Coating film removal apparatus

Abstract

To provide a coating film removal apparatus capable of automatically and effectively suppressing adhesion of resin material inside the apparatus.SOLUTION: The coating film removal apparatus of the present invention comprises a coating film grinding unit 8 for grinding a coating film included in an outer surface of a pulverized resin material 2, and a discharge unit 9 for discharging the resin material 2 in which the coating film has been ground. The discharge unit 9 comprises a discharge port 20, a resistance lid 21 capable of closing the discharge port 20, a first temperature sensor 23 for measuring a surface temperature of the resin material 2 without contact, and a lid driving device 25 for driving the resistance lid 21 to increase an opening degree of the resistance lid 21 at the discharge port 20 when the surface temperature exceeds a specific threshold.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a paint film stripping device. [Background technology]

[0002] In recent years, there has been a strong demand for recycling used resin materials. When the resin material to be recycled is painted, it is necessary to remove the paint film adhering to the surface of the resin material.

[0003] For example, Patent Document 1 below proposes a resin coating peeling device. The device includes a peeling tube and a peeling roll disposed inside the peeling tube. The peeling roll is disposed so as to form a gap with the inner peripheral surface of the peeling tube. The device is said to be able to grind the resin coating by rotating the peeling roll with a resin material supplied between the peeling tube and the peeling roll. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-179603 Summary of the Invention [Problem to be solved by the invention]

[0005] In a coating film removal device such as that described in Patent Document 1, it is desirable to operate the device at a relatively high internal temperature in order to efficiently grind the resin coating. However, if the resin material being ground inside the device exceeds a certain temperature (e.g., 120 to 130°C), it will soften more than necessary, and in the worst case, the crushed pieces of resin may stick together like tar. If such sticking of the resin material occurs, the device must be shut down, and recovery requires a great deal of effort. Moreover, since such sticking of the resin material tends to progress rapidly when the temperature exceeds a certain temperature, the operator must frequently monitor the inside of the device, which places a significant burden on the operator.

[0006] The present invention has been devised in view of the above-described circumstances, and its main object is to provide a coating film removing device that can automatically and effectively prevent resin material from adhering inside the device. [Means for solving the problem]

[0007] The first invention is a coating film removing device that includes a coating film grinding unit that grinds off a coating film adhering to the surface of crushed resin material, and a discharge unit having an outlet that discharges the resin material from which the coating film has been ground off from the coating film grinding unit, wherein the discharge unit includes a resistive lid that can change the opening degree of the outlet by driving it to open and close relative to the outlet, a first temperature sensor that can measure the surface temperature of the resin material non-contact, and a lid driving device that drives the resistive lid to increase the opening degree of the outlet when the surface temperature exceeds a specific threshold.

[0008] A second invention is characterized in that, in the first invention, the lid driving device includes an air cylinder that drives the resistance lid.

[0009] The third invention is characterized in that, in the first or second invention, it includes a drive motor that drives the coating film grinding unit, and a motor control unit that reduces the operating current of the drive motor when the temperature measured by the first temperature sensor exceeds a specific threshold value.

[0010] The fourth invention is characterized in that, in the first or second invention, it includes an air blowing unit capable of blowing air to the coating film grinding unit, and an air blowing control unit that operates the air blowing unit when the temperature measured by the first temperature sensor exceeds a specific threshold value.

[0011] A fifth invention is characterized in that, in the first or second invention, the first temperature sensor is provided above the ejection port.

[0012] A sixth invention is characterized in that, in the fifth invention, the first temperature sensor includes an emission surface that emits infrared rays for temperature measurement, and the discharge portion includes an air blower that can clean the emission surface.

