CN223890414U - Automatic demoulding structure for injection molding machine - Google Patents

Abstract

The utility model discloses an automatic demoulding structure for an injection molding machine, which comprises a fixed die holder and a mounting seat arranged at the other end, wherein a fixed die block is fixedly arranged on the fixed die holder, a positioning seat is fixedly arranged on one side of the mounting seat, four groups of oil cylinders penetrate through the positioning seat on the mounting seat, a pushing rod is arranged at the end part of each oil cylinder, a pushing frame is fixedly arranged at the end part of each pushing rod, a movable die frame is arranged between the pushing frame and the fixed die block, and a material piece is injected between the movable die frame and the fixed die block. The utility model reduces the times and steps of demolding, simultaneously performs internal and external demolding, increases partial overlapping time, accelerates the demolding time, ensures the demolding effect and improves the demolding efficiency.

Description

Automatic demoulding structure for injection molding machine

Technical Field

The utility model belongs to the technical field of injection molding machines, and particularly relates to an automatic demolding structure for an injection molding machine.

Background

Injection molding machines are also known as injection molding machines or injection molding machines. It is a main forming equipment for making thermoplastic plastics or thermosetting plastics into various shaped plastic products by using plastic forming mould. The device is divided into vertical type, horizontal type and full-electric type. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and injects the molten plastic to fill the mold cavity.

The utility model patent with the domestic application number 202323276842.3 discloses an internal thread demoulding mechanism of an injection molding part, which comprises a slide block core-pulling assembly and a thread core-pulling assembly, wherein the slide block core-pulling assembly consists of a slide block core-pulling insert, a slide block group, a push plate, an oil cylinder and a slide groove module, the slide block core-pulling insert consists of a forming end and a transmission rod, a mounting groove is arranged in the slide block group, slide rails are arranged on two sides of the slide block group, the oil cylinder is symmetrically arranged on templates on two sides of the slide block group, the thread core-pulling assembly consists of the thread core-pulling insert, a transmission part, a shaft sleeve, a driven gear, a driving gear and a motor, the thread core-pulling insert is sleeved on the periphery of the forming end, a through hole is arranged on the transmission part, a mounting seat is arranged on the driven gear, and the tail end of the transmission part is in sliding connection with the shaft sleeve. After the motor is used for threaded core pulling, the double cylinders symmetrically arranged are used for pushing the sliding block core pulling assembly to pull the core, so that the problem that threads are easy to damage in the threaded core pulling process is solved, and the occurrence of a clamping and stopping condition in the core pulling process is prevented. The utility model is used for demolding a structure with threads in an injection molding part, the thread structure can only rotationally demold through the trend of the threads in the demolding process, the internal thread structure needs to demold the external structure and then demold the threads in the demolding process, the demolding steps are more, the demolding can not be completed in the same time period, and the demolding time is prolonged, so that the demolding efficiency is reduced.

Disclosure of utility model

In order to solve the technical problems, the utility model provides an automatic demolding structure for an injection molding machine, which comprises a fixed mold base and a mounting seat arranged at the other end, wherein a fixed mold is fixedly arranged on the fixed mold base, a positioning seat is fixedly arranged on one side of the mounting seat, four groups of oil cylinders penetrate through the positioning seat and are fixedly arranged on the mounting seat, a pushing rod is arranged at the end part of each oil cylinder, a pushing frame is fixedly arranged at the end part of each pushing rod, a movable mold frame is arranged between the pushing frame and the fixed mold block, and a material piece is injected between the movable mold frame and the fixed mold block.

The injection molding device comprises a fixed mold seat, a fixed mold seat and a movable mold seat, wherein the fixed mold seat is provided with a main runner in butt joint with an injection nozzle, the fixed mold seat is provided with a corresponding injection channel at the same position of the main runner, and an injection cavity is arranged inside the fixed mold seat.

The injection molding material is pushed into the main flow channel by the nozzle, and the injection cavity is filled and molded by the injection channel.

As a further preferable technical scheme of the utility model, one side of the positioning seat, which is close to the pushing frame, is fixedly provided with a threaded auxiliary guide rod.

The screw thread auxiliary guide rod assists the pushing frame to release the die.

The pushing frame is characterized in that a rotating block is arranged at the center of the pushing frame, a circle of rotating block is arranged between the outer part of the rotating block and the pushing frame in a rotating way through a hollow bearing seat, and a thread moving module is fixedly arranged at one end of the rotating block.

When the workpiece with the internal screw thread state is injection molded, the screw thread moving module and the fixed module with specified sizes are required to be matched for injection molding.

The rotating block is installed through the threaded auxiliary guide rod in a threaded manner, and an auxiliary cavity is formed in the threaded movable module.

When the pushing frame is pulled by the pushing rod to carry out demoulding, the rotating block rotates outside the screw thread auxiliary guide rod and rotates through the hollow bearing seat auxiliary rotating block, so that the rotating block drives the screw thread movable module to rotate, and the demoulding effect of the screw thread structure is achieved.

