Extrusion machine

Patent metadata

Field	Value
Publication number	US-10279529-B2
Application number	US-201415119529-A
Country	US
Kind code	B2
Filing date	Feb 26, 2014
Priority date	Feb 26, 2014
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

Disclosed is an extrusion machine including a head body and a die seat arranged on a front surface of the head body. A die is attached in a removable manner to the die seat. The die includes an extrusion outlet that is in communication with an opening through which plastic material is discharged out of the head body. A holding member is in contact with a front surface of the die. A pressing mechanism presses the holding member against the front surface of the die.

First claim

The invention claimed is:

1. An extrusion machine comprising:
a head body;
a die seat arranged on a front surface of the head body;
a die attached in a removable manner to the die seat, wherein the die includes an extrusion outlet that is in communication with an opening through which plastic material is discharged out of the head body;
a holding member that is in contact with a front surface of the die; and
a pressing mechanism that presses the holding member against the front surface of the die, wherein the pressing mechanism includes:
a bolt that presses the die against the die seat;
a first member coupled to the holding member;
a second member to which force is applied in one direction when the pressing produces a reaction force acting on the bolt; and
a cam surface arranged between the first member and the second member, wherein the cam surface causes the force applied in the one direction to the second member to act on the holding member toward the die.

2. The extrusion machine according to claim 1 , wherein the first member includes a first shaft inserted into a first bore of the die seat and provided with a head that is in contact with the holding member,
the second member includes:
a set member arranged on the die seat; and
a second shaft including a head that is in contact with the set member, wherein the second shaft is inserted into a second bore of the set member and the die seat, and
at least one of the first shaft and the second shaft includes a cam surface that is in contact with the other one of the first shaft and the second shaft.

3. The extrusion machine according to claim 1 , wherein the die is formed by two stacked die pieces, an extrusion outlet is formed between the die pieces, and the bolt presses the die pieces against each other.

4. The extrusion machine according to claim 2 , wherein the head body includes a spring that biases the first shaft in a direction in which the head of the first shaft moves away from the holding member.

Assignees

• Fuji Seiko Co Ltd
• Fuji Shoji Co Ltd

Inventors

• Nomura Shigeaki

Classifications

• B29C48/2566 Primary

  Die parts · CPC title

• B29C48/305

  having a wide opening, e.g. for forming sheets · CPC title

• B29K2021/00

  Use of unspecified rubbers as moulding material · CPC title

• B29C48/07

  Flat, e.g. panels · CPC title

• B29C48/30 Primary

  Extrusion nozzles or dies (extrusion characterised by the shape or cross-section of the extruded article B29C48/03) · CPC title