Plastic raw material pretreatment equipment and method

Abstract

The invention provides plastic raw material pretreatment equipment and a plastic raw material pretreatment method, and aims to solve the technical problem that impurities and dust particles in existing plastic particles are not thoroughly removed. The equipment comprises a case, which is provided with an impurity removal part, a feeding part and a cleaning part which are communicated; the impurity removal structure is arranged in the impurity removal part; the screening structure is arranged at the bottom of the feeding part; and the vibrating mechanism is in transmission connection with the feeding part. The treatment method comprises the steps that metal impurities in plastic particles are adsorbed, and the adsorbed impurities are recycled into the recycling box; plastic particles are conveyed to the cleaning part through vibration in the feeding part, during feeding, powder is discharged from the powder falling opening and the gap, and then the powder falls into the first cleaning chamber to be subjected to primary cleaning and then is conveyed into the second cleaning chamber to be subjected to secondary spraying cleaning. Plastic particles are sequentially subjected to multiple procedures such as magnetic impurity removal, vibration conveying dust removal and repeated cleaning, so that powder such as impurities and dust in the plastic particles can be thoroughly removed, and the quality of plastic raw materials is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic processing, and in particular to a plastic raw material preprocessing device and method. Background Art

[0002] The main raw materials of plastic bottles include plastic particles such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). Before production, the raw materials usually need to be cleaned and dried, and the plastic particles need to be screened after drying or before cleaning (using filters with different apertures to grade and screen plastic particles of different particle sizes) to ensure that the quality of the raw materials meets production requirements. At present, during the pretreatment of plastic particles, the debris and dust particles in the plastic particles are not removed thoroughly enough. For example, in the recycled waste plastics, when the waste plastics are broken into granules or flakes, they usually contain more impurities, dust or tiny particles of powder, etc., and the plastic particles will also introduce gray powder during processing, transportation or storage. If the content of these debris and powder is too high, it will affect the quality and performance of subsequent plastic products. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the present invention provides a plastic raw material pretreatment device and method to solve the problem that the debris and dust particles in the plastic particles are not removed thoroughly enough.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A plastic raw material pretreatment device, comprising: a chassis, having a connected impurity removal part, a feeding part and a cleaning part; an impurity removal structure, arranged inside the impurity removal part; the impurity removal structure comprises: a recovery box, arranged in the impurity removal part, the recovery box divides the impurity removal part into an impurity removal chamber and a recovery chamber; a magnetic suction plate, arranged in the impurity removal chamber; a driving member, drivingly connected to the magnetic suction plate, the magnetic suction plate can be flipped under the action of the driving member to drop the adsorbed metal impurities into the recovery box; a guide plate, obliquely arranged above the magnetic suction plate, a drop channel is formed between the lower end of the guide plate and the inner wall of the impurity removal part, and the guide plate guides the material of the feed bin to the magnetic suction plate through the drop channel; a screening structure, arranged at the bottom of the feeding part; the screening structure comprises a first screening group and a second screening group, the first screening group and the second screening group are arranged in a stepped structure, and a plurality of powder drop ports are provided on the first screening group and the second screening group; a vibration mechanism, drivingly connected to the feeding part.

[0006] When the present invention processes plastic particles, the plastic particles are sequentially subjected to multiple processes such as magnetic impurity removal, vibration conveying to remove dust / powder, and cleaning, so that impurities, dust, tiny particles and other powders in the plastic particles can be thoroughly removed, which greatly improves the quality of plastic raw materials, provides stable and suitable raw materials for plastic products, and the entire processing process has good continuity of action, short construction period, and high processing efficiency. Specifically, by setting an impurity removal structure in the front section of cleaning, the impurities in the plastic particles can be removed again through the impurity removal structure to ensure that the metal impurities in the plastic particles are removed more thoroughly. When the impurities are adsorbed to a certain amount, the adsorbed impurities can be recovered by flipping the magnetic suction plate. The flipping operation of the magnetic suction plate is simple and convenient. After the magnetic suction plate is flipped and the impurities are recovered, the next round of adsorption work can be carried out, and the action continuity is good. After the plastic particles are removed from the impurities, they are vibrated and transported to the cleaning part by the feeding part. The plastic particles will pass through the screen plate with a stepped structure. Under the action of the vibration mechanism, most of the small particle powder can be discharged from the powder drop port.

[0007] Optionally, the impurity removal structure also includes: a lifting plate, movably arranged in the recovery chamber; and a lifting mechanism, drivingly connected to the lifting plate; wherein the recovery box is arranged on the lifting plate, and the lifting plate can move upward or downward under the drive of the lifting mechanism.

[0008] Optionally, the magnetic attraction plate is an electromagnetic plate, which has magnetism when electricity is applied and loses its magnetism when electricity is turned off.

[0009] Optionally, an electromagnet is fixed on the lifting plate, and the recycling box and the magnetic suction plate are both made of magnetic metal material. The bottom of the recycling box is adsorbably connected to the electromagnet. When the lifting plate drives the electromagnet and the recycling box to move upward and the recycling box is against the magnetic suction plate, the electromagnet can be magnetized to the magnetic suction plate through the recycling box. When the lifting plate drives the electromagnet and the recycling box to move downward and the recycling box is separated from the magnetic suction plate, the magnetic suction plate is demagnetized.

[0010] Optionally, the magnetic plate is provided with a plurality of metal pillars. By providing a plurality of metal pillars, the plastic particles can be fully contacted with the magnetic metal pillars, thereby improving the impurity removal effect and absorbing more magnetic impurities.

[0011] Optionally, the surface of the magnetic plate is gradually inclined from one end of the driving member to the other end, and the material dropping channel is located above the high end of the magnetic plate.

[0012] Optionally, a recovery port for taking out the recovery box is provided on a side wall of the recovery chamber, and a door panel is movably provided on the recovery port.

[0013] Optionally, the impurity removing portion and the feeding portion form an L-shaped structure.

[0014] Optionally, the chassis includes an upper box body with a rectangular structure, the impurity removal chamber and the feeding part are formed inside the upper box body, a first installation port is opened on the bottom of the upper box body, a recycling box with a top opening is arranged at the first installation port, a recycling chamber is formed inside the recycling box, and the recycling box is arranged in the recycling box.

[0015] Optionally, the first screening material group and the second screening material group are arranged opposite to each other, the first screening material group has a downward step structure, and the second screening material group has an upward step structure; the first screening material group includes multiple first screening material plates, and the multiple first screening material plates form a downward step structure along the material travel direction; the second screening material group includes multiple second screening material plates, and the multiple second screening material plates form an upward step structure along the material travel direction; wherein, the side walls of two adjacent first screening material plates are respectively provided with inclined surfaces, and the two inclined surfaces form a first channel; the side walls of two adjacent second screening material plates are respectively provided with inclined surfaces, and the two inclined surfaces form a second channel; the first channel and the second channel are both inverted V-shaped channels; a powder drop opening connected to the channel is opened between the inclined surface and the upper surface of the screening material plate.

[0016] Optionally, the first screening material group and the second screening material group are detachably arranged in the second mounting opening through a first mounting seat and a second mounting seat respectively.

[0017] Optionally, gaps are provided at the tops of the first channel and the second channel.

