Preparation equipment and preparation method of PE plastic particles for photoelectric cable

Abstract

The invention discloses preparation equipment and a preparation method of PE plastic particles for photoelectric cables, and relates to the technical field of plastic particle manufacturing, the preparation equipment comprises a machine base, the machine base is provided with a crushing assembly, a first melting assembly, a second melting assembly, a forming assembly, a cooling assembly, a cutting assembly and a separating assembly, and the separating assembly comprises a feeding cylinder, a feeding screw and a separating disc; and a heating assembly for heating the separation disc is further arranged on the feeding barrel, the feeding barrel communicates with the first melting driving part and the second melting assembly at the same time, the driving part drives the feeding screw and the separation disc to rotate, and the separation disc can separate molten plastic from metal particles in the molten plastic. The device has the beneficial effects that metal particles in the plastic waste can be removed as much as possible, so that the situation that equipment cannot work due to the fact that an extrusion opening in the pushing assembly is blocked by the metal particles is avoided as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of plastic particle manufacturing, and in particular to a preparation device and a preparation method of PE plastic particles for optoelectronic cables. Background Art

[0002] Plastic granule manufacturing equipment, also known as plastic granulator, is a device used to process plastic waste or raw materials into plastic granules.

[0003] The plastic granulator in the prior art mainly includes a crushing component, a melting component, a pushing component, a molding component, a cooling component and a cutting component. The crushing component is used to crush and break the plastic waste or raw materials into small particles suitable for further processing, and then heat and melt the plastic waste or raw materials into a liquid state, and then the molten plastic is sent to the molding component for molding through the pushing component, the cooling component cools the molded molten plastic, and finally the cutting component cuts the molded plastic into particles, thereby realizing the particle molding of the plastic waste or raw materials.

[0004] However, in the above technology, metal waste will generally remain in the general plastic waste. In the prior art, magnets are generally added to the crushing components to adsorb the metal particles in the plastic waste. However, the magnet adsorption can only adsorb magnetic metals, but is ineffective for non-magnetic metals. In addition, when the crushed plastic and metal particles adhere together, the magnet may leak and fail to completely remove the metal particles, which may easily lead to the blockage of the extrusion port in the pushing component, causing the equipment to be unable to work. Summary of the invention

[0005] The purpose of this application is to provide a preparation device and method for PE plastic particles for optoelectronic cables, which can remove metal particles in plastic waste as much as possible, thereby avoiding the metal particles from clogging the extrusion port in the pusher assembly, causing the equipment to be unable to work.

[0006] In the first aspect, the present application provides a device for preparing PE plastic particles for photoelectric cables using the following technical solutions: The machine base has a crushing assembly for crushing plastic waste at the upper end, a feed port and a discharge port are provided on the crushing assembly, and a first melting assembly and a second melting assembly are also provided on the machine base, the first melting assembly and the second melting assembly have the same structure, one end of the first melting assembly is connected to the discharge port, the other end of the first melting assembly is connected to the second melting assembly, and the end of the second melting assembly away from the first melting assembly is connected to the molding assembly, the cooling assembly and the cutting assembly in sequence; A separation component for separating metal particles in plastic is arranged between the first melting component and the second melting component, and the separation component includes a feeding barrel and a feeding screw. The upper end of the feeding barrel is connected with the first melting component, and the lower end of the feeding barrel is connected with the second melting component. The feeding screw is coaxially located in the feeding barrel, and the lower end of the feeding screw is coaxially fixedly connected with a separation disk. A gap is left between the peripheral wall of the separation disk and the inner wall of the feeding barrel, and a driving member for driving the feeding screw to rotate is arranged on the feeding barrel.

[0007] Optionally, the separation disk is configured to be an inverted cone, and the centrifugal force on the molten plastic is greater than the friction force, so that the molten plastic is thrown out of the separation disk and falls into the second melting component. The centrifugal force on the metal particles is less than the friction force, so that the metal particles remain in the separation disk, and the bubbles in the molten plastic on the separation disk are easily broken by the centrifugal force.

