Siphon kiln furniture for blank degreasing
By designing a siphon kiln tool with a mixed structure of closed and open holes, the problem of blank powder sticking in ceramic powder injection molding technology is solved, and the effect of reducing raw material powder consumption and simplifying the process flow is achieved, and production is improved Efficiency and cost savings.
Patent Information
- Application Number
- CN202421267541.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-06-05
AI Technical Summary
In ceramic powder injection molding technology, the blank is prone to adhere to siphon powder in the siphon-thermal degreasing process, resulting in an increase in the cleaning process between degreasing and sintering processes, extending the process flow and increasing raw material powder consumption, resulting in waste and cost increase .
A siphon kiln tool for degreasing of blanks is designed, including a chassis, a first suction unit and a second suction unit arranged in sequence from bottom to top, and the suction or Adsorb the binder molecules of the blank and avoids the use of raw material powder as a siphon carrier.
It effectively avoids the surface of the blank, reduces the consumption of raw material powder, simplifies the process flow, improves production efficiency and saves production costs.
Smart Images
Figure CN222514240U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of production equipment, in particular to a siphon kiln used for degreasing blanks. Background Art
[0002] Ceramic powder injection molding technology is an important branch of powder injection molding technology. It is a near-net molding process suitable for the preparation of ceramic parts with complex shapes, which is developed by combining polymer injection molding method with ceramic preparation process. The process flow of this technology is roughly: mixing and kneading - granulation - injection molding - degreasing - sintering.
[0003] In the current technical scheme, the siphon-thermal degreasing process in the ceramic powder injection molding technology often uses raw powder as a siphon carrier, and simulates the capillary action through the pores between the powder particles and the pores on the surface of the powder particles. During the heating process, the binder in the blank is sucked out. The specific operation method is: spread the raw powder of appropriate thickness in the sagger, place the ceramic injection molded blank on the raw powder, and then spread a shallow layer of raw powder on the ceramic injection molded blank. However, the ceramic injection molded blank in the above method will adhere to the siphon powder, and a separate cleaning step must be added between the degreasing and sintering processes, which lengthens the process flow and requires a large amount of raw powder consumption, resulting in raw material waste and increased costs. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, the utility model aims to provide a siphon kiln for degreasing blanks, which can prevent the blanks from sticking powder, reduce the consumption of raw material powder, thereby improving production efficiency and saving production costs.
[0005] To achieve the above-mentioned purpose, an embodiment of the utility model proposes a siphon kiln for degreasing blanks, comprising a bottom plate, a first suction unit and a second suction unit stacked in sequence from bottom to top, the second suction unit comprising a first suction layer and a second suction layer, the upper surface of the first suction layer having at least one workpiece position for placing the blank, the second suction layer can be covered on the first suction layer to seal the workpiece position; the first suction unit and the second suction unit use a mixed structure containing closed pores and open pores to suck or adsorb the binder molecules of the blank.
[0006] According to the embodiment of the utility model, the siphon kiln tool comprises a bottom plate, a first suction unit and a second suction unit which are stacked in sequence from bottom to top, the first suction unit comprises a first suction layer and a second suction layer, the upper surface of the first suction layer has a plurality of workpiece positions for placing the blank, the second suction layer can be covered on the first suction layer to seal the workpiece positions; and the first suction unit and the second suction unit suck or adsorb the binder molecules of the blank through a mixed structure including closed pores and open pores. Thus, there is no need to use raw material powder as a siphon carrier, thereby avoiding the situation where the blank surface is sticky with powder, reducing the consumption of raw material powder, improving production efficiency, and saving production costs.
[0007] In addition, the siphon kiln furniture for degreasing blanks according to the above embodiment of the utility model may also have the following additional technical features:
[0008] Optionally, the first suction unit includes a third suction layer and a fourth suction layer, the third suction layer is stacked on the fourth suction layer, and the pore size of the third suction layer is smaller than the pore size of the fourth suction layer.
[0009] Optionally, the pore size of the first pumping layer is smaller than the pore size of the third pumping layer.
[0010] Optionally, the pore size of the first pumping layer is greater than or equal to 5 μm and less than or equal to 10 μm, the pore size of the third pumping layer is greater than or equal to 10 μm and less than or equal to 30 μm, and the pore size of the fourth pumping layer is greater than or equal to 20 μm and less than or equal to 50 μm.
[0011] Optionally, a filling fiber layer is provided between the third suction layer and the fourth suction layer.
[0012] Optionally, an activated carbon adsorption membrane is provided between the first suction unit and the second suction unit.
