Multi-layer mold automatic weighing machine

Abstract

This invention discloses an automatic weighing machine for multi-layer molds, comprising: a frame, a material lifting device on the frame, a storage device on one side of the material lifting device, a discharging device on the storage device, a weighing device below the discharging device, a feeding device below the weighing device, and two or more layers of feeding devices below the feeding device. Through the discharging device, weighing device, feeding device, and two or more layers of feeding devices, under the control of a controller, it simultaneously performs material feeding operations for multi-layer molds, greatly improving feeding efficiency.

Description

Technical Field

[0001] This invention relates to an auxiliary processing device for brake pads, and more particularly to an automatic weighing machine for multi-layer molds. Background Technology

[0002] The patent "An Automatic Feeding and Weighing Machine" (Publication No.: CN211133601U), published on July 31, 2020, describes the following: an automatic weighing device, which has a weighing frame, a material box at the top of the weighing frame, a screw feeding mechanism connected to the bottom of the material box, a weighing mechanism below the discharge end of the screw feeding mechanism, and a discharge mechanism below the weighing mechanism; a feeding device, which has a feeding frame placed side by side with the weighing frame, a feeding hopper and a lifting mechanism for raising or lowering the feeding hopper are provided inside the feeding frame, a connecting rod is hinged to the lifting mechanism, the top of the connecting rod is hinged to the bottom of the feeding hopper, two side pulleys are symmetrically arranged on each side of the outer side of the feeding hopper near the material box, a side slide rail that cooperates with the side pulleys is provided on the feeding frame, and a side support slide rail with a height not lower than the material box is vertically arranged on the side of the side slide rail near the material box. However, this existing technology can only feed materials to single-layer molds and cannot feed materials to multi-layer molds, resulting in low feeding efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic material weighing machine for multi-layer molds, which solves the problem that existing technologies cannot simultaneously feed materials to multi-layer molds.

[0004] To achieve the above objectives, the technical solution adopted by the present invention includes: a frame, the frame being equipped with a material lifting device, a storage device being provided on one side of the material lifting device, a discharging device being provided on the storage device, a weighing device being provided below the discharging device, a feeding device being provided below the weighing device, and two or more feeding devices being provided below the feeding device. The feeding device includes: a feeding frame, the feeding frame being equipped with a feeding guide device and a feeding feed device, two or more feeding hoppers being provided at the front of the feeding frame, a feeding drawer plate being provided below the feeding hoppers, a feeding bottom plate being provided below the feeding drawer plate, and feeding outlets being provided on both the feeding drawer plate and the feeding bottom plate. The feeding device is staggered, with feeding trays connected to a feeding tray drive device. The feeding device includes a feeding frame, which has a feeding guide device and a feeding feed device. The front of the feeding frame has two or more feeding hoppers, and a feeding tray is located below each hopper. A feeding base plate is located below the feeding tray. Both the feeding tray and the feeding base plate have feeding outlets, which are staggered. The feeding trays are connected to a feeding tray drive device. All feeding devices are equipped with feeding lifting devices. The storage device, unloading device, weighing device, feeding feed device, feeding tray drive device, feeding feed device, and feeding tray drive device are connected to a controller.

[0005] The uppermost feeding device is equipped with a spreading device, which includes: a spreading support, a first-level telescopic device connected to the spreading support, a first-level telescopic device connected to a transition plate, a transition plate connected to a second-level telescopic device, a second-level telescopic device connected to a spreading fixing plate, and a spreading fixing plate connected to one or more rake teeth. A spreading guide device is provided between the spreading support, the transition plate, and the spreading fixing plate.

[0006] The storage device includes: a hopper, a stirring shaft inside the hopper, stirring blades connected to the stirring shaft, a stirring drive device connected to the stirring shaft, and a discharge port at the bottom of the hopper.

[0007] The feeding device includes: a discharge pipe, a spiral shaft inside the discharge pipe, a feeding inlet and a feeding outlet, the spiral shaft being connected to a feeding drive device, a feeding substrate being provided in front of the feeding outlet, the feeding substrate being parallel to the feeding outlet, a feeding drive device being connected to one side of the feeding substrate, the feeding drive device being connected to a connecting point blade on the other side of the feeding substrate, the feeding substrate being connected to a substrate telescopic drive device, and the substrate telescopic drive device being connected at the feeding outlet.

[0008] The feeding and lifting device includes: a lifting guide rail, a lifting slider connected to the lifting guide rail, a lifting slide connected to the lifting slider, a lifting screw movably connected to the lifting slide, a feeding frame connected to the lifting slide, and a lifting drive device connected to the lifting screw.

