Molding machine

Patent metadata

Field	Value
Publication number	US-11794380-B2
Application number	US-202117172389-A
Country	US
Kind code	B2
Filing date	Feb 10, 2021
Priority date	Mar 19, 2020
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

The present invention includes: an injection container unit; a lid member; and an ejection air supply section configured to press a foamed mixed material in the injection container unit with compressed air and thereby eject the foamed mixed material through an ejection port, the lid member being provided with a sealing body configured to deform when a fluid is injected and thereby make close contact with the inner circumferential surface of the injection container unit during the pressing.

First claim

The invention claimed is:

1. A molding machine comprising:
an injection container unit configured to store a foamed mixed material;
a lid member configured to open and close an opening at a top of the injection container unit; and
an air supplying section configured to supply air into the injection container unit to thereby eject the foamed mixed material through an ejection port in the injection container unit,
the lid member having a circumferential surface on which a sealing body is provided, the sealing body being configured to (i) inflate when supplied with a fluid and thereby make close contact with an inner circumferential surface of the injection container unit and (ii) deflate when the fluid stops being supplied while the sealing body having inflated due to supply of the fluid is in close contact with the inner circumferential surface, and thereby break the close contact and detach from the inner circumferential surface of the injection container unit,
supply of the fluid to the sealing body being stopped while the lid member is being moved in a case of closure, by the lid member, of the opening of the injection container unit and in a case of removal, from the opening, of the lid member having closed the opening of the injection container, the lid member and the sealing body moving without sliding on the inner circumferential surface of the injection container unit in the closure and in the removal,
the lid member including an upper partial member and a lower partial member,
the lower partial member having a surface facing toward an inside of the injection container,
the upper partial member having a first recess in a first surface of the upper partial member, the lower partial member having a second recess in a second surface of the lower partial member, the first surface and the second surface facing each other, the first recess and the second recess joining together to form a recess on the circumferential surface of the lid member,
the sealing body including (i) a sealing portion which, in cross-section, is convex toward the inner circumferential surface of the injection container unit, the sealing portion being exposed on the circumferential surface of the lid member, and (ii) mounting portions located at opposite edges of the sealing portion, the mounting portions abutting on the recess.

2. The molding machine according to claim 1 , wherein
the injection container unit includes:
a lower unit which has the ejection port;
an upper unit which is located opposite the lower unit;
a lateral part which is present between the lower unit and the upper unit and which is composed of a transparent material; and
a plurality of struts which are provided outside the lateral part and which connect the lower unit and the upper unit.

3. The molding machine according to claim 1 , wherein the circumferential surface of the lid member has the recess configured to have the sealing portion placed therein except for a convex portion of the sealing portion such that the convex portion is exposed, and the recess is configured to abut on the mounting portions so that the mounting portions are restricted from moving toward the inner circumferential surface of the injection container unit.

4. The molding machine according to claim 3 , wherein a spacer is provided between the mounting portions, the spacer being configured to keep the mounting portions away from each other at a predetermined distance.

5. The molding machine according to claim 4 , wherein:
the sealing body is made of rubber; and
the spacer is composed of a material that is harder than the sealing body.

Assignees

• Sintokogio Ltd

Inventors

• Komiyama Takayuki
• Aoki Tomohiro

Classifications

• B29C33/3842 Primary

  Manufacturing moulds, e.g. shaping the mould surface by machining · CPC title

• B22C15/23 Primary

  Compacting by gas pressure or vacuum · CPC title

• B22C5/044

  Devices having a vertical stirrer shaft in a fixed receptacle (B22C5/0422 takes precedence) · CPC title

• B22C5/12

  for filling flasks (in combination with compacting B22C15/20 - B22C15/28) · CPC title