JPH0210904U - - Google Patents
Info
- Publication number
- JPH0210904U JPH0210904U JP8960788U JP8960788U JPH0210904U JP H0210904 U JPH0210904 U JP H0210904U JP 8960788 U JP8960788 U JP 8960788U JP 8960788 U JP8960788 U JP 8960788U JP H0210904 U JPH0210904 U JP H0210904U
- Authority
- JP
- Japan
- Prior art keywords
- diameter portion
- screw head
- outer diameter
- screw
- inner hole
- 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
- 239000011347 resin Substances 0.000 claims 4
- 229920005989 resin Polymers 0.000 claims 4
- 238000010438 heat treatment Methods 0.000 claims 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 239000000919 ceramic Substances 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
第１図は本考案の要部でありスクリユーヘツド
附近の断面図、第２図は第１図の―矢視断面
図、第３図および第４図は従来のスクリユーヘツ
ド附近の断面図である。
１５……スクリユーヘツド、１６……小径部、
１９，２０……ウエアプレート、２１……カラー
、２２……リングバルブ。
Fig. 1 is a sectional view of the main part of the present invention near the screw head, Fig. 2 is a sectional view taken along the - arrow in Fig. 1, and Figs. 3 and 4 are sectional views of the vicinity of the conventional screw head. It is. 15...Screw head, 16...Small diameter part,
19, 20... Wear plate, 21... Collar, 22... Ring valve.
Claims (1)
した小径部を備えたスクリユーヘツドの該小径部
の先端をスクリユー先端に螺合し、 該小径部に一対のセラミツクス製のウエアプレ
ートを挿嵌するとともに、小径部の外径に密に挿
嵌したカラーによつて該一対のウエアプレートの
位置を該カラーの両端に固定し、 且つ、該カラーの外周部に樹脂が流通しうるよ
うな間隙を設けるようにした内孔を備え、さらに
スクリユーヘツド先端側にスクリユーヘツドの軸
線を横切る方向に樹脂の流入を許す複数の切欠溝
を設けたセラミツクス製のリングバルブを加熱筒
の内孔に摺動可能に挿嵌し、 前記一対のウエアプレートの内、スクリユーヘ
ツド側のウエアプレートの外径を該スクリユーヘ
ツドの大径部の外径より該ウエアプレート側面の
外周における外方に突出した円弧状の面取り部が
突出するように大きくするとともに加熱筒内孔と
の間に樹脂が流入できる程度に大きくし、同様に
スクリユー側のウエアプレートの側面外周におけ
る外方に突出した円弧状の面取り部が突出でき加
熱筒内孔との間に樹脂が流入できる程度に該スク
リユー側のウエアプレートの外径をスクリユーの
溝部外径より大きくしたことを特徴とする射出成
形機の逆流防止弁。[Scope of Claim for Utility Model Registration] A screw head having a large diameter portion with a conical tip and a small diameter portion directly connected to the large diameter portion, the tip of the small diameter portion being screwed onto the tip of the screw, and the small diameter portion A pair of ceramic wear plates is inserted into the outer diameter of the small diameter portion, and the position of the pair of wear plates is fixed at both ends of the collar by means of a collar closely fitted to the outer diameter of the small diameter portion. Ceramic material with an inner hole on the outer periphery that provides a gap for resin to flow through, and a plurality of notched grooves on the tip side of the screw head that allow resin to flow in a direction transverse to the axis of the screw head. A ring valve made of aluminum is slidably inserted into the inner hole of the heating cylinder, and the outer diameter of the wear plate on the screw head side of the pair of wear plates is set to be smaller than the outer diameter of the large diameter part of the screw head. The arcuate chamfered part of the outer circumference of the side surface of the wear plate is made large enough to protrude, and is made large enough to allow resin to flow in between the inner hole of the heating cylinder. The outer diameter of the wear plate on the screw side is made larger than the outer diameter of the groove of the screw to such an extent that the arc-shaped chamfered portion protruding outward on the outer periphery of the side surface can protrude and the resin can flow in between the inner hole of the heating cylinder. Features a backflow prevention valve for injection molding machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8960788U JPH0210904U (en) | 1988-07-06 | 1988-07-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8960788U JPH0210904U (en) | 1988-07-06 | 1988-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210904U true JPH0210904U (en) | 1990-01-24 |
Family
ID=31314152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8960788U Pending JPH0210904U (en) | 1988-07-06 | 1988-07-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023153187A1 (en) * | 2022-02-08 | 2023-08-17 | 株式会社日本製鋼所 | Backflow prevention apparatus, screw, and injection molding machine |
-
1988
- 1988-07-06 JP JP8960788U patent/JPH0210904U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023153187A1 (en) * | 2022-02-08 | 2023-08-17 | 株式会社日本製鋼所 | Backflow prevention apparatus, screw, and injection molding machine |