Efficient plastic particle mixing device

Abstract

The utility model discloses an efficient plastic particle mixing device which comprises a mixing barrel for conveying plastic particles to an injection molding machine, a drying barrel for conveying raw material particles to the mixing barrel, a vacuum hopper arranged at the upper end of the drying barrel, and a vacuum machine for providing vacuum suction force to the vacuum hopper and the mixing barrel. The regeneration particles and the raw material particles dried in advance by the drying barrel are simultaneously sucked in the mixing barrel by utilizing the suction force of the vacuum machine, and the second feeding hole for sucking the regeneration particles is formed in the opposite upper part of the first feeding hole, so that the regeneration particles can be scattered on the upper part of the raw material particles when falling into the mixing barrel, and cannot be accumulated at one position; and the plastic particles are dried in advance through the drying barrel, so that the plastic particles do not need to be dried again in the mixing barrel, and product performance reduction caused by excessive heating of the regenerated particles is avoided.

Description

Technical Field

[0001] The utility model relates to a plastic particle mixing device, in particular to a mixing device for recycled materials. Background Art

[0002] Plastic molding is a common production technology in the field of industrial products. When using injection molding machines to produce products, sprue materials are produced, which mainly refer to the moldings of the gates and runners outside the product, also known as the casting system condensate. From the perspective of cost saving, the sprue materials are generally recycled, crushed into particles, and mixed with new plastic particles for recycling.

[0003] The common practice at present is to collect the nozzle materials produced during molding, crush them centrally, mix them with new plastic particles and dry them, and then output them to the molding machine.

[0004] This existing method has the following problems: First, there is the risk of pollution. During transportation, it will be contaminated by dust in the environment, affecting the molding quality. Secondly, the mixing uniformity with new plastic particles. Excessive recycled particles in some areas will affect the quality of the molded products. In addition, the performance of the recycled particles that have undergone a hot melt process will be reduced due to excessive heat during the drying process.

[0005] Therefore, when recycling the nozzle material, how to ensure its application molding quality has become a problem that needs to be solved. Utility Model Content

[0006] The utility model provides a highly efficient plastic particle mixing device, which improves the pollution risk of recycled water outlet material and the mixing uniformity and drying problems with new material.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An efficient plastic granule mixing device comprises a mixing barrel for conveying plastic granules to an injection molding machine, a drying barrel for conveying raw material granules to the mixing barrel, a vacuum hopper arranged at the upper end of the drying barrel, and a vacuum machine for providing vacuum suction to the vacuum hopper and the mixing barrel;

[0009] The mixing barrel is provided with a first feed port for sucking raw material particles from the drying barrel and a second feed port for sucking regenerated particles. The second feed port is arranged opposite to the first feed port and is located above the first feed port.

[0010] Compared with the prior art, the utility model uses the suction of a vacuum machine to simultaneously suck in the recycled particles and the raw material particles that have been pre-dried in the drying barrel in the mixing barrel, and sets the second feed port for sucking in the recycled particles at a relatively upper position of the first feed port, so that when they fall into the mixing barrel, they can be scattered on the top of the raw material particles and will not accumulate in one place. At the same time, after being pre-dried in the drying barrel, the plastic particles do not need to be dried again in the mixing barrel, avoiding the degradation of product performance caused by excessive heating of the recycled particles.

[0011] However, the use of the preheated drying barrel actually provides a transfer station with enhanced suction for the transportation of the raw material particles, so that when the raw material particles and the recycled particles are sucked in at the same time, it can be ensured that the amount of raw material particles sucked in is greater than the amount of recycled particles sucked in.

[0012] In some embodiments, the second feed port extends from the feed outlet of the mixing tank to the central axis position of the mixing tank.

[0013] In some embodiments, the mixing barrel further comprises a plurality of cylindrical filters arranged in an annular shape, and the second feed port is at the feed outlet of the mixing barrel toward the cylindrical filters. The inertia of the suction force when the recycled material is fed can cause the recycled material to diffuse on the cylindrical filters, further increasing the mixing uniformity.

[0014] In some embodiments, the plastic particle mixing device further comprises a crusher for crushing the sprue material from the injection molding machine, and a regeneration material barrel for recycling the regenerated particles after crushing by the crusher, and the second feed port is connected to the regeneration material barrel. The sprue material can be directly transported from the injection molding machine to the crusher without manual centralized transportation, thereby preventing contamination during transportation.

