JP2007083633A - Manufacturing method of fuel tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the peripheral structure of a fuel tank by avoiding or suppressing the use of a tube, and to reduce a cost for constituting a passage. <P>SOLUTION: The fuel tank is equipped with: a tank main body 10 made of a resin; and the passage constituting member 20 made of a resin integrated with the wall 11a of the tank main body 10. A fuel cutting valve 30 (accessory) is attached to the passage constituting member 20 to be connected to the passage 25 of the passage constituting member 20. A joint part 23 is formed in the passage constituting member 20 and connected to a canister. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a resin fuel tank integrally having a passage.

  As shown in FIG. 9, two fuel cut valves 2 are attached to the upper wall 1 of the resin fuel tank at positions separated from each other by welding or the like. The fuel cut valve 2 releases the gas pressure while preventing the fuel from flowing out of the fuel tank.

  The fuel gas discharged from the fuel tank through the fuel cut valve 2 is collected by a canister through a common joint 3. In order to constitute the fuel gas passage, the joint 3 and the discharge part 2 a of the two fuel cut valves 2 are connected by a tube 4, and the joint 3 and the canister are also connected through the tube 4.

The above-described passage configuration is also disclosed in Patent Document 1.
Japanese Utility Model Publication No. 7-22179

As described above, when the tube 4 is used to connect the joint 3 and the fuel cut valve 2, there is a drawback that the structure around the fuel tank is complicated. In addition, the tube 4 must be made of a material having flexibility and a fuel permeation suppressing function, for example, a fluorine-based material, resulting in an increase in cost.
The above-mentioned problem also occurs when a passage that plays another role is formed of a tube.

In order to solve the above-mentioned problems, the present invention provides a resin fuel tank comprising a resin tank main body and a resin passage component integrated with a wall of the tank main body. Alternatively, the gist is that a passage is formed between the passage constituting member and the wall of the tank body.
According to the above configuration, the structure around the fuel tank is simplified, and the use of the tube can be avoided or suppressed, so that the cost can be reduced.

Preferably, an accessory is attached to the wall of the passage member or the tank body, and the accessory is connected to the passage.
According to the said structure, the structure which connects an accessory and a channel | path can be simplified.

Preferably, the accessory part comprises a fuel cut valve that releases gas pressure in the tank body and prevents fuel from flowing out, the valve port of which is continuous with the passage, and the passage component member has a joint portion integrally. is doing.
According to the said structure, the fuel gas from a fuel cut valve can be sent to a canister from a channel | path and a coupling part.

  Preferably, the passage component member has a flange part over the entire circumference, and the peripheral edge of the flange part and the wall of the tank body are integrated with the outer surface being flush with each other. According to this structure, the external appearance property of the attachment location of a channel | path structural member is good.

  Preferably, the outer surface of the wall of the tank body is flush with the outer surface of the passage constituting member. According to this configuration, the outer shape of the fuel tank is further simplified.

  Preferably, the tank body and the passage constituting member have a polyacetal single layer structure. According to this configuration, the material cost and the molding cost can be minimized while having the fuel permeation preventing function.

Further, the present invention provides a method for manufacturing a resin fuel tank, wherein a resin passage component member is incorporated into an injection mold and insert injection molding is performed to mold at least a part of the wall of the tank body. The gist is to integrate the above-mentioned passage constituent member over the entire circumference with respect to the wall and form a passage by the passage constituent member, or to form a passage between the passage constituent member and the wall of the tank body.
According to the above method, the structure around the fuel tank is simplified, and the use of the tube can be avoided or suppressed, so that the cost can be reduced. Further, since the insert injection molding method is used, the entire circumference of the passage constituting member and the wall of the tank body can be integrated easily and reliably.

  Preferably, a flange portion is formed integrally with the passage component member over the entire circumference, and the insert injection molding is performed to integrate the wall of the tank body and the peripheral edge of the flange portion of the passage component member. According to this method, the passage component member can be easily and reliably set in the injection mold using the flange portion.

