JP2017164939A - Method of manufacturing liner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the positional displacement of liner parts when welding the liner parts.SOLUTION: A first liner part of the first liner part and a second liner part constituting a liner, which are objects to be welded, has a metal plate disposed on a peripheral wall of the first liner part so as to project outward from an edge part of the liner part. In the second liner part, the radius of an inner wall plane of a peripheral wall at an edge part of the liner part of the second liner part is larger than a distance from a central axis of the liner part to an outer peripheral plane of the metal plate. The second liner part is positioned guided by the metal plate of the first liner part so that the peripheral wall of the second liner part covers the metal plate.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for manufacturing a liner.

  The liner is used as a core material of a high-pressure gas tank, and is integrated by welding a plurality of liner parts (for example, Patent Document 1).

Japanese Patent No. 45525316

  In this patent document, an annular member separate from the liner part is arranged on the inner periphery of the joint part between the liner parts, thereby increasing the welding area of the welding end face to ensure strength, but the following The problem has been pointed out. Since the annular member and the end face of the liner part are flush with the liner axis and are substantially perpendicular, there is a possibility that displacement occurs when the end faces of the liner part are joined.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

(1) According to one form of this invention, the manufacturing method of a liner is provided. The liner manufacturing method is a method for manufacturing a liner in which a plurality of resin liner parts are aligned with each other at a joint portion and integrally joined, and the first liner part to be joined Of the second liner parts, the first liner part is disposed on the peripheral wall of the first liner part so as to protrude in the axial direction of the central axis of the liner part from the end of the first liner part that is a joining position. Radius of the inner wall surface of the peripheral wall of the second liner part as a liner part having a heat-resistant plate that does not melt by heating, and the second liner part at the end of the second liner part that becomes a joint location Steps to prepare as a liner part with a gap between the central axis of the liner part and the outer peripheral surface of the heat-resistant plate (1 And aligning the first liner part end and the second liner part end with the heat resistant plate as a guide so that the peripheral wall of the second liner part covers the heat resistant plate of the first liner part. And a step (3) of joining the end portion of the first liner part and the end portion of the second liner part in a heated and softened state.

  In this form of the liner manufacturing method, the second liner part is aligned using the heat-resistant plate protruding in the axial direction of the central axis of the liner part from the end of the liner part of the first liner part as a guide. The positional deviation in the radial direction can be easily suppressed. In addition, since the heat-resistant plate does not melt by heating at the time of joining the first and second liner parts, it can function as a guide when joining and welding both liner parts.

(2) In the above aspect, in the step (1), the first liner part may be prepared by forming the heat-resistant plate in a ring shape continuous in the circumferential direction of the first liner part peripheral wall. In this way, the second liner part can be easily guided over the entire area of the end of the liner part, and the shape of the liner at the end of the liner part, which is the joining / welding part of the first and second liner parts, can be changed to the ring of the metal plate. It can be a circular shape following the shape. There are also the following advantages.

  In the manufacturing method of this embodiment, when the first and second liner parts are joined and welded at the end of the liner part, the welding beat accompanying the welding is the second liner part overlapping the heat-resistant plate having a ring shape. 2 The liner inner peripheral wall side of the end surface of the end of the liner part, which is the welding part, is covered with the heat resistant plate together with the beat root of the welding beat while spreading in the gap between the peripheral wall of the liner part and the heat resistant plate or the peripheral region of the heat resistant plate. As a result, according to the liner manufacturing method of this embodiment, the ring-shaped heat-resistant plate can make it difficult to develop a notch on the liner inner peripheral wall side.

(3) In the above aspect, in the step (1), the first liner in which a plurality of the heat-resistant plates are arranged on the peripheral wall of the first liner part so as to be scattered around the axis of the liner part central axis. Parts may be prepared. By doing so, the guide location by the heat-resistant plate becomes a plurality of locations around the axis of the liner part central axis, so that the guide function of the second liner part can be reliably ensured.

(4) In any one of the above forms, in the step (1), the first liner part is prepared in such a manner that the heat-resistant plate has a shape having a through hole in a portion overlapping the second liner part peripheral wall. May be. In this way, the welding beat accompanying the welding can be filled in the through hole of the heat-resistant plate, and the welding beat filled in the through hole has a so-called anchor effect, so that the first and second liner parts are aligned along the central axis of the liner part. The mechanical strength against tension can be increased.

  Note that the present invention can be realized in various modes. For example, it can be realized in the form of a liner or a liner manufacturing apparatus.

