A method of producing a concrete preform

Abstract

The application provides a concrete prefabricated part production method, concrete is delivered into a prefabricated mold through a discharging device, a lifting component channel lifts the prefabricated mold during the process of concrete input into the prefabricated mold, the side plate is opened and closed under the closing action of the second groove, the opening action of the elastic reset component and the avoiding action of the first hole, and the lower end of the prefabricated mold is located in the limiting groove when the amount of concrete input into the prefabricated mold reaches the requirement, so that the side plate is in the closed state. The application provides a concrete prefabricated part production method with high compactness at the corner of the manufactured concrete prefabricated part, improves the quality of the concrete prefabricated part, and especially improves the strength at the corner of the concrete prefabricated part.

Description

Technical Field

[0001] This application relates to the field of concrete precast equipment technology, and in particular to a method for producing precast concrete components. Background Technology

[0002] Precast concrete components are blocks made by grinding fly ash or silica sand and slag with water into a slurry, adding powdered lime, appropriate amounts of cement, gypsum, foaming agent, and foam stabilizer, and then pouring the mixture into a mold. After demolding, the precast concrete components are treated with high-pressure steam to obtain the finished product. The precast concrete component process is a process of prefabricating cement parts of buildings or structures on-site, which can save labor, overcome seasonal influences, and facilitate year-round construction. Chinese patent document CN202310495745.9, published on June 23, 2023, discloses a method for producing precast concrete components, comprising the following steps: S1: Assembling all components of the precast concrete component molding mold together and placing the mold on a vibrating roller table; S2: Placing the reinforcing steel frame inside the precast concrete component molding mold; S3: Transporting the concrete slurry from the mixer truck into the hopper of the machine frame; S4: Weighing the amount of concrete slurry in the hopper using a weighing component at the bottom; S5: Using a feeding motor and an auger to deliver a fixed amount of concrete slurry into the precast concrete component molding mold for distribution; S6: The vibrating roller table operates, and the precast concrete component molding mold filled with concrete slurry vibrates and forms the component; S7: The formed precast concrete component is transported away for curing; S8: The cured precast concrete component is demolded. Its shortcomings are that the vibration amplitude of the vibrating table is not large, and the vibration is mostly longitudinal. The efficiency of the concrete slurry flowing to the edges and corners is low, resulting in poor edge quality of the precast concrete components after molding, which is prone to loss. Since the edges of the precast concrete components are the places where they are frequently bumped during transportation and handling, poor edge quality will obviously affect the use of the precast concrete components. Summary of the Invention

[0003] This invention provides a method for producing precast concrete components with high density at the corners, thereby improving the quality of precast concrete components, especially increasing the strength at the corners.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution.

[0005] A method for producing precast concrete components, characterized by being accomplished using precast concrete equipment, the equipment comprising a conveying device, a feeding device, and a precast mold. The precast mold is mounted on the conveying device, and the feeding device is positioned above the conveying device. When the conveying device transports the precast mold to a position below the feeding device, the feeding device introduces concrete slurry into the precast mold. The precast mold includes a base plate and side plates located on the base plate. A support plate is provided on the base plate, and the edges of the side plates can fit against the support plate. The side plates are rotatably connected to the base plate. An elastic reset element is provided between the support plate and the side plates. The conveying device is equipped with a lifting component for overall lifting and vibration of the precast mold, and also with a limiting groove that cooperates with the precast mold. When the lifting component lowers the base plate, the limiting groove constrains the precast mold so that the elastic reset element is pressed and the side edges of the side plates fit against the support plate. The precast component cavity is formed by the support plate, the bottom plate, the side plate, and the support plate. The limiting groove includes a first hole and a second groove. The first hole is located above the second groove, and the second groove opens upward. The first hole is a truncated pyramid with its cone angle pointing downward, and the second groove is a cuboid. When the side plate is engaged with the first hole, it is in a state where the upper end is flipped outward. When the side plate is engaged with the second groove, it is in a vertical state perpendicular to the bottom plate. The process of producing precast concrete components is as follows: concrete is transported into the precast mold through a feeding device. During the process of concrete input into the precast mold, the lifting component drives the precast mold to rise and fall. When the precast mold rises and falls, the side plate opens and closes under the closing action of the second groove, the opening action of the elastic reset component, and the avoidance action of the first hole. After the amount of concrete input into the precast mold reaches the required level, the lower end of the precast mold is located in the limiting groove, so that the side plate is in a closed state.