The utility model further provides a preferable technical scheme, wherein four groups of positioning rods are fixedly arranged between the positioning seat and the fixed mold seat, four groups of sliding blocks are arranged outside the movable mold frame in a circle, the sliding blocks are slidably arranged on the positioning rods, and limiting blocks are fixedly arranged on the positioning rods.

After injection molding is finished, the movable mold frame is stressed to slide in the opposite direction of the fixed mold block, so that the material piece is demoulded, and the sliding distance of the movable mold frame is limited by the limiting block.

The movable die frame is provided with a groove at one side of the threaded movable die block, and a threaded butt hole is formed on the movable die frame in a matched mode with the threaded movable die block.

In the demolding process, the pushing frame is pulled by the pushing rod, and the movable mold frame moves according to the movement of the pushing frame according to the binding force between the threaded movable mold block and the material piece when injection molding is completed.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

1. When the pushing frame is pulled by the pushing rod to release the mold, the rotating block rotates outside the screw auxiliary guide rod and rotates through the hollow bearing seat auxiliary rotating block, so that the rotating block drives the screw movable module to rotate, the demolding effect on the screw structure is achieved, and damage to the screw structure after injection molding is avoided.

2. In the demolding process, the pushing frame is pulled by the pushing rod, the movable mold frame moves according to the movement of the pushing frame according to the attaching force existing between the threaded movable mold frame and the material piece when injection molding is completed, and the rotating block rotates outside the threaded auxiliary guide rod in the moving process, so that the threaded movable mold frame is simultaneously demolded, the times and steps of demolding are reduced, inner and outer demolding are simultaneously performed, the time for partially overlapping is increased, the demolding time is accelerated, and the demolding efficiency is improved while the demolding effect is ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the injection molding process of the present utility model;

FIG. 3 is a schematic cross-sectional view of the demolding process of the present utility model;

Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

In the figure, 1, a fixed die seat, 11, a main runner, 2, a mounting seat, 21, an oil cylinder, 22, a pushing rod, 23, a positioning rod, 24, a limiting block, 3, a fixed die block, 31, an injection channel, 32, an injection cavity, 4, a positioning seat, 41, a threaded auxiliary guide rod, 5, a movable die frame, 51, a sliding block, 52, a groove, 53, a threaded butt joint hole, 6, a pushing frame, 61, a rotating block, 62, a hollow bearing seat, 63, a threaded movable die block, 64, an auxiliary cavity and 7, a material piece.

Detailed Description

The embodiment is an automatic demolding structure for an injection molding machine.

The utility model is used for demolding a structure with threads in an injection molding part, the thread structure can only rotationally demold through the trend of the threads in the demolding process, the internal thread structure needs to demold the external structure and then demold the threads in the demolding process, the demolding steps are more, the demolding can not be completed in the same time period, and the demolding time is prolonged, so that the demolding efficiency is reduced.

The structure is schematically shown in fig. 1-4. The utility model provides an automatic demoulding structure for injection molding machine, includes fixed die holder 1 and installs the mount pad 2 at the other end, fixed die holder 1 is gone up fixed mounting and is had been decided module 3, has been seted up on the fixed die holder 1 with the sprue 11 of injection nozzle butt joint, is located sprue 11 coplanar department on the fixed die module 3 and has been seted up corresponding injection passageway 31. The fixed module 3 is internally provided with an injection molding cavity 32. The injection molding material is pushed into the main flow channel 11 by the nozzle, and the injection cavity 32 is filled and molded by the injection channel 31. A positioning seat 4 is fixedly arranged on one side of the mounting seat 2, four groups of oil cylinders 21 penetrate through the positioning seat 4 and are fixedly arranged on the mounting seat 2, pushing rods 22 are arranged at the end parts of the oil cylinders 21, and pushing frames 6 are fixedly arranged at the end parts of the pushing rods 22. The side of the positioning seat 4 close to the pushing frame 6 is fixedly provided with a screw thread auxiliary guide rod 41. The push frame 6 is assisted by a screw-thread assisted guide 41 for demoulding. A rotating block 61 is arranged at the center of the pushing frame 6, a circle of the outside of the rotating block 61 is rotatably arranged with the pushing frame 6 through a hollow shaft bearing seat 62, and a thread moving module 63 is fixedly arranged at one end of the rotating block 61. In injection molding of a work piece having a screw thread inside, it is necessary to perform injection molding by matching a screw thread movable module 63 of a predetermined size with a fixed module 3.

The rotating block 61 is installed through the screw auxiliary guide rod 41 by screw threads, and an auxiliary cavity 64 is formed in the screw movable module 63. When the pushing frame 6 is pulled by the pushing rod 22 to perform demoulding, the rotating block 61 rotates outside the thread auxiliary guide rod 41, and the hollow bearing seat 62 assists the rotating block 61 to rotate, so that the rotating block 61 drives the thread moving module 63 to rotate, the demoulding effect on the thread structure is achieved, and damage to the thread structure after injection molding is avoided. A material piece 7 is injected between the movable die frame 5 of the movable die frame 5 and the fixed die block 3, and the material piece 7 is injected in the injection cavity 32.