It is explanatory drawing which shows schematic structure of the liner obtained with the manufacturing method of this embodiment. It is process drawing which shows schematically the manufacturing process of the liner in the liner manufacturing method of this embodiment. It is explanatory drawing which shows schematically the dome part prepared together with a cylinder part. It is explanatory drawing which shows schematically the dome part prepared in the state of a single item. It is an expanded sectional view which expands and shows the 5-5 line cross section in FIG. It is explanatory drawing which shows the mode of the principal part of the shaping | molding of the dome part which has a metal ring plate by insert molding. It is explanatory drawing which shows roughly the mode of alignment of the cylinder part with respect to a dome part. It is explanatory drawing which shows the mode of a heating of a liner parts edge part roughly. It is explanatory drawing which shows the mode of welding of a liner parts edge part roughly. It is explanatory drawing which shows roughly the dome part prepared with the manufacturing method of 2nd Embodiment in the state of a single item. It is explanatory drawing which shows roughly the mode of positioning of the cylinder part with respect to the dome part prepared with the manufacturing method of 2nd Embodiment. It is explanatory drawing which shows the mode of the heating of a liner part edge part, and the mode of the parts welding by subsequent pressing and holding | maintenance later on in order. It is explanatory drawing which shows roughly the dome part prepared with the manufacturing method of 3rd Embodiment in the state of a single item. It is explanatory drawing which illustrates roughly the shape of a metal plate seen from the B direction in FIG. 13, and the mode of a dimension regulation. It is explanatory drawing which shows roughly the dome part prepared to have the metal plate of a 1st modification in the state of a single item. It is explanatory drawing which shows roughly the dome part prepared so that it may have the metal plate of a 2nd modification in the state of a single item. It is explanatory drawing which shows roughly the mode of the welding of the liner parts edge part of a 3rd modification.

  FIG. 1 is an explanatory view showing a schematic configuration of a liner 10 obtained by the manufacturing method of the present embodiment. The liner 10 is a hollow tank container, and includes a dome portion 20 at both ends in the longitudinal direction and a cylinder portion 30 therebetween as a plurality of resin liner parts, and these liner parts are integrally joined. . The dome portion 20 is a molded product molded with an appropriate resin such as a nylon resin, and the cylinder portion 30 is a molded product obtained by extruding an appropriate resin such as a nylon resin into a cylindrical shape. Then, the liner 10 is formed by aligning the two liner parts with each other at the joining location and then joining and welding at the end of the parts to integrate them. Through this part integration, the liner 10 becomes a gas-barrier resin hollow container having a spherical dome 20 on both sides of a cylindrical cylinder 30. In addition, each figure after FIG. 1 shows each liner part schematically, and does not show each part reflecting the actual size.

  The liner 10 includes a base 40 at the top of one dome portion 20, and a base 50 at the top of the other dome portion 20. Both the cap 40 and the cap 50 mounted in this way are formed of a lightweight metal such as aluminum or an alloy thereof, and the cap 40 includes a through hole for a high-pressure seal taper screw for mounting a valve (not shown). The base 50 includes concentric bottomed holes on the outer and inner sides of the liner. The two caps cantilever the dome 20 together with a dome holding jig (not shown) during liner production, and during the tank production, the fiber reinforced resin layer is formed on the outer periphery of the liner and the liner 10 is rotated during various measurements. Functions as a support around the axis. The through hole of the base 40 and the bottomed hole outside the liner of the base 50 are used as a cantilever support receiving part at the time of manufacturing the liner or as a receiving part around the rotation axis at the time of manufacturing the tank.

  The dome part 20 and the cylinder part 30 are first and second liner parts to be welded, and the dome part 20 which is the first liner part of both liner parts is a metal ring plate which is a heat-resistant plate. 22R is interposed and welded to the cylinder portion 30 as the second liner part. The shape of the metal ring plate 22R, the state of its arrangement, the state of welding, and the like will be described in detail in the manufacturing process described later.

  FIG. 2 is a process diagram schematically showing the manufacturing process of the liner 10 in the liner manufacturing method of the present embodiment. As shown in FIG. 2, in the production of the liner 10, the two dome parts 20 and the cylinder part 30 which are liner parts are prepared (step 110), the alignment of both liner parts (step 120), and the end of the liner part. Heating (step 130) and liner part welding (step 140) are sequentially performed as follows.

Liner part preparation step: step 110;
3 is an explanatory view schematically showing the prepared dome portion 20 together with the cylinder portion 30, and FIG. 4 is an explanatory view schematically showing the prepared dome portion 20 in a single item state. FIG. 6 is an enlarged cross-sectional view showing a cross section taken along line 5-5 in FIG. 3, and FIG. .