[0006] The elastic reset component increases the diffusion area of ​​the concrete slurry after it is poured into the precast mold. When the bottom plate descends to the bottom of the limiting groove, the side plate is pressed to overcome the elastic force of the reset component, causing the side wall to fit against the support plate, reducing the volume at the edge, and driving the slurry from the edge to the center. This ensures sufficient slurry at the edge, improving the quality of the precast concrete component; it also increases the strength of the edge of the precast concrete slab, especially significantly improving the strength of the hanging frame; during demolding, the elastic reset component provides demolding assistance, improving demolding efficiency. When the side plate mates with the first hole, the limiting hole, under the action of the connecting rod, allows the precast mold to rotate slightly, ensuring sufficient material is fed to the corners of the precast mold, increasing the rate of concrete slurry diffusion on the bottom plate; when the side plate mates with the second groove, the precast mold only vibrates longitudinally, improving the uniformity and compactness of the slurry within the precast mold, thus improving the precast quality of the concrete component.

[0007] Preferably, the lifting component includes a lifting cylinder, a connecting rod on the piston rod of the lifting cylinder, the connecting rod being universally connected to the piston rod, and a mounting platform on the conveying device. A limiting groove is located at the upper end of the mounting platform, and a limiting hole with clearance fitting to the connecting rod is provided in the mounting platform. When the bottom plate is driven to the lowest point by the lifting cylinder, the bottom plate is in a horizontal state. In use, the lifting cylinder drives the precast mold to rise and fall. When the side plate is entirely within the first hole, the precast mold can swing, thereby making the concrete fill the precast mold more densely.

[0008] The lifting cylinder can push the base plate and also generate vibration due to reciprocating motion. Due to the clearance fit between the limiting hole and the connecting rod, and the universal connection between the connecting rod and the piston rod, the vibration of the precast mold by the lifting cylinder is not only in the longitudinal direction, but also in the horizontal direction, which improves the vibration efficiency of the precast mold and facilitates edge material placement. When the lifting cylinder pushes up to the top, the side plate can flip outward relative to the base plate to ensure demolding efficiency.

[0009] Preferably, the limiting hole includes a first frustum hole and a second frustum hole arranged coaxially, with the cone angles of the first frustum hole and the second frustum hole being opposite to each other. This achieves reliable limiting of the connecting rod.

[0010] Preferably, the base plate has a rectangular cross-sectional shape, and the support plate is located on the diagonal of the base plate's cross-section. The support plate is fixedly installed to the base plate, and the support plate has chamfered surfaces corresponding to the corners of the base plate's cross-section. The chamfered surfaces prevent stress concentration at the edges of the precast components, which could lead to corner damage during demolding, thus improving demolding quality and efficiency.

[0011] Preferably, the lower end of the side plate is hinged to the base plate. This allows for reliable flipping of the side plate and ensures the reliability of the connection between the base plate and the side plate.

[0012] Preferably, the conveying device includes a conveying trolley, a lifting component, and a mounting platform positioned above the conveying trolley. The placement of the conveying trolley facilitates finding alternative locations for subsequent maintenance and demolding of the precast concrete components in the precast molds, thus improving the space utilization rate of the workshop.

[0013] Preferably, the feeding device includes a hopper containing a feeding auger. The hopper has a discharge port at its lower end, a control valve inside the discharge port, and an extension hose at the lower end of the discharge port. The feeding auger delivers the slurry from the hopper into the precast mold. The control valve controls the slurry feeding time, and the extension hose controls the slurry feeding position and lower end height, allowing for easy manual adjustment of the slurry volume at various locations in the precast mold based on actual conditions. This directly improves the efficiency of concrete precasting by enhancing the uniformity of the feeding process.

