JP2012057652A - Flow passage forming structure and method of manufacturing this flow passage forming structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow passage forming structure without causing welding failure of a welding part even when the structure is enlarged.SOLUTION: This flow passage forming structure 1 is constituted of three or more of resin molds, and the projected area when viewed from the vertical direction to a welding surface of the welded resin mold, is restrained in 5-300 cm. For example, when welding the first resin mold 10, the second resin mold 20 and the third resin mold 30 for vibratingly welding the first resin mold 10 to one surface and vibratingly welding the second resin mold 20 to the other surface, the first resin mold 10 and the second resin mold 20 are adjusted so that the projected area becomes 5-300 cmwhen viewed from the vertical direction to the welding surface.

Description

  The present invention relates to a flow path forming structure and a method for manufacturing the flow path forming structure.

  Conventionally, as a method of joining a plurality of resin molded products made of thermoplastic resin, methods using fastening parts (bolts, screws, clips, etc.) and adhesives, hot plate welding methods, vibration welding methods, ultrasonic welding methods Laser welding methods and the like are known.

  Among such various methods, for example, the joining (welding) of a plurality of resin molded products by the vibration welding method is performed by vibrating the two resin molded products while abutting each other and applying pressure to each other. In this method, the contact surfaces of the products are melted and joined (for example, see Patent Document 1).

  According to the vibration welding method using the frictional energy as described above, since the resin molded product can be melted in a short time, a plurality of resin molded products can be welded in a short time. That is, the vibration welding method is a welding method with excellent productivity. Therefore, the welding of multiple resin molded products by the vibration welding method is adopted in the manufacturing process of various resin products, mainly in the manufacturing process of resin products such as automotive parts that are composed of multiple resin molded products joined together. Has been.

As an example of the resin product manufactured by the vibration welding method, there is a flow path forming structure in which a flow path for passing a fluid such as gas or liquid is formed inside the resin product.
For example, Patent Document 2 discloses a flow path forming structure formed by welding a plurality of resin molded products by a laser welding method or a vibration welding method. Patent Document 3 discloses an air intake structure in which a plurality of resin molded products are welded by a vibration welding method.

JP 2010-052191 A JP 2006-071079 A JP 2002-089387 A

  By the way, a plurality of resin molded products to be vibration welded are individually manufactured in advance, but a minute warp is generated on the surface of the manufactured resin molded product. The amount of warpage generated on the surface of the resin molded product increases as the size of the resin molded product increases. If the warpage occurring on the surface of the resin molded product with the other resin molded product becomes large, a problem such as a gap formed in a part of the welded portion arises, and the welded portion adheres closely. The nature will decline. That is, sufficient frictional energy is not generated on the welded surface, and poor welding may occur at the welded portion where the two resin molded products are welded.

In the flow path forming structure, if welding failure occurs in the welded part, it leads to leakage of the fluid flowing through the flow path. For this reason, conventionally, a large-sized flow path forming structure is vibrated by using a large resin molded product having a projected area of about 300 cm ² or more when viewed from a direction perpendicular to the welding surface. It was difficult to manufacture by.

  Accordingly, an object of the present invention is to provide a flow path forming structure that is less likely to cause poor welding at the welded portion even when the structure is enlarged.

The inventors of the present invention have made extensive studies to solve the above problems. As a result, the flow path forming structure is constituted by three or more resin molded products, and the projected area of the resin molded product to be welded when viewed from the direction perpendicular to the welding surface is 5 cm ² or more and 300 cm ^2. By suppressing to the following, it discovered that the said subject could be solved and came to complete this invention. More specifically, the present invention provides the following.

(1) A first resin molded product, a second resin molded product, and a third resin in which the first resin molded product is vibration welded on one surface and the second resin molded product is vibration welded on the other surface. A molded product, a first flow path formed between the first resin molded product and the third resin molded product, and a first channel formed between the second resin molded product and the third resin molded product. A second flow path, and a third flow path formed on the third resin molded product and connecting the first flow path and the second flow path, the first resin molded product and the second resin molded product. Is a flow path forming structure having a projected area of 5 cm ² or more and 300 cm ² or less when viewed from a direction perpendicular to the welding surface.