[0018] Optionally, a collecting bin is provided at the bottom of the first sieve material group and the second sieve material group, the collecting bin is connected to a plurality of powder outlets, and the collecting bin is connected to a dust suction fan through an air duct. By providing the collecting bin at the bottom of the sieve material plate and the dust suction fan that generates negative pressure adsorption force on the collecting bin, the bottom of the sieve material plate has an exhaust function. When plastic particles pass through the sieve material plate, under the action of the dust suction fan, small particles of powder can be discharged more smoothly from the powder outlets and gaps, further improving the deashing effect and greatly improving the quality of the plastic raw materials.

[0019] Optionally, the end of the magnetic plate away from the driving member is butted with a guide block, the guide block is located above the first installation port, and the guide block partially overlaps with the screening structure; the top of the recycling box forming the recycling chamber and the inner wall of the first installation port, the recycling box or the partition form a groove, and a notch connected to the inside of the collection bin is provided on one side of the groove; a blower mechanism blowing toward the notch is provided on one side of the outlet end of the feeding part. By providing a blower mechanism at the outlet end of the feeding part and using the blower mechanism to blow air toward the inlet end of the feeding part, the generated airflow can blow away the dust, further improve the dust removal effect, and improve the purity and quality of the plastic particles.

[0020] Optionally, the cleaning section includes a feeding channel, a first cleaning chamber and a second cleaning chamber that are interconnected; the upper end of the feeding channel is connected to the outlet end of the feeding section; the bottom of the first cleaning chamber is inclined; the second cleaning chamber is located on one side of the first cleaning chamber, and a filter is provided on the second cleaning chamber, and the filter divides the second cleaning chamber into a spray chamber and a drainage chamber, and the spray chamber is connected to the high end of the first cleaning chamber; a water injection port and a drain port are provided on the first cleaning chamber; a spray device is provided on the spray chamber; a matching first spiral feeding assembly is rotatably provided on the bottom of the first cleaning chamber; and a second spiral feeding assembly is provided above the filter.

[0021] Optionally, a driving mechanism is provided on the outside of the chassis, and the driving mechanism is connected to the first spiral feeding assembly, and the first spiral feeding assembly transports the material in the first cleaning chamber to the second cleaning chamber under the drive of the driving mechanism; the driving mechanism includes a driving motor and a transmission shaft connected to the power output end of the driving motor, a driven shaft connected to a support column is provided above the transmission shaft, and the transmission shaft and the driven shaft are connected in transmission; the end of the driven shaft away from the support column passes through the side wall of the chassis and is connected in transmission to a stirring shaft arranged in the first cleaning chamber, and a stirring blade is provided at the lower end of the stirring shaft.

[0022] A plastic raw material pretreatment method, the method is implemented by a plastic raw material pretreatment device, the method comprising the following steps:

[0023] Step S1, using a magnetic plate to absorb metal impurities in plastic particles, and recovering the adsorbed impurities into a recovery box;

[0024] Step S2, the plastic particles are vibrated and transported to the cleaning part through the feeding part. During the vibrating feeding process, when the plastic particles pass through the screen plate with a stepped structure, the powder is discharged from the powder drop port or the powder drop port and the gap under the action of the vibration mechanism and the dust suction fan;

[0025] Step S3, the plastic particles fall from the outlet end of the feeding part through the feeding channel into the first cleaning chamber for primary cleaning, and after the primary cleaning is completed, they are sent to the second cleaning chamber for secondary spray cleaning.

[0026] When the plastic raw material pretreatment method of the present invention processes plastic particles, the plastic particles are sequentially subjected to multiple processes such as magnetic impurity removal, vibration conveying deashing, and double washing, so that impurities, dust, tiny particles and other powders in the plastic particles can be completely removed, which greatly improves the quality of the plastic raw materials and provides stable and suitable raw materials for plastic products. The entire processing process has good action continuity, short construction period and high processing efficiency.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention sets an impurity removal structure in the front section of cleaning, and the impurities in the plastic particles can be removed again through the impurity removal structure to ensure that the metal impurities in the plastic particles are removed more thoroughly. By setting up multiple metal columns, the plastic particles can be fully in contact with the magnetic metal columns, thereby improving the impurity removal effect and adsorbing more magnetic impurities. When a certain amount of impurities are adsorbed, the adsorbed impurities can be recovered by flipping the magnetic suction plate. The flipping operation of the magnetic suction plate is simple and convenient. After the magnetic suction plate is flipped and the impurities are recovered, the next round of adsorption work can be carried out, and the action continuity is good.

[0029] 2. After the plastic particles are removed from the impurities, they are transported to the cleaning part through the vibration of the feeding part. The plastic particles will pass through the screen plate with a stepped structure. Under the action of the vibration mechanism, most of the small particles can be discharged from the powder outlet or the powder outlet and the gap. In addition, by providing a collection bin at the bottom of the screen plate and a dust suction fan that generates negative pressure adsorption force on the collection bin, the bottom of the screen plate has an exhaust function. When the plastic particles pass through the screen plate, under the action of the dust suction fan, the small particles can be discharged from the powder outlet and the gap more smoothly, further improving the dust removal effect and greatly improving the quality of the plastic raw materials. At the same time, by providing a blower mechanism at the outlet end of the feeding part and using the blower mechanism to blow air to the inlet end of the feeding part, the generated airflow can blow away the dust, further improving the dust removal effect and improving the purity and quality of the plastic particles.

[0030] 3. After the plastic particles are fully screened and the powder is removed in the feeding section, they fall into the cleaning section. By dividing the cleaning section into the first cleaning chamber and the second cleaning chamber, the plastic particles can be immersed and cleaned in the first cleaning chamber, and then sprayed and cleaned in the second cleaning chamber, so that the dust, tiny particles and other powders in the plastic particles can be thoroughly removed to ensure the cleanliness of the plastic raw materials and the quality of subsequent processing.

[0031] When the present invention processes plastic particles, the plastic particles are sequentially subjected to multiple processes such as magnetic impurity removal, vibration conveying and ash removal (using the screen plate and the exhaust function at the bottom to screen out the powder, and the blower mechanism to blow air), and double cleaning (using the first cleaning chamber and the second cleaning chamber to perform immersion cleaning and spray cleaning respectively), so that impurities, dust, tiny particles and other powders in the plastic particles can be completely removed, which greatly improves the quality of the plastic raw materials, provides stable and suitable raw materials for plastic products, and the entire processing process has good action continuity, short construction period and high processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic structural diagram of an embodiment of the plastic raw material pretreatment equipment in the present invention.

[0034] Figure 2 It is a schematic structural diagram of an embodiment of the impurity removal structure in the present invention.

[0035] Figure 3 It is a schematic structural diagram of an embodiment of the screening structure and the vibration mechanism in the present invention.

[0036] Figure 4 It is a schematic structural diagram of an embodiment of the screening material structure in the present invention.

[0037] Figure 5 for Figure 4 A magnified view of the structure in the middle.

[0038] Figure 6 It is a three-dimensional structural schematic diagram of the screening material structure in the present invention.

