A dual color injection molding cavity gap adjustment mechanism

Abstract

The utility model relates to adjusting mechanism technical field, especially a kind of double-color injection mould cavity gap adjusting mechanism, including base, the top surface of the base is fixedly connected with lower mould main body, the top surface of the lower mould main body is inserted with several symmetrically arranged guide rods.The utility model has the advantages that the gas pressure inside air passage can be increased with the injection of gas, and then the expansion strip can be expanded outward until the expansion strip is tightly attached to the adjusting plate, the gap between the adjusting plate and the mold cavity can be plugged, the air tightness between the adjusting plate and the mold cavity is greatly improved, then the mold cavity is injection molded through the flow channel above the adjusting plate, and when the material cools down, the electric push rod is opened to drive the adjusting plate to move downward, then the mold cavity is injection molded through the flow channel below the adjusting plate, the double-color injection molding operation can be completed, and the expansion of the expansion strip greatly improves the air tightness between the adjusting plate and the mold cavity, preventing the injection liquid from leaking.

Description

Technical Field

[0001] This utility model relates to the field of adjustment mechanism technology, and in particular to a two-color injection mold cavity gap adjustment mechanism. Background Technology

[0002] Two-color injection molding cavity clearance adjustment mechanisms, as an advanced mold design technology, are widely used in the molding and processing of plastic products. Their core lies in the precise control of the clearance between the two mold cavities through a sophisticated adjustment mechanism. This clearance plays a crucial role in the two-color injection molding process, directly determining the flow pattern, bonding quality, and final product appearance and performance of the two plastic materials within the mold. Specifically, a two-color injection molding cavity clearance adjustment mechanism typically consists of a movable adjustment plate, a precision transmission device, and a locking mechanism. During the injection molding process, the adjustment plate slides within the mold cavity according to preset parameters, thereby adjusting the clearance between the two cavities.

[0003] Although two-color injection mold cavity clearance adjustment mechanisms play a crucial role in the molding and processing of plastic products, existing technologies still have some problems that urgently need to be addressed. In particular, the gap between the adjustment plate and the mold cavity remains a significant issue. Because the adjustment plate slides inside the mold cavity, the gap is prone to widening due to wear after prolonged use, leading to leakage of the injection molding liquid. This not only wastes raw materials but also affects the molding quality and production efficiency. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a two-color injection mold cavity gap adjustment mechanism to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of this utility model provides a two-color injection mold cavity clearance adjustment mechanism, including a base. A lower mold body is fixedly connected to the top surface of the base. A plurality of symmetrically arranged pins are inserted into the top surface of the lower mold body. An upper mold body is fixedly connected to the top surface of the plurality of pins. The bottom surface of the upper mold body is in contact with the top surface of the lower mold body. A mold cavity is formed on the top surface of the lower mold body. An adjusting plate is slidably connected to the inner wall of the mold cavity. The adjusting plate is parallel to the upper mold body. An electric pusher is fixedly connected to the bottom surface of the lower mold body. The electric push rod has its output end fixedly connected to the adjusting plate. An air passage is provided on the inner wall of the lower mold body. An expansion strip is fixedly connected to the inner wall of the air passage. The inner wall of the expansion strip is in contact with the outer surface of the adjusting plate. An air inlet pipe is fixedly connected to the side of the lower mold body. The output end of the air inlet pipe is connected to the air passage. A threaded sleeve is fixedly connected to the side of the lower mold body near the air inlet pipe. An adapter pipe is threadedly connected to the inner wall of the threaded sleeve. The adapter pipe is slidably connected to the air inlet pipe on the side of the lower mold body near the adapter pipe. A dustproof net is fixedly connected to the inner wall of the adapter pipe.

[0007] Preferably, in any of the above solutions, the bottom surface of the adjusting plate is fixedly connected to two symmetrically arranged guide rods, both of which are slidably connected to the lower mold body, and the electric push rod is located between the two guide rods.

[0008] Preferably, one side of the adapter pipe is fixedly connected to a sealing ring, the side of the lower mold body is provided with a sealing groove, and the sealing ring push rod sealing groove is slidably connected to the lower mold body.

