CN119427582A

CN119427582A - A preparation device and method for PE plastic particles for photoelectric cables

Info

Publication number: CN119427582A
Application number: CN202411706145.3A
Authority: CN
Inventors: 柯斌; 柯赛丙; 沈正邦
Original assignee: Hubei Kepoda Polymer Material Co ltd
Current assignee: Hubei Kepoda Polymer Material Co ltd
Priority date: 2024-11-26
Filing date: 2024-11-26
Publication date: 2025-02-14
Anticipated expiration: 2044-11-26
Also published as: CN119427582B

Abstract

The application relates to preparation equipment and a preparation method of PE plastic particles for photoelectric cables, which relate to the technical field of plastic particle manufacturing and comprise a machine base, wherein a crushing assembly, a first melting assembly, a second melting assembly, a forming assembly, a cooling assembly, a cutting assembly and a separating assembly are arranged on the machine base, the separating assembly comprises a feeding barrel, a feeding screw and a separating disc, a heating assembly for heating the separating disc is also arranged on the feeding barrel, the feeding barrel is simultaneously communicated with a first melting driving piece and a second melting assembly, the driving piece drives the feeding screw and the separating disc to rotate, and the separating disc can separate molten plastics from metal particles in the molten plastics. The application has the effect of removing the metal particles in the plastic waste as much as possible, thereby avoiding the situation that the extrusion opening in the pushing component is blocked by the metal particles as much as possible, and the equipment cannot work.

Description

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

Technical Field

The application relates to the technical field of plastic particle manufacturing, in particular to equipment and a method for preparing PE plastic particles for photoelectric cables.

Background

Plastic granule manufacturing equipment, also called plastic granule granulator, is an equipment for processing plastic waste or raw materials into plastic granules.

The plastic particle granulator in the prior art mainly comprises a crushing assembly, a melting assembly, a pushing assembly, a forming assembly, a cooling assembly and a cutting assembly, wherein the crushing assembly is used for crushing and crushing plastic waste or raw materials to form small particles suitable for further processing, then the plastic waste or raw materials are heated and melted into a liquid state, then the molten plastic is sent into the forming assembly for forming through the pushing assembly, the cooling assembly cools the formed molten plastic, and finally the formed plastic is cut into particles through the cutting assembly, so that the particle forming of the plastic waste or raw materials is realized.

However, in the above-mentioned technique, there is metal waste material in general plastics waste material, generally add magnet in crushing subassembly in prior art, adsorb the metal granule in the plastics waste material through magnet, and magnet adsorbs only can adsorb the metal that has magnetism, it is ineffective to non-magnetic metal, and when the plastics after the breakage and metal granule adhesion together, the magnet can exist and leak the condition of inhaling, and then can't reject the metal granule completely, lead to easily pushing away the extrusion mouth in the material subassembly and be blockked up, cause the equipment to carry out the condition emergence of work.

Disclosure of Invention

The application aims to provide equipment and a method for preparing PE plastic particles for a photoelectric cable, which can remove metal particles in plastic waste as much as possible, so as to avoid the situation that the equipment cannot work due to the blockage of extrusion openings in a pushing assembly by the metal particles as much as possible.

In a first aspect, the present application provides a preparation apparatus for PE plastic particles for an optical cable, which adopts the following technical scheme:

the plastic waste crushing machine comprises a machine base, wherein the upper end of the machine base is provided with a crushing assembly for crushing plastic waste, the crushing assembly is provided with a feed inlet and a discharge outlet, 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 are identical in structure, one end of the first melting assembly is communicated with the discharge outlet, the other end of the first melting assembly is communicated with the second melting assembly, and one end of the second melting assembly, which is far away from the first melting assembly, is sequentially connected with a forming assembly, a cooling assembly and a cutting assembly;

