Automatic sprue grinding equipment for casting

Abstract

The automatic casting sprue grinding equipment comprises four linear sliding table modules, the first linear sliding table module is fixed to a material containing table through a supporting frame, and the end of the second linear sliding table module is horizontally arranged on a sliding plate of the first linear sliding table module; the third linear sliding table module is vertically arranged on a sliding plate of the second linear sliding table module, a clamping assembly is arranged at the bottom of a sliding plate of the third linear sliding table module, the six-axis mechanical arm is arranged to move back and forth between the fourth linear sliding table module and the belt sander, and a material inclined groove is formed in the front side of the belt sander. The mode that the linear sliding table module is combined with the clamping assembly is adopted for clamping and transporting, the product remodeling adjusting mode can be simplified, the product clamping path of a six-axis mechanical arm can be shortened, and therefore the production efficiency is improved, meanwhile, the mode that machined products are collected through a material groove is adopted, and the production efficiency is improved. And the product placing mode of the six-axis manipulator can be simplified, the production takt can be accelerated, and the fault alarm rate during placing can be reduced.

Description

Technical Field

[0001] This invention relates to the field of industrial automation and intelligent manufacturing technology, specifically to an automatic grinding equipment for casting gates. Background Technology

[0002] Castings are metal shaped objects obtained by various casting methods. They are objects with a certain shape, size and properties obtained by pouring, injecting, sucking or other casting methods into a pre-prepared mold after smelting liquid metal, cooling and then grinding.

[0003] In existing technologies, gate grinding equipment only uses a six-axis robot to grind the gate. When the six-axis robot is picking up and placing products, alarms are frequently triggered because the products are not successfully picked up or placed. Moreover, in order to ensure personnel safety, the material table is too far away from the six-axis robot, making it impossible to improve product processing efficiency by increasing the production cycle or by adjusting the operating speed of the six-axis robot. In addition, the product changeover time and product picking and placing time of the gate grinding equipment are long. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing an automatic casting gate grinding device.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: An automatic gating device for castings, comprising: A material placement platform, wherein a number of product tooling positioning bases are arranged horizontally side by side on the top of the material placement platform; A linear slide module support frame, wherein there are two linear slide module support frames, which are symmetrically arranged on both sides of the top of the material placement platform; The first linear slide module is horizontally disposed between the tops of the two linear slide module support frames. The second linear slide module has one end vertically mounted on the first linear slide module, and the end of the second linear slide module is laterally slidably connected to the first linear slide module. The third linear slide module is vertically disposed on the front side of the second linear slide module, and the third linear slide module is laterally slidably connected to the front side of the second linear slide module. A gripping assembly is longitudinally slidably connected to the front side of the third linear slide module; The fourth linear slide module is connected to the top of the material placement platform away from the linear slide module support frame via a support plate. The belt sander is located in front of the material placement platform, and the belt sander and the fourth linear slide module are located on the same side of the material placement platform. A six-axis robot, wherein the six-axis manipulator of the six-axis robot is set to move back and forth between the end of the fourth linear slide module away from the material placement table and the feed port of the belt sander; The material chute is located between the material placement platform and the belt sander, with the higher end of the material chute located below the discharge port of the belt sander. The control component has its output terminals electrically connected to the input terminals of the first linear slide module, the second linear slide module, the third linear slide module, the fourth linear slide module, the gripping component, the belt sander, and the six-axis robot.

[0006] Furthermore, the first linear slide module includes a first base, a first slide rail disposed on the front side of the first base, and a first slide plate slidably connected to the first slide rail. The first slide plate is connected to the right-angle side of the triangular support frame. One end of the first base is provided with a first servo motor that drives the first slide plate to move. The input end of the first servo motor is electrically connected to the control component.

[0007] Furthermore, the second linear slide module includes a second base mounted on the other right-angled side of the triangular support frame, a second slide rail located on the front side of the second base, and a second slide plate slidably connected to the second slide rail. One end of the second base is provided with a second servo motor that drives the second slide plate to move, and the input end of the second servo motor is electrically connected to the control component.

