JPH11270603A - Spare formation device of disk brake pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spare formation device which manufactures spare compacts of a disk brake pad efficiently and automatically. SOLUTION: Structural elements are operated automatically which are composed of a first plate makeup part A to carry a plate 2 coated by an adhesive to a specific position; a high-frequency heater B to heat the plate 2 to a specific temperature; a second plate makeup part C to carry the heated plate 2 onto the insert 100 of a press main body D; a hopper input part F to move the scaled granuation material onto the insert 100; a conditioning part G to make the granuation material inside the die 94 of the press main body D even; the press main body D to heat and form the plate 2 and the granuation material at a specific pressure; a handling part H to carry spare compacts 1; and a second conveyer I to move the spare compacts 1 to the next process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake pad used for braking various vehicles such as automobiles and railways and industrial machines. More specifically, the present invention relates to a preforming apparatus for providing a heat insulating layer on a plate to which a friction material is bonded.

[0002]

2. Description of the Related Art Disc brake pads are made by applying a thermosetting resin such as phenolic resin to an iron plate and bonding a friction material to the plate by heat molding. Generally, a surface is polished or a plate is subjected to rust-proof coating.

[0003] However, recent disk brake pads have been improved in braking performance as the performance of vehicles has been improved.
Since stable braking performance is required in a wide temperature range, friction materials have been changed from those mainly composed of asbestos, which may harm health, to non-asbestos materials mainly composed of metal and mineral fibers.

[0004] Various problems have occurred with the change of the friction material. However, those made mainly of metal or mineral fibers do not have heat insulating properties like asbestos and have high heat conductivity, so that they have a high frictional sliding surface. The generated heat easily reaches the bonding surface with the plate via the friction material, and the adhesive may be thermally degraded and the friction material may be separated. Furthermore, due to differences in the thickness and flexibility of the fibers of the friction material, the adhesion to the plate is lower than that of asbestos.

Therefore, a heat insulating layer is provided between the plate and the friction material, and a material which emphasizes friction performance is used on the friction sliding surface side, and a material which emphasizes adhesion to the plate is used on the bonding surface side. The friction material such as is multi-layered. For example, Japanese Patent Application Laid-Open No. 58-211031 proposes a technique for preforming a heat insulating layer containing a friction material in the form of a tablet. This conventional technology increases the material density around the mold hole provided in the plate to prevent the penetration of moisture from the mold hole, rusting on the bonding surface with the plate and rusting on the interface of the semi-metallic friction material. It is to prevent.

FIG. 15 is a cross-sectional view of a press device proposed in the above publication where a heat insulating layer containing a friction material is filled. When filling the friction material 201 and the heat insulating layer 202 into the die B and the insert D supported by the spring F on the lower mold C, the compression ratio of the heat insulating layer 202 at the lower punch E corresponding to the mold hole 203 is increased. More, lower mold C
Is pressurized upward at the pressure of P1 and the upper punch A is pressed downward at the pressure of P2, and is preformed into a tablet shape, which is shown in a cross section of the disc brake pad of FIG. 16 by another thermoforming mold. Thus, the disk brake pad molded body is formed by bonding to the plate 204, heating and pressing.

[0007] In the disk brake pad formed in this manner, the density of the heat insulating layer in the mold hole is increased, and the intrusion of moisture from the portion can be prevented. As a result, the generation of rust due to the intrusion of moisture is prevented. However, it is described that a friction material which does not have to worry about falling off of the semi-metallic friction material from the interface with the heat insulating layer can be provided.

Another prior art of preforming is disclosed in
Japanese Patent Application No. -145097 discloses that a granulating material is used as a material of a heat insulating layer in contact with a plate, and a mold is preheated before the granulating material is put into the mold. The granulated material is charged at a temperature at which it does not proceed, integrated with the plate by preforming, the integrated material is set in another thermoforming mold, a friction material is charged, and heat is applied at a temperature higher than the temperature at which the binder undergoes a curing reaction. A method for manufacturing a molded disc brake pad has been proposed.

