Conveying device and heating device

Abstract

A fixing member (109) is provided with: a facing surface (109G) that faces the outer peripheral surface (101E) of a cylindrical member (101); and an opposite surface (109H) located on the opposite side of the facing surface (109G). The facing surface (109G) is provided with a plurality of flow paths (130) through which a cooling medium passes. A plurality of flow paths (130) are provided in each of the first constituent member (109A) and the second constituent member (109B). A plurality of grooves (131) are provided in an opposing surface (109G) of the fixing member (109), the opposing surface being located at a location opposing the outer peripheral surface (101E) of the cylindrical member (101), and a plurality of flow paths (130) are formed by the plurality of grooves (131).

Description

Technical Field

[0001] The present invention relates to a conveying device and a heating device. Background Art

[0002] In Patent Document 1, a structure is disclosed in which a cylinder having a spiral groove formed on its inner peripheral surface is fixed in close contact with the outer peripheral surface of a cylinder for extruding, heating, and melting a resin with a spiral screw.

[0003] Prior Art Documents

[0004] Patent Document

[0005] Patent Document 1: Japanese Patent Laid-Open No. 7-195494 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] When manufacturing a molded product, sometimes after extruding the heated resin, it is supplied to a mold to manufacture the molded product.

[0008] Here, if the temperature of the resin becomes higher than necessary, it may cause a decrease in the quality of the resin or the like. When the temperature of the resin is high, it is preferable to flow a cooling medium to lower the temperature of the resin. However, if the cooling efficiency is low, it takes time to lower the temperature of the resin.

[0009] An object of the present invention is to more effectively lower the temperature of the resin by supplying a cooling medium.

[0010] Means for Solving the Problems

[0011] The conveying device of the present invention includes: a conveying mechanism for conveying a resin; a cylindrical member through which the resin conveyed by the conveying mechanism passes; a heating source disposed at a position opposed to the outer peripheral surface of the cylindrical member for heating the inside of the cylindrical member; and a flow path disposed at least partially on a side closer to the outer peripheral surface than the heating source in the radial direction of the cylindrical member, through which a medium for cooling the cylindrical member passes. The flow path is disposed along the circumferential direction of the cylindrical member and a plurality of them are provided.

[0012] Here, it may further include a fixing member disposed at a position opposed to the outer peripheral surface of the cylindrical member and fixed to the cylindrical member, supporting the heating source, and provided with a plurality of the flow paths. An inlet portion for the medium is provided on the fixing member toward the plurality of flow paths, and a common inlet portion is provided for the plurality of flow paths.

[0013] Moreover, an outlet portion of the medium that has passed through the plurality of flow paths may be provided on the above-described fixed member, and the medium that has passed through the plurality of flow paths is discharged from the common outlet portion.

[0014] Furthermore, a fixed member may be further provided. The fixed member is disposed at a position opposite to the outer peripheral surface of the cylindrical member and fixed to the cylindrical member, supports the heating source, and is provided with a plurality of the flow paths. An inlet portion of the medium toward the plurality of flow paths is provided on the fixed member. The fixed member is composed of a plurality of constituent members having different positions in the circumferential direction of the cylindrical member, and the inlet portion is formed by a gap existing between one of the constituent members and another constituent member adjacent to each other in the circumferential direction.

[0015] Furthermore, a fixed member may be further provided. The fixed member is disposed at a position opposite to the outer peripheral surface of the cylindrical member and fixed to the cylindrical member, supports the heating source, and is provided with a plurality of the flow paths. An outlet portion of the medium that has passed through the plurality of flow paths is provided on the fixed member. The fixed member is composed of a plurality of constituent members having different positions in the circumferential direction of the cylindrical member, and the outlet portion is formed by a gap existing between one of the constituent members and another constituent member adjacent to each other in the circumferential direction.

[0016] Furthermore, a fixed member may be further provided. The fixed member is disposed at a position opposite to the outer peripheral surface of the cylindrical member and fixed to the cylindrical member, supports the heating source, and is provided with a plurality of the flow paths. An inlet portion of the medium toward the plurality of flow paths and an outlet portion of the medium that has passed through the plurality of flow paths are provided on the fixed member. The outlet portion is provided on the side opposite to the side where the inlet portion is provided with the axis of the cylindrical member interposed therebetween.

[0017] Moreover, in a case where a virtual plane extending along the axis of the cylindrical member and passing through both the inlet portion and the outlet portion is assumed, the plurality of flow paths are respectively provided in two regions opposed to each other with the virtual plane interposed therebetween.

[0018] The plurality of flow paths may be provided in a form that extends in the circumferential direction of the cylindrical member and is substantially parallel at positions having different positions in the axial direction of the cylindrical member.

[0019] Further, a fixing member may be further provided. The fixing member is disposed at a position opposed to the outer peripheral surface of the cylindrical member and fixed to the cylindrical member, supports the heating source, and has a plurality of the flow paths. A plurality of grooves are provided at a portion of the fixing member opposed to the outer peripheral surface, and the plurality of flow paths are formed by the plurality of grooves.

[0020] Further, it may further include: a fixing member disposed at a position opposed to the outer peripheral surface of the cylindrical member and fixed to the cylindrical member, having a plurality of the flow paths with the heating source disposed inside, and having an opposed surface opposed to the outer peripheral surface and an opposite surface on the side opposite to the opposed surface; and a supply mechanism for supplying the medium to the plurality of flow paths. A part of the medium directed toward the plurality of flow paths by the supply mechanism is supplied to the opposite surface of the fixing member.

[0021] Moreover, in the case where the present invention is a heating device, the heating device to which the present invention is applied is a heating device for heating resin passing through a cylindrical member, and includes: a heating source disposed at a position opposed to the outer peripheral surface of the cylindrical member for heating the inside of the cylindrical member; and a flow path disposed at least partially closer to the outer peripheral surface than the heating source in the radial direction of the cylindrical member and through which a medium for cooling the cylindrical member passes. The flow path is disposed along the circumferential direction of the cylindrical member and a plurality of the flow paths are provided.

[0022] Advantageous Effects of the Invention

[0023] According to the present invention, the temperature of the resin can be more effectively reduced by supplying a cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A view showing an example of an extrusion molding machine.

[0025] Figure 2 A perspective view when observing the heating device obliquely from above.

[0026] Figure 3 A view showing an example of a fixing method of a first component and a second component.

[0027] Figure 4 For Figure 2 a cross-sectional view of the heating device taken along line IV-IV.

