A method for forming a heat insulation board for a pump

Abstract

The present invention discloses a method for forming a heat insulation board for a pump, which belongs to the field of pump processing. The present invention integrally forms a conductive element on the heat insulation board to achieve the functions of heat insulation and line connection with one heat insulation board at the same time. The specific process is to first integrally injection mold the conductive body and the outer shell to ensure the relative position and size of the conductive body are accurate, to avoid the conductive body being directly injection molded with the heat insulation board and causing deformation and displacement due to a large injection pressure, and then perform secondary injection molding on the separate conductive element and the heat insulation board, so as to ensure product accuracy and strength. The heat insulation board prepared by the present invention uses one heat insulation board to achieve the functions of heat insulation and line connection at the same time, effectively simplifying the assembly process of the heat insulation board and the line connection, improving production efficiency, and reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of pump processing, and more specifically, to a method for forming a heat insulation board for a pump. Background Art

[0002] The pump unit structure includes a motor and a control box, and the circuit board is installed in the control box and connected to the motor through an outlet adapter structure. In order to prevent the heat of the motor from being conducted to the inside of the control box, it is preferred to set a heat insulation board between the motor base and the control box for heat insulation. Since the heat insulation board is isolated between the motor base and the control box, and the outlet adapter structure needs to be connected to the motor and the control box at the same time, the installation and coordination between the outlet adapter and the heat insulation board is particularly important. At present, the commonly used method is to leave sufficient gap avoidance space in the edge area of ​​the heat insulation board. On the basis of the heat insulation board being installed in coordination with the motor and the control box respectively, the outlet adapter structure can pass through the avoidance space and be installed in coordination with the motor and the control box respectively, so that the heat insulation board and the outlet adapter can be installed independently without interfering with each other. This method is more complicated in the assembly process during production and installation, which increases the cumulative error of coordination, the production cost of the heat insulation board and the outlet adapter structure is high, the production efficiency is reduced, and the overall cost of the pump is further increased. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] The purpose of the present invention is to provide a method for forming and processing a heat insulation board for a pump in view of the fact that the assembly process of the heat insulation board and the outlet line adapter structure in the prior art is complicated and the production efficiency is low. The prepared heat insulation board can effectively simplify the assembly process of the heat insulation board and the outlet line adapter, improve production efficiency and reduce production costs.

[0005] 2. Technical solution

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] The present invention provides a method for forming a heat insulation board for a pump, wherein the heat insulation board is used to be installed between a control box and a motor of the pump to block heat transfer; the method comprises:

[0008] S1. One-step injection molding: placing a conductive body into a mold for injection molding, and overmolding an outer shell around the conductive body to obtain a conductive element; the two ends of the conductive body are respectively a first electrical plug connector and a second electrical plug connector, and the first electrical plug connector and the second electrical plug connector both extend beyond the outer shell;

[0009] S2. Secondary injection molding: placing the conductive element into a mold for injection molding to form the board body of the thermal insulation board, wherein the first electrical plug connector and the second electrical plug connector on the conductive element are respectively located on both sides of the board body and both extend beyond the board surface of the board body.

[0010] Furthermore, it also includes:

[0011] S3. Installing seals: Installing seals at the intersection of the first electrical plug connector and the board surface of the board body, and at the intersection of the second electrical plug connector and the board surface of the board body.

[0012] Furthermore, the first electrical plug connector and the second electrical plug connector are staggeredly distributed at both ends of the conductive body along a transverse direction relative to the plugging and unplugging direction thereof, and the first electrical plug connector and the second electrical plug connector are electrically connected via the conductive connector;

[0013] In a one-shot injection molding process, the molded outer shell completely encloses the conductive connector and partially encloses the first electrical plug connector and the second electrical plug connector;

[0014] During the secondary injection molding process, the plate body completely wraps the outer shell outside the conductive connector inside, and partially wraps the outer shell outside the first electrical plug connector and the second electrical plug connector.

[0015] Furthermore, during one injection molding process, the conductive body is positioned and installed in the injection mold, and the injection mold is provided with ejectors to tighten the conductive body from both sides. After one injection molding, injection holes are formed on both sides of the outer shell to expose the internal conductive body.

[0016] During the secondary injection molding process, the molded plate body covers and fills the injection molding holes on the outer shell.

[0017] Furthermore, during one injection molding process, the conductive body is placed in a corresponding installation slot on the injection mold, and a through hole is provided on the first electrical plug connector of the conductive body, and a positioning column is provided in the mold installation slot to fit and embed in the through hole; after the conductive body is positioned and installed, injection molding begins.

[0018] Furthermore, in the secondary injection molding, a first ring wall and a second ring wall protruding outward are respectively formed on the plate surfaces on both sides of the plate body, and a groove space is formed in the first ring wall and the second ring wall, and the first electrical plug connector extends from the first ring wall, and the second electrical plug connector extends from the second ring wall;

[0019] In step S3, sealing members are respectively installed in the groove spaces of the first annular wall and the second annular wall, and are sealed around the outer peripheries of the first electrical plug connector and the second electrical plug connector.

