A feeding device for an automatic molding machine

Abstract

This utility model relates to the field of mechanical processing equipment technology, specifically to a feeding device for an automatic molding machine, including a feeding inlet, a conveyor belt, and a molding sand box. The feeding inlet is connected to the main body of the automatic molding machine, and a slot is provided on the side of the feeding inlet, in which a screen is installed. One end of the conveyor belt is located above the feeding inlet, and the other end is connected to the molding sand box. The slot is inclined forward from top to bottom, and a collection port corresponding to the lower side of the slot is opened on the front side wall of the feeding inlet. The slot penetrates through the feeding inlet, and an inlet end and a limiting end are formed on the left and right side walls of the feeding inlet, respectively. The width of the inlet end is greater than the thickness of the screen, and the width of the limiting end matches the thickness of the screen. Limiting protrusions are provided on both side walls of the limiting end, and limiting grooves that cooperate with the limiting protrusions are provided on both sides of the first end of the screen on the corresponding positions of the limiting protrusions. A stop bar is provided at the second end of the screen to match the width of the inlet end. This utility model can solve the problem of unstable screening effect caused by screen displacement under vibration environment.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing equipment technology, specifically to a feeding device for an automatic molding machine. Background Technology

[0002] Automatic molding machines are key equipment in the foundry industry for manufacturing sand molds. During operation, molding sand is transported into the molding machine via a feeding device. To ensure the quality of the molding sand, existing technologies often install a screen at the feed inlet of the feeding device to filter out large particles of impurities. For example, patent CN201921428501.4 discloses an "automatic feeding device for an automatic molding machine," which uses a structure with an inclined slot on the side of the feed inlet to install the screen. A baffle is installed on the higher side of the screen, and one end of the slot is wider than the screen thickness, while the other end is equal to the screen width, to achieve screen installation and positioning.

[0003] However, the automatic molding machine generates continuous vibration during operation, which is accompanied by actions such as compaction and pressing. The gap between the lower side of the slot and the screen (greater than the thickness of the screen) in the aforementioned patent can easily cause the screen to loosen and shift during vibration, or even fall off. The baffle bar on the higher side of the slot alone cannot effectively counteract the vibration, which may cause the screen to tilt or shift, resulting in large particles of impurities not being fully intercepted and entering the molding machine, affecting the quality of molding sand and the casting effect.

[0004] Therefore, there is an urgent need for an automatic molding machine feeding device with higher screen fixing reliability to solve the problem of unstable screening effect caused by screen displacement under vibration environment. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a feeding device for an automatic molding machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A feeding device for an automatic molding machine includes a feed inlet, a conveyor belt, and a molding sand box. The feed inlet is connected to the main body of the automatic molding machine, and a slot is provided on the side of the feed inlet, in which a screen is installed. One end of the conveyor belt is located above the feed inlet, and the other end is connected to the molding sand box. The slot is inclined forward from top to bottom, and a collection port corresponding to the lower side of the slot is opened on the front side wall of the feed inlet. The slot penetrates through the feed inlet, and an inlet end and a limiting end are formed on the left and right side walls of the feed inlet, respectively. The width of the inlet end is greater than the thickness of the screen, and the width of the limiting end matches the thickness of the screen. Limiting protrusions are provided on the two side walls of the limiting end, and limiting grooves that cooperate with the limiting protrusions are provided on both sides of the first end of the screen on the corresponding positions of the limiting protrusions. A stop bar is provided on the second end of the screen to match the width of the inlet end.

[0008] As a further improvement of this utility model, the bottom of the card slot is provided with guide strips on both sides, connecting the inlet end and the limiting end.

[0009] As a further improvement of this utility model, a collection box for collecting large particulate impurities is provided on one side outside the feed inlet below the collection port.

[0010] As a further improvement of this utility model, the limiting protrusion is made of rubber and can be elastically engaged in the limiting groove.

[0011] As a further improvement of this utility model, a pull ring is provided on the outer side of the second end of the screen.

[0012] As a further embodiment of this utility model: wherein the two ends of the baffle are flush with the two sides of the screen, and the upper surface of the baffle is in contact with the top wall of the inlet end.

