Demolding method of ceramic pump body

Abstract

The invention relates to a demolding method of a ceramic pump body, which comprises the following steps of: taking a mold, demolding an upper mold, sleeving the upper mold, installing an overturning clamp, hoisting an overturning demolding device, overturning, detaching the overturning clamp and demolding the lower mold to finish demolding of an upper mold and a lower mold of a ceramic pump body blank. In the whole demolding process, the ceramic pump body blank is not deformed or damaged, and it is ensured that the quality of the ceramic pump body blank meets the requirement. Under the condition that the ceramic pump body green body is not damaged, the ceramic pump body green body can be safely taken out of the mold and air-dried, and the production process requirements of the ceramic pump body are met.

Description

Technical Field

[0001] The invention relates to a demoulding method for a ceramic pump body and belongs to the technical field of ceramic centrifugal pump production. Background Art

[0002] A centrifugal pump is a pump that transports liquids by the centrifugal force generated by the rotation of the impeller. It is mainly designed and manufactured with an all-metal structure and is widely used in various industrial fields. Since the all-metal structure of the centrifugal pump, its flow-through parts (front pump cover, impeller, pump body, rear pump cover) are all made of metal, they are easily corroded and worn when transporting highly corrosive or particulate liquid media, resulting in a significant reduction in service life.

[0003] A ceramic centrifugal pump is a centrifugal pump that has a layer of ceramic material on the inner wall of the flow-through parts. The excellent corrosion resistance and wear resistance of ceramic materials are used to greatly improve the service life of the flow-through parts of the centrifugal pump, thereby greatly improving the service life of the centrifugal pump. The ceramic material layer set on the inner wall of the pump body, also known as the ceramic pump body, needs to be made through processes such as ceramic powder, mud making, die casting, drying, and sintering. The prepared ceramic pump body is then installed on the inner wall of the pump body to form a centrifugal pump body with a ceramic protective layer. After the ceramic pump body is die-cast, it is necessary to open the mold and take out the newly formed ceramic pump body blank for drying. Since the newly molded ceramic pump body blank contains a lot of water, the blank itself does not have sufficient structural strength and cannot be directly removed from the mold without damage. Therefore, how to safely remove and dry the ceramic pump body blank without destroying it is a technical problem that needs to be solved in the production process of ceramic pump bodies. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a demoulding method for a ceramic pump body, which can safely remove the ceramic pump body from the mold and dry it without damaging the ceramic pump body, thereby meeting the production process requirements of the ceramic pump body.

[0005] The object of the present invention is achieved in that: A demoulding method for a ceramic pump body comprises the following steps: Step S100, taking out the mold: after the ceramic pump body blank is mold-cast, the mold containing the ceramic blank is taken out from the mold-casting production line and transported to a drying area; Step S200, removing the upper mold: manually removing the upper mold; Step S300, putting on the air-drying mold: manually putting the air-drying mold on the lower mold to replace the original upper mold; Step S400, installing a turning fixture: installing the left and right ends of the drying mold and the lower mold on the turning fixture of the turning and demoulding device; Step S500, lifting and flipping the demoulding device: lifting and flipping the demoulding device, driving the flipping fixture, the drying mold and the lower mold to be lifted off the ground as a whole; Step S600, flipping: rotating the flipping fixture to flip the drying mold and the lower mold 180 degrees as a whole, so that the positions of the drying mold and the lower mold are interchanged; Step S700, removing the flipping fixture: the flipping demoulding device is lowered to make the drying mold touch the ground, and the flipping fixture is removed; Step S800, demoulding: manually removing the lower mold to complete demoulding of the upper mold and the lower mold of the ceramic pump body blank.

[0006] Furthermore, during the process of removing the upper mold in step S200 and removing the lower mold in step S800, the outer shell of the upper mold or the lower mold is manually knocked at multiple points to smoothly remove the ceramic pump body blank from the mold.

