Peeling apparatus and method for peeling laminated body

Abstract

To provide a peeling apparatus and a peeling method which can securely separate respective layers composing a laminated body.SOLUTION: A peeling apparatus comprises: a conveyance part 30 conveying a laminated body 20 including a first layer 21 containing a thermoplastic resin and a second layer 22; a heating press part 50 welding the first layer 21 to a surface 30A of the conveyance part 30 by pressing the laminated body 20 conveyed by the conveyance part 30 while heating; a peeling part 70 disposed on the downstream side in the conveyance direction of the laminated body 20 by the conveyance part 30 relative to the heating press part 50 and peeling the second layer 22 from the first layer 21; and a vibration part 90 vibrating the conveyance part 30.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The technology disclosed in this specification relates to a peeling device and a method for peeling a laminate.

Background Art

[0002] Conventionally, in order to reuse a used laminate, it has been required to separate each layer constituting the laminate. Patent Document 1 below describes a peeling method in which a laminate (tile carpet) including a backing layer and a base fabric is fixed by pressing and fixing means, and the base fabric is peeled off from the backing layer using peeling means (base fabric peeling means).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the peeling method of Patent Document 1 above, since the laminate is fixed by pressing the surface on the base fabric side, it is difficult to bring the peeling means into contact with the entire surface of the base fabric. For this reason, there is a concern that a part of the base fabric remains on the backing layer side without being peeled off from the backing layer. In addition, in the method of pressing and fixing the laminate, there is a concern that the laminate moves during peeling, which hinders the peeling operation.

[0005] The technology disclosed in this specification has been completed based on the above circumstances, and an object thereof is to provide a peeling device and a peeling method capable of reliably separating each layer constituting a laminate.

Means for Solving the Problems

[0006] As a means for solving the above problems, the peeling device disclosed in this specification includes a conveying unit that conveys a laminate including a first layer containing a thermoplastic resin and a second layer, and a heating press unit that welds the first layer to the surface of the conveying unit by pressing while heating the laminate conveyed by the conveying unit. A peeling unit that is disposed on the downstream side in the conveying direction of the laminate by the conveying unit with respect to the heating press unit and peels the second layer from the first layer, and a vibration unit that vibrates the conveying unit. It is characterized by comprising.

[0007] By welding the first layer to the conveying unit, the laminate can be fixed to the conveying unit, and the second layer can be reliably peeled from the first layer. In addition, since it is not necessary to press and fix the laminate from the second layer side, the peeling unit can be brought into contact over the entire surface of the second layer, and a situation where a part of the second layer remains on the first layer side can be suppressed. Furthermore, by vibrating the conveying unit with the first layer welded thereto by the vibration unit, the first layer cannot follow the vibration of the conveying unit due to inertia, and the first layer can be separated from the conveying unit. Thereby, the first layer can be easily removed from the conveying unit and recovered.

[0008] Also, it can be configured to include a plurality of the conveying units arranged in a ring shape, and each of the plurality of conveying units can move along the arrangement direction of the plurality of conveying units.

[0009] By providing a plurality of conveying units arranged in a ring shape, a plurality of laminates can be continuously conveyed. If the conveying unit forming a ring is composed of a single member, it is conceivable to bend the material forming the conveying unit into a ring shape. In such a configuration, it is necessary to use a material that is easily bendable for the conveying unit, and the material is limited. On the other hand, in the above configuration, since a plurality of conveying units are arranged in a ring shape, the degree of freedom in selecting the material can be increased.

[0010] Further, the transport unit can be made of a material having a thermal conductivity of 200 W / m·K or more. The transport unit can be easily heated, and the first layer can be more reliably welded to the transport unit. Also, in the above configuration, by providing a plurality of transport units, the degree of freedom in material selection can be increased, so it becomes easier to select a material having a thermal conductivity of 200 W / m·K or more, which is preferable.