[0015] Preferably, the drying barrel is arranged at a higher position than the regeneration barrel. When the mixing barrel sucks materials at the same time, the raw material particles at the first feed port have a smaller gravity loss than the regeneration particles at the second feed port, which can further ensure that the input amount of the raw material particles is greater than the specific gravity of the regeneration particles.

[0016] In some embodiments, the plastic particle mixing device further comprises a vacuum valve disposed between the recycling barrel and the mixing barrel.

[0017] In some embodiments, the recycled material barrel is provided with a position sensor which can sense the position of the recycled material.

[0018] Preferably, the number of the vacuum machine is 1. One vacuum machine is used to provide vacuum suction to the vacuum hopper and the mixing barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an efficient plastic particle mixing device in this case;

[0020] Figure 2 It is a schematic diagram of the mixing barrel in this case. DETAILED DESCRIPTION

[0021] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0022] Example 1, please refer to Figure 1 This invention is a high-efficiency plastic particle mixing device invented when supplying plastic particle raw materials to the injection molding machine 1 in order to recycle the sprue material 2 (mainly referring to the molded objects of the gate and runner outside the product, also called the casting system condensate) produced by the injection molding machine 1.

[0023] Raw material particles are raw materials that have not been injection molded. Plastic particles generally contain moisture due to storage or manufacturing of raw materials. If plastic with high humidity is directly molded or granulated, it is easy to cause product quality problems, such as bubbles in the product, and even lead to poor product quality. Therefore, in order to obtain better quality plastic particles, they need to be dried.

[0024] However, the recycled raw material obtained by crushing the recycled nozzle material 2 does not need to be dried again when it is recycled because it has been subjected to high-temperature injection molding. In fact, drying again may result in a decrease in product performance due to excessive heating of the recycled particles.

[0025] In this regard, the plastic particle mixing device in this case includes a mixing barrel 4 for conveying plastic particles to the injection molding machine 1, and also includes a drying barrel 5 for conveying raw material particles to the mixing barrel 4. The upper end of the drying barrel 5 is provided with a vacuum hopper 6 for sucking raw material particles. The plastic particles can be mixed particles or raw material particles. The mixed particles are particles obtained by mixing raw material particles and recycled particles. The vacuum hopper 6 and the mixing barrel 4 are both provided with a vacuum machine 7. The vacuum hopper 6 sucks the raw material particles from the raw material barrel 9 and then puts them into the drying barrel 5, while the mixing barrel 4 sucks the dried raw material particles from the drying barrel 5. Here, the setting height of the vacuum hopper 6 will not be higher than the height of the drying barrel 5, so as to avoid unnecessary waste in the selection of the rated power of the vacuum machine 7, because single-phase electric vacuum operation has the lowest cost and the lowest failure rate under such working conditions.

[0026] Preferably, the number of the vacuum machine 7 is 1. One vacuum machine 7 is used to provide vacuum suction to the vacuum hopper 6 and the mixing barrel 4, and can be turned on at different times or at the same time according to the suction demand and drying demand.

[0027] Please refer to Figure 2Specifically, the mixing barrel 4 is provided with a first feed port 41 for sucking raw material particles from the drying barrel 5 and a second feed port 42 for sucking regenerated particles, and the second feed port 42 is located above the first feed port 41. A vacuum suction port 44 is provided at the top of the mixing barrel 4, and the vacuum suction port 44 is connected to the vacuum machine 7. The second feed port 42 can suck regenerated particles from the regeneration barrel 8.

[0028] In this way, the mixing barrel 4 uses the suction force of the vacuum machine 7 to simultaneously suck in the regenerated particles and the raw material particles that have been pre-dried by the drying barrel 5, and the second feed port 42 for sucking in the regenerated particles is arranged opposite to the first feed port 41 and the second feed port 42 is located at the upper position of the first feed port 41, so that they can be scattered on the upper part of the raw material particles when falling into the mixing barrel 4.

[0029] In the process of simultaneous suction, the application of the preheated drying barrel 5 actually provides a transfer station for the transportation of raw material particles with enhanced suction. For the convenience of maintenance, the diameters of the suction pipes corresponding to the second feed port 42 and the first feed port 41 are the same in the application, and combined with the use of a single-phase electric vacuum machine 7 that is just enough to suck in plastic particles, it can be ensured that the amount of raw material particles sucked in is greater than the amount of recycled particles sucked in when the raw material particles and recycled particles are sucked in at the same time.