[0014] Preferably, the support plate has a vertical receiving hole, and the side wall of the vertical receiving hole has a gap communicating with the cavity of the precast part. The lower end of the gap is flush with the upper surface of the base plate, and the upper end penetrates the upper end surface of the support plate. A vertical cutter shaft is rotatably connected inside the vertical receiving hole. A shaft cutter, a shaft pulley located above the support plate, and a rotating sleeve are connected to the vertical cutter shaft. A sleeve cutter and a sleeve pulley located above the support plate are connected to the rotating sleeve. The rotating sleeve has a clearance through hole to prevent the rotating sleeve from interfering with the shaft cutter rotating with the vertical cutter shaft. The cutting edges of the shaft cutter and the sleeve cutter are arranged opposite each other and located on the same cylindrical surface centered on the vertical cutter shaft. When the cutting edges of the shaft cutter and the sleeve cutter are closed, they seal the gap. When the cutting edges of the shaft cutter and the sleeve cutter are separated, the gap communicates with the vertical receiving hole and the cavity of the precast part. In the precast component cavity, all shaft gears are connected together via shaft drive belts, and all sleeve gears are connected together via sleeve drive belts. One support plate houses a shaft drive motor and a shaft gear mounted on the vertical cutter shaft. The power output shaft of the shaft drive motor has a shaft drive motor gear, which is connected to the shaft gear via a shaft drive chain. Another support plate houses a sleeve drive motor and a sleeve gear mounted on the vertical cutter shaft. The power output shaft of the sleeve drive motor has a sleeve drive motor gear, which is connected to the sleeve gear via a sleeve drive chain. When concrete is injected into the precast mold, the cutting edges of the shaft cutter and the sleeve cutter are in a separated state. Once the required amount of concrete has been poured into the precast mold, the cutting edges of the shaft cutter and the sleeve cutter are in a closed state. The opening and closing of the cutting edges of the shaft cutter and the sleeve cutter are controlled by the sleeve drive motor and the shaft drive motor. This ensures a denser finish at the corners of the precast concrete component.

[0015] Preferably, the bottom wall of the vertical receiving hole is provided with an output vertical hole; when the cutting edges of the shaft cutter and the sleeve cutter are closed, the rotating sleeve, the shaft cutter, and the sleeve cutter form a vertical channel; the bottom plate is provided with a threaded through hole, and a plug is threadedly connected to the threaded through hole. The downward projection of the vertical channel is entirely within the vertical projection of the output vertical hole, and the downward projection of the output vertical hole is entirely within the vertical projection of the threaded through hole. When the cutting edges of the shaft cutter and the sleeve cutter are closed, the plug is removed, and the concrete located in the vertical channel is squeezed downward to expel the concrete from the vertical channel, so that the mold can be reused. The present invention has the following beneficial effects in facilitating the removal of concrete from the vertical channel: improving the quality of precast concrete components, especially the strength of the edges of precast concrete components, particularly the corners; the side plates can be flipped outward relative to the bottom plate, ensuring demolding efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the concrete precast equipment in Embodiment 1 of the present invention; Figure 2 This is an internal sectional view of the conveying device in this invention; Figure 3 This is a cross-sectional schematic diagram showing the location of the limiting groove and limiting hole of the present invention; Figure 4 This is a schematic diagram of the structure when the prefabricated mold and the second groove are combined in this invention; Figure 5 This is a top view schematic diagram of the structure when the prefabricated mold and the first groove body are engaged in the present invention; Figure 6 This is an internal sectional view of the feeding device in this invention; Figure 7 This is a top view schematic diagram of the prefabricated mold in Embodiment 2 of the present invention; Figure 8 for Figure 7 A magnified view of a portion of point A; Figure 9 for Figure 7 A magnified view of a portion of point B; Figure 10 for Figure 7 A magnified view of a portion at point C; Figure 11 for Figure 7 D-D sectional view. In the figure: conveyor trolley 10, roller 101, mounting platform 102, limiting groove 11, first hole 111, second groove 112, lifting cylinder 12, connecting rod 13, limiting hole 14, first frustum hole 141, second frustum hole 142, precast mold 2, base plate 21, side plate 22, support plate 23, chamfered surface 231, elastic reset component 24, hopper 31, feeding auger 32, conveying pipe 33. 34. Control valve, 35. Extension hose, 36. Bracket, 37. Feeding motor, 38. Precast cavity, 41. Vertical receiving hole, 42. Gap, 43. Vertical cutter shaft, 44. Shaft cutter, 45. Shaft pulley, 46. Rotating sleeve, 47. Sleeve cutter, 48. Sleeve pulley, 49. Clearance through hole, 50. Shaft drive belt, 51. Sleeve drive belt, 52. Shaft drive motor, 53. Shaft drive motor gear, 54. Shaft drive chain, 55. Sleeve drive motor, 56. Sleeve gear, 57. Sleeve drive motor gear, 58. Sleeve drive chain, 59. Output vertical hole, 60. Vertical channel, 61. Plug, 62. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1, see Figures 1 to 6A method for producing precast concrete components is disclosed, which utilizes advanced precast concrete production equipment. The equipment includes a conveying device, a feeding device, and a precast mold 2. The precast mold 2 is mounted on the conveying device, and the feeding device is positioned above it. When the conveying device transports the precast mold 2 to a position below the feeding device, the feeding device introduces concrete slurry into the precast mold 2. Figure 6 The feeding device includes a hopper 31, within which a feeding auger 32 is installed. The lower end of the hopper 31 has a discharge port and a conveying pipe 33. The feeding auger 32 extends into the conveying pipe 33 and is fitted with the inner diameter of the pipe to ensure reliable feeding. The discharge port is located at the lower end of the conveying pipe 33 and contains a control valve 34. An extension hose 35 is located at the lower end of the discharge port. An opening at the top of the hopper 31 is provided for feeding concrete slurry. A bracket 36 is fixedly mounted on the upper surface of the hopper 31, and a feeding motor 37 that drives the feeding auger 32 to rotate is mounted on the bracket 36. A base plate, side plates, and a support plate enclose the precast component cavity 38.

