JP6439556B2 - Heat exchanger tank and method of manufacturing heat exchanger tank - Google Patents

Description

  The present invention relates to a heat exchanger tank in which a heat medium flows, and a method for manufacturing the same.

  As a tank of this type of heat exchanger, there is a tank described in Patent Document 1. The tank described in Patent Literature 1 includes a tank body having a U-shaped cross section and a core plate that closes an opening of the tank body. The tank body has a flange on the outer edge of the opening. A seal member is integrally injection-molded on the bottom surface of the flange portion. Specifically, after the flange portion is inserted into the mold, the seal member material is injected into the mold through the injection port of the mold, so that the seal member is integrally formed on the bottom surface of the flange portion. The In the tank described in Patent Document 1, a seal member is disposed between the bottom surface of the flange portion and the core plate in a compressed state, thereby sealing between the core plate and the tank.

JP 2012-145237 A

  By the way, when the sealing member is integrally formed on the bottom surface of the flange portion using a mold by a manufacturing method as described in Patent Document 1, when the mold is removed from the flange portion, The excess part that hardens in the injection inlet remains. This extra portion is usually cut after injection molding of the seal member, but at this time, a part of the extra portion may remain on the seal member. Hereinafter, a part of the excess portion remaining on the seal member is referred to as “residue”. In this case, when the seal member is compressed between the flange portion and the core plate, the stress balance of the seal member may be uneven due to the residue of the seal member. If the stress balance of the seal member is not uniform, the surface pressure of the seal member is not stable, and the sealing performance between the tank body and the core plate may be reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heat exchanger tank capable of improving the sealing performance between the tank body and the core plate, and a method for manufacturing the same. There is.

In order to solve the above problems, the tank (3) of the heat exchanger (1) through which the heat medium flows includes a tank body (31), a core plate (30), and a seal member (34). The tank body has an opening (310) and a flange (311) on the outer edge of the opening. The core plate closes the opening of the tank body and has an insertion portion (301) into which the flange portion of the tank body is inserted. The seal member is integrally formed with the flange portion of the tank body, and seals between the flange portion of the tank body and the core plate. The seal member includes a seal body portion (340) provided on the bottom surface (311b) of the flange portion, and an extending portion (341) extending from the seal body portion along the outer peripheral side surface (311c) of the flange portion. A cut surface (341b) of the seal member is formed in the extending portion. On the outer peripheral side surface of the flange portion, a groove portion (316) extending from the bottom surface of the flange portion is formed. The extending part of the seal member is formed in the groove part.

In addition, the manufacturing method of the tank (3) of the heat exchanger (1) includes an assembling process of assembling the flange portion to the mold (5), and a material for the seal member through the injection inlet (53) of the mold. An injection step of integrally molding a seal member on the bottom surface of the flange portion by injecting from the outer peripheral side surface of the portion. On the outer peripheral side surface of the flange portion, a groove portion (316) extending from the bottom surface of the flange portion is formed. The injection inlet of the mold is provided at a position corresponding to the groove. The width of the injection inlet of the mold in the circumferential direction of the flange portion is set to be equal to or smaller than the width of the groove portion in the circumferential direction of the flange portion.

  According to the above configuration and manufacturing method, since the cut surface is formed in the extending portion of the seal member extending on the outer peripheral side surface of the flange portion, there is no residue in the seal body portion. Therefore, when the space between the tank body and the core plate is sealed by the seal body, the surface pressure of the seal body does not become unstable due to the residue. Therefore, the sealing performance between the tank body and the core plate can be improved.

  According to the present invention, the sealing performance between the tank body and the core plate can be improved.

