Wax mould for pump cover casting and casting system for pump cover casting

Abstract

The utility model discloses a wax mould for pump cover casting and a casting system for pump cover casting, which comprise a pump cover top flange plate mould and a pump cover main body mould, the pump cover top flange plate mould comprises a flange plate mould upper mould, a flange plate mould lower mould and a flange plate mould central sliding block, the pump cover main body mold comprises a pump cover main body mold upper mold and a pump cover main body mold lower mold, and side pressure flange plate modeling sliding blocks are arranged on one side of the pump cover main body mold upper mold and one side of the pump cover main body mold lower mold. According to the utility model, two sets of molds are used for modeling a complex thin-wall pump cover casting wax mold, so that the problems of complex structure and difficulty in modeling of the wax mold are solved; meanwhile, a plurality of groups of positioning sliding blocks are arranged, so that the wax mould is flexibly taken out, the accuracy of wax mould modeling is ensured, the integral molding of the wax mould with a complex casting becomes reality, the complexity of the mould is reduced, the manufacturing precision of the mould is improved, the surface quality of the wax mould is improved, and the repair amount of the wax mould is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of investment casting wax molds, in particular to a wax mold for a pump cover casting and a casting system for the pump cover casting. Background Art

[0002] Chemical pumps are specialized pumps used to transport various toxic, corrosive, flammable, and explosive chemicals. These industrial devices utilize the positive displacement principle, achieving suction and discharge through the volume changes of the pump body and pump chamber. When the pump body expands, the pressure within the pump chamber decreases, allowing liquid to enter the pump chamber through the inlet pipe. When the pump body contracts, the liquid within the pump chamber is squeezed out and discharged through the outlet pipe. Because chemical pumps primarily transport corrosive media, pump bodies with good corrosion resistance are often selected. Since many chemical processes require high temperatures, chemical pumps must also be able to withstand these temperatures.

[0003] Wax molds are a key component of the investment casting process. They are used to create wax patterns, which are then used to form sand mold shells and ultimately cast metal parts. Molds are typically constructed from carbon steel and high-grade aluminum alloys, materials that are easy to machine while providing the necessary durability to withstand repeated use. Molds are designed to allow molten wax to flow under extreme pressure, allowing it to solidify into a wax pattern. Double-sided molds, called templates, are commonly used in automated wax injection machines, which can produce thousands of molds per day. Molds can range from simple single-cavity tools to complex multi-cavity tools with automatic ejectors to accommodate varying batch sizes. Choosing the right molding method for creating complex cavities within wax patterns can improve production efficiency and reduce costs. The sealing, protection, and component retention functions of chemical pumps are crucial for their proper operation, making well-prepared pump covers essential.

[0004] Therefore, the current challenge is to design a new mold that can produce a complex pump cover wax mold that meets the requirements of complex external structure, good sealing performance, and good protection, while also solving the problems of low production efficiency and high production cost of wax mold cavity molding. At the same time, in order to cast castings with complex structures, accurate dimensional accuracy, and good performance, ensure the smooth introduction of molten metal into the mold cavity and control its flow direction and speed, improve casting quality, production efficiency, and reduce production costs, it is crucial to design a suitable casting system for investment casting. Utility Model Content

[0005] The utility model aims to provide a wax mold for a pump cover casting and a casting system for the pump cover casting, so as to solve the technical problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: a wax mold mold for pump cover castings, including a pump cover top flange mold and a pump cover main body mold, the pump cover top flange mold including a flange mold upper mold, a flange mold lower mold and a flange mold center slider, the pump cover main body mold including a pump cover main body mold upper mold and a pump cover main body mold lower mold, one side of the pump cover main body mold upper mold and the pump cover main body mold lower mold are both provided with a side pressure flange molding slider, a side pressure center slider is provided between the two side pressure flange molding sliders, a pump cover main body wax mold is provided in the middle part of the inner cavity of the pump cover main body mold upper mold and the pump cover main body mold lower mold, two symmetrically distributed side pressure base molding sliders are provided on one side of the pump cover main body wax mold, a bottom cylindrical fixed slider is provided at the bottom of the pump cover main body wax mold, and a bottom center core pulling slider is provided at the bottom of the bottom cylindrical fixed slider.

[0007] Preferably, the specification of the flange mold on the top of the pump cover is a round cake mold with a radius of 160 mm.

[0008] Preferably, the pump cover main body mold is a rectangular mold with a specification of 410×430×237 mm.

