WO2019188211A1

WO2019188211A1 - Resin-made tank including barrier layer and method for manufacturing resin-made tank including barrier layer

Info

Publication number: WO2019188211A1
Application number: PCT/JP2019/009756
Authority: WO
Inventors: 大輔田淵; 幸倉田; 光横村; 啓吾三根; 祐山口; 智行松村; 水庫　由喜; 明吉澤
Original assignee: 本田技研工業株式会社; 株式会社タカギセイコー
Priority date: 2018-03-30
Filing date: 2019-03-11
Publication date: 2019-10-03
Also published as: JP6964180B2; JPWO2019188211A1

Abstract

The purpose of the present invention is to provide: a resin-made tank including a barrier layer which has improved bonding strength between the barrier layer and a resin body and in which resin is prevented from permeating toward the direction of separating the barrier layer; and a method for manufacturing the resin-made tank including the barrier layer. In the resin-made tank including a barrier layer 36a, 36b on the inner surface of a thermoplastic resin layer 45, 46, an opening 80, 117 is provided in the barrier layer 36a, 36b, a resin injection gate part 61, 91 is disposed facing the position of the opening 80, 117, and the edge of the opening 80, 117 of the barrier layer 36a, 36b includes a bent part 81, 111 which is bent away from a flow direction of a resin from the resin injection gate part 61, 91.

Description

Resin tank having barrier layer and method for producing resin tank having barrier layer

The present invention relates to a resin tank having a barrier layer and a method for producing a resin tank having a barrier layer.

Conventionally, it is known that a container having a barrier layer in a wall surface is formed by injection molding (see, for example, Patent Document 1). In Patent Document 1, the shape of the wall having the gate hole for injecting the resin is a thick-walled portion raised on the opposite side of the gate, and the barrier layer in the thick-walled portion is curved away from the gate hole, The barrier layer is integrated into the resin layer by smoothing the flow of the high-pressure and high-temperature resin flowing in from the gate hole. In Patent Document 1, a multilayer injection molded product in which a barrier layer is sandwiched between an outer container layer and an inner container layer is formed.
Further, when molding a large-sized closed container such as a fuel tank for automobiles, it is known to insert a barrier layer on the inner surface and perform injection molding with a thermoplastic synthetic resin (see, for example, Patent Document 2). In Patent Document 2, a plurality of open-shaped divided bodies are formed by injection molding, and then the peripheral edges of the openings of the divided bodies are joined and pressed together to form a large closed container. Yes.

JP-A-5-77280 Japanese Patent Laid-Open No. 10-157738

However, in the multilayer injection-molded article described in Patent Document 1, it is necessary to control the resin injection pressure and speed from the gate so that the barrier layer is located between the inner layer and the outer layer of the container. Is complicated. Therefore, it is unsuitable for molding a large container such as a fuel tank, and simplification of the resin injection structure is a problem.
In addition, when the barrier layer is molded in advance as in Patent Document 2 and inserted into a mold for injection molding, the gate portion is not melted or squeezed by the flow of high-temperature and high-pressure resin into the inserted barrier layer. It was also a challenge to place them so that they would not occur.
The present invention has been made in view of the above-described circumstances, and can prevent the resin from turning around in the direction in which the barrier layer is peeled off, and a resin tank and barrier having a barrier layer in which the bonding strength between the barrier layer and the main body resin is improved. It aims at providing the manufacturing method of the resin-made tanks which have a layer.

This specification includes all the contents of Japanese Patent Application No. 2018-0669519 filed on Mar. 30, 2018.
The present invention provides a resin tank having a barrier layer (36a, 36b) on the inner surface of a thermoplastic resin layer (45, 46), provided with openings (80, 117) in the barrier layer (36a, 36b). Resin injection gates (61, 91) are arranged facing the positions of the openings (80, 117), and the edges of the openings (80, 117) of the barrier layers (36a, 36b) are the resin injections. It has a bent shape part (81, 111) bent in the direction away from the flow direction of the resin from the gate part (61, 91).

In the resin tank having the barrier layers (36a, 36b) on the inner surfaces of the thermoplastic resin layers (45, 46), the present invention provides openings (80, 117) in the surface of the barrier layers (36a, 36b). And a removal portion (86a, 116) from which the resin of the resin injection gate portion (61, 91) is removed is provided at a position facing the opening (80, 117). A bent portion (81, 111) is provided at the end edge so as to be bent from the removal portion (86a, 116) to the inner surface side of the thermoplastic resin layer (45, 46).

In the above invention, a resin reservoir (84) is provided at a position opposite to the resin injection gate portion (61), and the resin reservoir (84) enters the opening (80) of the barrier layer (36a). The wall surface facing the resin injection gate portion (61) may protrude in a V shape.

In the above invention, the resin tank has a cut portion (120) cut and removed as an opening (44) for mounting related parts, and the opening of the barrier layer (36b) is formed in the cut portion (120). The part (117) may be exposed.

Moreover, in the said invention, the edge part (82) of the said bending-shaped part (81) of the said barrier layer (36a) is inserted in the cyclic | annular convex part (85) formed in the thermoplastic resin layer (45). Also good.

The present invention relates to a method for manufacturing a resin tank having a barrier layer (36a, 36b) on an inner surface of a thermoplastic resin layer (45, 46), and the inside of the opening (80, 110) of the barrier layer (36a, 36b). The resin injection gate portion (61, 91) is disposed on the edge, and the edge of the opening (80, 110) is bent in a direction away from the resin flow direction from the resin injection gate portion (61, 91). It has a shape part (81, 111), and the resin from the resin injection gate part (61, 91) is caused to flow into the bent shape part (81, 111).

In the above invention, the resin reservoir (84) that protrudes into the opening (80) of the barrier layer (36a) by protruding the wall surface (71) facing the resin injection gate portion (61) into a V shape. The barrier layer according to claim 5 may be formed.

In the above invention, the barrier layer (36b) and the thermoplastic resin layer (46) are cut out with an opening shape larger than the opening (110) of the barrier layer (36b), and the related parts are attached. An opening (44) may be formed.

In the above invention, the bent portion (81, 111) of the barrier layer (36a, 36b) is formed in the annular recess (72, 103) provided on the downstream side of the resin injection gate portion (61, 91). The end portions (82, 112) may be disposed, and the resin from the resin injection gate portions (61, 91) may flow into the bent shape portions (81, 111).

