Weight compensated molding machine

Patent metadata

Field	Value
Publication number	US-9931775-B2
Application number	US-201414782945-A
Country	US
Kind code	B2
Filing date	Mar 3, 2014
Priority date	—
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

Wings are provided on mold components and linear ways are provided below these wings. A pad rides on each linear way below each wing. A force generator, such as a spring, is disposed between each wing and underlying pad. In this way the weight of the mold components is borne, at least in part, by the linear ways so that the weight on components that might otherwise sag is lessened.

First claim

What is claimed is:

1. A mold assembly for use in a molding machine comprising:
an ejector box having a plurality of guides, said ejector box defining at least one ejector box linear way;
a cassette having at least one cassette plate extending within said ejector box and supported on said guides, each cassette plate for supporting a mold piece, each cassette plate having at least one cassette plate support member extending over one said ejector box linear way;
at least one pad riding on each said ejector box linear way such that there is a pad below each cassette plate support member; and
a force generator disposed between said cassette plate support member and said pad below said cassette plate support member.

2. The mold assembly of claim 1 wherein said at least one ejector box linear way comprises a first ejector box linear way at a first side of said ejector box and a second ejector box linear way at a second side of said ejector box and wherein said at least one cassette plate support member comprises a pair of wings projecting from opposed sides of said each cassette plate.

3. The mold assembly of claim 2 wherein each said force generator is a spring.

4. The mold assembly of claim 3 wherein an outer end of each wing of said pair of wings defines a spring cavity for receiving one said spring.

5. The mold assembly of claim 4 wherein one of said outer end of each wing and each pad below said outer end of each wing defines a key and another of said outer end of each wing and said pad below said outer end of each wing defines a keyway such that any given wing is free to move toward and away from a given pad below said given wing and said given pad is constrained to move along said linear way with said given wing.

6. The mold assembly of claim 5 wherein said key comprises outer faces of said outer end of said wing and said keyway comprises upstanding arms of each said pad.

7. The mold assembly of claim 2 wherein said ejector box has a pair of ejector box wings with at least one spring cavity at an outer end of each of said ejector box wings.

8. A molding machine comprising:
a bed having a first linear way and a second linear way;
a moveable platen moveably supported on said bed;
a fixed platen fixed to said bed;
an ejector box affixed to said moveable platen, said ejector box having a first wing and an opposed second wing;
a first pad riding on said first linear way and a second pad riding on said second linear way;
an outer end of said first wing disposed above said first pad and an outer end of said second wing disposed above said second pad;
at least one spring disposed between said outer end of said first wing and said first pad and at least one spring disposed between said outer end of said second wing and said second pad;
one of said outer end of said first wing and said first pad providing a key and another of said outer end of said first wing and said first pad providing a keyway so that said first wing may move upwardly away from first pad and said first pad is constrained to move along said first linear way with said first wing;
one of said outer end of said second wing and said second pad providing a key and another of said outer end of said second wing and said second pad providing a keyway so that said second wing may move upwardly away from second pad and said second pad is constrained to move along said second linear way with said second wing.

9. The molding machine of claim 8 wherein said outer end of said first wing comprises at least one first wing cavity, each of said at least one first wing cavity for containing one spring and wherein said outer end of said second wing comprises at least one second wing cavity, each of said at least one second wing cavity for containing one spring.

10. The molding machine of claim 9 wherein one said keyway comprises a bore in said first pad and one said key comprises a pin extending through said first wing cavity and into said bore of said first pad.

11. A molding machine comprising:
a suspended component having a first wing and an opposed second wing projecting outwardly from opposed sides of said suspended component;
a first linear way provided below said first wing;
a second linear way provided below said second wing;
a first pad slidably received on said first linear way below said first wing;
a second pad slidably received on said second linear way below said second wing;
a force generator disposed between said first wing and said first pad; and
a force generator disposed between said second wing and said second pad.

12. The molding machine of claim 11 wherein:
said suspended component is a first suspended component and said first suspended component has a first suspended component first linear way and a first suspended component second linear way and further comprising:
a second suspended component having a second suspended component first wing and an opposed second suspended component second wing projecting outwardly from opposed sides of said second suspended component over respective ones of said first suspended component first linear way and said first suspended component second linear way;
a third pad slidably received on said first suspended component first linear way below said second suspended component first wing;
a fourth pad slidably received on said first suspended component second linear way below said second suspended component second wing;
a force generator disposed between said second suspended component first wing and said third pad; and
a force generator disposed between said second suspended component second wing and said fourth pad.

13. The molding machine of claim 11 wherein one of said first wing and said first pad defines a key and another of said first wing and said first pad defines a keyway such that said first wing is free to move toward and away from said first pad and said first pad is constrained to move along said first linear way with said first wing.

14. The molding machine of claim 12 wherein each said force generator is a spring.

15. The mold machine of claim 14 wherein said first wing defines a spring cavity for receiving one said spring and wherein said second wing defines a spring cavity for receiving one said spring.

16. The mold machine of claim 13 wherein said key comprises outer faces of said first wing and said keyway comprises upstanding arms of said first pad.

Assignees

• Husky Injection Molding Systems Ltd

Inventors

• Kintzinger Rainer
• Halter Christophe
• Glaesener Pierre

Classifications

• B29C45/4005

  Ejector constructions; Ejector operating mechanisms (B29C45/44 takes precedence) · CPC title

• B29C45/1742

  Mounting of moulds; Mould supports (mounting of exchangeable mould inserts B29C45/2675) · CPC title

• B29C45/2675

  Mounting of exchangeable mould inserts · CPC title

• B29C2045/4052

  Ejector boxes · CPC title

• B29C45/2602 Primary

  Mould construction elements · CPC title