US1874635A - Molding machine - Google Patents

Description

Aug. 30, 1932. c. F. SCHERER MOLDING MACHINE Filed April 26. 1930 2 Sheets-Sheet i C FSCHEFE'H. INVENTOR.

30, '1932- c. F. SCHERER ,374,635

MOLDING MACHINE Filed April 25, 1930 2 Sheets-Sheet 2 Cf. 15' CH EfiEfi- INVENTOR.

I BY W7 7 A TTORNEY Patented Aug. 39, 1932 i} amass stares arsh r orne s Giana-nasal 'sonnnnn; onnnvnnronir, sown, Assmnon To'nAvENronT "M'ACHIEIE AND} FoUNnRa'coMPnnY; orjnnvnnroaniowngn- CORPORATION oF'IowA 5 MOLDING Mac-mun.

.' Application filed A'pzil26,

v The present invention relates to molding machines and more especially to a rollsover machine-in which the actuating mechanism is encased so as to preventsand from get- 5 ting into the wearing parts and causing undue wearing thereof. I I

Among the objects of this invention are to provide in a machine of the character indicated means for keeping sand and other ibradents away from access to parts subject to considerable wear; to provide adjusting means to compensate for diilerent loads so that the pattern plate and its load will always pass dead center when being :urned over from one side to the other; to provide an enclosed check cylind r by means of which the descent of the roll-over arms and their load may be checked so that the load will be set down without any sudden .29 jolt; and such further objects, advantages and capabilities as will hereafter appear and as are inherentin the construction disclos d herein. My invention further resides in the combination, construction and arrangement 31 parts illustrated in the accompanying drawings and, while I have shown therein what is now consid red the preferred embodiment of this invention, I desire the same to be understood as illustrative only and not '.'0 be interpreted in a limiting sense.

In the drawings annexed hereto and forming a parthereof, Fig. 1 is a fragmentary side elevation of a structure embodying invention with parts thereor broken away for the sake of better illustration; and 2 is a plan view of the structure shown in Fig. 1 with the cover can thereof removed to show th interior mechanism.

Referring more in detail to the annexed drawings, casino; 1 is shown as provided with a cap 2 which may be removed therefrom by removing certain bolts 3' passing through a ring; 4 a d into the cover 2. This ring is secured to the casing l by means of bolts 5. It will be obvious from 2 that the casing and its cover have depressions in the ends thereof, which permit the rin and bolts 3 and 5 to es set in so that they will not project beyond the ends of the casing. I will also be obvious from Fig. 1 that it 1930. Serial my. 447,564.:

will only be-necessary to remove two bolts 3 at each endloftlie machine toentirely release thev cover Q'trom the casing 1'. Since the top of the'casingand'the bottom of'the cover are made to'fit: closely, there will be no trouble Pith sand or other gritgetting' inside 01 the casing. and into the operating mechanism therein.

Mounted in the lower part of the casing 1 is a supportinq. shaft 6 upon which are mountedthecheck cylinden 7 and the lifting cylinders 8. Piston rods 9 and lo'connect the piston heads-in these cylinder-s with appropriate means, as indicated in Fig. 2, whereby turning forcemaybe transmitted to the rollover arms. Each piston rod has an eye 11 atits free end by means of which connection is made to -a yoke 24'. v This yoke 121$ arms which are designated in F 2 by the numerals 12. Itv will be seen that as the pistons in cylinders 8 are moved upwardly the roll-over arms 14 swing; in vertical" circles and the piston 15in check cylinder 7 simultaneously moves upwardly but at a slower rate' When the roll-over arms 14: and pattern-plate carried thereby pass dead center .andl begin to move downwardly on the. other side,,the check cylinder 7 may come into play, thereby, checking the descent oi the oad and: permitting it. to come to rest V upon the supporting table. I i The ends ofthe trunnions are squared as indicatedat 1-7 and the roll-over arms have openings ofthe same size and shapeso that they fit closely these squared portions oft'he trunnionsv Therefore, power applied by meansof the cylinders 8 is transmittedto the roll-over arms 14' in a manner which will be readily understood. The plates 18, .19, 20 and 21 constitute composite arms connectingthe yoke 2 l with: the trunnions of" the roll-over arms. iBy comparison of Figs. 1 and 2 it willbe seen that when bolts 22' are removed from these composite arms the parts 19 and 21 may. be moved relatively to 18 and '20 until the desired adjustment is secured when the bolts may be reinserted and tightened up into holding. position. WVlien the proper adjustment hasbeensecured', the bolts 23: will be tightenedup toassistiin holdingthe'parts together as if constructed unitary. Particular reference is now made to Fig. 1 from which it will be'seen that there are five positions of adjustment which the arms 18 and 19 (and also 20 and 21) may assume relatively to each other. As illustrated in this figure, the arms are in mid-position, it being possible to adjust either upwardly or downwardly two points from the position illustrated. In this way, there is provided a wide range of adjustment for the parts.

As shown clearly in the drawings, a concave con nectin bar joins the plates 19 and 21, making a unitary yoke. Also, webs 25 are connected with the concavebar and have the shafts 13 mounted in openings therein. These shafts are also mounted in openings in the bosses 26 formedon the plates 19 and 21. It will therefore be seen that the piston rods 10 are not adjustable relatively to a crank arm though there is relative adjustment between the crossbar or yoke 24 and the roll-over trunnions. Therefore, adjustment is permitted between the cross bar 24 and the pattern-plate, with the load carried thereby.

It will be seen from the foregoing description, taken in connection with the annexed drawings, that I have provided a simple mode of preventing any appreciable amount of grit from entering the bearings of a machine of this type, as well as preventing same from getting into check and roll-over cylinders and causing unnecessary wear thereof. It will also'be seen that means for accomplishing adjustments to compensate for changes in location of the center pf ravity of the rollover'arms and their Having now described my invention, 1 claim: a V I p 1 In a roll-over machine, a closed casing having bearings in opposite sides thereof, trunnions mounted in said bearings, operating arms rigidly connected with said trunnions, operating means within the casing and having movable connection with said arms, the means connecting theoperating means to the arms being shiftable from place to place to compensate for changes in location of the center of gravityof the roll-over arms and their load, the casing being adapted to preventaccess of sand or other. grit to the moving parts within'the casing.

2. In a roll-over machine, a support having .bearings in opposite sides thereof, trunnions,

, mounted in and rotatable within the'bearings,arms rigid with the trunnions and extending laterally therefrom, a cross bar havtransverse arms, said operating means having relatively fixed pivotal connect-ion with the yoke whereby actuation of the 0 rating mechanism. will cause rotation of t e trunnions and with them of the roll-over arms.

In witness whereof, I hereunto subscribe my name to this specification.

CHAS. F. SCHERER.

have provided simple a ing armsextending laterally therefrom, said f I last mentioned arms being capable of being connected to the first named arms, the two sets of arms being adjustably connected by re-. movable securing means by means of which they may be secured together in any one of several positions of adjustment.

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