Wax press with preheating function

Abstract

The utility model provides a wax injection machine with a preheating function, and belongs to the technical field of precision casting and manufacturing of dissolving molds. Comprising a wax injection machine body, a supporting platform, a pressing platform and a mold assembly are arranged on the wax injection machine body, the mold assembly is located in a working area and movably arranged on the supporting platform, the mold assembly is externally connected with a liquid injection pipe used for injecting wax liquid, and a protective shell is vertically arranged on the wax injection machine body in a sliding mode; a limiting piece used for limiting movement of the protective shell is arranged on the wax injection machine body, a heating assembly used for heating the mold assembly in the working area is arranged on the inner side wall of the protective shell, and the protective shell can slide on the outer side of the working area. The working area and the mold assembly are heated through the heating assembly, the inner wall of the cavity is kept at a certain temperature, when wax liquid is injected into the cavity, the wax liquid is not prone to being solidified on the inner wall of the cavity, and the effect of improving the blade wax mold forming quality is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of precision investment casting production technology, especially to a wax press with preheating function. BACKGROUND

[0002] The working blade is an important part of the aero-engine and gas turbine. The working blade is generally formed by investment casting. The investment precision casting is to make an accurate fusible model with fusible material, and then coat several layers of refractory coating on the model. After drying and hardening, the whole shell is formed. Then the model is heated to melt and flow, and then it is baked at high temperature to become a refractory shell. Finally, the liquid metal is poured into the shell, and the casting is formed after cooling. The melting point of wax is low, and it is the most commonly used fusible material in the investment precision casting process.

[0003] The patent with publication number CN102717027B discloses an automatic wax press, which comprises an electric cabinet, a reinforcing plate, a wax press cover plate, a support column, an upper workbench, a first magnetic chuck, an upper transition plate, an upper mold, a lower mold, a lower transition plate, a second magnetic chuck, a wax press base, a magnetic chuck mounting plate, an oil cylinder and a piston rod. The second magnetic chuck magnetically attracts the lower transition plate, and the lower transition plate is fixedly connected with the lower mold. The upper and lower molds are connected with a sprue rod on one side. The upper mold is fixedly connected with the upper transition plate, and the upper transition plate is magnetically attracted to the first magnetic chuck.

[0004] However, in low-temperature weather such as winter, the temperature of the mold is low, and the wax liquid is easy to quickly solidify on the inner wall of the mold after being poured into the mold, which causes the surface of the wax mold to have defects such as bubbles, affecting the quality of the subsequent formed blade. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a wax press with preheating function.

[0006] In order to achieve the above-mentioned purpose of the invention, the utility model adopts the following technical solutions:

[0007] A wax press with preheating function is provided, which comprises a wax press main body, a support platform, a lower pressing platform and a mold assembly arranged on the wax press main body. The lower pressing platform is located directly above the support platform. A first driving member is arranged on the wax press main body for vertically driving the lower pressing platform to rise and fall. A working area is formed between the support platform and the lower pressing platform. The mold assembly is located in the working area and movably arranged on the support platform. The mold assembly is externally connected with a liquid injection pipe for injecting wax liquid. A protective shell is vertically slidably arranged on the wax press main body. A limiting member is arranged on the wax press main body for limiting the movement of the protective shell. A heating assembly is arranged on the inner side wall of the protective shell for heating the mold assembly in the working area. The protective shell can slide to the outside of the working area.

[0008] Further, the first driving member comprises a first hydraulic cylinder, the first hydraulic cylinder is vertically fixedly arranged on the wax press main body, and a piston rod of the first hydraulic cylinder is fixedly connected with the lower pressing platform;

[0009] The mold assembly comprises an upper mold and a lower mold, the upper mold and the lower mold are detachably connected, a cavity for accommodating the blade wax mold is formed between the upper mold and the lower mold, and a sprue pipe, one end of which is connected with the liquid injection pipe and the other end of which communicates with the cavity, is arranged on the side wall of the upper mold and / or the lower mold.

[0010] Further, the wax press main body is vertically provided with a sliding rail, the protective shell is slidingly arranged on the sliding rail, the limiting member comprises a lead screw and a first motor, the lead screw is vertically and rotatably arranged on the wax press main body, the first motor is arranged on the wax press main body and is used for driving the lead screw to rotate, the protective shell is provided with a threaded sleeve matched with the lead screw, and the threaded sleeve is threadedly connected with the lead screw.