[0011] Further, the transport unit can be made of a material having a frequency of 0.6 Hz or more. The larger the frequency of the material, the easier it is to vibrate. By setting the frequency of the transport unit to the above value, the transport unit can be easily vibrated. Also, in the above configuration, by providing a plurality of transport units, the degree of freedom in material selection can be increased, so it becomes easier to select a material having a frequency of 0.6 Hz or more, which is preferable.

[0012] Also, as a means for solving the above problems, the method for peeling a laminate disclosed in this specification includes a heating press step of welding the first layer to the surface of the transport unit by heating and pressing the laminate including the first layer containing a thermoplastic resin and the second layer while transporting the laminate by the transport unit, a peeling step of peeling the second layer from the first layer, which is executed after the heating press step, and a vibration step of vibrating the transport unit, which is executed after the peeling step.

Advantages of the Invention

[0013] According to the present invention, it is possible to provide a peeling device and a peeling method capable of reliably separating each layer constituting the laminate.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0015] One embodiment of the present invention will be described with reference to FIGS. 1 to 9. As shown in FIG. 3, the peeling device 10 of this embodiment includes a plurality of conveying units 30 that convey the laminate 20, and a heating press unit 50 that presses the laminate 20 conveyed by the conveying unit 30 while heating it, so as to weld the first layer 21 of the laminate 20 to the surface 30A (upper surface) of the conveying unit 30. A peeling unit 70 is arranged on the downstream side in the conveying direction of the laminate 20 by the conveying unit 30 with respect to the heating press unit 50, and peels the second layer 22 from the first layer 21, and a vibration unit 90 that vibrates the conveying unit 30 (see FIG. 4).

[0016] As shown in FIG. 1, the laminate 20 includes a first layer 21, a second layer 22, a third layer 23, and a fourth layer 24. The first layer 21 is a layer having a function of preferably absorbing vibrations such as sound (absorbing more than the other layers 22 to 24), and may be called a backing layer. The second layer 22 has a function of absorbing vibrations that could not be absorbed by the first layer 21. The third layer 23 has a function as an adhesive for bonding the second layer 22 and the fourth layer 24. The fourth layer 24 is a layer that constitutes the skin in the vehicle interior material (specifically described later) that forms the base of the laminate 20. By the fourth layer 24, it is possible to improve the texture, touch, design, etc. of the surface of the laminate 20.

[0017] The first layer 21 to the fourth layer 24 are made of a thermoplastic resin. As the thermoplastic resin constituting the first layer 21 and the third layer 23, for example, polyethylene (PE) can be used. As the thermoplastic resin constituting the second layer 22 and the fourth layer 24, for example, polyethylene terephthalate (PET) having a melting point higher than that of PE can be used. Note that the thermoplastic resin constituting each layer 21 to 24 can be appropriately changed, and in addition to the above-mentioned thermoplastic resin, for example, polypropylene (PP), polylactic acid (PLA), etc. can be used.

[0018] As shown in FIG. 2, the laminate 20 is a waste material generated when cutting out the vehicle interior material 26 from a plate material 25 having the same cross-sectional configuration as the laminate 20. Specifically, when manufacturing the vehicle interior material 26 (for example, a vehicle floor carpet, etc.) by cutting a rectangular plate material 25 using a molding die or the like, a frame-shaped waste material 27 is generated. By cutting this waste material 27 at a predetermined location (the dashed line in FIG. 2), a plurality of longitudinally-shaped (strip-shaped) laminates 20 can be obtained.

[0019] As shown in FIG. 3, the plurality of conveying units 30 are arranged in a ring shape. Adjacent conveying units 30 are connected by a connecting portion 31, and the conveying unit 30 is rotatably attached to the connecting portion 31 via a hinge 32. The plurality of conveying units 30 are spanned by rollers 34 and 35. Note that the conveying unit 30 is composed of a plate material having a U-shaped cross section as shown in FIG. 4, and has a bottom wall portion 36 and a pair of side wall portions 37, 37. Note that the shape of the conveying unit 30 is not limited to this. Also, the side wall portions 37 of the conveying unit 30 are omitted in FIGS. 3, 6, and 7.