[0008] Optionally, a heating component is provided in the separation disk, and the heating component can heat the separation disk. The molten plastic on the separation disk is spread on the surface of the separation disk under the action of centrifugal force, thereby increasing the contact area between the molten plastic and the separation disk, so that the heating component can ensure that the molten plastic is in a molten state and evaporate the moisture in the molten plastic.

[0009] Optionally, a steam collecting component is provided above the separation plate, and the steam collecting component can absorb water vapor in the air at high temperature. At low temperature, the water vapor attached to the steam collecting component is converted into liquid and slides into the separation plate. The water in the separation plate flushes the surface of the separation plate and the inner wall of the feeding barrel under the action of centrifugal force.

[0010] Optionally, the upper surface of the separation disk is provided with multiple layers of annular protrusions, which can increase the contact area between the molten plastic and the separation disk on the one hand, and increase the friction between the metal particles and the separation disk on the other hand.

[0011] Optionally, the heating component is configured as an electromagnetic coil, and the electromagnetic coil is sleeved on the outer peripheral wall of the feeding cylinder, and the electromagnetic coil can heat the feeding cylinder and the separation disk simultaneously.

[0012] Optionally, a guide block is provided at the connection between the feeding screw and the separation disc.

[0013] Optionally, the guide block is magnetic.

[0014] In a second aspect, the present application provides a method for preparing PE plastic particles for photoelectric cables, comprising the following steps: S1: Start the equipment, put the waste PE plastic into the feed port of the crushing component, and the crushed PE plastic enters the first melting component and becomes molten; S2: The molten plastic enters the feeding barrel and falls on the separation disc, the molten plastic falls off the separation disc, the metal particles are located in the separation disc, and the bubbles in the molten plastic are broken by the centrifugal force; at the same time, the heating component ensures that the plastic on the feeding barrel and the separation disc is in a molten state, and evaporates the water in the molten plastic; S3: The second melting component feeds the molten plastic into the molding component for molding; S4: The cooling component cools the molten plastic after molding to maintain the molded shape; S5: The cutting component cuts the cooled plastic into particles In summary, the present application includes at least one of the following beneficial technical effects: 1. The mass of the molten PE plastic in the present application is lighter than that of the metal particles in the plastic. Therefore, when the molten plastic and the metal particles fall on the conical separation disk, the relatively lighter molten plastic has smaller centrifugal force and gravity. Therefore, the separation disk has a smaller supporting force on the molten plastic, and the friction coefficient between the molten plastic and the separation disk is smaller than the friction coefficient between the metal particles and the separation disk. Therefore, the molten plastic is easier to overcome the friction force it is subjected to than the metal particles, and moves along the surface of the separation disk to the edge of the separation disk, and finally falls into the second molten component. The relatively heavier metal particles are subjected to greater gravity and centrifugal force, and the friction between them and the separation disk is also greater. Therefore, the separation provided by the separation disk is The centrifugal force is not enough to support the metal particles to move along the surface of the separation disk. Therefore, the separation disk can separate the molten plastic and the metal particles therein, thereby avoiding the metal particles from entering the second molten component as much as possible, causing the extrusion port on the second molten component to be blocked; in addition, there may be some bubbles in the molten plastic, which will cause the molten plastic to be sunken or hollow during molding. When the molten plastic falls on the separation disk, the molten plastic and the bubbles in the molten plastic will be subjected to centrifugal force. The bubbles are relatively brittle and will be directly broken when subjected to external force, thereby avoiding the bubbles from entering the molding component as much as possible, causing the molded plastic to be sunken or hollow, thereby improving the quality of the product; 2. The setting of the heating component can heat the feeding barrel and the separation disk at the same time, so the heating component can keep the plastic in the feeding barrel and on the separation disk in a molten state at the same time to ensure the normal flow of the molten plastic; in addition, the heating component can heat the separation disk, and the separation disk can heat and evaporate the moisture in the molten plastic on the separation disk, thereby trying to avoid the moisture in the molten plastic from entering the second melting component to form bubbles, and entering the molding component, resulting in the phenomenon of indentation or hollowness during plastic molding, thereby further improving the quality of the product; in addition, the molten plastic on the separation disk in the present application is moved from the center of the separation disk to the edge due to the centrifugal force, gravity and the supporting force applied by the separation disk. Therefore, the molten plastic on the separation disk is spread on the separation disk, thereby increasing the contact area between the molten plastic and the separation disk, thereby further improving the effect of the separation disk in evaporating the moisture in the molten plastic; 3. The steam collection component is set up to absorb the water vapor evaporated in the molten plastic and the water vapor of the feeding barrel. After the work is completed, the overall temperature of the equipment drops, and the water vapor on the steam collection component condenses into water. The water flows to the separation disk, and the start-up drive drives the separation disk to rotate at a high speed. The water on the separation disk receives a great centrifugal force, so it can flush the adhered residue on the surface of the separation disk. The water has a strong momentum when it leaves the separation disk, so the water can also flush the residue on the inner wall of the feeding barrel to achieve the purpose of cleaning the equipment; 4. Since the molten plastic falling from the feeding barrel onto the separation disk is prone to splashing, the molten plastic may have fallen from the separation disk before the separation disk evaporates the moisture in the molten plastic. Therefore, by setting the guide block, the molten plastic falling from the top of the feeding barrel can be smoothly guided to the separation disk so that the separation disk can evaporate the moisture in the molten plastic; in addition, the guide block is set to be a magnetic guide block, which can adsorb the magnetic metal particles in the molten plastic while guiding the flow, thereby further avoiding the situation where the metal particles block the extrusion port in the second melting component.

