JPH0740321A - Molding material charging device - Google Patents

Abstract

PURPOSE:To provide a molding material charging device, with which molding material can be measured accurately and, at the same time, uniformly charged in a mold. CONSTITUTION:The device concerned is equipped with a material feeding part 2 for feeding fluid molding material, a mold 3, which is arranged beneath the material feeding part 2, a weight measuring part 4, on which the mold 3 is seated, a movable base 5 for moving the material feeding part 2 to the predetermined position and a controlling part 6, into which signal emitted from the measuring part 4 is inputted and, at the same time, from which signal is outputted to the material feeding part 2 and the movable base 5. The controlling part 6 drives the movable base 5 in accordance with the predetermined procedures and, at the same time, controls the material feeding part 2 in response to the measured value signal sent from the measuring part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding material charging device, and more particularly to a device used in a process of manufacturing a disc brake pad.

[0002]

2. Description of the Related Art Generally, in a process of manufacturing a disc brake pad, a base material is put into a mold, and then a two-layer material is put into the mold to perform press molding (for example, a thickness of about 30 mil). As the base material, generally, a mixture of materials having various specific gravities of about 16 kinds including semi-metallic or metal is used. The two-layer material is mainly made of asbestos.

It is generally known that when the base material is charged, the difference in the material up to the mold is large and the position of the nozzle is fixed, so that the material varies between the portion charged with the material and the surrounding area. Has been. Further, non-uniformity of products may occur due to the above-mentioned specific gravity.

As a conventional example, the base material is 130 grams,
The two-layer material was put in 20 grams each, but because the materials weighed in advance to these values were put into individual molds, the accuracy of the weighing was not sufficient and there was an error in the actual product thickness. Was occurring. Further, conventionally, it was difficult to accurately measure the weight actually put into each mold because the material was put into a plurality of (for example, four) molds at the same time.

By the way, since the brake pad is required to have high dimensional accuracy, it is not allowed that the thickness of the brake pad has an error. Therefore, conventionally, the dimensional accuracy was maintained by cutting to a regular size. This cutting amount is, for example,
It becomes about 0.08 mm for 1 gram of material, and must be cut according to the error.

[0006]

However, maintaining the dimensional accuracy by cutting not only wastes the material but also increases the cost due to the increase in the process time.

Further, if the material before press molding has variations, the quality of the product after molding is deteriorated. The present invention has been made in view of the above matters, and provides a molding material charging device capable of accurately measuring a molding material and uniformly charging the molding material into a mold. To aim.

[0008]

According to the present invention, a material supply section 2 for supplying a fluid molding material 1, a mold 3 installed below the material supply section 2, and a mold 3 are provided. A weight measuring unit 4 for mounting a material, a movable base 5 for moving the material supply unit 2 to a predetermined position, a signal from the measuring unit 4 and the material supply unit 2 and the movable base. A controller 6 for outputting a signal to the table 5, and the controller 6
Is a mold material feeding device that drives the movable base 5 according to a preset procedure and controls the material supply unit 2 in accordance with a measurement value signal from the measurement unit 4.

The material supply section 2 is a material storage section 7.
And a material discharge section 8 for discharging the molding material 1 supplied from the material storage section 7 while stirring.

[0010]

The material supply section 2 supplies the fluid mold material 1 to the mold 3 in a kneaded state. At this time, the movable base 5 moves the material supply unit 2 to an arbitrary position in the horizontal direction according to a signal from the control unit 6. Therefore, the molding material 1 supplied to the mold 3 is supplied to the mold 3 while moving in zigzag or the like along the movement.

At the same time, the weight measuring unit 4 on which the mold 3 is placed measures the weight that changes every moment and sends the information to the control unit 6. Here, when the mold 3 is filled with a predetermined weight, that is, a predetermined amount of the molding material 1, the control unit 6 judges this, and the supply of the molding material from the material supply unit 2 is stopped.

By performing the above operation, the mold material 1 is evenly charged into the mold 3 and the nonuniformity of the material is eliminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The apparatus according to this embodiment properly supplies the molding material 1 from the material supply unit 2 to the mold 3.

The material supply unit 2 includes a drum-shaped material storage unit 7 for storing the mold material 1 and a material discharge unit 8 for discharging the mold material 1 supplied from the material storage unit 7 while stirring. It is configured. The material supply unit 2 can control its inclination, is rotatably supported on a rotating roller 7b, and rotates in a tilt-controllable housing 7a.

This rotation is performed in order to constantly stir the molding material 1. The material discharge section 8 is the material storage section 7.
A bucket 8d that receives the molding material 1 that has fallen from the bucket 8d and a cutting screw 8c that is rotatably provided in the bucket 8d are provided. The bucket 8d has a discharge nozzle 8b on its side surface, and the tip of the cutting screw 8c is fitted in the discharge nozzle 8b. The screw 8c is configured to be rotated by a motor 8a so that the molding material 1 supplied into the bucket 8d can be discharged to the outside from the discharge nozzle 8b. This allows the fluid mold material 1 to be supplied in a kneaded state.

The material supply unit 2 having the above-described structure is mounted on the movable base 5. The movable base 5 is a so-called XY table, and is for moving the material supply unit 2 to an arbitrary position in the horizontal direction. And this movable base 5
Is provided with an X-axis motor 5a and a Y-axis motor 5b, and is configured so that the material supply unit 2 can be arbitrarily moved in the XY directions. The motors 5a and 5b are controlled by the controller 6. The control unit 6 includes a microcomputer, a memory, and a program, and operates the motors 5a and 5b according to the procedure set in the program.