[0009] The weighing device includes a weighing sensor connected to a weighing hopper. The upper part of the weighing hopper is provided with a weighing inlet, and the lower part of the weighing hopper is provided with a weighing outlet. A weighing gate is hinged at the weighing outlet, and the weighing gate is provided with a weighing gate drive device.

[0010] The material lifting device includes: a lifting screw, which is movably connected to a lifting worm gear. The lifting worm gear is connected to a lifting drive device and is connected to a lifting base. The lifting screw passes through the lifting base plate. The top of the lifting screw is connected to a sprocket. A chain surrounds the sprocket. One end of the chain is connected to the lifting base, and the other end of the chain is connected to a climbing trolley. The climbing trolley is connected to a base rod. At least one top rod is hinged to the base rod. The top of the top rod is hinged to the bottom of the storage box. Two sets of running wheels are provided on the side of the storage box. The climbing trolley moves in the climbing track, and both sets of running wheels move in the tilting track. The tilting track includes a track with an upright branch and a horizontal branch above the upright branch.

[0011] The feeding stroke of the feeding device is greater than that of the material feeding device.

[0012] The lifting screw consists of two screws, which are connected to the same lifting drive device via a belt.

[0013] The controller controls the weighing device to sequentially pour the weighed friction material into the feeding hoppers on the feeding device. Once all the feeding hoppers are filled with friction material, the feeding device pours the friction material into the corresponding feeding hopper of the next lower feeding device. Then, the feeding device pours the friction material from its current layer into the corresponding feeding hopper of the next lower feeding device, and so on, until the bottom feeding device is filled with friction material. This process is repeated, with the weighing device weighing, the feeding device collecting and discharging, and the feeding device pouring friction material layer by layer until all feeding devices are filled with friction material. The controller controls the weighing device to... The friction material, after being weighed, is poured sequentially into the feeding hoppers on the feeding device. Once all the feeding hoppers on the feeding device are filled with friction material, the feeding device pours the friction material into the corresponding feeding hopper of the feeding device on the next lower layer. After the rake teeth of the spreading device move horizontally back and forth to spread the friction material in the feeding hopper, the feeding device pours the friction material in this layer into the corresponding feeding hopper of the feeding device on the next lower layer, until the feeding device at the bottom layer is filled with friction material. Then, the above steps are repeated: the weighing device weighs the material, the feeding device collects and centrally discharges the material, and the feeding device pours the friction material layer by layer until all the feeding devices on all layers are filled with friction material.

[0014] This invention utilizes a feeding device, a weighing device, a conveying device, and two or more layers of feeding devices. Under the control of a controller, these devices simultaneously feed multiple layers of molds, significantly improving feeding efficiency and effectively reducing the labor intensity of operators. Secondly, by incorporating a spreading device, the friction material in the feeding hopper is leveled, resulting in uniform thickness of the hot-pressed brake pads and improving their quality. Thirdly, by using point-filling blades and a feeding drive device in the feeding device to feed small quantities of material sequentially, the amount of material fed is precisely controlled, reducing weighing errors. Fourthly, by incorporating a feeding lifting device, the feeding height is increased to twice the length of the lifting screw, greatly enhancing the lifting height and allowing the storage box to tip over at the highest point of the lifting, emptying the friction material inside into the storage device. Fifth, through the scheduling of the controller, each feeding device pours friction material into the feeding device, and then feeds the multi-layer mold at the same time, which greatly simplifies the structure, facilitates control, shortens the feeding stroke, ensures the stability of the pouring, and avoids the situation of material spillage due to excessive pouring distance. Attached Figure Description

[0015] Figure 1 This is a front view of an embodiment of the present invention. Figure 2 for Figure 1 Cross-sectional view, Figure 3 This is a top view of the feeding device according to an embodiment of the present invention. Figure 4 This is a top view of the feeding device according to an embodiment of the present invention. Figure 5 This is a top view of the material spreading device according to an embodiment of the present invention. Figure 6 for Figure 5 Left view, Figure 7 This is a top view of the storage device according to an embodiment of the present invention. Figure 8 This is a front view of the feeding device according to an embodiment of the present invention. Figure 9 for Figure 8 3D image, Figure 10 This is a perspective view of the weighing device according to an embodiment of the present invention. Figure 11 for Figure 10 Top view, Figure 12 This is a partial perspective view of the material lifting device according to an embodiment of the present invention. Figure 13 This is a perspective view of the feeding lifting device according to an embodiment of the present invention. Figure 14 for Figure 13 A bottom view. Detailed Implementation