[0015] 5. The arrangement of the multi-layer annular protrusions can, on the one hand, increase the contact area between the separation disk and the molten plastic, thereby further improving the effect of the separation disk in evaporating the moisture in the molten plastic; on the other hand, the arrangement of the multi-layer annular protrusions can increase the friction between the metal particles in the molten plastic and the separation disk, thereby further minimizing the occurrence of metal particles sliding off the separation disk, and further minimizing the occurrence of metal particles clogging the extrusion port in the second melting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is a schematic diagram of the structure of the separation disk in Example 1 of the present application; Figure 3 is a schematic diagram of the structure of the separation component in Example 1 of the present application; Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 is a force analysis diagram of molten plastic on the separation disk in Example 1 of the present application; In the figure, 1. base; 2. crushing component; 21. feed port; 22. discharge port; 3. first melting component; 31. melting barrel; 32. pushing screw; 33. rotating motor; 4. second melting component; 5. forming component; 6. cooling component; 7. cutting component; 8. separation component; 81. feeding barrel; 82. feeding screw; 83. separation disc; 831. annular protrusion; 832. guide block; 84. driving member; 9. heating component; 10. steam collecting component. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-5 , further details of this application are given. Example 1

[0018] A preparation device for PE plastic particles for photoelectric cables, referring to Figure 1 , including a base 1.

[0019] The machine base 1 is fixedly installed on the ground, and a crushing component 2 for crushing plastic waste is fixedly installed on the machine base 1. A feed port 21 is provided on the upper end surface of the crushing component 2, and a discharge port 22 is provided on the lower end surface of the crushing component 2. A first melting component 3 and a second melting component 4 are also provided on the machine base 1. The first melting component 3 and the second melting component 4 have the same structure. The first melting component 3 is located above the second melting component 4. The first melting component 3 includes a melting barrel 31 and a pushing screw 32. The melting barrel 31 is fixed on the machine base 1 in a horizontal direction. The melting barrel 31 is connected to the discharge port 22 in the crushing component 2 through a pipeline. The pushing screw 32 is coaxially arranged. Inside the melting barrel 31, one end of the pushing screw 32 extends to the outside of the melting barrel 31 and is coaxially fixedly connected with a rotating motor 33. The melting barrel 31 in the second melting component 4 is connected with the melting barrel 31 in the first melting component 3. The melting barrel 31 in the second melting component 4 is provided with an extrusion port at one end away from the rotating motor 33. The extrusion port in the second melting component 4 is connected with a molding component 5, a cooling component 6 and a cutting component 7 in sequence. The molding component 5 in this embodiment is used to mold the molten plastic into a long strip state, the cooling component 6 cools the long strip of plastic to facilitate its shaping, and the cutting component 7 cuts the long strip of plastic into fine particles.