[0039] Reference numerals:

[0040] 1. Chassis; 11. Feeding bin; 12. De-impurity section; 12a. De-impurity chamber; 12b. Recovery chamber; 121. Recovery port; 122. First installation port; 123. Material guide block; 124. Notch; 13. Feeding section; 14. Cleaning section; 14a. Unloading channel; 14b. First cleaning chamber; 14c. Second cleaning chamber; 141. Filter; 142. Drain pipe;

[0041] 2. Impurity removal structure; 21. Recovery box; 22. Magnetic plate; 23. Driving member; 24. Guide plate; 25. Lifting plate; 26. Lifting mechanism; 27. Metal column; 28. Electromagnet;

[0042] 3. Screening material structure; 31. First screening material group; 311. First screening material plate; 3111. Powder drop port; 3112. Inclined surface; 32. Second screening material group; 321. Second screening material plate; 33. First channel; 34. First mounting seat; 35. Second mounting seat;

[0043] 4. Vibration mechanism; 41. Vibration mounting seat;

[0044] 5. Collection chamber; 51. Through hole;

[0045] 6. Blowing mechanism; 7. First spiral feeding assembly; 8. Second spiral feeding assembly;

[0046] 9. Driving mechanism; 91. Driving motor; 92. Transmission shaft; 93. Universal joint; 94. Support column; 95. Driven shaft; 96. Belt; 97. Driving bevel gear; 98. Agitator shaft; 99. Driven bevel gear;

[0047] 10. Drying structure; 101. Heating seat; 102. Drying box; 103. Mixing mechanism. DETAILED DESCRIPTION

[0048] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0049] Example 1

[0050] like Figure 1 to Figure 6 As shown, an embodiment of the present invention provides a plastic raw material pretreatment device, including: a chassis 1, a debris removal structure 2, a screening structure 3 and a vibration mechanism 4.

[0051] The inside of the chassis 1 is connected with a cleaning part 12, a feeding part 13 and a cleaning part 14 in sequence, a feeding bin 11 is arranged above the cleaning part 12, a cleaning structure 2 is arranged inside the cleaning part 12, a screening structure 3 is arranged at the bottom of the feeding part 13, and a vibration mechanism 4 is connected to the feeding part 13. When in use, the granular plastic raw material enters the cleaning part 12 from the feeding bin 11, the cleaning structure 2 adsorbs the metal impurities in the material, and under the action of vibration, the material enters one end of the feeding part 13 from the outlet end of the cleaning part 12, and is then transported from one end of the feeding part 13 to the other end. During the vibration feeding process of the material, the screening structure 3 screens out and removes the powder or small particle powder in the material, and the removed material falls into the cleaning part 14 for cleaning, and then the cleaned material can be dried and screened.

[0052] Example 2

[0053] The present invention provides a plastic raw material pretreatment device, referring to Figure 1 and Figure 2 As shown, in this embodiment, the impurity removal structure 2 includes: a recovery box 21, a magnetic attraction plate 22, a driving member 23 and a guide plate 24.

[0054] The recycling box 21 is arranged in the impurity removal part 12, and the recycling box 21 divides the impurity removal part 12 into an impurity removal chamber 12a and a recycling chamber 12b. The magnetic plate 22 is arranged in the impurity removal chamber 12a above the recycling box 21. The top of the recycling box 21 is open and adapted to the magnetic plate 22 and the recycling chamber 12b. The magnetism of the magnetic plate 22 can adsorb metal impurities in the material. The driving member 23 is connected to the magnetic plate 22, and the magnetic plate 22 can be flipped under the action of the driving member 23. After the magnetic plate 22 is flipped, it is demagnetized so that the adsorbed metal impurities fall into the recycling box 21. The guide plate 24 is obliquely arranged above the magnetic attraction plate 22, the high end of the guide plate 24 is connected to the top wall of the impurity removal part 12, the low end faces the side wall of the impurity removal part 12, and a material drop channel is formed between the low end and the inner wall of the impurity removal part 12. The guide plate 24 guides the material of the feed bin 11 into the material drop channel, and the material falls onto the magnetic attraction plate 22 through the material drop channel.

[0055] Optionally, the upper and lower surfaces of the magnetic plate 22 are gradually inclined from one end of the driving member 23 to the other end, and the lower end of the guide plate 24 is arranged close to the driving member 23, that is, the blanking channel formed by the guide plate 24 is located above the higher end of the magnetic plate 22.

[0056] Optionally, a recovery port 121 for taking out the recovery box 21 is provided on the side wall of the recovery chamber 12b, and a door panel is movably provided on the recovery port 121. When in use, the recovery box 21 can be taken out by opening the door panel.

[0057] As an implementation scenario, in this scenario, the impurity removal part 12 and the feeding part 13 form an L-shaped structure. Optionally, the chassis 1 includes an upper box body with a rectangular structure, the impurity removal chamber 12a and the feeding part 13 are formed inside the upper box body, a first installation opening 122 is opened on the bottom of one end of the upper box body, a recycling box with a top opening is arranged at the first installation opening 122, a recycling chamber 12b is formed inside the recycling box, and the impurity removal chamber 12a is above the first installation opening 122, the recycling box 21 is arranged in the recycling box, and the recycling opening 121 is opened on one side wall of the recycling box.

[0058] Optionally, the upper case of the chassis 1 is provided with a second installation opening, the second installation opening is located at one side of the first installation opening 122, and the screening structure 3 is fixedly or detachably arranged in the second installation opening.

[0059] Optionally, the vibration mechanism 4 is arranged at the bottom of the upper box body through the vibration mounting seat 41. When the vibration mechanism 4 is working, the vibration is generated and transmitted to the upper box body through the vibration mounting seat 41, so that the upper box body generates high-frequency vibration, and the material enters the inlet end of the feeding part 13 from the outlet end of the impurity removal part 12, and then enters the cleaning part 14 through multiple screening plates. When in use, the vibration generated by the vibration mechanism 4 can be transmitted to the magnetic attraction plate 22, and a vibrator can also be set on the magnetic attraction plate 22.

[0060] Optionally, one end of the magnetic plate 22 away from the driving member 23 is butted with a guide block 123, both ends of the guide block 123 are connected to the front and rear side walls of the impurity removal part 12, and one side thereof is connected to one end of the magnetic plate 22. The guide block 123 can also be arranged tilted, that is, the higher end of the guide block 123 is connected to the lower end of the magnetic plate 22, and the upper surface of the guide block 123 and the upper surface of the magnetic plate 22 form an inclined surface.

[0061] Optionally, a sealing layer is provided on the right side wall and the front and rear side walls of the impurity removal part 12 and the right side wall of the material guide block 123, the sealing layer is adapted to the magnetic attraction plate 22, and the surrounding side walls of the magnetic attraction plate 22 are pressed and connected to the sealing layer.

[0062] As an implementation scenario, in this scenario, the driving member 23 includes a rotating shaft and a turntable connected to the rotating shaft. One end of the rotating shaft is connected to the magnetic plate 22, and the other end passes through the right side wall of the impurity removal part 12 and is connected to the turntable. When in use, the turntable is rotated, thereby driving the magnetic plate 22 to flip through the rotating shaft. Optionally, there are multiple rotating shafts, one end of the multiple rotating shafts is connected to the magnetic plate 22, and the other end passes through the side wall of the impurity removal part 12 and is connected to a connecting plate. The turntable is connected to the side wall of the connecting plate away from the rotating shaft. When in use, the turntable is rotated to drive the connecting plate to rotate, and the connecting plate drives the rotating shaft to rotate, and the rotating shaft drives the magnetic plate 22 to flip.