[0028] Figure 5 For Figure 2 a view of the second component when observed from the direction indicated by arrow V in

[0029] Figure 6 (A) inFigure 6 In (B), it is a figure showing the inlet part and the outlet part.

[0030] Figure 7 In (A), Figure 7 In (B), it is a cross-sectional view of the second component.

[0031] Figure 8 In (A), Figure 8 In (B), it is a figure illustrating a comparative example of the heating device.

[0032] Figure 9 It is along Figure 5 a cross-sectional view of the second component along the IX - IX line of

[0033] Figure 10 It is along Figure 1 a cross-sectional view of the conveying device along the X - X line of

[0034] Figure 11 It is a figure showing another configuration example of the conveying device.

[0035] Figure 12 It is a figure showing another configuration example of the second component. Detailed Embodiments

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0037] Figure 1 It is a figure showing an example of the extrusion molding machine 1 of the present embodiment.

[0038] On the extrusion molding machine 1, a conveying device 10 for conveying resin is provided. The conveying device 10 has a function of extruding the resin after heating the resin as a molding material. And, on the extrusion molding machine 1, a supply device 80 for supplying resin to the conveying device 10 is provided.

[0039] Moreover, on the extrusion molding machine 1, a mold 90, which is supplied with the resin extruded by the conveying device 10, and a connecting portion 95 for connecting the mold 90 and the conveying device 10 are provided.

[0040] And, on the extrusion molding machine 1, a control device 60 is provided, and the control device 60 controls each part provided on the extrusion molding machine 1.

[0041] On the conveying device 10, a cylindrical member 101 through which the conveyed resin passes is provided.

[0042] The cylindrical member 101 is formed in a cylindrical shape. A resin inlet portion 101A is provided on the cylindrical member 101, and the resin inlet portion 101A serves as an inlet for the resin supplied by the supply device 80. Here, the resin is in granular form (pellet form), and in the present embodiment, the granular resin is supplied into the interior of the cylindrical member 101 through the resin inlet portion 101A.

[0043] A resin storage portion 81 for storing the resin is provided on the supply device 80, and in the present embodiment, the resin is supplied from the resin storage portion 81 to the cylindrical member 101 located below.

[0044] Moreover, a discharge portion 101D is provided at the end portion 101B of the cylindrical member 101, and the resin that has passed through the interior of the cylindrical member 101 is discharged from the discharge portion 101D. In the present embodiment, the resin in a molten state is discharged from the discharge portion 101D.

[0045] The discharge portion 101D is provided at a position on the downstream side of the resin inlet portion 101A in the moving direction of the resin moving within the cylindrical member 101.

[0046] A conveying member 104 is provided inside the cylindrical member 101, and the conveying member 104 conveys the resin and finally extrudes the resin from the cylindrical member 101.

[0047] As an example of the conveying mechanism, the conveying member 104 is composed of a screw-shaped member. The conveying member 104 includes a rotating shaft 104A arranged along the axial direction of the cylindrical member 101 and a spiral-shaped protrusion 104B provided around the rotating shaft 104A.

[0048] The spiral-shaped protrusion 104B is provided from one end portion in the length direction of the rotating shaft 104A to the other end portion.

[0049] The conveying member 104 is rotated by a force from a motor (not shown) and conveys the resin along the axial direction of the cylindrical member 101.

[0050] More specifically, the rotating shaft 104A of the conveying member 104 is rotated by a force from the motor, whereby the protrusion 104B presses the resin in the axial direction of the rotating shaft 104A and toward the side where the discharge portion 101D is provided. After the resin reaches the discharge portion 101D, it is extruded to the outside of the cylindrical member 101 through the discharge portion 101D.

[0051] In addition, the conveying method of the conveying mechanism for the resin is not limited to the method using the conveying mechanism provided with the spiral-shaped protrusion 104B, and it may also be set to a method of conveying the resin by other known methods.

[0052] The resin extruded from the discharge portion 101D is supplied to the mold 90 through the connecting portion 95.

[0053] A ring-shaped path 91 through which resin passes is provided on the mold 90. In the present embodiment, inflation molding is performed by passing the molten resin through the ring-shaped path 91, and a hose-shaped film is formed as an example of the molded product.

[0054] Here, the mold through which the resin passes is described as an example, but the mold is not limited to this. The resin can also be supplied to the mold composed of the movable-side mold and the fixed-side mold and filled with resin inside by the conveying device 10 of the present embodiment.

[0055] In the embodiment, the extrusion molding machine 1 for inflation molding is described as an example, but the configuration of the present embodiment can be applied to all devices that require heating and cooling in the resin conveying devices such as injection molding machines and extrusion molding machines other than inflation molding machines.

[0056] A heating device 105 for heating the resin passing through the inside of the cylindrical member 101 is further provided on the conveying device 10. In the present embodiment, when the process of the extrusion molding machine 1 starts, power is supplied to the heating device 105, and the temperature of the cylindrical member 101 rises.

[0057] In the present embodiment, the heating device 105 is powered by controlling the power supply by the control device 60.

[0058] The heating device 105 is formed in a ring shape and is provided around the cylindrical member 101. And a plurality of heating devices 105 are provided and are arranged at different positions in the axial direction of the cylindrical member 101.

[0059] And, in the present embodiment, Figure 1 a blowing device 107 is provided on the front side closer to the cylindrical member 101 than the cylindrical member 101, and the blowing device 107 blows air as an example of the cooling medium for cooling the cylindrical member 101.

[0060] The blowing devices 107 are provided in a form corresponding to the heating devices 105 respectively, and a plurality of blowing devices 107 are provided.

[0061] The air blown out by the blowing device 107 is supplied to a plurality of flow paths (described later) provided in the heating device 105. The blowing device 107 is a supply mechanism for supplying air to the plurality of flow paths provided in the heating device 105, and by generating the flow of air toward the plurality of flow paths by the blowing device 107, air is supplied to the plurality of flow paths.

[0062] In addition, in the present embodiment, a blower device 107, which is an example of a supply mechanism, is provided on the upstream side of the plurality of flow paths. However, it is not limited thereto, and a suction device for sucking air may be provided on the downstream side of the plurality of flow paths. In this case, the suction device, which is another example of a supply mechanism, generates a flow of air toward the plurality of flow paths and supplies the air to the plurality of flow paths.

[0063] In the present embodiment, if the temperature of the cylindrical member 101 exceeds a preset temperature, the power supply to the heating device 105 is stopped, and the air supply based on the blower device 107 is started. As a result, the temperature of the cylindrical member 101 decreases.

