CN-224224462-U - No weld line switch panel injection mold

Abstract

The utility model discloses an injection mold for a switch panel without a welding line, and belongs to the technical field of injection molds. The mold comprises an upper mold, a lower mold, an upper mold core, a lower mold core and a heating pipeline, wherein the upper mold core and the lower mold core form a product mold cavity, and a heating water well is arranged on the back surface of the upper mold core at a through hole for molding a product. The heating water well is divided into a left heating chamber and a right heating chamber by a sealing partition board, through one end gap, both ends are connected with the inlet and outlet of the heating pipeline. The structure design can accurately and locally heat the area near the through hole of the product, effectively improve the temperature field of the plastic melt and reduce the welding line caused by uneven temperature. Meanwhile, the unique heating water well structure increases the flow path of the heating medium, ensures good fusion of the melt, fundamentally solves the problem of welding lines near the through holes, and remarkably improves the appearance quality of the product. In addition, because the welding lines are reduced, the product has more compact and uniform internal structure in the area near the through hole, the mechanical properties such as strength, toughness and the like are enhanced, and the whole service life and reliability of the product are prolonged.

Inventors

• LI TONG
• WAN YUNGANG

Assignees

• 乐清瑞风精密模具有限公司

Dates

Publication Date

20260512

Application Date

20250530

Claims (6)

1. 1. The utility model provides a no weld line switch panel injection mold, includes mould, lower mould, goes up mould benevolence and lower mould benevolence and heating pipeline, go up and form the die cavity that is used for the shaping product between mould benevolence and the lower mould benevolence, wherein the last mould benevolence back that is used for the through-hole department of shaping product is provided with the heating well, be provided with in the heating well and separate into left heating chamber and right heating chamber through the sealing baffle, sealing baffle's one end is provided with the breach that is used for carrying out intercommunication with left heating chamber and right heating chamber, the both ends of heating well have the import and export that are connected with the entrance point and the exit end of heating pipeline.
2. 2. The weld line-free switch panel injection mold of claim 1, wherein the heating well is of an oval-shaped structure.
3. 3. The injection mold of the weld line-free switch panel of claim 1, wherein a positioning notch is formed at one end of the heating water well, and a positioning projection which is clamped into the positioning notch is formed at one end of the sealing partition plate.
4. 4. The weld line-free switch panel injection mold of claim 1, wherein the bottom of the mold cavity of the upper mold core is provided with a protrusion for forming a through hole of a product.
5. 5. The fusion-wire-free switch panel injection mold of claim 1, wherein the heating water well has a coverage area greater than 50% of the area of the through hole.
6. 6. The weld line-free switch panel injection mold of claim 1, wherein a circle of sealing rings is arranged on the outer ring of the heating water well.

Description

No weld line switch panel injection mold Technical Field The utility model relates to the technical field of injection molds, in particular to an injection mold for a switch panel without a welding line. Background In the field of injection molding, there are challenges in the manufacture of products with via structures. Especially when producing products such as switch panels that require very high quality to the outside, conventional injection molds expose significant drawbacks. In general, in the process of molding a product with a through hole, when a plastic melt flows through the through hole area, a welding line is easily generated near the through hole due to the change of the flow direction of the melt and the uneven distribution of a temperature field. The welding lines not only seriously affect the appearance quality of the product and reduce the aesthetic degree of the product, but also weaken the mechanical properties of the product in the area to a certain extent, such as strength, toughness and the like, thereby affecting the whole service life and reliability of the product. In order to solve the above problems, various attempts have been made in the industry, such as adjusting injection process parameters, optimizing mold gate positions, etc., but the effects are not ideal. Therefore, the development of the injection mold capable of effectively solving the problem of the welding line near the through hole has important practical significance and urgency. Under the background, the patent provides an injection mold for a switch panel without a welding line, and aims to fundamentally improve the molding quality of a product in a through hole area through innovative structural design. Disclosure of utility model The utility model provides an injection mold for a switch panel without a welding line, aiming at the defects in the background technology. The technical scheme includes that the injection mold for the weld line-free switch panel comprises an upper mold, a lower mold, an upper mold core, a lower mold core and a heating pipeline, wherein a mold cavity for molding a product is formed between the upper mold core and the lower mold core, a heating water well is arranged on the back surface of the upper mold core at a through hole for molding the product, the heating water well is internally provided with a left heating chamber and a right heating chamber which are separated by a sealing partition plate, one end of the sealing partition plate is provided with a notch for communicating the left heating chamber with the right heating chamber, and two ends of the heating water well are provided with inlets and outlets which are connected with an inlet end and an outlet end of the heating pipeline. Furthermore, the heating water well is of an oval structure. Furthermore, one end of the heating water well is provided with a positioning notch, and one end of the sealing partition plate is provided with a positioning lug which is clamped into the positioning notch. Further, a bulge for forming a through hole of a product is arranged at the bottom of the die cavity of the upper die core. Further, the coverage area of the heating water well is larger than 50% of the area of the through hole. Further, a circle of sealing rings are arranged on the outer ring of the heating water well. The beneficial effects of the utility model are as follows: 1. The application can accurately and locally heat the vicinity of the through hole by arranging the heating water well on the back surface of the upper die core on the back surface of the through hole of the product. When the plastic melt flows through the area, the heat emitted by the heating water well can effectively improve the temperature field of the melt, so that the temperature of the melt is more uniform, and the generation of welding lines caused by temperature difference is greatly reduced. Meanwhile, the sealing partition plate arranged in the heating water well divides the heating water well into the left heating chamber and the right heating chamber and is communicated with the left heating chamber and the right heating chamber through the gaps, and the unique design increases the flow path of a heating medium, so that the area near the through hole can be heated for a longer time and more stably, good fusion of melt in the area is further ensured, the problem of welding lines near the through hole is fundamentally solved, and the appearance quality of a product is remarkably improved. 2. The mechanical property of the product is enhanced, namely, the internal structure of the product in the area near the through hole is more compact and uniform due to the reduction or elimination of the welding line. This results in an effective enhancement of the mechanical properties of the region, such as strength and toughness. Compare the product of traditional injection mold production, the switch panel of this patent production is in the use, more can bear