JPS6015044A - Removing method of core for casting - Google Patents

Abstract

PURPOSE:To remove easily a core for casting after molding and to improve molding efficiency of the core by providing ejecting seat plates to the bottom end face of a liner incorporated in a core box, upsetting the core box after molding of the core and ejecting the seat plates by compressed air. CONSTITUTION:Sand which is cured in a core box 1 is charged into a core box 1 contg. a liner 2 to mold a core 9. The box 1 is inserted into a core upsetting machine upon curing and after the box is fixed by fixing pawls 3, a core molding board 10 attached with a fitting plate 11 is installed and the upsetting machine is operated. Compressed air is blown through a compressed air blow part 6 provided in a cylinder 5 of the upsetting machine after the upsetting to exert compressive force to ejecting seat plates 8 through flow ports 4 for the compressed air. The liner 2 and core 9 are dislodged from the box 1 by the compressed force. The man-hour for taking out the core 9 is reduced by such method and the failure and deformation of the box are decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting out a casting core, and more particularly to a method for easily cutting out a core after the entire core is molded using a stone assembly using a nest.

The size and shape of the stone set, which is a model for making the core that forms the hollow part of the casting, is determined by the casting in question.

In order to obtain a predetermined core shape, Iwagumi often uses a split mold inside the Iwagumi or uses nests.

In order to mold and cut out the core using organic self-hardening foundry sand, inorganic self-hardening foundry sand, gas hardening type da sand, etc. for nested stonework, the stone work must be inverted and removed. , it is necessary to take out the nest.

The present invention has been made for the purpose of simplifying and speeding up the work steps of reversing the stonework, removing the stonework, and removing the nested nails.

That is, the present invention provides a method for molding a casting core using a masonry assembly using a nest, and then cutting it out of the mold, in which a nest extrusion seat plate operated by compressed air is provided on the lower end surface of the nest,
A compressed air supply mechanism to the seat plate is arranged, and after the core is formed, the entire stone set is turned over, and then compressed air is supplied to the seat plate by the compressed air supply mechanism to push out the seat plate. This invention relates to a method for cutting out a core for beta casting, which is characterized by pulling out the nest and the core from a stone assembly.

FIG. 1(A) (middle) is a diagram showing an embodiment of the method of the present invention, in which 1 indicates 5 boxes, 2 a nest, 6 a 5-box fixing claw of a reversing machine, and 4 compressed air vents. pores, 5 is the inverter cylinder,
6 is a compressed air inlet, 7 is a core tube surface plate, 8 is an extrusion seat plate, 9 is a core, 10 is a core surface plate, and 11 is a camshaft plate.

Note that FIG. 1(A) is a plan view, and FIG. 1(B) is a sectional view.

Sand that hardens in the core box, such as furan sand or gas-type sand, is put into a five-box 1 containing the nest 2, and a core 9 is formed.

After curing is completed, insert the 5 boxes 1 into a core reversing machine (not shown) and fix them with the 5 box fixing claws 3 of the reversing machine.
Install the core surface plate 1o marked with and operate the reversing machine.

FIG. 1(4), 03) shows the state after the reversal is completed.

After the reversal is completed, compressed air is blown into the compressed air inlet 6 provided in the cylinder 5 of the reversing machine. The compressed air applies compressive force to the push-out seat plate 8 through the compressed air vent 4tl. When this compressive force increases the frictional resistance of the nest 2 and the core 9, the nest 2 and the core 9 fall out of the box 1.

According to the method of the present invention described above, the following effects can be achieved.

(1) The number of man-hours needed to take out cores from five boxes is reduced.

(2) Core molding efficiency is improved.

(3) Damage and deformation of the 5 boxes are reduced.

[Brief explanation of the drawing]

1(A) and CB) are diagrams showing an embodiment of the method of the present invention, in which FIG. 1(A) is a plan view and FIG. 1(CB) is a sectional view. Sub-agents 1) Meifuku agent Ryo Hagiwara -

Claims (1)

[Claims] In a method in which a casting core is molded by a stone assembly using nests and then removed from the mold, a nest extrusion seat plate operated by compressed air is provided on the lower end surface of the nest, and a compressed air supply mechanism to the seat plate is disposed; After the molding of the core, the entire stone assembly is turned over, and then the compressed air supply mechanism supplies compressed air to the seat plate to push out the seat plate, thereby extracting the nest and the core from the stone assembly. How to cut out cores for casting.