An injection mold capable of secondary spray forming

Abstract

The utility model discloses a kind of injection mould capable of secondary spray forming, belong to injection mould technical field.Mould main body has first die and second die, first die is provided with first cavity to form first structural member, second die is provided with second cavity to form second structural member on the basis of first structural member.First die and second die change the position of relative mould main body along first direction movement, second die side injection inlet is injected into second cavity by injection runner. The injection mould combines product spraying and injection molding process, realizes integrated operation, avoids the cumbersome process of traditional spraying process. This integrated design reduces environmental pollution in production, shortens product process cycle, reduces production development cost, improves manufacturing efficiency and economic benefit.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular relates to an injection mold capable of secondary spray coating. Background Technology

[0002] Some plastic products require further spraying after injection molding to improve their appearance and performance. This subsequent step not only increases the preparatory work before spraying, such as surface cleaning, masking non-spraying areas, and paint mixing, but also introduces a complete spraying process, including multiple steps such as primer spraying, baking and curing, and topcoat spraying.

[0003] Currently, surface coating of products is typically performed as a separate process after the plastic product has been injection molded and demolded. This coating process often releases large amounts of volatile organic compounds (VOCs) and particulate pollutants. If these are emitted directly without effective treatment, they will cause continuous pollution to the surrounding atmosphere and ecosystem. Therefore, it is essential to install waste gas collection and purification devices and strictly adhere to environmental standards. This secondary processing method not only increases investment in paints, consumables, and specialized equipment, but also raises labor costs due to the multiple steps involved, and significantly increases environmental remediation expenses. In summary, traditional coating processes increase overall production costs, reduce production efficiency due to process complexity, and are detrimental to resource optimization and green manufacturing. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art by providing an injection mold capable of secondary spray coating, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an injection mold capable of secondary spray coating, comprising a mold body, wherein a first mold core and a second mold core are provided within the mold body, a first cavity is provided at the position of the first mold core to form a first structural component, and a second cavity is provided at the position of the second mold core to form a second structural component based on the first structural component, wherein the first mold core and the second mold core move along a first direction to change the position of the first mold core and the second mold core relative to the mold body, and an injection port is provided on the side of the second mold core, wherein the injection port injects the spray coating material into the second cavity through an injection channel.

[0006] In a preferred embodiment of the present invention, the mold body includes an upper template, an upper module, a lower module, and a lower template arranged sequentially, wherein the first mold core and the second mold core are located within the lower module.

[0007] In a preferred embodiment of this utility model, two sets of hydraulic cylinders are provided on the lower template. The hydraulic cylinders are connected to the lower module to change the position of the first mold core and the second mold core relative to the upper module through the lower module.

[0008] In a preferred embodiment of the present invention, two hydraulic cylinders are arranged on the lower template along the first direction to move the first mold core and the second mold core along the first direction.

[0009] In a preferred embodiment of this utility model, a limit block is provided at the end of the lower template to limit the lower module.

[0010] In a preferred embodiment of this utility model, the lower template is provided with a guide groove, and the bottom of the lower module cooperates with the guide groove to guide the lower module to move.

[0011] In a preferred embodiment of this utility model, the injection port is formed inside the lower module, and the spray paint is injected into the first structural member through the injection port to form the second structural member.

[0012] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0013] This invention combines the product spraying and injection molding processes into a single integrated operation, eliminating the cumbersome process of separate spraying required in traditional manufacturing. This integrated design significantly reduces potential environmental pollution during production, effectively shortens the overall product manufacturing cycle, and substantially lowers various costs in the product development and production stages, thereby improving manufacturing efficiency and economic benefits. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of another overall structure of a preferred embodiment of the present invention;

[0017] Figure 3 This is a top view of a preferred embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the second structural component of a preferred embodiment of the present invention;

