US1832020A - Hydraulic mold and press - Google Patents

Hydraulic mold and press Download PDF


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US1832020A US459724A US45972430A US1832020A US 1832020 A US1832020 A US 1832020A US 459724 A US459724 A US 459724A US 45972430 A US45972430 A US 45972430A US 1832020 A US1832020 A US 1832020A
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Harold E Hammer
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Harold E Hammer
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    • B30PRESSES
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022Moulds for compacting material in powder, granular of pasta form


Nov. 17, 1931. H. E. HAMMER HYDRAULIC MOLD AND PRESS 3 Sheets-Shet Filed June 7. 1930 ATTORNEY.
Nov. 17, 1931. H. HAMMER HYDRAULIC MOLD AND PRESS Filed June 7, 1930 3 Sheets-Sheet 2 m a FpJ l O k 7.5 y 7 X T 7g max A a INVENTOR. aro//fi/yxmme/g A TTORNE Y.
Nov. 17, 1931. H. E. HAMMER 1,832,020
HYDRAULIC MOLD AND PRESS Filed June 7, 1930 3 Sheets-Sheet 3 f I INI' EN TOR.
/%ro/a A /%mme7z "z, v.94 B}& Q Q 77 5 M ATTORNEY.
Patented Nov. 17, 1931 UNITED STATES HAROLD E. HAMMER, OF DALLAS, TEXAS HYDRAULIC MOLD AND rnnss 7 Application filed June 7, 1930. Serial No. 459,724.
My invention relates to improvements in molds and presses for molding objects of a solid or hollow nature with or without designs or panels, and relates further to certain mechanical features whereby such articles may be molded by hydraulic pressure.
The primary object of my invention is to provide a molding apparatus of this nature whereby any moldable or plastic composition may be molded under heat of high temperatures or of low temperatures, or a combination such that there may be a change of temperature from hot to cold, or vice versa; or that one part of the mold may be one temperature or changeable temperature, and another part of the mold may be the same or different temperature.
My invention further provides a molding apparatus of the nature referred to whereby articles may be molded almost automatically and very quickly with less consumption of hydraulic power than is usually required.
In the drawings forming part of this specification:
Figure 1 represents a front elevational view of the apparatus embodying my invention, the view partly in section.
Figure 2 is a side elevational view thereof, partly broken away.
Figure 3 is an enlarged detail sectional view of the upper stationary platen and the lower platen and illustrating the mold parts, preparatory to compressing the molding material.
Figure 4 is view similar to Figure 3 and illustrating the platens in a further advanced position preparatory to compression of the material.
Figure 5 represents an enlarged detailed 40 view of the platens and mold parts when fully compressed down upon the material being molded, the view being partly in section.
Figure 6 is a cross-sectional View, taken along the line 6-6 of Figure 3.
Figure 7 is a cross sectional view taken on the line 7 7 of Figure 4.
Figure 8 is an enlarged perspective view of the upper part of the plates forming the mold box; and
Figure 9 is a detail View showing rabbeted connection of the upper plates of the mold box from the bottom. 9
In carrying out my invention I provide a press having a base 1, including a cylinder 2 and the usual movable ram 3 which carries on its upper end the lower or movable platen 5. On this lower platen is mounted the detachably secured core or cores consisting of one or a plurality of core parts, or the male part of the mold 6. For the purpose of illustration I have shown the male part of the mold 6 of a form for molding a battery box of bituminous material, which material sets in aboutone minute, and my improved apparatus embodied in the press, which can be operated by a competent operator in a fraction of a minute, molds the article almost automatically. The mold 6 is cored or drilled to permit the circulation of any heating or cooling fluid or gas. This core is designed to form the inside, and fitted to co-operate with the plates, and thus at the lower head, seal the mold at 2, thus preventing the stock from coming out, as pressure is exerted on the material.
Thelower platen is movable up and down and guided by the strain rods 7. The up er or stationary platen 4 carries the detachably secured and hinged plate assembly, or female part of the mold, by any means such as with bolts. There is provided an upper cylinder 8 secured to the upper head or stationary platen and the piston 9 through which the piston rod 10 transmits power to the cross head 11 which moves the mold ring or die box or plate clamping member 12 by the rigid rods'13. The mold ring or die box 12 is cored or jacketed to permit heating or cooling, and provides a means for retaining the mold plate or lining tightly. The inside is machined at an angle, or tapered, so as to wedge the female part of the mold or plates tightly together. This mold box is prefer ably guided from lateral motion by bearings in the head where the rods pass through.-
Hooks 14 being fastened to the extended rods 13 are likewise rigid with the mold ring, and are jointed to swing outward, so that when they are held outwardly and high pressure fluid admitted under the piston, the
lower platen is not pulled up, as these hooks ordinarily function while in production. Thus the lower or male part of the mold may be easily cleaned, inspected or repaired.
Adjustably screwed onto the rods 13 are nuts 15 or collars which force down upon a forked lever 16 after the -mold ring has cleared-the bottom of the hinged plates 17, and thus with the point x as a fulcrum, lift plate operating ring 18 which in turn automatically pulls up the hinged plates 17 through plate operating rods 19.
The ate assembly consists of two end plates 1 7, two side plates 17 and an upper plate 17 which are hinged as shown, thus being articulated. These end and side plates open out mechanically and release the molded article to the operators hand, which is placed under the plate vassembly, after the mold ring has'cleared the bottom of the plate sufficiently. v
The inside of these plates are machined to give the desired outside appearance on the molded object as to paneling, shape or design. The outside of the plates are tapered to conform with the inside of the mold ring, and thus are held tightly at the rabbeted corners to give very little fin or flash on the finished product. The complete mold, therefore, consists of mold plates and core, with intervening space to form the molded object.
