Preparation Equipment and Preparation Method of PE Plastic Particles for Optical Cable

Abstract

The preparation equipment and preparation method of PE plastic particles for optical wire and cable of the present application relate to the technical field of plastic particle manufacturing. It includes a machine base, on which a crushing component, a first melting component, a second melting component, a forming component, a cooling component, a cutting component and a separation component are arranged. The separation component includes a feeding cylinder, a feeding screw and a separation disk, and a heating component for heating the separation disk is also arranged on the feeding cylinder. The feeding cylinder is simultaneously communicated with the first melting driving part and the second melting component. The driving part drives the feeding screw and the separation disk to rotate, and the separation disk can separate the molten plastic and the metal particles in the molten plastic. The present application has the effect of being able to remove the metal particles in the plastic waste as much as possible, so as to avoid the situation that the extrusion port in the pushing component is blocked by the metal particles, resulting in the equipment being unable to work.

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 for PE plastic particles for optoelectronic cables. Background Art

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

[0003] The plastic pelletizer 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 crush 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. The molten plastic is then sent into 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 granules, thereby realizing the particle molding of plastic waste or raw materials.

[0004] However, in the above technology, metal waste will generally remain in the general plastic waste. In the existing technology, magnets are generally added to the crushing component to adsorb the metal particles in the plastic waste. However, the magnet adsorption can only adsorb magnetic metals and is ineffective for non-magnetic metals. In addition, when the crushed plastic and metal particles adhere to each other, the magnet may leak and fail to completely remove the metal particles, which may easily lead to the extrusion port in the pushing component being blocked, 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 pushing component and 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, which adopts the following technical solution:

[0007] The machine base has a crushing assembly for crushing plastic waste at the upper end, and the crushing assembly is provided with a feed port and a discharge port. The machine base is also provided with a first melting assembly and a second melting assembly. 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, and the other end of the first melting assembly is connected to the second melting assembly. 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;

[0008] A separation component for separating metal particles in plastics is arranged between the first melting component and the second melting component. The separation component includes a feeding cylinder and a feeding screw. The upper end of the feeding cylinder is communicated with the first melting component, the lower end of the feeding cylinder is communicated with the second melting component. The feeding screw is coaxially located in the feeding cylinder. A separation disc is coaxially and fixedly connected to the lower end of the feeding screw. A gap is left between the peripheral wall of the separation disc and the inner wall of the feeding cylinder. A driving component for driving the feeding screw to rotate is arranged on the feeding cylinder.

[0009] Optionally, the separation disc is arranged in an inverted conical shape. The centrifugal force received by the molten plastic is greater than the frictional force received, so that the molten plastic is thrown out of the separation disc and falls into the second melting component. The centrifugal force received by the metal particles is less than the frictional force received, so that the metal particles still remain in the separation disc. And the air bubbles in the molten plastic on the separation disc are easily broken under the action of the centrifugal force.

[0010] Optionally, a heating component is arranged in the separation disc. The heating component can heat the separation disc. The molten plastic on the separation disc is laid flat on the surface of the separation disc under the action of the centrifugal force, increasing the contact area between the molten plastic and the separation disc, so that the heating component can ensure that the molten plastic is in a molten state and evaporate the moisture in the molten plastic.

[0011] Optionally, a steam collection component is arranged above the separation disc. The steam collection component can adsorb water vapor in the air at high temperature. At low temperature, the water vapor attached to the steam collection component is converted into liquid and slides into the separation disc. The water in the separation disc flushes the surface of the separation disc and the inner wall of the feeding cylinder under the action of the centrifugal force.

[0012] Optionally, multiple layers of annular protrusions are arranged on the upper surface of the separation disc. On the one hand, it can increase the contact area between the molten plastic and the separation disc. On the other hand, it can increase the frictional force between the metal particles and the separation disc.

[0013] Optionally, the heating component is arranged as an electromagnetic coil. The electromagnetic coil is sleeved on the outer peripheral wall of the feeding cylinder. The electromagnetic coil can heat the feeding cylinder and the separation disc simultaneously.

[0014] Optionally, a diversion block is arranged at the connection between the feeding screw and the separation disc.

[0015] Optionally, the diversion block has magnetism.