[0007] Furthermore, the drying mold cavity and the upper mold cavity are consistent in shape and size.

[0008] Furthermore, in the step S300, before the air-drying mold is fitted onto the lower mold, release powder needs to be sprayed in the air-drying mold cavity.

[0009] Furthermore, the flip demoulding device includes a lifting beam, two vertical arms arranged on the lifting beam, and two sets of flip clamps symmetrically rotatably installed at the lower ends of the two vertical arms; the flip clamp includes an upper clamp block and a lower clamp block that are movably connected to clamp the two ends of the mold; the flip clamp is rotatably arranged on the vertical arm through a pin shaft arranged on the outside of the lower clamp block.

[0010] Furthermore, the central axis of the pin is not coaxial with the central axis of the mold.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention performs non-destructive demolding of the cast ceramic pump body blank and the mold, and then covers the air-drying mold to replace the original upper mold, and then uses a flip demolding device to flip the air-drying mold and the lower mold containing the ceramic pump body blank 180 degrees as a whole, so that the lower mold is on the top, and then non-destructively demolding the lower mold is performed, thereby completing the demolding operation of the ceramic pump body blank; during the demolding process, the ceramic pump body blank that has not formed structural strength is always supported by the lower mold or the air-drying model cavity located below, ensuring that the ceramic blank is not deformed or damaged, thereby meeting the production process requirements of the ceramic pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a flow chart of a demoulding method for a ceramic pump body.

[0013] Figure 2 The present invention is a schematic diagram of a ceramic pump body blank after mold casting according to a demoulding method for a ceramic pump body.

[0014] Figure 3 The present invention is a schematic diagram of a demoulding method for a ceramic pump body after the pump body is put on a drying mold.

[0015] Figure 4 It is a schematic diagram of the state after the flip fixture is installed in the demoulding method of the ceramic pump body of the present invention.

[0016] Figure 5 It is a schematic diagram of a state after a mold is flipped in a demoulding method for a ceramic pump body of the present invention.

[0017] Figure 6 It is a schematic diagram of the state after the flipping fixture is removed in the demoulding method of a ceramic pump body of the present invention.

[0018] in: Lifting beam 1, hanging arm 2, turning fixture 3, upper mold 4, lower mold 5, ceramic pump body blank 6, drying mold 7; An upper clamping block 31 , a lower clamping block 32 , and a pin 33 . DETAILED DESCRIPTION