Four groups of positioning rods 23 are fixedly arranged between the positioning seat 4 and the fixed die seat 1, four groups of sliding blocks 51 are arranged outside the movable die frame 5 in a circle, the sliding blocks 51 are slidably arranged on the positioning rods 23, and limiting blocks 24 are fixedly arranged on the positioning rods 23. After injection molding is finished, the movable mold frame 5 is stressed to slide in the opposite direction of the fixed mold block 3, so that the material piece 7 is demoulded, and the sliding distance of the movable mold frame 5 is limited by the limiting block 24. The movable mould frame 5 is provided with a groove 52 at one side of the threaded movable mould block 63, and the movable mould frame 5 is provided with a threaded butt joint hole 53 in cooperation with the threaded movable mould block 63. In the demolding process, the pushing frame 6 is pulled by the pushing rod 22, the movable mold frame 5 is moved according to the movement of the pushing frame 6 according to the bonding force between the threaded movable mold 63 and the material piece 7 when injection molding is completed, and the rotating block 61 rotates outside the threaded auxiliary guide rod 41 in the moving process, so that the threaded movable mold 63 is simultaneously demolded, the demolding times and steps are reduced, the inner and outer demolding are simultaneously performed, a part of overlapping time is increased, the demolding time is accelerated when demolding is performed, and the demolding efficiency is improved while the demolding effect is ensured.

In the embodiment, the pushing rod 22 pushes the pushing frame 6, so that the movable die frame 5 is moved, the movable die frame 5 is attached to the fixed die block 3, injection molding materials are pushed into the main runner 11 through the nozzle, the injection cavity 32 is filled with the injection molding materials through the injection channel 31, after injection molding is completed, the pushing frame 6 is pulled by the pushing rod 22, when the pushing frame 6 is pulled by the pushing rod 22 to perform demolding, the rotating block 61 rotates outside the thread auxiliary guide rod 41, and the hollow bearing seat 62 assists the rotating block 61 to rotate, so that the rotating block 61 drives the thread movable die block 63 to rotate, the demolding effect of the thread structure is achieved, and the inner demolding and the outer demolding are simultaneously performed.

All technical features in the embodiment can be freely combined according to actual needs.

The foregoing embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.

Claims (7)

1. The utility model provides an automatic demoulding structure for injection molding machine, its characterized in that includes fixed die seat (1) and installs mount pad (2) at the other end, fixed mounting has fixed module (3) on fixed die seat (1), mount pad (2) one side fixed mounting has positioning seat (4), run through on mount pad (2) four hydro-cylinders (21) of positioning seat (4) fixed mounting have, just hydro-cylinder (21) tip is equipped with push rod (22), push rod (22) tip fixed mounting has pushing frame (6), pushing frame (6) with install movable die carrier (5) between fixed die module (3) movable die carrier (5) with material piece (7) have been moulded plastics between fixed die module (3).

2. The automatic demolding structure for the injection molding machine, which is characterized in that a main runner (11) which is in butt joint with an injection nozzle is formed in the fixed mold seat (1), a corresponding injection channel (31) is formed in the fixed mold block (3) and located at the same position of the main runner (11), and an injection cavity (32) is formed in the fixed mold block (3).

3. The automatic demolding structure for injection molding machines according to claim 1, wherein a threaded auxiliary guide rod (41) is fixedly arranged on one side of the positioning seat (4) close to the pushing frame (6).

4. The automatic demolding structure for the injection molding machine, as set forth in claim 3, characterized in that a rotating block (61) is installed at the center of the pushing frame (6), a circle of the outer part of the rotating block (61) is rotatably installed with the pushing frame (6) through a hollow shaft bearing seat (62), and a threaded moving module (63) is fixedly installed at one end of the rotating block (61).

5. The automatic demolding structure for an injection molding machine according to claim 4, wherein the rotating block (61) is installed through the threaded auxiliary guide rod (41) in a threaded manner, and an auxiliary cavity (64) is formed in the threaded moving module (63).

6. The automatic demolding structure for the injection molding machine according to claim 1, wherein four groups of positioning rods (23) are fixedly arranged between the positioning seat (4) and the fixed mold seat (1), four groups of sliding blocks (51) are arranged outside the movable mold frame (5) in a circle, the sliding blocks (51) are slidably arranged on the positioning rods (23), and limiting blocks (24) are fixedly arranged on the positioning rods (23).

7. The automatic demolding structure for an injection molding machine according to claim 4, wherein a groove (52) is formed in the movable mold frame (5) and located on one side of the threaded movable mold block (63), and a threaded butt hole (53) is formed in the movable mold frame (5) in cooperation with the threaded movable mold block (63).