FIG. 17 shows an outline of a process of manufacturing a disc brake pad by setting a preform integrated with the plate in another thermoforming mold. First A
In the process, a heat insulating layer 302 made of a granulated material and a plate 301
Is placed on a lower mold 305 and set on a die 306 having a cavity conforming to the shape of the heat insulating layer 302. In the next step B, the cavity of the die 306 is filled with the friction material 303. Then, in step C, the upper die 307 is thermoformed at a temperature higher than the temperature at which the binder undergoes a curing reaction while being pressed together with the upper punch 308 in the direction of the arrow.
Finally, in step D, the upper mold 307 and the lower mold 305 are opened, and the disc brake pad 310 is taken out.

[0010] The disk brake pad formed in this manner uses a granulating material for the heat insulating layer in contact with the plate, thereby suppressing dust in the preforming operation, improving the working environment, and at the same time forming the plate brake during the preforming. By integrating, the number of parts to be handled can be reduced.
It is described that the interface strength can be provided without any processing on the interface with the friction material.

[0011]

Problems to be Solved by the Invention JP-A-58-2110
In the prior art disclosed in Japanese Patent Application Laid-Open No. Hei 8-145097, even if the material density around the mold hole in the heat insulating layer is increased to suppress moisture intrusion and prevent the generation of rust, Since no granulated material is used in the layer, the gap between the granulated materials is reduced by the melt flow of the binder during the final thermoforming, and at the same time, the fibers etc. in the friction material are pushed into the gap between the granulated materials. Therefore, it is not possible to expect tough interface fixation by forming geometrical irregularities on the surface and assisting the adhesion by the binder.

Further, it is not possible to reduce the number of parts to be handled by suppressing the generation of dust in the preforming operation, improving the working environment, and integrating the plate with the plate during the preforming. The present invention proposes a disc brake pad preforming apparatus for efficiently and automatically manufacturing a preformed product disclosed in Japanese Patent Application Laid-Open No. Hei 8-145097.

[0013]

SUMMARY OF THE INVENTION A pre-forming apparatus for a disc brake pad, comprising: a first plate loading section for conveying a plate coated with an adhesive to a predetermined position; and heating the plate to a predetermined temperature. A heating unit, a second plate loading unit that transports the heated plate onto the insert of the press body, a hopper loading unit that moves the weighed granulated material onto the insert, and a die inside the die of the press body. A leveling unit for leveling the granulated material, the press body for heating and molding the plate and the granulated material at a predetermined pressure, a handling unit for unloading a preformed product, and the preformed product for the next step. Each component constituted by the moving second conveyor unit is automatically operated.

The heating unit automatically measures the temperature of the plate conveyed from the first plate loading unit and compares it with the target set temperature to learn and control the heating output, so that the shape and thickness of the plate can be reduced. Even if the heat capacity is changed, the plate temperature can be controlled to a temperature range in which the binder in the granulating material as the heat insulating layer is melted and the curing reaction does not proceed.

The leveling portion for leveling the granulated material inside the die of the press body is formed by using a comb-shaped stirrer adapted to the shape of the preform and under any amplitude and frequency. Flatten the surface of the granulation material.

If the initial position of the lower punch of the press body can be set at an arbitrary position with respect to the insert, it is possible to adjust the density of the granulated material corresponding to the change in the hole diameter of the mold hole or the plate thickness of the plate. Becomes possible.

If the upper press and the lower press of the press body are synchronized or set so that the lower press is operated after the upper press is operated, the granulated material is prevented from escaping by the lower punch entering first, and the periphery of the mold hole is prevented. Can appropriately increase the density of the granulated material.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk brake pad preforming apparatus according to the present invention will be described below in detail with reference to the drawings. FIGS. 1A, 1B and 1C are conceptual diagrams of the preforming apparatus. Details of each component will be described separately based on an embodiment.

