CN111873329A

CN111873329A - Core pulling device for demoulding of injection mold

Info

Publication number: CN111873329A
Application number: CN202010817509.0A
Authority: CN
Inventors: 张玉龙; 顾锋
Original assignee: Suzhou Chenxu Biotechnology Co ltd
Current assignee: Suzhou Chenxu Biotechnology Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-11-03

Abstract

The invention discloses a core pulling device for demoulding of an injection mould, which comprises a base and a mould core for injection moulding, wherein the mould core for injection moulding is arranged at the front end of the base, the upper surface of the base is an inclined plane, a first sliding block is arranged on the base in a sliding manner, guide blocks for limiting the sliding direction of the first sliding block are arranged on two sides of the base, a shoveling machine is connected to the front end of the first sliding block in a pivot manner, a second sliding block connected with the first sliding block is arranged on the shoveling machine in a sliding manner, an inclined guide post for driving the first sliding block to slide is inserted in the first sliding block, and when the inclined guide post drives the first sliding block to move backwards, the second sliding block slides downwards. The invention has the following beneficial effects: the second sliding block moves downwards by moving the first sliding block backwards, so that the tip of the second sliding block is separated from the side groove of the injection product, the integrity of the injection product is guaranteed, the injection product is prevented from being damaged by pulling, and the qualified rate of the product is improved.

Description

Core pulling device for demoulding of injection mold

Technical Field

The invention relates to the technical field of mold demolding equipment, in particular to a core pulling device for demolding of an injection mold.

Background

After the injection mold performs injection molding on a plastic product, the problem that the slider direction is difficult to directly demold and back-off exists in a slider core pulling molding area of the plastic product, and the back-off structure is often clamped with the slider together. If the plastic product has a deeper internal inverted buckle groove, the conventional demoulding mode of outwards moving the core pulling is not suitable for forced demoulding, otherwise, the groove edge of the inverted buckle groove is easily damaged by pulling, or the core pulling of the mould is abraded, so that the shape of the next injection-moulded product is in error. Especially for products with higher requirements on the structural precision of the products, such as medical devices, the problem of incapability of assembling can be easily caused, even the use effect of the products can be directly influenced, the product qualification rate is reduced, and the production cost is increased.

Therefore, if the core-pulling demoulding of the product with the inverted buckle structure is carried out rapidly and nondestructively, the problem to be solved is urgent at present.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a core-pulling device for demoulding of an injection mould.

The purpose of the invention is realized by the following technical scheme:

injection mold drawing of patterns is with device of loosing core, including base and the mould benevolence that is used for moulding plastics, the front end of base is provided with the mould benevolence that is used for moulding plastics, the upper surface of base is the inclined plane, it is provided with first slider to slide on the base, the both sides of base are provided with the inject the guide block of first slider slip direction, the front end pivotally connected with of first slider shovels the machine, it is provided with to slide on the shovel machine with the second slider that first slider links to each other, first slider interpolation is equipped with its gliding oblique guide pillar of drive, works as the oblique guide pillar drive during first slider rearward movement, the second slider lapse.

Preferably, the top of the inclined guide post is fixedly connected with a front module arranged on the upper part of the base through a fixing block, and the inclined guide post is obliquely inserted into the first sliding block and can synchronously vertically move up and down along with the fixing block.

Preferably, the second slider is connected with the first slider through a connecting mechanism, the connecting mechanism includes a connecting screw rod and an elastic member, the connecting screw rod is slidably inserted into the first slider, a threaded end of the connecting screw rod extends out of the first slider and is fixedly connected with the second slider, the elastic member is sleeved on the connecting screw rod, and two ends of the elastic member are respectively abutted to a front end face of the first slider and a rear end face of the second slider.

Preferably, the front end of the second sliding block is provided with a tip protruding upwards, and the second sliding block is clamped with the side groove of the product formed by injection molding in the mold core through the tip.

Preferably, the bottom of the second sliding block is provided with a groove, the upper surface of the shovel machine is provided with a guide strip matched with the groove, and the bottom surface of the second sliding block and the upper surface of the shovel machine are inclined planes matched with each other.

Preferably, the inclination of the upper surface of the shovel is greater than the inclination of the upper surface of the base.

Preferably, a limit screw for blocking the first sliding block to slide is fixedly arranged on the upper surface of the higher end of the base, and a first concave portion capable of being clamped with the limit screw is arranged at the bottom of the rear section of the first sliding block.

Preferably, a limiting block is embedded in the lower end of the base, a convex rib protruding out of the upper surface of the base is arranged on the upper surface of the limiting block, and a second concave part matched with the convex rib is arranged at the bottom of the first sliding block; the distance between the first concave part and the second concave part is equal to the distance between the limiting screw and the convex rib.

