CN214026909U

CN214026909U - Demoulding structure of injection molding machine

Info

Publication number: CN214026909U
Application number: CN202022425812.4U
Authority: CN
Inventors: 谭亮
Original assignee: Huizhou Haorun Packaging Technology Co ltd
Current assignee: Huizhou Haorun Packaging Technology Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-08-24
Anticipated expiration: 2030-10-27

Abstract

The utility model relates to a technical field of the injection molding machine drawing of patterns especially relates to an injection molding machine demoulding structure. The device comprises a core, a pulling assembly, a first pulling plate and a second pulling plate; the mold core is arranged at the top of the rear mold and comprises an ejector rod and an insert; the ejector rod is longitudinally arranged along the central shaft of the mold core, one end of the ejector rod is arranged at the top of the mold core, and the other end of the ejector rod is fixedly connected with the first pulling plate; the rear die is provided with a first groove below the core, a positioning block is arranged in the first groove, and the side surface of the positioning block is obliquely arranged towards the central shaft of the core from the bottom to the top; the first pulling plate and the second pulling plate are respectively connected with the front die in a pulling mode through pulling assemblies. The utility model discloses an injection molding demoulding structure is swift effective, and the injection molding can not cause the harm because of the joint with the inserts when guaranteeing the drawing of patterns, has guaranteed the quality of product, has improved the market competition of product, has effectively improved production efficiency, has reduced the manufacturing cost of enterprise.

Description

Demoulding structure of injection molding machine

Technical Field

The utility model relates to a technical field of the injection molding machine drawing of patterns especially relates to an injection molding machine demoulding structure.

Background

With the continuous development of science and technology, more and more products are manufactured by injection molding, and the required shape is manufactured by injection molding through a corresponding mold. When moulding plastics some products that have hole, groove or internal thread, the back injection molding piece of moulding plastics can the joint together with the external tooth of core, and direct ejecting that can not be smooth, otherwise causes the damage or the nonconforming of product easily.

Therefore, when manufacturing products with inner holes, grooves or inner threads, it is common to place an insert inside a mold, manually remove the insert with a tool after injection molding, and eject the injection molded part. The mode not only has long injection molding period, but also needs to consume a large amount of labor cost, and brings a large amount of burden to enterprises. Of course, some automatic injection molding machines are available, but the automatic injection molding machines are complex in structure, prone to failure or misoperation, needing manual repair in implementation and finally needing manual discharging, and cannot achieve injection molding intelligence.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art at least one defect (not enough), provide an injection molding machine demoulding structure.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a demoulding structure of an injection molding machine is applied to the injection molding machine, the injection molding machine comprises a front mould and a rear mould, and the front mould and the rear mould comprise a mould core, a pulling assembly, a first pulling plate and a second pulling plate; the mold core is arranged at the top of the rear mold and comprises an ejector rod and an insert; the ejector rod is longitudinally arranged along the central shaft of the mold core, one end of the ejector rod is arranged at the top of the mold core, and the other end of the ejector rod is fixedly connected with the first pulling plate; the rear die is provided with a first groove below the core, a positioning block is arranged in the first groove, and the side surface of the positioning block is obliquely arranged towards the central shaft of the core from the bottom to the top; the insert is connected to the side face of the positioning block in a sliding mode, the bottom of the insert is horizontally installed on the second pulling plate in a sliding mode, and the top of the insert is provided with external teeth located on the side face of the cavity; the first pulling plate and the second pulling plate are movably arranged on the rear die, one end of the pulling assembly is fixedly connected with the front die, the other end of the pulling assembly is movably clamped with the first pulling plate or the second pulling plate, and the first pulling plate and the second pulling plate are respectively connected with the front die in a pulling mode through the pulling assembly.

Further, the pulling assembly comprises a pull rod, a spring lug and a pressing plate; the first pulling plate and the second pulling plate are respectively provided with a second groove matched with the spring bump; the spring bump is abutted in the second groove through an elastic piece and is arranged on the side surface of the first pulling plate or the second pulling plate in a retractable and protruding mode; one end of the extrusion plate is fixedly connected to the rear die, the other end of the extrusion plate is provided with a first protruding part positioned right above the spring bump, and the opposite surfaces of the first protruding part and the spring bump are respectively provided with a matched inclined surface; one end of the pull rod is fixedly connected with the front die, the other end of the pull rod is provided with a second protruding portion located right below the spring protruding block, the pull rod can be clamped with the bottom of the spring protruding block through the second protruding portion, and the first pull plate or the second pull plate is driven to move upwards through the spring protruding block.

