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Mold for machining internal thread of plastic part and pulling core

A technology for internal threads and plastic parts, applied in the field of plastic molds, can solve the problems that the thread head and the thread tail cannot always be in the same position, the thread insert does not have a core limit structure, and the product does not meet the standard requirements. Improved demolding efficiency, reduced demolding time, and strong practicability

Pending Publication Date: 2021-02-12
海宁鐵三角科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are more or less defects in the existing internal thread demoulding structure, such as the following points: 1. In the process of driving the automatic demoulding push plate by the oil cylinder, due to the large friction force, it is easy to be injured and burned. 2. Since there is no limit on the circumference of the plastic product on the mold, when the plastic part is separated from the mold, the rotation of the mold will cause the plastic product to follow the rotation, resulting in that the demolded product cannot reach Standard requirements; 3. Threaded inserts do not have a core-entry limit structure, and the thread head and tail of the processed product cannot always be in the same position

Method used

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  • Mold for machining internal thread of plastic part and pulling core
  • Mold for machining internal thread of plastic part and pulling core
  • Mold for machining internal thread of plastic part and pulling core

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Embodiment Construction

[0037]In order to facilitate those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The following are only exemplary and do not limit the protection scope of the present invention.

[0038] like Figure 3-7 As shown, the mold for processing the internal thread of plastic parts and the core-pulling mold described in this embodiment includes a fixed mold and a movable mold that are in the shape of a cuboid as a whole. A cylinder motor 43 is fixed on the movable mold. A first motor gear 45 is fixed on the output shaft. The end of the fixed mold close to the movable mold is provided with a cavity 4, the end of the movable mold close to the fixed mold is provided with a core 5 that matches the cavity, and the fixed mold is provided with a nozzle hole 16 and a flow channel 15. Specifically, the fixed mold includes a fixed mold fixing p...

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PUM

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Abstract

The invention discloses a mold for machining an internal thread of a plastic part and pulling a core. The mold comprises a fixed mold body, a movable mold body and an oil cylinder motor, a first motorgear is fixed to an output shaft of the oil cylinder motor, a transmission mechanism is arranged in the movable mold body and comprises a rotating shaft, a first insert gear and n second insert gears, the first insert gear is fixed to one end of the rotating shaft, a second motor gear is fixed to the other end of the rotating shaft, an anti-strain mechanism is further arranged in the movable moldbody and comprises n anti-rotation inserts, a hole site insert is arranged in each anti-rotation insert, one end of each hole site insert is fixed to the corresponding second insert gear, a thread insert is fixed to the other end of each hole site insert, the thread inserts penetrate through a mold core to be movably arranged in a mold cavity to be used for shaping the plastic part with the internal thread, and the rotating shaft is driven by driving force provided by the oil cylinder motor to rotate so as to drive the thread inserts to rotate. The mold has the advantages that strain and burn-out cannot be caused, and the generation of burrs of the mold is avoided; and a thread head and a thread tail of the thread are located at the unified position through a core-in limiting mechanism.

Description

technical field [0001] The invention relates to the technical field of plastic molds, in particular to a mold for processing internal threads and core pulling of plastic parts. Background technique [0002] Plastic molding is the most common method in plastic processing. As one of the tools for plastic molding, plastic injection molds affect the quality, output and cost of products in terms of quality, precision manufacturing cycle and production efficiency of the injection process. The upgrading of products has higher requirements on the level of mold design. Great progress has been made in precision plastic molds, and the plastic parts produced by the molds are slowly maturing. [0003] At present, there are various types of internal thread release in the mold industry. The main structure basically includes a strong release structure, a motor-driven structure, a manually twisted thread insert structure, an oil cylinder rotation structure, and a sloping top structure. Gen...

Claims

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Application Information

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IPC IPC(8): B29C45/33B29C45/26B29C45/27B29C45/40B29C45/36B29L1/00
CPCB29C45/2602B29C45/2708B29C45/332B29C45/36B29C45/401B29C2045/363B29L2001/00
Inventor 杨经亮王群浩
Owner 海宁鐵三角科技有限公司
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