A resin sand mixing device for casting and a resin sand casting process thereof

Abstract

The application discloses a resin sand mixing device for casting, which comprises a mixing bucket, a cleaning mechanism, an opening and closing control mechanism, a water pipe, a receiving hopper and a guide pipe. An agitator column is arranged in the mixing bucket, and a retractable agitator plate is arranged on the agitator column for mixing resin sand. The cleaning mechanism comprises an electric push rod, a U-shaped frame and a cleaning ring. The electric push rod drives the U-shaped frame to drive the cleaning ring to descend. The cleaning ring is used for cleaning the resin sand residues on the inner wall of the mixing bucket and the outer wall of the agitator column. The retracting control mechanism comprises a jacking rod, a rotating ring and a moving push rod. The jacking rod descends under the action of the electric push rod. Through the interaction of the rotating ring and the moving push rod, the retracting of the agitator plate is controlled. The resin sand mixing device exhibits the beneficial effects of simplifying the cleaning process, shortening the cleaning time, improving the production efficiency, reducing the labor intensity, reducing the labor cost and ensuring the cleanliness of the interior of the mixing device and the agitator, and provides more efficient, convenient and reliable protection for the casting production.

Description

Technical Field

[0001] This invention relates to the field of resin sand casting technology, specifically to a resin sand mixing device for casting and its resin sand casting process. Background Technology

[0002] In modern casting production, resin sand is widely used as molding (core) sand. The preparation of resin sand is a crucial step, requiring the precise injection of raw materials such as resin, curing agent, and filler into the mixing device, and thorough stirring to ensure that the various components are uniformly mixed. Only in this way can the prepared resin sand product meet the requirements of the casting process.

[0003] However, existing resin sand mixing equipment often faces a thorny problem after the mixing process: a large amount of resin sand remains inside the mixing unit and on the agitator. This residue not only wastes valuable raw materials but may also adversely affect subsequent mixing operations. Currently, most manufacturers still use manual cleaning to remove these residues. However, due to the confined space and complex structure inside the mixing unit, the cleaning process becomes extremely difficult, time-consuming, and labor-intensive.

[0004] Therefore, designing a mixing device that can automatically clean residual resin sand has become a technical problem that the foundry industry urgently needs to solve. Such a device can not only improve production efficiency and reduce labor costs, but also ensure that the quality of the resin sand mixed each time is stable and reliable, providing a strong guarantee for foundry production.

[0005] Therefore, we propose a resin sand mixing device for casting and its resin sand casting process. Summary of the Invention

[0006] The purpose of this invention is to provide a resin sand mixing device for casting and a resin sand casting process thereof, so as to solve the problems mentioned in the background art.

[0007] Firstly, to achieve the above objectives, the present invention provides the following technical solution: a resin sand mixing device for casting, comprising:

[0008] A mixing tank, which has an internal stirring column with a retractable stirring plate for mixing resin sand;

[0009] The cleaning mechanism includes an electric push rod, a U-shaped frame, and a cleaning ring. The electric push rod drives the U-shaped frame to lower the cleaning ring, which is used to clean the resin sand residue on the inner wall of the mixing tank and the outer wall of the mixing column.

[0010] The telescopic control mechanism includes a push rod, a rotating ring, and a movable deflector. The push rod descends under the action of an electric push rod, and the telescopic movement of the stirring plate is controlled by the interaction of the rotating ring and the movable deflector.

[0011] The opening and closing control mechanism includes a connecting column, a push ring, a block and a connecting spring. The connecting column descends with the top rod, and the block is pushed to move by the push ring, thereby controlling the opening and closing of the opening and closing groove on the stirring column, so that clean water flows out during cleaning.

[0012] The water pipe is arranged outside the mixing bucket and is used to inject clean water into the mixing bucket to form a spiral water flow, which cooperates with the cleaning ring to clean.

[0013] The receiving hopper is arranged below the mixing bucket, and the outflowing water and the cleaned resin sand are guided out through the guide pipe.

[0014] Preferably, the cleaning mechanism further comprises a limiting rod and a pressing block. The limiting rod is connected with the U-shaped frame, and the pressing block is arranged at the lower end of the limiting rod. When the U-shaped frame descends, the pressing block first contacts and pushes the top rod to descend.

