Exhaust system of injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold exhaust system which comprises a lower mold and an upper mold located at the upper end of the lower mold, a mold cavity is formed in the upper end face of the lower mold, an installation cavity is formed in the lower portion of the interior of the lower mold, and a fixing base is arranged in the installation cavity. A lifting plate is arranged above the fixed seat, a guide plate is fixedly connected to the lower end face of the lifting plate, a hydraulic cylinder is started to contract backwards, so that a movable column is driven to move rightwards, two guide rods on the outer wall of the movable column move along the interior of a strip-shaped hole, the guide rods move to the higher end of the strip-shaped hole, and therefore the guide plate and the lifting plate move downwards; and then the air extracting pump is started to exhaust air in the mold cavity and the mounting cavity, so that the air exhausting is convenient, the quality problem caused by poor air exhausting of a product is reduced, the effect of assisting in ejecting an injection molding part can be achieved, and the material taking is more convenient.

Description

Technical Field

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

[0002] Injection molds are tools used to produce plastic products and give them a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain complex-shaped parts. Specifically, it involves injecting heated, molten plastic into a mold cavity under high pressure using an injection molding machine. After cooling and solidification, the molded product is obtained.

[0003] However, during the injection molding process, since the interior of the injection mold is hollow, there will be some air inside the injection mold. When the melted raw material is poured into the injection mold, part of the air will be squeezed out into the molding cavity inside the injection mold, and a small part of the air will be wrapped by the melted raw material and cannot be discharged. During injection molding, the air wrapped by the raw material will form bubbles inside the molded object, affecting the injection molding quality of the injection mold. Utility Model Content

[0004] The purpose of the utility model is to provide an injection mold exhaust system, which has the characteristics of convenient exhaust, reducing product quality problems caused by poor exhaust, and can assist in ejecting injection molded parts, making material removal more convenient.

[0005] The top of the mould box is provided with an air filter, and the bottom of the mould box is provided with an air filter, and the bottom of the mould box is provided with an air filter.

[0006] In order to facilitate the movement of the lifting plate, as a preferred embodiment of the injection mold exhaust system of the present invention, the strip-shaped holes are arranged obliquely.

[0007] In order to limit the position of the lifting plate, as a preferred injection mold exhaust system of the present invention, two telescopic rods located on the left and right sides of the guide plate are fixedly connected between the lifting plate and the fixing seat.

[0008] In order to guide the lifting plate, as a preferred embodiment of the injection mold exhaust system of the present invention, the upper end surface of the fixing seat is penetrated by a guide groove that matches the guide plate.

[0009] In order to reduce the friction between the guide rod and the strip-shaped hole, as a preferred injection mold exhaust system of the present invention, the guide rod includes a fixed shaft, and the outer wall of the fixed shaft is rotatably connected to a rotating drum.

[0010] In order to fix and support the fixing seat, as a preferred injection mold exhaust system of the utility model, two pillars are fixedly connected between the fixing seat and the bottom end of the installation cavity.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] In the initial state, the two sealing columns are respectively located inside the two through holes, and the top of the sealing columns is flush with the bottom of the mold cavity. When exhaust is required, the hydraulic cylinder is started to retract backward, thereby driving the movable column to move to the right. The two guide rods on the outer wall of the movable column move along the inside of the strip hole, so that the guide rod moves to the higher end of the strip hole, thereby moving the guide plate and the lifting plate downward, thereby driving the two sealing columns to move out of the through hole, so that the through hole is in an open state. Subsequently, the vacuum pump is started to exhaust the air inside the mold cavity and the installation cavity, which facilitates exhaust and reduces product quality problems caused by poor exhaust.

[0013] When the molded part needs to be demoulded, the hydraulic cylinder is started again to drive the movable column to move to the left, thereby driving the lifting plate upward, so that the two sealing columns are lifted into the mold cavity, thereby assisting in ejecting the injection molded part and making material removal more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall cross-sectional structural diagram of the utility model;

[0015] Figure 2 This is a top view structural diagram of the fixing seat of the utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the guide rod of the utility model.

