JPS60169738A - Defective product detecting method of injection molded product - Google Patents

Defective product detecting method of injection molded product

Info

Publication number
JPS60169738A
JPS60169738A JP2560784A JP2560784A JPS60169738A JP S60169738 A JPS60169738 A JP S60169738A JP 2560784 A JP2560784 A JP 2560784A JP 2560784 A JP2560784 A JP 2560784A JP S60169738 A JPS60169738 A JP S60169738A
Authority
JP
Japan
Prior art keywords
molded
shot
weight
products
allowance
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
Application number
JP2560784A
Other languages
Japanese (ja)
Inventor
Masao Shizawa
Original Assignee
Orion Kasei Kk
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Orion Kasei Kk filed Critical Orion Kasei Kk
Priority to JP2560784A priority Critical patent/JPS60169738A/en
Publication of JPS60169738A publication Critical patent/JPS60169738A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/44—Resins; rubber; leather
    • G01N33/442—Resins, plastics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid

Abstract

PURPOSE:To judge the quality of synthetic resin products under production accurately and automatically, by measuring the weight of the injection molded product for every one shot continuously, and comparing the weight of the molded product with the weight of the molded product in the previous shot. CONSTITUTION:In the injection molding process of a synthetic resin, the weight of the molded product in the first shot is measured by an electronic scale. Then the weight of the molded product in the second shot is measured. Then, whether the weight of the second-shot molded product is within the allowance or not with respect to the weight of the first-shot molded product or not is operated by an upper limit comparator and a lower limit comparator. For example, when the weight of the first-shot molded product is 200g, the allowance is made to be 0.3-0.5g. Even though a metal-mold temperature 3 is adjusted at a specified temperature, the temperature of an injection molding machine is increased with the number of shots during the operation. The weights of the molded products at the higher number of the shots become light as shown by a line 1. The weights of the molded shot products are measured continuously and compared with those of the previous molded shot products. Whether the weights are within the allowance or not is operated and the selection is performed. Therefore the quality of the molded product can be automatically judged accurately.
JP2560784A 1984-02-14 1984-02-14 Defective product detecting method of injection molded product Pending JPS60169738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2560784A JPS60169738A (en) 1984-02-14 1984-02-14 Defective product detecting method of injection molded product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2560784A JPS60169738A (en) 1984-02-14 1984-02-14 Defective product detecting method of injection molded product

Publications (1)

Publication Number Publication Date
JPS60169738A true JPS60169738A (en) 1985-09-03

Family

ID=12170579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2560784A Pending JPS60169738A (en) 1984-02-14 1984-02-14 Defective product detecting method of injection molded product

Country Status (1)

Country Link
JP (1) JPS60169738A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285235A (en) * 1989-04-27 1990-11-22 Chichibu Cement Co Ltd Method and apparatus for detecting reject of concrete product
EP0698468A1 (en) * 1994-08-18 1996-02-28 SUMITOMO WIRING SYSTEMS, Ltd. Weight checker for moldings
KR20010016543A (en) * 2000-12-07 2001-03-05 민병현 On-line Quality Monitoring of Injection Molded Parts using Indirect Control Parameters
EP3315281A1 (en) * 2016-10-31 2018-05-02 Sumitomo Heavy Industries, Ltd. Sorting device for injection molding product and injection molding system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285235A (en) * 1989-04-27 1990-11-22 Chichibu Cement Co Ltd Method and apparatus for detecting reject of concrete product
EP0698468A1 (en) * 1994-08-18 1996-02-28 SUMITOMO WIRING SYSTEMS, Ltd. Weight checker for moldings
US5817988A (en) * 1994-08-18 1998-10-06 Sumitomo Wiring Systems, Ltd. Weight checker for moldings
KR20010016543A (en) * 2000-12-07 2001-03-05 민병현 On-line Quality Monitoring of Injection Molded Parts using Indirect Control Parameters
EP3315281A1 (en) * 2016-10-31 2018-05-02 Sumitomo Heavy Industries, Ltd. Sorting device for injection molding product and injection molding system

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