[0016] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 12 , Figure 13 and Figure 14 The embodiment of the present invention shown includes: a frame 1, a material lifting device 2, a storage device 3 on one side of the material lifting device 2, a feeding device 4 on the storage device 3, a weighing device 5 below the feeding device 4, and the weighing device 5 and the material lifting device 2 are located inside a dust cover. Below the weighing device 5 is a feeding device 6, and below the feeding device 6 are two layers of feeding devices 7. The feeding device 7 includes a feeding frame 701, which is equipped with a feeding guide device and a feeding feed device. The front of the feeding frame is equipped with six feeding hoppers 702 arranged in two rows and three columns. Below the feeding hoppers 702 is a feeding drawer plate 703, and below the feeding drawer plate 703 is a feeding base plate 704. Both the feeding drawer plate 703 and the feeding base plate 704 have feeding outlets, and the feeding outlets on the feeding drawer plate 703 and the feeding base plate 704 are staggered. The number of feeding outlets on the feeding drawer plate 703 and the feeding base plate 704 is the same as the number of feeding hoppers 702, which is also six. The feeding drawer plate 703 is connected to the feeding drawer plate drive device 705. The feeding plate drive device 705 is a cylinder. The control valve connected to the feeding plate drive device 705 is also connected to the controller. The controller controls the back-and-forth movement of the feeding plate 703. Feeding is completed when the feeding outlet on the feeding plate 703 and the feeding outlet on the feeding base plate 704 are aligned. The controller is a PLC controller. The feeding feeding device includes a feeding feed screw 706, which is connected to the feeding feed drive device 707. The feeding feed screw 707 is connected to the feeding slider fixing plate 708 through a nut. The feeding guide device includes a feeding slider 709 connected to the feeding slider fixing plate 708. The feeding slider 709 is movably connected to the feeding guide rail, which is arranged on both sides of the feeding frame 701. The feeding drive device 707 is a feeding drive motor, connected to a controller. When the feeding slider fixing plate 708 is fixed, the feeding drive device 707 drives the feeding frame 701 to move back and forth along the feeding guide rail. Each feeding device is equipped with two sets of feeding lifting devices, which are respectively connected to both sides of the feeding slider fixing plate 705. The feeding lifting device includes: a lifting guide rail 710, a lifting slider 711 connected to the lifting guide rail 710, a lifting slide 712 connected to the lifting slider 711, a lifting screw 713 movably connected to one side of the lifting slide 712, and the feeding slider fixing plate 705 connected to the other side of the lifting slide 712. The two lifting screws 713 are linked to the same lifting drive device 714 via a belt for synchronous lifting. The lifting drive device 714 is a lifting drive motor, connected to a controller.

[0018] like Figure 4The feeding device 6 shown includes: a feeding frame 601, which is equipped with a feeding guide device and a feeding feed device. The front of the feeding frame 601 is provided with six feeding hoppers 602 in two rows and three columns. Below the feeding hoppers 602 is a feeding drawer plate 603. Below the feeding drawer plate 603 is a feeding base plate 604. Both the feeding drawer plate 603 and the feeding base plate 604 have feeding outlets. The feeding outlets on the feeding drawer plate 603 and the feeding outlets on the feeding base plate 604 are staggered. The number of feeding outlets on the feeding drawer plate 603 and the feeding outlets on the feeding base plate 604 is the same as that of the feeding hoppers 602, which is also six. The feeding plate 603 is connected to the feeding plate drive device 605, which is a cylinder. The control valve connected to the feeding plate drive device 605 is also connected to the controller. The controller controls the forward and backward movement of the feeding plate 603. Feeding is completed when the feeding outlet on the feeding plate 603 is aligned with the feeding outlet on the feeding base plate 604. The feeding device includes a feeding screw 606, which is connected to the feeding drive device 607. The feeding screw 606 is connected to the feeding slider fixing plate 608 through another nut. The feeding guide device includes a feeding slider 609 connected to the feeding slider fixing plate 608. The feeding slider 609 is movably connected to the feeding guide rail, which is arranged on both sides of the feeding frame 601. The feeding drive device 607 is a feeding motor, which is connected to the controller. The feeding slider fixing plate 608 is fixedly connected to the frame 1, and the feeding drive device 607 drives the feeding frame 601 to move back and forth along the feeding guide rail. The feeding stroke of the feeding device is greater than the feeding stroke of the feeding device.

