Sand core film coating equipment

Abstract

The utility model relates to the technical field of precoated sand core film coating, in particular to sand core film coating equipment which comprises a film coating box used for yarn film coating, a partition plate is arranged in the film coating box and divides the interior of the film coating box into a purification cavity and a mixing cavity, a hollow rotating shaft is arranged in the film coating box, and a rotating shaft is arranged in the rotating shaft. And three surface exhaust pipes are arranged on the surface of the rotating shaft. The purification cavity and the mixing cavity are arranged in the film coating box, crude sand is heated through the purification cavity, so that moisture and volatile substances in the crude sand are discharged, meanwhile, redundant high-temperature air can be fed into the mixing cavity, phenolic resin is heated and melted, more energy is saved, and the production efficiency is improved. And then high-temperature crude sand is put into the mixing cavity filled with phenolic resin, the surface of the yarn core is repeatedly coated with the molten phenolic resin through cooperation of the rotating shaft and the stirring frame, precoated sand is formed, energy is saved, and meanwhile the precoated sand core coating quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film-coated sand cores, in particular to a sand core film-coating device. Background Art

[0002] Coated sand is a type of sand with a coated surface. It is usually used in construction, decoration, art and other fields. The original sand is wrapped with heated phenolic resin and coated with a thin film, which can change the appearance and properties of the sand.

[0003] In the coating process, the existing technology usually puts the raw sand and phenolic resin into a mixer together and heats and stirs them. After the phenolic resin melts, it will adhere to the surface of the raw sand. However, this method has certain defects. Since the raw sand itself may contain moisture or some volatile substances, direct adhesion with the phenolic resin will not only cause weak adhesion or other defects. Therefore, a sand core coating equipment is urgently needed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a sand core coating device, comprising a coating box for yarn coating, the interior of the coating box is provided with a partition, the partition divides the coating box into a purification chamber and a mixing chamber, the interior of the coating box is provided with a hollow rotating shaft, the surface of the rotating shaft is provided with three surface exhaust pipes, and one side of the coating box is provided with a gas supply mechanism for introducing the high-temperature gas in the purification chamber into the mixing chamber, the gas supply mechanism comprises an air pump fixedly mounted above the coating box, one end of the air pump is connected to the interior of the upper end of the purification chamber through connecting pipe 1, the other end of the air pump is connected to the interior of the bottom end of the rotating shaft through connecting pipe 2, and a drying box with a built-in desiccant is provided on connecting pipe 2.

[0005] Preferably, a drive motor is provided on the upper part of the coating box, the output shaft of the drive motor is connected to the upper end of the rotating shaft, the rotating shaft is provided with multiple stirring rods on the surface of the purification chamber, and the rotating shaft is provided with multiple annularly distributed stirring frames on the surface of the mixing chamber.

[0006] Preferably, the stirring frame includes a U-shaped plate fixed to the rotating shaft, the inner side wall and the upper and lower inner walls of the mixing chamber are all in contact with the U-shaped plate, and a plurality of reinforcing rods are provided between the U-shaped plates.

[0007] Preferably, discharge ports are provided on the surface of the partition and the bottom of the mixing chamber, and two sealing seats for sealing the discharge ports are movably connected to one side of the coating box, and a cylinder fixed to the outer wall of the coating box is provided on the sealing seat.

[0008] Preferably, an injection port is provided at the upper portion of the purification chamber, an injection pipe for introducing phenolic resin is provided on one side of the mixing chamber, and a plurality of heaters are provided on the inner wall of the purification chamber.

[0009] Preferably, a heat-insulating layer is provided inside the outer wall of the film coating box, and a supporting base is provided at the bottom of the film coating box.