It is a perspective view which shows schematic structure of a heat exchanger. It is sectional drawing which shows the cross-section along the II-II line | wire of FIG. It is a front view which shows the front structure of the tank main body about one Embodiment of the tank of a heat exchanger. It is a bottom view which shows the bottom face structure of the tank main body of embodiment. It is a side view which shows the side structure of the tank main body of embodiment. It is sectional drawing which shows the cross-section around the flange part of the tank main body about the tank of the heat exchanger of embodiment, and is a principal part enlarged view of FIG. It is sectional drawing which expands and shows the principal part of the cross-sectional structure along VII-VII of FIG. It is sectional drawing which shows the cross-section around the flange part of the metal mold | die and a tank main body about the manufacturing method of the tank of the heat exchanger of embodiment. It is a front view which shows the front structure of the injection inlet of the metal mold | die about the manufacturing method of the tank of the heat exchanger of embodiment, and an injection outlet periphery. FIG. 10 is a cross-sectional view showing a cross-sectional structure along the line XX in FIG. 9. (A)-(C) are figures which show typically the flow of a rubber material about the manufacturing method of the tank of the heat exchanger of embodiment. It is sectional drawing which shows the cross-section of the flange part periphery of the tank main body removed from the metal mold | die about the manufacturing method of the tank of the heat exchanger of embodiment. It is a front view which shows the front structure of the extending | stretching part of the sealing member about the manufacturing method of the tank of the heat exchanger of embodiment. It is sectional drawing which shows the cross-sectional structure of the flange part periphery of the tank main body about other embodiment of the tank of a heat exchanger.

  Hereinafter, an embodiment of a heat exchanger tank and a method for manufacturing the same will be described. First, the outline of the heat exchanger will be described. A heat exchanger 1 shown in FIG. 1 is used as a vehicle heat exchanger that cools a heat medium by performing heat exchange between the heat medium and air using, for example, cooling water of an internal combustion engine as a heat medium. It is.

  As shown in FIG. 1, the heat exchanger 1 includes a core portion 2, a pair of tanks 3 and 3, and a pair of side plates 4 and 4.

  The core portion 2 is constituted by the tubes 20 and the fins 21. A plurality of tubes 20 are stacked with a gap in the direction indicated by arrow A. The tube 20 is a flat tube having a longitudinal direction B in a direction orthogonal to the stacking direction A. Inside the tube 20, a flow path through which the heat medium flows is formed along the longitudinal direction B. Between the adjacent tubes 20, 20, air flows in a direction perpendicular to both the tube stacking direction A and the tube longitudinal direction B, that is, a direction parallel to the direction indicated by the arrow C in the drawing. The fin 21 is disposed between the tubes 20 and 20 adjacent to each other in the stacking direction A. The fins 21 are so-called corrugated fins formed by bending a thin metal plate. The fins 21 are joined to the side surfaces of the tubes 20 and 20 adjacent to each other in the stacking direction A by brazing. The fin 21 has a function of promoting heat exchange between the heat medium flowing in the tube 20 and the air by increasing a contact area with the air flowing between the tubes 20 and 20.

  The pair of tanks 3 and 3 are provided at both ends of the core portion 2 in the tube longitudinal direction B, respectively. The pair of tanks 3 and 3 are formed so as to extend in the tube stacking direction A, and are connected to both ends of each tube 20 in the longitudinal direction B. Hereinafter, the direction indicated by the arrow A is also referred to as “tank longitudinal direction”. The tank 3 includes a core plate 30 connected to the end of the tube 20, and a tank body 31 that forms an internal flow path of the tank 3 together with the core plate 30. The internal flow path of the tank 3 communicates with the internal flow path of the tube 20. One tank 3 is provided with an inlet 32. The inflow port 32 is a portion that supplies a heat medium into the internal flow path of one tank 3 as indicated by an arrow in the drawing. The other tank 3 is provided with an outlet 33. The outflow port 33 is a part for discharging the heat medium from the inside flow path of the other tank 3 as indicated by an arrow in the drawing.

  The pair of side plates 4 and 4 are disposed at both ends of the core portion 2 in the tube stacking direction A, respectively. The pair of side plates 4, 4 are formed so as to extend in the tube longitudinal direction B, and are connected to the pair of tanks 3, 3. The pair of side plates 4, 4 has a function of reinforcing the core portion 2.