[0016] Secondly, a preparation method of PE plastic particles for optical wire and cable provided by the present application includes the following steps:

[0017] S1: Start the device, put the waste PE plastic into the feed inlet of the crushing component, and the crushed PE plastic enters the first melting component and becomes in a molten state;

[0018] S2: The molten plastic enters the feeding cylinder and lands on the separation disk. The molten plastic falls off the separation disk. The metal particles are located inside the separation disk. The bubbles in the molten plastic are broken under the action of centrifugal force. At the same time, the heating component ensures that the plastic on the feeding cylinder and the separation disk is in a molten state and evaporates the moisture in the molten plastic;

[0019] S3: The second melting component sends the molten plastic into the molding component for molding;

[0020] S4: The cooling component cools the molded molten plastic to maintain the molded shape;

[0021] S5: The cutting component cuts the cooled plastic into pellets

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. In the present application, the mass of the molten PE plastic is relatively lighter than the mass of the metal particles in the plastic. Therefore, when the molten plastic and the metal particles land on the conical separation disk, the molten plastic with a relatively lighter mass has a smaller centrifugal force and gravity. Therefore, the separation disk provides a smaller supporting force for 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. Thus, the molten plastic is relatively more likely to overcome the frictional force it receives and move along the surface of the separation disk to the edge of the separation disk, and finally fall into the second melting component. The metal particles with a relatively heavier mass are subject to a greater gravity and centrifugal force, and the frictional force between them and the separation disk is also greater. Therefore, the centrifugal force provided by the separation disk is not sufficient 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, thus minimizing the occurrence of the situation where the metal particles enter the second melting component and block the extrusion port on the second melting component; In addition, there may be some bubbles remaining in the molten plastic, and these bubbles may cause the molten plastic to sink or be hollow during molding. When the molten plastic lands on the separation disk, both the molten plastic and the bubbles in the molten plastic are subject to centrifugal force, and the bubbles are relatively brittle and will break directly when subjected to external force, thus minimizing the occurrence of the situation where the bubbles enter the molding component and cause the molded plastic to sink or be hollow, thereby improving the quality of the product;

[0024] 2. The setting of the heating component can heat the feeding cylinder and the separation disk at the same time, so the heating component can keep the plastic in the feeding cylinder 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 inward collapse or hollowing during plastic molding, thereby further improving the quality of the product; in addition, in the present application, the molten plastic on the separation disk is subjected to centrifugal force, gravity and the supporting force exerted by the separation disk, so that the molten plastic moves from the center of the separation disk along the edge. Therefore, the molten plastic on the separation disk is spread flat 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;

[0025] 3. The steam collection component is set up to absorb the water vapor evaporated from the molten plastic and the water vapor from 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 high speed. The water on the separation disk is subjected to a huge centrifugal force, which can flush the adhering 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, thereby achieving the purpose of cleaning the equipment;

[0026] 4. Since the molten plastic falling from the feed barrel onto the separation disk is prone to splashing, the separation disk may not evaporate the moisture in the molten plastic before the molten plastic has fallen from the separation disk. Therefore, by setting the guide block, the molten plastic falling from the top of the feed 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 absorb 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.

[0027] 5. The arrangement of the multi-layer annular protrusions can, on the one hand, increase the contact area between the separation disc and the molten plastic, thereby further improving the effect of the separation disc 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 disc, thereby further minimizing the occurrence of metal particles sliding off the separation disc, and further minimizing the occurrence of metal particles clogging the extrusion port in the second melting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic diagram of the overall structure of Embodiment 1 of the present application;

[0029] Figure 2 It is a schematic diagram of the structure of the separation disk in Embodiment 1 of the present application;

[0030] Figure 3 It is a schematic diagram of the structure of the separation component in Embodiment 1 of the present application;

[0031] Figure 4 is Figure 3 the enlarged schematic diagram at position A in;

[0032] Figure 5 It is a force analysis diagram of the molten plastic on the separation disk in Embodiment 1 of the present application;

[0033] In the figure, 1 is the machine base; 2 is the crushing component; 21 is the feeding port; 22 is the discharging port; 3 is the first melting component; 31 is the melting cylinder; 32 is the feeding screw; 33 is the rotating motor; 4 is the second melting component; 5 is the forming component; 6 is the cooling component; 7 is the cutting component; 8 is the separation component; 81 is the feeding cylinder; 82 is the feeding screw; 83 is the separation disk; 831 is the annular protrusion; 832 is the diversion block; 84 is the driving part; 9 is the heating component; 10 is the steam collection component. Detailed implementation manners

[0034] The following combines the attached Figures 1-5 , and makes a further detailed description of the present application. Embodiment 1

[0035] A preparation device for PE plastic particles for optical wire and cable, referring to Figure 1 , includes the machine base 1.

