Thermal densification mold for saggar with downward opening

Abstract

The sagger thermal densification die with the downward opening sequentially comprises an upper male die, a middle die, an edge pressing die and a lower male die from top to bottom, and the middle die and the edge pressing die are each of a hollow inner cavity structure; the inner side wall of the middle die can move relative to the outer side wall of the upper male die and the outer side wall of the blank pressing die at the same time, the inner side wall of the blank pressing die can move relative to the lower male die, the first end of the lower male die can penetrate through the blank pressing die to enter an inner cavity of the middle die, and a saggar-shaped cavity is formed when the upper male die, the middle die, the blank pressing die and the lower male die move to set positions. Products with different bottom thicknesses and different heights can be produced by adjusting design parameters, and multiple purposes of one mold are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal densification sagger design, in particular to a thermal densification mould for a sagger with an opening downward. Background Art

[0002] Square sagger is a high-temperature container specially used for smelting, with good thermal conductivity and thermal stability, which can increase the burning capacity, ensure that the products will not stick together and improve the yield rate, especially in the purification of positive and negative electrode materials of new energy batteries.

[0003] At present, the molded sagger production mold can only produce products of a single height. Once the height of the same product is different, it is necessary to develop the mold, which increases investment and maintenance costs. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a downward-opening sagger heat densification mold, which realizes multiple uses of one mold.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a downward-opening sagger heat densification mold, which comprises, from top to bottom, an upper punch, a middle mold, a pressure die and a lower punch, wherein both the middle mold and the pressure die are hollow inner cavity structures; The inner side wall of the middle die can move relative to the outer side wall of the upper punch and the outer side wall of the margin die at the same time, the inner side wall of the margin die can move relative to the lower punch, the first end of the lower punch can pass through the margin die and enter the inner cavity of the middle die, and the upper punch, the middle die, the margin die and the lower punch are moved to the set position to form a sagger-shaped cavity.

[0006] The beneficial effects of the present invention are as follows: when the upper punch, the middle die, the edge holding die and the lower punch move to the set position, a sagger-shaped cavity is formed. At this time, the first end of the lower punch can move relative to the inner side wall of the edge holding die, so as to adjust the distance between the first end of the lower punch and the upper punch, that is, the bottom thickness of the different saggers; at the same time, the side wall of the edge holding die is clamped between the first end of the lower punch and the inner side wall of the middle die, and the different heights of the sagger side walls are controlled by relative movement, so that products with different bottom thicknesses and different heights can be produced, realizing multiple uses of one mold, reducing the investment amount of the mold, and reducing the production cost and maintenance cost.

[0007] Optionally, the upper punch, the middle die, the edge holding die and the lower punch are all heat-conducting metal parts, and a plurality of heating components are arranged around the cavity in the upper punch, the middle die and the lower punch.

[0008] Optionally, the heating assembly includes an electric heating rod and an electric heating sheet, the electric heating rod is evenly distributed in the middle mold and the first end of the lower punch, and a plurality of the electric heating sheets are evenly distributed in an end of the upper punch close to the middle mold.

[0009] Optionally, the middle mold has a hollow inner cavity and a U-shaped outer structure.

[0010] Optionally, the edge pressing die is provided with a base extending outwards.

[0011] Optionally, the lower punch comprises an annular flange arranged in a middle region.

[0012] Optionally, the wall thickness of the top of the inner cavity of the edge holding die is greater than the wall thickness at other positions, and the first end of the lower punch, the top of the inner cavity of the edge holding die and the inner side wall of the middle die are precisely matched. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of a downward-opening sagger thermal densification mold according to an embodiment of the present invention; Figure 2 It is a cross-sectional schematic diagram of a downward-opening sagger thermal densification mold according to an embodiment of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the middle A area; Figure 4 for Figure 3 A magnified schematic diagram of the lower left center area; Figure 5 It is a three-dimensional schematic diagram of a special heat densification machine used in conjunction with the downward-opening sagger heat densification mold of the present embodiment.