[0020] Furthermore, in the secondary injection molding stage, a protective wall protruding outward is formed on the plate surface of the plate body inside the second annular wall, and the second electrical plug connector is hidden in the open cavity formed in the protective wall; in step S3, a seal is arranged between the protective wall and the second annular wall.

[0021] Furthermore, in the primary injection molding stage, a first convex rib protruding outward is molded on the upper portion of the outer shell of the first electrical plug connector; in step S3, the seal is injection molded using a sealing soft rubber, and the upper surface of the seal after molding is flush with the upper surface of the first convex rib.

[0022] Furthermore, in step S3, a positioning piece is provided on the mold to press downward on the first convex rib to fix the conductive element, and glue injection and molding are started from the space below the first convex rib.

[0023] Furthermore, in the secondary injection molding stage, outwardly protruding reinforcing ribs are respectively formed on the bottom walls of the groove spaces of the first annular wall and the second annular wall, and in step S3, the sealing member is injection molded to cover the reinforcing ribs.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] The method for forming a heat insulation board for a pump of the present invention integrally forms a conductive element on the heat insulation board to achieve the functions of heat insulation and line connection with one heat insulation board. Since the two are an integrated structure, only the overall components need to be installed and fixed during installation, which reduces the complexity of the assembly process and the assembly time, reduces the cumulative error, effectively improves production efficiency and product stability, and effectively saves the cost of processing raw materials and processing molds.

[0027] In the forming and processing method of the heat insulation board for pumps of the present invention, the first electrical plug-in connector and the second electrical plug-in connector are staggeredly distributed on both sides of the board body along the lateral direction relative to the plug-in direction thereof, which is beneficial to improving the adaptability of the heat insulation board so that it can correspond to the positions of the plug-in connection ends on the electric control board and the motor body respectively.

[0028] The present invention provides a method for forming a heat insulation board for a pump, firstly integrally injection-molding the conductive body and the outer shell to ensure the relative position and size accuracy of the conductive body, and avoid the problem of deformation and displacement caused by the conductive body being directly injection-molded with the heat insulation board and subjected to a large injection pressure, and then a separate conductive element and the heat insulation board are subjected to secondary injection molding. At this time, the relative position of the conductive body has been fixed, and the strength has been effectively enhanced. It is difficult to deform during the secondary injection molding stage of the molded heat insulation board, thereby ensuring the accuracy and strength of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the pump unit in the embodiment;

[0030] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the pump unit in the embodiment;

[0031] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0032] Figure 4 This is a schematic diagram of the state of the pump unit after the control box is removed in the embodiment;

[0033] Figure 5 Schematic diagram of the state where the conductive element is connected to the motor body and the electric control board respectively in the embodiment;

[0034] Figure 6 A schematic diagram of the distribution state of the conductive body in the embodiment;

[0035] Figure 7 This is a schematic diagram of the structure of the conductive body after being integrally formed in the embodiment;

[0036] Figure 8 for Figure 7 A schematic diagram of the structure from a rear side perspective;

[0037] Fig. 9 Schematic diagram of the overall structure of the heat insulation board and the conductive element in the embodiment;

[0038] Fig.10 for Fig. 9 Schematic diagram of the internal cross-sectional structure;

[0039] Fig.11 for Fig. 9 Schematic diagram of the upward viewing angle structure;

[0040] Fig.12 It is a schematic diagram of the structure of a separate heat insulation board in the embodiment;

[0041] Fig.13 for Fig.12 Schematic diagram of the upward viewing angle structure;

[0042] Fig.14 for Fig.12 Schematic diagram of the internal cross-sectional structure.

[0043] Explanation of the symbols in the schematic diagram:

[0044] 100, control box; 110, box seat; 111, mounting hole; 112, mounting ring wall; 120, electric control board;

[0045] 200, motor; 210, base; 220, motor body;

[0046] 300, heat insulation board; 310, board body; 311, first annular wall; 312, first mounting portion; 313, second annular wall; 314, protective wall; 315, sealing member; 316, second mounting portion;

[0047] 400, conductive element; 401, first electrical plug-in connector; 402, second electrical plug-in connector; 403, conductive connector; 410, first injection molding part; 411, connecting injection molding part; 412, second injection molding part; 413, first convex rib; 414, second convex rib; 415, second hole position; 416, first hole position. DETAILED DESCRIPTION

[0048] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0049] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0050] In addition, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, and it can be the internal connection of two components; the terms "first", "second", "third", and "fourth" should be understood in a broad sense, and are only used to distinguish feature names, and do not indicate a specific order relationship. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The present invention will be further described below in conjunction with the embodiments.

