Resin sand mixing device for casting and resin sand casting process thereof

Abstract

The invention discloses a casting resin sand mixing device which comprises a mixing barrel, a cleaning mechanism, an opening and closing control mechanism, a water pipe, a receiving hopper and a guide pipe, a stirring column is arranged in the mixing barrel, a telescopic stirring plate is arranged on the stirring column and used for mixing resin sand, and 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 resin sand residues on the inner wall of the mixing barrel and the outer wall of the stirring column, the telescopic control mechanism comprises an ejector rod, a rotating ring and a movable shifting column, the ejector rod descends under the action of the electric push rod, and the stirring plate is controlled to stretch out and draw back through the interaction of the rotating ring and the movable shifting column; when being cleaned, the mixing device disclosed by the invention has the beneficial effects that the cleaning process is simplified, the cleaning time is shortened, the production efficiency is improved, the labor intensity is reduced, the labor cost is reduced, the cleanliness of the interior of the mixing device and a stirrer is ensured and the like, and a more efficient, convenient and reliable guarantee is provided for casting production.

Description

Technical Field

[0001] The invention relates to the technical field of resin sand casting, in particular to a resin sand mixing device for casting and a resin sand casting process thereof. Background Art

[0002] In modern casting production, resin sand has been widely used as mold (core) sand. The preparation of resin sand is a key link. Raw materials such as resin, curing agent and filler need to be accurately injected into the mixing device, and the various components need to be fully stirred to ensure uniform mixing. Only in this way can the finished resin sand meet the requirements of the casting process. However, the existing resin sand mixing device often faces a thorny problem after completing the mixing process: a large amount of resin sand will remain inside the mixing device and on the agitator. These residues not only waste precious raw materials, but may also have an adverse effect on the next mixing operation. At present, most manufacturers still use manual cleaning to deal with these residues. However, due to the small internal space and complex structure of the mixing device, the cleaning process becomes extremely difficult, time-consuming and laborious; Therefore, how to design a mixing device that can automatically clean residual resin sand has become a technical problem that needs to be solved urgently in the foundry industry. 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 strong guarantee for casting production.

[0003] For this reason, we propose a resin sand mixing device for casting and a resin sand casting process thereof. Summary of the invention

[0004] The object of the present invention is to provide a resin sand mixing device for casting and a resin sand casting process thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] In the first aspect, in order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a resin sand mixing device for casting, comprising: A mixing barrel, wherein a stirring column is provided inside, and a retractable stirring plate is provided on the stirring column for mixing resin sand; 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 drive the cleaning ring to descend. The cleaning ring is used to clean the resin sand residue on the inner wall of the mixing barrel and the outer wall of the mixing column. The telescopic control mechanism includes a push rod, a rotating ring and a movable lever. The push rod is lowered by the electric push rod, and the telescopic movement of the stirring plate is controlled by the interaction between the rotating ring and the movable lever. The opening and closing control mechanism includes a connecting column, a dial ring, a blocking block and a connecting spring. The connecting column descends with the push rod, and the dial ring pushes the blocking block to move, thereby controlling the opening and closing of the opening and closing slot on the stirring column so that clean water can flow out during cleaning. The water pipe is arranged outside the mixing barrel and is used to inject clean water into the mixing barrel to form a spiral water flow, and cooperates with the cleaning ring for cleaning; The receiving hopper and the conduit are arranged below the mixing barrel, and the outflowing water and the cleaned resin sand are led out through the conduit.

[0006] Preferably, the cleaning mechanism further comprises a limiting rod and a pressing block, the limiting rod is connected to the U-shaped frame, the pressing block is arranged at the lower end of the limiting rod, and when the U-shaped frame descends, the pressing block first contacts and pushes the top rod to descend.

[0007] Preferably, the telescopic control mechanism also includes a reset spring and a square rod, the top rod is connected to the square rod through the reset spring, the reset spring is compressed when the top rod descends, and when cleaning is completed, the reset spring pushes the top rod up to extend the stirring plate.

[0008] Preferably, the opening and closing control mechanism also includes an inclined plane, and the lower end of the connecting column is provided with an inclined plane. When the connecting column descends, the inclined plane contacts the shift ring and pushes it to move, thereby driving the block to move toward the center of the stirring column to open the opening and closing groove.

[0009] Preferably, the shape of the cleaning ring is adapted to the inner wall of the mixing barrel and the outer wall of the stirring column, and can fit completely during the descent process to effectively scrape off the resin sand residue.

[0010] Preferably, a filtering device is provided inside the receiving hopper to separate the cleaned resin sand from water to achieve recycling of the resin sand.

