Injection apparatus

Patent metadata

Field	Value
Publication number	US-11548196-B2
Application number	US-202017035753-A
Country	US
Kind code	B2
Filing date	Sep 29, 2020
Priority date	Oct 30, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

An injection apparatus of the invention injects a molding material supplied from a material supply port, and includes a die, a material supply apparatus that extrudes the molding material that is thread-like or strip-like via the die, and a material guide apparatus that guides the molding material supplied via the die to the material supply port. The material discharge port of the material supply apparatus and the die protrude downward in the material supply apparatus, and a pressure inside the material guide apparatus is reduced by a pressure reducing apparatus from a pressure reducing port provided above the material discharge port of the material supply apparatus and the die.

First claim

What is claimed is:

1. An injection apparatus, injecting a molding material supplied into an injection chamber of an apparatus body via a material supply port formed in the apparatus body, the injection apparatus comprising a die, a material supply apparatus, and a material guide apparatus,
wherein the die is provided between the material supply apparatus and the material guide apparatus, and has at least one through hole that penetrates through from the material supply apparatus to the material guide apparatus,
the material supply apparatus is configured to be able to supply the molding material that is thread-like or strip-like and has a cross section shape matching a shape of the through hole of the die to the material guide apparatus via the die by a pusher or a screw that extrudes the molding material,
the material guide apparatus is a chamber, and is configured to be able to guide the molding material supplied via the die to the material supply port,
a material discharge port of the material supply apparatus is further provided to protrude downward along a gravity direction inside the chamber of the material guide apparatus, and the die is attached to an end part of the material discharging port so that the whole die is disposed inside the chamber, and
a pressure reducing port is provided above the die and the material discharge port where the die is disposed in the chamber, and a pressure inside the chamber is reduced from the pressure reducing port by a pressure reducing apparatus.

2. The injection apparatus as claimed in claim 1 , wherein the material supply apparatus is configured to be able to adjust a speed of supplying the molding material to the material guide apparatus by a pusher driving apparatus that drives the pusher or a screw driving apparatus that drives the screw, and
the injection apparatus comprises a control apparatus that controls the pusher driving apparatus or the screw driving apparatus, so that a speed at which the material supply apparatus supplies the molding material to the material guide apparatus is slower than a speed at which the apparatus body supplies the molding material to the injection chamber.

3. The injection apparatus as claimed in claim 1 , wherein the material supply apparatus is configured to be able to adjust a speed of supplying the molding material to the material guide apparatus by a pusher driving apparatus that drives the pusher or a screw driving apparatus that drives the screw, and
the injection apparatus comprises a control apparatus that controls the pusher driving apparatus or the screw driving apparatus, so as to adjust a speed at which the material supply apparatus supplies the molding material to the material guide apparatus in response to an amount of the molding material remaining in the material guide apparatus.

4. The injection apparatus as claimed in claim 1 , wherein the apparatus body has a supply screw, a plasticizing screw, or an inline screw that supplies the molding material into the injection chamber, and is configured to be able to adjust a speed of supplying the molding material into the injection chamber by a supply screw driving apparatus that drives the supply screw, a plasticizing screw driving apparatus that drives the plasticizing screw, or an inline screw driving apparatus that drives the inline screw, and
the injection apparatus comprises a control apparatus that controls the supply screw driving apparatus, the plasticizing screw driving apparatus, or the inline screw driving apparatus, so that the speed at which the apparatus body supplies the molding material into the injection chamber is faster than a speed at which the material supply apparatus supplies the molding material to the material guide apparatus.

5. The injection apparatus as claimed in claim 1 , wherein the apparatus body has a supply screw, a plasticizing screw, or an inline screw that supplies the molding material into the injection chamber, and is configured to be able to adjust a speed of supplying the molding material into the injection chamber by a supply screw driving apparatus that drives the supply screw, a plasticizing screw driving apparatus that drives the plasticizing screw, or an inline screw driving apparatus that drives the inline screw, and
the injection apparatus comprises a control apparatus that controls the supply screw driving apparatus, the plasticizing screw driving apparatus, or the inline screw driving apparatus, so as to adjust the speed at which the apparatus body supplies the molding material into the injection chamber in response to an amount of the molding material remaining in the material guide apparatus.

6. The injection apparatus as claimed in claim 1 , wherein the die is configured to be removable.

7. The injection apparatus as claimed in claim 1 , wherein the die is configured to be able to adjust a size of the through hole.

8. The injection apparatus as claimed in claim 1 , wherein the material supply apparatus comprises a cylinder that accommodates the molding material and accommodates the pusher to be movable back and forth, and
the pusher moves forward to extrude the molding material in the cylinder to the material guide apparatus via the die.

9. The injection apparatus as claimed in claim 1 , wherein the material supply apparatus comprises a cylinder that accommodates the molding material and accommodates the screw to be rotatable, and
the screw rotates to extrude the molding material in the cylinder to the material guide apparatus via the die.

10. The injection apparatus as claimed in claim 1 , wherein the molding material is rubber or silicon rubber,
the apparatus body comprises a supply cylinder, a supply screw, an injection cylinder, and an injection plunger,
the supply cylinder is formed with the material supply port, and accommodates the supply screw to be rotatable,
the supply screw rotates to supply the molding material guided from the material supply port into the injection cylinder,
the injection cylinder is formed with the injection chamber that accommodates the molding material supplied from the supply cylinder, and accommodates the injection plunger to be movable back and forth, and
the injection plunger moves backward to measure the molding material in the injection chamber, and moves forward to inject the molding material in the injection chamber.

11. The injection apparatus as claimed in claim 1 , wherein the molding material is thermoplastic resin,
the apparatus body comprises a plasticizing cylinder, a plasticizing screw, an injection cylinder, and an injection plunger,
the plasticizing cylinder is formed with the material supply port, and accommodates the plasticizing screw to be rotatable,
the plasticizing screw rotates to plasticize, melt, and supply the molding material guided from the material supply port into the injection cylinder,
the injection cylinder is formed with the injection chamber that accommodates the molding material in a melt state supplied from the plasticizing cylinder, and accommodates the injection plunger to be movable back and forth, and
the injection plunger moves backward to measure the molding material in the melt state in the injection chamber, and moves forward to inject the molding material in the melt state in the injection chamber.

Assignees

• Sodick Co Ltd

Inventors

• Yokoyama Koichi

Classifications

• B29C45/531

  Drive means therefor · CPC title

• B29C45/586

  Injection or transfer plungers · CPC title

• B29C45/542 Primary

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

• B29C45/60

  Screws · CPC title

• B29C45/54 Primary

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