Method of injection sealing gel into a recess of a work piece

Patent metadata

Field	Value
Publication number	US-9586342-B2
Application number	US-201414337747-A
Country	US
Kind code	B2
Filing date	Jul 22, 2014
Priority date	Jul 22, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A method of injecting a sealing gel into a recess of a work piece, comprising steps of: injecting the sealing gel into the recess and stopping the injection of the sealing gel when the sealing gel reaches a first depth less than the total depth of the recess; after the sealing gel has cooled and solidified, continuing the injection of the sealing gel into the recess and stopping the injection of the sealing gel when the sealing gel reaches another depth higher than the first depth; and repeatedly performing the previous step until the cooled and solidified sealing gel in the recess has a top surface beyond a sealing interface surface of the work piece.

First claim

What is claimed is:

1. A method of injecting a sealing gel into a recess of a work piece, comprising steps of:
first, injecting a sealing gel into a recess of a work piece and stopping the injection of the sealing gel when the sealing gel reaches a first depth less than a total depth of the recess;
second, after the sealing gel has cooled and solidified, continuing the injection of the sealing gel into the recess and stopping the injection of the sealing gel when the sealing gel reaches another depth higher than the first depth; and
third, repeatedly performing the second step until the cooled and solidified sealing gel in the recess has a convex top surface extending beyond a sealing interface surface of the work piece and opposing edges of the convex top surface are flush with the sealing interface surface.

2. The method according to claim 1 , wherein the first depth is about ⅓ to ⅘ of the total depth of the recess.

3. The method according to claim 2 , wherein the first depth is about ½ of the total depth of the recess.

4. The method according to claim 2 , wherein the first depth is about ⅔ of the total depth of the recess.

5. The method according to claim 1 , wherein the sealing gel is injected into the recess directly through an opening of the recess.

6. The method according to claim 1 , wherein the sealing gel has a solid state and a fluid state, and wherein the sealing gel is capable of being converted from the solid state to the fluid state by heating and capable of being converted from the fluid state to the solid state by cooling.

7. The method according to claim 6 , wherein the fluid sealing gel is supplied from a gel supply container to a nozzle and injected into the recess through the nozzle.

8. The method according to claim 7 , wherein the gel supply container comprises:
a heater for heating the sealing gel to convert the sealing gel into the fluid state; and
a pump for supplying the fluid sealing gel to the nozzle.

9. The method according to claim 8 , wherein the pump is a speed adjustable pump capable of adjusting the supply speed of the fluid sealing gel.

10. The method according to claim 9 , wherein an additional heater is provided on the nozzle to heat the sealing gel in the nozzle to prevent the sealing gel in the nozzle from being solidified.

11. The method according to claim 10 , wherein the injection of the sealing gel is performed by a multi-freedom robot, and wherein the robot has an end effector on which the nozzle is mounted.

12. The method according to claim 11 , wherein the robot moves the nozzle back and forth along a path defined by the recess, so as to uniformly inject the sealing gel into the recess.

13. The method according to claim 1 , wherein the second step injects approximately half the volume of the sealing gel injected in the first step.

14. The method according to claim 13 , wherein the third and subsequent steps inject approximately half the volume of the sealing gel injected in the prior step.

Assignees

• Tyco Electronics Shanghai Co Ltd
• Tyco Electronics Corp

Inventors

• Shaddock Robert Neil
• Xie Fengchun
• Zhang Dandan
• Hu lvhai

Classifications

• B29C39/40 Primary

  Compensating volume change, e.g. retraction {(in general B29C37/005)} · CPC title

• F16J15/328

  Manufacturing methods specially adapted for elastic sealings (moulding B29C) · CPC title

• B29D99/0053

  Producing sealings (B29D99/0085 takes precedence) · CPC title

• B29C31/041 Primary

  using filling or dispensing heads placed in closed moulds or in contact with mould walls (B29C45/27 takes precedence) · CPC title

• B29C37/005

  Compensating volume or shape change during moulding, in general · CPC title