Injection mold for bipolar contact pin

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold for a bipolar pin, which comprises an upper frame and a lower frame, four corners of the bottom end of the upper frame are fixedly connected with sliding rods respectively, the other ends of the four sliding rods are correspondingly and fixedly connected with four corners of the top end of the lower frame respectively, and the top end of the upper frame is fixedly connected with a first cylinder. The output end of the first air cylinder penetrates through the upper frame and is slidably connected with the upper frame, the output end of the first air cylinder is fixedly connected with a connecting block, the bottom end of the connecting block is fixedly connected with an upper mold, the four corners of the upper mold are slidably connected to the outer sides of the four sliding rods in a sleeving mode, a lower mold is arranged at the top end of the lower frame, and the four corners of the lower mold are connected to the outer sides of the four sliding rods in a sleeving mode. A moving groove is formed in the top end of the lower frame, a demolding assembly is arranged in the moving groove, a second air cylinder is controlled to drive a moving block to slide upwards on a moving rod, the moving block drives an ejector pin to synchronously move upwards, and the ejector pin accurately and evenly ejects out a bipolar pin product in a mold.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and specifically, to an injection mold for bipolar pins. Background Art

[0002] Bipolar pins are mainly used in the fields of electronic testing and connection. During the testing process of a printed circuit board (PCB), bipolar pins are used to connect test equipment to test points on the circuit board for measuring parameters such as current, voltage, and resistance and troubleshooting. Bipolar pins can be produced using injection molds during the production process. The bipolar pin forming mold is a special mold for producing bipolar pins, and the design of this mold is to ensure that bipolar pins can achieve precise shapes, dimensions, and polarity layouts during the manufacturing process.

[0003] There are some drawbacks in the existing devices during use. For example, after the bipolar pin injection mold is shaped, the bipolar pin products are prone to sticking in the mold cavity, and it is not easy to take out the bipolar pin products sticking in the mold cavity. The sticking of bipolar pin products in the mold cavity makes it difficult to take out. When trying to take out the sticking bipolar pin products, the operator may use improper force or method, resulting in damage or deformation of the bipolar pin products, increasing the defective rate of bipolar pin products and thus reducing the overall production efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold for bipolar pins to solve the problem that the bipolar pin injection mold cannot be automatically demolded.

[0005] The utility model provides the following technical solution: an injection mold for bipolar pins, including an upper frame and a lower frame. Four corners at the bottom end of the upper frame are respectively fixedly connected with sliding rods, and the other ends of the four sliding rods are respectively fixedly connected to the four corners at the top end of the lower frame. A first cylinder is fixedly connected to the top end of the upper frame. The output end of the first cylinder penetrates through the upper frame and is slidably connected to the upper frame. The output end of the first cylinder is fixedly connected with a connecting block, and a upper mold is fixedly connected to the bottom end of the connecting block. Four corners of the upper mold are slidably sleeved outside the four sliding rods. A lower mold is arranged at the top end of the lower frame, and four corners of the lower mold are sleeved outside the four sliding rods. A moving groove is opened at the top end of the lower frame, and a demolding component is arranged in the moving groove.

[0006] In the above scheme, the sliding rods are fixedly connected at the four corners of the upper frame and the lower frame to ensure the stable movement of the upper mold in the vertical direction. This design avoids the deviation or shaking of the mold during the mold closing or demolding process, thereby improving the stability of the mold and the accuracy of product molding. The design of the first cylinder makes the opening and closing operation of the mold simpler and more automated. By controlling the extension and contraction of the first cylinder, the upper and lower molds can be easily opened and closed quickly, reducing the need for manual operation and improving production efficiency. The demolding assembly arranged in the movable groove can ensure that the product is quickly and completely ejected from the mold during the demolding process, which not only improves the demolding efficiency, but also helps to protect the mold and product from damage.