  (2) The third resin molded product is provided in at least a part of a position corresponding to a first welding surface which is a welding surface between the first resin molded product and the third resin molded product on the one surface. A first support surface substantially parallel to the first welding surface and at least a position corresponding to a second welding surface which is a welding surface between the second resin molded product and the third resin molded product on the other surface. A flow path forming structure according to (1), comprising a second support surface provided in part and substantially parallel to the second welding surface.

  (3) The first support surface is provided at a position corresponding to one end side of the first welding surface and a position corresponding to the other end side, and the second support surface is one end side of the second welding surface. The flow path forming structure according to (2), which is provided at a position corresponding to 1 and a position corresponding to the other end side.

  (4) The flow path forming structure according to any one of (1) to (3), wherein the first resin molded product and / or the second resin molded product includes an amount of a light-impermeable resin material.

  (5) The flow path forming structure according to any one of (1) to (4), wherein the resin molded product has a polyphenylene sulfide-based resin as a main component.

  (6) The first resin molded product has a partition wall, and a fourth flow path formed between the first resin molded product and the third resin molded product, the fourth flow path, A fifth flow path connecting the second flow path, and the partition wall is provided to partition the first flow path and the fourth flow path from any one of (1) to (5) 2. A flow path forming structure according to 1.

  (7) The flow path forming structure manufacturing method according to any one of (1) to (6), wherein the first resin molded product is disposed on one surface of the third resin molded product. A resin molded product arranging step, a first channel forming step of forming the first channel by vibration welding the first resin molded product arranged on the one surface to the third resin molded product, and the first A second resin molded product placement step of placing the second resin molded product on the other surface of the three resin molded product, and vibrating the second resin molded product placed on the other surface to the third resin molded product. A flow path forming structure comprising: a second flow path forming step of welding to form the second flow path.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where a structure is enlarged, the flow-path formation joined body which cannot produce the welding defect of a welding part easily can be provided.

It is the figure which showed the flow path formation structure 1 of this invention typically, Fig.1 (a) is a top view of the flow path formation structure 1, FIG.1 (b) is the flow path formation structure 1 of FIG. FIG. 1C is a side view, and FIG. 1C is a sectional view taken along line XX in FIG. FIG. 2A is a schematic view showing the first resin molded product 10, FIG. 2A is a perspective view of the first resin molded product, and FIG. 2B is a bottom view of the first resin molded product 10. It is a schematic diagram which shows the 2nd resin molded product 20, Fig.3 (a) is a perspective view of a 2nd resin molded product, FIG.3 (b) is a top view of a 2nd resin molded product. FIG. 4A is a schematic view of the third resin molded product 30, FIG. 4A is a perspective view of the third resin molded product 30, and FIG. 4B is a plan view of the third resin molded product 30. FIG. 4C is a bottom view of the third resin molded product 30. It is a schematic diagram which shows the conventional flow-path formation structure 5, FIG. 5 (a) is a perspective view of the conventional flow-path formation structure, FIG.5 (b) is the YY line | wire of Fig.5 (a). It is sectional drawing. 6A and 6B are schematic views showing the rectangular resin molded product 50 shown in FIG. 5, FIG. 6A is a perspective view of the rectangular resin molded product 50, and FIG. 6B is a side view of the rectangular resin molded product 50. FIG. 7A is a schematic view of a flow path forming structure 1A according to the second embodiment, FIG. 7A is an exploded side view of the flow path forming structure 1A, and FIG. 7B is a side view of the flow path forming structure 1A. FIG. 7C is a side sectional view in the flow direction of the flow path. It is a figure which shows the cross section of the flow direction of the flow path of another form with 1st embodiment and 2nd embodiment. It is a figure which shows the flow-path formation structure of 1st embodiment and 2nd embodiment of another form.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  The present invention is a flow path forming structure formed by welding a plurality of resin molded products. FIG. 1 is a diagram schematically showing a flow path forming structure 1 according to the first embodiment of the present invention, where (a) is a plan view of the flow path forming structure 1 and (b) is a flow chart. It is a side view of the path | route formation structure 1, (c) is XX sectional drawing of FIG.1 (b).