[0009] Preferably, in any of the above solutions, the bottom surface of the lower mold body has two symmetrically arranged ventilation holes, both of which are connected to the mold cavity.

[0010] Preferably, of any of the above solutions, the number of dustproof nets is two, and both dustproof nets correspond to the air intake pipe.

[0011] Preferably, the expansion strip is made of ceramic fiber reinforced elastomer, as described in any of the above embodiments.

[0012] Preferably, in any of the above embodiments, the top surface of the lower mold body has two symmetrically arranged flow channels, both of which are connected to the mold cavity, and the adjusting plate is located between the two flow channels.

[0013] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0014] When performing two-color injection molding, the operator can fix the mold in the usage position, activate the electric push rod to move the adjusting plate inside the mold cavity until the adjusting plate aligns with the expansion strip. Then, an external air pump blows air into the air passage through the air inlet pipe. As the air flows through the adapter pipe and passes through the dust filter, it blocks dust in the airflow, preventing it from entering the air passage. The injection of air increases the air pressure inside the air passage, causing the expansion strip to expand outward until it is tightly against the adjusting plate, sealing the gap between the adjusting plate and the mold cavity. This greatly improves the airtightness between the adjusting plate and the mold cavity. Subsequently, the material is injected into the mold cavity through the flow channel above the adjusting plate. After the material cools, the electric push rod is activated to move the adjusting plate downward, and the material is injected into the mold cavity through the flow channel below the adjusting plate. This completes the two-color injection molding operation. Moreover, the expansion and sealing of the expansion strip greatly improves the airtightness between the adjusting plate and the mold cavity, preventing leakage of the injection liquid. Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the assembly of this utility model;

[0016] Figure 2 This is a second-view structural diagram of the assembly of this utility model;

[0017] Figure 3 This is an exploded structural diagram of the assembly of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the lower mold body of this utility model;

[0019] Figure 5 This is a cross-sectional structural diagram of the lower mold body of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the transfer tube of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure at point A of this utility model.

[0022] In the diagram: 1-base, 2-lower mold body, 3-pin, 4-upper mold body, 5-mold cavity, 6-adjusting plate, 7-electric push rod, 8-air passage, 9-expansion strip, 10-air inlet pipe, 11-threaded sleeve, 12-adapter pipe, 13-dustproof net, 14-guide rod, 15-sealing ring, 16-sealing groove, 17-ventilation hole, 18-flow channel. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0024] like Figures 1 to 7 As shown, a two-color injection mold cavity clearance adjustment mechanism includes a base 1. A lower mold body 2 is fixedly connected to the top surface of the base 1. Several symmetrically arranged pins 3 are inserted into the top surface of the lower mold body 2. An upper mold body 4 is fixedly connected to the top surface of the pins 3. The bottom surface of the upper mold body 4 is in contact with the top surface of the lower mold body 2. A mold cavity 5 is opened on the top surface of the lower mold body 2. An adjusting plate 6 is slidably connected to the inner wall of the mold cavity 5. The adjusting plate 6 is parallel to the upper mold body 4. An electric push rod 7 is fixedly connected to the bottom surface of the lower mold body 2. The output end of the electric push rod 7 is connected to the adjusting plate. 6. Fixed connection: An air passage 8 is opened on the inner wall of the lower mold body 2. An expansion strip 9 is fixedly connected to the inner wall of the air passage 8. The inner wall of the expansion strip 9 is in contact with the outer surface of the adjustment plate 6. An air inlet pipe 10 is fixedly connected to the side of the lower mold body 2. The output end of the air inlet pipe 10 is connected to the air passage 8. A threaded sleeve 11 is fixedly connected to the side of the lower mold body 2 near the air inlet pipe 10. An adapter pipe 12 is threadedly connected to the inner wall of the threaded sleeve 11. The adapter pipe 12 is slidably connected to the air inlet pipe 10 on the side of the lower mold body 2 near the lower mold body 2. A dustproof net 13 is fixedly connected to the inner wall of the adapter pipe 12.

