KR102536224B1 - crusher for recycling of waste plastic - Google Patents

Abstract

Waste plastic crushing apparatus according to the present invention comprises a housing having a crushing space, a driving shaft supported on the housing and rotated by a driving unit, a movable crushing unit supported on the driving shaft and positioned in the crushing space, A hopper installed on an inner circumferential surface of the housing and including a fixed crushing unit for crushing waste plastic like the movable crushing unit, and installed on one side of the housing to supply waste plastic for crushing the closed space of the housing; A pulverized waste plastic discharge unit is installed to correspond to the discharge unit installed on the other side of the housing, and selects the pulverized waste plastic and discharges the pulverized material having a particle size or less to the outside.

Description

Plastic crusher {crusher for recycling of waste plastic}

The present invention relates to a plastic crushing device, and more particularly, to a plastic crushing device capable of pulverizing plastic and sorting and discharging the pulverized plastic.

In general, since plastics are superior to metals, woods, ceramics, etc. in terms of lightness, corrosion resistance, moldability, and low cost, they are widely used as alternative materials in various products. As these plastics are applied in various fields, the amount of waste is increasing.

In the process of processing these discarded plastics, if they are landfilled, there is a problem of polluting the soil, and if they are incinerated, there is a problem of polluting the air, so recycling is actively induced and encouraged.

In order to recycle the waste plastics, thermoplastic resins such as PE, PP, PS, and PVC, which are the main materials of the waste plastics, are collected, classified, pulverized, washed, and dried, and then classified, thermal, or chemical technologies are used.

The thermal technology is a method of producing recycled products by heating and melting waste plastics and then cooling and compressing them, and the chemical technology is a method of reducing compounds to basic petroleum compounds by destroying them through chemical reactions. In any case, these methods require a process of producing plastics for recycling in the form of pellets.

Republic of Korea Patent Registration No. 10-1348241 discloses a waste plastic crushing device. The published crushing device includes a rotation shaft whose both ends are rotatably supported by left and right rotation support members provided on both sides of the housing, a rotation body mounted on the rotation shaft and rotated in a counterclockwise direction, and a radial constant on the rotation body. It consists of several replaceable blades that are detachably mounted by a fastening member to maintain a gap, and the housing is provided with the blades rotated in a counterclockwise direction so as to be close to the end of the blades to pulverize the object to be pulverized. A second blade that is detachably mounted to the lower frame by the fastening member and is replaceable is included.

As described above, the conventional waste plastic crusher has a problem in that crushed or pulverized materials are not smoothly discharged from the inside of the housing to the outside.

Korean Patent Registration No. 10-0582709 discloses a waste plastic crusher. The posted waste plastic shredder has first crushing drums and second crushing drums that pivot in parallel at a predetermined distance from each other, and a first crushing drum provided to protrude from the outer circumferential surface of the first crushing drum at predetermined intervals along a spiral direction. and a second crushing blade provided to protrude from the outer circumferential surface of the second crushing drum at predetermined intervals along a spiral direction, and provided offset from each other with the first crushing blades.

And Korean Registered Patent No. 10-0584918 discloses a shredder for waste plastic waste, and Korean Registered Patent No. 10-0789935 discloses a shear-type shredder and a shear-type crushing method.

As described above, the conventional crusher has a problem in that it must be crushed again after separating to match the set particle size of the crushing, and since the discharge is not smoothly performed at the same time as the crushing, there is a separate separate method for discharging the separately crushed crushed waste plastic. There is a problem in that a discharge device is required.

Republic of Korea Patent No. 10-1348241 Republic of Korea Patent No. 10-0584918 Republic of Korea Patent No. 10-0584918 Korean Registered Patent No. 10-0789935

The present invention has been made to solve the problems described above, and an object of the present invention is to provide a waste plastic pulverizer capable of pulverizing waste plastic and discharging the pulverized waste plastic to the outside.

