Method for processing a light-emitting injection-molded part of a motor vehicle

Abstract

This invention discloses a processing method for automotive light-emitting injection molded parts. The method includes processing using an injection molding apparatus. The apparatus includes an injection cavity composed of an upper mold and a lower mold, arranged at an angle, and a power device for driving the lower mold to move up and down. The lower mold has a groove, and the groove has a protrusion corresponding to the light-emitting area of ​​the automotive light-emitting injection molded part. The injection cavity has a shielded injection port and a light-transmitting injection port. When the lower mold moves upward to its upper limit, the protrusion fits into the upper mold. The processing method includes moving the lower mold upward to its upper limit, with the protrusion fitting into the upper mold, and then injecting black opaque material through the shielded injection port, while the light-transmitting injection port is sealed. After injection molding, the lower mold moves downward to its lower limit, and then injects light-transmitting material through the light-transmitting injection port. As described above, this invention eliminates the need for an additional processing step to remove the black opaque material from the light-emitting area after injection molding, thus improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, and in particular to a processing method for automotive luminous injection molded parts. Background Technology

[0002] Automotive illuminated injection molded parts contain multiple light-emitting areas. Existing automotive illuminated injection molded parts are typically monochrome injection molded products, formed using an injection mold, and are considered one-piece injection molded products. For example... Figure 1 As shown, the injection mold includes an injection cavity 13 consisting of a sprue 10, an upper mold 11 (where 11-1 is the light-emitting area of ​​the automotive light-emitting injection molded part, and 11-2 is the non-light-emitting area of ​​the automotive light-emitting injection molded part), and a lower mold 12. Its structure is simple, but because the monochrome injection molded product itself is made of transparent material, it is entirely translucent. Furthermore, the surface is initially covered with a black opaque material, and then the black opaque material is retained on the surface of the non-light-emitting area for further coverage, while the black opaque material on the surface of the light-emitting area is removed to allow it to emit light. In other words, existing automotive light-emitting injection molded part processing methods require an additional processing step after injection molding to remove the black opaque material from the light-emitting area, resulting in low production efficiency. Summary of the Invention

[0003] This invention provides a processing method for automotive luminous injection molded parts. This processing method eliminates the need for an additional processing step after injection molding to remove the black, opaque material from the luminous area, thereby improving production efficiency and solving the problems existing in the current automotive luminous injection molded parts processing methods described above.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] It is processed using an injection molding device, which includes an injection cavity composed of an upper mold and a lower mold and arranged at an angle, and a power device for driving the lower mold to move up and down; the lower mold has a groove, and the groove has a protrusion corresponding to the light-emitting area of ​​the automotive light-emitting injection molded part; the injection cavity has a shielding gate for introducing black opaque material and a light-transmitting gate for introducing light-transmitting material; when the lower mold moves upward to its upper limit, the protrusion fits against the upper mold;

[0006] The method for processing automotive light-emitting injection molded parts using the aforementioned injection molding equipment includes the following steps:

[0007] A. First, the lower mold is moved upward to its upper limit by the power device, and the protrusion is attached to the upper mold, occupying the light-emitting area of ​​the automotive light-emitting injection molded part. Then, black opaque material is introduced from the shielded injection port to perform injection molding of the shielded area. At this time, the light-transmitting injection port is in a sealed state.

[0008] B. After the shielding area described in step A above has been injection molded, the lower mold is moved downward to its lower limit by the power device, and then the light-transmitting material is introduced from the light-transmitting inlet to inject the light-emitting area.

[0009] A more specific technical solution than the above-mentioned technical solution could be that the power unit is located at the bottom of the injection molding device.

[0010] Furthermore, the shielded inlet is located at the upper end of the injection molding tank, and the light-transmitting inlet is located at the lower end of the injection molding tank.

[0011] Furthermore, the shielded inlet is located at the lower end of the injection molding tank, and the light-transmitting inlet is located at the upper end of the injection molding tank.

