Sand pretreatment device

Abstract

This utility model discloses a sand pretreatment device, comprising: a filtration module including a support frame and a collection hopper mounted on the support frame, the top of the collection hopper having a filtration component and the bottom of the collection hopper having a sand outlet; a drying module including a housing and a microwave heater, the microwave heater having a microwave outlet, the housing being made of metal material, a drying channel being provided inside the housing, and a first opening being provided on the side wall of the housing, with the microwave outlet located at the first opening; and a conveying module including a vacuum conveyor, with the drying channel connected between the sand outlet and the vacuum conveyor. In use, purchased quartz sand can be poured onto the upper side of the filtration component for filtration, removing large particles of impurities from the quartz sand. After filtration, the quartz sand is conveyed to the drying channel for drying, removing excess moisture, and then conveyed by the conveying module to the subsequent mixing process with the curing agent, avoiding defects such as uneven sand spreading and weak adhesion during subsequent printing.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a sand pretreatment device. Background Technology

[0002] The molding sand for sand mold 3D printers is made by mixing quartz sand and curing agent in a certain ratio. Since the purchased quartz sand may contain impurities or become damp during storage and transportation, directly mixing the purchased quartz sand with the curing agent can easily lead to defects such as uneven sand spreading and weak bonding during the printing process. Therefore, it is urgent to design a sand pretreatment device to pretreat the purchased quartz sand. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a sand pretreatment device.

[0004] The sand pretreatment device according to an embodiment of the present invention includes:

[0005] A filtration module includes a support frame and a collection hopper disposed on the support frame. The top of the collection hopper is provided with a filtration component, and the bottom of the collection hopper is provided with a sand outlet.

[0006] A drying module includes a housing and a microwave heater, the microwave heater having a microwave outlet, the housing being made of metal, a drying channel being provided inside the housing, a first opening being provided on the side wall of the housing, and the microwave outlet being located at the first opening;

[0007] The conveying module includes a vacuum conveyor, and the drying channel is connected between the sand outlet and the vacuum conveyor.

[0008] The sand pretreatment device according to the embodiment of this utility model has at least the following technical effects: by setting a filtration module and a drying module, the purchased quartz sand can be sprinkled on the upper side of the filtration component for filtration to remove large particles of impurities from the quartz sand. After filtration, the quartz sand is transported to the drying channel for drying to remove excess moisture from the quartz sand. Then, it is transported by the conveying module to the subsequent process of mixing with the curing agent, thus avoiding defects such as uneven sand spreading and weak bonding in the subsequent printing process.

[0009] According to some embodiments of this utility model, the drying channel is a plastic tube.

[0010] According to some embodiments of the present invention, the outer wall of the collecting hopper is provided with a first vibrator.

[0011] According to some embodiments of the present invention, the inner bottom of the collecting hopper is provided with a conical sand-dispersing component, and a connecting frame is connected between the sand-dispersing component and the collecting hopper. The radial dimension of the sand-dispersing component gradually increases from top to bottom, and a first gap is provided between the bottom edge of the sand-dispersing component and the inner wall of the collecting hopper.

[0012] According to some embodiments of the present invention, the filter module further includes a mounting frame, the filter component is disposed on the mounting frame, and the mounting frame is provided with a second vibrator.

[0013] According to some embodiments of the present invention, an elastic structure connects the mounting frame and the support frame.

[0014] According to some embodiments of the present invention, the mounting frame is frame-shaped, and the filter component is disposed on the inner side of the mounting frame.

[0015] According to some embodiments of the present invention, the elastic structure includes a plurality of elastic units, which are arranged sequentially at intervals along the circumference of the mounting frame.

[0016] According to some embodiments of the present invention, the elastic unit includes a vertically arranged spring, and the top and bottom of the elastic unit are respectively connected to the mounting frame and the support frame.

[0017] According to some embodiments of the present invention, the mounting frame is provided with a accommodating space for laying filter cloth, and the filtering component is a filter screen, which is located at the bottom of the accommodating space.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the sand pretreatment device according to an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 An enlarged view of region A in the diagram;

[0022] Figure 3 yes Figure 1 A cross-sectional view of the shell inside;

[0023] Figure 4 yes Figure 1 A three-dimensional structural diagram of the collection hopper;

[0024] In the attached image:

[0025] 100-Shell; 110-Microwave heater; 120-Drying channel; 121-Connecting pipe; 200-Support frame; 210-Collection hopper; 211-First vibrator; 212-Connecting frame; 213-Sand outlet; 214-Sand dispersing component; 220-Mounting frame; 221-Filter screen; 222-Second vibrator; 231-Spring; 232-Lower cap. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate 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 this utility model. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] The following is for reference. Figures 1 to 4 This invention describes a sand pretreatment device according to an embodiment of the present invention.

[0030] The sand pretreatment device of this utility model includes a filtration module, a drying module and a conveying module.

