SU1491604A1 - Apparatus for making elongated rods - Google Patents

Abstract

The invention relates to foundry, in particular, to the manufacture of long rods. The purpose of the invention is to increase the uniformity of compaction of the core mixture. The device comprises a hopper for the core mixture, a housing with a screw element located therein associated with a rotating drive. The device is equipped with an additional screw 10, telescopically mounted on the shaft 8 of the screw 7, and an end bolt 6 placed inside the housing 3, which are driven by their joint axial movement. 1 il.

Description

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The invention relates to the field of foundry and can be used in the manufacture of long, large rods of variable cross section.

The aim of the invention is to increase the uniformity of compaction of the core mixture.

The drawing shows the device, transverse section.

The device contains a hopper 1 for a mixture with a gate 2, mounted on the housing 3 of a detachable core box, with a cap nut 4 installed at its one end, made with a hole 5, and the other with a hollow end gate 6.

Inside the housing 3 there is an auger element. 7, the shaft 8 of which is located at one end in the hole 5 of the cap nut 4, its other end is telescopically connected by moving the rolling pin 9 with the screw 10, which is located together with the shaft 8 of the screw 7 in the end hole shutter 6.

At the end of the screw 10 there is fixed a gear wheel 11, which connects the telescopically connected screws 7 and 10 with a rotational drive (not shown), and a drive lever 12, which connects the screw 10 together with an end valve 6 with an axial displacement drive (not shown).

The slots of the joint 9 on the shaft 8 of the screw 7 are made at a length of 0.1-0.15 of the total length of the formable rod, and the zone of action of the screw 7 does not exceed 0.35-0.5 of the total length of the formable rod.

The elements (blades) of the screws 7 and 10 form discrete conical surfaces, while at the screw 7 they have a top along the axis of the fixing tip 13 and a base equal to 2/3 of the inner diameter of the housing 3, and at the screw 10 it is in the form of a truncated cone with a smaller base, equal to 2/3 of the inner diameter of the housing 3, and a large base at the end of the bolt 6, equal to 0.93-0.95 internal diameter of the housing 3.

A device for forming long rods operates as follows.

I Auger 7 is assembled by a spline 9 with auger 10 and the ends of the assembled element size

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The nuts 4 and the cavity of the end bolt 6 are located in the hole 5. After assembling the working element and placing it in the cavity of the housing 3, the rotational drive of the rotational element with the gear gear 11 and the axial movement mechanism with the driving lever 12 are mounted and opened. from the hopper 1 to the screw 10, and then the working element of the device is brought into rotation. The working mixture continuously moved by screw 10 and 7 is compressed first by the cap nut 4 and then throughout the entire auger 7 zone. When the maximum degree of compaction of the mixture in the specified zone is reached, the relay drives the rotational drive and simultaneously activates the axial drive movement by means of a lever 12, which moves the screw 10 along the slit joint 9 in the direction of the cap nut 4. Simultaneously with the screw 10, the axial movement 6 is also carried out by the end bolt 6, which partially overlaps In its motion, the gate window 2.

In the process of axial movement, the screw 10 compresses the working mixture pressed in the zone of action of the screw 7 and simultaneously comes out of the engagement 9, allowing for autonomous rotation.

When the mixture is maximally compacted in the zone of action of the auger 7, the electrical relay turns off the axial displacement drive and turns on the rotational drive, as a result of which the working mixture continues to flow from the hopper 1 into the cavity of the housing 2y and condenses in the zone of the auger 10. When the maximum density is reached, the relay turns off the rotational drive and turns on the axial motion drive. Sequential switching on of the drives is carried out automatically until the junction end gate 6 completely covers the gate 2 and the relay does not turn off both drives at the same time, which indicates that the maximum mixture density has been reached in the zone of action of the screw 10 and the rod is being molded. I

Thereafter, the rotational drives and

axial movement is derived from engagement with gear 11 and lever

Upon removal of the rod, the cap nut 4 is removed and the body 3 (the core box) is unmounted, after which the rod is transported to the control section with the help of sling fixed on the tip 13 and the end part of the screw 10.

Constructive implementation of the working element in the form of augers of sequential action, ensuring the combination of two principles of compaction allows to significantly increase the uniformity of the mixture density when producing long rods both in length and in cross section of the latter, as well as reduce the scrap of the specified kind of castings. At the same time, the core formed in the proposed device has enhanced strength and transportable

automation of the manufacturing process

rods and cost reduction

pour.

Claims (1)

Invention Formula A device for the manufacture of long rods containing a core mix hopper, a housing with an auger connected by a shaft driven by its rotation is distinguished in that it is equipped with an additional auger to increase the uniformity of compaction of the core mixture. , telescopically mounted on the shaft of the main screw, and a mechanical shutter located inside the housing, and a drive for joint axial movement of the additional screw and the mechanical shutter.