Ceramic sintering mold

Abstract

The utility model belongs to the technical field of ceramic sintering, and particularly relates to a ceramic sintering die which comprises a ceramic forming base die, a ceramic powder extrusion bottom die and a ceramic powder extrusion top die, a plurality of adjustable male dies are inserted into the ceramic powder extrusion bottom die in a penetrating mode, and the outer walls of the adjustable male dies are all fixedly connected with adjusting baffles. The heights of the multiple adjusting baffles are sequentially increased, a downward-pressing adjusting plate is arranged in the ceramic forming base mold, and the bottom end of the downward-pressing adjusting plate is fixedly connected with a [-shaped upward-lifting adjusting plate. The adjustable male dies and the ceramic powder extrusion bottom die are separately arranged, so that the ceramic powder extrusion bottom die and the adjustable male dies can be demoulded step by step, a blank body is prevented from bearing stress in the inner direction and the outer direction at the same time, and the multiple adjustable male dies can be sequentially driven to move by means of an adjusting baffle through downward movement of a downward-pressing adjusting plate and a [-shaped upward-lifting adjusting plate. Therefore, after a ceramic blank is formed, the adjustable male dies can be gradually demolded, and damage to the ceramic blank during die demolding is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ceramic sintering, and particularly relates to a ceramic sintering mold. Background Art

[0002] When sintering ceramic components, it is necessary to extrude the ceramic raw materials into a mold. During the process, a ceramic sintering mold is required. Currently, when using a ceramic sintering mold for dry powder pressing forming, powder is added to the mold material bin by a filling device, and the powder is extruded and formed by the cooperation of the upper concave mold and the lower convex mold. Subsequently, after the upper concave mold is demolded, the lower convex mold drives the ceramic blank to move upward to complete the demolding work. However, in the actual production process, a large number of ceramic blanks have through holes in the center. The through holes are formed by extruding the powder with the corresponding structures in the lower convex mold and the upper concave mold. During the demolding process of the lower convex mold, there is a fitting tolerance gap between the protruding structure in the lower convex mold and the inner wall of the mold material bin. Both the protruding structure in the lower convex mold and the inner wall of the mold material bin will apply stress to the blank. The blank will be subjected to internal and external stress at the same time. The unsintered blank is still a powder aggregate and has not formed a solid overall structure. Some blanks will be damaged when subjected to stress. Content of the Utility Model

[0003] The utility model provides a ceramic sintering mold, which has the characteristics of reducing the stress acting on the ceramic blank during mold demolding to improve the forming effect of the ceramic blank.

[0004] The utility model provides the following technical solution: a ceramic sintering mold, including a ceramic forming base mold, a ceramic powder extrusion bottom mold, and a ceramic powder extrusion top mold. A number of adjustable punches are inserted into the ceramic powder extrusion bottom mold. Adjusting baffles are fixedly connected to the outer walls of the number of adjustable punches, and the heights of the number of adjusting baffles increase in sequence. A downward pressure adjusting plate is arranged in the ceramic forming base mold. The bottom end of the downward pressure adjusting plate is fixedly connected with a U-shaped upward lifting adjusting plate, and the U-shaped upward lifting adjusting plate is slidably connected with the ceramic forming base mold.

[0005] Wherein, a让位槽 (retaining groove) is opened in the ceramic forming base mold, and a limiting sliding groove is opened on the inner wall of the retaining groove.

[0006] Wherein, a让位孔 (retaining hole) corresponding to the size of the adjustable punch is opened at the top end of the downward pressure adjusting plate. The adjustable punch passes through the retaining hole, and the adjusting baffle is located below the downward pressure adjusting plate.

[0007] Wherein, a telescopic rod is fixedly connected to the bottom end of the U-shaped upward lifting adjusting plate, and a limiting sliding block is fixedly connected to the side wall of the U-shaped upward lifting adjusting plate. The limiting sliding block slides in the limiting sliding groove.

