Steam dewaxing apparatus and dewaxing method

Abstract

This invention relates to a steam dewaxing device and method, comprising: a steam generator; and a dewaxing mechanism, wherein the dewaxing mechanism includes a dewaxing chamber and a second heat-insulating shell disposed outside the dewaxing chamber. The bottom of the inner wall of the dewaxing chamber is provided with a rectangular frame having a cavity. The steam generator is connected to the cavity of the rectangular frame via a connecting pipe. In this invention, when no object is placed in the placement platform, the steam pressure in the cavity of the rectangular frame controls the opening of the pressure component, allowing steam to enter the gap between the second heat-insulating shell and the dewaxing chamber. Heat is conducted to the inside of the dewaxing chamber, increasing the internal temperature and allowing the dewaxing chamber to heat up rapidly in a short time, thus accelerating the dewaxing speed of the object.

Description

Technical Field

[0001] This invention relates to the field of dewaxing equipment technology, and more particularly to steam dewaxing equipment and dewaxing methods. Background Technology

[0002] The basic process of investment casting can be divided into wax pattern casting, shell manufacturing, and baking and pouring. Since the shell plays a key role in the quality of the casting, the manufacturing of the shell itself is very important. Common shell processing techniques include: degreasing and greasing the wax pattern, applying paint and sprinkling sand on the wax pattern, drying and hardening the shell, melting the wax pattern, and baking the shell.

[0003] Since the materials used to make wax molds usually have low melting points, the melting of wax molds for small quantities and ordinary shells can be achieved by immersing them in boiling water. However, for large shells or mass production, a special dewaxing device is usually required to complete the process.

[0004] In existing technologies, although the temperature inside the dewaxing chamber rises evenly, the temperature rise time is relatively long, which increases the dewaxing time of the object and thus reduces the dewaxing efficiency. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a steam dewaxing device and method, the specific technical solution of which is as follows:

[0006] A steam dewaxing apparatus, comprising:

[0007] Steam generator;

[0008] The dewaxing mechanism includes a dewaxing chamber and a second heat-insulating shell disposed outside the dewaxing chamber. The bottom of the inner wall of the dewaxing chamber is provided with a rectangular frame with a cavity. The steam generator is connected to the cavity of the rectangular frame through a connecting pipe. Multiple pressure members are provided between the rectangular frame and the dewaxing chamber. When the steam pressure inside the rectangular frame is greater than the elastic force of the pressure members, the pressure members are opened, and the steam inside the rectangular frame enters the gap between the second heat-insulating shell and the dewaxing chamber through the pressure members to form a heating layer.

[0009] A placement platform is provided above the rectangular frame. Multiple sets of air vents are provided on the surface of the placement platform. Multiple sets of elastic adjustment components are provided at the bottom of the placement platform. An opening is provided at the top of the elastic adjustment component. A sealing component adapted to the opening is provided inside the elastic adjustment component. The placement platform is driven downward by the gravity of the object to be dewaxed, controlling the opening to open and the pressure component to close. Steam enters into the placement platform and flows into the dewaxing chamber through the air vents to heat and dewax the object to be dewaxed inside the dewaxing chamber.

[0010] As an improvement to the above technical solution, the elastic adjustment component includes a fixing tube disposed at the bottom of the placement platform. The top of the fixing tube is provided with an opening that connects the fixing tube to the interior of the placement platform. The bottom of the fixing tube penetrates the top of the rectangular frame and extends into the cavity of the rectangular frame. Multiple sets of air inlets are provided on the side wall of the fixing tube and in the cavity of the rectangular frame. A spring is provided on the surface of the fixing tube and between the placement platform and the rectangular frame. A sealing component is provided inside the fixing tube.

[0011] As an improvement to the above technical solution, the sealing element includes a fixing rod disposed at the bottom of the inner wall of the rectangular frame. The top of the fixing rod passes through the fixing tube and extends to the outside of the fixing tube. A sealing plate is provided at the end of the fixing rod extending to the outside of the fixing tube to seal the opening at the top of the fixing tube.

[0012] As an improvement to the above technical solution, the pressure component includes a fixed frame disposed between the rectangular frame and the bottom of the dewaxing box, a sealing ball movably disposed on the top of the fixed frame, and a cross-shaped part disposed at the bottom of the fixed frame. A spring is disposed between the bottom of the sealing ball and the top of the cross-shaped part.

[0013] As an improvement to the above technical solution, the top of the fixing frame is provided with a through hole that is adapted to the sealing ball, and the maximum diameter of the through hole is smaller than the diameter of the sealing ball.

