Working box assembly applied to 3D printing equipment

Abstract

The working box assembly applied to the 3D printing equipment is characterized in that the working box assembly comprises a working box body, a lifting bottom plate and a curing mechanism, the working box body is a frame-shaped structural part defined by a plurality of side plates, and the lifting bottom plate is movably arranged in the working box body; a plurality of first ventilation grooves are formed in at least one side plate at intervals, ventilation nets are laid on the first ventilation grooves, the curing mechanism comprises a sealing cover and an air supply device, the sealing cover covers the outer side faces of the side plates, one end of the air supply device communicates with the sealing cover, and the other end of the air supply device communicates with the air supply device. And the air supply device is communicated with the first ventilation groove through the sealing cover. According to the scheme, the problem that an existing binder jet printing product is difficult to cure, uneven in curing and low in curing efficiency, and consequently the product quality is poor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, in particular to a working box component applied to 3D printing equipment. Background Art

[0002] At present, the main 3D printing molding methods include laser sintering molding, UV curing molding, chemical reaction molding, etc. This method is to pass the powder through a powder spreader, flatten the powder with a scraper or roller, and then scan the product cross-section with a laser beam, UV beam, and reactive adhesive, and repeat this process to print out the entire product. The overall cost of laser equipment and photocuring molding equipment is relatively high, the material requirements are high, and the printing efficiency is low. In contrast, the cost of micro-jet bonding is relatively low, the process is relatively simple, and it has good application prospects. At present, the most commonly used binder is the furan resin system. With the changes in the market environment, materials such as phenolic resin, inorganic binder, and metal binder have more advantages than furan resin.

[0003] However, phenolic resin requires high temperature to have strength, and inorganic binders and metal binders will only work when moisture is lost. During the 3D printing process, the existing heating method cannot completely cure the product. It is often the case that the entire product fails because the temperature from the middle to the bottom cannot reach the resin curing temperature. This greatly limits the application of phenolic resin, inorganic binder, and metal binder products. Utility Model Content

[0004] Based on this, it is necessary to provide a work box assembly for 3D printing equipment to address the problems of poor product quality caused by difficult curing, uneven curing and low curing efficiency in existing binder jet printing products.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] The utility model embodiment discloses a work box assembly applied to 3D printing equipment, including a work box body, a lifting base plate and a curing mechanism, the work box body is a frame-shaped structural member surrounded by a plurality of side panels, the lifting base plate is movably arranged in the work box body, at least one of the side panels is provided with a plurality of first air permeable grooves spaced apart, an air permeable net is laid on the first air permeable groove, the curing mechanism includes a sealing cover and an air supply device, the sealing cover is provided on the outer side surface of the side panel, one end of the air supply device is connected to the sealing cover, and the air supply device is connected to the first air permeable groove through the sealing cover.

[0007] In one embodiment, the first ventilation slot is a rectangular hole, and the center line of the rectangular hole is not perpendicular or parallel to the plane where the lifting base plate is located.

[0008] In one embodiment, the side panel is a double-layer panel, and the inner panel of the side panel is provided with the first ventilation groove, the outer panel of the side panel is provided with a plurality of ventilation holes opposite to the first ventilation groove, and the sealing cover is provided on the ventilation holes.

[0009] In one embodiment, the side panel is a double-layer panel, and the inner panel of the side panel is provided with the first air permeable groove, and the outer panel of the side panel is provided with the second air permeable groove, the second air permeable groove is arranged opposite to at least two of the first air permeable grooves, and the sealing cover is arranged on the second air permeable groove.

[0010] In one embodiment, a plurality of the first air permeable grooves are distributed in a matrix on the side plate, and a plurality of the sealing covers are provided, each of the sealing covers being arranged on each row or column of the first air permeable grooves.

[0011] In one embodiment, there are multiple sealing covers, and each sealing corresponding cover is arranged on each of the first air permeable grooves.

[0012] In one embodiment, two adjacent sealing covers are connected via a pipeline, and the air supply device is connected to one of the sealing covers.

[0013] In one embodiment, the lifting base plate includes a base plate body and a breathable plate, the breathable plate covers the base plate body, and a breathable cavity is opened on one side of the base plate body facing the breathable plate, and the air supply device is connected to the breathable cavity.

[0014] In one embodiment, the breathable plate includes a reinforcement layer and a breathable layer connected to each other, and the reinforcement layer is located between the breathable layer and the breathable cavity.

[0015] In one embodiment, the air-permeable cavity includes a plurality of interconnected air-permeable strip grooves, and the air supply device is connected to one of the air-permeable strip grooves.

