Ceramic pump body mold, chemical pump and preparation method of chemical pump

Abstract

The invention relates to a ceramic pump body mold which comprises a shell, a flexible sleeve and a loose core, an opening of the shell is sealed through the loose core, the flexible sleeve is located in the shell and matched with the shell in structure, and a first cavity for containing a film material is formed between the flexible sleeve and the shell; and the flexible sleeve is disassembled and assembled through the opening of the shell. The mold has the beneficial effects that the mold is formed by the shell, the flexible sleeve and the core pulling structure, so that after a film material is injected, the mold is protected from being damaged in the assembling and disassembling processes through the flexible sleeve, the service life is prolonged, the mold structure is simplified, the mold is convenient to disassemble and assemble, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pump body moulds, in particular to a ceramic pump body mould, a chemical pump and a preparation method thereof. Background Art

[0002] Silicon carbide resin composite ceramics are corrosion-resistant and wear-resistant, and are an ideal alternative to metal materials under high-corrosion conditions. They have been widely used in the chemical industry. Because the production process of composite ceramics is more environmentally friendly and the products are easy to repair, they have also been vigorously promoted and supported by the country.

[0003] Silicon carbide resin composite ceramics have poor impact toughness due to their own composition characteristics. They are prone to cracking when hit, causing leakage of hazardous chemicals in production. Therefore, chemical pumps made of composite ceramics need to be covered with an impact-resistant metal shell. However, for small chemical pumps, since the shells are mostly made of an integral structure, considering the assembly of the mold, if the T-type flow channel mold is made of metal, the mold structure design will be very complicated. In addition, due to the poor yield of silicon carbide resin composite ceramics, the service life of the mold will be greatly limited, which is not conducive to controlling production costs. Summary of the invention

[0004] The present invention aims at the technical problems existing in the prior art and provides a ceramic pump body mold, a chemical pump and a preparation method thereof. Specifically, the structural design problem of a composite resin ceramic pump body mold is solved by combining a flexible material and a metal mold.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] The first aspect of the present invention is to protect a ceramic pump body mold, comprising: a shell, a flexible sleeve, and a core pull, wherein the opening of the shell is sealed by the core pull, and the flexible sleeve is located in the shell and adapted to its structure, so that a first cavity for accommodating a film material is formed between the flexible sleeve and the shell;

[0007] The flexible sleeve is assembled and disassembled through the opening of the shell.

[0008] As a further technical solution, it also includes an upper cover plate with an injection hole, and the upper cover plate is adapted to be sealed and connected to one end of the core pulling so that the injection hole is opposite to the first cavity, and is used to inject the film material from the injection hole into the first cavity.

[0009] As a further technical solution, it also includes a connecting member and a supporting member, wherein the connecting member is detachably connected to the supporting member, and the core pulling member, the connecting member, the supporting member, the flexible sleeve, and the outer shell are arranged in sequence, and the flexible sleeve is supported by the supporting member.

[0010] As a further technical solution, a positioning ring is also included. The positioning ring is sleeved outside the core pulling member and is detachably connected to the connecting member to position the supporting member.

[0011] As a further technical solution, the outer shell is an annular volute, and the opening is arranged on the inner annular wall surface of the volute;

[0012] The core puller is cylindrical, so that the opening is sealed by the outer circumferential wall of the core puller.

[0013] As a further technical solution, the core pulling device is a hollow cylinder with one end open and the other end closed, and the core pulling device is concentric with the inner annular wall surface of the volute;

[0014] The positioning ring is sleeved at one end of the core-pulling opening, and the upper cover plate is adapted to be connected to one end of the core-pulling seal.

[0015] As a further technical solution, at least one concave hole is provided on the end of the connecting member facing the core-pulling member, for inserting a screw to fix the connecting member to the supporting member.

[0016] The second aspect of the present invention is to provide a method for preparing a ceramic chemical pump, which is prepared using the mold described in the first aspect, and the specific steps are as follows:

[0017] S1. preparing a flexible sleeve;

[0018] S2. Assemble the mold: insert the flexible sleeve, the support member, and the connecting member into the flow channel of the shell from the opening in sequence, and assemble and fix the support member and the connecting member so that the flexible sleeve forms a first cavity with uniform thickness along the inner wall of the shell; then install the positioning ring, the upper cover plate, and the core puller in sequence to seal the shell;

[0019] S3, injection molding: injecting the film material from the injection hole of the upper cover plate into the first cavity formed by the inner wall of the shell and the flexible sleeve, so that the injected film material forms a structure with the same shape as the shell;

[0020] S4. Demoulding: After the injected film material solidifies, remove the upper cover plate, core puller, positioning ring, connector, support member and flexible sleeve in sequence.

