A wax injection mold for a condenser water pump

Abstract

The utility model discloses a kind of wax injection moulds for condensate water machine pump, including the first mould body with first cavity, the second mould body with hollow cavity being cooperatively arranged above the first mould body and mould core, and first cavity and hollow cavity can be spliced one for the main cavity of forming mould main body;First side plug block and second side plug block are detachably connected with the front and back sides of main cavity respectively, first side plug block and second side plug block can be cooperated with main cavity to be used for forming lug ear;Mould core has a with main cavity adaptation male mould core, the both ends of male mould core are respectively with first plug block and second plug block abut, recessed portion is provided on male mould core, which is inward recessed to be used for forming runner hole, one side of recessed portion is provided with a first cavity forming portion, main cavity is provided with the second cavity forming portion adapted with first cavity forming portion, first cavity forming portion and second cavity forming portion are used for forming the cavity of wax mould, the complex structure of condensate water machine pump wax mould can be synchronously formed, and product precision is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wax mold forming technology, specifically relating to a wax injection mold for a condensate pump. Background Technology

[0002] The performance of a condensate pump depends on the smoothness of its internal flow channels and the stability of its external mounting structure. Therefore, its wax mold needs to simultaneously form multiple complex features: on the one hand, the pump body needs to have U-shaped flow channel holes to guide the flow of condensate, and a through cavity (for venting, draining, or guiding) needs to be formed on one side of the flow channel holes to communicate with the outside. This type of internal cavity structure has the characteristics of many corners and irregular spatial shape; on the other hand, the pump body needs to be equipped with U-shaped holes for quick installation and fixation of the pump body and the base.

[0003] Traditional wax injection molds often employ a fixed cavity design. For irregularly shaped cavities such as U-shaped runner holes and side passages in wax models, it's difficult to directly form them through a single mold-closing action. This often requires repeated manual adjustments or secondary processing, leading not only to excessive surface roughness of the runners (affecting the pump's fluid delivery efficiency) but also to misalignment between the passages and runner holes due to processing errors, disrupting the pump's pressure balance. For lugs with U-shaped holes, existing molds often involve split molding followed by assembly, which easily creates gaps at the joints, resulting in defects such as pinholes and flash during subsequent metal casting. Therefore, designing a wax injection mold capable of forming the complex structure of a condenser pump wax model in a single operation is essential to improve wax model accuracy and production efficiency, thereby reducing the overall manufacturing cost of the condenser pump. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a wax injection mold for condensate pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wax injection mold for a condensate pump is used to process and form a wax model with the same structure as the condensate pump. The wax model includes a mold body, a U-shaped flow channel hole inside the mold body, a through cavity distributed on one side of the flow channel hole and extending outward through the mold body, and two supports respectively provided on the outside of the mold body, each having a U-shaped hole. The wax injection mold for the condensate pump includes a first mold body with a first cavity, a second mold body fitted above the first mold body and having a hollow cavity, and a mold core. The first cavity and the hollow cavity can be assembled into a main cavity for forming the mold body. A first insert and a second insert are detachably connected to both ends of the main cavity. A first side insert and a second side insert are detachably connected to the front and rear sides of the main cavity, respectively. The first side insert and the second side insert can cooperate with the main cavity to form the supports. The mold core has a punch core adapted to the main cavity. The two ends of the punch core abut against the first insert block and the second insert block, respectively. The punch core has an inwardly recessed portion for forming the flow channel hole. A first through cavity forming portion is provided on one side of the recessed portion. A second through cavity forming portion with a shape adapted to the first through cavity forming portion is provided at the corresponding position of the main cavity. When the mold core is inserted into the main cavity, the first through cavity forming portion and the second through cavity forming portion can cooperate with each other to form the through cavity.

[0006] Furthermore, the first mold body is provided with a first slot that extends outward and is adjacent to one end of the first cavity, and the first slot can be used to insert the first insert block; the first mold body is provided with a second slot at one end away from the first slot that is adjacent to the other end of the first cavity, and the second slot extends outward and can be used to insert the second insert block.