Preferably, an accessory part having a resin main body formed with a collar part around the entire circumference is prepared, and the accessory part is attached to the passage component member, and the collar part of the channel component member and the collar part of the accessory part are provided. The assembly comprising the passage component and the accessory is assembled into the injection mold and subjected to insert injection molding, so that the passage component and the accessory are attached to the wall of the tank body. Integrate the periphery of the part.
According to the said method, a channel | path component and an accessory can be integrated with the wall of a tank main body easily and reliably via the overlaid collar part.

Preferably, the passage component member is composed of an outer half body and an inner half body, and both the half halves are overlapped to form the passage, and in this overlapped state, it is incorporated into the injection mold and inserted. By molding, the wall of the tank body and the entire circumference of both halves are integrated.
According to the above method, the passage component member can be obtained at low cost by the outer half body and the inner half body.

Preferably, the outer half body and the inner half body have a flange on the entire circumference, and the insert injection molding is performed in a state where the flanges between the two halves are overlapped, so that the wall of the tank body And the peripheral edge of the collar part of both halves.
According to the above method, both halves can be easily and reliably integrated with the wall of the tank main body through the overlaid flanges.

  Preferably, an accessory part is attached to the inner half prior to molding the wall of the tank body by the insert injection molding. Thereby, an accessory can be easily attached to the tank body.

Preferably, the accessory part has a resin main body formed with a flange part over the entire circumference, and the accessory half part is incorporated into an injection mold and insert molding is performed to form the inner half body. At the same time, the inner half and the peripheral edge of the flange of the accessory are integrated.
According to the above method, the inner half can be molded by easily and reliably setting the accessory part on the injection mold using the collar.

Preferably, the outer half body and the inner half body have locking claws over the entire circumference, and the both half claws are connected by locking both locking claws, and the insert injection molding is performed in this connected state. To do.
According to the said method, both halves can be connected easily and can be set to an injection mold easily.

Preferably, an accessory having a resin main body formed with a collar part over the entire circumference is prepared, and the collar part of the accessory part is joined by both halves in the connected state of the outer half body and the inner half body. The assembly composed of both halves and accessory parts is assembled into an injection mold, and the insert molding is performed.
According to the above method, the attachment of the accessory part to the passage component member can be performed easily and at low cost.

Furthermore, the present invention provides a method for manufacturing a resin fuel tank, wherein a resin-made passage component member is abutted against a wall of a resin-made tank body, and an annular shape is provided between the entire circumference of the passage-component member and the wall of the tank body. A recess for filling the resin is formed, the injection resin is filled in the recess, and the wall of the tank body and the passage component are integrated to form a passage in the passage component, or the passage component The gist is to form a passage between the tank body and the wall.
According to the above method, the structure around the fuel tank is simplified, and the use of the tube can be avoided or suppressed, so that the cost can be reduced. Further, by using the injection resin, the entire circumference of the passage constituting member and the wall of the tank body can be integrated easily and reliably.

Preferably, an accessory part including a resin main body formed with a flange part over the entire circumference is prepared, and the accessory part is incorporated into an injection mold, and insert injection molding is performed. While forming a part of the wall and integrating the wall of the tank body and the peripheral edge of the flange of the accessory part, the passage structure is configured by the injection resin in a state where the passage component member is disposed so as to cover the accessory part. The member and the wall of the tank body are integrated, the passage is formed by the passage constituting member and the wall of the tank body, and the accessory is communicated with the passage.
Since the wall of the tank body is provided for the passage formation, the configuration is simplified. Further, the accessory part is easily and reliably integrated with the wall of the tank body through the collar part.

  According to the present invention, the structure around the fuel tank can be simplified, and the cost for configuring the passage can be reduced.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the resin fuel tank 5 includes a tank body 10, a passage component member 20, and two (plural) fuel cut valves 30 (accessory parts).

  The tank body 10 includes an upper half 11 and a lower half 12 having a single-layer structure in which POM (polyacetal) is injection-molded. These half bodies 11 and 12 are integrated by injection resin in the periphery.