[0014] As an improvement to the above technical solution, the steam generator is provided with a heat insulation shell 1, which is connected to a heat insulation shell 2. A steam outlet pipe is provided on the top of the side of the heat insulation shell 1 away from the heat insulation shell 2, and the other end of the steam outlet pipe is connected to a steam recovery device.

[0015] As an improvement to the above technical solution, the placement platform further includes a placement frame and three sets of enclosures connected to the top of the placement frame. The air vent is opened on the top of the placement frame and the side wall of the enclosure. The end of the top of the placement frame without enclosure corresponds to the door of the dewaxing box. A boss is connected to the bottom of the placement frame, and a wax discharge pipe is connected to the bottom of the boss.

[0016] The steam dewaxing method, using the steam dewaxing apparatus described above, includes the following steps:

[0017] S1: Filtered water first enters the steam generator through a pipe, where it is heated to produce steam. The steam then enters the cavity of the rectangular frame through a connecting pipe.

[0018] S2: When the steam pressure in the rectangular frame cavity is greater than the pressure of the pressure component, the pressure component opens, and steam enters the gap between the insulation shell and the dewaxing box to form a heating layer for preheating the dewaxing box.

[0019] S3: Place the object to be dewaxed on the placement platform. The placement platform moves downward under gravity and controls the opening to open. As the steam pressure inside the rectangular frame decreases, the pressure component closes, and steam enters the placement platform and flows into the dewaxing box through the vent to heat and dewax the object to be dewaxed inside the dewaxing box.

[0020] The beneficial effects of this invention are:

[0021] When no object is placed in the placement platform, the steam pressure control device in the rectangular frame cavity opens, allowing steam to enter the gap between the insulation shell and the dewaxing chamber. Heat is conducted to the inside of the dewaxing chamber, increasing the internal temperature and allowing the dewaxing chamber to heat up rapidly in a short time, thus accelerating the dewaxing speed of the object.

[0022] The elastic adjustment and sealing components allow the opening to be opened when there is an object to be dewaxed on the placement platform. As the steam pressure inside the rectangular frame decreases, the pressure component closes, and steam enters the placement platform. It then flows into the dewaxing chamber through the vent, heating and dewaxing the object inside the chamber. Simultaneously, the steam entering the gap between the insulation shell and the dewaxing chamber forms a heat insulation layer, further improving the dewaxing speed. Attached Figure Description

[0023] Figure 1 This is a front view of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point B

[0026] Figure 4 This is a schematic diagram of the fixed tube in the open state in this invention;

[0027] Figure 5 This is a schematic diagram of the rectangular frame structure in this invention;

[0028] Figure 6 This is a schematic diagram of the placement platform in this invention.

[0029] Reference numerals: 10. Steam generator; 11. Insulation shell one; 12. Connecting pipe; 20. Dewaxing box; 21. Insulation shell two; 22. Placement platform; 221. Fixing pipe; 222. Air inlet; 223. Spring one; 224. Enclosure; 225. Air outlet; 226. Boss; 23. Rectangular frame; 231. Fixing rod; 232. Sealing plate; 30. Fixing frame; 31. Sealing ball; 32. Spring two; 33. Cross; 34. Through hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example

[0031] A steam dewaxing device includes: a steam generator 10; and a dewaxing mechanism, which includes a dewaxing chamber 20 and a second heat-insulating shell 21 disposed outside the dewaxing chamber 20. The bottom of the inner wall of the dewaxing chamber 20 is provided with a rectangular frame 23 having a cavity. The steam generator 10 is connected to the cavity of the rectangular frame 23 through a connecting pipe 12. Multiple pressure members are provided between the rectangular frame 23 and the dewaxing chamber 20. When the steam pressure inside the rectangular frame 23 is greater than the elastic force of the pressure members, the pressure members are opened, and the steam inside the rectangular frame 23 enters the gap between the second heat-insulating shell 21 and the dewaxing chamber 20 through the pressure members to form a heating layer.

[0032] A placement platform 22 is provided above the rectangular frame 23. Multiple sets of air vents 225 are provided on the surface of the placement platform 22. Multiple sets of elastic adjustment members are provided at the bottom of the placement platform 22. An opening is provided at the top of the elastic adjustment member. A sealing member adapted to the opening is provided inside the elastic adjustment member. The placement platform 22 is driven downward by the gravity of the object to be dewaxed, controlling the opening to open and the pressure member to close. Steam enters the placement platform 22 and flows into the dewaxing box 20 through the air vents 225 to heat and dewax the object to be dewaxed in the dewaxing box 20.

