Asymmetric special-shaped plastic part mold

By designing asymmetrical irregular plastic part molds and using runner plates of different diameters to connect with the cavity, the problem of using two sets of molds in the production of the middle and lower front covers was solved, achieving cost savings and efficiency improvement.

CN223671727UActive Publication Date: 2025-12-16ZUNYI QUNJIAN PLASTIC PROD CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422556573.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2025-12-16
Estimated Expiration
2034-10-22

AI Technical Summary

Technical Problem

In the existing technology, the production of the middle pull-out front cover and the bottom pull-out front cover requires two sets of molds, resulting in high cost and low efficiency, and making it impossible to achieve a symmetrical design on a single mold.

Method used

Design an asymmetric irregular plastic part mold, using runner plates of different diameters connected to the cavity to achieve balanced gating of the two molds, sharing a single mold.

Benefits of technology

This achieves symmetrical arrangement of two irregularly shaped molds within the same mold, reducing production costs and improving production efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223671727U_ABST
    Figure CN223671727U_ABST
Patent Text Reader

Abstract

The utility model discloses an asymmetric special-shaped plastic part mold in the technical field of special-shaped mold forming, which comprises a mold body, a sprue bush arranged at the top end of the mold, and a lower-pulling front cover cavity and a middle-pulling front cover cavity which are respectively positioned at two ends in the mold, the sprue bush is downwards communicated with a main runner plate, two ends of the main runner plate are respectively communicated with branch runner plates, and the branch runner plates are respectively communicated with the middle-pulling front cover cavity and the middle-pulling front cover cavity. The plurality of sub-runner plates are respectively communicated with the lower drawing front cover cavity and the middle drawing cavity front cover, and sub-runners of the plurality of sub-runner plates are different in diameter. Independent hot runner shunting design is adopted, the diameter 14 and the diameter 16 are adopted for controlling the feeding amount according to different weights of products on the pipe diameter design of the hot runners, meanwhile, the sequence valve is adopted for controlling the pouring time, the temperature of the hot runners is controlled through the temperature sensor, and therefore pouring balance of the two products is achieved.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The utility model relates to a special-shaped die forming technical field, concretely relates to a non-symmetrical special-shaped plastic part die. BACKGROUND

[0002] As shown in the accompanying Figure 3 and the accompanying Figure 4 , the middle-pulling front cover and the lower-pulling front cover are two plastic part products with the largest use on the 216 / 218 type refrigerator, because the two plastic parts are non-symmetrical structures, so the sizes are different, and the grammage difference is 50 grams. The traditional design method is to design two sets of molds, and two injection molding machines need to be equipped during production, the injection molding machine investment is large, the labor cost rises, and the market competition is increasingly fierce, the cost increases sharply, how to achieve cost reduction, energy saving and benefit increase becomes the research direction. If the conventional mold design method is adopted, it is impossible to realize the target of combining two molds into one mold, and from the mold design structure, the sizes of the two molds are completely different, and symmetrical design cannot be carried out. UTILITY MODEL CONTENT

[0003] The utility model intends to provide a non-symmetrical special-shaped plastic part die to solve the problems of high cost and low efficiency in the production of the existing middle-pulling front cover and lower-pulling front cover using two sets of molds.

[0004] In order to solve the above technical problems, the utility model provides the following technical scheme: a non-symmetrical special-shaped plastic part die, which comprises a mold body, a sprue bush arranged at the top end of the mold, and a lower-pulling front cover cavity and a middle-pulling front cover cavity arranged at both ends in the mold respectively, the sprue bush is communicated with a main runner plate downward, both ends of the main runner plate are respectively communicated with a distribution runner plate, a plurality of distribution runner plates are respectively communicated with the lower-pulling front cover cavity and the middle-pulling front cover cavity, and the distribution runner diameters of the plurality of distribution runner plates are different.