[0052] Example

[0053] Combination Figure 1-Figure 14 , this embodiment provides a pump unit, including:

[0054] The control box 100 includes a box seat 110 and an electric control board 120 disposed in an inner cavity of the box seat 110;

[0055] The motor 200 includes a base 210 and a motor body 220 disposed in an inner cavity of the base 210;

[0056] The heat insulation board 300 includes a board body 310, and the board body 310 is installed between the box seat 110 and the machine base 210 to block the heat transfer between the box seat 110 and the machine base 210, and prevent a large amount of heat in the machine base 210 from being conducted to the control box 100; specifically, a plurality of groups of first mounting portions 312 are provided on the board surface of the heat insulation board 300 facing the box seat 110, and bolt mounting holes are provided on the first mounting portions 312 to be fixedly installed with the box seat 110 by bolt fastening, and a plurality of groups of second mounting portions 316 are correspondingly provided on the board surface of the heat insulation board 300 facing the machine base 210, which can be fixedly installed with the machine base 210 by bolt fastening.

[0057] It should be noted that in this design, a conductive element 400 is also provided on the board body 310, and the conductive element 400 has a first electrical plug connector 401 and a second electrical plug connector 402, wherein the first electrical plug connector 401 is located on the side of the board body 310 facing the box seat 110, and is electrically connected to the electric control board 120; the second electrical plug connector 402 is located on the side of the board body 310 facing the machine seat 210, and is electrically connected to the motor body 220, specifically, to the motor stator assembly; the conductive element 400 is at least partially located between the board body 310, and the conductive element 400 and the board body 310 are integrally formed, and the two are insulated and non-conductive, that is, the conductive element 400 is used to achieve electrical communication between the electric control board 120 and the motor body 220, and the board body 310 is used to achieve heat isolation, and the conductive element 400 and the board body 310 are insulated and cannot be electrically connected. In practice, the conductive element 400 can adopt a pin structure.

[0058] The present design achieves the functions of heat insulation and line switching with one heat insulation board 300 by integrally setting a conductive element 400 on the heat insulation board 300. Since the two are an integrated structure, only the overall components need to be installed and fixed during installation, which reduces the complexity of the assembly process and the assembly time, reduces the cumulative error, and effectively improves the production efficiency and product stability. The traditional line switching component and the heat insulation board 300 component are combined into a single component, which also effectively saves the cost of processing raw materials and processing molds, greatly improving the production efficiency and market competitiveness of the product.

[0059] Combination Figures 1 to 5As shown, in this design, the box seat 110 is installed at the tail end of the machine base 210 in the axial direction, and the board body 310 is installed between the box seat 110 and the two relatively close walls of the machine base 210. Taking the machine base 210 as a circular ring-shaped seat body, that is, the box seat 110 is set at the tail end along the axial length direction of the machine base 210, and the box seat 110 and the machine base 210 are arranged in sequence in the axial direction. At this time, the heat generated inside the motor is easily transferred directly to the box seat 110. The board body 310 is set between the two, which is not only more convenient for blocking heat, but also convenient for the conductive elements 400 on both sides of the board surface to connect the electric control board 120 and the motor body 220 up and down.

[0060] As a different implementation, the conductive element 400 can be directly integrated with the board body 310. For example, if a conductive pin is used as the conductive element 400, the conductive pin can be directly integrated with the board body 310 by injection molding or other molding methods. In some other preferred embodiments, the conductive element 400 includes an internal conductive body and an outer shell covering the outside of the conductive body. For example, if a conductive pin is used as the conductive body, the outer shell is formed outside the conductive pin, and the two ends of the conductive body are respectively the first electrical plug connector 401 and the second electrical plug connector 402, and the first electrical plug connector 401 and the second electrical plug connector 402 both extend outside the outer shell; the outer shell and the conductive body are integrally formed. At this time, the conductive body is first integrally formed with the outer shell on the outside to form a pre-positioned installation and structural reinforcement of the conductive body. Furthermore, the outer shell of the conductive element 400 is at least partially located inside the board body 310, and the first electrical plug connector 401 and the second electrical plug connector 402 both extend beyond the board surface of the board body 310, and the outer shell of the conductive element 400 is integrally formed with the board body 310. At this time, the conductive element 400 and the board body 310 are formed in two steps, that is, the conductive body and the outer shell of the conductive element 400 are first integrally formed into a separate component, and then the formed conductive element 400 is integrally formed with the board body 310. In practice, the integral forming method includes various methods such as injection molding, such as the conductive body and the outer shell of the conductive element 400 can be integrally formed by injection molding; or the formed conductive element 400 and the board body 310 can be integrally formed by injection molding, or both molding methods can be injection molding.

[0061] In certain embodiments, in combination Figure 6-Figure 10As shown, the first electrical plug connector 401 and the second electrical plug connector 402 of the conductive element 400 are staggeredly distributed on both sides of the board body 310 along the transverse direction relative to its plug-in direction, and both extend beyond the board surface of the board body 310; the first electrical plug connector 401 and the second electrical plug connector 402 are electrically connected through the conductive connector 403, and the conductive connector 403 is at least partially wrapped inside the board body 310. The conductive connector 403 extends transversely inside the board body 310, and the plug-in direction is the up and down installation direction. Taking the circular plate body 310 as an example, the first electrical plug connector 401 and the second electrical plug connector 402 both extend axially on both sides of the plate body 310, and the conductive connector 403 can extend radially in the plate body 310, so that the conductive element 400 as a whole forms a Z-shaped distribution. Through this design, the first electrical plug connector 401 and the second electrical plug connector 402 are staggered, which is conducive to improving the adaptability of the heat insulation board 300. By adjusting the lateral staggered position, it can adapt to different sizes of the electric control board 120 and the motor body 220. Similarly, the conductive connector 403 can also be distributed in an inclined or bent manner in the plate body 310, as long as the staggered arrangement of the first electrical plug connector 401 and the second electrical plug connector 402 can be achieved.