[0008] Furthermore, the third linear slide module includes a mounting plate vertically connected to the middle of the front side of the second slide plate, a third base horizontally mounted on the mounting plate, a third slide rail mounted on the front side of the third base, a third slide plate slidably connected to the third slide rail, the bottom of the third slide plate connected to the clamping assembly, and a third servo motor for driving the third slide plate to move at one end of the third base. The input end of the third servo motor is electrically connected to the control assembly.

[0009] Furthermore, the gripping assembly includes a finger cylinder, a rotary cylinder, and a clamp. The rotary cylinder is rotatably connected to the bottom of the third slide plate and is connected to the finger cylinder via a connecting plate. The clamp is connected to the end of the finger cylinder via screws. The input ends of both the finger cylinder and the rotary cylinder are electrically connected to the control assembly.

[0010] Furthermore, the fourth linear slide module includes a fourth base disposed on the surface of the support plate, a fourth slide rail disposed on the front top of the fourth base, and a fourth slide plate slidably connected to the fourth slide rail. The fourth slide plate is provided with a positioning groove plate for placing products. One end of the fourth base is provided with a fourth servo motor for driving the fourth slide plate to move. The input end of the fourth servo motor is electrically connected to the control component.

[0011] Furthermore, the fourth linear slide module is positioned parallel to the second linear slide module.

[0012] Furthermore, the top of the first base is provided with a first cable chain, the moving end of which is connected to the first slide plate via an L-shaped plate; the top of the second base is provided with a second cable chain, the moving end of which is connected to the mounting plate via a first connecting plate; and the side of the third base is provided with a third cable chain, the moving end of which is connected to the clamping assembly via a first connecting plate.

[0013] Furthermore, the material chute is supported by a bracket, and the lower end of the material chute is positioned directly above the opening of the material aluminum frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention uses four linear slide modules combined with a gripping component. Specifically, the first servo motor drives the first slide plate to slide on the first slide rail, causing the second base to move relative to the first base. At the same time, the second servo motor drives the second slide plate to slide on the second slide rail, causing the third base to move relative to the second base. This positions the gripping component relative to the product fixture positioning base on the material placement table, allowing the gripping component to move directly above any product within the product fixture positioning base, thereby achieving product positioning and gripping. Then, the second servo motor drives the second slide plate to move the third base relative to the second base to one end away from the first base. Finally, the first servo motor drives the first slide plate to move the second base along with the product fixture positioning base to the other end. The third base moves relative to the first base until it is directly above the fourth base. The third servo motor drives the third slide plate, which in turn moves the gripping component and the gripped product vertically downward relative to the third base. At the same time, the fourth servo motor drives the fourth slide plate to slide on the fourth slide rail, which in turn moves the positioning slot plate until it slides directly below the gripping component. The product descends until it enters the positioning slot of the positioning slot plate. The fourth servo motor drives the positioning slot plate, along with the product, to move to one end closer to the six-axis robot, thus realizing the transport of the product. This method of gripping and transporting using a linear slide module not only simplifies the machine setup for product changeovers but also shortens the path for the six-axis robot to grip the product, thereby improving production efficiency.

[0015] (2) The present invention sets the higher end of the material chute below the outlet of the belt sander and the lower end above the opening of the aluminum frame of the material, so that the product can be collected by the aluminum frame of the material after passing through the sander's gate. It also allows the six-axis robot to collect the product into the aluminum frame of the material even if it fails to pick up and place the product into the sander. This method of collecting the processed product by the material chute not only simplifies the way the six-axis robot places the product, but also speeds up the production cycle and reduces the failure alarm rate during placement. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of this embodiment.

[0018] Figure 2 for Figure 1 Top view.

[0019] Figure 3 This is one of the schematic diagrams of the material placement platform structure in this embodiment.

[0020] Figure 4 This is the second schematic diagram of the material placement platform structure in this embodiment.

[0021] Figure 5 This is a schematic diagram of the clamping component structure in this embodiment.

[0022] Figure 6 This is a schematic diagram of the material chute structure in this embodiment.

