Injection mould product ejection apparatus and method

Patent metadata

Field	Value
Publication number	US-9505157-B2
Application number	US-201114002209-A
Country	US
Kind code	B2
Filing date	Mar 30, 2011
Priority date	Mar 30, 2011
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

An injection mold product ejection apparatus comprising: an ejection element; and a displacing member for displacing the ejection element between a retracted molding position and a first extended ejection position; wherein, the ejection element is an ejection assembly and comprises: a) an inner ejection sub-assembly, and b) an outer ejection bush surrounding the inner ejection sub-assembly, said displacing member comprises: a collective displacing member, for displacing the whole ejection assembly from the retracted molding position to an intermediate ejection position, and a sub-assembly displacing member, for converting the ejection assembly from the intermediate ejection position to the first extended ejection position by extending the sub-assembly relative to the outer ejection bush.

First claim

The invention claimed is:

1. An injection mould product ejection apparatus comprising:
an ejection element; and
a displacing member for displacing the ejection element between a retracted moulding position and a first extended ejection position;
wherein:
the ejection element is an ejection assembly and comprises:
a) an inner ejection sub-assembly,
b) an outer ejection bush surrounding the inner ejection sub-assembly, and
c) an outer surface forming a moulding die for shaping the injection mould product,
said displacing member comprises:
a) a collective displacing member, for displacing the whole ejection assembly from the retracted moulding position to an intermediate ejection position, and
b) a sub-assembly displacing member, for converting the ejection assembly from the intermediate ejection position to the first extended ejection position by extending the sub-assembly relative to the outer ejection bush,
wherein the sub-assembly displacing member comprises:
a driving member for extending the sub-assembly relative to the outer ejection bush,
a connecting member for connecting the sub-assembly with the driving member and transmitting the driving force from the driving member to the sub-assembly,
a lock for locking the sub-assembly in the retracted position, and
a limit stop for limiting the extension of the sub-assembly.

2. The apparatus of claim 1 , wherein the ejection sub-assembly has a central ejection stud and an intermediate ejection sleeve surrounding the central ejection stud.

3. The apparatus of claim 2 , wherein the displacing member further comprises a stud displacing member, for further converting the ejection assembly from the first extended ejection position to a second extended ejection position by extending the central ejection stud relative to the intermediate ejection sleeve.

4. The apparatus of claim 3 , wherein the stud displacing member comprises a guiding cavity and a limit stop for the central ejection stud inside the intermediate ejection sleeve.

5. The apparatus of claim 1 , wherein the collective displacing member comprises guiding elements and a limit stop for the outer ejection bush.

6. The apparatus of claim 1 , wherein the driving member is a spring, and in particular a coil spring.

7. The apparatus of claim 1 , wherein the connecting member comprises a sliding rod, one end of the sliding rod being connected to the sub-assembly, and the other end being connected to the driving member.

8. The apparatus of claim 6 in combination, further comprising a clamping plate, the sliding rod having a spring housing slidably located inside a cavity of the clamping plate, the spring being located inside the spring housing and urging the spring housing towards the outside of the clamping plate, and the limit stop comprising an annular protruding step of the spring housing and a complementary projecting step of the clamping plate cavity.

9. The apparatus of claim 1 , wherein the lock comprises a sliding carriage adapted to be engaged and disengaged from the connecting member, and a driving assembly for engaging and disengaging the sliding carriage.

10. The apparatus of claim 9 , wherein the driving assembly comprises:
a moving ejection plate carrying the sliding carriage; and
a fixed cam member,
the sliding carriage being adapted for following the cam surface defined by the fixed cam member.

Assignees

• Liesen Martin
• Faurecia Innenraum Systeme Gmbh

Inventors

• Liesen Martin

Classifications

• B29C2045/4057

  the ejecting surface being large with regard to the surface of the article · CPC title

• B29C2045/4063

  preventing damage to articles caused by the ejector · CPC title

• B29C45/401 Primary

  Ejector pin constructions or mountings · CPC title

• B29C45/40 Primary

  Removing or ejecting moulded articles · CPC title