CS199062B1 - Cutting tool for preparation of samples for chemical analysis of leather - Google Patents

Description

(> i) Punching tool for preparation of samples for chemical analysis of leather

The invention relates to a die-cutting tool for preparing samples for the chemical analysis of leathers.

Leather for chemical analysis is being modified! by expanding their surface into small pieces, thereby achieving homogenization of the test material. So far, samples for chemical analysis of leather are being prepared! by hand cutting with a knife, cutting with scissors or milling in knife mills. In the manual preparation process using knives and scissors, the work is laborious and lengthy. The blade mills are complex and therefore expensive, I require! also complicated cleaning after grinding the required amount of each leather examined, thus significantly reducing labor productivity.

These drawbacks are eliminated by the punching tool according to the invention, characterized in that the linear knives are interconnected by their bodies and fixed in the knife frame, and in the gaps between the blades of the linear knives ejecting fibers are fastened with their ends in the ejector frame.

The technical effect of the punching tool lies in its simplicity of construction and in achieving the desired sample size.

An exemplary embodiment of a punching tool according to the invention is shown in the accompanying drawings, wherein FIG. 1 shows a front view of a folded punching tool; FIG. 2

199 062

I

199 062 shows a cross-section of a punching tool, FIG. 3 shows a punching tool with a magazine in a perspective view.

The punching tool consists of a set of linear knives 2, supported by a long side-by-side tent, between which spacers J are supported, supported on the bodies 21 of the linear knives 2. The thus arranged set of linear knives 2 and spacers 2 is connected to each other A gap 4 is formed between the blades 22 of the linear knives 6 and the spacers 4, in which the ejector threads 2 fixed on the ejection frame 6 fit, due to the shape of the linear knives 2 and the spacer inserts. The knives 2 are most preferably square or rectangular with a 1: 2 side ratio.

When punching the breast samples, the chemical analysis of the leather is carried out as follows. The leather to be examined is placed on a support under the punching tool. By pressing the pressing arm, thin leather strips are cut from the leather in the first stage. The cutting die aa is rotated by 90 °, and after carefully pressing the pressing arm, small leather particles are cut from the leather. The punching tool is inserted with its ejection frame 6 into a holder 10 formed on the magazine 10 and by lifting the knife frame 1 the leather particles trapped in the gaps 4 are ejected by the ejector filaments 2 into the magazine 10. By varying the dimensions .

Claims (3)

OBJECT OF THE INVENTION The punching tool for the chemical analysis of leather consists of a knife frame rotatably connected and an ejector frame, characterized in that the linear knives (2) are interconnected by their bodies (21) and fixed in the knife frame (1) and in the gaps (4). between the cutting edges (22) of the linear knives (2), ejecting fibers (7) are fastened, fixed by 3 ends in the ejecting frame (6).