The resin tank having a barrier layer according to the present invention has a barrier layer on the inner surface of the thermoplastic resin layer, an opening is provided in the barrier layer, and a resin injection gate portion is arranged facing the position of the opening. And an edge of the opening of the barrier layer has a bent portion bent in a direction away from the flow direction of the resin from the resin injection gate portion. According to this configuration, the resin injection gate portion is disposed in the opening portion of the barrier layer, and the edge of the opening portion of the barrier layer is bent in a direction away from the resin flow direction from the resin injection gate portion. As a result, the resin can be prevented from turning around in the direction of peeling off the barrier layer, and the bonding strength between the barrier layer and the injected resin can be improved.

A resin tank having a barrier layer according to the present invention has a barrier layer on an inner surface of a thermoplastic resin layer, an opening is provided in the surface of the barrier layer, and a resin injection gate is provided at a position facing the opening. The removal part from which the resin of the part was removed is provided, and the bent shape part bent from the said removal part to the inner surface side of the said thermoplastic resin layer is provided in the edge of the said opening part. According to this configuration, the resin injection gate portion is disposed in the opening portion of the barrier layer, and the edge of the barrier layer opening portion is bent in a direction away from the resin flow direction from the resin injection gate portion. As a result, the resin can be prevented from turning around in the direction of peeling off the barrier layer, and the bonding strength between the barrier layer and the injected resin can be improved.

In the above invention, there is a resin pool at a position opposite to the resin injection gate portion, and the resin pool protrudes into the opening of the barrier layer and protrudes in a V shape from the wall surface facing the resin injection gate portion. It may have a shape. According to this configuration, the resin puddle positioned at the position opposite to the resin injection gate portion is sized to enter the opening of the barrier layer, and the wall surface facing the resin injection gate portion is protruded in a V shape so that the resin injection is performed. Rectification in the flow direction can be promoted while extracting air contained in the resin from the gate portion, and the wall thickness can be increased instead of having no barrier layer.

In the above invention, the resin tank may have a cut portion cut and removed as an opening for mounting related parts, and the opening portion of the barrier layer may face the cut portion. According to this configuration, the edge of the opening portion of the barrier layer is formed by having the cut portion cut and removed as the opening for mounting the related component, and facing the opening portion of the barrier layer in the cut portion. Therefore, the quality of the excision part is improved because the excision is performed at a site that is separated from the downstream side in the flow direction and does not generate wrinkles.

In the above invention, the end of the bent portion of the barrier layer may be inserted into an annular convex portion formed in the thermoplastic resin layer. According to this configuration, since the end of the bent portion of the barrier layer is inserted into the annular protrusion formed in the thermoplastic resin layer, the influence of the resin flow pressure can be suppressed by the annular protrusion, and the barrier The quality of the bonding strength of the layers can be further improved.

The method for producing a resin tank having a barrier layer according to the present invention is the method for producing a resin tank having a barrier layer on the inner surface of a thermoplastic resin layer, wherein a resin injection gate portion is disposed in the opening of the barrier layer. The edge of the opening has a bent shape portion bent in a direction away from the flow direction of the resin from the resin injection gate portion, and the resin from the resin injection gate portion is caused to flow in the bent shape portion. According to this configuration, the resin flows from the resin injection gate portion to the bent shape portion bent in the direction away from the resin flow direction from the resin injection gate portion, so that the resin wraps in the direction of peeling the barrier layer. And the bonding strength between the barrier layer and the injected resin can be improved.

In the above-described invention, a wall of the resin facing the resin injection gate portion may be protruded in a V shape to form a resin pool that enters the opening of the barrier layer. According to this configuration, the resin puddle positioned at the position opposite to the resin injection gate portion is sized to enter the opening of the barrier layer, and the wall surface facing the resin injection gate portion is protruded in a V shape so that the resin injection is performed. Rectification in the flow direction can be promoted while extracting air contained in the resin from the gate, and the wall thickness can be increased instead of having no barrier layer.

In the above invention, the opening for mounting related parts may be formed by cutting the barrier layer and the thermoplastic resin layer in an opening shape larger than the opening of the barrier layer. According to this configuration, since the opening portion of the barrier layer faces the cut portion, the cut portion is cut away from the edge of the opening portion of the barrier layer at the downstream side in the flow direction so as not to be twisted. The quality of the part is improved.

In the above invention, an end of the bent portion of the barrier layer is disposed in an annular recess provided downstream of the resin injection gate portion, and the resin from the resin injection gate portion is placed in the bent shape portion. May be allowed to flow. According to this configuration, since the end of the bent portion of the barrier layer is inserted into the annular recess, the influence of the flow pressure of the resin can be suppressed by the annular recess, and the quality can be further improved.

FIG. 1 is a perspective view of a front portion of a motorcycle according to an embodiment of the present invention as viewed from the left rear side. FIG. 2 is a cross-sectional view of the fuel tank taken along the center of the vehicle width. FIG. 3 is a cross-sectional view showing the configuration of the fuel tank in the plate thickness direction. FIG. 4 is a schematic diagram showing a manufacturing process of the fuel tank body. FIG. 5 is an explanatory view of the main part of the injection molding of the upper half of the fuel tank body. FIG. 6 is an explanatory view of a main part of injection molding of the lower half of the fuel tank body. FIG. 7 is an explanatory view of the lower half of the fuel tank body as viewed from the inner surface side. FIG. 8 is an explanatory diagram of a fuel pump mounting structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description, descriptions of directions such as front and rear, right and left and up and down are the same as directions with respect to the vehicle body unless otherwise specified. Further, in each figure, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

FIG. 1 is a perspective view of a front portion of a motorcycle according to an embodiment of the present invention as viewed from the left rear side.
In the motorcycle 1, an engine 10 as a power unit is supported on a body frame F, a steering system 11 that supports a front wheel 2 so as to be steerable is supported on a front end of the body frame F, and supports a rear wheel (not shown). A swing arm (not shown) is provided on the rear side of the body frame F. The motorcycle 1 is a saddle-ride type vehicle in which a seat 13 on which a driver sits is provided above a rear portion of a vehicle body frame F.

The vehicle body frame F extends downward from a head pipe portion 14 that rotatably supports the steering system 11, a pair of left and right

main frames

15 and 15, a down frame 16, and rear ends of the

main frames

15 and 15. A pair of left and right pivot frames (not shown) connected to the rear end of the down frame 16 and a pair of left and right seat frames 17 and 17 extending rearward from the rear ends of the main frames 15 and 15 (the left seat frame is not shown) ) And a pair of left and right subframes (not shown) that extend rearward and upward from the pivot frame and are connected to the rear portions of the seat frames 17 and 17.

