Exhaust structure of injection mold

Abstract

The exhaust structure comprises a first mold box, a second mold box, a second reset spring and a sliding groove, the second mold box is installed below the first mold box in a clamped mode, a filling port is fixedly installed on the first mold box, a movable block is installed in the first mold box in a sliding mode, and the movable block is connected with the second reset spring. A first reset spring is fixedly mounted on the movable block, a limiting block is fixedly mounted in the first mold box, a filter screen is fixedly mounted in the first mold box, a cleaning block is slidably mounted in the filter screen, and a pull rope is fixedly connected to the cleaning block. According to the exhaust structure of the injection mold, the abutting rod is arranged, when the expansion air bag expands, the pushing and closing block under the expansion air bag is pushed to move downwards along with the abutting rod, at the moment, the pushing and closing block and the abutting rod move downwards in the sliding groove, and the abutting rod abuts against the second mold box through the protruding block at the bottom of the first mold box; and the effect of assisting rapid separation of the first mold box and the second mold box of the injection mold is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an exhaust structure of an injection mold. Background Art

[0002] With the continuous progress and development of society, various products made of plastics are getting closer to people's lives. People use a lot of plastic products in their daily lives. Generally, plastic products are shaped by injection molds. In the process of plastic injection, some gases such as air will be generated inside the injection mold. If these gases are not discharged in time, it is easy to affect the quality of the finished product;

[0003] For example, an exhaust structure of an injection mold with the utility model application number CN202220861712.2 relates to the technical field of injection molds, including an upper mold, a lower mold, and an exhaust mechanism. The utility model sets an exhaust mechanism, which can prevent dust from clogging the exhaust hole. The air pressure generated during injection molding inside the mold causes the movable slide to slide to the outer wall of one side of the mold through a rubber sealing ring, and pushes the limit rod and the limit baffle to drive the linkage rotating plate to move. At the same time, the limit rotating rod, driven by the linkage rotating plate, drives the sliding baffle to squeeze the first spring. When the exhaust hole on the movable slide is separated from the interior of the mold, the mold is exhausted to the outside through the exhaust hole and the gas conveying groove. When the gas is gradually discharged, the first spring pushes the sliding baffle through rebound, so that the limit rotating rod drives the linkage rotating plate to push the movable slide to automatically reset, thereby preventing the exhaust hole from being blocked by external dust.

[0004] The exhaust structure of the injection mold in the above document only has the function of blocking external dust from entering the injection mold and quickly installing and replacing the movable slide. In addition, the injection mold box is divided into two groups, the upper and lower groups, and the injection mold box cannot be quickly separated.

[0005] The exhaust structure of the injection mold in the above document cannot quickly separate the injection mold box, nor can it automatically clean the filter screen;

[0006] Therefore, we propose an exhaust structure for an injection mold to solve the above-mentioned problems. Utility Model Content

[0007] The utility model aims to provide an exhaust structure for an injection mold to solve the problem that the exhaust structure for an injection mold proposed in the above background technology cannot quickly separate the injection mold box and cannot automatically clean the filter screen.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an exhaust structure of an injection mold, comprising a first mold box, a second mold box, a second return spring and a slide groove, the second mold box is clamped and installed below the first mold box, and the filling port is fixedly installed on the first mold box, a movable block is slidably installed inside the first mold box, and the first return spring is fixedly installed on the movable block, a limit block is fixedly installed inside the first mold box, a filter is fixedly installed inside the first mold box, and a cleaning block is slidably installed inside the filter, and a pull rope is fixedly connected to the cleaning block, a guide wheel and a torsion spring are fixedly installed inside the first mold box, an air outlet pipe is fixedly installed inside the first mold box, and an expansion airbag is fixedly connected to the air outlet pipe, a resistance rod is slidably installed inside the first mold box, and a pushing block is fixedly installed on the top of the resistance rod, a slide groove is opened inside the first mold box, and a second return spring is fixedly installed inside the first mold box.

[0009] Furthermore, the resistance rod forms an elastic structure with the first mold box through a second return spring, and a clamping block is provided on the resistance rod, and the second return spring is fixedly installed on the clamping block. Through the above structure, the resistance rod can move upward and close to the first mold box without external interference.

[0010] Furthermore, the push block and the resistance rod form a sliding structure with the first mold box through the expansion airbag, and the push block and the resistance rod are arranged in the slide groove. Through the above structure, the resistance rod can slide in the slide groove.