[0019] like Figure 4 and Figure 5 As shown, the precast mold 2 includes a base plate 21 and a side plate 22 located on the base plate 21. A support plate 23 is provided on the base plate 21. The cross-sectional shape of the base plate 21 is rectangular. The support plate 23 is located on the diagonal of the cross-section of the base plate 21 and is fixedly installed with the base plate 21. The support plate 23 has a chamfered surface 231 corresponding to the corner of the cross-section of the base plate 21. The edge of the side plate 22 can fit against the support plate 23. The side plate 22 is rotatably connected to the base plate 21, and the lower end of the side plate 22 is hinged to the base plate 21. An elastic reset member 24 is provided between the support plate 23 and the side plate 22. The elastic reset member 24 is a spring sheet. In order to ensure the compression of the elastic reset member 24 to achieve the fit between the edge of the side plate 22 and the support plate 23, a groove is provided on the edge of the side plate 22 or the support plate 23 to position the spring sheet and to achieve the hidden setting of the spring sheet. The spring sheet has a thin sheet structure and is not easy to jam.

[0020] like Figure 2 and Figure 3As shown, the conveying device is equipped with a lifting component and a vibration component for the overall lifting and vibration of the precast mold 2. The conveying device is also equipped with a limiting groove 11 that cooperates with the precast mold 2. When the lifting component drives the bottom plate 21 to descend, the limiting groove 11 constrains the precast mold 2 so that the elastic reset component 24 is pressed and the side edge of the side plate 22 is attached to the support plate 23. The specific structure is as follows: the limiting groove 11 includes a first hole 111 and a second groove 112. The first hole 111 is located above the second groove 112, and the second groove 112 opens upward. The first hole 111 is a truncated pyramid with the cone angle pointing downward, and the second groove 112 is a cuboid. When the side plate 22 cooperates with the first hole 111, it is in a state where the upper end is flipped outward. When the side plate 22 cooperates with the second groove 112, it is in a vertical state perpendicular to the bottom plate 21.

[0021] The lifting component includes a lifting cylinder 12. A connecting rod 13 is mounted on the piston rod of the lifting cylinder 12. The connecting rod 13 and the piston rod are universally connected via a universal joint coupling or a ball joint. The axis of the lifting cylinder 12 is vertically aligned. The conveying device has a mounting platform. A limiting groove 11 is located at the upper end of the mounting platform. The mounting platform has a limiting hole 14 that is clearance-fitted with the connecting rod 13. The limiting hole 14 includes a first frustum hole 141 and a second frustum hole 142 coaxially arranged. The cone angles of the first frustum hole 141 and the second frustum hole 142 are opposite to each other, with the first frustum hole 141 located above the second frustum hole 142.

