Hardware terminal embedding injection molding mold

Abstract

The present application relates to terminal injection, a hardware terminal embedded injection molding mold, which comprises: an injection mold, the bottom of the injection mold is provided with a pressure die set, and the pressure die set is synchronized with the injection mold to close. When the injection mold is closed, the elastic pre-pressure is applied to the pin by the floating pressure head pre-contacting the pin of the terminal body, and the pressing force on the terminal gradually increases with the increase of the closing stroke, until all the terminals are pressed to the same reference plane; after the injection mold is closed, the cylinder pushes the carrier plate, the adjusting rod on the carrier plate is inserted into the space between the pins, the carrier plate drives the adjusting die to move outward of the pressure die set through the transmission assembly, the adjusting die moves outward first to release the pressing force of the compressed spring, then the adjusting rod drives the adjusting rod to move transversely through the distance adjusting rod, and the space between the pins is adjusted to prevent the pins at the pressure die set part from being pushed out of the crease by the adjusting rod when adjusting the space between the pins.

Description

Technical Field

[0001] This invention relates to the field of terminal injection molding technology, and more specifically to a hardware terminal embedding injection molding mold. Background Technology

[0002] Metal terminal embedding injection molding is a molding process in which metal terminals (metal stamping parts) are pre-inserted into a mold cavity, and then the mold is closed and injection molded, so that molten resin encapsulates the metal terminals and bonds them together. This process is widely used in the manufacture of electronic components such as home appliance connectors, automotive connectors, relays, and switches, and can achieve efficient and precise bonding between metal terminals and plastic shells.

[0003] Previously existing technical problems with terminal injection molding were: First, during the stamping, electroplating, and transportation processes, the terminal pins were easily subjected to forward compression, resulting in height differences and causing the terminal to be either too high or too low in size. Second, during transportation, the terminals were subjected to lateral forces due to vibration, collision, and compression, leading to pin bending, tilting, and changes in pin spacing.

[0004] When traditional injection molds embed terminals, problems such as uneven terminal height and pin tilting are retained or even amplified in the molded product, resulting in the final product failing to meet assembly and usage requirements. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a metal terminal embedding injection molding mold.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A metal terminal embedding injection molding die includes: an injection mold, a pressure module installed at the bottom of the injection mold, the pressure module closing synchronously with the injection mold; the pressure module includes a moving mold and a fixed mold, a pressure mold installed in the moving mold, an adjusting mold installed in the fixed mold, a floating pressure head elastically connected to the adjusting mold, a transmission assembly fixedly installed in the fixed mold, and a carrier plate slidably installed, the carrier plate being connected to the adjusting mold through the transmission assembly, the carrier plate being driven by a driving component, and a plurality of adjustable pitch components installed in the carrier plate; when the driving component pushes the carrier plate forward, the pitch components in the carrier plate extend into the pin gap of the terminal body.

[0008] As a further aspect of the present invention: the adjusting mold is connected to the floating pressure head via a guide rod, and a compression spring is installed between the adjusting mold and the floating pressure head.

[0009] As a further embodiment of the present invention: the transmission assembly includes a fixed sleeve fixedly installed inside the fixed mold, an upper rack installed at the bottom of the carrier plate, a lower rack installed on the adjusting mold, a gear inside the fixed sleeve, and the upper rack and lower rack being connected to each other on both sides of the gear.

[0010] As a further aspect of the present invention: the adjusting component includes an adjusting rod, which is connected to an adjusting rod via a guide sleeve, and the adjusting rod extends into the pin gap of the terminal body.

[0011] As a further aspect of the present invention: an adjustment groove is formed inside the vehicle plate, and an adjustment rod is slidably installed inside the adjustment groove.

[0012] As a further embodiment of the present invention: the adjusting rod is slidably installed in the guide groove of the guide sleeve, and the adjusting rod is connected to the guide groove wall by a spring.

[0013] As a further aspect of the present invention: an arc-shaped groove is formed inside the adjusting groove, and an adjusting slide rod is installed on the adjusting rod, the adjusting slide rod being slidably installed inside the arc-shaped groove.

[0014] As a further aspect of the present invention: a positioning head is installed on the top of the injection mold, and the terminal body is fixed by inserting the positioning head into the positioning hole of the terminal body.

