CN112549453B

CN112549453B - Device for separating and ejecting injection molding product from sprue

Info

Publication number: CN112549453B
Application number: CN202011378528.4A
Authority: CN
Inventors: 马胜; 饶攀; 孙宽
Original assignee: Linhai Weixing New Building Materials Co Ltd
Current assignee: Linhai Weixing New Building Materials Co Ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2022-12-13
Anticipated expiration: 2040-12-01
Also published as: CN112549453A

Abstract

The invention discloses a device for separating and ejecting an injection product from a sprue, which is assembled on a mold for use and belongs to the technical field of separation devices of injection products, wherein the device is arranged in bilateral symmetry and mainly comprises an ejector pin, a flow channel and a core with a submarine core sprue; the runner is arranged between an upper cavity and a lower cavity of the die and is provided with a feed inlet and a plurality of discharge outlets, and the ejector pin penetrates through the movable die frame and the lower cavity to be vertically connected with the runner; the submerged core sprue is of an oblique cone-shaped three-dimensional structure and is arranged in the core, one end with a larger opening is connected with a discharge port of the flow channel, a mold cavity is formed between the core and the upper mold cavity and between the core and the lower mold cavity, and the tip of the submerged core sprue penetrates through the side wall of the core and is connected with the mold cavity; the core is moved out so as to separate the sprue of the injection molded submerged core from the product, and the ejector pin realizes ejection of the ejector pin on the injection molded runner, the sprue of the submerged core and the product; the movable mould frame is connected with the lower compound plate through mould feet. The product produced by the invention has no trace and high production efficiency.

Description

Device for separating and ejecting injection molding product from pouring gate

Technical Field

The invention belongs to the technical field of separation devices of injection products, and particularly relates to a device for separating and ejecting an injection product from a sprue.

Background

An injection mold is an indispensable tool for injection molding, and in order to obtain a plastic product, it is necessary to separate the product from a gate. Through manual operation, need a large amount of manpower and materials, manufacturing cost is high, and the manual work still exists the runner in addition and cuts the plastic products scheduling problem of being uneven or even mistake, leads to product quality to reduce. The submarine gate glue feeding mode also affects the appearance of the product due to the outer surface of the potential product of the common gate. The investment cost and the stability of the hot runner production part can be increased by adding the mechanical arm and the hot runner equipment. The product demoulding mode usually comprises a thimble ejecting product, a stripper plate pushing product and the like, and the thimble ejecting product usually has thimble marks on the appearance, so that the product is not beautiful, the stripper plate stripping product has a complex structure and the like.

Disclosure of Invention

In order to solve the above problems, the present invention provides an apparatus for separating and ejecting an injection molded product from a gate.

The device for separating and ejecting the injection product from the sprue is assembled on a mold for use, and is characterized in that the device is arranged in a bilateral symmetry manner and mainly comprises an ejector pin, a flow channel and a core with a submerged core sprue;

the runner is arranged between an upper cavity and a lower cavity of the die and is provided with a feed inlet and a plurality of discharge outlets, the feed inlet is connected with the sprue bush, the upper cavity is connected with the fixed die frame, the lower cavity is connected with the movable die frame, and the ejector pin penetrates through the movable die frame and the lower cavity to be vertically connected with the runner;

the submerged core sprue is of an oblique cone type three-dimensional structure and is arranged in the end part of the core, one end with a larger opening is connected with a discharge port of the flow channel, core fixing plates are respectively arranged between the core and the fixed die frame and between the core and the movable die frame, a die cavity is formed between the core and the upper die cavity and between the core and the lower die cavity, and the tip end of the submerged core sprue penetrates through the side wall of the core and is connected with the die cavity; the material enters a runner through a runner sleeve, enters a submerged core runner of the core from an outlet of the runner, is discharged from the tip of the submerged core runner and enters a mold cavity to finish injection molding, and the other end of the core is connected with a sliding seat; an inclined guide post is arranged on the sliding seat, the inclined guide post penetrates through the sliding seat, the front end of the inclined guide post is fixedly connected with the fixed die frame, the rear end of the inclined guide post inclines outwards, and the sliding seat moves out of the core when the inclined guide post is pulled away; the rear end of the ejector pin is connected with an ejector pin fixing plate, the ejector roller penetrates through an ejection hole in the lower compound plate, and the ejector pin fixing plate is used for ejecting an injection molding runner, a submerged core sprue and a product by the ejector pin; the movable mould frame is connected with the lower compound plate through mould feet.

