SU735417A1 - Apparatus for cutting-out round blanks polymeric sheet material - Google Patents

Description

(54) DEVICE FOR from sheet

one

The invention relates to devices for processing polymeric materials and can be used for cutting circular billets of rubber production parts from unvulcanized rubber sheet.

A device for cutting circular blanks from a sheet of polymeric material is known, which comprises a mandrel mounted on a drive spindle with a cutting tool positioned at a given angle, mounted concentrically with a shpin- 0 dividing rod with a clamping disk spring-loaded relative to it in the axial direction and coaxial with the last supporting disc with a cutting edge one.

In the known device, the cutting tool is made in the form of rollers mounted on sub-holders and interacting with a side surface with the cutting edge of the supporting disc. Because of this, when cutting blanks of different diameters, it is necessary to change the bearing disc, which reduces the productivity of the device.

It is also known a device for extrusion of circular blanks from a sheet of polymeric material, containing established

with the possibility of axial movement relative to each other, the drive spindle and the housing, on which a clamping disk, a mandrel connected to a pinch and mounted on the latter at a predetermined angle of a wedge knife 2, is mounted on the sub-holders.

In this device, the housing is installed by means of a cap nut, and on the housing is mounted a yoke, provided with spring-loaded bolt carrying a copy sleeve, cooperating with a bevel made on the spindle, and a pusher in contact with the end of the knife mandrel.

The known device has a complex structure and does not provide the proper quality of the workpieces, since the knife is removed from the supporting disc.

The aim of the invention is to simplify the design of the device and improve the quality of the workpiece.

To achieve this goal, a device for cutting circular billets from a sheet of polymeric material that contains axially displaced relative to each other CUTTING PANTS OF POLYMERIC MATERIAL ha and the housing, on which is mounted on bearings a pressure plate connected to the spindle and located on the spindle the last at a given angle of the wedge knife, the body is installed on the bottom end of the spindle by means of an overload, spring-loaded relative to the spindle in the axial to and is provided with a guide for the mandrel, and the latter is connected to the spindle by means of a plate spring. The drawing shows the described device. A device for cutting circular blanks from a sheet of polymeric material contains a drive spindle 1 installed with the possibility of reciprocating, in the vertical plane, on the lower end of which, by means of a stop 2, a body 3 is installed with the possibility of axial movement relative to the spindle. The housing 3 is spring-loaded with respect to the spindle I in the axial direction by the spring 4. On the housing 3 by means of bearings 5 an mounted-pressure disk 6. The housing 3 is provided with a guide 7 for the mandrel 8 on which the wedge knife 9 is located. The mandrel 8 is connected to the spindle 1 by means of a plate springs 10. During operation, the device is located under the supporting table P. The device operates as follows. Sheet polymeric material 12 is placed on the table 11. Spindle 1 is turned and is pressed before the pressing disk 6 touches the material scrap 12. The disk 6 presses the material 12 to the table 11, fixing it from displacement during the cutting process. With further lowering, the spindle 1 compresses the spring and through the plate

Claims (2)

735417 Spring 10 acts on the mandrel 8, which with a wedge knife 9 moves along the direction of the 7 to the edge of the pressure plate 6. The knife 9 cuts into the material 12 to complete cutting of the latter. After cutting the circular workpiece, the spindle rises and all the device parts return to their original position. The material 12 is moved relative to the table 11 by a predetermined distance and the cycle repeats. The described device is reliable in operation and provides high quality of the cut blanks. Apparatus of the Invention A device for cutting circular billets from a sheet of polymeric material, comprising a drive spindle installed with the possibility of axial movement relative to each other and a housing on which is mounted on bearings a pressure disc connected to the spindle mandrel and located on the latter at a predetermined wedge blade, characterized by the fact that, in order to simplify the design of the device and improve the quality of the workpieces, the casing is mounted on the bottom end of the spindle by means of an abutment spring loaded from ositelno shpiydel in the axial direction and is provided with a guide for the mandrel, and the latter is associated with the spindle by means of a leaf spring. Sources of information taken into account during the examination 1. USSR author's certificate No. 585923, cl. B 23 D 19/08; B 26 D 1/20, В29С 17/10, 01.04.76. 2. USSR author's certificate number 479644, cl. B 29 C 17/14; In 29 N 3/06, 04/06/73 (prototype).