Metal plastic compound screw cap

A technology of metal plastics and nuts, which is applied in the direction of nuts, threaded fasteners, connecting components, etc., can solve the problems of cost reduction, stress corrosion cracking of nuts, etc., and achieve the effect of reducing processing time and avoiding stress corrosion cracking

Inactive Publication Date: 2008-08-20
杨光磊 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the nuts fastened to the connecting pipelines of the indoor and outdoor units of the split air conditioner are prone to stress corrosion cracking, the present invention provides a metal-plastic composite nut, which can not only avoid the problem of stress corrosion cracking, but also can significant cost reduction

Method used

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  • Metal plastic compound screw cap
  • Metal plastic compound screw cap
  • Metal plastic compound screw cap

Examples

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Embodiment Construction

[0016] as attached figure 1 , 2 As shown in and 3, the metal-plastic composite nut includes an insert 1 made of lead brass, the inner surface of the insert 1 is provided with threads, and the inner surface of one end of the insert 1 is provided with a thickness of 1.5-2mm and an angle It is a 45° tapered sealing surface 2, and the outer surface of the insert 1 is uniformly provided with three clip fins 3, each clip fin has a thickness of 1-1.5 mm, and the outside of the insert 1 is wrapped with composite engineering plastics Plastic layer 4, the tensile and flexural modulus of the composite engineering plastic is greater than 10,000Mpa, and can also resist ultraviolet radiation. The main components of the composite engineering plastic are nylon and glass fiber.

[0017] The insert 1 and the plastic layer 4 are integrally injection-molded, and the presence of the snap fin 3 makes the insert 1 and the plastic layer 4 tightly bonded together to prevent falling off.

[0018] The...

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Abstract

The invention discloses a metal plastic composite screw cap, belonging to the connecting part field. The metal plastic composite screw cap comprises a metal insert; the internal surface of the metal insert is provided with a thread; the external surface of the metal insert is provided with a clamping fin; a plastic layer is covered outside the metal insert. The metal plastic composite screw cap can avoid the problems of stress corrosion and crack and can obviously reduce cost.

Description

technical field [0001] The invention relates to a nut used for connection and fastening, which is used for fastening the connecting pipelines of indoor and outdoor units of a split-type air conditioner. Background technique [0002] At present, the nuts that the known split-type air conditioner indoor and outdoor unit connecting pipelines are fastened are made of lead brass (HPb59-1). The nuts fasten the connecting pipes of the indoor and outdoor units to ensure that the refrigerant does not leak. However, lead brass has a relatively serious tendency of stress corrosion cracking. When there are corrosive conditions in the external environment (such as acids, alkalis, and salts in the air), the nuts are easily cracked because they are under stress conditions. , causing refrigerant leakage, thus making the air conditioner ineffective. At present, most of the solutions to this problem are to increase the wall thickness of the nut, which will lead to an increase in cost. Con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B37/00F16L19/00
Inventor 杨光磊
Owner 杨光磊
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