[0064] In addition, when the air supply is performed based on the blower device 107, it may be set to a state where the power supply to the heating device 105 is not stopped and the power supply to the heating device 105 is continued. Moreover, when the air supply is performed based on the blower device 107, the power supplied to the heating device 105 may be reduced without stopping the power supply to the heating device 105.

[0065] In the present embodiment, if the processing in the extrusion molding machine 1 is continuously performed, the temperature of the cylindrical member 101 gradually rises.

[0066] Specifically, in the present embodiment, due to the shear force applied to the resin by the conveying member 104 composed of a screw, the temperature of the resin and the conveying member 104 rises, and accordingly, the temperature of the cylindrical member 101 also gradually rises.

[0067] In the present embodiment, if the temperature of the cylindrical member 101 rises and exceeds a preset temperature, the blowing based on the blower device 107 is started. As a result, the temperature of the cylindrical member 101 decreases.

[0068] More specifically, in the present embodiment, a temperature sensor (not shown) for detecting the temperature of the cylindrical member 101 is provided, and if the temperature detected by the temperature sensor exceeds a preset temperature, the blowing based on the blower device 107 is started.

[0069] As a result, air, which is an example of a cooling medium, is supplied to a flow path (described later) provided in the heating device 105, so that the temperature of the cylindrical member 101 decreases. Accordingly, the temperature of the resin in the cylindrical member 101 also decreases.

[0070] In the present embodiment, the control of the power supply to the heating device 105 and the control of the output of the blower device 107 are performed so that the temperature of the resin falls within a preset temperature range.

[0071] In addition, in the present embodiment, the case where air is used as the cooling medium has been described as an example, but the cooling medium is not limited to air.

[0072] There is no particular limitation on the cooling medium, and it can be either a gas or a liquid.

[0073] As the gas, for example, air can be cited, but it is not limited thereto, and a gas composed of components other than air can also be used. And as the liquid, for example, water can be cited, but as the cooling medium, a liquid composed of components other than water such as oil can also be used.

[0074] Figure 2 It is a perspective view when observing the heating device 105 from obliquely above. In addition, in this Figure 2 the illustration of the heat source (described later) is omitted.

[0075] The heating device 105 is provided with an annular fixing member 109 fixed to the cylindrical member 101. The fixing member 109 is disposed around the cylindrical member 101 and at a position opposed to the outer peripheral surface 101E of the cylindrical member 101.

[0076] The fixing member 109 is composed of a plurality of constituent members.

[0077] Specifically, the fixing member 109 is composed of a first constituent member 109A as an example of one constituent member and a second constituent member 109B as an example of another constituent member.

[0078] In the circumferential direction of the cylindrical member 101, the first constituent member 109A and the second constituent member 109B are provided adjacent to each other.

[0079] In the present embodiment, the position of the first constituent member 109A in the circumferential direction of the cylindrical member 101 is different from the position of the second constituent member 109B in the circumferential direction of the cylindrical member 101.

[0080] The first constituent member 109A and the second constituent member 109B are each formed in a semicircular shape.

[0081] Figure 3 It is a view showing an example of the fixing method of the first constituent member 109A and the second constituent member 109B.

[0082] For example, as Figure 3 shown, the fixing of the first constituent member 109A and the second constituent member 109B is performed using fastening members.

[0083] In Figure 3In the example shown, the first component 109A and the second component 109B are fixed by fixing the nut 109D to the bolt 109H passing through the through holes (not shown) provided in the first component 109A and the second component 109B.

[0084] In addition, in the present embodiment, the fixing member 109 is composed of two components, but is not limited thereto, and the fixing member 109 may also be composed of three or more components. Also, the fixing member 109 may be composed of a single annular member.

[0085] Moreover, the fixing of the components to each other is not limited to the fixing using bolts and nuts, and other known fixing methods may be used to fix the components to each other.

[0086] Figure 4 For the cross-sectional view of the heating device 105 along Figure 2 the line IV-IV.

[0087] A heating source 111 is provided in the heating device 105.

[0088] In the present embodiment, heating sources 111 are provided in the first component 109A and the second component 109B respectively, and a plurality (two in the present embodiment) of heating sources 111 are provided in one fixing member 109.

[0089] The heating source 111 is supported by the first component 109A and the second component 109B that constitute the fixing member 109.

[0090] The heating source 111 is composed of, for example, an electric heating wire that generates heat by passing an electric current. In addition, there is no particular limitation on the type of the heating source 111, and a heating source 111 that generates heat in other ways may also be used as the heating source 111.

[0091] The heating sources 111 provided in the first component 109A and the second component 109B are arranged at positions opposed to the outer peripheral surface 101E of the cylindrical member 101.

[0092] Moreover, the heating source 111 provided in the first component 109A is provided inside the first component 109A, and the heating source 111 provided in the second component 109B is provided inside the second component 109B.

[0093] When manufacturing the first component 109A and the second component 109B, for example, after a heating source 111 is pre-configured in a mold, molten metal that forms the basis of the first component 109A and the second component 109B is poured into the mold. When the molten metal solidifies, the first component 109A and the second component 109B with the heating source 111 configured inside are completed.

[0094] The first component 109A and the second component 109B of the present embodiment are parts made of a metal material and become parts with excellent heat conduction.

[0095] In the present embodiment, the heating source 111 is arranged at a position opposed to the outer peripheral surface 101E of the cylindrical member 101.

[0096] Here, "the heating source 111 is arranged at a position opposed to the outer peripheral surface 101E of the cylindrical member 101" does not limit to directly arranging the heating source 111 at a position opposed to the cylindrical member 101.

[0097] The manner of "the heating source 111 is arranged at a position opposed to the outer peripheral surface 101E of the cylindrical member 101" includes not only the manner where there are no other components between the heating source 111 and the outer peripheral surface 101E of the cylindrical member 101, but also the manner where other components are arranged between the heating source 111 and the outer peripheral surface 101E of the cylindrical member 101.

[0098] The manner of "the heating source 111 is arranged at a position opposed to the outer peripheral surface 101E of the cylindrical member 101" includes the manner where the heating source 111 is opposed to the cylindrical member 101 with heat-conducting excellent parts such as the first component 109A and the second component 109B of the present embodiment in between.

[0099] In addition, it is more preferable to embed the heating source 111 in heat-conducting excellent parts such as the first component 109A and the second component 109B, so that the heat-conducting excellent part is in direct contact with the heating source 111.

[0100] And, it is further preferable to adopt a manner where heat-conducting excellent parts such as the first component 109A and the second component 109B are in direct contact with the cylindrical member 101.