  As shown to Fig.1 (a)-(c), the flow-path formation structure 1 of 1st embodiment is the 1st resin molded product 10, the 2nd resin molded product 20, and the 3rd resin molded product 30. And a flow path 40 formed by these three resin molded products. As shown in FIG. 1B, the flow path forming structure 1 includes a first resin molded product 10 that is vibration welded to a first surface 31 that is one surface of the third resin molded product 30. The second resin molded product 20 is vibration welded to the second surface 32 that is the other surface of the three resin molded product 30.

FIG. 2 is a diagram schematically showing the first resin molded product 10, (a) is a perspective view of the first resin molded product, and (b) is a bottom view of the first resin molded product 10.
As shown in FIG. 2, the first resin molded product 10 has a substantially rectangular parallelepiped shape, and has a groove-shaped first recess 11 formed on one surface and a first recess 11 on this one surface. And a first welding scheduled end face 12 which is a non-existing region.

The 1st recessed part 11 is extended in the longitudinal direction of the 1st resin molded product 10, and one end is open | released and the other end is closed.
The first welding scheduled end face 12 is a part that comes into contact with the third resin molded product 30 during vibration welding. That is, the planned welding end surface 12 is a surface to be welded to the third resin molded product 30, and the projected area when the first resin molded product 10 is viewed from a direction perpendicular to the surface to be welded is 5 cm ² or more. 300 cm ² or less.

FIG. 3 is a diagram schematically showing the second resin molded product 20, (a) is a perspective view of the second resin molded product, and (b) is a plan view of the second resin molded product.
As shown in FIG. 3, the second resin molded product 20 has a substantially rectangular parallelepiped shape, and is formed with a groove-shaped second recess 21 formed on one surface and a second recess 21 on this one surface. And a second welding scheduled end face 22 which is a non-region.

The 2nd recessed part 21 is extended in the longitudinal direction of the 1st resin molded product 20, and one end is open | released and the other end is closed.
The second welding scheduled end face 22 is a part that comes into contact with the third resin molded product 30 during vibration welding. That is, the planned welding end surface 22 is a surface that is welded to the third resin molded product 30, and the projected area when the first resin molded product 20 is viewed from the direction perpendicular to the surface to be welded is 5 cm ² or more. 300 cm ² or less.
The width W2 of the second resin molded product 20 (the length in the direction perpendicular to the longitudinal direction on one surface) is the width W1 (on one surface) of the second resin molded product 20 as shown in FIG. (Length in a direction perpendicular to the longitudinal direction).

FIG. 4 is a diagram schematically showing the third resin molded product 30, (a) is a perspective view of the third resin molded product 30, and (b) is a plan view of the third resin molded product 30. (C) is a bottom view of the third resin molded product 30.
As shown in FIG. 4, the third resin molded product 30 has a plate shape and includes a through hole (a third flow path 43 described later), a first support surface 321, and a second support surface 311.

The through hole is formed through the third resin molded product 30 in the thickness direction.
As shown in FIG. 4C, the first support surface 321 is provided on the second surface 32 of the third resin molded product 30. The first support surface 321 is a range surrounded by a first welding surface 312 (a dotted line in FIG. 4B) that is a welding surface between the first resin molded product 10 and the third resin molded product 30 on the first surface 31. ) At least part of the position corresponding to the first welding surface 312 (in the first embodiment, the entire region corresponding to the first welding surface 312). Here, the position corresponding to the first welding surface 312 indicates a position overlapping the first welding surface 312 in plan view.
The first support surface 321 is preferably provided at least at a position corresponding to one end side in the longitudinal direction or the width direction of the first welding surface 312 and a position corresponding to the other end side in the longitudinal direction or the width direction. .