The utility model discloses a feeding device, including a feeding barrel, a feeding screw, a first melting assembly, a second melting assembly, a separation assembly, a driving piece, a separation disc, a driving piece and a driving piece, wherein the separation assembly is used for separating metal particles in plastics is arranged between the first melting assembly and the second melting assembly, the separation assembly comprises a feeding barrel and a feeding screw, the upper end of the feeding barrel is communicated with the first melting assembly, the lower end of the feeding barrel is communicated with the second melting assembly, the feeding screw is coaxially positioned in the feeding barrel, the separation disc is coaxially fixedly connected with the lower end of the feeding screw, a gap is reserved between the peripheral wall of the separation disc and the inner wall of the feeding barrel, and the driving piece is arranged on the feeding barrel and drives the feeding screw to rotate.

Optionally, the separation disc is in an inverted cone shape, the centrifugal force applied to the molten plastic is greater than the friction force applied to the separation disc, so that the molten plastic is thrown out of the separation disc and falls into the second melting assembly, the centrifugal force applied to the metal particles is less than the friction force applied to the metal particles, so that the metal particles are still in the separation disc, and bubbles in the molten plastic on the separation disc are easy to break under the action of the centrifugal force.

Optionally, be provided with heating element in the separation dish, heating element can heat the separation dish, and the molten plastic on the separation dish tiling has increased the area of contact of molten plastic and separation dish at the surface of separation dish under the effect of centrifugal force to heating element can guarantee that molten plastic is in the molten state and with the moisture evaporation in the molten plastic.

Optionally, the top of separation dish is provided with steam collection subassembly, steam collection subassembly can adsorb the vapor in the air when high temperature, and at low temperature, the vapor that adheres to on steam collection subassembly turns into liquid, and slides in the separation dish, is located water in the separation dish erodees separation dish surface and feed cylinder inner wall under the effect of centrifugal force.

Optionally, the separation disc upper surface is provided with multilayer annular protruding, on the one hand can increase the area of contact of molten plastic and separation disc, on the other hand can increase the frictional force between metal particle and the separation disc.

Optionally, the heating element sets up to solenoid, the solenoid cover is located on the periphery wall of feed cylinder, solenoid can heat feed cylinder and separation dish simultaneously.

Optionally, a guide block is arranged at the joint of the feeding screw and the separating disc.

Optionally, the flow guiding block has magnetism.

In a second aspect, the preparation method of the PE plastic particles for the photoelectric cable provided by the application comprises the following steps:

s1, starting equipment, namely placing waste PE plastic into a feed inlet in a crushing assembly, and enabling the crushed PE plastic to enter a first melting assembly and be in a molten state;

S2, enabling molten plastics to enter the feeding cylinder and fall on the separating disc, enabling the molten plastics to fall off from the separating disc, enabling metal particles to be located in the separating disc, and enabling bubbles in the molten plastics to be broken under the action of centrifugal force;

S3, the second melting assembly sends molten plastics into the forming assembly for forming;

S4, cooling the formed molten plastic by a cooling assembly to keep the formed shape;

s5, cutting the cooled plastic into particles by a cutting assembly

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

1. The mass of the molten PE plastic is lighter than that of metal particles in the plastic, so when the molten plastic and the metal particles fall on a conical separation disc, the molten plastic with lighter mass has smaller centrifugal force and gravity, so the separation disc can separate the molten plastic from the metal particles in the separation disc, the friction coefficient between the molten plastic and the separation disc is smaller than that between the metal particles and the separation disc, the molten plastic can overcome the friction force borne by the molten plastic relatively to the metal particles, the molten plastic moves to the edge of the separation disc along the surface of the separation disc, finally falls into a second melting assembly, the gravity and the centrifugal force borne by the metal particles with heavier mass are larger, the friction force between the separation disc and the separation disc is also larger, and therefore the centrifugal force provided by the separation disc is insufficient to support the metal particles to move along the surface of the separation disc;