[0007] As a preferred embodiment of the above technical solution, a material guide hole is opened at the center of the upper mold, an upper material guide cavity is opened between the four mold cavities of the upper mold, the upper material guide cavity connects the four mold cavities of the upper mold, the material guide hole is connected to the upper material guide cavity, a lower material guide cavity is opened between the four mold cavities of the lower mold, and the lower material guide cavity connects the four mold cavities of the lower mold.

[0008] In the above scheme, by setting up upper and lower material guide cavities, and these cavities are connected with the mold cavity and the material guide holes, it can be ensured that the molten material flows more smoothly in the mold, which avoids the problems of blockage or poor flow that may occur during the injection or molding process, thereby improving production efficiency.

[0009] As a preferred embodiment of the above technical solution, a first cooling groove is opened inside the upper mold, and both ends of the first cooling groove are opened on one side of the outer wall of the upper mold; a second cooling groove is opened inside the lower mold, and both ends of the second cooling groove are opened on one side of the outer wall of the lower mold.

[0010] In the above scheme, the design of the cooling tank allows the cooling medium (such as coolant or cooling water) to flow inside the mold, thereby reducing the temperature of the mold more evenly, so that the cooling time of the plastic part in the mold can be shortened, thereby shortening the entire production cycle.

[0011] As a preferred embodiment of the above technical solution, the demolding assembly includes a moving rod fixedly connected to the four corners of the inner bottom wall of the moving groove, the four moving rods are fixedly connected to the bottom end of the lower mold at one end away from the inner bottom wall, the four moving rods are slidably sleeved on the outer sides with a moving block, the top of the moving block is fixedly connected to a plurality of ejector pins, the plurality of ejector pins vertically penetrate the lower mold and are slidably connected to the lower mold, the tops of the plurality of ejector pins are respectively flush with the corresponding lower material guiding channels, the bottom end of the lower frame is fixedly connected to a second cylinder, the output end of the second cylinder penetrates the lower frame and is slidably connected to the lower frame, and the output end of the second cylinder is fixedly connected to the bottom end of the moving block.

[0012] In the above solution, the second cylinder drives the moving block to slide on the moving rod, thereby driving the multiple ejector pins to move synchronously, making the demolding process faster and more efficient. Due to the design that the top of the ejector pin is flush with the corresponding lower material guiding cavity and the four mold cavities, the ejector pin can accurately and evenly eject the product in the mold, avoiding product deformation or damage caused by uneven demolding, thus ensuring the demolding quality.

[0013] As an optimization of the above technical solution, springs are respectively arranged on the outer sides of the four moving rods, and both ends of the four springs are fixedly connected to the bottom end of the lower mold and the top end of the moving block.

[0014] In the above solution, during the demolding process, due to the existence of the springs, a certain buffering effect can be exerted on the mold and the ejector pins, which helps to reduce the damage to the mold and the ejector pins caused by the impact force generated during the demolding process, thereby extending the service life of the mold and the ejector pins.

[0015] As an optimization of the above technical solution, fixing blocks are respectively fixedly connected to three side edges at the bottom end of the upper mold, and fixing grooves corresponding to the sizes of the three fixing blocks are respectively opened at three side edges at the top end of the lower mold.

[0016] In the above solution, the cooperation between the fixing blocks and the fixing grooves enables the upper mold and the lower mold to achieve precise positioning during mold closing, which not only ensures the alignment accuracy of the mold, but also makes the mold closing process faster and smoother, improving the production efficiency.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] In the present utility model, the driving force of the second cylinder enables the moving block to slide rapidly on the moving rod, thereby driving the ejector pins to move synchronously, realizing the rapid ejection of the product in the mold. This design significantly shortens the demolding time and improves the production efficiency. Since the top of the ejector pin is flush with the corresponding lower material guiding cavity and the four mold cavities, the ejector pin can accurately and evenly eject the product in the mold. This design avoids product deformation or damage caused by uneven demolding and ensures the integrity and quality of the product. During the demolding process, due to the existence of the springs, a certain buffering effect can be exerted on the mold and the ejector pins, which helps to reduce the damage to the mold and the ejector pins caused by the impact force generated during the demolding process, thereby extending the service life of the mold and the ejector pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of an injection mold for bipolar pins;