  The second support surface 311 is provided on the first surface 31 of the third resin molded product 30. The second support surface 311 is a range surrounded by a second welding surface 322 (a dotted line in FIG. 4C) that is a welding surface between the second resin molded product 20 and the third resin molded product 30 on the second surface 32. ) At least a part of the position corresponding to the second welding surface 322. In 1st embodiment, the 2nd support surface 311 is provided in the part except the surface in which the 1st resin molded product 10 exists among the positions corresponding to the 2nd welding surface 322. FIG. That is, the second support surface 311 has a position corresponding to one end side in the longitudinal direction of the second welding surface 322, a position corresponding to the other end side, a position corresponding to one end side in the width direction of the second welding surface 322, and others. It is provided at a position corresponding to the end side. In the present embodiment, the second support surface 311 is provided so as to occupy 50% or more of the area of the position corresponding to the second welding surface 322.

The channel 40 includes a first channel 41, a second channel 42, and a third channel 43, as shown in FIG.
The first flow path 41 is formed between the first resin molded product 10 and the third resin molded product 30. More specifically, the first flow path 41 is formed by a space surrounded by the first recess 11 (see FIG. 2A) of the first resin molded product 10 and the first surface 31 of the third resin molded product 30. Is done.
The second flow path 42 is formed between the second resin molded product 20 and the third resin molded product 30. More specifically, the first flow path 42 is formed by a space surrounded by the second recess 21 (see FIG. 3A) of the second resin molded product 20 and the second surface 32 of the third resin molded product 30. Is done.
The third flow path 43 is formed so as to penetrate the front and back of the third resin molded product 30.

Next, a method for manufacturing the flow path forming structure 1 of the present invention will be described.
The manufacturing method of the flow path forming structure 1 of the first embodiment includes a resin molded product manufacturing step, a first resin molded product arranging step, a first welding step, a second resin molded product arranging step, and a second welding. And a process.

  In the resin molded product manufacturing process, the first resin molded product 10 having the first recess 11, the second resin molded product 20 having the second recess 21, and the third resin molded product 30 having a through hole are manufactured. The 1st resin molded product 10, the 2nd resin molded product 20, and the 3rd resin molded product 30 are manufactured by injection molding, for example.

  The kind of resin material for manufacturing these resin molded products is not particularly limited. The resin contained in the resin material may be either a crystalline thermoplastic resin or an amorphous thermoplastic resin. Among conventionally known resins, it is particularly preferable to use polyarylene sulfide-based resins (particularly polyphenylene sulfide resins). Here, examples of the polyarylene sulfide resin include polyarylene sulfide resins and modified products of polyarylene sulfide resins described in JP-A-2009-178967. The resin material may be a resin composition containing a plurality of resins. The resin material is a resin composition to which additives such as nucleating agents, carbon black, inorganic baked pigments, antioxidants, stabilizers, plasticizers, lubricants, mold release agents and flame retardants are added. May be.

  In the first resin molded product arrangement step, the first resin molded product 10 is arranged on the first surface 31 of the third resin molded product 30. More specifically, the first resin molded product 30 is such that the position on the closed end side of the first recess 11 coincides with the position of the through hole of the third resin molded product 30, and the first welding planned end surface 12. Are arranged so as to coincide with the position of the first welding surface 312.

  In the first welding step, the first resin molded product 10 disposed on the first surface 31 is vibration welded to the first surface 31 of the third resin molded product 30. Thereby, the 1st resin molded product 10 and the 3rd resin molded product 30 are joined, and the 1st flow path 41 is formed.

Specifically, vibration welding is performed according to the following procedure.
First, the first resin molded product 10 and the third resin molded product 30 are fixed with a jig so that the first resin molded product 10 is disposed on the first surface 31 of the third resin molded product 30. Here, about the 1st resin molded product 10, the whole upper surface (surface located in the opposite side to the 1st welding planned end surface 12) of the 1st resin molded product 10 is suppressed with a jig | tool. Moreover, about the 3rd resin molded product 30, the 1st support surface 321 (range shown with the shaded line in FIG.4 (c)) is suppressed with a jig | tool.
Next, heat is applied to the contact surface by using a conventionally known vibration welding apparatus so that the first resin molded product 10 and the third resin molded product 30 are rubbed against each other by the vibration. With this heat, the vicinity of the contact surfaces of the first resin molded product 10 and the third resin molded product 30 is melted. Then, the first resin molded product 10 and the third resin molded product 30 are pressed against the first resin molded product 10 and the third resin molded product 30 while applying pressure to the contact surface to crush these molten parts. The molded product 30 is vibration welded.