[0011] Furthermore, a protruding block is provided at the bottom of the first mold box, and a recessed groove is provided at the top of the second mold box, and the bottom of the first mold box is tightly connected to the top of the second mold box. Through the above structure, the first mold box can be tightly engaged with the second mold box.

[0012] Furthermore, the movable block forms an elastic structure with the first mold box through the first return spring, and a pull rope is fixedly connected to the movable block. Through the above structure, the movable block can remain in a stationary state with the first mold box without interference from external factors.

[0013] Furthermore, the cleaning block forms a sliding structure with the filter net through a pull rope, and the cleaning block forms a traction structure with the movable block through the pull rope. Through the above structure, the pull rope can be pulled, and through the above structure, when the movable block moves, the cleaning block also moves synchronously in the filter net.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The exhaust structure of the injection mold is provided with a resistance rod. When the inflatable airbag is inflated, it pushes the push block directly below it to move downward together with the resistance rod. At this time, the push block and the resistance rod move downward in the slide groove, and the resistance rod pushes the second mold box open through the protruding block position at the bottom of the first mold box, thereby assisting in the rapid separation of the first mold box and the second mold box of the injection mold;

[0016] 2. The exhaust structure of the injection mold is provided with a cleaning block. When the movable block moves upward, the pull rope is in a relaxed state. At this time, under the action of the torsion spring, the torsion spring pulls the cleaning block to move downward in the filter. When the movable block is reset under the action of the first reset spring, the movable block will pull the cleaning block upward through the pull rope, thereby achieving the effect of self-cleaning the filter during the exhaust process of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the side structure of the expansion airbag of the utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure of the resistance rod of the utility model;

[0021] Figure 5 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1. first mold box; 2. second mold box; 3. filling port; 4. movable block; 5. first return spring; 6. pull rope; 7. limit block; 8. filter screen; 9. cleaning block; 10. guide wheel; 11. torsion spring; 12. air outlet pipe; 13. expansion airbag; 14. push block; 15. resistance rod; 16. second return spring; 17. slide groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5The utility model provides a technical solution: an exhaust structure of an injection mold, comprising a first mold box 1, a second mold box 2, a filling port 3, a movable block 4, a first return spring 5, a pull rope 6, a limit block 7, a filter screen 8, a cleaning block 9, a guide wheel 10, a torsion spring 11, an exhaust pipe 12, an expansion airbag 13, a push block 14, a resistance rod 15, a second return spring 16 and a slide groove 17.

[0025] The second mold box 2 is installed in engagement with the lower part of the first mold box 1, and the filling port 3 is fixedly installed on the first mold box 1, the movable block 4 is slidably installed inside the first mold box 1, and the first return spring 5 is fixedly installed on the movable block 4, the limit block 7 is fixedly installed inside the first mold box 1, the filter screen 8 is fixedly installed inside the first mold box 1, and the cleaning block 9 is slidably installed inside the filter screen 8, and the cleaning block 9 is fixedly connected to the pull rope 6, the guide wheel 10 and the torsion spring 11 are fixedly installed inside the first mold box 1, the air outlet pipe 12 is fixedly installed inside the first mold box 1, and the air outlet pipe 12 is fixedly connected to the expansion airbag 13, the resistance rod 15 is slidably installed inside the first mold box 1, and the push block 14 is fixedly installed on the top of the resistance rod 15, the first mold box 1 is provided with a slide groove 17, and the second return spring 16 is fixedly installed inside the first mold box 1.

[0026] The resisting rod 15 forms an elastic structure with the first mold box 1 through the second return spring 16, and a clamping block is provided on the resisting rod 15, and the second return spring 16 is fixedly installed on the clamping block, the pushing block 14 and the resisting rod 15 form a sliding structure with the first mold box 1 through the expansion airbag 13, and the pushing block 14 and the resisting rod 15 are arranged in the slide groove 17, the bottom of the first mold box 1 is provided with a protruding block, and the top of the second mold box 2 is provided with a concave groove, and the bottom of the first mold box 1 is closely connected with the top of the second mold box 2;

[0027] The movable block 4 forms an elastic structure with the first mold box 1 through the first return spring 5, and a pull rope 6 is fixedly connected to the movable block 4. The cleaning block 9 forms a sliding structure with the filter screen 8 through the pull rope 6, and the cleaning block 9 forms a traction structure with the movable block 4 through the pull rope 6.