  The dome portion 20 prepared in step 110 includes a metal ring plate 22R at the dome opening side end portion 20e. The metal ring plate 22R is disposed on the dome peripheral wall 20s at the dome opening end 20e, and protrudes outward along the liner central axis CX from the dome opening end 20e. The metal ring plate 22R is configured by connecting both ends of a flat plate of a metal steel plate having corrosion resistance and heat resistance such as stainless steel (SUS316) or aluminum alloy (A6061) so as to form a ring shape, and the dome portion 20 is formed by insert molding. Are integrally installed. The dome peripheral wall 20s on which the metal ring plate 22R is disposed has an inner diameter of about 200 to 400 mm and a thickness of about 2 to 5 mm. The dome opening side end 20e corresponds to the first liner part end in the present invention, and the dome peripheral wall 20s corresponds to the first liner part peripheral wall. The liner central axis CX is the central axis of the liner 10 as a finished product, and is also the central axis of the liner parts of the dome portion 20 and the cylinder portion 30.

  Since the dome portion 20 is before welding, as shown in FIG. 5, the end surface of the dome opening side end portion 20 e is a welding front end surface 20 es protruding from the welding end surface 21, and the welding front end surface 20 es and the welding end surface 21. Is defined as a melt-softening region 20y accompanying welding. The welding end surface 21 is a surface to be welded of the welding end surface 31 of the cylinder portion 30 which is the second liner part, and the dome portion 20 includes a welding portion YS (described later) including both the welding end surfaces and the melt softening portion 20y. 8)) and is welded and fixed to the cylinder portion 30. In the welded part YS, the melt softening of the melt softened part 20y of the dome part 20 including the welded end face 21 and the melt softening of the melted softened part 30y described later of the cylinder part 30 including the welded end face 31 are performed during the liner manufacturing process. As a result, in the liner 10 as a finished product, the welding end face 21 and the welding end face 31 cannot be distinguished. Therefore, in FIG. 5, the welding end surface 21 and the welding end surface 31 are shown with the virtual line. The same applies to cross-sectional views from FIG.

  The dome portion 20 projects the metal ring plate 22R outward from the pre-welding end surface 20es of the dome opening side end portion 20e along the liner central axis CX in a single product state before the welding. In the present embodiment, the metal ring plate 22R having a width of about 40 to 50 mm is projected from the pre-welding end face 20es by a length of about 5 to 10 mm. The metal ring plate 22R has a thickness in the range of 0.5 to 2.0 mm so that the shape can be maintained at the time of insert molding and part welding described later, and a plurality of base side through holes 24 are formed. Prepare with equal pitch. The metal ring plate 22R is incorporated in the first mold K1 and the second mold K2 shown in FIG. The metal ring plate 22R incorporated in the mold may be a ring shape in which both ends of the flat plate of the above-mentioned width are connected by welding or an adhesive or the like. It may be in the form of a ring in contact with or in close proximity. The dome portion 20 is insert-molded integrally with the metal ring plate 22R by the molten resin poured into the mold cavity 20Ca in which the metal ring plate 22R is incorporated. Therefore, the base side through hole 24 of the metal ring plate 22R is filled with the resin that forms the dome portion 20. In the present embodiment, the position of the base side through hole 24 is defined as follows.

  The cavity end surface K1e in the first mold K1 defines a pre-welding end surface 20es in the dome opening side end portion 20e of the dome portion 20 shown in FIG. The length of the melt-softening portion 20y from the welding front end face 20es to the welding end face 21 (see FIG. 5) has been defined in terms of design as a region that causes the melt softening of the resin. Therefore, in the present embodiment, an interval 24d from the pre-welding end surface 20es (cavity end surface K1e) to the peripheral edge of the base side through hole 24 is secured to be 3.5 mm or more so that the base side through hole 24 is separated from the welding end surface 21. I did it. Moreover, about the hole diameter of the base side through-hole 24, it was set as the hole diameter of the range of 0.5-10 mm from ensuring of resin filling and plate size.

  The metal ring plate 22R is separated from the liner central axis CX to the outer peripheral surface of the metal ring plate 22R in a state of being integrated into the dome portion 20 by insert molding, in other words, the plate outer periphery from the liner central axis CX. The plate separation distance 22r to the surface is defined in order to obtain the cylinder part 30 to be welded to the dome part 20. This point will be described together with the cylinder part 30.