  In the heat exchanger 1, the heat medium supplied from the inlet 32 of one tank 3 flows into the tube 20 through the internal flow path of the tank 3. The heat medium is cooled by heat exchange between the heat medium flowing inside the tube 20 and the air flowing outside the tube 20. The heat medium cooled by passing through the inside of the tube 20 is discharged from the outflow port 33 through the internal flow path of the other tank 3.

Next, the structure of the tank 3 will be described in detail.
As shown in FIG. 2, the tank body 31 has a U-shaped cross section perpendicular to the tank longitudinal direction A. The tank body 31 is formed of a resin member such as glass reinforced polyamide reinforced with glass fiber, for example. As shown in FIGS. 3 and 4, both ends of the tank body 31 in the tank longitudinal direction A are closed. As shown in FIG. 4, a rectangular annular opening 310 is formed in the tank body 31.

  As shown in FIGS. 3 to 5, a flange portion 311 is formed on the outer edge of the opening 310 of the tank body 31 over the entire circumference. That is, the flange portion 311 is also formed in a rectangular ring shape. The flange portion 311 has long wall portions 312 and 313 parallel to the tank longitudinal direction A and short wall portions 314 and 315 parallel to the air flow direction C.

  As shown in FIG. 2, a seal member 34 is integrally formed on the bottom surface 311 b of the flange portion 311. As shown in FIGS. 3 to 5, the seal member 34 is provided over the entire circumference of the flange portion 311. The seal member 34 is made of rubber, for example.

  As shown in FIG. 2, the core plate 30 includes a plate-like tube joint portion 300 extending in the tank longitudinal direction A, and an annular insertion portion 301 formed on the outer periphery of the tube joint portion 300 over the entire circumference. Have. The core plate 30 is made of, for example, an aluminum alloy.

  The tube joint portion 300 is disposed so as to close the opening 310 of the tank body 31. A plurality of tube insertion holes (not shown) into which the tubes 20 are inserted are formed in the core plate 30 along the tank longitudinal direction A. The tube 20 is fixed to the core plate 30 by brazing.

  The flange portion 311 of the tank body 31 is inserted into the insertion portion 301. The insertion part 301 has an inner wall part 301a, a bottom wall part 301b, and an outer wall part 301c.

  The inner wall portion 301 a is a portion that is bent at a substantially right angle toward the direction in which the outer peripheral portion of the tube joint portion 300 approaches the core portion 2. The inner wall portion 301 a extends in parallel to the inner peripheral side surface 311 a of the flange portion 311.

  The bottom wall portion 301b is a portion that is bent at a substantially right angle with the lower end portion of the inner wall portion 301a facing outward. The bottom wall portion 301 b is disposed to face the bottom surface 311 b of the flange portion 311. The gap between the flange portion 311 of the tank body 31 and the core plate 30 is sealed by the seal member 34 integrally formed with the bottom wall portion 301b.

  The outer wall portion 301 c is a portion that is bent at a substantially right angle toward the direction of separating the outer peripheral portion of the bottom wall portion 301 b from the core portion 2. The outer wall portion 301 c is disposed so as to face the outer peripheral side surface 311 c of the flange portion 311. A plurality of protruding pieces 301d are formed on the upper end portion of the outer wall portion 301c. The protruding piece 301d is bent so as to be pressed against the upper surface 311d of the flange portion 311. As a result, the core plate 30 is caulked and fixed to the tank body 31.

Next, the structure of the seal member 34 will be described in detail.
As shown in FIG. 3, a concave groove 316 is formed at the center of the long wall portion 312 of the flange portion 311. Although not shown, a similar concave groove 316 is also formed in the central portion of the long wall portion 313 of the flange portion 311. As shown in FIG. 5, a concave groove 316 is also formed at the center of the short wall portion 314 of the flange portion 311. Although not shown, a similar concave groove 316 is also formed in the central portion of the short wall portion 314 of the flange portion 311.