  The passage component member 20 is also made of an injection-molded product having a single layer structure of POM. As shown in FIG. 4, as shown in FIG. 4, an elongated hollow main body portion 21 extending linearly and a uniform thickness projecting over the entire circumference of the main body portion 21. A flat plate-like flange portion 22 and a joint portion 23 formed at the center of the main body portion 21 are provided.

  An edge of the flange portion 22 of the passage constituting member 20 extends linearly in the extending direction of the main body portion 21, and both ends of the main body portion 21 are semicircular. The edge of the flange portion 22 is injection welded integrally with the upper wall 11a of the upper half 11 over the entire circumference. In addition, in the state before the injection welding process to be described later, the edge of the collar portion 22 has a bifurcated tapered thin portion 22a over the entire circumference, but at the time of injection welding, the thin portion 22a is melted and injected resin. And integrated. Although the thin portion 22a does not exist in the state after injection welding shown in FIG. 4, the thin portion 22a is shown for easy understanding.

  The main body 21 of the passage component member 20 has a passage 25 extending in the longitudinal direction of the main body 21. The joint 23 has a communication hole 26, and the communication hole 26 is connected to the center of the passage 25. Further, screw holes 27 are formed at both ends of the bottom wall of the main body portion 21, and the screw holes 27 are continuous with both ends of the passage 25 or in the vicinity thereof.

  The fuel cut valve 30 is attached to both ends of the passage component member 20. The fuel cut valve 30 has a main body 31 made of an injection molded product having a single layer structure of POM. The main body 31 has an accommodating space 32, and a male screw portion 33 projects from the center of the upper wall. A valve port 34 is formed in the male screw portion 33. The fuel cut valve 30 is attached to the passage component member 20 by screwing the male screw portion 33 into the screw hole 27 of the passage component member 20.

  The main body 31 of the valve 30 has a circular flange 35 that is flush with the upper wall thereof. The flange 35 has a flat plate shape with a uniform thickness, and has the same diameter as the semicircle at the end of the flange 22 of the passage constituting member 20.

  In the attached state of the valve 30, the flange portion 35 of the valve 30 is overlapped with the end portion of the flange portion 22 of the passage constituting member 20 in a surface contact state, and the half circumference portion of the peripheral edge of the flange portion 35 is the flange portion 22. Is coincident with the peripheral edge.

  The peripheral edge of the flange portion 35 of the valve 30 is injection-welded integrally with the upper wall 11a of the upper half 11 over the entire periphery, like the flange portion 22 of the passage component member 20. In the state before the injection welding process to be described later, the peripheral edge of the collar portion 35 has a bifurcated tapered thin-walled portion 35a over the entire circumference, but this thin-walled portion 35a is melted at the time of injection welding and integrated with the injection resin. It becomes. Although the thin part 35a does not exist in the state after the injection welding shown in FIG. 4, the thin part 35a is shown for easy understanding.

  A communication hole (not shown) is formed in the bottom wall of the main body 31 of the valve 30. A valve structure (not shown) including a float valve and a coil spring is accommodated in the accommodating space 32 of the main body 31. When mounted on the tank main body 10 to be described later, the float valve compresses the coil spring by its own weight and is in the lower position, thereby opening the valve port 34 and releasing the gas pressure in the tank main body 10. When the fuel in the tank body 10 enters the accommodation space 32 through the communication hole, the float valve closes the valve port 34 by buoyancy and inhibits the fuel from flowing out.

  In the above configuration, the joint portion 23 of the passage component member 20 is connected to the canister via a tube (not shown). The fuel gas in the tank body 10 is sent to the canister through the valve 20, the passage 25 of the passage constituent member 20, the communication hole 26, and further through the tube, and is collected here. When the tank body 10 is tilted as the vehicle body is tilted, the fuel cut valve 2 located below is closed to prevent fuel outflow, but the fuel cut valve 2 located above is opened to allow the gas pressure to escape. It is like that.