[0013] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0014] The slot is tilted forward from top to bottom and matches the collection port to ensure that large particles of impurities slide down the inclined surface of the screen to the collection port, achieving efficient collection. The width of the slot inlet end is greater than the thickness of the screen, which facilitates the insertion and installation of the screen. The width of the limiting end matches the thickness of the screen, limiting the longitudinal displacement of the screen. The limiting protrusions on both sides of the limiting end are elastically engaged with the limiting groove at the first end of the screen, enhancing the lateral and axial fixation of the screen and offsetting the impact of vibration. The baffle at the second end of the screen fits against the top wall of the inlet end, limiting the upward displacement of the screen and at the same time blocking the gap at the inlet end to prevent molding sand leakage.

[0015] Compared with existing technologies, this invention can significantly improve the stability of the screen in a vibration environment, prevent the screen from shifting or falling off, ensure stable sand screening effect, and effectively guarantee casting quality. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the feeding device of the automatic molding machine described in this embodiment of the present invention in the installed state;

[0018] Figure 2 for Figure 1 A perspective view of the feed inlet described in the embodiment;

[0019] Figure 3 for Figure 2 Exploded view;

[0020] Figure 4 for Figure 1 Right view of the feed inlet as described in the embodiment;

[0021] Figure 5 for Figure 1 Left view of the feed inlet as described in the embodiment.

[0022] The correspondence between the labels and component names in the attached figures is as follows:

[0023] 1. Feed inlet; 11. Collection inlet; 12. Collection box; 2. Conveyor belt; 21. Traveling wheel; 22. Steering wheel; 3. Molding sand box; 31. Sand pump; 4. Slot; 41. Inlet end; 42. Limiting end; 421. Limiting protrusion; 43. Guide bar; 5. Screen; 51. Limiting groove; 52. Stop bar; 53. Pull ring; 6. Automatic molding machine body. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to Figure 1-5 This embodiment provides a feeding device for an automatic molding machine, including a feeding port 1, a conveyor belt 2, a molding sand box 3, a slot 4, and a screen 5.

[0026] The automatic molding machine body 6 has an inlet 1 installed on top of the machine. A slot 4 is located on the side of the inlet 1, and a screen 5 is installed inside the slot 4 to screen molding sand and feed it into the machine body 6. The molding sand box 3 stores the molding sand to be screened. One end of the conveyor belt 2 extends into the molding sand box 3 (its position is adjustable via wheels 21 and 22), and the other end is located directly above the inlet 1, used to transport the molding sand above the inlet 1 and onto the screen 5. The bottom of the automatic molding machine body 6 is connected to the molding sand box 3 via a sand pump 31, which pumps any residual sand from the automatic molding machine body 6 back into the molding sand box 3. The above design is based on the existing design of the patent mentioned in the background section; therefore, its detailed structure and working principle will not be elaborated upon here.

[0027] The key point is that the slot 4 is inclined forward from top to bottom, with an angle of 30° with the horizontal plane. A collection port 11 is provided at the bottom of the front side wall of the feed inlet 1 (corresponding to the inclination direction of the slot 4). A collection box 12 is detachably connected to the outside of the feed inlet 1 below the collection port 11 by a buckle. This is used to collect large particulate impurities filtered out by the screen 5 (which slide down the inclined surface of the screen 5 to the collection port 11 and then fall into the collection box 12). The feed inlet 1 has slots 4 extending through its left and right side walls. Each slot 4 includes a right-side inlet end 41 (the side where the screen 5 is inserted) and a left-side limiting end 42 (the side where the screen 5 is installed). The inlet end 41 is 8mm wide (the screen 5 is 5mm thick), facilitating the insertion of the screen 5 into the slot 4 from the outside of the feed inlet 1. The limiting end 42 has a width that precisely matches the thickness of the screen 5 (5mm), limiting lateral movement of the screen 5 perpendicular to the inclined direction. Symmetrical rubber limiting protrusions 421 (2mm long) are provided in the middle of the two side walls of the limiting end 42, allowing for elastic deformation. Stainless steel guide strips 43 are provided on both sides of the bottom of the slot 4. Figure 3 Connect the inlet end 41 and the limit end 42 to guide the screen 5 to slide smoothly along the slot 4 and avoid jamming during installation.