[0101] As Figure 2 shown, the fixing member 109 includes: an opposed surface 109G that is opposed to the outer peripheral surface 101E of the cylindrical member 101; and an opposite surface 109H that is located on the side opposite to the opposed surface 109G.

[0102] Moreover, in the present embodiment, a plurality of flow paths 130 through which a cooling medium passes are provided on the opposing surface 109G of the fixed member 109. In the present embodiment, a plurality of flow paths 130 are provided in the first component 109A and the second component 109B, respectively.

[0103] In the present embodiment, a plurality of grooves 131 are provided on the opposing surface 109G of the fixed member 109 at a position opposing the outer peripheral surface 101E of the cylindrical member 101, and the plurality of grooves 131 constitute the plurality of flow paths 130.

[0104] In the present embodiment, grooves 131 are provided on the fixed member 109. As a result, in each of the first component 109A and the second component 109B, a protruding portion 133 protruding toward the outer peripheral surface 101E of the cylindrical member 101 is provided between adjacent grooves 131.

[0105] In each of the first component 109A and the second component 109B, a plurality of (two in the present embodiment) protruding portions 133 are provided.

[0106] Moreover, the plurality of protruding portions 133 provided in the first component 109A and the second component 109B, respectively, are provided in a substantially parallel manner to each other and are arranged along the circumferential direction of the cylindrical member 101.

[0107] In the present embodiment, the front end portion 133A in the protruding direction of the protruding portion 133 contacts the outer peripheral surface 101E of the cylindrical member 101.

[0108] In each of the first component 109A and the second component 109B, at a position where one end portion 109X and the other end portion 109Y in the axial direction of the fixed member 109 are located, a contact portion 134 extending along the circumferential direction of the fixed member 109 and contacting the outer peripheral surface 101E of the cylindrical member 101 is provided.

[0109] The front end portion 133A and the contact portion 134 each of the protruding portions 133 are constituted by a part of the opposing surface 109G of the fixed member 109.

[0110] In the present embodiment, the heat from the heat source 111 is transferred to the cylindrical member 101 through the protruding portion 133 and the contact portion 134.

[0111] As described above, the flow paths 130 provided in the first component 109A and the second component 109B, respectively, are provided in a form extending along the circumferential direction of the cylindrical member 101 and being parallel to each other.

[0112] As Figure 4As shown, the flow path 130 is disposed in the radial direction of the cylindrical member 101 at a position closer to the outer peripheral surface 101E of the cylindrical member 101 than the heating source 111.

[0113] And, as described above, the flow path 130 is arranged along the circumferential direction of the cylindrical member 101.

[0114] In the present embodiment, the cooling medium for cooling the cylindrical member 101 passes through the flow path 130. Thereby, the cylindrical member 101 is cooled, and accordingly, the temperature of the resin in the cylindrical member 101 drops.

[0115] And, as Figure 2 shown, an inlet portion 121 for the cooling medium is provided on the fixing member 109 toward the plurality of flow paths 130. And an outlet portion 122 for the cooling medium that has passed through the plurality of flow paths 130 is provided on the fixing member 109.

[0116] Figure 5 FIG. is a view when observing the second component 109B from the direction of the arrow V shown in Figure 2 . Additionally, here, the second component 109B is described, but the structure of the first component 109A may be the same as the structure of the second component 109B.

[0117] In the present embodiment, as Figure 5 shown, a common inlet portion 121 is provided for the plurality of flow paths 130. Additionally, it is not limited to providing the common inlet portion 121 in this way, and the inlet portion 121 may also be provided individually corresponding to the flow paths 130.

[0118] And, in the present embodiment, the outlet portion 122 is also made common, and the cooling medium that has passed through the plurality of flow paths 130 is discharged from the common outlet portion 122. Additionally, similar to the inlet portion 121, the outlet portion 122 may also be provided individually corresponding to the flow paths 130.

[0119] The flow path of the cooling medium sent out by the air supply device 107 (refer to Figure 1 ) becomes one flow path until the inlet portion 121.

[0120] In the present embodiment, the inlet portion 121 becomes a branch portion of the flow path, and the flow path branches at this branch portion. A plurality of flow paths 130 are provided on the downstream side of the branch portion, and the cooling medium passes through the plurality of flow paths 130 and moves downstream.

[0121] After that, the flow paths merge at the outlet portion 122 and again become one flow path at the outlet portion 122. Then, the cooling medium that has passed through this one flow path is discharged to the outside of the fixed member 109.

[0122] In the present embodiment, it is in the following form: in the moving direction of the cooling medium, one flow path is provided on the upstream side of the fixed member 109 as described above, and on the upstream side of the fixed member 109, a flow path having a number smaller than the number of the flow paths 130 provided inside the fixed member 109 is provided.

[0123] In the present embodiment, the cooling medium is supplied to the fixed member 109 using this smaller number of flow paths.

[0124] In contrast, inside the fixed member 109, flow paths 130 having a number larger than this smaller number of flow paths are provided, and at the installation site of the heating device 105, the cooling medium is supplied to the larger number of flow paths 130 to cool the cylindrical member 101.

[0125] And, in the present embodiment, as Figure 2 shown, the inlet portion 121 is formed by the gap 500 existing between the first component 109A and the second component 109B.

[0126] Similarly, in the present embodiment, for the outlet portion 122, the outlet portion 122 can also be formed by the gap 500 existing between the first component 109A and the second component 109B.

[0127] The first component 109A and the second component 109B are adjacent to each other in the circumferential direction of the cylindrical member 101.

[0128] In the present embodiment, the cooling medium is supplied to the fixed member 109 and discharged from the fixed member 109 through the gap 500 between the adjacent first component 109A and second component 109B.

[0129] Figure 6 in (A), Figure 6 in (B) are diagrams showing the inlet portion 121 and the outlet portion 122.

[0130] Specifically, Figure 6 in (A) is a diagram when observing the inlet portion 121 from the direction indicated by the arrow VIA in Figure 2 , and Figure 6 in (B) is a diagram when observing the outlet portion 122 from the direction indicated by the arrow VIB in Figure 2 .

[0131] As shown in Figure 2 FIG. 1, the first component 109A has one end 201 and the other end 202 with different positions in the circumferential direction of the cylindrical component 101, and the second component 109B also has one end 301 and the other end 302 with different positions in the circumferential direction of the cylindrical component 101.

[0132] As shown in Figure 6 (A) of FIG. 2, notches 305 are formed at one end 201 of the first component 109A and the other end 302 of the second component 109B. In the present embodiment, the gap 500 is formed by the notch 305, and the inlet portion 121 is formed by the gap 500.

