JPH0342199A - Device for clamping stamp and mortar - Google Patents

Abstract

PURPOSE:To easily clamp a stamp and mortar to a holder only by pulling the stamp and mortar with a piston after engaging the stamp and mortar with the piston by inserting petal-like feed of the stamp and mortar into cutout part of the piston and turning them, at the time of exchanging the stamp or the mortar. CONSTITUTION:For example, at the time of exchanging the lower stamp 12, at first, hydraulic oil is removed from a port P in a cylinder 11, and the lower stamp 12 is pushed upward with elastic force of a compressed spring 22 in the piston 13. Then, the lower stamp 12 is turned at about 60 deg. angle to the direction apart from a positioning pin 19 and pulled out upward from upper end of the piston 13 at the posi tion where the cutout part 18 at the upper end of piston 13 coincides with the foot 15 of lower stamp 12. Successively, the lower stamp 12 to be exchanged is fitted in the reverse order to the above. Further, at the time of exchanging the mortar 26, at first, the hydraulic oil is removed from a pressure pump T for clamping of a cylinder 25 and at the same time, the hydraulic oil is introduced into a pressure port S for unclamping, and a piston 27 and the mortar 26 are pushed upward and the mortar 26 is turned at about 45 deg. angle to the reverse side of a positioning pin 33 and pulled out. Successively, the mortar 26 to be exchanged is clamped in the reverse order to the above.

Description

[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention relates to a powder compression molding machine that molds molded products such as tablets by compressing powder raw materials using a punch and a mortar. In particular, the present invention relates to a clamping device for a punch and a mill that allows the punch and the mortar to be easily attached to and removed from a holder.

(Conventional technology) J! 3. To attach the punch to the white holder, install the male screws 46 and 46a' at one end of the upper punch 45 and the lower punch 45a as shown in FIG.
6.46ak holder 47.47aK provided female screw 48,
Screw the upper punch 45, the stepped surface 49 of the lower punch 453, and the A9a to the end face 50.50 of the holder 47.47a.
The upper punch 45 and lower punch 45a are fixed so that they do not come loose by pressing with a plurality of presser square pieces 51. The male screw 56 provided on the outer periphery of the mortar 55 is screwed into the female screw 58 provided on the holder 57, and the upper end surface 59 of the mortar 55 and the upper end surface 6 of the gold holder 57 are fixed with a plurality of presser corner pieces with 7 screws. At 51b, the pressing shear mill 35 is running with all its might so that it does not loosen.

In this way, the holder 47.47a of the upper punch 45 and lower punch 45a
It is necessary to securely fix the product because a large amount of force is applied during molding. Particularly in the case of the mortar 55, if the molded product gnaws the entire inner surface of the mortar 55, a large force is applied to pull out the molded product, so a clamp that can sufficiently withstand that force is required.

(Problems to be Solved by the Invention) In recent years, powder compression molded products have been produced in small quantities with a wide variety of products depending on their use, and it has become necessary to replace the force, punch, and die several times in a day. For this reason, replacement work using conventional equipment takes a long time because it involves attaching and removing screws and pieces, and at the same time, the weight of the mortar is 7 to 1 kg, which poses both safety and other problems.

The present invention was made to solve these problems, and its purpose is to make it possible to easily replace the pestle and white in a short time with a simple operation, and to make it possible to securely clamp the punch. The purpose is to provide a clamping device for Kishima and millstones.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the pestle 'J=- and mortar clamping device of the powder IE compression molding machine of the present invention has a plurality of petal-shaped A punch and a mortar are equipped with legs, and a notch is provided so that the petal-like legs can be inserted and removed.By inserting the pestle and mortar into these notches and rotating them, the pestle and mortar can be attached and removed. It consists of a piston that engages, and a Z-shaped cylinder that pairs with the piston, and when the piston and the punch and die are engaged, the punch button and the die are pulled by the piston to be clamped to the cylinder that serves as a holder. It was designed to do so.

(Function) The pestle and white clamping device for the powder FE compression molding machine of the present invention are configured as described above, so when replacing the pestle and white, the petal-shaped legs of the pestle and white are inserted into the notch of the piston. The punch and the die are simply and securely clamped to the holder by simply inserting and rotating the punch and the piston to engage the punch and the piston, and then pulling the pestle and the die with the piston.

