Casting molding sand screening device for casting
The graded crushing and screening device for foundry sand solves the problems of unsatisfactory crushing effect and easy screen clogging in existing devices, and achieves efficient screening of foundry sand of various particle sizes, reducing the labor intensity of operators and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-17
AI Technical Summary
Existing foundry sand screening devices suffer from unsatisfactory crushing effects, easy screen clogging, and inability to simultaneously screen multiple types of foundry sand with different particle sizes, increasing the labor intensity of operators and affecting production efficiency.
It adopts a primary crushing component, a primary screen plate, a secondary crushing component, and a secondary screen plate. Through graded crushing and screening, combined with a screen frame that can move left and right and be inclined, multiple crushing and screening are achieved. Large particles of material are automatically slid off to avoid clogging and accurately screen foundry sand of different particle sizes.
It improves the crushing effect, reduces screen plate clogging, reduces the labor intensity of operators, and increases production efficiency. It can accurately screen out foundry sand of different particle sizes according to particle size requirements.
Smart Images
Figure CN223997251U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screening device technology, and in particular to a screening device for casting molding sand. Background Technology
[0002] Casting is an important metalworking process that involves pouring molten liquid metal into a mold cavity that matches the shape of the part, allowing it to cool and solidify to obtain the desired part or blank. In modern casting production lines, casting sand, as an important molding material, needs to undergo processing steps such as crushing, screening, and regeneration after the casting process is completed, before being sent back to the previous molding process for reuse.
[0003] Currently, the screening devices commonly used in the foundry industry are mostly integrated crushing and screening machines. During operation, foundry sand is fed into the crusher for initial crushing, and the crushed sand is then screened through the screen below.
[0004] However, this traditional screening device has the following problems in practical use: First, the crushing effect of the crusher is often not ideal, resulting in a large number of large particles still remaining in the crushed foundry sand. These large particles easily accumulate above the screen, causing screen blockage. Furthermore, the large particles of foundry sand screened out need to be manually removed; if the particles are too large, they need to be put back into the crusher for secondary crushing. This not only increases the labor intensity of the operators but also seriously affects production efficiency. Second, most existing screening devices use screens with a single aperture, which means that only foundry sand within a fixed particle size range can be screened during the screening process, making it impossible to simultaneously screen foundry sand of multiple different particle sizes. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a casting sand screening device for casting. The technical solution of this utility model is as follows:
[0006] A casting sand screening device includes a screening box and two sets of vertically distributed movable frames. A primary crushing component is fixedly connected to the upper end of the screening box. A feed inlet, communicating with the lower discharge port of the primary crushing component, is opened through the right side of the upper surface of the screening box. The two sets of movable frames are slidably connected horizontally to the upper and lower parts of the screening box. A primary screen frame with an opening on the left and tilted to the left is connected to the upper side of the upper movable frame, and a primary screen plate is detachably connected to the inner bottom surface of the primary screen frame. A secondary screen frame with an opening on the right and tilted to the right is connected to the upper side of the lower movable frame, and a secondary screen plate is detachably connected to the inner bottom surface of the secondary screen frame. The screen holes of the primary screen plate are straight. The diameter of the screen is larger than the diameter of the screen hole of the secondary screen plate. A driving component for driving the movable frame to move laterally and reciprocally is connected to one side of the movable frame. A secondary crushing assembly is connected to the left side of the screening box and between the primary screen frame and the secondary screen frame. The secondary crushing assembly includes a crushing barrel and a circular screen plate that is detachably connected to the bottom of the crushing barrel. The feed end of the crushing barrel is located on the lower left side of the primary screen frame, and the discharge end of the crushing barrel is located on the upper left side of the secondary screen frame. The diameter of the screen hole of the circular screen plate is the same as the diameter of the screen hole of the primary screen plate. The lower surface of the screening box is respectively provided with a discharge port one for receiving the material under the screen of the secondary screen plate and a discharge port two for receiving the material left on the upper surface of the secondary screen plate.
[0007] Optionally, the primary crushing component is a hammer crusher.
