GB1483741A - Injection moulding control system - Google Patents
Injection moulding control systemInfo
- Publication number
- GB1483741A GB1483741A GB3257374A GB3257374A GB1483741A GB 1483741 A GB1483741 A GB 1483741A GB 3257374 A GB3257374 A GB 3257374A GB 3257374 A GB3257374 A GB 3257374A GB 1483741 A GB1483741 A GB 1483741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control
- injection moulding
- control system
- ram
- present
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1483741 Control of injection moulding HUNKAR LABORATORIES Inc 23 July 1974 [19 Oct 1973] 32573/74 Heading G3N An injection moulding machine is of the type having a ram 16 which, when it advances (to the right in Fig. 1) injects plasticized material into a mould cavity 23 and when it retracts rotates to plasticize the material to be injected in the next advance phase. The invention consists in a control system for such a machine, the general organisation of which is broadly the same as in the system shown in Fig. 1 of Patent No 1411112 (which is referred to). The principal differences between the present system and that of the prior patent are the substitution of a single flow-divider valve 43B for two independent flow-control valves (45, 52) and the fact that, in the present case servo-control of the ram is continuous throughout each advanceretract cycle. Another difference between the present and the prior patent is that not only the advance but also the retract are limited by pressuresensitive control elements, the single pressure transducer (72) of the prior case being replaced by two such transducers 48, 101. A control system incorporating this two-pressure-transducer arrangement is claimed in Specification 1483742. Fig. 2 (not shown) is a block diagram illustrating the inter-relation of the control functions performed by the Fig. 1 apparatus in use. Figs. 3 and 4 (not shown) depict sub-systems whereby, during the retraction phase, appropriate variations in back pressure and rate of screw rotation are obtained.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/407,994 US3941534A (en) | 1971-11-01 | 1973-10-19 | Injection molding control system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1483741A true GB1483741A (en) | 1977-08-24 |
Family
ID=23614406
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3257374A Expired GB1483741A (en) | 1973-10-19 | 1974-07-23 | Injection moulding control system |
GB1462777A Expired GB1483742A (en) | 1973-10-19 | 1974-07-23 | Injection moulding control system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1462777A Expired GB1483742A (en) | 1973-10-19 | 1974-07-23 | Injection moulding control system |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS545423B2 (en) |
CA (1) | CA1013835A (en) |
DE (2) | DE2445158A1 (en) |
FR (1) | FR2248142B2 (en) |
GB (2) | GB1483741A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2528963C2 (en) * | 1975-06-28 | 1983-11-03 | Karl 7298 Loßburg Hehl | Control device for the hydraulic circuit of an injection molding machine |
JPS5549238A (en) * | 1978-10-05 | 1980-04-09 | Toshiba Mach Co Ltd | Plasticizing process controlling method for in-line screw type jet-form machine |
JPS55121037A (en) * | 1979-03-13 | 1980-09-17 | Toshiba Mach Co Ltd | Speed control system for injection plunger in injection molding machine |
DE3204756A1 (en) * | 1982-02-11 | 1983-08-18 | Peter Prof. Dipl.-Ing. 7080 Aalen Wippenbeck | METHOD FOR FILLING A MOLDING TOOL WITH PLASTIFICABLE MATERIAL BY MEANS OF AN INJECTION PISTON OR A PUSHING SCREW ACTING AS AN INJECTION PISTON, AND DEVICE FOR CARRYING OUT THE METHOD |
DE3404927C2 (en) * | 1984-02-11 | 1994-05-05 | Bosch Gmbh Robert | Hydraulic control device for the injection unit of a plastic injection molding machine |
JPS60260969A (en) * | 1984-06-08 | 1985-12-24 | Fuji Xerox Co Ltd | Multicolored picture image recording device |
JP2004009385A (en) * | 2002-06-04 | 2004-01-15 | Japan Steel Works Ltd:The | Hydraulic circuit of ultra high-speed injection molding machine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3767339A (en) * | 1971-11-01 | 1973-10-23 | Hunkar Instr Dev Labor Inc | Injection molding control |
-
1974
- 1974-02-13 CA CA192,430A patent/CA1013835A/en not_active Expired
- 1974-03-19 FR FR7409224A patent/FR2248142B2/fr not_active Expired
- 1974-03-25 JP JP3337274A patent/JPS545423B2/ja not_active Expired
- 1974-07-23 GB GB3257374A patent/GB1483741A/en not_active Expired
- 1974-07-23 GB GB1462777A patent/GB1483742A/en not_active Expired
- 1974-09-18 DE DE19742445158 patent/DE2445158A1/en active Pending
- 1974-09-18 DE DE19742462552 patent/DE2462552A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS545423B2 (en) | 1979-03-16 |
JPS5073956A (en) | 1975-06-18 |
CA1013835A (en) | 1977-07-12 |
FR2248142A2 (en) | 1975-05-16 |
FR2248142B2 (en) | 1977-10-07 |
DE2462552A1 (en) | 1977-09-15 |
DE2445158A1 (en) | 1975-04-24 |
GB1483742A (en) | 1977-08-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920723 |