[0020] Reference Figure 1 , Figure 2 and Figure 3 A separation component 8 for separating metal particles from the molten plastic is provided between the first melting component 3 and the second melting component 4 . In this embodiment, the separation component 8 includes a feeding barrel 81 and a feeding screw 82 .

[0021] The feed barrel 81 is arranged in the vertical direction, one end of the melting barrel 31 in the first melting assembly 3 is connected to the peripheral wall of the feed barrel 81, and the lower end of the feed barrel 81 is connected to the peripheral wall of the melting barrel 31 in the second melting assembly 4. The feed screw 82 is coaxially located inside the feed barrel 81, and the upper end of the feed screw 82 extends out of the feed barrel 81 and is connected to a drive member 84. The drive member 84 in this embodiment is configured as a drive motor, and the drive motor is installed at the upper end of the feed barrel 81. The output shaft of the driving motor is coaxially fixedly connected to the feeding screw 82, and the lower end of the feeding screw 82 is coaxially fixedly connected to the separation disk 83. There is a gap between the side wall of the separation disk 83 and the inner circumferential wall of the feeding barrel 81. The inner diameter of a section of the feeding barrel 81 that wraps the feeding screw 82 is smaller than the inner diameter of the other parts of the feeding barrel 81, so that the feeding screw 82 can deliver the molten plastic to the separation disk 83 in a quantitative manner. The separation disk 83 in this embodiment is configured as an inverted cone.

[0022] Reference Figure 4 and Figure 5 When the equipment is started, the crushing component 2 first crushes the waste plastic into small pieces of plastic, and the small pieces of plastic fall into the melting barrel 31 in the first melting component 3 from the discharge port 22 on the crushing component 2. The small pieces of plastic are converted into a molten state in the melting barrel 31 in the first melting component 3, and the molten plastic is pushed by the pushing screw 32 in the first melting component 3 and moves into the feeding barrel 81. Then the feeding screw 82 in the feeding barrel 81 quantitatively delivers the molten plastic to the upper end surface of the separation disc 83. Since the separation disc 83 in this embodiment is set as an inverted cone, the upper end surface of the separation disc 83 is an inclined surface inclined upward. When the separation disc 83 rotates, the material on the separation disc 83 will be subjected to centrifugal force, its own gravity, and the supporting force and friction force exerted on it by the inclined surface of the separation disc 83. According to the formula of centrifugal force: , Gravity formula: And the friction formula: It can be seen that the condition for the material on the separation disk 83 to move from the center of the separation disk 83 to the edge is that the centrifugal force on the material and the component of the force parallel to the inclined plane are greater than the sum of the gravity force on the material and the component of the force parallel to the inclined plane and the friction force on the material. Since the mass m of the material itself is proportional to the gravity and the centrifugal force, the biggest difference between the molten plastic and the metal particles in the molten plastic is that the molten plastic can be regarded as a liquid, and the friction coefficient between it and the separation disk 83 is , which is much smaller than the friction coefficient between the metal particles and the separation disk , and due to the support force of the material By centrifugal force and gravity At the same time, since the mass of metal particles per unit volume is much greater than that of molten plastic per unit volume, the supporting force on the metal particles on the separation plate 83 is It is much greater than the support force of molten plastic. Then, according to the above friction formula, it can be known that the friction force on the metal particles on the separation disk 83 is much greater than the friction force of the molten plastic. Therefore, the molten plastic on the separation disk 83 can move along the upper inclined surface of the separation disk 83 from the center of the separation disk 83 to the edge of the separation disk 83, until the molten plastic separates from the separation disk 83 and falls into the molten cylinder 31 in the second molten component 4. However, the metal particles on the separation disk 83 cannot move from the center of the separation disk 83 to the edge of the separation disk 83 on the upper end inclined surface of the separation disk 83 due to the relatively large friction force. Therefore, the metal particles are always located in the separation disk 83, thereby achieving the overall realization of the molten plastic in the separation disk 83. The metal particles are cleared away, thereby avoiding the metal particles from entering the second melting component 4 as much as possible, causing the extrusion port on the second melting component 4 to be blocked, thereby ensuring the stable operation of the equipment; in addition, some bubbles may remain in the molten plastic, and these bubbles may cause the molten plastic to collapse or become hollow during molding. When the molten plastic falls on the separation disk 83, the molten plastic and the bubbles in the molten plastic will be subjected to centrifugal force, and the bubbles are relatively brittle and will be directly broken when subjected to external force, thereby avoiding the bubbles from entering the molding component 5 as much as possible, causing the molded plastic to collapse or become hollow, thereby improving the quality of the product.