[0063] As another implementation scenario, the driving member includes a motor and a rotating shaft. One end of the rotating shaft is connected to the power output end of the motor, and the other end passes through the right side wall of the impurity removal part 12 and is connected to the magnetic attraction plate 22. When the motor is started, the motor drives the magnetic attraction plate to rotate through the rotating shaft.

[0064] Example 3

[0065] On the basis of the embodiment 2, in this embodiment, the impurity removal structure 2 further includes a lifting plate 25 and a lifting mechanism 26. The recovery box 21 is movably arranged in the recovery chamber 12b through the lifting plate 25.

[0066] Specifically,

[0067] The lifting plate 25 is arranged at the bottom of the recovery box 21, and the lifting mechanism 26 is drivingly connected to the lifting plate 25. The recovery box 21 can move upward or downward under the drive of the lifting mechanism 26. When the magnetic plate 22 normally absorbs metal impurities, the recovery box 21 is arranged close to the magnetic plate 22 under the action of the lifting mechanism 26, that is, the upper surface of the recovery box 21 is against the lower surface of the magnetic plate 22 to prevent the material from falling into the recovery chamber 12b. When it is necessary to pour the metal impurities on the magnetic plate 22 into the recovery box 21, the recovery box 21 is first moved downward, and then the magnetic plate 22 is turned over to pour the adsorbed metal impurities into the recovery box 21.

[0068] Optionally, the lifting mechanism 26 uses an electric telescopic rod or a lifting cylinder.

[0069] Optionally, a plurality of metal pillars 27 are disposed on the magnetic attraction plate 22. The metal pillars 27 are made of a magnetically conductive metal material.

[0070] As an implementation scenario, in this scenario, the magnetic plate 22 is an electromagnetic plate. The magnetic plate 22 has magnetism when it is powered on, and the magnetism disappears when it is powered off. When the magnetic plate 22 is powered on, it adsorbs metal impurities in the material flowing through it. When it is necessary to pour the metal impurities on the magnetic plate 22 into the recovery box 21, the magnetic plate 22 can be flipped over first, and then the magnetic plate 22 can be powered off to pour the adsorbed metal impurities into the recovery box 21. Of course, the magnetic plate 22 can also be powered off first and then flipped over.

[0071] As another implementation scenario, an electromagnet 28 is provided between the lifting plate 25 and the recycling box 21. In this embodiment, the recycling box 21 and the magnetic plate 22 are both made of a magnetically conductive metal material, and the bottom of the recycling box 21 can be adsorbed and connected to the electromagnet 28. The lifting plate 25 drives the electromagnet 28 and the recycling box 21 to move upward, so that the recycling box 21 abuts against the magnetic plate 22. The electromagnet 28 is energized, so that the recycling box 21 and the magnetic plate 22 abutting against the recycling box 21 are both magnetic, so as to achieve the adsorption of metal impurities by the magnetic plate 22. When it is necessary to pour the metal impurities on the magnetic plate 22 into the recycling box 21, the electromagnet 28 and the recycling box 21 move downward to separate the recycling box 21 from the magnetic plate 22, so that the magnetic plate 22 is demagnetized, and then the driving member 23 drives the magnetic plate 22 to flip so that the adsorbed metal impurities fall into the recycling box 21.

[0072] Optionally, a plurality of metal pillars 27 are provided on the upper and lower surfaces of the magnetic suction plate 22. When the lifting plate 25 drives the recycling box 21 to move upward and the recycling box 21 abuts against the magnetic suction plate 22, the metal pillars 27 can also avoid abutting against the inside of the recycling box 21. In this way, when the design of the electromagnet 28 is adopted, the magnetic conductivity of the electromagnet 28 and the magnetic suction plate 22 can be improved. At the same time, after the magnetic suction plate 22 is turned over and the impurities are recovered, the magnetic suction plate 22 does not need to be turned over again to carry out the next round of adsorption work, and the working continuity is good. Of course, the magnetic suction plate 22 can also be flipped to an inclined state, that is, the magnetic suction plate 22 is flipped to an inclined state, and the magnetic suction plate 22 is demagnetized, and the adsorbed metal impurities slide along the inclined surface into the recycling box 21 below.

[0073] Optionally, when the magnetic attraction plate 22 is tilted, the lengths of the plurality of metal pillars 27 are different, so that each metal pillar 27 can abut against the inner surface of the recovery box 21 .

[0074] Example 4

[0075] The present invention provides a plastic raw material pretreatment device, referring to Figure 1 , Figure 3-Figure 6As shown, in this embodiment, the screening material structure 3 includes a first screening material group 31 and a second screening material group 32 which are arranged opposite to each other. The first screening material group 31 has a downward step structure, and the second screening material group 32 has an upward step structure. A plurality of powder dropping openings 3111 are provided on the first screening material group 31 and the second screening material group 32. When in use, under the action of the vibration mechanism 4, the material is fed from the inlet end of the feeding part 13 to the cleaning part 14, and the material will pass through the first screening material group 31 and the second screening material group 32 in sequence. When feeding, usually large particles are in the upper part, and small particles are in the lower part. The material is firstly screened by the downward step structure, and then screened by the upward step structure. The upward step structure can slow down the flow rate of the material, increase the residence time of the material being screened, and improve the removal effect of the powder.

[0076] Optionally, the powder drop opening 3111 is in a long strip structure, and the powder drop opening 3111 of the long strip structure is arranged along the length direction of the screen plate, that is, Figure 6 As shown, the powder drop opening 3111 of the long strip structure is arranged along the X-axis direction.

[0077] Optionally, the first screening material group 31 includes a plurality of first screening material plates 311, and the plurality of first screening material plates 311 form a downward step structure along the material travel direction, that is, the plurality of first screening material plates 311 are arranged in steps from high to low in the Y-axis direction. The second screening material group 32 includes a plurality of second screening material plates 321, and the plurality of second screening material plates 321 form an upward step structure along the material travel direction, that is, the plurality of second screening material plates 321 are arranged in steps from low to high in the Y-axis direction.

[0078] Optionally, the side walls of two adjacent first screen plates 311 are respectively provided with inclined surfaces 3112, the two inclined surfaces 3112 form a first channel 33, the first channel 33 is in an inverted V-shaped structure, the upper surface of the first screen plate 311 is a step surface, and a powder drop opening 3111 connected to the first channel 33 is provided between the inclined surface 3112 and the step surface. The structure of the second screen plate 321 is basically the same as that of the first screen plate 311, that is, the side walls of two adjacent second screen plates 321 are also respectively provided with inclined surfaces 3112, the two inclined surfaces 3112 form a second channel, the second channel is in an inverted V-shaped structure, the upper surface of the second screen plate 321 is a step surface, and a powder drop opening 3111 connected to the second channel is provided between the inclined surface 3112 and the step surface.

[0079] Furthermore, a connected flat surface is provided above the right side inclined surface of the first channel 33, and a step is formed between two adjacent screen plates through the flat surface, that is, the left side of the first screen plate 311 has a flat surface and an inclined surface connected to the flat surface, the right side of the first screen plate 311 is an inclined surface, and the inclined surfaces of the two first screen plates 311 after splicing form an inverted V-shaped first channel 33, and the flat surface is located above the first channel 33. The flat surface above the second channel is opposite to the first channel 33, that is, the right side of the second screen plate 321 has a flat surface and an inclined surface connected to the flat surface, the left side of the second screen plate 321 is an inclined surface, and the two second screen plates 321 after splicing form an inverted V-shaped second channel, and the flat surface is located above the second channel.