FIG. 1A shows a pre-process in which the loaded plate 2 is positioned, conveyed to a heating unit, preheated, and then set on a press body. First plate loading section A
Is a first conveyor unit 10 for transporting the plate 2 coated with the adhesive, and the plate 2 is attracted by a magnet,
It is constituted by a handling unit 20 that moves the heating unit of the positioning unit 30 and the high-frequency heating unit B. The plate 2 preheated to a predetermined temperature in the high-frequency heating unit B is again attracted to the magnet and is sent from the second plate input unit C
It is set on the insert 100 of the press body D.

FIG. 1 (b) shows a middle step of charging a granulated material from the raw material tank E onto the insert 100 of the press body D. The granulated material stored in the raw material tank E having an automatic weighing function is temporarily stored in the hopper input section F, and is discharged into a space surrounded by the die 94 and the insert 100 of the press body D. At this time, the lower punch 103 of the press body D
Waits at a position in the insert 100 where the material density of the mold hole is high. On the other hand, the leveling part G has a comb-shaped stirrer and flattens the surface of the granulated material.

FIG. 1C shows a subsequent step of moving the preformed article 1 thermoformed by the press body D to another thermoforming mold. Upper punch 98 and lower punch 1 of press body D
03, the preformed product 1 formed by thermoforming under pressure is raised, the die 94 is raised, the lower punch 103 is lowered, the press body D is opened, and the preformed product 1 is placed on the magnet 126 of the handling unit H. It is adsorbed and moved on a conveyor section I to be moved to another thermoforming mold.

Next, details of each component will be described. FIG. 2 is a perspective view showing an outline of the first conveyor unit 10 which constitutes a part of the first plate loading unit A. As the material of the plate 2, a hot or cold rolled steel plate stamped with a sheet metal press is used. After washing, the plate 2 is subjected to a shot blasting treatment to remove an oxide film on the surface and oils and fats of a sheet metal press, and an adhesive such as a phenol resin is applied and dried. The plates 2 thus prepared are artificially and randomly arranged in a predetermined direction along the guide rails 13 with the bonding surface facing upward. Plate 2 on belt conveyor 12 installed on pedestal 11
Is intermittently transferred by a motor (not shown) that receives a signal transmitted from the position detection sensor 14 and controls the speed.

FIG. 3 is a perspective view showing an outline of the handling unit 20 which constitutes a part of the first plate loading unit A.
A cylinder 22 is housed in the frame 21,
When the optical or mechanical position detection sensor 14 installed on the side of the belt conveyor 12 is guided to the position where the plate 2 is caught, and detects that the plate 2 comes directly below the magnet 24, A signal is sent to a first control unit provided separately, and the elevating device 25 descends to attract the plate 2 to the tip of the magnet 24. The elevating device 25 moves to the positioning unit 30 while moving up in synchronization with the attraction of the magnet 24.

FIG. 4 is a perspective view showing an outline of the positioning section 30 which constitutes a part of the first plate insertion section A. A posture correction jig 32 and a clamp cylinder 33 are arranged on the plate base 31, and the magnet 24 is mounted on the plate base 31.
When the lifting device 25 is lifted by opening the plate 2, the clamp cylinder 33 is driven by a command of the first control unit that receives the signal, and the plate 2 is pressed against the posture correcting jig 32 side, and the plate 2 Prepare your posture. The clamp cylinder 33 has a built-in stroke sensor, and when the posture correction is completed, automatically retracts to the standby position, and again the first controller controls the lowering device 25 to lower and attract the plate 2 by the magnet 24 again. Issue a command from. When the attraction of the magnet 24 is completed, the elevating device 25 moves up and down the heating table 4 of the high-frequency heating unit B shown in FIG.
The cylinder 22 operates to move the plate 2 on the cylinder 1.

