An iron mold sand coating production line

Abstract

The present invention discloses an iron mold sand covering production line, comprising a molding section, a core lowering section, a box assembly section, a pouring section, a box opening and dropping section, a sand cleaning section, and a mold cleaning section which are arranged in a ring and connected in sequence by conveyor rollers, and each section is connected by a conveyor roller, wherein the molding section comprises a molding station one and a molding station three for sand covering a first type of sand box, and a molding station two and a molding station four for sand covering a second type of sand box, and a bidirectional roller is provided between molding station one and molding station three, and between molding station two and molding station four; the iron mold sand covering production line proposed in the present invention has a first box transfer machine which conveys the sand box after sand cleaning to the molding section, and the provision of multiple molding stations improves the sand covering efficiency of the sand box, and at the same time, sand coverings of different shapes can be produced on the same production line, saving investment in equipment costs, realizing the recycling of the sand box, and greatly improving production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of iron mold sand coating production, and in particular to an iron mold sand coating production line. Background Art

[0002] The iron mold sand coating process involves depositing a 4-10mm thick layer of coated sand between the metal mold and the inner wall of the roughly formed metal casting mold (sand box). The coated sand forms a hard shell mold. Molten iron is then injected into the sand-coated metal flask, where it solidifies to form the casting. Because the iron mold sand coating provides sufficient strength and rigidity, and the high hardness of the sand coating prevents defects such as bulging and shrinkage cavities in the casting. Ductile iron utilizes the graphitization expansion of the solidified molten iron, eliminating defects such as shrinkage and shrinkage cavities. This allows for a riser-free process, significantly improving the product yield rate to over 76%.

[0003] By adjusting the thickness of the sand coating on the iron mold, the casting can be solidified simultaneously. When sand coating iron molds, the sand coating is about 7mm when the workpiece has an average thickness. When the workpiece is significantly thinner than the average thickness, the sand coating is thickened to a maximum of 8-10mm. When the workpiece is significantly thicker than the average thickness, the sand coating is reduced to a minimum of 4mm. By utilizing the chilling effect of the iron mold, the workpiece can be solidified simultaneously to the maximum extent possible, cooling rapidly, thereby obtaining a good matrix structure and ensuring stable mechanical properties.

[0004] The iron mold sand coating process produces castings with high strength and elongation, eliminating the need for heat treatment and the addition of precious metals such as Ni and Mo during production, thus reducing product costs. This process can meet the requirements of automotive ductile iron castings, which have high safety and comprehensive mechanical performance requirements, and achieve lightweight, low-energy, and low-cost automotive production.

[0005] The previous iron mold sand casting production line can only produce one product. When another product needs to be produced, the original sand box and mold need to be replaced before production can begin, which results in low production efficiency. Summary of the Invention

[0006] In order to solve the technical problems existing in the background technology, the present invention proposes an iron mold sand coating production line.

[0007] The present invention proposes an iron mold sand coating production line, including a molding section, a core lowering section, a box assembly section, a pouring section, a box opening and dropping section, a sand cleaning section, and a mold cleaning section, which are arranged in a ring and connected in sequence by conveyor rollers. The molding section includes molding station one and molding station three for sand coating a first type of sand box, and molding station two and molding station four for sand coating a second type of sand box. A bidirectional roller is provided between molding station one and molding station three, and between molding station two and molding station four. A first box transfer machine for transporting the first type of sand box or the second type of sand box to the bidirectional roller is provided between the mold cleaning section and the molding section. A second box transfer machine for transporting the first type of sand box or the second type of sand box to the core lowering section is provided between molding station one and molding station two. A shuttle bus for transporting the first type of sand box or the second type of sand box to the second box transfer machine is provided between molding station three and molding station four.

[0008] Preferably, an industrial camera 1 for identifying the first type of sand box and the second type of sand box is further provided between the mold clearing section and the molding section.

[0009] Preferably, molding station one, molding station two, molding station three, and molding station four all have molding machines, which include a movable sand-shooting head, a mold opening and closing mechanism, a sand-shooting mechanism, and a sand-adding mechanism. A bidirectional roller conveys the sand box to the molding machine to complete the movement of the sand-shooting head, mold closing, compaction, sand-shooting, and solidification of the mold.