[0015] Preferably, the telescopic control mechanism further comprises a reset spring and a square rod. The top rod is connected to the square rod through the reset spring. When the top rod descends, the reset spring is compressed. After cleaning is completed, the reset spring pushes the top rod to ascend, so that the stirring plate extends out.

[0016] Preferably, the opening and closing control mechanism further comprises an inclined surface. The lower end of the connecting column is provided with an inclined surface. When the connecting column descends, the inclined surface contacts the push ring and pushes it to move, thereby driving the block to move towards the center of the stirring column, so as to open the opening and closing groove.

[0017] Preferably, the shape of the cleaning ring is adapted to the inner wall of the mixing bucket and the outer wall of the stirring column, and can completely adhere during the descending process, so as to effectively scrape off the resin sand residue.

[0018] Preferably, a filtering device is arranged in the receiving hopper, which is used to separate the cleaned resin sand from the water, so as to realize the recycling of the resin sand.

[0019] Preferably, the electric push rod drives the cleaning mechanism to ascend and descend, cooperates with the telescopic control mechanism and the opening and closing control mechanism, and realizes the automatic cleaning of the inner wall of the mixing bucket and the outer wall of the stirring column.

[0020] In a second aspect, the application provides a resin sand casting process, comprising the following technical solutions:

[0021] A resin sand casting process comprises the following steps:

[0022] Step 1: Mould preparation

[0023] The mould is designed and manufactured according to the shape and size of the casting, so as to ensure the accuracy and surface smoothness of the mould to meet the casting requirements.

[0024] Step 2: Preparation of resin sand and cleaning of mixing device

[0025] Resin, curing agent and filler and other raw materials are added to the mixing tank of the mixing device in a certain proportion. The device is started to stir so that the raw materials are fully mixed and uniform. The mixing tank is equipped with a stirring column and a stirring plate. The stirring is driven by a motor. After the mixing is completed, the resin sand is discharged through the output auger and injected into the mold.

[0026] Subsequently, the electric push rod above the mixing tank is activated, which drives the U-shaped frame to descend through its output end. During the descent of the U-shaped frame, the cleaning ring descends to clean the resin sand residue on the inner wall of the mixing tank and the outer wall of the mixing column. At the same time, the pressing block contacts and pushes the top rod to descend. Through a series of mechanical linkages, the mixing plate is retracted into the stroke groove, and the blockage block is moved into the opening and closing groove, thereby facilitating the outflow of cleaning water.

[0027] During the cleaning process, water is supplied to the mixing tank through the conduit to further clean the inner wall of the mixing tank and the outer wall of the stirring column. After cleaning, the electric push rod is activated again to reset the U-shaped frame, and the stirring plate and block are returned to their original positions, ready for the next mixing operation.

[0028] Step 3: Mold casting

[0029] Select appropriate casting equipment, pour the preheated molten metal to the appropriate temperature into the mold filled with resin sand, control the pouring speed and time to ensure that the molten metal fills the mold cavity evenly and avoids the generation of porosity and defects;

[0030] Step 4: Mold curing and sand molding

[0031] After the molten metal cools and solidifies in the mold, the cooling rate and temperature are controlled to prevent cracks and deformation in the casting. Once cooling is complete, the casting is removed from the mold and subjected to desanding, trimming, and machining to obtain a casting product that meets the requirements.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] This invention, by activating an electric push rod, can drive the U-shaped frame to descend, thereby causing the cleaning ring and pressing block to move synchronously. During the descent, the pressing block squeezes the top rod, and through mechanical linkage, the rotating pin moves the rotating groove on the rotating ring, causing the rotating ring to rotate. This rotation causes the mixing blades to retract into the stroke groove. At the same time, the inclined surface on the connecting column below the top rod causes the blockage to retract into the opening and closing groove. This design allows the mixing blades and blockage to automatically retract into the corresponding grooves while the cleaning ring descends to clean the inside of the mixing device, facilitating the subsequent outflow of cleaning water.

[0034] This design not only simplifies the cleaning process but also significantly shortens cleaning time and improves production efficiency. Compared to traditional manual cleaning methods, the mixing device of this invention achieves automatic cleaning, reducing labor intensity and labor costs. At the same time, because the cleaning process is more thorough, it can effectively reduce the residue of resin sand, ensuring the cleanliness of the inside of the mixing device and the agitator, and providing better conditions for the next mixing operation.