The magnet 24 that has moved the plate 2 onto the heating table 41 returns to the standby position of the plate 2 of the first conveyor unit 10 that has been intermittently stopped. The magnet 24 of the first plate input unit A that moves the plate 2 between the first conveyor unit 10, the positioning unit 30, and the high-frequency heating unit B
Can be provided in plurals to take two pieces,
The work tact can be shortened by providing a plurality.

FIG. 5 is a perspective view showing the outline of the high-frequency heating section B. The form of the heating unit is not limited to the high frequency, and may be an electric heater or the like. Heating table 41
The plate 2 which has moved to the position shown in FIG.
2 is inserted to make the positioning accuracy accurate, and when the operation of the elevating device 15 of the handling unit 20 is completed, the cylinder 44 housed in the frame 43 is operated, and the heating table 41 is connected to the heating coil 45 side. And stops at a predetermined position by the stroke sensor.

The temperature of the plate 2 on the heating table 41 is measured by a non-contact plate temperature detector 46 at an initial temperature and by a non-contact plate temperature detector 47 at a preheating rise temperature.
In response to a command from the first control unit receiving the signal, the plate 2
Is output to the heating coil 45. The set preheating is preferably from 70 to 120 ° C. within a range in which the melting of the adhesive starts and the curing reaction of the curing agent in the heat insulating layer 3 does not proceed. When the plate temperature detector 47 confirms that the plate 2 has reached the preheating temperature in the set area, the magnet 55 of the second plate input part C attracts the plate 2 and when the lifting device 53 completes the ascent, the heating table 41 The cylinder 44 returns to the original standby position.

FIG. 6 is a perspective view showing the outline of the second plate loading section C. The second plate loading section C is a unit similar to the handling section 20, in which a cylinder 54 with a stroke sensor is arranged in a frame 51, and a magnet 55 is installed in an elevating device 53 attached to the movable section 52. I have. The preheated plate 2 is attracted to the magnet 55 and moves onto the insert 100 of the press body D where the stroke sensor is stopped, and the insert 100
The plate 2 is opened in the plate guide 101 of FIG.
At the same time, receiving the signal from the first control unit,
5 returns to the standby position while being raised by the lifting device 53.

FIG. 7 is a perspective view showing an outline of a process of automatically weighing the granulated material in the raw material tank E in which the granulated material is stored. Below the funnel-shaped opening of the tank 61, a vibrating feeder 62 that is slightly vibrated by an electromagnetic coil 63 is arranged, and transfers the granulated material to the automatic weighing shooter 64 while rolling. The weight of the shooter 64 is measured by the load cell 65 including the weight of the granulated material. When a set completion signal of the die 94 of the third control unit, which will be described later, is received, the shooter 64 is always shut off when it reaches a predetermined weight. The gate 66 is opened by a signal from the load cell 65 and discharges the granulated material to the lower hopper input section F. The gate 66 is shut off again after the release of the granulated material.

The hopper 67 in which the granulated material is once stored in the hopper input section F is provided with a cylinder 68 having a stroke sensor.
The press body D starts to move in the direction of the die 94 in response to a command from a separately provided second control unit that is supported by the yoke 69 and receives the opening signal of the gate 66. The hopper 67 that has entered just above the die 94 receives the signal from the stroke sensor and opens the bottom gate 70 with an air chuck.
The granulated material is put into a space surrounded by the insert 4 and the insert 100. After the set time, the bottom gate 70 is closed, and the cylinder 68 that has received the command from the second control unit moves backward and returns directly below the shooter 64.

Incidentally, the components of the granulating material are aramid, copper, and ceramics as fiber fibers, graphite, cashew dust, calcium hydroxide, barium sulfate, and some other unvulcanized rubber as fillers, and as binder resins. It is preferable to uniformly mix a phenolic resin and the like, extrude a string using a disk peller made of Fuji Paudal, and then cut into granules.