The engine 10 is located below the

main frames

15 and 15 and is disposed between the down frame 16 and the pivot frame (not shown) in the vehicle longitudinal direction.
The seat 13 is disposed above the seat frames 17 and 17 and is supported by the seat frames 17 and 17.
The fuel tank (resin tank) 30 is disposed above the

main frames

15 and 15 along the

main frames

15 and 15 and is supported by the

main frames

15 and 15. The fuel tank 30 is disposed between the head pipe portion 14 and the seat 13 in the vehicle longitudinal direction. The front end portion of the seat 13 covers the upper surface of the rear portion of the fuel tank 30 from above.

A fuel filler 31 (see FIG. 2) is provided on the upper surface of the front portion of the fuel tank 30. A tank cap 32 is attached to the fuel filler 31, and the fuel filler 31 is closed by the tank cap 32.
A tray 33 is attached to the fuel tank 30 to surround the fuel filler port 31 from the periphery. The tray 33 is disposed between the lower end of the tank cap 32 and the upper surface of the fuel tank 30.
The tray 33 is provided with a drain pipe 33a extending downward. The spilled fuel at the time of refueling or the like is received by the tray 33 and discharged downward from the drain pipe 33a.

A front mounting stay (mounting stay) 37 that protrudes forward is provided at an upper portion of the front portion of the fuel tank body 35.
The front portion of the fuel tank main body 35 is fixed to the upper surface of the rear portion of the head pipe portion 14 by a tank fixture 39a inserted through the front mounting stay 37 from above.
A pair of left and right rear mounting stays (mounting stays) 38L and 38R projecting downward are provided at the lower part of the rear portion of the fuel tank body 35. The rear mounting stays 38L and 38R are fixed to the tank stays 15a and 15a of the

main frames

15 and 15 by

tank fixing tools

39b and 39b inserted from outside in the vehicle width direction, respectively.

FIG. 2 is a cross-sectional view of the fuel tank 30 cut at the center of the vehicle width.
The fuel tank 30 includes a resin fuel tank main body (tank main body) 35 and a barrier sheet layer (barrier layer, barrier sheet) 36 provided on substantially the entire inner surface of the fuel tank main body 35.
The barrier sheet layer 36 is made of a material having lower fuel permeability than the material constituting the fuel tank body 35. The barrier sheet layer 36 prevents fuel such as gasoline stored in the fuel tank 30 from passing through the fuel tank 30 and leaking outside.

The fuel tank main body 35 includes a cylindrical injection portion 40 for fuel injection (for liquid injection) in the upper portion of the front portion. The cylindrical injection part 40 is a cylinder extending in the vertical direction, and the upper end part of the cylindrical injection part 40 forms a fuel filler 31.
The cylindrical injection part 40 is made of the same resin material as that of the fuel tank body 35 and is formed integrally with the fuel tank body 35.
As shown in FIG. 1, a metal base 41 is attached to the cylindrical injection portion 40. The base 41 is fixed to the upper surface of the fuel tank body 35 by a plurality of base fixing tools (fixing tools) 42 inserted from above.
Further, the fuel tank main body 35 includes a pump attachment port (an auxiliary device insertion opening, an opening for attaching related components) 44 to which a fuel pump (auxiliary device, related components) 43 is attached on the lower surface.

The fuel tank body 35 includes an upper half 45 (thermoplastic resin layer, one divided body) constituting the upper part of the fuel tank body 35 and a lower half 46 (heat) constituting the lower part of the fuel tank body 35. It is divided into a plastic resin layer and the other divided body). The fuel tank body 35 is formed in a tank shape by joining the upper half 45 and the lower half 46.

The upper half 45 is formed in a case shape whose lower surface opens downward. The periphery of the opening on the lower surface of the upper half 45 is an upper joint (flange) 47 that is joined to the lower half 46. As shown in FIG. 1, the upper joint portion 47 includes a flat surface portion 47a that extends substantially horizontally at the rear portion, and a slope portion 47b that is inclined with respect to the flat surface portion 47a and extends forward and forward.

As shown in FIG. 2, the lower half 46 is formed in a case shape whose upper surface opens upward. The peripheral edge of the opening on the upper surface of the lower half 46 is a lower joint (flange) 48 joined to the upper half 45. As shown in FIG. 1, the lower joint portion 48 includes a flat surface portion 48a parallel to the flat surface portion 47a and a slope portion 48b parallel to the slope portion 47b. The plane part 47a is joined to the plane part 48a, and the slope part 47b is joined to the slope part 48b.

As shown in FIG. 2, the barrier sheet layer 36 includes an upper barrier sheet layer 36 a (one barrier sheet layer) bonded to the inner surface of the upper half 45 and a lower barrier bonded to the inner surface of the lower half 46. A sheet layer 36b (the other barrier sheet layer).

FIG. 3 is a cross-sectional view showing the configuration of the fuel tank 30 in the plate thickness direction.
The fuel tank 30 is composed of six layers including a fuel tank body 35 that is a single resin layer and a barrier sheet layer 36 that is composed of five layers.
The barrier sheet layer 36 includes a barrier main body layer 55,

adhesive layers

56 and 56 provided on both sides of the barrier main body layer 55, and

outer layers

57a and 57b bonded to both sides of the barrier main body layer 55 through the

adhesive layers

56 and 56. With.

The material of the fuel tank body 35 is, for example, high density polyethylene (HDPE).
The barrier body layer 55 is made of a material that is less permeable to fuel than high-density polyethylene. For example, the barrier main body layer 55 is made of an ethylene vinyl alcohol copolymer (EVOH).
The

outer layers

57a and 57b are made of the same material as that of the fuel tank body 35, and as an example, are made of high-density polyethylene.

The barrier sheet layer 36 is coupled to the inner surface of the fuel tank body 35 via the outer layer 57a on the fuel tank body 35 side. The barrier sheet layer 36 is coupled to the inner surface of the fuel tank main body 35 via the outer layer 57 a made of the same material as the fuel tank main body 35, and thus has high adhesion to the fuel tank main body 35 and is firmly attached to the fuel tank main body 35. Combined.
In the barrier sheet layer 36, the outer layer 57b is exposed in the fuel tank body 35 and comes into contact with the fuel. For this reason, direct contact of the fuel with the barrier main body layer 55 is prevented.

FIG. 4 is a schematic view showing a manufacturing process of the fuel tank main body 35.
With reference to FIG. 4, a plurality of materials constituting the barrier sheet layer 36 are supplied to the extrusion forming die 51, and the sheet-like formed body 50 is extruded from the die 51.
The formed body 50 is shaped by the vacuum forming machine 52 into a shape along the inner surface of the fuel tank main body 35. The shaped barrier sheet layer 36 is trimmed at the periphery by a trimming die (not shown).
The trimmed barrier sheet layer 36 is set in an injection molding die 53 for molding the fuel tank main body 35, and is integrated with the fuel tank main body 35 when the fuel tank main body 35 is injection molded. That is, the barrier sheet layer 36 is coupled to the inner surface of the fuel tank body 35 by insert molding.

