DE290376C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

JVr 290376 CLASS 31 b. GROUP

The previously known vibrating machines work mostly in such a way that the Vibrating table with model and molding box is lifted, then suddenly on rigid or elastic pads falls, being hit by the shock or blow when on the pads the collapse of the sand is caused.

This lifting of the table top with on it

ίο required model and molding box A significant amount of effort on all machines, regardless of whether it is a questionable vibratory molding machine Compressed air, pressurized water or mechanical drive (crank, eccentric or Cam). This is also the case with the jolt-free vibratory molding machines full effort to lift the table top and the anvil is absolutely necessary because both initially move in the same direction because.

Avoiding this expenditure of force is the purpose of the invention and that in the following described machine, the novelty of which is that of a cranked crankshaft are always moved up and down in opposite directions from the vibrating table and anvil.

In the drawing, 1 is the molding table, which is guided through the stand 2 in the stand 3 is; the anvil 4 also leads to the stand 3, in which a multiple cranked Crankshaft 5 is mounted. The crankings of this shaft 5 are opposite to one another 'and that is the middle one through the push rod 6 and the cross head 7 with the guide punch 2 of the forming table 1 connected, while the two outer cranks by -the push rods 8 with the Cross heads 9 are connected. These are also guided on the stand 3 and on piston rods 10 attached with piston 11, on which latter the springs 12 lie to provide the anvil with a resilient support. The sleeves 13 serve as a stop for the piston 11. If the shafts by means of the If the pulley flywheel 14 is rotated, the table 1 moves downwards, the anvil 4 on the other hand upwards. So they get closer to each other, and eventually he hits Form table 1 on the exchangeable Änschlagklötze 15, the height of which is so dimensioned that the meeting already takes place before the cranks of the crankshaft 5 in their dead Points have been reached. The mold table and anvil therefore meet with a little less Speed on each other; there is a violent shock, which then collapses of the molding sand in the box caused / but with it the cranks over the dead point at the further rotation of the shaft 5 can go away, the springs 12 are switched on and the pistons 11 are movably guided in the anvil 4; the feathers will be so long pressed together until the cranks are past the dead point, whereupon at the further movement of the shaft 5 an upward movement of the forming table and a downward movement

downward movement of the anvil 4 takes place. The shaft is kept rotating as long as until the sand in the molding cup has become firm enough through the repeated knocks. The springs ii can also be arranged within the guide 2, while the Rods 10 are fixed in the anvil, or it can, in addition to the springs 12, at the same time such are arranged in the guide 2. The effect remains the same.

The major advantage of the machine is that the mold table and anvil are mutually exclusive compensate, so that their lifting and lowering does not require any force.

Claims (1)

Patent claim: Vibratory molding machine, in which the anvil and the molding table are moved against each other, characterized in that both by means of push rods from a crank or Eccentric shaft are driven, the crank or eccentric by 180 ° to each other are offset. For this purpose ι sheet of drawings.