[0023] Figure 7 This describes the control principle of the control component in this embodiment.

[0024] In the diagram: Material placement platform 1, first linear slide module 2, first base 201, first slide rail 202, first slide plate 203, first servo motor 204, second linear slide module 3, second base 301, second slide rail 302, second slide plate 303, second servo motor 304, third linear slide module 4, mounting plate 401, third base 402, third slide rail 403, third slide plate 404, third servo motor 405, fourth linear slide module 5, fourth base 501. Fourth slide rail 502, fourth slide plate 503, positioning groove plate 504, fourth servo motor 505, gripping assembly 6, finger cylinder 601, rotary cylinder 602, fixture 603, belt sander 7, six-axis robot 8, six-axis manipulator 801, material chute 9, bracket 901, control assembly 10, linear slide module support frame 11, product tooling positioning base 12, triangular support frame 13, support plate 14, first drag chain 15, second drag chain 16, third drag chain 17, material aluminum frame 18. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, but this does not constitute a limitation on the scope of protection of the present invention.

[0026] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1 In this observation, the left side of the observer is designated as front, the right side as rear, the front of the observer as right, the rear of the observer as left, the top of the observer as up, and the bottom of the observer as down. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the invention and do not indicate or imply that the structures or components referred to must have a specific orientation or be constructed in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0027] like Figures 1-7As shown, this embodiment provides an automatic casting gate grinding device, including a material placement platform 1, two linear slide module support frames 11, a first linear slide module 2, a second linear slide module 3, a third linear slide module 4, a clamping assembly 6, a fourth linear slide module 5, a belt sander 7, a six-axis robot 8, a material chute 9, and a control assembly 10. Two product tooling positioning bases 12 are horizontally arranged side-by-side on the top of the material placement platform 1; the two linear slide module support frames 11 are symmetrically arranged on both sides of the top of the material placement platform 1; the first linear slide module 2 is horizontally arranged on the top of the two linear slide module support frames 11. In this configuration, one end of the second linear slide module 3 is vertically mounted on the first linear slide module 2, and this end is laterally slidably connected to it. The third linear slide module 4 is vertically mounted on the front side of the second linear slide module 3, and the third linear slide module 4 is laterally slidably connected to it. The clamping component 6 is longitudinally slidably connected to the front side of the third linear slide module 4, allowing the clamping component 6 to move longitudinally and laterally within the horizontal plane formed by the first linear slide module 2 and the second linear slide module 3, and also to move vertically perpendicular to this horizontal plane. The three linear slide modules... The first linear slide module 5 serves to transport products on the material placement platform 1. The fourth linear slide module 5 is connected to the top of the material placement platform 1, away from the linear slide module support frame 11, via a support plate 14. One end of the fourth linear slide module 5 is close to the feed inlet of the belt sander 7. The fourth linear slide module 5 is positioned parallel to the second linear slide module 3. The belt sander 7 is positioned in front of the material placement platform 1, and both the belt sander 7 and the fourth linear slide module 5 are located on the same side of the material placement platform 1. The six-axis manipulator 801 of the six-axis robot 8 moves back and forth between the end of the fourth linear slide module 5 away from the material placement platform 1 and the feed inlet of the belt sander 7. The platform module 5 serves to unload products from the material placement platform 1, and the six-axis robot 801 acts as a bridge between the material placement platform 1 and the belt sander 7 to transport products. The material chute 9 is located between the material placement platform 1 and the belt sander 7, with the higher end of the material chute 9 positioned below the discharge port of the belt sander 7. The material chute 9 serves to discharge products processed by the belt sander 7. The output end of the control component 10 is electrically connected to the input ends of the first linear slide module 2, the second linear slide module 3, the third linear slide module 4, the fourth linear slide module 5, the gripping component 6, the belt sander 7, and the six-axis robot 801.

[0028] In this embodiment, as Figure 3 and Figure 4As shown, the first linear slide module 2 includes a first base 201, a first slide rail 202 disposed on the front side of the first base 201, and a first slide plate 203 slidably connected to the first slide rail 202. The first slide plate 203 is connected to the right-angle side of the triangular support frame 13. One end of the first base 201 is provided with a first servo motor 204 that drives the first slide plate 203 to move. The input end of the first servo motor 204 is electrically connected to the control component 10.