[0025] As an optional technical solution of this utility model, the bottom surface of the adjusting plate 6 is fixedly connected to two symmetrically arranged guide rods 14. Both guide rods 14 are slidably connected to the lower mold body 2. The electric push rod 7 is located between the two guide rods 14. The symmetrical arrangement of the guide rods 14 allows the adjusting plate 6 to slide smoothly on the lower mold body 2, ensuring the movement accuracy and stability of the adjusting plate 6. The electric push rod 7, located between the two guide rods 14, further enhances the force balance of the adjusting plate 6 and prevents it from shifting or jamming.

[0026] As an optional technical solution of this utility model, a sealing ring 15 is fixedly connected to one side of the adapter pipe 12, and a sealing groove 16 is provided on the side of the lower mold body 2. The sealing ring 15 pushes the sealing groove 16 and slides with the lower mold body 2. The sealing ring 15 is slidably connected to the lower mold body 2 through the sealing groove 16, ensuring the sealing between the adapter pipe 12 and the lower mold body 2 and preventing gas or liquid leakage. This design improves the sealing performance of the mechanism and ensures the stability of the injection molding process and product quality.

[0027] As an optional technical solution of this utility model, two symmetrically arranged ventilation holes 17 are provided through the bottom surface of the lower mold body 2. Both ventilation holes 17 are connected to the mold cavity 5. The symmetrical arrangement of the ventilation holes 17 and their connection to the mold cavity 5 can effectively regulate the air pressure in the mold cavity 5 and prevent injection molding defects caused by uneven air pressure. This design improves the quality and consistency of injection molding.

[0028] As an optional technical solution of this utility model, there are two dustproof nets 13, each corresponding to the air inlet pipe 10. The correspondence between the dustproof nets 13 and the air inlet pipe 10 can effectively prevent dust and impurities from entering the mold cavity 5, ensuring the purity of the injection molding material. This design improves the surface quality and internal performance of the injection molded product.

[0029] As an optional technical solution of this utility model, the expansion strip 9 is made of ceramic fiber reinforced elastomer. The expansion strip 9, made of ceramic fiber reinforced elastomer, has good high-temperature resistance and elasticity, and can effectively adapt to temperature changes and pressure fluctuations during injection molding, preventing deformation or damage to the mold cavity 5. This design improves the durability and stability of the mechanism.

[0030] As an optional technical solution of this utility model, the top surface of the lower mold body 2 has two symmetrically arranged flow channels 18, both of which are connected to the mold cavity 5. An adjusting plate 6 is located between the two flow channels 18. The symmetrical arrangement of the flow channels 18 and their connection to the mold cavity 5 ensures that the injection material flows evenly into the mold cavity 5, avoiding injection defects caused by uneven material distribution. The adjusting plate 6, located between the two flow channels 18, further optimizes the uniformity of material flow.

[0031] A two-color injection mold cavity clearance adjustment mechanism, the working principle of which is as follows:

[0032] 1) When two-color injection molding is required, the operator can fix the mold in the position of use, turn on the electric push rod 7 to drive the adjusting plate 6 to move inside the mold cavity 5 until the adjusting plate 6 corresponds to the expansion strip 9.

[0033] 2): An external air pump blows air into the air passage 8 through the air inlet pipe 10. When the air flows through the adapter pipe 12 and passes through the dustproof net 13, it can block the dust in the airflow and prevent the dust in the airflow from entering the air passage 8.

[0034] 3): As gas is injected, the air pressure inside the air passage 8 increases, which in turn causes the expansion strip 9 to expand outward until the expansion strip 9 is tightly attached to the adjusting plate 6. This seals the gap between the adjusting plate 6 and the mold cavity 5, greatly improving the airtightness between the adjusting plate 6 and the mold cavity 5.

