Automatic sand adding device for molding in casting workshop and working method of automatic sand adding device

Abstract

The casting workshop modeling automatic sand adding device comprises a sand storage tank and a sand outlet mechanism arranged on the lower side of the sand storage tank, the sand outlet mechanism comprises a sand outlet nozzle and a sand outlet hose connected with the sand outlet nozzle and the bottom of the sand storage tank, a control valve used for controlling opening and closing of the sand outlet nozzle is arranged in the sand outlet nozzle, and the sand outlet hose is connected with the sand outlet nozzle. The sand outlet nozzle is further provided with a sand nozzle moving mechanism used for controlling the sand outlet nozzle to move in all directions in the horizontal direction, a sand box positioning mechanism used for detecting an opening of a sand box is further arranged beside the sand outlet nozzle, and the sand box positioning mechanism is used for being matched with the sand nozzle moving mechanism. The sand box positioning mechanism is arranged to be matched with the sand nozzle moving mechanism, so that automatic and uniform sand injection is achieved, the automation degree is higher, sand injection is more uniform, the position of the sand injection nozzle does not need to be manually adjusted, the production efficiency is improved, and the production cost is reduced. And the labor intensity is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of casting, and in particular to an automatic sand feeder for molding in a foundry and its working method. Background Technology

[0002] Casting is one of the earliest metal heat treatment processes mastered by humankind. Casting involves pouring molten metal into a cavity conforming to the shape of the part, allowing it to cool and solidify to obtain the part or blank. Sand casting refers to the casting method of producing castings in sand molds. Steel, iron, and most non-ferrous alloy castings can be obtained using sand casting methods.

[0003] When sand casting, a large amount of sand needs to be added. Currently, most sand adding devices on the market have fixed sand inlet positions, which makes it impossible to add sand evenly into the sand box during the sand adding process. Uneven sand in the sand box may cause instability in the later casting process and affect the casting effect. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art and to propose an automatic sand feeder for molding in a foundry and its working method, which can add sand and gravel more evenly into the sand box and improve the stability of the sand and gravel in the sand box.

[0005] To achieve the above objectives, this invention proposes an automatic sand feeder for foundry molding, comprising a sand storage tank and a sand discharge mechanism located below the sand storage tank. The sand discharge mechanism includes a sand discharge nozzle and a sand discharge hose connecting the sand discharge nozzle and the bottom of the sand storage tank. The sand discharge nozzle is equipped with a control valve for controlling its opening and closing. The sand discharge nozzle is also equipped with a sand nozzle moving mechanism for controlling its horizontal movement. Next to the sand discharge nozzle is a sand box positioning mechanism for detecting the opening of the sand box. The sand box positioning mechanism cooperates with the sand nozzle moving mechanism. The sand nozzle moving mechanism controls the horizontal movement of the sand discharge nozzle according to the data from the sand box positioning mechanism, thereby uniformly injecting foundry sand into the sand box.

[0006] Preferably, the sand nozzle moving mechanism includes at least three telescopic rods, which are arranged in a circular array around the sand nozzle. One end of each rod is hinged to the outer wall of the sand nozzle, and the other end is hinged to the outer wall of the sand storage tank. The position of the sand nozzle is adjusted by controlling the extension length of each telescopic rod.

[0007] Preferably, the system also includes a conveyor belt laid under the sand storage tank, with the sand box positioning mechanism and the sand storage tank sequentially arranged on the upper side of the conveyor belt.

[0008] Preferably, the sand box positioning mechanism includes a base plate, a plurality of protrusions arranged in an array on the lower side of the base plate, a plurality of pressure block sensors arranged in an array on the lower side of the base plate, an elastic block located at the sensing position of the pressure block sensor, and a lifting mechanism for driving the base plate to move in a direction away from or towards the conveyor belt.

[0009] When the conveyor belt transports the sand box to below the sand box positioning mechanism, the lifting mechanism drives the base plate to move towards the sand box so that the corresponding elastic block on the base plate contacts the sand box. The elastic block at the contact position with the sand box will be compressed, and the pressure block sensor corresponding to the elastic block will transmit a signal to the control system. The control system collects and summarizes the signals of each pressure block sensor to draw a shape diagram of the opening position on the upper side of the sand box. The sand nozzle moving mechanism controls the horizontal movement of the sand nozzle according to the shape diagram of the opening position on the upper side of the sand box so as to evenly inject the casting sand into the sand box.

[0010] Preferably, a distance sensor for measuring the distance between the substrate and the conveyor belt is provided, and the height of the sand box is determined based on the data from the distance sensor.