A mold 3 is provided below the discharge nozzle 8b. The mold 3 is placed on the weight measuring unit 4, and the total weight of the mold 3 is constantly measured. The weight measuring unit 4 can output a weight value, and the information is input to the control unit 6. The bucket 8d is provided with a sensor 8e (for example, an optical sensor) that measures the deposition position of the molding material 1, and the output of the sensor 8e is also input to the control unit 6. Further, the motor 8a is controlled by a control signal from the controller 6.

The operation data stored in the control unit 6 is
It is as shown by the arrow F in FIGS. That is, as shown in FIG. 2, in the case of advancing the material supply unit 2 in a zigzag manner with respect to the mold 3, in the case of advancing in a rectangular shape as shown in FIG. It can be illustrated. The reason for advancing in such a non-linear manner is to uniformly disperse the molding material 1 in the mold 3.
Of course, it is possible to perform various operations such as drawing a spiral.

FIG. 5 shows an example in which the apparatus 20 is applied to an actual manufacturing apparatus. In this system, various devices are arranged around the table 26, and the robot hand 23 provided at the center of the table 26 sequentially moves the mold 3 to pass a predetermined manufacturing process. Here, the present apparatus 20 shown in FIG. 1 is used for introducing a base material in the molding material 1, and the present apparatus is used for introducing a two-layer material in the molding material 1 at a position advanced by 90 degrees from the apparatus 20. Input device 21 similar to 20
Is arranged.

A pressing device 22 is arranged at a position advanced 90 degrees from the loading device 21, and an external robot hand 25 for moving the mold 3 to the outside is provided at a position advanced 90 degrees from the pressing device 21. There is. The robot hand 23 has expandable and retractable arms 24 in four directions so that the molds 3 placed corresponding to the respective devices can be simultaneously transferred. The weight measuring unit 4 is fixed at a position corresponding to the present device 20 and the loading device 21, respectively, and the mold 3 placed on it is fixed to the robot hand 2 described above.
It is moved in the direction of the arrow G by 3 in sequence. In addition,
Servo motors or stepping motors are used as the motors used in the respective parts.

The operation of the above configuration will be described. From the discharge nozzle 8b of the material supply unit 2, the fluid mold material 1 is supplied to the mold 3 in a kneaded state.
At this time, the movable base 5 moves according to a signal from the controller 6 as shown in FIGS.
To move.

As a result, the molding material 1 supplied to the die 3 is supplied to the die 3 while moving in a zigzag manner along the movement of the molding material 1 and is uniformly dispersed. At the same time, the weight measuring unit 4 on which the mold 3 is placed measures the ever-changing weight and sends the information to the control unit 6. Here, the control unit 6 judges that a predetermined weight, that is, a predetermined amount of the molding material 1 is filled in the mold 3, and stops the motor 8a to stop the supply of the molding material from the material supply unit 2. At the same time, the operation of the movable base 5 is stopped.

By the above operation, the mold material 1 is charged into the mold 3 on average.
Eliminates non-uniformity of material. Then, the mold 3 is grasped by the arm 24 of the robot hand 23 and moved to the adjacent loading device 21. In this charging device 21, a predetermined amount of the two-layer material is similarly charged into the mold 3, and then the robot hand 23
The arm 24 holds the mold 3 and sends it to the adjacent press device 22, and presses it from above and below. After the pressing, the die 3 is gripped by the arm 24 of the robot hand 23 and delivered to the adjacent external robot hand 25. In addition, this external robot hand 25
Also serves to supply the mold 3 from the outside.

When the amount of the molding material 1 in the bucket 8d is low, the sensor 8e detects this and the control section 6 sends a signal to the effect that the molding material 1 is added. As described above, according to this embodiment, the material supply unit 2 is
Since the mold material 1 is charged by moving the mold material 1 while kneading the mold material 1, the mold material is uniformly charged into the mold 3. Therefore, it is possible to provide a high-quality molded product having no material variation.

In addition, since the weight measuring unit 4 accurately measures the weight in each molding material charging process, the product dimension becomes accurate and there is no need to correct it in the subsequent process. Alternatively, the dimensional modification of the product can be performed in a very small amount, which can reduce the machining time and the cost.

[0026]

According to the present invention, the molding material can be accurately weighed and the material can be uniformly charged into the mold.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing an embodiment of the present invention.

FIG. 3 is a plan view showing a second mode of charging a molding material showing an embodiment of the present invention.

FIG. 4 is a plan view showing a third mode of charging a molding material showing an embodiment of the present invention.

FIG. 5 is a plan view showing an embodiment of the present invention.

[Explanation of symbols]

 1. Mold material 2. Material supply unit 3. Mold 4. Weight measurement unit 5. Movable base 5a, 5b .. Motor 6. Control unit 7. Material storage unit 7a .. Housing 7b ..Rotating roller 8..Material discharge part 8a..motor 8b..discharge nozzle 8c .. (cut out) screw 8d..bucket 8e..sensor 20 .. (main) device 21 .. Device 23 ... Robot hand 24 ... Arm 25 ... External robot hand 26 ... Table

Claims (2)

[Claims] 1. A material supply unit for supplying a fluid mold material, and a mold installed below the material supply unit,
A weight measuring unit on which the mold is placed, a movable base for moving the material supply unit to a predetermined position, and a signal from the measuring unit are input to the material supply unit and the movable base. A control unit for outputting a signal, wherein the control unit drives the movable base according to a preset procedure, and controls the material supply unit according to a measurement value signal from the measurement unit. Mold material injection device. 2. The mold according to claim 1, wherein the material supply unit includes a material storage unit and a material discharge unit that discharges the molding material supplied from the material storage unit while stirring. Material feeding device.