GB551468A - Improvements in and relating to the moulding of materials by injection - Google Patents

Improvements in and relating to the moulding of materials by injection

Info

Publication number
GB551468A
GB551468A GB1057241A GB1057241A GB551468A GB 551468 A GB551468 A GB 551468A GB 1057241 A GB1057241 A GB 1057241A GB 1057241 A GB1057241 A GB 1057241A GB 551468 A GB551468 A GB 551468A
Authority
GB
United Kingdom
Prior art keywords
preliminary
injection
cylinder
piston
mould
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
GB1057241A
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 GB1057241A priority Critical patent/GB551468A/en
Publication of GB551468A publication Critical patent/GB551468A/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
    • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • 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

Landscapes

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

Abstract

551,468. Injection-moulding thermoplastic substances. GRAFTON, H. Aug. 19, 1941, No. 10572. [Class 87 (ii)] A process wherein material is transferred by a piston from a preliminary cylinder into the injection cylinder, from which it is extruded by a piston through a nozzle into the mould, is characterized in that the material is transferred by subjecting it to a pressure higher than the extrusion pressure and the transfer is effected through an opening which is of smaller cross-section than the preliminary cylinder and is of such dimensions that the material is subjected to substantial preliminary heating by being forced through the opening into the extrusion cylinder, whereafter the material is heated to the extrusion temperature and extruded into the mould. This preliminary heating may be supplemented by external heating. Fig. 1 shows apparatus suitable for carrying out the invention. A piston 8 forces material from a preliminary cylinder 7 through a channel 11 in the injection piston 6. A ram 3 ascends to close the mould and then telescope the injection cylinder 5 over the injection piston. In Fig. 4 the two pistons are shown at rightangles and the material is fed to the preliminary cylinder in the form of a rod 20 which passes through a heated channel 18 ; this preheating and feeding arrangement may be combined with the process illustrated in Fig. 1. The preliminary feed and the injection feed may be interlocked electrically, mechanically, or hydraulically to ensure that retraction of the preliminary piston cannot occur during the injection stroke ; alternatively, the preliminary piston may operate independently and at a higher speed than the injection cylinder. The apparatus of Specification 501,277 may be used in performing the invention.
GB1057241A 1941-08-19 1941-08-19 Improvements in and relating to the moulding of materials by injection Expired GB551468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1057241A GB551468A (en) 1941-08-19 1941-08-19 Improvements in and relating to the moulding of materials by injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1057241A GB551468A (en) 1941-08-19 1941-08-19 Improvements in and relating to the moulding of materials by injection

Publications (1)

Publication Number Publication Date
GB551468A true GB551468A (en) 1943-02-24

Family

ID=9970327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1057241A Expired GB551468A (en) 1941-08-19 1941-08-19 Improvements in and relating to the moulding of materials by injection

Country Status (1)

Country Link
GB (1) GB551468A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501329A (en) * 1946-05-23 1950-03-21 Baldwin Locomotive Works Thermo-injecting molding process
US2754545A (en) * 1952-01-04 1956-07-17 Tube Turns Plastics Inc Injection machine
US2914804A (en) * 1954-06-28 1959-12-01 Projectile And Engineering Com Injection moulding apparatus
US3032810A (en) * 1960-06-02 1962-05-08 Owens Illinois Glass Co Method and apparatus for forming hollow plastic articles
US3049757A (en) * 1960-05-03 1962-08-21 Fmc Corp Injection molding machine
US3077002A (en) * 1956-06-04 1963-02-12 Studebaker Packard Corp Injection molding device
US3685937A (en) * 1969-03-05 1972-08-22 Thomas Paul Engel Injection moulding apparatus with dynamic impact injection assist means and control therefor
CN103640142A (en) * 2013-11-29 2014-03-19 灵璧县宏发电子加工有限公司 Vertical injection molding machine
CN103640193A (en) * 2013-11-29 2014-03-19 灵璧县宏发电子加工有限公司 Vertical injection molding machine provided with lighting device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501329A (en) * 1946-05-23 1950-03-21 Baldwin Locomotive Works Thermo-injecting molding process
US2754545A (en) * 1952-01-04 1956-07-17 Tube Turns Plastics Inc Injection machine
US2914804A (en) * 1954-06-28 1959-12-01 Projectile And Engineering Com Injection moulding apparatus
US3077002A (en) * 1956-06-04 1963-02-12 Studebaker Packard Corp Injection molding device
US3049757A (en) * 1960-05-03 1962-08-21 Fmc Corp Injection molding machine
US3032810A (en) * 1960-06-02 1962-05-08 Owens Illinois Glass Co Method and apparatus for forming hollow plastic articles
US3685937A (en) * 1969-03-05 1972-08-22 Thomas Paul Engel Injection moulding apparatus with dynamic impact injection assist means and control therefor
CN103640142A (en) * 2013-11-29 2014-03-19 灵璧县宏发电子加工有限公司 Vertical injection molding machine
CN103640193A (en) * 2013-11-29 2014-03-19 灵璧县宏发电子加工有限公司 Vertical injection molding machine provided with lighting device

Similar Documents

Publication Publication Date Title
US2828507A (en) Injection molding press having valved gate
DE887263C (en) Method and device for injection molding of thermoplastics
US2386966A (en) High-frequency electrostatic heating of plastics
GB551468A (en) Improvements in and relating to the moulding of materials by injection
US2436999A (en) Method and apparatus for plastic injection
GB1453276A (en) Presses for moulding plastics material
US2469342A (en) Method and apparatus for molding plastics
US2448676A (en) Method of injection molding
US2439966A (en) Injection molding
US2344176A (en) Method of and machine for molding plastics
DE2440987A1 (en) METHOD AND DEVICE FOR REDUCING THE VULCANIZATION CYCLE TIME IN THE INJECTION MOLDING OF RUBBER COMPOSITIONS
CN106626220A (en) Injection molding apparatus
GB974596A (en) Method and apparatus for the production of hollow bodies from thermoplastic materials
GB1292753A (en) Mixing and plasticating machine with a piston
US3843289A (en) Apparatus for transfer molding thermosetting materials
GB1235270A (en) Apparatus for feeding and preheating plastic molding resin in particulate form
USRE25313E (en) Means and method for making tubes
SU144012A1 (en) Injection unit for injection molding machine for processing thermoplastic polymeric materials
US2228721A (en) Machine and process for making linear molding of synthetic plastic materials
DE752704C (en) Extrusion process for the production of endless tubular pressed pieces from synthetic resin or molding compounds containing synthetic resin
GB577373A (en) Improvements in or relating to the moulding of thermosetting materials
GB611422A (en) Production of shaped articles from thermosetting or thermoplastic material
GB589148A (en) Improvements relating to injection-moulding of organic thermoplastic materials
GB507926A (en) Improvements in and relating to extrusion apparatus
ES377540A1 (en) Injection moulding apparatus with dynamic impact injection assist means and control therefor