[0010] By means of the above technical solution, the utility model provides a sand core coating device, which at least has the following

[0011] Beneficial effects:

[0012] 1. This kind of sand core coating equipment has a coating box with a purification chamber and a mixing chamber inside. The raw sand is heated by the purification chamber so that the moisture and volatile substances in the raw sand are discharged. At the same time, the excess high-temperature air can be sent into the mixing chamber to heat and melt the phenolic resin, which is more energy-saving. The high-temperature raw sand is then put into the mixing chamber filled with phenolic resin. The melted phenolic resin is repeatedly coated on the surface of the yarn core through the rotating shaft and the stirring frame to form coated sand, which saves energy and improves the coating quality of the coated sand core.

[0013] 2. This kind of sand core coating equipment has a stirring frame set in a U shape, which can be attached to the upper and lower and side inner walls of the mixing chamber to prevent material adhesion, ensure repeated coating of the yarn and the melted phenolic resin, and facilitate discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0015] In the attached figure:

[0016] Figure 1 This is a schematic diagram of the structure of the utility model from a partial cross-section and a first viewing angle;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model from a second perspective of a partial cross-section;

[0018] Figure 3 This is a schematic diagram of the external structure of the utility model.

[0019] In the figure: 1. Laminating box; 2. Purification chamber; 3. Mixing chamber; 4. Rotating shaft; 5. Exhaust pipe; 6. Support base; 7. Gas transmission mechanism; 701. Air pump; 702. Drying box; 8. Driving motor; 9. Stirring rod; 10. Stirring frame; 11. Cylinder; 12. Heater. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Combine Figure 1-Figure 3 As shown, the utility model provides: a sand core coating device, including a coating box 1 for yarn coating, a 5 cm thick stainless steel partition is welded inside the coating box 1, the partition divides the coating box 1 into a purification chamber 2 and a mixing chamber 3, a hollow rotating shaft 4 is installed inside the coating box 1, three surface exhaust pipes 5 are installed on the surface of the rotating shaft 4, the bottom of the exhaust pipe 5 is densely covered with exhaust holes, and the excess high-temperature gas is discharged downward, and a gas delivery mechanism 7 for introducing the high-temperature gas in the purification chamber 2 into the mixing chamber 3 is installed on one side of the coating box 1, and the gas delivery mechanism 7 includes an air pump 701 fixed above the coating box 1, and the gas One end of the pump 701 is connected to the interior of the upper end of the purification chamber 2 through a connecting pipe 1, and the other end of the air pump 701 is rotatably connected to the interior of the bottom end of the rotating shaft 4 through a connecting pipe 2, and a drying box 702 with a built-in desiccant is installed on the connecting pipe 2, which discharges the excess high-temperature gas generated during the heating process in the purification chamber 2 into the mixing chamber 3, heats and melts the phenolic resin in the mixing chamber 3, and then puts the high-temperature raw sand into the mixing chamber 3 filled with the phenolic resin. The rotating shaft 4 cooperates with the stirring frame 10 to repeatedly coat the melted phenolic resin on the surface of the yarn core to form coated sand, thereby saving energy and improving the coating quality of the coated sand core.

[0022] A drive motor 8 is installed on the upper part of the coating box 1, and the output shaft of the drive motor 8 is connected to the upper end of the rotating shaft 4. The rotating shaft 4 is located on the surface of the purification chamber 2 and is equipped with multiple stirring rods 9. A scraper that fits the bottom of the purification chamber 2 is also welded on the lowest stirring rod 9 to facilitate discharge, and the rotating shaft 4 is located on the surface of the mixing chamber 3 and is equipped with multiple annularly distributed stirring racks 10. The stirring rods 9 and the stirring racks 10 can rotate synchronously to improve the heating effect of the raw sand and phenolic resin;

[0023] The stirring frame 10 includes a U-shaped plate fixed to the rotating shaft 4. The mixing chamber 3 is cylindrical. The inner side wall and the upper and lower inner walls of the mixing chamber 3 are all in contact with the U-shaped plate. A plurality of reinforcing rods are installed between the U-shaped plates, which not only facilitates subsequent discharge but also improves mixing efficiency and quality.

[0024] The surface of the partition and the bottom of the mixing chamber 3 are both provided with discharge ports. Two sealing seats for sealing the discharge ports are movably connected to one side of the film coating box 1. A cylinder 11 fixed to the outer wall of the film coating box 1 is installed on the sealing seat. The cylinder 11 is used to drive the sealing seat to open and close the discharge port.