Preferably, the two sides of the first sliding block are provided with convex blocks, the bottom of the guide block is provided with a limiting groove matched with the convex blocks, and the convex blocks are clamped in the limiting groove.

Preferably, the mold insert is provided with a clamping block, and a protruding end of the clamping block is clamped in a limiting clamping groove on the side edge of the second sliding block so as to prevent the second sliding block from moving backwards.

The invention has the following beneficial effects:

1. the first sliding block and the second sliding block are connected, and the second sliding block moves downwards by moving the first sliding block backwards, so that the tip end of the second sliding block is separated from the side groove of the injection molding product, the integrity of the injection molding product is ensured, the injection molding product is prevented from being damaged by pulling, and the qualification rate of the product is improved;

2. the structure that the first sliding block and the second sliding block are matched can be widely applied to demoulding of the inverted product, so that the practicability of the invention is improved;

3. the guide blocks on the two sides of the base can limit the sliding direction of the first sliding block to prevent the first sliding block from deviating out of the surface of the base;

4. the limiting screw and the limiting block arranged on the base have a limiting effect on the first sliding block, so that the first sliding block can keep still when sliding to the highest position of the base, and the demolding time of an injection molding product is reserved;

5. the inclination of the surface of the base is smaller than that of the surface of the shovel, so that after the shovel moves backwards along with the first sliding block, the second sliding block moves downwards due to backward movement of the shovel; meanwhile, the clamping block on the die core clamps the second sliding block to prevent the second sliding block from moving backwards;

6. an elastic part is arranged between the first sliding block and the second sliding block, so that the first sliding block can be separated from the second sliding block after moving backwards.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1: a schematic diagram of an embodiment of the invention;

FIG. 2: an explosion diagram of an embodiment of the invention;

FIG. 3: an explosion diagram from another perspective of an embodiment of the present invention;

FIG. 4: a cross-sectional view of an operating state of an embodiment of the present invention;

FIG. 5: a cross-sectional view of an operating state of an embodiment of the present invention;

FIG. 6: a cross-sectional view of an operating state of an embodiment of the present invention;

FIG. 7: schematic representation of an injection molded product in an embodiment of the invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 1 to 6, the invention discloses a core pulling device for demolding an injection mold, which includes a base 1 and a mold core 7 for injection molding, wherein the upper surface of the base 1 is an inclined surface, a first slider 2 is slidably arranged on the base 1, guide blocks 3 for limiting the sliding direction of the first slider 2 are arranged on two sides of the base 1, a shovel machine 4 is pivotally connected to the front end of the first slider 2, a second slider 5 connected to the first slider 2 is slidably arranged on the shovel machine 4, an inclined guide post 6 for driving the first slider 2 to slide is inserted into the first slider 2, and when the inclined guide post 6 drives the first slider 2 to move backwards, the second slider 5 slides downwards.

Specifically, as shown in fig. 7, the product injection molded by the mold core 7 according to the present invention has a concave side groove 11 at the top, the front end of the second slider 5 has a tip 501 protruding upward, a part of the side groove 11 is defined by the tip 501, and before the product is demolded, the tip 501 is clamped in the side groove 11.

Specifically, as shown in fig. 1, 4, 5 and 6, the top of the inclined guide post 6 is fixedly connected to a front mold (not shown) disposed on the upper portion of the base 1 through a fixing block 8. The diameter of the head part of the inclined guide post 6 is larger than that of the rod part of the inclined guide post, and the head part of the inclined guide post is clamped inside the fixing block 8; a through hole 204 matched with the rod part of the inclined guide post 6 is obliquely arranged in the first sliding block 2, the rod part of the inclined guide post 6 is obliquely inserted into the through hole 204 in the first sliding block 2, and the inclined guide post 6 can synchronously vertically move up and down along with the fixed block 8. The inclined guide post 6 is arranged obliquely, so that driving force can be provided for the first sliding block 2, and the working principle of the inclined guide post 6 is as follows: the inclined guide post 6 and the fixing block 8 are clamped, so that when the front die is moved up and down for demolding, the inclined guide post 6 can move up and down along the vertical direction along with the fixing block 8 synchronously. The inclined guide post 6 is obliquely inserted into the first slider 2, so that when the inclined guide post 6 vertically moves up and down, the first slider 2 can synchronously move back and forth along with the inclined guide post 6. Specifically, in the preferred embodiment, the inclined guide post 6 is inclined from top to bottom to the right, so when the inclined guide post 6 is moved upwards, the first sliding block 2 moves rightwards; when the inclined guide post 6 is moved downwards, the first slide block 2 moves leftwards.