[0011] Preferably, the electric push rod drives the lifting and lowering of the cleaning mechanism, and cooperates with the telescopic control mechanism and the opening and closing control mechanism to achieve automatic cleaning of the inner wall of the mixing barrel and the outer wall of the stirring column.

[0012] In a second aspect, the present application provides a resin sand casting process, including the following technical solutions: A resin sand casting process comprises the following steps: Step 1: Mold preparation Design and make molds according to the shape and size of the casting, ensuring the accuracy and surface smoothness of the mold to meet casting requirements.

[0013] Step 2: Resin sand preparation and mixing device cleaning Add raw materials such as resin, curing agent and filler into the mixing barrel of the mixing device in a certain proportion, start the device to stir, so that the raw materials are fully mixed and evenly mixed. The mixing barrel is equipped with a stirring column and a stirring plate, which are driven by a motor for stirring. After the mixing is completed, the resin sand is discharged through the output auger and injected into the mold; Subsequently, the electric push rod above the mixing barrel is started, and the U-shaped frame is driven to descend through its output end. During the descent of the U-shaped frame, the cleaning ring is driven to descend to clean the resin sand residue on the inner wall of the mixing barrel 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 linkage actions, the stirring plate is retracted into the stroke groove and the blocking block is moved into the opening and closing groove, thereby facilitating the outflow of cleaning water.

[0014] During the cleaning process, the water pipe supplies cleaning water to the mixing barrel through the conduit to further clean the inner wall of the mixing barrel and the outer wall of the stirring column. After the cleaning is completed, the electric push rod is started again to reset the U-shaped frame, and the stirring plate and the block are restored to their original positions to prepare for the next mixing operation; Step 3: Mold pouring Select appropriate casting equipment, pour the molten metal preheated to the appropriate temperature into the mold filled with resin sand, control the pouring speed and time, ensure that the molten metal evenly fills the mold cavity, and avoid pores and defects; Step 4: Mold curing and sand treatment After the molten metal cools and solidifies in the mold, the cooling speed and temperature are controlled to prevent cracks and deformation of the casting. After cooling, the casting is taken out of the mold, and sand is removed, trimmed and processed to obtain a casting product that meets the requirements; Compared with the prior art, the present invention has the following beneficial effects: The present invention can drive the U-shaped frame to descend by starting the electric push rod, thereby driving the cleaning ring and the pressing block to move synchronously. The pressing block squeezes the push rod during the descent process, and through the mechanical linkage, the rotating lever pushes the rotating lever groove on the rotating ring, thereby rotating the rotating ring. This rotation action drives the mixing blade to retract into the stroke groove, and at the same time, the inclined surface on the connecting column under the push rod retracts the blocking block into the opening and closing groove. This design enables the mixing blade and the blocking block to be automatically retracted into the corresponding groove while the cleaning ring descends to clean the inside of the mixing device, thereby providing convenience for the subsequent outflow of cleaning water. This design not only simplifies the cleaning process, but also greatly shortens the cleaning time and improves production efficiency. Compared with the traditional manual cleaning method, the mixing device of the present invention realizes automatic cleaning, reduces 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, ensure the cleanliness of the inside of the mixing device and the agitator, and provide better conditions for the next mixing operation; In summary, the beneficial effects exhibited by the mixing device of the present invention during cleaning include simplifying the cleaning process, shortening the 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, etc., providing a more efficient, convenient and reliable guarantee for casting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention without the electric push rod and other structures; Figure 3 This is a schematic diagram of the internal structure of the mixing barrel of the present invention; Figure 4 This is one of the schematic diagrams of the internal structure of the stirring rod of the present invention; Figure 5 This is the second schematic diagram of the internal structure of the stirring rod of the present invention; Figure 6 It is a schematic diagram of the structure of several rotating rings and mixing blades of the present invention; Figure 7 This is a schematic diagram of the rotary dial column structure of the present invention; Figure 8 It is a schematic diagram of the block structure of the present invention.

[0016] In the figure: 1. mixing barrel; 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. travel groove; 115. swivel; 118. square rod; 119. return spring; 1110. push rod; 1114. moving dial column; 121. opening and closing groove; 122. blocking block; 123. connecting spring; 124. dial ring; 125. connecting column; 126. inclined plane; 128. electric push rod; 129. U-shaped frame; 1211. limit rod; 1212. pressing block. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The embodiment of the present application discloses a resin sand casting device.