[0012] Furthermore, the power unit is a hydraulic cylinder.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0014] 1. The injection molding device used in this invention is based on the existing injection molding device for automotive light-emitting injection molded parts. The original injection cavity with only one inlet is changed to an injection cavity with two inlets (i.e., a shielded inlet and a light-transmitting inlet). The shielded inlet is used to inject black opaque material, while the light-transmitting inlet is used to inject light-transmitting material, forming two injection paths with different materials. At the same time, the lower mold is modified to be movable up and down and has a groove. The groove has a protrusion corresponding to the light-emitting area of ​​the automotive light-emitting injection molded part. When the shielded inlet is used to inject black opaque material into the shielded area, the lower mold moves upward to the upper limit so that the protrusion fits with the upper mold and occupies the light-emitting area of ​​the automotive light-emitting injection molded part. After the area is shielded, the lower mold moves downward to the lower limit, and the space is used by the light-transmitting inlet to inject light-transmitting material into the light-emitting area.

[0015] 2. In this invention, the lower mold is first moved upward to its upper limit using a power device, and black opaque material is injected through the shielded injection port for injection molding. After the shielded area is injection molded, the lower mold is then moved downward to its lower limit using the power device, and light-transmitting material is injected through the light-transmitting injection port for injection molding. This reduces the process of removing the shielding material from the light-emitting area. In other words, this invention does not require an additional processing step to remove the black opaque material from the light-emitting area after injection molding, thus improving production efficiency and solving the problems existing in the current automotive light-emitting injection molding processing methods described above. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an existing automotive light-emitting injection mold.

[0017] Figure 2A schematic diagram of the injection molding processing device of the present invention.

[0018] in, Figure 1 In the diagram, 10 represents the injection port, 11 represents the upper mold, 11-1 represents the luminous area of ​​the automotive luminous injection molded part, 11-2 represents the non-luminous area of ​​the automotive luminous injection molded part, 12 represents the lower mold, and 13 represents the injection cavity.

[0019] Figure 2 In the diagram, the numbers are: 1 - upper mold, 2 - lower mold, 2-1 - groove, 2-2 - protrusion, 3 - injection cavity, 4 - power unit, 5 - light-emitting area of ​​automotive light-emitting injection parts, 6 - shielded gate, and 7 - light-transmitting gate. Detailed Implementation

[0020] The invention will be further described in detail below with reference to examples:

[0021] This embodiment uses, as follows: Figure 2 The injection molding apparatus shown is used for processing. The injection molding apparatus includes an injection cavity 3 composed of an upper mold 1 and a lower mold 2, which are arranged at an angle, and a power device 4 that drives the lower mold 2 to move up and down. The lower mold 2 has a groove 2-1, and the groove 2-1 has a protrusion 2-2 corresponding to the light-emitting area 5 of the automotive light-emitting injection molded part. The injection cavity 3 has a shielding gate 6 for introducing black opaque material and a light-transmitting gate 7 for introducing light-transmitting material. When the lower mold 2 moves upward to its upper limit, the protrusion 2-2 fits into the upper mold 1. It is based on the existing automotive light-emitting injection molding apparatus, changing the original injection cavity 13 with only one gate 10 to two gates (i.e., shielding gate 6 and light-transmitting gate 7). The injection cavity 3 has a shielded inlet 6 for injecting black opaque material and a light-transmitting inlet 7 for injecting light-transmitting material, forming two injection paths with different materials. At the same time, the lower mold 12 is modified to be movable up and down and has a groove 2-1. The groove 2-1 has a protrusion 2-2 corresponding to the light-emitting area 5 of the automotive light-emitting injection part. When the shielded inlet 6 injects black opaque material to shield the area, the lower mold 2 moves upward to the upper limit so that the protrusion 2-2 fits with the upper mold 1 and occupies the light-emitting area of ​​the automotive light-emitting injection part. After shielding the area, the lower mold 2 moves downward to the lower limit, and the space is vacated by the light-transmitting inlet 7 for injecting light-transmitting material to the light-emitting area 5.