[0016] The technical solution adopted by the utility model can achieve the following beneficial effects:

[0017] In a work box assembly for 3D printing disclosed in an embodiment of the utility model, by opening air holes in the side panels of the work box body 100, and then increasing negative pressure or positive pressure in the air holes, the moisture generated in the work box body can be better processed with the help of air flow, so that the sand core is easier to solidify and the sand core curing efficiency is improved. In this way, many problems such as the difficulty in curing, uneven curing, low curing efficiency, and inconsistency in product size caused by ink seepage due to long-term non-baking of products with existing phenolic binders, inorganic binders, and metal printing binders are overcome, and the problem that phenolic binders, inorganic binders, and metal printing binders cannot be promoted and applied is solved, and the curing speed of the product is effectively improved, the product is fully cured, and the product with uniform size and quality is better obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the working box assembly disclosed in the embodiment of the utility model;

[0019] Figure 2 The present invention is a schematic structural diagram of a lifting base plate disclosed in an embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 100 - working box body, 110 - breathable net, 200 - lifting bottom plate, 210 - bottom plate body, 211 - breathable cavity, 220 - reinforcement layer, 230 - breathable layer, 240 - sealing layer, 310 - sealing cover. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] like Figure 1-Figure 2 As shown, an embodiment of the utility model discloses a working box assembly applied to a 3D printing device. The disclosed working box assembly applied to the 3D printing device includes a working box body 100, a lifting base plate 200 and a curing mechanism.

[0026] The work box body 100 is a frame-shaped structural member surrounded by a plurality of side panels. Usually, the cross section of the work box body 100 is a rectangular structure, that is, the work box body 100 is surrounded by four side panels. The lifting bottom plate 200 is movably arranged in the work box body 100. In actual application, the lifting bottom plate 200 is lifted and lowered in the work box body 100, so that printing work is performed in the work box body 100.

[0027] In an embodiment of the utility model, at least one side panel is provided with a plurality of first air permeable grooves spaced apart from each other. Specifically, a plurality of first air permeable grooves may be spaced apart from each other on one of the side panels, or a plurality of first air permeable grooves may be spaced apart from each other on a plurality of side panels, or a plurality of first air permeable grooves may be spaced apart from each other on all side panels. This can be arranged according to the specific application situation, and the embodiment of the utility model does not impose any limitation on this.

[0028] The first ventilating groove is covered with a ventilating net 110, that is, the first ventilating groove may be an opening, and then the ventilating net 110 is arranged on the opening, so that the first ventilating groove is covered by the ventilating net 110. During the installation process, the ventilating net 110 may be arranged on the first ventilating groove by bonding, clamping or threading; at the same time, the ventilating net 110 may be flush with the inner side surface of the side plate, so as to prevent sand accumulation during the printing process.

[0029] The curing mechanism includes a sealing cover 310 and an air supply device, wherein the sealing cover 310 is disposed on the outer side of the side plate, one end of the air supply device is connected to the sealing cover 310, and the air supply device is connected to the first air permeable groove through the sealing cover 310. Specifically, in the above case, the sealing cover 310 is equivalent to being disposed on the first air permeable groove, so that the air supply device can supply air to the first air permeable groove through the sealing cover 310. At the same time, since the air permeable net 110 is disposed on the first air permeable groove, it can not only supply air to the working box body 100, but also block the printing sand to prevent the sand from entering the sealing cover 310.

[0030] In the specific working process, when printing is completed, the air supply device can supply air to the working box body 100 through the sealing cover 310 and the first air permeable groove. The air supply device can be a positive pressure device or a negative pressure device, so that the water vapor generated in the working box body 100 can be sucked out, or the moisture in the working box body 100 can be air-dried to ensure the dryness of the working box body 100. Optionally, the application scenario of the above method can be in the curing process of the sand mold, so that the moisture generated by the curing can be sucked out or air-dried.

[0031] From the above content, it can be known that in a work box assembly for 3D printing disclosed in an embodiment of the utility model, by opening air holes in the side panels of the work box body 100, and then increasing negative pressure or positive pressure in the air holes, the moisture generated in the work box body 100 can be better handled with the help of air flow, so that the sand core is easier to solidify and the sand core curing efficiency is improved. In this way, many problems such as the difficulty in curing, uneven curing, low curing efficiency, and inconsistency in product size caused by ink seepage due to long-term non-baking of products with existing phenolic binders, inorganic binders, and metal printing binders are overcome, and the problem that phenolic binders, inorganic binders, and metal printing binders cannot be promoted and applied is solved, and the hardening speed of the product is effectively improved, the product is fully cured, and the product with uniform size and quality is better obtained.