  In the second resin molded product arrangement step, the second resin molded product 20 is arranged on the second surface 32 of the third resin molded product 30. More specifically, the second resin molded product 20 is such that the position of the closed end side of the second recess 21 coincides with the position of the through hole of the third resin molded product 30, and the second welding planned end surface 22. Are arranged so as to coincide with the position of the second welding surface 322.

  In the second welding step, the second resin molded product 20 disposed on the second surface 32 of the third resin molded product 30 is vibration welded to the third resin molded product 30. Thereby, the 2nd resin molded product 20 and the 3rd resin molded product 30 are joined, and the 2nd flow path 42 is formed.

  In the vibration welding of the second resin molded product 20 and the third resin molded product 30, first, the second resin molded product 20 is arranged so that the second resin molded product 20 is disposed below the second surface 32 of the third resin molded product 30. The resin molded product 20 and the third resin molded product 30 are fixed with a jig. Here, about the 2nd resin molded product 20, the whole lower surface (surface located in the opposite side to the 2nd welding scheduled end surface 22) of the 2nd resin molded product 20 is suppressed with a jig | tool. Moreover, about the 3rd resin molded product 30, the 2nd support surface 311 (range shown with the shaded line in FIG.4 (b)) is suppressed with a jig | tool. Thereafter, heat is applied to the contact surface and pressurization is performed in the same manner as the vibration welding of the first resin molded product 10 and the third resin molded product 30.

According to the flow path forming structure of the present invention, the following effects are exhibited.
First, problems of the conventional flow path forming structure will be described. FIG. 5 is a view schematically showing a conventional flow path forming structure 5, (a) is a perspective view of the conventional flow path forming structure, and (b) is a YY line of (a). It is sectional drawing. As shown in FIG. 5, the conventional flow path forming structure 5 includes a rectangular resin molded product 50 and a plate-shaped resin molded product 60. As shown in FIG. 5, the conventional flow path forming structure 5 is formed by arranging a rectangular resin molded product 50 on one surface of a plate-shaped resin molded product 60 and performing vibration welding. As a result of the vibration welding, a flow path 70 is formed inside the conventional flow path forming assembly 5 as shown in FIG.

FIG. 6 is a view schematically showing the rectangular resin molded product 50, (a) is a perspective view of the rectangular resin molded product 50, and (b) is a side view of the rectangular resin molded product 50. As shown in FIG. 6, the rectangular resin molded product 50 includes a groove-shaped recess 51 and a planned welding end surface 52.
When the rectangular resin molded product 50 has a projected area of more than 300 cm ² when the rectangular resin molded product 50 is viewed from a direction perpendicular to the welding surface, warpage increases. The warp is a bow-like deformation as shown in FIG. As shown in FIG. 6B, the warp amount Δz is defined as the amount of deviation from the horizontal plane when the rectangular resin molded product 50 is disposed so that the planned end face 52 is in contact with the horizontal plane. The term “warping increases” means that the warping amount Δz exceeds approximately 1 mm.

When the warpage amount Δz exceeds about 1 mm, the friction at the time of vibration welding at the contact surface between the planned end surface 52 and one surface of the plate-shaped resin molded product 60 tends to be insufficient. If the friction on the contact surface is insufficient, the rectangular resin molded product 50 and the plate-shaped resin molded product 60 in the vicinity of the contact surface are insufficiently melted or unevenly melted, and a gap is formed in the welded portion. This causes poor welding. If poor welding occurs, fluid leaks through the flow path.
For this reason, in the conventional method, a flow path forming structure in which a long or large flow path is formed such that the projected area when viewed from a direction perpendicular to the welding surface exceeds 300 cm ^2. Is difficult to manufacture.