[0031] Reference Figure 1The filtration module includes a support frame 200 and a collection hopper 210 disposed on the support frame 200. A filter component is provided on the top of the collection hopper 210. The cross-sectional area of ​​the internal space of the collection hopper 210 gradually decreases from top to bottom, so that the sand passing through the filter component can be gathered and collected at the bottom of the collection hopper 210 under the action of gravity. A sand outlet 213 is provided at the bottom of the collection hopper 210. The support frame 200 is used to place on the ground, and the collection hopper 210 is fixedly set on the support frame 200, so that there is still a certain height difference between the bottom of the collection hopper 210 and the ground, so that the sand outlet 213 can be connected to the drying module by installing the connecting pipe 121.

[0032] The drying module includes a housing 100 and a microwave heater 110. The housing 100 is made of stainless steel or other metal materials and is located on the lower left side of the filter module. The housing 100 is fixedly mounted relative to the support frame 200. The microwave heater 110 is located beside the housing 100. Both the housing 100 and the microwave heater 110 can be mounted on the ground. The microwave heater 110 has a microwave outlet. The microwave heater 110 is a conventional component in this field and can be purchased directly from the market; its specific structure will not be described in detail here. (Refer to...) Figure 3 The housing 100 is provided with a drying channel 120, which extends laterally and penetrates the housing 100. The side wall of the housing 100 is provided with a first opening, and the microwave outlet is located at the first opening, so that the microwave energy emitted by the microwave heater 110 enters the interior of the housing 100 through the first opening.

[0033] The conveying module includes a vacuum conveyor, which has a conveying inlet and a conveying outlet. The vacuum conveyor can convey powdery or granular materials at the conveying inlet to the conveying outlet. The vacuum conveyor is a conventional component in this field and can be purchased directly from the market. Its specific structure will not be described in detail here. The drying channel 120 is connected between the sand outlet 213 and the vacuum conveyor. The right end of the drying channel 120 is connected to the sand outlet 213 through a first connecting pipe, and the left end of the drying channel 120 is connected to the conveying inlet of the vacuum conveyor through a second connecting pipe.

[0034] Understandably, if the purchased quartz sand contains large particles such as stones, metal shavings, and agglomerated sand lumps, these particles can easily cause the scraper or roller to get stuck when the sand is mixed with the curing agent and supplied to the 3D printing equipment, resulting in uneven sand spreading. If the purchased quartz sand is damp, the water in the quartz sand will dilute the subsequently added curing agent, reduce the concentration and reactivity of the curing agent, or cause side reactions with the curing agent, resulting in poor bonding of the sand mold.

[0035] This invention incorporates a filtration module and a drying module. During use, purchased quartz sand can be poured onto the upper side of the filtration component for filtration, removing large particles of impurities. After filtration, the quartz sand is conveyed to the drying channel 120 for drying to remove excess moisture. It is then conveyed by the conveying module to the subsequent process of mixing with the curing agent, thus avoiding defects such as uneven sand spreading and weak adhesion during subsequent printing.

[0036] The quartz sand is dried by setting up a microwave heater 110. The microwave heating method can directly heat all the quartz sand in the drying channel 120, and not only heat the quartz sand in contact with the inner wall of the drying channel 120. It also eliminates the need to set up heating elements in the drying channel 120, which would hinder the flow of quartz sand. By setting up a vacuum conveyor, the effect of conveying quartz sand can be achieved, and water vapor generated during the drying process can also be extracted to prevent water vapor from being transported with the quartz sand and mixed with the curing agent.

[0037] In some embodiments of this invention, the drying channel 120 is a plastic tube. The plastic tube does not block the penetration of microwaves, resulting in a better heating and drying effect of the microwave heater 110 on the quartz sand.

[0038] In some embodiments of this utility model, a first vibrator 211 is provided on the outer wall of the collecting hopper 210. It is understood that quartz sand with a high water content will agglomerate and form sand bridges suspended above the sand outlet 213; in this embodiment, by setting the first vibrator 211, the first vibrator 211 can be activated during use to break the sand bridges formed by the quartz sand in the collecting hopper 210 through vibration, so that the quartz sand can fall smoothly to the sand outlet 213; wherein, the first vibrator 211 is a turbine vibrator.

[0039] In some embodiments of this utility model, reference is made to Figure 4 The inner bottom of the collecting hopper 210 is provided with a conical sand-dispersing component 214. A connecting frame 212 connects the sand-dispersing component 214 to the collecting hopper 210. The radial dimension of the sand-dispersing component 214 gradually increases from top to bottom, and a first gap is provided between the bottom edge of the sand-dispersing component 214 and the inner wall of the collecting hopper 210. By setting the sand-dispersing component 214, clumps of quartz sand falling onto the sand-dispersing component 214 can be dispersed to the outer periphery of the bottom of the sand-dispersing component 214, leaving a certain space above the sand outlet 213, thus avoiding the problem of quartz sand completely clogging the sand outlet 213 and causing the vacuum conveyor to fail to transport quartz sand. Moreover, when the first vibrator 211 is set, the sand-dispersing component 214 can also make the quartz sand closer to the inner wall of the collecting hopper 210, so that the vibration effect of the first vibrator 211 on the quartz sand is better.