[0023] Among them, refer to Figure 3 and Figure 4 In this embodiment, a heating component 9 is arranged in the separation disk 83. The heating component 9 in this embodiment is arranged as an electromagnetic coil. A vertical rod is arranged on the machine base 1. The electromagnetic coil is sleeved on the feeding barrel 81, and the electromagnetic coil does not contact the outer peripheral wall of the feeding barrel 81. The electromagnetic coil is connected to an external power supply through a wire.

[0024] When the equipment is started, the electromagnetic coil will also be in an energized state. At this time, the electromagnetic coil can heat the separation disk 83 and the feeding barrel 81 at the same time. Therefore, the electromagnetic coil can keep the plastic in the feeding barrel 81 and on the separation disk 83 in a molten state at the same time. On the one hand, it can ensure the normal flow of the molten plastic as much as possible; on the other hand, the electromagnetic coil can heat the separation disk 83, and the separation disk 83 can heat and evaporate the moisture in the molten plastic on the separation disk 83, thereby avoiding as much as possible that the moisture in the molten plastic enters the second melting component 4 to form bubbles due to heat, and enters the molding component 5, resulting in the occurrence of inward or hollow plastic molding, thereby further improving the quality of the product; in addition, when the separation disk 83 is in a rotating state, the molten plastic on the separation disk 83 is subjected to centrifugal force, gravity and the separation disk 83. The supporting force applied to it is that the molten plastic moves from the center of the separation disk 83 along the edge. Therefore, the molten plastic on the separation disk 83 is spread flat on the upper surface of the separation disk 83, thereby increasing the contact area between the molten plastic and the separation disk 83, thereby further improving the effect of the separation disk 83 in evaporating the moisture in the molten plastic; at the same time, when the separation disk 83 in the heated state in this embodiment evaporates the moisture in the molten plastic, the moisture in the molten plastic on the separation disk 83 is first heated to form bubbles, and when the bubbles are formed, the bubbles are subjected to the centrifugal force of the separation disk 83, and the bubbles will burst at the moment of formation and form water vapor that floats away, so that the rotation of the separation disk 83 and the heating of the separation disk 83 by the electromagnetic coil can accelerate the evaporation of the moisture in the molten plastic on the separation disk 83, thereby further improving the production quality of the product.

[0025] Secondly, refer to Figure 2 and Figure 4 In order to further improve the effect of the separation component 8 in removing metal particles in the molten plastic, a magnetic guide block 832 is provided at the connection between the feeding screw 82 and the separation disk 83 in this embodiment.