FIG. 8A is a perspective view showing an outline of the equalizing portion G. The movable part 72 of the cylinder 71 with the stroke sensor is provided with a comb-like stirring device 7 via an elevating device 73.
4 is held. A rod 77 extending from the comb tooth head 75 is slidably supported in a slide bearing 76 fixed to the elevating device 73, and has an eccentric crank 78 on a side surface of the slide bearing 76 and a side surface of the comb tooth head 75. The spaces are connected by a connecting rod 79.

FIG. 8B is a conceptual diagram for explaining the operation of the equalizing section G. When the cylinder 68 moves backward, the second control unit moves the movable unit 72 to the cylinder 71 in the direction of the arrow A.
Lowers the comb tooth head 75 into the die 94 of the press body D in the direction of arrow B. When descending to a predetermined position, the eccentric crank 78 starts rotating in the direction of arrow C and vibrates the comb tooth head 75 in the direction of arrow D via the connecting rod 79 to flatten the surface of the granulated material as the heat insulating layer 3. Smooth out. At this time, the lower punch 103 of the press body D waits in the insert 100 at a position where the density of the granulated material in the mold hole 4 becomes high. Thereafter, the comb tooth head 75 returns to the initial standby position upon receiving a command opposite to the above from the second control unit.

FIG. 9 is a front view showing an outline of the press body D. FIG. 9 shows a state in which the plate 2
Shows a state immediately before is input. Reference numeral 81 denotes a press frame base, and press columns 82 at four corners have lock nuts 83a.
It is fixed at. Hydraulic cylinder 84 of upper press
Is fixed to the press column 82 via the upper frame 85 with a lock nut 83b. On the other hand, the hydraulic cylinder 86 of the lower press is fixed to the press column 82 via the lower frame 87 with a lock nut 83c.

The upper cylinder head 88 is fixed to an upper press guide 89 so as to be able to slide up and down with guides at the four corner press columns 82 as guides. The lower cylinder head 90 is fixed to a lower press guide 91 so that the lower cylinder head 90 can slide up and down with the press columns 82 at the four corners as guides. A die set 93 having die posts 92 at four corners is arranged between the press frame 81 and the upper cylinder head 88.

In the die 94 with a heater, a space 95 having the same outer shape as that of the heat insulating layer 3 is provided at the center.
6 and connected to a die lifting cylinder 97, and can operate independently of the hydraulic cylinder 84 while being guided by the die support 92. The die lifting cylinder 97 includes an upper plate 85.
It is fixed to. The upper punch 98 with a heater engages with the slide groove 99 of the upper cylinder head 88 and moves up and down while being guided by the die support 92.

A die support 92 is fixed to the insert 100 with a heater, and a plate guide 101 having a projection smaller than the thickness of the plate 2 is provided. Mold hole 4
Lower punch hole 102 of insert 100 corresponding to the position of
The lower punch 103 engages with the slide groove 104 of the lower cylinder head 90 and moves up and down while being guided by the lower punch hole 102.

Next, the operation of the press body D will be described. Since the press columns 82 are open on all sides, the second plate input section C enters the center insert 100 from the east side, for example, and the hopper input section F inputs granulated material from the west side. It is also possible to flatten the surface of the granulated material in the refining section G and to carry out the preform 1 in the handling section H from the north side.

FIGS. 10A, 10B, and 10C show the operation of the press body D when the heat insulating layer 3 is adhered on the plate 2 and the preform 1 is formed. FIG. 10A is a partially enlarged view showing a state in which the preheated plate 2 is set on the insert 100. The plate 2 carried in from the second plate loading section C is set in the plate guide 101 of the insert 100 fixed to the press frame 81.

At this point, the die 94 is suspended by the die lifting cylinder 97 via the flange 96 guided by the die set support 92, and is on standby at the upper press side. Further, the lower punch 103 is waiting at a position where the density of the granulated material increases while being guided by the lower punch hole 102 corresponding to the position of the mold hole 4.