[0015] The beneficial effects of this invention are:

[0016] (1) Considering the height difference of the terminal body pins: When the mold is closed, the floating pressure head is used to pre-contact the terminal body pins to apply elastic pre-pressure. As the mold closing stroke increases, the pressure spring on the floating pressure head is compressed, and the clamping force on the terminal gradually increases until all terminals are pressed to the same reference plane, so as to avoid the impact of the height difference of the terminals on injection molding.

[0017] To address the issue of narrowing pin spacing on the terminal body: after the injection mold closes, the cylinder pushes the carrier plate, inserting the adjusting rod on the carrier plate into the spacing between the pins. The carrier plate then drives the adjusting mold to move outward from the pressure module via the transmission assembly. This outward movement of the adjusting mold first releases the clamping force of the compression spring, and then the adjusting rod moves laterally to adjust the spacing between each pin, preventing the pins in the pressure module from being pushed out and creased by the adjusting rod when adjusting the pin spacing.

[0018] (2) The present invention first uses the clamping force generated by the floating pressure head during mold closing to press all terminals to the same reference plane, and then uses the pitch adjustment component to adjust the pin spacing to avoid adjusting the pin spacing first and then pressing the terminals flat. When pressing flat, the pin spacing will also change slightly due to the influence of the height difference of the pins.

[0019] (3) In the initial state, the adjusting rod is centered and the corresponding pin spacing is unchanged, so no adjustment is needed; otherwise, if the corresponding pin spacing changes, the adjusting rod needs to be adjusted by moving it laterally. After all the adjusting rods are adjusted, during the process of the adjusted rod moving laterally to both sides, the adjusting slide on the adjusting rod slides along both sides of the arc groove, so that the adjusting rod moves slightly towards the terminal body. The adjusting rod extends out from the guide groove of the guide sleeve. When the driving component pushes into the carrier plate, the forward-moving adjusting rod is pre-inserted into the gap where the pin spacing changes. After adjusting this part, the remaining adjusting rods are inserted into the remaining pin spacing to disperse stress. This is suitable for working conditions where the terminal body is long and there are many pins. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a front view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the disassembled structure of the pressure module;

[0024] Figure 4 This is a schematic diagram of the connection structure between the adjusting mold and the pressing mold;

[0025] Figure 5 This is a diagram showing the fit between the floating pressure head and the die structure;

[0026] Figure 6 This is a front view of the floating pressure head and die structure;

[0027] Figure 7 This is a schematic diagram of the vehicle plate and the adjustable distance assembly structure;

[0028] Figure 8 This is a schematic diagram of the connection structure between the adjustment mold and the carrier plate;

[0029] Figure 9 yes Figure 8 Enlarged view of the structure of part A;

[0030] Figure 10 This is a top view of the connection structure between the vehicle plate and the adjustment mold;

[0031] Figure 11 This is a schematic diagram of the overall structure of the adjustable distance assembly.

[0032] In the diagram: 1. Injection mold; 2. Pressure module; 201. Moving mold; 202. Adjusting mold; 203. Press mold; 204. Fixed mold; 205. Floating pressure head; 206. Guide rod; 207. Compression spring; 3. Positioning head; 4. Terminal body; 5. Carrier plate; 6. Adjustment assembly; 601. Adjustment rod; 602. Guide sleeve; 603. Spring; 604. Adjustment rod; 605. Adjustment slide rod; 7. Transmission assembly; 701. Fixed sleeve; 702. Gear; 703. Upper rack; 704. Lower rack; 8. Adjustment groove; 9. Arc groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] See Figures 1-10 A metal terminal embedding injection molding die includes: an injection mold 1, a pressure module 2 installed at the bottom of the injection mold 1, the pressure module 2 closing synchronously with the injection mold 1; the pressure module 2 includes a moving mold 201 and a fixed mold 204, a pressure mold 203 installed in the moving mold 201, an adjusting mold 202 installed in the fixed mold 204, the adjusting mold 202 being elastically connected to a floating pressure head 205, a transmission assembly 7 fixedly installed in the fixed mold 204, and a carrier plate 5 slidably installed, the carrier plate 5 being connected to the adjusting mold 202 via the transmission assembly 7, the carrier plate 5 being driven by a driving component, and a plurality of adjustable spacing components 6 installed within the carrier plate 5; when the driving component advances the carrier plate 5, the spacing components 6 within the carrier plate 5 extend into the pin gap of the terminal body 4. Specifically, the adjusting mold 202 is connected to the floating pressure head 205 via a guide rod 206, and a compression spring 207 is installed between the adjusting mold 202 and the floating pressure head 205. Specifically, the transmission assembly 7 includes a fixed sleeve 701 fixedly installed inside the fixed mold 204, an upper rack 703 installed at the bottom of the carrier plate 5, a lower rack 704 installed on the adjusting mold 202, a gear 702 built into the fixed sleeve 701, and the upper rack 703 and lower rack 704 being connected to each other on both sides of the gear 702. Specifically, a positioning head 3 is installed on the top of the injection mold 1, and the terminal body 4 is fixed by the positioning head 3 passing through the positioning hole of the terminal body 4.