Furthermore, a sliding groove matched with the extrusion plate is formed in the pull rod, and the extrusion plate is arranged in the sliding groove of the pull rod.

Furthermore, the first pulling plate, the second pulling plate and the front die are all rectangular bodies, and two opposite side surfaces of the first pulling plate are respectively connected with two opposite side surfaces of the front die in a pulling manner through two groups of pulling assemblies; and two opposite side surfaces of the second pulling plate are respectively connected with the other two opposite side surfaces of the front mould in a pulling manner through two groups of pulling assemblies.

Furthermore, the length of the extrusion plate is smaller than that of the pull rod, the width of the extrusion plate is smaller than that of the pull rod, and the width of the spring bump is matched with that of the pull rod.

Furthermore, the side of locating piece is provided with the trapezoidal slide bar of falling, be provided with on the inserts with slide bar assorted spout, the inserts passes through the cooperation sliding connection of spout and slide bar on the locating piece.

Further, the number of the inserts is four; the locating piece is the cross, four the inserts set up respectively on four tip sides of cross locating piece.

Further, the top of ejector pin is provided with the kicking block, the top setting of kicking block is in the upper surface of core.

Further, the first pulling plate is arranged below the second pulling plate.

Furthermore, a through hole matched with the ejector rod is formed in the middle of the positioning block; the ejector rod penetrates through the positioning block through the through hole to be fixedly connected with the first pull plate in the rear die.

The utility model discloses an injection molding demoulding structure is swift effective, only need to remove the drawing of patterns that the front mould can accomplish the injection molding fast, and the joint of inserts and injection molding staggers during the drawing of patterns, the injection molding can not cause the strain because of the inserts when guaranteeing the drawing of patterns, the quality of product has been guaranteed, the market competition of product has been improved, simultaneously greatly increased the qualification rate of product, and the drawing of patterns is follow-up can carry out the automatic discharging through the mode that manipulator or gravity break away from, production efficiency has effectively been improved, the manufacturing cost of enterprise has been reduced. Simultaneously, the pulling subassembly of this structure passes through the cooperation of pull rod, spring lug and stripper plate, realizes that the displacement of pull plate is controllable to guarantee that the injection molding is pushed up by the ejector pin and is moved preset the position, wait for the clamp of manipulator or other devices to get the ejection of compact, thereby realize the automatic drawing of patterns and the ejection of compact of injection molding machine, improve the drawing of patterns ejection of compact efficiency of product, through the reliability of reinforcing injection molding machine greatly.

Drawings

Fig. 1 is a three-dimensional structure diagram of the demolding structure of the injection molding machine of the embodiment of the utility model.

Fig. 2 is a front sectional view of the demolding structure of the injection molding machine of the embodiment of the present invention.

Fig. 3 is a side simple structure diagram of the demolding structure of the injection molding machine of the embodiment of the invention.

Fig. 4 is a side sectional view of the demolding structure of the injection molding machine of the embodiment of the present invention.

Fig. 5 is a partial structural view of a drawbar assembly according to an embodiment of the present invention.

Fig. 6 is a partial structural sectional view of a drawbar assembly according to an embodiment of the invention.

Wherein: the device comprises a mold core 1, a pulling assembly 2, a first pulling plate 3, a second pulling plate 4, a top rod 11, an insert 12, a positioning block 13, a spring bump 21, an extrusion plate 22 and a pull rod 23.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

This embodiment provides an injection molding machine demoulding structure, uses and in the injection molding machine, and the injection molding machine includes front mould and back mould, and the front mould docks with the back mould cooperation, and is specific, and this injection molding machine can be used to mould plastics the cup of thermos cup, and is more specific, and the bottom side of cup has the chute, arch or the sunken that need mould plastics through inserts 12 and form.

