GB533685A - Improvements in plungers for pressure casting machines - Google Patents

Improvements in plungers for pressure casting machines

Info

Publication number
GB533685A
GB533685A GB30031/39A GB3003139A GB533685A GB 533685 A GB533685 A GB 533685A GB 30031/39 A GB30031/39 A GB 30031/39A GB 3003139 A GB3003139 A GB 3003139A GB 533685 A GB533685 A GB 533685A
Authority
GB
United Kingdom
Prior art keywords
plunger
pressure casting
plungers
casting machines
carburizing
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.)
Expired
Application number
GB30031/39A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lester Engineering Co
Original Assignee
Lester Engineering Co
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 Lester Engineering Co filed Critical Lester Engineering Co
Publication of GB533685A publication Critical patent/GB533685A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/586—Injection or transfer plungers

Abstract

533,685. Pistons. LESTER ENGINEERING CO. Nov. 14, 1939, No. 30031, Convention date, Oct. 2. [Class 122 (i)] The annular plunger 7 of a pressure casting machine has its end, which engages the plasticized or other material M to be cast, concave. This groove 8 may have a parabolic cross section, and the inner and outer walls 10 and 9 are so thin that in use the pressure forces them into close contact with the central rod 2 and cylinder 1 respectively. The plunger is made of strong, hard, heat resisting metal, e.g. alloy steel, and the end portion is so treated as to make it relatively soft and resilient. This treatment may consists in carburizing the whole plunger and air quenching or drawing its temper by immersing its lower end in a lead bath.
GB30031/39A 1939-10-02 1939-11-14 Improvements in plungers for pressure casting machines Expired GB533685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US533685XA 1939-10-02 1939-10-02

Publications (1)

Publication Number Publication Date
GB533685A true GB533685A (en) 1941-02-18

Family

ID=21983738

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30031/39A Expired GB533685A (en) 1939-10-02 1939-11-14 Improvements in plungers for pressure casting machines

Country Status (1)

Country Link
GB (1) GB533685A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1181899B (en) * 1960-02-19 1964-11-19 Karl Theodor Seidl Piston injection molding machine for processing thermosetting plastic compounds
NL1005339C2 (en) * 1997-02-21 1998-02-26 3P Licensing Bv Feed device, particularly for transfer-moulding unit
WO2003039837A1 (en) * 2001-11-07 2003-05-15 Carl Freudenberg Kg Method and injection molding machine for the production of elastomer and duromer molded items

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1181899B (en) * 1960-02-19 1964-11-19 Karl Theodor Seidl Piston injection molding machine for processing thermosetting plastic compounds
NL1005339C2 (en) * 1997-02-21 1998-02-26 3P Licensing Bv Feed device, particularly for transfer-moulding unit
WO2003039837A1 (en) * 2001-11-07 2003-05-15 Carl Freudenberg Kg Method and injection molding machine for the production of elastomer and duromer molded items
US7413696B2 (en) 2001-11-07 2008-08-19 Carl Freudenberg Kg Method and injection molding machine for the production of elastomer and duromer molded items

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