[0032] In the embodiment of the utility model, the first vent groove can be a rectangular hole, and the center line of the rectangular hole can be non-perpendicular or non-parallel to the plane where the lifting bottom plate 200 is located. In layman's terms, the first vent groove is an inclined groove opened on the side plate, that is, there is a certain angle between the first vent groove and the lifting bottom plate 200, and this method can ensure the strength of the side plate. Of course, the first vent groove can also be circular or other shapes.

[0033] In an optional embodiment, the side panel can be a double-layer panel. In this case, the outer panel of the side panel can be a carbon steel plate to ensure the strength of the working box body 100, and the outer panel can be a stainless steel plate to prevent the working box body 100 from rusting and ensure the service life. In the embodiment of the utility model, the inner panel of the side panel can be provided with the first air permeable groove described above, the outer panel of the side panel can be provided with a plurality of air holes opposite to the first air permeable groove, and the sealing cover 310 can be covered on the air holes. In this case, the gas delivered by the sealing cover 310 acts on the working box body 100 through the air holes and the air permeable net 110 on the first air permeable groove in turn. The above method can not only achieve a specific air-drying effect, but also ensure the strength of the side panel, and at the same time, the air permeable net 110 can be supported by the outer panel to prevent the air permeable net 110 from being sunken and affecting the exhaust or air-drying effect.

[0034] In another optional embodiment, the side plate can be a double-layer plate, and the inner plate of the side plate can be provided with the first ventilation groove described above, and the outer plate of the side plate can be provided with a second ventilation groove, and the second ventilation groove can be arranged opposite to at least two first ventilation grooves, that is, the length of the second ventilation groove can be greater than the distance between at least two second ventilation grooves and opposite to each other, and the sealing cover 310 is arranged on the second ventilation groove. In this case, the air pressure delivered by the sealing cover 310 can act on at least two first ventilation grooves at the same time through the second ventilation groove, so as to better realize air pressure control, thereby better facilitating air flow, and improving the curing effect of the sand mold.

[0035] In the embodiment disclosed in the utility model, the sealing cover 310 can be an integral unit. Optionally, a plurality of first air-permeable grooves can be distributed in a matrix on the side plate. The number of sealing covers 310 can be multiple, and each sealing cover 310 can be arranged on each row or column of first air-permeable grooves. Figure 1 A plurality of sealing covers 310 may be used to cover the plurality of first air permeable grooves. This method is not only convenient for the overall structural layout of the working box assembly, but also the dispersed plurality of sealing covers 310 can provide an air pressure that meets the use requirements, so as to better realize the exhaust and air drying effects in the working box body 100, so as to achieve a better sand mold curing effect.

[0036] In another optional embodiment, the number of sealing covers 310 can be multiple, and each sealing cover 310 can be correspondingly set on each first air permeable groove. In this case, each first air permeable groove corresponds to a sealing cover, which not only facilitates gas flow, but also facilitates the control of air pressure, thereby facilitating sand mold curing. Of course, the above embodiments can also be used in combination, that is, designed according to different scenarios.

[0037] In the embodiment of the utility model, two adjacent sealing covers 310 can be connected by a pipeline, and the air supply device can be connected to one of the sealing covers 310. In this case, the air supply device can supply air to all the sealing covers 310 by being connected to one sealing cover 310, thereby improving the equipment layout while also solving the cost problem and facilitating better control of the air pressure.

[0038] Of course, in the air supply device, negative pressure or positive pressure can be connected through the air pipe joint. Each line has a valve to control the opening and closing. A pressure gauge is connected behind the valve to detect the cavity pressure. Positive pressure or negative pressure comes from the air storage tank. The valve and the pressure gauge are connected to the control system. The control system controls the overall cavity pressure. The cavity pressure can change according to the size and shape of the printed object. The final airflow will take away the moisture of the printed object to make it dry, but it cannot affect the normal molding of the sand, so the gas flow rate is best between a certain section.