[0007] Furthermore, the upper surface of the first mold body is provided with two symmetrically arranged molding grooves, and the lower surface of the second mold body is also provided with two molding grooves. The molding grooves distributed on the second mold body correspond one-to-one with the two molding grooves located on the first mold body. When the first mold body and the second mold body are molded together, the two molding grooves in opposite positions can be combined to form a support ear molding groove for molding the support ear. The molding groove includes a first molding part that is recessed downward from the upper end of the first mold body or recessed upward from the lower end of the second mold body, an arc-shaped recessed part integrally formed on one end of the first molding part near the first cavity, and a second molding part that extends from one end through the first cavity to the first molding part through the arc-shaped recessed part to the first molding part.

[0008] Furthermore, the first side insert and the second side insert have the same structure, and the first side insert and the second side insert are respectively inserted into the two support ear forming grooves; The first side insert includes an insert body located outside the first mold and the second mold, an insert segment fixed to one side of the insert body, an arc end fixed to the insert segment, and a U-shaped recessed groove extending from the upper end face of the insert segment around the arc end and extending to the lower end face of the insert segment. The insert segment is adapted to be connected to the first molding part, and the arc end is adapted to be connected to the arc recessed part.

[0009] Furthermore, the hollow cavity includes a first molding cavity that is assembled with the first cavity to form the mold body and a second molding cavity integrally formed on the upper end of the first molding cavity. The inner wall of the first molding cavity is provided with two concave groups. After the mold is closed, the two concave groups are respectively distributed on both sides of the punch core and adjacent to the second insert block. Each concave group includes two spaced concave portions. Each concave portion is recessed outward from the inner wall of the first molding cavity. A plurality of concave portions can form a plurality of corresponding first protrusions on the outer wall of the mold body.

[0010] Furthermore, the mold core also includes a core body, which includes a first core body integrally formed on the upper end of the punch core and adapted to the second molding cavity, and a second core body fixed to the upper end of the first core body. After the mold is closed, the second core body is exposed outside the hollow cavity.

[0011] Furthermore, the second core has a recessed cavity that is recessed towards the punch core, and a holding rod is provided in the recessed cavity.

[0012] Furthermore, the punch core has an inclined section. On the front projection surface of the punch core, the first through cavity forming part includes a forming part one protruding outward from the inclined section, a bent section with one end connected to the forming part one, and an arc concave section connected to the other end of the bent section. Both the front and rear ends of the bent section have a first recessed notch. The first recessed notch is used to form a second protrusion located on the inner wall of the mold body. The end face of the arc concave section can abut against the second insert block, and after the arc concave section abuts against the second insert block, two second recessed notches can be formed. The two second recessed notches are respectively provided on one side of the first recessed notch. The second recessed notches are used to form the third protrusion located on the inner wall of the mold body.

[0013] Furthermore, the second cavity forming part includes a second forming part disposed in the first cavity and whose shape is adapted to and can abut against the first forming part, a third forming part located on one side of the second forming part and whose shape is adapted to and can abut against the bent section, and an arcuate protrusion. The end of the first cavity with the smallest cross-sectional area has an arcuate protrusion, and the arcuate protrusion can be adapted to the arcuate concave section.

[0014] Furthermore, the recessed portion extends from the front end of the punch core to its rear end, and the middle part of the recessed portion has a solid area. The cross-section of the solid area is a solid U-shaped structure, and both ends of the solid U-shaped structure are rounded corners.