[0019] See also Figure 1-8As shown, a resin sand mixing device for casting includes: a mixing barrel 1, a cleaning mechanism, an opening and closing control mechanism 12, a water pipe 6, a hopper 7 and a guide tube 15. A stirring column 2 is arranged inside the mixing barrel 1, and a retractable stirring plate 3 is arranged on the stirring column 2 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 drive the cleaning ring 10 to descend. The cleaning ring 10 is used to clean the resin sand residue on the inner wall of the mixing barrel 1 and the outer wall of the stirring column 2. The mechanism 11 includes a push rod 1110, a rotating ring 115 and a movable lever 1114. The push rod 1110 descends under the action of the electric push rod 128. The stirring plate 3 is controlled to extend and retract through the interaction of the rotating ring 115 and the movable lever 1114. The opening and closing control mechanism 12 includes a connecting column 125, a lever ring 124, a blocking block 122 and a connecting spring 123. The connecting column 125 descends with the push rod 1110, and the lever ring 124 pushes the blocking block 122 to move, thereby controlling the opening and closing of the opening and closing slot 121 on the stirring column 2, so that the stirring plate 3 can be cleaned. The water pipe 6 is arranged outside the mixing barrel 1 to inject clean water into the mixing barrel 1 to form a spiral water flow, and the cleaning ring 10 is used for cleaning. The receiving hopper 7 is arranged below the mixing barrel 1 to guide the outflowing water and the cleaned resin sand through the conduit 15. The telescopic control mechanism 11 also includes a reset spring 119 and a square rod 118. The top rod 1110 is connected to the square rod 118 through the reset spring 119. When the top rod 1110 descends, the reset spring 119 is compressed. When the cleaning is completed, the reset spring 119 pushes The push rod 1110 rises to extend the stirring plate 3. The opening and closing control mechanism 12 also includes a slope 126. The lower end of the connecting column 125 is provided with a slope 126. When the connecting column 125 descends, the slope 126 contacts the dial ring 124 and pushes it to move, thereby driving the blocking block 122 to move toward the center of the stirring column 2 to open the opening and closing groove 121. The device drives the lifting and lowering of the cleaning mechanism through the electric push rod 128, and cooperates with the telescopic control mechanism 11 and the opening and closing control mechanism 12 to realize automatic cleaning of the inner wall of the mixing barrel 1 and the outer wall of the stirring column 2.

[0020] See also Figure 2-7 As shown, the cleaning mechanism also includes a limit rod 1211 and a pressing block 1212. The limit rod 1211 is connected to the U-shaped frame 129. The pressing block 1212 is arranged at the lower end of the limit rod 1211. When the U-shaped frame 129 descends, the pressing block 1212 first contacts and pushes the top rod 1110 to descend. 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. They can fit completely during the descent process and effectively scrape off the residual resin sand. A filtering device is arranged inside the receiving hopper 7 to separate the cleaned resin sand from water to realize the recycling of the resin sand.

[0021] See also Figure 1-8As shown, the present application also discloses a resin sand casting process, comprising the following steps: Step 1: Mold preparation Design and make molds according to the shape and size of the casting, ensuring the accuracy and surface smoothness of the mold to meet casting requirements.

[0022] Step 2: Resin sand preparation and mixing device cleaning Add raw materials such as resin, curing agent and filler into the mixing barrel 1 of the mixing device in a certain proportion, start the device to stir, so that the raw materials are fully mixed and evenly mixed. The mixing barrel 1 is provided with a stirring column 2 and a stirring plate 3, which are driven by a motor 4 for stirring. After the mixing is completed, the resin sand is discharged through the output auger 5 and injected into the mold; Then, the electric push rod 128 above the mixing barrel 1 is started, and the U-shaped frame 129 is driven to descend through its output end. During the descent of the U-shaped frame 129, the cleaning ring 10 is driven to descend 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 actions, the stirring plate 3 is retracted into the stroke groove 114, and the blocking block 122 is moved into the opening and closing groove 121, so as to facilitate the outflow of the cleaning water; During the cleaning process, the water pipe 6 supplies cleaning water to the mixing barrel 1 through the conduit 15 to further clean the inner wall of the mixing barrel 1 and the outer wall of the stirring column 2. After the cleaning is completed, the electric push rod 128 is started again to reset the U-shaped frame 129, and the stirring plate 3 and the blocking block 122 are restored to their original positions, preparing for the next mixing operation; Step 3: Mold pouring Select appropriate casting equipment, pour the molten metal preheated to the appropriate temperature into the mold filled with resin sand, control the pouring speed and time, ensure that the molten metal evenly fills the mold cavity, and avoid pores and defects; Step 4: Mold curing and sand treatment After the molten metal cools and solidifies in the mold, the cooling rate and temperature are controlled to prevent cracks and deformation of the casting. After cooling is completed, the casting is taken out of the mold for sand removal, trimming and processing to obtain a casting product that meets the requirements.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A resin sand mixing device for casting, characterized in that: include: A mixing barrel (1) is provided with a stirring column (2) inside, and a retractable stirring plate (3) is provided on the stirring column (2) for mixing resin sand; The cleaning mechanism comprises an electric push rod (128), a U-shaped frame (129) and a cleaning ring (10), wherein 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 to clean the resin sand residue on the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2); The telescopic control mechanism (11) comprises a push rod (1110), a rotating ring (115) and a movable lever (1114); the push rod (1110) descends under the action of the electric push rod (128); and the telescopic movement of the stirring plate (3) is controlled through the interaction between the rotating ring (115) and the movable lever (1114); The opening and closing control mechanism (12) comprises a connecting column (125), a dial ring (124), a blocking block (122) and a connecting spring (123). The connecting column (125) descends along with the push rod (1110), and the dial ring (124) pushes the blocking block (122) to move, thereby controlling the opening and closing of the opening and closing groove (121) on the stirring column (2) so as to allow clean water to flow out during cleaning. A water pipe (6) is arranged outside the mixing barrel (1) and is used to inject clean water into the mixing barrel (1) to form a spiral water flow, and cooperate with the cleaning ring (10) for cleaning; A material receiving hopper (7) and a conduit (15), wherein the material receiving hopper (7) is arranged below the mixing barrel (1) and discharges the outflowing water and the washed resin sand through the conduit (15).