[0014] Description of reference numerals: 1. Upper punch; 11. Electric heater; 2. Middle mold; 3. Edge pressing die; 31. Base; 4. lower punch; 41. first end; 42. electric heating rod; 43. annular flange; 5. Cavity; 100. Thermal densification machine; 101. Support seat; 102. First movable support; 103. Second movable support; 1031. First through hole; 1032. Step surface; 104. Third movable support; 1041. Second through hole; 105. Fixed support; 106. Main power mechanism; 107. First auxiliary power mechanism; 108. Second auxiliary power mechanism; 109. Connecting guide column; 110. Control system. DETAILED DESCRIPTION

[0015] 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 clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0016] Embodiment 1 Please refer to Figures 1 to 4 , a downward opening sagger heat densification mold, which includes an upper punch 1, a middle mold 2, a blanking mold 3 and a lower punch 4 from top to bottom. The upper punch 1, the middle mold 2, the blanking mold 3 and the lower punch 4 are all heat-conducting metal parts, and a plurality of heating components are arranged around the cavity 5 in the upper punch 1, the middle mold 2 and the lower punch 4. Figure 3 As shown, the heating assembly includes an electric heating rod 42 and an electric heating plate 11. The electric heating rod 42 is evenly distributed in the first end 41 of the middle mold 2 and the lower punch 4. There are multiple electric heating plates 11 evenly distributed in the end of the upper punch 1 close to the middle mold 2, ensuring uniform heating in the cavity 5.

[0017] In this embodiment, the heat-conducting metal member is made of high-quality mold steel.

[0018] Reference Figure 1 and Figure 2 It can be seen that the middle mold 2 has a hollow inner cavity and a U-shaped outer structure.

[0019] Reference Figure 1 and Figure 2 It can be seen that the edge pressing die 3 is a hollow inner cavity structure as a whole, and is provided with a base 31 extending outward. Figure 4 It can be seen that the wall thickness of the top of the inner cavity of the edge holder die 3 is greater than the wall thickness at other positions, and the first end 41 of the lower punch 4, the top of the inner cavity of the edge holder die 3 and the inner side wall of the middle die 2 are precisely matched, so that the movement of the edge holder die 3 between the first end 41 of the lower punch 4 and the inner side wall of the middle die 2 is only the inner cavity top pressure, wherein the inner cavity top pressure is a structural abbreviation that applies an ejection force to the inside of the cavity 5 to ensure that the product can be demolded smoothly while maintaining unchanged strength.

[0020] Reference Figure 1 and Figure 2 It can be seen that the lower punch 4 includes a first end 41 close to the upper punch 1 and an annular flange 43 arranged in the middle area.

[0021] Combination Figures 1 to 3It can be seen that the inner side wall of the middle die 2 can move relative to the outer side wall of the upper punch 1 and the outer side wall of the blanking die 3 at the same time, the inner side wall of the blanking die 3 can move relative to the lower punch 4, the first end 41 of the lower punch 4 can pass through the blanking die 3 and enter the inner cavity of the middle die 2, and the upper punch 1 forms a sagger-shaped cavity 5 when the inner cavity of the middle die 2 moves and the inner cavity of the blanking die 3 moves upward to the set position through the outer side wall of the lower punch 4. Among them, the first end 41 of the lower punch 4 can move relative to the inner side wall of the blanking die 3, so as to adjust the distance between the first end 41 of the lower punch 4 and the upper punch 1, and obtain different bottom thicknesses of the cavity 5; at the same time, the side wall of the blanking die 3 is clamped between the first end 41 of the lower punch 4 and the inner side wall of the middle die 2, and the different side wall heights of the cavity 5 are controlled by relative movement, so that products with different bottom thicknesses and different heights can be produced, that is, one mold is used for multiple purposes, the investment amount of the mold is reduced, and the production cost and maintenance cost are reduced.