[0015] In summary, the beneficial effects of this utility model are as follows: 1. Synchronous molding of complex cavities avoids the defects of separate processing. Through the coordinated design of the main cavity assembled from the "first mold body + second mold body", the recessed part of the punch core, the through cavity forming part and the side insert block, the mold body, U-shaped flow channel hole, through cavity and support ear with U-shaped hole of wax model can be formed simultaneously in one go, without the need for splicing or secondary processing after separate molding. It avoids the structural misalignment caused by traditional splicing (such as the misalignment between the U-shaped flow channel hole and the through cavity) and eliminates the problem of excessive surface roughness caused by manual finishing, ensuring the relative position accuracy of each structure of wax model. 2. Precise molding of inner / outer wall protrusions, giving the pump body practical function. With the help of the "reverse molding" of the inner concave group of the first molding cavity, the first protrusion can be formed on the outer wall of the mold body; through the first recessed notch of the punch core bending section, the second recessed notch of the arc concave section and the second insert block, the second protrusion and the third protrusion on the inner wall of the mold body are formed simultaneously. The protrusion is integrally molded with the wax model, avoiding positional misalignment and insufficient connection strength caused by traditional milling. This improves the pump body assembly accuracy, optimizes the water flow state within the flow channel, reduces turbulence losses, and enhances pump operating efficiency. Third, a bidirectional positioning structure prevents core misalignment. The first and second inserts at both ends of the main cavity are precisely inserted into slots and directly abut against both ends of the punch core, forming axial bidirectional positioning. The first core of the punch core matches the second forming cavity of the hollow cavity, providing radial support. This dual positioning resists core movement or tilting caused by wax impact during wax injection, ensuring the stability of the position of the punch core recess (forming the U-shaped flow channel hole), avoiding uneven flow channel wall thickness, and guaranteeing structural consistency of each wax model in mass production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the wax model processed by this utility model. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of the wax model processed by this utility model. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the structure of a wax injection mold for a condenser pump provided by this utility model.

[0019] Figure 4 yes Figure 3 Exploded view.

[0020] Figure 5 This is a structural schematic diagram of the first mold and the second mold in the mold-closing state of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the first module in this utility model.

[0022] Figure 7 yes Figure 6 A magnified view of part A in the middle.

[0023] Figure 8 This is a three-dimensional structural diagram of the first side insert block in this utility model.

[0024] Figure 9 This is a three-dimensional structural diagram of the second module in this utility model.

[0025] Figure 10 This is a top view of the mold core in this utility model.

[0026] Figure 11 This is a schematic diagram of the bottom surface of the mold core in this utility model.

[0027] Figure 12 This is a schematic diagram of the orthographic projection of the mold core after it abuts against the first and second insert blocks in this utility model.

[0028] Figure 13 This is a front view of the mold core in this utility model.

[0029] Figure 14 yes Figure 13 Sectional view along the AA direction.

[0030] In the diagram, 100-wax model, 110-mold body, 120-plate, 121-running channel hole, 130-through cavity, 140-support ear, 141-U-shaped hole, 150-first protrusion, 160-second protrusion, 170-third protrusion, 180-through hole position, 200-first mold body, 210-first cavity, 220-first slot, 230-second slot, 240-molding groove, 241-first molding part, 242-circular arc recess, 243-second molding part, 250-second through cavity molding part, 251-molding section two, 252-molding section three, 253-circular arc protrusion, 260-support ear molding groove, 300-second mold body, 310-hollow cavity, 311-first molding cavity, 31 2-Second molding cavity, 3110-Inner recess, 400-Mold core, 410-Punch core, 411-Inclined section, 412-Recessed section, 4120-Solid area, 420-Core, 421-First core, 422-Second core, 4220-Recessed cavity, 4220A-Holding rod, 430-First through cavity molding section, 431-Molding section one, 432-Bending section, 4320-First recessed notch, 433-Circular arc concave section, 4330-Circular hole protrusion, 434-Second recessed notch, 500-First insert, 600-Second insert, 700-First side insert, 710-Insert body, 720-Interlocking section, 730-Circular arc end, 740-U-shaped recessed groove, 800-Second side insert. Detailed Implementation

[0031] The present invention will be further explained below with reference to specific illustrations.

[0032] Please see Figure 1 and Figure 2 The processed wax mold 100 has the same structure as the condensate pump. The wax mold 100 includes a mold body 110, a U-shaped flow channel hole 121 inside the mold body 110, a through cavity 130 distributed on one side of the flow channel hole 121 and able to penetrate outward through the mold body 110, and two support ears 140 respectively provided on the outside of the mold body 110, each having a U-shaped hole 141. The outer wall of the mold body 110 also has a number of first protrusions 150, and the first protrusions 150 on the same side are arranged at intervals, while the inner wall of the mold body 110 has a number of second protrusions 160.

