JPS5932476Y2 - Rotary powder compression molding machine - Google Patents

Description

[Detailed description of the invention] This invention is to rapidly cool down the heat generated by the rotary disk during compression molding by repeatedly compressing the powder, thereby preventing it from accumulating on the rotary disk. This invention relates to a rotary powder compression molding machine that can perform

Generally, some pharmaceuticals and chemicals are extremely sensitive to heat, and if they are not compression molded at a temperature of about 7° C., they will undergo chemical changes and destroy their tissues.

On the other hand, in compression molding using a rotary powder compression molding machine, the compression heat sometimes exceeds 40°C during compression molding, and when the heat accumulates, the temperature of the rotary disk reaches about 25°C.

Due to these circumstances, in the pharmaceutical industry and the like, it is common practice to put molding machines such as tablet machines in small rooms or to send cold air to people inside the machine covers.

However, the heat generated by the molding machine during compression molding is
This is mainly limited to the area around the rotary die of the rotary disk, so the conventional method of placing the molding machine in a small room or inside a machine cover and blowing cold air to these areas to cool the entire molding machine has poor cooling efficiency, and some There was a risk that the powder would aggregate and make compression molding difficult.

The purpose of this invention is to improve the conventional molding machine and quickly cool down the heat generated by the rotary disk during compression molding.The configuration is explained below with reference to the drawings. It is.

A vertical shaft 1Vc has a hollow hole 3 formed in a hollow shape, a hollow portion 4 formed so as to communicate with the above-mentioned offshore hole 3 to the rotary disk 2 attached to the vertical shaft (IK), and the hollow portion 4. It consists of a communicating discharge hole 5 provided at the lower part of the rotary disc 2, and the cold air sent from the upper part of the vertical shaft 1 is sent through the hollow hole 3 to the hollow part 4'/c of the rotary disc 2, and is discharged. This rotary powder compression molding machine is characterized in that the powder is discharged from the hole 5 to the outside of the machine hook.

In the drawing, 7 is an upper punch, 8 is a lower punch, 9 is an upper compression roll, 10 is a lower compression roll, 11 is a hopper 12 is a feeder, 13 is a machine cover, and 14 is a supply of fresh air or air to the inside of the machine cover 13. Inlet for introducing nitrogen gas, 15
16 is a cold air blowing pipe, 17 is an upper punch guide, and 18 is a hollow part of the upper punch guide through which cold air is sent from the blowing pipe 16 to the hollow hole 3 of the vertical shaft 1. 19 is the cold air discharge cover 2
0 is its discharge pipe.

In operation, the powder that has fallen from the inside of the hopper 11 is filled into the mortar 6 fitted into the rotary disk 2 by the feedshish 12, and when it comes to the compression molding position due to the rotation of the rotary disk 2, the powder is transferred to the upper compression roll 9. The upper punch I and the lower punch 8 compress and mold the powder in the mortar 6 from the lower compression roll 10Vc.

The compressive force in this case is usually about 1200 kg/cd, and this compressive force generates heat.

This heat is transferred to the rotary disk 2 from the outer peripheral surface of the mortar 6, so
It is effective to perform the cooling near the periphery of the mortar 6.

Therefore, in the molding machine of this invention, cold air is sent from the blower pipe 16 into the hollow part 18 of the upper punch guide 17, and then sent to the hollow part 4 of the rotary disk 2 through the hollow hole 3 of the vertical shaft 1. After cooling the heat generated by the rotary disk 2 around the mortar 6, it is sent into the discharge cover 19 through the discharge hole 5 provided at the bottom of the rotary disk 2, and is discharged to the outside of the machine cover 13 through the discharge pipe 20. .

In the case of molding chemical products, it may be necessary to mold them in nitrogen gas; in this case, nitrogen gas is fed into the inside of the machine cover 13 from the inlet 14, and It is only necessary to take it out from the discharge port 15 to the outside of the machine cover 13 and circulate it.

As explained above, according to the rotary powder compression molding machine of this invention, the cold air sent from the top of the vertical shaft is sent to the hollow part of the rotary plate through the hollow hole of the vertical shaft. By allowing the exhaust to be discharged to the outside of the machine through the exhaust hole provided at the bottom, the heat generated around the white part of the rotary disk during compression molding can be quickly and efficiently cooled down, and nitrogen can be discharged to the outside of the machine. Even if it is necessary to mold in gas, this invention does not blow cold air into the machine cover as in the past, so it is possible to combine molding in nitrogen gas and cooling the rotary disk using this invention without any problems. can do.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view showing an embodiment of the rotary powder compression molding machine of this invention. In the drawing, 1 is a vertical shaft, 2 is a rotary disk, 3 is a hollow hole, 4 is a hollow part, 5 is a discharge hole, 6 is white, 16 is a blower pipe, 17 is an upper punch guide, and 18 is an upper punch guide hollow part. , 19
is a discharge cover and 20 is a discharge pipe.

Claims (1)

[Scope of utility model registration request] (vertical shaft) IK hollow hole 3 formed in a hollow shape; a hollow portion 4 formed in the rotary disk 2 attached to the vertical shaft 1 so as to communicate with the hollow hole 3; and a hollow portion 4 that communicates with the hollow portion 4. The cold air sent from the upper part of the vertical shaft 1 is sent through the hollow hole 3 to the hollow part 4 of the rotary disk 2, and is then discharged through the discharge hole 5 into the machine. A rotary powder compression molding machine characterized in that the powder is discharged to the outside.