[0008] Optionally, the screening box is hinged to a main door on the front side. Multiple sets of support rods for supporting the secondary screen plate are fixedly connected to the lower interior of the secondary screen frame. Guide rods for slowing material sliding down are fixedly connected to the front and rear walls of the secondary screen frame. Slots for inserting the secondary screen plate are provided through the front and rear walls of the secondary screen frame. The secondary screen plate is located between the support rods and the guide rods. A funnel-shaped discharge hopper is fixedly connected to the lower end of the secondary screen frame. An ear plate is fixedly connected to the front side of the secondary screen plate, and the ear plate is fixed to the secondary screen frame with bolts. A handle is fixedly connected to the middle of the front side of the secondary screen plate.
[0009] Optionally, two sets of symmetrically arranged slide rails are fixedly installed at the top and bottom of the screening box. Main pulleys are rotatably connected to the front and rear sides of the movable frame. The main pulleys are slidably connected inside the slide rails at the corresponding positions. The driving component includes a reciprocating electric push rod, a fixing seat, and a protective shell fixed to the outer wall of the screening box. The fixing seat is fixedly connected to the telescopic end of the reciprocating electric push rod. The side of the fixing seat away from the reciprocating electric push rod is fixedly connected to the movable frame. The reciprocating electric push rod is fixedly connected inside the protective shell.
[0010] Optionally, the upper left side of the upper surface of the upper movable frame is hinged to the lower left side of the lower surface of the primary screen frame, and the upper right side of the lower movable frame is hinged to the lower right side of the primary screen frame. An adjusting component for adjusting the tilt angle of the primary or secondary screen frame is connected to the end of the movable frame away from the hinge end. Threaded holes are provided through the upper surfaces of the front and rear frames of the movable frame at the ends away from the hinge end. The adjusting component includes two sets of threaded rods, which are threadedly connected to the interior of the two sets of threaded holes. A disc is rotatably connected to the upper end of the threaded rod, and a fixed seat is fixedly connected to the upper end of the disc. A secondary pulley is rotatably connected to both the front and rear sides of the upper end of the fixed seat. Guide rails that slide in cooperation with the secondary pulleys are fixedly connected to the right ends of the front and rear sides of the primary screen frame and the left ends of the front and rear sides of the secondary screen frame.
[0011] Optionally, a side chamber is fixedly connected to the left side of the screening box, and the screening box and the side chamber are connected. A side chamber door is hinged to the left side of the side chamber. The crushing barrel consists of a cylindrical upper barrel and a funnel-shaped lower barrel. The upper barrel is fixed to the side chamber by a support frame. An annular groove is formed on the inner side wall of the lower end of the upper barrel. A semi-circular annular through groove is formed on the left side of the annular groove, and the semi-circular annular through groove penetrates the left side wall of the upper barrel. The circular screen plate is inserted into the semi-circular annular through groove and placed inside the annular groove. The lower barrel... A straight discharge pipe is connected through the center of the end, and a discharge bend is fixedly connected to the lower end of the straight discharge pipe. The discharge end of the discharge bend is located on the upper left side of the secondary screen frame. The secondary crushing assembly also includes a barrel cover and a mixing and crushing component. The barrel cover is fixed to the upper opening of the crushing barrel by bolts. A discharge port is opened through the right side of the upper surface of the barrel cover. A discharge cylinder is fixedly connected inside the discharge port. A funnel-shaped receiving hopper is fixedly connected to the upper end of the discharge cylinder. The upper opening of the receiving hopper is located on the lower left side of the primary screen frame.
[0012] Optionally, the mixing and crushing component includes a motor, which is fixedly connected to the upper surface of the bucket lid. The output shaft of the motor passes through the bottom wall of the bucket lid and is fixedly connected to a central shaft. Multiple sets of crushing blades are fixedly mounted on the outer side of the central shaft.
[0013] Optionally, a feeding cylinder is fixedly connected inside the discharge port two, and a funnel-shaped receiving hopper is fixedly connected to the upper end of the feeding cylinder two. The upper opening of the receiving hopper two is located below the right side of the secondary screen frame.
[0014] Optionally, a set of guide plates is fixedly connected to the inner right side wall of the screening box. The guide plates are arranged in a leftward tilt and are located directly above the receiving hopper.
[0015] All of the above optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the structure after each combination.
[0016] The beneficial effects of this utility model through the above solution are as follows:
[0017] 1. This utility model effectively optimizes the processing of foundry sand by setting up a primary crushing component, a primary screen plate, a secondary crushing component, and a secondary screen plate, and adopting a graded crushing and screening method. By crushing and screening the material multiple times, not only can the crushing effect be greatly improved, but also foundry sand of different particle sizes can be accurately screened according to different particle size requirements.
