JPS592721B2 - Grinder plate for minced meat machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grinder plate for an internal mill.

The meat put into the grinder is forced into the grinder plate by a rotating screw auger, and the meat press-fitted into the many holes provided in the grinder plate rotates with the screw auger and works together with the plate. The meat is cut by a knife that generates a shearing force, becomes minced meat, and is discharged outside the mincer.

Conventionally, the holes in the grinder plate for the internal grinding machine were precisely machined in the desired number of holes in the disc-shaped steel plate body, which had the drawback of requiring extremely high precision and labor costs. Ta.

In addition, most of the plates and holes in the plate that cooperate with the knife to generate shearing force on the meat were round holes, but polygonal holes cooperate with the knife to generate a higher and sharper shear force. It was known that it gave power to flesh.

However, as described above, even the drilling of round holes requires high precision, so it is almost difficult to machine the desired number of holes into a polygonal shape in the plate body.

Therefore, the present invention aims to make the holes of a grinder plate for an internal grinding machine polygonal so that a high shearing force is generated between the plate and the knife, and to create a grinder plate having a large number of polygonal holes. In the invention, it is manufactured by compression molding and sintering.

Furthermore, the present invention provides self-polishing properties to the grinder plate by impregnating the pores produced in the grinder plate as described above with a porosity of 5 to 15% with mineral oil or vegetable oil.

With conventional internal cutting machines of this type, excessive meat fat accumulates in a part of the machine's cutter during operation, significantly reducing the cutting effect, so mineral oil, etc. is often sprayed on the cutter part. However, the grinder plate according to the present invention has self-polishing or self-washing properties due to the oil impregnated therein, making the above-mentioned oil spraying process unnecessary. Become.

In this invention, the higher the porosity, the more the plate body can be impregnated with a large amount of oil that has the effect of washing meat fat, such as mineral oil or vegetable oil, and the self-polishing or self-washing ability of the plate can be improved. On the contrary, the hardness, tensile strength, etc. of the plate body are reduced, and the physical properties of the plate body as a grinder are impaired.

For example, the hardness and tensile strength when the porosity is 20% are about 2/3 of the values when the porosity is 15%.

Therefore, the porosity of this type of sintered body is preferably about 10% as shown in the example below, which is most stable and suitable for manufacturing, but the physical properties of the plate body as a grinder cannot be maintained. The upper limit of the porosity is 1.
It is 5%.

The lower limit is 5% because it is necessary to impregnate the plate body with an amount of oil that can impart self-polishing or self-washing properties.

Examples will be described below with reference to the drawings.

The grinder plate main body 1 has a polygonal inner edge 3.
It has a hole 2 having a diameter.

The plate body is compression molded with the desired metal powder mixture;
Made by sintering.

A desired number of the polygonal holes 2 are also formed so as to pass through the plate body.

The meat that is force-fed against the plate body and press-fitted into the holes 3 is cut by the shearing force acting between the plate and the knife 4 shown by the chain line in the figure.

This shearing force is greater than when the inner edge 3 of the hole 2 forms an arc.
It is known that the linear or angular shape is larger.

A plate body 1 with a diameter of 69.8 mm and a thickness of 7.9 mm,
A grinder plate of the invention having 120 hexagonal holes 2 was made as follows.

The length of the diagonal line of the inner edge 30 of each hole 2 was 3.7 mm.

A metal powder mixture consisting of 93% by weight of iron, 2% by weight of copper, 4% by weight of nickel, and 1% by weight of carbon was molded into the above shape under a pressure of 6T/i.

This was sintered at a temperature of 1150° C. for 45 minutes under non-oxidizing conditions, and then returned to room temperature under the same conditions to complete the sintering.

This was further heated to 830°C, water quenched, and then tempered.

Further, this plate was immersed in mineral oil or vegetable oil heated to 50 to 80°C for 30 minutes to impregnate the pores in the plate with oil.

The porosity of this plate is 10%.

When the thus obtained grinder plate was attached to a meat mincer and minced meat was performed, the minced meat could be effectively minced with almost no fat adhering to the plate portion.

According to the present invention, a grinder plate having polygonal holes capable of excellent mincing work can be obtained industrially advantageously and easily, and furthermore, this plate has self-polishing and self-washing properties.

[Brief explanation of the drawing]

1 is a plan view showing an example of a grinder plate of the invention, in which a knife cooperating with the plate is shown in chain lines; FIG. 1... Plate body, 2... Curved hole, 3... Inner edge of curved length, 4... Knife.

Claims (1)

[Claims] 1 It has a plate body made by compression molding and sintering a metal powder mixture and a number of holes penetrating the body, and the plate body has a porosity of 5 to 15% and has the effect of washing meat fat into the pores. 1. A grinder plate for an internal grinding machine having self-polishing or self-cleaning buoyancy, characterized in that the plate contains oil such as mineral oil or vegetable oil, and has a polygonal inner edge.