Here, the upper barrier sheet layer 36a and the lower barrier sheet layer 36b are individually formed.
The upper barrier sheet layer 36a is bonded to the upper half 45 during the injection molding of the upper half 45, and the lower barrier sheet layer 36b is bonded to the lower half 46 during the injection molding of the lower half 46. The
Thereafter, the upper bonding surface 47c of the upper bonding portion 47 and the lower bonding surface 48c of the lower bonding portion 48 are melted by heating, and the upper bonding surface 47c and the lower bonding surface 48c are pressure-bonded, whereby the upper half body 45 and the lower half 46 are integrated.

FIG. 5 is an explanatory view of the main part of the injection molding of the upper half body 45.
The upper half 45 of the fuel tank body 35 is formed by a mold 53A.
The mold 53A includes a cavity mold 60 disposed on the upper surface (outer surface) 45a side of the upper half body 45, and a core mold 70 disposed on the lower surface (inner surface) 45b side of the upper half body 45. A space between the cavity mold 60 and the core mold 70 forms a molding space 45c in which the upper half 45 is molded by being filled with resin.

In the cavity mold 60, a gate part (resin injection gate part) 61 is formed. The opening 61a of the gate part 61 has a square shape. The opening 61a of the gate portion 61 is provided at a position where the upper surface 45a of the upper half 45 is formed, and is a so-called direct gate. Resin is injected into the gate portion 61 from an injection portion 54 (see FIG. 4) of the injection molding machine. The resin that has passed through the opening 61a of the gate portion 61 is filled into the molding space 45c of the mold 53A. In the molding space 45c, the resin flow direction becomes downstream as the distance from the opening 61a of the gate portion 61 increases. Hereinafter, the upstream side means the upstream side in the resin flow direction, and the downstream side means the downstream side in the resin flow direction.

A flat plate portion 62 is formed around the opening 61 a of the gate portion 61. On the downstream side of the flat plate portion 62, a flat plate portion 63 that bulges toward the core mold 70 and narrows the molding space 45c is formed.

The core mold 70 is formed with a conical depression (wall surface) 71 at a position facing the opening 61 a of the gate 61. The depression 71 is recessed in a V shape when viewed from the side. The opening width w 1 of the opening 71 a of the hollow portion 71 is larger than the opening width w 0 of the opening 61 a of the gate portion 61. Resin that has entered through the opening 61 a is likely to enter the inside of the recess 71. The opening width w 1 of the hollow portion 71 may be approximately the same as the opening width w 0 of the gate portion 61. The resin injected from the gate part 61 enters the dent part 71 and is easily retained in the dent part 71.

An annular recess (annular recess) 72 is formed on the downstream side of the recess 71. The annular recess 72 is recessed with respect to the mold surface of the core mold 70. The depth h 2 of the annular recess 72 is set shallower than the depth h 1 of the recess 71. The annular recess 72 is more likely to overflow than the recess 71 when the resin flows in. The annular recess 72 is formed to face the boundary position between the flat plate portion 62 and the flat plate portion 63 of the cavity mold 60. The resin is guided by the flat plate portion 62 and the flat plate portion 63 so as to easily flow into the annular recess 72. The annular recess 72 includes a bottom portion 73 and an inclined portion 74 that is inclined with respect to the bottom portion 73 and becomes shallower toward the downstream side.

When the upper half 45 is injection-molded, the upper barrier sheet layer 36 a is set in the core mold 70.
The upper barrier sheet layer 36 a is shaped in advance according to the shape of the lower surface 45 b of the upper half 45. As shown in FIG. 2, the upper barrier sheet layer 36 a has a container shape with an open lower surface. The upper barrier sheet layer 36 a is arranged at the position of the opening-shaped opening edge 36 a 1 disposed along the upper bonding portion 47, the opening-shaped oil-filling port 36 a 2 formed at the position of the fuel-filling port 31, and the gate 61. And an opening 80 formed accordingly. The opening edge portion 36a1 and the oil filler port portion 36a2 are bent and joined in a state of being embedded in the resin of the upper half 45.

As shown in FIG. 5, the opening 80 of the upper barrier sheet layer 36 a is disposed on the radially outer side of the opening 61 a so as to surround the opening 61 a of the gate portion 61. Since the upper barrier sheet layer 36 a has the opening 80 outside the opening 61 a of the gate portion 61, it is easy to avoid contact with the high-temperature and high-pressure resin immediately after flowing from the gate portion 61.
The opening 80 includes an annular plate-like bent portion 81. The bent shape portion 81 is bent so as to be away from the main flow portion where the resin flows. The bent portion 81 is bent so that the upstream side is deeper. The bent portion 81 is accommodated in the annular recess 72 of the core mold 70. The bent shape portion 81 includes an end portion 82 disposed on the bottom portion 73 of the annular recess 72 and an inclined portion 83 disposed on the inclined portion 74 of the annular recess 72.

After the upper barrier sheet layer 36a is set on the core mold 70, the cavity mold 60 and the core mold 70 are closed and tightened. Resin is injected from the gate portion 61 to fill the molding space 45c between the cavity mold 60 and the core mold 70 with resin.

The resin injected into the gate portion 61 flows along the gate portion 61 as indicated by an arrow A1. Since the opening width w 1 of the recessed portion 71 is larger than the opening width w 0 of the gate portion 61, most of the resin flows into the recessed portion 71. The remaining resin flows downstream along with the resin overflowing from the depression 71 as indicated by an arrow A2.
Resin that has flowed into the depression 71 stays in the depression 71 to form a resin reservoir 84. In the resin reservoir 84, the direction and pressure in which the resin flows is leveled. The resin in the recess 71 flows as indicated by an arrow A3 by being guided by the wall surface of the V-shaped core mold 70 in a side view, and gradually overflows from the recess 71 and moves to the downstream side.
By forming the resin reservoir 84 in the recess 71, rectification in the flow direction can be promoted while extracting air contained in the resin flowing in from the gate 61.

On the downstream side of the depression 71, the resin flows along the upper barrier sheet layer 36a as indicated by the arrow A5 while entering the annular recess 72 as indicated by the arrow A4. The upper barrier sheet layer 36 a includes a bent portion 81 disposed in the annular recess 72, and the resin that enters the annular recess 72 flows so as to press the upper barrier sheet layer 36 a against the core mold 70. It is possible to prevent the resin from turning around in the direction in which the upper barrier sheet layer 36a is peeled off, and the bonding strength between the upper barrier sheet layer 36a and the injected resin can be improved.