[0035] In summary, the beneficial effects of the mixing device of the present invention during cleaning include simplifying the cleaning process, shortening cleaning time, improving production efficiency, reducing labor intensity, reducing labor costs, and ensuring the cleanliness of the inside of the mixing device and the agitator, thus providing a more efficient, convenient and reliable guarantee for casting production. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the overall structure of the present invention excluding the electric actuator and other structural components;

[0038] Figure 3 This is a schematic diagram of the internal structure of the mixing tank of the present invention;

[0039] Figure 4 This is one of the schematic diagrams of the internal structure of the stirring rod of the present invention;

[0040] Figure 5 This is the second schematic diagram of the internal structure of the stirring rod of the present invention;

[0041] Figure 6 This is a schematic diagram of several rotating and hybrid blade structures of the present invention;

[0042] Figure 7 This is a schematic diagram of the rotating paddle structure of the present invention;

[0043] Figure 8 This is a schematic diagram of the block structure of the present invention.

[0044] In the diagram: 1. Mixing tank; 2. Stirring column; 3. Stirring plate; 5. Output auger; 6. Water pipe; 7. Receiving hopper; 10. Cleaning ring; 11. Telescopic control mechanism; 12. Opening and closing control mechanism; 15. Guide tube; 114. Stroke groove; 115. Rotary ring; 118. Square rod; 119. Return spring; 1110. Top rod; 1114. Moving deflector; 121. Opening and closing groove; 122. Block; 123. Connecting spring; 124. Deflector ring; 125. Connecting column; 126. Inclined surface; 128. Electric push rod; 129. U-shaped frame; 1211. Limiting rod; 1212. Pressing block. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] This application discloses a resin sand casting equipment.

[0047] Please see Figures 1-8 As shown, a resin sand mixing device for casting includes: a mixing tank 1, a cleaning mechanism, an opening and closing control mechanism 12, a water pipe 6, a receiving hopper 7, and a conduit 15. The mixing tank 1 has an internal stirring column 2, and the stirring column 2 has a retractable stirring plate 3 for mixing resin sand. The cleaning mechanism includes an electric push rod 128, a U-shaped frame 129, and a cleaning ring 10. The electric push rod 128 drives the U-shaped frame 129 to lower the cleaning ring 10. The cleaning ring 10 is used to clean the resin sand residue on the inner wall of the mixing tank 1 and the outer wall of the stirring column 2. The opening and closing control mechanism is... Mechanism 11 includes a push rod 1110, a rotating ring 115, and a movable deflector 1114. The push rod 1110 descends under the action of the electric push rod 128. Through the interaction of the rotating ring 115 and the movable deflector 1114, the extension and retraction of the stirring plate 3 are controlled. The opening and closing control mechanism 12 includes a connecting column 125, a deflector 124, a block 122, and a connecting spring 123. The connecting column 125 descends with the push rod 1110. Through the deflector 124, the block 122 is moved, controlling the opening and closing of the opening and closing groove 121 on the stirring column 2, so as to facilitate cleaning. The system allows clean water to flow out. A water pipe 6 is located outside the mixing tank 1 to inject clean water into the mixing tank 1, forming a spiral water flow that works in conjunction with the cleaning ring 10 for cleaning. A receiving hopper 7 is located below the mixing tank 1, and a conduit 15 discharges the flowing water and cleaned resin sand. The telescopic control mechanism 11 also includes a return spring 119 and a square rod 118. The push rod 1110 is connected to the square rod 118 via the return spring 119. When the push rod 1110 descends, it compresses the return spring 119. After cleaning is complete, the return spring 119 pushes the return rod 118 back down. The top rod 1110 rises, causing the stirring plate 3 to extend. The opening and closing control mechanism 12 also includes an inclined surface 126. The lower end of the connecting column 125 is provided with an inclined surface 126. When the connecting column 125 descends, the inclined surface 126 contacts the dial ring 124 and pushes it to move, thereby driving the block 122 to move towards the center of the stirring column 2 and opening the opening and closing groove 121. This device drives the lifting and lowering of the cleaning mechanism through the electric push rod 128. In conjunction with the telescopic control mechanism 11 and the opening and closing control mechanism 12, it realizes the automatic cleaning of the inner wall of the mixing tank 1 and the outer wall of the stirring column 2.