  In the above configuration, the structure around the fuel tank 5 is simplified as apparent from the conventional structure shown in FIG. In addition, since the number of tubes made of fluororesin is reduced, the cost can be reduced.

  Since the fuel tank 5 includes the passage constituting member 20 and the main body 31hsPOM of the valve 30, fuel permeation can be prevented. POM has a lower material cost than other resins having a fuel permeation preventing function such as polyamide. Moreover, since these members have a single layer structure, the molding cost is low.

  Next, a manufacturing method of the fuel tank 5 having the above configuration will be described in detail. First, as shown in FIG. 2, the male thread portion 33 of the valve 30 is screwed into the screw holes 27 at both ends of the passage component member 20, thereby obtaining the assembly 40 including the passage component member 20 and the two valves 30.

  Next, the assembly 40 is incorporated to perform insert injection molding of the upper half 11 of the tank body 10 and simultaneously perform injection molding of the lower half 12. The injection mold 50 will be described with reference to FIG. The injection mold 50 includes an upper mold 51 (first mold) and a lower mold 52 (second mold). In FIG. 3, only the part for forming the upper half 11 is shown, and the part for forming the lower half 12 is omitted.

  The upper mold 51 and the lower mold 52 have molding surfaces 51a and 52a that face each other. The molding surface 51a of the upper mold 51 is formed with an elongated housing recess 51b, and the molding surface 52a of the lower mold 52 is formed with two housing recesses 52b. The edges of both ends of the housing recess 51b are semicircular, and the housing recess 52b is circular. The diameters of the semicircle and the circle are smaller than the diameter of the end portion of the flange portion 22 and the flange portion 35. In addition, on the molding surface 52a of the lower mold 52, a shallow and elongated convex portion 52c is formed between the two accommodating concave portions 52b. The lateral width of the convex portion 52 c is narrower than the lateral width of the passage component member 20.

  The assembly 40 is set in an injection mold 50 and insert molding of the upper half 11 is performed. More specifically, the passage constituting member 20 of the assembly 40 is housed in the housing recess 51 b of the upper mold 51 and the fuel cut valve 30 is housed in the housing recess 52 b of the lower mold 52 in the mold clamping state. Further, the flange portion 22 of the passage constituting member 20 is pressed over the entire periphery by the peripheral edge portion of the accommodation recess 52b of the upper mold 51, and the flange portion 35 of the fuel cut valve 30 is pressed by the peripheral edge portion of the storage recess 52b of the lower die 52. , Pressed all around. The shallow convex portion 52 c of the lower mold 52 is in contact with the lower surface of the main body portion 21 of the passage constituting member 20.

  In the set state, a thin molding space 55 is formed by the molding surfaces 51a, 52a, the periphery of the flange portion 22 of the passage component member 20, and the periphery of the flange portion 35 of the fuel cut valve 30.

  Next, as shown in FIG. 4, the upper half 11 of the tank body 10 is molded by injecting the same kind of resin, that is, POM, into the molding space 55 into the passage constituting member 20 and the main body 31 of the fuel cut valve 30. . In this injection molding, the injected molten resin contacts and melts the peripheral thin portions 22a, 35a of the flange portion 22 of the passage component member 20 and the flange portion 35 of the fuel cut valve 30, so that the passage component member 20 and the fuel are melted. The main body 31 of the cut valve 30 is integrated with the upper wall 11a of the upper half 11 of the tank main body 10 (injection welding).

  Since the peripheral portions of the flange portions 22 and 35 form tapered thin portions 22a and 35a, the heat capacity is small and the melted portion is reliably melted and firmly integrated with the upper half 11 over the entire circumference. The flange 22 of the passage component member 20 is flush with the outer surface of the upper wall 11a of the upper half 11 and the flange 35 of the valve 30 is flush with the inner surface of the upper wall 11a.