[0022] When the base plate 21 is driven to the lowest point by the lifting cylinder 12, the base plate 21 is in a horizontal state due to the support of the bottom of the limiting groove 11. During the process of driving the precast mold 2 to move up and down, the lifting component, guided by the first hole 111 and the second groove 112, simultaneously realizes the function of the vibration component, achieving power integration of the lifting component and the vibration component.

[0023] The conveying device includes a conveying trolley 10, with lifting components and a mounting platform positioned above the conveying trolley 10. Rollers 101 are located below the conveying trolley 10, enabling it to be moved to the appropriate position in the workshop for subsequent prefabrication maintenance or demolding.

[0024] In this application, concrete slurry is injected into the hopper 31; the base plate 21 and the connecting rod 13 are assembled as an integral structure, and the side plate 22 is hinged to the base plate 21. When the lifting component drives the precast mold 2 to be above the workbench, the upper end of the side plate 22 flips outward to a horizontal state. The lifting component drives the precast mold 2 to move downward. When the side plate 22 is engaged with the first hole 111, the upper end of the side plate 22 flips upward toward the base plate 21, and the connection of the spring piece between the side plate 22 and the support plate 23 is completed at an appropriate position. One end of the spring piece is fixed to the support plate 23, and the other end of the spring piece is inserted into the side plate 22, which is intended to provide outward elastic force to the side plate 22 so that the side plate 22 can reliably engage with the wall of the first hole 111. At this point, the lifting component can be operated to move up and down repeatedly. The side plate 22 and the first hole 111 are engaged to achieve rapid diffusion of concrete slurry on the base plate 21. After a certain frequency and time, the concrete slurry is fully distributed on the base plate 21 and reaches the required weight. The weight can be controlled by setting a pressure sensor between the base plate 21 and the connecting rod 13 or by counting the amount of material discharged from the hopper 31. The lifting component drives the precast mold 2 to continue moving downward, so that the side plate 22 engages with the second trough 112. The lifting component moves up and down repeatedly, so that the precast mold 2 moves up and down within the second trough 112. Since the second trough 112 limits the side plate 22, the side plate 22 always remains perpendicular to the base plate 21, thereby compacting the concrete slurry while ensuring the volume of the concrete molding. After that, the conveying trolley 10 can be pushed to other workstations to complete maintenance and demolding. During demolding, the drive lifting assembly makes the lower end of the side plate 22 higher than the upper end of the limiting groove 11, so that the side plate 22 can be completely flipped outward to the horizontal position of the base plate 21, which facilitates the radial demolding.

[0025] The elastic reset member 24 and the first hole 111 of this application increase the diffusion volume of the concrete slurry after it is poured into the precast cavity of the precast mold 2. When the bottom plate 21 descends to the bottom of the limiting groove 11 and engages with the second groove 112, the side plate 22 is pressed to overcome the elastic force of the elastic reset member 24, causing the side wall to fit against the support plate 23, reducing the volume of the inner cavity of the precast mold 2, driving the slurry from the edge to the center, thereby ensuring the amount of slurry at the edge, improving the strength and quality of the edge of the precast concrete slab, improving the quality of the precast concrete component; and the elastic reset member 24 provides demolding assistance during demolding, which can improve demolding efficiency.

