JPH03116915U - - Google Patents
Info
- Publication number
- JPH03116915U JPH03116915U JP2642790U JP2642790U JPH03116915U JP H03116915 U JPH03116915 U JP H03116915U JP 2642790 U JP2642790 U JP 2642790U JP 2642790 U JP2642790 U JP 2642790U JP H03116915 U JPH03116915 U JP H03116915U
- Authority
- JP
- Japan
- Prior art keywords
- small diameter
- diameter part
- injection molding
- molding machine
- ring valve
- 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
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
第１図は、本考案の一実施例の一部縦断面図、
第２図は、第１図の装置のスクリユヘツドの側面
図、第３図は、第２図の−における縦断面図
、第４図は、第１図の装置のリングバルブの側面
の縦断面図、第５図は、第４図の端面図、第６図
は、第１図の装置の弁座の側面の縦断面図、第７
図は、スクリユの通路面積を示す図、第８図は、
第１図の装置においてリングバルブが閉弁した状
態を示す一部縦断面図、第９図は、従来の射出成
形機の逆流防止装置の一部縦断面図である。
９……加熱筒、１０……スクリユ、１１……ス
クリユヘツド、１４……小径部、１５……リング
バルブ、２０……凸部、１６……通路、２１……
絞り部。
FIG. 1 is a partial vertical sectional view of an embodiment of the present invention;
2 is a side view of the screw head of the device shown in FIG. 1, FIG. 3 is a longitudinal sectional view taken at - in FIG. 2, and FIG. 4 is a longitudinal sectional view of the side of the ring valve of the device shown in FIG. 1. , FIG. 5 is an end view of FIG. 4, FIG. 6 is a longitudinal sectional view of the side surface of the valve seat of the device of FIG. 1, and FIG.
The figure shows the passage area of the screw, and Figure 8 shows the passage area of the screw.
FIG. 1 is a partial vertical cross-sectional view showing a state in which the ring valve is closed in the apparatus, and FIG. 9 is a partial vertical cross-sectional view of a conventional backflow prevention device for an injection molding machine. 9... Heating cylinder, 10... Screw, 11... Screw head, 14... Small diameter part, 15... Ring valve, 20... Convex part, 16... Passage, 21...
Aperture part.
Claims (1)
先端に取付けられるスクリユヘツドの中間部に小
径部を設け、該小径部を挿通させるリングバルブ
を設け、前記小径部の周上に鍔状の凸部を形成し
、該凸部により前記リングバルブの内周面と小径
部とで構成される溶融樹脂の通路に絞り部を設け
たことを特徴とする射出成形機の逆流防止装置。 A small diameter part is provided in the middle of the screw head that is attached to the tip of the screw inserted into the heating cylinder of the injection molding machine, a ring valve is provided to pass through the small diameter part, and a flange-like protrusion is provided on the circumference of the small diameter part. A backflow prevention device for an injection molding machine, characterized in that the convex portion forms a constriction portion in a molten resin passage formed by the inner circumferential surface of the ring valve and the small diameter portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2642790U JPH03116915U (en) | 1990-03-15 | 1990-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2642790U JPH03116915U (en) | 1990-03-15 | 1990-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03116915U true JPH03116915U (en) | 1991-12-03 |
Family
ID=31529321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2642790U Pending JPH03116915U (en) | 1990-03-15 | 1990-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03116915U (en) |
-
1990
- 1990-03-15 JP JP2642790U patent/JPH03116915U/ja active Pending