[0030] As a preferred solution, in some embodiments, the second feed port 42 extends from the feed outlet of the mixing barrel 4 to the central axis position of the mixing barrel 4 .

[0031] Furthermore, the mixing barrel 4 further includes a plurality of cylindrical filters 43 arranged in an annular shape, and the second feed port 42 faces at least one of the cylindrical filters 43 at the feed outlet of the mixing barrel 4, and the cylindrical filter 43 is arranged at the lower end of the vacuum suction port 44 of the mixing barrel 4. The suction force when the recycled material is fed can make the recycled material diffuse on the cylindrical filter 43, thereby further increasing the mixing uniformity.

[0032] For example, in some embodiments of the present case, the nozzle material 2 can be directly transferred from the injection molding machine 1 to the crusher 3 by the manipulator 11 for crushing to form recycled particles for direct use. The plastic particle mixing device also includes the crusher 3 and the recycled material barrel 8 for recycling the recycled particles after crushing by the crusher 3. The second feed port 42 of the mixing barrel 4 is connected to the recycled material barrel 8. The nozzle material 2 can be directly transported from the injection molding machine 1 to the crusher 3 without manual centralized transportation, and directly enters the recycled material barrel 8 and is transported to the mixing barrel 4 after crushing, which can prevent pollution during transportation.

[0033] Preferably, the drying barrel 5 is arranged at a higher position than the regeneration barrel 8. In this way, when the mixing barrel 4 simultaneously sucks materials, the raw material particles at the first feed port 41 have a smaller gravity loss than the regeneration particles at the second feed port 42, which can further ensure that the input amount of the raw material particles is greater than the specific gravity of the regeneration particles.

[0034] Example 2, please continue to refer to Figure 1 . In actual applications, the proportion of the sprue material 2 of the injection molding machine 1 is relatively low, and a portion of the recycled particles need to be accumulated before being put in. Therefore, in some embodiments, the plastic particle mixing device further includes a vacuum valve 81 disposed between the recycled material barrel 8 and the mixing barrel. At the same time, the recycled material barrel 8 is provided with a position sensor that can sense the accumulated position of the recycled particles. When the position sensor senses the position of the recycled particles, the vacuum valve 81 is opened to put in the recycled particles.

[0035] As mentioned above, this case protects a highly efficient plastic particle mixing device, and all technical solutions that are the same or similar to this case should be deemed to fall within the scope of protection of this case.

Claims

1. An efficient plastic particle mixing device, characterized in that It comprises a mixing barrel (4) for conveying plastic particles to an injection molding machine (1), a drying barrel (5) for conveying raw material particles to the mixing barrel (4), a vacuum hopper (6) arranged at the upper end of the drying barrel (5), and a vacuum machine (7) for providing vacuum suction to the vacuum hopper (6) and the mixing barrel (4); The mixing barrel (4) is provided with a first feed port (41) for sucking raw material particles from the drying barrel (5) and a second feed port (42) for sucking regenerated particles. The second feed port (42) is arranged opposite to the first feed port (41) and is located above the first feed port (41).

2. An efficient plastic particle mixing device as claimed in claim 1, characterized in that The second feed port (42) extends from the feed outlet of the mixing barrel (4) to the central axis position of the mixing barrel (4).

3. An efficient plastic particle mixing device as claimed in claim 2, characterized in that The mixing barrel (4) further comprises a plurality of cylindrical filters (43) arranged in an annular shape, and the second feed port (42) faces the cylindrical filters (43) at the feed outlet of the mixing barrel (4).

4. An efficient plastic particle mixing device as claimed in claim 1, characterized in that It also includes a crusher (3) for crushing the nozzle material (2), and a regeneration barrel (8) for recovering the regenerated particles after being crushed by the crusher (3), and the second feed port (42) is connected to the regeneration barrel (8).

5. An efficient plastic particle mixing device as claimed in claim 4, characterized in that The drying barrel (5) is arranged at a position higher than the regenerated material barrel (8).

6. An efficient plastic particle mixing device as claimed in claim 4, characterized in that It also includes a vacuum valve (81) arranged between the regeneration barrel (8) and the mixing barrel (4).

7. An efficient plastic particle mixing device as claimed in claim 6, characterized in that The regeneration material barrel (8) is provided with a position sensor.

8. An efficient plastic particle mixing device as claimed in claim 1, characterized in that The number of the vacuum machine (7) is one.

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