2. A resin sand mixing device for casting according to claim 1, characterized in that: The cleaning mechanism further comprises a limiting rod (1211) and a pressing block (1212); the limiting rod (1211) is connected to the U-shaped frame (129); 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) first contacts and pushes the top rod (1110) to descend.

3. A resin sand mixing device for casting according to claim 1 or 2, characterized in that: The telescopic control mechanism (11) further comprises a return spring (119) and a square rod (118); the top rod (1110) is connected to the square rod (118) via the return spring (119); when the top rod (1110) descends, the return spring (119) is compressed; when cleaning is completed, the return spring (119) pushes the top rod (1110) upward, causing the stirring plate (3) to extend.

4. The resin sand mixing device for casting according to claim 1, characterized in that: The opening and closing control mechanism (12) further comprises an inclined surface (126). The lower end of the connecting column (125) is provided with the 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 blocking block (122) to move toward the center of the stirring column (2) to open the opening and closing groove (121).

5. The resin sand mixing device for casting according to claim 1, characterized in that: 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 can be completely fitted thereto during the descending process, thereby effectively scraping off the residual resin sand.

6. The resin sand mixing device for casting according to claim 1, characterized in that: The receiving hopper (7) is provided with a filtering device inside, which is used to separate the cleaned resin sand from water, thereby realizing the recycling of the resin sand.

7. A resin sand mixing device for casting according to claim 6, characterized in that: The electric push rod (128) drives the cleaning mechanism to rise and fall, and cooperates with the telescopic control mechanism (11) and the opening and closing control mechanism (12) to achieve automatic cleaning of the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2).

8. A resin sand casting process, characterized in that: Applicable to the resin sand mixing device for casting as described in any one of claims 1 to 7: Step 1: Mold preparation Design and make molds according to the shape and size of castings, ensuring the accuracy and surface smoothness of the molds to meet casting requirements; Step 2: Resin sand preparation and mixing device cleaning Raw materials such as resin, curing agent and filler are added into a mixing barrel (1) of a mixing device in a certain proportion, and the device is started to stir the raw materials so that the raw materials are fully and evenly mixed. A stirring column (2) and a stirring plate (3) are provided inside the mixing barrel (1) and stirred by a motor. After the mixing is completed, the resin sand is discharged through an output auger (5) and injected into the mold; Subsequently, the electric push rod (128) above the mixing barrel (1) is started, and the U-shaped frame (129) is driven to descend through its output end. During the descent of the U-shaped frame (129), the cleaning ring (10) is driven to descend 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 actions, the stirring plate (3) is retracted into the stroke groove (114), and the blocking block (122) is moved into the opening and closing groove (121), thereby facilitating the outflow of cleaning water. During the cleaning process, the water pipe (6) supplies cleaning water into the mixing barrel (1) through the conduit (15) to further clean the inner wall of the mixing barrel (1) and the outer wall of the stirring column (2). After the cleaning is completed, the electric push rod (128) is started again to reset the U-shaped frame (129), and the stirring plate (3) and the blocking block (122) are restored to their original positions, preparing for the next mixing operation; Step 3: Mold pouring Select appropriate casting equipment, pour the molten metal preheated to the appropriate temperature into the mold filled with resin sand, control the pouring speed and time, ensure that the molten metal evenly fills the mold cavity, and avoid pores and defects; Step 4: Mold curing and sand treatment After the molten metal cools and solidifies in the mold, the cooling rate and temperature are controlled to prevent cracks and deformation of the casting. After cooling is completed, the casting is taken out of the mold for sand removal, trimming and processing to obtain a casting product that meets the requirements.

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