Motorcycle headlamp rubber coating injection mold

Abstract

The utility model provides a motorcycle headlamp rubber coating injection mold which comprises an upper mold base, a lower mold base, two supporting bases, a mold bottom plate and a top cover plate, protruding block positioning bases are installed at the four corners of the top end of the lower mold base, and each protruding block positioning base corresponds to one positioning notch. A first contact parting surface and a first step parting surface are formed between the two positioning notches located on one side, a second contact parting surface and a second step parting surface are formed between the two protruding block positioning seats located on one side, and the second contact parting surface and the second step parting surface make contact with the first contact parting surface and the first step parting surface. An air guide flow channel is formed in the vertical surface of the step parting surface II and is communicated with the contact parting surface II and the step parting surface II; the mold can coincide with the surface wall of the finally-filled cavity, exhaust operation of the cavity is facilitated, gas in the cavity can be fully exhausted to the outer side of the mold, and internal defects of a formed headlamp product are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and relates to a rubber-coated injection mold for motorcycle headlights. Background Technology

[0002] The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and dimensions ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and upgrades, and can create complex shapes. Injection molding is suitable for mass production and molding of complex-shaped products. This method is particularly important for the batch production of complex-shaped parts. Therefore, injection molding is used to produce motorcycle headlights.

[0003] Existing technology, such as the injection mold for an electric vehicle headlight cover disclosed in patent publication number CN221834870U, includes an upper mold plate, an upper mold base below the upper mold plate, and an upper mold core block inside the bottom of the upper mold base. An injection port assembly is inserted into the upper mold plate, upper mold base, and upper mold core block. A lower mold base is located below the upper mold base, and a lower mold core block is located above the lower mold base. A support block and a lower mold plate are located below the lower mold base, and a support column and a sliding column are located above the lower mold plate. A top plate is fitted over the support column and sliding column, and a main ejector column and ejector rod are located on the top plate. A spring is located below the main ejector column. This invention utilizes the internal structure of the mold for a secondary demolding process, avoiding manual removal after mold opening, increasing product integrity, and preventing product breakage or edge lifting.

[0004] Although the above-mentioned injection mold has a good demolding effect, when the mold is closed and molten material is injected, the contact surface (parting surface) between the upper and lower molds is a linear structure. This contact surface does not coincide with the surface wall of the cavity that is finally filled. This will cause the gas inside the cavity to be unable to escape smoothly, affecting the quality of the headlight coating. To address this, we designed an injection mold for motorcycle headlight coating. Summary of the Invention

[0005] The purpose of this invention is to provide a rubber-coated injection mold for motorcycle headlights to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solution: a motorcycle headlight overmolding injection mold, comprising an upper mold base, a lower mold base, two support bases, a mold base plate, and a top cover plate. The upper mold base is connected to the lower mold base via four guide pillars, and the lower mold base is bolted to the mold base plate via two support bases. The upper mold base contains an upper headlight cavity, and the lower mold base contains a lower headlight cavity. The lower headlight cavity and the upper headlight cavity together form a molded cavity. The four corners at the bottom of the upper mold base are opened... The positioning slots are set, and protrusion positioning seats are installed at the four corners of the top of the lower mold base. Each protrusion positioning seat corresponds to each positioning slot. A contact parting surface one and a step parting surface one are formed between two positioning slots on one side. A contact parting surface two and a step parting surface two are formed between two protrusion positioning seats on one side. The contact parting surface two and the step parting surface two are in contact with the contact parting surface one and the step parting surface one. An air guide channel is provided on the vertical surface of the step parting surface two, and the air guide channel connects the contact parting surface two and the step parting surface two.

[0007] In the aforementioned injection mold for a motorcycle headlight, a sprue plate is installed at the center of the top of the top cover plate, a runner heating seat is installed at the bottom of the sprue plate, and a first hot runner and a second hot runner are installed at the bottom of the runner heating seat. The first and second hot runners correspond to the upper cavity of the headlight. This arrangement connects the sprue plate to the injection nozzle of the injection molding machine, allowing molten material to be injected into the runner heating seat. The runner heating seat then distributes the molten material to the first and second hot runners, facilitating simultaneous injection at both points, shortening the injection time, and preventing material cooling due to excessively long injection times.

[0008] The first hot runner is longer than the second hot runner. This allows it to connect to the two thicker-walled injection ports of the headlight.

[0009] In the aforementioned injection mold for overmolding a motorcycle headlight, heating wires are laid and connected in the groove of the runner heating seat. Both ends of the heating wires extend from the upper mold base and are connected to a terminal block. This arrangement facilitates heating of the runner heating seat, ensuring good fluidity of the molten material inside.

