JPH0584277A - Lever of rotary type powder forming machine - Google Patents

Abstract

PURPOSE:To provide the lever of the rotary type powder forming machine which can prevent a wear breakdown of a lever head part by bringing the lever head part of the lever into line contact with along the outside diameter of a compression ro1l. CONSTITUTION:The lever of the rotary type powder forming machine is constituted so that a key 14 is attached to the upper lever 2 and the lower lever 4 in the rotary type powder forming machine and the levers 2 and 4 are fitted into a rotary board 1, a rotatory by oneself of the upper lever 2 and the lower lever 4 is prevented thereby, the upper lever head part 10 and the lower lever head part 18 are brought into line contact with along the outside diameter 9 of the upper compression roll 5 and the lower compression roll 6, respectively, and a wear breakdown of the upper lever head part 10 and the lower lever head part 18 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary powder characterized in that the punch head is in line contact along the outer diameter of a compression roll to prevent the punch head from being worn away. It relates to the punch of a molding machine.

[0002]

2. Description of the Related Art Conventionally, in a rotary powder molding machine, the outer diameter of the compression roll is in point contact with the outer diameter of the compression roll except for the central portion where maximum compression is applied to the portion of the punch that contacts the outer diameter of the compression roll. It is known that the powder is sequentially compressed.

[0003]

SUMMARY OF THE INVENTION According to the prior art, since the outer diameter of the compression roll and the punch head are pressed in sequence while being in point contact with each other during compression, the punch tip is pressed. It had a fatal problem that the department was worn out and destroyed.

That is, referring to FIG. 1, the upper compression roll 5 of the rotary powder molding machine is on the track of rotation of the rotary disc 1 in which the mortar 3 is fitted, and the center of the rotary disc 1 is the axis. It is located at right angles to the radiation.

Therefore, the upper punch head 10 of the upper punch 2 which rotates in a plane contacts the outer diameter 9 of the upper compression roll 5 during the compression process up to the maximum compression of the powder 7, and then the upper compression roll 5 is pressed. The part in point contact with has a fatal problem of being worn and destroyed by impact and compression force.

Similarly, the lower compression roll 6 of the rotary type powder molding machine is located on the rotating locus of the rotary disc 1 in which the die 3 is fitted, and is positioned at right angles to the radiation centered on the center of the rotary disc 1. is doing.

Therefore, the lower punch head 18 of the lower punch 4 which rotates in a plane contacts the outer diameter 9 of the lower compression roll 6 during the compression process until the powder 7 is compressed to the maximum, and then the lower compression roll 6 is pressed. The part in point contact with has had a fatal problem of being worn and destroyed by impact and compression force.

The present invention has been made in view of the above problems of the prior art, and its object is to make the upper and lower punches and the punch heads of the upper and lower punches of the compression roll. It is an object of the present invention to provide a punch for a rotary powder molding machine, which is capable of preventing the abrasion and destruction of the punch head by making line contact along the outer diameter.

[0009]

In order to achieve the above-mentioned object, the present invention is designed such that a large number of dies are fitted on the circumference of a rotating disk to fill the die holes with powder, and the upper punch and the lower punch are compressed rolls. In a rotary powder molding machine that compresses and molds powder every time it passes through, insert a key or pin etc. on the punch and fit it on the rotary disk.
This prevents the natural rotation of the punch and makes the punch head in line contact along the outer diameter of the compression roll to prevent abrasion and destruction of the punch head. I will provide a.

The punch may be an upper punch. Further, the punch may be a lower punch. Furthermore,
The punch may be an upper punch and a lower punch.

[0011]

Describing with reference to FIGS. 1 to 5, when the mortar 3 is filled with the powder 7 by the rotation of the turntable 1 and the upper punch 2 and the lower punch 4 pass between the upper compression roll 5 and the lower compression roll 6, The improved curve 11 of the upper punch head 10 of the upper punch 2 hits the outer diameter 9 of the upper compression roll 5 at a position x away from the center of the upper punch 2, and from that time, the outer diameter 9 of the upper compression roll 5 The powder 7 is compressed up to the plane portion 13 of the upper punch head 10 while making line contact with the parallel line 16 of the outer diameter of the upper compression roll 5 along the curve of the improved curve 11.

The operation of linearly contacting the point contact between the upper punch 2 and the upper compression roll 5 and the like as described above will be described as follows.

FIG. 3 is a front view showing a contact state between the upper compression roll 5 and the upper punch head 10 of the upper punch 2. In FIG. 3, R is the radius of the upper compression roll 5, and r is the upper punch head. The improved radius of the portion 10, E is the horizontal distance between the improved radius r center of the upper punch head 10 and the center of the upper punch 2, y is the vertical distance between the lower surface of the outer diameter 9 of the upper compression roll 5 and the flat surface 13 of the upper punch head 10, Let Θ be the contact angle of the improved curve 11 between the upper compression roll 5 and the upper punch head 10, and x be the distance between the center of the upper punch 2 and the contact point between the improved curve 11 and the outer diameter 9 of the upper compression roll 5, And x are represented by the following Equations 1 and 2.

[0014]

[Equation 1]

[0015]

[Equation 2]

FIG. 5 is a plan view in which the upper compression roll 5 and the upper punch 2 are arranged on the locus of the upper punch on the rotary disc 1, that is, on the rotary disc pitch circle 20, and in FIG. 5, P is the upper punch 2. Pitch radius, E is the horizontal distance between the improved radius r center of the upper punch head 10 and the center of the upper punch 2, and α is the horizontal angle of the position of the center of the upper punch 2, and α can be expressed by the following mathematical formula 3. .