[0020] The rollers 34, 35 are configured to be rotatable clockwise in FIG. 3 by a driving device (for example, a motor, etc.) not shown. Thus, when the rollers 34, 35 rotate, the plurality of conveying units 30 are configured to be rotatable clockwise in FIG. 3. That is, each of the plurality of conveying units 30 is configured to be movable along the arrangement direction of the plurality of conveying units 30.

[0021] As shown in FIG. 3, the heating press section 50 includes a belt 51, a pair of rollers 52 and 53 for driving the belt 51, and a heating section 55. The belt 51 is made of a metal such as stainless steel, for example. As shown in FIG. 4, the facing interval T1 between the lower surface of the belt 51 and the surface 30A (upper surface) of the conveying section 30 is set to a value smaller than the thickness L1 (see FIG. 1) of the laminate 20 in the state before passing through the heating press section 50. Thereby, the laminate 20 is pressed against the surface 30A of the conveying section 30 in the process of passing under the belt 51.

[0022] As shown in FIG. 3, the heating section 55 is disposed below the conveying section 30 facing the belt 51 among the plurality of conveying sections 30. The heating section 55 is constituted by, for example, an electric heater, and is capable of heating the adjacent conveying section 30. Thereby, in the arrangement region of the heating section 55, it is possible to heat the laminate 20 via the conveying section 30. Note that the heating method of the heating section 55 is not limited to the above-described one, and for example, as the heating section 55, one capable of heating by blowing hot air against the conveying section 30 may be used.

[0023] As shown in FIG. 3, the peeling section 70 is disposed downstream of the heating press section 50 in the conveying direction of the laminate 20 by the conveying section 30. In FIGS. 3 to 8, the portion of the laminate 20 composed of the second layer 22 to the fourth layer 24 is shown in a simplified manner. In the following description, the portion of the laminate 20 composed of the second layer 22 to the fourth layer 24 is referred to as a part 28 of the laminate 20.

[0024] The peeling section 70 includes three rollers 71 and a triangular wire 72 stretched over the three rollers 71. A plurality of blades 73 are formed on the surface of the wire 72. Each roller 71 can be rotated clockwise in FIG. 3 by a driving device (such as an electric motor) not shown. Thereby, by rotating the roller 71, the wire 72 can be rotated clockwise in FIG. 3.

[0025] The protruding height of the plurality of blades 73 is set to a height such that when the laminate 20 passes below it, a part 28 of the laminate 20 is caught while not being caught by the first layer 21. Thereby, the plurality of blades 73 can be peeled off from the first layer 21 by catching a part 28 (including the second layer 22) of the laminate 20.

[0026] Although not shown, a plurality of wires 72 are arranged along the axial direction of the roller 71 (the direction penetrating the paper surface of FIG. 3). A roller 74 is arranged between adjacent wires 72. A part of the roller 74 is arranged so as to protrude from the surface of the wire 72. Thereby, as shown in FIG. 6, a part 28 of the laminate 20 peeled off from the first layer 21 rides on the surface of the roller 74, so that it is configured to be separated from the plurality of blades 73.

[0027] As shown in FIGS. 4 and 5, a plurality of vibration units 90 are provided at both ends in the width direction on the surface 30A of the conveyance unit 30. The vibration units 90 are arranged so as to avoid the heating unit 55 in a plan view of FIG. 5. The vibration unit 90 is constituted by, for example, a piezoelectric element, and can be vibrated at a predetermined frequency (for example, 20 to 40 KHz) when a voltage is applied. Thereby, by operating the vibration unit 90, the conveyance unit 30 can be vibrated to separate the first layer 21 from the conveyance unit 30. Further, as shown in FIGS. 7 and 8, a storage box 80 opened upward is provided below the plurality of conveyance units 30, and the separated first layer 21 can be recovered.

