US1256739A - Molding-machine. - Google Patents

Description

C. H. STEELE & F. HLSCATTERGOODE MOLDING MACHINE.

APPLICATION EILED JULY 10, 1917.

15%56973Q. Patented Feb. 19, 1918.

4 SHEETS-SHEET K.

C. H'. STEELE 84 F. H. SCATTERGOOD.

MOLDING MACHINE. APPLICATION FILED IULY 10.191].

Patented Feb. 19, 1918;.

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The features of censtruc meat aiiter set receiving table 18. By so engaging the work receiving table with the base 1 it will be appre'ciated that the same may be adjusted vertically. To effect such vertical adjustment of the table 18, a screw-threaded shaft 19 is loosely engaged therewith and received through a screw-threaded boxing 20 secured to a laterally offset portion formed upon the bottom of the base 1. A beveled gear 21 is carried upon the upper end of the screwthreaded shaft and is in mesh with a similar gear 22 keyed to the adjacent end of a shaft 23 journaled in bearing brackets 24 upon the under side of the work receiving table and having a squared extremity in order that a suitable turning implement may beengaged with the same. Upon the upper face of the work receiving table 18 is a transversely disposed web 25, while mounted rearwardly thereof and arranged in a suitable depression or seat 26 is a compensating beam 27, serving for an obvious purpose.

To cause pivotal movement of the work table '13 pinions 28 are keyed to the opposite ends of the shaft 11 and mesh with rack elements 29 formed upon the roar extremities of pistons 29, the heads of which Work within cylinders 30 secured by bolts 31 or other suitable fastening devices to the opposite fcrward marginal portions of the sub base 7. By this form of gearing, when reciprocatory motion is imparted to the racks 29 the pinions 28 will be rotated in a direction to cause pivotal movement of the work table 13, the hinge elements 12 of which are keyed to the shaft 11.

As means for supplying motive fluid to the cylinders 30 a supply conduit 32 is em ployed and has the passage of the motive fluid therethrough controlled by a three-way valve 33 having an operating handle 34'connected to the plug thereof. Branch conduits 35 extend from several of the ports of the valve 33 into engagement with the heads of the cylinders 30. Thus. by moving the plug of the valve 33 to-open position through the medium of the handle 34 air or other suitable motive will be admitted to the cylinders 30. thereby causing reciprocatory movement of the pistons 29' and their respective rack portions 29.

A second supply conduit 36 is provided and has the passage of motive fluid therethrough regulated by a two-w ay valve 37,

the plug of which carries an operating handle 38, A branch conduit 39 communicates with one part of the valve 37 and with a cylinder 49 secured to one side of the cylinder 3. Within the cylinder 40 is mcvably arranged a spring balanced valve 41, the piston rod of which passes through a stufling gland 42 and is connected to an arm 43, a coupling 44 being interposed in the piston rod of the valve and normally engaged by a pivotal catch or trip 45 mounted upon-an. adjacent arm formed on the cylinder 40 and secured to the cylinder 3. An exhaust opening 46 is formed in the bottom of the cylinder 40 while a discharge port 47 is formed in one side thereof and communicates with. the port 4 formed in the cylinder 3. To another side of the marginal flange 7 is secured a bracket arm 48, which arm is in turn engaged with the arm 43. Due to the weight ofsub-base 7 with its several parts attached and connected thereto, resting upon and thereby forcing down spring balanced valve 41, thus opening ports 47 and 4, allowing airor motive fluid from two-way valve 37 to pass into cylinder 3, which forces upward plunger 6,7supporting sub-base 7 and work table 13, causing arm 43 attached to bracket=-- 'arm 48 to engage with stop or regulating nuts an. rod, Working into cylinder 40 which releases trip 45 from a holding contact with coupling 44, thereby releasing springbalm anced valve 41, which when so released is forced upward. opening passage for exhaust of air from cylinder 3. through ports 4, 47, 46 which when so exhausted from cylinder 3, permits piston 6 to abruptly lower therein. The shock of the impact caused by the abruptly descending piston 6 and the sub-base 7 is absorbed by the buffer blocks 4 and asa consequence. material vibration, such as may harmfully effect the controlling and operation mechanism of the molding machine Will be prevented.