Another object of the present invention is to provide a waste plastic crushing device capable of sorting the particle size of pulverized material for discharge in the process of crushing waste plastic.

Waste plastic crushing device of the present invention for solving the above technical problem is a housing having a crushing space, a driving shaft supported by the housing and rotated by a driving unit, and a plurality of movable shafts supported by the driving shaft and positioned in the crushing space. A crushing unit and a fixed crushing unit installed on the inner circumferential surface of the housing of the crushing space to crush waste plastics like the movable crushing unit,

A hopper installed on one side of the housing to supply waste plastic for crushing of the closed space of the housing and a discharge unit installed on the other side of the housing are installed to correspond to each other and sort the waste plastic pulverized by the crushing unit. It is characterized in that it is provided with a pulverized waste plastic discharge unit that discharges pulverized materials having a set particle size or less to the outside.

In the present invention, the movable shredding unit for shredding the waste plastic includes a disk member installed to be stacked in the axial direction of the drive shaft, and a movable cutter or hammer installed at a predetermined angular interval on the outer circumferential surface of the disk member. include

The fixed crushing unit installed in the housing includes fixed brackets installed in the crushing space of the housing and fixed cutters installed on the fixed brackets to crush the waste plastic while intersecting with the movable cutter.

On the other hand, the pulverized waste plastic discharge unit is capable of sorting and discharging pulverized waste plastics to the outside by a movable crushing unit rotated by a drive shaft and a fixed crushing unit installed in a housing, and is coupled with the housing to create a crushing space. A partitioning sub-housing, a particle sizing network whose edge is fixed to the junction between the sub-housing and the housing, and a particle sizing network adjacent to the particle sizing network and supported and rotated by a driving shaft located inside the sub-housing, through the particle sizing network It includes an impeller for discharging the pulverized waste plastic introduced into the sub-housing through a discharge unit.

The waste plastic pulverizer according to the present invention not only pulverizes waste plastics for treatment, but also selects and discharges the pulverized waste plastics, so that the particle size of the pulverized and discharged waste plastics can be made uniform.

In addition, since the waste plastic pulverizer according to the present invention does not require the installation of a separate particle size sorting device and a discharge device, it is easy to implement a waste plastic pulverization device.

1 is an exploded perspective view of a waste plastic crusher according to the present invention;
Figure 2 is a cross-sectional view showing a molded product to be crushed and molded of waste plastic shown in Figure 1;
3 is a cross-sectional view showing a state in which pulverized waste plastic is discharged by the pulverized waste plastic discharging unit according to the present invention.

The waste plastic pulverizer according to the present invention is capable of pulverizing waste plastics and sorting out the particles of the pulverized waste plastics and discharging them, and an embodiment thereof is shown in FIGS. 1 to 3 .

Referring to the drawings, the waste plastic crushing device 10 according to the present invention includes a housing 20 having a crushing space 22, and a driving shaft supported by the housing 20 and rotated by a driving unit (not shown). 11), and the driving shaft 11 includes a plurality of movable crushing units 30 positioned in the crushing space. And a pulverized waste plastic discharge unit 40 installed to correspond to the discharge unit installed on the other side of the housing 20, sorting out the pulverized waste plastic by the shredding unit and discharging the pulverized material having a particle size smaller than a set value to the outside. do.

The waste plastic crusher according to the present invention configured as described above will be described in detail for each component as follows.

The housing 20 of the waste plastic crushing device 10 has a housing main body 21 in which a pulverizing space 22 is formed in the longitudinal direction, and is combined with the housing main body 21 to form a pulverizing space 22 It includes a housing cover 25 partitioning. A hopper 23 for inserting waste plastic for pulverization into the pulverization space 22 is installed in the housing main body 21, and the hopper 23 for inserting waste plastic for pulverization into the housing cover 25 is used to store waste plastics after pulverization and particle size screening. Discharge A discharge port 26 is formed. Further, bearing parts 24 and 27 for supporting the driving shaft 11 are provided at the end side of the housing body part 21 and at the end of the housing cover 25 . The bearing parts 24 and 27 support both sides of the drive shaft 11 . Power is transmitted to one side of the drive shaft 11 protruding to one side of the shaft part 24, 27 by the drive unit. The drive unit may be connected by a power transmission unit that connects a motor, a rotation shaft of the motor, and a drive shaft, that is, pulleys and belts, and sprockets and chains.