[0018] 2. This utility model, by setting up a primary screen frame and a secondary screen frame that can reciprocate left and right and installing them at an angle, allows larger particles to slide off automatically under gravity and the movement of the screen frames, eliminating the need for manual intervention. This reduces the time that materials remain on the screen plate, thus preventing material accumulation and screen plate blockage. Furthermore, the secondary crushing component is installed at the discharge port of the primary screen frame, smoothly receiving large particles and further crushing them without requiring operators to re-feed them into the primary crushing component for re-crushing. This not only reduces the labor intensity of operators but also improves production efficiency.
[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0020] Figure 1 A schematic diagram of the overall appearance structure of the casting sand screening device for casting provided by this utility model;
[0021] Figure 2 A front sectional view of the casting sand screening device for casting provided by this utility model;
[0022] Figure 3 A schematic diagram of the internal structure of the casting sand screening device for casting provided by this utility model;
[0023] Figure 4 An exploded structural diagram of the casting sand screening device for casting provided by this utility model;
[0024] Figure 5 This is a schematic diagram of the structure of the slide rail, movable frame, secondary screen frame, driving component, adjusting component, feeding cylinder II and receiving hopper II in this utility model;
[0025] Figure 6 for Figure 5 A schematic diagram of the decomposed structure;
[0026] Figure 7 for Figure 6 Enlarged structural diagram at point A;
[0027] Figure 8 This is an exploded structural diagram of the secondary crushing component in this utility model;
[0028] Figure 9 This is a front sectional view of the crushing barrel in this utility model.
[0029] Numbered in the diagram: 1. Screening box; 11. Feed inlet; 12. Slide rail; 13. Outlet 1; 131. Protective plate; 14. Outlet 2; 15. Guide plate; 16. Main door; 2. Primary crushing assembly; 3. Side box; 31. Side door; 4. Movable frame; 41. Threaded hole; 42. Main pulley; 5. Primary screen frame; 51. Primary screen plate; 6. Secondary screen frame; 61. Secondary screen plate; 611. Ear plate; 612. Handle; 62. Support rod; 63. Guide rod; 64. Slot; 65. Feed hopper 1; 7. Drive unit; 71. Reciprocating electric push rod; 72. Fixing seat; 73. Protective shell 8. Body; 9. Adjusting component; 10. Threaded long rod; 11. Disc; 12. Fixed seat; 13. Secondary pulley; 14. Guide rail; 15. Secondary crushing assembly; 16. Crushing barrel; 17. Upper barrel body; 18. Annular groove; 19. Semi-circular through groove; 10. Lower barrel body; 11. Feeding straight pipe; 11. Support frame; 12. Barrel lid; 13. Feeding port; 14. Feeding cylinder one; 15. Receiving hopper one; 16. Mixing and crushing component; 17. Motor; 18. Central shaft; 19. Crushing blades; 10. Circular screen plate; 11. Feeding bend; 12. Feeding cylinder two; 13. Receiving hopper two. Detailed Implementation
[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0031] Please see Figure 1-9This utility model provides a casting sand screening device, including a screening box 1 and two sets of vertically distributed movable frames 4. A primary crushing component 2 is fixedly connected to the upper end of the screening box 1. An inlet 11, communicating with the lower outlet of the primary crushing component 2, is opened through the right side of the upper surface of the screening box 1. The two sets of movable frames 4 are slidably connected horizontally inside the screening box 1, one above the other. A primary screen frame 5 with a left-side opening and tilted to the left is connected to the upper side of the upper movable frame 4. A primary screen plate 51 is detachably connected to the inner bottom surface of the primary screen frame 5. A secondary screen frame 6 with a right-side opening and tilted to the right is connected to the upper side of the lower movable frame 4. A secondary screen plate 61 is detachably connected to the inner bottom surface of the secondary screen frame 6. The diameter of the screen holes in the primary screen plate 51 is greater than [missing information]. The screen hole diameter of the secondary screen plate 61 is such that a drive component 7 is connected to one side of the movable frame 4 to drive the movable frame 4 to move laterally back and forth. A secondary crushing component 9 is connected to the left side of the screening box 1 and located between the primary screen frame 5 and the secondary screen frame 6. The secondary crushing component 9 includes a crushing barrel 91 and a circular screen plate 96 that is detachably connected to the bottom of the crushing barrel 91. The feed end of the crushing barrel 91 is located on the lower left side of the primary screen frame 5, and the discharge end of the crushing barrel 91 is located on the upper left side of the secondary screen frame 6. The screen hole diameter of the circular screen plate 96 is the same as that of the primary screen plate 51. The lower surface of the screening box 1 is provided with a discharge port 13 for receiving the material under the screen of the secondary screen plate 61 and a discharge port 24 for receiving the material left on the upper surface of the secondary screen plate 61.