[0013] The seventh invention is characterized in that, in the first or second invention, it includes a second temperature sensor capable of measuring the surface temperature of the resin material upstream of the coating film grinding section, and the lid driving device drives the resistance lid taking into account the temperature measured by the second temperature sensor. [Effects of the Invention]

[0014] The first invention includes a lid drive device that moves the resistive lid to increase the opening of the discharge port when the surface temperature of the resin material measured by the first temperature sensor exceeds a specific threshold. This increase in opening reduces the compressive force acting on the resin material inside the coating grinding unit. This reduces the amount of heat generated by friction when the resin coating is ground and by friction between the resin materials, thereby lowering the temperature of the resin material itself and preventing the resin material from sticking. This action automatically and effectively prevents the resin material from sticking inside the device.

[0015] Generally, air cylinders have a higher operating speed than electric cylinders, but in the second invention, the lid drive device includes an air cylinder that drives the resistance lid, which increases the operating speed of the resistance lid and more reliably prevents the resin material from adhering.

[0016] The third invention includes a motor control unit that reduces the operating current of the drive motor when the temperature measured by the first temperature sensor exceeds a specific threshold, thereby making it possible to more reliably suppress adhesion of the resin material.

[0017] In the fourth aspect of the invention, since the air blowing section and the air blowing control section are included, the temperature of the coating film grinding section can be actively lowered as needed.

[0018] In the fifth aspect of the present invention, the first temperature sensor is provided above the discharge port, so that it is possible to prevent fine resin material discharged from the discharge port from adhering to the first temperature sensor and reducing its measurement accuracy.

[0019] In the sixth invention, in the fifth invention, the discharge section includes an air blower that can clean the emission surface of the first temperature sensor, so that the emission surface can be kept clean, and the measurement accuracy of the first temperature sensor can be more reliably prevented from decreasing.

[0020] In the seventh invention, a second temperature sensor capable of measuring the surface temperature of the resin material upstream of the coating film grinding section is included, and the lid driving device drives the resistance lid based on the measurement results of the second temperature sensor, so that the device can be controlled with greater accuracy. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a schematic diagram of a coating film removing device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing a control unit of the coating film peeling device of FIG. [Figure 3] FIG. 2 is a perspective view showing a peeling roll and a peeling cylinder in FIG. [Figure 4] FIG. 2 is an enlarged view of the discharge portion of FIG. [Figure 5] FIG. 2 is an enlarged view of the discharge portion of FIG. [Figure 6] FIG. [Figure 7] 4 is a graph showing the measurement results of a first temperature sensor. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings are intended to illustrate the features of the present invention, but may include exaggerated representations and representations that differ from the dimensional ratios of the actual structure to facilitate understanding of the present invention. Furthermore, identical or common elements are designated by the same reference numerals throughout the embodiments, and redundant explanations will be omitted. Furthermore, the specific configurations shown in the embodiments and drawings are intended to facilitate understanding of the present invention, and the present invention is not limited to the specific configurations shown in the drawings. Furthermore, well-known configurations may be adopted as appropriate for configurations not described in this specification.

[0023] FIG. 1 shows a schematic diagram of a paint film removing device (hereinafter, sometimes simply referred to as "device") 1 of this embodiment. As shown in FIG. 1, device 1 is a device that grinds and removes paint contained on the outer surface of pulverized resin material 2. The resin material 2 is assumed to be, for example, a pulverized resin molded product (e.g., a bumper) used in the body of a vehicle. An example of the material of the resin molded product is polypropylene. However, the present invention is not limited to this embodiment.

[0024] The resin material 2 is obtained by pulverizing the resin molded product using, for example, a pulverizer such as a hammer mill (not included in the apparatus 1 of the present invention) (not shown). The size of the pulverized pieces 2a of the resin material 2 is not particularly limited as long as it does not clog the passages for the resin material 2 within the apparatus 1 (particularly the supply valve 6b described below). As an example, in this embodiment, each pulverized piece 2a of the resin material 2 has a maximum thickness of 4 mm or less and a maximum diameter of 15 mm or less. The volume weight of the pulverized pieces 2a is preferably in the range of 400 to 600 g / liter. The angle of repose of the pulverized resin material 2 is preferably 45 to 65°.