[0010] In the aforementioned injection mold for a motorcycle headlight, a gate heat insulation plate is provided at the bottom of the top cover plate. A recessed cavity is formed in the center of the gate heat insulation plate, and the runner heating seat is located within this cavity. Heating wires are routed within the gate heat insulation plate, and a terminal block is located on the side of the gate heat insulation plate. This arrangement facilitates the installation of the runner heating seat while simultaneously isolating the heat inside the runner heating seat from affecting the terminal block and the wiring of the heating wires.

[0011] In the aforementioned injection mold for overmolding a motorcycle headlight, locking strips are installed on one side of the front and one side of the back of the upper mold base. Each locking strip has a locking eye fitted with a fastening bolt that connects to the lower mold base. This design aims to achieve a good mold-locking effect, preventing temperature and pressure changes during the molding and cooling stage from causing the connection between the upper and lower mold bases to become unstable.

[0012] Compared with the prior art, the advantages of this utility model of motorcycle headlight overmolding injection mold are as follows: by forming a second contact parting surface and a second stepped parting surface between two protrusion positioning seats, the second contact parting surface and the second stepped parting surface are in contact with the first contact parting surface and the first stepped parting surface, and an airflow channel is set on the vertical surface of the second stepped parting surface, which connects the second contact parting surface and the second stepped parting surface. This allows it to coincide with the surface wall of the cavity that is finally filled, which is conducive to the venting operation of the cavity, so that the gas inside the cavity can be fully discharged to the outside of the mold, reducing internal defects after the headlight product is formed. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the injection mold for the rubber coating of the motorcycle headlight of this utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the mold base of the injection mold for the rubber coating of the motorcycle headlight of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the lower mold base of the injection mold for the rubber coating of the motorcycle headlight of this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the heating seat for the flow channel of the injection mold for the motorcycle headlight coating of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the heat insulation plate of the injection mold gate of the motorcycle headlight covering injection mold of this utility model.

[0018] Figure 6 This utility model relates to a rubber-coated injection mold for motorcycle headlights. Figure 1 A schematic diagram of the planar structure.

[0019] In the diagram, 1. Upper mold base; 2. Lower mold base; 3. Support base; 4. Mold base plate; 5. Top cover plate; 6. Sprue plate; 7. Electrical terminal block; 8. Mold locking strip; 9. Fastening bolt; 10. Upper cavity of headlight; 11. Positioning slot; 12. Contact parting surface one; 13. Stepped parting surface one; 14. Lower cavity of headlight; 15. Protrusion positioning seat; 16. Contact parting surface two; 17. Stepped parting surface two; 18. Air guide channel; 19. Runner heating seat; 20. Heating wire; 21. First hot runner; 22. Second hot runner; 23. Sprue heat insulation plate; 24. Cavity. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, this utility model relates to a rubber-coated injection mold for motorcycle headlights.

[0022] Example 1: The injection mold includes, but is not limited to, the following structure: upper mold base 1, lower mold base 2, two support bases 3, mold base plate 4, and top cover plate 5. The upper mold base 1 is connected to the lower mold base 2 through four guide pillars. The lower mold base 2 is bolted to the mold base plate 4 through two support bases 3. The upper mold base 1 is provided with an upper headlight cavity 10, and the lower mold base 2 is provided with a lower headlight cavity 14. The lower headlight cavity 14 and the upper headlight cavity 10 form a cavity.

[0023] To facilitate mold opening and closing, it may also include mold opening templates, mold opening cylinders, or core inserts commonly found in the technology.

[0024] Furthermore, such as Figure 2 and Figure 3 As shown, positioning slots 11 are opened at the four corners of the bottom of the upper mold base 1, and protrusion positioning seats 15 are installed at the four corners of the top of the lower mold base 2. Each protrusion positioning seat 15 corresponds to each positioning slot 11. A contact parting surface 12 and a step parting surface 13 are formed between two positioning slots 11 on one side. A contact parting surface 2 16 and a step parting surface 2 17 are formed between two protrusion positioning seats 15 on one side. The contact parting surface 2 16 and the step parting surface 2 17 are in contact with the contact parting surface 12 and the step parting surface 13. An airflow channel 18 is provided on the vertical surface of the step parting surface 2 17, and the airflow channel 18 connects the contact parting surface 2 16 and the step parting surface 2 17.

[0025] Contact parting surface 12 and step parting surface 13 are distributed in a square shape along the width of the upper mold base 1, and contact parting surface 16 and step parting surface 17 are distributed in a square shape along the width of the lower mold base 2. They are all integrally formed on the upper mold base 1 or the lower mold base 2. This is conducive to the venting operation of the cavity, so that the gas inside the cavity can be fully discharged to the outside of the mold, reducing internal defects after the headlight product is formed.

