JPH02142017U

JPH02142017U -

Info

Publication number: JPH02142017U
Application number: JP5025789U
Authority: JP
Priority date: 1989-05-01
Filing date: 1989-05-01
Publication date: 1990-11-30

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す可塑化射出装置
のシステム図、第２図及び第３図は夫々他の実施
例を示す可塑化射出装置の側面断面図、第４図は
第１図〜第３図におけるスクリユ起動運転パター
ンを示す説明図、第５図は第１図〜第３図におけ
るモータ又は電動機用の電気シーケンス図、第６
図は樹脂別によるスクリユトルク―スクリユ回転
数の関係を示す線図、第７図は従来の可塑化射出
装置を示す側断面図、第８図は第７図におけるス
クリユバレル部の詳細断面図、第９図は従来の可
塑化射出装置のスクリユ頭部に大きな力が加わる
ことを説明する断面図、第１０図は従来の冷間起
動防止装置を有する可塑化射出装置のシステム図
、第１１図は第９図及び第１０図におけるモータ
の電気シーケンス図である。図の主要部分の説明、１……スクリユ、６……
油圧モータ、１２……トーピード、２５……スク
リユ許容トルク設定器、２６……比較器、２７…
…モータ遮断指示リレー、２８……圧力ピツクア
ツプ、２９……圧力―トルク換算器、３０……ス
クリユ駆動電動機、３１……電流計、３２……歪
ゲージ、３３……流量弁、３４……低速回転設定
器、３６……スクリユ回転数切換タイマ。 FIG. 1 is a system diagram of a plasticizing injection device showing an embodiment of the present invention, FIGS. 2 and 3 are side sectional views of the plasticizing injection device showing other embodiments, and FIG. 4 is a system diagram of a plasticizing injection device showing another embodiment of the present invention. - An explanatory diagram showing the screw starting operation pattern in Fig. 3, Fig. 5 is an electrical sequence diagram for the motor or electric motor in Figs.
The figure is a diagram showing the relationship between screw torque and screw rotation speed for each resin, Figure 7 is a side sectional view showing a conventional plasticizing injection device, Figure 8 is a detailed sectional view of the screw barrel part in Figure 7, and Figure 9 is a diagram showing the relationship between screw torque and screw rotation speed for each resin. The figure is a cross-sectional view explaining that a large force is applied to the screw head of a conventional plasticizing injection device, FIG. 10 is a system diagram of a plasticizing injection device having a conventional cold start prevention device, and FIG. 10 is an electrical sequence diagram of the motor in FIGS. 9 and 10. FIG. Explanation of the main parts of the diagram, 1...Skrill, 6...
Hydraulic motor, 12...Torpedo, 25...Screw allowable torque setting device, 26...Comparator, 27...
... Motor cutoff instruction relay, 28 ... Pressure pickup, 29 ... Pressure-torque converter, 30 ... Screw drive motor, 31 ... Ammeter, 32 ... Strain gauge, 33 ... Flow rate valve, 34 ... Low speed Rotation setting device, 36... Screw rotation speed switching timer.

Claims

[Scope of utility model registration request]

a timer that operates from the start of rotation of the screw; a screw drive means that rotates the screw at a low rotation speed of less than a fraction of the normal rotation speed until the timer times out; and a screw drive torque detection means;
A means for setting and storing a breakage prevention torque value that can protect the screw head from breakage, a means for comparing the detected torque and the breakage prevention torque, and when the detected torque is equal to or exceeds the breakage prevention torque as a result of the comparison of the same torque. 1. A screw head breakage prevention device, comprising: means for stopping rotation of the screw.