[0062] In the conventional technology, the pins of the outgoing line adapter are usually passed through the heat insulation board 300 in a straight line. Fig.10 In terms of the middle upper and lower positions, the first electrical plug connector 401 and the second electrical plug connector 402 are in a state where the upper and lower positions are completely aligned. Figure 5 As shown in the state, it is necessary that the positions of the plug-in connection ends on the electric control board 120 and the motor body 220 must also be completely aligned up and down. However, in practice, the size specifications of the electric control board 120 and the motor body 220 are often different, and the size difference between the two is obvious, resulting in the plug-in connection ends of the two cannot completely correspond up and down. The traditional straight-line pin method is difficult to adapt and use, and even the specifications of the electric control board 120 or the motor body 220 need to be adjusted, resulting in an increase in the volume of the pump structure and an increase in the overall cost.

[0063] In the present design, a laterally extending conductive connector 403 is provided between the first electrical plug connector 401 and the second electrical plug connector 402, so that the first electrical plug connector 401 and the second electrical plug connector 402 can be staggered. According to actual needs, the respective lateral positions of the first electrical plug connector 401 and the second electrical plug connector 402 can be adjusted to correspond to the positions of the plug connection ends on the electric control board 120 and the motor body 220, respectively, thereby improving the overall adaptability of the heat insulation board 300 and the conductive element 400. When the size of the electric control board 120 or the motor body 220 changes, the distribution position of the conductive element 400 in the partition 300 is redesigned, and the integrated structure of the heat insulation board 300 and the conductive element 400 is simply replaced, which is more flexible and convenient.

[0064] Combined with the above analysis, when the first electrical plug connector 401 and the second electrical plug connector 402 are staggered by the conductive connector 403, the structure of the conductive element 400 is more complicated than that of the traditional linear pin, and the positioning difficulty is higher during the integral molding process with the board body 310. At this time, it is more preferable to adopt a two-step molding method. Taking injection molding as an example, in some embodiments, it is preferred to firstly integrally mold the conductive body and the outer shell, and the first electrical plug connector 401 and the second electrical plug connector 402 are extended outside the outer shell; and then the outer shell and the board body 310 are integrally molded by injection molding. Figure 6 The structure diagram of the conductive body in the conductive element 400 is shown, and the two ends of the conductive body are respectively the first electrical plug connector 401 and the second electrical plug connector 402, and the plug connectors at the two ends are electrically connected through the conductive connector 403 extending laterally. At this time, the conductive body is firstly injection molded once to ensure the relative position and size of the conductive body are accurate, and the outer layer of the injection molded outer shell forms a certain thickness of strength protection to avoid the conductive body being directly molded with the heat insulation board 300 and being deformed and displaced due to the large injection pressure. The conductive body is firstly injection molded once as shown in the figure. Figure 7 The independent module shown in the figure is then subjected to secondary injection molding of the separately molded conductive element 400. At this time, the relative position of the conductive body has been fixed, and the strength relative to a single conductive body has also been effectively enhanced. It is difficult to deform during the secondary injection molding stage of the molded thermal insulation board 300, thereby ensuring product accuracy and strength.

[0065] Combination Figure 3As shown, in some embodiments, in order to achieve specific circuit connectivity between the first electrical plug connector 401 and the second electrical plug connector 402, mounting holes 111 communicating with their respective inner cavities are respectively provided on the box base 110 and the machine base 210, and the first electrical plug connector 401 is electrically connected to the electric control board 120 through the mounting hole 111 on the box base 110, and the second electrical plug connector 402 is electrically connected to the motor body 220 through the mounting hole 111 on the machine base 210. In order to further improve the overall sealing performance of the heat insulation and transfer integrated design, sealing members 315 are also respectively provided between the mounting holes 111 on the box base 110 and the machine base 210 and the contact surface of the board body 310 for sealing. The seal 315 can be in various forms such as a sealing ring, sealing soft rubber, etc., and the setting position of the seal 315 can be located on the board body 310 or on the box seat 110 and the machine base 210. The focus is on effectively sealing the intersection contact surface between the mounting hole 111 and the board body 310, that is, the seal 315 is set between the connection part of the board body 310 and the box seat 110, and between the connection part of the board body 310 and the machine base 210, so as to further seal and achieve the effect of preventing condensation water.

