Plastic thread element and connection assembly consisting of a plastic carrier part and a plastic thread part

A technology of threaded elements and supporting components, applied in the direction of connecting components, threaded fasteners, screws, etc.

Active Publication Date: 2018-12-21
BOLLHOFF VERBINDUNGSTECHNIK GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this configuration has the disadvantage that the screwing-in torque is higher than the loosening torque due to the cutting edge in the screwing-in direction

Method used

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  • Plastic thread element and connection assembly consisting of a plastic carrier part and a plastic thread part
  • Plastic thread element and connection assembly consisting of a plastic carrier part and a plastic thread part
  • Plastic thread element and connection assembly consisting of a plastic carrier part and a plastic thread part

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Experimental program
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Embodiment Construction

[0032] A preferred embodiment of the inventive threaded element in the form of a screw 1 made of plastic is in Figure 1A shown in . Preferably, the threaded element can also be realized as a screw insert or threaded insert 2 made of plastic, such as Figure 1B shown.

[0033] According to the invention, the external thread 5 of the plastic screw 1 or plastic insert 2 is preferably configured such that when inserted into the receiving opening of the support part, it optimally forms a reverse thread on the inner wall of the receiving opening. The reverse thread can be formed by a cutting process or by material deformation or by a combination of the above two processes.

[0034] A preferred screw 1 according to the invention shown exemplarily in FIG. External thread 5, transition zone 8 between the screw shank 3 and the screw head 7, the drive member at the screw head 7, and the tip 9 at the core of the screw 1 or the end of the screw shank 3 opposite the screw head 7. In the...

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PUM

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Abstract

The invention relates to a thread element made of plastic, a connection assembly formed by a carrier part made of plastic, into which the plastic thread element is screwed by generating a counter thread, and a method for producing the connection and a method for producing the thread element. The thread element is characterised by an axial element, on which the circumferential windings of a threadpath are interrupted by at least two machined grooves. The winding regions created in this way form a cutting bar and a blocking bar, wherein the cutting bar projects radially beyond the blocking bar.

Description

technical field [0001] The invention relates to a threaded element made of plastic, in particular a plastic screw, a plastic screw insert with an internal thread and a plastic thread insert; a connection assembly comprising a a plastic support part in which a threaded element has been screwed in and at the same time forms a thread in a self-acting manner; and a method of manufacturing said connection assembly from at least one said plastic support part and said threaded element made of plastic; And a method of manufacturing a threaded element. Background technique [0002] The aforementioned connection assemblies are known in the prior art, which comprise at least one support part made of plastic and a plastic threaded element in the form of a screw or a collar with a self-forming external thread. They are described, for example, in DE 2 047 482 A1, US 4,637,767, US 5,921,735, US 5,385,439 and DE 10 2004 021 484 A1. [0003] US 5,385,439 describes a screw having an externa...

Claims

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Application Information

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IPC IPC(8): F16B25/00
CPCF16B25/0052F16B25/0015F16B25/00
Inventor亚历山大·沃德威斯
OwnerBOLLHOFF VERBINDUNGSTECHNIK GMBH