Embodiment C> First, an embodiment of the punch of the present invention, which is a punch of a white clamping device, will be explained with reference to FIGS. 1 to 3.

Figure 1 shows the clamping condition for the lower punch.
(13 is a cylinder that is a holder for clamping and holding the lower punch 12, and 13 is a piston that pulls the lower punch 12 downward and securely clamping it, and there is a cylinder chamber +13 between them.
is formed. 20 and 21 are O rings provided on the piston 13.

Reference numeral 4 designates a lid that serves both to prevent the piston 13 from rotating and to receive a spring, as will be described later. The outer diameter of the lower part of the lower punch 12 is the stepped portion 12a.
K+: It has a stepped shape with a small diameter, and the small diameter part is fitted into the cylinder 11, and the tip (lower end) has a petal-shaped leg 15 as shown in FIG. Fuiteba has a three-pronged metal pattern with three caps. Also, a beam ring 16 is attached to the small diameter portion of the lower punch 12 that is fitted into the cylinder 11.
17 is connected to the device A and passes through the 0 ring 20 to the cylinder chamber +4.
Pressure oil leaking from the a part is leaking upwards and downwards. It's a groove, the stepped part 12 a (d is the part in contact with the upper surface F in the cylinder 11, and the button is pressed, the piston 1
When the lower punch 12 is pulled downward at step 3, the force is applied to the surface F and the stepped portion 12a so that the receiver reliably clamps the lower punch 12 to the cylinder 11.

The upper part of the piston 13 is inserted into an inverted funnel-shaped hole, and at its entrance there is a three-pronged hole at the lower end of the lower punch 12, as shown in FIG. ! +]+5 yen+Dimensions Slightly larger three-pronged notches 18 are provided, and three of the lower pestles 12,
The fork-shaped legs 15 can be easily fitted. Then, the lower punch 12 is fitted into the piston 3, and when the lower punch 12 is rotated approximately 60 degrees as shown in FIG.
A positioning pin 19 for performing positioning (2) is driven downward (1). 1. The lower part of the piston 13 is curved in a reverse circular shape, and a compression spring 22 is installed inside the piston 13. When the pressure oil is removed from the boat P of the cylinder 11, the elastic force of the compression spring 22 causes the piston to compress. I3 is designed to push upward. During this launch, the lower punch 12 is also pushed up, and attached to the lower end of the cylinder.There is a convex protrusion 23 on the piston 35'i of the lid 14, and this protrusion 823 is inserted into a notch 24 provided at the lower end of the piston I3 to prevent the button piston 13 from rotating.

Because of this structure, when replacing the lower punch 12, first drain the royal oil from the boat P of the cylinder II, and then use the elastic force of the compression spring 22 of the piston 13Th to replace the lower punch 12.
push upwards. Then, turn the lower punch 2 approximately 60 degrees in the direction away from the positioning pin 19, and bring the notch 18 at the upper end of the piston 13 into the position where the leg 5 of the lower punch I2 matches (Fig. 2), and then push the upper end of the piston 13 upward. Remove the lower pestle 12.

Next, install the lower punch 12 to be replaced in the reverse order.

That is, after fitting the lower punch 12 into the upper part of the entire piston 13 and turning it with 1, which corresponds to the positioning pin 19, the cylinder boat P
The piston 13 is lowered against the elastic force of the compression spring 22 by applying all the ball oil to the piston 13. During this downward movement, the lower punch 12 is pulled downward and the stepped portion 12a of the lower punch 12 is firmly pressed against the upper end surface F of the cylinder 11 to reliably clamp it.

In this embodiment, the button is explained in the case of the lower punch, but since the configuration is the same in the case of the upper punch, the explanation will be omitted.

'1. In addition, although the compression spring 22 is used to push the lower punch 12 upward when it is removed, it may also be done using a double-acting oil hydraulic cylinder.

Next, a clamping device for a mortar will be explained with reference to FIGS. 4 to 6. Figure 4 shows the Franz condition of the mortar 26, where 25 is a cylinder which is a holder for clamping and holding the mortar 26, 27 is a piston, and 25a is a cylinder 25.
Operating pressure oil is supplied and discharged from the clamp pressure port T in a cylinder chamber formed between the inner step 25b of the piston 27 and the step 2.73 of the piston 27. 28 is a lid.

