Injecting machine for injecting mixture of two different liquids in first-in and first-out manner

Patent metadata

Field	Value
Publication number	US-9987603-B2
Application number	US-201414153890-A
Country	US
Kind code	B2
Filing date	Jan 13, 2014
Priority date	Jan 16, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

An injecting machine includes an injection cylinder, a plunger, a plunger moving mechanism, and a mixing mechanism. The plunger is reciprocally received in the injection cylinder for moving between an advanced position and a retracted position, with the injecting a liquid mixture of two different liquid materials as the plunger moves to the advanced position. The plunger moving mechanism causes the plunger to move between the advanced position and the retracted position. The mixing mechanism is disposed on the injection cylinder for mixing the two different liquid materials together to feed the liquid mixture into the injection cylinder. The plunger includes a front portion having a helical groove formed on an outer circumferential surface thereof to allow the liquid mixture fed from the mixing mechanism to pass through the helical groove for collecting in a forward space formed forward of the front portion of the plunger.

First claim

What is claimed is:

1. An injecting machine for two different liquid materials, comprising:
a generally horizontally disposed injection cylinder having a nozzle disposed on a distal end thereof;
a plunger reciprocally received in the injection cylinder for moving between an advanced position and a retracted position, the plunger injecting a liquid mixture of the two different liquid materials as the plunger moves to the advanced position;
plunger moving means for causing the plunger to move between the advanced position and the retracted position; and
a mixing mechanism disposed on the injection cylinder for mixing the two different liquid materials together to feed the liquid mixture into the injection cylinder,
wherein the plunger includes a front portion having a helical groove formed on an outer circumferential surface thereof to allow the liquid mixture fed from the mixing mechanism to pass through the helical groove for collecting in a forward space formed forward of the front portion of the plunger,
wherein the two different liquid materials include a first liquid material and a second liquid material,
wherein the mixing mechanism comprises:
a mixing block disposed to extend generally vertically,
a screw rotatably accommodated in the mixing block,
a screw rotating mechanism supported on the mixing block for rotating the screw,
a first liquid supply passage disposed at a first portion of the mixing block for supplying the first liquid material to a proximal portion of the screw,
a second liquid supply passage disposed at a second portion of the mixing block for supplying the second liquid material to the proximal portion of the screw, the second portion being separate from the first portion, and
a generally horizontally extending first passage formed in the mixing block for causing the liquid mixture to flow out of a vicinity of a distal end of the screw and being in communication with the injection cylinder,

wherein the first liquid supply passage has a first connection port formed in the first portion of the mixing block, and the second liquid supply passage has a second connection port formed in the second portion of the mixing block, the first connection port and the second connection port being arranged on a line passing through an axis of rotation of the screw, and
wherein the screw is interposed between the first connection port of the first liquid supply passage and the second connection port of the second liquid supply passage.

2. The injecting machine of claim 1 , wherein the first passage is in communication with the injection cylinder via a second passage extending generally perpendicular to and from a distal end of the first passage and into the injection cylinder.

3. An injecting machine for two different liquid materials, comprising:
a generally horizontally disposed injection cylinder having a nozzle disposed on a distal end thereof;
a plunger reciprocally received in the injection cylinder for moving between an advanced position and a retracted position, the plunger injecting a liquid mixture of the two different liquid materials as the plunger moves to the advanced position;
plunger moving means for causing the plunger to move between the advanced position and the retracted position; and
a mixing mechanism disposed on the injection cylinder for mixing the two different liquid materials together to feed the liquid mixture into the injection cylinder,
wherein the plunger includes a front portion having a helical groove formed on an outer circumferential surface thereof to allow the liquid mixture fed from the mixing mechanism to pass through the helical groove for collecting in a forward space formed forward of the front portion of the plunger, and
wherein the mixing mechanism comprises:
a body mounted on a surface of the injection cylinder;
a valve member vertically movably received in the body;
a valve actuator secured to the body for driving the valve member to move between open and closed positions;
a mixing block disposed to extend generally vertically attached to a lateral side of the body;
a screw rotatably accommodated in the mixing block;
a screw rotating mechanism supported on the mixing block for rotating the screw; and
a first passage formed in the mixing block and extending to the body for causing the liquid mixture to flow out of a vicinity of a distal end of the screw and being in communication with the injection cylinder,
the first passage extending generally horizontally.

4. The injecting machine of claim 3 , wherein the mixing mechanism further comprises:
a first liquid supply passage disposed at a first portion of the mixing block for supplying the first liquid material to a proximal portion of the screw, the first liquid supply passage having a first connection port formed in the first portion of the mixing block; and
a second liquid supply passage disposed at a second portion of the mixing block different from the first portion thereof for supplying the second liquid material to the proximal portion of the screw, the second liquid supply passage having a second connection port formed in the second portion of the mixing block.

5. The injecting machine of claim 4 , wherein the first connection port and the second connection port are arranged on a line passing through an axis of rotation of the screw.

6. The injecting machine of claim 5 , wherein the screw is interposed between the first connection port of the first liquid supply passage and the second connection port of the second liquid supply passage.

7. The injecting machine of claim 3 , wherein the first passage is in communication with the injection cylinder via a second passage extending generally perpendicular to and from a distal end of the first passage out of the body and into the injection cylinder.

8. The injecting machine of claim 7 , wherein when driven by the valve actuator to move to the closed position, the valve member closes the second passage; and wherein when driven by the valve actuator to move to the open position, the valve member brings the second passage into fluid communication with the first passage.

9. An injecting machine for two different liquid materials, the injecting comprising:
a mixing mechanism for mixing two different liquid materials together to provide a liquid mixture;
a generally horizontally disposed injection cylinder mounted to the mixing mechanism for receiving the liquid mixture from the mixing mechanism, the injection mechanism having a nozzle disposed on a distal end thereof; and
a plunger reciprocally received in the injection cylinder for moving between an advanced position and a retracted position, the plunger being configured to inject the liquid mixture out of the nozzle of the injection cylinder as the plunger moves to the advanced position, and the plunger including a front portion having a helical groove formed on an outer circumferential surface thereof to allow the received liquid mixture to pass through the helical groove for collecting in a forward space formed forwardly of the front portion of the plunger as the plunger moves to the retracted position;
wherein the mixing mechanism comprises:
a body mounted on a surface of the injection cylinder;
a valve member vertically movably received in the body;
a valve actuator secured to the body for driving the valve member to move between open and closed positions;
a mixing block disposed to extend generally vertically attached to a lateral side of the body;
a screw rotatably accommodated in the mixing block;
a screw rotating mechanism supported on the mixing block for rotating the screw, screw; and
a first passage formed in the mixing block and extending to the body for causing the liquid mix

Assignees

• Nissei Plastics Ind Co
• Nissei Plastic Ind Ltd

Inventors

• Ikeda Toru

Classifications

• B29C45/542

  using an accumulator between plasticising and injection unit, e.g. for a continuously operating plasticising screw · CPC title

• B29C45/53 Primary

  using injection ram or piston · CPC title

• Y10T137/87652

  With means to promote mixing or combining of plural fluids · CPC title

• B29B7/7647

  Construction of the mixing conduit module or chamber part · CPC title

• B29C45/54

  and plasticising screw {(B29C45/532 takes precedence)} · CPC title