[0032] This invention, by setting up a primary crushing component 2, a primary screen plate 51, a secondary crushing component 9, and a secondary screen plate 61, employs a graded crushing and screening method to ensure that foundry sand achieves the required particle size after multiple processing steps. Specifically: the material first undergoes preliminary crushing through the primary crushing component 2, resulting in particles of varying sizes. Next, the material falls from the feed inlet 11 onto the primary screen plate 51 for coarse screening. During coarse screening, particles conforming to the diameter of the primary screen plate 51's mesh fall directly onto the secondary screen plate 61 for fine screening, while particles not conforming to the diameter fall onto the secondary crushing component 9 for secondary crushing. After secondary crushing, the material in the crushing barrel 91 is screened through the circular screen plate 96 and finally falls onto the secondary screen plate 61 for fine screening. During the fine screening process, material particles that meet the diameter of the screen openings on the secondary screen plate 61 will pass through the screen openings and fall from the discharge port 13, while material particles that do not meet the diameter of the screen openings on the secondary screen plate 61 will remain on the secondary screen plate 61 and eventually fall from the discharge port 24. By crushing and screening the material multiple times, the crushing effect is greatly improved, and different particle sizes of foundry sand can be screened out according to different particle size requirements.
[0033] In this invention, both the primary screen frame 5 and the secondary screen frame 6 can reciprocate left and right under the drive of the drive component 7, allowing the screen frame and screen plate to shake rapidly, thereby accelerating the screening speed and efficiency. Furthermore, both the primary screen frame 5 and the secondary screen frame 6 are inclined, which means that large particles screened on the primary screen plate 51 and the secondary screen plate 61, under the influence of the inclination angle, will slide off to the open side by gravity and the reciprocating motion of the screen frame. This not only effectively prevents large particles from accumulating on the screen plate but also significantly reduces the probability of screen plate clogging, ensuring a continuously efficient screening process. Simultaneously, any material remaining on the screen plate can automatically slide off without manual intervention. In addition, the secondary crushing component 9 is installed at the discharge port of the primary screen frame 5. Under the drive of the drive component 7, large particles screened on the primary screen plate 51 can smoothly slide into the secondary crushing component 9, eliminating the need for operators to re-feed the large particles into the primary crushing component 2 for re-crushing.
[0034] Specifically, the diameter of the sieve openings in the primary sieve plate 51 is larger than that in the secondary sieve plate 61, while the diameter of the sieve openings in the circular sieve plate 96 is the same as that in the primary sieve plate 51. This means that the material particles screened out by the primary sieve plate 51 and the circular sieve plate 96 are of the same size, i.e., the material particles falling onto the secondary sieve plate 61 are of the same size. The secondary sieve plate 61 then further sieves the material, retaining larger particles on it while allowing smaller particles to continue passing through the sieve openings, thus further separating and screening materials of different particle sizes.
[0035] Furthermore, protective plates 131 are fixedly connected to the upper perimeter of the discharge port 13.
[0036] Specifically, four sets of protective plates 131 form a protective space, creating a material receiving area that effectively receives the material particles screened by the secondary screen plate 61. Because the secondary screen plate 61 vibrates under the drive of the drive unit 7, material particles may scatter into the surrounding environment during this vibration. The protective plates 131 effectively prevent this scattering, ensuring that the screened material is collected in the discharge port area 13, thus avoiding material scattering.
[0037] Furthermore, the primary crushing component 2 adopts a hammer crusher.
[0038] Specifically, a hammer crusher can effectively break up large, agglomerated foundry sand particles by impacting the material with high-speed rotating hammers.