[0011] Preferably, the lifting mechanism includes lifting cylinders and several guide slides disposed on both sides of the conveyor belt, with the other end of the lifting cylinder connected to the base plate, and the base plate slidably connected to the guide slides via a sliding sleeve.

[0012] Preferably, a feeding box is provided next to the sand storage tank, and a material elevator is provided between the feeding box and the sand storage tank.

[0013] Another object of the present invention is to provide a working method for an automatic sand feeder for molding in a foundry workshop as described in any of the above claims, characterized by comprising the following steps:

[0014] Step S1: Move the sand box that needs to be added to the sand box below the sand box positioning mechanism, and position the sand box injection port of the sand box using the sand box positioning mechanism.

[0015] Step S2: The sand box that needs to be added sand is transferred to the bottom of the sand outlet using the transfer equipment. The control valve is opened to inject the casting sand in the sand storage tank into the sand box. The sand outlet moving mechanism controls the horizontal movement of the sand outlet according to the sand box positioning mechanism to inject the casting sand evenly into the sand box.

[0016] Step S3: After sand injection is completed, stop the sand injection manually or automatically.

[0017] The beneficial effects of the automatic sand feeder for foundry molding and its working method of the present invention are as follows: The present invention sets up a sand box positioning mechanism and a sand nozzle moving mechanism to cooperate. First, the sand box positioning mechanism positions the sand injection port of the sand box. Then, the sand nozzle moving mechanism controls the horizontal movement of the sand nozzle according to the sand injection port position data positioned by the sand box positioning mechanism, thereby uniformly injecting the foundry sand into the sand box, realizing automatic and uniform sand injection. The degree of automation is higher, the sand injection is more uniform, and there is no need to manually adjust the position of the sand injection nozzle, reducing the intensity of manual labor.

[0018] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an automatic sand-adding device for casting workshops according to the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of an automatic sand feeder for casting workshops according to the present invention.

[0021] Figure 3 This is a schematic diagram of the main structure of an automatic sand feeder for casting workshops according to the present invention.

[0022] Figure 4 This is a side view structural schematic diagram of an automatic sand feeding device for molding in a foundry workshop according to the present invention.

[0023] Figure 5 This is a top view schematic diagram of an automatic sand feeder for casting workshops according to the present invention.

[0024] In the diagram: 1-Sand storage tank, 2-Telescopic rod, 3-Conveyor belt, 4-Base plate, 5-Pressure block sensor, 6-Lifting mechanism, 7-Feeding box, 8-Material elevator, 9-Manual control mechanism, 11-Sand outlet nozzle, 12-Sand outlet hose, 51-Elastic block, 61-Lifting cylinder, 62-Guide slide bar, 71-Material elevator. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0026] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0027] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example 1:

[0030] See Figures 1-5The present invention relates to an automatic sand feeder for casting workshops, comprising a conveyor belt 3 for sequentially conveying sand boxes, a sand box positioning mechanism and a sand storage tank 1 arranged sequentially from the input end to the output end of the conveyor belt 3, and a sand discharge mechanism provided on the lower side of the sand storage tank 1, wherein the sand discharge mechanism includes a sand discharge nozzle 11 and a sand discharge hose 12 connecting the sand discharge nozzle 11 and the bottom of the sand storage tank 1, the sand discharge nozzle 11 is provided with a control valve for controlling its opening and closing, and the sand discharge nozzle 11 is also provided with a sand nozzle moving mechanism for controlling its movement in all directions along the horizontal direction, the sand box positioning mechanism is used to cooperate with the sand nozzle moving mechanism, and the sand nozzle moving mechanism controls the horizontal movement of the sand discharge nozzle 11 according to the data of the sand box positioning mechanism, thereby uniformly injecting casting sand into the sand box. In this embodiment, a sand box positioning mechanism and a sand nozzle moving mechanism are set up to cooperate. First, the sand box positioning mechanism positions the sand injection port of the sand box. Then, the conveyor belt 3 transports the sand box to the area below the sand outlet 11. The control valve is opened to inject the casting sand in the storage tank 1 into the sand box. The sand nozzle moving mechanism controls the horizontal movement of the sand outlet 11 according to the sand box injection port position data positioned by the sand box positioning mechanism, thereby injecting the casting sand evenly into the sand box, realizing automatic and uniform sand injection. The degree of automation is higher, the sand injection is more uniform, and there is no need to manually adjust the position of the sand injection nozzle, reducing the intensity of manual labor.