[0010] Preferably, an industrial camera 2 for identifying the first type of flask and the second type of flask is further provided between the assembling section and the pouring section.

[0011] Preferably, the pouring section includes a first pouring channel and a second pouring channel, and the feed ends of the first pouring channel and the second pouring channel are respectively arranged with spare roller one and spare roller two, and a third box transfer machine for transferring the first type of sand box to spare roller one and the second type of sand box to spare roller two is provided between the lower core section and the pouring section.

[0012] Preferably, a bidirectional pouring machine is provided between the first pouring channel and the second pouring channel for pouring into the first type flask and the second type flask, and the bidirectional pouring machine includes a traveling body, a ladle frame, a left and right moving mechanism and a lifting mechanism.

[0013] Preferably, the lower core section includes a box turner for realizing the flipping of the first type sand box and the second type sand box, and the second box moving machine can move between the box turner and the top hole machine to transport the defective products after the box turner inspection to the sand cleaning section.

[0014] The iron mold sand covering production line proposed in the present invention has a first box transfer machine that transports the sand box after sand cleaning to the molding section. The setting of multiple molding stations improves the sand covering efficiency of the sand box. At the same time, sand coverings of different shapes can be produced on the same production line, saving equipment cost investment, realizing the recycling of sand boxes, and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the process of an iron mold sand coating production line proposed by the present invention;

[0016] Figure 2 This is a structural diagram of a molding machine for an iron mold sand coating production line proposed by the present invention;

[0017] Figure 3 This is a schematic structural diagram of a bidirectional pouring machine for an iron mold sand coating production line proposed by the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of a box opener for an iron mold sand coating production line proposed by the present invention;

[0019] Figure 5 This is a structural schematic diagram of a box turning machine for an iron mold sand coating production line proposed by the present invention. DETAILED DESCRIPTION

[0020] Reference Figure 1 The present invention proposes an iron mold sand coating production line, comprising a molding section, a core lowering section, a box assembly section, a pouring section, a box opening and dropping section, a sand cleaning section, and a mold cleaning section, which are arranged in a ring and connected in sequence by conveyor rollers, wherein the molding section comprises molding station one and molding station three for coating a first type of sand box with sand, and molding station two and molding station four for coating a second type of sand box with sand, a bidirectional roller is provided between molding station one and molding station three, and between molding station two and molding station four, a first box transfer machine for transporting the first type of sand box or the second type of sand box to the bidirectional roller is provided between the mold cleaning section and the molding section, a second box transfer machine for transporting the first type of sand box or the second type of sand box to the core lowering section is provided between molding station one and molding station two, and a shuttle bus for transporting the first type of sand box or the second type of sand box to the second box transfer machine is provided between molding station three and molding station four.

[0021] The first box transfer machine transports the first type sand box and the second type sand box after sand cleaning to the molding section. The setting of multiple molding stations improves the sand covering efficiency of the sand box. At the same time, different shapes of sand coverings can be produced on the same production line, saving equipment cost investment, realizing the recycling of sand boxes, and greatly improving production efficiency.

[0022] In the above embodiment, the first box transfer machine transports the first type of sand box to the bidirectional roller conveyor between molding station one and molding station three, and the bidirectional roller conveyor drives the first type of sand box to molding station one or molding station three for sand coating treatment. The first box transfer machine transports the second type of sand box to the bidirectional roller conveyor between molding station two and molding station four, and the bidirectional roller conveyor drives the first type of sand box to molding station two or molding station four for sand coating treatment. The sand box after sand coating treatment is transported to the core lowering section for core lowering treatment by the second box transfer machine. The multiple molding stations set up improve the sand coating efficiency of the sand box, and at the same time, sand coatings of different shapes can be produced on the same production line.

[0023] In order to realize the distribution of the first type sand box and the second type sand box among molding station one, molding station two, molding station three and molding station four, the present invention also provides an industrial camera one for identifying the first type sand box and the second type sand box between the mold clearing section and the molding section.

