JPH0216850Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention involves taking out a cast product from a vertical frameless mold that has already been poured, and pulverizing the mold to produce recycled sand for mold making. This invention relates to a mold disassembly device.

(Prior art) Conventionally, after the cast product has been removed from a poured vertical frameless mold, it is crushed into sand by a shake-out machine, and the sand is uniformly recycled sand for mold making. It is said that

By the way, in a mold that has already been poured, the sand in the sprue, runner, mold, etc. has lost its viscosity as the binder has been burned away by the heat of the molten metal, whereas the sand in other parts has lost its viscosity to some extent. maintains the viscosity of
In this way, when pouring molds with different viscosity depending on the part are crushed into sand and recovered, and the recovered sand is uniformly recycled as foundry sand, it is difficult to determine the amount of binder to be added to the sand. occurs.

In other words, if the amount of binder to be added is determined based on sand with no viscosity, the amount to be added will be large and the binder will be oversupplied for sand that maintains a certain degree of viscosity. Molds made from sand have poor air permeability, and there is a risk of gas defects occurring during pouring. On the other hand, if the amount of binder added is determined based on sand that maintains a certain degree of viscosity,
For non-viscous sand, there is an insufficient supply of binder, and molds made from such sand have low viscosity and are prone to deformation.

(Purpose of the invention) The present invention was made in view of the above-mentioned circumstances.In particular, in vertical frameless molds, mold parts, etc. are formed on both the front and rear surfaces of the mold, so Focusing on the fact that the sand on the surface is burnt and loses its viscosity, we aim to provide a mold disassembly device that can collect non-viscous sand and other sand separately when crushing the mold. be.

(Structure of the invention) Hereinafter, the present invention will be described in detail based on an example. The drawing shows the end of a mold conveyance path 1 in a casting line, and on the conveyance path 1 there is a vertical frameless mold (hereinafter referred to as A mold group 3 consisting of a plurality of connected molds 2 is placed with the leading mold 2 facing the leading edge of the conveyance path 1, and each connected portion of the mold 2 has a mold Item 4 is cast. The mold group 3 is intermittently moved in the direction of the arrow on the conveyance path 1 by 21 molds at a time, so that the leading mold 2 is pushed out from the conveyance path 1.

Above the end of the mold conveying path 1, there is a conveying path 1.
It consists of a guide rail 5 arranged parallel to the guide rail 5, a traveling carriage 6 movably suspended on the guide rail 5, and a hanging arm 7 attached to the traveling carriage 6 and protruding in the direction of the conveyance path 1. A casting product lifting device 8 is provided, and the tip of the lifting arm 7 is connected to the guide rail 5 so that the traveling truck 6
When moving along to the right limit position in the drawing,
Penetrating the leading mold 2 of the mold group 3 on the conveyance path 1 and inserting it into the runner neck part of the casting 4 cast in the connecting part between the mold 2 and the succeeding mold 2, and This is supposed to be clamped.

Below the end of the mold conveyance path 1, there is a conveyance path 1.
A vibrating chute 1 consisting of an inclined grate 9 with one side high and the opposite side low; a chute 11 fixed to the lower surface of the grate 9; and a base 13 supporting the grate 9 via a spring 12.
4, and the inclined grate 9 is configured to cause slight vibrations by a vibration motor 15 fixedly installed on the lower surface thereof.

The lower end opening of the chute 11 is connected to a belt conveyor 16 whose one end faces a waste sand processing site (not shown).
The other end is facing upward.

Inclined grate 9 in the vibrating chute 14
A grate 18 surrounded by a cover member 17 on three sides except for the discharge end (the left end when facing the figure), a hopper 19 fixed to the lower surface of the grate 18, and a spring 21 attached to the hopper 19 are provided below the lower side of the grate 18. A shakeout machine 23 consisting of a base 22 supported through the hopper 19 is provided, and the grate 18 is moved diagonally to the left in the direction of the drawing by a vibration motor 24 fixed to the side wall of the hopper 19. It is designed to cause vibrations.