[0026] Example 2: The injection mold includes an upper mold base 1, a lower mold base 2, two support bases 3, a mold base plate 4, and a top cover plate 5. The upper mold base 1 is connected to the lower mold base 2 through four guide pillars. The lower mold base 2 is bolted to the mold base plate 4 through two support bases 3. The upper mold base 1 is provided with a headlight upper cavity 10, and the lower mold base 2 is provided with a headlight lower cavity 14. The headlight lower cavity 14 and the headlight upper cavity 10 form a cavity. A sprue plate 6 is installed at the center of the top of the top cover plate 5. A runner heating seat 19 is installed at the bottom of the sprue plate 6. A first hot runner 21 and a second hot runner 22 are installed at the bottom of the runner heating seat 19. The length of the first hot runner 21 is greater than the length of the second hot runner 22. The first hot runner 21 and the second hot runner 22 correspond to the headlight upper cavity 10, so that they can be connected step by step to the two thicker wall injection ports of the headlight.

[0027] A heating wire 20 is laid and connected in the wire groove of the runner heating seat 19. Both ends of the heating wire 20 are led out of the upper mold seat 1 and connected to the power terminal block 7. A gate heat insulation plate 23 is provided at the bottom of the top cover plate 5. A cavity 24 is opened in the middle of the gate heat insulation plate 23. The runner heating seat 19 is located in the cavity 24 and the heating wire 20 is laid in the gate heat insulation plate 23. The power terminal block 7 is located on the side of the gate heat insulation plate 23.

[0028] The injection nozzle of the injection molding machine is connected through the sprue plate 6. The molten material is injected into the runner heating seat 19 through the injection nozzle. The runner heating seat 19 divides the molten material into the first hot sprue 21 and the second hot sprue 22, which facilitates simultaneous injection at two points, helps to shorten the injection time, and prevents the material from cooling due to excessive injection time. At the same time, the heating wire 20 heats the runner heating seat 19, which makes the molten material inside the runner heating seat 19 flow better.

[0029] like Figure 1 As shown, in order to better lock the upper mold base 1 and the lower mold base 2, locking strips 8 are installed on one side of the front and one side of the back of the upper mold base 1, and fastening bolts 9 connected to the lower mold base 2 are installed at the keyhole of each locking strip 8.

[0030] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A motorcycle headlight overmolding injection mold, comprising an upper mold base (1), a lower mold base (2), two support bases (3), a mold base plate (4), and a top cover plate (5), wherein the upper mold base (1) is connected to the lower mold base (2) by four guide pillars, and the lower mold base (2) is bolted to the mold base plate (4) by two support bases (3), wherein the upper mold base (1) is provided with an upper headlight cavity (10), and the lower mold base (2) is provided with a lower headlight cavity (14), wherein the lower headlight cavity (14) and the upper headlight cavity (10) form a cavity, characterized in that: The upper mold base (1) has four positioning slots (11) at the bottom corners, and the lower mold base (2) has four protrusion positioning seats (15) at the top corners. Each protrusion positioning seat (15) corresponds to each positioning slot (11). A first contact parting surface (12) and a first step parting surface (13) are formed between two positioning slots (11) on one side. A second contact parting surface (16) and a second step parting surface (17) are formed between two protrusion positioning seats (15) on one side. The second contact parting surface (16) and the second step parting surface (17) are in contact with the first contact parting surface (12) and the first step parting surface (13). An airflow channel (18) is provided on the vertical surface of the second step parting surface (17). The airflow channel (18) connects the second contact parting surface (16) and the second step parting surface (17).

2. The injection mold for overmolding a motorcycle headlight according to claim 1, characterized in that, A sprue plate (6) is installed at the top center of the top cover plate (5). A runner heating seat (19) is installed at the bottom of the sprue plate (6). A first hot sprue nozzle (21) and a second hot sprue nozzle (22) are installed at the bottom of the runner heating seat (19). The first hot sprue nozzle (21) and the second hot sprue nozzle (22) correspond to the upper cavity (10) of the headlight.

3. The injection mold for overmolding a motorcycle headlight according to claim 2, characterized in that, Heating wires (20) are laid and connected in the groove of the flow channel heating seat (19). Both ends of the heating wires (20) are led out from the upper mold seat (1) and connected to the power terminal seat (7).

4. The injection mold for overmolding a motorcycle headlight according to claim 3, characterized in that, The bottom end of the top cover plate (5) is provided with a gate heat insulation plate (23), and a cavity (24) is opened in the middle of the gate heat insulation plate (23). The runner heating seat (19) is located in the cavity (24) and the heating wire (20) is laid in the gate heat insulation plate (23). The power terminal block (7) is located on the side of the gate heat insulation plate (23).

5. The injection mold for overmolding a motorcycle headlight according to claim 1, characterized in that, Locking strips (8) are installed on one side of the front and one side of the back of the upper mold base (1), and fastening bolts (9) connected to the lower mold base (2) are installed at the lock hole of each locking strip (8).

6. The injection mold for overmolding a motorcycle headlight according to claim 2, characterized in that, The length of the first hot runner (21) is greater than the length of the second hot runner (22).

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