DE3919112A1 - MOLDING MACHINE, ESPECIALLY CORE MOLDING MACHINE - Google Patents

Abstract

The operating i.e. the sand blowing unit (1) of a moulding machine is connected non-positively to the moulding i.e. the core box or mould box unit (3) during the operating cycle and guided freely in a form-fitting manner by the machine frame. The non-positive connection is made by means of parts corresponding to one another, preferably from clamping devices (2) and journals (4). The clamping devices are movable horizontally and vertically by drive means. <IMAGE>

Description

Field of application of the invention

The invention relates to a machine for producing Foundry molds and cores, in particular a core shooter. The invention is applicable in the foundry industry.

Characteristic of the known technical solutions

For pressure surge compression of molded materials in mold and core boxes is a stable and airtight connection between work unit, e.g. B. blowing and shooting unit and molding unit, e.g. B. Kern box or molded box required.

DE-PS 29 08 210 proposes the core box to be lifted by means of a lifting device and to the shooting head To press the shooting unit. From DE-OS 24 44 377 it is known a container filled with molding sand until it is firmly in place to lower onto the molding box. It is also e.g. B. from DE-OS 29 30 874 known, the mold or core box between a press frame and clamp the model plate.

The solutions mentioned are a releasable Ver binding of work and form unit, which is exclusively through a positive system is realized. The disadvantage is here that the occurring high contact forces from the machine frame must be included, which is very mechanical  is stressed and exposed to high wear. These molding machines therefore have to be very material-intensive leads. It is also for building and maintaining high pressure forces an additional energy requirement is required.

Aim of the invention

It is the aim of the invention, the wear on the molding machine to reduce, minimize the machine mass and the energy reduce consumption.

State the nature of the invention

The invention has for its object to a molding machine create in which the work unit and the molding unit without Inclusion of the machine frame a stable, airtight and easily detachable connection forms, the contact pressure only in the two elements work unit and molding unit and finally the machine frame to start work elements serves. According to the invention, the object is achieved by that the work unit with the form during the work cycle non-positively connected and loose from the machine frame is conclusively managed. The positive connection between The work and form unit is made up of corresponding ones Parts formed, preferably from clamps and Cone exists. According to a further feature of the invention the clamps, in particular by horizontal drives and designed to be vertically movable.

This means that when you combine the form and work unit Form unit pressed against the work unit with great force be without using the force on the machine frame works.

Embodiment

The invention is based on an exemplary embodiment explained in more detail. In the drawing shows

Fig. 1 is a schematic representation of the Ar beits- and the molding unit of a core shooting machine in the closed position and

Fig. 2 is a schematic representation of the Ar beits- and molding unit of a core shooter in the open position.

On a core shooter (not explained in more detail), a work unit 1 designed as a shooting unit is arranged on the upper part, which laterally has Verklammerungsein directions on its lower region which can be moved vertically and horizontally and can be moved by drives, not shown. Below the work unit 1 , a core box is arranged as a molding unit 3 , which has pins 4 on the side facing the work unit 1 . The pin 4 are designed in size and shape so that they correspond with the clip devices 2 of the work unit 1 , the pin 4 and the clip devices 2 engaging in one another and in the closed position ( FIG. 1) of the clip device 2 forming a positive-locking system .

After inserting the molding unit 3 on guide rails, not shown, under the working unit 1 of the core shooter until the interlocking devices 2 and pins 4 engage, the clamping devices 2 are moved upwards by actuating the drives, also not shown, until the clamping devices 2 of the working unit 1 with the pins 4 of the molding unit 3 form a self-contained system. The mold unit 3 is thereby pressed with its boundary surface facing the working unit 1 firmly and airtight to the Arbeitsein unit 1 , without the contact force acting on the machine frame. The firing process can then be triggered and the molding unit 3 is thereby filled with core sand. After the firing process, the clamp devices 2 are moved downward until the connection between the clamp devices 2 is removed from the molding unit 3 of the core shooter. It is advantageous in the inventive solution

• - the possibility of constructing the machine frame under strict standards of lightweight construction,  
• - the elimination of a support surface for the molding unit,
• - the use of the free space under the molding unit for the arrangement of any necessary recess parts
• - reduction of energy consumption,
• - Reduction of wear on the functional essentials components.

List of the reference symbols used

1 work unit
2 clamp device
3 molding unit
4 pins

Claims (3)

1. Molding machine, in particular core molding machine for the production of foundry molds and cores with a molding unit arranged under the working unit, characterized in that the working unit ( 1 ) is positively connected during the working cycle with the molding unit ( 3 ) and is positively guided loosely from the machine frame. 2. Molding machine according to claim 1, characterized in that the non-positive connection between the working unit ( 1 ) and the molding unit ( 3 ) consists of mutually corresponding parts, preferably clamping devices ( 2 ) and pins ( 4 ). 3. Molding machine according to claim 2, characterized in that the clamping devices ( 2 ) are designed to be movable horizontally and vertically, in particular by drives.