[0020] Figure 2 is a schematic diagram of the overall sectional structure of an injection mold for bipolar pins;

[0021] Figure 3 It is a schematic diagram of the lower die structure in an injection mold for a bipolar pin;

[0022] Figure 4 It is a schematic diagram of the sectional structure of the lower die in an injection mold for a bipolar pin;

[0023] Figure 5 It is a schematic diagram of the upper die structure in an injection mold for a bipolar pin;

[0024] Figure 6 It is a schematic diagram of the sectional structure of the upper die in an injection mold for a bipolar pin.

[0025] In the figure: 10, upper frame; 11, lower frame; 12, sliding rod; 13, first cylinder; 14, connecting block; 15, upper die; 16, lower die; 17, moving groove; 20, material guiding hole; 21, upper material guiding cavity; 22, lower material guiding cavity; 30, first cooling groove; 31, second cooling groove; 40, moving rod; 41, moving block; 42, ejector pin; 43, second cylinder; 50, spring; 60, fixing block; 61, fixing groove. Specific implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Embodiment 1

[0028] Such as Figure 1 And Figure 2As shown, the utility model provides a technical solution: an injection mold for a bipolar pin, comprising an upper frame 10 and a lower frame 11, wherein the four corners at the bottom end of the upper frame 10 are respectively fixedly connected to sliding rods 12, and the other ends of the four sliding rods 12 are respectively fixedly connected to the four corners at the top end of the lower frame 11, and the top end of the upper frame 10 is fixedly connected to a first cylinder 13, and the output end of the first cylinder 13 passes through the upper frame 10 and is slidably connected to the upper frame 10, and the output end of the first cylinder 13 is fixedly connected to a connecting block 14, and the bottom end of the connecting block 14 is fixedly connected to an upper mold 15, and the four corners of the upper mold 15 are slidably sleeved on the outside of the four sliding rods 12, and the top end of the lower frame 11 is provided with a lower mold 16, and the four corners of the lower mold 16 are sleeved on the outside of the four sliding rods 12, and the top end of the lower frame 11 is provided with a moving groove 17, and the moving groove 1 7 is provided with a demoulding assembly. During specific use, the sliding rods 12 are fixedly connected at the four corners of the upper frame 10 and the lower frame 11 respectively to ensure the stable movement of the upper mold 15 in the vertical direction. This design avoids the deviation or shaking of the mold during the mold closing or demoulding process, thereby improving the stability of the mold and the precision of product molding. The design of the first cylinder 13 makes the opening and closing operation of the mold simpler and more automated. By controlling the extension and contraction of the first cylinder 13, the upper mold 15 and the lower mold 16 can be easily opened and closed quickly, reducing the need for manual operation and improving production efficiency. The demoulding assembly arranged in the movable groove 17 can ensure that the product is quickly and completely ejected from the mold during the demoulding process, which not only improves the demoulding efficiency, but also helps to protect the mold and the product from damage.

[0029] As an implementation method in this embodiment, Figure 3 and Figure 5 As shown, a material guide hole 20 is opened at the center of the upper mold 15, an upper material guide cavity 21 is opened between the four mold cavities of the upper mold 15, the upper material guide cavity 21 is connected to the four mold cavities of the upper mold 15, the material guide hole 20 is connected to the upper material guide cavity 21, a lower material guide cavity 22 is opened between the four mold cavities of the lower mold 16, and the lower material guide cavity 22 is connected to the four mold cavities of the lower mold 16. During specific use, by setting the upper material guide cavity 21 and the lower material guide cavity 22, and these cavities are connected with the mold cavity and the material guide hole 20, it can be ensured that the molten material flows more smoothly in the mold, which avoids the problems of blockage or poor flow that may occur during the injection or molding process, thereby improving production efficiency.