[0028] Next, the material of the conveyance unit 30 will be described. As described above, the conveyance unit 30 is heated by the heating unit 55. Therefore, in order to efficiently heat the conveyance unit 30, it is preferable that the thermal conductivity is high, and the conveyance unit 30 is preferably made of a material having a thermal conductivity of 200 W / m·K or more. Further, as described above, the conveyance unit 30 is vibrated by the vibration unit 90. Therefore, in order to efficiently vibrate the conveyance unit 30, it is preferable that the frequency is high, and the conveyance unit 30 is preferably made of a material having a frequency of 0.6 Hz or more.

[0029] Incidentally, the above-mentioned frequency f can be expressed by Equation (1). In Equation (1), when E / ρ is 14 or more, the frequency f becomes 0.6 Hz or more.

Number

[0030] From the above, as the material of the transport unit 30, it is preferable that both the thermal conductivity and the frequency are high. Fig. 9 shows the physical property values of main metals. As shown in Fig. 9, as the material of the transport unit 30, copper, aluminum, etc. with both high thermal conductivity (W / m·K) and frequency are more preferable, but it is not limited thereto.

[0031] Next, a method for peeling the laminate 20 using the peeling device 10 will be described. The method for peeling the laminate according to the present embodiment includes a heating press step of welding the first layer 21 to the surface 30A of the transport unit 30, a peeling step that is executed after the heating press step and peels a part 28 (including the second layer 22) of the laminate 20 from the first layer 21, and a vibration step that is executed after the peeling step and vibrates the transport unit 30.

[0032] (Heating press step) In the heating press step, as shown in Fig. 3, while operating the heating unit 55 and transporting the laminate 20 by the transport unit 30, it is passed under the belt 51. Thereby, by heating and pressing the laminate 20, the first layer 21 is welded to the surface 30A (the surface on the belt 51 side) of the transport unit 30. Incidentally, the heating temperature of the laminate 20 at this time is, for example, equal to or higher than the melting point of the PE constituting the first layer 21 and lower than the melting point of the PET constituting the second layer 22.

[0033] (Peeling step) ​In the peeling process, as shown in FIG. 6, a part 28 of the laminate 20 is caught by a plurality of blades 73 provided in the peeling section 70, and thus is peeled from the first layer 21. The peeled part 28 is conveyed to the roller 74 by the plurality of blades 73, then rides on the surface of the roller 74, separates from the plurality of blades 73, and is then collected. On the other hand, the first layer 21 passes below the peeling section 70 in a state of being welded to the conveying section 30, and is then conveyed above the storage box 80.

[0034] (Vibration process) In the vibration process, the vibration section 90 provided in the conveying section 30 is operated to vibrate the conveying section 30. As a result, due to inertia, the first layer 21 cannot follow the vibration of the conveying section 30, and the first layer 21 can be separated from the conveying section 30. As a result, the separated first layer 21 (designated by reference numeral 21A and shown by a two-dot chain line in FIGS. 7 and 8) is received by falling into the storage box 80.

[0035] Note that the vibration section 90 is operated when the first layer 21 faces the storage box 80. For example, when an operator operates the heating section 55, the time T2 from when the heating section 55 is operated until the first layer 21 faces the storage box 80 is measured in advance, and the vibration section 90 may be operated when the time T2 has elapsed after the heating section 55 is operated. Alternatively, the time T2 may be calculated based on the conveying speed of the conveying section 30 and the conveying distance from the heating section 55 to the storage box 80 by the conveying section 30.

