Polystyrene particles and a method for producing polystyrene particles

Abstract

The present application relates to the field of plastic particle preparation, more particularly to a polystyrene particle and a preparation method of the polystyrene particle. The preparation method can utilize waste polystyrene for granulation to obtain polystyrene particles, and comprises the following steps: step one, treating waste polystyrene to obtain pure polystyrene raw material; step two, melt extruding the raw material; and step three, granulating the extruded raw material. The polystyrene raw material contains polypropylene to improve thermal performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastic particle preparation, more particularly to a polystyrene particle and a preparation method of the polystyrene particle. BACKGROUND

[0002] Polystyrene plastic or polystyrene foam plastic is one of the most widely used plastics in the world, which is a thermoplastic plastic. Polystyrene and its products are widely used in various packaging materials, advertising decoration, foam insulation materials, cushioning materials and disposable tableware, etc. However, due to multiple disposable applications, it is easy to cause waste, and its small density and large volume are not convenient for degradation, and the toxic substances carried by itself will pollute the soil and groundwater, causing white pollution. Therefore, it is extremely necessary to utilize waste polystyrene. SUMMARY

[0003] The present application provides a polystyrene particle and a preparation method of the polystyrene particle, which can utilize waste polystyrene for granulation to obtain polystyrene particles.

[0004] The above-mentioned purpose is realized by the following technical scheme:

[0005] A preparation method of a polystyrene particle, comprising the following steps:

[0006] Step one, treating waste polystyrene to obtain pure polystyrene raw materials;

[0007] Step two, melt extruding the raw materials;

[0008] Step three, granulating the extruded raw materials.

[0009] The above-mentioned purpose is realized by the following technical scheme: The device comprises a barrel capable of being heated inside, an inlet part fixedly connected and communicated at the upper right of the barrel, a square cone groove arranged above the barrel, a channel penetrating through the left and right ends of the barrel, a tail seat fixedly connected at the right end of the barrel and sealing the channel, a motor I installed on the tail seat, a screw arranged in the channel and driven to rotate by the motor I, a forming assembly detachably connected with the left end of the barrel and communicated, and a cutting assembly. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A flow chart of the preparation method of the polystyrene particle is shown;

[0011] Figure 2 A polystyrene particle preparation device is shown;

[0012] Figure 3 A barrel is shown;

[0013] Figure 4 illustrates the inside of the barrel;

[0014] Figure 5 illustrates the molding assembly;

[0015] Figure 6 illustrates the partial structure of the molding assembly;

[0016] Figure 7 illustrates the partial structure of the molding assembly;

[0017] Figure 8 illustrates the cutting assembly;

[0018] Figure 9 illustrates the maintenance assembly;

[0019] Figure 10 illustrates the square cone cover. DETAILED DESCRIPTION

[0020] A method for preparing polystyrene particles, comprising the following steps:

[0021] Step one, waste polystyrene can be recycled by solvent method to obtain pure polystyrene raw materials;

[0022] Step two, melt extrusion of the raw materials, the polystyrene raw materials contain polypropylene to improve the thermal performance;

[0023] Step three, granulation of the extruded raw materials.

[0024] As shown in Figure 3 and 4 , the screw 17 is coaxial with the channel 14, preferably, the pure polystyrene raw materials are preheated and then put into the channel 14 through the feeding part 12, the raw materials are continuously heated to melt, the motor I 16 is started to drive the screw 17 to rotate, the screw 17 moves the molten raw materials from right to left to the molding assembly to be molded, such as a strip, and then cut and granulated by the cutting assembly. Among them, the square cone groove 13 is convenient for adding molten raw materials in the middle, for example, when cleaning the inside of the molding assembly, the excess molten raw materials stuck are taken down and sent into the square cone groove 13, the square cone groove 13 is convenient for temporary lifting of the molten raw materials to facilitate pushing into the channel 14.