As shown in fig. 3, in order to define the sliding direction of the first sliding block 2, two sides of the first sliding block 2 are provided with protrusions 203, the bottom of the guide block 3 is provided with a limiting groove 301 matched with the protrusions 203, and the protrusions 203 are clamped in the limiting groove 301, so that the first sliding block 2 slides along the guide block 3 to avoid being offset from the upper surface of the base 1.

In the present invention, the second slider 5 is connected to the first slider 2 through a connecting mechanism, as shown in fig. 2 to 6, the connecting mechanism includes a connecting screw 9 and an elastic member 10, the connecting screw 9 is slidably inserted into the first slider 2, and the diameter of the head portion of the connecting screw 9 is larger than that of the rod portion of the connecting screw, so that the connecting screw 9 can be clamped into an insertion hole 205 in the first slider 2, the inner contour of the insertion hole 205 is matched with the connecting screw 9, and the threaded end of the connecting screw 9 extends out of the insertion hole 205 and is fixedly connected to the second slider 5. The depth of the head of the insertion hole 205 is greater than the height of the head of the connection screw 9 so that the connection screw 9 can move a distance within the first slider 2. The elastic element 10 is sleeved on the connecting screw rod 9, and two ends of the elastic element are respectively abutted against the front end face of the first sliding block 2 and the rear end face of the second sliding block 5. The elastic member 10 in the preferred embodiment is a spring, and in other possible embodiments, it can be made of other elastic materials. The elastic member 10 is disposed to ensure that the second sliding block 5 can be separated from the first sliding block 2, and the front and rear positions of the second sliding block 5 are not affected when the first sliding block 2 moves backwards.

Further, in order to define the sliding direction of the second sliding block 5, the bottom of the second sliding block 5 has a groove 502, the upper surface of the shovel 4 has a guide bar 401 matching with the groove 502, and the groove 502 is sleeved on the guide bar 401 to enable the second sliding block 5 to slide along the guide bar 401.

In order to accelerate the downward sliding of the second slide block 5, the bottom surface of the second slide block 5 and the upper surface of the shovel machine 4 are inclined surfaces matched with each other. Further, the inclination of the upper surface of the shovel 4 is greater than the inclination of the upper surface of the base 1. The structure is such that after the shovel 4 moves backward following the first slider 2, the displacement distance of the second slider 5 in the vertical direction is greater than that of the first slider 2 for the same horizontal distance, that is, the second slider 5 moves downward due to the backward movement of the shovel 4, so that the tip 501 is unhooked from the side groove 11.

In order to further prevent the second sliding block 5 from moving backwards along with the first sliding block 2, a clamping block 14 is arranged on the die core 7, and a protruding end 1401 of the clamping block 14 is clamped in a limiting clamping groove 503 on the side of the second sliding block 5 to block the second sliding block 5 from moving backwards. The limiting clamping groove 503 is vertically arranged on the side of the second sliding block 5, so that the clamping block 14 has a downward guiding function for the second sliding block 5.

In order to limit the backward movement distance of the first sliding block 2, a limit screw 12 for blocking the first sliding block 2 from sliding is fixedly arranged on the upper surface of the higher end of the base 1, and a first concave portion 201 capable of being clamped with the limit screw 12 is arranged at the bottom of the rear section of the first sliding block 2.

Further, a limiting block 13 is embedded in the lower end of the base 1, a convex rib 1301 protruding out of the upper surface of the base 1 is arranged on the upper surface of the limiting block 13, and a second concave portion 202 matched with the convex rib 1301 is arranged at the bottom of the first sliding block 2; the distance between the first recess 201 and the second recess 202 is equal to the distance between the stop screw 12 and the rib 1301.

As shown in fig. 5, when the first concave portion 201 is engaged with the limit screw 12, the second concave portion 202 is just engaged with the rib 1301 to stabilize the position of the first sliding block 2, so that the first sliding block can be kept stationary on the surface of the base 1, and the first sliding block is prevented from sliding down along the upper surface of the base 1, so that the demolding time can be reserved. At this time, as shown in fig. 6, the tip 501 of the second slider 5 is not only separated from the side groove 11, but the second slider 5 is driven by the first slider 2 to move backward for a certain distance, so that a certain gap exists between the second slider 5 and the side groove 11, and the product can be completely ejected by the jacking mechanism at the bottom of the product.