2. The heating component is arranged and can heat the feeding cylinder and the separating disc simultaneously, so that the heating component can keep the plastics in the feeding cylinder and on the separating disc in a molten state simultaneously so as to ensure the normal flow of the molten plastics; in addition, the molten plastic on the separating disc moves along the edge from the center of the separating disc due to centrifugal force, gravity and supporting force applied by the separating disc, so that the molten plastic on the separating disc is flatly paved on the separating disc, the contact area between the molten plastic and the separating disc is increased, and the evaporating effect of the separating disc on the water in the molten plastic is further improved;

3. The steam collecting assembly is arranged, so that the steam evaporated in the molten plastic and the steam of the feeding cylinder can be absorbed, after the work is completed, the overall temperature of the equipment is reduced, the steam on the steam collecting assembly is condensed into water, the water flows onto the separating disc, the driving piece is started to drive the separating disc to rotate at a high speed, the water on the separating disc receives a great centrifugal force, adhered residues on the surface of the separating disc can be washed, and the water has strong momentum when the water is separated from the separating disc, so that the water can also wash the residues on the inner wall of the feeding cylinder, and the aim of cleaning the equipment is fulfilled;

4. Because the molten plastic falling on the separating disc from the feeding cylinder is easy to splash, the separating disc is likely to not evaporate the water in the molten plastic, and the molten plastic falls off from the separating disc, the molten plastic falling from the upper part of the feeding cylinder can be smoothly guided onto the separating disc through the arrangement of the flow guide block so that the separating disc evaporates the water in the molten plastic, and in addition, the flow guide block is provided with a magnetic flow guide block which can absorb the metal particles with magnetism in the molten plastic when guiding the flow, thereby further avoiding the occurrence of the condition that the extrusion opening in the second melting assembly is blocked by the metal particles as much as possible.

5. The arrangement of the multi-layer annular protrusions can increase the contact area of the separating disc and the molten plastic on one hand, so that the effect of evaporating moisture in the molten plastic by the separating disc is further improved, and on the other hand, the friction force between metal particles in the molten plastic and the separating disc can be increased, so that the situation that the metal particles slide out of the separating disc is further avoided as much as possible, and the situation that extrusion ports in a second molten assembly are blocked by the metal particles is further avoided as much as possible.

Drawings

FIG. 1 is a schematic view showing the overall structure of embodiment 1 of the present application;

FIG. 2 is a schematic view showing the structure of a separation disc in embodiment 1 of the present application;

FIG. 3 is a schematic view showing the structure of a separation unit in embodiment 1 of the present application;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a force analysis chart of molten plastic on a separator pan in example 1 of the present application;

in the figure, 1, a machine seat, 2, a crushing assembly, 21, a feed inlet, 22, a discharge outlet, 3, a first melting assembly, 31, a melting cylinder, 32, a pushing screw, 33, a rotating motor, 4, a second melting assembly, 5, a forming assembly, 6, a cooling assembly, 7, a cutting assembly, 8, a separating assembly, 81, a feeding cylinder, 82, a feeding screw, 83, a separating disc, 831, an annular protrusion, 832, a guide block, 84, a driving piece, 9, a heating assembly, 10 and a steam collecting assembly.

Detailed Description

The present application will be described in further detail with reference to fig. 1 to 5.

Example 1

An apparatus for preparing PE plastic particles for photoelectric cables, referring to FIG. 1, comprises a machine base 1.