FIG. 10B is a partially enlarged view showing a state in which the granulated material serving as the heat insulating layer 3 has been charged from the hopper 67 into the space 95 surrounded by the insert 100 and the lowered die 94. The third control unit that has received the signal that the plate 2 has been set in the state of FIG. 10A lowers the die lifting cylinder 97 and sets the die 94 on the plate 2. The signal of the stroke sensor of the die elevating cylinder 97 is transmitted from the second control unit to the raw material tank E via the third control unit, and the granulated material is charged. The operation of the equalizing section G in the next step is as described with reference to FIG.

FIG. 10C is a partially enlarged view showing a state in which the upper punch 98 is lowered and the heat insulating layer 3 is preformed. The third control unit receives a signal from the second control unit that the comb tooth head 75 of the leveling unit G has returned to the initial standby position, and firstly, the upper cylinder head 8 fixed to the upper plate 85
8 is instructed to lower the upper punch 98 along the die post 92 into the cavity 95 of the die 94.

A heater is built in the die 94 and the insert 100, and the heater is 70 to 70 which is equal to the preheating range of the plate 2.
The temperature is maintained at 120 ° C. by the third control unit. Upper punch 9
8 presses the granulated material at a pressure of 100 to 150 kg / cm ² . Subsequently, the third control unit moves the lower press guide 91 to the lower punch 103 along the press column 82 on the lower cylinder head 90 fixed to the lower frame 87.
The upper punch 98 is guided by the lower punch hole 102.
Command to increase at the same pressure as. From a few seconds to one
The heat insulating layer 3 is adhered onto the plate 2 by heating and pressing for several seconds, and the preform 1 is formed.

FIGS. 11 (a) and 11 (b) are partially enlarged views of the periphery of the insert 100 for explaining a knockout operation which is a step of releasing the preform 1 from the mold. FIG. 11A is a partially enlarged view showing the initial movement of the upper punch 98. After an arbitrary pressurizing time, the third control unit commands the upper cylinder head 88 to raise the upper punch 98 by the distance L1.

Next, as shown in the partial enlarged view of FIG. 11B, a command is issued to the die lifting / lowering cylinder 97 to raise the die 94 beyond the distance L1. With this operation, the preform 1 temporarily raised together with the die 94 comes into contact with the upper punch 98 and is completely released. Finally, plate 2 is the plate guide 1
A command is sent to the cylinder head 90 of the lower press to raise the lower punch 103 by a distance L2 away from 01. When a series of knock-out operations is completed, the press body D moves the die 94, the upper punch 98, and the lower punch 10 to the standby positions in FIG.
3 is restored.

FIG. 12 is a perspective view showing an outline of the handling unit H. A cylinder 122 is accommodated in the frame 121, and the movable unit 123 of the cylinder 122 has
24 is provided, and a magnet 12
6 are installed. Upon receiving a signal from the third control unit that the press body D is at the standby position, the magnet 126 enters just above the preform 1 on the insert 100,
In accordance with a command from the stroke sensor, the lifting / lowering device 124 descends and sucks the preform 1. After a predetermined time, the elevating device 124 moves up, moves the preformed product 1 onto the conveyor unit I by the operation of the cylinder 122, and opens the preformed product 1 according to the instruction of the stroke sensor.

FIG. 13 is a perspective view showing an outline of the second conveyor section I. The belt conveyor 132 provided on the gantry 131 is continuously driven by an electric motor (not shown), and the preformed product 1 released from the magnet 126 is
The friction material is artificially collected while sequentially moving so as to be put into another thermoforming mold for obtaining a disc brake pad molded body by overlapping.

The position, stroke, and temperature sensors, timers, and actuators such as magnets and cylinders installed in each component are appropriately combined with known techniques, and are controlled by the first, second, and third control units. The sequence and the sequence are not limited to the described method.

In order to automatically execute a series of steps until the plate 2 to be artificially placed in the first plate loading section A is recovered by the second conveyor section I, the steps in the flowchart of FIG. Is preferred.