[0133] And, as shown in Figure 6 (B) of FIG. 2, notches 305 are also formed at the other end 202 of the first component 109A and one end 301 of the second component 109B. In the present embodiment, the gap 500 is formed by the notch 305, and the outlet portion 122 is formed by the gap 500.

[0134] In addition, in the present embodiment, notches 305 are provided at both the one end 201 of the first component 109A and the other end 302 of the second component 109B, but notches 305 may be provided only at one of the one end 201 of the first component 109A and the other end 302 of the second component 109B.

[0135] Similarly, notches 305 may be provided only at one of the other end 202 of the first component 109A and one end 301 of the second component 109B.

[0136] In the present embodiment, as shown in Figure 4 FIG. 3, the outlet portion 122 is provided on the side opposite to the side where the inlet portion 121 is provided with the axis 109C of the cylindrical component 101 interposed therebetween.

[0137] In the present embodiment, in the case of assuming a virtual plane 109K that extends along the axis 109C of the cylindrical component 101 and passes through the inlet portion 121, the outlet portion 122 is located on the virtual plane 109K.

[0138] In other words, in the present embodiment, both the inlet portion 121 and the outlet portion 122 are located on the virtual plane 109K that extends along the axis 109C of the cylindrical component 101.

[0139] And, in the present embodiment, as shown in Figure 5As shown, in the case of assuming a plane 109M orthogonal to the axial direction of the cylindrical member 101, both the inlet portion 121 and the outlet portion 122 are located on one such common plane 109M.

[0140] Moreover, in the present embodiment, between Figure 4 a plurality of flow paths 130 are provided in each of the two regions 300, namely the first region 300U and the second region 300R, which face each other across the

[0141] virtual plane 109K shown.

[0142] That is to say, in the present embodiment, in the case of assuming the virtual plane 109K, a plurality of flow paths 130 are provided in each of the two regions 300, namely the first region 300U and the second region 300R, which face each other across the virtual plane 109K.

[0143] In the present embodiment, a plurality of flow paths 130 are provided in each of the first component member 109A located on one region side, namely the first region 300U side, and the second component member 109B located on the other region side, namely the second region 300R side. As a result, a plurality of flow paths 130 are provided in each of these two regions 300.

[0144] Accordingly, in the present embodiment, the cooling medium that enters from the inlet portion 121 passes through these two regions 300 respectively and heads towards the outlet portion 122. Accordingly, compared with the configuration in which the cooling medium only passes through one region 300, the cooling efficiency of the cylindrical member 101 is improved.

[0145] For example, it may also be configured such that, in the case of assuming a virtual plane (not shown) extending along the axis 109C of the cylindrical member 101, both the inlet portion 121 and the outlet portion 122 are provided in one of the two regions facing each other across the virtual plane.

[0146] Figure 7 (A) in Figure 7 (B) in is a cross-sectional view of the second component member 109B.

[0147] Figure 7 (A) in is a cross-sectional view of the second component member 109B along line VIIA-VIIA of Figure 4 . Moreover, Figure 7 (B) in is a cross-sectional view of the second component member 109B along line VIIB-VIIB of Figure 4 .

[0148] In addition, although the second component 109B will be described here, the structure of the first component 109A is the same as that of the second component 109B.

[0149] In the present embodiment, as shown in (B) of Figure 7 , the heating source 111 composed of a heating wire has a first portion 111A and a second portion 111B extending in the circumferential direction of the cylindrical member 101 (not shown in (B) of Figure 7 ).

[0150] Furthermore, the heating source 111 has a third portion 111C that extends in the axial direction of the cylindrical member 101 and connects the first portion 111A and the second portion 111B.

[0151] The first portion 111A and the second portion 111B are arranged in a substantially parallel relationship with each other. In the present embodiment, current flows from one of the first portion 111A and the second portion 111B toward the other portion.

[0152] More specifically, current flows from one portion through the third portion 111C to the other portion. Thereby, the heating source 111 generates heat.

[0153] In the present embodiment, as shown by reference numeral 580 in (A) of Figure 7 , the first portion 111A and the second portion 111B of the heating source 111 are provided between the protruding portion 133 and the opposite surface 109H.

[0154] In other words, in the present embodiment, when the two protruding portions 133 and the first portion 111A and the second portion 111B of the heating source 111 are projected onto a virtual plane 109N extending in the axial direction of the cylindrical member 101, one protruding portion 133 overlaps with the first portion 111A, and the other protruding portion 133 overlaps with the second portion 111B.

[0155] Furthermore, in the present embodiment, as shown in (A) of Figure 7 and (B) of Figure 7 , the first portion 111A and the second portion 111B are arranged along the protruding portion 133.

[0156] As shown in (B) of Figure 7 , the first portion 111A is arranged along one of the two protruding portions 133, and the second portion 111B is arranged along the other protruding portion 133. In the present embodiment, the first portion 111A and the second portion 111B are arranged in a substantially parallel manner.

[0157] In the present embodiment, similar to the case of the groove 131 (refer toFigure 7 As compared with the case where the first part 111A and the second part 111B are arranged between (A) in and the opposite surface 109H, and the first part 111A and the second part 111B are arranged along the groove 131, it becomes easier to transfer heat from the heating source 111 to the cylindrical member 101, and the heating efficiency of the cylindrical member 101 is improved.

[0158] Here, as an example of the way in which the first part 111A and the second part 111B are substantially parallel, the following can be cited: a way in which heating sources such as the first part 111A and the second part 111B are arranged along the axial direction of the cylindrical member 101; a way in which a plurality of heating sources are arranged by bending the heating source without distorting it in such a way that adjacent parts in the heating source face the same direction; a way in which the heating source is bent multiple times without distorting it in such a way that adjacent parts in the heating source face the same direction, etc. The way of arranging a single heating source in a spiral shape is not included in this substantially parallel way.

[0159] Figure 12 A diagram showing another configuration example of the second component 109B. Figure 12 And Figure 7 Similarly to (A) in , it shows the state of the cross-section of the second component 109B along the VIIA-VIIA line of . And, similarly to the above, here, the second component 109B will be described, but the structure of the first component 109A is also the same as the structure of the second component 109B. Figure 4 In this configuration example shown in , as indicated by reference numeral 581, the first part 111A is buried in one of the two protruding parts 133 provided, and the second part 111B is buried in the other protruding part 133.

[0160] In Figure 12 In this configuration example shown, as compared with the configuration example shown in , the first part 111A and the second part 111B are closer to the cylindrical member 101, and the heating efficiency of the cylindrical member 101 is improved.