[0019] like Figure 5 and Figure 6 The uppermost feeding device 7 shown is equipped with a spreading device 8, which includes: a spreading support 801, a primary telescopic device 802 connected to the spreading support 801, a transition plate 803 connected to the primary telescopic device 802, a secondary telescopic device 804 connected to the transition plate 803, a spreading fixing plate 805 connected to the secondary telescopic device 804, and three rake teeth 806 connected to the spreading fixing plate 805. A spreading guide device 807 is provided between the spreading support 801, the transition plate 803, and the spreading fixing plate 805. The guide device 807 is a guide rod connected to the spreading fixing plate 805. The spreading support 801 and the transition plate 803 are respectively provided with limiting holes, through which the guide device 807 passes. Both the primary telescopic device 802 and the secondary telescopic device 804 are cylinders. The control valves connected to the primary telescopic device and the secondary telescopic device are both connected to the controller. The controller first controls the piston rod of the primary telescopic device 802 to extend, and then drives the piston rod of the secondary telescopic device 804 to reciprocate, thereby driving the rake teeth 806 to also reciprocate to flatten the friction material in the feeding hopper 702.

[0020] like Figure 7 , Figure 8 , Figure 9 and Figure 10The storage device 3 shown includes: a hopper 301, a stirring shaft 302 inside the hopper 301, stirring blades 303 connected to the stirring shaft 302, a stirring drive device 304 connected to the stirring shaft 302, and a discharge port at the bottom of the hopper 301. The stirring drive device 304 is a stirring drive motor, and the stirring drive device 304 is connected to a controller, which controls the stirring speed and stirring time according to the settings. A feeding device 4 is provided at the feeding port. The feeding device 4 includes: a discharge pipe 401, which is connected to the bottom of the hopper 301. A spiral shaft 402 is provided inside the discharge pipe 401. The discharge pipe 401 has a feeding inlet 403 and a feeding outlet 404. The feeding inlet 403 is connected to the feeding port of the storage device 3. The spiral shaft 402 is connected to the feeding drive device 405. A feeding base plate 406 is provided in front of the feeding outlet 404. The feeding base plate 406 is parallel to the feeding outlet 404. A feeding drive device 407 is connected to one side of the feeding base plate 406. The feeding drive device 407 is connected to the connecting point of the feeding base plate 406 on the other side by a connecting blade 408. The two ends of the feeding base plate 406 are respectively connected to a base plate telescopic drive device 409, which is connected to the feeding outlet 404. A weighing device 5 is provided below the discharge port 404. The weighing device 5 includes a weighing sensor 501 connected to a weighing base plate 505, which is connected to the frame. The weighing sensor 501 is connected to a weighing hopper 502, which is located below the discharge port. The weighing hopper 502 has a weighing inlet at its upper part and a weighing outlet at its lower part. A weighing gate 503 is hinged to the weighing outlet. The weighing gate 503 is equipped with a weighing gate drive device 504, which pushes an end plate on one side of the weighing gate 503 to flip the weighing gate up. The substrate telescopic drive device 409 is a cylinder. The extension and retraction of the piston rod of the substrate telescopic drive device 409 drives the extension and retraction of the unloading substrate 406. When the substrate telescopic drive device 409 retracts to its original position, there is still a gap between the unloading substrate 406 and the unloading outlet 404, so that the patching blades 408 can scrape the friction material discharged from the discharge pipe 401 into the weighing device 5 below. The feeding drive device 405 is a feeding drive motor, and the unloading drive device 407 is an unloading drive motor. The feeding drive device 405 and the unloading drive device 407 are also connected to the controller. The gate drive device 504 is a cylinder. The control valve connected to the gate drive device and the control valve connected to the substrate telescopic drive device are also connected to the controller. During weighing, the controller controls the substrate telescopic drive device 409 to extend and starts the feeding drive device 405 to deliver friction material into the weighing hopper 502.When the weighing sensor 501 detects that the weight of the weighing hopper 502 has reached a preset fixed proportion (i.e., when the weighing amount in the hopper is about to meet the required weight), the substrate telescopic drive device 409 retracts. Simultaneously, the feeding drive device 407 is activated, driving the point-filling blades 408 to rotate, and the feeding drive device 405 reduces the rotation speed to decrease the discharge amount. The rotating point-filling blades 408 gradually scrape small amounts of friction material discharged from the discharge pipe 401 into the weighing hopper 502 until the preset value is reached. This method improves the feeding speed while ensuring the final feeding accuracy.