[0066] It should be noted that, in some embodiments, it is further preferred that the outer shell outside the conductive element 400 not only extends beyond the board surface of the board body 310, but further extends to the inside of the mounting holes 111 on the box seat 110 and the machine base 210, that is, the outer shell outside the first electrical plug connector 401 extends into the mounting hole 111 of the box seat 110, and the outer shell outside the second electrical plug connector 402 extends into the mounting hole 111 on the machine base 210, so that the outer shell has stronger support and protection for the first electrical plug connector 401 and the second electrical plug connector 402, thereby preventing them from being deformed during the low-strength injection molding production or installation process.

[0067] As one of the specific implementations of the seal 315, in some embodiments, combined with Fig.10 As shown, the board surface of the board body 310 facing the box seat 110 is provided with a first annular wall 311 protruding outward, a groove space is formed in the first annular wall 311, the first electrical plug connector 401 passes through the groove space of the first annular wall 311, and the sealing member 315 is arranged in the groove space; the outside of the mounting hole 111 on the box seat 110 is provided with a mounting annular wall 112 protruding from the box seat 110, and the rear end of the mounting annular wall 112 is fitted into the groove space and abuts against the sealing member 315. Figure 3As shown, in practice, the seal 315 is preferably sealed with injection soft glue, that is, the board body 310 and the conductive element 400 are integrally molded with a first ring wall 311 protruding outward, and then the sealing soft glue is injected into the formed groove space. When the board body 310 and the box seat 110 are installed, the installation ring wall 112 on the box seat 110 can be embedded in the sealing soft glue downward, thereby ensuring effective sealing, which is not only conducive to blocking heat transfer, but also avoids the further formation of condensed water. Similarly, the seal 315 between the board body 310 and the base 210 adopts the same setting. That is, a second annular wall 313 protruding outward is provided on the plate surface of the plate body 310 facing the side of the base 210, and a groove space is formed in the second annular wall 313. The second electrical plug connector 402 passes through the groove space of the second annular wall 313. The seal 315 is injection-molded in the groove space with a sealing soft glue, and the outside of the mounting hole 111 of the base 210 also has a mounting annular wall that can cooperate with and abut against the sealing soft glue to achieve effective sealing.

[0068] In some embodiments, the board body 310 is preferably provided with a protective wall 314 protruding outward on the board surface facing the base 210, and an open cavity for accommodating the second electrical plug connector 402 is formed in the protective wall 314, and the second electrical plug connector 402 is hidden in the open cavity. Fig.11 As shown, the protective wall 314 completely covers the second electrical plug connector 402 inside, thereby forming a peripheral protective cap. When the second electrical plug connector 402 is connected to the connecting end of the motor body 220, the protective wall 314 can be set on the outside of the connection position between the two to be isolated from the outside, forming a peripheral insulation protection to avoid the occurrence of conductive breakdown. Specifically, when the board body 310 has a second ring wall 313 on the board surface facing the side of the base 210, the protective wall 314 is set inside the second ring wall 313, and the extension length of the protective wall 314 exceeds the second ring wall 313, and a sealing member 315 is provided between the protective wall 314 and the second ring wall 313.

[0069] When further sealing is performed in the form of injection molding of soft glue, in some embodiments, it is preferred that a circle of first convex ribs 413 protruding outwards is formed on the upper part of the outer shell of the conductive element 400, and the first convex ribs 413 are located inside the groove space of the first annular wall 311, and the upper surface of the first convex ribs 413 is flush with the upper surface of the seal 315 in the first annular wall 311. In practice, when the soft glue is injection molded, the first convex ribs 413 can form a step-like structure on the outer shell, which not only enhances the structural strength, but also makes it easier for the positioning mold to press on the first convex ribs 413 from above to fix the conductive element 400. At this time, the soft glue is injected into the space below the first convex ribs 413 to avoid the soft glue being squeezed out between the contact surface of the positioning mold and the outer shell to cause flash, thereby effectively ensuring the quality of soft glue injection molding. Similarly, the lower part of the outer shell of the conductive element 400 is also formed with a circle of second convex ribs 414 protruding outwards. The second convex ribs 414 are located in the groove space of the second annular wall 313. The second convex ribs 414 are formed into a step shape to facilitate the mold to be pressed and positioned, which is also conducive to ensuring the quality of the sealing soft glue injection molding. Specifically, the first convex rib 413 is located on the outer shell of the first electrical plug connector 401, and the second convex rib 414 is located on the outer shell of the second electrical plug connector 402. Figure 7 Corresponding to the sequential distribution of the first electrical plug connector 401, the conductive connector 403 and the second electrical plug connector 402, the outer shell may include a first injection molded part 410, a connecting injection molded part 411 and a second injection molded part 412 in sequence, the first convex rib 413 is arranged on the periphery of the first injection molded part 410, and the second convex rib 414 is arranged on the periphery of the second injection molded part 412.