[0040] In some embodiments of this utility model, the filter module further includes a mounting frame 220, on which the filter component is disposed. The mounting frame 220 is equipped with a second vibrator 222. The second vibrator 222 can vibrate the quartz sand on the filter component to improve the filtration efficiency. The second vibrator 222 can be a vibration motor.

[0041] In some embodiments of this utility model, an elastic structure connects the mounting frame 220 and the support frame 200. It is understood that quartz sand particles have high hardness and density, easily accumulating on the surface of the filter element to form a dense layer. A large amplitude of vibration is required to generate a strong inertial force, causing the quartz sand layer to loosen and tumble, preventing particles from getting stuck in the filter pores, thus achieving higher filtration efficiency. This embodiment, by setting an elastic structure, reduces the restriction of the support frame 200 on the mounting frame 220, which helps to increase the vibration amplitude of the mounting frame 220, thereby improving filtration efficiency.

[0042] In some embodiments of this invention, the mounting frame 220 is frame-shaped, and the filter component is located inside the mounting frame 220. This ensures that the mounting frame 220 does not obstruct the filtration of the quartz sand.

[0043] In some embodiments of this invention, the elastic structure includes multiple elastic units, which are arranged sequentially at intervals along the circumference of the mounting frame 220. This results in more uniform stress distribution throughout the mounting frame 220, leading to structural stability.

[0044] In some embodiments of this utility model, the elastic unit includes a vertically arranged spring 231, and the top and bottom of the elastic unit are respectively connected to the mounting bracket 220 and the support bracket 200. The spring 231 has a simple structure and is easy to install; wherein, referring to... Figure 2 The elastic unit also includes an upper cap located at the upper end of the spring 231 and a lower cap 232 located at the lower end of the spring 231. The spring 231 abuts against the mounting bracket 220 from bottom to top through the upper cap, and the spring 231 abuts against the support bracket 200 from top to bottom through the lower cap 232. Both the upper cap and the lower cap 232 are provided with grooves for accommodating the ends of the spring 231. The upper cap is fixedly mounted on the mounting bracket 220, and the lower cap 232 is fixedly mounted on the support bracket 200. The upper and lower ends of the spring 231 are detachably inserted into the upper cap and the lower cap 232, respectively, which facilitates the replacement of the spring 231.

[0045] In some embodiments of this utility model, the mounting frame 220 is provided with a receiving space for laying filter cloth, and the filtering component is a filter screen 221, which is located at the bottom of the receiving space. In this way, the filter cloth can be laid on top of the filter screen 221, and after filtering the quartz sand, the filter cloth can be removed to remove the filtered large particles of impurities, making it convenient to use; the design of the receiving space also prevents the filter cloth from slipping and falling off.

[0046] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A sand pretreatment device, characterized by, include: A filtration module includes a support frame and a collection hopper disposed on the support frame. The top of the collection hopper is provided with a filtration component, and the bottom of the collection hopper is provided with a sand outlet. A drying module includes a housing and a microwave heater, the microwave heater having a microwave outlet, the housing being made of metal, a drying channel being provided inside the housing, a first opening being provided on the side wall of the housing, and the microwave outlet being located at the first opening; The conveying module includes a vacuum conveyor, and the drying channel is connected between the sand outlet and the vacuum conveyor.

2. A sand pretreatment apparatus according to claim 1, characterized in that: The drying channel is a plastic tube.

3. The sand pretreatment apparatus of claim 1, wherein: The outer wall of the collection hopper is equipped with a first vibrator.

4. The sand pretreatment apparatus of claim 1, wherein: The inner bottom of the collection hopper is provided with a cone-shaped sand-dispersing component. A connecting frame is connected between the sand-dispersing component and the collection hopper. The radial dimension of the sand-dispersing component gradually increases from top to bottom. A first gap is provided between the bottom edge of the sand-dispersing component and the inner wall of the collection hopper.

5. The sand pretreatment apparatus of claim 1, wherein: The filter module also includes a mounting bracket, on which the filter component is disposed, and the mounting bracket is provided with a second vibrator.

6. A sand pretreatment apparatus according to claim 5, characterised in that: The mounting frame and the support frame are connected by an elastic structure.

7. A sand pretreatment apparatus according to claim 6, characterised in that: The mounting frame is frame-shaped, and the filter component is located on the inner side of the mounting frame.

8. A sand pretreatment apparatus according to claim 7, characterised in that: The elastic structure includes multiple elastic units, which are arranged at intervals along the circumference of the mounting frame.

9. A sand pretreatment apparatus according to claim 8, characterised in that: The elastic unit includes a vertically arranged spring, and the top and bottom of the elastic unit are respectively connected to the mounting frame and the support frame.

10. The sand pretreatment apparatus of claim 7, wherein: The mounting frame has a accommodating space for laying filter cloth, and the filtering component is a filter screen, which is located at the bottom of the accommodating space.

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