[0021] like Figure 11 The material lifting device 2 shown includes: a lifting screw 201, which is movably connected to a lifting worm gear 202. The lifting worm gear 202 is connected to a lifting drive device 203 and is connected to a lifting base 204. The lifting screw 201 passes through the lifting base 204. The top end of the lifting screw 201 is connected to a sprocket 205. A chain 206 surrounds the sprocket 205. One end of the chain 205 is connected to the lifting base 204, and the other end of the chain 206 is connected to a climbing trolley. The climbing trolley is connected to a base rod. At least one top rod is hinged to the base rod. The top of the top rod is hinged to the bottom of the storage box. The storage box has a side panel... Two sets of running wheels are used. The climbing trolley moves in the climbing track, while the running wheels move in the tilting track. The climbing track and the tilting track are at a 90-degree angle. The tilting track includes an upright branch with a horizontal branch above it. Both sets of running wheels are located within the tilting track. During the lifting process, the climbing trolley moves upward with the chain, pushing against the storage box. When the storage box reaches the top of the tilting track, the upper set of running wheels on the storage box, hinged to the top of the push rod, enters the horizontal branch, while the lower set of running wheels continues to slide in the upright branch. This causes the push rod to tilt, tipping the storage box and causing the friction material it contains to fall into the hopper. The lifting drive device 203 is a lifting drive motor connected to a controller. The lifting drive motor is activated as needed or based on calculations to lift the friction material from the storage box into the hopper.

[0022] The working steps of this invention are as follows: The controller controls the weighing device to pour the weighed friction material into the feeding hopper on the feeding device in sequence. When all the feeding hoppers on the feeding device are filled with friction material, the feeding device pours the friction material into the feeding hopper corresponding to the feeding device in the lower layer of the feeding device. After the rake teeth of the spreading device move horizontally back and forth to spread the friction material in the feeding hopper, the feeding device pours the friction material in this layer into the feeding hopper corresponding to the feeding device in the next layer of the feeding device, until the feeding device at the bottom layer is filled with friction material. Then, the above steps are repeated: the weighing device weighs the material, the feeding device collects and centrally discharges the material, and the feeding device pours the friction material layer by layer until all the feeding devices in all layers are filled with friction material.

[0023] As an improvement to the present invention, the material spreading device can also be eliminated. The working steps are as follows: The controller controls the weighing device to pour the weighed friction material into the feeding hopper on the feeding device in sequence. When all the feeding hoppers on the feeding device are filled with friction material, the feeding device pours the friction material into the feeding hopper corresponding to the feeding device in the next layer of the feeding device. Then the feeding device pours the friction material in this layer into the feeding hopper corresponding to the feeding device in the next layer of the feeding device, until the feeding device at the bottom layer is filled with friction material. Then the above steps are repeated: the weighing device weighs the material, the feeding device collects and centrally discharges the material, and the feeding device pours the friction material down layer by layer until all the feeding devices in all layers are filled with friction material.

[0024] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, all technical solutions that are the same as or similar to these embodiments fall within the protection scope of the present invention.

Claims

1. An automatic material weighing machine for multi-layer molds, comprising: The machine frame is equipped with a material lifting device. A storage device is located on one side of the material lifting device, and a discharge device is located on the storage device. A weighing device is located below the discharge device. The machine is characterized in that: a feeding device is located below the weighing device, and a feeding device with two or more layers below the feeding device is provided. Each feeding device includes: a feeding frame, a feeding guide device, and a feeding feed device. Two or more feeding hoppers are located at the front of the feeding frame. A feeding drawer is located below the feeding hoppers, and a feeding bottom plate is located below the feeding drawer. Both the feeding drawer and the feeding bottom plate have feeding outlets. The feeding outlets on the feed plate and the feed base plate are staggered, and the feed plate is connected to a feed plate drive device. The feeding device includes: a feeding frame, which is equipped with a feeding guide device and a feeding feed device. The front of the feeding frame has two or more feeding hoppers. Below the feeding hoppers is a feed plate, and below the feed plate is a feed base plate. Both the feed plate and the feed base plate have feeding outlets, and the feeding outlets on the feed plate and the feed base plate are staggered. The feed plate is connected to a feed plate drive device. All feeding devices are equipped with feeding lifts. The weighing device includes: a weighing sensor connected to a weighing hopper; a weighing inlet at the top of the hopper and a weighing outlet at the bottom; a weighing gate hinged at the outlet; and a gate drive device. The unloading device includes: a horizontally positioned discharge pipe with a screw shaft inside; a discharge inlet and a discharge outlet; a screw shaft connected to a feeding drive device; a discharge plate parallel to the discharge outlet; a discharge drive device connected to one side of the discharge plate; and the discharge drive device connected to the discharge plate. The connecting point is a blade, located at the discharge port; the storage device, discharge device, weighing device, feeding device, feeding plate drive device, feeding feed device, and feeding plate drive device are connected to the controller; when the weighing sensor detects that the weight of the weighing hopper reaches a preset value, the base plate telescopic drive device retracts and simultaneously starts the discharge drive device to drive the point blade to rotate, the feeding drive device reduces the rotation speed of the screw shaft, and the rotating point blade scrapes the friction material discharged from the discharge pipe into the weighing hopper one by one until the preset value is reached.