[0009] Preferably, the side-pressure flange-shaped sliding block consists of four parts, which are combined in pairs.

[0010] Preferably, the bottom cylindrical fixed slider is composed of two cylinders with different radii, and the bottom center core-pulling slider is a circular pipe structure.

[0011] Preferably, a pump cover groove molding slider is provided at the inner bottom of the pump cover main body wax mold, a bottom polygon molding slider is provided at the bottom of the pump cover groove molding slider, a runner molding slider is provided on one side of the pump cover main body wax mold, and a runner core pulling slider is provided at the end of the runner molding slider.

[0012] The utility model also relates to a casting system for a pump cover casting, comprising a pouring system runner, a pouring system sprue provided at the top of the pouring system runner, the pouring system sprue being connected to the pouring system runner via a runner support, and the pouring system runner being connected to a pouring system ingode. The utility model also relates to a casting system for a pump cover casting, comprising a pouring system runner, a pouring system sprue provided at the top of the pouring system runner, the pouring system sprue being connected to the pouring system runner via a runner support, and the pouring system runner being connected to a pouring system ingode.

[0013] Preferably, the pouring system is provided with three runners.

[0014] The wax mold for a pump cover casting and the casting system for the pump cover casting of the utility model have the following advantages:

[0015] 1. The utility model utilizes two sets of molds to shape the wax mold of complex thin-walled pump cover castings, solving the problem of complex wax mold structure and difficulty in shaping. At the same time, multiple sets of positioning sliders are provided to realize the flexible removal of the wax mold, ensure the accuracy of the wax mold shaping, and make the overall molding of the wax mold of complex castings a reality. At the same time, the complexity of the mold is reduced, the mold manufacturing accuracy is improved, the surface quality of the wax mold is improved, and the amount of wax mold repair is reduced.

[0016] 2. The casting system's runner design allows for a more stable flow of molten metal as it fills the mold cavity, preventing turbulence and splashing caused by impact. Due to the dispersed inner runners, the multi-runner casting system can mitigate local overheating of the casting, avoiding defects such as thermal cracks. At the same time, it ensures full solidification of the casting from bottom to top. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is the mold closing diagram of the flange mold of this utility model;

[0019] Figure 2 This is a schematic diagram of the core pulling of the flange mold of the utility model;

[0020] Figure 3 This is the mold closing diagram of the main body of the pump cover of the utility model;

[0021] Figure 4 This is a schematic diagram of the external core pulling of the pump cover main body mold of the utility model;

[0022] Figure 5 This is a schematic diagram of the core pulling inside the mold of the pump cover main body of the utility model;

[0023] Figure 6 This is a diagram of the casting system of the utility model.

[0024] Explanation of the marks in the figure: 1. Upper die of flange mold; 2. Center slider of flange mold; 3. Lower die of flange mold; 4. Upper die of pump cover main body mold; 5. Lower die of pump cover main body mold; 6-9. Side pressure flange molding slider; 10. Side pressure center slider; 11. Side pressure base molding slider; 12. Pump cover main body wax mold; 13. Bottom cylinder fixed slider; 14. Bottom center core-pulling slider; 15. Bottom polygonal molding slider; 16. Runner core-pulling slider; 17-21. Runner molding slider; 22-39. Pump cover groove molding slider; 40. Casting system straight runner; 41-43. Casting system horizontal runner; 44-45. Casting system inner runner; 46. Runner support. DETAILED DESCRIPTION

[0025] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0028] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0029] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0030] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a wax mold for a pump cover casting and a casting system for the pump cover casting of the present invention in conjunction with the accompanying drawings.

[0031] like Figure 1-5 As shown, the utility model is a wax mold mold for pump cover casting, including a pump cover top flange mold and a pump cover main body mold, the pump cover top flange mold including a flange mold upper mold 1, a flange mold lower mold 3 and a flange mold center slider 2, the pump cover main body mold including a pump cover main body mold upper mold 4 and a pump cover main body mold lower mold 5, the pump cover main body mold upper mold 4 and the pump cover main body mold lower mold 5 are both provided with side pressure flange shape sliders 6-9 on one side, a side pressure center slider 10 is provided between the two side pressure flange shape sliders 6-9, and a pump cover main body wax mold 12 is provided in the middle part of the inner cavity of the pump cover main body mold upper mold 4 and the pump cover main body mold lower mold 5. One side of the pump cover main body wax mold 12 is provided with two symmetrically distributed side pressure base molding sliders 11, the bottom of the pump cover main body wax mold 12 is provided with a bottom cylindrical fixed slider 13, and the bottom of the bottom cylindrical fixed slider 13 is provided with a bottom center core pulling slider 14. The side pressure center slider 10 is used to fix the upper and lower molds and shape the bottom support, the side pressure flange molding sliders 6-9 are used to shape the side end flange and connect the side pressure flange molding sliders 10, the bottom center core pulling slider 14 is used to shape the flow, the flange center mouth and connect the side pressure flange molding sliders 6-9, the bottom cylinder fixed slider 13 and the bottom center core pulling slider 14 mainly shape the center groove of the pump cover.