[0017]

[Equation 3]

Substituting Equation 2 into Equation 3 and rearranging, α
Can be expressed by the following formula 4 as a formula of the variable x.

[0019]

[Equation 4]

In conclusion, when the upper punch head 10 is machined, the upper compression roll 5 can be obtained by processing the upper punch 2 at the angle α at the distance x from the center of the upper punch 2 according to the above formula (4).
The outer diameter 9 and the upper punch head 10 are always in line contact with each other so that the compression process can be performed.

[0021]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a vertical sectional front view of an essential part showing an embodiment of a punch of a rotary powder molding machine of the present invention.
To fill the die hole with the powder 7 and compress the powder every time the upper punch 2 and the lower punch 4 pass between the upper compression roll 5 and the lower compression roll 6 to produce a molded product 8. In the powder type powder molding machine, the key 14 is attached to the upper punch 2 and the lower punch 4, and the key 14 is fitted into the turntable 1 to prevent natural rotation of the upper punch 2 and the lower punch 4, thereby preventing the upper punch head 10 and the lower punch 4 from moving. The upper punch head 10 and the lower punch head 1 are arranged so that the punch head 18 makes line contact along the outer diameters 9 of the upper compression roll 5 and the lower compression roll 6, respectively.
It was designed to prevent the wear and tear of item 8.

In FIG. 1, 11 is an improved curve also shown in FIGS. 3 and 4, and 13 is a plane portion.
Such improved curves and flat portions are also provided on the lower punch 4.

In the embodiment shown in FIG. 1, each punch head of the upper and lower punches is brought into line contact along the outer diameter of each compression roll so that each punch head is worn out. Although the breakage can be prevented, such improvement of the punch may be applied only to the upper punch or the lower punch.

FIG. 2 is an enlarged plan view of the upper punch of the rotary powder molding machine of the present invention, and FIG. 4 is a front view of the main part thereof.
2 and 4, there is a flat surface portion 13 on the top of the upper punch head 10 of the upper punch 2, and a conventional curve 15 is provided on the peripheral edge portion of the flat punch portion 13. The improved curve 11 is obtained by calculating according to 4 and scraping off the grinding portion 12.

In FIG. 2, 16 is a parallel line, 17 is a parallel line contact portion, and in FIG. 4, 14 is a key.

Since FIG. 3 has been described in the section of the above-mentioned action, the description thereof will be omitted here, but 15 is the conventional curve and 19 is the center line of the improved curve.

Since FIG. 5 has been described in the section of the action similar to FIG. 3, the description thereof will be omitted here, but 13 is a plane portion, 16 is a parallel line, and 17 is a parallel line contact portion.

[0O28]

Since the present invention is configured as described above, it has the following effects. That is, a key, a pin, or the like is attached to the punch in the rotary powder molding machine and fitted into the turntable, which prevents the punch from rotating naturally and causes the punch head to make a line contact along the outer diameter of the compression roll. Since it is configured as described above, it is possible to significantly reduce the impact and the compression force and prevent the punch head from being worn and broken. In addition, such improvement of the punch may be performed on both the upper punch and the lower punch, or may be performed only on the upper punch or the lower punch, and in each case, the same effect as described above can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an essential part showing an embodiment of a punch of a rotary powder molding machine of the present invention.

FIG. 2 is an enlarged plan view of the upper punch of the rotary powder molding machine of the present invention.

FIG. 3 is a plan view showing a contact state between the upper punch head and the upper compression roll of the upper punch of the rotary powder molding machine of the present invention.

4 is a front view of the main part of the upper punch of the rotary powder molding machine shown in FIG. 2. FIG.

FIG. 5 is a plan view in which an upper compression roll and an upper punch of the rotary powder molding machine of the present invention are arranged on a locus of the upper punch on the rotary disc, that is, on a pitch circle of the rotary disc.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 rotary plate 2 upper punch 3 mortar 4 lower punch 5 upper compression roll 6 lower compression roll 7 powder 8 molded product 9 outer diameter 10 upper punch head 11 improved curve 12 grinding section 13 plane section 14 key 15 conventional curve 16 parallel line 17 Parallel line contact part 18 Lower punch head 19 Center line of improved curve 20 Rotating disc pitch circle R Radius of upper compression roll r Improved radius of upper punch head E Improved radius of upper punch head Horizontal distance between center and upper punch center y Vertical distance between lower surface of upper compression roll outer diameter and flat surface of upper punch head Θ Contact angle of improved curve between upper compression roll and upper punch head x Contact point between upper punch center and improved curve outer diameter of upper compression roll Distance P Pitch radius of upper punch α Horizontal angle of the center of upper punch

Claims (3)

[Claims] 1. A rotary powder molding machine which fits a large number of dies on the circumference of a turntable to fill powder in a die hole, and compression-molds the powder each time the upper punch and the lower punch pass between compression rolls. In, the key or pin etc. is attached to the punch and fitted into the turntable,
This prevents the natural rotation of the punch and makes the punch head in line contact along the outer diameter of the compression roll to prevent abrasion and destruction of the punch head. . 2. The punch of the rotary powder molding machine according to claim 1, wherein the punch is an upper punch. 3. The punch of the rotary powder molding machine according to claim 1, wherein the punch is a lower punch.