[0025] As shown in Figure 2 , 5As shown in Figure 7, the forming assembly includes a connecting wall 21, a sealing plate 31, and a discharge plate 32. The connecting wall 21 has a square wall structure with left and right openings. The front and rear ends of the connecting wall 21 have openings for the sealing plate 31 to slide within. The sealing plate 31 is divided into three areas. The front and rear areas are each fixedly connected to a detachably connected discharge plate 32. The middle area is used to seal the connecting wall 21. The connecting wall 21 is detachably connected to the left end of the cylinder 11 and communicates with the channel 14. The lower ends of the discharge plate 32, the lower ends of the sealing plate 31, and the bottom of the inner wall of the connecting wall 21 overlap. When the discharge plate 32 is placed at the connection point of the connecting wall 21, it is in the discharge state, and the raw material is extruded from the discharge plate 32 and granulated in conjunction with the cutting assembly. The holes in the discharge plate 32 can be in a single row, allowing the discharge holes on the discharge plate 32 to be connected to a narrower pipe to facilitate the formation of strips. The strip-shaped raw material is then cooled by a coolant before cutting. However, after passing through the forming component area, the raw material can be cooled to a certain extent and can be directly cut. The preferred cutting method is that the blade passes quickly through the discharge plate 32, and the interval between the blade passes controls the granulation size. The other discharge plate 32 is in a waiting state. When the working discharge plate 32 needs maintenance, it is pulled out directly from the connecting wall 21, while the other waiting discharge plate 32 is placed at the connecting point, allowing for uninterrupted operation. The pulled-out discharge plate 32 can be maintained by removing the partially cooled raw material accumulated on its right end and feeding it through the square cone groove 13 into the channel 14 for further heating and extrusion. Figure 7 As shown, the right end of the preferred discharge plate 32 is located to the left of the right end of the sealing plate 31, that is, the width of the discharge plate 32 is smaller than the width of the sealing plate 31. Therefore, when the discharge plate 32 slides out of the connecting wall 21, the raw material waiting to be unloaded will not remain in the connecting wall 21, but will be hidden in the groove formed between the discharge plate 32 and the connecting wall 21. Moreover, the right end face of the discharge plate 32 does not have the structure of the sealing plate 31.

[0026] like Figure 1 and 8 As shown, the cutting assembly includes a cutting plate 41, a connecting plate 42, a shaft 43, connecting rod I 44, connecting rod II 45, and a motor II 46. The upper end of the cutting plate 41 is fixedly connected to the connecting plate 42, and the upper end of the connecting plate 42 is fixedly connected to the connecting shaft 43. The shaft 43 is rotatably connected to the upper end of the connecting rod I 44. The lower end of the connecting rod I 44 is hinged to one end of the connecting rod II 45, and the other end of the connecting rod II 45 is fixedly connected to the output shaft of the motor II 46. The motor II 46 is mounted on the upper end of the connecting wall 21 via a motor mount. When the motor II 46 is started, it can drive the cutting plate 41 to reciprocate up and down through the connecting rods I 44 and II 45. The cutting plate 41 has cuts that correspond to the number and position of the discharge holes. The cuts are larger than the discharge holes. When the cutting plate 41 moves up and down, the cuts will repeatedly overlap and offset with the discharge holes to achieve synchronous pelletizing. The size of the pellets can be controlled by controlling the rotation speed.

[0027] likeFigure 9 As shown in the drawings, the device further comprises a maintenance assembly, the maintenance assembly comprises a base frame 51, two support rods 52 with the same height, a spring 53, a reciprocating seat 54, a motor III 55, a connecting seat 56, a poking rod 57, a bolt 58, a cylindrical roller 59, a motor IV 510 and an eccentric wheel 511, the upper end of the base frame 51 is fixedly connected with the two support rods 52, the two support rods 52 are arranged in front and back, the spring 53 is sleeved on the support rod 52, the spring 53 is in a compressed state, the left and right ends of the spring 53 are respectively abutted against the right end of the reciprocating seat 54 and the right end of the base frame 51, the reciprocating seat 54 is slidingly connected on the two support rods 52, the output shaft of the motor III 55 is upwardly arranged, the motor III 55 is fixedly connected on the reciprocating seat 54, the connecting seat 56 is fixedly connected on the output shaft of the motor III 55, the poking rod 57 is detachably inserted on the upper end of the connecting seat 56, the bolt 58 is horizontally inserted through the connecting seat 56 and the poking rod 57, so as to realize the positioning of the connecting seat 56 and the poking rod 57, the cylindrical roller 59 is rotatably connected on the left end of the reciprocating seat 54, the motor IV 510 is fixedly connected on the left end of the base frame 51, the eccentric wheel 511 is fixedly connected on the output shaft of the motor IV 510, the eccentric wheel 511 is arranged on the left side of the cylindrical roller 59, and the eccentric wheel 511 is attached to the cylindrical roller 59; The maintenance assembly is preferably provided with two in front and back. The motor III 55 is started to drive the self-rotation of the poking rod 57, and the motor IV 510 is started to drive the rotation of the eccentric wheel 511 to push the cylindrical roller 59 to move to the right, so as to adjust the distance between the poking rod 57 and the right end of the discharging plate 32.

[0028] When the adjacent discharging plate 32 is taken out from any one side, the poking rod 57 can be attached to the right end of the discharging plate 32, so as to scrape the raw materials, and at the same time, the self-rotating poking rod 57 can repeatedly scrape the raw materials at a high frequency, the raw materials can be coiled on the poking rod 57, because the poking rod 57 and the discharging plate 32 are extruded together, the raw materials can gradually form a pile on one side of the poking rod 57, so as to take down the poking rod 57, and then the raw materials can be directly pushed into the square cone groove 13. The structure of the poking rod 57 is preferably a strip-shaped square body, and is made of wood, so as to facilitate the adhesion of the raw materials and have a certain toughness, which is beneficial to repeatedly scraping the raw materials on the discharging plate 32.