[0021] As a further technical solution, in step S4, the upper cover plate, the core puller, and the positioning ring are first removed along the axial direction of the positioning ring, and then the screws between the connecting member and the supporting member are removed, and the connecting member is pulled out to leave enough space for the supporting member to be pulled out.

[0022] The third aspect of the present invention protects a chemical pump prepared by the method of the second aspect.

[0023] The beneficial effects of the present invention are:

[0024] 1. The mold is composed of a shell, a flexible sleeve, and a core-pulling structure. After the film material is injected, the flexible sleeve protects the mold from being damaged during assembly and disassembly. At the same time, it avoids damage caused by friction between the mold and the film material, thereby increasing the service life of the mold. In addition, the mold has a simple structure, and there is no need to design a layered structure in the flow channel, which reduces the processing cost of the mold and improves production efficiency.

[0025] 2. The shell is an integrated structure. Through the injection hole connected to the first cavity provided on the upper cover plate, the flexible sleeve is used to make the film material have the same shape as the shell after injection and curing, and the ceramic film material is not easily damaged when removing the mold, so as to obtain a chemical pump with ceramic lining;

[0026] 3. The core-pulling structure design not only helps the mold forming, but also has the function of stopping the connector from retreating;

[0027] 4. The design of the support in the mold prevents the flexible sleeve from collapsing and deforming due to pressure during the pouring process;

[0028] 5. The ceramic chemical pump preparation method of the present invention is fast, has a high yield rate, and has a long service life of the mold; in addition, the mold assembly and mold removal processes in the preparation process will not affect the surface quality of the ceramic;

[0029] 6. The prepared chemical pump is a ceramic lined chemical pump, and the ceramic surface quality of the product is good;

[0030] 7. The flexible sleeve also seals the structural connection gaps to prevent leakage during the pouring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the longitudinal cross-section structure of the mold of Example 1 of the present invention, into which the film material is injected;

[0032] Figure 2 This is a schematic cross-sectional structure diagram of the mold of Example 1 of the present invention, into which the film material is injected;

[0033] Figure 3 It is a schematic diagram of a partially enlarged structure of Example 1 of the present invention, wherein the film material is injected and solidified and the core pulling and top cover are removed.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] Shell 1, opening 11, water stopper 12, insertion end 121, inner ring wall 13;

[0036] Flexible sleeve 2, core pulling 3, support rib 31, first cavity 4, film material 41, second cavity 42;

[0037] Upper cover plate 5, injection hole 51;

[0038] Connecting piece 6 , recessed hole 61 , supporting piece 7 , positioning ring 8 , screw 9 . DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0040] In the description of this application, 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 this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0041] In the description of the present application, the term "for example" is used to mean "used as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details to obscure the description of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0042] Example 1

[0043] To solve the mold design problem of chemical pumps, simplify the mold design and increase the mold life: Figure 1 , Figure 2, a ceramic pump body mold is provided, comprising a shell 1, a flexible sleeve 2, and a core pull 3. The opening 11 of the shell 1 is sealed by the core pull 3. The flexible sleeve 2 is located in the shell 1 and is adapted to its structure, so that a first cavity 4 for accommodating a film material 41 is formed between the flexible sleeve 2 and the shell 1; the film material 41 here can be a silicon carbide composite ceramic, and the shape of the ceramic after being injected into the first cavity 4 is consistent with the inner wall of the shell 1. Through the isolation of the flexible sleeve 2, the influence on the ceramic surface during mold removal is avoided; and the flexible sleeve 2 is convenient to operate, and the flexible sleeve 2 is disassembled and assembled through the opening 11 of the shell 1, that is, when assembling the mold, the pre-prepared flexible sleeve 2 is inserted into the flow channel of the shell 1 from the opening 11 and made to be close to the inner wall of the shell 1. The mold has a simple structure, and there is no need to design a layered structure in the flow channel of the shell 1, which reduces the processing cost of the mold.