[0033] Please see Figure 3 and Figure 4 This utility model provides a wax injection mold for a condensate pump, comprising a first mold body 200 having a first cavity 210, a second mold body 300 fitted above the first mold body 200 and having a hollow cavity 310, and a mold core 400. Please refer to [link / reference]. Figure 5The first cavity 210 and the hollow cavity 310 can be combined to form a main cavity for molding the main body 110. A first insert 500 and a second insert 600 are detachably connected to both ends of the main cavity. A first side insert 700 and a second side insert 800 are detachably connected to the front and rear sides of the main cavity, respectively. The first side insert 700 and the second side insert 800 can cooperate with the main cavity to form the support ear 140. The mold core 400 has a punch core 410 adapted to the main cavity. The two ends of the punch core 410 abut against the first insert 500 and the second insert 600, respectively. The punch core 410 is provided with an inwardly recessed portion 412 for forming the flow channel hole 121. A first through cavity forming portion 430 is provided on one side of the recessed portion 412. A second through cavity forming portion 250 with a shape adapted to the first through cavity forming portion 430 is provided at the corresponding position of the main cavity. After the mold core 400 is inserted into the main cavity, the first through cavity forming part 430 and the second through cavity forming part 250 can cooperate with each other to form the through cavity 130. This wax injection mold can simultaneously form multiple key structures to ensure dimensional accuracy. The mold forms the main cavity by assembling the first mold body 200 and the second mold body 300. The U-shaped flow channel hole 121 of the wax model 100 is directly formed by the recessed part 412 of the punch core 410. At the same time, the through cavity 130 penetrating the mold body 110 is accurately formed by the matching structure of the first through cavity forming part 430 and the second through cavity forming part 250. The first side insert 700 and the second side insert 800 on the front and rear sides of the main cavity cooperate with the support ear forming groove 240 to form the support ear 140 with the U-shaped hole 141 in one step. The entire molding process does not require disassembly, avoiding structural misalignment caused by "separate molding + splicing" in traditional processes. It ensures the relative positional accuracy of U-shaped flow channel hole 121, through cavity 130, support ear 140 and U-shaped hole 141, while avoiding the problem of excessive surface roughness caused by manual finishing.

[0034] Please see Figure 6 The first mold body 200 has a first slot 220 extending outward and adjacent to one end of the first cavity 210, into which the first insert 500 can be inserted. At the end of the first mold body 200 away from the first slot 220, there is a second slot 230 adjacent to the other end of the first cavity 210, extending outward and into which the second insert 600 can be inserted. The first insert 500 and the second insert 600, on the one hand, provide axial bidirectional positioning for the mold core 400 (punch core 410) by abutting against both ends of the mold core 400, preventing the mold core 400 from shifting or tilting due to wax impact during wax injection; on the other hand, the end face contours of the inserts directly form the molding surfaces at both ends of the mold body 110 of the wax mold 100, allowing for precise shaping of the shape and size of the ends of the wax mold 100. This integrated "positioning + molding" design eliminates the need for separate mold core 400 positioning parts and wax mold 100 end molding parts, simplifying the mold structure and reducing the accumulation of errors caused by the cooperation of multiple parts.

[0035] Please continue reading. Figure 6 and Figure 7 The upper surface of the first mold body 200 is provided with two symmetrically arranged molding grooves 240, and the lower surface of the second mold body 300 is also provided with two molding grooves 240. The molding grooves 240 distributed on the second mold body 300 correspond one-to-one with the two molding grooves 240 located on the first mold body 200. When the first mold body 200 and the second mold body 300 are closed, the two molding grooves 240 in opposite positions can be combined to form a support ear molding groove 240 for molding the support ear 140. The molding groove 240 includes a first molding part 241 that is recessed downward from the upper surface of the first mold body 200 or recessed upward from the lower surface of the second mold body 300, an arc-shaped recessed part 242 integrally formed on the first molding part 241 near the first cavity 210, and a second molding part 243 that extends from one end through the first cavity 210 and the other end through the arc-shaped recessed part 242 to the first molding part 241. After mold closing, the upper and lower corresponding forming grooves 240 are assembled into a complete support ear forming groove 240, which can form the support ear 140 with U-shaped hole 141 on the outside of the wax model 100 in one go, without the need to disassemble and then assemble. Compared with the traditional method of separately making the support ear 140 and then gluing it, this method avoids the problem of insufficient strength of the wax model 100 caused by splicing gaps and the generation of sand holes / bursts during subsequent metal pouring. At the same time, it ensures a natural transition between the support ear 140 and the mold body 110, which meets the load-bearing requirements during pump installation.