In this embodiment, refer to fig. 1-6, injection molding machine demoulding structure includes core 1, pulling subassembly 2, first arm-tie 3 and second arm-tie 4, core 1 sets up the top at the back mould, including ejector pin 11 and inserts 12, of course, core 1 still include with cup assorted cover half, ejector pin 11 vertically sets up along the center pin of core 1, and one end sets up the top at core 1, the other end and first arm-tie 3 fixed connection, specifically, first arm-tie 3 can drive ejector pin 11 through self-movement and carry out longitudinal movement, thereby will adhere to the injection molding on core 1 and carry out ejecting. The back mould sets up in first recess in the below of core 1, is provided with locating piece 13 in the first recess, and the side slope of locating piece 13 sets up, and is concrete, and its incline direction draws close to the center pin direction of core 1 for the top of locating piece 13 to from the bottom of locating piece 13 to form the inclined plane, the bottom of locating piece 13 side is compared to the top of locating piece 13 side promptly and is more close to the center pin of core 1. Insert 12 sliding connection is on the side of locating piece 13, and is concrete, but insert 12's bottom level slidable mounting is on second arm-tie 4, and insert 12 is vertical spacing promptly on second arm-tie 4, can drive insert 12 through second arm-tie 4 and vertically reciprocate to realize horizontal migration through the sliding connection on locating piece 13. The top of insert 12 is provided with the external tooth with the chute of cup side, protruding or sunken looks adaptation, and the external tooth sets up the side in type groove, and more specifically, the external tooth sets up the bottom side in type groove. In addition, the first pulling plate 3 and the second pulling plate 4 are movably arranged on the rear die and are respectively connected with the front die in a pulling mode through the pulling assembly 2.

In some embodiments, referring to fig. 5-6, pulling assembly 2 includes a pull rod 23, a spring tab 21, and a stripper plate 22; the first pulling plate 3 and the second pulling plate 4 are respectively provided with a second groove matched with the spring bump 21, and specifically, the length of the second groove is greater than that of the spring bump 21. The spring bump 21 abuts against the second groove through the elastic piece, the retractable protrusion is arranged on the side face of the first pulling plate 3 or the side face of the second pulling plate 4, when the spring bump 21 receives extrusion force towards the direction of the second groove, the spring can be retracted in the second groove through the spring, specifically, the elastic piece is a spring, the two springs are arranged on the spring bump 21, and the two springs are respectively arranged oppositely along the center of the spring bump 21. One end of the extrusion plate 22 is fixed on the rear die, the other end is provided with a first protruding part positioned right above the protruding part of the spring convex block 21, and the opposite surfaces of the second groove part protruding from the first protruding part and the spring convex block 21 are respectively provided with matched inclined surfaces. One end of the pull rod 23 is fixedly connected with the front die, the other end of the pull rod is provided with a second protruding portion located right below the protruding portion of the spring convex block 21, the pull rod 23 can be clamped with the bottom of the spring convex block 21 through the second protruding portion, the spring convex block 21 is pulled to move upwards, and therefore the first pull plate 3 or the second pull plate 4 is driven to move upwards. However, when the pull rod 23 pulls the spring protrusion 21 to move to the extrusion plate 22, the spring protrusion 21 and the extrusion plate 22 are matched with each other through the matched inclined surfaces of the two, the extrusion plate 22 extrudes the spring protrusion 21 towards the second groove, so that the spring protrusion 21 is pressed into the second groove, the clamping between the pull rod 23 and the spring protrusion 21 is released, and the first pull plate 3 or the second pull plate 4 is fixed at the first protruding part of the extrusion plate 22. Specifically, a sliding groove matched with the extrusion plate 22 is formed in the pull rod 23, and the extrusion plate 22 is arranged in the sliding groove of the pull rod 23, so that the pull rod 23 and the extrusion groove are not affected with each other. More specifically, the width of the pull rod 23 is larger than that of the extrusion groove, and the length of the spring bump 21 is matched with the width of the pull rod 23. In addition, the length of the pressing plate 22 is smaller than that of the pull rod 23, and the confirmation of the final position of the first pulling plate 3 or the second pulling plate 4 is realized through the length of the pressing plate 22.

Specifically, the concrete drawing of patterns step of this structure is, after the product is moulded plastics and is accomplished, the front mould passes through push rod or other thrust unit drive front mould and upwards moves, realizes the separation of front mould and back mould, and the front mould drives first arm-tie 3 and second arm-tie 4 upwards to move through pulling subassembly 2 when upwards moving. At this moment, second arm-tie 4 drives inserts 12 and moves upwards, and inserts 12 moves to the center pin of core 1 along the side level of locating piece 13, realize the external tooth of inserts 12 and the chute of injection molding, separation between arch or the sunken, meanwhile, first arm-tie 3 drives ejector pin 11 and moves injection molding rebound through the kicking block top, thereby realize the separation between injection molding and the die cavity, accomplish the drawing of patterns of injection molding, the injection molding is after breaking away from, can directly take to the cup through external manipulator, of course, also can drop through gravity or the ejection of compact of other modes completion cups.

