Title:
HYDRAULIC CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/012827
Kind Code:
A1
Abstract:
A hydraulic circuit 60 is used for a snap flask molding machine 1. The snap flask molding machine 1 is provided with: an upper molding flask 15; a lower molding flask 17; a lower raised flask 41; an upper plate 25 which can be placed into and out of an upper opening portion of the upper molding flask; a lower plate 40 which can be placed into and out of a lower opening portion of the lower raised flask; a first lower sand tank 30 for accumulating molding sand used for molding a lower mold; a second lower sand tank 31 for accumulating molding sand supplied from the first lower sand tank; a lower tank cylinder 32 for moving the first lower sand tank in upper and lower directions; and a squeeze cylinder 37 for performing a squeeze process by moving the second lower sand tank in an upper direction together with the lower plate. The hydraulic circuit 60 comprises a first hydraulic circuit 70 which supplies the lower tank cylinder with operating oil, and a second hydraulic circuit 80 which supplies the squeeze cylinder with operating oil.
Inventors:
SAKAGUCHI KOICHI (JP)
TERABE TOKIYA (JP)
TERABE TOKIYA (JP)
Application Number:
PCT/JP2018/020560
Publication Date:
January 17, 2019
Filing Date:
May 29, 2018
Export Citation:
Assignee:
SINTOKOGIO LTD (JP)
International Classes:
B22C19/00; B22C15/08; F15B11/024
Domestic Patent References:
| WO2017199338A1 | 2017-11-23 |
Foreign References:
| JPS5226316A | 1977-02-26 | |||
| JPS5660560U | 1981-05-23 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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