[0033] When dewaxing an object, filtered water is first piped into the steam generator 10. The steam generator 10 heats the water to produce steam. The steam then enters the cavity of the rectangular frame 23 through the connecting pipe 12. When the steam pressure inside the cavity of the rectangular frame 23 exceeds the pressure of the pressure component, the pressure component opens, and the steam enters the gap between the insulation shell 21 and the dewaxing chamber 20. Heat is conducted into the dewaxing chamber 20, increasing the internal temperature and allowing the dewaxing chamber 20 to heat up rapidly in a short time, thus accelerating the dewaxing process. The object to be dewaxed is placed on the placement platform 22, which moves downward under gravity and opens the control opening. As the steam pressure inside the rectangular frame decreases, the pressure component closes, and steam enters the placement platform 22 and flows into the dewaxing box 20 through the vent 225. This heats and dewaxes the object inside the dewaxing box 20. At the same time, the steam entering the gap between the insulation shell 21 and the dewaxing box 20 can form a heat insulation layer, further improving the dewaxing speed. A recovery pipe is provided on one side of the dewaxing box 20 to recover and separate the steam and wax fumes inside the dewaxing box 20.

[0034] In one embodiment, the elastic adjustment member includes a fixing tube 221 fixedly disposed at the bottom of the placement platform 22. The top of the fixing tube 221 has an opening communicating with the interior of the placement platform 22. The bottom of the fixing tube 221 penetrates the top of the rectangular frame 23 and extends into the cavity of the rectangular frame 23. Multiple sets of air inlets 222 are disposed on the sidewall of the fixing tube 221 within the cavity of the rectangular frame 23. A spring 223 is disposed on the surface of the fixing tube 221 between the placement platform 22 and the rectangular frame 23. A sealing member is disposed inside the fixing tube 221. The sealing member includes a fixing rod 231 fixedly disposed at the bottom of the inner wall of the rectangular frame 23. The top of the fixing rod 231 penetrates the fixing tube 221 and extends to the outside of the fixing tube 221. A sealing plate 232 is fixedly disposed at one end of the fixing rod 231 extending to the outside of the fixing tube 221 to seal the top opening of the fixing tube 221. Specifically, in the initial state, i.e., when no object is placed on the placement platform 22, refer to... Figure 1 and Figure 3 When the steam inside the rectangular frame 23 enters the fixed pipe 221 only through the air inlet 222, the opening at the top of the fixed pipe 221 is sealed by the sealing plate 232, thus preventing it from entering the placement platform 22. As the steam pressure inside the rectangular frame 23 increases, when the steam pressure inside the rectangular frame 23 exceeds the pressure of the pressure element, the pressure element opens, allowing the steam inside the rectangular frame 23 to enter the gap between the inner wall of the insulation shell 21 and the outer wall of the dewaxing chamber 20. Under the heat conduction effect, the dewaxing chamber 20 can be preheated evenly without wasting steam. When the placement platform 22 moves downwards due to the weight of the object, refer to... Figure 4 The placement platform 22 moves the fixed tube 221 downward, causing the sealing plate 232 to disengage from the opening of the fixed tube 221, thus opening the opening. This allows the steam in the rectangular frame 23 to enter the fixed tube 221 through the air inlet 222, and then flow into the dewaxing box 20 through the opening at the top of the fixed tube 221. After the object is dewaxed, it is removed from the placement platform 22. Under the restoring force of the spring 223, the spring 223 pushes the placement platform 22 upward, sealing the opening to prevent steam from continuing to flow out and causing waste. The fixed tube 221 is movably connected to the rectangular frame 23.

[0035] In one embodiment, reference Figure 1 and Figure 2The pressure component includes a fixed frame 30 disposed between the bottom of the rectangular frame 23 and the dewaxing chamber 20, a sealing ball 31 movably disposed on the top of the fixed frame 30, and a cross 33 disposed at the bottom of the fixed frame 30. A second spring 32 is disposed between the bottom of the sealing ball 31 and the top of the cross 33. The top of the fixed frame 30 has a through hole 34 adapted to the sealing ball 31. The maximum diameter of the through hole 34 is smaller than the diameter of the sealing ball 31. Specifically, when the steam pressure inside the rectangular frame 23 is greater than the elastic force of the second spring 32, the steam pushes the sealing ball 31 downward, causing the through hole 34 to open, and the steam enters through the through hole 34. The steam flows into the fixed frame 30, and then is guided by the fixed frame 30 to the gap formed between the inner wall of the insulation shell 21 and the outer wall of the dewaxing box 20. When the steam in the rectangular frame 23 enters the placement platform 22, the steam pressure in the rectangular frame 23 decreases. When it is less than the elastic force of the second spring 32, under the action of the restoring elastic force of the second spring 32, the second spring pushes the sealing ball 31 to move upward, sealing the through hole 34, so that the steam can completely enter the placement platform 22, so as to accelerate the dewaxing speed. The maximum diameter of the through hole 34 is smaller than the diameter of the sealing ball 31, in order to avoid the sealing ball 31 completely passing through the through hole 34 and exiting the fixed frame 30, which would cause the problem of not being able to seal.