[0070] In order to ensure accurate positioning of the conductive element 400 during the two molding processes, in some embodiments, the outer shell of the conductive element 400 is provided with multiple sets of molding holes on the two oppositely distributed side surfaces, and the molding holes extend inward to expose the conductive body inside, and at least two sets of molding holes are provided on each side surface of the outer shell along the length extension direction of the conductive body. Figure 6-Figure 8As shown, specifically, near the lower area of ​​the first electrical plug connector 401 near the conductive connector 403, that is, near the lower area of ​​the first injection molding part 410, three first holes 416 are formed on the two opposite sides of the outer shell of this area; and near the upper area of ​​the second electrical plug connector 402 near the conductive connector 403, that is, near the upper area of ​​the second injection molding part 412, three second holes 415 are formed on the two opposite sides of the outer shell of this area, the first hole 416 extends inward to expose the first electrical plug connector 401 inside, and the second hole 415 extends inward to expose the second electrical plug connector 402 inside. The three first holes 416 and the three second holes 415 on each side correspond to each other, corresponding to the upper and lower positions of the conductive body, respectively, so that each conductive pin has two upper and lower holes on both sides for positioning. During the injection molding process, the positioning parts on both sides respectively press the conductive body from the top and bottom for positioning, and the first hole position 416 and the second hole position 415 structure are formed after injection molding. After one injection molding is completed, in the secondary injection molding stage of the formed insulation board 300, the interior of the insulation board 300 is filled and covered with the above-mentioned first hole position 416 and the second hole position 415 positions, further enhancing the overall positioning accuracy of the conductive element 400 and preventing deformation or displacement.

[0071] In practice, the integrated configuration of the conductive element 400 and the board body 310 also places higher requirements on the installation accuracy and flexibility of the overall structure. In some implementation cases, the design is further optimized to provide a waist-shaped hole as a plug-in connection hole on the first electrical plug connector 401, through which the fixed connector passes, and the first electrical plug connector 401 is pressed against the plug-in end of the electric control board 120, so that the first electrical plug connector 401 is in contact with the plug-in end of the electric control board 120 and is fixed and electrically connected. Specifically, a fastening bolt can be used as a fixed connector. When the first electrical plug connector 401 is connected to the electric control board 120, the fastening bolt passes through the connection holes on the plug-in end of the first electrical plug connector 401 and the electric control board 120 in sequence and is fastened, so that the first electrical plug connector 401 and the plug-in end of the electric control board 120 are pressed and fixed to achieve conductive connection. The waist-shaped hole on the first electrical plug connector 401 extends along the up and down plug-in direction, so that the fastening bolt has a certain up and down position activity space in the waist-shaped hole. Therefore, when there is a certain deviation in the position of the first electrical plug connector 401, by adjusting the position of the fastening bolt in the waist-shaped hole, the first electrical plug connector 401 and the plug-in end of the electric control board 120 can still be pressed and connected, and it has stronger installation adaptability and flexibility. The waist-shaped hole is set in the primary molding stage of the conductive element 400, that is, the primary molding stage of the conductive body and the outer shell, and can be used as a positioning hole. The mold is correspondingly provided with a positioning column embedded in the waist-shaped hole to cooperate to achieve accurate positioning of the conductive body and further ensure the accuracy of the one-piece molding.

[0072] In some embodiments, it is preferred that the plate surface area of ​​the plate body 310 can at least completely cover the end area of ​​the box seat 110 or the machine base 210. In practice, the end area of ​​the machine base 210 is generally smaller, and the plate surface of the plate body 310 can at least completely cover the rear end surface of the machine base 210, thereby fully covering the box seat 110 and the machine base 210. Barrier; similarly, when the end area of ​​the box seat 110 is smaller, the plate surface of the plate body 310 can at least completely cover the end surface of the box seat 110, thereby achieving a comprehensive barrier between the machine base 210 and the box seat 110, achieving a comprehensive and sufficient insulation effect, reducing the power consumption of the entire pump unit, and improving the power, head, power consumption, hydraulic efficiency, etc. of the pump. The first electrical plug connector 401 and the second electrical plug connector 402 are both extended and distributed along the thickness direction of the board body 310, which is convenient for direct plug-in installation. The first electrical plug connector 401 or the second electrical plug connector 402 is distributed in the peripheral edge area of ​​the board body 310, which is convenient for minimizing the overall volume of the board body 310 on the basis of meeting comprehensive isolation, and is convenient for processing. In practice, the size of the electric control board 120 is generally larger than that of the motor body 220. In the horizontal direction, the plug-in end on the electric control board 120 is more toward the outside than the plug-in end on the motor body 220. At this time, the first electrical plug connector 401 can be set in the edge area of ​​the board body 310, which can also fully adapt to the connection position of the electric control board 120. Similarly, when the horizontal size of the motor body 220 is larger, the second electrical plug connector 402 can also be set in the peripheral edge area of ​​the board body 310.

[0073] In this embodiment, the conductive element 400 is integrally molded on the thermal insulation board 300, so that the thermal insulation board 300 has the functions of thermal insulation and line connection, which reduces the number of parts and the difficulty of the assembly process, and reduces the production cost. Preferably, the conductive element 400 is first injection molded into a separate module through secondary injection molding, and then the thermal insulation board 300 is subjected to secondary injection molding, which effectively ensures the position accuracy and strength of the conductive body and prevents deformation or displacement. In practice, the injection molding quality is effectively improved, and the thermal insulation board is suitable for promotion and application.

