addition, a contact area for enlarging ejector pin and product, further impact force to the ejector pin jack-up cushions and disperses, the product can be slowly ejecting at the uniform velocity when having guaranteed the drawing of patterns, the effectual qualification of guaranteeing the product.

2. The utility model discloses in, set up through the inner chamber at ejector pin and block rubber and pass through, and at the base in the wall mounting stretch into the subassembly of supplying gas in the through-hole, when the product produced the cavity with the lower mould inner wall when the drawing of patterns, because the inside air pressure of cavity is less, external air gets into in the through-hole along the tubular metal resonator this moment, and enter into the cavity along the venthole from the through-hole, make the atmospheric pressure of cavity keep balance with external atmospheric pressure, thereby made things convenient for ejecting with the product, the drawing of patterns difficulty of having avoided causing because of the atmospheric pressure difference, the production efficiency of moulding plastics has been increased.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

fig. 2 is a schematic structural view of the ejection module of the present invention;

fig. 3 is a schematic cross-sectional view of the ejection module of the present invention;

fig. 4 is an exploded schematic view of the structure of the ejection module of the present invention.

Reference numerals:

100. a main body module; 110. a lower die; 120. a drive assembly; 121. a base plate; 122. a first spring; 123. a cylinder;

200. ejecting the module; 210. a base; 211. an arc-shaped slot; 220. jacking the assembly; 221. a top rod; 2211. a through hole; 222. an arc-shaped block; 223. an annular member; 230. a rubber block; 231. an air outlet; 240. a second spring; 250. a gas supply assembly; 251. a metal tube; 252. a piston.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

Some embodiments of the present invention will be described below with reference to the accompanying drawings, and referring to fig. 1 to 4, a mold release and ejection mechanism for an injection mold includes: the main body module 100 and the ejection module 200, the main body module 100 includes a lower die 110 and a driving component 120 installed in an inner cavity of the lower die 110, the lower die 110 is used for matching with an upper die to form a cavity for injection molding, the driving component 120 is used for driving the ejection module 200 to eject, the driving component 120 includes a bottom plate 121 movably arranged in the inner cavity of the lower die 110, a first spring 122 connected between the top end of the bottom plate 121 and the inner wall of the lower die 110, and a cylinder 123 fixed at the bottom end of the bottom plate 121 and extending out of the lower die 110, the bottom plate 121 is used for driving the ejection module 200 to move upwards, the synchronism of the ejection modules 200 during ejection operation is maintained, the first spring 122 is used for resetting the bottom plate 121 after the ejection products of the ejection modules 200, so as to drive the ejection modules 200 to reset, and the cylinder 123 facilitates workers to drive the bottom plate 121 to move.

The ejection module 200 is used for ejecting a product from the lower die 110, and includes a base 210 symmetrically installed in an inner cavity of the main body module 100, a jacking assembly 220 with one end movably disposed at the other end of the inner cavity of the base 210 and extending out of the base 210, a rubber block 230 installed at the top end of the jacking assembly 220, a second spring 240 connecting the bottom end of the jacking assembly 220 and the inner wall of the base 210, and an air supply assembly 250 installed on the inner wall of the base 210, wherein the base 210 is used for installing the jacking assembly 220 and driving the jacking assembly 220 to move, the jacking assembly 220 includes a top rod 221 with one end movably disposed at the other end of the inner cavity of the base 210 and extending out of the base 210, an arc block 222 installed on the outer side surface of the top rod 221 in an annular array, and a ring member 223 sleeved on the top of the top rod 221, the top rod 221 is used for ejecting the product, an arc groove 211 is opened in the inner cavity of the base 210 in an annular array, the arc block 222 is embedded in the arc groove 211, the top rod 221 is kept stable when moving, the top rod 221 is prevented from moving in the ejection process, the ring member 223 is used for installing the rubber block 230, the inner wall of the rubber block 230 is provided with an annular groove, the ring member 223 is embedded in the annular groove, the rubber block 230 is convenient to install and disassemble, in addition, the top ends of the top rod 221 and the rubber block 230 are provided with through holes 2211 with round cross sections for feeding in external air, meanwhile, the outer side surface of the rubber block 230 is provided with air outlet holes connected with the through holes 2211 in an annular array manner, the external air enters the inner cavity of the lower die 110 from the through holes 2211 through the air outlet holes 231, the air supply assembly 250 comprises a metal pipe 251 fixed on the inner wall of the base 210 and extending into the through hole 2211 of the top rod 221 and a piston 252 fixedly sleeved on the top of the metal pipe 251, the metal pipe 251 is fixed on the inner wall of the base 210, one end of the metal pipe 251 extends into the through hole 2211 of the inner cavity of the top rod 221, the other end of the air-tight tube extends out of the base 210 and penetrates through the bottom plate 121, so as to introduce external air into the through hole 2211, the air-tight tube is movably fixed on the top of the metal tube 251, the outer side of the air-tight tube is tightly attached to the inner wall of the through hole 2211 of the top rod 221, so as to prevent the air from flowing backwards in the through hole 2211, so that the air can enter a cavity between the product and the lower die 110 along the through hole 2211 and the air outlet 231, balance the air pressure in the cavity with the external air pressure, and facilitate the ejection of the product by the ejection assembly 220.