The device for separating and ejecting the injection molding product from the sprue is characterized in that an upper compound plate is arranged on the fixed mold frame.

The device for separating and ejecting the injection product from the sprue is characterized in that the sprue bush passes through an upper compound plate and an upper cavity of a mold and is connected with a circulating feed inlet.

The device for separating and ejecting the injection product from the pouring gate is characterized in that the core fixing plate is fixedly connected with the sliding seat.

The device for separating and ejecting the injection product from the pouring gate is characterized in that the runner is provided with a main runner and a plurality of sub-runners, the sub-runners are provided with discharge ports, and the discharge ports are connected with the pouring gate of the submerged core.

The device for separating and ejecting the injection molding product from the pouring gate is characterized in that the ejector pins are divided into main ejector pins and auxiliary ejector pins, the main ejector pins are contacted with a main runner of a runner, and the auxiliary ejector pins are vertically contacted with a sub-runner of the runner.

The device for separating and ejecting the injection molding product from the pouring gate is characterized in that the upper cavity and the lower cavity are connected in an embedded mode through a plurality of positioning columns, and the positioning columns are divided into an upper part and a lower part and are respectively arranged on the upper cavity and the lower cavity.

The device for separating and ejecting the injection product from the sprue is characterized in that a reset rod is arranged between the ejector pin fixing plate and the movable mold frame, and a spring is arranged between the reset rod and the ejector pin fixing plate and used for resetting the ejector pin.

After the injection molding of the material is finished, carrying out die sinking operation, wherein in the die sinking process, the inclined guide post drives the sliding seat to move outwards so as to drive the core to move outwards, the joint of the tip of the sprue of the injection molded submerged core and the core is broken, and the core is moved out of the die cavity; after the separation operation is completed, the ejector roller penetrates through an ejection hole in the lower compound plate to eject the ejector pin, so that the ejector pin is pushed to eject a product, and after the ejection is completed, the ejector roller is reset through a reset rod to perform the injection molding and separation ejection operation in the next step.

Compared with the prior art, the invention has the beneficial effects that:

1) According to the device, the connecting position of the submarine core pouring gate and the die cavity is a tip, the interface is small and easy to break, and before ejection, a product is separated from the runner and the submarine core pouring gate, so that the pouring gate does not need to be cut, and the surface of the finally obtained product does not have a thimble mark and a glue inlet mark;

2) The device of the invention ejects the injection-molded product, the runner and the submerged core sprue by ejecting the thimble through the top roller on the injection molding machine, and the thimble fixing plate is fixed with the reset rod for quick reset, thereby realizing the automation of separation and ejection of the injection-molded product and the sprue;

3) The device provided by the invention has the advantages that the multiple discharge ports are formed in the flow channel, the multi-die-cavity production and one-time separation ejection can be realized, and the production efficiency is improved.

Drawings

FIG. 1 is a mid-horizontal cross-sectional view of the assembled device;

FIG. 2 is a front view of the rear section after opening the mold;

FIG. 3 is a front view of the front portion after opening the mold;

fig. 4 is an internal perspective view after separation of injection molding of an apparatus for separation and ejection of an injection molded product from a gate.

In the figure: 1-coating a composite plate; 2-fixing a mould frame; 3-a core diving pouring gate; 4-upper cavity; 5-moving a mold frame; 6-upper compound plate; 7-an inclined guide post; 8-ejector pins; 9-mold feet; 10-lower compound plate; 11-a mould cavity; 12-a slide; 13-a top roll; 14-core fixing plate; 15-a flow channel; 16-a core; 17-a positioning column; 18-a sprue bush; 19-a thimble fixing plate; 20-top outlet; 21-reset lever.

Detailed Description

The invention will be further described with reference to specific embodiments and figures, but the scope of protection of the invention is not limited thereto.

