DD226249A1 - ADJUSTABLE CHIP TABLE - Google Patents

Abstract

The invention relates to an adjustable clamping table, in particular for clamping screen mesh for screen printing frame. The aim and task is to create a clamping table that spans screen meshes of different dimensions, that reliably holds the clamping frame of various sizes and thereby guarantees a wrinkle-free and even tensioning of the screen mesh. In a clamping table, the clamping or clamping bars and clamping means, preferably pressure cylinder, for tensioning the screen fabric, this object is achieved by the invention that four terminal strips, which are arranged in pairs opposite each other in two superimposed planes, each one pair in a plane to the other pair in a second plane is rotated by 90 to each other and the terminal strips are each pair slidably mounted to each other in Fuehrungsleisten and further each terminal block has a support surface in a common four surfaces all levels. Fig. 1

Description

ιitel the invention Adjustable clamping table area of application of the 'invention

The invention relates to an adjustable clamping table, in particular for clamping screen mesh for screen printing frames,

Characteristic of the known technical solutions

Are known simple clamping devices in which the mesh fabric is first clamped by means of several clamping screws and then clamped over spindles in one direction. A wrinkle-free and even stretching of the mesh "on four sides is not possible.

In other known devices, the mesh is placed over a geometrically fixed clamping frame and hooked to 90 twisted against the screen mesh nail strips, Subsequently, in this solution, a geometrically smaller frame is pneumatically driven by the former, wherein the fabric is stretched. The disadvantage of this device is the rigidly prescribed geometrical dimensions of the two clamping frames used,

Another solution has a larger number of freely movable printing cylinders, wherein the screen mesh to be clamped is mechanically fastened between terminal strips and is tensioned by the retracting and thereby in each case to be covered frame supporting pressure cylinder. The disadvantage here is the large number of reassigning and re-pressurizing impression cylinder, if frames of different sizes are used.

According to DE-PS 1 153 971 a "pneumatic tensioning device for fabric and wire-mesh trays" is proposed in which filling or inflatable elastic hollow body are arranged with lying in the Siebspannrichtung draw axis between a clamping bar and attached to the screen frame support bar. In addition to numerous advantages of this solution is generally the disadvantage that a variability in terms of use for different clamping frame sizes is not given.

Object of the invention

The aim of the invention is a clamping table, which is suitable for covering tenter frames of different sizes with screen fabric and thereby allows a quick and easy work with economical screen fabric consumption,

Explanation / essence of the invention

The invention has for its object to provide an adjustable clamping table that spans screen meshes of different dimensions, the clamping frame of different sizes safely absorbs and thereby guarantees a wrinkle-free and uniform clamping of the mesh fabric.

In a clamping table, the clamping or clamping strips and clamping means, preferably pressure cylinder, for clamping the screen fabric, this object is achieved in that four terminal strips, which are arranged in pairs opposite one another in two superimposed planes, wherein each pair in a plane to the other pair is twisted in a second plane 90 ° to each other and the terminal strips are each pair slidably mounted in guide rails slidably and further each terminal block has a bearing surface in a common plane to all four bearing surfaces,

During the clamping process, the terminal strips are first moved to the size of the frame to be covered and locked in this position. Then the clamping frame is placed on the contact surfaces located on the terminal strips and placed the prepared mesh over the clamping frame and inserted between the jaws of the terminal strip ♦ After clamping the terminal strips are pulled out via pressure cylinder out and strained the mesh. After attaching the screen mesh to the clamping frame, a new clamping operation can be initiated.

Embodiment 25

The invention is based on an embodiment. be explained in more detail «

In the accompanying drawing: Fig. 1: an inventive adjustable clamping table in plan view and

2: section A-A of FIG. 1.

A erfindungsgeraäßer clamping table consists of a frame 1, on which a table top 2 rests «on this are different height spacer strips 3, 4 and strips 5 firmly mounted.

On the spacer strips 3, 4, two guide strips 6 are arranged between which a slider 7 runs, which in turn carries terminal strips 8, 9. At the four terminal strips 8, 9 are centrally located bearing surfaces 10, which are formed as a bracket for a clamping frame 11 indicated by dashed lines. On the guideways formed by the guide rails 5 more sliders run 12, on each of which a printing cylinder 13 is attached to a bracket 14. The printing cylinders have additional detents 15, which, in conjunction with a grid division in the guide rails 5, enable a gradual change in format together with the clamping strips 8, 9. Further pressure cylinders 16 ensure trouble-free closing of the terminal strips 8, 9.

To cover a tensioning frame 11, the detents 15 are first released, the clamping strips 8, 9 moved between the guide rails 6 by means of the sliders 7 on the format size of the clamping frame and locked again. Thereafter, a clamping frame 11 is placed on the support surfaces 10 and placed according to the format to-. Cut screen fabric over the clamping frame 11, The screen mesh can now be inserted between the jaws of the four clamping bars 8, 9 and clamped by triggering the other pressure cylinder 16. Subsequently, the defined tensioning of the screen fabric by the pressure cylinder 13, which pull the terminal strips 8, 9 to the outside. After attaching the screen fabric on the clamping frame 11, the terminal strips 8, 9 are opened and placed on the impression cylinder 13 in its original position.

Claims (1)

- 5 claim Adjustable clamping table, in particular for clamping screen mesh for screen printing frame, the clamping strips and clamping means, preferably pressure cylinder, characterized in that four terminal strips (8, 9), which are opposite to each other in pairs, are arranged in two superimposed planes, wherein each pair in a plane to the other pair in a second plane is rotated by 90 to each other and the terminal strips (8, 9) are mutually displaceably mounted in each guide pairs (6) and further each terminal strip (8, 9) a support surface (10) in one all has four bearing surfaces (10) common plane, For this 2 sheets of drawings