[0080] The connection between the first sieve plate 311 and the second sieve plate 321 may be arranged in a straight manner, that is, the straight surface on the left side of the first sieve plate 311 is connected to the straight surface on the right side of the second sieve plate 321 .

[0081] The sieve plates on both sides of the sieve structure 3 are both straight structures, that is, the side walls of the sieve plates on the right side of the first sieve group 31 and the left side of the second sieve group 32 are both straight structures, which are respectively arranged in contact with the inner walls on the left and right sides of the second installation port, and the side of the sieve plate away from the second installation port has a slope.

[0082] Optionally, there is a gap (not shown in the figure) between every two adjacent first screen plates 311 and between every two adjacent second screen plates 321, that is, the top of the first channel 33 and the second channel of the inverted V-shaped structure have a gap for powder to fall, so that when the material is fed from the inlet end of the feeding section 13 to the cleaning section 14, the material will pass through the first screen plate 311 and the second screen plate 321 in turn, and the small particle powder can be further discharged through the cooperation of the powder drop port 3111 and the gap, which greatly improves the powder removal effect and the quality of the granular raw material.

[0083] Optionally, the size of the powder drop opening 3111 and / or the gap is about 1 mm.

[0084] In one embodiment, the screening structure 3 further includes two first mounting seats 34 and two second mounting seats 35, and the first mounting seats 34 and the second mounting seats 35 are connected to each other. The two ends of the plurality of first screening plates 311 are respectively connected to the side walls of the first mounting seats 34, and the plurality of first screening plates 311 located between the two first mounting seats 34 are distributed in a stepped manner downward along the Y-axis direction. The two ends of the plurality of second screening plates 321 are respectively connected to the side walls of the second mounting seats 35, and the plurality of second screening plates 321 located between the two second mounting seats 35 are distributed in a stepped manner upward along the Y-axis direction. The screening plates are arranged in the second mounting port on one side of the first mounting port 122 through the mounting seats.

[0085] Optionally, the adjacent ends of the first mounting seat 34 and the second mounting seat 35 may be in an integrated connection structure or may be movably spliced.

[0086] In one embodiment, in order to facilitate the cleaning and maintenance of the screening plate, the screening structure 3 is detachably connected. As an implementation scenario, in this scenario, a card slot is provided on one side wall of the upper box body, and a through slot is provided on the other side, that is: a card slot is provided on one side of the inner side of the first mounting port, and the other side opposite thereto is a through slot. The first mounting seat 34 and the second mounting seat 35 are arranged in the same manner. This embodiment is described by taking the first mounting seat 34 as an example, wherein one first mounting seat 34 is movably arranged in the card slot, and the other first mounting seat 34 is arranged in the through slot through a sealing plate, that is: one side of the first mounting seat 34 is connected to the sealing plate, and the sealing plate is movably arranged in the through slot. When in use, the sealing plate is pulled so that the first mounting seat 34 arranged in the card slot is detached from the card slot, thereby taking out the screening group.

[0087] Optionally, a handle is provided on the sealing plate.

[0088] Optionally, a pressing clamp for pressing the sealing plate is provided outside the sealing plate, and the pressing clamp can be installed on the outer wall of the upper box body, and one end of the pressing clamp for pressing is fixedly pressed on the sealing plate. In this way, when in use, the screening material structure 3 can have a strong stability.

[0089] Example 5

[0090] The present invention provides a plastic raw material pretreatment device. On the basis of embodiment 4, in this embodiment, it also includes a collecting bin 5, which is arranged at the bottom of the first sieve group 31 and / or the second sieve group 32. The top of the collecting bin 5 is open and connected to a plurality of powder dropping ports 3111. The collecting bin 5 is connected to a dust suction fan through an air duct, that is, a through hole 51 is provided on the collecting bin 5, one end of the air duct is connected to the through hole 51, and the other end is connected to the input end of the dust suction fan. The dust suction fan is not shown in the figure, and an existing variable frequency fan can be used to generate negative pressure inside the collecting bin 5 through the fan, so that the powder on the sieve plate is sucked out through the powder dropping port 3111 and the gap, and the sucked powder can be stored and collected by a collecting device. In this embodiment, when the material is vibrated and conveyed, the powder is sieved out by the sieve plate with a stepped structure, and the negative pressure generated by the dust suction fan is cooperated, so that the waste on the sieve plate can fall out smoothly from the powder dropping port 3111.

[0091] Optionally, the collection bin 5 is located inside the vibration mounting base 41 .

[0092] As an implementation scenario, in this scenario, a collecting bin 5 is respectively provided at the bottom of the first screening material group 31 and the second screening material group 32, and correspondingly, the two collecting bins are respectively connected to dust suction fans through air ducts.

[0093] As another preferred implementation scenario, in this scenario, reference Figure 3 As shown, a collecting bin 5 is provided at the bottom of the first screening material group 31 and the second screening material group 32, and the bottom of the collecting bin 5 is arranged in a slope. Specifically, a through hole 51 is arranged in the middle position of the collecting bin 5, and one end of the slope is arranged to tilt upward from the through hole 51.

[0094] Example 6

[0095] The embodiment of the present invention application provides a plastic raw material pretreatment device. On the basis of embodiment 5, in this embodiment, the top of the collecting bin 5 is open, and its top is connected to the bottom of the upper box body outside the installation groove.

[0096] Example 7

[0097] The application embodiment of the present invention provides a plastic raw material pretreatment device. On the basis of embodiment 5, in this embodiment, the top of the collection bin 5 is open, and one side of the top is connected to the outer wall of the recovery chamber 12b, and the other side is connected to the bottom of the upper box body outside the installation groove. In this embodiment, the guide block 123 is located above the first installation opening 122, and a notch 124 is formed at one side of the top of the recovery box forming the recovery chamber 12b and the first installation opening 122. The notch 124 is connected to the internal cavity of the collection bin 5, and because the top of one side of the recovery box has a guide block 123, and one side between the guide block 123 and the recovery box is provided with a recovery box 21 or a partition, so that the top wall of the recovery box and the outer wall or partition of the recovery box 21 and the inner wall of the first installation opening 122 form a groove, which is a part of the first installation opening 122, and the groove is located below the guide block 123 and is connected to the collection bin 5 through the notch 124. That is to say, in other embodiments, no groove is formed under the guide block 123, and the top of the recovery box may be abutted against the bottom of the guide block 123, or the bottom of the guide block 123 may extend to the top of the recovery box, or one end of the guide block 123 may be butt-jointed to one end of the sieving structure 3; and in this embodiment, a groove is formed at the bottom of the guide block 123 (such as Figure 2 The position indicated by “first mounting opening 122” in FIG.

[0098] The partition is not shown in the figure. The partition can be set between the guide block 123 on one side of the recovery box 21 and the top of the recovery box, that is, the partition forms the right inner wall of the groove, and the inner wall of the first installation opening 122 is the left inner wall of the groove.

[0099] Optionally, one end of the material guiding block 123 away from the magnetic attraction plate 22 extends to above the first material screening plate 311 , that is, a portion of the material guiding block 123 overlaps a portion of the first material screening plate 311 .