[0036] 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. There is a feed port 21 on the upper end surface of the crushing component 2 and a discharge port 22 on the lower end surface of the crushing component 2. A first melting component 3 and a second melting component 4 are also arranged on the machine base 1. The structures of the first melting component 3 and the second melting component 4 are the same. The first melting component 3 is located above the second melting component 4. The first melting component 3 includes a melting cylinder 31 and a feeding screw 32. The melting cylinder 31 is fixedly arranged on the machine base 1 in the horizontal direction. The melting cylinder 31 is communicated with the discharge port 22 in the crushing component 2 through a pipeline. The feeding screw 32 is coaxially arranged inside the melting cylinder 31. One end of the feeding screw 32 extends outside the melting cylinder 31 and is coaxially fixedly connected with a rotating motor 33. The melting cylinder 31 in the second melting component 4 is communicated with the melting cylinder 31 in the first melting component 3. One end of the melting cylinder 31 in the second melting component 4 far away from the rotating motor 33 is provided with an extrusion port. The extrusion port in the second melting component 4 is successively communicated with a shaping component 5, a cooling component 6 and a cutting component 7. In this embodiment, the shaping component 5 is used to shape the molten plastic into a strip state, and the cooling component 6 cools the strip-shaped plastic so that it can be shaped. The cutting component 7 cuts the strip-shaped plastic into small granular shapes.

[0037] Refer to Figure 1 , Figure 2 and Figure 3 , a separation component 8 for separating metal particles in the molten plastic is arranged between the first melting component 3 and the second melting component 4. In this embodiment, the separation component 8 includes a feeding cylinder 81 and a feeding screw 82.

[0038] The feeding cylinder 81 is arranged vertically. One end of the melting cylinder 31 in the first melting component 3 is communicated with the peripheral wall of the feeding cylinder 81. The lower end of the feeding cylinder 81 is communicated with the peripheral wall of the melting cylinder 31 in the second melting component 4. The feeding screw 82 is coaxially located inside the feeding cylinder 81. The upper end of the feeding screw 82 extends outside the feeding cylinder 81 and is connected with a driving member 84. In this embodiment, the driving member 84 is set as a driving motor. The driving motor is installed on the upper end surface of the feeding cylinder 81, and the output shaft of the driving motor is coaxially fixedly connected with the feeding screw 82. The lower end of the feeding screw 82 is coaxially fixedly connected with a separation disc 83. There is a gap between the side wall of the separation disc 83 and the inner peripheral wall of the feeding cylinder 81. The inner diameter of a section of the feeding cylinder 81 wrapping the feeding screw 82 is smaller than the inner diameter of other parts of the feeding cylinder 81, so that the feeding screw 82 can quantitatively send the molten plastic to the separation disc 83. In this embodiment, the separation disc 83 is set as an inverted conical shape.