[0031] For details regarding the specific structure of the sand nozzle moving mechanism, please refer to [link / reference]. Figure 1 The sand nozzle moving mechanism includes three telescopic rods 2, which are arranged in a circular array around the sand nozzle 11. One end of each rod is hinged to the outer wall of the sand nozzle 11, and the other end is hinged to the outer wall of the sand storage tank 1. The position of the sand nozzle 11 is adjusted by controlling the extension length of each telescopic rod 2. This allows for free adjustment of the position and height of the sand nozzle 11, adapting to the sand filling needs of various sand boxes.

[0032] Regarding the specific structure of the sand box positioning mechanism, the sand box positioning mechanism includes a base plate 4, a plurality of pressure block sensors 5 arranged in an array on the lower side of the base plate 4, an elastic block 51 located at the sensing position of the pressure block sensor 5, and a lifting mechanism 6 for driving the base plate 4 to move away from or closer to the conveyor belt 3.

[0033] When the conveyor belt 3 transports the sand box to the area below the sand box positioning mechanism, the lifting mechanism 6 drives the base plate 4 to move towards the sand box, so that the corresponding elastic block 51 on the base plate 4 contacts the sand box. The elastic block 51 at the contact position with the sand box is compressed, and the pressure block sensor 5 corresponding to the elastic block 51 transmits a signal to the control system. The control system collects and summarizes the signals from each pressure block sensor, thereby drawing a shape diagram of the opening position on the upper side of the sand box. The sand nozzle moving mechanism controls the horizontal movement of the sand nozzle 11 according to the shape diagram of the opening position on the upper side of the sand box, thereby uniformly injecting casting sand into the sand box. In this embodiment, the sand box positioning mechanism cooperates with the pressure block sensor and the telescopic pressure block 5. By contacting the sand box, it receives signals from each pressure block sensor to draw a shape diagram of the sand box opening. This positioning method is more stable than the visual positioning scheme and can effectively avoid the problem of dust contaminating the visual positioning camera during the sand injection process, thus preventing inaccurate positioning.

[0034] Specifically, the lifting mechanism 6 includes lifting cylinders 61 and two guide slide rods 62 disposed on both sides of the conveyor belt 3. The other end of the lifting cylinder 61 is connected to the base plate 4, and the base plate 4 is slidably connected to the guide slide rods 62 through a sliding sleeve.

[0035] Example 2:

[0036] See Figure 1 , Figure 3 Based on Embodiment 1, a distance sensor 8 for measuring the distance between the substrate 4 and the conveyor belt 3 is also provided. The height of the sand box is determined based on the data from the distance sensor 8. When the sand box opening is positioned by contacting the sand box with the sand box positioning mechanism, the descent height of the substrate 4 can be measured by the distance sensor 8 to determine the position of the upper surface of the sand box. Based on the data, the sand nozzle moving mechanism is controlled to adjust the sand nozzle 11 to a suitable height, making the sand injection more accurate.

[0037] See Figure 1 A feeding box 7 is also provided next to the sand storage tank 1, and a material elevator 8 is provided between the feeding box 7 and the sand storage tank 1. The feeding box 7 is located in a position where the staff can easily add materials, making it more convenient to add materials without having to manually climb to the opening of the sand storage tank 1 to add sand.

[0038] See Figure 1 A manual control mechanism 9 is provided next to the sand storage tank 1 to control the sand nozzle movement mechanism and control valve. When the sand nozzle movement mechanism and the sand outlet 11 add sand to the sand box, the staff can observe the sand injection situation at the position of the sand storage tank 1. When it is full, the sand injection of the sand box can be manually stopped through the manual control mechanism 9 and switched to the next sand box for easy control.

[0039] Example 3:

[0040] This embodiment describes a working method for the automatic sand feeder used in the foundry molding workshop as described in either Embodiment 1 or 2, including the following steps:

[0041] Step S1: Move the sand box that needs to be added to the sand box to the bottom of the sand box positioning mechanism via the conveyor belt 3, and first position the sand box injection port of the sand box by the sand box positioning mechanism.

[0042] Step S2: Then, the sand box that needs to be added sand is transported to the bottom of the sand outlet 11 by the conveyor belt 3. The control valve is opened to inject the casting sand in the sand storage tank 1 into the sand box. The sand outlet moving mechanism controls the sand outlet 11 to move horizontally according to the sand box positioning mechanism to inject the casting sand evenly into the sand box.

[0043] Step S3: After sand injection is completed, stop the sand injection manually or automatically using the manual control mechanism 9.

[0044] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The internal components of the electric slide rail, cylinder, welding machine, electric telescopic rod and controller all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete the normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the existing technology, and will not be described in detail here.