[0025] The crushed pieces 2a have a coating film of acrylic resin or polyurethane resin adhering thereto as a surface coating film of the resin molding. The thickness of the coating film is, for example, in the range of 80 μm to 180 μm. By passing the resin material 2 through the device 1, the coating film is ground off by the operation described below. If the coating film is not sufficiently ground off in one pass, the resin material 2 may be passed through the device 1 multiple times. In this case, various modes may be adopted, such as a method in which the resin material 2 is passed through one device 1 multiple times, or a method in which the resin material 2 is passed through an array of multiple devices 1.

[0026] FIG. 2 is a block diagram conceptually illustrating the control unit 5 of the device 1. The control unit 5 can control various operations of the device 1. The control unit 5 includes, for example, a memory unit 51, an input unit 52, a display unit 53, a data acquisition unit 54, and a processing unit 55. The memory unit 51 stores various programs and various data. The input unit 52 accepts input operations from an operator. The display unit 53 displays the status of the device to the operator. The data acquisition unit 54 receives data from various sensors, etc. The processing unit 55 determines the processing content based on information from the input unit 52 and the data acquisition unit 54. The control unit 5 can realize the operations described below using the above configurations (all of which are well known and will not be described in detail). However, the present invention is not limited to these configurations.

[0027] As shown in FIG. 1, the apparatus 1 of this embodiment includes, for example, a supply unit 6 and an apparatus main body 7. The supply unit 6 supplies pulverized resin material 2 downstream. The supply unit 6 includes, for example, a hopper 6a that stores the pulverized resin material 2, and a supply valve 6b that supplies the resin material 2 to the apparatus main body 7 according to the status of the apparatus. The supply valve 6b can supply the resin material 2 intermittently or continuously depending on its operation. In this embodiment, a rotary valve is used as the supply valve 6b, but the present invention is not limited to this embodiment.

[0028] The device body 7 receives the resin material 2 from the supply unit 6, grinds the coating film on the resin material 2, and then discharges the resin material 2 from which the coating film has been ground (see arrow A1). To achieve this operation, the device body 7 includes at least a coating film grinding unit 8 and a discharge unit 9. Furthermore, the device 1 of this embodiment is provided with a resin material feed unit 10 upstream of the coating film grinding unit 8.

[0029] The resin material feed section 10 includes, for example, a screw shaft 12 that is rotated by a drive motor 11. The resin material feed section 10 can move the resin material 2 to the coating film grinding section 8 by the rotation of the screw shaft 12. Furthermore, when the resin material feed section 10 and the coating film grinding section 8 are sufficiently filled with the resin material 2 (not shown), the rotation of the screw shaft 12 applies a compressive force to the filled resin material 2.

[0030] The coating film grinding unit 8 grinds the coating film contained on the outer surface of the pulverized resin material 2. In this embodiment, the coating film grinding unit 8 includes, for example, a peeling roll 15 and a peeling tube 16. The peeling roll 15 is connected to, for example, the screw shaft 12 of the resin material feed unit 10, and these are rotated integrally by a drive motor 11. In this embodiment, the operating current of the drive motor 11 is adjusted according to the state of the device 1, and thus the rotational state (rotation speed and torque) of the peeling roll 15 and the screw shaft 12 is adjusted. In another embodiment, the screw shaft 12 and the peeling roll 15 may be operated by different power sources.

[0031] Fig. 3 is a perspective view showing an outline of the peeling roll 15 and the peeling tube 16. As shown in Fig. 3, the peeling roll 15 has ridges 15a that protrude from its outer circumferential surface and extend in the axial direction of the peeling roll 15. The peeling tube 16 is, for example, a cylindrical body with a hexagonal cross section, and is arranged to surround the periphery of the peeling roll 15. The peeling tube 16 and the peeling roll 15 are arranged so that a gap 17 is formed between them, allowing the resin material 2 (shown in Fig. 1, and the same applies hereinafter) to enter.