[0039] Refer to Figure 4 and Figure 5, when the device is started, the crushing component 2 first crushes the waste plastic into small pieces of plastic, and the small pieces of plastic then fall from the discharge port 22 on the crushing component 2 into the melting cylinder 31 in the first melting component 3. The small pieces of plastic are transformed into a molten state in the melting cylinder 31 in the first melting component 3, and the molten plastic is pushed by the feeding screw 32 in the first melting component 3 and moves into the feeding cylinder 81. Then, the feeding screw 82 in the feeding cylinder 81 quantitatively feeds the molten plastic to the upper end surface of the separation disk 83. Since the separation disk 83 in this embodiment is arranged in an inverted conical shape, the upper end surface of the separation disk 83 is an inclined surface that slopes upward. When the separation disk 83 rotates, the substances on the separation disk 83 will be subject to centrifugal force, their own gravity, the supporting force and frictional force exerted by the inclined surface of the separation disk 83. According to the formula for centrifugal force: , the formula for gravity: and the formula for frictional force: It can be known that the condition for the substances on the separation disk 83 to move from the center of the separation disk 83 to the edge is that the component of the centrifugal force parallel to the inclined surface acting on the substances is greater than the sum of the component of the gravity parallel to the inclined surface acting on the substances and the frictional force acting on the substances. Since the mass m of the substances themselves is proportional to both 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 its coefficient of friction with the separation disk 83 is much smaller than the coefficient of friction between the metal particles and the separation disk, and since the supporting force acting on the substances is determined by the centrifugal force and the gravity [[ID=1)] , and at the same time, since the mass of the metal particles per unit volume is much greater than the mass of the molten plastic per unit volume, the supporting force acting on the metal particles on the separation disk 83 is much greater than the supporting force , and according to the above friction formula, it can be known that the frictional force on the metal particles on the separation disc 83 is much greater than that of the molten plastic. Therefore, the molten plastic on the separation disc 83 can move along the inclined plane on the separation disc 83 from the center of the separation disc 83 to the edge of the separation disc 83, and until the molten plastic detaches from the separation disc 83 and falls into the melting cylinder 31 in the second melting assembly 4. The metal particles on the separation disc 83 cannot move from the center of the separation disc 83 to the edge of the separation disc 83 on the upper inclined plane of the separation disc 83 due to the relatively large frictional force. Therefore, the metal particles always remain in the separation disc 83, thus achieving the effect of removing the metal particles in the molten plastic as a whole, and further avoiding the situation that the metal particles enter the second melting assembly 4 and cause the extrusion port on the second melting assembly 4 to be blocked, ensuring the stable operation of the equipment; in addition, there may be some air bubbles remaining in the molten plastic, and these air bubbles will cause the molten plastic to be sunken or hollow during molding. When the molten plastic falls on the separation disc 83, both the molten plastic and the air bubbles in the molten plastic will be subject to centrifugal force, and the air bubbles are relatively brittle and will directly break when subjected to external force, thus avoiding the situation that the air bubbles enter the molding assembly 5 and cause the molded plastic to be sunken or hollow, and further improving the quality of the product.

[0040] Among them, referring to Figure 3 and Figure 4 , a heating assembly 9 is provided in the separation disc 83 in this embodiment. The heating assembly 9 in this embodiment is set as an electromagnetic coil. A vertical rod is provided on the machine base 1. The electromagnetic coil is sleeved on the feeding cylinder 81, and the electromagnetic coil does not contact the outer peripheral wall of the feeding cylinder 81. The electromagnetic coil is connected to an external power supply through a wire.

[0041] When the device is started, the electromagnetic coil is also energized. At this time, the electromagnetic coil can heat the separation disk 83 and the feeding cylinder 81 simultaneously. Therefore, the electromagnetic coil can keep the plastic in the feeding cylinder 81 and on the separation disk 83 in a molten state at the same time. On the one hand, it can try to ensure the normal flow of the molten plastic; on the other hand, the electromagnetic coil can heat the separation disk 83, and the separation disk 83 can heat and evaporate the water in the molten plastic on the separation disk 83, so as to avoid the water in the molten plastic entering the second melting component 4 and forming bubbles due to heat, and entering the molding component 5, resulting in indentation or hollowing during plastic molding, thereby further improving the product quality; in addition, when the separation disk 83 is in a rotating state, the molten plastic on the separation disk 83 moves from the center of the separation disk 83 to the edge due to the centrifugal force, gravity and the supporting force exerted by the separation disk 83 on it. Therefore, the molten plastic on the separation disk 83 is laid flat on the upper surface of the separation disk 83, thereby increasing the contact area between the molten plastic and the separation disk 83, and further improving the effect of the separation disk 83 in drying the water in the molten plastic; at the same time, in this embodiment, when the heated separation disk 83 evaporates the water in the molten plastic, the water in the molten plastic on the separation disk 83 first forms bubbles due to heat. When the bubbles are formed, the bubbles will burst instantly and form water vapor and float away due to the centrifugal force of the separation disk 83. Therefore, 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 water in the molten plastic on the separation disk 83, and further improve the production quality of the product.

[0042] Secondly, referring 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.