  The cylinder part 30 as the second liner part is prepared as a cylindrical extruded product having a predetermined length, and the opening end face of the cylinder opening side end part 30e becomes the welding target face of the welding end face 21 of the dome part 20. The weld end surface 31 is used. As shown in FIG. 3 and FIG. 5, the outer diameter of the cylinder portion 30 is substantially the same as the outer diameter of the dome opening side end portion 20 e of the dome portion 20 including the cylinder opening side end portion 30 e. . In addition, since the length along the liner central axis CX is before welding, the end surface of the cylinder opening side end portion 30e is set as a pre-welding end surface 30es protruding from the welding end surface 31, and is welded to the pre-welding end surface 30es. A space between the end surface 31 and a melt softening portion 30y accompanying welding is defined. Even in the length of the melt-softened portion 30y, it is already defined in terms of design as a region that causes the resin to be softened, like the melt-softened portion 20y. Further, in step 110, the cylinder part 30 is prepared as a cylindrical extruded product in which the radius of the inner wall surface of the cylinder peripheral wall 30s at the cylinder opening side end part 30e is not less than the plate separation distance 22r described above. Therefore, the outer peripheral surface of the metal ring plate 22R in the prepared dome portion 20 and the inner wall surface of the cylinder peripheral wall 30s of the cylinder portion 30 separate the gap 30sd. In the present embodiment, the plate separation distance 22r of the metal ring plate 22R and the inner wall surface radius of the cylinder peripheral wall 30s of the cylinder part 30 are defined so that the gap 30sd is 0.5 to 2.0 mm. The cylinder opening side end 30e corresponds to the second liner part end in the present invention, and the cylinder peripheral wall 30s corresponds to the second liner part peripheral wall.

Liner part alignment step: step 120;
FIG. 7 is an explanatory diagram schematically showing how the cylinder portion 30 is aligned with the dome portion 20.

  In the alignment step of step 120 following the part preparation in step 110, first, as shown in the upper part of FIG. 7, the cylinder portion 30 is disposed between the dome portions 20 facing each other. At this time, the facing dome portions 20 are cantilevered by a horizontal holding jig (not shown) using the base 40 and the base 50 as cantilever receiving portions so that the liner central axes CX of the respective dome portions coincide with each other. In such a state, the dome part 20 is moved relative to the cylinder part 30 side, or the cylinder part 30 is moved relative to the dome part 20 side. At the time of this relative movement, as shown in the lower part of FIG. 7, the cylinder part 30 is aligned with the dome part 20 using the metal ring plate 22R as a guide so that the cylinder peripheral wall 30s covers the metal ring plate 22R of the dome part 20. Is done. The positional relationship of each part at the time of completion of this alignment is shown in an enlarged view of FIG. 7, and the welding front end face 30 es at the cylinder opening side end 30 e of the cylinder part 30 is on the dome opening side of the dome part 20. The cylinder peripheral wall 30s covers the metal ring plate 22R, and the gap 30sd is formed between the inner wall surface of the cylinder peripheral wall 30s and the upper surface of the metal ring plate 22R. In addition, also in the enlarged view of FIG. 7, the welding end surface 21 and the welding end surface 31 are shown with the virtual line as mentioned above.

Liner part heating step: step 130;
FIG. 8 is an explanatory view schematically showing how the liner part end is heated.

  In the heating step of step 130 following the alignment in step 120, the welding portion YS including the dome opening side end 20e of the dome portion 20 and the cylinder opening side end portion 30e of the cylinder portion 30, more specifically in the enlarged view of FIG. Infrared rays are irradiated from the infrared welding apparatus Hm toward the melt-softened part 20y and the melt-softened part 30y shown. Infrared radiation is continuously executed for a predetermined time (radiation time) defined as the occurrence of melt softening of the resin at the melt softening portion 20y and the melt softening portion 30y. By this infrared radiation, the melt-softened portion 20y including the pre-welding end surface 20es of the dome portion 20 and the melt-softening portion 30y including the pre-welding end surface 30es of the cylinder portion 30 are heated, and the resin is melt-softened at these portions.

Liner part welding step: step 140;
FIG. 9 is an explanatory view schematically showing a state of welding at the end of the liner part.

  The welding process in step 140 following the heating in step 130 is performed after the infrared radiation time has elapsed and the infrared welding apparatus Hm is stopped. In this step 140, using a pressing jig (not shown), the dome portions 20 on both sides of the cylinder portion 30 are pressed toward the cylinder portion 30 along the liner central axis CX, and the pressed state is maintained. This pressing causes mixing of the molten resin in the welded portion YS including the melt-softened portion 20y of the heated dome portion 20 and the melt-softened portion 30y of the cylinder portion 30 shown in FIG. 8, and the dome passes through this resin mixture. The welding end surface 21 of the part 20 and the welding end surface 31 of the cylinder part 30 are in close contact with each other. Then, as shown in the enlarged view of FIG. 9, the dome opening side end portion 20e including the welding end surface 21 and melt softened, and the cylinder opening side end portion 30e including the welding end surface 31 and melt softened are processed in step 140. Due to the above-described pressing, welding is performed at the welding site YS shown in the drawing. Along with this welding, the welding beat YB fills the gap 30sd (see FIG. 7) between the cylinder peripheral wall 30s and the outer peripheral surface of the metal ring plate 22R, and then spreads in the peripheral region of the metal ring plate 22R. The cylinder peripheral wall 30s including is covered with a metal plate together with the beat root of the welding beat YB. In addition, also in the enlarged view of FIG. 9, the welding end surface 21 and the welding end surface 31 are shown with the virtual line as mentioned above.