[0028] When using the injection mold, first close the first mold box 1 and the second mold box 2, and then pour materials into the first mold box 1 and the second mold box 2 through the filling port 3. When the air inside the first mold box 1 and the second mold box 2 is continuously compressed during the injection molding process, the movable block 4 will be subjected to the internal air pressure and the extrusion force will be continuously increased. The movable block 4 will move upward to fit the limit block 7. The gas inside the injection mold will be filtered by the filter screen 8 and pass through the outlet pipe 12 to heat and pressurize the expansion airbag 13. When the expansion airbag 13 expands, it will push it The push-fit block 14 directly below moves downward together with the resistance rod 15. At this time, the push-fit block 14 and the resistance rod 15 move downward in the slide groove 17. The resistance rod 15 pushes the second mold box 2 open through the protruding block at the bottom of the first mold box 1. The gas inside the injection mold is discharged through the expansion airbag 13 and the push-fit block 14 and the pipeline inside the resistance rod 15 (before the resistance rod 15 extends out of the first mold box 1, the pipeline outlet inside the resistance rod 15 is blocked by the inner wall of the first mold box 1), thereby assisting in the rapid separation of the first mold box and the second mold box of the injection mold.

[0029] When the movable block 4 moves upward, the pull rope 6 is in a relaxed state. At this time, under the action of the torsion spring 11, the torsion spring 11 pulls the cleaning block 9 to move downward in the filter 8. When the movable block 4 is reset under the action of the first reset spring 5, the movable block 4 will pull the cleaning block 9 upward through the pull rope 6, thereby achieving the effect of self-cleaning the filter 8 in the exhaust of the injection mold;

[0030] When there is no pressure inside the injection mold, the movable block 4 is reset under the action of the first reset spring 5 , and the abutment rod 15 is reset under the action of the second reset spring 16 .

[0031] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold exhaust structure, comprising a first mold box (1), a second mold box (2), a second return spring (16) and a slide groove (17), characterized in that: The second mold box (2) is mounted on the lower side of the first mold box (1), and a filling port (3) is fixedly mounted on the first mold box (1). A movable block (4) is slidably mounted inside the first mold box (1), and a first return spring (5) is fixedly mounted on the movable block (4). A limit block (7) is fixedly mounted inside the first mold box (1). A filter screen (8) is fixedly mounted inside the first mold box (1), and a cleaning block (9) is slidably mounted inside the filter screen (8), and a pull rope (6) is fixedly connected to the cleaning block (9). ), a guide wheel (10) and a torsion spring (11) are fixedly installed inside the first mold box (1), an air outlet pipe (12) is fixedly installed inside the first mold box (1), and an expansion air bag (13) is fixedly connected to the air outlet pipe (12), a resistance rod (15) is slidably installed inside the first mold box (1), and a push block (14) is fixedly installed on the top of the resistance rod (15), a sliding groove (17) is provided inside the first mold box (1), and a second return spring (16) is fixedly installed inside the first mold box (1).

2. The exhaust structure of an injection mold according to claim 1, characterized in that: The resisting rod (15) forms an elastic structure with the first mold box (1) through the second return spring (16), and a clamping block is arranged on the resisting rod (15), and the second return spring (16) is fixedly mounted on the clamping block.

3. The exhaust structure of an injection mold according to claim 1, characterized in that: The pushing block (14) and the resisting rod (15) form a sliding structure with the first mold box (1) through the expansion air bag (13), and the pushing block (14) and the resisting rod (15) are arranged in the sliding groove (17).

4. The exhaust structure of an injection mold according to claim 1, characterized in that: The bottom of the first mold box (1) is provided with a protruding block, and the top of the second mold box (2) is provided with a recessed groove, and the bottom of the first mold box (1) is tightly butted against the top of the second mold box (2).

5. The exhaust structure of an injection mold according to claim 1, characterized in that: The movable block (4) forms an elastic structure with the first mold box (1) via a first return spring (5), and a pull rope (6) is fixedly connected to the movable block (4).

6. The exhaust structure of an injection mold according to claim 1, characterized in that: The cleaning block (9) forms a sliding structure with the filter screen (8) via the pull rope (6), and the cleaning block (9) forms a traction structure with the movable block (4) via the pull rope (6).

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