[0039] Furthermore, a main door 16 is hinged to the front of the screening box 1. Multiple sets of support rods 62 for supporting the secondary screen plate 61 are fixedly connected to the lower end of the interior of the secondary screen frame 6. Guide rods 63 for slowing down the material flow are fixedly connected to the front and rear walls of the interior of the secondary screen frame 6. Slots 64 for inserting the secondary screen plate 61 are opened through the front and rear walls of the secondary screen frame 6. The secondary screen plate 61 is located between the support rods 62 and the guide rods 63. A funnel-shaped feed hopper 65 is fixedly connected to the lower end of the secondary screen frame 6. An ear plate 611 is fixedly connected to the front of the secondary screen plate 61. The ear plate 611 is fixed to the secondary screen frame 6 by bolts. A handle 612 is fixedly connected to the middle position of the front of the secondary screen plate 61. The specific structure of the primary screen frame 5 is the same as that of the secondary screen frame 6, and the specific structure of the primary screen plate 51 is the same as that of the secondary screen plate 61.
[0040] Specifically, the screen plate and screen frame adopt a detachable structure, allowing operators to easily replace screen plates of different particle sizes according to actual needs. When it is necessary to replace the screen plate, the main box door 16 can be opened first, and then the bolts used to fix the ear plate 611 and the screen frame can be removed. Then, the screen plate can be pulled out from the slot 64 through the handle 612. The whole replacement process is simple and quick. Secondly, the guide rod 63 is set on the upper surface of the screen plate. Since the screen plate is inclined, the addition of the inclined guide rod 63 can effectively slow down the downward speed of the material particles, ensuring that the material has sufficient time to be screened on the screen plate. In addition, the funnel-shaped discharge hopper 65 can effectively gather and collect the material screened by the screen plate, avoiding large-scale material scattering.
[0041] Furthermore, two sets of symmetrically arranged slide rails 12 are fixedly installed on the upper and lower sides of the screening box 1. The front and rear sides of the movable frame 4 are rotatably connected to the main pulleys 42. The main pulleys 42 are slidably connected inside the slide rails 12 at the corresponding positions. The driving component 7 includes a reciprocating electric push rod 71, a fixing seat 72, and a protective shell 73 fixed on the outer wall of the screening box 1. The fixing seat 72 is fixedly connected to the telescopic end of the reciprocating electric push rod 71. The side of the fixing seat 72 away from the reciprocating electric push rod 71 is fixedly connected to the movable frame 4. The reciprocating electric push rod 71 is fixedly connected inside the protective shell 73.
[0042] Specifically, during the screening process, the telescopic end of the reciprocating electric push rod 71 drives the movable frame 4 to move back and forth along the slide rail 12 via the fixed buckle 72, thereby indirectly achieving the effect of shaking the screen plate and pushing the screen plate to perform efficient screening operations. During the movement of the movable frame 4, the movable frame 4 drives the main pulley 42 to slide inside the slide rail 12, making the movement of the movable frame 4 more stable and smooth. Moreover, the slide rail 12 provides a guiding function for the movable frame 4, enabling the movable frame 4 to maintain the correct trajectory during operation.
[0043] Furthermore, the upper left side of the upper surface of the upper movable frame 4 is hinged to the lower left side of the lower surface of the primary screen frame 5, and the upper right side of the lower movable frame 4 is hinged to the lower right side of the lower surface of the primary screen frame 5. An adjusting component 8 for adjusting the tilt angle of the primary screen frame 5 or the secondary screen frame 6 is connected to one end of the movable frame 4 away from the hinge end. Threaded holes 41 are provided through the upper surfaces of the front and rear frames of the movable frame 4 at the ends away from the hinge end. The adjusting component 8 includes two sets of threaded rods 81. A rotating handle is fixedly connected to the lower end of the two sets of threaded rods 81. The two sets of threaded rods 81 are respectively threaded into the interior of the two sets of threaded holes 41. A disc 82 is rotatably connected to the upper end of the threaded rods 81. A fixed seat 83 is fixedly connected to the upper end of the disc 82. A secondary pulley 84 is rotatably connected to both the front and rear sides of the upper end of the fixed seat 83. Guide rails 85 that cooperate with the secondary pulleys 84 are fixedly connected to the right ends of the front and rear sides of the primary screen frame 5 and the left ends of the front and rear sides of the secondary screen frame 6.