  In step 140, the above-described pressing is held for a predetermined time, specifically, the time until the resin cooling of the welded portion YS is completed, and then cooling and curing are performed. And the liner 10 which has the dome part 20 in the both ends of the cylinder part 30 is obtained by removing the used various jig | tool after cooling and curing. Before and after removing the jig, the welding beat YB (not shown) remaining at the welding position of the dome part 20 and the cylinder part 30 on the outer surface of the liner 10 is removed by cutting using a cutting tool, The liner 10 as the final product is obtained by grinding and removing using a polishing roller. In addition, since the above-mentioned process 130 and process 140 are carried out continuously, the dome opening side end part 20e of the dome part 20 and the cylinder opening side end part of the cylinder part 30 can be regarded as one process. It becomes the process of joining in the state which the part 30e heated and softened.

  In the manufacturing method of the liner 10 of the present embodiment described above, when the dome portion 20 and the cylinder portion 30 to be welded are welded and integrated, the liner central axis CX from the dome opening side end portion 20e of the dome portion 20 is integrated. The cylinder portion 30 is aligned with the dome portion 20 using the metal ring plate 22R protruding outward along the guide as a guide. For this reason, according to the manufacturing method of liner 10 of this embodiment, position shift with dome part 20 and cylinder part 30 used as welding object can be controlled easily by the guide function by metal ring plate 22R. In addition, since the guide function is exhibited in the entire circumferential region of the metal ring plate 22R, the cylinder portion 30 can be positioned more easily and accurately with respect to the dome portion 20. Further, since the metal ring plate 22R used for the guide is formed using the metal material described above, the heat resistance is not melted by heating at the time of joining accompanied by the welding of both liner parts of the dome part 20 and the cylinder part 30. Is provided. Therefore, according to the manufacturing method of the liner 10 of this embodiment, it can be made to function suitably as a guide also at the time of joining accompanied by welding of both liner parts of the dome part 20 and the cylinder part 30.

  In the manufacturing method of the liner 10 of this embodiment, when preparing the dome part 20 having the metal ring plate 22R protruding from the dome opening side end part 20e along the liner center axis CX, the metal ring plate 22R is integrated by insert molding. Therefore, it is possible to easily obtain the dome portion 20 in which the metal ring plate 22R is not easily dropped. In addition, since the base side through holes 24 provided in a plurality at the same pitch on the metal ring plate 22R are filled with the resin for forming the dome portion 20, the resin filled in the base side through holes 24 further increases the metal ring plate. The metal ring plate 22R can be held on the dome portion 20 by firmly fixing the metal ring plate 22R to the dome portion 20 as well as making it difficult for the 22R to fall off. As a result, even when the cylinder part 30 comes into contact with the metal ring plate 22R when the cylinder part 30 is aligned, it is difficult for the metal ring plate 22R to drop off, which causes a considerable hindrance to the alignment work of the cylinder part 30. You can avoid it.

  Further, the resin at the welded portion YS of the dome portion 20 and the cylinder portion 30 is melted and softened by heating. The melted and softened resin is applied to the metal ring plate 22R at the dome opening side end portion 20e and the cylinder opening side end portion 30e. It can be cured into a highly accurate circular shape following the ring shape. In addition to this, the following advantages are also obtained.

  According to the manufacturing method using the dome part 20 having the metal ring plate 22R, when the dome part 20 and the cylinder part 30 are welded at the welding part YS, the welding beat YB accompanying the welding is formed into a ring-shaped metal ring. The metal ring plate is expanded to the gap between the cylinder peripheral wall 30s and the metal ring plate 22R overlapping the plate 22R, or the peripheral region of the metal ring plate 22R, and the cylinder peripheral wall 30s side which is the welding site YS together with the beat root of the welding beat YB. The entire circumference is covered with 22R. As a result, according to the manufacturing method using the dome portion 20 having the metal ring plate 22R, by using the ring-shaped metal ring plate 22R, the entire circumferential area of the cylinder peripheral wall 30s, which is the welding site YS, is covered. Notch can be made difficult to develop, and the welding strength can be improved. In other words, since the welding beat YB does not remain at the joint portion between the welding end surface 21 and the welding end surface 31 of the welding site YS, the strength of the welding site YS accompanying the development of the notch can be prevented from being lowered, and the welding strength can be increased. Can do.