[0026] Example 2 differs from Example 1 in that: See Figures 7 to 11The support plate has a vertical receiving hole 41, and a gap 42 connecting the precast cavity is provided on the side wall of the vertical receiving hole. The lower end of the gap is flush with the upper surface of the base plate, and the upper end penetrates the upper end surface of the support plate. A vertical cutter shaft 43 is rotatably connected inside the vertical receiving hole. A shaft cutter 44, a shaft pulley 45 located above the support plate, and a rotating sleeve 46 are connected to the vertical cutter shaft. A sleeve cutter 47 and a sleeve pulley 48 located above the support plate are connected to the rotating sleeve. The rotating sleeve has a clearance through hole 49 to prevent the rotating sleeve from interfering with the shaft cutter rotating with the vertical cutter shaft. The cutting edges of the shaft cutter and the sleeve cutter are arranged opposite each other and located on the same cylindrical surface centered on the vertical cutter shaft. When the cutting edges of the shaft cutter and the sleeve cutter are closed, the gap is sealed. When the cutting edges of the shaft cutter and the sleeve cutter are separated, the gap connects the vertical receiving hole and the precast cavity. The shaft gears are connected together via a shaft drive belt 50, and all the sleeve gears are connected together via a sleeve drive belt 51. One support plate has a shaft drive motor 52 and a shaft gear 53 mounted on the vertical cutter shaft. A shaft drive motor gear 54 is mounted on the power output shaft of the shaft drive motor, and the shaft drive motor gear is connected to the shaft gear via a shaft drive chain 55. Another support plate has a sleeve drive motor 56 and a sleeve gear 57 mounted on the vertical cutter shaft. A sleeve drive motor gear 58 is mounted on the power output shaft of the sleeve drive motor, and the sleeve drive motor gear is connected to the sleeve gear via a sleeve drive chain 59. When concrete is injected into the precast mold, the cutting edges of the shaft cutter and the sleeve cutter are in a separated state. After the required amount of concrete is injected into the precast mold, the cutting edges of the shaft cutter and the sleeve cutter are in a closed state. The opening and closing of the cutting edges of the shaft cutter and the sleeve cutter are accomplished by the sleeve drive motor and the shaft drive motor. The bottom wall of the vertical receiving hole has an output vertical hole 60. When the cutting edges of the shaft cutter and the sleeve cutter are closed, the rotating sleeve, shaft cutter, and sleeve cutter form a vertical channel 61. The base plate has a threaded through hole, and a plug 62 is threadedly connected to the threaded through hole. The downward projection of the vertical channel is entirely within the vertical projection of the output vertical hole, and the downward projection of the output vertical hole block is entirely within the vertical projection of the threaded through hole. After the cutting edges of the shaft cutter and the sleeve cutter are closed, the plug is removed, and the concrete located in the vertical channel is squeezed downward to expel the concrete from the vertical channel so that the mold can be reused.

Claims

1. A method for producing precast concrete components, characterized in that, This process is accomplished using precast concrete equipment, which includes a conveying device, a feeding device, and a precast mold. The precast mold is mounted on the conveying device, and the feeding device is located above the conveying device. When the conveying device transports the precast mold to the area below the feeding device, the feeding device introduces concrete slurry into the precast mold. The precast mold includes a base plate and side plates located on the base plate. A support plate is provided on the base plate, and the edges of the side plates can fit against the support plate. The side plates are rotatably connected to the base plate, and an elastic reset element is provided between the support plate and the side plates. The conveying device is equipped with a lifting component for overall lifting and vibration of the precast mold, and also has a limiting groove that cooperates with the precast mold. When the lifting component lowers the base plate, the limiting groove constrains the precast mold so that the elastic reset element is pressed and the side edges of the side plates fit against the support plate. The precast component cavity is enclosed by side plates and support plates. The limiting groove includes a first hole and a second groove. The first hole is located above the second groove, and the second groove opens upward. The first hole is a truncated pyramid with its cone angle pointing downward, and the second groove is a cuboid. When the side plate is engaged with the first hole, it is in a state where the upper end is flipped outward. When the side plate is engaged with the second groove, it is in a vertical state perpendicular to the bottom plate. The process of producing precast concrete components is as follows: concrete is transported into the precast mold through a feeding device. During the process of concrete input into the precast mold, the lifting component drives the precast mold to rise and fall. When the precast mold rises and falls, the side plate opens and closes under the closing action of the second groove, the opening action of the elastic reset component, and the avoidance action of the first hole. After the amount of concrete input into the precast mold reaches the required level, the lower end of the precast mold is located in the limiting groove, so that the side plate is in a closed state.