Specifically, the pulling assembly 2 is pulled by the principle that the pull rod 23 is driven by the front die to move upwards, the bottom of the pull rod 23 is clamped with the spring bump 21 and pulls the first pulling plate 3 or the second pulling plate 4 to move upwards, meanwhile, when the spring bump 21 is pulled to the top of the extrusion plate 22, the spring bump 21 is extruded into the second groove of the first pulling plate 3 or the second pulling plate 4 through the inclined plane, the clamping between the spring bump 21 and the pull rod 23 is released, so that the first pulling plate 3 and the second pulling plate 4 are not moved upwards after being driven to the top position of the extrusion block by the pull rod 23, the moving distance of the first pulling plate 3 and the second pulling plate 4 can be effectively controlled, the required moving position is ensured to be removed by pulling connection with the front die, the first pulling plate and the second pulling plate are not moved with the front die, and are elastically fixed at the top position of the extrusion plate 22 through the matching of the extrusion plate 22 and the spring bump 21, the reliability of the injection molding machine is greatly enhanced.

The benefit of this structure lies in, the injection molding machine demoulding structure of this embodiment drives first arm-tie 3 and second arm-tie 4 through the front mould and removes the removal that realizes inserts 12 and ejector pin 11, inserts 12 through with second arm-tie 4 and locating piece 13 be connected the realization and the injection molding between stagger and break away from to guarantee that the injection molding can easily be ejecting through ejector pin 11, thereby realize breaking away from between injection molding and the core 1, accomplish the drawing of patterns of injection molding. The injection molding demoulding structure of this structure is swift effective, only need to remove the front mould and can accomplish the drawing of patterns of injection molding fast, and the joint of inserts 12 and injection molding staggers during the drawing of patterns, the injection molding can not cause the harm because of inserts 12's joint when guaranteeing the drawing of patterns, the quality of product has been guaranteed, the market competitiveness of product has been improved, simultaneously greatly increased the qualification rate of product, and the follow-up mode that can break away from through manipulator or gravity of the drawing of patterns carries out the automatic discharge, the production efficiency is effectively improved, the manufacturing cost of enterprise has been reduced. Simultaneously, the pulling assembly 2 of this structure passes through pull rod 23, spring lug 21 and stripper plate 22's cooperation, realizes that the displacement of pull plate is controllable to guarantee that the injection molding is pushed to preset position by ejector pin 11, wait for the clamp of manipulator or other devices to get the ejection of compact, thereby realize the automatic drawing of patterns and the ejection of compact of injection molding machine, improve the drawing of patterns ejection of compact efficiency of product, through the reliability of reinforcing injection molding machine greatly.

In some embodiments, referring to fig. 1 to 4, the first pulling plate 3, the second pulling plate 4 and the front mold are rectangular bodies, two opposite side surfaces of the first pulling plate 3 are connected to two corresponding side surfaces of the front mold through two sets of pulling assemblies 2, respectively, and the other two side surfaces of the front mold are connected to two corresponding side surfaces of the second pulling plate 4, that is, the first pulling plate 3 and the second pulling plate 4 are respectively connected to four side surfaces of the front mold in a two-by-two staggered manner. The first pulling plate 3, the second pulling plate 4 and the front die are connected firmly, and the reliability of the device is enhanced.

In some embodiments, a side surface of the positioning block 13 is provided with an inverted trapezoidal sliding rod, the insert 12 is provided with a sliding groove matched with the sliding rod, the insert 12 is slidably connected to the positioning block 13 through the matching of the sliding groove and the sliding rod, when the second pulling plate 4 moves, the insert 12 moves on the sliding rod through the sliding groove, so that the horizontal position on the second pulling plate 4 moves, because the positioning block 13 inclines towards the central axis of the mold core 1 from bottom to top, the insert 12 moves towards the central axis of the mold core 1 along the side surface of the positioning block 13, and thus the longitudinal clamping between the external teeth and the injection molding part is staggered. More specifically, the number of the inserts 12 is four, the positioning block 13 is cross-shaped, and the four inserts 12 are respectively connected to four end side faces of the cross-shaped positioning block 13.