  In the method for manufacturing the liner 10 according to the present embodiment, the metal ring plate 22R is provided on the dome portion 20 having the existing configuration so as to protrude outward from the dome opening side end portion 20e along the liner central axis CX. The radius of the inner wall surface of the cylinder peripheral wall 30s at the cylinder opening side end 30e may be set to a plate separation distance 22r or more for the metal ring plate 22R. Therefore, the liner 10 can be easily manufactured as a liner that can suppress the positional deviation between the dome portion 20 and the cylinder portion 30 and has a high degree of positioning freedom about the liner central axis CX.

  FIG. 10 is an explanatory view schematically showing the dome part 20A prepared by the manufacturing method of the second embodiment in a single product state, and FIG. 11 is a cylinder part 30 for the dome part 20A prepared by the manufacturing method of the second embodiment. FIG. 12 is an explanatory diagram schematically showing the state of heating the liner part end and the subsequent part welding by pressing and holding in order. The dome portion 20 </ b> A is provided with a weld-side through-hole 25 in addition to a base-side through-hole 24 and a metal ring plate 22 </ b> R integrated integrally by insert molding. The welding side through hole 25 has a hole diameter in the range of 0.5 to 10 mm, similar to the base side through hole 24 described above, and the length of the melt softening portion 20y from the welding front end surface 20es to the welding end surface 21 described above. In consideration of the above, the interval 25d from the pre-welding end surface 20es (see FIG. 6: cavity end surface K1e) to the peripheral edge of the welding-side through hole 25 was set to 0.5 to 5.0 mm. By defining the interval 25d in this way, the welding-side through hole 25 is provided in the cylinder part 30 at the welding part YS in the part welding process after alignment (step 140 in FIGS. 2 and 9). It will be located in the part which overlaps with 30s of surrounding walls. Therefore, according to the manufacturing method using the dome portion 20A in which the metal ring plate 22R having the welding side through hole 25 is integrated, as shown in FIG. 12, the welding beat YB accompanying the welding is formed on the metal ring plate 22R. In addition to being able to improve the welding strength between the dome portion 20A and the cylinder portion 30 by the so-called anchor effect produced by the welding beat YB filled in the welding side through hole 25, the dome portion 20A This can also be enhanced with respect to the mechanical strength against pulling along the liner central axis CX of the cylinder portion 30.

  FIG. 13 is an explanatory view schematically showing the dome portion 20B prepared by the manufacturing method of the third embodiment in a single item state, and FIG. 14 is a diagram of the shape and dimension definition of the metal plate 22 seen from the direction B in FIG. It is explanatory drawing which illustrates a mode roughly. Instead of the ring-shaped metal ring plate 22R, the dome portion 20B is arranged on the dome peripheral wall 20s of the dome opening side end portion 20e so that the four metal plates 22 are scattered at an equal pitch around the liner central axis CX. Each of the metal plates 22 is protruded outward along the liner central axis CX from the welding front end surface 20es of the dome opening side end portion 20e. The metal plate 22 can be a rectangular plate that is curved in an arc shape following the arc opening of the dome opening side end portion 20e of the dome portion 20 using a metal steel plate having substantially the same thickness as the metal ring plate 22R described above. In addition, it can be a rectangular flat plate. As shown in FIG. 13, since the metal plate 22 has two base side through holes 24, the plate part is secured from the peripheral edge of the base side through hole 24 to the peripheral edge of the plate, and the plate part between the through holes. For securing, the plate width corresponding to the short side of the rectangular shape is about 5 times the diameter of the base side through hole 24. For example, if the hole diameter of the base side through hole 24 is 2 mm, the width of the metal plate 22 is 10 mm or more. The plate width can be appropriately changed according to the hole diameter and the number of the base side through holes 24. The plate length corresponding to the long side of the rectangular shape is about 40 to 50 mm, similar to the width of the metal ring plate 22R, and the metal plate 22 protrudes from the pre-welding end face 20es with a length of about 5 to 10 mm.

  In the present embodiment, the distance from the liner central axis CX to the outer peripheral surface of the metal plate 22 (plate separation distance 22r) is defined as follows according to the shape of the metal plate 22. As shown in FIG. 14, if the metal plate 22 is an arc plate, the plate separation distance 22r is set as the radius of the arc of the outer peripheral surface of the plate buried in the dome peripheral wall 20s. On the other hand, if the metal plate 22 is a flat plate, the plate separation distance 22r is set to the radius of an arc passing through the corner of the plate uppermost surface farthest from the liner central axis CX. Even in the manufacturing method according to the third embodiment, the metal plate 22 having an equal pitch performs the guide function of the cylinder portion 30 around the axis of the liner central axis CX, so that the positional deviation between the dome portion 20 and the cylinder portion 30 is prevented. Can be easily suppressed. Moreover, since the metal plate 22 includes the base side through-hole 24 similarly to the metal ring plate 22R, it is difficult to drop off from the dome portion 20B. The metal plate 22 may have a welding side through hole 25 in addition to the base side through hole 24. In addition, if the metal plate 22 is a flat plate, the upper surface corner of the plate is chamfered in an inclined manner. Also good.