[0026] Since the molten plastic falls vertically onto the separation disk 83 when the feeding screw 82 feeds the molten plastic, the molten plastic falls onto the separation disk 83 easily to splash to the edge of the separation disk 83, and then directly falls into the molten barrel 31 in the second melting component 4. On the one hand, the metal particles in the molten plastic fall into the molten barrel 31 in the second melting component 4 before being separated, which may easily cause the extrusion port on the molten barrel 31 in the second melting component 4 to be blocked; on the other hand, the water in the molten plastic has not been evaporated by the separation disk 83, and the molten plastic has already fallen from the separation disk 83, which may easily cause the plastic to be sunken or hollow during molding. Therefore, by setting the guide block 832, it can The molten plastic falling from the top of the feeding barrel 81 is smoothly guided to the separation disk 83, so that the separation disk 83 can evaporate the water in the molten plastic and separate the metal particles in the molten plastic; in addition, the guide block 832 is configured as a magnetic guide block 832, which can preliminarily adsorb and separate the magnetic metal particles in the molten plastic while guiding the plastic, thereby further avoiding the situation where the metal particles block the extrusion port in the second melting component 4 as much as possible; at the same time, the magnetic guide block 832 can also fix the magnetic metal particles in the separation disk 83, reducing the movement of the magnetic metal in the separation disk 83, thereby further reducing the probability of metal particles falling from the separation disk 83.

[0027] It should be noted that the magnetic guide block 832 in this embodiment is made of high-temperature resistant material. In this embodiment, samarium cobalt magnets are preferably used. The working temperature of samarium cobalt magnets is between 250°-350°, while the temperature required for PE plastic to reach a molten state is only 120°-160°. Therefore, samarium cobalt magnets can work stably at this temperature.

[0028] In order to further prevent the metal particles from slipping off the separation disk 83, a plurality of layers of annular protrusions 831 are provided on the upper end surface of the separation disk 83 in the present embodiment. The annular protrusions 831 in the present embodiment are provided with three layers, and the three layers of annular protrusions 831 are coaxially arranged with the separation disk 83. The annular protrusions 831 make the upper surface of the separation disk 83 rougher, thereby increasing the friction coefficient of the upper surface of the separation disk 83, thereby increasing the friction force between the metal particles in the molten plastic and the separation disk 83, thereby further preventing the metal particles from slipping off the separation disk 83 as much as possible. In addition, the annular protrusions 831 can also increase the contact area between the separation disk 83 and the molten plastic, thereby further improving the effect of the separation disk 83 in evaporating the moisture in the molten plastic.

[0029] To sum up, the separation disk 83 in this embodiment can not only separate the metal particles in the molten plastic when rotating, but also can crush the bubbles in the molten plastic on the separation disk 83 to avoid the bubbles from entering the molding component 5 as much as possible, resulting in a decrease in product quality; in addition, the heating component 9 can heat the separation disk 83, and the heated separation disk 83 can evaporate the moisture in the molten plastic on the separation disk 83 to further improve the production quality of the product. At the same time, the rotation of the separation disk 83 can spread the molten plastic on the separation disk 83 on the upper surface of the separation disk 83, thereby increasing the contact area between the separation disk 83 and the molten plastic, so as to further improve the evaporation effect of the separation disk 83 on the molten plastic, thereby ensuring the stable operation of the equipment and improving the production quality of the product as much as possible.

[0030] Finally, in this embodiment, a steam collecting component 10 is arranged above the separation disk 83. The steam collecting component 10 in this embodiment is configured as a silicone ring. The silicone ring is located in the feeding barrel 81 and is coaxially arranged with the feeding screw 82. The silicone ring is fixedly mounted on the inner wall of the narrower part of the feeding barrel 81. When the moisture in the molten plastic on the separation disk 83 is evaporated, when the water vapor rises to the silicone ring, the water vapor will be adsorbed on the surface of the silicone ring, and the water vapor existing in the feeding barrel 81 itself will also be adsorbed by the silicone ring.