[0019] In the diagram: 10. Mold body; 11. Lower module; 12. Lower template; 121. Guide groove; 20. First mold core; 21. First cavity; 30. Second mold core; 31. Second cavity; 40. First structural component; 50. Second structural component; 60. Injection port; 70. Injection channel; 80. Hydraulic cylinder; 90. Limiting block. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0021] Combination Figures 1 to 4 As shown, this embodiment provides an injection mold capable of secondary spray coating, including a mold body 10. A first mold core 20 and a second mold core 30 are provided inside the mold body 10. A first cavity 21 is provided at the position of the first mold core 20 to form a first structural component 40. A second cavity 31 is provided at the position of the second mold core 30 to form a second structural component 50 based on the first structural component 40. The first mold core 20 and the second mold core 30 move along a first direction to change the position of the first mold core 20 and the second mold core 30 relative to the mold body 10. An injection port 60 is provided on the side of the second mold core 30. The injection port 60 injects the spray coating material into the second cavity 31 through the injection channel 70.

[0022] Specifically, after the first structural component 40 is injection molded in the first cavity 21, the first mold core 20 and the second mold core 30 move along the first direction under the drive of the hydraulic cylinder 80, causing the first structural component 40 to move to the position of the second cavity 31 for spraying injection. At this time, the injection port 60 injects the spray paint stably into the second cavity 31 through the injection channel 70, forming a uniform coating of the second structural component 50 on the surface of the first structural component 40, thus forming the second structural component 50 and realizing continuous production from substrate molding to surface spraying. The guide groove 121 on the lower template 12 and the bottom of the lower module 11 cooperate to ensure the stability and positional accuracy of the lower module 11 during movement, while the limiting block 90 effectively limits the travel of the lower module 11, avoiding mold damage or product quality deviation due to excessive displacement. The path design of the injection channel 70 fully considers the fluidity of the spray paint. By optimizing the cross-sectional dimensions and corner curvature of the channel, the resistance and residue of the paint during the transmission process are reduced, ensuring that the coating thickness is consistent throughout the second cavity 31, thus improving the uniformity and aesthetics of the product surface quality. This design is not only suitable for single-color spraying needs, but also allows for the secondary molding of multi-color coatings within the same mold by changing different colors of spray paint, further expanding the design possibilities and application scenarios of the product.

[0023] In this embodiment, the mold body 10 is composed of multiple key components assembled in sequence, specifically including an upper template (not shown in the figure), an upper module (not shown in the figure), a lower module 11 and a lower template 12 arranged in sequence. The first mold core 20 and the second mold core 30 are installed and fixed in the internal structure of the lower module 11. This layout realizes the stable operation and precise forming function of the mold.

[0024] Specifically, two sets of hydraulic cylinders 80 are mounted on the upper surface of the lower template 12. Each set of hydraulic cylinders 80 is reliably connected to the lower template 12 by bolts or other fasteners, and the piston rod end of the hydraulic cylinder 80 is rigidly connected to the lower module 11. With this arrangement, the hydraulic cylinders 80 can drive the lower module 11 to produce precise displacement relative to the upper module, thereby changing the relative position between the first mold core 20 and the second mold core 30 fixed on the lower module 11 and the upper module. The two sets of hydraulic cylinders 80 are symmetrically arranged on the lower template 12 along a first direction, enabling them to work synchronously and jointly push the first mold core 20 and the second mold core 30 to perform smooth and synchronous linear movement along the first direction. Furthermore, limit blocks 90 are installed at the ends of the lower template 12. These limit blocks 90 are fixed by screws to mechanically limit the movement stroke of the lower module 11, preventing it from exceeding a preset range. Meanwhile, the lower template 12 has a guide groove 121 machined on its surface, and the bottom of the lower module 11 is provided with a matching guide rail or slider, so that the lower module 11 can be precisely guided along the trajectory of the guide groove 121 during movement, ensuring the stability and accuracy of the overall movement.