  The cylinder part 30 to be welded to the dome part 20B having the metal plate 22 can include a cylinder peripheral wall 30s as a circular peripheral wall whose radius is larger than the plate separation distance 22r. As indicated by a chain line, the cylinder peripheral wall 30s may be provided as a recess. In the cylinder portion 30 having the cylinder peripheral wall 30s as a recess, a recess-shaped cylinder peripheral wall 30s may be provided in the cylinder opening side end portion 30e in accordance with the arrangement pitch of the four metal plates 22. By doing so, the thickness of the portion other than the recess-shaped cylinder peripheral wall 30s can be increased, so that the strength of the cylinder portion 30 can be increased and the strength of the entire liner is also increased.

  The present invention is not limited to the above-described embodiments, examples, and modifications, and can be realized with various configurations without departing from the spirit thereof. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in each embodiment described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the above-described effects, replacement or combination can be performed as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

  In the above-described embodiment, the metal ring plate 22R and the metal plate 22 are simply protruded from the dome opening end 20e, but can be modified as follows. FIG. 15 is an explanatory view schematically showing the dome portion 20 prepared to have the metal plate 22 of the first modified example in a single product state, and FIG. 16 is prepared to have the metal plate 22 of the second modified example. It is explanatory drawing which shows schematically the dome part 20 in the state of the single item. In these modified examples, since the metal plate 22 has the corner round portion 22cr and the tapered portion 20ct on the cylinder portion 30 side, the insertability of the cylinder portion 30 accompanying the positioning of the cylinder portion 30 can be improved. In addition, the metal ring plate 22R may have a slightly inclined ring surface, and the metal ring plate 22R may be provided on the dome portion 20 so that the small diameter side protrudes from the dome opening side end portion 20e. Or you may arrange | position the metal plate 22 diagonally so that it may incline slightly from the dome opening side edge part 20e to an inner diameter side. Note that the metal ring plate 22R may also have a corner radius portion 22cr and a tapered portion 20ct.

  In the above-described embodiment, the cylinder portion 30 is a cylindrical extruded product, but can be deformed as follows. FIG. 17 is an explanatory view schematically showing the state of welding of the end portions of the liner part according to the third modification. In the cylinder portion 30 of the third modification example, the cylinder peripheral wall 30s is a circular wall having a radius larger than the plate separation distance 22r as described above at the cylinder opening side end 30e, and the cylinder central wall 30s is moved from the cylinder peripheral wall 30s to the liner central axis CX. The inner cylindrical portion wall thickness along the same length as that of the metal plate 22 was set. By doing so, the thickness of the portion other than the recess-shaped cylinder peripheral wall 30s can be increased, so that the strength of the cylinder portion 30 can be increased and the strength of the entire liner is also increased. In addition, the welding beat YB can be limited and left between the peripheral wall of the cylinder peripheral wall 30s and the end face of the metal ring plate 22R.

  In the above-described embodiment, the liner 10 is a three-part product in which the dome portion 20 is welded to both sides of the cylinder portion 30, but is not limited thereto. For example, the dome portion 20 is a liner part in which a cylindrical body that reaches the half length of the cylinder portion 30 is extended from the opening end, and the dome portion 20 having the cylindrical body is welded on the cylindrical body end side. It may be a two-part product. In this case, the metal plate 22 or the metal ring plate 22R is provided on the opening end side of the cylindrical body in one of the dome portions 20, and the cylindrical peripheral wall on the opening end side of the cylindrical body in the dome portion 20 on the other side is provided. The inner peripheral surface radius may be set to the above-described plate separation distance 22r or more.

  In the above-described embodiment, the dome portion 20 and the cylinder portion 30 are melted on the side of the welding end surfaces 21 and 31 by infrared radiation from the infrared welding apparatus Hm, but by heating / melting with a heater or laser light irradiation. Heating and melting may be attempted.

  In the embodiment described above, the four metal plates 22 are arranged on the dome portion 20 at an equal pitch, but three metal plates 22 or five or more metal plates 22 are arranged at an equal pitch or an unequal pitch. May be. Moreover, you may make it change the protrusion length from the dome opening side edge part 20e of the metal plate 22 arrange | positioned by equal pitch. In this way, the metal plate 22 having the long protrusion length performs the guiding function first, and the rough alignment of the cylinder portion 30 becomes possible. With the other metal plate 22 having the short protrusion length, the subsequent cylinder portion 30 and the dome are aligned. In the relative movement with the part 20, the guide function of the cylinder part 30 can be exhibited at any time.