[0011] Further, the heating assembly comprises a mounting frame and an electric heating wire, one end of the mounting frame is hingedly arranged on the inner wall of the protective shell, the electric heating wire is arranged on one side of the mounting frame, facing the working area, and the protective shell is provided with a second driving member used for driving the mounting frame to rotate so that the electric heating wire is close to the working area.

[0012] Further, the mounting frame comprises a plurality of groups of connecting rods arranged on the inner wall of the protective shell and a mounting panel, one end of each connecting rod is hingedly connected with the inner wall of the protective shell, and the other end of the connecting rod is connected with the mounting panel, the electric heating wire is arranged on the mounting panel, the second driving member comprises a second motor, a first transmission rod and a plurality of second transmission rods, the first transmission rod is horizontally and rotatably arranged on the inner wall of the protective shell, the second motor is used for driving the first transmission rod to rotate, the second transmission rods are vertically and rotatably arranged on the inner wall of the protective shell, the bottom end of each second transmission rod is coaxially connected with the hinged shaft close to one end of the connecting rod, and the first transmission rod is in transmission connection with the second transmission rods through bevel gears.

[0013] Further, the mounting panel comprises a plurality of support panels which are slidingly connected in opposite vertical directions, each support panel is of a hollow structure, and the electric heating wire is arranged on each support panel, and the mounting panel further comprises a first elastic member used for driving two adjacent support panels to slide and elongate in opposite vertical directions.

[0014] The working area on the wax press main body is preheated by the heating assembly during the process of manufacturing the blade wax mold, the mold assembly is placed on the supporting platform of the wax press main body, the mold assembly is heated by the heating assembly, the wax liquid is injected into the mold assembly through the liquid injection pipe, the mold assembly can maintain a certain temperature in winter, the wax liquid is not easy to solidify on the inner wall of the cavity, the wax liquid is more easy to fill the entire cavity, and the quality of the formed blade wax mold is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the wax pressing machine of the embodiment of the present application.

[0016] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the protective shell of the wax pressing machine of the embodiment of the present application.

[0017] Figure 3 It is a schematic diagram of the structure of the heating assembly inside the protective shell of the embodiment of the present application.

[0018] Among them, 1, the main body of the wax pressing machine; 11, the support platform; 12, the lower pressing platform; 13, the mold assembly; 131, the liquid injection pipe; 14, the first hydraulic cylinder; 2, the protective shell; 21, the lead screw; 22, the first motor; 23, the threaded sleeve; 3, the heating assembly; 31, the mounting frame; 311, the connecting rod; 312, the mounting panel; 313, the first elastic member; 32, the heating wire; 33, the second motor; 34, the first transmission rod; 35, the second transmission rod. DETAILED DESCRIPTION

[0019] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings of the specification and the specific embodiments.

[0020] The embodiment of the present application discloses a wax pressing machine with preheating function, referring to Figure 1 and Figure 2 , comprising a wax pressing machine main body 1, the wax pressing machine main body 1 is provided with a support platform 11, a lower pressing platform 12 and a mold assembly 13, the lower pressing platform 12 is located above the support platform 11, a plurality of guide columns are vertically fixedly installed on the top wall of the lower pressing platform 12, the lower pressing platform 12 is vertically lifted and installed on the wax pressing machine main body 1 through the guide columns, a working area is formed between the support platform 11 and the lower pressing platform 12, the mold assembly 13 can be placed in the working area on the support platform 11, the wax pressing machine main body 1 is provided with a first driving member for driving the lower pressing platform 12 to vertically lift, the first driving member can be a first hydraulic cylinder, the first hydraulic cylinder is vertically fixedly installed on the wax pressing machine main body 1, and the piston rod of the first hydraulic cylinder 14 is fixedly connected with the lower pressing platform 12. The mold assembly 13 comprises an upper mold and a lower mold, a cavity is formed between the upper mold and the lower mold, a blade wax mold can be formed in the cavity by injecting wax liquid, a sprue pipe having one end connected with the liquid injection pipe 131 and the other end communicating with the cavity is arranged on the side wall of the upper mold and / or the lower mold, the upper mold and the lower mold can be simply connected and fixed by magnetic attraction connection, buckle connection or the like, and the liquid injection pipe 131 is used for injecting wax liquid into the cavity.