Regardless of the resin flow pressure, the resin easily enters the annular recess 72, and even if the resin flow pressure changes, the bent portion 81 of the annular recess 72 is easily pushed reliably. For this reason, the influence of the flow pressure of the resin on the bonding strength of the upper barrier sheet layer 36a can be suppressed, and the quality of the resin molded product in which the upper barrier sheet layer 36a is inserted can be further improved.
A resin reservoir 84 protrudes into the opening 80 of the upper barrier sheet layer 36a, and the rectified resin easily flows through the bent portion 81. Since the rectified resin flows into the upper barrier sheet layer 36a, the bent portion 81 can be prevented from peeling off.

When the filling of the resin is completed, the resin is cooled while the pressure is applied to the resin. When the resin is cooled and solidified, an upper half 45 corresponding to the shape of the molding space 45c is formed.
An upper barrier sheet layer 36 a is insert-bonded to the upper half 45.
A solidified resin pool 84 is formed according to the depression 71. The resin reservoir 84 thickens the inner part of the opening 80 of the upper barrier sheet layer 36a. The resin reservoir 84 can increase the thickness portion of the gate portion 61 at the position facing the opening 61a, and can reduce the influence of being not covered by the upper barrier sheet layer 36a.

An annular convex portion 85 is formed according to the annular concave portion 72. The annular convex portion 85 is joined in a state where the bent shape portion 81 of the opening 80 of the upper barrier sheet layer 36a is accommodated.
Resin portion 86 is formed in accordance with gate portion 61.
The cavity mold 60 and the core mold 70 are opened, the solidified upper half 45 is taken out, the resin part 86 solidified by the gate 61 is cut out, and the upper surface 45a of the upper half 45 is cut off as shown in FIGS. A portion (removal portion) 86a is formed.
Thus, the upper half body 45 to be welded shown in FIG. 4 is formed.

FIG. 6 is an explanatory view of a main part of the injection molding of the lower half body 46.
The lower half 46 of the fuel tank body 35 is formed by a mold 53B.
The mold 53B includes a cavity mold 90 disposed on the lower surface (outer surface) 46a side of the lower half body 46, and a core mold 100 disposed on the upper surface (inner surface) 46b side of the lower half body 46. A space between the cavity mold 90 and the core mold 100 forms a molding space 46c in which the lower half 46 is molded by being filled with resin.

In the cavity mold 90, a gate part (resin injection gate part) 91 is formed. The opening 91a of the gate 91 is circular. The gate portion 91 is disposed in a cut portion 120 that is a resin layer cut when the pump attachment port 44 (see FIG. 2) is formed. The gate portion 91 is a so-called direct gate. Resin is injected into the gate portion 91 from the injection portion 54 (see FIG. 4) of the injection molding machine. The resin that has passed through the opening 91a of the gate 91 is filled into the molding space 46c of the mold 53B. In the molding space 46 c, the further away from the opening 91 a of the gate portion 91, the more downstream.

A flat portion (upstream mold surface) 92 is formed around the opening 91 a of the gate portion 91. The plane part 92 is larger than the cutting position 92a where the opening-shaped pump attachment port 44 (see FIG. 2) is formed. A stepped portion 94 that forms a step with respect to the planar portion 92 is formed downstream of the planar portion 92. The step portion 94 includes a horizontal wall 94a formed by a downstream end portion of the flat portion 92, a vertical wall 94b orthogonal to the horizontal wall 94a, and a tapered wall 94c formed at the downstream end portion of the vertical wall 94b. . The resin that has flowed along the flat portion 92 is easy to move along the stepped portion 94 and the flow of the resin is easily changed.

A plurality of recessed hole-shaped holding portions 95 are formed on the downstream side of the stepped portion 94. The holding plate 95 holds an insert plate 119 having a weld bolt 118. The insert plate 119 is an annular plate-like member, and four weld bolts 118 are welded to the same circumference at equal intervals on one surface 119b, and the other surface 119a is formed as a flat surface. Yes. By holding the weld bolt 118 in the holding portion 95, the insert plate 119 is disposed in the molding space 46 c so as to surround the gate portion 91.
On the upstream side of the holding part 95, a throttle part (resistor part) 96 having a shape in which the mold surface bulges toward the molding space 46c is provided. The throttle part 96 becomes a resistance against the flow of the resin and reduces the flow rate of the resin.

The insert plate 119 is arranged to be offset toward the cavity mold 90 with respect to the upstream plane portion 92. The other surface 119 a of the insert plate 119 is offset δ in a direction orthogonal to the flat surface portion 92. The resin flowing along the flat surface portion 92 is difficult to directly contact the side portion (side surface) 119c of the insert plate 119, and the insert plate 119 is difficult to receive pressure from the side.

In the core mold 100, a flat surface portion 101 is formed at a position facing the opening 91a of the gate portion 91. A guide type surface portion (gradual change type surface portion) 102 is formed on the downstream side of the flat surface portion 101. The guide mold surface portion 102 has an inclined shape in which the mold surface bulges toward the cavity mold 90 as it proceeds downstream. As shown in FIG. 2, the thickness of the resin layer of the lower half 47 is larger on the upstream side closer to the gate portion 91 and smaller on the downstream side away from the gate portion 91 due to the guide mold surface portion 102.

As shown in FIG. 6, the guide mold surface portion 102 is formed from a position upstream of the stepped portion 94 and is formed to a position downstream of the insert plate 119.
The resin is guided to the cavity mold 90 side by the guide mold surface portion 102. The resin guided to the cavity mold 90 side easily applies pressure to the surface 119a of the insert plate 119.

An annular recess (annular groove) 103 is formed at the upstream end of the guide mold surface portion 102. The annular recess 103 is recessed with respect to the mold surface of the core mold 100.

During the injection molding of the lower half 46, the lower barrier sheet layer 36b is set in the core mold 100.
The lower barrier sheet layer 36 b is shaped in advance according to the shape of the upper surface 46 b of the lower half 46. As shown in FIG. 2, the lower barrier sheet layer 36b has a container shape with an open upper surface. The lower barrier sheet layer 36 b includes an opening-like opening edge 36 b 1 disposed along the lower bonding portion 48 and an opening 110 formed according to the position of the gate portion 91. The opening edge 36b1 is bent and joined in a state of being embedded in the resin of the lower half 46.

As shown in FIG. 6, the opening 110 of the lower barrier sheet layer 36 b is disposed on the radially outer side of the opening 91 a so as to surround the opening 91 a of the gate 91. In the lower barrier sheet layer 36b, since the opening 110 is outside the opening 91a of the gate 91, it is easy to avoid contact with the high-temperature and high-pressure resin immediately after flowing in from the gate 91. .
The opening 110 includes an annular plate-like bent portion 111. The bent shape portion 111 is bent so as to be away from the main flow portion where the resin flows. The bent shape portion 111 has a bent shape corresponding to the mold surface shape of the guide mold surface portion 102 of the core mold 100. The bent portion 111 has an inclined shape that bulges toward the cavity mold 90 as it proceeds downstream. An end portion 112 of the bent shape portion 111 is bent upward and is accommodated in the annular recess 103 of the core mold 100.