As shown in fig. 4 to 6, the working process of the present invention is:

firstly, moving a fixed block 8 upwards to enable an inclined guide post 6 to move upwards synchronously along with the fixed block 8, and simultaneously driving a first sliding block 2 to move backwards by the inclined guide post 6;

secondly, the shovel machine 4 is separated from the second sliding block 5 and moves backwards synchronously along with the first sliding block 2, along with the backward movement of the shovel machine 4, the second sliding block 5 moves downwards to enable the tip 501 to be separated from the side groove 11, and at the moment, the front end face of the second sliding block 5 is still attached to the side wall of the product;

finally, the first sliding block 2 is clamped with the limiting screw 12 and the limiting block 13 respectively, and at the moment, the second sliding block 5 is separated from the side wall of the product.

The injection molding machine has a delicate structure, the first sliding block 2 is moved backwards to enable the second sliding block 5 to move downwards, so that the tip 501 of the second sliding block 5 is separated from the side groove 11 of an injection molding product, the completeness of the injection molding product is guaranteed, the injection molding product is prevented from being damaged by pulling, and the qualification rate of the product is improved.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. Injection mold drawing of patterns is with device of loosing core, including base (1), the front end of base (1) is provided with mould benevolence (7) that are used for moulding plastics, its characterized in that: the upper surface of the base (1) is an inclined plane, a first sliding block (2) is arranged on the base (1) in a sliding mode, guide blocks (3) for limiting the sliding direction of the first sliding block (2) are arranged on two sides of the base (1), a shovel machine (4) is connected to the front end of the first sliding block (2) in a pivot mode, a second sliding block (5) connected with the first sliding block (2) is arranged on the shovel machine (4) in a sliding mode, an inclined guide pillar (6) for driving the first sliding block (2) to slide is inserted into the first sliding block (2), and when the inclined guide pillar (6) drives the first sliding block (2) to move backwards, the second sliding block (5) slides downwards.

2. The core pulling device for demolding an injection mold according to claim 1, characterized in that: the top of the inclined guide post (6) is fixedly connected with a front die arranged on the upper portion of the base (1) through a fixing block (8), and the inclined guide post (6) is obliquely inserted into the first sliding block (2) and can synchronously vertically move up and down along with the fixing block (8).

3. The core pulling device for demolding an injection mold according to claim 1, characterized in that: the second sliding block (5) is connected with the first sliding block (2) through a connecting mechanism, the connecting mechanism comprises a connecting screw rod (9) and an elastic piece (10), the connecting screw rod (9) is slidably inserted into the first sliding block (2), the threaded end of the connecting screw rod extends out of the first sliding block (2) and is fixedly connected with the second sliding block (5), the elastic piece (10) is sleeved on the connecting screw rod (9), and the two ends of the elastic piece are respectively abutted to the front end face of the first sliding block (2) and the rear end face of the second sliding block (5).

4. The core pulling device for demolding an injection mold according to claim 1, characterized in that: the front end of the second sliding block (5) is provided with a tip (501) protruding upwards, and the second sliding block (5) is clamped with the edge groove (11) of the product formed by injection molding in the die core (7) through the tip (501).

5. The core pulling device for demolding an injection mold according to claim 1, characterized in that: the bottom of the second sliding block (5) is provided with a groove (502), the upper surface of the shovel (4) is provided with a guide strip (401) matched with the groove (502), and the bottom surface of the second sliding block (5) and the upper surface of the shovel (4) are inclined surfaces matched with each other.

6. The core pulling device for demolding an injection mold according to claim 5, characterized in that: the inclination of the upper surface of the shovel (4) is greater than the inclination of the upper surface of the base (1).

7. The core pulling device for demolding an injection mold according to claim 1, characterized in that: the upper surface of the higher end of the base (1) is fixedly provided with a limit screw (12) for blocking the sliding of the first sliding block (2), and the bottom of the rear section of the first sliding block (2) is provided with a first concave part (201) which is clamped with the limit screw (12).

8. The core pulling device for demolding an injection mold according to claim 7, characterized in that: a limiting block (13) is embedded in the lower end of the base (1), a convex rib (1301) protruding out of the upper surface of the base (1) is arranged on the upper surface of the limiting block (13), and a second concave part (202) matched with the convex rib (1301) is arranged at the bottom of the first sliding block (2); the distance between the first recess (201) and the second recess (202) is equal to the distance between the stop screw (12) and the rib (1301).

9. The core pulling device for demolding an injection mold according to claim 1, characterized in that: the two sides of the first sliding block (2) are provided with convex blocks (203), the bottom of the guide block (3) is provided with limiting grooves (301) matched with the convex blocks (203), and the convex blocks (203) are clamped in the limiting grooves (301).

10. The core pulling device for demolding an injection mold according to claim 1, characterized in that: a clamping block (14) is arranged on the die core (7), and a protruding end (1401) of the clamping block (14) is clamped in a limiting clamping groove (503) on the side of the second sliding block (5) to prevent the second sliding block from moving backwards.