[0161] In this configuration example, as compared with the configuration example shown in Figure 7 shown, the first part 111A and the second part 111B are closer to the cylindrical member 101, and the heating efficiency of the cylindrical member 101 is improved.

[0162] Although the description has been omitted above, as shown in Figure 12 shown, the heating source 111 has one end portion 111E located on the outer peripheral surface 101E side of the cylindrical member 101 and the other end portion 111F located on the side opposite to the outer peripheral surface 101E side.

[0163] The heating source 111 has a first part 111A and a second part 111B. However, as indicated by reference numeral 581, the first part 111A and the second part 111B have one end 111E on the outer peripheral surface 101E side of the cylindrical member 101 and the other end 111F on the side opposite to the outer peripheral surface 101E side.

[0164] In Figure 12 In the illustrated configuration example, a part of the groove 131 forming the flow path, i.e., the part indicated by reference numeral 595, is arranged on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the first part 111A and the second part 111B constituting the heating source 111.

[0165] In the present embodiment, the slanted part indicated by reference numeral 595 becomes a part of the groove 131 arranged on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the first part 111A and the second part 111B.

[0166] Here, in Figure 7 In the illustrated configuration example, as Figure 7 shown by reference numeral 580 in (A) thereof, in the radial direction of the cylindrical member 101, all parts of the groove 131 are located on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the other end 111F of the heating source 111. And, in Figure 7 In the illustrated configuration example, all parts of the groove 131 are located on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the one end 111E of the heating source 111. And, in Figure 7 In the illustrated configuration example, all parts of the groove 131 are located on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the central part 111X of the first part 111A and the central part 111X of the second part 111B constituting the heating source 111.

[0167] Regarding the arrangement of the groove 131 and the heating source 111, it is not limited to Figure 7 the manner shown in Figure 12 It may be such that, as shown in Figure 12 at least a part of the groove 131 is located on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the heating source 111. In the illustrated configuration example in

[0168] In addition, when forming the groove 131, as shown in Figure 7 in (A) thereof, if the groove 131 is formed on the side closer to the outer peripheral surface 101E of the cylindrical member 101 than the central part 111X, the influence of the heating source 111 on cooling becomes smaller, and the cooling based on the groove 131 functions more effectively.

[0169] Further, from the viewpoint of reducing the influence of the heating source 111 on cooling, a groove 131 can be formed on a side closer to the outer peripheral surface 101E of the cylindrical member 101 than one end portion 111E. In this case, the cooling based on the groove 131 functions more effectively.

[0170] Moreover, if the entire groove 131 that functions as a flow path is disposed on a side closer to the outer peripheral surface 101E of the cylindrical member 101 than one end portion 111E, the cooling based on the groove 131 functions more effectively.

[0171] Figure 8 (A) in Figure 8 (B) in is a view for explaining a comparative example of the heating device 105.

[0172] Figure 8 (A) in is a perspective view of the heating device 105 of the comparative example, Figure 8 (B) in is a view when viewing the heating device 105 of the comparative example from the direction indicated by arrow VIIIB in Figure 8 (A). In addition, the illustration of the heating source 111 is omitted in Figure 8 (A).

[0173] In this comparative example, as shown in Figure 8 (A) in Figure 8 (B), a plurality of protrusions 333 extending in the circumferential direction of the fixing member 109 are provided on the opposite surface 109H of the fixing member 109.

[0174] Moreover, in this comparative example, the groove 131 described above is not provided on the opposing surface 109G of the fixing member 109.

[0175] In this comparative example, as shown in Figure 8 (B), a plurality of protrusions 333 are provided on the outer side of the heating source 111 in the radial direction of the fixing member 109.

[0176] In this comparative example, a cooling medium is supplied to the gap 335 existing between the protrusions 333 (refer to Figure 8 (A)), and the cylindrical member 101 (not shown in Figure 8 ) is cooled via the fixing member 109.

[0177] In this comparative example, the outer diameter of the heating device 105 becomes larger than that of the configuration of the present embodiment described above. In this case, the conveying device 10 (refer to Figure 1 ) becomes larger, and problems such as restrictions on the arrangement of the conveying device 10 are likely to occur.

[0178] In contrast, in the present embodiment, as described above, a protrusion 133 is provided radially inside the heating source 111 with respect to the fixed member 109. In other words, in the present embodiment, the protrusion 133 is provided closer to the cylindrical member 101 than the heating source 111. In this case, the enlargement of the heating device 105 is suppressed.

[0179] In Figure 8 (B) shows Figure 2 the outer diameter of the heating device 105 of the present embodiment shown. Figure 8 The dimension L indicated by the symbol 337 in (B) in

[0180] When a configuration in which the protrusion 333 is provided outside the heating source 111 is adopted, as Figure 8 shown in (B), the outer diameter of the heating device 105 becomes larger than that of the configuration of the present embodiment.

[0181] In contrast, when a configuration in which the protrusion 133 is provided inside the heating source 111 as in the present embodiment is adopted, the outer diameter of the heating device 105 becomes smaller.

[0182] And, in the heating device 105 of the comparative example shown in Figure 8 (A) and Figure 8 (B), the heating efficiency of the cylindrical member 101 is likely to decrease compared with the heating device 105 of the present embodiment.

[0183] In the heating device 105 of the comparative example, even when power is supplied to the heating source 111 and the temperature of the heating device 105 itself rises, the heat generated by the heating source 111 escapes through the protrusion 333, and thus the temperature of the heating device 105 is difficult to rise.

[0184] In contrast, in the present embodiment, as Figure 2 shown, the protrusion 133 and the groove 131 are provided on the opposing surface 109G side corresponding to the inner peripheral surface of the fixed member 109.

[0185] In this case, the heat dissipation from the protrusion 133 and the groove 131 is reduced, and thus the temperature of the heating device 105 itself becomes easy to rise. In this case, the heating efficiency of the cylindrical member 101 is improved.

[0186] In the present embodiment, the groove 131 is formed on the opposing surface 109G corresponding to the inner peripheral surface of the fixed member 109. In this case, the contact area between the fixed member 109 and the cylindrical member 101 is reduced. Due to the reduction of this contact area, the heating efficiency of the cylindrical member 101 may decrease.

[0187] However, in the present embodiment, as described above, the protrusions 133 and the grooves 131 are not exposed, and heat dissipation through the protrusions 133 and the grooves 131 is reduced.

[0188] As a result, in the present embodiment, although the contact area between the fixing member 109 and the cylindrical member 101 is reduced, the heating efficiency of the cylindrical member 101 can be improved as a whole for the heating device 105.