[0036] Please see Figure 8 The first side insert 700 and the second side insert 800 have the same structure, and the first side insert 700 and the second side insert 800 are respectively inserted into the two support ear forming grooves 240. The two side inserts have identical structures, enabling standardized production of mold components (eliminating the need for separate design and processing of two types of inserts), thus reducing mold manufacturing costs. Simultaneously, installation eliminates the need to distinguish between left and right, allowing workers to quickly align and insert the inserts, reducing operational errors and improving mold changeover and production efficiency. The first side insert 700 includes an insert body 710 located outside the first mold body 200 and the second mold body 300, an insert segment 720 fixed to one side of the insert body 710, an arc-shaped end 730 fixed to the insert segment 720, and a U-shaped recessed groove 740 extending from the upper surface of the insert segment 720 around the arc-shaped end 730 to the lower surface of the insert segment 720. The insert segment 720 is adapted to and connected to the first molding part 241, while the arc-shaped end 730 is adapted to and connected to the arc-shaped recessed part 242. Warm wax is filled into the second molding part 243 to form the main body of the support ear 140. The radius of curvature of the arc end 730 is completely consistent with the arc recess 242. The outer dimensions of the insertion section 720 are completely matched with the recess dimensions of the first molding part 241. After the first side insertion block 700 and the second side insertion block 800 are inserted, they can form the U-shaped hole 141 on the support ear 140.

[0037] Please see Figure 9 The hollow cavity 310 includes a first molding cavity 311 that is assembled with the first cavity 210 to form the mold body 110, and a second molding cavity 312 integrally formed on the upper end of the first molding cavity 311. The inner wall of the first molding cavity 311 is provided with two concave groups. After the mold is closed, the two concave groups are respectively distributed on both sides of the punch core 410 and adjacent to the second insert block 600. Each concave group includes two spaced concave portions 3110. Each concave portion 3110 is recessed outward from the inner wall of the first molding cavity 311. Several concave portions 3110 can form several corresponding first protrusions 150 on the outer wall of the mold body 110. After the first molding cavity 311 of the hollow cavity 310 is assembled with the first cavity 210 of the first mold body 200, it directly forms the cavity of the mold body 110 of the wax model 100, which can completely form the basic shape of the mold body 110. The integrally formed second molding cavity 312 provides space for the subsequent installation of the mold core 400, avoiding the complexity of the mold caused by designing a separate positioning structure for the mold core 400. This "molding + assembly space" integrated design simplifies the overall mold structure, reduces the error in the fit of multiple parts, and ensures the molding accuracy of the mold body 110. The concave portion 3110 of the inner wall of the first molding cavity 311 forms a corresponding first protrusion 150 on the outer wall of the wax mold 100 mold body 110 through the principle of "reverse molding". Compared with the traditional method of "additionally processing the protrusion after the wax mold 100 is formed", no secondary operation is required, which avoids the displacement of the protrusion position caused by processing errors and ensures the connection strength between the protrusion and the mold body 110 (no splicing gap). The first protrusion 150 on the outer wall of the mold body 110 can be used as a positioning reference (to assist the alignment of the pump body with other parts) or a reinforcing rib (to improve the deformation resistance of the outer wall of the pump body) in the subsequent pump body assembly, meeting the actual use requirements of the condensate pump.

[0038] The first cavity 210 is provided with a circular channel communicating with the outside, and the punch core 410 is provided with a circular hole protrusion 4330 corresponding to the circular channel in the mold closing state. After the warm wax is injected, the circular hole protrusion 4330 and the circular channel can be used to form the circular through hole position 180.