[0044] Specifically, the operator can adjust the angle between the screen frame and the movable frame 4 according to actual needs, thereby changing the inclination of the screen frame and screen plate. Secondly, the cooperation between the auxiliary pulley 84 and the guide rail 85 ensures that the auxiliary pulley 84 can only slide along the sliding direction of the guide rail 85, thus cooperating with the screen frame to complete the tilt adjustment. The specific operating steps are as follows: manually turn the rotating handle to rotate the threaded rod 81. Due to the threaded engagement between the threaded rod 81 and the threaded hole 41, the height of the disc 82 and the fixed seat 83 will change as the threaded rod 81 rotates, thereby causing the screen frame to tilt.
[0045] Furthermore, a side box 3 is fixedly connected to the left side of the screening box 1, and the screening box 1 and the side box 3 are connected. A side box door 31 is hinged to the left side of the side box 3. The crushing barrel 91 consists of a cylindrical upper barrel body 911 and a funnel-shaped lower barrel body 912. The upper barrel body 911 is fixed to the side box 3 by a support frame 92. An annular groove 9111 is opened on the inner side wall of the lower end of the upper barrel body 911. A semi-circular annular through groove 9112 is opened on the left side of the annular groove 9111, and the semi-circular annular through groove 9112 penetrates the left side wall of the upper barrel body 911. A circular screen plate 96 is inserted through the semi-circular annular through groove 9112 and placed inside the annular groove 9111. The left side of the circular screen plate 96 is fixed. The lower barrel 912 is connected to a handle. A straight discharge pipe 9121 is connected through the center of the lower end of the lower barrel 912. A discharge bend 97 is fixedly connected to the lower end of the straight discharge pipe 9121. The discharge end of the discharge bend 97 is located on the upper left side of the secondary screen frame 6. The secondary crushing component 9 also includes a barrel cover 93 and a mixing and crushing component 95. The barrel cover 93 is fixed to the upper opening of the crushing barrel 91 by bolts. A discharge port 931 is opened through the right side of the upper surface of the barrel cover 93. A discharge cylinder 94 is fixedly connected inside the discharge port 931. A funnel-shaped receiving hopper 941 is fixedly connected to the upper end of the discharge cylinder 94. The upper opening of the receiving hopper 941 is located on the lower left side of the primary screen frame 5.
[0046] Specifically, the circular screen plate 96 and the upper barrel 911 are detachable, allowing operators to replace the circular screen plate 96 with different particle sizes as needed. When replacing the circular screen plate 96, the side door 31 can be opened first, and then the circular screen plate 96 can be pulled out from the semi-circular annular groove 9112 using the handle. Secondly, during the screening process, material particles that do not conform to the diameter of the primary screen plate 51's screen holes will slide directly from the primary screen plate 51 into the receiving hopper 941, and then through the discharge cylinder 94 into the crushing barrel 91. At this time, the agitating and crushing components 95 will crush the material in the crushing barrel 91. During the crushing process, material particles that conform to the diameter of the circular screen plate 96's screen holes will fall through the screen holes into the lower barrel 912, and then through the discharge straight pipe 9121 and discharge curved pipe 97 onto the secondary screen plate 61. Meanwhile, material particles that still do not meet the diameter of the circular sieve plate 96 will remain in the upper barrel 911 and continue to be crushed until their particle size meets the requirements.
[0047] Furthermore, the mixing and crushing component 95 includes a motor 951, which is fixedly connected to the upper surface of the barrel cover 93. The output shaft of the motor 951 passes through the bottom wall of the barrel cover 93 and is fixedly connected to a central shaft 952. Multiple sets of crushing blades 953 are fixedly provided on the outer side of the central shaft 952.
[0048] Specifically, the output shaft of the motor 951 drives the central shaft 952 to rotate, which in turn drives the multiple sets of crushing blades 953 on the outside to rotate at high speed. The rotation of these crushing blades 953 causes the material particles inside the crushing barrel 91 to be continuously subjected to strong impact and friction, thereby effectively breaking down the material particles and gradually decomposing them into smaller particles.
[0049] Furthermore, a feeding cylinder 2 10 is fixedly connected inside the discharge port 2 14, and a funnel-shaped receiving hopper 2 101 is fixedly connected to the upper end of the feeding cylinder 2 10. The upper opening of the receiving hopper 2 101 is located on the lower right side of the secondary screen frame 6.
[0050] Specifically, material particles on the secondary sieve plate 61 that do not conform to the diameter of the sieve holes of the secondary sieve plate 61 will slide into the receiving hopper 2 101 and then fall out through the discharge cylinder 2 10.
