Mold assembly for injection molding flat-type heat sinks

Details Mold assembly for injection molding flat-type heat sinks Mold assembly for injection molding flat-type heat sinks

1999-01-19

2001-03-06

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

C264S272150, C264S272170

Reexamination Certificate

active

06196821

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention is related to a mold assembly for injection-molding flat-type heat sinks.
It has been found that electronic devices such as power supplies are usually sealed within a casing thereby causing problems in cooling the electronic devices. Hence, it is proposed to provide a metal heat sink within the casing.
Most of such heat sinks are generally U-shaped in cross section and partly covered with plastic. As shown in
FIG. 1
, the metal heat sink
12
is disposed between the male mold
10
and the female mold
11
between which there is a clearance (a) which will cause difficulties in engaging the male mold
10
and the female mold
11
thereby easily causing damage to the molds. Hence, it has been proposed to engage the male mold
10
with the female mold
11
closely without the clearance (a). However, there will be a negative clearance (b) and the plastic will be excessively squeezed to cover the portion (c) which is designed to be not covered by plastic, thereby making it unfit for practical use.
Therefore, it is an object of the present invention to provide a mold assembly for injection-molding flat-type heat sinks which can accurately injection-mold a covering for a flat-type heat sink without causing damage to the mold assembly.


REFERENCES:
patent: 4470786 (1984-09-01), Sano et al.
patent: 5766650 (1998-06-01), Peters et al.
patent: 5776512 (1998-07-01), Weber
patent: 5989471 (1999-11-01), Lian et al.
patent: 6030569 (2000-02-01), Yu
patent: 287859 (1998-10-01), None

Affiliated with

Also associated with

Rating

Mold assembly for injection molding flat-type heat sinks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mold assembly for injection molding flat-type heat sinks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mold assembly for injection molding flat-type heat sinks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2444525