Heating cylinder cover and heating cylinder device of injection molding machine

Patent metadata

Field	Value
Publication number	US-10427338-B2
Application number	US-201715644338-A
Country	US
Kind code	B2
Filing date	Jul 7, 2017
Priority date	Jul 8, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A heating cylinder cover for covering a heating cylinder includes a temperature control mechanism in which at least a plurality of heating units are provided on an outer circumferential surface of a heating cylinder body along an axial direction. The heating cylinder cover includes a heat-retaining cover part that is integrally provided with a cover body part and a plurality of partition parts. The cover body part is attached to the heating cylinder thereby forming a predetermined covered space between the cover body part and the temperature control mechanism and covers at least an upper half part of the heating cylinder. The partition parts project from an inner surface of this cover body part toward the temperature control mechanism and divides the covered space into a plurality of closed spaces.

First claim

The invention claimed is:

1. A heating cylinder cover of an injection molding machine that covers a heating cylinder having a temperature control mechanism in which at least a plurality of heating units are provided on an outer circumferential surface of a heating cylinder body along an axial direction, the heating cylinder cover comprising:
a heat-retaining cover part that is integrally provided with a cover body part and a plurality of partition parts, the cover body part being attached to the heating cylinder thereby forming a predetermined covered space between the cover body part and the temperature control mechanism and covering at least an upper half part of the heating cylinder, the partition parts projecting from an inner surface of this cover body part toward the temperature control mechanism and dividing the covered space into a plurality of closed spaces;
wherein the partition parts are set in different heating areas in the heating cylinder body, respectively.

2. The heating cylinder cover of the injection molding machine according to claim 1 , wherein the cover body part is configured to have a multi-layer structure in which a plurality of plate members are stacked on top of another through a predetermined gap.

3. The heating cylinder cover of the injection molding machine according to claim 1 , wherein the cover body part is configured to have a single-layer structure using one plate member.

4. The heating cylinder cover of the injection molding machine according to claim 1 , wherein the heating areas include a front heating area, a middle heating area, a rear-front-side heating area, and a rear-back-side heating area in order from a front side of the heating cylinder or combinations of these heating areas.

5. A heating cylinder device of an injection molding machine that includes a heating cylinder having a temperature control mechanism in which at least a plurality of heating units are provided on an outer circumferential surface of a heating cylinder body along an axial direction and a heating cylinder cover for covering this heating cylinder, the heating cylinder device comprising:
the heating cylinder cover including a heat-retaining cover part that is integrally provided with a cover body part and a plurality of partition parts, the cover body part being attached to the heating cylinder thereby forming a predetermined covered space between the cover body part and the temperature control mechanism and covering at least an upper half part of the heating cylinder, the partition parts projecting from an inner surface of this cover body part toward the temperature control mechanism and dividing the covered space into a plurality of closed spaces;
wherein the partition parts are set in different heating areas in the heating cylinder body, respectively.

6. The heating cylinder device of the injection molding machine according to claim 5 , wherein at least part of distal ends of the partition parts lies in the gaps generated between the heating units in the axial direction.

7. The heating cylinder device of the injection molding machine according to claim 5 , wherein the closed spaces are set in different heating areas in the heating cylinder body, respectively.

8. The heating cylinder device of the injection molding machine according to claim 7 , wherein the heating areas include a front heating area, a middle heating area, a rear-front-side heating area, and a rear-back-side heating area in order from a front side of the heating cylinder or combinations of these heating areas.

9. The heating cylinder device of the injection molding machine according to claim 5 , wherein the temperature control mechanism includes the heating units each using a band heater provided along the axial direction of the outer circumferential surface.

10. The heating cylinder device of the injection molding machine according to claim 9 , wherein the temperature control mechanism includes an air-cooled type cooling unit composed of an air passageway provided between the outer circumferential surface and the band heaters.

11. The heating cylinder device of the injection molding machine according to claim 10 , wherein the air passageway is composed of a pattern formed by making a slit in a plate member lying between the outer circumferential surface of the heating cylinder body and the band heaters.

12. The heating cylinder device of the injection molding machine according to claim 5 , wherein the heating cylinder cover includes a protective cover part with a porous surface formed on at least part thereof, the porous surface being provided lateral to the cover body part to cover part or all of the cover body part.

13. The heating cylinder device of the injection molding machine according to claim 12 , wherein the protective cover part includes attachment parts for attachment to the heating cylinder side on both right and left sides thereof in a radial direction of the heating cylinder, and at least the attachment part on the side on which an operation screen is provided out of the both right and left sides is configured to have a locking structure in which no projection part projecting outward is caused.

14. The heating cylinder device of the injection molding machine according to claim 5 , wherein the cover body part is formed to have a shape of covering the upper half part of the heating cylinder, and the heating cylinder cover includes a lower protective cover part that has a porous surface formed on at least part thereof and covers a lower half part of the heating cylinder.

15. The heating cylinder device of the injection molding machine according to claim 14 , wherein the lower protective cover part includes attachment parts for attachment to the heating cylinder side on both right and left sides thereof in a radial direction of the heating cylinder, and at least the attachment part on the side on which an operation screen is provided out of the both right and left sides is configured to have a locking structure in which no projection part projecting outward is caused.

Assignees

• Nissei Plastics Ind Co

Inventors

• Sakurada Yuichi
• Takahashi Yoshihiko
• Kouda Takahiro

Classifications

• B29C45/16

  Making multilayered or multicoloured articles {(B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816)} · CPC title

• B29C45/20

  Injection nozzles {(B29C45/1603 takes precedence)} · CPC title

• B29L2031/18

  Heat-exchangers or parts thereof · CPC title

• B29C45/03 Primary

  Injection moulding apparatus (transfer moulding B29C45/02) · CPC title

• B29C45/74 Primary

  of the injection unit · CPC title