[0025] Furthermore, in this embodiment, the injection port 60 is specifically opened in the internal structure of the lower module 11. Through the injection port 60, the preset spray paint can be continuously and evenly injected into the designated area of ​​the first structural member 40, thereby effectively forming the second structural member 50 that meets the design requirements on the surface or inside of the first structural member 40.

[0026] In summary, in practical use, the injection mold of this embodiment first assembles and fixes the upper mold plate, upper module, lower module 11, and lower mold plate 12 of the mold body 10 according to preset positions to ensure tight connection of each component. Then, the equipment is started, and the first mold core 20 completes the injection molding of the first structural component 40 within the mold body 10 through the first cavity 21. After molding, the two sets of hydraulic cylinders 80 on the lower mold plate 12 drive the lower module 11 to move along the guide groove 121, causing the first mold core 20 and the second mold core 30 to move in the first direction, so that the first structural component 40 accurately reaches the position of the second cavity 31. At this time, the injection port 60 stably injects the spray paint into the second cavity 31 through the injection channel 70, forming the second structural component 50 on the basis of the first structural component 40. Throughout the process, the limiting block 90 strictly limits the displacement range of the lower module 11 to ensure precise connection of each process. After the second structural component 50 is formed, the hydraulic cylinder 80 drives the lower module 11 to reset, and the finished product can be removed. This continuous operation mode eliminates the need for transferring products to the spraying equipment after demolding, a step common in traditional processes. This reduces potential product damage from repeated handling and avoids fugitive VOC emissions during spraying, aligning with the trend of green production. In mass production scenarios, the mold's efficiency is even more significant. Furthermore, its modular design facilitates maintenance and upgrades. Changing the spray color or adjusting the coating thickness requires only replacing the paint supply system corresponding to injection port 60 or fine-tuning the parameters of injection channel 70, greatly shortening product changeover time and enhancing the company's ability to respond quickly to market demands.

[0027] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An injection mold capable of secondary spray coating, characterized in that, The mold includes a mold body (10), in which a first mold core (20) and a second mold core (30) are provided. A first cavity (21) is provided at the position of the first mold core (20) to form a first structural component (40), and a second cavity (31) is provided at the position of the second mold core (30) to form a second structural component (50) on the basis of the first structural component (40). The first mold core (20) and the second mold core (30) move along a first direction to change the position of the first mold core (20) and the second mold core (30) relative to the mold body (10). An injection port (60) is provided on the side of the second mold core (30), and the injection port (60) injects the spray paint into the second cavity (31) through the injection channel (70).

2. The injection mold capable of secondary spray coating as described in claim 1, characterized in that, The mold body (10) includes an upper template, an upper module, a lower module (11) and a lower template (12) arranged in sequence, and the first mold core (20) and the second mold core (30) are located in the lower module (11).

3. The injection mold capable of secondary spray coating as described in claim 2, characterized in that, Two sets of hydraulic cylinders (80) are provided on the lower template (12). The hydraulic cylinders (80) are connected to the lower module (11) so as to change the position of the first mold core (20) and the second mold core (30) relative to the upper module through the lower module (11).

4. The injection mold capable of secondary spray coating as described in claim 3, characterized in that, The two hydraulic cylinders (80) are arranged on the lower template (12) along the first direction to move the first mold core (20) and the second mold core (30) along the first direction.

5. An injection mold capable of secondary spray coating as described in claim 2, characterized in that, The lower template (12) is provided with a limit block (90) at its end to limit the lower module (11).

6. The injection mold capable of secondary spray coating as described in claim 2, characterized in that, The lower template (12) is provided with a guide groove (121), and the bottom of the lower module (11) cooperates with the guide groove (121) to guide the movement of the lower module (11).

7. The injection mold capable of secondary spray coating as described in claim 2, characterized in that, The injection port (60) is formed in the lower module (11). The spray paint is injected into the first structural member (40) through the injection port (60) to form the second structural member (50).

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