[0044] For example, the flexible sleeve 2 is a hollow structure and can be removed and reused after the chemical pump is prepared. That is, each time a chemical pump is prepared, the flexible sleeve 2 needs to be reinserted into the new outer shell 1. With the flexible sleeve 2, there is no need to worry about damage to the mold during the mold removal process, that is, the ceramic surface quality is better, which improves production efficiency and increases the service life of the mold; the flexible sleeve 2 can be made of silicone.

[0045] For example, see Figure 1 A water stopper 12 which is adapted to be connected to the port of the outer shell 1 is provided at one end of the water outlet, and one end of the water stopper 12 is inserted into the outer shell 1. At this time, the insertion end 121 of the water stopper 12 abuts against the flexible sleeve 2, that is, the space formed by the outer wall of the flexible sleeve 2, the water stopper 12 and the inner wall of the outer shell 1 is the first cavity 4.

[0046] The material of the housing 1 can be plastic or other corrosion-resistant and impact-resistant materials.

[0047] In the specific implementation process, see Figure 2 The mold also includes an upper cover plate 5 with an injection hole 51, and the upper cover plate 5 is adapted and sealed to be connected to one end of the core pulling 3, so that the injection hole 51 is opposite to the first cavity 4, and is used to inject the film material 41 into the first cavity 4 from the injection hole 51.

[0048] For example, if the upper cover plate 5 is circular, in order to quickly complete the injection of the film material 41, a plurality of injection holes 51 are provided at equal intervals along the circumferential direction of the upper cover plate 5, so that the film material 41 enters through the plurality of injection holes 51 and quickly flows and forms in the first cavity 4, thereby further improving work efficiency.

[0049] In the specific implementation process, see Figure 1 , Figure 2The mold also includes a connecting member 6 and a supporting member 7. The connecting member 6 is detachably connected to the supporting member 7, and the core pulling 3, the connecting member 6, the supporting member 7, the flexible sleeve 2, and the outer shell 1 are arranged in sequence, and the flexible sleeve 2 is supported by the supporting member 7.

[0050] For example, a flexible layer (not shown in the figure) is provided on one side of the support member 7 facing the flexible sleeve 2, and the thickness of the flexible layer is controlled as required; the material of the flexible layer can be silicone.

[0051] The support member 7 is a core bone, which has the function of supporting the flexible sleeve 2, that is, the flexible sleeve 2 is in contact with the inner wall of the shell 1 to form the same shape, making preliminary preparations for the ceramic shape of the later injection molding. For stability, the connecting member 6 is placed between the core pulling 3 and the support member 7, so that the support member 7 supports the flexible sleeve 2 and prevents it from deforming.

[0052] For example, the connecting member 6 has the same shape as the opening 11 of the housing 1, so that the connecting member 6 can be inserted into the housing 1 and fix the supporting member 7 (here, the supporting member 7 can be provided in multiple numbers). Figure 1 , Figure 2 , at least one concave hole 61 is provided on the end of the connecting member 6 facing the core pull 3, for inserting a screw 9 to fix the connecting member 6 to the supporting member 7. At this time, the number of the supporting members 7 may be equal to the number of the concave holes 61, and the shapes of the concave holes 61 may be the same or different. It can be explained that the side of the connecting member 6 facing the core pull 3 is adapted to the core pull 3.

[0053] In the specific implementation process, see Figure 2 The mold further includes a positioning ring 8, which is sleeved outside the core puller 3 and detachably connected to the connecting member 6, and is used to position the supporting member 7. For example, the positioning ring 8 is arranged between the outer wall of the core puller 3 and the first cavity 4, that is, there is a gap between the positioning ring 8 and the inner wall of the shell 1.

[0054] In the specific implementation process, see Figure 1 , Figure 3The outer shell 1 is an annular volute, and the opening 11 is arranged at the inner ring wall 13 of the volute; the core pulling 3 is cylindrical, so that the opening 11 is sealed by the outer circumferential wall of the core pulling 3; the volute is provided with an annular boss 14 that is adapted to the size of the inner ring wall 13, and the annular boss 14 is protruded toward one end where the upper cover plate 5 is provided (that is, the annular boss 14 and the inner ring wall 13 are co-centering), preferably, the annular boss 14 is integrally formed with the outer shell 1, and the upper cover plate 5 is adapted to seal with the annular boss 1, so that the upper part of the core pulling 3 toward one end of the upper cover plate 5, the upper cover plate 5, and the annular boss 14 form a second cavity 42 for casting the film material, and the second cavity 42 is connected with the first cavity 4, so as to form a complete chemical pump in combination with the outer shell 1. It can be seen that the film material 41 cast in the second cavity 42 is in a circular shape, while the film material 41 cast in the first cavity 4 is in a volute shape (see Figure 2 viewing angle).