[0036] It should be noted that before use, the terminal body 4 is fixed by inserting the positioning head 3 into the positioning hole of the terminal body 4, so that the pin of the terminal body 4 is located in the pressure module 2 area and the part of the terminal body 4 to be injected is located in the injection mold 1 area. Through the mold closing and injection of the injection mold 1, the molten resin is used to encapsulate the metal terminal body 4.

[0037] Considering the height difference of the pins of the terminal body 4: When the injection mold 1 of the present invention closes the mold, the floating pressure head 205 is used to pre-contact the pins of the terminal body 4 to apply elastic pre-pressure to the pins. As the mold closing stroke increases, the compression spring 207 on the floating pressure head 205 is compressed, and the clamping force on the terminal gradually increases until all terminals are pressed to the same reference plane, so as to avoid the influence of the height difference of the terminals on the injection molding.

[0038] Considering the two issues of narrowing pin spacing in terminal body 4: After the injection mold 1 is closed, the cylinder drive pushes the carrier plate 5 into the pressure module 2, inserting the adjustment rod 604 on the carrier plate 5 into the spacing between the pins. Since the compression force generated by the compression spring 207 after the injection mold 1 is closed fixes the terminal between the mold 203 and the floating pressure head 205, if the pin spacing is adjusted directly by the horizontal adjustment rod 601 and the adjustment rod 604, the pins in the pressure module 2 are prone to bending and creases.

[0039] Based on this, while advancing the carrier plate 5, the carrier plate 5 drives the upper rack 703 to move synchronously. The upper rack 703 is connected to the lower rack 704 via a transmission relationship. The carrier plate 5 drives the adjusting mold 202 to move outward from the pressure module 2. The outward movement of the adjusting mold 202 first releases the clamping force of the compression spring 207, and then drives the adjusting rod 604 to move laterally via the adjusting rod 601 to adjust the spacing of each pin. This prevents the pins in the pressure module 2 from being pushed out and creased by the adjusting rod 604 when adjusting the pin spacing. After the adjustment is completed, the cylinder drive drives the carrier plate 5 to reset. At this time, the adjusting mold 202 resets, and the clamping force of the floating pressure head 205 on the pins is reset. Finally, the terminal body 4 is processed by injection molding.

[0040] It should be noted that if the pin spacing is adjusted first and then the terminals are flattened, the pin spacing will change slightly due to the height difference of the pins when flattening.

[0041] To prevent this phenomenon, the present invention first uses the clamping force generated by the floating pressure head 205 during mold closing to press all terminals to the same reference plane, and then uses the pitch adjustment component 6 to adjust the pin spacing to avoid the problem of slight changes in pin spacing caused by the reversal of the adjustment order.

[0042] Example 2:

[0043] See Figures 10-11The adjusting assembly 6 includes an adjusting rod 601, which is connected to an adjusting rod 604 via a guide sleeve 602. The adjusting rod 604 extends into the pin gap of the terminal body 4. Specifically, an adjusting groove 8 is formed inside the carrier plate 5, and the adjusting rod 604 is slidably installed inside the adjusting groove 8. Specifically, the adjusting rod 604 is slidably installed in the guide groove of the guide sleeve 602, and the adjusting rod 604 is connected to the guide groove wall via a spring 603. Specifically, an arc-shaped groove 9 is formed inside the adjusting groove 8, and an adjusting slide rod 605 is installed on the adjusting rod 604, which is slidably installed inside the arc-shaped groove 9.

[0044] The second application method based on the scheme of adjusting pin spacing using the adjusting component 6 in Embodiment 1: After the injection mold 1 is closed and before the carrier plate 5 is advanced, the adjusting rod 601 and the adjusting rod 604 are adjusted in advance according to the pin spacing size. The adjustment method is as follows: In the initial state, the adjusting rod 604 is centered, and the corresponding pin spacing has not changed, so no adjustment is needed; conversely, if the corresponding pin spacing changes, the adjusting rod 604 needs to be adjusted by moving the adjusting rod 601 laterally.