[0189] And, in Figure 8 the heating device 105 of the comparative example shown, the efficiency of cooling the cylindrical member 101 is lower than that of the heating device 105 of the present embodiment.

[0190] In this comparative example, the cooling medium from the air supply device 107 is also supplied to the heating device 105 to cool the cylindrical member 101. However, in this case, since the cylindrical member 101 is cooled via the fixing member 109, the cooling efficiency of the cylindrical member 101 decreases.

[0191] In contrast, in the present embodiment, the cooling medium is directly supplied to the cylindrical member 101.

[0192] Specifically, in the present embodiment, the cooling medium passing through the flow path 130 formed in the fixing member 109 (refer to Figure 2 ) is guided by the outer peripheral surface 101E of the cylindrical member 101 and moves while being in direct contact with the outer peripheral surface 101E.

[0193] In this case, the cooling efficiency of the cylindrical member 101 is higher than that of the cylindrical member 101 in the heating device 105 of the comparative example.

[0194] Figure 9 For a cross-sectional view of the second component 109B along the IX-IX line of Figure 5 .

[0195] In the present embodiment, the flow path 130 is located in a space surrounded by the bottom surface 131A of the groove 131, the side surfaces 133D respectively possessed by the two protrusions 133 located at the two adjacent positions on each side of the groove 131, and the outer peripheral surface 101E of the cylindrical member 101.

[0196] In this case, the flow path 130 is in a state of being formed as a closed space, and the moving speed of the cooling medium passing through the flow path 130 is greater than that in the case where a part of the flow path 130 is open.

[0197] When the moving speed of the cooling medium becomes greater, the cooling efficiency of the cylindrical member 101 is improved compared to the case where the moving speed of the cooling medium does not become greater.

[0198] Here, although the illustration is omitted, as another comparative example, a configuration in which one flow path is provided around the cylindrical member 101 and is formed in a spiral shape can also be considered.

[0199] In this case, the position of the inlet portion of the flow path and the position in the axial direction of the cylindrical member 101 are different from the position of the outlet portion of the flow path and the position in the axial direction of the cylindrical member 101.

[0200] In contrast, in the present embodiment, as Figure 5 shown, the position of the inlet portion 121 of the flow path 130 and the position in the axial direction of the cylindrical member 101 are the same as the position of the outlet portion 122 of the flow path 130 and the position in the axial direction of the cylindrical member 101.

[0201] In a configuration in which only one spiral flow path is provided as in the comparative example, as the cooling medium flows in the flow path, the temperature of the cooling medium gradually rises, and the cooling efficiency of the cylindrical member 101 decreases in the latter half of the flow path.

[0202] Moreover, in a configuration in which only one spiral flow path is provided, the flow path becomes longer, and pressure loss is likely to occur.

[0203] In contrast, in the present embodiment, the cooling medium from the air supply device 107 flows through the plurality of flow paths 130. Thus, compared with the case where the cooling medium flows through only one flow path, the temperature rise of the cooling medium is suppressed, and the cooling efficiency of the cylindrical member 101 is improved.

[0204] Furthermore, in the present embodiment, the length of each of the flow paths 130 is less than the length of the circumference of the cylindrical member 101 and is shorter than the case where the above-described one spiral flow path is provided. In this case, the pressure loss becomes smaller.

[0205] Moreover, as another mode of the heating device 105, a heating source 111 composed of a belt heater or the like can be provided at a position facing the opposite surface 109H of the fixed member 109, instead of providing the heating source 111 inside the fixed member 109 (refer to Figure 2 ).

[0206] In the above-described embodiment, a heating source 111 is provided inside the fixed member 109, and the heating source 111 is located between the opposing surface 109G and the opposite surface 109H of the fixed member 109.

[0207] The arrangement mode of the heating source 111 is not limited to this. As described above, a heating source 111 composed of a belt heater or the like can also be provided at a position facing the opposite surface 109H of the fixed member 109.

[0208] In this case, a heating source 111 is provided on the outermost layer of the heating device 105.

[0209] In the fixing member 109, a flow path 130 may be provided on the side closer to the cylindrical member 101 than the heating source 111, or on the basis that the heating source 111 is provided on the outermost layer of the heating device 105, a flow path 130 may be provided on the side closer to the cylindrical member 101 than the heating source 111.

[0210] Furthermore, a more preferable method is to provide the heating source 111 inside the fixing member 109 and to position the heating source 111 between the opposing surface 109G and the opposite surface 109H of the fixing member 109.

[0211] In the method where the heating source 111 is located on the outermost layer of the fixing member 109, the distance between the outer peripheral surface 101E of the cylindrical member 101 and the heating source 111 increases, and the heating efficiency of the cylindrical member 101 may decrease.

[0212] In contrast, in the method where the heating source 111 is located inside the fixing member 109, the distance between the outer peripheral surface 101E of the cylindrical member 101 and the heating source 111 decreases, and the heating efficiency of the cylindrical member 101 increases.

[0213] Figure 10 For the cross-sectional view of the conveying device 10 along the Figure 1 X-X line.

[0214] As Figure 10 shown, the air supply device 107 is provided with: a fan 107A that sends out a cooling medium; and a tubular guide member 107B through which the air sent out by the fan 107A passes and guides the air.

[0215] In the present embodiment, the opening 107C at the front end of the guide member 107B is located at the position opposite to the inlet portion 121, and the cooling medium from the opening 107C is supplied to the flow path 130 provided inside the fixing member 109 through the inlet portion 121.

[0216] In the present embodiment, as described above, the cooling medium passes through the first region 300U and the second region 300R that face each other across the plane 109K passing through both the inlet portion 121 and the outlet portion 122 and heads toward the outlet portion 122.

[0217] Figure 11 It is a diagram showing another configuration example of the conveying device 10.

[0218] In Figure 11In the illustrated configuration example, a part of the cooling medium sent out by the air supply device 107 is also supplied to the opposite surface 109H of the fixed member 109.

[0219] In this configuration example, the opening 107C of the guide member 107B is larger than Figure 10 the opening 107C in the illustrated configuration example. Not only is the inlet portion 121 located at the opposing position of the opening 107C, but also the portion of the fixed member 109 other than the inlet portion 121 is located at the opposing position of the opening 107C.

[0220] Specifically, a part of the opposite surface 109H of the fixed member 109 is also located at the opposing position of the opening 107C. In other words, a part of the outer peripheral surface of the fixed member 109 formed in an annular shape is also located at the opposing position of the opening 107C.