[0029] In this embodiment, as Figure 3 and Figure 4 As shown, the second linear slide module 3 includes a second base 301 mounted on the other right-angled side of the triangular support frame 13, a second slide rail 302 provided on the front side of the second base 301, and a second slide plate 303 slidably connected to the second slide rail 302. One end of the second base 301 is provided with a second servo motor 304 that drives the second slide plate 303 to move. The input end of the second servo motor 304 is electrically connected to the control component 10.

[0030] In this embodiment, as Figure 3 and Figure 4 As shown, the third linear slide module 4 includes a mounting plate 401 vertically connected to the middle of the front side of the second slide plate 303, a third base 402 horizontally mounted on the mounting plate 401, a third slide rail 403 mounted on the front side of the third base 402, a third slide plate 404 slidably connected to the third slide rail 403, the bottom of the third slide plate 404 connected to the clamping assembly 6, and a third servo motor 405 for driving the third slide plate 404 to move at one end of the third base 402. The input end of the third servo motor 405 is electrically connected to the control assembly 10.

[0031] Specifically, the first servo motor 204 drives the first slide plate 203 to slide on the first slide rail 202, causing the second base 301 to move relative to the first base 201. At the same time, the second servo motor 304 drives the second slide plate 303 to slide on the second slide rail 302, causing the third base 402 to move relative to the second base 301. This allows the gripping component 6 to move vertically and horizontally on the horizontal plane formed by the first linear slide module 2 and the second linear slide module 3, as well as vertically perpendicular to the horizontal plane. This allows the product to be positioned and gripped on the product tooling positioning base 12, and the product can also be transported to the fourth linear slide module 5 through the three linear slide modules.

[0032] In this embodiment, as Figure 5As shown, the gripping assembly 6 includes a finger cylinder 601, a rotary cylinder 602, and a clamp 603. The rotary cylinder 602 is rotatably connected to the bottom of the third slide plate 404. The rotary cylinder 602 is connected to the finger cylinder 601 through a connecting plate. The clamp 603 is connected to the end of the finger cylinder 601 by screws. The input ends of both the finger cylinder 601 and the rotary cylinder 602 are electrically connected to the control assembly 10.

[0033] Specifically, when gripping the product, the gripping direction of the two clamps 603 is adjusted by the rotary cylinder 602 according to the product position, and then the two clamps 603 are driven by the finger cylinder 601 to grip the product.

[0034] In this embodiment, as Figure 3 and Figure 4 As shown, the fourth linear slide module 5 includes a fourth base 501 disposed on the surface of the support plate 14, a fourth slide rail 502 disposed on the top front of the fourth base 501, and a fourth slide plate 503 slidably connected to the fourth slide rail 502. The fourth slide plate 503 is provided with a positioning groove plate 504 for placing products. One end of the fourth base 501 is provided with a fourth servo motor 505 for driving the fourth slide plate 503 to move. The input end of the fourth servo motor 505 is electrically connected to the control component 10.

[0035] Specifically, the clamping component 6 moves above the fourth linear slide module 5 under the action of the three linear slide modules, and the product clamped by the clamping component 6 is placed on the slot of the positioning slot plate 504. The positioning slot plate 504 moves towards the sander 7 under the fourth servo drive.

[0036] In this embodiment, as Figures 1-5 As shown, the top of the first base 201 is provided with a first drag chain 15, and the moving end of the first drag chain 15 is connected to the first slide plate 203 through an L-shaped plate. The top of the second base 301 is provided with a second drag chain 16, and the moving end of the second drag chain 16 is connected to the mounting plate 401 through a first connecting plate. The side of the third base 402 is provided with a third drag chain 17, and the moving end of the third drag chain 17 is connected to the clamping assembly 6 through a first connecting plate.