[0024] The first type sand box and the second type sand box in the mold cleaning section are cleaned of residual sand on the inner surface of the first type sand box and the second type sand box by pneumatic tools, and the residue on the parting surface of the first type sand box and the second type sand box is cleaned. After comparison and identification by an industrial camera in front of the first box transfer machine, the first box transfer machine transports the first type sand box to the two-way roller conveyor between molding station one and molding station three according to the identification results, and transports the second type sand box to the two-way roller conveyor between molding station two and molding station four. The two-way roller conveyor drives the sand box to the molding station.

[0025] Among them, the shaping station 1, shaping station 2, shaping station 3 and shaping station 4 are equipped with shaping machines. Figure 2 The molding machine includes a mobile sand shooting head, a mold opening and closing mechanism, a sand shooting mechanism, and a sand adding mechanism. A two-way roller conveyor transports the sand box to the molding machine to complete the movement of the sand shooting head, mold closing, compaction, sand shooting, and solidification and mold opening.

[0026] It should be further explained that the lower core section includes a box turning machine 1 for realizing the flipping of the first type sand box and the second type sand box. In order to improve the production quality of iron mold sand covering, the sand covering is checked to see if it is complete after the box is turned over. When the sand covering is incomplete, the second box moving machine can move between the box turning machine 1 and the top hole machine to transport the defective products after the box turning inspection by the box turning machine to the sand cleaning section.

[0027] The box closing section includes a box closing machine, which grabs the upper box in the sand box, moves the lower box into place, and then slowly drops it down to close the box.

[0028] An industrial camera 2 for identifying the first type of sand box and the second type of sand box is also provided between the box assembly section and the pouring section.

[0029] The pouring section comprises a first pouring channel and a second pouring channel, and the first pouring channel and the second pouring channel are respectively provided with a first roller and a second spare roller.

[0030] In the above embodiment, industrial camera 2 is used to identify the first type of sand box and the second type of sand box after the boxes are combined, and the first type of sand box is transported to the first pouring channel and the second type of sand box is transported to the second pouring channel according to the identification results. When the first pouring channel and the second pouring channel are full of other different products, the sand box can be transported to the spare roller one or spare roller two.

[0031] It should be further explained that a bidirectional pouring machine is provided between the first pouring channel and the second pouring channel for pouring into the first type sand box and the second type sand box, and the bidirectional pouring machine includes a walking vehicle body, a ladle rack, a left and right moving mechanism and a lifting mechanism. The bidirectional pouring machine is specifically referred to Figure 3 .

[0032] It should be further explained that the unpacking and dropping section has a carton unpacking machine and a carton turning machine arranged in sequence. The structure of the carton unpacking machine refers to Figure 4 After pouring, the first type sand box and the second type sand box are transported to the box opener for opening. If the casting is difficult to fall off after opening, it needs to be vibrated by the vibration motor at the box opener to loosen it, and then transported to the second box turner to flip it over and realize the falling of the casting.

[0033] It should be further explained that, referring to Figure 5 Both the box tipper 1 and the box tipper 2 include a rotary mechanism, a drive system, and a base. The drive system and the rotary mechanism are fixed on the base. The drive system is driven by a motor and a reducer to drive the drive wheel. Two rows of rollers are installed on the flipping mechanism to achieve clamping of the sand box.

[0034] In the above embodiment, the sand cleaning section includes a top hole unit and a vibrating sand removal unit connected in series. The top hole unit transports the sand box after the sand is removed to the corresponding top hole plate position, and the oil cylinder pushes the sand box up to perform top hole sand removal. After sand removal, the cleaning time can be reduced and production efficiency can be improved.

[0035] Among them, the top hole unit is connected in series with the unpacking and dropping section through a conveyor roller. The top hole unit includes a hydraulic system, a hydraulic top plate, hydraulic lifting, a top plate switching, a frame, a positioning mechanism and a motorized roller.

[0036] The vibrating sand shaker includes an air cushion (air spring), a vibrating motor, a positioning mechanism, a frame and a motorized roller table.

[0037] The vibration sand-falling unit transports the sand box after the top hole sand falling out to the vibration sand-falling machine, starts the vibration motor, and can vibrate off the loose sand covering the inner wall of the sand box after high-temperature sintering, which greatly reduces the workload of cleaning and improves production efficiency.