[0013] Optionally, a liquid reservoir is provided on the upper surface of the chassis.
[0014] Optionally, four support columns protrude upward from the upper surface of the chassis, and the four support columns are arranged corresponding to four corner points of the chassis.
[0015] Optionally, the thickness of the second pumping layer is greater than or equal to 0.05 mm and less than or equal to 0.2 mm, and the pore size of the second pumping layer is greater than or equal to 5 μm and less than or equal to 45 μm.
[0016] Optionally, there are multiple workpiece positions, and the multiple workpiece positions are arranged in a matrix and distributed on the upper surface of the first suction layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a siphon kiln for degreasing blanks according to an embodiment of the utility model;
[0018] Figure 2 It is a schematic cross-sectional structure diagram of a siphon kiln for degreasing blanks according to one embodiment of the utility model;
[0019] Figure 3 It is a schematic structural diagram of the first pumping layer according to an embodiment of the utility model.
[0020] Explanation of reference numerals: chassis 100 , first suction layer 310 , workpiece position 311 , second suction layer 320 , third suction layer 210 , filling fiber layer 400 , fourth suction layer 220 , activated carbon adsorption membrane 500 . DETAILED DESCRIPTION
[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0022] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0024] Please refer to Figures 1 to 3 The embodiment of the utility model provides a siphon kiln for degreasing blanks, and the siphon kiln comprises a bottom plate 100, a first suction unit and a second suction unit which are stacked in sequence from bottom to top.
[0025] Specifically, the second suction unit includes a first suction layer 310 and a second suction layer 320, and the first suction layer 310 and the second suction layer 320 both have a mixed structure including open holes and closed holes. The first suction layer 310 can be a plate-like structure and have a certain thickness. In one example, the thickness of the first suction layer 310 can be greater than or equal to 5 mm and less than or equal to 10 mm. The upper surface of the first suction layer 310 has at least one workpiece position 311, which can be of any shape, and the size of the workpiece position 311 is adapted to the size of the blank to be placed, so that the blank can be accommodated.
[0026] In one embodiment, the upper surface of the first suction layer 310 may be recessed downward to form the workpiece position 311, which has a certain depth so as to accommodate the blank to prevent the blank from protruding from the workpiece position 311. The second suction layer 320 may be covered on the first suction layer 310 to close the workpiece position 311, and the second suction layer 320 may be used to adsorb small gas molecules that escape upward when the binder is decomposed. In one example, the thickness of the second suction layer 320 is greater than or equal to 0.05 mm and less than or equal to 0.2 mm. In addition, the pore size of the second suction layer 320 is greater than or equal to 5 μm and less than or equal to 45 μm.
[0027] It should be noted that the number of workpiece positions 311 can be one or more. Figure 3 In one example, a plurality of workpiece positions 311 are provided on the upper surface of the first suction layer 310, and the plurality of workpiece positions 311 are arranged in a matrix. Thus, the siphon kiln can degrease a plurality of blanks at the same time, and the plurality of blanks will not affect each other, thereby ensuring the degreasing effect.
[0028] It is worth noting that both the first suction unit and the second suction unit have a mixed structure including closed pores and open pores, so that the first suction unit and the second suction unit can exert capillary action through the mixed structure, so that during the heating process, the first suction unit and the second suction unit can suck or adsorb the adhesive molecules on the blank to achieve removal.
[0029] In one embodiment of the utility model, the first suction unit includes a third suction layer 210 and a fourth suction layer 220. Specifically, the third suction layer 210 and the fourth suction layer 220 both have the mixed structure as described above, the third suction layer 210 is stacked on top of the fourth suction layer 220, and the pore size of the mixed structure of the third suction layer 210 is smaller than the pore size of the mixed structure of the fourth suction layer 220. Thus, along the direction from top to bottom, the closer the pore size is to the blank, the smaller it is, and the farther away from the blank, the larger the pore size is, so that the siphon effect can be ensured, and then the degreasing effect of the blank can be ensured. In one example, the thickness of the third suction layer 210 is greater than or equal to 10㎜ and less than or equal to 15㎜, and the thickness of the fourth suction layer 220 is greater than or equal to 8㎜ and less than or equal to 15㎜.