  As shown in FIG. 6, the groove portion 316 extends from the bottom surface 311 b of the flange portion 311 toward the corner portion on the upper surface 311 d side. A step surface 311 g is formed between the upper end portion of the groove portion 316 and the corner portion of the flange portion 311.

  In the portion where the groove portion 316 is formed, the seal member 34 includes a seal main body portion 340 provided on the bottom surface 311 b of the flange portion 311 and an extending portion 341 extending from the seal main body portion 340 along the groove portion 316. In the circumferential direction, the extending portion 341 has a width H3 that is smaller than the width H2 of the groove portion 316.

  Although not shown, the seal portion 340 has a hemispherical cross-sectional shape protruding from the bottom surface 311b of the flange portion 311 toward the bottom wall portion 301b. As shown in FIGS. 6 and 7, the seal main body 340 is compressed between the flange 311 of the tank main body 31 and the core plate 30, thereby sealing the space therebetween.

Next, a method for manufacturing the tank 3 will be described.
When manufacturing the tank 3, first, the tank body 31 is formed by resin molding such as injection molding. Thereafter, as shown in FIG. 8, an assembling step for assembling the flange portion 311 of the tank body 31 to the mold 5 is performed. A cavity 50 having the same shape as the outer shape of the seal member 34 is formed in the mold 5. That is, the cavity 50 includes a first cavity 51 having a shape corresponding to the seal main body 340 of the seal member 34 and a second cavity 52 having a shape corresponding to the extending portion 341 of the seal member 34. The second cavity 52 has a shape corresponding to the groove portion 316 of the flange portion 311 of the tank body 31.

  In the mold 5, injection inlets 53 are formed at positions corresponding to the respective groove portions 316 of the long wall portions 312 and 313 of the flange portion 311. The mold 5 is formed with injection outlets 54 at positions corresponding to the respective groove portions 316 of the short wall portions 314 and 315 of the flange portion 311. The injection inlet 53 and the injection outlet 54 are formed so as to penetrate the second cavity 52 from the outer surface of the mold 5. As shown in FIGS. 9 and 10, the width H1 of each of the injection inlet 53 and the injection outlet 54 in the circumferential direction of the flange portion 311 is set to be smaller than the width H2 of the groove portion 316 in the circumferential direction of the flange portion 311. ing.

  As shown in FIG. 8, after the flange portion 311 of the tank body 31 is assembled to the mold 5, the upper surface 311 d of the flange portion 311 is pressed by the mold 6. Thereafter, as indicated by an arrow D in FIG. 4, a rubber material, which is a material of the seal member 34, is injected from the injection inlet 53 of the mold 5 corresponding to the respective groove portions 316 of the long wall portions 312 and 313 of the flange portion 311. An injection process is performed. As a result, the rubber material flows from the second cavity 52 shown in FIG. 8 to the first cavity 51. As indicated by arrows E1 and E2 in FIG. 4, the rubber flowing into the first cavity 51 branches from the groove portion 316 of the flange portion 311 to the left and right and flows to the short wall portions 314 and 315 of the flange portion 311. . This rubber material flows as shown by point hatching in FIGS.

  That is, as indicated by arrows in FIGS. 11A and 11B, a rubber material that flows from one long wall portion 312 to the short wall portion 314 and a rubber material that flows from the other long wall portion 313 to the short wall portion 314. The material joins in the vicinity of the groove portion 316 of the short wall portion 314. Similarly, the rubber material also merges in the vicinity of the groove portion 316 of the other short wall portion 315. As shown in FIG. 11C, the joining portion (weld) W of the rubber material is pushed out of the mold 5 from the groove portion 316 of the short wall portion 314 through the injection outlet 54 of the mold 5.

