Title:
AUTOMATIC APPARATUS FOR MEASURING RATIO
Document Type and Number:
Japanese Patent JPH059331
Kind Code:
A
Abstract:
PURPOSE:To obtain the subject apparatus, equipped with a cylindrical measuring vessel having a feed port and a discharge port of preexpanded particles and an openable and closable damper, a filling feeder and a device for measuring the weight of a resin and controlling the feed rate and capable of providing stable quality and high productivity. CONSTITUTION:An automatic apparatus 21 for measuring the expansion ratio is provided with a cylindrical measuring vessel 23 having a feed port 31 and a discharge port 34 for preexpanded particles 42 in respective upper and lower parts and an openable and closable damper 29 for forming a measuring space 30 in the interior, a filling feeder 24, arranged above the feed port 31 and feeding part of preexpanded particles 42 discharged from a batch type preexpanding machine 1 into the measuring space 30, a weight measuring instrument 25 for supporting the measuring vessel 23, measuring the weight of the preexpanded particles 42 in the measuring space 30 and issuing its value as an electrical signal and a controller 27 for receiving the issued electrical signal, converting the signal into the expansion ratio of the preexpanded particles 42, issuing a control signal corresponding to the deviation of the converted value from the preset prescribed expansion ratio and regulating the raw material feed rate into the preexpanding machine 1. The aforementioned apparatus 21 is used to automatically measure the expansion ratio.
Inventors:
TSUNETO KAZUHIRO
KAWASAKI KAORU
KAWASAKI KAORU
Application Number:
JP18559891A
Publication Date:
January 19, 1993
Filing Date:
June 28, 1991
Export Citation:
Assignee:
TAIKAI KOGYO KK
KANEGAFUCHI CHEMICAL IND
KANEGAFUCHI CHEMICAL IND
International Classes:
B29C44/00; C08J9/22; (IPC1-7): B29C67/22; C08J9/22
Attorney, Agent or Firm:
Kenji Itami
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