After the lower barrier sheet layer 36b is set on the core mold 100, the cavity mold 90 and the core mold 100 are closed and tightened. Resin is injected from the gate portion 91, and the molding space 46c of the cavity mold 90 and the core mold 100 is filled with the resin.
The resin injected into the gate portion 91 flows along the gate portion 91 as indicated by arrows B1 and B2. When the resin flows into the molding space 46c from the gate portion 91, the flow direction is changed as indicated by an arrow B3, and the molding is sandwiched between the planar portion 92 of the cavity mold 90 and the planar portion 101 of the core mold 100. It flows through the space 46c. When passing through the space sandwiched between the flat portion 92 and the flat portion 101, the high-temperature and high-pressure resin immediately after flowing in from the gate portion 91 is easily rectified.

On the downstream side of the flat surface portion 101, the resin flows along the lower barrier sheet layer 36b while entering the annular recess 103 as indicated by an arrow B4. The lower barrier sheet layer 36 b includes the end 112 of the bent portion 111 disposed in the annular recess 103, and the resin that enters the annular recess 103 presses the lower barrier sheet layer 36 b against the core mold 100. To flow. It is possible to prevent the resin from turning around in the direction in which the lower barrier sheet layer 36b is peeled off and to improve the bonding strength between the lower barrier sheet layer 36b and the injected resin.

Further, since the resin enters the annular recess 103, the lower barrier sheet layer 36b is easily pushed by the resin. In addition, the bent portion 111 disposed on the guide mold surface portion 102 receives a force pushed from the resin toward the core mold 100 as a reaction for guiding the resin toward the insert plate 119. Therefore, even if there is a change in the flow pressure of the resin, the lower barrier sheet layer 36b is easily pushed, and the influence of the flow pressure of the resin on the bonding strength of the lower barrier sheet layer 36b can be suppressed. The quality of the resin molded product in which the layer 36b is inserted can be further improved.

The guide mold surface portion 102 and the bent shape portion 111 gradually bulge toward the cavity mold 90 side from the upstream side (one side) to the downstream side (the other side) at a position facing the surface 119a of the insert plate 119. The shape of the resin layer is gradually changed. The resin is guided to the cavity mold 90 side and easily flows toward the surface 119a of the insert plate 119 as indicated by an arrow B5. Since the direction in which the resin flows toward the surface 119a of the insert plate 119 can be deflected, the insert plate 119 is likely to receive pressure from the resin on the surface 119a. Since the insert plate 119 is pushed toward the cavity mold 90, the insert plate 119 is hardly lifted or twisted by the flow of the resin, and displacement and deformation of the insert plate 119 can be prevented.

In particular, the insert plate 119 is disposed on the downstream side of the stepped portion 94 of the cavity mold 90, and the surface 119a of the insert plate 119 is offset δ toward the cavity mold 90 with respect to the flat surface portion 92 located on the upstream side. Has been. As indicated by the arrow B5, the resin flowing toward the insert plate 119 flows along the surface 119a of the insert plate 119 as indicated by the arrow B7, or the step portion 94 and the insert plate 119 as indicated by the arrow B6. It flows between the side portions 119c and flows along the surface 119b of the insert plate 119 as indicated by an arrow B8. Since the pressure difference due to the flow rate difference between the

surfaces

119a and 119b on both sides of the insert plate 119 can be generated by the offset δ, the insert plate 119 can be easily pressed against the cavity mold 90 side, and further, the displacement and deformation of the insert plate 119 can be prevented. .

The annular recess 103 for accommodating the end 112 of the lower barrier sheet layer 36b is formed on the upstream side with respect to the arrangement position of the insert plate 119. Therefore, the resin can be stably guided to the insert plate 119 side by the guide mold surface portion 102 while preventing the lower barrier sheet layer 36b from being bent by the annular recess 103, and the flow of the resin to the insert plate 119 is inhibited. There is nothing to do. Therefore, the quality can be further improved with respect to the insert bonding of the lower barrier sheet layer 36b and the insert plate 119.

When the filling of the resin is completed, the resin is cooled while the pressure is applied to the resin. When the resin is cooled and solidified, a lower half 46 corresponding to the shape of the molding space 46c is formed.
A lower barrier sheet layer 36 b is insert-bonded to the lower half 46.
An insert plate 119 and a weld bolt 118 are insert-coupled to the lower half 46.
An annular convex portion 114 is formed according to the annular concave portion 103. The annular protrusion 114 is coupled in a state where the end 112 of the opening 110 of the lower barrier sheet layer 36b is accommodated.
A step 113 is formed according to the step 94, and a horizontal wall 113a, a vertical wall (wall surface) 113b, and a taper wall 113c are formed according to the horizontal wall 94a, the vertical wall 94b, and the taper wall 94c.
A gradually changing thick portion (resin layer) 115 is formed in accordance with the guide mold surface portion 102. The gradually changing thickness portion 115 includes an upstream inflow portion 115 a formed at a position between the guide die surface portion 102 of the core die 100 and the flat portion 92 of the cavity die 90. Further, the gradually changing thickness portion 115 is formed with a recess 115 b in accordance with the throttle portion 96.
A cut portion 120 is formed between the gate portion 91 and the plane portion 92 and the plane portion 101.

FIG. 7 is an explanatory view of the lower half body 46 as viewed from the upper surface (inner surface) 46b side.
With reference to FIGS. 6 and 7, the lower half 46 is cut into a circular shape at a cutting position 92 a set between the annular convex portion 114 and the stepped portion 113. Thereby, the cut portion 120 having the resin of the gate portion 91 is removed.
The lower half 46 is formed with a planar cut portion (removal portion) 116 cut into an opening.
In the lower barrier sheet layer 36b, a portion on the end 112 side of the bent portion 111 is cut off, and a planar cut portion (opening) 117 cut into an opening larger than the opening 110 is formed. The The excision part 116 and the excision part 117 are formed to be flush with each other, and constitute a pump attachment port (an opening for attaching an auxiliary device, an opening for attaching a related part) 44.
In the present embodiment, the opening 110 of the lower barrier sheet layer 36b is disposed and molded in the cut portion 120 to be cut. And since it cuts in the cutting position 92a which is spaced apart from the edge part 112 of the opening part 110 of the lower side barrier sheet layer 36b and which does not generate | occur | produce, the bonding quality of the lower side barrier sheet layer 36b is improved. Further, since the resin of the gate portion 91 is also removed at the same time as the excision process for forming the pump attachment port 44, the process can be simplified.
As described above, the lower half body 46 to be welded shown in FIG. 4 is formed.