[0032] The peeling tube 16 has a mesh plate 16b for grinding off the coating film contained in the resin material 2. In Fig. 3, the mesh plate 16b is dotted, and the specific shape is omitted. The inner surface of the mesh plate 16b has projections and depressions that allow the coating film of the resin material 2 to be ground off, and also has through holes that allow the ground off coating film to be discharged to the outside of the peeling tube 16.

[0033] In the coating film grinding section 8, the resin material 2 is filled between the peeling tube 16 and the peeling roll 15, and as the peeling roll 15 rotates, the resin material 2 is rubbed against the mesh plate 16b, thereby grinding the coating film of the resin material 2. As shown in Fig. 1, the ground coating film is discharged below the peeling tube 16 (see arrow A2) and is transported appropriately by a known transport device or the like (not shown).

[0034] Fig. 4 shows an enlarged view of the discharge unit 9. In Fig. 4, the flow of the resin material 2 is conceptually indicated by arrow A3. As shown in Fig. 4, the discharge unit 9 can discharge the resin material 2 from which the coating film has been ground. The discharge unit 9 includes a discharge port 20 and a resistance cover 21.

[0035] The ground resin material 2 is discharged from the discharge port 20 and stored, for example, in a storage box (not shown) provided below the discharge port 20. The resistance lid 21 can change the opening degree of the discharge port 20 by driving it to open and close relative to the discharge port 20. The opening degree of the resistance lid 21 shown in FIGS. 1 and 4 corresponds to that during normal operation of the device 1. That is, as shown in FIGS. 1 and 4, during normal operation of the device 1, the resistance lid 21 forms an opening degree that allows the resin material 2 to just barely pass through when the resin material feed section 10 is operating. Due to the rotation of the screw shaft 12 in the resistance lid 21 and the resin material feed section 10, a compressive force acts on the resin material 2 in the coating film grinding section 8.

[0036] During normal operation of the device 1, a compressive force acts on the resin material 2 in the coating film grinding section 8 while the peeling roll 15 rotates, causing the resin material 2 to rub against the mesh plate 16b (shown in FIG. 3) of the peeling tube 16. This causes the coating film of the resin material 2 to be ground away. Furthermore, while the coating film of the resin material 2 in the coating film grinding section 8 is being ground away by the above-mentioned action, the resin material 2 gradually moves toward the discharge port 20 and is discharged downward from between the discharge port 20 and the resistance cover 21.

[0037] The temperature inside the coating film grinding unit 8 rises due to friction between the resin material 2 and the peeling tube 16, and friction between the resin materials 2 themselves. From the perspective of efficiently grinding the coating of the resin material 2, it is desirable to operate the device 1 when the temperature inside the coating film grinding unit 8 is relatively high. However, if the resin material 2 being ground inside the device 1 exceeds a certain temperature (e.g., 120-130°C), it will soften more than necessary, and in the worst case scenario, the crushed pieces of the resin material 2 may stick together like tar. When this type of sticking of the resin material 2 occurs, the device must be shut down, and recovery requires significant effort.

[0038] Furthermore, the above-mentioned adhesion of the resin material 2 tends to progress rapidly when the temperature exceeds the specific temperature. Therefore, in order to prevent the above-mentioned problems, an operator needs to frequently monitor the inside of the device, which places a heavy burden on the operator.

[0039] Therefore, in this embodiment, the adhesion of the resin material 2 inside the device 1 is automatically suppressed without the need for monitoring by an operator. Specifically, as shown in Fig. 4, the discharge unit 9 of the device 1 of the present invention includes a first temperature sensor 23 and a lid driving device 25. The first temperature sensor 23 can measure the surface temperature of the resin material 2 discharged from the discharge port 20 in a non-contact manner.