[0039] The mold core 400 also includes a core body 420. The core body 420 includes a first core body 421 integrally formed on the upper end of the punch core 410 and adapted to the second molding cavity 312, and a second core body 422 fixed to the upper end of the first core body 421. After mold closing, the second core body 422 is exposed outside the hollow cavity 310. The segmented core body 420 precisely matches the hollow cavity 310, ensuring both molding and positioning requirements. The first core body 421 is adapted to the second molding cavity 312 of the hollow cavity 310. After mold closing, it can fill the space of the second molding cavity 312, preventing wax from flowing into this area and forming redundant structures during wax injection (ensuring that the wax mold 100 only molds the main body 110, without redundant parts). At the same time, the first core body 421 is integrally formed with the punch core 410, which can provide axial support for the punch core 410, further preventing the punch core 410 from tilting due to wax impact during wax injection, and ensuring the molding accuracy of the U-shaped flow channel hole 121.

[0040] Please see Figure 10 The second core 422 has a recessed cavity 4220 that is recessed towards the punch core 410, and a holding rod 4220A is provided inside the recessed cavity 4220. The holding rod 4220A inside the recessed cavity 4220 provides a stable force application point for workers or automated equipment (such as mechanical grippers). Compared with directly gripping the outer wall of the second core 422420 (which is prone to slippage), the holding rod 4220A can achieve "precise force application" through manual gripping or mechanical clamping, ensuring that the force can be applied smoothly along the axial direction when pulling the core, and avoiding tilting or jamming of the mold core 400 due to improper force application. At the same time, the presence of the holding rod 4220A also lowers the physical threshold of the core pulling operation. Especially for the larger mold core 400, the lever principle (if the length of the holding rod 4220A is suitable) can be used to pull the core with less effort, improving the safety of operation (reducing the risk of mold collision caused by hand slippage).

[0041] Please see Figure 11 and Figure 12 The punch core 410 has an inclined section 411. On the orthographic projection plane of the punch core 410, the first cavity 130 forming part includes a forming portion 431 protruding outward from the inclined section 411, a bent section 432 connected to the forming portion 431 at one end, and an arc-shaped concave section 433 connected to the other end of the bent section 432. Both the front and rear ends of the bent section 432 have a first recessed notch 4320, which is used to form a second protrusion 160 located on the inner wall of the mold body 110. Please refer to [link / reference]. Figure 12The end face of the arc-shaped concave segment 433 can abut against the second insert block 600, and after the arc-shaped concave segment 433 abuts against the second insert block 600, two second recessed notches 434 can be formed. The two second recessed notches 434 are respectively provided on one side of the first recessed notch 4320. The second recessed notches 434 are used to form the third protrusion 170 located on the inner wall of the mold body 110. The first recessed notch 4320 of the bent segment 432 and the second recessed notch 434 formed by the arc-shaped concave segment 433 and the second insert block 600 directly form the second protrusion 160 and the third protrusion 170 on the inner wall of the mold body 110 through "reverse forming".

[0042] Please continue reading. Figure 6 The second cavity 130 forming part includes a second forming part 251 disposed in the first cavity 210 and whose shape is adapted to and can abut against the first forming part 431, a third forming part 252 located on one side of the second forming part 251 and whose shape is adapted to and can abut against the bent section 432, and an arc protrusion 253. The end of the first cavity 210 with the smallest cross-sectional area has an arc protrusion 253, which can be adapted to the arc concave section 433. If a traditional mold needs to simultaneously form an irregular cavity 130 and an inner wall protrusion, it is necessary to set a cavity 130 forming core and a protrusion forming insert separately. This can easily lead to conflicts between the cavity 130 and the protrusion due to misalignment of multiple parts. This design integrates the cavity 130 forming structure (first cavity 130 forming part) and the protrusion forming structure (recessed notch) into the punch core 410. The two are formed simultaneously, ensuring that the second protrusion 160 and the third protrusion 170 are reasonably distributed around the cavity 130 (e.g., the first recessed notch 4320 is on the bending section 432, and the second recessed notch 434 is on the port side of the cavity 130).