[0074] This embodiment also provides a molding method for the heat insulation board 300, which adopts a two-step injection molding process to first mold the conductive body and the outer shell, and then mold the heat insulation board 300. The specific process is as follows:

[0075] S1, one-step injection molding: placing a conductive body into a mold for injection molding, and overmolding an outer shell around the conductive body to obtain a conductive element 400; the two ends of the conductive body are respectively a first electrical plug connector 401 and a second electrical plug connector 402, and the first electrical plug connector 401 and the second electrical plug connector 402 both extend beyond the outer shell;

[0076] S2. Secondary injection molding: placing the conductive element 400 into a mold for injection molding to form the board body 310 of the thermal insulation board 300. The first electrical plug connector 401 and the second electrical plug connector 402 on the conductive element 400 are respectively located on both sides of the board body 310 and both extend beyond the board surface of the board body 310.

[0077] Furthermore, in order to improve the sealing performance of the overall structure, it also includes:

[0078] S3. Install the seal 315: Install the seal 315 at the intersection of the first electrical plug connector 401 and the board surface of the board body 310, and at the intersection of the second electrical plug connector 402 and the board surface of the board body 310, respectively.

[0079] Furthermore, as analyzed above, when the first electrical plug connector 401 and the second electrical plug connector 402 are staggered at both ends of the conductive body along the lateral direction relative to the plug-in direction thereof, during the primary injection molding process corresponding to step S1, the molded outer shell completely wraps the conductive connector 403 and partially wraps the first electrical plug connector 401 and the second electrical plug connector 402; during the secondary injection molding process of step S2, the board body 310 completely wraps the outer shell outside the conductive connector 403 inside, and partially wraps the outer shell outside the first electrical plug connector 401 and the second electrical plug connector 402.

[0080] Furthermore, during the first injection molding process of step S1, the conductive body is positioned and installed in the injection mold, and the injection mold is provided with ejectors to tighten the conductive body from both sides. After the first injection molding, injection holes that can expose the internal conductive body are formed on both sides of the outer shell; that is, the above-mentioned first hole position 416 and second hole position 415 structure are formed. During the second injection molding process of step S2, the molded plate body 310 covers and fills the first hole position 416 and the second hole position 415 on the outer shell.

[0081] Furthermore, during the one-shot injection molding process of step S1, the conductive body is placed in the corresponding installation slot on the injection mold, and the first electrical plug connector 401 of the conductive body is provided with a through hole, i.e., the waist-shaped hole, and the mold installation slot has a positioning column that fits into the through hole; after the conductive body is positioned and installed, injection molding begins. The waist-shaped hole design not only assists in precise positioning at this time, but also enables a stronger adaptability when the first electrical plug connector 401 is installed and fastened with the plug-in end on the electric control board 120.

[0082] Furthermore, in the secondary injection molding of step S2, a first annular wall 311 and a second annular wall 313 protruding outward are respectively formed on the plate surfaces on both sides of the plate body 310, and groove spaces are formed in the first annular wall 311 and the second annular wall 313. The first electrical plug connector 401 extends from the first annular wall 311, and the second electrical plug connector 402 extends from the second annular wall 313; in step S3, the sealing member 315 is correspondingly installed in the groove spaces of the first annular wall 311 and the second annular wall 313, and is sealed around the outer periphery of the first electrical plug connector 401 and the second electrical plug connector 402. Furthermore, in the secondary injection molding stage of step S2, a protective wall 314 protruding outward is formed on the board surface of the board body 310 in the second annular wall 313, and the second electrical plug connector 402 is hidden in the open cavity formed in the protective wall 314; at this time, corresponding to step S3, a sealing member 315 is arranged between the protective wall 314 and the second annular wall 313. The sealing member 315 can be in the form of a sealing soft glue or a sealing ring.

[0083] Furthermore, in the first injection molding stage of step S1, a first convex rib 413 protruding outward is formed on the upper part of the outer shell of the first electrical plug connector 401; in step S3, the seal 315 is injection molded with a sealing soft glue, and the upper surface of the seal 315 after molding is flush with the upper surface of the first convex rib 413. The provision of the first convex rib 413 is not only conducive to enhancing the structural strength, but also in step S3, a positioning member is provided on the mold to press downward on the first convex rib 413 to fix the conductive element 400, and the injection molding starts from the space below the first convex rib 413. Combined with the above analysis, the use of the first convex rib 413 can avoid the situation where the soft glue is squeezed out between the contact surface of the positioning mold and the outer shell to cause flash.

[0084] Furthermore, in the secondary injection molding stage of step S2, the bottom walls of the groove spaces of the first annular wall 311 and the second annular wall 313 are respectively formed with outwardly protruding reinforcing ribs, and in step S3, the seal 315 is injection molded to cover the reinforcing ribs. The reinforcing ribs are not only conducive to enhancing the structural strength, but also make the seal 315 less likely to shrink and deform during the injection molding stage, thereby ensuring the quality of the sealing molding. In practice, the seal 315 can be injection molded with a sealing soft glue made of TPE or TPU; the injection molding of steps S1 and S2 can be injection molded with a hard glue made of PA66+30GF.