[0051] Furthermore, a set of guide plates 15 are fixedly connected to the inner right side wall of the screening box 1. The guide plates 15 are set in a leftward tilt and are located directly above the receiving bucket 2 101.
[0052] Specifically, the guide plate 15 is positioned directly above the receiving hopper 2 101 and tilted to the left. This arrangement effectively guides the flow of material. When material screened by the primary screen plate 51 falls onto the secondary screen plate 61, the primary screen plate 51 is swaying left and right under the action of the drive component 7. At this time, the material screened by the primary screen plate 51 is very likely to fall directly into the receiving hopper 2 101. By setting the guide plate 15, the falling material can be guided onto the secondary screen plate 61.
[0053] It should be noted that: 1. In the above text, "sieve plate" refers to "primary sieve plate 51" or "secondary sieve plate 61", "sieve frame" refers to "primary sieve frame 5" or "secondary sieve frame 6", and "material" refers to "casting sand". 2. All electrical equipment mentioned above is electrically connected to the control terminal to ensure that all equipment can work in coordination during operation.
[0054] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A foundry molding sand screening device for use in foundries, characterized by: Including screening box (1) and two groups of upper and lower distribution of movable frame (4), the upper end of the screening box (1) is fixedly connected with a primary crushing assembly (2), the upper surface of the screening box (1) is provided with a feed inlet (11) which is communicated with the lower end of the primary crushing assembly (2) and is arranged on the right side, two groups of movable frame (4) are respectively horizontally slidably connected inside the screening box (1) upper and lower, the upper side of the movable frame (4) is connected with a left side opening and left side inclined primary sieve frame (5), the inner bottom surface of the primary sieve frame (5) is detachably connected with a primary sieve plate (51), the upper side of the movable frame (4) is connected with a right side opening and right side inclined secondary sieve frame (6), the inner bottom surface of the secondary sieve frame (6) is detachably connected with a secondary sieve plate (61), the sieve hole diameter of the primary sieve plate (51) is greater than that of the secondary sieve plate (61), one side of the movable frame (4) is connected with a driving member (7) for driving the movable frame (4) to move horizontally and reciprocally, the left side of the inside of the screening box (1) and between the primary sieve frame (5) and the secondary sieve frame (6) is connected with a secondary crushing assembly (9), the secondary crushing assembly (9) comprises a crushing barrel (91) and a circular sieve plate (96) which is detachably connected to the inner bottom of the crushing barrel (91), the feed end of the crushing barrel (91) is arranged below the left side of the primary sieve frame (5), the discharge end of the crushing barrel (91) is arranged above the left side of the secondary sieve frame (6), the sieve hole diameter of the circular sieve plate (96) is the same as that of the primary sieve plate (51), the lower surface of the screening box (1) is provided with a discharge port one (13) for receiving the materials screened by the secondary sieve plate (61) and a discharge port two (14) for receiving the materials left on the upper surface of the secondary sieve plate (61).
2. A molding molding sand screening device according to claim 1, characterized in that, The primary crushing assembly (2) is a hammer crusher.
3. A molding sand screening device for molding sand used in casting according to claim 1, characterized by, The front side of the screening box (1) is hingedly connected with a main box door (16), the inside of the secondary sieve frame (6) is fixedly connected with a plurality of support rods (62) for supporting the secondary sieve plate (61), the front and rear walls of the inside of the secondary sieve frame (6) are fixedly connected with flow guide rods (63) for slowing down the sliding of the materials, the front and rear walls of the secondary sieve frame (6) are provided with insertion grooves (64) for inserting the secondary sieve plate (61), the secondary sieve plate (61) is located between the support rods (62) and the flow guide rods (63), the lower end of the secondary sieve frame (6) is fixedly connected with a funnel-shaped discharge hopper one (65), the front side of the secondary sieve plate (61) is fixedly connected with an ear plate (611), the ear plate (611) and the secondary sieve frame (6) are fixed by bolts, the front side of the secondary sieve plate (61) is fixedly connected with a handle (612).