[0028] The key feature is that the screen 5 is a metal mesh plate. On both sides of its first end (corresponding to the limiting end 42), there are limiting grooves 51 with a depth of 2mm at the corresponding limiting protrusions 421. During installation, the first end of the screen 5 slides to the limiting end 42, and the limiting protrusions 421 are inserted into the limiting grooves 51. They are elastically deformed under pressure to form an elastic snap. The second end of the screen 5 (corresponding to the inlet end 41) is provided with a metal pull ring 53 on the outside, which facilitates the application of force when disassembling the screen 5. The second end of the screen 5 is provided with a baffle 52. The two ends of the baffle 52 are flush with the sides of the screen 5, and the upper surface is tightly attached to the top wall of the inlet end 41. This not only restricts the upward movement of the screen 5, but also blocks the gap (3mm) of the inlet end 41 to prevent molding sand leakage.

[0029] The workflow of this utility model is as follows:

[0030] Material feeding stage: The molding sand in the molding sand box 3 is conveyed by the conveyor belt 2 to the top of the feed inlet 1 and falls onto the screen 5;

[0031] Screening stage: Molding sand enters the automatic molding machine body 6 through the mesh of screen 5. Large particles of impurities are intercepted and slide down the inclined surface of screen 5 to the collection port 11, and finally fall into the collection box 12.

[0032] Recovery phase: The residual sand and gravel in the automatic molding machine body 6 is transported back to the molding sand box 3 by the sand pump 31.

[0033] In the vibration environment generated during the operation of the automatic molding machine, the width of the limiting end 42 matches the thickness of the screen 5 to limit the longitudinal displacement of the screen 5. The elastic engagement of the rubber limiting protrusion 421 and the limiting groove 51 enhances the lateral and axial fixation of the screen 5. The baffle 52 fits against the top wall of the inlet end 41 to limit the upward displacement of the screen 5. The three work together to prevent the screen 5 from loosening or falling off, ensuring stable screening effect.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A feeding device for an automatic molding machine, comprising a feed inlet (1), a conveyor belt (2), and a molding sand box (3); the feed inlet (1) is connected to the main body (6) of the automatic molding machine, and a slot (4) is provided on the side of the feed inlet (1), in which a screen (5) is installed; one end of the conveyor belt (2) is located above the feed inlet (1), and the other end is connected to the molding sand box (3); characterized in that: The slot (4) is inclined forward from top to bottom. The front side wall of the feed inlet (1) is provided with a collection port (11) corresponding to the lower side of the slot (4). The slot (4) passes through the feed inlet (1). An inlet end (41) and a limiting end (42) are formed on the left and right side walls of the feed inlet (1), respectively. The width of the inlet end (41) is greater than the thickness of the screen (5). The width of the limiting end (42) matches the thickness of the screen (5). The two side walls of the limiting end (42) are provided with limiting protrusions (421). The two sides of the first end of the screen (5) are provided with limiting grooves (51) that cooperate with the limiting protrusions (421). The second end of the screen (5) is provided with a baffle (52) to match the width of the inlet end (41).

2. The feeding device for the automatic molding machine according to claim 1, characterized in that: The card slot (4) has guide strips (43) on both sides of its bottom, which connect the inlet end (41) and the limiting end (42).

3. The feeding device for the automatic molding machine according to claim 1, characterized in that: A collection box (12) for collecting large particulate impurities is provided on the outer side of the feed inlet (1) below the collection port (11).

4. The feeding device for the automatic molding machine according to claim 1, characterized in that: The limiting protrusion (421) is made of rubber and can be elastically engaged in the limiting groove (51).

5. The feeding device for the automatic molding machine according to claim 1, characterized in that: The screen (5) has a pull ring (53) on the outer side of the second end.

6. The feeding device for the automatic molding machine according to claim 1, characterized in that: The two ends of the baffle (52) are flush with the two sides of the screen (5), and the upper surface of the baffle (52) is in contact with the top wall of the inlet end (41).

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