To overcome friction and assure positive plate closure, I have provided springs Y under the forked levers 16, or a cable, running up above and over a pulley to a suspended weight which will assure positive closure. It may be desirable to haveone plate, preferably the front or operating side plate as at 17' to open up higher than the side plates in case the press is narrow and thus permitting only the end plates to open enoughto free the molded object. In this case the lower nuts of one of the rods 19 are removed, in order to facilitate this further movement, and the operator, with one hand, insures the closing of this front plate. Also it may be advisable to have the hooks 14 long enough in many cases, so that the mold ring will move up sufficiently before pulling up the core or cores and lower platen, to give access for cleaning or lubrication on the core or closing part of the core 6 to reduce wear and gouging, and allow the mold ring to tightly close the plates before the stock has received pressure. Also this advance movement of the mold ring will bring the material to a condition where hydraulic pressure is required and give time for the operation of the main ram change to high pressure, while the stock is practically under no strain or pressure.
By use of the upper cylinder, which is usually small and takes but a small quantity of high pressure fluid, the major movement of the main ram which is large,-re-
spectively, is actuated without the expense of a low pressure pump, and extra and complicated and costly valve, or the use of a large quantity of costly high pressure fluid, to bring the main ram to the uppermost position where high pressure is required to compress or force the stock to the required shape and density.
In the operation of the apparatus, when the mold ring is down against the lower platen and the )lates ooened a wei hed mass of plastic material A is rolled into a ball, and placed on the core or male part of the mold. Hydraulic power is applied under the piston, while the lower ram is connected to a reservoir of fluid overhead, and thus the mold ring is brought up, then the core with its lower platen and main ram, by means of the hooks, or other mechanical devices or linkages. Vhile the main ram is traveling upwardly, reservoir fluid flows into the main cylinder. By the time the top of the mold ring reaches a position near the bottom of the plates, the latter have closed automatically, since the nuts 15 on the rods 13 have moved up, thus plate operating ring 18 is forced down by spring Y or cable previously mentioned closing the plates. The mold ring, continumg up, encircles the plates and continues to lift the main ram, lower platen and 1 core, and the material begins to press or spread out to the form in the mold. As the mold ring comes up to the uppermost position, or against the head or upper platen, the plates are wedged tightly together. At this uppermost position of the mold ring, the lower cylinder connection is cut off from the reservoir as at B and connected to the hydraulic line, thus closing the mold under high pressure. After the plastic material has set, the main cylinder is cut off from the hydraulic pressure line and again connected to the reservoir at B. Hydraulic pressure is applied above the piston and forces the mold lea ring, likewise main ram, lower platen and the core, down, thus breaking the mold. As
actuated rams, a stationary platen carried on the upper ram, a movable platen on the lower ram, a bed plate and portion of a mold carried on the movable platen; a plurality of plates swingably mounted on the under side of said upper platen and constituting the a3;
upper part of the mold; and a mold clamping member for holding the complete mold parts in molding position; said plates and clamping member being tapered so as to wedge the plates onto and around the lower part of the mold; said plates having their inner surfaces machined to provide'desired outside appearance of the molded article and rabbeted at the corners of the plates to eliminate fin or flash of the article molded.
2. A molding press of the character described, comprising an upper ram and a lower ram, each ram having a platen and carrying mold parts; the mold parts of the upper platen mounted to be swung outwardly and inwardly in the molding operation in bringing the parts of the mold together and in releasing the article molded; said movements being accomplished by means pivotally mounted on the upper platen and having connection with said upper mold parts, in conjunction with a cross head carried by the upper ram, whereby said upper mold parts are swung laterally as the cross head is moved vertically.
3. A molding press of the character described and as claimed in claim 2, said means for accomplishing the swinging movement of said upper mold parts including parts associated with said cross-head for imparting a positive opening and closing movement to the upper mold parts.
a. A molding press of the character de scribed and as claimed in claim 1, and including a piston and a rod, said rod connected to a cross head, rods carried on the cross head and traversing said upper platen and having members pivoted to their lower ends, whereby said lower platen is raised upwardly in bringing the upper and lower mold parts together in the molding of the article; and means carried on the rods for actuating the opening and closing means for moving said upper mold parts to and from closed position.
A. molding press of the character described and as claimed in claim 1, said plates being hin ed to the upper platen and designed to be moved outwardly to release the molded article; one of said plates adapted to be raised higher than the others to accommodate the structure to restricted space.
In testimony whereof I affix my signature.
US459724A 1930-06-07 1930-06-07 Hydraulic mold and press Expired - Lifetime US1832020A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487703A (en) * 1947-04-05 1949-11-08 C L Gougler Machine Company Press for molding battery boxes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487703A (en) * 1947-04-05 1949-11-08 C L Gougler Machine Company Press for molding battery boxes

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