  As described above, the upper half 11 of the tank body 10 is injection-molded. At the same time, the lower half 12 is also injection-molded by POM in different molding parts of the mold 50. Then, the fuel tank 5 is completed by injecting and welding the upper half body 11 and the lower half body 12 with a secondary injection resin (POM) by a DSI (die slide injection) method.

  Next, another embodiment of the present invention will be described. The components corresponding to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The material used is the same as in the first embodiment.

  In the second embodiment shown in FIG. 5, the passage constituting member 20 is constituted by an elongated upper member 20 </ b> A (outer half member) and a lower member 20 </ b> B (inner half member). A joint portion similar to that of the first embodiment is integrally formed on the upper surface of the upper member 20A. The lower member 20B is obtained by inserting two fuel cut valves 30 into an injection mold and performing insert injection molding. The peripheral edge of the flange portion 35 of the valve 30 is integrated with the lower member 20B. The configuration of the valve 30 is the same as that of the first embodiment except that there is no male screw.

  Each of the upper member 20A and the lower member 20B has flanges 22 ′ and 22 ″ around the entire circumference. The peripheral edges of these flanges 22 ′ and 22 ″ have thin wall parts 22a ′ and 22a ″ around the circumference. The upper half 11 of the tank body 10 is obtained by insert injection molding by incorporating the flanges 22a ′ and 22a ″ in a surface contact state into an injection mold.

  In the above embodiment, the passage 25 is formed by the upper member 20A and the lower member 20B, and the entire peripheral edges of the flanges 22 ′ and 22 ″ of these members 20A and 20B are integrated with the upper wall 11a of the upper half 11. .

  In 3rd Embodiment shown in FIG. 6, FIG. 7, the channel | path component member 20 is comprised by 20 C (outside half body) and the lower side member 20D (inner half body). A joint portion similar to that of the first embodiment is integrally formed on the upper surface of the upper member 20C. These members 20C and 20D are formed in a thin and shallow box shape, and locking claws 28 'and 28 "are formed on the peripheral wall thereof. By pressing both members together, the locking claws 28' and 28" are locked. It is connected. Both end portions of the peripheral walls of these members 20C and 20D are semicircular. A passage 25 is formed between the members 20C and 20D.

  Tapered support holes 29 are formed at both ends of the lower member 20D. On the other hand, the peripheral edge of the flange portion 35 of the fuel cut valve 30 also has an inclined surface 35 b that matches the taper of the support hole 29. With the periphery of the flange portion 35 of the valve 30 placed on the periphery of the support hole 29 of the lower member 20D, the upper member 20C and the lower member 20D are engaged with the locking claws 28 'and 28 "as described above. By assembling by the stopping action, the peripheral edge of the flange portion 35 of the valve 30 is sandwiched between the semicircular peripheral wall at the end of the upper member 20C and the peripheral edge of the support hole 29 of the lower member 20D. Incorporated with 20D.

  Next, an assembly made up of the upper member 20C, the lower member 20D, and the two valves 30 is assembled into an injection mold, and insert injection molding is performed to obtain the upper half 11 of the tank body 10. At this time, the injection resin is supplied not only to the outer peripheral surfaces of the upper member 20C and the lower member 20D, but also to the lower peripheral surface of the lower member 20D and the lower surface of the flange portion 35 of the valve 30. The upper wall 11a of the half body 11 is integrated.

  In the third embodiment, as a result of the insert injection molding, a recess 11x is formed in the upper wall 11a of the upper half 11 and the passage component member 20 is accommodated in the recess 11x. The outer surface (the upper surface of the upper member 20C) is flush with the outer surface of the upper wall 11a, and the fuel tank 5 has a further simplified external structure.

  The appearance structure similar to that of the third embodiment can also be obtained in the first and second embodiments. For example, in FIG. 4, the passage component member 20 is composed of a flat plate portion that is flush with the outer surface of the upper wall 11a, and a raised portion that is raised on the lower surface of the flat plate portion, and a joint portion is provided on the flat plate portion. What is necessary is just to make it the structure which attaches the valve | bulb 30 to the lower wall part. Further, in FIG. 5, the upper member 20A may be configured in a flat plate shape.

