Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TEMPERATURE CONTROLLING UNIT OF INJECTION MOLDING MACHINE
Document Type and Number:
Japanese Patent JPS5857930
Kind Code:
A
Abstract:

PURPOSE: To keep the temperature of resin at the time of injection precisely at a desired value in the titled temperature controlling device for controlling a heater by a detected resin temperature by controlling temperature change factors too due to the performance of a movable part.

CONSTITUTION: Resin 14 taken from a hopper 11 into a cylinder 12 is heated and melted in a heater and a screw 16 is moved by a driving source 18 toward the left to inject resin 14 into a mold 17. In above-mensioned unit, resin temperature T detected by a temperature detector 15 and the pressure P detected by a pressure detector 20 when the resin is injected are transmitted to an arithmetic unit 30 (marks 27, 28 show amplifiers) to obtain a correction quantity indicated by the formula (x is a set temperature; K1, K2 are constants; ΔT indicates the increment part of resin temperature parallel to pressure P). Then, this is transmitted to a heater driving circuit 31 to correct the operational quanity to the heater 13. Using injection speed V, injection quantity D, number N of revolution of the screw, etc. along with the pressure P injected as mentioned above, the precision of temperature control can be lifted.


Inventors:
Akashi, Tomoyuki
Application Number:
JP1981000156088
Publication Date:
April 06, 1983
Filing Date:
October 02, 1981
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SUMITOMO HEAVY IND LTD
International Classes:
B29C37/00; B29C45/00; B29C45/74; B29C45/78; (IPC1-7): B29F1/08
Domestic Patent References:
JPS5023457A
JPS52124061A