As shown in fig. 1, the plane section of a device for separating and ejecting an injection product from a sprue is a plane section of the device, the device is assembled on a mold for use, is bilaterally symmetrical and mainly comprises a submerged core sprue 3, an ejector pin 8, a runner 15 and a core 16, the runner 15 is arranged between an upper cavity 4 and a lower cavity 6 of the mold, a sprue bush 18 penetrates through an upper compound plate 1 and a fixed mold frame 2 to be connected with a feed inlet of the runner 15, the upper cavity 4 is connected with the fixed mold frame 2, the lower cavity 6 is connected with a movable mold frame 5, and a plurality of ejector pins 8 penetrate through the lower cavity 6 and the movable mold frame 5 to be vertically connected with the runner 15; the submerged core sprue 3 is of an oblique cone type three-dimensional structure, is arranged in the end part of the core 16, is fixedly connected with the discharge port of the runner 15 at one end with a larger opening, is matched with the core 16, and is respectively provided with a core fixing plate 14 between the core 16 and the fixed die frame 2 as well as between the core 16 and the movable die frame 5 for fixing the core 16; a mold cavity is formed among the core 16, the upper mold cavity 4 and the lower mold cavity 6 and is used for casting a product, and the tip of the submerged core sprue 3 penetrates through the side wall of the core 16 and is connected with the mold cavity; the other end of the core 16 is connected with the sliding seat 12; an inclined guide post 7 is arranged on the sliding seat 12, the inclined guide post 7 penetrates through the sliding seat, the front end of the inclined guide post 7 is connected with the fixed die frame 2, and the rear end of the inclined guide post is inclined outwards for sliding the sliding seat 12 to move out of the core 16; the rear end of the thimble 8 is connected with a thimble fixing plate 19, and the top roller 13 penetrates through a top hole 20 on the lower compound plate 10 of the mold, so that the thimble 8 can eject the runner 15, the submerged core sprue 3 and a product which are subjected to injection molding; the movable mould frame 5 is fixedly connected with the lower compound plate 10 through mould feet 9.

The material enters the runner 15 through the sprue bush 18, and the material in the runner 15 is injected into the mold cavity through the submerged core sprue 3 connected with the runner 15 to manufacture a product.

As shown in fig. 2, which is a schematic view of the inside of the rear part after the mold opening, after the injection is completed, the operation of opening the mold is required: the upper compound plate 1 and the fixed mold frame 2, the upper mold cavity 4 and the inclined guide post 7 are separated from the movable mold frame 5, and along with the separation, the inclined guide post 7 guides the connected slide seats 12 to slide towards two sides, so that the core 16 and the submarine core gate 3 after injection molding are driven to be broken, and the core 16 is pulled out of the mold cavity because the tip mouth part of the submarine core gate 3 is smaller and is easy to break; the core fixing plate 14 is drawn out, then an ejector roller 13 penetrates through an ejector hole 20 on the lower compound plate 10, an ejector pin 8 is pushed to eject the runner 15 formed by injection molding, the core diving sprue 3 and a product separated from the core 16, and the core is ejected and separated; after the ejector pin is ejected and separated, because the reset rod 21 with the spring is arranged between the ejector pin fixing plate 19 and the movable mold frame 5, when the top roller 13 on the injection molding machine is pulled away, the reset rod 21 drives the ejector pin 8 to move backwards and reset, and the injection molding, separating and ejecting operations are recycled.

As shown in fig. 3, which is an internal schematic view of the front part after the mold opening, the inclined guide post 7 is entirely drawn away from the slide 12, a mold of the mold cavity 11 and the runner 15 is provided on the upper cavity 4, and two positioning posts 17 are respectively provided on two sides of the upper cavity for engaging with the positioning posts 17 on the lower cavity 6 to fix the upper and lower cavities.

As shown in fig. 4, which is a schematic perspective view of an apparatus for separating and ejecting an injection molding product from a gate, a runner 15 has a main runner and a plurality of sub-runners, the main runner is vertically and horizontally connected with the sub-runners, and the sub-runners are symmetrically distributed, the sub-runners have discharge ports, and the discharge ports are connected with the gate 3 of the submerged core; the ejector pins 8 are divided into main ejector pins and auxiliary ejector pins, the main ejector pins are connected with a main runner connected with the runner 15, the auxiliary ejector pins are connected with sub-runners of the runner 15, and the ejector pins 8 are uniformly distributed; the submerged core pouring gate 3 is arranged in the end part of the core 16, the tip end of the submerged core pouring gate 3 penetrates through the side wall of the core 16 to be connected with the mold cavity 11 and is used for injecting materials to form a product, the tip end of the submerged core pouring gate 3 is designed to enable the submerged core pouring gate 3 after injection molding and the product to be more easily broken, marks cannot be left on the product, and attractiveness of the product is guaranteed.