  In the fourth embodiment shown in FIG. 8, the upper half 11 of the tank body 10 is obtained by first inserting two fuel cut valves 30 into an injection mold and performing insert injection molding. Thereby, the upper wall 11a of the upper half 11 and the peripheral edge of the flange 35 of the bulb 30 are integrated.

  By the above molding, the upper half 11 has an annular convex portion 11b protruding from the upper wall 11a. On the other hand, the passage constituting member 20E is also obtained separately by injection molding. The passage component member 20E has a shallow and elongated box shape, and a peripheral wall thereof is abutted against the annular convex portion 11b. In this butted state, an annular filling recess 60 is formed between the peripheral wall of the passage component member 20E and the annular protrusion 11b. Then, by filling the filling recess 60 with the injection resin 61, the peripheral wall and the annular protrusion 11b are integrated (injection welding). In addition, the injection molding of the upper half body 11, the injection molding of the passage component member 20E, and the filling of the injection resin can be performed by the DSI method.

  In the above embodiment, the passage component member 20E covers the two valves, and the passage 25 is formed between the passage component member 20E and the upper wall 11a of the upper half 11.

The present invention is not limited to the above embodiment, and various forms can be adopted. The passage may be used for other purposes.
The valve path component, the tank mounting structure, and the path mounting member mounting structure shown in the above embodiment can be arbitrarily combined. For example, in the first to third embodiments, the passage component member and the tank body wall may be integrated by injection resin filling instead of insert molding. In 2nd Embodiment shown in FIG. 5, you may attach a valve | bulb to the wall of a tank main body not by insert molding but screwing.

  In the embodiment shown in FIG. 8, the passage component member may be hollow and have a passage therein. In this case, a valve is attached to the lower wall of the passage component.

  The passage constituting member and the tank wall may be integrated by injection molding at the same time. Moreover, you may integrate both by hot plate welding.

It is a schematic side view showing the whole fuel tank which constitutes a 1st embodiment of the method of the present invention. It is a longitudinal cross-sectional view which shows the state which assembled the assembly which consists of a channel | path structural member and a fuel cut valve in the manufacturing process of the fuel tank. It is a longitudinal cross-sectional view which shows the state which set the assembly to the injection mold. It is a longitudinal cross-sectional view which shows the upper half body of the fuel tank in which the assembly was assembled and insert-molded. It is a principal part longitudinal cross-sectional view which shows 2nd Embodiment of this invention method. It is a principal part longitudinal cross-sectional view which shows 3rd Embodiment of this invention method. It is a schematic side view which shows the whole fuel tank of the said 3rd Embodiment. It is a principal part longitudinal cross-sectional view which shows 4th Embodiment of this invention method. It is a schematic side view which shows the structure around the conventional fuel tank.

Explanation of symbols

5 Fuel Tank 10 Tank Body 11 Upper Half 11a Upper Wall (Tank Body Wall)
20 Path member 20A, 20C Upper member (outer half)
20B, 20D Lower member (inner half)
20E passage component member 22, 22 ', 22 "flange 23 joint 25 passage 30 fuel cut valve (accessory)
31 Main body 34 Valve port 35 Gutter 40 Assembly 50 Injection mold 60 Resin filling recess 61 Injection resin

Claims (17)