[0045] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural or procedural transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. An automatic sand feeder for molding in a foundry, comprising a sand storage tank (1) and a sand discharge mechanism disposed below the sand storage tank (1), characterized in that: The sand discharge mechanism includes a sand discharge nozzle (11) and a sand discharge hose (12) connecting the sand discharge nozzle (11) and the bottom of the sand storage tank (1). The sand discharge nozzle (11) is provided with a control valve for controlling its opening and closing. The sand discharge nozzle (11) is also provided with a sand nozzle moving mechanism for controlling its movement in all directions along the horizontal direction. Next to the sand discharge nozzle (11) is a sand box positioning mechanism for detecting the opening of the sand box. The sand box positioning mechanism is used to cooperate with the sand nozzle moving mechanism. The sand nozzle moving mechanism controls the horizontal movement of the sand discharge nozzle (11) according to the data of the sand box positioning mechanism, thereby uniformly injecting casting sand into the sand box.

2. The automatic sand feeder for casting workshops as described in claim 1, characterized in that: The sand nozzle moving mechanism includes at least three telescopic rods (2), which are arranged in a ring array around the sand nozzle (11). One end of the telescopic rods (2) is hinged to the outer wall of the sand nozzle (11), and the other end is hinged to the outer wall of the sand storage tank (1). The position of the sand nozzle (11) is adjusted by controlling the extension length of each telescopic rod (2).

3. The automatic sand feeder for casting workshops as described in claim 1, characterized in that: It also includes a conveyor belt (3) laid on the lower side of the sand storage tank (1), and the sand box positioning mechanism and the sand storage tank (1) are arranged on the upper side of the conveyor belt (3) in sequence.

4. The automatic sand feeder for casting workshops as described in claim 3, characterized in that: The sand box positioning mechanism includes a base plate (4), a plurality of pressure block sensors (5) arranged in an array on the lower side of the base plate (4), an elastic block (51) located at the sensing position of the pressure block sensor (5), and a lifting mechanism (6) for driving the base plate (4) to move away from or closer to the conveyor belt (3). When the conveyor belt (3) transports the sand box to the area below the sand box positioning mechanism, the lifting mechanism (6) drives the base plate (4) to move towards the sand box so that the corresponding elastic block (51) on the base plate (4) contacts the sand box. The elastic block (51) at the contact position with the sand box will be compressed. The pressure sensor (5) corresponding to the elastic block (51) transmits the signal to the control system. The control system collects and summarizes the signals of each pressure sensor, thereby drawing a shape diagram of the opening position on the upper side of the sand box. The sand nozzle moving mechanism controls the sand outlet nozzle (11) to move horizontally according to the shape diagram of the opening position on the upper side of the sand box, thereby uniformly injecting the casting sand into the sand box.

5. The automatic sand feeder for molding in a foundry workshop as described in claim 4, characterized in that: A distance sensor (8) for measuring the distance between the substrate (4) and the conveyor belt (3) is also provided, and the height of the sand box is determined based on the data of the distance sensor (8).

6. The automatic sand feeder for casting workshops as described in claim 3, characterized in that: The lifting mechanism (6) includes lifting cylinders (61) and several guide slides (62) located on both sides of the conveyor belt (3). The other end of the lifting cylinder (61) is connected to the base plate (4), and the base plate (4) is slidably connected to the guide slides (62) through a sliding sleeve.

7. The automatic sand feeder for casting workshops as described in claim 1, characterized in that: A feeding box (7) is also provided next to the sand storage tank (1), and a material elevator (71) is provided between the feeding box (7) and the sand storage tank (1).

8. The automatic sand feeder for casting workshops as described in claim 1, characterized in that: A manual control mechanism (9) for controlling the movement of the sand nozzle and the control valve is provided next to the sand storage tank (1).

9. A method for operating the automatic sand feeder for molding in a foundry as described in any one of claims 1-8, characterized in that, Includes the following steps: Step S1: Move the sand box that needs to be added to the sand box below the sand box positioning mechanism, and position the sand box injection port of the sand box using the sand box positioning mechanism. Step S2: The sand box that needs to be added sand is transferred to the sand outlet (11) by the transfer equipment. The control valve is opened to inject the casting sand in the sand storage tank (1) into the sand box. The sand outlet moving mechanism controls the sand outlet (11) to move horizontally according to the sand box positioning mechanism to inject the casting sand evenly into the sand box. Step S3: After sand injection is completed, stop the sand injection manually or automatically.

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