GB543840A - Improvements in and relating to pneumatic-hydraulic die-casting and injection-moulding machines - Google Patents
Improvements in and relating to pneumatic-hydraulic die-casting and injection-moulding machinesInfo
- Publication number
- GB543840A GB543840A GB1153240A GB1153240A GB543840A GB 543840 A GB543840 A GB 543840A GB 1153240 A GB1153240 A GB 1153240A GB 1153240 A GB1153240 A GB 1153240A GB 543840 A GB543840 A GB 543840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- pressure
- reservoir
- space
- head
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
- B29C2045/6792—Combined pneumatic-hydraulic cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
543,840. Hydraulic presses ; casting-machines. TOWLER. J. M., and TOWLER, F. H. July 11, 1940, No. 11532. [Class 69 (ii)] [Also in Groups V and XXII] A hydraulic press suitable for use as a pressure casting-machine has its ram movement in both directions effected against a resilient resistance which decelerates the speed towards the end of each stroke and accelerates it at the beginning. In the press shown in Fig. 1 the space 8 in the fixed cylinder 4 is under constant liquid pressure from a reservoir 13, containing compressed air, via pipes 15a, 15, non-return valve 16, and pipe 15. When the spindle 22 of the control valve 14 is moved into the position shown in broken lines the space 10 is connected to exhaust 20 via a pipe 19 and the head 6, rods 7, and head 5 move to the right compressing springs 7a which decelerate the latter part of this movement. At the same time the valve 14 connects the high pressure supply 17 to the pipe 15b via the pipe 18 so that the final pressure of the head 5 is high. When the spindle 22 is moved into the position shown in full lines the space 10 is connected to high pressure, via pipes 17, 19 and the space 8 to the reservoir 13, via pipes 15b, 18, 23, and 15a, so that the heads 6, 5 move to the left with a motion accelerated at first by the springs 7a and decelerated at the end by the increased pressure in the reservoir 13. The machine may include a rod 29, for forcing molten metal or other material or inserting a nozzle into a mould M, which is moved to the left by high pressure fluid supplied to the space 26, via pipes 32, 17, when a spindle 21 is in the position shown and to the right by air or gas pressure, constantly applied by the reservoir 13 and a pipe 30 to the space 28, when the space 26 is connected to exhaust by moving the spindle 21 into the position shown in broken lines. In a modification the rod is operated by a double acting piston constantly urged to the right by liquid from the bottom of a separate reservoir, also containing compressed gas, and to the left by high pressure fluid from the valve 14 &c. In another modification the rod 29 is moved to the left by the head 5 engaging a flange 36, Fig. 3, thereon and to the right by fluid from a similar reservoir 35 admitted through a valve 37 positively opened by a piston 38 actuated by the high-pressure fluid from the valve 14, the valve 37 opening automatically, against the action of a spring to return the fluid to the reservoir on the plunger 33 moving to the left. In the press shown in Fig. 6 the head 5 is moved from position x to y, by previously compressed springs 46, by releasing the pressure in cylinders 45, fluid being admitted to the cylinder 43 by opening a valve 44. The stroke is completed and pressure applied to the work by closing the valve 44 and by admitting pressure fluid to the cylinder 43 opening the valve 14. The last part of the stroke compresses the springs further and this energy is used in the return stroke by reversing the functions of the cylinders 43, 45. In a modification, to make use of the acceleration due to gravity, the springs 46 are omitted and the press arranged vertically with the cylinder 43 uppermost.' If desired catches may be used in this modification to retain the head 5 in its highest position, instead of or in addition to the lifting cylinders 45. Specifications 499,509, [Group XXVIII], and 526,242 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1153240A GB543840A (en) | 1940-07-11 | 1940-07-11 | Improvements in and relating to pneumatic-hydraulic die-casting and injection-moulding machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1153240A GB543840A (en) | 1940-07-11 | 1940-07-11 | Improvements in and relating to pneumatic-hydraulic die-casting and injection-moulding machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB543840A true GB543840A (en) | 1942-03-16 |
Family
ID=9987951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1153240A Expired GB543840A (en) | 1940-07-11 | 1940-07-11 | Improvements in and relating to pneumatic-hydraulic die-casting and injection-moulding machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB543840A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106003637A (en) * | 2016-06-24 | 2016-10-12 | 芜湖市万华塑料制品有限公司 | Pressing control device for injection mold |
-
1940
- 1940-07-11 GB GB1153240A patent/GB543840A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106003637A (en) * | 2016-06-24 | 2016-10-12 | 芜湖市万华塑料制品有限公司 | Pressing control device for injection mold |
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