[0005] Further, the distribution runner diameter of the distribution runner plate communicated with the lower-pulling front cover cavity is 15-17mm, and the distribution runner diameter of the distribution runner plate communicated with the middle-pulling front cover cavity is 13-15mm.

[0006] Further, the distribution runner diameter of the distribution runner plate communicated with the lower-pulling front cover cavity is 16mm, and the distribution runner diameter of the distribution runner plate communicated with the middle-pulling front cover cavity is 14mm.

[0007] Further, the main runner plate and the plurality of distribution runner plates are communicated through a hot nozzle, and the plurality of distribution runner plates and the lower-pulling front cover cavity and the middle-pulling front cover cavity are communicated through the hot nozzle.

[0008] The beneficial effects of this utility model are: 1. It overcomes the difficulties of existing mold symmetry design and symmetrically sets two irregular molds in the same mold; 2. By adjusting the different diameters of the hot runners, the pouring balance of the two molds is achieved; 3. The mold of this utility model saves production costs and achieves the effect of cost reduction, energy saving and efficiency improvement. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an asymmetric irregular plastic part mold according to the present invention;

[0010] Figure 2 This is a schematic diagram of the casting structure of an asymmetric irregular plastic part mold according to the present invention;

[0011] Figure 3 This is a schematic diagram of the center-opening front cover;

[0012] Figure 4 This is a schematic diagram of the pull-down front cover. Detailed Implementation

[0013] The following detailed description illustrates the specific implementation method:

[0014] The reference numerals in the accompanying drawings include: 1. Sprue bushing; 2. Main runner; 3. Hot runner; 4. Diverter runner; 5. Hydraulic cylinder; 6. Middle pull front cover cavity; 7. Lower pull front cover cavity; 8. Mold body.

[0015] The basic implementation examples are as follows: Figure 1 - Appendix Figure 4 As shown: An asymmetric irregular plastic part mold includes a mold body 8, a sprue sleeve 1 set at the top of the mold, and a lower front cover cavity 7 and a middle front cover cavity 6 located at both ends of the mold. The sprue sleeve 1 is connected downward to a main runner plate 2. The two ends of the main runner plate 2 are connected to runner plates 4 through hot nozzles 3. The two runner plates 4 are connected to the lower front cover cavity 7 and the middle front cover cavity 6 through hot nozzles 3 respectively. Both the lower front cover cavity 7 and the middle front cover cavity 6 are fixedly connected to hydraulic cylinders 5. The runner diameter of the runner plate 4 connected to the lower front cover cavity 7 is 16mm, and the runner diameter of the runner plate 4 connected to the middle front cover cavity 6 is 14mm.

Claims

1. A mold for an asymmetrically profiled plastic part, characterized in that: The injection mold comprises a mold body, a sprue bush arranged at the top end of the mold, a lower-pulling front cover cavity and a middle-pulling front cover cavity arranged at two ends in the mold respectively, and the sprue bush is communicated with a main runner plate downward, the two ends of the main runner plate are communicated with a plurality of runner plates respectively, the plurality of runner plates are communicated with the lower-pulling front cover cavity and the middle-pulling front cover cavity respectively, and the diameters of the runner plates of the plurality of runner plates are different.

2. A mold for an asymmetrically profiled plastic part according to claim 1, characterized in that: The diameter of the runner plate of the runner plate communicated with the lower-pulling front cover cavity is 15-17 mm, and the diameter of the runner plate of the runner plate communicated with the middle-pulling front cover cavity is 13-15 mm.

3. A mold for an asymmetrically profiled plastic part according to claim 2, characterized in that: The diameter of the runner plate of the runner plate communicated with the lower-pulling front cover cavity is 16 mm, and the diameter of the runner plate of the runner plate communicated with the middle-pulling front cover cavity is 14 mm.

4. A mold for an asymmetrically profiled plastic part according to claim 3, characterized in that: The main runner plate and the plurality of runner plates are communicated through hot nozzles, and the plurality of runner plates and the lower-pulling front cover cavity and the middle-pulling front cover cavity are communicated through hot nozzles.