The machine base 1 is fixedly arranged on the ground, the machine base 1 is fixedly provided with a crushing component 2 for crushing plastic waste, the upper end surface of the crushing component 2 is provided with a feed inlet 21, the lower end surface of the crushing component 2 is provided with a discharge outlet 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, the first melting component 3 is positioned above the second melting component 4, the first melting component 3 comprises a melting cylinder 31 and a pushing screw 32, the melting cylinder 31 is fixed on the machine base 1 along the horizontal direction, the melting cylinder 31 is communicated with the discharge outlet 22 in the crushing component 2 through a pipeline, the pushing screw 32 is coaxially arranged in the melting cylinder 31, one end of the pushing screw 32 extends out of the melting cylinder 31, and is coaxially and fixedly connected with a rotating motor 33, the melting cylinder 31 in the second melting assembly 4 is communicated with the melting cylinder 31 in the first melting assembly 3, an extrusion port is formed in one end, far away from the rotating motor 33, of the melting cylinder 31 in the second melting assembly 4, the extrusion port in the second melting assembly 4 is sequentially communicated with a forming assembly 5, a cooling assembly 6 and a cutting assembly 7, the forming assembly 5 in the embodiment is used for forming molten plastics into a long strip state, the cooling assembly 6 cools the long strip-shaped plastics so as to form the long strip-shaped plastics, and the cutting assembly 7 cuts the long strip-shaped plastics into fine particles.

Referring to fig. 1,2 and 3, a separation assembly 8 for separating metal particles in molten plastic is provided between the first melting assembly 3 and the second melting assembly 4, and the separation assembly 8 in this embodiment includes a feed cylinder 81 and a feed screw 82.

The feeding barrel 81 is arranged along the vertical direction, one end of the melting barrel 31 in the first melting assembly 3 is communicated with the peripheral wall of the feeding barrel 81, the lower end of the feeding barrel 81 is communicated with the peripheral wall of the melting barrel 31 in the second melting assembly 4, the feeding screw 82 is coaxially arranged in the feeding barrel 81, the upper end of the feeding screw 82 extends out of the feeding barrel 81 and is connected with a driving piece 84, the driving piece 84 in the embodiment is arranged as a driving motor, the driving motor is arranged on the upper end face of the feeding barrel 81, an output shaft of the driving motor is fixedly connected with the feeding screw 82 coaxially, a separation disc 83 is fixedly connected with the lower end of the feeding screw 82 coaxially, a gap is reserved between the side wall of the separation disc 83 and the inner peripheral wall of the feeding barrel 81, the inner diameter of one section of the feeding barrel 81 wrapping the feeding screw 82 is smaller than that of the feeding barrel 81 of other sections, so that the feeding screw 82 can quantitatively feed molten plastics onto the separation disc 83, and the separation disc 83 in the embodiment is arranged as an inverted cone shape.

Referring to fig. 4 and 5, when the apparatus is started, the crushing assembly 2 first crushes waste plastic into small pieces of plastic, the small pieces of plastic fall into the melting barrel 31 in the first melting assembly 3 through the discharge port 22 on the crushing assembly 2, the small pieces of plastic are converted into molten state in the melting barrel 31 in the first melting assembly 3, and the molten state of plastic is moved into the feeding barrel 81 by the pushing of the pushing screw 32 in the first melting assembly 3, and then the feeding screw 82 in the feeding barrel 81 quantitatively feeds the molten plastic to the upper end face of the separation disc 83, and since the separation disc 83 in this embodiment is provided in an inverted cone shape, the upper end face of the separation disc 83 is inclined in an upward direction, and when the separation disc 83 rotates, the material on the separation disc 83 is subjected to centrifugal force, self gravity, supporting force exerted on the separation disc 83 inclined face, and friction force according to the formula of the centrifugal force: And (3) a gravity formula: And friction formula: As can be seen, the fact that the mass on the separating disk 83 is able to move to the edge along the center of the separating disk 83 is that the force component of the mass parallel to the inclined plane is greater than the sum of the force component of the mass parallel to the inclined plane and the friction force of the mass, since the mass m of the mass itself is proportional to the gravity and the centrifugal force, the greatest difference between the molten plastic and the metal particles in the molten plastic is that the molten plastic can be considered as a liquid and the friction coefficient between the molten plastic and the separating disk 83 Is much smaller than the friction coefficient between the metal particles and the separating discAnd due to the supporting force of the substanceIs formed by centrifugal forceAnd gravity forceIs determined by the supporting force of the metal particles on the separating disk 83, since the mass of the metal particles per unit volume is much greater than the molten plastic per unit volumeIs far greater than the supporting force of the molten plasticThen, according to the above friction formula, it can be known that the friction force exerted by the metal particles on the separation disc 83 is far greater than the friction force of the molten plastic, so that the molten plastic on the separation disc 83 can move along the upper inclined surface of the separation disc 83 from the center of the separation disc 83 to the edge of the separation disc 83 until the molten plastic falls off the separation disc 83 and falls into the melting cylinder 31 in the second melting assembly 4, and 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 due to the relatively large friction force on the inclined surface of the upper end of the separation disc 83, so that the metal particles are always located in the separation disc 83, the effect of removing the metal particles in the molten plastic is achieved on the whole, the situation that the extrusion port on the second melting assembly 4 is blocked is avoided as much as possible, the stable operation of the device is ensured, and in addition, some bubbles may remain in the molten plastic, the bubbles may cause the molten plastic to sink or be hollow during molding, the molten plastic falls on the separation disc 83, the bubbles may be crushed and the bubbles in the molten plastic are prevented from falling into the second melting assembly, and the hollow plastic is prevented from entering the molding assembly as much as possible, and the quality is improved, and the product is prevented from being formed.