[0100] Optionally, the notch 124 is formed by a gap between the recovery box and an inner wall of the first installation opening 122 .

[0101] Furthermore, a blower mechanism 6 is provided on one side of the sieve structure 3 away from the notch 124. When the material is vibrating and feeding on the sieve plate, the blower mechanism 6 blows air toward the first installation port 122, and the light powder in the material can be blown toward the inlet end of the impurity removal part 12 and / or the feeding part 13. On the one hand, the powder can be fed through the sieve plate again, and sucked away by the negative pressure generated by the collection bin 5 during feeding; on the other hand, the powder can be deposited in the groove at the first installation port 122 and enter the collection bin through the notch 124. The present embodiment can further reduce the powder rate by providing the blower mechanism 6.

[0102] In one embodiment, the blower mechanism 6 is installed on the left side wall of the upper box.

[0103] It should be noted that the height difference of the stepped structure in the accompanying drawings is schematic, and the distance between the guide block 123 and the first mounting port 122 is also schematic, and is only used to express the idea of ​​the present technical solution. In actual application, it can be set according to specific circumstances. For example, the guide block 123 is set upward close to the feed hopper 11 to increase the depth of the groove, so as to facilitate the dust blown by the blower mechanism 6 to fall into the groove.

[0104] Example 8

[0105] The present invention provides a plastic raw material pretreatment device, referring to Figure 1 As shown, in this embodiment, the cleaning portion 14 includes a feed channel 14a, a first cleaning chamber 14b and a second cleaning chamber 14c which are connected in sequence. The cross-sections of the feed channel 14a, the first cleaning chamber 14b and the second cleaning chamber 14c form an L-shaped structure. The upper end of the feed channel 14a is connected to the outlet end of the feeding portion 13, the bottom of the first cleaning chamber 14b is inclined, and a water injection port is provided on the first cleaning chamber 14c, and a drainage port is provided at the lower end of the bottom. The second cleaning chamber 14c is located on one side of the first cleaning chamber 14b, and the upper end of the second cleaning chamber 14c is connected to the high end of the first cleaning chamber 14b. A filter screen 141 is provided on the second cleaning chamber 14c, and the filter screen 141 divides the second cleaning chamber 14c into a spray chamber and a drainage chamber. The spray chamber is located above the filter screen 141, and the drainage chamber is located below the filter screen 141. The spray chamber is connected to the high end of the first cleaning chamber 14b, and a spray device is provided in the spray chamber, and a drain pipe 142 is connected to the drainage chamber. A first spiral feeding assembly 7 is rotatably provided on the bottom of the first cleaning chamber 14b. A second spiral feeding assembly 8 is provided in the spray chamber above the filter screen 141.

[0106] Furthermore, a driving mechanism 9 is provided on the outside of the chassis 1 , and the driving mechanism 9 is drivingly connected to the first spiral feeding assembly 7 . Driven by the driving mechanism 9 , the first spiral feeding assembly 7 transports the material in the first cleaning chamber 14 b to the second cleaning chamber 14 c .

[0107] Optionally, the transmission shaft 92 of the driving mechanism 9 is connected to one end of the transport shaft of the first spiral feeding assembly 7 through a universal joint 93, and the transport shaft at the other end of the first spiral feeding assembly 7 is connected to the transport shaft of the second spiral feeding assembly 8 through a linkage universal joint transmission, so that when the driving mechanism 9 drives the first spiral feeding assembly 7 to transport the material in the first cleaning chamber 14b to the second cleaning chamber 14c, the material is transported out by the second spiral feeding assembly 8.

[0108] Optionally, a stirring assembly is provided in the first cleaning chamber 14b, through which the liquid in the first cleaning chamber 14b can be stirred to improve the cleaning effect.

[0109] The spiral feeding assembly includes a conveying shaft and a spiral blade arranged on the conveying shaft; the spray assembly is not shown in the figure, which includes a nozzle arranged at the top of the first cleaning chamber 14b and a water inlet pipe connected to the nozzle, and a water pump is installed on the water inlet pipe. The water pump draws water from an external source into the nozzle and sprays it out from the nozzle; the spiral feeding assembly and the spray device are both relatively mature existing technologies, so they are not repeated in this embodiment.

[0110] When in use, water is injected into the first cleaning chamber 14b through the water injection port to soak or stir the plastic raw materials for cleaning. After cleaning, the driving mechanism 9 is started, and the first spiral feeding assembly 7 transports the materials in the first cleaning chamber 14b to the second cleaning chamber 14c. At the same time, the spray device sprays and rinses the materials in the second cleaning chamber 14c, and the materials are then transported to the next process by the second spiral feeding assembly 8.

[0111] Example 9

[0112] The embodiment of the present invention application provides a plastic raw material preprocessing equipment. On the basis of embodiment 8, in this embodiment, the driving mechanism 9 includes a driving motor 91 and a transmission shaft 92 connected to the power output end of the driving motor 91, the transmission shaft 92 is rotatably set on a support column 94, and a driven shaft 95 is rotatably set on the support column 94 above the transmission shaft 92. Pulleys are installed on the transmission shaft 92 and the driven shaft 95, and belts 96 are sleeved on the two pulleys. One end of the transmission shaft 92 is connected to one end of the transport shaft of the first spiral feeding assembly 7 through a transmission universal joint 93, and the end of the driven shaft 95 away from the support column 94 passes through the side wall of the chassis and is located above the first cleaning chamber 14, and a driving bevel gear 97 is installed on the end. A stirring shaft 98 is rotatably arranged on the unloading channel 14a, the upper end of the stirring shaft 98 is rotatably connected to the top wall of the chassis 1 through a bearing, and the lower end extends to the top of the first spiral feeding assembly 7, and a stirring blade is arranged at the lower part of the stirring shaft 98, and a driven bevel gear 99 meshing with the active bevel gear 97 is arranged above the stirring blade. When in use, when the driving motor 91 drives the transmission shaft 92 to rotate, the transmission shaft 92 rotates through the belt 96 to drive the driven shaft 95 to rotate, and the driven shaft 95 rotates through the meshing active bevel gear 97 and the driven bevel gear 99 to drive the stirring shaft 98 to rotate, so that the stirring blade stirs in the first cleaning chamber 14b to improve the material cleaning effect. Through the linkage setting, the processing equipment structure is compact.

[0113] In one embodiment, the blower mechanism 6 may be a fan, as shown in FIG. Figure 1 As shown, the fan is mounted on the driven shaft 95. In other preferred embodiments, the blower mechanism 6 can adopt an existing blower, and the blower can be configured to only blow away dust or small particles of powder with a relatively light mass.

[0114] Example 10

[0115] The embodiment of the present invention application provides a plastic raw material pretreatment device. In this embodiment, the pretreatment device also includes a drying structure 10, which includes but is not limited to: a heating seat 101 and a drying box 102 arranged on the heating seat 101, and the drying box 102 has a feed port connected to the outlet of the second cleaning chamber 14c at the upper end of one side, and a discharge port at the lower end of the other side.

[0116] Optionally, a mixing mechanism 103 for stirring the raw materials is provided in the drying box 102 .

[0117] Embodiment 11

[0118] The present invention provides a method for preprocessing plastic raw materials, which comprises the following steps:

[0119] Step S1 , impurity removal treatment: using the magnetic suction plate 22 to adsorb metal impurities in the plastic particles, and recovering the adsorbed impurities into the recovery box 21 .