[0055] For example, the positioning ring 8 is sleeved on the core pulling 3, and the longitudinal cross-section of one side of the positioning ring 8 is Z-shaped (see Figure 2 viewing angle).

[0056] More specifically, see Figure 2 The core puller 3 is a hollow cylinder with one end open and the other end closed, and the core puller 3 is concentric with the inner ring wall 13 of the volute; the positioning ring 8 is sleeved on the open end of the core puller 3, the upper cover plate 5 is adapted to connect the sealed end of the core puller 3, and the positioning ring 8 is screwed to the connecting member 6;

[0057] See also Figure 1 , Figure 3 According to the size of the inner ring wall 13 of the volute, the connecting member 6 can be divided into several sections, and correspondingly, the supporting member 7 can also be divided into several sections (the supporting member 7 corresponds to the connecting member 6 one by one), so that the supporting member 7 can be directly taken out from the opening 11. In addition, the connecting member 6 connects the supporting member 7 with the positioning ring 8 and has a spatial positioning function for the supporting member 7. It can be explained that, referring to Figure 1 At this time, the side of the connecting member 6 facing the flexible sleeve 2 is a circular surface, and the supporting member 7 is adapted to the circular surface. During this process, the side of the supporting member 7 facing away from the connecting member 6 squeezes the flexible sleeve 2 so that it is tightly attached to the inner wall of the outer shell 1. When the film material 41 is injected, due to the physical properties of the flexible sleeve 2, a first cavity 4 for accommodating the film material is formed between the flexible sleeve 2 and the inner wall of the outer shell 1.

[0058] In order to make the flexible sleeve 2 completely close to the inner wall of the housing 1 , the support member 7 may be ring-shaped, that is, the outer wall of the ring abuts against the outer wall of the flexible sleeve 2 .

[0059] For example, see Figure 1 In order to strengthen the supporting effect, the hollow part of the core pulling 3 is provided with a cross-shaped supporting rib 31.

[0060] In this embodiment, the positioning ring 8 can be a positioning opening ring.

[0061] The mold flow channel of the present invention adopts a segmented structure, and the shell of the obtained chemical pump is integrally formed, which simplifies the structural design and production difficulty of the chemical pump; in addition, the mold structure design makes it unnecessary to worry about the mold being damaged during the mold removal process, thereby improving production efficiency and increasing the service life of the mold.

[0062] Example 2

[0063] A method for preparing a ceramic chemical pump with a simple preparation process and convenient operation is provided, which is prepared using the mold described in Example 1, and the specific steps are as follows:

[0064] S1, preparing a flexible sleeve 2;

[0065] S2, assembling the mold: insert the flexible sleeve 2, the support member 7, and the connecting member 6 into the flow channel of the shell 1 from the opening 11 in sequence, and assemble and fix the support member 7 and the connecting member 6 so that the flexible sleeve 2 forms a first cavity 4 with uniform thickness along the inner wall of the shell 1; then install the positioning ring 8, the upper cover plate 5, and the core pull 3 in sequence to seal the shell 1;

[0066] In this process, after inserting the support member 7, the flexible sleeve 2 needs to be opened in place, and then the core bone and the connecting member 6 are inserted and fixed by screws. At this time, the opened flexible sleeve 2 can be stably fixed; that is, after adjusting the position, the positioning ring 8, the upper cover plate 5, and the core pulling 3 are installed in sequence;

[0067] S3, injection molding: injecting the film material 41 from the injection hole 51 of the upper cover plate 5 into the first cavity 4 formed by the inner wall of the shell 1 and the flexible sleeve 2, so that the injected film material 41 forms a structure with the same shape as the shell 1;

[0068] In this step, the injected film material 41 may be silicon carbide resin composite ceramic;

[0069] S4, demoulding: after the injected film material 41 is cured, the upper cover plate 5, the core puller 3, the positioning ring 8, the connector 6, the support member 7, and the flexible sleeve 2 are removed in sequence to obtain a chemical pump lined with ceramic.