On the other hand, the flow path forming structure 1 of the present invention has a first flow path 41 formed on the first surface 31 of the third resin molded product 30 and a second flow path 42 formed on the second surface 32. Are connected by a third flow path 43 that penetrates the first surface 31 and the second surface 32 of the third resin molded product 30 to form a flow path 40. As a result, in the present invention, it is not necessary to vibration weld two large resin molded products when forming a large or long channel. In other words, according to the present invention, by forming the flow path forming structure 1 by vibration welding the three resin molded products, the projected area when the resin molded product is viewed from the direction perpendicular to the welding surface is 300 mm. ^A large or long flow path can be formed while suppressing to ² or less. Therefore, the flow path forming structure 1 of the present invention is less likely to cause the above-described welding failure during vibration welding. In particular, by adjusting the projected area when the resin molded product is viewed from the direction perpendicular to the welding surface to 250 mm ² or less, the problem of poor welding can be further suppressed.

  The third resin molded product 30 is provided on at least a part of a position corresponding to the first welding surface, which is a welding surface between the first resin molded product 10 and the third resin molded product 30, on the first surface 31. The second surface 32 has a first support surface 321 substantially parallel to the welding surface. By performing vibration welding while holding the first support surface 321 substantially parallel to the welding surface with a jig, it becomes easy to apply pressure uniformly to the welding surface during vibration welding. By rubbing the welding surface while applying pressure uniformly and applying heat to the welding surface, it becomes easy to uniformly melt the vicinity of the welding surface, and problems of poor welding such as uneven welding can be further suppressed.

  The third resin molded product 30 is provided on at least a part of the second surface 32 at a position corresponding to the second welding surface that is a welding surface between the second resin molded product 20 and the third resin molded product 30. The first surface 31 has a second support surface 311 substantially parallel to the two welding surfaces. The second support surface 311 has the same effect as the first support surface 321. That is, the problem of poor welding between the third resin molded product 30 and the second resin molded product 20 can be further suppressed.

The width W2 of the second resin molded product 20 (the length in the direction orthogonal to the longitudinal direction on one surface) is the width W1 of the second resin molded product 20 (the length in the direction orthogonal to the longitudinal direction on one surface). More widely configured.
For this reason, the 1st support surface 321 is each provided in the position corresponding to the one end side of the 1st welding surface 312 and the position corresponding to the other end side. For this reason, the position corresponding to the both ends of a 1st welding surface can be hold | maintained with a jig | tool at the time of vibration welding. As a result, it becomes easier to apply a uniform pressure to the welding surface during vibration welding, and the problem of poor welding between the first resin molded product 10 and the third resin molded product 30 can be sufficiently suppressed.

The 2nd support surface 311 is each provided in the position corresponding to the one end side of the longitudinal direction of the 2nd welding surface 322, and the position corresponding to the other end side of a longitudinal direction. By providing the second support surface 311 in this way, the second support surface 311 has the same effect as the first support surface 321. That is, the problem of poor welding between the third resin molded product 30 and the second resin molded product 20 can be sufficiently suppressed.
In particular, the support surface as described above occupies 50% or more of the projected area when the resin molded product is viewed from a direction perpendicular to the welding surface, thereby further holding the resin molded product during vibration welding. This makes it easier to cause the problem of poor welding.

Generally, a vibration welding method, a laser welding method, a hot plate welding method, an electromagnetic induction heating welding method, or a die slide injection (DSI) is employed as a manufacturing method of the flow path forming structure. A molding method suitable for manufacturing the flow path forming structure as in the present invention is a vibration welding method or a laser welding method. When the resin molded product is made of a light-impermeable resin material, the laser welding method cannot be adopted.
Therefore, in the conventional method, it is a resin molded product made of a light-impermeable resin material, and it has been extremely difficult to manufacture a flow path forming structure in which a long or large flow path is formed. Accordingly, even if a resin molded product made of a light-impermeable resin material is used, a flow path forming structure in which poor welding hardly occurs. Examples of the light-impermeable resin material include a resin material containing a resin such as a polyamide resin, a polypropylene resin, a polybutylene terephthalate resin, and a polyphenylene sulfide resin as a main component and a colored resin material.