[0025] The top of the purification chamber 2 is provided with a material injection port and a sealing cover. One side of the mixing chamber 3 is provided with a material injection pipe for introducing phenolic resin and a sealing cover. A plurality of heaters 12 are installed on the inner wall of the purification chamber 2 to heat the raw sand in the purification chamber 2.

[0026] An insulation layer is installed inside the outer wall of the film coating box 1 to reduce heat loss, and a support base 6 is welded to the bottom of the film coating box 1.

[0027] The specific working principle of this equipment is as follows. When in use, raw sand is put into the purification chamber 2, and phenolic resin is put into the mixing chamber 3. Then, the raw sand is heated by the heater 12, and at the same time, the motor 8 drives the rotating shaft 4 to rotate, so that the stirring rod 9 and the stirring frame 10 rotate synchronously, stirring the raw sand and phenolic resin, and heating them more evenly. After a certain period of time, the high-temperature gas in the purification chamber 2 is extracted by the air pump 701, and after absorbing moisture and impurities through the drying box 702, the high-temperature gas is discharged into the mixing box to preheat and soften the phenolic resin. After a certain period of time, after the raw sand purification is completed, the raw sand is introduced into the mixing box and mixed with the phenolic resin. The high-temperature raw sand causes the phenolic resin to melt repeatedly and be coated on the surface of the raw sand, thereby completing the sand core coating.

[0028] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0029] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand core coating device, comprising a coating box (1) for coating yarn, wherein a partition is provided inside the coating box (1), and the partition divides the coating box (1) into a purification chamber (2) and a mixing chamber (3), wherein: A hollow rotating shaft (4) is arranged inside the film coating box (1), three surface exhaust pipes (5) are arranged on the surface of the rotating shaft (4), and a gas transmission mechanism (7) for introducing high-temperature gas in the purification chamber (2) into the mixing chamber (3) is arranged on one side of the film coating box (1); The air delivery mechanism (7) comprises an air pump (701) fixedly mounted above the film coating box (1); one end of the air pump (701) is connected to the interior of the upper end of the purification chamber (2) via a connecting pipe 1; the other end of the air pump (701) is connected to the interior of the bottom end of the rotating shaft (4) via a connecting pipe 2; and a drying box (702) with a built-in desiccant is provided on the connecting pipe 2.

2. A sand core coating device according to claim 1, characterized in that: A driving motor (8) is arranged at the upper part of the coating box (1), and the output shaft of the driving motor (8) is connected to the upper end of the rotating shaft (4). The rotating shaft (4) is provided with a plurality of stirring rods (9) on the surface of the purification chamber (2), and the rotating shaft (4) is provided with a plurality of stirring racks (10) distributed in a ring shape on the surface of the mixing chamber (3).

3. A sand core coating device according to claim 2, characterized in that: The stirring frame (10) comprises a U-shaped plate fixedly connected to the rotating shaft (4); the inner side wall and the upper and lower inner walls of the mixing chamber (3) are both in contact with the U-shaped plate; and a plurality of reinforcing rods are arranged between the U-shaped plates.

4. The sand core coating device according to claim 1, characterized in that: The surface of the partition plate and the bottom of the mixing chamber (3) are both provided with discharge ports, and one side of the film coating box (1) is movably connected with two sealing seats for sealing the discharge ports, and the sealing seat is provided with a cylinder (11) fixed on the outer wall of the film coating box (1).

5. The sand core coating device according to claim 1, characterized in that: An injection port is provided at the top of the purification chamber (2), an injection pipe for introducing phenolic resin is provided on one side of the mixing chamber (3), and a plurality of heaters (12) are provided on the inner wall of the purification chamber (2).

6. The sand core coating device according to claim 1, characterized in that: A heat-insulating layer is provided inside the outer wall of the film coating box (1), and a supporting base (6) is provided at the bottom of the film coating box (1).

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