[0070] In step S4, the upper cover plate 5, the core puller 3, and the positioning ring 8 are first removed along the axial direction of the positioning ring 8 (that is, they can be directly removed from the direction where the upper cover plate 5 or the positioning ring 8 is provided), and then the screws 9 between the connecting member 6 and the supporting member 7 are removed, and the connecting member 6 is pulled out to leave enough space for the supporting member 7 to be pulled out, and the flexible sleeve 2 can be directly peeled off and reused;

[0071] The housing 1 in this embodiment is the housing 1 of a chemical pump.

[0072] Example 3

[0073] A chemical pump is protected and prepared by the method of Example 2.

[0074] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A ceramic pump body mold, characterized in that: It comprises an outer shell (1), a flexible sleeve (2), and a core puller (3); an opening (11) of the outer shell (1) is sealed by the core puller (3); the flexible sleeve (2) is located inside the outer shell (1) and is adapted to its structure, so that a first cavity (4) for accommodating film material is formed between the flexible sleeve (2) and the outer shell (1); The flexible sleeve (2) is assembled and disassembled through the opening (11) of the outer shell (1).

2. A ceramic pump body mold according to claim 1, characterized in that: It also includes an upper cover plate (5) with an injection hole (51), the upper cover plate (5) is adapted to be sealed and connected to one end of the core puller (3), so that the injection hole (51) is opposite to the first cavity (4), and is used to inject the film material from the injection hole (51) into the first cavity (4).

3. A ceramic pump body mold according to claim 2, characterized in that: It also includes a connecting piece (6) and a supporting piece (7), wherein the connecting piece (6) and the supporting piece (7) are detachably connected, and the core pulling (3), the connecting piece (6), the supporting piece (7), the flexible sleeve (2), and the outer shell (1) are arranged in sequence, and the flexible sleeve (2) is supported by the supporting piece (7).

4. A ceramic pump body mold according to claim 3, characterized in that: It also comprises a positioning ring (8), which is sleeved outside the core pulling (3) and is detachably connected to the connecting member (6) and is used to position the supporting member (7).

5. A ceramic pump body mold according to claim 4, characterized in that: The outer shell (1) is in the shape of an annular volute, and the opening (11) is arranged on the inner annular wall surface (13) of the volute; The core puller (3) is cylindrical, so that the opening (11) is sealed by the outer circumferential wall of the core puller (3).

6. A ceramic pump body mold according to claim 5, characterized in that: The core pulling device (3) is in the shape of a hollow cylinder with one end open and the other end closed, and the core pulling device (3) is co-centric with the inner annular wall surface (13) of the volute; The positioning ring (8) is sleeved on one end of the opening of the core puller (3), and the upper cover plate (5) is adapted to be connected to one end of the seal of the core puller (3).

7. A ceramic pump body mold according to claim 3, characterized in that: At least one concave hole (61) is provided on one end of the connecting member (6) facing the core puller (3) for inserting a screw (9) to fix the connecting member (6) to the supporting member (7).

8. A method for preparing a ceramic chemical pump, characterized in that: Use any one of 4-7 to prepare the mold, and the specific steps are as follows: S1, preparing a flexible sleeve (2); S2, assembling the mold: inserting the flexible sleeve (2), the support member (7), and the connecting member (6) into the flow channel of the outer shell (1) from the opening (11) in sequence, and assembling and fixing the support member (7) and the connecting member (6) so that the flexible sleeve (2) forms a first cavity (4) with uniform thickness along the inner wall of the outer shell (1); then installing the positioning ring (8), the upper cover plate (5), and the core puller (3) in sequence to seal the outer shell (1); S3, injection molding: injecting film material from the injection hole (51) of the upper cover plate (5) into the first cavity (4) formed by the inner wall of the outer shell (1) and the flexible sleeve (2), so that the injected film material forms a structure with the same shape as the outer shell (1); S4, demoulding: after the injected film material is solidified, the upper cover plate (5), the core puller (3), the positioning ring (8), the connecting piece (6), the supporting piece (7), and the flexible sleeve (2) are removed in sequence.

9. The method for preparing a ceramic chemical pump according to claim 8, characterized in that: In step S4, the upper cover plate (5), the core puller (3), and the positioning ring (8) are first removed along the axial direction of the positioning ring (8), and then the screws (9) between the connecting member (6) and the supporting member (7) are removed, and the connecting member (6) is pulled out to leave enough space for the supporting member (7) to be pulled out.

10. A chemical pump, characterized in that: Prepared by the process as claimed in claim 8.

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