A chute 25 is disposed below the hopper 19, and the lower end opening of the chute 25 faces above the other end of a belt conveyor 26, one end of which faces a sand reclamation plant (not shown). Note that 27 is a recovery device for castings, core metals, etc.

(Function) In the device configured as described above, when the traveling carriage 6 of the casting product lifting device 8 is run along the guide rail 5 to the right limit position in the drawing, the tip of the lifting arm 7 It passes through the leading mold 2 in the upper mold group 3 and is inserted into the runner neck of the cast product 4 cast in the connection between this mold 2 and the succeeding mold 2. The arm 7 then clamps the runner neck of the casting 4 in a suitable manner. After that, the mold group 3 moves toward the mold 1 in the direction of the arrow.
At the same time, the traveling carriage 6 also moves in the same direction, and as a result, the leading mold 2 is pushed out of the conveyance path 1 and onto the inclined grate 9 of the vibrating chute 14 while keeping the original mold almost stationary. The casting product 4 is then separated from the mold group 3 and transported to a casting cleaning facility (not shown).

The mold 2 that has fallen onto the inclined grate 9 of the vibrating chute 14 slides down the inclined surface while being subjected to slight vibrations, but at this time, the burnt sand that has lost its viscosity near the mold part of the mold 2 is sieved off. , the sand is conveyed to a waste sand processing site (not shown) via the grate 9, the chute 11, and the belt conveyor 16. The mold 2 then falls onto the grate 18 of the shakeout machine 23 where it is subjected to strong vibrations and is crushed into sand, which is then transferred to the grate 18, hopper 19, chute 25 and belt conveyor 26.
After that, it is transported to a sand reclamation plant (not shown).
It should be noted that objects that cannot pass through the grate 18, such as castings, core metal, etc. contained in the mold 2, are removed from the discharge end of the grate 18 outside the machine due to diagonal vibration of the grate 18 in the shake-out machine 23. It is sent out to the recovery device 27. When the first mold 2 is completely crushed in this way, the traveling cart 6 of the casting lifting device 8 moves again along the guide rail 5 to the rightmost position in the drawing,
The tip of the hanging arm 7 passes through the leading mold 2 on the conveyance path 1 and is inserted into the runner neck of the casting 4 cast in the connection between the mold 2 and the succeeding mold 2. .

Thereafter, the same operations as above are repeated, and the mold group 3 on the conveyance path 1 is successively separated into cast products 4.
crushed into sand.

(Effects of the invention) As is clear from the above explanation, the present invention provides a casting line for vertical frameless molds, in which a casting lifting device is disposed above the end of the mold conveyance path, and the conveyance path A vibration chute is provided below the end of the
A shakeout machine is provided further below the vibrating chute. Then, the casting is taken out from the mold sent to the end of the conveyance path by the lifting device, and the mold is pushed onto the vibration chute, where the surface of the mold is burnt and loses its viscosity due to slight vibrations. The mold is then sent to the shake-out machine and crushed into sand by strong vibration, and the sand is used as recycled sand. Therefore, according to the present invention, since the reclaimed sand does not contain sand that has lost its viscosity due to being burnt by the heat of the molten metal, the amount of binder added during the sand reclaiming process can be reduced and the viscosity can be reduced. There are no molding or pouring problems caused by excess or deficiency of binder.

[Brief explanation of the drawing]

The drawing is a front view of a disassembly device for a vertical frameless mold according to the present invention. 1: Mold conveyance path, 2: Vertical frameless mold, 4: Casting product, 8: Casting product lifting device, 9: Inclined grate, 14: Vibrating chute, 23: Shakeout machine.

Claims (1)

[Scope of utility model registration request] Conveyance path 1 for conveying poured vertical frameless mold 2
A casting product lifting device 8 is disposed above the end of the transport path 1, and the general transport path 1 side is set at a higher level below the end of the conveyance path 1.
A vibrating chute 14 consisting of an inclined grate 9 with the opposite side at a lower level is arranged so as to be able to vibrate slightly, and a shake-out machine 23 is disposed below the lower side of the inclined grate 9 in the vibrating chute 14 so as to be able to vibrate strongly. This is a vertical frameless mold disassembly device.