4. The molding sand screening device for molding according to claim 1 or 3, characterized by The inside of the screening box (1) is provided with two groups of symmetrically arranged slide rails (12) on the upper and lower sides, the front and rear sides of the movable frame (4) are rotationally connected with main pulleys (42), the main pulleys (42) are slidingly connected inside the slide rails (12) at the corresponding positions, the driving member (7) comprises a reciprocating electric push rod (71), a fixed buckle seat (72) and a protective shell (73) fixed on the outer side wall of the screening box (1), the fixed buckle seat (72) is fixedly connected to the telescopic end of the reciprocating electric push rod (71), and the side of the fixed buckle seat (72) away from the reciprocating electric push rod (71) is fixedly connected with the movable frame (4), and the reciprocating electric push rod (71) is fixedly connected inside the protective shell (73).
5. A molding sand screening device for molding sand according to claim 1, characterized in that, The upper surface of the movable frame (4) on the upper side is hingedly connected with the lower surface of the primary screen frame (5) on the left side, the upper surface of the movable frame (4) on the lower side is hingedly connected with the lower surface of the primary screen frame (5) on the right side, one end of the movable frame (4) away from the hinged end is connected with an adjusting member (8) for adjusting the inclination angle of the primary screen frame (5) or the secondary screen frame (6), and the upper surface of the front and rear frames of the movable frame (4) is provided with a threaded hole (41) penetratingly formed at one end away from the hinged end, the adjusting member (8) comprises two groups of threaded long rods (81), and the two groups of threaded long rods (81) are threadedly connected inside the two groups of threaded holes (41), respectively, the upper end of the threaded long rod (81) is rotationally connected with a disc (82), the upper end of the disc (82) is fixedly connected with a fixed seat (83), the upper end of the fixed seat (83) is rotationally connected with a secondary pulley (84) on the front and rear sides, and the right ends of the primary screen frame (5) on the front and rear sides and the left ends of the secondary screen frame (6) on the front and rear sides are fixedly connected with guide rails (85) slidingly matched with the secondary pulleys (84).
6. A molding sand screening device for molding sand according to claim 1, characterized in that, The left side of the screening box (1) is fixedly connected with a side box (3), the screening box (1) and the side box (3) are communicated, the left side of the side box (3) is hingedly connected with a side box door (31), the crushing barrel (91) is composed of a cylindrical upper barrel body (911) and a funnel-shaped lower barrel body (912), the upper barrel body (911) is fixed with the side box (3) through a support frame (92), a ring-shaped groove (9111) is formed in the inner side wall of the lower end of the upper barrel body (911), a semicircular ring through groove (9112) is formed in the left side of the ring-shaped groove (9111), the semicircular ring through groove (9112) penetrates the left side wall of the upper barrel body (911), the circular sieve plate (96) is inserted and placed in the inner side of the ring-shaped groove (9111) through the semicircular ring through groove (9112), a lower discharge straight pipe (9121) is connected at the lower end of the lower barrel body (912), a lower discharge elbow pipe (97) is fixedly connected to the lower end of the lower discharge straight pipe (9121), the discharge end of the lower discharge elbow pipe (97) is located above the left side of the secondary screen frame (6), the secondary crushing assembly (9) further comprises a barrel cover (93) and a stirring crushing piece (95), the barrel cover (93) is fixed at the upper end opening of the crushing barrel (91) through bolts, a lower discharge port (931) is formed in the upper surface of the right side of the barrel cover (93), a lower discharge cylinder I (94) is fixedly connected in the lower discharge port (931), a funnel-shaped receiving hopper I (941) is fixedly connected to the upper end of the lower discharge cylinder I (94), and the upper end opening of the receiving hopper I (941) is located below the left side of the primary screen frame (5).
7. A foundry molding sand screening device according to claim 6, characterized in that The stirring crushing piece (95) comprises a motor (951), the motor (951) is fixedly connected to the upper surface of the barrel cover (93), the output shaft of the motor (951) penetrates the bottom wall of the barrel cover (93) and is fixedly connected with a central shaft (952), a plurality of crushing blades (953) are fixedly connected to the outer side of the central shaft (952).
8. A molding sand screening device for molding sand according to claim 1, characterized in that, The lower discharge cylinder II (10) is fixedly connected in the discharge port II (14), a funnel-shaped receiving hopper II (101) is fixedly connected to the upper end of the lower discharge cylinder II (10), and the upper end opening of the receiving hopper II (101) is located below the right side of the secondary screen frame (6).
9. A foundry molding sand screening apparatus according to claim 8, characterized in that, A group of guide plates (15) are fixedly connected to the inner right side wall of the screening box (1), the guide plates (15) are arranged in a leftward inclined manner and located directly above the receiving hopper II (101).