[0031] When the silicone ring is at a high temperature, it can absorb water vapor in the air very well. When the equipment is finished running, the equipment stops working, and the electromagnetic coil will no longer heat the feeding barrel 81 and the separation disc 83. When the temperature in the feeding barrel 81 drops to normal temperature, the water vapor absorbed by the rubber ring will condense into water again, and then the water on the rubber ring will fall into the separation disc 83. At this time, the driving motor can be restarted, and the driving motor drives the separation disc 83 to rotate through the feeding screw 82. The water in the separation disc 83 will move from the center of the separation disc 83 to the edge under the action of centrifugal force. At this time, the rotation speed of the separation disc 83 can be increased to increase the centrifugal force exerted on the water in the separation disc 83. Therefore, when the water moves on the upper surface of the separation disc 83, it can flush the adhered residue on the surface of the separation disc 83, and the water has a strong momentum when it leaves the separation disc 83, so the water can also flush the residue on the inner wall of the feeding barrel 81 to achieve the purpose of cleaning the equipment.

[0032] It should be noted that the feed tube 81 in this embodiment is detachably connected to the melting tubes 31 in the first melting component 3 and the second melting component 4. On the one hand, when parts in the separation component 8 are damaged, the separation component 8 can be repaired or replaced. On the other hand, when too many metal particles accumulate on the separation disk 83, the feed tube 81 can be easily removed to remove and collect the metal particles on the separation disk 83. Example 2

[0033] A method for preparing PE plastic particles for photoelectric cables, based on the preparation equipment for PE plastic particles for photoelectric cables described in Example 1, comprises the following steps: S1: Start all driving sources in the equipment, put the waste PE plastic into the feed port 21 of the crushing component 2, and the crushed PE plastic is crushed into smaller plastic blocks and then enters the melting cylinder 31 in the first melting component 3, and the smaller plastic blocks are heated to become a molten state; S2: The molten plastic is pushed into the feeding barrel 81 by the pushing screw 32 in the first melting component 3, and then the molten plastic in the feeding barrel 81 is quantitatively pushed by the feeding screw 82 to the separation disk 83 in a rotating state. The molten plastic falls off from the separation disk 83 under the action of centrifugal force. The metal particles in the molten plastic cannot be separated from the separation disk 83 due to the large friction force, so they are located in the separation disk 83, and the bubbles in the molten plastic are broken under the action of centrifugal force; at the same time, the heating component 9 ensures that the plastics on the feeding barrel 81 and the separation disk 83 are in a molten state, and evaporates the water in the molten plastic; S3: After being processed by the separation disc 83, the molten plastic falls into the melting barrel 31 in the second melting component 4, and the push screw 32 in the second melting component 4 delivers the molten plastic into the molding component 5 for molding; S4: The cooling component 6 cools the molten plastic after molding to obtain plastic with a fixed shape; S5: The cutting component 7 cuts the cooled plastic into particles.

[0034] The plastic products produced by this process contain fewer metal impurities, and the plastic products are less likely to be sunken or hollow, which improves the production quality of the product as a whole.

[0035] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for preparing PE plastic particles for photoelectric cables, characterized in that: include: A machine base (1) is provided with a crushing assembly (2) for crushing plastic waste at its upper end, the crushing assembly (2) is provided with a feed port (21) and a discharge port (22), and the machine base (1) is also provided with a first melting assembly (3) and a second melting assembly (4), the first melting assembly (3) and the second melting assembly (4) having the same structure, one end of the first melting assembly (3) being connected to the discharge port (22), the other end of the first melting assembly (3) being connected to the second melting assembly (4), and the end of the second melting assembly (4) away from the first melting assembly (3) being connected in sequence to a molding assembly (5), a cooling assembly (6) and a cutting assembly (7); A separation component (8) for separating metal particles from plastic is provided between the first melting component (3) and the second melting component (4). The separation component (8) comprises a feeding barrel (81) and a feeding screw (82). The upper end of the feeding barrel (81) is connected to the first melting component (3), and the lower end of the feeding barrel (81) is connected to the second melting component (4). The feeding screw (82) is coaxially located in the feeding barrel (81). The lower end of the feeding screw (82) is coaxially fixedly connected to a separation disk (83). A gap is left between the peripheral wall of the separation disk (83) and the inner wall of the feeding barrel (81). The feeding barrel (81) is provided with a driving member (84) for driving the feeding screw (82) to rotate.