  In the above-described embodiment, the four metal plates 22 are arranged on the dome portion 20 at an equal pitch. However, if the metal plate 22 functions as a guide when aligning the dome portion 20 and the cylinder portion 30, a single metal plate 22 is provided. And can. For example, if the metal plate 22 is curved in accordance with the peripheral wall range of 1/3 to 1/2 of the dome peripheral wall 20s in the dome portion 20, the metal plate 22 performs a guide function in a wide range of curved portions. And can.

  In the above-described embodiment, the metal ring plate 22R and the metal plate 22 are formed using a metal steel plate such as stainless steel or aluminum alloy. However, the metal ring plate 22R and the metal plate 22 have a heat resistance that does not melt during the heating period when the dome portion 20 and the cylinder portion 30 are joined. A material having properties may be used. For example, a ring plate or a flat plate that replaces the metal ring plate 22R or the metal plate 22 is formed using a ceramic such as alumina or an engineering plastic having a heat resistance of about 300 ° C. over the heating period during bonding. May be. In addition, since the heating temperature at the time of joining changes with the property of the resin material of the dome part 20 or the cylinder part 30, what is necessary is just a material which has the heat resistance of the grade which does not melt at the temperature which the melt softening of the resin employ | adopted.

  In the above-described embodiment, the metal plate 22 and the metal ring plate 22R are integrated into the dome portion 20 by insert molding, but the plurality of metal plates 22 are bonded to the dome peripheral wall 20s at the dome opening side end portion 20e with an adhesive. The metal plate 22 may be fitted into a recess formed in accordance with the shape of the metal plate 22 by bonding. The metal ring plate 22R may be fitted to the dome peripheral wall 20s.

  In the above-described embodiment, the liner part heating step (step 130) and the liner part welding step (step 140) are performed continuously. Good. For example, after completion of alignment of the liner parts prior to heating and welding (step 120), pressing along the cylinder center axis CX between the cylinder part 30 and the dome part 20 by the pressing jig and red toward the welding part YS Infrared irradiation from the outer welding apparatus Hm is executed in parallel. By doing so, the welding portion YS is heated, melted and softened while pressing the cylinder portion 30 and the dome portion 20, so that the dome opening side end portion 20 e of the dome portion 20 and the cylinder opening side end portion of the cylinder portion 30. 30e is joined (welded) in a melted and softened state by heating.

DESCRIPTION OF SYMBOLS 10 ... Liner 20, 20A, 20B ... Dome part 20Ca ... Cavity 20ct ... Tapered part 20e ... Dome opening side edge part 20es ... Pre-welding end face 20s ... Dome peripheral wall 20y ... Melt softening part 21 ... Welding end face 22 ... Metal plate 22R ... Metal ring plate 22cr ... Round corner 22r ... Plate separation distance 24 ... Base side through hole 24d ... Interval 25 ... Welding side through hole 25d ... Interval 30 ... Cylinder part 30e ... Cylinder opening side end part 30es ... Before welding end face 30s ... Cylinder Peripheral wall 30sd ... Gap 30y ... Melt softening part 31 ... Welding end face 40 ... Base 50 ... Base CX ... Liner central axis Hm ... Infrared welding device K1 ... First mold K1e ... Cavity end face K2 ... Second mold YB ... Welding Beat YS ... welding part

Claims (4)

A method for producing a liner in which a plurality of liner parts made of resin are aligned with each other at a joining point and integrally joined,
The first liner part of the first liner part and the second liner part to be joined is protruded from the end of the first liner part to be joined in the axial direction of the central axis of the liner part. As a liner part having a heat-resistant plate that is disposed on the peripheral wall of one liner part and has a heat resistance that does not melt by heating at the time of joining, the second liner part is used as a joining part. A step (1) of preparing as a liner part in which the radius of the inner wall surface of the second liner part peripheral wall is greater than the distance from the center axis of the liner part to the outer peripheral surface of the heat-resistant plate;
A step of aligning the end of the first liner part and the end of the second liner part with the heat-resistant plate as a guide so that the peripheral wall of the second liner part covers the heat-resistant plate of the first liner part ( 2) and
A step (3) of joining the first liner part end and the second liner part end in a softened state by heating.   2. The method for manufacturing a liner according to claim 1, wherein, in the step (1), the first liner part is prepared in a ring shape in which the heat-resistant plate is continuous in a circumferential direction of the first liner part peripheral wall.   In the step (1), the first liner part is prepared in which a plurality of the heat-resistant plates are arranged on the peripheral wall of the first liner part in a dotted manner around the center axis of the liner part. The manufacturing method of the liner of description.   4. The process according to claim 1, wherein in the step (1), the first liner part is prepared by forming the heat-resistant plate in a shape having a through hole in a portion overlapping the peripheral wall of the second liner part. 5. The manufacturing method of the liner of description.

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