Claims

1. A device for separating and ejecting an injection product from a pouring gate is assembled on a mold for use, and the device is arranged in bilateral symmetry and mainly comprises an ejector pin (8), a flow channel (15) and a core (16) with a submerged core pouring gate (3); the runner (15) is arranged between an upper cavity (4) and a lower cavity (6) of the die, and is provided with a feed inlet and a plurality of discharge outlets, the feed inlet is connected with a sprue bush (18), the upper cavity (4) is connected with the fixed die frame (2), the lower cavity (6) is connected with the movable die frame (5), and the ejector pin (8) penetrates through the movable die frame (5) and the lower cavity (6) to be vertically connected with the runner (15);

the submerged core pouring gate (3) is of an oblique cone type three-dimensional structure, is arranged in the end part of the core (16), one end with a larger opening is connected with a discharge hole of the flow channel (15), the tip end of the submerged core pouring gate (3) faces the direction of the upper cavity (4), core fixing plates (14) are respectively arranged between the core (16) and the fixed mold frame (2) as well as between the core (16) and the movable mold frame (5), a mold cavity (11) is formed between the core (16) and the upper cavity (4) as well as between the core (6) and the lower cavity (6), and the tip end of the submerged core pouring gate (3) penetrates through the side wall of the core (16) and is connected with the mold cavity (11);

the other end of the core (16) is connected with the sliding seat (12);

an inclined guide post (7) is arranged on the sliding seat (12), the inclined guide post (7) penetrates through the sliding seat (12), the front end of the inclined guide post (7) is fixedly connected with the die fixing frame (2), the rear end of the inclined guide post (7) inclines outwards, and the sliding seat (12) moves out of the core (16) when the inclined guide post (7) is pulled away;

the rear end of the ejector pin (8) is connected with an ejector pin fixing plate (19), the ejector roller (13) penetrates through an ejection hole (20) in the lower compound plate (10), and the ejector pin fixing plate (19) is used for ejecting the injection molding runner (15), the submarine core sprue (3) and a product out of the ejector pin (8);

the movable mould frame (5) is connected with the lower compound plate (10) through mould feet (9).

2. An apparatus for separating and ejecting an injection molded product from a gate as claimed in claim 1, wherein the fixed mold frame (2) is provided with an upper complex plate (1).

3. An apparatus for separating and ejecting an injection molded product from a sprue according to claim 2 wherein the sprue bushing (18) is connected to the feed opening of the runner (15) through the upper replica (1) and the upper cavity (4) of the mold.

4. An apparatus for the separation and ejection of an injection molded product from a gate as in claim 1, wherein the core holding plate (14) is fixedly connected to the slide (12).

5. An apparatus for gate separation and ejection of an injection molded product according to claim 1, wherein the runner (15) has a main runner and a plurality of sub-runners, the sub-runners having discharge ports connected to the submarine gate (3).

6. An apparatus for separating and ejecting an injection molded product from a sprue according to claim 4 wherein said ejector pins (8) are divided into main ejector pins and sub ejector pins, said main ejector pins being in contact with a main runner of the runner (15), said sub ejector pins being in vertical contact with a sub runner of the runner (15).

7. The apparatus for separating and ejecting an injection molded product from a gate according to claim 1, wherein the upper cavity (4) and the lower cavity (6) are engaged and connected by a plurality of positioning posts (17), and the positioning posts (17) are divided into upper and lower parts which are respectively disposed on the upper cavity (4) and the lower cavity (6).

8. The apparatus for separating and ejecting an injection molding product from a gate as claimed in claim 1, wherein a reset rod (21) is provided between the needle fixing plate (19) and the movable mold frame (5), and a spring is provided between the reset rod (21) and the needle fixing plate (19) for resetting the needle (8).