[0048] Please see Figures 2-7As shown, the cleaning mechanism also includes a limiting rod 1211 and a pressing block 1212. The limiting rod 1211 is connected to the U-shaped frame 129, and the pressing block 1212 is located at the lower end of the limiting rod 1211. When the U-shaped frame 129 descends, the pressing block 1212 first contacts and pushes the top rod 1110 down. The shape of the cleaning ring 10 is adapted to the inner wall of the mixing tank 1 and the outer wall of the stirring column 2, and can completely fit during the descent process, effectively scraping off the resin sand residue. The receiving hopper 7 is equipped with a filter device to separate the cleaned resin sand from the water, so as to realize the recycling of resin sand.

[0049] Please see Figures 1-8 As shown in the embodiment, this application also discloses a resin sand casting process, including the following steps: Step 1: Mold preparation

[0050] The mold is designed and manufactured according to the shape and size of the casting, ensuring the accuracy and surface smoothness of the mold to meet the casting requirements.

[0051] Step 2: Resin Sand Preparation and Cleaning of Mixing Equipment

[0052] Resin, curing agent, and filler are added to the mixing tank 1 of the mixing device in a certain proportion. The device is then started to stir, ensuring that the raw materials are thoroughly and evenly mixed. The mixing tank 1 is equipped with a stirring column 2 and a stirring plate 3, and is driven by a motor 4 for stirring. After mixing is complete, the resin sand is discharged through the output auger 5 and injected into the mold.

[0053] Subsequently, the electric push rod 128 above the mixing tank 1 is activated, which drives the U-shaped frame 129 to descend through its output end. During the descent of the U-shaped frame 129, the cleaning ring 10 descends to clean the resin sand residue on the inner wall of the mixing tank 1 and the outer wall of the stirring column 2. At the same time, the pressing block 1212 contacts and pushes the top rod 1110 to descend. Through a series of mechanical linkages, the stirring plate 3 is retracted into the stroke groove 114, and the block 122 moves into the opening and closing groove 121, thereby facilitating the outflow of cleaning water.

[0054] During the cleaning process, water pipe 6 supplies cleaning water to the mixing tank 1 through conduit 15 to further clean the inner wall of the mixing tank 1 and the outer wall of the stirring column 2. After cleaning, the electric push rod 128 is activated again to reset the U-shaped frame 129, and the stirring plate 3 and the block 122 return to their original positions, ready for the next mixing operation.

[0055] Step 3: Mold casting

[0056] Select appropriate casting equipment, pour the preheated molten metal to the appropriate temperature into the mold filled with resin sand, control the pouring speed and time to ensure that the molten metal fills the mold cavity evenly and avoids the generation of porosity and defects;

