SU747618A1 - Machine for squeezing-out casting with parallel approach of semimoulds - Google Patents

Description

one

The invention relates to the field of foundry engineering, in particular to the casting of thin-walled large-sized castings of the body type by the squeezing method.

A known machine for squeezing casting with parallel approaching half-molds, consisting of a bed with flat guides, along which two plates with fastened rigging, driven by working hydraulic cylinders, and a plate of metal receiver, move. On one of the movable plates are swiveling side cheeks; the latter, in the working position, compact the tooling, creating a closed cavity into which the molten metal is poured. In this machine, the plate of the metal receiver is rigidly fixed on the frame of the machine i.

The disadvantage of this design is that throughout the entire course of the installation mixing of the half-form from the initial position to the working position and vice versa, as well as opening the mold after pouring the molten metal and squeezing the half-shape, they will mix along the working plane of the metal receiver plate. This leads to the scoring of the mating surfaces of the plate of the metal receiver and the half-form due to hardening of the metal between them when squeezing. Seizures can be so significant that they lead to metal leaks when it is poured into a metal receiver and the metal receiver plate and tooling are disabled. Seizure leads to deformation of the guide, which affects the quality and accuracy of the castings. Bullies occur mainly during the disclosure of the form.

The aim of the invention is to increase 10 the durability of the tooling and the metal receiver.

The goal is achieved by the fact that the machine is equipped with support assemblies, each of which is made in the form of a screw connected with nut-pockets mounted on bearings in a housing fixed to the frame and connected to a rack, the ends of which are connected to pistons of cylinders attached to case, while the metal receiver plate is installed on the support nodes.

FIG. 1 shows the proposed machine, side view in the area of the plate of the metal reservoir; in fig. 2 is the same, section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2

The machine contains a bed 1, along the guides of which the molds 2 and 3 alternate; the latter with a plate of metal receiver 4 and side cheeks 5 form a cavity for pouring molten metal. The plate of the metal reservoir 4 is mounted on support assemblies containing screws 6, which are mounted in 10 6 bolt-on nuts and are supported on bearings 8 and 9 located in the housing 10. The housing 10 is fixed on the frame 1. The nut-gear 7 is connected to the rack rail 11, which is connected by ends with pistons of cylinders 12 mounted on housing 10. Nuts 13 and 14 are mounted on screws 6.

When moving the half-molds 2 and 3 into the pouring position, pressure is supplied to the cavity B of the cylinders 12. The gear nuts 7 are turned counter-clockwise with the rails 11, the screws 6 with the plate are in the lower position. The side cheeks 5 are pressed against the half-molds 2 and 3. The pressure is supplied to the cavity G, the gear nuts 7 are rotated 11 clockwise, the plate with screws 6 rises until the nut 13 is pressed into the housing 10. In this case, between the half-molds 2 and 3 and the plate of the metal receiver 4 maintains the gap a, the value of which is established using nuts 13 and 14. After pouring the metal, squeezing and crystallizing the casting, pressure is applied to the cavity B of the cylinders 12. The gear nuts 7 are turned counterclockwise with rods 11, screws 6 with the metal receiver plate 4 P The metal receiver is lowered to the lower position. The cheeks 5 are retracted from the half-molds 2 and 3, the half-forms 2 and 3 are moved to the initial position, and the casting is simultaneously ejected from the half-molds. The casting is then removed from the machine. After servicing the tooling, cleaning it and the metal receiver plate from adhering metal and coating the coating on them, the cycle is repeated.

The invention avoids scuffing on the working surface of the metal receiver and the surfaces of the half-molds associated with it, which leads to an increase in tool life and a metal receiver, an increase in machine utilization, and an increase in the quality of castings.

Claims (1)

Invention Formula A machine for squeezing with parallel approaching half-molds, containing a frame installed on the frame with the possibility of longitudinal movement of the half-form, side cheeks and metal receiving plate, characterized in that, with the aim of increasing the durability of the half-forms and metal-receiving, it is equipped with supporting units, each of which made in the form of a screw interacting with a gear nut mounted on bearings in a housing mounted on a frame and connected to a rack, the ends of which are connected to the pistons of cylinders, replenished on the body, while the metal receiver plate is installed on the support nodes, the screws of which are connected to the metal hearth plate. Sources of information taken into account in the examination 1. Maschina for casting body parts by the method of parallel approximation of half-molds. Drawing No. 70053.006.00000, NIAT, M 5 1966. five / L five