  A resin tank main body and a resin-made passage constituent member integrated with the tank main body wall, and a passage is formed in the passage constituent member or between the passage constituent member and the tank main body wall. A fuel tank made of resin.   2. The resin fuel tank according to claim 1, wherein an accessory is attached to the passage constituting member or the wall of the tank main body, and the accessory is connected to the passage.   The accessory part comprises a fuel cut valve that releases gas pressure in the tank body and prevents the outflow of fuel, the valve port of which is continuous with the passage, and the passage component member has a joint portion integrally. The resin fuel tank according to claim 2.   The said channel | path structural member has a collar part over the perimeter, The peripheral edge of this collar part and the wall of the said tank main body are integrated so that an outer surface may be flush | planar, and any one of Claims 1-3 characterized by the above-mentioned. The resin fuel tank described in 1.   4. The resin fuel tank according to claim 1, wherein an outer surface of the wall of the tank body and an outer surface of the passage constituting member are flush with each other.   6. The resin fuel tank according to claim 1, wherein the tank main body and the passage constituting member have a single layer structure of polyacetal.   At least a part of the wall of the tank body is molded by incorporating a resin-made passage component member into an injection mold and insert molding is performed, and the above-described passage component member is integrated with the wall over the entire circumference. A method of manufacturing a resin fuel tank, wherein a passage is formed by a passage constituent member, or a passage is formed between the passage constituent member and a wall of a tank body.   A wall portion of the tank body and a peripheral edge of the flange portion of the passage component member are integrated by integrally forming a flange portion on the entire circumference of the passage component member and performing the insert injection molding. The method for manufacturing a resin fuel tank according to claim 7. Prepare an accessory with a resin body that forms a collar over the entire circumference, attach this accessory to the above-mentioned passage component, and overlap the flange of the passage component with the collar of the accessory ,
By assembling the assembly comprising the passage component and the accessory part into the injection mold and performing insert injection molding, the peripheral edge of the flange part of the passage component member and the accessory part is formed with respect to the wall of the tank body. The method for producing a resin fuel tank according to claim 8, wherein the resin fuel tanks are integrated.   The passage component member is composed of an outer half body and an inner half body, and both the half halves are overlapped to form the passage, and in this overlapped state, it is incorporated into the injection mold and subjected to insert injection molding. The method of manufacturing a resin fuel tank according to claim 7, wherein the wall of the tank body and the entire circumference of both halves are integrated.   The outer half body and the inner half body have flanges over the entire circumference, and the insert injection molding is performed in a state in which the flange parts between the two half bodies are overlapped, so that the wall of the tank body and both The method for manufacturing a resin fuel tank according to claim 10, wherein the periphery of the flange portion of the split body is integrated.   The method for producing a resin fuel tank according to claim 10 or 11, wherein an accessory part is attached to the inner half before the tank body wall is formed by the insert injection molding.   The accessory part has a resin main body formed with a collar over the entire circumference, and by molding the inner half by incorporating the accessory part into an injection mold and performing insert molding, The method for producing a resin fuel tank according to claim 12, wherein the inner half and the flange periphery of the accessory are integrated.   The outer half body and the inner half body have locking claws over the entire circumference, and both the half claws are connected by locking both locking claws, and the insert injection molding is performed in this connected state. The method for producing a resin fuel tank according to claim 10.   Prepare an accessory with a resin body that forms a collar over the entire circumference, and support the collar of the accessory with both halves in the connected state of the outer and inner halves. 15. The method for producing a resin fuel tank according to claim 14, wherein the insert molding is carried out by incorporating an assembly composed of both halves and accessory parts into an injection mold.   The resin-made passage component member is abutted against the wall of the resin tank body, and an annular resin-filled recess is formed between the entire circumference of the passage component member and the wall of the tank body, and the injection resin is formed in this recess. The tank body wall and the passage member are integrated, and a passage is formed in the passage member, or a passage is formed between the passage member and the tank body wall. A method for manufacturing a resin fuel tank, which is characterized.   At least a part of the tank body is prepared by preparing an accessory part having a resin main body formed with a collar over the entire circumference, incorporating the accessory part into an injection mold, and performing insert injection molding. In the state where the wall of the tank body and the peripheral edge of the flange of the accessory part are integrated, and the passage component member is arranged so as to cover the accessory part, the passage component member and the tank are formed by the injection resin. 17. The method for producing a resin fuel tank according to claim 16, wherein the wall of the main body is integrated, the passage is formed by the passage constituting member and the wall of the tank main body, and the accessory is communicated with the passage. .

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