Referring to fig. 3 and 4, a heating element 9 is disposed in a separation disc 83 in this embodiment, the heating element 9 in this embodiment is configured as an electromagnetic coil, a stand 1 is provided with a vertical rod, the electromagnetic coil is sleeved on a feeding cylinder 81, the electromagnetic coil is not in contact with an outer peripheral wall of the feeding cylinder 81, and the electromagnetic coil is connected with an external power supply through a wire.

When the device is started, the electromagnetic coil is also in an electrified state, and the electromagnetic coil can heat the separation disc 83 and the feeding cylinder 81 at the same time, so that the electromagnetic coil can simultaneously keep the plastics in the feeding cylinder 81 and on the separation disc 83 in a molten state, and on one hand, the electromagnetic coil can ensure the normal flow of the molten plastics as much as possible; on the other hand, the electromagnetic coil can heat the separating disc 83, the separating disc 83 can heat and evaporate the water in the molten plastic on the separating disc 83, so that the water in the molten plastic enters the second melting assembly 4 to form bubbles as much as possible, and enters the forming assembly 5, so that the product quality is further improved, in addition, when the separating disc 83 is in a rotating state, the molten plastic on the separating disc 83 is firstly formed into bubbles as the molten plastic is subjected to centrifugal force, gravity and supporting force exerted by the separating disc 83 on the separating disc, the molten plastic moves along the edge at the center of the separating disc 83, therefore, the contact area of the molten plastic and the separating disc 83 is increased, the effect of evaporating the water in the molten plastic by the separating disc 83 is further improved, meanwhile, when the separating disc 83 in the heated state evaporates the water in the molten plastic as much as possible, the water in the molten plastic on the separating disc 83 is firstly formed into bubbles, and when the separating disc 83 is heated, the electromagnetic coil is heated and the separated from the water in the separating disc 83 can be instantaneously heated by the heated air bubble, so that the separated water in the separating disc 83 can be separated from the vapor formed by the heated air bubble by the electromagnetic coil 83, further improving the production quality of the product.

Next, referring to fig. 2 and 4, in order to further improve the effect of the separation assembly 8 on removing the metal particles in the molten plastic, a magnetic flow guide block 832 is provided at the junction of the feed screw 82 and the separation disc 83 in this embodiment.