[0043] Please see Figure 13 and Figure 14The recessed portion 412 extends from the front end of the punch core 410 to its rear end. The middle of the recessed portion 412 has a solid region 4120, the cross-section of which is a solid U-shaped structure with rounded corners at both ends. Warm wax fills the recessed portion 412 to form a plate 120, while the solid region 4120 forms a runner hole 121 on the plate 120. Traditional molds often require forming a U-shaped runner hole 121 on the plate 120 by first forming a wax model of the plate 120 and then milling the U-shaped groove using a special tool. This process is not only cumbersome and inefficient, but also prone to deformation of the plate 120 or roughening of the inner wall of the runner hole 121 due to improper milling force control. This design achieves "synchronous wax injection molding of plate 120 and flow channel hole 121" by combining the recessed part 412 with the solid U-shaped structure, completing the manufacturing of two structures in one go, greatly improving production efficiency. It eliminates the need for secondary machining, avoids the positional deviation and uneven diameter of flow channel hole 121 caused by machining errors, and ensures that the inner wall of flow channel hole 121 is smooth, thereby improving the fluid delivery efficiency of the pump body.

[0044] This wax injection mold features: 1. Simultaneous molding of complex cavities, avoiding defects from separate machining. Through the coordinated design of the main cavity (combined with the first mold body 200 and the second mold body 300), the recessed portion 412 of the punch core 410, the forming portion of the through cavity 130, and the side inserts, the mold body 110, U-shaped flow channel hole 121, through cavity 130, and support ear 140 with U-shaped hole 141 of the wax model 100 can be simultaneously molded in one piece, eliminating the need for separate molding followed by splicing or secondary machining. This avoids structural misalignment caused by traditional splicing (such as misalignment between the U-shaped flow channel hole 121 and the through cavity 130) and eliminates the problem of excessive surface roughness caused by manual finishing, ensuring the relative positional accuracy of each structure in the wax model 100. 2. Precise molding of inner / outer wall protrusions, giving the pump body practical functionality. By utilizing the "reverse forming" of the inner concave group of the first forming cavity 311, a first protrusion 150 can be formed on the outer wall of the mold body 110; through the first recessed notch 4320 of the bent section 432 of the punch core 410, the second recessed notch 434 that mates with the second insert 600, the second protrusion 160 and the third protrusion 170 on the inner wall of the mold body 110 are formed simultaneously. The protrusions are integrally formed with the wax mold 100, avoiding the positional offset and insufficient connection strength caused by traditional milling, which not only improves the assembly accuracy of the pump body, but also optimizes the water flow state in the flow channel, reduces turbulence loss, and improves the operating efficiency of the pump body. III. Bidirectional positioning structure prevents the mold core 400 from shifting. After the first insert 500 and the second insert 600 at both ends of the main cavity are precisely inserted through slots, they directly abut against both ends of the punch core 410, forming axial bidirectional positioning; the first core 421 of the mold core 400 is adapted to the second forming cavity 312 of the hollow cavity 310, providing radial support. Dual positioning can resist the movement or tilting of the mold core 400 caused by the impact of wax liquid during wax injection, ensure the stable position of the recessed part 412 (forming U-shaped flow channel hole 121) of the punch core 410, avoid uneven flow channel wall thickness, and ensure the structural consistency of each wax mold in mass production.

[0045] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A wax injection mold for a condensate pump, used to process and form a wax model with the same structure as the condensate pump, the wax model comprising a mold body, a U-shaped flow channel hole disposed inside the mold body, a through cavity distributed on one side of the flow channel hole and capable of penetrating the mold body outward, and two lugs respectively disposed on the outside of the mold body and each having a U-shaped hole, characterized in that: The system includes a first mold body having a first cavity, a second mold body having a hollow cavity and being fitted above the first mold body, and a mold core. The first cavity and the hollow cavity can be assembled to form a main cavity for molding the main body of the mold body. A first insert block and a second insert block are detachably connected to both ends of the main cavity. A first side insert block and a second side insert block are detachably connected to the front and rear sides of the main cavity, respectively. The first side insert block and the second side insert block can cooperate with the main cavity to form the support ear. The mold core has a punch core adapted to the main cavity. The two ends of the punch core abut against the first insert block and the second insert block, respectively. The punch core has an inwardly recessed portion for forming the flow channel hole. A first through cavity forming portion is provided on one side of the recessed portion. A second through cavity forming portion with a shape adapted to the first through cavity forming portion is provided at the corresponding position of the main cavity. When the mold core is inserted into the main cavity, the first through cavity forming portion and the second through cavity forming portion can cooperate with each other to form the through cavity.