[0008] Wherein, a damping washer is embedded in the inner wall at the top end of the retaining groove, and the damping washer is sleeved on the outer wall of the adjustable punch.

[0009] The beneficial effects of the present utility model are as follows: The adjustable punch and the ceramic powder extrusion bottom die are separately arranged, so that the ceramic powder extrusion bottom die and the adjustable punch can be demolded step by step, avoiding the embryo body from simultaneously bearing stresses in two directions inside and outside. Moreover, by pressing down the adjustment plate and moving down the U-shaped lifting adjustment plate, multiple adjustable punches can be driven to move in sequence with the help of the adjustment baffle, so that after the ceramic embryo body is formed, the multiple adjustable punches can be gradually demolded, further reducing the stress on the ceramic embryo body at the same time during the demolding process, reducing the damage to the ceramic embryo body when the mold is demolded, and improving the forming effect of the ceramic embryo body.

[0010] Parts not involved in this device are the same as those in the prior art or can be implemented using the prior art. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is Figure 1 an enlarged view of part A in

[0013] Figure 3 is a schematic diagram of the motion state of the adjustable punch in the present utility model.

[0014] In the figure: 1, ceramic forming base mold; 11, relief groove; 12, limit sliding groove; 2, ceramic powder extrusion bottom mold; 3, ceramic powder extrusion top mold; 4, adjustable punch; 41, adjustment baffle; 5, downward pressure adjustment plate; 51, U-shaped upward adjustment plate; 52, relief hole; 53, telescopic rod; 54, limit slider; 6, damping washer. Specific Embodiment

[0015] Please refer to Figure 1-Figure 3 , the present utility model provides the following technical solutions: A ceramic sintering mold includes a ceramic forming base mold 1, a ceramic powder extrusion bottom mold 2, and a ceramic powder extrusion top mold 3. A plurality of adjustable punches 4 are inserted into the ceramic powder extrusion bottom mold 2. Adjustment baffles 41 are fixedly connected to the outer walls of the plurality of adjustable punches 4, and the heights of the plurality of adjustment baffles 41 increase in sequence. A downward pressure adjustment plate 5 is arranged in the ceramic forming base mold 1. The bottom end of the downward pressure adjustment plate 5 is fixedly connected to a U-shaped upward adjustment plate 51, and the U-shaped upward adjustment plate 51 is slidably connected to the ceramic forming base mold 1.

[0016] In this implementation: When pressing and forming the ceramic, the downward pressing adjustment plate 5 and the U-shaped upward lifting adjustment plate 51 move upward. The U-shaped upward lifting adjustment plate 51 pushes multiple adjustable punches 4 to move upward. The top ends of the adjustable punches 4 extend out of the ceramic powder extrusion bottom die 2. Subsequently, the feeding mechanism adds raw materials to the top end of the ceramic powder extrusion bottom die 2. The ceramic powder extrusion top die 3, the ceramic powder extrusion bottom die 2, and the adjustable punches 4 cooperate to extrude and form the raw materials. When demolding, the ceramic powder extrusion top die 3 first moves upward to separate from the green body. Subsequently, the downward pressing adjustment plate 5 and the U-shaped upward lifting adjustment plate 51 move downward. After the downward pressing adjustment plate 5 contacts the adjustment baffle 41, it drives the adjustment baffle 41 to move downward to drive the adjustable punch 4 to move downward. Since the heights of the adjustment baffles 41 are different, after one of the adjustable punches 4 separates from the green body, the downward pressing adjustment plate 5 contacts another adjustment baffle 41, driving another adjustable punch 4 to demold, realizing the separate demolding of multiple adjustable punches 4. After all the multiple adjustable punches 4 have completed demolding, the ceramic powder extrusion bottom die 2 moves upward under the action of the driving device to drive the green body to separate from the top groove of the ceramic forming base die 1. The adjustable punch 4 and the ceramic powder extrusion bottom die 2 are separately arranged, enabling the ceramic forming base die 1 and the ceramic powder extrusion bottom die 2 located outside the green body and the adjustable punch 4 located inside the green body to demold in steps, avoiding the green body from simultaneously bearing stresses in two directions inside and outside. Moreover, by moving the downward pressing adjustment plate 5 and the U-shaped upward lifting adjustment plate 51 downward, the adjustment baffle 41 can be used to drive multiple adjustable punches 4 to move in sequence, so that after the ceramic green body is formed, the multiple adjustable punches 4 can be gradually demolded, further reducing the stress on the ceramic green body at the same time during the demolding process, reducing the damage to the ceramic green body during mold demolding, and improving the forming effect of the ceramic green body.