[0032] The specifications of the pump cover top flange mold are round cake molds with a radius of 160mm. The wax injection position of this mold is located on the side of the center slider 2 of the flange mold, and the center slider on the surrounding side is cylindrical. The exhaust is discharged through the mold parting surface during the wax injection process. The specifications of the pump cover main body mold are rectangular molds with a size of 410×430×237mm. The wax injection position of this mold is located on the side of the center slider. The exhaust is discharged through the mold parting surface during the wax injection process. This mold mainly coordinates the molding sliders to jointly mold the runner and bottom support of the pump cover. The side pressure flange molding sliders 6-9 are composed of four parts, which are combined in pairs. They are the same as the parting surface used to mold the pump cover main body mold. They can mold the side end flange and the support and runner connecting the pump cover and the flange. The bottom cylindrical fixed slider is composed of two cylinders of different radii, which are used to fix and mold the pump cover groove. The bottom center core-pulling slider 14 is a circular pipe structure, which cooperates with the runner molding slider and the center slider to mold the pump cover pump groove and remove the runner molding slider. A pump cover groove shaping slider 22-39 is provided at the inner bottom of the pump cover main body wax mold 12, a bottom polygon shaping slider 15 is provided at the bottom of the pump cover groove shaping slider 22-39, a flow channel shaping slider 17-21 is provided on one side of the pump cover main body wax mold 12, and a flow channel core pulling slider 16 is provided at the end of the flow channel shaping slider 17-21.

[0033] like Figure 6 As shown, the utility model also relates to a casting system for pump cover castings, including a casting system runner 41-43, the top of the casting system runner 41-43 is provided with a casting system straight runner 40, the casting system straight runner 40 is connected to the casting system runner 41-43 through a runner support 46, the casting system runner 41-43 is connected to the casting system inner runner 44-45, the straight runner of the casting system is in the shape of an inverted boss, the straight runner has the function of a pouring cup and a riser, so the top is larger, which can play the role of casting molten metal and cooling the shrinkage-compensating casting.

[0034] There are three cross runners 41-43 of the casting system, among which the casting position is set at the pump cover flange and there is a cross runner and an ingrow respectively. The cross runner is perpendicular to the straight runner of the casting system, and the two cross runners are also perpendicular to each other. The ingrown runner is perpendicular to each cross runner and parallel to the straight runner; and the casting position is set at the bottom support of the pump cover, which has two cross runners and two ingrowns. The cross runner connected to the straight runner is perpendicular to the straight runner of the casting system, and the other cross runner not connected to the straight runner is parallel to the straight runner of the casting system and perpendicular to the cross runner connected to the straight runner, and is also perpendicular to the two ingrowns. The two ingrowns are parallel to the cross runner connected to the straight runner, and are respectively located on the pump cover groove support.

[0035] The first part of the mold of this utility model is used to shape the flange structure at the top of the pump cover, and the second part is used to shape the main structure of the pump cover. The first part of the mold is formed by two smaller round cake-shaped molds, which are fixed by a central columnar slider. The second part of the mold is mainly divided into two upper and lower rectangular molds, which are fixed by sliders around the periphery and the bottom slider to prevent the upper and lower molds from shifting. The bottom slider and the mold together play the role of shaping the wax mold, and the runner slider shapes the internal runner of the pump cover. The casting system consists of three groups of runners, namely two groups of runners with casting positions set at the pump cover flange and one group of runners with casting positions set at the bottom support of the pump cover.