Because the molten plastic is vertically dropped onto the separation plate 83 when the feeding screw 82 feeds the molten plastic onto the separation plate 83, the molten plastic dropped onto the separation plate 83 is easily splashed onto the edge of the separation plate 83, so that the molten plastic drops directly into the molten cylinder 31 in the second molten assembly 4, on the one hand, the metal particles in the molten plastic drop into the molten cylinder 31 in the second molten assembly 4 without separation, the situation that the extrusion opening on the molten cylinder 31 in the second molten assembly 4 is blocked easily occurs, on the other hand, the moisture in the molten plastic is not evaporated by the separation plate 83, the molten plastic drops from the separation plate 83, the situation that the plastic is sunk or hollow easily occurs during plastic molding is easily caused, and therefore, through the arrangement of the flow guide blocks 832, the molten plastic dropped from the upper part of the feeding cylinder 81 can be smoothly guided onto the separation plate 83, so that the separation plate 83 evaporates the moisture in the molten plastic and the metal particles in the molten plastic are separated from the separation plate 83, on the other hand, the flow guide blocks 832 are arranged to have magnetic flow guide blocks, the situation that the extrusion opening on the molten plastic 31 is blocked, the metal particles in the molten plastic can be further prevented from being absorbed by the metal particles in the first molten plastic, and the magnetic particles in the separation plate 83 can be further reduced, and the situation that the magnetic particles in the separation plate 83 can be further removed from the metal particles in the separation plate 83 is further prevented.

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

In order to further avoid the occurrence of the situation that metal particles slide out of the separation disc 83, in this embodiment, the upper end surface of the separation disc 83 is provided with a plurality of annular protrusions 831, the annular protrusions 831 in this embodiment are provided with three layers, the three layers of annular protrusions 831 are coaxially arranged with the separation disc 83, the upper surface of the separation disc 83 is roughened by the annular protrusions 831, so that the friction coefficient of the upper surface of the separation disc 83 is increased, the friction force between the metal particles in the molten plastic and the separation disc 83 is increased, the occurrence of the situation that the metal particles slide out of the separation disc 83 is further avoided as much as possible, and in addition, the contact area between the separation disc 83 and the molten plastic can be increased by the annular protrusions 831, so that the effect of evaporating moisture in the molten plastic by the separation disc 83 is further improved.

In summary, the separating disc 83 in this embodiment can separate out the metal particles in the molten plastic during rotation, and at the same time, the bubbles in the molten plastic on the separating disc 83 can be crushed to avoid the bubbles entering the forming assembly 5 as much as possible, so that the product quality is reduced, in addition, the heating assembly 9 can heat the separating disc 83, and the heated separating disc 83 can evaporate the moisture in the molten plastic on the separating disc 83, so as to further improve the product quality, and at the same time, the rotation of the separating disc 83 can spread the molten plastic on the separating disc 83 on the upper surface of the separating disc 83, so that the contact area between the separating disc 83 and the molten plastic is increased, the evaporation effect of the separating disc 83 on the molten plastic is further improved, and the stable operation of the device and the product quality are further ensured as much as possible.

Finally, the steam collecting assembly 10 is disposed above the separation disc 83 in this embodiment, the steam collecting assembly 10 in this embodiment is disposed as a silica gel ring, the silica gel ring is disposed in the feeding cylinder 81 and is coaxially disposed with the feeding screw 82, the silica gel ring is fixedly mounted on the inner wall of the narrower portion in the feeding cylinder 81, when the moisture in the molten plastic on the separation disc 83 is evaporated, the water vapor is adsorbed on the surface of the silica gel ring when the water vapor rises to the silica gel ring, and the water vapor existing in the feeding cylinder 81 is also adsorbed by the silica gel ring.