[0030] As an implementation method in this embodiment, Figure 4 and Figure 6As shown in the figure, a first cooling groove 30 is provided inside the upper mold 15. Both ends of the first cooling groove 30 are opened on one outer wall of the upper mold 15. A second cooling groove 31 is provided inside the lower mold 16. Both ends of the second cooling groove 31 are opened on one outer wall of the lower mold 16. During the specific use process, the design of the cooling groove allows a cooling medium such as coolant or cooling water to flow inside the mold, thereby more evenly reducing the temperature of the mold, enabling the cooling time of the plastic part in the mold to be shortened, and thus shortening the entire production cycle.

[0031] As an implementation manner in this embodiment, as Figure 2 shown, the demolding assembly includes moving rods 40 fixedly connected to the four corners of the inner bottom wall of the moving groove 17. One ends of the four moving rods 40 far from the inner bottom wall are fixedly connected to the bottom end of the lower mold 16. A moving block 41 is slidably sleeved on the outer sides of the four moving rods 40. A plurality of ejector pins 42 are fixedly connected to the top end of the moving block 41. The plurality of ejector pins 42 vertically penetrate the lower mold 16 and are slidably connected to the lower mold 16. The top ends of the plurality of ejector pins 42 are respectively flush with the corresponding lower material guiding channels 22. A second cylinder 43 is fixedly connected to the bottom end of the lower frame 11. The output end of the second cylinder 43 penetrates the lower frame 11 and is slidably connected to the lower frame 11. The output end of the second cylinder 43 is fixedly connected to the bottom end of the moving block 41. Legs (not shown in the figure) are also fixedly installed at the bottom end of the lower frame 11. Therefore, it will not affect the normal use of the second cylinder 43. During the specific use process, the moving block 41 is driven to slide on the moving rods 40 by the second cylinder 43, and then drives the plurality of ejector pins 42 to move synchronously, making the demolding process faster and more efficient. Due to the design that the top ends of the ejector pins 42 are flush with the corresponding lower material guiding channels 22 and the four mold cavities, the ejector pins 42 can accurately and evenly eject the products in the mold, avoiding product deformation or damage caused by uneven demolding, and thus ensuring the demolding quality.

[0032] As an implementation manner in this embodiment, as Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, springs 50 are respectively arranged on the outer sides of the four moving rods 40. Both ends of the four springs 50 are respectively fixedly connected to the bottom end of the lower mold 16 and the top end of the moving block 41. During the specific use process, during the demolding process, due to the existence of the springs 50, a certain buffering effect can be generated on the mold and the ejector pins 42, which helps to reduce the damage of the mold and the ejector pins 42 caused by the impact force generated during the demolding process, and thus extends the service life of the mold and the ejector pins 42.

[0033] As an implementation manner in this embodiment, as Figures 1-6As shown in the figure, fixed blocks 60 are respectively fixedly connected to the three side edges at the bottom end of the upper mold 15, and fixing grooves 61 corresponding to the sizes of the three fixed blocks 60 are respectively formed at the three side edges at the top end of the lower mold 16. During the specific use process, the cooperation between the fixed blocks 60 and the fixing grooves 61 enables the upper mold 15 and the lower mold 16 to achieve precise positioning during mold closing. This not only ensures the alignment accuracy of the molds, but also makes the mold closing process faster and smoother, improving production efficiency.