[0017] In the figure: 1. Lower mold; 2. Upper mold; 3. Mold cavity; 4. Mounting cavity; 5. Fixed seat; 6. Lifting plate; 7. Guide plate; 8. Strip hole; 9. Hydraulic cylinder; 10. Movable column; 11. Guide rod; 12. Through hole; 13. Sealing column; 14. Telescopic rod; 15. Guide groove; 16. Vacuum pump; 17. Vacuum pipe; 18. Fixed shaft; 19. Rotating drum; 20. Support. DETAILED DESCRIPTION

[0018] See also Figures 1 to 3 , an injection mold exhaust system, including a lower mold 1 and an upper mold 2 located at the upper end of the lower mold 1, the upper end surface of the lower mold 1 is provided with a mold cavity 3, the lower interior of the lower mold 1 is provided with a mounting cavity 4, a fixed seat 5 is provided inside the mounting cavity 4, a lifting plate 6 is provided above the fixed seat 5, the lower end surface of the lifting plate 6 is fixedly connected with a guide plate 7, the outer wall of the guide plate 7 is penetrated by two strip holes 8, a hydraulic cylinder 9 is installed on one side of the fixed seat 5, the output end of the hydraulic cylinder 9 is fixedly connected with a movable column 10, the outer wall of the movable column 10 is provided with two guide rods 11, the two guide rods 11 extend to the inside of the two strip holes 8 respectively, the bottom of the mold cavity 3 is provided with two through holes 12 communicating with the mounting cavity 4, the inside of the two through holes 12 are movably connected with sealing columns 13, the bottom ends of the two sealing columns 13 are fixedly connected to the lifting plate 6, an air pump 16 is installed on the outer wall of the lower mold 1, and an air extraction pipe 17 is connected between the air extraction pump 16 and the mounting cavity 4.

[0019] In this embodiment: in the initial state, as Figure 1 As shown, the two sealing columns 13 are respectively located inside the two through holes 12, and the top of the sealing column 13 is flush with the bottom of the mold cavity 3. When exhaust is required, the hydraulic cylinder 9 is started to retract backward, thereby driving the movable column 10 to move to the right, and the two guide rods 11 on the outer wall of the movable column 10 move along the inside of the strip hole 8, so that the guide rod 11 moves to the higher end of the strip hole 8, thereby causing the guide plate 7 and the lifting plate 6 to move downward, thereby driving the two sealing columns 13 to move out of the through holes 12, so that the through holes 12 are in an open state, and then the air pump 16 is started to exhaust the air inside the mold cavity 3 and the installation cavity 4, which makes exhaust convenient, thereby reducing the quality problems of the product caused by poor exhaust.

[0020] When the molded part needs to be demoulded, the hydraulic cylinder 9 is started again to drive the movable column 10 to move to the left, thereby driving the lifting plate 6 to move upward, so that the two sealing columns 13 are lifted into the mold cavity 3, thereby assisting in ejecting the molded part and making it more convenient to take out the material.

[0021] As a technical optimization solution of the present invention, the strip-shaped holes 8 are arranged obliquely.

[0022] In this embodiment, the strip-shaped hole 8 is arranged at an angle, so that when the guide rod 11 moves in the strip-shaped hole 8, the lifting plate 6 can move up and down.

[0023] As a technical optimization solution of the present invention, two telescopic rods 14 located on the left and right sides of the guide plate 7 are fixedly connected between the lifting plate 6 and the fixed seat 5 .

[0024] In this embodiment, the telescopic rod 14 is provided to limit the lifting plate 6 so that the lifting plate 6 can only move in the vertical direction.

[0025] As a technical optimization solution of the present invention, a guide groove 15 matching the guide plate 7 is formed through the upper end surface of the fixing seat 5 .

[0026] In this embodiment, a guide groove 15 matching the guide plate 7 is formed through the upper end surface of the fixing seat 5 , thereby guiding and limiting the guide plate 7 .