[0029] As Figure 10As shown, the device further comprises a square pyramid cover 61 capable of being inserted and buckled in the square pyramid groove 13 and a sliding port 62 provided on the square pyramid cover 61, and the poking stick 57 is capable of being slidingly connected in the sliding port 62, wherein the square pyramid cover 61 can be buckled in the square pyramid groove 13 to achieve heat preservation, or can be slidingly connected with the head upward under the lower side of the poking stick 57 in use, when the poking stick 57 hits the gathered raw materials, the square pyramid cover 61 is directly moved upward to push and take down the raw materials from the poking stick 57, the raw materials are attached to the head of the square pyramid cover 61 or a small part is located on the inclined surface, the square pyramid cover 61 is directly inserted and buckled in the square pyramid groove 13 to directly squeeze and suck the raw materials to the screw rod 17 to achieve pushing and heat preservation. Wherein, the front and rear ends of the sealing plate 31 are fixedly connected with handles I 33, and the tail of the square pyramid cover 61 is fixedly connected with handles II 63, so as to improve the convenience of grabbing and controlling.

Claims

1. A polystyrene particle preparation apparatus, characterized by, The device comprises an inner heating cylinder, an inlet part fixedly connected to the upper right of the cylinder, a square cone groove arranged above the cylinder, a channel penetrating through the left and right ends of the cylinder, a tail seat fixedly connected to the right end of the cylinder and sealing the channel, a motor I installed on the tail seat, a screw rod arranged in the channel and driven to rotate by the motor I, a forming assembly detachably connected to the left end of the cylinder and in communication with the channel, and a cutting assembly. The forming assembly comprises a connecting wall, a sealing plate slidably connected to the connecting wall, and a discharge plate detachably fixed to the front and rear sides of the sealing plate. The device further comprises a maintenance assembly, which comprises a base frame, two support rods fixedly connected to the upper side of the base frame, a spring sleeved on the support rods, a reciprocating seat slidably connected to the support rods, a motor III fixedly connected to the upper end of the reciprocating seat, a connecting seat fixedly connected to the output shaft of the motor III, a push rod inserted into the upper end of the connecting seat, a pin penetrating through the push rod and the connecting seat, a cylindrical roller rotatably connected to the left end of the connecting seat, a motor IV fixedly connected to the base frame, and an eccentric wheel fixedly connected to the output shaft of the motor IV. The structure of the push rod is a strip-shaped square body. The motor III is started to drive the push rod to rotate, and the motor IV is started to drive the eccentric wheel to rotate and push the cylindrical roller to move to the right, thereby adjusting the distance between the push rod and the right end of the discharge plate. When the adjacent discharge plate is taken out from either side, the push rod can be attached to the right end of the discharge plate, thereby scraping the raw material. At the same time, the rotating push rod can repeatedly scrape the raw material at a high frequency, and the raw material can be bonded and rotated on the push rod. Because the push rod and the discharge plate are pressed together, the raw material can gradually form on one side of the push rod to form a pile, so as to take down the push rod and push the raw material directly into the square cone groove.

2. The polystyrene particle preparation apparatus according to claim 1, characterized by The discharge hole is single-row or multi-row.

3. The polystyrene particle preparation apparatus according to claim 2, characterized in that, The cutting assembly comprises a cutting plate slidably attached to the left end face of the discharge plate, a cutting groove arranged on the cutting plate, a connecting plate fixedly connected to the upper end of the cutting plate, a shaft fixedly connected to the upper end of the connecting plate, a connecting rod I rotatably connected to one end of the shaft, a connecting rod II hingedly connected to one end of the connecting rod I and the other end of the connecting rod I, and an output shaft of a motor II fixedly connected to the other end of the connecting rod II; the cutting groove can be coincided with or staggered with the discharge hole, and the motor II is installed above the connecting wall through a motor seat.

4. The polystyrene particle production apparatus according to claim 1, characterized by The push rod is made of wood.

5. The polystyrene particle preparation apparatus according to claim 4, characterized in that, The device further comprises a square cone cover capable of being inserted and buckled in the square cone groove, and a sliding port arranged on the square cone cover, wherein the push rod is slidably connected in the sliding port.

6. The polystyrene particle preparation apparatus according to claim 5, wherein Handle I is fixedly connected to the front and rear ends of the sealing plate, and handle II is fixedly connected to the tail of the square cone cover.

7. The polystyrene particle preparation apparatus according to claim 6, characterized in that The polystyrene raw material contains polypropylene.

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