[0034] Working principle: By controlling the telescopic movement of the first cylinder 13, the upper mold 15 slides downward along the sliding rod 12 to close the mold with the lower mold 16. The cooperation between the fixed blocks 60 and the fixing grooves 61 will ensure the precise alignment of the upper mold 15 and the lower mold 16, improving the molding accuracy. The molten material is injected into the upper material guiding channel 21 and the lower material guiding channel 22 through the feeding port, and the molten material then flows into the four mold cavities through the upper material guiding channel 21 and the lower material guiding channel 22. The cooling system is started, so that the cooling medium such as coolant or cooling water flows in the cooling tank through the inlet and outlet ends of the cooling tank. The cooling medium evenly reduces the temperature of the mold, enabling the plastic part to be quickly cooled in the mold. The second cylinder 43 is controlled to drive the moving block 41 to slide upward on the moving rod 40, and the moving block 41 drives the ejector pin 42 to move upward synchronously. The ejector pin 42 accurately and evenly ejects the bipolar pin product in the mold. The spring 50 provides a buffering effect during the demolding process, reducing the impact force on the mold and the ejector pin 42.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. An injection mold for a bipolar pin, comprising an upper frame (10) and a lower frame (11), characterized in that: The four corners at the bottom of the upper frame (10) are respectively fixedly connected to sliding rods (12), and the other ends of the four sliding rods (12) are respectively fixedly connected to the four corners at the top of the lower frame (11). The top of the upper frame (10) is fixedly connected to a first cylinder (13), the output end of the first cylinder (13) passes through the upper frame (10) and is slidably connected to the upper frame (10), the output end of the first cylinder (13) is fixedly connected to a connecting block (14), the bottom end of the connecting block (14) is fixedly connected to an upper mold (15), the four corners of the upper mold (15) are slidably sleeved on the outside of the four sliding rods (12), the top of the lower frame (11) is provided with a lower mold (16), the four corners of the lower mold (16) are sleeved on the outside of the four sliding rods (12), the top of the lower frame (11) is provided with a moving groove (17), and the moving groove (17) is provided with a A demoulding assembly is arranged, the demoulding assembly comprises moving rods (40) fixedly connected to four corners of the inner bottom wall of the moving groove (17), one end of the four moving rods (40) away from the inner bottom wall of the moving groove (17) is fixedly connected to the bottom end of the lower mold (16), the outer sides of the four moving rods (40) are slidably sleeved with moving blocks (41), the top end of the moving block (41) is fixedly connected to a plurality of ejector pins (42), the plurality of ejector pins (42) vertically penetrate the lower mold (16) and are slidably connected to the lower mold (16), the top ends of the plurality of ejector pins (42) are respectively flush with the corresponding lower material guiding channels (22), the bottom end of the lower frame (11) is fixedly connected to a second cylinder (43), the output end of the second cylinder (43) penetrates the lower frame (11) and is slidably connected to the lower frame (11), and the output end of the second cylinder (43) is fixedly connected to the bottom end of the moving block (41).

2. The injection mold for a bipolar pin according to claim 1, characterized in that: A material guide hole (20) is provided at the center of the upper mold (15); an upper material guide cavity (21) is provided between the four mold cavities of the upper mold (15); the upper material guide cavity (21) is connected to the four mold cavities of the upper mold (15); the material guide hole (20) is connected to the upper material guide cavity (21); a lower material guide cavity (22) is provided between the four mold cavities of the lower mold (16); the lower material guide cavity (22) is connected to the four mold cavities of the lower mold (16).

3. The injection mold for a bipolar pin according to claim 1, characterized in that: A first cooling groove (30) is provided inside the upper mold (15), and two ends of the first cooling groove (30) are provided on one side outer wall of the upper mold (15). A second cooling groove (31) is provided inside the lower mold (16), and two ends of the second cooling groove (31) are provided on one side outer wall of the lower mold (16).

4. The injection mold for a bipolar pin according to claim 1, characterized in that: Springs (50) are respectively arranged on the outside of the four moving rods (40), and two ends of the four springs (50) are respectively fixedly connected to the bottom end of the lower mold (16) and the top end of the moving block (41).

5. The injection mold for a bipolar pin according to claim 1, characterized in that: The three sides of the bottom end of the upper mold (15) are respectively fixedly connected with fixing blocks (60), and the three sides of the top end of the lower mold (16) are respectively provided with fixing grooves (61) corresponding to the sizes of the three fixing blocks (60).

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