[0043] When the feeding screw 82 delivers the molten plastic onto the separation disk 83, the molten plastic drops vertically onto the separation disk 83. Therefore, the molten plastic falling on the separation disk 83 is likely to splash to the edge of the separation disk 83 and directly fall into the melting cylinder 31 in the second melting assembly 4. On the one hand, the metal particles in the molten plastic fall into the melting cylinder 31 in the second melting assembly 4 without being separated, which is likely to cause the extrusion outlet on the melting cylinder 31 in the second melting assembly 4 to be blocked. On the other hand, the moisture 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 is likely to cause the plastic to have indentations or be hollow during molding. Therefore, through the setting of the guiding block 832, it can smoothly guide the molten plastic falling from above the feeding cylinder 81 onto the separation disk 83, so that the separation disk 83 can evaporate the moisture in the molten plastic and separate the metal particles in the molten plastic. In addition, the guiding block 832 is set as a magnetic guiding block 832, which can, while guiding, preliminarily adsorb and separate the magnetic metal particles in the molten plastic, thus further minimizing the occurrence of the extrusion outlet in the second melting assembly 4 being blocked by metal particles. At the same time, the magnetic guiding 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 the metal particles falling from the separation disk 83.

[0044] It should be noted that the magnetic guiding block 832 in this embodiment is made of a high-temperature resistant material. In this embodiment, it is preferably a samarium-cobalt magnet. The working temperature of the samarium-cobalt magnet is between 250° and 350°, while the temperature required for PE plastic to reach the molten state is only 120° - 160°. Therefore, the samarium-cobalt magnet can work stably at this temperature.

[0045] In order to further prevent the metal particles from slipping out of the separation disk 83, in this embodiment, multiple layers of annular protrusions 831 are provided on the upper end surface of the separation disk 83. In this embodiment, there are three layers of annular protrusions 831, and the three layers of annular protrusions 831 are arranged coaxially 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, increasing the friction force between the metal particles in the molten plastic and the separation disk 83, and further minimizing the occurrence of the metal particles slipping out of the separation disk 83. 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 drying the moisture in the molten plastic.

[0046] To sum up, the separation disc 83 in this embodiment can not only separate the metal particles in the molten plastic when it rotates, but also can crush the bubbles in the molten plastic on the separation disc 83 to avoid the bubbles from entering the molding component 5 as much as possible, resulting in a decline in product quality; in addition, the heating component 9 can heat the separation disc 83, and the heated separation disc 83 can evaporate the moisture in the molten plastic on the separation disc 83 to further improve the production quality of the product. At the same time, the rotation of the separation disc 83 can spread the molten plastic on the separation disc 83 flat on the upper surface of the separation disc 83, thereby increasing the contact area between the separation disc 83 and the molten plastic, so as to further improve the evaporation effect of the separation disc 83 on the molten plastic, thereby ensuring the stable operation of the equipment and improving the production quality of the product as a whole.

[0047] Finally, in this embodiment, a steam collecting component 10 is provided above the separation disc 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 disc 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.

[0048] 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 adsorbed 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 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 adhering residue on the surface of the separation disc 83. 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.

[0049] 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

[0050] A preparation method of PE plastic particles for optical wire and cable, based on the preparation equipment of PE plastic particles for optical wire and cable described in Example 1, includes the following steps:

[0051] S1: Start all the drive sources in the equipment, put the waste PE plastic into the feed port 21 of the crushing component 2, and after the crushed PE plastic is crushed into smaller plastic blocks, it enters the melting cylinder 31 of the first melting component 3, and the smaller plastic blocks are heated to a molten state;

[0052] S2: The molten plastic is pushed by the feeding screw 32 in the first melting component 3 into the feeding cylinder 81, and then the molten plastic in the feeding cylinder 81 is quantitatively pushed by the feeding screw 82 onto the rotating separating disk 83. The molten plastic falls off the separating disk 83 under the action of centrifugal force. The metal particles in the molten plastic cannot break away from the separating disk 83 due to the large frictional force, so they are located inside the separating 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 plastic on the feeding cylinder 81 and the separating disk 83 is in a molten state and evaporates the moisture in the molten plastic;

[0053] S3: After being processed by the separating disk 83, the molten plastic falls into the melting cylinder 31 of the second melting component 4, and the feeding screw 32 in the second melting component 4 sends the molten plastic into the forming component 5 for forming;

[0054] S4: The cooling component 6 cools the formed molten plastic to obtain plastic with a fixed shape;

[0055] S5: The cutting component 7 cuts the cooled plastic into particles.

[0056] The plastic products produced by this process contain fewer metal impurities, and there are fewer cases of indentation or hollowing in the plastic products, which improves the production quality of this product as a whole.