  After the rubber material is filled into the cavity 50 of the mold 5 through the above steps, the rubber material is cooled and cured. Thereafter, after the tank body 31 is taken out from the mold 5, the rubber material is cut at a position indicated by a broken line L in FIG. This eliminates excess portions of the rubber material that hardens within the injection inlet 53 and the injection outlet 54. Therefore, as shown by dot hatching in FIG. 13, a cut surface 341 b is formed in the extending portion 341 of the seal member 34. The width H3 of the cut surface 341b in the circumferential direction of the flange portion 311 is substantially the same as the width H1 of each of the injection inlet 53 and the injection outlet. That is, the width H3 of the cut surface 341b in the circumferential direction of the flange portion 311 is set smaller than the width H2 of the groove portion 316 in the circumferential direction of the flange portion 311.

  Thereafter, after the flange portion 311 and the seal member 34 of the tank body 31 are inserted into the insertion portion 301 of the core plate 30, the protruding piece 301 d of the core plate 30 is bent so as to be pressed against the upper surface 311 d of the flange portion 311. Thereby, the core plate 30 is caulked and fixed to the tank main body 31, and the manufacture of the tank 3 is completed.

  According to the tank 3 of this embodiment demonstrated above, the effect | action and effect shown by the following (1)-(4) can be acquired.

  (1) Since the cut surface 341b is formed in the extending portion 341 of the seal member 34 extending from the bottom surface 311b of the flange portion 311 to the outer peripheral side surface 311c, there is no residue in the seal main body portion 340. Therefore, when sealing between the flange part 311 of the tank main body 31 and the core plate 30 with the seal main-body part 340, the fall of the sealing performance resulting from a residue can be avoided. Therefore, the sealing performance between the flange portion 311 of the tank body 31 and the core plate 30 can be improved.

  (2) Since the extending portion 341 of the seal member 34 is formed in the groove portion 316 formed on the outer peripheral side surface 311c of the flange portion 311, the amount of protrusion of the seal member 34 from the outer peripheral side surface 311c of the flange portion 311 is reduced. Can do. Thereby, when the tank main body 31 is assembled to the core plate 30, the extending portion 341 of the seal member 34 is difficult to contact the core plate 30, and thus the seal member 34 is difficult to peel off. Therefore, it is possible to suppress the generation of foreign matters due to the peeling of the seal member 34.

  (3) The width H1 of each of the injection inlet 53 and the injection outlet 54 in the circumferential direction of the flange portion 311 is smaller than the width H2 of the groove portion 316 in the circumferential direction of the flange portion 311. Thereby, even if the corner portion connecting the outer peripheral side surface 311c and the wall surface 316a of the groove portion 316 has an R shape and a gap is formed between the corner portion and the mold 5, the periphery of the flange portion 311 from the groove portion 316 is obtained. Since the seal member 34 can be prevented from protruding in the direction, the generation of foreign matters can be suppressed. The width H1 of each of the injection inlet 53 and the injection outlet 54 is substantially the same as the width H3 of the cut surface 341b of the seal member 34. Therefore, if it is confirmed whether or not the width H3 of the cut surface 341b of the seal member 34 is smaller than the width H2 of the groove 316, the width H1 of each of the injection inlet 53 and the injection outlet 54 is smaller than the width H2 of the groove 316. It is possible to determine whether or not.

  (4) Since the injection outlet 54 of the mold 5 is provided at a position corresponding to the joining position of the rubber material, the joining portion W of the rubber material is discharged to the outside of the mold 5 through the injection outlet 54. Can do. As a result, the merged portion W of the rubber material having unstable physical properties is unlikely to remain on the seal member 34, so that the physical properties of the seal member 34 are stabilized. Therefore, sealing performance can be ensured.

In addition, the said embodiment can also be implemented with the following forms.
The width H1 of each of the injection inlet 53 and the injection outlet 54 in the circumferential direction of the flange portion 311 may be set equal to the width H2 of the groove portion 316 in the circumferential direction of the flange portion 311. That is, the width H3 of the cut surface 341b in the circumferential direction of the flange portion 311 may be set equal to the width H2 of the groove portion 316 in the circumferential direction of the flange portion 311.

-The shape of the groove part 316 of the flange part 311 is not restricted concavely, and can be changed suitably.
The mold 5 may not be provided with the injection outlet 54. In this case, the groove portion 316 can be excluded from the short wall portions 314 and 315 of the flange portion 311. Therefore, the extending portion 341 of the seal member 34 is formed only at the center of each of the long wall portions 312 and 313 of the flange portion 311.