For better operation experience, the injection molding machine demoulding structure's of this embodiment concrete structure is provided, and is concrete, and demoulding structure ejector pin 11's top is provided with the kicking block, and the kicking block top sets up the upper surface at core 1, and its top is the plane, and the kicking block can increase the contact surface between ejector pin 11 and the injection molding, causes the harm to the injection molding when preventing ejector pin 11 ejecting. Meanwhile, the first pulling plate 3 is arranged below the second pulling plate 4, a through hole matched with the diameter of the ejector rod 11 is formed in the middle of the positioning block 13, and the ejector rod 11 penetrates through the positioning block 13 through the through hole to be fixedly connected with the first pulling plate 3 in the rear die.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A demoulding structure of an injection molding machine is applied to the injection molding machine, the injection molding machine comprises a front mould and a rear mould, and is characterized by comprising a mold core (1), a pulling assembly (2), a first pulling plate (3) and a second pulling plate (4); the mold core (1) is arranged at the top of the rear mold and comprises a mandril (11) and an insert (12); the ejector rod (11) is longitudinally arranged along the central shaft of the mold core (1), one end of the ejector rod is arranged at the top of the mold core (1), and the other end of the ejector rod is fixedly connected with the first pulling plate (3); a first groove is formed in the rear die below the mold core (1), a positioning block (13) is arranged in the first groove, and the side face of the positioning block (13) is obliquely arranged from the bottom to the top towards the central shaft of the mold core (1); the insert (12) is connected to the side face of the positioning block (13) in a sliding mode, the bottom of the insert (12) is horizontally installed on the second pulling plate (4) in a sliding mode, and external teeth located on the side face of the cavity are arranged at the top of the insert; first arm-tie (3) and second arm-tie (4) activity set up on the back mould, pulling subassembly (2) one end and front mould fixed connection, the other end with first arm-tie (3) or second arm-tie (4) activity joint, first arm-tie (3) and second arm-tie (4) respectively through pulling subassembly (2) with the front mould is pulled and is connected.

2. The injection molding machine demolding structure as claimed in claim 1, wherein said pulling assembly (2) comprises a spring boss (21), a stripper plate (22) and a pull rod (23); second grooves matched with the spring lugs (21) are respectively formed in the first pulling plate (3) and the second pulling plate (4); the spring bump (21) is abutted in the second groove through an elastic piece and is arranged on the side surface of the first pulling plate (3) or the second pulling plate (4) in a retractable and protruding mode; one end of the extrusion plate (22) is fixedly connected to the rear die, the other end of the extrusion plate is provided with a first protruding part positioned right above the spring convex block (21), and the opposite surfaces of the first protruding part and the spring convex block (21) are respectively provided with matched inclined surfaces; one end of the pull rod (23) is fixedly connected with the front die, the other end of the pull rod is provided with a second protruding portion located under the spring protruding block (21), the pull rod (23) can be clamped with the bottom of the spring protruding block (21) through the second protruding portion, and the first pull plate (3) or the second pull plate (4) is driven to move upwards through the spring protruding block (21).

3. The injection molding machine demolding structure according to claim 2, wherein a sliding groove adapted to the compression plate (22) is provided in the tie bar (23), and the compression plate (22) is provided in the sliding groove of the tie bar (23).

4. The injection molding machine demolding structure according to claim 2, wherein the first pulling plate (3), the second pulling plate (4) and the front mold are all rectangular bodies, and two opposite side surfaces of the first pulling plate (3) are respectively connected with two opposite side surfaces of the front mold in a pulling mode through two groups of pulling assemblies (2); two opposite side surfaces of the second pulling plate (4) are respectively connected with the other two opposite side surfaces of the front die in a pulling mode through two groups of pulling assemblies (2).

5. The injection molding machine demolding structure according to claim 2, wherein the length of the pressing plate (22) is smaller than the length of the pull rod (23), the width of the pressing plate (22) is smaller than the width of the pull rod (23), and the width of the spring projection (21) is adapted to the width of the pull rod (23).

6. The injection molding machine demoulding structure according to claim 1, wherein the side of the positioning block (13) is provided with an inverted trapezoidal sliding rod, the insert (12) is provided with a sliding groove matched with the sliding rod, and the insert (12) is slidably connected to the positioning block (13) through the matching of the sliding groove and the sliding rod.

7. The injection molding machine demolding structure according to claim 6, wherein said inserts (12) are provided in four; the positioning block (13) is in a cross shape, and the inserts (12) are respectively arranged on the side faces of four end parts of the cross-shaped positioning block (13).

8. An injection molding machine ejector structure according to any one of claims 1 to 7, wherein the top of the ejector pin (11) is provided with an ejector block, the top of which is provided on the upper surface of the core (1).

9. An injection molding machine ejector structure according to any one of claims 1-7, wherein the first pull plate (3) is disposed below the second pull plate (4).

10. The injection molding machine demolding structure according to any one of claims 1-7, wherein a through hole matched with the ejector rod (11) is formed in the middle of the positioning block (13); the ejector rod (11) penetrates through the positioning block (13) through the through hole to be fixedly connected with the first pulling plate (3) in the rear die.