GB513975A - Improvements in injection molding devices - Google Patents

Improvements in injection molding devices

Info

Publication number
GB513975A
GB513975A GB15601/38A GB1560138A GB513975A GB 513975 A GB513975 A GB 513975A GB 15601/38 A GB15601/38 A GB 15601/38A GB 1560138 A GB1560138 A GB 1560138A GB 513975 A GB513975 A GB 513975A
Authority
GB
United Kingdom
Prior art keywords
cylinder
nozzle
core
injection
bore
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
GB15601/38A
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.)
WATSON STILLMAN CO
Original Assignee
WATSON STILLMAN 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 WATSON STILLMAN CO filed Critical WATSON STILLMAN CO
Publication of GB513975A publication Critical patent/GB513975A/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
    • B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
    • 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
    • B29C45/72—Heating or cooling

Abstract

513,975. Injection moulding. WATSONSTILLMAN CO. May 25, 1938, No. 15601. Convention date, April 2. [Class 87 (ii)] In injection-moulding apparatus comprising a cylinder 1 having at one end an injection nozzle 3 and carrying a core 9 between the nozzle 3 and a reciprocable plunger, the bore 6 of the cylinder is elongated and of uniform diameter, the core is supported within the cylinder to define a narrow passage of length exceeding the plunger stroke and of uniform radial width and is heated solely from heating means for the cylinder, such as electric units 13, and mainly by conduction through the thermoplastic material being injected. The annular width of the passage is preferably “ inch and its length is preferably two and one-half times the plunger stroke. The nozzle 3 is removable so that the core can be slid out and screws into a counter-bore 8 on the cylinder 1. The core is cylindrical and of torpedo-like form with tapered ends and is supported by radial fins 10 which may extend along its length or be limited to the end portions. The core abuts against the nozzle 3 which is provided with a tapered cavity 3e leading to the injection port 3d. The shank 3b of the nozzle is screw threaded and is provided with longitudinal grooves 11 leading to an annular space defined by a bead 3f whereby material forced past the joint can escape. The heating units are surrounded by asbestos packing 16. The temperature is controlled from a thermocouple 20 in an oblique bore 19 in the cylinder 1.
GB15601/38A 1938-04-02 1938-05-25 Improvements in injection molding devices Expired GB513975A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US513975XA 1938-04-02 1938-04-02

Publications (1)

Publication Number Publication Date
GB513975A true GB513975A (en) 1939-10-26

Family

ID=21971050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15601/38A Expired GB513975A (en) 1938-04-02 1938-05-25 Improvements in injection molding devices

Country Status (1)

Country Link
GB (1) GB513975A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104626483A (en) * 2015-02-10 2015-05-20 北京化工大学 Annular multi-screw mixing and injecting integrated forming machine
TWI620643B (en) * 2014-05-28 2018-04-11 Open hot runner gate construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI620643B (en) * 2014-05-28 2018-04-11 Open hot runner gate construction
CN104626483A (en) * 2015-02-10 2015-05-20 北京化工大学 Annular multi-screw mixing and injecting integrated forming machine

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