[0221] Thus, in this configuration example, the cooling medium sent out by the air supply device 107 is supplied not only to the inlet portion 121 but also to the opposite surface 109H of the fixed member 109. In other words, the cooling medium is also supplied to the outer peripheral surface of the fixed member 109.

[0222] Thus, in this configuration example, the fixed member 109 is cooled not only from the opposing surface 109G side but also from the opposite surface 109H side.

[0223] A guide portion 401 is provided at the opposing position of the opposite surface 109H of the fixed member 109. The guide portion 401 is arranged along the opposite surface 109H and guides the cooling medium from the opening 107C.

[0224] In this configuration example, through the guide portion 401, the cooling medium moves along the opposite surface 109H of the fixed member 109 to the side where the outlet portion 122 is provided, and the outlet portion 122 is located on the side opposite to the side where the inlet portion 121 is provided.

[0225] In Figure 11 the illustrated configuration example, the air supply device 107, which is an example of a supply mechanism arranged on the upstream side of the opposite surface 109H in the moving direction of the cooling medium, is used to supply the cooling medium to the inlet portion 121 and the opposite surface 109H.

[0226] The supply of the cooling medium to the inlet portion 121 and the opposite surface 109H is not limited to the method using the air supply device 107. It can also be performed using a suction device (not shown) arranged on the downstream side of the inlet portion 121 and the opposite surface 109H in the moving direction of the cooling medium. In this case, through the suction device, which is another example of the supply mechanism, the cooling medium is supplied to the inlet portion 121 and the opposite surface 109H.

[0227] Explanation of Symbols

[0228] 10 - Conveyor device, 101 - Cylindrical member, 101E - Outer peripheral surface, 104 - Conveyor member, 105 - Heating device, 107 - Air supply device, 109 - Fixing member, 109A - First component, 109B - Second component, 109G - Opposing surface, 109H - Opposite surface, 109K - Plane, 111 - Heating source, 121 - Inlet section, 122 - Outlet section, 130 - Flow path, 131 - Groove, 300R - Second region, 300U - First region, 500 - Gap.

Claims

1. A conveying device, comprising: a conveying mechanism for conveying resin; a cylindrical member through which the resin conveyed by the conveying mechanism passes; a heating source disposed at an opposing position on the outer peripheral surface of the cylindrical member for heating the interior of the cylindrical member; and a flow path, at least a part of which is disposed on a side closer to the outer peripheral surface than the heating source in the radial direction of the cylindrical member, through which a medium for cooling the cylindrical member passes, wherein the flow paths are arranged along the circumferential direction of the cylindrical member and a plurality of them are provided.

2. The conveying device according to claim 1, wherein Further comprising: a fixing member disposed at an opposing position on the outer peripheral surface of the cylindrical member and fixed relative to the cylindrical member, supporting the heating source, and provided with a plurality of the flow paths, an inlet portion for the medium of the plurality of flow paths is provided on the fixing member, a common inlet portion is provided for the plurality of flow paths.

3. The conveying device according to claim 2, wherein, an outlet portion for the medium that has passed through the plurality of flow paths is provided on the fixing member, the medium that has passed through the plurality of flow paths is discharged from the common outlet portion.

4. The conveying device according to claim 1, wherein, Further comprising: a fixing member disposed at an opposing position on the outer peripheral surface of the cylindrical member and fixed relative to the cylindrical member, supporting the heating source, and provided with a plurality of the flow paths, an inlet portion for the medium of the plurality of flow paths is provided on the fixing member, the fixing member is composed of a plurality of constituent members having different positions in the circumferential direction of the cylindrical member, the inlet portion is formed by a gap existing between one constituent member and another constituent member adjacent to each other in the circumferential direction.

5. The conveying device according to claim 1, wherein Further comprising: a fixing member disposed at an opposing position on the outer peripheral surface of the cylindrical member and fixed relative to the cylindrical member, supporting the heating source, and provided with a plurality of the flow paths, an outlet portion for the medium that has passed through the plurality of flow paths is provided on the fixing member, the fixing member is composed of a plurality of constituent members having different positions in the circumferential direction of the cylindrical member, the outlet portion is formed by a gap existing between one constituent member and another constituent member adjacent to each other in the circumferential direction.

6. The conveying device according to claim 1, wherein, Further comprising: a fixing member disposed at an opposing position on the outer peripheral surface of the cylindrical member and fixed relative to the cylindrical member, supporting the heating source, and provided with a plurality of the flow paths, an inlet portion for the medium of the plurality of flow paths and an outlet portion for the medium that has passed through the plurality of flow paths are provided on the fixing member, the outlet portion is provided on a side opposite to the side where the inlet portion is provided with the axis of the cylindrical member interposed therebetween.

7. The conveying device according to claim 6, wherein, in the case of imagining a virtual plane extending along the axis of the cylindrical member and passing through both the inlet portion and the outlet portion, the plurality of flow paths are respectively provided in two regions opposed to each other with the virtual plane interposed therebetween.

8. The conveying device according to claim 1, wherein, A plurality of the flow paths are arranged in a form that extends circumferentially of the cylindrical member and are substantially parallel at positions that are different from each other in the axial direction of the cylindrical member.

9. The conveying device according to claim 1, wherein, Further provided with: A fixing member, disposed at a position opposed to the outer peripheral surface of the cylindrical member and fixed relative to the cylindrical member, supporting the heating source, and provided with a plurality of the flow paths, A plurality of grooves are provided at a portion of the fixing member that is opposed to the outer peripheral surface, and the plurality of flow paths are formed by the plurality of grooves.

10. The conveying device according to claim 1, wherein, Further provided with: A fixing member, disposed at a position opposed to the outer peripheral surface of the cylindrical member and fixed relative to the cylindrical member, provided with a plurality of the flow paths and having the heating source disposed therein, and having an opposed surface opposed to the outer peripheral surface and a reverse surface located on a side opposite to the opposed surface; and A supply mechanism that supplies the medium to the plurality of flow paths, A part of the medium that is directed toward the plurality of flow paths by the supply mechanism is supplied to the reverse surface of the fixing member.

11. A heating device that heats resin passing through a cylindrical member, the heating device comprising: A heating source, disposed at a position opposed to the outer peripheral surface of the cylindrical member, for heating the inside of the cylindrical member; and A flow path, at least a part of which is disposed on a side closer to the outer peripheral surface than the heating source in the radial direction of the cylindrical member, through which a medium for cooling the cylindrical member passes, The flow paths are arranged circumferentially of the cylindrical member, and a plurality of them are provided.

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