SU914290A1 - Apparatus for lengthwise cutting of polymeric material - Google Patents

Description

The invention relates to cutting devices and can be used in engineering and other industries, where it is necessary to divide the material into strips along ₅ fibers and where cutting of fibers, such as prepreg, is unacceptable.

A device for cutting film into longitudinal strips is known, including: ₁₀ ; clamping and cutting rolls mounted in the housing, rigidly interconnected by two removable strips, and take-up roll. All rolls are installed in the same vertical ₁₅ plane. The presser and cutting rolls rise above the pickup when the diameter of the cut film to be wound is increased. With circular knives, the film is cut into strips on a pressure roll ₂₀ [1].

However, the device cannot ensure the preservation of continuous fibers along the slice.

2

Closest to the present invention is a device for longitudinal cutting of a polymeric material, including a roll mounted on the base with knives with cutting edges fixed on it [2].

A disadvantage of this device is that the knife can cut longitudinal threads, breaking their continuity.

The purpose of the invention is the provision of high-quality separation of the fibrous material without cutting the fibers.

This goal is achieved by the fact that in a device for longitudinal cutting of a polymeric material, including a roller mounted on the base with knives fixed to it with cutting edges, each knife is made with a dividing radius edge, while the cutting edge is protruding relatively radius.

FIG. 1 schematically depicted

the proposed device, a general view;

3

914290

four

in fig. 2 is a section along A-A in FIG. one ; in fig. 3 "knife; in Fig. 4 is a section BB in Fig. 3.

The device includes a shaft mounted on a base (not shown) 5 locks 1 with knives 2 fixed on it and spacers 3 between them with a width equal to the width of the divided strips. In front of the roll 1, a reel 4 is installed with the material to be processed wound on it. After the roll 1 on the base mounted leading the filling roller 5 and take-up rolls 6.

The knife 2 is made with a cutting edge 7 and a dividing rudius edge 8,, 5 with the cutting edge protruding relatively radially and has a wedge shape with an angle of 15 -20 *.

The device works as follows. 20

The end of the strip is fixed in the charging roller 5, give the direction of the tape and after winding three to five layers enter the knives in the working position. Sharp ends cut prepreg. ²⁵

The cutting of the fibers occurs only at the moment when the sharp part of the knife is inserted into the material. Radius edge 8 is made further separation of

tapes, into strips of desired width along the fibers.

The invention will ensure a stable width of prepreg ribbons, which ultimately will lead to a better winding of the products and a decrease in the coefficient of variation in the strength of carbon fiber.

Claims (1)

Claim ί A device for longitudinal cutting of a polymeric material, including a roll mounted on the base with knives attached to it with cutting edges, characterized in that, in order to ensure quality separation of the fibrous material without cutting the fibers, each knife is made with a dividing radius edge, while cutting the edge is protruding relatively radial.