[0038] The first box moving machine then transports the sand boxes that have been sand-cleaned to the molding section, and the cycle continues.

[0039] In the above embodiments, the first box moving machine, the second box moving machine, the third box moving machine, the shuttle car, the molding machine, the bidirectional pouring machine, the box opening machine, the box turning machine 1, the box turning machine 2, the box closing machine, the industrial camera, the top hole machine, and the vibrating sand dropping machine are all existing technologies, so they are not described in detail in the present invention.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An iron mold sand coating production line, characterized in that: It includes a molding section, a core setting section, a box closing section, a pouring section, a box opening and dropping section, a sand cleaning section, and a mold cleaning section which are arranged in a ring and connected in sequence by conveying rollers, wherein the molding section includes molding station one and molding station three for sand-coating the first type of sand box, and molding station two and molding station four for sand-coating the second type of sand box, a bidirectional roller is provided between molding station one and molding station three, and between molding station two and molding station four, a first box transfer machine for transporting the first type of sand box or the second type of sand box to the bidirectional roller is provided between the mold cleaning section and the molding section, a second box transfer machine for transporting the first type of sand box or the second type of sand box to the core setting section is provided between molding station one and molding station two, and a shuttle bus for transporting the first type of sand box or the second type of sand box to the second box transfer machine is provided between molding station three and molding station four; An industrial camera 1 for identifying the first type of sand box and the second type of sand box is also provided between the mold clearing section and the molding section; An industrial camera 2 is also provided between the box assembly section and the pouring section for identifying the first type of sand box and the second type of sand box; The lower core section includes a box turner 1 for realizing the flipping of the first type of sand box and the second type of sand box, and the second box moving machine can move between the box turner 1 and the top hole unit to transport the defective products after the box turner has flipped and inspected to the sand cleaning section; The pouring section includes a first pouring channel and a second pouring channel. The first pouring channel and the second pouring channel are respectively provided with a spare roller conveyor 1 and a spare roller conveyor 2 at the feeding ends thereof. A third box transfer machine is provided between the lower core section and the pouring section for transferring the first type of sand box to the spare roller conveyor 1 and the second type of sand box to the spare roller conveyor 2. The box opening and dropping section has a box opener and a second box turner arranged in sequence. After pouring, the first and second type sand boxes are transported to the box opener for opening. If the castings are difficult to fall off after opening, they need to be vibrated by the vibration motor of the box opener to loosen them, and then transported to the second box turner for flipping to achieve casting dropping. Both the first and second box turners include a rotary mechanism, a drive system, and a base. The drive system and the rotary mechanism are fixed to the base. The drive system is driven by a motor and a reducer to drive the drive wheel. Two rows of rollers are installed on the turning mechanism to achieve the clamping of the sand box. The sand cleaning section includes a top hole unit and a vibrating sand removal unit connected in series. The top hole unit transports the sand box after the sand is removed to the corresponding top hole plate position. The oil cylinder pushes the sand box up to perform top hole sand removal. After sand removal, the cleaning time can be reduced and the production efficiency can be improved. Among them, the top hole unit is connected in series with the unpacking and dropping section through a conveyor roller. The top hole unit includes a hydraulic system, a hydraulic top plate, hydraulic lifting, a top plate switching, a frame, a positioning mechanism and a motorized roller.

2. The iron mold sand coating production line according to claim 1, characterized in that: Molding station one, molding station two, molding station three and molding station four are all equipped with molding machines, which include a movable sand shooting head, a mold opening and closing mechanism, a sand shooting mechanism and a sand adding mechanism. A two-way roller conveys the sand box to the molding machine to complete the movement of the sand shooting head, mold closing, compaction, sand shooting and solidification of the mold.

3. The iron mold sand coating production line according to claim 2, characterized in that: A bidirectional pouring machine is provided between the first pouring channel and the second pouring channel for pouring the first type sand box and the second type sand box. The bidirectional pouring machine includes a traveling vehicle body, a ladle frame, a left and right moving mechanism and a lifting mechanism.

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