GB551468A - Improvements in and relating to the moulding of materials by injection - Google Patents
Improvements in and relating to the moulding of materials by injectionInfo
- 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
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.
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)
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 |
-
1941
- 1941-08-19 GB GB1057241A patent/GB551468A/en not_active Expired
Cited By (9)
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 |
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