[0036] The mold used to shape the flange on the top of the pump cover is in the shape of two circular cakes with a radius of 160mm and is connected by a cylindrical center slider. The castable circular hole on the flange is shaped by the upper mold, and the molded wax mold is heated on one side by a hot soldering iron and bonded to the wax mold of the pump cover body; the upper and lower molds used to shape the flange on the top of the pump cover have 8 holes evenly arranged on the surface of the upper mold, which are used to shape the flange hole. At the same time, there is a circular hole in the upper mold for the center slider to be removed, and the circular hole can also be used as a wax injection position for the mold to make the wax mold; the mold used to shape the main structure of the pump cover, as well as the sliders fixed around the mold and the core-pulling slider fixed at the bottom.

[0037] The mold for molding the main structure of the pump cover consists of a rectangular mold with a mold specification of 410×430×237mm. The wax injection position of the mold is located on the side of the surrounding center slider. The air is exhausted through the mold parting surface during the wax injection process. The mold mainly coordinates the molding sliders to jointly mold the flow channel and bottom support of the pump cover; there are sliders fixed around the mold and core-pulling sliders fixed at the bottom. There are 2 center core-pulling sliders, which are respectively set at the bottom of the mold and one side of the mold parting surface; 2 side-pressure core-pulling sliders are used to mold the bottom bracket of the pump cover, 4 side-pressure core-pulling sliders are used to mold the side flange of the pump cover, and 1 hollow tubular slider is used to mold the cover groove of the pump cover; the center slider at the bottom of the mold is composed of two cylinders. The bottom cylinder has a larger bottom area, a radius of 74mm, a lower height and a pancake shape, which is easy to pick up and convenient for core pulling; the top cylinder has a smaller bottom area and a higher height and is columnar, which is used to mold the hollow flange connected to the pump cover flow channel. The center slider on one side of the mold parting surface is composed of two cylinders. The bottom cylinder has a larger bottom area, a radius of 45.5mm, and a lower height in a pancake shape, making it easy to pick up and facilitate core pulling. The top cylinder has a smaller bottom area and a higher height in a column shape, which is used to shape the hollow flange and is connected to the pump cover runner. The bracket side pressure core pulling slider is composed of three rectangular blocks and is used to shape the bottom bracket of the pump cover and fix the upper and lower molds of the pump cover body. The side pressure core pulling slider used to shape the side flange of the pump cover is assembled with the upper and lower molds of the pump cover body and the center slider on the side of the mold parting surface. The slider has the function of assembling and fixing the upper and lower molds. Since the interior of the four sliders is a hollow structure, the side flange is shaped. The hollow tubular slider is used to shape the pump cover groove. This mechanism is assembled with the pump cover runner molding slider and the bottom center molding slider to shape the pump cover wax mold groove.

[0038] There are 24 built-in flow channel sliders used for shaping the flow channel of the pump cover, including 18 pump cover groove shaping sliders, and 3 of the shaping sliders form a group for shaping the interior of the pump cover groove; 1 tubular slider for fixing the pump cover groove shaping sliders, and the slider is assembled with the hollow tubular slider at the same time; including 5 flow channel shaping sliders, the sliders are U-shaped and assembled with each other, and combined with the mortise and tenon of the pump cover groove shaping sliders to achieve the shaping of the interior of the pump cover.

[0039] The casting system consists of a sprue and three groups of runners, two of which are set at the pump cover flange and one group of runners set at the pump cover bottom support. The sprue of the casting system is in the shape of an inverted boss. It has the functions of a pouring cup and a riser, so the top is larger, which can play the role of pouring molten metal and cooling the shrinkage-feeding casting. The sprue is fixed by three oblique rectangular supports, which are connected to three cross runners respectively. The three groups of runners of the casting system, two of which have the same structure and are set at a section of the pump cover flange, and one group of runners is set at the pump cover bottom support. The casting position is set There is a horizontal runner and an ingrowth at the pump cover flange. The horizontal runner is perpendicular to the straight runner of the casting system, and the two horizontal runners are also perpendicular to each other. The ingrowth is perpendicular to each horizontal runner and parallel to the straight runner; the casting position is set at the bottom support of the pump cover, and it has two horizontal runners and two ingrowths. The horizontal runner connected to the straight runner is perpendicular to the straight runner of the casting system, and the other horizontal runner not connected to the straight runner is parallel to the straight runner of the casting system and perpendicular to the horizontal runner connected to the straight runner, and is also perpendicular to the two ingrowths. The two ingrowths are parallel to the horizontal runner connected to the straight runner, and are respectively located on the pump cover groove support.