  As the resin contained as a main component in the resin material, it is particularly preferable to use a polyarylene sulfide-based resin (especially polyphenylene sulfide resin) for the reason that each resin molded product is very excellent in rigidity. The present invention can be preferably practiced by using other resins as the main component.

  According to the manufacturing method of the flow path forming structure 1 of the present invention, the first flow path 41 formed between the first surface 31 of the third resin molded product 30 and the first resin molded product 10, and the third resin molded product. The second flow path 42 formed between the second surface 32 of the product 30 and the second resin molded product 20 is formed so as to penetrate the first surface 31 and the second surface 32 of the third resin molded product 30. By connecting the third flow path 43, the flow path forming structure having a long or large flow path while suppressing the projected area when the resin molded product is viewed from the direction perpendicular to the welding surface is kept below a certain level. Can be manufactured. Since the projected area when the resin molded product is viewed from the direction perpendicular to the welding surface is suppressed to a certain level or less, the problem of poor welding is unlikely to occur.

  Next, a second embodiment of the flow path forming structure according to the present invention will be described with reference to FIG. FIG. 7 is a diagram schematically showing a flow path forming structure 1A of the second embodiment, (a) is an exploded side view of the flow path forming structure 1A, and (b) is a flow path forming structure. It is a side view of 1A, (c) is side surface sectional drawing of the flow direction of a flow path. In the description after the second embodiment, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  The flow path forming structure 1A of the second embodiment is mainly configured such that the first resin molded product 10A has a partition wall portion 13A and a groove-shaped third concave portion 14A, and the groove-shaped second concave portion of the second resin molded product 20A. 21A has a configuration in which both ends are closed, the fourth flow path 44A formed by the groove-shaped third recess 14A and the third resin molded product 30A, and the fourth flow path 44A connecting the fourth flow path 44A and the second flow path 42A. The configuration including the five flow paths 45A is different from the first embodiment.

  As described above, as a result of the different shapes of the first resin molded product 10A and the second resin molded product 20A, the first welding surface, the second welding surface, the first support surface, and the second support in the third resin molded product 30A. Although the positions of the surfaces and the like are different, these positions can be determined by a method similar to the method described in the first embodiment.

  The flow path forming structure 1A of the second embodiment can be manufactured by the same method as the flow path forming structure 1 of the first embodiment.

  According to the flow path forming structure 1A of the second embodiment, in addition to the effects of the flow path forming structure 1 of the first embodiment described above, there are the following effects.

  By providing the partition wall portion 13A, two flow paths (first flow path 41A and fourth flow path 44A) can be formed between the first resin molded product 10A and the third resin molded product 30A. When two flow paths are formed between the resin molded products in this way, the distance between the flow paths is narrowed compared to the case where a similar flow path forming structure is manufactured by forming only one flow path between the resin molded products. be able to. That is, in the present embodiment, the position of the first flow path 41A and the position of the fourth flow path 44A can be made closer. As a result, the flow path forming structure can be further downsized.

As mentioned above, although each preferred embodiment of the channel formation structure of the present invention and its manufacturing method was described, the present invention is not restricted to the embodiment mentioned above but can be carried out in various forms.
For example, in the first embodiment and the second embodiment, the groove-shaped recess is formed in the rectangular parallelepiped resin molded product, but the groove-shaped recess may be formed in the plate-shaped resin molded product. A groove-shaped recess may be formed in either the resin-shaped resin product or the plate-shaped resin molded product. That is, as shown in FIG. 8, the cross-sectional view of the flow direction of the fluid in the flow path may be either FIG. 8 (a) or (b).

  In the first embodiment and the second embodiment, each flow path formed between a rectangular parallelepiped resin molded product and a plate-shaped resin molded product, and the first surface and the second surface of the plate-shaped resin molded product. The flow path penetrating the surface is linear, but a bent flow path may be formed.