2. The automatic weighing machine for multi-layer molds according to claim 1, characterized in that: The material feeding device with two or more layers is provided above the uppermost material feeding device. The material spreading device includes: a material spreading bracket, a material spreading bracket connected to a primary telescopic device, a primary telescopic device connected to a transition plate, a transition plate connected to a secondary telescopic device, a secondary telescopic device connected to a material spreading fixing plate, and a material spreading fixing plate connected to one or more rake teeth. A material spreading guide device is provided between the material spreading bracket, the transition plate, and the material spreading fixing plate.

3. The automatic weighing machine for multi-layer molds according to claim 1, characterized in that: The storage device includes: a hopper, a horizontally arranged stirring shaft inside the hopper, stirring blades connected to the stirring shaft, a stirring drive device connected to the stirring shaft, and a discharge port at the bottom of the hopper.

4. The automatic weighing machine for multi-layer molds according to claim 1, characterized in that: The feeding and lifting device includes: a lifting guide rail, a lifting slider connected to the lifting guide rail, a lifting slide connected to the lifting slider, a lifting screw movably connected to the lifting slide, a feeding frame connected to the lifting slide, and a lifting drive device connected to the lifting screw.

5. The automatic weighing machine for multi-layer molds according to claim 1, characterized in that: The material lifting device includes: a lifting screw, which is movably connected to a lifting worm gear. The lifting worm gear is connected to a lifting drive device and is connected to a lifting base. The lifting screw passes through the lifting base plate. A sprocket is connected to the top of the lifting screw. A chain surrounds the sprocket. One end of the chain is connected to the lifting base, and the other end of the chain is connected to a climbing trolley. The climbing trolley is connected to a bottom rod. At least one top rod is hinged to the bottom of the storage box. Two sets of running wheels are provided on the side of the storage box. The climbing trolley moves in the climbing track, and the running wheels move in the tilting track. A horizontal branch track is provided on the upper part of the tilting track.

6. The automatic weighing machine for multi-layer molds according to claim 1, characterized in that: The feeding stroke of the feeding device is greater than that of the material feeding device.

7. The automatic weighing machine for multi-layer molds according to claim 4, characterized in that: The lifting screw consists of two screws, which are connected to the same lifting drive device via a belt.

8. The automatic weighing machine for multi-layer molds according to claim 1 or 2, characterized in that: The controller controls the weighing device to sequentially pour the weighed friction material into the feeding hoppers on the feeding device. Once all the feeding hoppers are filled with friction material, the feeding device pours the friction material into the corresponding feeding hopper of the next lower feeding device. Then, the feeding device pours the friction material from its current layer into the corresponding feeding hopper of the next lower feeding device, and so on, until the bottom feeding device is filled with friction material. This process is repeated, involving the weighing device, the feeding device collecting and discharging the material, and the feeding device pouring the friction material layer by layer until all feeding devices are filled with friction material. The controller controls the weighing device to weigh... The friction material is then poured sequentially into the feeding hoppers on the feeding device. Once all the feeding hoppers on the feeding device are filled with friction material, the feeding device pours the friction material into the corresponding feeding hopper of the feeding device on the next lower layer. After the rake teeth of the spreading device move horizontally back and forth to spread the friction material in the feeding hopper, the feeding device pours the friction material in this layer into the corresponding feeding hopper of the feeding device on the next lower layer, until the feeding devices at the bottom layer are filled with friction material. Then, the steps of weighing material with the weighing device, collecting and discharging material with the feeding device, and pouring friction material layer by layer with the feeding device are repeated until all the feeding devices at all layers are filled with friction material.

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