[0040] The use method of this utility model:

[0041] When the flange mold is assembled before wax injection, the utility model first installs the flange mold upper mold 1 and the flange mold lower mold 3 in the mortise and tenon position, then injects low-temperature wax through the center circular hole, and finally fixes the flange mold center slider 2; after waiting for a certain period of time, the flange mold center slider 2 is pulled out, the flange mold upper mold 1 is removed, and the flange wax mold is taken out.

[0042] When the pump cover main body mold is assembled before wax injection, the utility model first assembles the pump cover main body mold lower mold 5 with the bottom center core-pulling slider 14 and the bottom cylindrical fixed slider 13, and then assembles the pump cover groove shaping sliders 22-39 with the bottom polygonal shaping slider 15, so that the assembled slider combination and the bottom cylindrical fixed slider 13 are assembled into a whole, and then the flow channel shaping sliders 17-21 are connected with the pump cover groove shaping sliders 22-39 to realize the combination of the molds. After the interior of the mold is set up, the pump cover main body mold upper mold 4 is placed on the pump cover main body mold lower mold 5, and finally the side pressure sliders are connected to the upper and lower molds; after the assembly is completed, as the pump cover main body wax mold 12 cools, the sliders are taken out one by one, and the shaping of the pump cover main body wax mold 12 is completed.

[0043] Based on the above pouring system, top pouring method is adopted for pouring:

[0044] The sprue directs the molten metal to the runner and ingates. The molten metal fills the casting from the bottom curved surface of the cavity. The ingates then feed the flange and bottom of the casting from the cavity, reducing shrinkage and shrinkage cavities. The molten metal cools sequentially, solidifying from bottom to top, with the sprue solidifying last. This sprue acts as a feeder for the riser. The vertical casting system runners 41-43 control molten metal splashing and reduce inclusions.

[0045] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A wax mold for a pump cover casting, characterized in that: The invention comprises a pump cover top flange mold and a pump cover main body mold, wherein the pump cover top flange mold comprises a flange mold upper mold (1), a flange mold lower mold (3) and a flange mold center slider (2), and the pump cover main body mold comprises a pump cover main body mold upper mold (4) and a pump cover main body mold lower mold (5). A side pressure flange molding slider (6-9) is arranged on one side of the pump cover main body mold upper mold (4) and the pump cover main body mold lower mold (5), and a side pressure center slider (10) is arranged between the two side pressure flange molding sliders (6-9). A pump cover main body wax mold (12) is arranged in the middle part of the inner cavity of the pump cover main body mold upper mold (4) and the pump cover main body mold lower mold (5), and two symmetrically distributed side pressure base molding sliders (11) are arranged on one side of the pump cover main body wax mold (12). A bottom cylindrical fixed slider (13) is arranged at the bottom of the pump cover main body wax mold (12), and a bottom center core-pulling slider (14) is arranged at the bottom of the bottom cylindrical fixed slider (13).

2. A wax mold for a pump cover casting according to claim 1, characterized in that: The specification of the pump cover top flange mold is a round cake mold with a radius of 160 mm.

3. A wax mold for a pump cover casting according to claim 1, characterized in that: The pump cover main body mold specification is a rectangular mold of 410×430×237 mm.

4. A wax mold for a pump cover casting according to claim 1, characterized in that: The side-pressure flange shape sliding block (6-9) consists of four parts, which are combined in pairs.

5. A wax mold for a pump cover casting according to claim 1, characterized in that: The bottom cylindrical fixed slider is composed of two cylinders with different radii, and the bottom center core-pulling slider (14) is a circular pipe structure.

6. A wax mold for a pump cover casting according to claim 1, characterized in that: A pump cover groove molding slider (22-39) is arranged at the inner bottom of the pump cover main body wax mold (12), a bottom polygon molding slider (15) is arranged at the bottom of the pump cover groove molding slider (22-39), a flow channel molding slider (17-21) is arranged on one side of the pump cover main body wax mold (12), and a flow channel core pulling slider (16) is arranged at the end of the flow channel molding slider (17-21).

7. A casting system for a pump cover casting, characterized in that: The invention comprises a pouring system runner (41-43), the top of which is provided with a pouring system sprue (40), the pouring system sprue (40) is connected to the pouring system runner (41-43) via a sprue support (46), and the pouring system runner (41-43) is connected to a pouring system endogate (44-45).

8. A casting system for a pump cover casting according to claim 7, characterized in that: The pouring system is provided with three runners (41-43).

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