[0045] After all the adjusting rods 601 are adjusted, during the process of the adjusted rod 604 moving laterally to both sides, the adjusting slide rod 605 on the adjusting rod 604 slides along both sides of the arc groove 9, causing the adjusting rod 604 to move slightly towards the terminal body 4. The adjusting rod 604 extends out of the guide groove of the guide sleeve 602. When the driving component pushes the carrier plate 5, the forward-moving adjusting rod 604 is pre-inserted into the gap where the pin spacing changes. After adjusting this part, the remaining adjusting rods 604 are then inserted into the remaining pin spacing to disperse stress. The force on a single pin is controllable, which is suitable for working conditions where the terminal body 4 is long and there are many pins.

[0046] It should be noted that if the pin spacing of terminal body 4 is severely bent or tilted, it should be considered a scrap part. The driving component of carrier plate 5 is a cylinder (not shown in the attached drawings). Cylinder driving technology is existing technology and therefore does not affect the integrity of this invention.

[0047] It should be noted that the adjusting rod 601 can be finely adjusted using the fine-tuning screw, thereby improving the adjustment accuracy.

[0048] How to use this invention:

[0049] Step 1: Fix the terminal body 4 by inserting the positioning head 3 into the positioning hole of the terminal body 4, so that the pin of the terminal body 4 is located in the pressure module 2 area and the part of the terminal body 4 to be injected is located in the injection mold 1 area. Through the mold closing and injection of the injection mold 1, the molten resin encapsulates the metal terminal body 4.

[0050] The second step: When the injection mold 1 is closed, the floating pressure head 205 is used to pre-contact the pins of the terminal body 4 to apply elastic pre-pressure to the pins. As the mold closing stroke increases, the compression spring 207 on the floating pressure head 205 is compressed, and the clamping force on the terminal gradually increases until all terminals are pressed to the same reference plane, so as to avoid the influence of the height difference of the terminals on the injection molding.

[0051] Step 3: After the injection mold 1 closes, the cylinder drive pushes the carrier plate 5 into the pressure module 2, inserting the adjusting rod 604 on the carrier plate 5 into the spacing between the pins. The carrier plate 5 drives the upper rack 703 to move synchronously. The upper rack 703 is connected to the lower rack 704 through the transmission relationship of the gear 702. The carrier plate 5 drives the adjusting mold 202 to move outward from the pressure module 2. The outward movement of the adjusting mold 202 first releases the clamping force of the compression spring 207, and then drives the adjusting rod 604 to move laterally through the adjusting rod 601, adjusting the spacing of each pin to prevent the pins in the pressure module 2 from being pushed out and creased by the adjusting rod 604 when adjusting the pin spacing. After the adjustment is completed, the cylinder drive drives the carrier plate 5 to reset. At this time, the adjusting mold 202 resets, and the clamping force of the floating pressure head 205 on the pins is reset. Finally, the terminal body 4 is processed by injection molding.

[0052] This invention utilizes a modular design for the pressure module 2, making the mold easier and faster to maintain, thus greatly reducing maintenance time, improving production efficiency, and lowering costs.

[0053] Working principle of the invention:

[0054] Before use, the terminal body 4 is fixed by inserting the positioning head 3 into the positioning hole of the terminal body 4, so that the pin of the terminal body 4 is located in the pressure module 2 area and the part of the terminal body 4 to be injected is located in the injection mold 1 area. Through the mold closing and injection of the injection mold 1, the molten resin encapsulates the metal terminal body 4.

[0055] Considering the height difference of the pins of the terminal body 4: When the injection mold 1 of the present invention closes the mold, the floating pressure head 205 is used to pre-contact the pins of the terminal body 4 to apply elastic pre-pressure to the pins. As the mold closing stroke increases, the compression spring 207 on the floating pressure head 205 is compressed, and the clamping force on the terminal gradually increases until all terminals are pressed to the same reference plane, so as to avoid the influence of the height difference of the terminals on the injection molding.