[0022] Therefore, in order to more clearly understand how the downward opening sagger heat densification mold in this embodiment realizes the production of saggers, this embodiment also introduces a heat densification machine 100 used in conjunction with this embodiment. Figure 5 It includes a control system 110, a support base 101, a first movable support 102, a second movable support 103, a third movable support 104, a fixed support 105, a main power mechanism 106, a first auxiliary power mechanism 107, a second auxiliary power mechanism 108, and a guide column assembly connecting the first movable support 102, the second movable support 103, the third movable support 104 and the fixed support 105.

[0023] Among them, the main power mechanism 106 and the first auxiliary power mechanism 107 are both located on the support seat 101, and the second auxiliary power mechanism 108 is located on the first movable support 102. The main power mechanism 106 is connected to the first movable support 102, the first auxiliary power mechanism 107 is connected to the second movable support 103, and the second auxiliary power mechanism 108 is connected to the third movable support 104. Specifically, the piston of the main power mechanism 106 is connected to the bottom of the first movable support 102. The driving rod of the first auxiliary power mechanism 107 extends from two opposite sides of the first movable support 102 to the bottom of the second movable support 103. At this time, there are avoidance openings on the two opposite sides of the first movable support 102 so that the driving rod of the first auxiliary power mechanism 107 can support the bottom of the second movable support 103. The driving rod of the second auxiliary power mechanism 108 extends from the other two opposite sides of the first movable support 102 to the bottom of the third movable support 104, and at this time, the driving rod passes through the second movable support 103 to support the bottom of the second movable support 103. Among them, the main power mechanism 106, the first auxiliary power mechanism 107 and the second auxiliary power mechanism 108 are all hydraulic mechanisms. Specifically, the main power mechanism 106, the first auxiliary power mechanism 107 and the second auxiliary power mechanism 108 are 800-ton oil cylinders, 250-ton oil cylinders and 150-ton oil cylinders respectively.

[0024] Among them, the guide column assembly is four connecting guide columns 109, and the four connecting guide columns 109 pass through the four corners of the first movable support 102, the second movable support 103, and the third movable support 104 in sequence and are fixedly connected with the four corners of the fixed support 105 to form an integrated fuselage throughout the entire process. In this way, the first movable support 102, the second movable support 103 and the third movable support 104 slide up and down along the four connecting guide columns 109 driven by their respective power mechanisms.

[0025] The first movable support 102 , the second movable support 103 , the third movable support 104 and the fixed support 105 are adjacent to each other to form an accommodation space. The second movable support 103 is provided with a first through hole 1031 , and the third movable support 104 is provided with a second through hole 1041 .

[0026] Therefore, the downward-opening sagger thermal densification mold and the thermal densification machine 100 of this embodiment are coordinated as follows: the upper punch 1 is fixed on the fixed support 105; the middle mold 2 is hoisted on the second through hole 1041 of the third movable support 104; the second movable support 103 is provided with a surrounding step surface 1032 on the outer side of the first through hole 1031, and the edge holding mold 3 is assembled on the step surface 1032 of the second movable support 103 through the base 31; the lower punch 4 is arranged on the first movable support 102, and its annular flange 43 can be clamped on the bottom surface of the second movable support 103.

[0027] Therefore, the working principle of the downward-opening sagger heat densification mold in this embodiment in conjunction with the corresponding heat densification machine 100 is as follows: (1) Preheating The machine is started without any equipment, and the heating components are controlled to ensure that all parts of the mold reach the specified temperature. (2) Mold filling Adjust the lifting distance of the second auxiliary power mechanism 108 according to product requirements to form a material cavity, and place the raw materials in the material cavity; (3) Close the mold and pressurize The main power mechanism 106 is controlled to rise, driving the first movable support 102 and the lower punch 4 to rise. Since the annular flange 43 is clamped on the bottom surface of the second movable support 103, the second movable support 103 and the edge holding die 3 are also driven to rise. At the same time, since the second auxiliary power mechanism 108 is located on the second movable support 103, the third movable support 104 and the middle die 2 are also driven to rise until they contact the upper punch 1 and start to pressurize the raw material. When the distance between the upper punch 1 and the lower punch 4 reaches the required thickness, the main power mechanism 106 stops rising and continues to maintain the pressure.