FIG. 8 is an explanatory diagram of the mounting structure of the fuel pump 43.
The fuel pump 43 is attached to the lower half 46 of the fuel tank 30 after welding.
The fuel pump 43 includes a cylindrical pump main body 43a and a flange 121 provided at the lower part of the pump main body 43a. Four fixing holes (not shown) are formed in the flange portion 121, and each weld bolt 118 is inserted into the fixing hole (not shown).
The pump main body 43 a is inserted into the pump attachment port 44, and the flange 121 is brought into contact with the lower surface 46 a of the lower half 46.

An O-ring (seal member) 122 is disposed between the pump body 43a and the step part (seal member joint) 113 of the lower half 46. The O-ring 122 seals a gap between the lower half body 46 and the pump main body 43a. The O-ring 122 is positioned easily by being disposed in contact with the horizontal wall 113a and the vertical wall 113b of the step 113. The O-ring 122 also improves the alignment accuracy with respect to the insert plate 119. The O-ring 122 is less displaced with respect to the fuel pump 43 fixed to the insert plate 119, and it is easy to reliably seal the gap.

The flange portion 121 of the fuel pump 43 is formed with a contact portion 121a that contacts the O-ring 122 from below. Since the O-ring 122 is abutted from three sides by the horizontal wall 113a, the vertical wall 113b, and the abutting portion 121a, the deformation control of the O-ring 122 is easy and it is easier to seal. The inclination of the taper wall 113c makes it easy to insert the pump main body 43a into the pump attachment port 44.

A flange pressing ring plate 123 is disposed below the flange portion 121. The flange pressing ring plate 123 includes an annular plate-shaped plate portion 123a. A fixing hole (not shown) is formed in the plate portion 123a, and each weld bolt 118 is inserted into the fixing hole (not shown). A bent piece-like guard portion 123b is formed integrally with the plate portion 123a. The plate portion 123a presses the flange portion 121 of the fuel pump 43 from below, and the guard portion 123b protects the fuel pump outlet 127 from the outside. A fuel hose (not shown) is connected to the fuel pump outlet 127.

A flange portion 121 of the fuel pump 43, a plate portion 123a of the flange pressing ring plate 123, a flat washer 124, and a locking washer 125 are attached to the weld bolt 118 in this order, and finally a nut 126 is fastened. Thereby, the fuel pump 43 is attached to the fuel tank 30.
In the present embodiment, the resin fuel tank 30 is formed in which deformation and twisting of the barrier sheet layer 36 are suppressed, and displacement of the insert plate 119 is suppressed.

As described above, according to the present embodiment to which the present invention is applied, the upper half body 45 has the upper barrier sheet layer 36 a on the inner surface, and the lower half body 46 has the lower barrier sheet layer 36 b. In the fuel tank 30,

openings

80 and 117 are provided in the barrier sheet layers 36a and 36b,

gate portions

61 and 91 are disposed facing the positions of the

openings

80 and 117, and the opening of the barrier sheet layers 36a and 36b. The edge portions of the

portions

80 and 117 have bent

shape portions

81 and 111 that are bent in a direction away from the flow direction of the resin from the

gate portions

61 and 91. Therefore, the

gate portions

61 and 91 are disposed in the

openings

80 and 117 of the barrier sheet layers 36a and 36b, and the edges of the

openings

80 and 117 of the barrier sheet layers 36a and 36b are resin from the

gate portions

61 and 91. By making the shape bent in the direction away from the flow direction, the resin can be prevented from turning around in the direction of peeling off the barrier sheet layers 36a and 36b, and the bonding strength between the barrier sheet layers 36a and 36b and the injected resin can be improved.

According to the present embodiment to which the present invention is applied, in the fuel tank 30 having the upper barrier sheet layer 36 a on the inner surface of the upper half body 45 and the lower barrier sheet layer 36 b on the inner surface of the lower half body 46, the

barrier Openings

80 and 117 are provided in the surfaces of the sheet layers 36a and 36b, and cut

portions

86a and 116 from which the resin of the

gate portions

61 and 91 is removed are provided at positions facing the

openings

80 and 117. On the edge of 117,

bent shape portions

81 and 111 are provided which are bent from the

cut portions

86a and 116 toward the inner surfaces of the

half bodies

45 and 46. Therefore, the

gate portions

61 and 91 are disposed in the

openings

80 and 117 of the barrier sheet layers 36a and 36b, and the edges of the

openings

80 and 117 of the barrier sheet layers 36a and 36b are resin from the

gate portions

In the present embodiment, a resin reservoir 84 is provided at a position facing the gate portion 61, and the resin reservoir 84 enters the opening 80 of the upper barrier sheet layer 36a and has a V-shaped wall surface facing the gate portion 61. It is the shape made to protrude in a shape. Accordingly, the resin reservoir 84 is sized to enter the opening 80 of the upper barrier sheet layer 36a, and the wall surface facing the gate portion 61 is protruded in a V shape so that air contained in the resin from the gate portion 61 is removed. In addition, rectification in the flow direction can be promoted, and the thick part of the wall surface of the upper half 45 can be increased instead of having the upper barrier sheet layer 36a.

Further, in the present embodiment, the fuel tank 30 has the cut portion 120 cut and removed as the pump attachment port 44, and the cut portion (opening) 117 of the lower barrier sheet layer 36 b faces the cut portion 120. ing. Accordingly, the cut portion 117 which is separated from the end portion 112 of the opening portion 110 of the lower barrier sheet layer 36b on the downstream side in the flow direction by having the cut portion 117 of the lower barrier sheet layer 36b face the cut portion 120. Since the cut portion 117 is formed by cutting at the position 92a, the quality of the cut portion 117 is improved.

In the present embodiment, the end portions of the

bent portions

81 and 111 of the barrier sheet layers 36a and 36b are inserted into the annular

convex portions

85 and 114 formed in the

half bodies

45 and 46, respectively. Accordingly, since the end portions of the

bent portions

convex portions

85 and 114 formed on the thermoplastic resin layer, the annular

convex portions

85 and 114 cause the resin to The influence of the fluid pressure can be suppressed, and the quality of the bonding strength of the barrier sheet layers 36a and 36b can be further improved.