[0030] In one embodiment, the pore size of the first pumping layer 310 is smaller than the pore size of the third pumping layer 210, so that the pore sizes of the first pumping layer 310, the third pumping layer 210 and the fourth pumping layer 220 gradually increase from top to bottom to form a gradient hole structure, which can ensure that the ceramic injection molded blank does not produce voids to the greatest extent, thereby ensuring the quality of the blank. In one example, the pore size of the first pumping layer 310 is greater than or equal to 5 μm and less than or equal to 10 μm, the pore size of the third pumping layer 210 is greater than or equal to 10 μm and less than or equal to 30 μm, and the pore size of the fourth pumping layer 220 is greater than or equal to 20 μm and less than or equal to 50 μm.
[0031] In one embodiment, a filling fiber layer 400 is arranged between the third suction layer 210 and the fourth suction layer 220. Through the arrangement of the filling fiber layer 400, the buffering, anti-slip and anti-displacement effects between the third suction layer 210 and the fourth suction layer 220 can be achieved, and the filling fiber layer 400 also has a certain adsorption effect.
[0032] In one embodiment, an activated carbon adsorption film 500 is further provided between the first suction unit and the second suction unit. Through the provision of the activated carbon adsorption film 500, the first suction layer 310 and the third suction layer 210 can achieve buffering, anti-skid and anti-shifting effects, and the activated carbon adsorption film 500 also has a certain adsorption effect. In one example, the activated carbon adsorption film 500 may have a certain thickness, so as to better play the role of buffering, anti-skid, anti-shifting and adsorption. The thickness of the activated carbon adsorption film 500 may be greater than or equal to 0.02 mm and less than or equal to 0.2 mm.
[0033] In one embodiment of the present invention, a liquid trough is provided on the upper surface of the bottom plate 100, and the liquid trough can be used to collect the adhesive liquid. In one example, the liquid trough can be formed by a depression in the upper surface of the bottom plate 100. In addition, the bottom center of the liquid trough can be slightly lower than the surroundings thereof, so that the adhesive droplets can be concentrated at the center of the liquid trough for easy removal.
[0034] In one embodiment, the upper surface of the chassis 100 protrudes upward by four support columns, and the four support columns are arranged corresponding to the four corner points of the chassis 100. Thus, a certain gap can be created between the chassis 100 and the fourth suction layer 220 to facilitate air circulation to achieve a better degreasing effect.
[0035] It should be noted that the siphon kiln furniture provided in the embodiment of the utility model can be used alone, and when necessary, multiple siphon kiln furniture can be placed in an overlapping manner to increase the workpiece holding capacity and improve production efficiency.
[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A siphon kiln for degreasing blanks, characterized in that: It includes a chassis, a first suction unit and a second suction unit which are stacked in sequence from bottom to top, the second suction unit includes a first suction layer and a second suction layer, the upper surface of the first suction layer has at least one workpiece position for placing a blank, and the second suction layer can be covered on the first suction layer to seal the workpiece position; the first suction unit and the second suction unit use a mixed structure containing closed cells and open cells to suck or adsorb the adhesive molecules of the blank.
2. The kiln furniture according to claim 1, characterized in that: The first pumping unit includes a third pumping layer and a fourth pumping layer, the third pumping layer is stacked on the fourth pumping layer, and the pore size of the third pumping layer is smaller than the pore size of the fourth pumping layer.
3. The kiln furniture according to claim 2, characterized in that: The pore size of the first pumping layer is smaller than the pore size of the third pumping layer.
4. The kiln furniture according to claim 3, characterized in that: The pore size of the first pumping layer is greater than or equal to 5 μm and less than or equal to 10 μm, the pore size of the third pumping layer is greater than or equal to 10 μm and less than or equal to 30 μm, and the pore size of the fourth pumping layer is greater than or equal to 20 μm and less than or equal to 50 μm.
5. The kiln furniture according to claim 2, characterized in that: A filling fiber layer is arranged between the third suction layer and the fourth suction layer.
6. The kiln furniture according to any one of claims 1 to 5, characterized in that: An activated carbon adsorption membrane is arranged between the first suction unit and the second suction unit.
7. The kiln furniture according to claim 1, characterized in that: The upper surface of the chassis is provided with a liquid placing tank.
8. The kiln furniture according to claim 7, characterized in that: Four support columns protrude upward from the upper surface of the chassis, and the four support columns are arranged corresponding to the four corner points of the chassis.
9. The kiln furniture according to claim 1, characterized in that: The thickness of the second pumping layer is greater than or equal to 0.05 mm and less than or equal to 0.2 mm, and the pore size of the second pumping layer is greater than or equal to 5 μm and less than or equal to 45 μm.
10. The kiln furniture according to claim 1, characterized in that: There are multiple workpiece positions, and the multiple workpiece positions are arranged in a matrix and distributed on the upper surface of the first suction layer.