Mould tool for injection moulding

Patent metadata

Field	Value
Publication number	US-10759105-B2
Application number	US-201515309766-A
Country	US
Kind code	B2
Filing date	May 28, 2015
Priority date	May 28, 2014
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

Injection-moulding mould configured for being mounted in an injection-moulding apparatus for automated moulding of work pieces from plastics, said injection-moulding mould comprising at least two separate mould parts that are separated by a mould separation face, and wherein at least one mould part 1 is configured with an outer frame 2 in which one or more spaces is/are configured that are open relative to the mould separation face, in which is mounted at least one exchangeable mould insert 3 , and wherein the exchangeable mould insert 3 has a mould cavity side that faces towards the mould separation face, which mould cavity side is provided with one or more mould cavities, and wherein, in the mould insert 3 , a set of cooling channels 14 is provided and at least two pipe couplings to which there is, for each pipe coupling, configured a cooling pipe 4 being, with its first end, mounted to the pipe coupling and extending therefrom, in its longitudinal direction, from the pipe coupling and out through a channel 8 in the outer frame of the mould part and to its other end. The cooling pipe being secured in the channel in such a manner that it cannot be shifted in the longitudinal direction thereof, it is accomplished that the pipe coupling may be configured such as to occupy only very little space in the mould insert 3.

First claim

The invention claimed is:

1. An injection-moulding mould configured for being mounted in an injection-moulding apparatus for automated moulding of work pieces from plastics, the injection-moulding mould comprising:
a male mould part and a female mould part;
wherein the male mould part comprises:
an outer frame configured to mount to a mould insert,
one or more cooling channels,
a cooling pipe extending through the one or more cooling channels and connected to at least one pipe coupling at one end thereof; and
a ring-shaped mounting clip extending around the cooling pipe and being securely mounted on the inner side of the one or more cooling channels, the mounting clip having a number of elastic tongues that extend slantingly inwards from the outer periphery to a first recess on the cooling pipe and in a direction towards the pipe coupling to secure the cooling pipe in the one or more cooling channels such that the cooling pipe can be shifted along its longitudinal axis only if the elastic tongues are caused to disengage from the cooling pipe;

wherein the female mould part comprises:
a pipe end that can be pressed into the one or more cooling channels and shifted on the outside of the cooling pipe in a direction towards the mounting clip, thereby pressing the elastic tongues outwards towards an inner side of the channel such that the elastic tongues are disengaged from the cooling pipe;
an outer pipe that extends on the outside of the pipe end and can be shifted axially longitudinally of same;
a number of balls on the pipe end, wherein each ball can be pushed inward towards the ball seat by shifting the outer pipe in a direction relative to the pipe end, and moved radially outwards and away from its ball seat by shifting the outer pipe in the opposite direction;

wherein the pipe end can be pushed onto the cooling pipe in the channel such that the balls engage with a second recess of the cooling pipe and the elastic tongues on the mounting clip are pushed out of the first recess and away from the cooling pipe so that the cooling pipe can be withdrawn from the channel.

2. An injection-moulding mould according to claim 1 , characterised in that the pipe coupling is constituted by a cylindrical hole in the mould insert, into which hole the cooling pipe is introduced, and wherein, on the first end of the cooling pipe, a first round-going recess is configured on the outer side of the cooling pipe, in which a gasket is provided, which abuts on the inner side of the cylindrical hole on the mould insert.

3. An injection-moulding mould according to claim 1 , wherein each of the elastic tongues has a pin that engages with another round-going recess on the outer side of the cooling pipe to the effect that the cooling pipe can be shifted along its longitudinal axis only if the pins on the elastic tongues are caused to disengage from the other round-going recess on the cooling pipe.

4. An injection-moulding mould according to claim 3 , characterised in that the mounting clip is made from a thermoplastic plastics material.

5. An injection-moulding mould according to claim 3 , wherein the female mould part has, at its opposite end relative to pipe end, a pressure face configured such that pipe end can be pressed into the channel on the outside of the cooling pipe, where it, by shifting past the outer periphery of the mounting clip, presses said elastic tongues outwards towards the inner side of the channel in such a manner that the pins on the elastic tongues are pushed out of a second round-going recess on the cooling pipe.

6. An injection-moulding mould according to claim 5 , wherein the female mould part further comprises a number of holes configured in the pipe end in which one of the balls is provided, wherein a part of the ball's surface extends within the inner side of the pipe end, and wherein the female mould part further comprises an outer pipe that extends on the outside of the pipe end and can be shifted axially longitudinally of same, and wherein there is configured, in the outer pipe, a guide for each ball.

Assignees

• Lego As

Inventors

• Lambæk Jens Stamp

Classifications

• B29C33/0083

  Electrical or fluid connection systems therefor · CPC title

• B29C45/7312 Primary

  Construction of heating or cooling fluid flow channels · CPC title

• B29C45/2675

  Mounting of exchangeable mould inserts · CPC title

• B29C45/70 Primary

  Means for plasticising or homogenising the moulding material or forcing it into the mould, combined with mould opening, closing or clamping devices · CPC title