2. The preparation equipment of PE plastic particles for photoelectric cables according to claim 1, characterized in that: The separation disk (83) is configured to be in the shape of an inverted cone. The centrifugal force on the molten plastic is greater than the friction force on the molten plastic, so the molten plastic is thrown out of the separation disk (83) and falls into the second melting component (4). The centrifugal force on the metal particles is less than the friction force on the metal particles, so the metal particles remain in the separation disk (83), and the bubbles in the molten plastic on the separation disk (83) are easily broken under the action of the centrifugal force.

3. The preparation equipment of PE plastic particles for photoelectric cables according to claim 2, characterized in that: A heating component (9) is arranged in the separation disk (83), and the heating component (9) is capable of heating the separation disk (83). The molten plastic on the separation disk (83) is spread on the surface of the separation disk (83) under the action of centrifugal force, thereby increasing the contact area between the molten plastic and the separation disk (83), so that the heating component (9) can ensure that the molten plastic is in a molten state and evaporate the water in the molten plastic.

4. The preparation equipment of PE plastic particles for photoelectric cables according to claim 3, characterized in that: A steam collecting component (10) is arranged above the separation disc (83). The steam collecting component (10) is capable of absorbing water vapor in the air at high temperatures. At low temperatures, the water vapor attached to the steam collecting component (10) is converted into liquid and slides into the separation disc (83). The water in the separation disc (83) flushes the surface of the separation disc (83) and the inner wall of the feeding cylinder (81) under the action of centrifugal force.

5. The equipment for preparing PE plastic particles for photoelectric cables according to claim 3, characterized in that: The upper surface of the separation disk (83) is provided with multiple layers of annular protrusions (831), which can increase the contact area between the molten plastic and the separation disk (83) on the one hand, and increase the friction between the metal particles and the separation disk (83) on the other hand.

6. The equipment for preparing PE plastic particles for photoelectric cables according to claim 3, characterized in that: The heating component (9) is configured as an electromagnetic coil, the electromagnetic coil being sleeved on the outer peripheral wall of the feeding cylinder (81), and the electromagnetic coil being capable of heating the feeding cylinder (81) and the separation disk (83) simultaneously.

7. The equipment for preparing PE plastic particles for photoelectric cables according to claim 1, characterized in that: A guide block (832) is provided at the connection between the feeding screw (82) and the separation plate (83).

8. The equipment for preparing PE plastic particles for photoelectric cables according to claim 7, characterized in that: The guide block (832) is magnetic.

9. A method for preparing PE plastic particles for photoelectric cables, based on the preparation device for PE plastic particles for photoelectric cables according to any one of claims 1 to 8, comprising the following steps: S1: Start the equipment, put the waste PE plastic into the feed port (21) of the crushing component (2), and the crushed PE plastic enters the first melting component (3) and becomes a molten state; S2: The molten plastic enters the feeding barrel (81) and falls onto the separation disk (83), the molten plastic falls off the separation disk (83), the metal particles are located in the separation disk (83), and the bubbles in the molten plastic are broken by the centrifugal force; at the same time, the heating component (9) ensures that the plastic on the feeding barrel (81) and the separation disk (83) is in a molten state, and evaporates the water in the molten plastic; S3: the second melting component (4) feeds the molten plastic into the molding component (5) for molding; S4: A cooling component (6) cools the molten plastic after molding to maintain the molded shape; S5: The cutting component (7) cuts the cooled plastic into particles.

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