[0040] FIG. 5 shows an enlarged view of the discharge unit 9 when the lid drive device 25 is operating. As shown in FIGS. 4 and 5, the lid drive device 25 drives the resistive lid 21 to increase the opening of the discharge port 20 when the surface temperature of the resin material 2 measured by the first temperature sensor 23 exceeds a specific threshold. This increase in opening reduces the compressive force acting on the resin material 2 inside the coating grinding unit 8. This reduces the amount of heat generated by friction when the coating on the resin material 2 is ground and by friction between the resin materials 2, thereby lowering the temperature of the resin material 2 itself and preventing the resin material 2 from sticking. In this embodiment, this action automatically and effectively prevents the resin material 2 from sticking inside the device 1.

[0041] The configuration of this embodiment will be described in more detail below. As shown in FIG. 4, the lid driving device 25 of this embodiment drives the resistance lid 21 using an air cylinder 26. Specifically, the lid driving device 25 includes an air cylinder 26 that strokes laterally and a link mechanism 27 connected to the air cylinder 26. The link mechanism 27 includes a first end 27a connected to the air cylinder 26, a second end 27b connected to the resistance lid 21, and a fulcrum portion 27c disposed between the first end 27a and the second end 27b. As shown in FIGS. 4 and 5, in this embodiment, the resistance lid 21 can be opened and closed by the stroke of the air cylinder 26. As described above, in this embodiment, by employing an air cylinder 26 that generally has a higher operating speed than an electric cylinder, the operating speed of the resistance lid 21 can be increased with a simple configuration, and adhesion of the resin material 2 can be reliably prevented.

[0042] The lid driving device 25 can position the resistor lid 21 at least in a "first position" and a "second position." Here, the "first position" refers to the position of the resistor lid 21 illustrated in FIG. 4, where the opening degree of the discharge port 20 is ensured during normal operation of the device 1. The "second position" refers to the position of the resistor lid 21 illustrated in FIG. 5, where the opening degree of the discharge port 20 is greater than that of the first position, thereby lowering the temperature inside the coating film grinding unit 8 through the above-described action. The first and second positions are determined appropriately depending on the type and flow rate of the resin material 2. It is more desirable for the lid driving device 25 to be able to adjust the position of the resistor lid 21 in more detail. That is, it is desirable for the lid driving device 25 to be able to drive the resistor lid 21 to any position, from a state in which the discharge port 20 is completely closed to a position where the opening degree is greater than that of the second position. This enables more precise control of the resistor lid 21 depending on the state of the coating film grinding unit 8. For example, during normal operation, the device 1 of this embodiment can finely adjust the opening degree and pressure of the resistor cover 21 around the first position in accordance with fluctuations in the operating current of the drive motor 11. This allows normal operation to be continued for a long period of time.

[0043] 4 and 5, the operation time of the lid driving device 25 from the first position to the second position is preferably 0.5 seconds or less, and more preferably 0.3 seconds or less, thereby more reliably preventing the resin material 2 from sticking.

[0044] The location of the first temperature sensor 23 is not particularly limited as long as it can measure the surface temperature of the resin material 2 being discharged. However, fine particles of resin material 2 and coating film (hereinafter referred to as dust) that float in the air are also discharged from the discharge port 20, and the dust tends to adhere to devices around the discharge port 20 due to static electricity. Furthermore, if dust adheres and accumulates on the first temperature sensor 23, there is a risk that the measurement accuracy will decrease. It is desirable to place the first temperature sensor 23 so that the influence of such dust is minimized.

[0045] FIG. 6 conceptually illustrates a front view of the discharge port 20, showing the location of the first temperature sensor 23 in this embodiment. In FIG. 6, the outer frame end surface 20a constituting the discharge port 20 and the roll end 8a included in the coating film grinding unit 8 are shown, with dots applied to the area between them. The resin material 2 is discharged from this dotted area. The outline of the resistor cover 21 is also indicated by a two-dot chain line. As shown in FIG. 6, the first temperature sensor 23 is preferably provided, for example, above the discharge port 20. This configuration means that the first temperature sensor 23 is provided at least at a position higher than the center position of the discharge port 20 in the height direction. This reduces the effect of dust.