[0057] Step 4: Mold curing and sand molding

[0058] After the molten metal cools and solidifies in the mold, the cooling rate and temperature are controlled to prevent cracks and deformation in the casting. After cooling is complete, the casting is removed from the mold and subjected to sand removal, trimming and processing to obtain a casting product that meets the requirements.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resin sand mixing device for casting, characterized in that, The application relates to a resin sand mixing device. The resin sand mixing device comprises a mixing barrel (1) internally provided with a stirring column (2), wherein a telescopic stirring plate (3) is arranged on the stirring column (2) and used for mixing resin sand; a cleaning mechanism is arranged on the resin sand mixing device, wherein the cleaning mechanism comprises an electric push rod (128), a U-shaped frame (129) and a cleaning ring (10), the electric push rod (128) drives the U-shaped frame (129) to drive the cleaning ring (10) to descend, and the cleaning ring (10) is used for cleaning resin sand residues on the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2); the shape of the cleaning ring (10) is adapted to the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2), and the cleaning ring (10) can completely adhere to the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2) during the descending process, so that the resin sand residues can be effectively scraped off; a telescopic control mechanism (11) is arranged on the resin sand mixing device, wherein the telescopic control mechanism (11) comprises a top rod (1110), a rotating ring (115) and a moving push rod (1114), the top rod (1110) descends under the action of the electric push rod (128), the telescopic control mechanism (11) controls the telescopic movement of the stirring plate (3) through the interaction between the rotating ring (115) and the moving push rod (1114); an opening and closing control mechanism (12) is arranged on the resin sand mixing device, wherein the opening and closing control mechanism (12) comprises a connecting column (125), a push ring (124), a blocking block (122) and a connecting spring (123), the connecting column (125) descends along with the top rod (1110), the push ring (124) pushes the blocking block (122) to move, and the opening and closing control mechanism (12) controls the opening and closing of an opening and closing groove (121) on the stirring column (2) so that clean water can flow out during the cleaning process; a water pipe (6) is arranged outside the mixing barrel (1) and used for injecting clean water into the mixing barrel (1) to form a spiral water flow and cooperate with the cleaning ring (10) to clean; a material receiving hopper (7) and a guide pipe (15) are arranged below the mixing barrel (1), and the water and the cleaned resin sand flow out through the guide pipe (15). The cleaning mechanism further comprises a limiting rod (1211) and a pressing block (1212), the limiting rod (1211) is connected with the U-shaped frame (129), and the pressing block (1212) is arranged at the lower end of the limiting rod (1211); when the U-shaped frame (129) descends, the pressing block (1212) firstly contacts and pushes the top rod (1110) to descend. The telescopic control mechanism (11) further comprises a reset spring (119) and a square rod (118), the top rod (1110) is connected with the square rod (118) through the reset spring (119), the reset spring (119) is compressed when the top rod (1110) descends, and the reset spring (119) pushes the top rod (1110) to ascend after the cleaning is completed, so that the stirring plate (3) is extended. The opening and closing control mechanism (12) further comprises an inclined surface (126), the connecting column (125) is provided with the inclined surface (126) at the lower end, the inclined surface (126) contacts and pushes the push ring (124) to move when the connecting column (125) descends, and then the blocking block (122) is driven to move towards the center of the stirring column (2) to open the opening and closing groove (121). The material receiving hopper (7) is internally provided with a filtering device, which is used for separating the cleaned resin sand from water and realizes the recycling of the resin sand. ​ 2. A resin sand mixing apparatus for casting according to claim 1, characterized in that: ​ 3. A resin sand mixing apparatus for casting according to claim 1 or 2, characterized in that: ​ 4. The resin sand mixing apparatus for casting according to claim 1, characterized by: ​ 5. The resin sand mixing apparatus for casting according to claim 1, characterized by: ​ 6. A resin sand mixing apparatus for casting according to claim 5, wherein: The electric push rod (128) drives the lifting of the cleaning mechanism, cooperates with the telescopic control mechanism (11) and the opening and closing control mechanism (12), and realizes the automatic cleaning of the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2).

7. A resin sand casting process characterized by: The resin sand mixing device is suitable for the resin sand mixing device according to any one of claims 1-6. Step one: mold preparation According to the shape and size of the casting, the mold is designed and made, and the accuracy and surface smoothness of the mold are ensured to meet the casting requirements; Step two: resin sand preparation and mixing device cleaning The raw materials such as resin, curing agent and filler are added into the mixing barrel (1) of the mixing device according to a certain proportion, and the device is started to stir, so that the raw materials are fully mixed and uniform, the mixing barrel (1) is provided with a stirring column (2) and a stirring plate (3), and the stirring is driven by a motor, after the mixing is completed, the resin sand is guided out through the output auger (5) and injected into the mold; Then, the electric push rod (128) above the mixing barrel (1) is started, the U-shaped frame (129) is driven to descend through the output end, the U-shaped frame (129) descends, the cleaning ring (10) is lowered to clean the resin sand residue on the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2), at the same time, the pressing block (1212) contacts and pushes the top rod (1110) to descend, through a series of mechanical linkage, the stirring plate (3) is retracted into the stroke groove (114), and the block (122) is moved into the opening and closing groove (121), so that the water flow is facilitated; During the cleaning process, the water pipe (6) supplies cleaning water to the mixing barrel (1) through the pipe (15), further cleaning the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2), after cleaning, the electric push rod (128) is started again to reset the U-shaped frame (129), the stirring plate (3) and the block (122) return to the original position, and prepare for the next mixing operation; Step three: mold pouring Select appropriate casting equipment, pour the metal melt preheated to an appropriate temperature into the mold filled with resin sand, control the pouring speed and time, ensure that the metal melt uniformly fills the mold cavity, and avoid generating pores and defects; Step four: mold curing and sand treatment After the metal melt is cooled and solidified in the mold, control the cooling speed and temperature to prevent cracks and deformation of the casting, after cooling, the casting is taken out of the mold, and the sand is removed, trimmed and processed to obtain a casting product that meets the requirements.

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