[0057] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A preparation device for PE plastic particles for optical wire and cable, characterized in that, Including: A machine base (1) is provided with a crushing component (2) at the upper end for crushing plastic waste. The crushing component (2) is provided with a feeding port (21) and a discharging port (22). The machine base (1) is also provided with a first melting component (3) and a second melting component (4). The first melting component (3) and the second melting component (4) have the same structure. One end of the first melting component (3) is communicated with the discharging port (22), and the other end of the first melting component (3) is communicated with the second melting component (4). The end of the second melting component (4) far from the first melting component (3) is successively connected with a forming component (5), a cooling component (6) and a cutting component (7); A separation component (8) for separating metal particles in the plastic is arranged between the first melting component (3) and the second melting component (4). The separation component (8) includes a feeding cylinder (81) and a feeding screw (82). The upper end of the feeding cylinder (81) is communicated with the first melting component (3), and the lower end of the feeding cylinder (81) is communicated with the second melting component (4). The feeding screw (82) is coaxially located in the feeding cylinder (81). The lower end of the feeding screw (82) is coaxially fixedly connected with a separation disc (83). A gap is left between the peripheral wall of the separation disc (83) and the inner wall of the feeding cylinder (81). The feeding cylinder (81) is provided with a driving part (84) for driving the feeding screw (82) to rotate; The separation disc (83) is arranged in an inverted conical shape. The centrifugal force received by the molten plastic is greater than the frictional force received, so the molten plastic is thrown out of the separation disc (83) and falls into the second melting component (4). The centrifugal force received by the metal particles is less than the frictional force received, so the metal particles still remain in the separation disc (83). And the bubbles in the molten plastic on the separation disc (83) are easily broken under the action of the centrifugal force; A heating component (9) is arranged in the separation disc (83). The heating component (9) can heat the separation disc (83). The molten plastic on the separation disc (83) is laid flat on the surface of the separation disc (83) under the action of the centrifugal force, increasing the contact area between the molten plastic and the separation disc (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; 2. The preparation equipment for PE plastic particles used in optical wire and cable according to claim 1, characterized in that, A steam collection component (10) is arranged above the separation disc (83). The steam collection component (10) can adsorb water vapor in the air at high temperature. At low temperature, the water vapor attached to the steam collection 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 the centrifugal force; 3. The manufacturing equipment of the PE plastic particles for optical wire and cable according to claim 2, characterized in that, A plurality of layers of annular protrusions (831) are arranged on the upper surface of the separation disc (83). On the one hand, it can increase the contact area between the molten plastic and the separation disc (83), and on the other hand, it can increase the frictional force between the metal particles and the separation disc (83).

4. The manufacturing equipment for PE plastic particles used in optical wire and cable according to claim 2, characterized in that, The heating component (9) is arranged as an electromagnetic coil, and the electromagnetic coil is sleeved on the outer peripheral wall of the feeding cylinder (81), and the electromagnetic coil can heat the feeding cylinder (81) and the separation disc (83) simultaneously.

5. The manufacturing equipment of a PE plastic pellet for an optical wire and cable according to claim 1, characterized in that A flow guiding block (832) is arranged at the connection part of the feeding screw (82) and the separation disc (83).

6. The manufacturing equipment of the PE plastic particles for fiber optic cables according to claim 5, characterized in that, The flow guiding block (832) has magnetism.

7. A preparation method of PE plastic particles for optical fiber cables, based on the preparation equipment of PE plastic particles for optical fiber cables according to any one of claims 1-6, comprises the following steps: S1: Start the equipment, put the waste PE plastic into the feeding port (21) of the crushing component (2), and the crushed PE plastic enters the first melting component (3) and becomes in a molten state. S2: The molten plastic enters the feeding cylinder (81) and lands on the separation disc (83), the molten plastic falls off from the separation disc (83), the metal particles are located in the separation disc (83), and the bubbles in the molten plastic are broken under the action of centrifugal force; meanwhile, the heating component (9) ensures that the plastic on the feeding cylinder (81) and the separation disc (83) is in a molten state and evaporates the moisture in the molten plastic. S3: The second melting component (4) sends the molten plastic into the forming component (5) for forming. S4: The cooling component (6) cools the formed molten plastic to maintain the formed shape. S5: The cutting component (7) cuts the cooled plastic into particles.

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