Screwdriver handle preparation method and screwdriver

A screwdriver and handle technology, used in the preparation of screwdriver handles and the field of screwdrivers, can solve the problems of lower connection strength between the blade and the handle, lower production quality of screwdrivers, and reduced distance between chains, etc. the effect of strength

Active Publication Date: 2019-08-30
上海欧唯斯工具制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the plastic is in the molten state, the orientation of the molecular chain is small. After molding, the molecular chain returns to its natural state due to the temperature drop, and the distance between the chains is reduced, resulting in shrinkage of the product. Therefore, it is easy to generate a cavity inside the handle, resulting in a The connection strength of the screwdriver becomes lower, which makes the tool holder prone to loosening and reduces the production quality of the screwdriver

Method used

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  • Screwdriver handle preparation method and screwdriver
  • Screwdriver handle preparation method and screwdriver

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] A kind of preparation method of screwdriver handle, refer to figure 1 and figure 2 , including the following steps:

[0039] Step100: Injecting the inner core 300, and the inner core 300 is provided with a channel 600 connecting the cavity 500 and the outside;

[0040] Step200: Place the inner core 300 in a cooling medium for cooling, and the interface of the cooling medium is located under the channel 600;

[0041] Step300: Injecting the outer layer 400 at least once to fill the channel 600 and the cavity 500 .

[0042] Based on Step 100, the inner core 300 is pressed in an injection molding machine at a temperature of 180°C-220°C for 13-17s, and then cooled naturally for 20-25s. In the above steps, the knife rod 200 and the inner core 300 are injection molded at one time, and the knife rod 200 is connected with the inner core 300 when th...

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Abstract

The invention discloses a screwdriver handle preparation method and a screwdriver, and relates to the technical field of hardware tools. The method comprises the steps of 100, an inner core is injection-molded and the inner core is provided with channels for communicating cavities with the outside; 200, the inner core is placed in a cooling medium for cooling, wherein the interface of the coolingmedium is positioned below the channels; and 300, an outer layer is injection-molded at least one time to fill the channels and the cavities. In the process of injection-molding the inner core, the channels which communicate with the cavities are reserved, and then the outer side of the inner core is injection-molded again, so that the channels and the cavities are filled with the outer layer to obtain a solid handle with improved internal strength; and after a cutter bar is connected with the handle, the loosening phenomenon is not easy to occur when the cutter bar applies a force to the handle, so that the production quality of the screwdriver is improved.

Description

technical field [0001] The invention relates to the technical field of hardware tools, more specifically, it relates to a preparation method of a screwdriver handle and a screwdriver. Background technique [0002] A screwdriver is a tool used to turn a screw into place and consists of a handle and a shaft, usually with a thin wedge-shaped head at one end that fits into a slot or notch in the head of the screw. The general handle is formed by one-shot injection molding using an injection molding machine. However, in the process of actual use, once the number of times of use is too high, the tool holder is prone to loosening. [0003] The handle is generally made of plastic. During the injection molding process, the plastic is heated and melted and injected into the mold of the injection molding machine, and then cooled and formed. When the plastic is in the molten state, the orientation of the molecular chain is small. After molding, the molecular chain returns to its natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C45/78B29C45/72B25B15/02
CPCB25B15/02B29C45/14B29C45/14008B29C45/72B29C45/7207B29C45/78
Inventor 董子亮
Owner 上海欧唯斯工具制造有限公司
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