First, in the first step, the plate 2
And move to the press body D. (1) On the belt conveyor 12, the adhesive is applied artificially in a fixed direction with the adhesive applied side up. (2) Attract by the magnet 24 of the handling unit 20 and move to the positioning unit 30.
(3) The posture of the plate 2 is adjusted by the posture correction jig 32. (4) Attract by the magnet 24 of the handling unit 20 and move to the high frequency heating unit B. (5) Heating table 4
The temperature of plate 2 on 1 is measured. (6) Heat to the preheating temperature by the heating coil 45. (7) Check that the plate 2 is in the preheating temperature range. (8) Adsorb to the magnet 55 of the second plate input section C and move to the press body D. In the steps of the preceding process, the operation between the minus and the right is monitored and controlled by the first control unit.

In the middle stage, the granulated material stored in the raw material tank E is automatically weighed, and the surface of the granulated material inside the die 94 is flattened. (9) When the plate 2 is received in the press body D, (10) the die 94 is lowered. on the other hand,
(11) The granulated material is stored in the raw material tank E. (1
2) The granulated material is rolled on the shooter 64 by the vibrating feeder 62 immediately below the funnel-shaped opening of the tank 61. (13) Measure with the load cell 65 attached to the shooter 64.
(14) Open the gate 66 and charge the granulated material into the hopper 67. (15) The cylinder 68 moves directly above the die 94 to open the bottom gate 70 and discharge the granulated material in the hopper 67. (16) Upon receiving the retreat signal of the cylinder 68, the comb tooth head 75 moves forward at the cylinder 71. (17) The comb tooth head 75 is lowered into the die 94 by the lifting device 73. (18) Comb-tooth head 7 with eccentric crank 78
5 is vibrated to flatten the surface of the granulated material. The steps of this middle step are monitored and controlled by the second control unit to monitor the operation between-.

In the latter step, the preform 1 is thermoformed by the press body D and moved to another thermoforming die. (1
9) Upon receiving a signal indicating that the comb tooth head 75 has returned to the standby position, the upper punch 98 is lowered. (20) Lower punch 1
03 is raised. (21) Press and hold for a predetermined time. (22) A knockout operation is performed to release the preform 1 from the mold. (23) The upper punch 98 is raised. (2
4) Lower the lower punch 103. (25) The die 94 is raised. (26) Magnet 1 of handling part H
At 26, the preform 1 is sucked, and the cylinder 122 is driven to move to the conveyor section I. (27) Belt conveyor 1
The preform 1 on 32 is transferred to another thermoforming mold. In the steps of this latter step, the operation between the minus and the right is monitored and controlled by the third control unit.

[0053]

In the first step, the plate is adjusted to a position suitable for automatic conveyance, and the plate is preheated to an arbitrary temperature range so that a temperature gradient does not occur in the granulated material in contact with the plate bonding surface during press forming. In the middle stage process, the automatic weighing and leveling work was automated using a granulated material as the heat insulating layer, and the work accuracy and work environment were improved. In the latter step, the automation of the loading of the plate into the press body, the thermoforming of the preformed product, and the automation of the unloading were achieved, and the working time was reduced and the press time was shortened by using the granulated material.

By automatically operating each of the above steps,
It is possible to save labor, improve work safety and improve the environment, and efficiently provide preforms of disc brake pads with stable quality.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an outline of a disc brake pad preforming apparatus of the present invention. (A): It is an arrangement drawing of each unit of a former stage process. (B): It is an arrangement drawing of each unit of a middle stage process. (C): It is an arrangement view of each unit in a subsequent step.

FIG. 2 is a perspective view showing an outline of a first conveyor section of the present invention.

FIG. 3 is a perspective view showing an outline of a handling unit of the present invention.

FIG. 4 is a perspective view showing an outline of a positioning unit of the present invention.

FIG. 5 is a perspective view showing an outline of a high-frequency heating unit of the present invention.

FIG. 6 is a perspective view showing an outline of a second plate loading section of the present invention.

FIG. 7 is a perspective view showing an outline of a raw material tank and a hopper charging section of the present invention.