In addition, the movable shredding unit 30 is installed on the driving shaft 11 to crush waste plastic flowing into the crushing space through the hopper 23, and is installed on the driving shaft 11, and includes a plurality of disks ( 31) and movable cutter units 33 formed by installing first cutters 32 installed at predetermined intervals on the outer circumferential surface of the disk 31. The arrangement direction of the first cutter 32 of the movable cutter units 33 stacked in the axial direction on the driving shaft 11 forms a spiral so that the waste plastic can be moved toward the discharge port while the waste plastic is damaged. do.

Meanwhile, a fixed crushing unit 35 may be further provided on the inner circumferential surface of the crushing space 22 of the housing body 21 . The fixed crushing unit 35 may be formed of projections of a predetermined pattern on the inner circumferential surface of the housing main body 21 . However, it is not limited to this, and second cutters (not shown) may be formed in a predetermined pattern on the inner circumferential surface of the housing body so as to crush the waste plastic while intersecting with the first cutter 32 of the movable cutter unit 33. there is.

The pulverized plastic discharging unit 40 of the waste plastic pulverizer reduces the pulverized waste plastics, which have been pulverized by the movable crushing unit 30 and the fixed crushing unit 35 installed inside the housing body 21, to a particle size below a set level. By separating, the particle size separator 41 supported at the joint between the housing body 21 and the housing cover 25, and the pulverized waste plastic for discharging the pulverized plastic separated by the particle size separator 41 It includes a discharge part (45). The particle size separator 41 includes a separator plate 42 having a plurality of sorting holes 43 having a set particle size. A penetrating portion through which the driving shaft 11 passes is formed in the central portion of the separating plate 42 . An outer edge of the separation plate 42 is supported by a coupling portion between the housing body 21 and the housing cover 25 . The particle size separator 41 moves the pulverized waste plastic to the movable cutter unit 33 corresponding to the separator 42 so that the pulverized plastic can be smoothly discharged to the sorting hole 43 of the separator 42. Feathers 44 may be further provided. The pulverized plastic moving blade 44 performs a distributing function so that the pulverized plastic crushed and moved by the movable crushing unit 31 can be smoothly discharged to the sorting hole 43 of the separation plate 42, and the It has a function of secondary crushing the waste plastic of a size that did not pass through the sorting hole 43. The pulverized waste plastic moving blade 44 is not limited to the above-described embodiment, and a separate pulverized waste plastic moving blade 44 may be installed on the drive shaft 11 . In this case, the pulverized waste plastic moving feathers 44 may include a plurality of auxiliary pulverizing blades (not shown).

The pulverized waste plastic discharge unit 45 is capable of discharging the pulverized waste plastics that have passed through the sorting hole 43 of the separation plate 42 through the discharge unit. It includes a discharge impeller 46 installed on the drive shaft 11 on the rear side of the plate 42. The discharge impeller 46 includes a disk-shaped body portion 47 and a plurality of discharge blades 48 on the front surface of the body portion 47 corresponding to the separating plate 42 in the radial direction. The discharge blade 48 provides a discharge force by using the centrifugal force applied to the crushed waste plastics. The discharge blade 48 may be formed to have a predetermined curvature in a direction opposite to the rotational direction of the driving shaft, and a cutting blade for crushing may be formed at an end of the discharge blade 48. In addition, impact protrusions 49 for applying impact energy to the pulverized waste plastics may be formed on the discharge blade 48.