In the first embodiment and the second embodiment, a shut-off valve that can be opened and closed may be provided inside the flow path. An example in which a shutoff valve 23A that can be opened and closed is provided in the flow path forming structure 1A of the second embodiment will be described with reference to FIG. By providing a shut-off valve 23A that can be opened and closed as shown in FIG. 9A, the flow of fluid flowing through the flow path can be freely stopped.
Further, a lid portion that can be opened and closed is provided on the resin molded product, and the opening formed when the lid portion is opened may be connected to the flow path. By providing a lid and connecting a hose or the like to the lid, the fluid flowing in the flow path can be discharged to the outside, or another fluid can be joined to the fluid flowing in the flow path.
In particular, as shown in FIGS. 9B and 9C, the shutoff valve 23A is provided in the second flow path, and two openable and closable lid portions 24A are provided in the second resin molded product. You can change the flow pattern. More specifically, as shown in FIGS. 9B and 9C, the openable / closable lid portion 24A is connected to two spaces in the second flow path divided by the shutoff valve 23A, respectively. Provided. For example, by closing the shutoff valve 23A and opening the lid portion 24A, two communicating channels as shown in FIG. 9B can be formed in the channel forming structure. Further, by opening the shut-off valve 23A and closing the lid portion 24A, one communicating channel as shown in FIG. 9C can be formed in the channel forming structure.

DESCRIPTION OF SYMBOLS 1 Flow path formation structure 10 1st resin molded product 11 Groove-shaped 1st recessed part 12 1st welding planned end surface 20 2nd resin molded product 21 Grooved 2nd recessed part 22 2nd welding planned end surface 30 3rd resin molded product 31 1st surface 311 2nd support surface 32 2nd surface 321 1st support surface 40 Communication flow path 41 1st flow path 42 2nd flow path 43 3rd flow path 44 4th flow path

Claims (7)

A first resin molded product;
A second resin molded product;
A third resin molded product in which the first resin molded product is vibration welded on one surface and the second resin molded product is vibration welded on the other surface;
A first flow path formed between the first resin molded product and the third resin molded product;
A second flow path formed between the second resin molded product and the third resin molded product;
Formed in the third resin molded product, comprising a third flow path connecting the first flow path and the second flow path,
The first resin molded product and the second resin molded product are flow path forming structures having a projected area of 5 cm ² or more and 300 cm ² or less when viewed from a direction perpendicular to the welding surface. The third resin molded product is provided in at least a part of a position corresponding to a first welding surface which is a welding surface between the first resin molded product and the third resin molded product on the one surface, A first support surface substantially parallel to the welding surface;
The second surface is provided in at least a part of a position corresponding to the second welding surface, which is a welding surface between the second resin molded product and the third resin molded product, and is substantially parallel to the second welding surface. The flow path forming structure according to claim 1, further comprising two support surfaces. The first support surface is provided at a position corresponding to one end side of the first welding surface and a position corresponding to the other end side, respectively.
The flow path forming structure according to claim 2, wherein the second support surface is provided at a position corresponding to one end side of the second welding surface and a position corresponding to the other end side.   4. The flow path forming structure according to claim 1, wherein the first resin molded product and / or the third resin molded product is made of a light-impermeable resin material amount. 5.   The flow path forming structure according to any one of claims 1 to 4, wherein the resin molded product contains a polyphenylene sulfide-based resin as a main component. The first resin molded product has a partition wall,
A fourth flow path formed between the first resin molded product and the third resin molded product;
A fourth flow path connecting the fourth flow path and the second flow path; and
The flow path forming structure according to any one of claims 1 to 5, wherein the partition wall is provided so as to partition the first flow path and the fourth flow path. It is a manufacturing method of the channel formation structure according to any one of claims 1 to 6,
A first resin molded product arrangement step of arranging the first resin molded product on one surface of the third resin molded product;
A first flow path forming step of forming the first flow path by vibration welding the first resin molded article disposed on the one surface to the third resin molded article;
A second resin molded product arrangement step of arranging the second resin molded product on the other surface of the third resin molded product;
A second flow path forming step of forming the second flow path by vibration welding the second resin molded article disposed on the other surface to the third resin molded article. Production method.

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