[0037] Specifically, the cable chains are designed to protect the wiring of the servo motors and the air hoses of the rotary cylinder 602 and finger cylinder 601 from damage during movement, while also maintaining the cleanliness and orderly operation of the equipment. In this embodiment, as Figure 6 As shown, the material chute 9 is supported by the bracket 901, and the lower end of the material chute 9 is located directly above the opening of the material aluminum frame 18.

[0038] Specifically, the product processed by the belt sander 7 exits from the outlet of the belt sander 7 and falls to the higher end of the material chute 9, then slides along the material chute 9 to the lower end, and finally falls into the material aluminum frame 18 under the action of gravity inertia.

[0039] The working principle of this embodiment is as follows: In use, the control component 10 controls the first servo motor 204 to drive the first slide plate 203 to slide on the first slide rail 202, thereby causing the second base 301 to move relative to the first base 201. At the same time, the control component 10 controls the second servo motor 304 to drive the second slide plate 303 to slide on the second slide rail 302, thereby causing the third base 402 to move relative to the second base 301. This positions the gripping component 6 relative to the product tooling positioning base 12 on the material placement table 1, allowing the gripping component 6 to move to the product tooling positioning base 12 directly above the product to be processed. The control component 10 controls the third servo motor 204 to move to the product tooling positioning base 12. 5. Drive the third slide plate 404 to slide on the third slide rail 403, causing the gripping component 6 to move downward relative to the third base 402. At the same time, control the rotary cylinder 602 to adjust the gripping direction of the two clamps 603 according to the position of the product to be processed in the product tooling positioning base 12. When the gripping component 6 falls on the product, control the finger cylinder 601 to grip the product, control the third servo motor 405 to drive the gripping component 6 to move upward relative to the third base 402, thereby realizing the positioning and gripping of the product. Then control the second servo motor 304 to drive the second slide plate 303 to move the third base 402 relative to the second base 302. 1. Move to the end away from the first base 201, and then drive the first slide plate 203 through the first servo motor 204 to move the second base 301 and the third base 402 relative to the first base 201 until they move directly above the fourth base 501. Then drive the third slide plate 404 through the third servo motor 405 to move the gripping component 6 and the gripped product vertically downward relative to the third base 402. At the same time, drive the fourth slide plate 503 through the fourth servo motor 505 to slide on the fourth slide rail 502, causing the positioning slot plate 504 to slide until it slides directly below the gripping component 6, and the product descends until it enters the gripping slot. Inside the positioning slot of the positioning slot plate 504, the fourth servo motor 505 drives the positioning slot plate 504, together with the product, to move to one end closer to the six-axis robot 8, thereby realizing the transportation of the product on the material placement table 1, so that the product to be processed is conveyed towards the sander 7. Then, the six-axis manipulator 801 of the six-axis robot 8 controls the six-axis manipulator to move the product to be processed on the positioning slot plate 504 to the feed port of the sander 7. After being processed by the sander 7, the product comes out from the discharge port of the sander 7 and falls to the higher end of the material chute 9, then slides along the material chute 9 to the lower end, and finally falls into the material aluminum frame 18 under the action of gravity inertia.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic gating device for castings, characterized in that, include: Material placement platform (1), the top of which is arranged horizontally with several product tooling positioning bases (12); Linear slide module support frame (11), there are two linear slide module support frames (11), and the two linear slide module support frames (11) are symmetrically arranged on both sides of the top of the material placement platform (1); The first linear slide module (2) is horizontally arranged between the tops of the two linear slide module support frames (11); The second linear slide module (3) has one end vertically mounted on the second linear slide module (3) and the end of the second linear slide module (3) is laterally slidably connected to the first linear slide module (2); The third linear slide module (4) is vertically arranged on the front side of the second linear slide module (3), and the third linear slide module (4) is laterally slidably connected to the front side of the second linear slide module (3). The clamping component (6) is longitudinally slidably connected to the front side of the third linear slide module (4); The fourth linear slide module (5) is connected to the top of the material placement platform (1) away from the linear slide module support frame (11) via a support plate (14); The belt sander (7) is located in front of the material placement platform (1), and the belt sander (7) and the fourth linear slide module (5) are located on the same side of the material placement platform (1). A six-axis robot (8) is provided, wherein the six-axis manipulator (801) of the six-axis robot (8) moves back and forth between the end of the fourth linear slide module (5) away from the material placement table (1) and the feed inlet of the belt sander (7); Material chute (9), the material chute (9) is set between the material placement platform (1) and the belt sander (7), and the higher end of the material chute (9) is set below the discharge port of the belt sander (7); The output of the control component (10) is electrically connected to the input of the first linear slide module (2), the second linear slide module (3), the third linear slide module (4), the fourth linear slide module (5), the gripping component (6), the belt sander (7), and the six-axis robot (801).

