Low constant pressure injection molding system with variable-position molding cavities

Patent metadata

Field	Value
Publication number	US-9364977-B2
Application number	US-201414275944-A
Country	US
Kind code	B2
Filing date	May 13, 2014
Priority date	May 13, 2013
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A variable-position mold system with a plurality of injection systems operable to deliver molten material at a substantially constant pressure of between about 6.89 megapascals (1,000 psi) and about 103.42 megapascals (15,000 psi) to a set of mold cavities of at least one multi-cavity injection mold insert when in fluid communication therewith. The multi-cavity injection mold inserts have a thermal conductivity of greater than 30 BTU/HR FT ° F., and have little or no cooling channels therein.

First claim

What is claimed is:

1. An injection molding system comprising:
at least one multi-cavity injection mold insert made of a metal having a thermal conductivity of more than 30 BTU/HR FT ° F.;
a first injection system operable to deliver molten material at a substantially constant pressure of between about 6.89 megapascals (1,000 psi) and about 103.42 megapascals (15,000 psi) to a set of mold cavities of the at least one multi-cavity injection mold insert when in fluid communication therewith;
a second injection system operable to deliver molten material at a substantially constant pressure of between about 6.89 megapascals (1,000 psi) and about 103.42 megapascals (15,000 psi) to the set of mold cavities of the at least one multi-cavity injection mold insert when in fluid communication therewith;
a variable-position section to which a multi-cavity injection mold insert is secured, the variable-position section operable to position the set of mold cavities of the at least one multi-cavity injection mold insert into fluid communication with the first injection system when in a first orientation and to position the set of the at least one multi-cavity injection mold insert into fluid communication with the second injection system when in a second orientation; and
a cooling system that is entirely confined within the variable position section and does not extend into any multi-cavity injection mold inserts of the variable position section.

2. The injection molding system of claim 1 , further comprising a third injection system operable to deliver molten material at a substantially constant pressure of between about 6.89 megapascals (1,000 psi) and about 103.42 megapascals (15,000 psi) to the set of mold cavities of the at least one multi-cavity injection mold insert when in fluid communication therewith.

3. The injection molding system of claim 1 , wherein the variable-position section is rotatable about a horizontal axis.

4. The injection molding system of claim 1 , wherein the variable-position section is a rotatable central section of a cube mold rotatable about a vertical axis.

5. The injection molding system of claim 4 , including a plurality of the multi-cavity injection mold inserts, each of the multi-cavity injection mold inserts being secured to a distinct face of the cube mold, with the set of mold cavities in one of the multi-cavity injection mold inserts on one of the faces of the cube mold being in fluid communication with the first injection system while a set of mold cavities in another of the multi-cavity injection mold inserts on another one of the faces of the cube mold is in fluid communication with the second injection system.

6. The injection molding system of claim 5 , wherein the first and second injection systems are axially aligned with one another.

7. The injection molding system of claim 6 , further comprising a third injection system operable to deliver molten material at a substantially constant pressure of between about 6.89 megapascals (1,000 psi) and about 103.42 megapascals (15,000 psi) to the set of mold cavities of the at least one multi-cavity injection mold insert when in fluid communication therewith, the third injection molding system being orthogonal to the first and second injection systems.

8. The injection molding system of claim 1 , wherein the cooling system includes an evaporative cooling system.

9. The injection molding system of claim 1 , wherein the variable-position section is operable to position the set of mold cavities to any desired number of orientations.

Assignees

• Procter & Gamble
• Imflux Inc

Inventors

• Altonen Gene Michael

Classifications

• B29C45/73

  of the mould {(B29C45/2642 and B29C45/2737 take precedence)} · CPC title

• B29C45/77

  of velocity or pressure of moulding material · CPC title

• B29C45/7312

  Construction of heating or cooling fluid flow channels · CPC title

• B29K2995/0013

  Conductive · CPC title

• B29C45/045 Primary

  mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction · CPC title