[0039] In the work box assembly disclosed in the present utility model, the lifting bottom plate 200 can also be set as a structural member with a ventilation function. Specifically, the lifting bottom plate 200 can include a bottom plate body 210 and a ventilation plate. The ventilation plate can cover the bottom plate body 210, that is, the lifting bottom plate 200 is a double-layer structural member, and a ventilation cavity 211 can be opened on the side of the bottom plate body 210 facing the ventilation plate, and the air supply device can be connected to the ventilation cavity 211. In the specific working process, the air supply device first delivers air pressure to the ventilation cavity 211, and then delivers air pressure to the working surface of the lifting bottom plate 200 through the ventilation plate covered on the ventilation cavity 211, so as to exhaust or air-dry the sand mold on the working surface of the lifting bottom plate 200 to facilitate the solidification of the sand mold. In the above case, the lifting base plate 200 of this structure can not only exhaust or air dry the sand mold during printing to facilitate the solidification of the sand mold, but also exhaust or air dry the sand mold after printing to facilitate the solidification of the sand mold.

[0040] Of course, a sealing layer may be provided between the bottom plate body 210 and the air-permeable plate to prevent air pressure leakage from affecting the exhaust or air-drying effect on the sand mold.

[0041] In an optional embodiment, the air permeable plate may include a connected reinforcement layer 220 and an air permeable layer 230, and the reinforcement layer 220 may be located between the air permeable layer 230 and the air permeable cavity 211. In this case, the air permeable layer 230 may better meet the air permeability effect, and the reinforcement layer 220 may be used to support the air permeable layer 230 to prevent part of the air permeable layer 230 from being sunken into the air permeable cavity 211 to affect the air permeability effect. Of course, air holes may be provided on the reinforcement layer to facilitate gas circulation.

[0042] Furthermore, the air-permeable cavity 211 may include a plurality of interconnected air-permeable strip grooves, and the air supply device may be connected to one of the air-permeable strip grooves, which not only facilitates the circulation of air pressure but also ensures the strength of the lifting base plate 200 .

[0043] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A working box assembly for 3D printing equipment, characterized in that: The invention comprises a working box body (100), a lifting bottom plate (200) and a curing mechanism, wherein the working box body (100) is a frame-shaped structural member surrounded by a plurality of side plates, the lifting bottom plate (200) is movably arranged in the working box body (100), a plurality of first air permeable grooves are arranged at intervals on at least one of the side plates, and an air permeable net (110) is laid on the first air permeable grooves, and the curing mechanism comprises a sealing cover (310) and an air supply device, wherein the sealing cover (310) is arranged on the outer side surface of the side plate, one end of the air supply device is connected to the sealing cover (310), and the air supply device is connected to the first air permeable grooves through the sealing cover (310).

2. The working box assembly according to claim 1, characterized in that: The first ventilation groove is a rectangular hole, and the center line of the rectangular hole is not perpendicular or parallel to the plane where the lifting bottom plate (200) is located.

3. The working box assembly according to claim 1, characterized in that: The side plate is a double-layer plate, and the inner plate of the side plate is provided with the first ventilation groove, and the outer plate of the side plate is provided with a plurality of ventilation holes opposite to the first ventilation groove, and the sealing cover (310) is covered on the ventilation holes.

4. The working box assembly according to claim 1, characterized in that: The side plate is a double-layer plate, and the inner plate of the side plate is provided with the first ventilation groove, and the outer plate of the side plate is provided with a second ventilation groove, the second ventilation groove is arranged opposite to at least two of the first ventilation grooves, and the sealing cover (310) is covered on the second ventilation groove.

5. The working box assembly according to claim 1, characterized in that: The plurality of first ventilation grooves are distributed in a matrix on the side plate, the number of the sealing covers (310) is multiple, and each sealing cover (310) is arranged on each row or column of the first ventilation grooves.

6. The working box assembly according to claim 1, characterized in that: There are a plurality of sealing covers (310), and each sealing cover (310) is correspondingly disposed on each of the first air permeable grooves.

7. The working box assembly according to claim 5 or 6, characterized in that: Two adjacent sealing covers (310) are connected via a pipeline, and the air supply device is connected to one of the sealing covers (310).

8. The working box assembly according to claim 1, characterized in that: The lifting base plate (200) comprises a base plate body (210) and a breathable plate, wherein the breathable plate covers the base plate body (210), and a breathable cavity (211) is provided on one side of the base plate body (210) facing the breathable plate, and the air supply device is in communication with the breathable cavity (211).

9. The working box assembly according to claim 8, characterized in that: The air-permeable plate comprises a connected reinforcement layer (220) and an air-permeable layer (230), wherein the reinforcement layer (220) is located between the air-permeable layer (230) and the air-permeable cavity (211).

10. The working box assembly according to claim 8, characterized in that: The air-permeable cavity (211) comprises a plurality of interconnected air-permeable strip grooves, and the air supply device is connected to one of the air-permeable strip grooves.

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