When the silicone rubber ring is in a high-temperature state, the silicone rubber ring can well adsorb water vapor in air, when the equipment is in operation, the operation in the equipment is stopped, the electromagnetic coil can not heat the feeding cylinder 81 and the separating disc 83 any more, when the temperature in the feeding cylinder 81 is reduced to a normal temperature, the adsorbed water vapor of the rubber ring can be condensed into water again, then the water on the rubber ring can fall into the separating disc 83, at the moment, the driving motor can be restarted, the separating disc 83 is driven to rotate by the driving motor through the feeding screw 82, the water in the separating disc 83 can move along the edge at the center of the separating disc 83 under the action of centrifugal force, at the moment, the rotating speed of the separating disc 83 can be increased to improve the centrifugal force born by the water in the separating disc 83, so that when the water moves on the upper surface of the separating disc 83, adhered residues on the surface of the separating disc 83 can be washed out, and when the water is separated from the separating disc 83, the water can also wash residues on the inner wall of the feeding cylinder 81, so that the aim of cleaning the equipment can be achieved.

It should be noted that, in this embodiment, the feeding barrel 81 is detachably connected with the melting barrels 31 in the first melting assembly 3 and the second melting assembly 4, on one hand, when the parts in the separating assembly 8 are damaged, the separating assembly 8 can be overhauled or replaced, and on the other hand, when too many metal particles are accumulated on the separating disc 83, the feeding barrel 81 can be conveniently detached, so as to remove and collect the metal particles on the separating disc 83.

Example 2

A method for preparing PE plastic particles for an optical cable, based on the equipment for preparing PE plastic particles for an optical cable described in example 1, comprising the steps of:

S1, starting all driving sources in the equipment, putting waste PE plastic into a feed inlet 21 in a crushing assembly 2, crushing the crushed PE plastic into small plastic blocks, and then feeding the small plastic blocks into a melting cylinder 31 in a first melting assembly 3, wherein the small plastic blocks are heated to be in a molten state;

S2, pushing molten plastic into a feeding cylinder 81 by a pushing screw 32 in a first melting assembly 3, quantitatively pushing the molten plastic in the feeding cylinder 81 onto a separation disc 83 in a rotating state by a feeding screw 82, enabling the molten plastic to fall off from the separation disc 83 under the action of centrifugal force, enabling metal particles in the molten plastic to be unable to separate from the separation disc 83 due to the fact that the metal particles are subjected to large friction force, and enabling bubbles in the molten plastic to be broken under the action of the centrifugal force, wherein at the same time, the heating assembly 9 ensures that the plastics on the feeding cylinder 81 and the separation disc 83 are in a molten state, and evaporating moisture in the molten plastic;

s3, the molten plastic after being processed by the separating disc 83 falls into a melting cylinder 31 in the second melting assembly 4, and the molten plastic is sent into a forming assembly 5 by a pushing screw 32 in the second melting assembly 4 for forming;

s4, cooling the formed molten plastic by a cooling assembly 6 to obtain plastic with a fixed shape;

S5, cutting the cooled plastic into granules by the cutting assembly 7.

The plastic product produced by the process contains less metal impurities, and the plastic product has less sagging or hollow conditions, so that the production quality of the product is improved as a whole.

The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore, all equivalent changes according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A production apparatus of PE plastic particles for an optical cable, characterized by comprising:

The plastic waste crushing machine comprises a machine base (1), wherein a crushing assembly (2) for crushing plastic waste is arranged at the upper end of the machine base, a feeding hole (21) and a discharging hole (22) are formed in the crushing assembly (2), a first melting assembly (3) and a second melting assembly (4) are further arranged on the machine base (1), the first melting assembly (3) and the second melting assembly (4) are identical in structure, one end of the first melting assembly (3) is communicated with the discharging hole (22), the other end of the first melting assembly (3) is communicated with the second melting assembly (4), and one end, far away from the first melting assembly (3), of the second melting assembly (4) is sequentially connected with a forming assembly (5), a cooling assembly (6) and a cutting assembly (7);