2. The method for producing precast concrete components according to claim 1, characterized in that, The lifting component includes a lifting cylinder, a connecting rod on the piston rod of the lifting cylinder, and a universal joint between the connecting rod and the piston rod. The conveying device is equipped with a mounting platform, a limiting groove is located at the upper end of the mounting platform, and a limiting hole that fits the connecting rod with a clearance fit is provided in the mounting platform. When the bottom plate is driven to the lowest point by the lifting cylinder, the bottom plate is in a horizontal state. In use, the lifting cylinder drives the precast mold to rise and fall. When the side plate is entirely located in the first hole, the precast mold can swing, thereby making the concrete fill the precast mold more densely.

3. The method for producing precast concrete components according to claim 2, characterized in that, The limiting hole includes a first frustum hole and a second frustum hole arranged coaxially, with the cone angles of the first frustum hole and the second frustum hole being arranged opposite each other.

4. A method for producing precast concrete components according to claim 1, 2, or 3, characterized in that, The base plate has a rectangular cross-sectional shape, and the support plate is located on the diagonal of the base plate's cross-section. The support plate is fixedly installed with the base plate, and the support plate has a chamfered surface corresponding to the corner of the base plate's cross-section.

5. A method for producing precast concrete components according to claim 4, characterized in that, The lower end of the side plate is hinged to the bottom plate.

6. A method for producing precast concrete components according to claim 3, characterized in that, The conveying device includes a conveying trolley, a lifting component, and a mounting platform positioned above the conveying trolley.

7. A method for producing precast concrete components according to claim 1, 2, 3, or 6, characterized in that, The feeding device includes a hopper, a feeding auger inside the hopper, a discharge port at the lower end of the hopper, and an extension hose at the lower end of the discharge port.

8. A method for producing precast concrete components according to claim 1, 2, or 3, characterized in that, The support plate has a vertical receiving hole, and the side wall of the vertical receiving hole has a gap connecting the preform cavity. The lower end of the gap is flush with the upper surface of the base plate, and the upper end penetrates the upper surface of the support plate. A vertical cutter shaft is rotatably connected inside the vertical receiving hole. A shaft cutter, a shaft pulley located above the support plate, and a rotating sleeve are connected to the vertical cutter shaft. A sleeve cutter and a sleeve pulley located above the support plate are connected to the rotating sleeve. The rotating sleeve has a clearance through hole to prevent the rotating sleeve from interfering with the shaft cutter's rotation along with the vertical cutter shaft. The cutting edges of the shaft cutter and the sleeve cutter are arranged opposite each other and located on the same cylindrical surface centered on the vertical cutter shaft. When the cutting edges of the shaft cutter and the sleeve cutter are closed, they seal the gap. When the cutting edges of the shaft cutter and the sleeve cutter are separated, the gap connects the vertical receiving hole and the preform cavity. All shaft gears are connected by shaft drive belts. All the sleeve gears are connected together via a sleeve drive belt; one support plate has a shaft drive motor and a shaft gear mounted on the vertical cutter shaft, and the shaft drive motor gear is mounted on the power output shaft of the shaft drive motor, which is connected to the shaft gear via a shaft drive chain; another support plate has a sleeve drive motor and a sleeve gear mounted on the vertical cutter shaft, and the sleeve drive motor gear is mounted on the power output shaft of the sleeve drive motor, which is connected to the sleeve gear via a sleeve drive chain; when concrete is injected into the precast mold, the cutting edges of the shaft cutter and the sleeve cutter are in a separated state; after the amount of concrete input into the precast mold reaches the required level, the cutting edges of the shaft cutter and the sleeve cutter are in a closed state; the opening and closing of the cutting edges of the shaft cutter and the sleeve cutter are accomplished by the sleeve drive motor and the shaft drive motor.

9. A method for producing precast concrete components according to claim 8, characterized in that, The bottom wall of the vertical receiving hole is provided with an output vertical hole; when the cutting edges of the shaft cutter and the sleeve cutter are closed, the rotating sleeve, the shaft cutter, and the sleeve cutter form a vertical channel; the bottom plate is provided with a threaded through hole, and a plug is threadedly connected to the threaded through hole; the downward projection of the vertical channel is entirely within the vertical projection of the output vertical hole, and the downward projection of the output vertical hole is entirely within the vertical projection of the threaded through hole; when the cutting edges of the shaft cutter and the sleeve cutter are closed, the plug is removed, and the concrete located in the vertical channel is squeezed downward to squeeze out the concrete located in the vertical channel.

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