[0036] Next, the effects of this embodiment will be described. By welding the first layer 21 to the transport unit 30, the laminate 20 can be fixed to the transport unit 30, and the second layer 22 can be reliably peeled off from the first layer 21. Further, since it is not necessary to press and fix the laminate 20 from the second layer 22 side, the peeling portion 70 can be brought into contact over the entire surface of the second layer 22, and a situation where a part of the second layer 22 remains on the first layer 21 side can be suppressed. Furthermore, by vibrating the transport unit 30 in the state where the first layer 21 is welded by the vibrating unit 90, the first layer 21 cannot follow the vibration of the transport unit 30 due to inertia, and the first layer 21 can be separated from the transport unit 30. As a result, the first layer 21 can be easily removed from the transport unit 30 and recovered.

[0037] Also, a plurality of transport units 30 arranged in a ring shape are provided, and each of the plurality of transport units 30 is configured to be movable along the arrangement direction of the plurality of transport units 30. By providing a plurality of transport units 30 arranged in a ring shape, a plurality of laminates 30 can be continuously transported. If the annular transport unit is composed of a single member, it is conceivable to bend the material constituting the transport unit into a ring shape. In such a configuration, it is necessary to use a material that is easily bendable for the transport unit, and the material is limited. On the other hand, in the above configuration, since a plurality of transport units 30 are arranged in a ring shape, the degree of freedom in selecting the material can be increased.

[0038]

[0039] In addition, the conveying unit 30 is made of a material with a frequency of 0.6 Hz or more. The greater the frequency of the material, the easier it is to vibrate. By setting the frequency of the conveying unit 30 to the above value, the conveying unit 30 can be made easier to vibrate. Further, in the above configuration, by providing a plurality of conveying units 30, the degree of freedom in the selection of the material can be increased, so it becomes easier to select a material with a frequency of 0.6 Hz or more, which is preferable.

[0040] <Other Embodiments> The technology disclosed in this specification is not limited to the embodiments described by the above description and drawings. For example, the following embodiments are also included in the technical scope. (1) In the above embodiment, an example is given in which the laminate has a four-layer structure, but it is not limited to this. The laminate may have at least two layers. (2) In the above embodiment, an example is given in which a plurality of conveying units are provided, but the conveying unit may be constituted by a single annular member. (3) In the above embodiment, an example is given in which the laminate is the waste material generated when manufacturing the interior material for a vehicle, but it is not limited to this. For example, the laminate may be the interior material for a vehicle itself, or a component provided on the interior material (such as a sound-absorbing material or a cushioning material provided on a door trim, etc.).

Explanation of Reference Numerals

[0041] 10... Peeling device, 20... Laminate, 21... First layer, 22... Second layer, 30... Conveying unit, 30A... Surface of the conveying unit, 50... Heating press unit, 70... Peeling unit, 90... Vibration unit

Claims

1. A conveying unit that conveys a laminate including a first layer containing a thermoplastic resin and a second layer, A heating press unit that welds the first layer to the surface of the conveying unit by heating and pressing the laminate conveyed by the conveying unit, A peeling unit that is arranged on the downstream side in the conveying direction of the laminate by the conveying unit with respect to the heating press unit and peels the second layer from the first layer, A vibration unit that vibrates the conveying unit, and a peeling device.

2. Comprising a plurality of the conveying units arranged in a ring, The peeling device according to claim 1, wherein each of the plurality of conveying units is configured to be movable along the arrangement direction of the plurality of conveying units.

3. The peeling device according to claim 2, wherein the conveying unit is made of a material having a thermal conductivity of 200 W / m·K or more.

4. The peeling device according to claim 2 or claim 3, wherein the conveying unit is made of a material having a frequency of 0.6 Hz or more.

5. A heating press step of welding the first layer to the surface of the conveying unit by heating and pressing the laminate including the first layer containing a thermoplastic resin and the second layer while conveying the laminate by the conveying unit, A peeling step that is executed after the heating press step and peels the second layer from the first layer, A vibration step that is executed after the peeling step and vibrates the conveying unit, and a method for peeling a laminate.

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