[0120] The step S1 specifically includes the following process:

[0121] Step S11, before feeding, start the lifting mechanism 26, the lifting mechanism 26 drives the recovery box 21 to rise until the upper end of the recovery box 21 abuts against the lower surface of the magnetic plate 22, and then energize the magnetic plate 22;

[0122] Step S12, plastic particles are put into the feed bin 11, and the plastic particles are guided to the magnetic plate 22 through the guide plate 24, and the magnetic plate 22 is energized to absorb metal impurities in the plastic particles;

[0123] Step S12, recovering the metal impurities adsorbed by the magnetic plate 22, the specific operation method is: the feed bin 11 suspends unloading, the lifting mechanism 26 drives the recovery box 21 to descend, so that the recovery box 21 is away from the magnetic plate 22, at this time, the driving member 23 is used to flip the magnetic plate 22, and the magnetic plate 22 is powered off before or after the magnetic plate 22 is flipped to achieve the adsorbed metal impurities falling into the recovery box 21 below, finally, the recovery box 21 is taken out by opening the door panel on the recovery port 121.

[0124] In step S12, the metal impurities adsorbed by the magnetic plate 22 may be recovered after the plastic particles are fed, or after the magnetic plate 22 or the magnetic plate 22 and the metal column 27 adsorb a certain amount of metal impurities.

[0125] In one embodiment, the magnetic attraction plate 22 can directly adopt an electromagnetic plate, and the magnetism and demagnetization can be achieved by powering on or off the electromagnetic plate.

[0126] In another implementation attempt, an electromagnet 28 is provided between the lifting plate 25 and the recovery box 21, so that the magnetic plate 22 is made magnetic and demagnetized by means of magnetic conduction.

[0127] Step S2, vibrating and conveying to remove powder: the plastic particles are vibrated and conveyed to the cleaning part in the feeding part. During the vibrating and feeding process, when the plastic particles pass through the screen plate with a stepped structure, the powder is discharged from the powder drop port or the powder drop port and the gap.

[0128] In one embodiment, in step S2, the dust suction fan is started, and under the action of the dust suction fan, the powder can be discharged more smoothly from the powder dropping port 3111 or the powder dropping port 3111 and the gap.

[0129] In one embodiment, in step S2, the blower mechanism 6 is started, and the blower mechanism 6 blows air toward the inlet end of the feeding portion 13, and the generated airflow blows the dust toward the inlet end of the feeding portion 13, and the dust is then discharged into the collection bin 5 through the powder dropping opening 3111 and / or the gap and / or the groove. In this embodiment, the dust suction fan can be started synchronously, so that the dust can be discharged into the collection bin 5 more smoothly through the powder dropping opening 3111 and / or the gap and / or the groove.

[0130] Step S3, cleaning: the plastic particles fall from the outlet end of the feeding part 13 through the feeding channel 14a into the first cleaning chamber 14b for primary cleaning, and after the primary cleaning is completed, they are sent to the second cleaning chamber 14c for secondary spray cleaning.

[0131] The step S3 specifically includes the following process:

[0132] Step S31, the plastic particles fall from the outlet end of the feeding part 13 into the first cleaning chamber 14b through the feeding channel 14a, and liquid is injected into the first cleaning chamber 14b to soak the plastic particles;

[0133] Step S32, after the plastic particles are soaked for a certain period of time, they are transported to the second cleaning chamber 14c in a climbing manner through the first spiral feeding assembly 7, and the spraying device is turned on to spray the plastic particles on the second cleaning chamber 14c. The spraying water flows to the drainage chamber through the filter screen 141, and the plastic particles continue to be fed into the next process through the second spiral feeding assembly 8.

[0134] In one embodiment, in step S31, during the soaking process of the plastic particles, the liquid may be stirred by a stirring component.

[0135] In one embodiment, the liquid in step S31 may be a chemical cleaning agent, which is used to decompose dust and dirt.

[0136] In one embodiment, in step S32, the first screw feeding assembly 7 and the second screw feeding assembly 8 may work intermittently.

[0137] In one embodiment, in step S32 , the first spiral feeding assembly 7 is driven by a driving motor 91 .

[0138] In one embodiment, in step S32 , the second screw feeding assembly 8 is linked with the first screw feeding assembly 7 .

[0139] In one embodiment, in step S32 , a stirring shaft 98 is provided in the first cleaning chamber 14 b , and the stirring shaft 98 is linked to the first spiral feeding assembly 7 .

[0140] Step S4, drying: After the cleaning in the second cleaning chamber 14c is completed, the plastic particles are sent to the drying box 102 for drying.

[0141] In other embodiments, the dried raw materials fall into the screening device through the discharge port of the drying box 102. For example, the screening device includes a tank body, and a plurality of screening areas are provided on the tank body. Filters with different apertures are installed on the plurality of screening areas. The plastic is graded by the filter and then bagged. In this way, the dust and powder of the plastic particles can be completely removed before the plastic particles are graded and bagged, which reduces the powder at the bottom of the bag of the finished plastic particles and improves the quality of the plastic products.

[0142] When processing plastic particles, the present invention sequentially undergoes multiple processes such as magnetic impurity removal, vibration conveying and simultaneous powder removal (using the screen plate and the exhaust function at the bottom to screen out the powder, and using the blower mechanism to blow air), and double cleaning (using the first cleaning chamber and the second cleaning chamber to perform immersion cleaning and spray cleaning respectively), so that impurities, dust, tiny particles and other powders in the plastic particles can be completely removed, greatly improving the quality of the plastic raw materials, providing stable and suitable raw materials for plastic products, and the entire processing process has good action continuity, a short construction period and high processing efficiency.

[0143] It should be noted that the lifting mechanism, electromagnet, vibration mechanism, dust suction fan, air blowing mechanism and driving motor in the pretreatment device of the present invention are all intelligently controlled by the control system. The air volume of the dust suction fan and air blowing mechanism 6, the frequency of the vibration mechanism, and the various parameters of the soaking time can also be set by the control system.

[0144] In the above, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary and non-restrictive in nature.

[0145] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", "end", "side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0146] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0147] The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A plastic raw material pretreatment device, characterized in that: include: The chassis (1) has a debris removal section (12), a material feeding section (13) and a cleaning section (14) which are connected to each other; The impurity removal structure (2) is arranged inside the impurity removal portion (12); the impurity removal structure (2) comprises: A recovery box (21) is arranged in the impurity removal section (12), and the recovery box (21) divides the impurity removal section (12) into an impurity removal chamber (12a) and a recovery chamber (12b); A magnetic attraction plate (22) disposed in the impurity removal chamber (12a); A driving member (23) is drivingly connected to the magnetic attraction plate (22); the magnetic attraction plate (22) can be turned over under the action of the driving member (23) to place the adsorbed metal impurities into the recovery box (21); A guide plate (24) is obliquely arranged above the magnetic attraction plate (22), a material drop channel is formed between the lower end of the guide plate (24) and the inner wall of the impurity removal portion (12), and the guide plate (24) guides the material in the feed bin (11) to the magnetic attraction plate (22) through the material drop channel; A screening structure (3) arranged at the bottom of the feeding portion (13); The sieving material structure (3) comprises a first sieving material group (31) and a second sieving material group (32); the first sieving material group (31) and the second sieving material group (32) are arranged in a stepped structure; and a plurality of powder dropping openings (3111) are provided on the first sieving material group (31) and the second sieving material group (32); The vibration mechanism (4) is transmission-connected to the feeding portion (13).