2. The wax injection mold for a condenser water pump of claim 1, wherein: The first mold body is provided with a first slot that extends outward and is adjacent to one end of the first cavity, and the first slot can be inserted into the first insert block; the first mold body is provided with a second slot at one end away from the first slot that is adjacent to the other end of the first cavity, and the second slot extends outward and can be inserted into the second insert block.

3. The wax injection mold for a condensate pump according to claim 1, characterized in that: The upper surface of the first mold body is provided with two symmetrically arranged molding grooves, and the lower surface of the second mold body is also provided with two molding grooves. The molding grooves distributed on the second mold body correspond one-to-one with the two molding grooves located on the first mold body. When the first mold body and the second mold body are molded together, the two molding grooves in opposite positions can be combined to form a support ear molding groove for molding the support ear. The molding groove includes a first molding part that is recessed downward from the upper end of the first mold body or recessed upward from the lower end of the second mold body, an arc-shaped recessed part integrally formed on one end of the first molding part near the first cavity, and a second molding part that extends from one end through the first cavity to the first molding part through the arc-shaped recessed part to the first molding part.

4. The wax injection mold for a condenser water pump of claim 3, wherein: The first side insert and the second side insert have the same structure, and the first side insert and the second side insert are respectively inserted into the two support ear forming grooves; The first side insert includes an insert body located outside the first mold and the second mold, an insert segment fixed to one side of the insert body, an arc end fixed to the insert segment, and a U-shaped recessed groove extending from the upper end face of the insert segment around the arc end and extending to the lower end face of the insert segment. The insert segment is adapted to be connected to the first molding part, and the arc end is adapted to be connected to the arc recessed part.

5. The wax injection mold for a condensate pump according to claim 1, characterized in that: The hollow cavity includes a first molding cavity that is assembled with the first cavity to form the mold body and a second molding cavity integrally formed on the upper end of the first molding cavity. The inner wall of the first molding cavity is provided with two concave groups. After the mold is closed, the two concave groups are respectively distributed on both sides of the punch core and adjacent to the second insert block. Each concave group includes two spaced concave portions. Each concave portion is recessed outward from the inner wall of the first molding cavity. A plurality of concave portions can form a plurality of corresponding first protrusions on the outer wall of the mold body.

6. The wax injection mold for a condensate pump according to claim 5, characterized in that: The mold core also includes a core body, which includes a first core body integrally formed on the upper end of the punch core and adapted to the second molding cavity, and a second core body fixed to the upper end of the first core body. After the mold is closed, the second core body is exposed outside the hollow cavity.

7. The wax injection mold for a condensate pump according to claim 5, characterized in that: The second core has a recessed cavity that is recessed towards the punch core, and a holding rod is provided in the recessed cavity.

8. The wax injection mold for a condensate pump according to claim 5, characterized in that: The punch core has an inclined section. On the front projection surface of the punch core, the first through cavity forming part includes a forming part one protruding outward from the inclined section, a bent section with one end connected to the forming part one, and an arc concave section connected to the other end of the bent section. Both the front and rear ends of the bent section have a first recessed notch. The first recessed notch is used to form a second protrusion located on the inner wall of the mold body. The end face of the arc concave section can abut against the second insert block, and after the arc concave section abuts against the second insert block, two second recessed notches can be formed. The two second recessed notches are respectively provided on one side of the first recessed notch. The second recessed notches are used to form the third protrusion located on the inner wall of the mold body.

9. The wax injection mold for a condenser water pump of claim 8, wherein: The second cavity forming part includes a second forming part disposed in the first cavity and whose shape is adapted to and can abut against the first forming part, a third forming part located on one side of the second forming part and whose shape is adapted to and can abut against the bent section, and an arcuate protrusion. The end of the first cavity with the smallest cross-sectional area has an arcuate protrusion, and the arcuate protrusion can be adapted to the arcuate concave section.

10. The wax injection mold for a condenser water pump according to any one of claims 1-9, wherein: The recessed portion extends from the front end of the punch core to its rear end. The middle part of the recessed portion has a solid area. The cross-section of the solid area is a solid U-shaped structure, and both ends of the solid U-shaped structure are rounded.

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