[0027] As a technical optimization solution of the present invention, the guide rod 11 includes a fixed shaft 18 , and the outer wall of the fixed shaft 18 is rotatably connected to a rotating drum 19 .

[0028] In this embodiment, the rotating drum 19 can rotate on the outer wall of the fixed shaft 18, so that when the guide rod 11 moves in the strip hole 8, the friction between the guide rod 11 and the strip hole 8 is reduced.

[0029] As a technical optimization solution of the present invention, two pillars 20 are fixedly connected between the fixing seat 5 and the bottom end of the installation cavity 4 .

[0030] In this embodiment, two pillars 20 are fixedly connected between the fixing base 5 and the bottom end of the installation cavity 4 to facilitate fixed support of the fixing base 5 .

[0031] Working principle: In the initial state, the two sealing columns 13 are respectively located inside the two through holes 12, and the top of the sealing column 13 is flush with the bottom of the mold cavity 3. When exhaust is required, the hydraulic cylinder 9 is started to retract backward, thereby driving the movable column 10 to move to the right, and the two guide rods 11 on the outer wall of the movable column 10 move along the inside of the strip hole 8, so that the guide rod 11 moves to the higher end of the strip hole 8, thereby causing the guide plate 7 and the lifting plate 6 to move downward, thereby driving the two sealing columns 13 to move out of the through hole 12, so that the through hole 12 is in an open state, and then the air pump 16 is started to exhaust the air inside the mold cavity 3 and the installation cavity 4, making exhaust convenient, thereby reducing product quality problems caused by poor exhaust;

[0032] When the molded part needs to be demoulded, the hydraulic cylinder 9 is started again to drive the movable column 10 to move to the left, thereby driving the lifting plate 6 to move upward, so that the two sealing columns 13 are lifted into the mold cavity 3, thereby assisting in ejecting the molded part and making it more convenient to take out the material.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An injection mold exhaust system, comprising a lower mold (1) and an upper mold (2) located above the lower mold (1), characterized in that: The upper end surface of the lower mold (1) is provided with a mold cavity (3), the lower interior of the lower mold (1) is provided with an installation cavity (4), the interior of the installation cavity (4) is provided with a fixed seat (5), the upper part of the fixed seat (5) is provided with a lifting plate (6), the lower end surface of the lifting plate (6) is fixedly connected with a guide plate (7), the outer wall of the guide plate (7) is provided with two strip holes (8), a hydraulic cylinder (9) is installed on one side of the fixed seat (5), the output end of the hydraulic cylinder (9) is fixedly connected with a movable column (10), the movable The outer wall of the movable column (10) is provided with two guide rods (11), and the two guide rods (11) extend to the inside of the two strip holes (8) respectively. The bottom of the mold cavity (3) is provided with two through holes (12) connected to the installation cavity (4). The inside of the two through holes (12) is movably connected with a sealing column (13), and the bottom ends of the two sealing columns (13) are fixedly connected to the lifting plate (6). The outer wall of the lower mold (1) is installed with an air pump (16), and an air extraction pipe (17) is connected between the air pump (16) and the installation cavity (4).

2. The injection mold exhaust system according to claim 1, characterized in that: The strip-shaped holes (8) are arranged obliquely.

3. The injection mold exhaust system according to claim 1, characterized in that: Two telescopic rods (14) are fixedly connected between the lifting plate (6) and the fixing seat (5) and are located on the left and right sides of the guide plate (7).

4. The injection mold exhaust system according to claim 1, characterized in that: A guide groove (15) matching the guide plate (7) is formed through the upper end surface of the fixing seat (5).

5. The injection mold exhaust system according to claim 1, characterized in that: The guide rod (11) comprises a fixed shaft (18), and the outer wall of the fixed shaft (18) is rotatably connected to a rotating drum (19).

6. The injection mold exhaust system according to claim 1, characterized in that: Two pillars (20) are fixedly connected between the fixing seat (5) and the bottom end of the installation cavity (4).

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