2. The plastic raw material pretreatment equipment according to claim 1, characterized in that: The impurity removal structure (2) further includes: A lifting plate (25) movably disposed in the recovery chamber (12b); A lifting mechanism (26) drivingly connected to the lifting plate (25); Wherein, the recovery box (21) is arranged on the lifting plate (25), and the lifting plate (25) can move upward or downward under the drive of the lifting mechanism (26).

3. The plastic raw material pretreatment equipment according to claim 2, characterized in that: The magnetic attraction plate (22) is an electromagnetic plate, and the magnetic attraction plate (22) has magnetism when electricity is supplied, and the electromagnetic property disappears when electricity is switched off; or, An electromagnet (28) is fixed on the lifting plate (25); the recycling box (21) and the magnetic attraction plate (22) are both made of a magnetically conductive metal material; the bottom of the recycling box (21) is adsorbably connected to the electromagnet (28); when the lifting plate (25) drives the electromagnet (28) and the recycling box (21) to move upward so that the recycling box (21) and the magnetic attraction plate (22) are against each other, the electromagnet (28) can be magnetically conductive to the magnetic attraction plate (22) through the recycling box (21); when the lifting plate (25) drives the electromagnet (28) and the recycling box (21) to move downward so that the recycling box (21) is separated from the magnetic attraction plate (22), the magnetic attraction plate (22) is demagnetized.

4. The plastic raw material pretreatment equipment according to claim 3, characterized in that: A plurality of metal pillars (27) are provided on the magnetic attraction plate (22); And / or, the surface of the magnetic attraction plate (22) is gradually inclined from one end of the driving member (23) to the other end, and the material dropping channel is located above the high end of the magnetic attraction plate (22); And / or, a recovery port (121) for taking out the recovery box (21) is provided on a side wall of the recovery chamber (12b), and a door panel is movably provided on the recovery port (121); And / or, the impurity removal portion (12) and the feeding portion (13) form an L-shaped structure; And / or, the case (1) comprises an upper case body with a rectangular parallelepiped structure, the impurity removal chamber (12a) and the feeding portion (13) are formed inside the upper case body, a first mounting opening (122) is provided at the bottom of the upper case body, a recovery box with a top opening is provided at the first mounting opening (122), a recovery chamber (12b) is formed inside the recovery box, and the recovery box (21) is provided inside the recovery box.

5. The plastic raw material pretreatment equipment according to claim 1, characterized in that: The first screening material group (31) and the second screening material group (32) are arranged opposite to each other, the first screening material group (31) has a downward step structure, and the second screening material group (32) has an upward step structure; The first screening material group (31) comprises a plurality of first screening material plates (311), and the plurality of first screening material plates (311) form a downward step structure along the material travel direction; The second screening material group (32) comprises a plurality of second screening material plates (321), wherein the plurality of second screening material plates (321) form an upward step structure along the material travel direction; The side walls of two adjacent first sieve plates (311) are respectively provided with inclined surfaces (3112), and the two inclined surfaces (3112) form a first channel (33); the side walls of two adjacent second sieve plates (321) are respectively provided with inclined surfaces, and the two inclined surfaces form a second channel; the first channel (33) and the second channel are both inverted V-shaped channels; and a powder drop opening connected to the channel is provided between the inclined surfaces and the upper surfaces of the sieve plates.

6. The plastic raw material pretreatment equipment according to claim 5, characterized in that: The first screening material group (31) and the second screening material group (32) are detachably arranged in the second installation opening via a first installation seat (34) and a second installation seat (35), respectively; And / or, gaps are provided at the top ends of the first channel (33) and the second channel; And / or, a collecting bin (5) is provided at the bottom of the first sieving material group (31) and the second sieving material group (32), the collecting bin (5) is connected to a plurality of powder dropping openings (3111), and the collecting bin (5) is connected to a dust suction fan via an air duct.

7. The plastic raw material pretreatment equipment according to claim 6, characterized in that: One end of the magnetic attraction plate (22) away from the driving member (23) is butt-jointed with a material guide block (123), the material guide block (123) being located above the first mounting opening (122), and the material guide block (123) partially overlaps with the screening structure (3); The top of the recovery box forming the recovery chamber (12b) and the inner wall of the first mounting opening (122), the recovery box (21) or the partition plate form a groove, and a notch (124) communicating with the interior of the collection bin (5) is provided on one side of the groove; A blower mechanism for blowing air in the direction of the notch (124) is provided on one side of the outlet end of the feeding portion (13).

8. The plastic raw material pretreatment equipment according to any one of claims 1 to 7, characterized in that: The cleaning section (14) comprises a material discharge channel (14a), a first cleaning chamber (14b) and a second cleaning chamber (14c) which are interconnected; The upper end of the material discharge channel (14a) is connected to the outlet end of the material feeding portion (13); The bottom of the first cleaning chamber (14b) is arranged tilted, and a water inlet and a water outlet are arranged on the first cleaning chamber (14b); The second cleaning chamber (14c) is located at one side of the first cleaning chamber (14b); a filter screen (141) is provided on the second cleaning chamber (14c); the filter screen (141) separates the second cleaning chamber (14c) into a spray chamber and a drainage chamber; the spray chamber is connected to the high end of the first cleaning chamber (14b); a spray device is provided on the spray chamber; A matching first spiral feeding assembly (7) is provided at the bottom of the first cleaning chamber (14b); A second spiral feeding assembly (8) is arranged above the filter screen (141).

9. The plastic raw material pretreatment equipment according to claim 8, characterized in that: A driving mechanism (9) is arranged outside the chassis (1), and the driving mechanism (9) is drivingly connected to the first spiral feeding assembly (7). The first spiral feeding assembly (7) is driven by the driving mechanism (9) to transport the material in the first cleaning chamber (14b) to the second cleaning chamber (14c); The driving mechanism (9) comprises a driving motor (91) and a transmission shaft (92) connected to a power output end of the driving motor (91); a driven shaft (95) connected to a support column (94) is provided above the transmission shaft (92); the transmission shaft (92) and the driven shaft (95) are in driving connection; an end of the driven shaft (95) away from the support column (94) passes through a side wall of the chassis (1) and is in driving connection with a stirring shaft (98) provided in the first cleaning chamber (14b); a stirring blade is provided at the lower end of the stirring shaft (98).

10. A method for pretreating plastic raw materials, characterized in that: The method is implemented by the plastic raw material pretreatment device according to any one of claims 1 to 9, and the method comprises the following steps: Step S1, using a magnetic plate to absorb metal impurities in plastic particles, and recovering the adsorbed impurities into a recovery box; Step S2, the plastic particles are vibrated and transported to the cleaning part through the feeding part. During the vibrating feeding process, when the plastic particles pass through the screen plate with a stepped structure, the powder is discharged from the powder drop port or the powder drop port and the gap under the action of the vibration mechanism and the dust suction fan; Step S3, the plastic particles fall from the outlet end of the feeding part through the feeding channel into the first cleaning chamber for primary cleaning, and after the primary cleaning is completed, they are sent to the second cleaning chamber for secondary spray cleaning.

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