[0021] The protective shell 2 is vertically slidably installed on the wax pressing machine body 1, and can be slid to the same height as the working area and located outside the working area. The wax pressing machine body 1 is provided with a limiting piece for limiting the movement of the protective shell 2. The heating assembly 3 is arranged on the inner side wall of the protective shell 2. Before the wax pressing machine works, the protective shell 2 can be moved to the outside of the working area for fixation. The heating assembly 3 is turned on to heat the working area and the mold assembly 13 in the working area, so that the mold assembly 13 has a certain temperature. When the wax pressing starts, the wax liquid is injected into the cavity through the liquid injection pipe 131. The wax liquid is not easy to solidify on the inner wall of the cavity, so that the wax liquid can fully fill the cavity.

[0022] Specifically, a slide rail is vertically slidably installed on the wax pressing machine body 1, and the protective shell 2 is slidably connected to the slide rail. The limiting piece includes a lead screw 21 and a first motor 22. The lead screw 21 is vertically and rotatably installed on the wax pressing machine body 1. The first motor 22 is fixedly installed on the wax pressing machine body 1, and the output shaft of the first motor 22 is coaxially connected to one end of the lead screw 21 through a shaft coupling. The first motor 22 drives the lead screw 21 to rotate, thereby driving the protective shell 2 to vertically ascend and descend relative to the wax pressing machine body 1.

[0023] Referring to Figure 3 In the embodiment, the heating assembly 3 includes a mounting frame 31 and an electric heating wire 32. One end of the mounting frame 31 is hingedly connected to the inner wall of the protective shell 2. The electric heating wire 32 is arranged on the side of the movable end of the mounting frame 31 facing the working area. The protective shell 2 is provided with a second driving piece for driving the mounting frame 31 to rotate so that the electric heating wire 32 is close to the working area. Under the action of the first driving piece, the mounting frame 31 can be rotated to extend into the working area, so that the electric heating wire 32 can be closer to the mold assembly 13, thereby improving the heating effect of the mold assembly 13.

[0024] The mounting frame 31 can include a plurality of sets of connecting rods 311 and mounting panels 312 arranged on the inner wall of the protective shell 2, one end of the connecting rod 311 is hinged to the inner wall of the protective shell 2, the other end is connected to the mounting panel 312, and the electric heating wire 32 is mounted on the mounting panel 312. By at least two connecting rods 311, a parallelogram hinge is formed between the mounting panel 312 and the protective shell 2, so that the electric heating wire 32 can be kept in parallel with the inner wall of the protective shell 2 where it is located and moved in / out of the working area. In the embodiment of the present application, the heating assembly 3 is arranged on the continuous three inner side walls of the protective shell 2, the second driving member can be two motors, a first transmission rod 34 and a plurality of second transmission rods 35, the first transmission rod 34 is horizontally and rotatably mounted on the inner wall of the protective shell 2, the second motor 33 is mounted on the inner side wall of the protective shell 2 and its output shaft is drivingly connected with the first transmission rod 34 through gear transmission, toothed belt transmission or the like, the second transmission rod 35 is vertically and rotatably arranged on the inner wall of the protective shell 2, the bottom end of the second transmission rod 35 is coaxially fixedly connected with the hinge shaft close to one end of the connecting rod 311 of the protective shell 2, and the first transmission rod 34 is simultaneously connected with the plurality of second transmission rods 35 through bevel gears. Through one first transmission rod 34, three second transmission rods 35 can be simultaneously drivingly connected, so as to simultaneously drive the electric heating wires 32 on the three mounting panels 312 to approach / close to the mold assembly 13.

[0025] Further, the mounting panel 312 includes a plurality of relatively vertically slidingly connected supporting panels, each of which is a hollow structure, and each of which is provided with an electric heating wire 32. On the two relatively sliding supporting panels, one of the supporting panels is provided with a vertical guide rod, and the other supporting panel is slidingly mounted on the guide rod. The mounting panel 312 further includes a first elastic member 313, which is a spring. The spring is sleeved on the guide rod, one end of the spring is fixedly connected with the supporting panel, and the other end is in abutment with the other supporting panel and pushes the two supporting panels to slide and elongate.

[0026] Before the lower pressing platform 12 of the wax pressing machine main body 1 is lowered, the mounting panel 312 can be rotated into the working area to start preheating, and after the mold assembly 13 is placed in the working area, the lower pressing platform 12 is lowered to press the mounting panel, the adjacent supporting panels are contracted and overlapped, and the heating effect on the mold assembly 13 can still be maintained, the flowability of the wax liquid can be better maintained during the injection of the wax liquid into the mold assembly 13, and the filling effect of the wax liquid in the cavity can be improved.