[0019] See also Figure 1 to Figure 6 The present invention relates to a demoulding method for a ceramic pump body, comprising the following steps: Step S100, taking out the mold: after the ceramic pump body blank is molded, the mold containing the ceramic blank is taken out from the mold casting production line and transported to a drying area; see Figure 2 The mold is divided into an upper mold 4 and a lower mold 5, and the upper mold 4 and the lower mold 5 cooperate with each other to form a completed ceramic pump body cavity, and the clay is poured into and fills the cavity to form a ceramic pump body blank 6; Step S200, demoulding the upper mold: manually removing the upper mold; in order to make the demoulding of the upper mold 4 smooth and prevent the ceramic pump body blank 6 from sticking to the inner wall of the cavity of the upper mold 4 during the demoulding process, the operator should gently tap the outer shell of the upper mold 4 before demoulding the upper mold 4, and the tapping points should be evenly distributed around the outer shell of the upper mold 4, so that the ceramic pump body blank 6 and the inner wall of the cavity of the upper mold 4 are separated in advance due to the tapping vibration; since the tapping force is limited, the vibration will not cause damage or deformation to the ceramic pump body blank 6; Step S300, set the drying mold: manually set the drying mold onto the lower mold to replace the original upper mold; after removing the upper mold 4, cover the lower mold 5 and the ceramic pump body blank 6 with the drying mold 7 whose cavity is consistent with the shape and size of the cavity of the upper mold 4, ensuring that the drying mold 7 and the lower mold 5 are accurately matched up and down, so that the upper half of the ceramic pump body blank 6 is accurately accommodated in the cavity of the drying mold 7, see Figure 3 ; Since the cavity of the drying mold 7 and the upper mold 4 are exactly the same, in actual production, multiple sets of dried upper molds 4 can be prepared to be used as drying molds 7 alone; Before the drying mold 7 is installed, release powder or other mold release agent needs to be sprayed in the cavity of the drying mold 7 to prevent the ceramic pump body blank 6 from adhering to the inner wall of the cavity of the drying mold 7 during the drying process, so as to facilitate the demoulding of the ceramic pump body blank 6 from the drying mold 7 after the drying is completed; since the ceramic pump body blank 6 itself will form a higher structural strength after drying, it can be directly taken out from the drying mold 7; Step S400, installing a turning fixture: installing the left and right ends of the drying mold and the lower mold on the turning fixture of the turning and demoulding device; See also Figure 4 The flip demoulding device comprises a hoisting beam 1, two hanging arms 2 arranged on the hoisting beam 1, and two sets of flip fixtures 3 symmetrically rotatably installed at the lower ends of the two hanging arms 2; the flip fixture 3 comprises an upper clamping block 31 and a lower clamping block 32 movably connected to clamp the two ends of the mold; the flip fixture 3 is rotatably arranged on the hanging arm 2 through a pin shaft 33 arranged on the outer side of the lower clamping block 32; The central axis of the pin 33 is not coaxial with the central axis of the mold, that is, the pin 33, which serves as the hinged rotation center, is eccentrically arranged with the central axis of the mold; when the turning fixture 3 clamps and installs the ends of the drying mold 7 and the lower mold 5, the lower clamping block 32 with the pin 33 is aligned with the end of the lower mold 5, and the upper clamping block 31 is aligned with the end of the drying mold 7, and then the lower clamping block 32 and the upper clamping block 31 are locked to complete the operation of clamping the ends of the drying mold 7 and the lower mold 5; Step S500, lifting the flip demoulding device: lifting the flip demoulding device, driving the flip fixture and the drying mold and the lower mold to be lifted off the ground as a whole; after installing the flip fixture 3 at the ends of the drying mold 7 and the lower mold 5, use the hook to hook the two ends of the lifting beam 1 and lift them upward to lift the drying mold 7 and the lower mold 5 off the ground, and the lifting height should ensure sufficient space for the mold to flip; in this embodiment, since the central axis of the mold and the central axis of the pin 33 are eccentrically arranged, it is necessary to manually hold the drying mold 7 and the lower mold 5 during the lifting process to prevent the mold from automatically and quickly flipping due to gravity and causing accidents such as hitting the ground; Step S600, flipping: rotate the flipping fixture to flip the drying mold and the lower mold 180 degrees as a whole, so that the positions of the drying mold and the lower mold are interchanged; the operator manually flips the drying mold 7 and the lower mold 5 around the pin 33 as a whole, so that the drying mold 7 is located at the bottom and the lower mold 5 is located at the top; in this embodiment, since the center axis of the mold and the center axis of the pin 33 are eccentrically arranged, the mold automatically flips due to its own gravity during the lifting process, and is manually assisted to stably flip to 180 degrees. In other embodiments, such as when the center axis of the mold is coaxially arranged with the center axis of the pin 33, the operator is required to manually flip the mold 180 degrees. See the state diagram after flipping. Figure 5 ; Step S700, remove the flipping fixture: the flip demoulding device is lowered to make the drying mold touch the ground, and the flipping fixture is removed; after the mold is flipped into place, the flip demoulding device is lowered to make the drying mold 7 at the bottom touch the ground, and the flipping fixture 3 is released, see Figure 6 ; Step S800, demolding: manually remove the lower mold to complete the demolding of the upper and lower molds of the ceramic pump body blank; when performing the demolding operation, it is consistent with the demolding operation of step S200: in order to make the demolding of the lower mold 5 smooth and prevent the ceramic pump body blank 6 from sticking to the inner wall of the cavity of the lower mold 5 during the demolding process, before removing the mold 5, the operator should gently tap on multiple points of the outer shell of the lower mold 5 to separate the ceramic pump body blank 6 from the inner wall of the cavity of the lower mold 5 in advance due to the tapping vibration; since the tapping force is limited, the vibration will not cause damage or deformation to the ceramic pump body blank 6.