To guide the sub-base 7. during its vibratory movementpdepending arms 49'are secured to the under face of the same and are slidably received in the guide brackets 5.

In operation the molding flask and pattern arc clamped on to the working table 13 and sand then placed in the same. Air is now admitted by way of the two-way valve 37 to the cylinder 40 and as a consequence,

will cause the intermittent raising and lowering of the piston, sub-base and working table, that is, imparting a vibratory movement thereto, which vibratory movement serves to efliciently tamp the molding sand about the pattern arranged in the flask, thus, allowing a perfect impression or duplication to be obtained from the pattern. When the molding sand has been properly tamped in the flask, the two-way valve 37 is closed, the

weaves sub-base assuming its lowermost position, At this time, the three-way valve 33 is opened admitting ai to the cylinders 30 and causing the pistons therein to be moved for.- wardly, thereby rotating the pinions 28 and causing pivotal movement of the work table 13. Such pivotalmovement of the work table will move the flask on to the work receiving table 18 which has been previously adjusted with relation thereto. W hen the flask is deposited on the work receiving table the piston 6 carrying the sub-base and working table is moved upwardly, thereby permitting'the withdrawing pattern from nished mold. The work table is then returned to original position and air exhausted from cylinder 3, piston worlr table 13 dropped to lowermost pos1- tion, while the pistons 29 are returned to normal positions in'their respective cylinders 30 byreversing flow of air or motive fluid thereinto readytor the making of other molds. v

Manifestly, the construction shown is capable of considerable modification, and such modification as is Within the. scope of our claims, we consider within the spirit of our invention.

lVe claim:

1. 111 a molding machine, a cylindrical base, a piston movable in said base and carrying a subbase, a table hinged to the subbase, andindependently operable pneumatic control means for moving the piston and hinged table, certain of said pneumatic con trol' means being connected to said sub-base and adapted to be intermittently actuated.

2. In a molding machine, a cylindrical base, a piston movable in said base and carshaft,

rying a subbase, a table hinged to the subbase, intermittently operable pneumatic control means for causing vibratory movement of the piston and subbase, said control means being connected to the subbase and operated thereby, and other pneumatic control means for imparting movement to the hinged table.

3. In a molding machine, a cylindrical base, a piston movable in said base and carrying a subbase, a shaft mounted in bearings upon one side mounted on the opposite extremities of said a table mounted on said shaft and movable therewith, pneumatically operated racks meshing with said pinions,

6, with sub-base '7 and of said subbase, pimons controlling the passage of air to pneu matically operated racirs, other pneu- H MW matic control means for causing VlUITZttULy movement of the piston.

4. inv a molding machine, a cylindrical base, a piston movable in can It rying a subbase, a shaft 11: u I ings to one side or the subbase, keyed to the opposite of work; table -mounted on recvef said shaft, pneumaticdl; meshing" with said pinio 's, r trolling passage of air to the pneumatica actuated racks, tether contro means for causing vibratory movemem t i b e r 1 the pis on and sub. ass,

an a'vertically jus'table'work receiving table secnredto on side of said base.-

5. In a molding machine, cylindrical base, a piston movable in said. base and rying a'subbase, a shaft mounted be to one side of the subbase, inio the opposite ends of, said p cally actuated racks meshing ions, means for controlling air to the pneumatically actuated adjustable work receiving table one side of the base, and pneumatic means operable upon movement or base for causing vibratory movement to. same and said piston.

6. In a molding machine, base, a piston movable said rying a subbase, a shaft mount to one side of the subbase, a on and movable with the s I keyed to the opposite ends of the s 1 matically actuated racks mes pinions, pneumatic control me lating the passage of air to sa cally actuated racks, a vertica I work receiving table secured to and a spring balanced air con communicating with said cyiin ableupon movement of t e subc ing vibratory movement or the M. said piston.

In testimony whereof we affix our signatures hereto.

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