[0046] Furthermore, the first temperature sensor 23 includes an emission surface 23a that emits infrared rays for temperature measurement, and this emission surface 23a faces downward. This makes it difficult for dust to accumulate on the emission surface 23a, thereby maintaining the measurement accuracy of the first temperature sensor 23. In a more desirable embodiment, the discharge unit 9 preferably includes an air blower 29 (not shown in FIGS. 1, 4, and 5) that can clean the emission surface 23a of the first temperature sensor 23. This allows the emission surface 23a to be cleaned by the air blower 29 before dust accumulates thereon, thereby maintaining the measurement accuracy of the first temperature sensor 23.

[0047] The first temperature sensor 23 in this embodiment is disposed, for example, directly above the discharge port 20, and measures the temperature of the resin material 2 by passing infrared rays through the gap between the outer frame end surface 20a of the discharge port 20 and the resistance cover 21. This makes it possible for the resistance cover 21 to prevent dust from moving toward the first temperature sensor 23. However, the first temperature sensor 23 is not limited to this type of placement. For example, if it is difficult for infrared rays to pass through the gap between the outer frame end surface 20a and the resistance cover 21, the position of the first temperature sensor 23 can be adjusted as appropriate to make it easier for infrared rays to pass through.

[0048] 1 and 2, the device 1 of this embodiment includes a drive motor 11 that drives the coating film grinding unit 8, and a motor control unit 56. The drive motor 11 operates the coating film grinding unit 8 in conjunction with the screw shaft 12 of the resin material feed unit 10. The motor control unit 56 reduces the operating current of the drive motor 11 when the temperature measured by the first temperature sensor 23 exceeds a specific threshold value. This stops the temperature and pressure inside the coating film grinding unit 8 from increasing, and reliably prevents the resin material 2 from sticking.

[0049] The apparatus 1 includes an air blower 30 capable of blowing air to the coating film grinding section 8, and an air blower control unit 57. In this embodiment, the peeling roll 15 and the screw shaft 12 are hollow, and the air blower 30 includes an air blower (not shown) that supplies air to their interiors. Air from the air blower passes through the screw shaft 12 and the peeling roll 15 and is discharged toward the peeling tube 16, thereby lowering the temperature of the coating film grinding section 8. The air blower control unit 57 also activates the air blower 30 when the temperature measured by the first temperature sensor 23 exceeds a specific threshold. In other words, the apparatus 1 of this embodiment can actively lower the temperature of the coating film grinding section 8 by blowing air as needed.

[0050] FIG. 7 shows a graph representing the measurement results of the first temperature sensor 23. In FIG. 7, the horizontal axis represents time (sec) and the vertical axis represents the temperature (°C) of the resin material 2. As shown in FIG. 7, the device 1 of this embodiment is controlled so that the surface temperature of the resin material 2 does not exceed the upper limit value TU. Therefore, when the surface temperature of the resin material 2 exceeds a specific threshold value T1, the device 1 drives the resistance cover 21 to increase the opening of the discharge port 20, reduces the operating current of the drive motor 11, and operates the air blower 30. This device 1 can suppress adhesion of the resin material 2 and significantly reduce the burden on the operator of monitoring the device 1. In the case of the resin material 2 assumed in this embodiment (crushed resin molded products related to the exterior and interior of vehicles and home appliances), the upper limit value TU is set to, for example, 120 to 140°C. The threshold value T1 is set to, for example, 110 to 130°C. The device 1 of this embodiment can set such high upper limit value TU and threshold value T1, and therefore can grind the coating film of the resin material 2 efficiently.