[0056] Considering the two issues of narrowing pin spacing in terminal body 4: After the injection mold 1 is closed, the cylinder drive pushes the carrier plate 5 into the pressure module 2, inserting the adjustment rod 604 on the carrier plate 5 into the spacing between the pins. Since the compression force generated by the compression spring 207 after the injection mold 1 is closed fixes the terminal between the mold 203 and the floating pressure head 205, if the pin spacing is adjusted directly by the horizontal adjustment rod 601 and the adjustment rod 604, the pins in the pressure module 2 are prone to bending and creases.

[0057] Based on this, while advancing the carrier plate 5, the carrier plate 5 drives the upper rack 703 to move synchronously. The upper rack 703 is connected to the lower rack 704 via a transmission relationship. The carrier plate 5 drives the adjusting mold 202 to move outward from the pressure module 2. The outward movement of the adjusting mold 202 first releases the clamping force of the compression spring 207, and then drives the adjusting rod 604 to move laterally via the adjusting rod 601 to adjust the spacing of each pin. This prevents the pins in the pressure module 2 from being pushed out and creased by the adjusting rod 604 when adjusting the pin spacing. After the adjustment is completed, the cylinder drive drives the carrier plate 5 to reset. At this time, the adjusting mold 202 resets, and the clamping force of the floating pressure head 205 on the pins is reset. Finally, the terminal body 4 is processed by injection molding.

[0058] Furthermore, if the pin spacing is adjusted first and then the terminals are flattened, the pin spacing will still change slightly due to the height difference of the pins. To prevent this phenomenon, the present invention first uses the clamping force generated by the floating pressure head 205 during mold closing to press all terminals to the same reference plane, and then uses the spacing adjustment component 6 to adjust the pin spacing, avoiding the problem of slight changes in pin spacing caused by reversing the adjustment order.

Claims

1. A metal terminal embedding injection molding mold, characterized in that, The mold includes: an injection mold (1), a pressure module (2) installed at the bottom of the injection mold (1), and the pressure module (2) closing synchronously with the injection mold (1); The pressure module (2) includes a moving mold (201) and a fixed mold (204). A pressure mold (203) is installed in the moving mold (201), and an adjusting mold (202) is installed in the fixed mold (204). The adjusting mold (202) is elastically connected to a floating pressure head (205). A transmission assembly (7) is fixedly installed in the fixed mold (204), and a carrier plate (5) is slidably installed. The carrier plate (5) is connected to the adjusting mold (202) through the transmission assembly (7). The carrier plate (5) is driven by a driving component. Several adjustable pitch components (6) are installed in the carrier plate (5). When the driving component pushes the carrier plate (5), the pitch components (6) in the carrier plate (5) extend into the pin gap of the terminal body (4).

2. The metal terminal embedding injection molding mold according to claim 1, characterized in that, The adjusting mold (202) is connected to the floating pressure head (205) via a guide rod (206), and a compression spring (207) is installed between the adjusting mold (202) and the floating pressure head (205).

3. The metal terminal embedding injection molding mold according to claim 1, characterized in that, The transmission assembly (7) includes a fixed sleeve (701) fixedly installed inside the fixed mold (204), an upper rack (703) installed at the bottom of the carrier plate (5), a lower rack (704) installed on the adjusting mold (202), a gear (702) built into the fixed sleeve (701), and the upper rack (703) and the lower rack (704) being connected on both sides of the gear (702).

4. The metal terminal embedding injection molding mold according to claim 1, characterized in that, The adjusting assembly (6) includes an adjusting rod (601), which is connected to an adjusting rod (604) via a guide sleeve (602). The adjusting rod (604) extends into the pin gap of the terminal body (4).

5. The metal terminal embedding injection molding mold according to claim 4, characterized in that, An adjustment groove (8) is provided inside the vehicle plate (5), and an adjustment rod (604) is slidably installed inside the adjustment groove (8).

6. The metal terminal embedding injection molding mold according to claim 5, characterized in that, The adjusting rod (604) is slidably installed in the guide groove of the guide sleeve (602), and the adjusting rod (604) is connected to the guide groove wall by a spring (603).

7. The metal terminal embedding injection molding mold according to claim 6, characterized in that, An arc-shaped groove (9) is opened inside the adjustment groove (8), and an adjustment slide rod (605) is installed on the adjustment rod (604). The adjustment slide rod (605) is slidably installed inside the arc-shaped groove (9).

8. The metal terminal embedding injection molding mold according to claim 1, characterized in that, The injection mold (1) is equipped with a positioning head (3) on the top, and the terminal body (4) is fixed by inserting the positioning head (3) into the positioning hole of the terminal body (4).

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