[0017] A relief groove 11 is provided in the ceramic forming base die 1, and a limiting sliding groove 12 is provided on the inner wall of the relief groove 11. By providing the relief groove 11, a accommodating space can be provided for the adjustable punch 4 and the downward pressing adjustment plate 5, enabling the downward pressing adjustment plate 5 and the U-shaped upward lifting adjustment plate 51 to slide inside the ceramic forming base die 1. At the same time, the width of the relief groove 11 corresponds to the widths of the downward pressing adjustment plate 5 and the U-shaped upward lifting adjustment plate 51. With the cooperation of the inner wall of the relief groove 11 and the limiting sliding groove 12, the downward pressing adjustment plate 5 and the U-shaped upward lifting adjustment plate 51 can be limited and guided.

[0018] A relief hole 52 corresponding to the size of the adjustable punch 4 is provided at the top of the downward pressure adjusting plate 5. The adjustable punch 4 passes through the relief hole 52, and the adjusting baffle 41 is located below the downward pressure adjusting plate 5. By providing the relief hole 52, the adjustable punch 4 can be relieved, so that the adjustable punch 4 can pass through the downward pressure adjusting plate 5 and extend between the downward pressure adjusting plate 5 and the U-shaped upward adjusting plate 51. And the diameter of the relief hole 52 is larger than the diameter of the adjustable punch 4, avoiding the frictional force generated by the contact between the downward pressure adjusting plate 5 and the adjustable punch 4 from driving the movement of the adjustable punch 4. The adjusting baffle 41 is located between the downward pressure adjusting plate 5 and the U-shaped upward adjusting plate 51. Thus, when the downward pressure adjusting plate 5 and the U-shaped upward adjusting plate 51 move upward, the U-shaped upward adjusting plate 51 can push the bottom end of the adjustable punch 4 to drive the adjustable punch 4 to move upward. When the downward pressure adjusting plate 5 and the U-shaped upward adjusting plate 51 move downward, the downward pressure adjusting plate 5 gradually contacts the adjusting baffle 41 on different adjustable punches 4, and then the downward pressure adjusting plate 5 presses the adjusting baffle 41 to drive the adjustable punch 4 to move downward.

[0019] A telescopic rod 53 is fixedly connected to the bottom end of the U-shaped upward adjusting plate 51, and a limit slider 54 is fixedly connected to the side wall of the U-shaped upward adjusting plate 51. The limit slider 54 slides in the limit chute 12. By setting the telescopic rod 53 to output and retract, the U-shaped upward adjusting plate 51 can be driven to move up and down, so as to drive the downward pressure adjusting plate 5 and the U-shaped upward adjusting plate 51 to move up and down as a whole. In the actual use process, the telescopic rod 53 is connected to the controller by signal, and the controller controls the output and retraction of the telescopic rod 53. By setting the limit slider 54 to slide in the limit chute 12, the U-shaped upward adjusting plate 51 can be guided, and at the same time, the deviation of the moving position of the U-shaped upward adjusting plate 51 is avoided.

