SU618187A1 - Pressure-casting machine with vertical cold pressing chamber - Google Patents

Description

The invention relates to foundry and can be used for the production of pressure castings.

Known machine for injection molding. with a vertical cold pressing chamber containing a locking mechanism, a pressing mechanism, a pressing chamber, and a hydraulic system l. The pressing chamber is located on the pressing piston co-axially with it and at a distance from the lower end of the press-form), which provides free access when pouring metal into it. Moreover, it can make reciprocating movements with the piston, and the piston - inside it.

The disadvantage of the machine is the complexity of the design, namely, that the locking mechanism is a carrier for the pressing mechanism, and the coupling of the pressing chamber directly to the mold does not ensure their reliable articulation due to the absence of a rigid connection between them and the frame of the machine. When pressing metal at the moment of water hammer, the pressing chamber can tilt, open and eject metal.

Closest to the invention is an injection molding machine with a vertical cold pressing chamber, comprising an upper fixed plate with a locking mechanism, a lower fixed plate in which the pressure cup of the compression chamber is installed, a pressing mechanism including a hydraulic cylinder, a rod, a piston and a dosing cup, mounted on the piston of the pressing mechanism coaxially to the power glass 21

The disadvantage of this machine lies in the complexity of the design, since the movement of the dosing cup is carried out from a separate drive in the form of a hydrocyliidre. In addition, the cantilever arrangement of the metering cup relative to the drive and the absence of a rigid connection between the rod of the pressing hydrocylinder and the piston rod, on which the metering cup is located, cannot ensure reliable operation of the machine.

The goal of the HACTO® invention is to simplify the design and increase its reliability.

This goal is achieved by the fact that in the proposed injection molding machine the dosing cup is spring-loaded relative to the hydraulic cylinder of the pressing mechanism.

The spring-loaded installation of the dosing cup relative to the hydraulic cylinder of the pressing mechanism allows the dosing glass to be moved directly by the pressing mechanism, which eliminates the hydraulic cylinder of the drive of the dosing glass and simplifies the design. In addition, the location of the metering cup is spring-loaded and coaxially to the hydro-cylinder of the pressing mechanism, eliminating the possibility of the metering cup skewing when it joins with the power one, ensures close contact at the interface and improves the reliability of the machine.

The drawing shows schematically the proposed machine.

The casting machine under the grip with a vertical cold pressing chamber consists of a frame that is a rigid structure including fixed plates 1-3 and columns 4. On the fixed plate 2 there is a lock cylinder 5 that serves to move the movable plate 6 when closing and opening half molds 7 and 8.

The fixed plate 3 is fixed to the power glass 9 of the pressing chamber. The press cylinder 10 of the stand 11 is rigidly connected to the fixed plate 3. On the piston 12, rigidly fastened to the rod 13 of the press cylinder Yu, the measuring cup 14 is fixed coaxially with it, which is held on the piston 12 by the spring 15 through the nut 16.

Dosing cup 14 has the ability to move reciprocating in the sleeve 17, fixed in the guide 18, coaxially with the power cup

9to tight docking with him on a conical surface. The piston 12 has the ability to move reciprocally with the dosing cup 14 until the latter is docked with the power cup 9, and then continue moving relative to the cups 9 and 14. Upper LINE the end of the dosing cup 14 is set at a distance from the bottom

Ca of the power gtakan 9, which provides free access when pouring a dose of metal.

The machine works as follows.

When the hydraulic cylinder 5 is turned on, the plate 6 is locked for closing, and it is mixed in columns 4 and the mold halves 7 and 8 are closed. The melt is poured into the dosing cup 14. The 1O pressing cylinder is pressed into the pressing and the dosing cup 14, together with the piston 12, by means of the rod 13 and the spring 15 is moved in the sleeve 17 until it joins along the conical surface with the power glass 9.

In this case, the spring 15, compressed, provides a tight fit of the dosing and power cups. The piston 12, continuing to move further, moves the liquid Metal from the metering cup 14 to the power cup 9 and injects the metal into the mold. After the metal is crystallized under pressure in the mold, the hydraulic cylinder 5 is pushed onto the opening, the plate 6 is retracted together with the half-form 7 and the piston 12, under pressure, pushes the pressure rod together with the castings from the lower half-form 8. From the upper half-form 7, the castings are pushed out as usual , pushers (not shown). When the pressing cylinder 10 is turned on to pull out the mold 12 to the initial position, the latter, moving back, returns the dosing cup 14 to the initial position and the cycle of operation of the machine is repeated.

Due to the fact that the dosing cup is spring-loaded relative to the cylinder of the pressing mechanism, it becomes possible to eliminate the cylinder of the drive of the dosing cup, which allows to reduce the number of drives, simplify the design, reduce the cost of the machine and increase reliability in operation.

Claims (1)

Invention Formula Machines; for casting under pressure with a vertical cold pressing chamber, comprising an upper fixed plate with a locking mechanism, a lower fixed plate in which the pressure cup of the compression chamber is installed, a pressing mechanism including a hydraulic cylinder, a rod, a piston and a metering cup mounted on the piston of the pressing mechanism the glass, characterized in that, in order to simplify the design and increase its reliability, the dosing glass