[0022] The method for processing automotive light-emitting injection molded parts using the aforementioned injection molding equipment includes the following steps:

[0023] A. First, the lower mold 2 is moved upward to its upper limit by the power device 4. At this time, the protrusion 2-2 is in contact with the upper mold 1, occupying the light-emitting area of ​​the automotive light-emitting injection molded part. Then, black opaque material is introduced through the shielded injection port 6 to perform injection molding of the shielded area. At this time, the light-transmitting injection port 7 is in a sealed state. The light-emitting area 5 is a circle with a boundary. With the protrusion 2-2 in contact with the upper mold 1, the black opaque material enters the next non-light-emitting area through both sides of the protrusion 2-2 for injection molding.

[0024] B. After the shielded area in step A is injection molded, the lower mold 2 is moved downward to the lower limit by the power device 4, and then the light-transmitting material is introduced from the light-transmitting injection port 7 to inject the light-emitting area 5.

[0025] As described above, compared with the existing automotive light-emitting injection molding process, this embodiment reduces the removal process of the material covering the light-emitting area. That is, it does not require an additional processing step to remove the black opaque material in the light-emitting area after injection molding, thereby improving production efficiency and solving the problems existing in the existing automotive light-emitting injection molding process as described above.

[0026] A more specific technical solution could be: the power unit is located at the bottom of the injection molding device and is used to drive the lower mold 2 to move up and down, while the power unit 4 can be a hydraulic cylinder or other mechanism.

[0027] like Figure 2 The shielded inlet 6 shown can be located at the upper end of the injection cavity 3, and the light-transmitting inlet 7 is located at the lower end of the injection cavity 3.

[0028] In addition, the shielding gate 6 can also be located at the lower end of the injection cavity 3, while the light-transmitting gate 7 can be located at the upper end of the injection cavity 3.

[0029] It should be noted that the above embodiments are used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for processing automotive light-emitting injection molded parts, characterized in that: The process is performed using an injection molding device, which includes an injection cavity composed of an upper mold and a lower mold arranged at an angle, and a power device for driving the lower mold to move up and down. The lower mold has a groove, and the groove has a protrusion corresponding to the light-emitting area of ​​the automotive light-emitting injection molded part. The injection cavity has a shielding gate for introducing black opaque material and a light-transmitting gate for introducing light-transmitting material. When the lower mold moves upward to its upper limit, the protrusion fits into the upper mold. The method for processing automotive light-emitting injection molded parts using the aforementioned injection molding equipment includes the following steps: A. First, the lower mold is moved upward to its upper limit by the power device, and the protrusion is attached to the upper mold, occupying the light-emitting area of ​​the automotive light-emitting injection molded part. Then, black opaque material is introduced through the shielded injection port to inject into the shielded area, while the light-transmitting injection port is in a sealed state. The light-emitting area is a circle with boundaries. With the protrusion attached to the upper mold, the black opaque material enters the next non-light-emitting area through both sides of the protrusion for injection. B. After the shielding area described in step A above has been injection molded, the lower mold is moved downward to its lower limit by the power device, and then the light-transmitting material is introduced from the light-transmitting inlet to inject the light-emitting area.

2. The processing method for automotive light-emitting injection molded parts according to claim 1, characterized in that: The power unit is located at the bottom of the injection molding device.

3. The processing method for automotive light-emitting injection molded parts according to claim 1, characterized in that: The shielded injection port is located at the upper end of the injection cavity, and the light-transmitting injection port is located at the lower end of the injection cavity.

4. The processing method for automotive light-emitting injection molded parts according to claim 2, characterized in that: The shielded injection port is located at the lower end of the injection cavity, and the light-transmitting injection port is located at the upper end of the injection cavity.

5. The processing method for automotive light-emitting injection molded parts according to claim 1, 2, 3, or 4, characterized in that: The power unit is a hydraulic cylinder.

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