[0028] (4) Reverse pressure The first auxiliary power mechanism 107 is controlled to drive the edge pressing die 3 to rise through the second movable support 103, and the four sides of the sagger will be pressed in the reverse direction. When the product height is in place, the first auxiliary power mechanism 107 stops rising and continues to maintain heat and pressure. The raw materials in the cavity 5 are efficiently formed into a perfect sagger under the physical and chemical action.

[0029] Among them, the quality of the sagger can be greatly improved and the service life of the sagger can be extended by adjusting the reverse push force of the edge pressing die 3.

[0030] (5) Pressure relief and demoulding After the specified time is reached, the main power mechanism 106 releases pressure and returns to its position, driving the lower punch 4 to return to its position. The first auxiliary power mechanism 107 releases pressure and returns to its position, driving the edge pressing die 3 to its original position. At this time, the second auxiliary power mechanism 108 pushes the middle die 2 to rise in the opposite direction, and the sagger product is pushed out from the bottom of the middle die 2 by the upper punch 1 in the opposite direction.

[0031] This cycle completes the production of sagger products.

[0032] Therefore, the hot dense graphite sagger developed by the present invention is composed of a mold combined with a special machine and specially formulated raw materials. By heating the raw materials, applying high pressure to the sealed raw materials in both positive and negative directions and other process means, high-quality and high-efficiency high-quality products are obtained. This solution has never existed in the molding industry in the past. It is a radical innovation. It can greatly improve the adaptability and service life of the product. It is an important special machine tool that is indispensable in new energy precursors.

[0033] Therefore, it should be noted that the specific selection of each module in this embodiment is a specific example. In other equivalent embodiments, models that can meet the corresponding functions can be used for replacement.

[0034] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer 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 the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0038] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A downward opening sagger heat densification mold, characterized in that: From top to bottom, it includes an upper punch, a middle die, a blanking die and a lower punch, and the middle die and the blanking die are both hollow inner cavity structures; The inner side wall of the middle die can move relative to the outer side wall of the upper punch and the outer side wall of the margin die at the same time, the inner side wall of the margin die can move relative to the lower punch, the first end of the lower punch can pass through the margin die and enter the inner cavity of the middle die, and the upper punch, the middle die, the margin die and the lower punch are moved to the set position to form a sagger-shaped cavity.

2. The downward opening sagger thermal densification mold according to claim 1, characterized in that: The upper punch, the middle die, the edge-holding die and the lower punch are all heat-conducting metal parts, and a plurality of heating components are arranged around the cavity in the upper punch, the middle die and the lower punch.

3. The downward opening sagger thermal densification mold according to claim 2, characterized in that: The heating assembly includes an electric heating rod and an electric heating sheet. The electric heating rod is evenly distributed in the middle mold and the first end of the lower punch. A plurality of electric heating sheets are evenly distributed in an end of the upper punch close to the middle mold.

4. The downward opening sagger thermal densification mold according to claim 1, characterized in that: The middle mold has a hollow inner cavity and a U-shaped outer structure.

5. The downward opening sagger thermal densification mold according to claim 1, characterized in that: The edge pressing die is provided with a base extending outwards.

6. The downward opening sagger thermal densification mold according to claim 1, characterized in that: The lower punch includes an annular flange disposed in a middle region.

7. The downward-opening sagger thermal densification mold according to any one of claims 1 to 6, characterized in that: The wall thickness of the top of the inner cavity of the edge holding die is greater than the wall thickness at other positions, and the first end of the lower punch, the top of the inner cavity of the edge holding die and the inner side wall of the middle die are precisely matched.

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