[0035] In summary, this two-color injection molding cavity clearance adjustment mechanism allows the operator to fix the mold in the desired position and activate the electric push rod 7 to move the adjusting plate 6 inside the mold cavity 5 until the adjusting plate 6 aligns with the expansion bar 9. Then, an external air pump blows air into the air passage 8 through the air inlet pipe 10. As the gas flows through the adapter pipe 12 and passes through the dustproof net 13, dust in the airflow is blocked, preventing it from entering the air passage 8. The injection of gas increases the air pressure inside the air passage 8, thereby allowing the expansion bar to expand. The expansion bar 9 expands outward until it is tightly attached to the adjusting plate 6, which seals the gap between the adjusting plate 6 and the mold cavity 5, greatly improving the airtightness between the adjusting plate 6 and the mold cavity 5. Then, the material is injected into the mold cavity 5 through the flow channel 18 above the adjusting plate 6. After the material cools down, the electric push rod 7 is activated to drive the adjusting plate 6 to move downward. Then, the material is injected into the mold cavity 5 through the flow channel 18 below the adjusting plate 6. This can complete the two-color injection molding operation. Moreover, the expansion and sealing of the expansion bar 9 greatly improves the airtightness between the adjusting plate 5 and the mold cavity 5, preventing leakage of the injection liquid.

Claims

1. A two-color injection mold cavity clearance adjustment mechanism, characterized in that: The system includes a base (1), a lower mold body (2) fixedly connected to the top surface of the base (1), a plurality of symmetrically arranged pins (3) inserted into the top surface of the lower mold body (2), an upper mold body (4) fixedly connected to the top surface of the plurality of pins (3), the bottom surface of the upper mold body (4) fitting against the top surface of the lower mold body (2), a mold cavity (5) opened on the top surface of the lower mold body (2), an adjusting plate (6) slidably connected to the inner wall of the mold cavity (5), the adjusting plate (6) being parallel to the upper mold body (4), an electric push rod (7) fixedly connected to the bottom surface of the lower mold body (2), the output end of the electric push rod (7) being fixedly connected to the adjusting plate (6), and the lower mold body... An air passage (8) is provided on the inner wall of the main body (2). An expansion strip (9) is fixedly connected to the inner wall of the air passage (8). The inner wall of the expansion strip (9) is in contact with the outer surface of the adjustment plate (6). An air inlet pipe (10) is fixedly connected to the side of the lower mold main body (2). The output end of the air inlet pipe (10) is connected to the air passage (8). A threaded sleeve (11) is fixedly connected to the side of the lower mold main body (2) near the air inlet pipe (10). A connecting pipe (12) is threadedly connected to the inner wall of the threaded sleeve (11). The connecting pipe (12) is slidably connected to the air inlet pipe (10) on the side of the lower mold main body (2). A dustproof net (13) is fixedly connected to the inner wall of the connecting pipe (12).

2. The two-color injection mold cavity gap adjustment mechanism according to claim 1, characterized in that: The bottom surface of the adjustment plate (6) is fixedly connected to two symmetrically arranged guide rods (14), both of which are slidably connected to the lower mold body (2), and the electric push rod (7) is located between the two guide rods (14).

3. The two-color injection mold cavity gap adjustment mechanism according to claim 2, characterized in that: A sealing ring (15) is fixedly connected to one side of the adapter pipe (12), and a sealing groove (16) is provided on the side of the lower mold body (2). The sealing ring (15) pushes the sealing groove (16) and slides with the lower mold body (2).

4. The two-color injection mold cavity gap adjustment mechanism according to claim 3, characterized in that: The bottom surface of the lower mold body (2) has two symmetrically arranged ventilation holes (17), and both ventilation holes (17) are connected to the mold cavity (5).

5. The two-color injection mold cavity gap adjustment mechanism according to claim 4, characterized in that: There are two dustproof nets (13), and both dustproof nets (13) correspond to the air inlet pipe (10).

6. The two-color injection mold cavity clearance adjustment mechanism according to claim 5, characterized in that: The expansion strip (9) is made of ceramic fiber reinforced elastomer.

7. The two-color injection mold cavity gap adjustment mechanism according to claim 6, characterized in that: The top surface of the lower mold body (2) has two symmetrically arranged flow channels (18), both of which are connected to the mold cavity (5), and the adjustment plate (6) is located between the two flow channels (18).

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