The inner upper part of the cylinder 25 has a flange 26a at the upper end, and the lower part of the flange 26a has a cylindrical shape with a slightly smaller diameter than the flange 26a, and the lower part has petal-shaped legs as shown in FIG. 30 are arranged in four equal parts (26
is inserted. A wear-resistant liner 31 is implanted inside the tube 26 so that it can withstand long-term use. The piston 27 is provided between the mortar 26 and the lid 28 and is operated so as to reciprocate within the cylinder 25. The upper part of the piston 27 is a reverse funnel similar to the piston I3 for the lower punch 12. As shown in FIG. 5, the upper part of the hole is provided with a notch 32 having a size slightly larger than 1 m30 of the petal shape of the mortar 26.

Positioning bin 33 for positioning near this notch 32
One is provided so as to protrude downward. Also, the inside of the piston 27 is a stepped hole 34, which allows the lower punch 1 to be seen from below.
2 can be inserted into and removed from the mortar 26, and the lower part has a diameter that is one step larger, and there is a stopper pin 3 on the bottom surface of the button.
5 is screwed on, and the head of this bottle 35 is inserted into a hole 36 provided in the lid 28 that restricts the lower limit of the piston 27, so that the piston 27 does not rotate. An unclamping cylinder chamber 28a is located between the lid 28 and the piston 27.
is formed, and operating pressure oil is supplied and discharged from a boat S provided in the lid 28.

37 is an oil seal, 38, 39, △○, and 41 beam rings are installed to prevent leakage of pressure oil for operating the piston 27.

With this structure, when replacing the mortar 26, first drain the pressure oil from the clamping pressure boat T of the cylinder 25, and at the same time introduce pressure oil into the unclamping pressure boat S, and push the piston 27 completely upwards. increase. Due to this pushing up, the collar mill 26 is also pushed upward. In this state, mortar 26
Turn it about 45 degrees to the opposite side of the positioning pin 33, set it to the position shown in Fig. 5, and pull out the mortar 26 upwards.Next, insert the white 26 to be replaced into the inside of the cylinder 25 from above until it hits the positioning pin 33. After turning, the pressure oil is removed from the unclamping pressure port S7) in the opposite direction, and at the same time pressure oil is introduced into the clamping pressure boat T, the piston 27 is lowered, the mortar 26 is pulled downward, and the cylinder The 7-lung lower surface of the mortar 26 is strongly pressed against the upper surface G of the mortar 25 to securely clamp the mortar 26.

Although the operation of the piston 13 and 27 in this embodiment has been explained using hydraulic pressure, it can also be operated using pneumatic pressure.

〔Effect of the invention〕

As explained above, in the present invention, the legs of the pestle and mortar are inserted into the notches and rotated to engage the piston and the pestle, and in this state, the piston is inserted into the notch and rotated. The punch and die can be clamped to the holder quickly and reliably with a simple operation of pulling the punch or die with the holder, making it easy to handle a wide variety of molded products and small quantity production.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the present invention, where Figure 2 is a cross-sectional view showing the lower punch when it is clamped, and Figure 2 is a cross-sectional view taken along the line A-A in Figure 1 showing when the lower punch is inserted and removed. Figure 3 is a cross-sectional view taken along line A-A in Figure 1 showing when the lower punch is clamped;
The figure is a cross-sectional view showing white when clamped, Fig. 5 is a cross-sectional view taken along the line B-B in Fig. 4 showing when the mortar is inserted and removed, and Fig. 6 is a cross-sectional view taken along line B-B in Fig. 4 when the mortar is clamped. A sectional view taken along the line B, and FIG. 7 is a vertical sectional view of the entire punch of a conventional powder compression molding machine, the white part. , 25...Cylinder, 12°゛°lower pestle) 3.27
... Piston, +4.2g ... Lid, 5.30
... Leg, 18.32 ... Notch, 26 ... Mortar. Figure 2 Figure 3 Figure 4 Prisoner Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] In the clamping device for the punch and mortar of a powder compression molding machine that compresses powder raw materials from above and below using two upper and lower punches and one mortar, the punch and mortar have a plurality of petal-shaped legs at one end. a piston in which the leg has a removable notch and the punch and the die are respectively inserted into the notch and rotated to removably engage the punch and the die, respectively; and a cylinder having an oval shape, and the punch and the die are tightened and fixed to the cylinder serving as a holder by pulling the pestle and the die with the piston in a state where the piston is engaged with the pestle and the die. and mortar clamping devices.