The utility model discloses a theory of operation and use flow: when demoulding is needed, the cylinder 123 is moved upwards to drive the bottom plate 121 to move upwards, the bottom plate 121 moves to drive the ejection module 200 to move upwards, at the moment, the rubber block 230 is in contact with the bottom end of a product, impact force is primarily buffered and dispersed, meanwhile, the ejector rod 221 moves downwards to transmit the impact force to the second spring 240 and be absorbed by the second spring 240, the damage to the surface of the product due to overlarge impact force is avoided, in addition, when the product is ejected, when the product and the inner wall of the lower die 110 form a cavity, the air pressure inside the cavity is small at the moment, external air enters the through hole 2211 along the metal pipe 251 and enters the cavity from the through hole 2211 along the air outlet hole 231, the air pressure of the cavity is kept balanced with the external air pressure, so that the product is conveniently ejected, and demoulding difficulty caused by air pressure difference is avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A demolding ejection mechanism for an injection mold comprises: the ejection module (200) comprises a base (210) symmetrically arranged in an inner cavity of the main body module (100), a jacking assembly (220) with one end movably arranged at the other end of the inner cavity of the base (210) and extending out of the base (210), a rubber block (230) arranged at the top end of the jacking assembly (220), a second spring (240) connecting the bottom end of the jacking assembly (220) with the inner wall of the base (210) and an air supply assembly (250) arranged on the inner wall of the base (210).

2. The mold release and ejection mechanism of claim 1, wherein the body module (100) comprises a lower mold (110) and a driving assembly (120) mounted in an inner cavity of the lower mold (110).

3. The mold release and ejection mechanism of claim 2, wherein the driving assembly (120) comprises a bottom plate (121) movably disposed in the inner cavity of the lower mold (110), a first spring (122) connecting the top end of the bottom plate (121) and the inner wall of the lower mold (110), and a cylinder (123) fixed at the bottom end of the bottom plate (121) and extending out of the lower mold (110).

4. The demolding ejection mechanism for the injection mold as claimed in claim 1, wherein the ejection assembly (220) comprises a top rod (221) with one end movably arranged in the inner cavity of the base (210) and the other end extending out of the base (210), arc-shaped blocks (222) arranged on the outer side surface of the top rod (221) in an annular array, and a ring-shaped member (223) sleeved and fixed on the top of the top rod (221).

5. The demolding ejection mechanism for the injection mold as claimed in claim 4, wherein the inner cavity of the base (210) is provided with arc-shaped grooves (211) in an annular array, the arc-shaped blocks (222) are embedded in the arc-shaped grooves (211) to move, the inner wall of the rubber block (230) is provided with an annular groove, and the annular member (223) is embedded in the annular groove.

6. The demolding and ejection mechanism for the injection mold as claimed in claim 4, wherein the top ends of the ejector rod (221) and the rubber block (230) are provided with through holes (2211) with circular cross sections, and the outer side surface of the rubber block (230) is provided with air outlet holes (231) connected with the through holes (2211) in an annular array.

7. The mold release and ejection mechanism of claim 1, wherein the air supply assembly (250) comprises a metal tube (251) fixed on the inner wall of the base (210) and extending into the through hole (2211) of the top rod (221), and a piston (252) sleeved and fixed on the top of the metal tube (251), and the bottom end of the metal tube (251) extends out of the base (210) and out of the bottom plate (121).