US1745991A

US1745991A - Mold

Info

Publication number: US1745991A
Application number: US179633A
Authority: US
Inventors: Charles R Harry
Original assignee: J B Foote Foundry Co
Current assignee: J B Foote Foundry Co
Priority date: 1927-03-30
Filing date: 1927-03-30
Publication date: 1930-02-04
Anticipated expiration: 1947-02-04

Description

Feb. 4, 1930. c. R. HARRY MOLD Filed March so, 1927 2 Sheets-Sheet 1.

INVENTOR. /6.-... K, J

v. ATTORNEYS.

Patent ed Feb. a V

CHARLES R. HARRY, or rammitioxzrowmfomo. AssIeNoR To 'r-HE-a. 35 more FOUNDRY COMPANY, or rannnnroxrow v, OHIOyA coarormrrouor 0310 Application filed March 30,1927. "serial no. 179,633. 7 1

- This invention relatesto molds, more parads. ea an;madam. ma

' at the beginning. of the ejecting action and ticularly relating to molds designed for molding cement blocks and the like in Whichan for e ecting ejecting mechanism is employed the blocks from the mold.

An object of the invention is to rovldea mold of this character which will e simple I in construction and efiective in operation.

Afurther object is to improve the ejecting mechanism whereby great leverage is exerted the action of ejecting the block gradually accelerated until the block clears the mold.

A further object of the invention is to provide an ejecting mechanism so constructed that the molded article is brought slowly tov rest'without shock at the end of the e ectlng action and the ejecting mechanism automatically locked without the employment of catches or other separate locking devices.

Other objects will be apparent from the following description, claim and statement of advantages. 1 v

Inthe accompanying drawings: Fig. 1 is a side elevation of a mold embody ing the improvements. s Fig. 2 is a section on the line aa of Fig. 1. Fig. (i-is a sectionon the line b-b of Fig. 2. Referring to the drawings, 1 represents the side frames of the molding apparatus which are constructed in any suitable manner, but

are shouldered along their forward and rear edges to receive transversely extending bars 2 to which are secured by the cap screws 3 a series of. spaced-apart longitudinally extend- 7 ing horizontal supporting pieces 4: which form supports for the cores 5 which are arranged vertically in the mold box 6. QThis mold box is open at the top and is provided with a removable spout 7 to' guide the wet material into the interior of the mold'bo'x. Before the mold boxis filled with'the material to be Carried by each of the side frames1,mid

wayitslength is a stationary vertical guide rod 9 upon each of which is slidably'mounted a head 1-O;the side-frames having laterally 'ofiset channels 1 to accommodate these guide sleeve 11 sli-dably mounted on .th-efcorresponding'rod 9 and is also formed with an over;- hanging flange'12 and with laterally project ing arms 13. To the arms'13ar'e secured vertical push rods 14:, theupp'er ends of which project between the supports with their ex.-

.trjeme upper endsreduce'd as indic'atedin dot} ted linesat 1 1? with'the reduced en ds inserted 'Journaled theflower portions the framepieces 2is atransverse shaft16 to'one end of which is connected an operating lever 17 Fastene'd to this shaft are a pair of cam fingers 18, each havinga comparatively long cam surface. The effective low portion of each-cam finger it will be seen is located close to the center of the shaft 16 while'the extreme outer end of the cam arm is formed on the arc of a c1rcle whose center is the center of the shaft 16. Co-operating with each cam arm is, a comparatively long lifter arm 19,

each lifter arm being pivotally mounted 011 a cross shaft20 carried by the frame pieces. The free end of each lifter arm carries a roller 21 which lies immediately beneath the overhanging flange 12 of the head 10, this roller being journaled upon a stud 22 secured to the lifter arm, with the head of the stud?" countersunk in the inner face of the roller as shown in Fig. 3.

In operation; after the platen 8 has been inserted into the mold, and with the ,ejector c a i m in the position shown in full lines" in Fig. 2,'the mold is filled with the wet cement. To. eject the molded article after it has become "sufiiciently set, the operator grasps the handle 17 and turns the shaft 16.1 0. which causes a powerful leverage to be eX- erted by the lower effective surface of each of the cams 18 upon the arms ,19 which in turn through their rolls 21 lift theheads 1O,v

reason of the form of the cams 18, a tremendous leverage is exerted upon thearms 19at the beginning of the ejecting operation,

push rods 14 and platen 8 to eject the cement; a v

blocker other article from the mold. By

' I and-'thecement of the block, or other moldedioo article, is gradually accelerated until it clears the mold. At the end of the raising movement of the parts, the nose 18 of each of the cams Will engage the lifter arms, in the manner shown in dotted lines in Fig; 2, and hold the parts in raised position 'so.as to allow for.

the removal of the platen 8 together With the molded article carried thereon. By manipulating the lever 17, the cams will be caused to free the lifter arms and allow the head and push. rods to drop by gravity to their lower position.

claim:

In a mold, a supporting frame, a mold box supported thereby and open at one end, a pair of heads slidably carried by said frame, a platen in said'mold boX supported by said heads, each head being provided with an overhanging portion, a pair of lifter arms, one for each head, pivoted on said support With the free end of each lifter arm arranged to engage theunder side of said over-hanging portion of its corresponding head, an operating shaft, and a pair of cams secured to said shaft, one for each lifter arm.

In testimony vvhereof, I have hereunto set" my hand this 28 day of March, 1927.

7 CHARLES R. HARRY.

Having thus described my invention, I