[0020] A damping washer 6 is embedded in the inner wall of the top end of the relief groove 11. The damping washer 6 is sleeved on the outer wall of the adjustable punch 4. By providing the damping washer 6, the adjustable punch 4 can be supported. When the adjustable punch 4 is pushed upward by the U-shaped upward adjusting plate 51, the frictional force between the damping washer 6 and the outer wall of the adjustable punch 4 can limit the free sliding of the adjustable punch 4, avoiding the adjustable punch 4 from sliding downward under the action of gravity, so that the adjustable punch 4 will only move downward under the pushing action of the downward pressure adjusting plate 5.

[0021] Working principle and usage process of the utility model: When pressing and forming ceramics, the lower pressing adjusting plate 5 and the U-shaped upper lifting adjusting plate 51 move upward. The U-shaped upper lifting adjusting plate 51 pushes multiple adjustable punches 4 to move upward. The top ends of the adjustable punches 4 extend out to extrude the bottom die 2 of the ceramic powder. Subsequently, the feeding mechanism adds raw materials to the top end of the bottom die 2 of the ceramic powder. The top die 3 for extruding ceramic powder and the bottom die 2 for extruding ceramic powder cooperate with the adjustable punches 4 to extrude and form the raw materials. When demolding, the top die 3 for extruding ceramic powder first moves upward to separate from the embryo. Subsequently, the lower pressing adjusting plate 5 and the U-shaped upper lifting adjusting plate 51 move downward. After the lower pressing adjusting plate 5 contacts the adjusting baffle 41, it drives the adjusting baffle 41 to move downward to drive the adjustable punches 4 to move downward. Since the heights of the adjusting baffles 41 are different, after one of the adjustable punches 4 separates from the embryo, the lower pressing adjusting plate 5 contacts another adjusting baffle 41, driving another adjustable punch 4 to demold, realizing the separate demolding of multiple adjustable punches 4. After all the multiple adjustable punches 4 have completed demolding, the bottom die 2 for extruding ceramic powder moves upward under the action of the driving device to drive the embryo to separate from the top groove of the ceramic forming base die 1. The ceramic forming base die 1 and the bottom die 2 for extruding ceramic powder located outside the embryo and the adjustable punches 4 located inside the embryo can demold step by step, avoiding the embryo from simultaneously bearing stresses in two directions inside and outside. Moreover, the multiple adjustable punches 4 demold step by step, further reducing the stress on the ceramic embryo at the same time during the demolding process.

Claims

1. A ceramic sintering mold, comprising a ceramic forming base mold (1), a ceramic powder extrusion bottom mold (2) and a ceramic powder extrusion top mold (3), characterized in that: 若干可调节凸模(4)穿插在所述陶瓷粉挤压底模(2)内,若干所述可调节凸模(4)的外壁均固定连接有调节挡板(41),若干所述调节挡板(41)的高度依次增加,所述陶瓷成型基模(1)内设有下压调节板(5),所述下压调节板(5)的底端固定连接有匚形上抬调节板(51),所述匚形上抬调节板(51)与所述陶瓷成型基模(1)滑动连接。 2. A ceramic sintering mold according to claim 1, characterized in that: 所述陶瓷成型基模(1)内开设有让位槽(11),所述让位槽(11)的内壁开设有限位滑槽(12)。 3. A ceramic sintering mold according to claim 1, characterized in that: 所述下压调节板(5)的顶端开设有与所述可调节凸模(4)尺寸对应的让位孔(52),所述可调节凸模(4)穿过所述让位孔(52),所述调节挡板(41)位于所述下压调节板(5)下方。 4. A ceramic sintering mold according to claim 2, characterized in that: 所述匚形上抬调节板(51)的底端固定连接有伸缩杆(53),所述匚形上抬调节板(51)的侧壁固定连接有限位滑块(54),所述限位滑块(54)在所述限位滑槽(12)内滑动。 5. A ceramic sintering mold according to claim 2, characterized in that: 所述让位槽(11)的顶端内壁嵌设有阻尼垫圈(6),所述阻尼垫圈(6)套设在所述可调节凸模(4)的外壁。

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