DE8634338U1 - Mitre angle cutting device for insulating hoses made of plastic foam and rubber - Google Patents

Description

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Description Mitre angle' cutting device for insulating hoses made of plastic foam

and rubber.

The invention is a device for precisely cutting miter angles on hoses that are made of foamed plastic and have different outer diameters and different wall thicknesses.

The object of the invention is that hoses made of foamed plastic can be used to insulate pipes. The pipes to be insulated are not only arranged in straight verticals and horizontals, but also in bends. These bends have different angles. The hoses mentioned are not always flexible enough to follow the pipe bends, which is why it is necessary to cut so-called miter angles of 15, 22.5, 30 and 45 degrees; when the foamed plastic hoses are cut at the corresponding angles, cut surfaces are created that are glued together, which requires that the two cut surfaces that are to be glued together have been cut precisely. So-called miter boxes are used for this, which are commercially available in various designs. Pies·; Devices have the disadvantage that although they show angle measurements, they do not have any parts with which the hose to be cut can be fixed in place in such a way that neither the cutting tool nor the hose change their position on the miter box. If the position of the hose changes, the miter angle changes and the cutting tool is not guided precisely, the cutting surfaces no longer correspond to one another and a different angle to that intended is created, both in relation to the hose's longitudinal axis and in relation to the transverse axis. Installation on the pipe bend is made very difficult, which costs time (wages) and ultimately leads to inadequate insulation because gaps create cold bridges and ice crystals in the cooling area destroy the insulating hose.

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The task was solved by using a plate (A) in

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A round or square shaft (c) is mounted in area (g), onto which two disks (B) with slots (h) are placed, with the shaft (C) being guided through the shoe (i). The shaft (C) is fixed to the plate (A) by a lock screw (D) with nut (n). The disks (B) can be pushed back and forth on the shaft (C); the distance between the two disks (B) corresponds to the outside diameter of the insulating tube to be cut. The disks (B) are immovably fixed to the shaft (C) by means of an adjusting screw (k). To cut the insulating tube, a knife blade or the like is guided through the slots (h) of the two disks (B), specifically through the slot that corresponds to the angle of the pipe. Because the tube is clamped between the disks (B) and the knife blade is guided through two slots (h), each cut is exact to the previous one and the cutting surfaces correspond exactly to one another.
The attached drawings show:
Figure 1;

Plate (A) with recesses (e) to fix the plate to the work table using clamps, with recesses (f) for the discs (B) and to reach the adjusting screws (k) on the discs (B). The windows (g) serve to accommodate the shaft (C).
Figure 2;

Cross section through the plate (A).
Figure 3;

Plate (A) seen from the front.
Figure 4;

Disc (B) with slots (h) where the slots (h) correspond to angle dimensions, with shoe (i), adjusting screw (k).
Figure 5;

Disc (B) seen from the side.
Figure 6

Disc seen from above.
Figure 7:

Square shaft (C), hollow inside (m).
Figure 8:

Wave (C) in section x/y.
Figure 9:
Carriage bolt (D) with thread (o) and nut (n).

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Figure 10;

Mounting the disc (B) onto the plate (A).

Figure 11;

Mounting of the pane (B) using the shaft (C) which passes through the window

(g) of the plate (A). The discs (B) are sunk with their lower edge into the recesses (f) on the plate (A). The lock screw is inserted through the hollow (ra) shaft (C).

(D) and screwed (n). The shoe (i) is fixed to the shaft with an adjusting screw (k).

Summary;

Slots are made at different angles on a disc; two of these discs are movably mounted on a shaft so that objects can be clamped between the discs using adjusting screws.

The protected discs are mounted on a plate by means of a shaft.

This device makes it possible to fix insulating tubes with different external diameters and different wall thicknesses on the plate, so that a cutting blade that is guided through the slots of a disc always produces exact angles and the cut surfaces that are produced always match one another.

Claims (3)

Expectations 1. Miter angle cutting device for insulating hoses made of foam plastics and rubber, characterized in that disks (B) have slots (h) arranged at angles and can be movably mounted on a hollow intermediate piece (C) by means of a shoe (i) attached at the bottom and can be locked at any point on the intermediate piece (C) by means of adjusting screws (k). 2. Miter angle cutting device according to claim 1, characterized in that the disk (B) with intermediate piece (C) is fastened to the plate (A) by means of a lock screw (D) which is passed from one long side of the plate (A) through a window (g) and the hollow table piece (C) and is screwed to the other long side. 3. Miter angle cutting device according to claim 1 and 2, characterized in that the plate (A) has recesses (e) for clamping the plate (A) to a work table, as well as windows (g) for passing through an intermediate piece (C) and a lock screw (D) and recesses (f) for the movable mounting of the disk (B) on the intermediate piece (C).