GB501277A - Improvements in and relating to the moulding of thermoplastic materials by injection - Google Patents

Improvements in and relating to the moulding of thermoplastic materials by injection

Info

Publication number
GB501277A
GB501277A GB2297437A GB2297437A GB501277A GB 501277 A GB501277 A GB 501277A GB 2297437 A GB2297437 A GB 2297437A GB 2297437 A GB2297437 A GB 2297437A GB 501277 A GB501277 A GB 501277A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
nozzle
mould
low pressure
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
GB2297437A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2297437A priority Critical patent/GB501277A/en
Publication of GB501277A publication Critical patent/GB501277A/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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • 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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C2045/537—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston the injection plunger cooperating with a coaxial hollow transfer plunger

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

501,277. Injection moulding. CRAFTON, H. Aug. 21, 1937, No. 22974. [Class 87 (ii)] Injection - moulding apparatus for thermoplastic material is provided with a dual stage feed and heating cylinder in which the material is first subjected to low pressure by one piston and then to a high pressure by a second piston which forces it through a nozzle' into a mould. As shown in Fig. 1, the material is supplied through an inlet 3 to a cylinder 2 in which works the low pressure piston 1. The high pressure piston 4 is guided centrally or eccentrically in( the piston 1 and operates in a cylinder 5 to force material through the nozzle 6 into the mould. An electric or other heater 8 is provided and metal ribs 7 may be provided to improve the heat conduction and guide the piston 4.. In a modification the two cylinders may be arranged parallel and side by side, communicating by means of an aperture of substantial cross-section so as to reduce the resistance to flow. In a further modification, one or more low pressure cylinders 2 may be provided at an angle to the main cylinder 5, as shown in Fig. 5, the cylinders communicating through a channel 9 of substantial cross-section. The pistons may be operated mechanically or hydraulically and a tap may be provided for the nozzle 6. The material may be supplied in the form of powder, blocks, or bars. The low pressure cylinder is generally of larger capacity than the high pressure cylinder and the latter may either fill a number of moulds on one charging or may make a number of strokes to fill a single large mould. The machine may have a multiapertured nozzle and, when making multicoloured mouldings, the mould may be successively presented to different injection units by indexing mechanism as in a turret lathe.
GB2297437A 1937-08-21 1937-08-21 Improvements in and relating to the moulding of thermoplastic materials by injection Expired GB501277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2297437A GB501277A (en) 1937-08-21 1937-08-21 Improvements in and relating to the moulding of thermoplastic materials by injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2297437A GB501277A (en) 1937-08-21 1937-08-21 Improvements in and relating to the moulding of thermoplastic materials by injection

Publications (1)

Publication Number Publication Date
GB501277A true GB501277A (en) 1939-02-21

Family

ID=10188057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2297437A Expired GB501277A (en) 1937-08-21 1937-08-21 Improvements in and relating to the moulding of thermoplastic materials by injection

Country Status (1)

Country Link
GB (1) GB501277A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443554A (en) * 1944-04-06 1948-06-15 Mattia Peter De Apparatus for molding plastics
US2454661A (en) * 1945-05-17 1948-11-23 Lester Engineering Co Extrusion machine for plastic material
US2485523A (en) * 1943-07-21 1949-10-18 Hpm Dev Corp Hydraulic injection of plastics as a continuous strip
US2505540A (en) * 1945-02-15 1950-04-25 Goldhard Franz Karl Injection molding apparatus
US2585112A (en) * 1947-09-08 1952-02-12 Gravesen Carl Christian Injection molding machine
US2616130A (en) * 1949-06-16 1952-11-04 Banz Friedrich Appliance for delivering plastic substances under high pressure
DE751116C (en) * 1940-09-27 1953-03-16 Siemens Schuckertwerke A G Injection molding machine for heat-elastic masses
DE1075116B (en) * 1960-02-11 Brüssel Henri Morren Process for the production of antihistam-active piperazmdenvates
US3182356A (en) * 1963-06-05 1965-05-11 Henry J Witkowski Plastic heating device
US20110287119A1 (en) * 2010-05-18 2011-11-24 Fellabaum Terence J Machine and Method for Producing Extruded Concrete Product
WO2013153333A1 (en) * 2012-04-12 2013-10-17 Getelec Micro-injection press
GB2514141B (en) * 2013-05-14 2015-11-04 Oxford Plastic Sys Ltd Injection moulding
CN114228072A (en) * 2021-11-19 2022-03-25 德清申达机器制造有限公司 High-pressure and low-pressure separated composite injection device and composite injection method

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075116B (en) * 1960-02-11 Brüssel Henri Morren Process for the production of antihistam-active piperazmdenvates
DE751116C (en) * 1940-09-27 1953-03-16 Siemens Schuckertwerke A G Injection molding machine for heat-elastic masses
US2485523A (en) * 1943-07-21 1949-10-18 Hpm Dev Corp Hydraulic injection of plastics as a continuous strip
US2443554A (en) * 1944-04-06 1948-06-15 Mattia Peter De Apparatus for molding plastics
US2505540A (en) * 1945-02-15 1950-04-25 Goldhard Franz Karl Injection molding apparatus
US2454661A (en) * 1945-05-17 1948-11-23 Lester Engineering Co Extrusion machine for plastic material
US2585112A (en) * 1947-09-08 1952-02-12 Gravesen Carl Christian Injection molding machine
US2616130A (en) * 1949-06-16 1952-11-04 Banz Friedrich Appliance for delivering plastic substances under high pressure
US3182356A (en) * 1963-06-05 1965-05-11 Henry J Witkowski Plastic heating device
US20110287119A1 (en) * 2010-05-18 2011-11-24 Fellabaum Terence J Machine and Method for Producing Extruded Concrete Product
US8944803B2 (en) * 2010-05-18 2015-02-03 Tec Products, Inc. Machine and method for producing extruded concrete product
WO2013153333A1 (en) * 2012-04-12 2013-10-17 Getelec Micro-injection press
FR2989301A1 (en) * 2012-04-12 2013-10-18 Getelec MICRO INJECTION PRESS.
GB2514141B (en) * 2013-05-14 2015-11-04 Oxford Plastic Sys Ltd Injection moulding
CN114228072A (en) * 2021-11-19 2022-03-25 德清申达机器制造有限公司 High-pressure and low-pressure separated composite injection device and composite injection method
WO2023088048A1 (en) * 2021-11-19 2023-05-25 德清申达机器制造有限公司 Separate high-pressure and low-pressure composite injection device and composite injection method

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