[0036] In one embodiment, the steam generator 10 is provided with a heat insulation shell 11, which is connected to a second heat insulation shell 21. A steam outlet pipe is provided on the top of the side of the heat insulation shell 11 away from the second heat insulation shell 21, and the other end of the steam outlet pipe is connected to a steam recovery device. Specifically, in order to reduce the heat loss of the steam generator 10 during use, the heat inside the second heat insulation shell 21 can enter the first heat insulation shell 11 to provide heat insulation for the steam generator 10. At the same time, the steam flowing out from the steam outlet pipe can be directly recovered and reused without secondary treatment.

[0037] In one embodiment, reference Figure 1 , Figure 4 as well as Figure 6The placement platform 22 also includes a placement frame and three sets of enclosures 224 connected to the top of the placement frame. Vent holes 225 are located on the top of the placement frame and the side walls of the enclosures 224. The end of the placement frame without enclosures 224 corresponds to the door of the dewaxing box 20. A protrusion 226 is connected to the bottom of the placement frame, and a wax discharge pipe is connected to the bottom of the protrusion 226. Specifically, the vent holes 225 on the placement frame not only allow steam inside the placement platform 22 to flow out, but also allow liquid wax to flow into the placement platform 22 for recycling and storage. To prevent the vent holes 225 at the bottom of the placement frame from being blocked by objects, thus preventing steam from flowing out quickly, enclosures are provided on three sides of the top of the placement frame. The baffle 224 allows steam to smoothly enter the dewaxing chamber 20, thus ensuring more thorough heating and increasing the dewaxing speed. For ease of object placement, the side near the chamber door of the dewaxing chamber 20 is not equipped with a baffle. When the placement platform 22 moves downwards, the protrusion 226 can contact the bottom of the inner wall of the dewaxing chamber 20, providing support and effectively preventing the spring 223 from failing to support it and causing damage, thus extending its service life. The wax discharge pipe can drain and recycle the wax inside the placement platform 22. Steam entering the placement platform 22 can also heat it, preventing the wax from solidifying inside and causing blockage. Example

[0038] The steam dewaxing method, using the steam dewaxing apparatus described in Example 1, includes the following steps:

[0039] S1: The filtered water first enters the steam generator 10 through a pipe, where it is heated to produce steam. The steam then enters the cavity of the rectangular frame through the connecting pipe 12.

[0040] S2: When the steam pressure in the cavity of the rectangular frame 23 is greater than the pressure of the pressure component, the pressure component opens, and steam enters the gap between the heat insulation shell 21 and the dewaxing box 20 to form a heating layer for preheating the dewaxing box 20.

[0041] S3: Place the object to be dewaxed on the placement platform 22. The placement platform 22 moves downward under gravity and controls the opening to open. As the steam pressure inside the rectangular frame 23 decreases, the pressure member closes, and steam enters the placement platform 22 and flows into the dewaxing box 20 through the vent 225 to heat and dewax the object to be dewaxed inside the dewaxing box 20.