2. The automatic gating equipment for castings according to claim 1, characterized in that, The first linear slide module (2) includes a first base (201), a first slide rail (202) provided on the front side of the first base (201) and a first slide plate (203) slidably connected to the first slide rail (202). The first slide plate (203) is connected to the right-angle side of the triangular support frame (13). One end of the first base (201) is provided with a first servo motor (204) that drives the first slide plate (203) to move. The input end of the first servo motor (204) is electrically connected to the control component (10).

3. The automatic gating equipment for castings according to claim 2, characterized in that, The second linear slide module (3) includes a second base (301) mounted on the other right-angle side of the triangular support frame (13), a second slide rail (302) provided on the front side of the second base (301), and a second slide plate (303) slidably connected to the second slide rail (302). One end of the second base (301) is provided with a second servo motor (304) that drives the second slide plate (303) to move. The input end of the second servo motor (304) is electrically connected to the control component (10).

4. The automatic gating equipment for castings according to claim 3, characterized in that, The third linear slide module (4) includes a mounting plate (401) vertically connected to the middle of the front side of the second slide plate (303), a third base (402) horizontally mounted on the mounting plate (401), a third slide rail (403) mounted on the front side of the third base (402), a third slide plate (404) slidably connected to the third slide rail (403), the bottom of the third slide plate (404) connected to the clamping assembly (6), and a third servo motor (405) for driving the third slide plate (404) to move is provided at one end of the third base (402), and the input end of the third servo motor (405) is electrically connected to the control assembly (10).

5. The automatic gating equipment for castings according to claim 4, characterized in that, The gripping assembly (6) includes a finger cylinder (601), a rotary cylinder (602), and a clamp (603). The rotary cylinder (602) is rotatably connected to the bottom of the third slide plate (404). The rotary cylinder (602) is connected to the finger cylinder (601) through a connecting plate. The clamp (603) is connected to the end of the finger cylinder (601) by screws. The input ends of the finger cylinder (601) and the rotary cylinder (602) are electrically connected to the control assembly (10).

6. The automatic gating equipment for castings according to claim 1, characterized in that, The fourth linear slide module (5) includes a fourth base (501) disposed on the surface of the support plate (14), a fourth slide rail (502) disposed on the front top of the fourth base (501), and a fourth slide plate (503) slidably connected to the fourth slide rail (502). The fourth slide plate (503) is provided with a positioning slot plate (504) for placing products. One end of the fourth base (501) is provided with a fourth servo motor (505) for driving the fourth slide plate (503) to move. The input end of the fourth servo motor (505) is electrically connected to the control component (10).

7. The automatic gating equipment for castings according to claim 1, characterized in that, The fourth linear slide module (5) is set in a direction parallel to the second linear slide module (3).

8. The automatic gating equipment for castings according to claim 4, characterized in that, The first base (201) is provided with a first drag chain (15) on its top. The moving end of the first drag chain (15) is connected to the first slide plate (203) through an L-shaped plate. The second base (301) is provided with a second drag chain (16) on its top. The moving end of the second drag chain (16) is connected to the mounting plate (401) through a first connecting plate. The third base (402) is provided with a third drag chain (17) on its side. The moving end of the third drag chain (17) is connected to the clamping assembly (6) through a first connecting plate.

9. The automatic gating equipment for castings according to claim 1, characterized in that, The material chute (9) is supported by a bracket (901), and the lower end of the material chute (9) is positioned directly above the opening of the material aluminum frame (18).

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