Moldable wire thread insert, method for its production, component with a moldable wire thread insert as well as a method for its production

Patent metadata

Field	Value
Publication number	US-10005211-B2
Application number	US-201414498337-A
Country	US
Kind code	B2
Filing date	Sep 26, 2014
Priority date	Oct 2, 2009
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A moldable wire thread insert for reinforcing a screw-in opening of a component has the following characteristics: a cylindrical spiral made of a helically, wound wire, the neighboring coils of which are arranged such that a closed cylindrical spiral wall is present, while at least one end of the cylindrical spirals has a fastening flange, which extends radially outwards over the cylindrical spiral wall and with which the wire thread insert is anchorable in the component and/or one end of the cylindrical spiral is designed in a planar manner in order to form an even axial front surface of the cylindrical spiral.

First claim

The invention claimed is:

1. A production method for a moldable wire thread insert for reinforcing a screw-in opening of a component, said method comprising the steps of:
a) helically winding a wire onto a first cylindrical area of a winding spindle into a cylindrical spiral with a diameter such that neighboring coils of the cylindrical spiral have a first slope and form a cylindrical spiral wall, and while helically winding the wire imprinting mechanical tensions into the wire in an axial direction of the wire thread insert so that the neighboring coils are wound on a block after removing the wire thread insert from the winding spindle,
b) after the helically winding step, creating a fastening flange by winding the wire into a second area of the winding spindle, in which the winding spindle expands out of the first cylindrical area radially outwards along an outer shell surface of a cone wherein the outer shell surface extends continuously or gradually,
the fastening flange protruding radially outwards over the cylindrical spiral wall on at least one end of the spiral through winding of at least one coil of the spiral on one end of the spiral with a reduced slope compared to the first slope, in order to create the fastening flange, and
c) winding the fastening flange such that the fastening flange has a greater diameter than the cylindrical spiral, wherein the end of the spiral comprises at least two coils of the wound wire lying above each other in the radial direction of the cylindrical spiral.

2. The production method according to claim 1 , comprising the further step of:
winding the wire onto the winding spindle such that a longitudinal axis of the winding spindle and a wire feed direction of the wire to be wound form an angle β≥90°.

3. The production method according to claim 1 , comprising the further step of:
advancing the winding spindle and the wire to be fed relative to each other with different speeds during the winding of the wire onto the first and the second area of the winding spindle.

4. The production method according to claim 1 , comprising the further step of:
removing the cylindrical spiral with the fastening flange as wound onto the winding spindle from the winding spindle such that neighboring windings of the spiral and the fastening flange rest against each other.

5. The production method according to claim 1 , comprising the further step of:
hooking the wire to be wound into a notch of the winding spindle and creating a radially inwards sticking tang on the end of the spiral facing away from the flange onto the winding spindle through the winding up of the wire.

6. The production method according to claim 1 , comprising the further step of:
creating at least one groove running in an axial direction on a radial outer wall of the spiral by milling.

7. The production method according to claim 1 , wherein a cross-section of said wire comprises a thread area and an anchoring area.

8. A production method for a moldable wire thread insert for reinforcing a screw-in opening of a component, said method comprising the steps of:
a) helically winding a wire onto a first cylindrical area of a winding spindle into a cylindrical spiral with a diameter such that neighboring coils of the cylindrical spiral have a first slope and form a cylindrical spiral wall, and while helically winding the wire imprinting mechanical tensions into the wire in an axial direction of the wire thread insert so that the neighboring coils are wound on a block after removing the wire thread insert from the winding spindle,
b) after the helically winding step, creating a fastening flange by winding the wire into a second area of the winding spindle, in which the winding spindle expands out of the first area of the winding spindle radially outwards forming a ledge compared to the first cylindrical area, and winding the wire against the ledge so that the coils of the fastening flange arrange themselves radially next to each other with partial overlapping in order to form the fastening flange,
the fastening flange protruding radially outwards over the spiral wall on at least one end of the spiral through winding of at least one coil of the spiral on one end of the spiral with a reduced slope compared to the first slope, in order to create the fastening flange, and
c) winding the fastening flange such that the fastening flange has a greater diameter than the cylindrical spiral, wherein the end of the spiral comprises at least two coils of the wound wire lying above each other in the radial direction of the cylindrical spiral.

9. The production method according to claim 8 , comprising the further step of:
winding the wire onto the winding spindle such that a longitudinal axis of the winding spindle and a wire feed direction of the wire to be wound form an angle β≥90°.

10. The production method according to claim 8 , comprising the further step of:
advancing the winding spindle and the wire to be fed relative to each other with different speeds during the winding of the wire onto the first and the second area of the winding spindle.

11. The production method according to claim 8 , comprising the further step of:
removing the cylindrical spiral with the fastening flange as wound onto the winding spindle from the winding spindle such that neighboring windings of the spiral and the fastening flange rest against each other.

12. The production method according to claim 8 , comprising the further step of:
hooking the wire to be wound into a notch of the winding spindle and creating a radially inwards sticking tang on the end of the spiral facing away from the flange onto the winding spindle through the winding up of the wire.

13. The production method according to claim 8 , comprising the further step of:
creating at least one groove running in an axial direction on a radial outer wall of the spiral by milling.

14. The production method according to claim 8 , wherein a cross-section of said wire comprises a thread area and an anchoring area.

Assignees

• Grubert Klaus Friedrich
• Stumpf Michael
• Sutz Xavier
• Rintelmann Jochen
• Boellhoff Verbindungstechnik Gmbh

Inventors

• Grubert Klaus Friedrich
• Stumpf Michael
• Sutz Xavier
• Rintelmann Jochen

Classifications

• B29L2009/005

  coated · CPC title

• B65H54/00

  Winding, coiling, or depositing filamentary material (cores, formers, holders, cans or receptacles B65H75/02) · CPC title

• B29C45/14549

  Coating rod-like, wire-like or belt-like articles (B29C45/14426 takes precedence) · CPC title

• B29C45/14065 Primary

  Positioning or centering articles in the mould · CPC title

• B21F3/04

  externally on a mandrel or the like · CPC title