[0027] Those skilled in the art will appreciate that although a preferred embodiment of the present application has been described, those skilled in the art will be able to devise alterations and modifications of the preferred embodiment without departing from the spirit and scope of the present application. Accordingly, it is intended that the appended claims be interpreted as including all such alterations and modifications as fall within the true spirit and scope of the present application. It is apparent that those skilled in the art can, without departing from the spirit and scope of the present application, make various changes and modifications of the present application. Thus, it is intended that the present application cover all such changes and modifications that fall within the scope of the present application, together with all such changes and modifications as are within the scope of the claims below and their equivalents.

Claims

1. A wax press having a preheating function, characterized by: The utility model provides a wax press machine, including the wax press machine body (1), be provided with support platform (11), lower press platform (12) and mould assembly (13) on the wax press machine body (1), lower press platform (12) is located the direct upper of support platform (11), be provided with first drive for driving lower press platform (12) vertical lift on the wax press machine body (1), the support platform (11) with lower press platform (12) between form work area, the mould assembly (13) is located in work area and is movably arranged on support platform (11), the mould assembly (13) circumscribes the liquid injection pipe (131) for injecting wax liquid, the protective shell (2) is vertically slidably arranged on the wax press machine body (1), be provided with for limiting the movement limiting piece of protective shell (2) on the wax press machine body (1), the inner side wall of protective shell (2) is provided with heating assembly (3) for heating the mould assembly (13) in work area, the protective shell (2) can slip the outside of work area.

2. The wax press with a preheating function according to claim 1, characterized in that, The first drive includes a first hydraulic cylinder (14) vertically fixedly arranged on the wax press machine body (1), and a piston rod of the first hydraulic cylinder (14) is fixedly connected with the lower press platform (12). The mould assembly (13) includes an upper die and a lower die, the upper die and the lower die are detachably connected, a cavity for accommodating a blade wax mold is formed between the upper die and the lower die, a sprue pipe having one end connected with the liquid injection pipe (131) and the other end communicated with the cavity is arranged on a side wall of the upper die and / or the lower die.

3. The wax press with a preheating function according to claim 1, characterized in that, The wax press machine body (1) is vertically provided with a sliding rail, the protective shell (2) is slidably arranged on the sliding rail, the limiting piece includes a lead screw (21) and a first motor (22), the lead screw (21) is vertically and rotatably arranged on the wax press machine body (1), the first motor (22) is arranged on the wax press machine body (1) and used for driving the lead screw (21) to rotate, a threaded sleeve (23) adapted to the lead screw (21) is arranged on the protective shell (2), and the threaded sleeve (23) is threadedly connected with the lead screw (21).

4. The wax press with a preheating function according to claim 1, characterized in that, The heating assembly (3) includes a mounting frame (31) and an electric heating wire (32), one end of the mounting frame (31) is hingedly arranged on the inner wall of the protective shell (2), the electric heating wire (32) is arranged on one side of the mounting frame (31) facing the work area, and a second drive for driving the mounting frame (31) to rotate so that the electric heating wire (32) approaches the work area is arranged on the protective shell (2).

5. The wax press with a preheating function according to claim 4, characterized in that, The mounting frame (31) comprises a plurality of sets of connecting rods (311) and mounting panels (312) arranged on the inner wall of the protective shell (2), one end of the connecting rod (311) is hinged to the inner wall of the protective shell (2), the other end is connected to the mounting panel (312), the electric heating wire (32) is arranged on the mounting panel (312), the second driving member comprises a second motor (33), a first transmission rod (34) and a plurality of second transmission rods (35), the first transmission rod (34) is horizontally and rotatably arranged on the inner wall of the protective shell (2), the second motor (33) is used for driving the first transmission rod (34) to rotate, the second transmission rod (35) is vertically and rotatably arranged on the inner wall of the protective shell (2), the bottom end of the second transmission rod (35) is coaxially connected with the hinged shaft of the connecting rod (311) close to one end of the protective shell (2), and the first transmission rod (34) is simultaneously connected with a plurality of second transmission rods (35) through bevel gear transmission.

6. The wax press with a preheating function according to claim 5, characterized in that, The mounting panel (312) comprises a plurality of supporting panels connected in vertical sliding mode, the supporting panel is a hollow structure, the electric heating wire (32) is arranged on each supporting panel, and the mounting panel (312) further comprises a first elastic member (313) for driving adjacent two supporting panels to vertically slide and elongate.

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