US1727851A - Vulcanizing mold - Google Patents

Description

' Sept. 10, 1929. J. F. ALLEN VULCANIZING MOLD Filed Jan. 17, 1925 Patented Sept. 10, 1929.

. UNITED STATES HIMROD ANI) ONE-THIRD T EDW'ARD E, ALLEN, BOTH OF ERIE,` PENNSYLVANIA.

VULCANIZING MOLD.

Application filed January 17, 1925. Serial No. 3,167.

This invention is designed to improve vulcanizing molds, particularly such molds as are used for vulcanizing battery boxes. In the vulcanizing of such boxes a core is required which vulcanizes the interior of the box. Difliculty has been experienced in forming the core sections, where there are a plurality of them as is common with battery boxes, so as to retain their shape under heat and to present a surface which can be readily detached from the rubber after vulcanizetion. Certain mold formsv at the edges of the box have presented diiiiculties of construction particularly where the parts are subjected to the tremendous strains to which these parts are subjected in forcing the plastic material to the diderent parts of the box under the pressure of the press. With the present invention, the cores are of suiiicient strength to retain their shape and adjustable so as to maintain the walls of the box, the sections being provided with. thimbles giving a material more readily detached from the rub ber than materials having the desired strength for the bodyy of the core. The present invention also obviates the difficulty as to the pattern shapes. Other features and details of the invention will appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a side elevation of a portion of a press with a core in place, partly in section.

Fig. 2 a view of a portion of a press at right angles from that shown in Fig. 1.

Fig. 3 a section of the core on the line 3--3 in Fig. 1.

Fig. 4 a section on the line 4-4 in Fig. 1.

1 marks the head of the press, 2 the rods extending from the press to the usual base (not shown), 3 a steam-heated plate secured to the head by screws 3, and 4 the usual dowel pins for assuring the registering of the ram 45 (not shown) with the head.

The core is supported on a plate 5. Rods 6 are screwed into the sides of the plate 5. These have the heads or Lip-turned ears 7 opposing the faces of the plate 3 and screws 8 are screwed through the ears against the plate of adjustment by means of the screws 8 for the plate 5. f

The core base 9' extendsfrom the plate 5.1

This base has slots 10 forming the `core projections 11. Thimbles 12 extend over the proj ections 1.1 and are secured thereon by screws 13 extending through the bottom of the thimble into the bottom of the projection. c

The base 9 with its projectionsll are preferably made of steel and the thimbles are preferably of aluminum or some similar maferial readily detaching itself fromr the rubber. The interposing of the thimbles between the projections 1l make it possible to make the slots 10 wide enough so that they can be readily machined, the space between the thimbles representing thethicknessof the partitions in the battery box and being rquite narrow.

n It is sometimes desirable to form some pattern around the top edge ofthe box and it is diiiicult to form this pattern on the face plate of the mold. wWith the present inventionthis is accomplished by inserting a pattern plate 14 between the bottoms of the thimbles and the base plate, the plate 14 being clamped by the thimbles on the plate. `ln the present instance the pattern plate has a rib 15 surrounding each core projection, thus forming a groove in the top face of the battery y boX.

The present construction forms a very rigid construction which readily sustains the strains to which the core is subjected in putting the material under pressure as it is initially formed in the box. It permits of the use of integral projections of steel witha facing of material which will `readily detach from the rubber at the completion of vulcani'- Zation and it also permits of the ready adjustment of the core so as to maintain an equal thickness of walls of the box. j

What I claim as new is 1. In a battery box mold,the combination of a core base plate; core projections formed on the base plate; thimbles arranged over the projections; and a pattern plate clamped between the thimbles and the base plate.

ENT Uceri(n.1.

JOHN F. ALLEN, 0F Earn, PENNSYLVANIA, AssrGNon kor yoms-THIRD@ .LALLIsoN 2. In a battery box mold, the combination of a core base p1ate;core projections formed on the base'plate; thmbles arranged over the project-ione; .and a pattern plate clamped be- Y tween the thmbles and the base plate, said patternV plate-having ypattern ribs surrounding each projection.

In testimony whereof I have hereunto set my hand.. v

JOHN F. ALLEN.

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