According to the present embodiment to which the present invention is applied, in the method of manufacturing a resin tank having the barrier sheet layers 36a and 36b on the inner surface of the thermoplastic resin layer, the

openings

80 and 110 in the barrier sheet layers 36a and 36b are provided. The

gate portions

61 and 91 are disposed, and the edge portions of the

openings

80 and 110 have bent

shape portions

81 and 111 bent in a direction away from the flow direction of the resin from the

gate portions

61 and 91. , 111 causes the resin from the

gate portions

61 and 91 to flow. Therefore, the resin peels the barrier sheet layers 36a and 36b by causing the resin from the

gate portions

61 and 91 to flow in the

bent shape portions

81 and 111 bent in the direction away from the flow direction of the resin from the

gate portions

61 and 91. It is possible to prevent the barrier sheet layers 36a and 36b and the injected resin from joining to each other.

In the present embodiment, the wall 71 facing the gate portion 61 is projected in a V shape to form a resin reservoir 84 that enters the opening 80 of the upper barrier sheet layer 36a. Therefore, the resin reservoir 84 located at the position opposite to the gate portion 61 can promote the rectification in the flow direction while extracting the air contained in the resin from the gate portion 61 and has no upper barrier sheet layer 36a. Furthermore, the thick part of the wall surface of the upper half 45 can be increased.

Further, in the present embodiment, the lower barrier sheet layer 36b and the resin layer of the lower half body 46 are cut out with an opening shape larger than the opening 110 of the lower barrier sheet layer 36b, and the pump mounting port 44 is formed. Form. Therefore, since the opening 110 of the lower barrier sheet layer 36b faces the cut portion 120, there is no occurrence of wrinkling separated from the end 112 of the opening 110 of the lower barrier sheet layer 36b on the downstream side in the flow direction. Since the cut is made at the cutting position 92a, the quality of the cut off

portions

116 and 117 is improved.

In the present embodiment, the

end portions

82 and 112 of the

bent shape portions

81 and 111 of the barrier sheet layers 36a and 36b are disposed in the

annular recesses

72 and 103 provided on the downstream side of the

gate portions

61 and 91, respectively. Resin from the

gate portions

61 and 91 is caused to flow in the

bent shape portions

81 and 111. Therefore, since the

end portions

82 and 112 of the

bent portions

81 and 111 of the barrier sheet layers 36a and 36b are inserted into the

annular recesses

72 and 103, the influence of the flow pressure of the resin is suppressed by the

annular recesses

72 and 103. And the quality can be further improved.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
A resin pool that enters the opening 110 may be formed when the lower half 46 is formed, and may be cut out together with the resin pool.
The step portion 113 where the insert plate 119 is disposed has the configuration including the horizontal wall 113a, the vertical wall 113b orthogonal to the horizontal wall 113a, and the tapered wall 113c. However, the vertical plate 113b may be omitted, and the insert plate 119 may be offset and disposed in the step portion 113 including the horizontal wall 113a and the tapered wall 113c inclined with respect to the horizontal wall 113a.
The horizontal wall 113a may be inclined with respect to the horizontal direction, and the vertical wall 113b may be inclined with respect to the vertical direction.

36a Upper barrier sheet layer (barrier layer)
36b Lower barrier sheet layer (barrier layer)
44 Pump mounting port (opening for mounting related parts)
45 Upper half (thermoplastic resin layer)
46 Lower half (thermoplastic resin layer)
61, 91 Gate part (resin injection gate part)
71 hollow (wall surface)
72, 103

annular recess

80, 110

opening

81, 111

bent portion

82, 112 end 84

resin pool

85, 114 annular convex 86a, 116 excision (removal part)
117 Excision (opening)
120 Excision

Claims

In the resin tank having the barrier layers (36a, 36b) on the inner surfaces of the thermoplastic resin layers (45, 46), the barrier layers (36a, 36b) are provided with openings (80, 117), and the openings (80 117) facing the position of the resin injection gate portion (61, 91), the edge of the opening (80, 117) of the barrier layer (36a, 36b) is the resin injection gate portion (61). 91), a resin tank having a barrier layer, characterized by having bent portions (81, 111) bent in a direction away from the flow direction of the resin.
In a resin tank having a barrier layer (36a, 36b) on the inner surface of the thermoplastic resin layer (45, 46), an opening (80, 117) is provided in the surface of the barrier layer (36a, 36b). The removal portion (86a, 116) from which the resin of the resin injection gate portion (61, 91) is removed is provided at a position facing the portion (80, 117), and an edge of the opening (80, 117) is provided at the edge of the opening portion (80, 117). A resin tank having a barrier layer, characterized in that a bent portion (81, 111) bent from the removing portion (86a, 116) to the inner surface side of the thermoplastic resin layer (45, 46) is provided. .
A resin reservoir (84) is provided at a position opposite to the resin injection gate portion (61), and the resin reservoir (84) enters the opening (80) of the barrier layer (36a) and the resin injection 3. The resin tank having a barrier layer according to claim 1, wherein the wall surface facing the gate portion (61) has a V-shape.
The resin tank has a cut portion (120) cut and removed as an opening (44) for mounting related parts, and the opening (117) of the barrier layer (36b) is exposed to the cut portion (120). A resin tank having a barrier layer according to claim 1, wherein the resin tank has a barrier layer.
An end (82) of the bent portion (81) of the barrier layer (36a) is inserted into an annular convex portion (85) formed in the thermoplastic resin layer (45). Item 5. A resin tank having the barrier layer according to any one of Items 1 to 4.
In the method for manufacturing a resin tank having a barrier layer (36a, 36b) on the inner surface of the thermoplastic resin layer (45, 46), a resin injection gate is provided in the opening (80, 110) of the barrier layer (36a, 36b). Bend portions (81, 91), and the edges of the openings (80, 110) are bent in a direction away from the resin flow direction from the resin injection gate portion (61, 91). 111), and the resin from the resin injection gate portion (61, 91) is caused to flow into the bent shape portion (81, 111). A method for producing a resin tank having a barrier layer,
The wall surface (71) facing the resin injection gate portion (61) is projected in a V shape to form a resin pool (84) that enters into the opening (80) of the barrier layer (36a). A method for producing a resin tank having a barrier layer according to claim 6.
The barrier layer (36b) and the thermoplastic resin layer (46) are cut out in an opening shape larger than the opening (110) of the barrier layer (36b), and an opening (44) for mounting related parts. The method for producing a resin tank having a barrier layer according to claim 6 or 7, wherein:
In the annular recesses (72, 103) provided on the downstream side of the resin injection gate portions (61, 91), the end portions (82, 82) of the bent portions (81, 111) of the barrier layers (36a, 36b) are provided. 112) is disposed, and the resin from the resin injection gate portion (61, 91) is caused to flow into the bent shape portion (81, 111). Of manufacturing a resin tank having a barrier layer.