[0020] At this point, the upper mold 4 and the lower mold 5 are demolded, and the bottom of the ceramic pump body blank 6 is supported by the drying mold 7 for drying. After drying, the ceramic pump body blank 6 generates structural strength and can be easily taken out from the drying mold 7 for subsequent production. The present invention first non-destructively demolds the cast ceramic pump body blank and the mold, covers the drying mold, replaces the original upper mold, and then uses a flip demolding device to flip the drying mold and the lower mold containing the ceramic pump body blank 180 degrees as a whole, so that the lower mold is at the top, and then non-destructively demolds the lower mold to complete the demolding operation of the ceramic pump body blank. During the demolding process, the ceramic pump body blank that has not formed structural strength is always supported by the lower mold or the drying mold cavity located below, ensuring that the ceramic blank is not deformed or damaged, and meeting the production process requirements of the ceramic pump body.

[0021] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A demoulding method for a ceramic pump body, characterized in that: The following steps are involved: Step S100, taking out the mold: after the ceramic pump body blank is mold-cast, the mold containing the ceramic blank is taken out from the mold-casting production line and transported to a drying area; Step S200, removing the upper mold: manually removing the upper mold; Step S300, putting on the air-drying mold: manually putting the air-drying mold on the lower mold to replace the original upper mold; Step S400, installing a turning fixture: installing the left and right ends of the drying mold and the lower mold on the turning fixture of the turning and demoulding device; Step S500, lifting and flipping the demoulding device: lifting and flipping the demoulding device, driving the flipping fixture, the drying mold and the lower mold to be lifted off the ground as a whole; Step S600, flipping: rotating the flipping fixture to flip the drying mold and the lower mold 180 degrees as a whole, so that the positions of the drying mold and the lower mold are interchanged; Step S700, removing the flipping fixture: the flipping demoulding device is lowered to make the drying mold touch the ground, and the flipping fixture is removed; Step S800, demoulding: manually removing the lower mold to complete demoulding of the upper mold and the lower mold of the ceramic pump body blank.

2. The demoulding method of a ceramic pump body according to claim 1, characterized in that: During the process of removing the upper mold in step S200 and removing the lower mold in step S800, the outer shell of the upper mold or the lower mold is manually knocked at multiple points to smoothly remove the ceramic pump body blank from the mold.

3. The demoulding method of a ceramic pump body according to claim 1, characterized in that: The drying mold cavity is consistent with the upper mold cavity in shape and size.

4. The demoulding method of a ceramic pump body according to claim 1, characterized in that: In the step S300, before the air-drying mold is fitted onto the lower mold, release powder needs to be sprayed in the air-drying mold cavity.

5. The demoulding method of a ceramic pump body according to claim 1, characterized in that: The flip demoulding device comprises a lifting beam (1), two hanging arms (2) arranged on the lifting beam (1), and two sets of flip clamps (3) symmetrically rotatably mounted on the lower ends of the two hanging arms (2); the flip clamps (3) comprise an upper clamping block (31) and a lower clamping block (32) movably connected to clamp the two ends of the mold; the flip clamps (3) are rotatably mounted on the hanging arms (2) via a pin shaft (33) arranged on the outer side of the lower clamping block (32).

6. The demoulding method of a ceramic pump body according to claim 1, characterized in that: The central axis of the pin (33) is not coaxial with the central axis of the mold.

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