[0042] When no object is placed in the placement platform 22, the steam pressure control device in the cavity of the rectangular frame 23 opens, and steam enters the gap between the insulation shell 21 and the dewaxing box 20. The heat is conducted to the inside of the dewaxing box 20, which increases the internal temperature of the dewaxing box 20 and allows the dewaxing box 20 to heat up rapidly in a short time, which can speed up the dewaxing of the object.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steam dewatering apparatus, characterized by, Include: Steam generator (10); Dewaxing mechanism, the dewaxing mechanism includes dewaxing box (20) and heat preservation shell two (21) arranged outside the dewaxing box (20), the inner wall bottom of the dewaxing box (20) is provided with a rectangular frame (23) with containing cavity, the steam generator (10) is communicated with the cavity of rectangular frame (23) by connecting pipe (12), a plurality of pressure elements are arranged between the rectangular frame (23) and the dewaxing box (20), when the steam pressure in the rectangular frame (23) is greater than the elastic force of the pressure element, the pressure element is controlled to open, the steam in the rectangular frame (23) enters the gap between the heat preservation shell two (21) and the dewaxing box (20) through the pressure element, and a heating layer is formed; The top of the rectangular frame (23) is provided with a placing table (22), a plurality of air outlets (225) are formed in the surface of the placing table (22), a plurality of elastic adjusting elements are arranged at the bottom of the placing table (22), an opening part is formed in the top of the elastic adjusting element, a sealing element matched with the opening part is arranged in the elastic adjusting element, the placing table (22) is driven downward by the gravity of the object to be dewaxed, the opening part is controlled to open and the pressure element is controlled to close, the steam enters the placing table (22), flows into the dewaxing box (20) through the air outlet (225), and the object to be dewaxed in the dewaxing box (20) is heated and dewaxed; The elastic adjusting element includes a fixed tube (221) arranged at the bottom of the placing table (22), an opening part is formed in the top of the fixed tube (221) and communicates the fixed tube (221) with the inside of the placing table (22), the bottom of the fixed tube (221) penetrates the top of the rectangular frame (23) and extends into the cavity of the rectangular frame (23), a plurality of air inlets (222) are arranged in the side wall of the fixed tube (221) and located in the cavity of the rectangular frame (23), a spring (223) is arranged on the surface of the fixed tube (221) and located between the placing table (22) and the rectangular frame (23), and a sealing element is arranged in the fixed tube (221); The sealing element includes a fixed rod (231) arranged at the inner wall bottom of the rectangular frame (23), the top of the fixed rod (231) penetrates the fixed tube (221) and extends to the outside of the fixed tube (221), and one end of the fixed rod (231) extending to the outside of the fixed tube (221) is provided with a sealing plate (232) for sealing the opening part in the top of the fixed tube (221).

2. The steam dewatering apparatus of claim 1, wherein: The pressure element includes a fixed frame (30) arranged between the rectangular frame (23) and the bottom of the dewaxing box (20), a blocking ball (31) movably arranged at the top of the fixed frame (30), and a cross (33) arranged at the bottom of the fixed frame (30), and a spring (32) is arranged between the bottom of the blocking ball (31) and the top of the cross (33).

3. The steam delfnning apparatus of claim 2, wherein: The top of the fixed frame (30) is provided with a through hole (34) matched with the blocking ball (31), and the maximum diameter of the through hole (34) is smaller than the diameter of the blocking ball (31).

4. The steam dewaxing apparatus of claim 1, wherein: The steam generator (10) is externally provided with a heat preservation shell one (11), the heat preservation shell one (11) is communicated with the heat preservation shell two (21), the heat preservation shell one (11) is provided with a gas outlet pipe on the top of the side away from the heat preservation shell two (21), and the other end of the gas outlet pipe is communicated with a steam recovery device.

5. The steam dewaxing apparatus of claim 1 wherein: The placing table (22) further comprises a placing frame and three groups of enclosing fences (224) communicated and arranged on the top of the placing frame, the air outlet holes (225) are arranged on the top of the placing frame and the side wall of the enclosing fence (224), one end of the top of the placing frame without the enclosing fence (224) corresponds to the box door of the dewaxing box (20), the bottom of the placing frame is communicated with a boss (226), and the bottom of the boss (226) is communicated with a wax discharge pipe.

6. A steam dewatering dewaxing process characterized by: The steam dewaxing device of any one of claims 1-5 is adopted, The method comprises the following steps: S1: the filtered water first enters into the steam generator (10) through the pipeline, the water is heated to generate steam in the steam generator (10), and the steam enters into the cavity of the rectangular frame through the connecting pipe (12), S2: when the steam pressure in the cavity of the rectangular frame (23) is greater than the pressure of the pressure piece, the pressure piece is opened, the steam enters into the gap between the heat preservation shell two (21) and the dewaxing box (20), a heating layer is formed, and the dewaxing box (20) is preheated; S3: the object to be dewaxed is placed on the placing table (22), the placing table (22) is driven to move downward under the action of gravity, the opening part is controlled to be opened, the steam enters into the placing table (22) due to the decrease of the steam pressure in the rectangular frame (23), and the steam flows into the dewaxing box (20) through the air outlet hole (225), so that the object to be dewaxed in the dewaxing box (20) is heated and dewaxed.

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