The utility model discloses a feeding device for a plastic material, including a feeding barrel (81), a feeding screw (82), a first melting assembly (3), a second melting assembly (4), a separating assembly (8) for separating metal particles in plastics is arranged between the first melting assembly (3) and the second melting assembly (4), the separating assembly (8) includes a feeding barrel (81) and a feeding screw (82), the upper end of the feeding barrel (81) is communicated with the first melting assembly (3), the lower end of the feeding barrel (81) is communicated with the second melting assembly (4), the feeding screw (82) is coaxially arranged in the feeding barrel (81), a separating disc (83) is coaxially fixedly connected with the lower end of the feeding screw (82), a gap is reserved between the peripheral wall of the separating disc (83) and the inner wall of the feeding barrel (81), and a driving piece (84) for driving the feeding screw (82) to rotate is arranged on the feeding barrel (81).

2. A device for the preparation of PE plastic particles for an optical cable according to claim 1, wherein the separating disc (83) is arranged in an inverted cone shape, the molten plastic is subjected to a centrifugal force greater than the friction force, and is thrown out of the separating disc (83), falls into the second melting assembly (4), the metal particles are subjected to a centrifugal force less than the friction force, and remain in the separating disc (83), and bubbles in the molten plastic on the separating disc (83) are easily broken under the action of the centrifugal force.

3. The equipment for preparing PE plastic particles for the photoelectric cable according to claim 2, wherein a heating component (9) is arranged in the separation disc (83), the heating component (9) can heat the separation disc (83), molten plastic on the separation disc (83) is paved on the surface of the separation disc (83) under the action of centrifugal force, the contact area between the molten plastic and the separation disc (83) is increased, and therefore the heating component (9) can ensure that the molten plastic is in a molten state and the moisture in the molten plastic is evaporated to dryness.

4. A device for preparing PE plastic granules for photoelectric cables according to claim 3, characterized in that a steam collecting assembly (10) is arranged above the separating disc (83), the steam collecting assembly (10) can absorb water vapor in air at high temperature, at low temperature, the water vapor attached to the steam collecting assembly (10) is converted into liquid and slides into the separating disc (83), and water in the separating disc (83) flushes the surface of the separating disc (83) and the inner wall of the feeding cylinder (81) under the action of centrifugal force.

5. A device for the preparation of PE plastic granules for optical cables according to claim 3, characterized in that the upper surface of the separating disc (83) is provided with a plurality of annular projections (831) which, on the one hand, enable an increase in the contact area of the molten plastic with the separating disc (83) and, on the other hand, enable an increase in the friction between the metal granules and the separating disc (83).

6. A device for the preparation of PE plastic granules for photoelectric cables according to claim 3, characterized in that said heating assembly (9) is provided as an electromagnetic coil which is housed on the peripheral wall of said feeding cylinder (81), said electromagnetic coil being able to heat both the feeding cylinder (81) and the separation disc (83) simultaneously.

7. The equipment for preparing PE plastic particles for photoelectric cables according to claim 1, wherein a diversion block (832) is arranged at the joint of the feeding screw (82) and the separation disc (83).

8. The apparatus for preparing PE plastic particles for optical cables according to claim 7, characterized in that the guide block (832) has magnetism.

9. A method for preparing PE plastic particles for an optical cable, based on the apparatus for preparing PE plastic particles for an optical cable according to any of claims 1 to 8, comprising the steps of:

S1, starting equipment, namely placing waste PE plastic into a feed port (21) in a crushing assembly (2), and enabling the crushed PE plastic to enter a first melting assembly (3) and be in a molten state;

S2, enabling molten plastics to enter a feeding cylinder (81) and fall on a separation disc (83), enabling the molten plastics to fall off from the separation disc (83), enabling metal particles to be located in the separation disc (83), and enabling bubbles in the molten plastics to be broken under the action of centrifugal force;

s3, the second melting assembly (4) sends molten plastics into the forming assembly (5) for forming;

s4, cooling the formed molten plastic by a cooling assembly (6) so as to keep the formed shape;

s5, cutting the cooled plastic into particles by a cutting assembly (7).