Waste plastic crushing device 10 according to the present invention configured as described above puts waste plastic for crushing into a hopper in a state in which the driving shaft is rotated at high speed using a drive unit. As such, the waste plastic put into the hopper flows into the crushing space 22 of the housing main body 21 and is crushed by the movable crushing unit 31 and the fixed crushing unit 35 . During the crushing process, the first cutter 32 of the movable shredding unit is spirally arranged to move the pulverized plastic particles to the separating plate 42, so it moves toward the dividing plate 42 of the particle size separator. Then, the pulverized waste plastic of the set particle size passes through the sorting hole 43 of the partition plate 42 . At this time, since the pulverized waste plastic moving feather 44 is formed on the side corresponding to the partition plate 42, the pulverized waste plastic is scattered by the pulverized waste plastic moving feather 44 and passes through the sorting hole 43. do. In this process, waste plastics that do not pass through the screening hole 43 are re-ground.

The waste plastic that has passed through the sorting hole 43 is discharged through the discharge port 26 as centrifugal force is applied by the discharge impeller 46 of the pulverized waste plastic discharge unit 45 . In particular, since impact protrusions 49 are formed on the discharge blade 48 of the discharge impeller 46, energy for discharge can be applied to the discharged waste plastic.

As described above, the waste plastic pulverizer according to the present invention pulverizes the waste plastic and can select the particle size set by the particle size separator before discharging the waste plastic, thereby increasing the reliability of pulverizing and discharging the waste plastic. In addition, there is no need to provide a separate means for moving the pulverized waste plastic as in the prior art.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached registered claims.

Claims (5)

A housing 20 having a crushing space, a driving shaft 11 supported by the housing 20 and rotated by a driving unit, and a movable crushing unit supported by the driving shaft 11 and positioned in the crushing space 22 ( 30) and a fixed crushing unit 35 installed on the inner circumferential surface of the housing 20 of the crushing space 22 to crush waste plastic like the movable crushing unit 30,
A hopper 23 installed on one side of the housing 20 to supply waste plastic for pulverization of the closed space of the housing 20, and a hopper 23 installed on the other side of the housing 20 to select and set the pulverized waste plastic Equipped with a pulverized waste plastic discharge unit 40 for discharging pulverized materials having a particle size or smaller through a discharge port 26,
The movable shredding unit 30 for shredding waste plastic has disk members 31 installed so as to be stacked in the axial direction of the drive shaft 11, and is spaced at a predetermined angle on the outer circumferential surface of each disk member 31. Including a first cutter 32 to be installed,
The pulverized waste plastic discharge unit 40 separates the pulverized waste plastic, which has been pulverized by the movable crushing unit 30 and the fixed crushing unit 35 installed inside the housing 20, to a set particle size or less, and the housing ( 20) of the housing main body 21 and the housing cover 25 and the particle size separation unit 41 supported at the joint portion, and the pulverized waste plastic for discharging the pulverized waste plastic separated by the particle size separation unit 41 It includes a discharge part 45,
The pulverized waste plastic discharge unit 45 can discharge the pulverized waste plastics that have passed through the particle size separator 41 supported by the housing 20 through the discharge port 26, It includes a discharge impeller 46 installed on the drive shaft inside,
The discharge impeller 46 has a disc-shaped body portion 47 and a plurality of discharge blades 48 in the radial direction on the front surface of the body portion 47 corresponding to the separation plate 42 of the particle size separator 41 A crushing device for waste plastic, characterized in that impact protrusions 49 are formed on the discharge feathers 48. delete delete According to claim 1,
The particle size separator 41 includes a separator plate 42 formed with a plurality of sorting holes 43 having a set particle size,
The particle size separator 41 is a sorting hole of the separation plate 42, and the movable cutter unit 33 corresponding to the separation plate 42 further includes a pulverized plastic moving blade 44 so that the pulverized plastic can be smoothly discharged. A crushing device for waste plastic, characterized in that provided.







delete

Images