FIG. 8 is an explanatory diagram of an outline and operation of an equalizing unit according to the present invention. (A): It is a perspective view which shows the outline | summary of a leveling part. (B): It is a conceptual diagram explaining operation | movement of an equalizing part.

FIG. 9 is a front view showing an outline of the press body of the present invention.

FIG. 10 is an explanatory view of the operation of the press body of the present invention. (A): It is the elements on larger scale in the state where the preheated plate was set. (B): It is the elements on larger scale of the state where the granulated material was thrown in. (C): It is the elements on larger scale of a pressurization state.

FIG. 11 is an explanatory view of a step of releasing a preformed product of the present invention. (A): It is the elements on larger scale which show the initial motion of a knockout operation. (B): It is the elements on larger scale which show the completion of a knockout operation.

FIG. 12 is a perspective view showing an outline of a handling unit of the present invention.

FIG. 13 is a perspective view showing an outline of a second conveyor section of the present invention.

FIG. 14 is a flowchart of the present invention.

FIG. 15 is a cross-sectional view of a conventional die for preforming a heat insulating layer and a friction material into a tablet shape.

FIG. 16 is a sectional view of a conventional disc brake pad.

FIG. 17 is a press step diagram for laminating a friction material on a preformed product of a conventional example.

[Explanation of symbols]

 A: First plate charging section B: High frequency heating section C: Second plate charging section D: Press body E: Raw material tank F: Hopper charging section G: Equalizing section H: Handling section I: Second conveyor section 1: Spare Molded product 2: Plate 3: Heat insulation layer 4: Mold hole 10: First conveyor section 20: Handling section 22, 44, 54, 68, 71, 122: Cylinder 24, 55, 126: Magnet 25, 53, 73, 124 : Elevating device 32: Posture correction jig 33: Clamp cylinder 45: Heating coil 46: Atmospheric temperature detector 47: Plate temperature detector 61: Tank 62: Vibration feeder 64: Shooter 65: Load cell 66: Gate 67: Hopper 70: Bottom gate 75: comb tooth head 82: press column 88: upper cylinder head 90: lower cylinder head 94: da A 97: Die lifting cylinder 98: Upper punch 100: Insert 101: Plate guide 103: Lower punch 132: Belt conveyor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masakazu Kashise 1-1-1, Koyokita-Kita, Itami-shi, Hyogo Sumitomo Electric Industries, Ltd. Itami Works (72) Inventor Toshihiro Shinnai Kitaichi-Kunyo, Itami-shi, Hyogo Chome 1-1 Sumitomo Electric Industries, Ltd. Itami Works

Claims (5)

[Claims] An apparatus for preforming a disc brake pad having a plurality of frictional materials, comprising: a first plate input section for conveying a plate coated with an adhesive to a predetermined position; A heating section for heating to a temperature, a second plate loading section for transporting the heated plate onto the insert of the press body section, a hopper loading section for moving the weighed granulated material onto the insert, A leveling unit for leveling the granulated material inside the die, the press body for heating and molding the plate and the granulated material at a predetermined pressure, a handling unit for unloading a preformed product, and the preformed product Pre-forming apparatus for disc brake pads, which automatically operates each component constituted by a second conveyor section that moves the next step. 2. The heating unit according to claim 1, wherein the heating unit automatically measures the temperature of the plate conveyed from the first plate charging unit, and controls the heating output by comparing the temperature with a target set temperature. Pre-forming device for disc brake pads. 3. The flattening part for leveling the granulated material inside the die of the press body has a comb-shaped stirrer adapted to the shape of the preform. Pre-forming device for disc brake pads. 4. The disc brake pad preforming apparatus according to claim 1, wherein the initial position of the lower punch of the press body can be set to an arbitrary position with respect to the insert. 5. The disk brake pad preforming apparatus according to claim 1, wherein the operation timing of the upper press and the lower press of the press body can be arbitrarily set.