[0085] The protection scope of the present invention is limited only by the claims. With the help of the teachings of the present invention, those skilled in the art will easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. A method for forming a heat insulation board for a pump, wherein the heat insulation board (300) is used to be installed between a control box (100) and a motor (200) of a pump to block heat transfer; characterized in that: Methods include: S1, one-step injection molding: placing a conductive body into a mold for injection molding, and overmolding an outer shell around the conductive body to obtain a conductive element (400); the two ends of the conductive body are respectively a first electrical plug connector (401) and a second electrical plug connector (402), and both the first electrical plug connector (401) and the second electrical plug connector (402) extend beyond the outer shell; S2, secondary injection molding: placing the conductive element (400) into a mold for injection molding to form the board body (310) of the heat insulation board (300), wherein the first electrical plug connector (401) and the second electrical plug connector (402) on the conductive element (400) are respectively located on two sides of the board body (310) and both extend beyond the board surface of the board body (310).

2. A method for forming a heat insulation board for a pump according to claim 1, characterized in that: Also includes: S3. Installing a sealing member (315): Installing sealing members (315) at the intersection of the first electrical plug connector (401) and the board surface of the board body (310), and at the intersection of the second electrical plug connector (402) and the board surface of the board body (310).

3. A method for forming a heat insulation board for a pump according to claim 1, characterized in that: The first electrical plug connector (401) and the second electrical plug connector (402) are staggeredly distributed at two ends of the conductive body along a transverse direction relative to the plugging and unplugging direction thereof, and the first electrical plug connector (401) and the second electrical plug connector (402) are electrically connected via a conductive connector (403); During the one-step injection molding process, the molded outer shell completely wraps the conductive connector (403) and partially wraps the first electrical plug connector (401) and the second electrical plug connector (402); During the secondary injection molding process, the plate body (310) completely wraps the outer shell outside the conductive connector (403) inside, and partially wraps the outer shells outside the first electrical plug connector (401) and the second electrical plug connector (402).

4. A method for forming a heat insulation board for a pump according to claim 1, characterized in that: During the one-shot injection molding process, the conductive body is positioned and installed in the injection mold, and the injection mold is provided with ejectors to hold the conductive body from both sides. After the one-shot injection molding, injection holes are formed on both sides of the outer shell to expose the internal conductive body. During the secondary injection molding process, the molded plate body (310) covers and fills the injection molding holes on the outer shell.

5. A method for forming a heat insulation board for a pump according to claim 1, characterized in that: During a single injection molding process, the conductive body is placed in a corresponding installation slot on the injection mold, and a through hole is provided on the first electrical plug connector (401) of the conductive body, and a positioning column is provided in the mold installation slot to fit and embed in the through hole; after the conductive body is positioned and installed, injection molding begins.

6. A method for forming a heat insulation board for a pump according to claim 2, characterized in that: During secondary injection molding, a first annular wall (311) and a second annular wall (313) protruding outward are respectively formed on the plate surfaces on both sides of the plate body (310), and a groove space is formed in the first annular wall (311) and the second annular wall (313), and the first electrical plug connector (401) extends from the first annular wall (311), and the second electrical plug connector (402) extends from the second annular wall (313); In step S3, the sealing member (315) is installed in the groove space of the first annular wall (311) and the second annular wall (313) respectively, and is sealed around the outer periphery of the first electrical plug connector (401) and the second electrical plug connector (402).

7. A method for forming a heat insulation board for a pump according to claim 6, characterized in that: In the secondary injection molding stage, a protective wall (314) protruding outward is formed on the plate surface of the plate body (310) inside the second annular wall (313), and the second electrical plug connector (402) is hidden in an open cavity formed in the protective wall (314); in step S3, a sealing member (315) is arranged between the protective wall (314) and the second annular wall (313).

8. A method for forming a heat insulation board for a pump according to claim 6, characterized in that: In the primary injection molding stage, a first convex rib (413) protruding outward is molded on the upper portion of the outer shell of the first electrical plug connector (401); in step S3, the seal (315) is injection molded using a sealing soft glue, and the upper surface of the seal (315) after molding is flush with the upper surface of the first convex rib (413).

9. A method for forming a heat insulation board for a pump according to claim 8, characterized in that: In step S3, a positioning piece is provided on the mold and is pressed downwardly onto the first convex rib (413) to fix the conductive element (400), and the glue injection and molding are started from the space below the first convex rib (413).

10. A method for forming a heat insulation board for a pump according to claim 8, characterized in that: In the secondary injection molding stage, outwardly protruding reinforcing ribs are respectively formed on the bottom walls of the groove spaces of the first annular wall (311) and the second annular wall (313), and in step S3, the sealing member (315) is injection molded to cover the reinforcing ribs.

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