JPH0183519U - - Google Patents
Info
- Publication number
- JPH0183519U JPH0183519U JP1987178498U JP17849887U JPH0183519U JP H0183519 U JPH0183519 U JP H0183519U JP 1987178498 U JP1987178498 U JP 1987178498U JP 17849887 U JP17849887 U JP 17849887U JP H0183519 U JPH0183519 U JP H0183519U
- Authority
- JP
- Japan
- Prior art keywords
- ball transfer
- tip
- screw
- transfer surface
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009408 flooring Methods 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims 2
- 238000005096 rolling process Methods 0.000 claims 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
第１図は本考案のバツクフロ防止機構の正面切
断図、第２図は第１図のＡ−Ａ線視切断図、第３
図は本考案のバツクフロー防止機構を備えた加熱
シリンダ部分の切断図、第４図は従来のバツクフ
ロー防止機構の正面切断図である。
２……加熱シリンダ、８……スクリユチツプ、
９……バツクフローリング、１０……ボール、８
ａ……シート弁座、８ｂ……内側ボール転送面、
９ａ……当接座面、９ｂ……外側ボール転送面。
Fig. 1 is a front cutaway view of the backflow prevention mechanism of the present invention, Fig. 2 is a cutaway view taken along line A-A in Fig. 1, and Fig.
The figure is a cutaway view of a heating cylinder portion equipped with the backflow prevention mechanism of the present invention, and FIG. 4 is a front cutaway view of a conventional backflow prevention mechanism. 2... Heating cylinder, 8... Screw chip,
9... Back flooring, 10... Ball, 8
a...Seat valve seat, 8b...Inner ball transfer surface,
9a...Abutting seat surface, 9b...Outside ball transfer surface.
Claims (1)
ユー端に設けられ先端寄り後側外周に内側ボール
転送面を後端寄りフランジ端面にシート弁座を対
向して備えるスクリユチツプと、先端に前記内側
ボール転送面に対応する外側ボール転送面を有し
後端に前記シート弁座の当接座面を備え加熱シリ
ンダ先端部に軸方向に移動可能に嵌挿されるとと
もに前記スクリユチツプの前記内側ボール転送面
と前記シート弁座との間で内径及び軸方向とも大
きな隙間で遊挿されるバツクフローリングと、前
記内側及び外側ボール転送面の間に介装された複
数個の軸受用転動体とを含んでなる射出成形機の
スクリユのバツクフロー防止機構。 In an in-line injection molding machine, a screw chip is provided at the end of the screw and has an inner ball transfer surface on the rear outer periphery near the tip and a seat valve seat on the end surface of the flange near the rear end, and the tip corresponds to the inner ball transfer surface. The screw tip has an outer ball transfer surface with a contact surface for the seat valve seat at its rear end, and is fitted into the tip of the heating cylinder so as to be movable in the axial direction. A screw unit for an injection molding machine comprising: a back flooring loosely inserted between the inner and outer ball transfer surfaces with a large gap in both the inner diameter and the axial direction; and a plurality of bearing rolling elements interposed between the inner and outer ball transfer surfaces. backflow prevention mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987178498U JPH0183519U (en) | 1987-11-24 | 1987-11-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987178498U JPH0183519U (en) | 1987-11-24 | 1987-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0183519U true JPH0183519U (en) | 1989-06-02 |
Family
ID=31470111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987178498U Pending JPH0183519U (en) | 1987-11-24 | 1987-11-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0183519U (en) |
-
1987
- 1987-11-24 JP JP1987178498U patent/JPH0183519U/ja active Pending