[0051] Furthermore, the apparatus 1 is controlled so that the temperature of the resin material 2 does not fall below a lower limit TL. Therefore, when the surface temperature of the resin material 2 falls below a specific threshold T2, the apparatus 1 increases the operating current of the drive motor 11 or stops the air blower 30 if it is operating. This allows the apparatus 1 to maintain its interior at a temperature at which the coating film of the resin material 2 can be efficiently ground. In the case of the resin material 2 assumed in this embodiment, the lower limit TL is set to, for example, 90 to 110°C. The threshold T2 is set to, for example, 100 to 120°C.

[0052] 1 and 2, in order to thoroughly grind the coating film of the resin material 2, the resin material 2 may be passed through the device 1 multiple times. In order to deal with such situations, the device 1 preferably includes not only the first temperature sensor 23 but also a second temperature sensor 24 that can measure the surface temperature of the resin material 2 upstream of the coating film grinding section 8. Furthermore, the lid driving device 25 preferably drives the resistance lid 21 based on the measurement result of the second temperature sensor 24. This allows the device 1 to be controlled with even higher accuracy.

[0053] The second temperature sensor 24 of this embodiment is provided in, for example, the supply unit 6 and can measure the surface temperature of the resin material 2 flowing from the supply valve 6b. By measuring the surface temperature of the resin material 2 here, for example, it is possible to accurately determine an appropriate operating current for the drive motor 11. Furthermore, for example, if the difference between the temperature measured by the first temperature sensor 23 and the temperature measured by the second temperature sensor 24 exceeds a specific threshold, control such as stopping the device 1 can be performed, thereby preventing serious problems from occurring in the device 1. Furthermore, if the first temperature sensor 23 breaks down, it is also possible to alternatively perform emergency operation of the device 1 based on the measurement result of the second temperature sensor 24.

[0054] Although a particularly preferred embodiment of the present invention has been described above in detail, the present invention is not limited to the illustrated embodiment and can be modified in various ways. In this embodiment, a so-called horizontal type coating film stripping device in which the rotation shafts of the stripping roll 15 of the coating film grinding unit 8 and the drive motor 11 extend horizontally has been exemplified, but the present invention can also be applied to, for example, a so-called vertical type coating film stripping device in which the rotation shafts extend vertically. [Industrial Applicability]

[0055] As described above, the present invention is useful as a coating film stripping device. [Explanation of symbols]

[0056] 2. Resin material 8 Coating film grinding section 9 Discharge part 20 outlet 21 Resistance lid 23 First temperature sensor 25 Lid drive unit

Claims

1. a coating film grinding unit that grinds off a coating film adhering to the surface of the pulverized resin material; a discharge section having a discharge port that discharges the resin material from which the coating film has been ground off from the coating film grinding section, The discharge section is a resistance cover that can change the opening degree of the ejection port by being driven to open and close the ejection port; a first temperature sensor capable of measuring the surface temperature of the resin material in a non-contact manner; a lid driving device that drives the resistance lid to increase the opening degree of the discharge port when the surface temperature exceeds a specific threshold value, Paint film stripping device.

2. The coating film removing device according to claim 1, The lid driving device includes an air cylinder that drives the resistance lid.

3. The coating film removing device according to claim 1 or 2, A coating film removing device including: a drive motor that drives the coating film grinding unit; and a motor control unit that reduces the operating current of the drive motor when the temperature measured by the first temperature sensor exceeds a specific threshold value.

4. The coating film removing device according to claim 1 or 2, A coating film removing device comprising: an air blowing unit capable of blowing air to the coating film grinding unit; and an air blowing control unit that operates the air blowing unit when the temperature measured by the first temperature sensor exceeds a specific threshold value.

5. The coating film removing device according to claim 1 or 2, The first temperature sensor is provided above the discharge port.

6. The coating film removing device according to claim 5, the first temperature sensor includes an emitting surface that emits infrared rays for temperature measurement; The discharge section includes an air blower capable of cleaning the emission surface.

7. The coating film removing device according to claim 1 or 2, a second temperature sensor capable of measuring a surface temperature of the resin material upstream of the coating film grinding portion; The lid driving device drives the resistance lid based on the temperature measured by the second temperature sensor.

Images