  -The number of each of the injection inlet 53 of the metal mold | die 5 and the injection outlet 54 can be changed suitably. For example, one injection inlet 53 and one injection outlet 54 may be provided.

  The positions of the injection inlet 53 and the injection outlet 54 of the mold 5 can be changed as appropriate. For example, the position of the injection inlet 53 and the position of the injection outlet 54 may be reversed. Further, the positions of the groove portions 316 of the flange portion 311 may be changed as appropriate in accordance with the change of the respective positions of the injection inlet 53 and the injection outlet 54 of the mold 5.

  The width H1 of the injection inlet 53 and the injection outlet 54 of the mold 5 may be substantially the same as the width H2 of the groove 316.

  As shown in FIG. 14, the groove portions 316 may not be formed in the long wall portions 312 and 313 and the short wall portions 314 and 315 of the flange portion 311. In this case, when the tank 3 is manufactured, the rubber material may be injected and discharged from the outer peripheral side surface 311c of the flange portion 311. Even in such a manufacturing method, the seal member 34 is formed with the extending portion 341 extending from the seal main body portion 340 along the outer peripheral side surface 311c of the flange portion 311. Further, a cut surface 341 b of the seal member 34 is formed in the extending portion 341. Therefore, it is possible to obtain the operation and effect of the above (1).

  -This invention is not limited to said specific example. That is, the above-described specific examples that are appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, and can be changed as appropriate. Moreover, each element with which embodiment mentioned above is provided can be combined as long as it is technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

1: Heat exchanger 3: Tank 30: Core plate 301: Insertion part 31: Tank body 310: Opening part 311: Flange part 311b: Bottom surface 311c: Outer peripheral side surface 316: Groove part 34: Seal member 340: Seal body part 341: Extension Part 341b: cut surface 5: mold 53: injection inlet 54: injection outlet

Claims (6)

A tank (3) of a heat exchanger (1) through which a heat medium flows,
A tank body (31) having an opening (310) and having a flange (311) on an outer edge of the opening;
A core plate (30) having an insertion portion (301) into which the flange portion of the tank main body is inserted while closing the opening of the tank main body;
A seal member (34) that is integrally formed with the flange portion of the tank body and seals between the flange portion of the tank body and the core plate;
The sealing member is
A seal body (340) provided on the bottom surface (311b) of the flange,
An extending portion (341) extending from the seal main body portion along the outer peripheral side surface (311c) of the flange portion,
The extending portion is formed with a cut surface (341b) of the seal member ,
On the outer peripheral side surface of the flange portion, a groove portion (316) extending from the bottom surface of the flange portion is formed,
2. The heat exchanger tank according to claim 1, wherein the extending portion of the sealing member is formed in the groove . In the tank of the heat exchanger according to claim 1 ,
The width of the cut surface in the circumferential direction of the flange portion is equal to or less than the width of the groove portion in the circumferential direction of the flange portion. A tank body (31) having an opening (310) and having a flange (311) on an outer edge of the opening;
A core plate (30) having an insertion portion (301) into which the flange portion of the tank main body is inserted while closing the opening of the tank main body;
Production of a tank (3) of a heat exchanger (1) comprising: a seal member (34) integrally formed on the flange portion of the tank body and sealing between the flange portion of the tank body and the core plate. A method,
An assembling step for assembling the flange portion to the mold (5);
Injection that integrally molds the seal member on the bottom surface (311b) of the flange portion by injecting the material of the seal member from the outer peripheral side surface (311c) of the flange portion through the injection inlet (53) of the mold. A process ,
On the outer peripheral side surface of the flange portion, a groove portion (316) extending from the bottom surface of the flange portion is formed,
An injection inlet of the mold is provided at a position corresponding to the groove,
The method of manufacturing a tank of a heat exchanger , wherein a width of the injection inlet of the mold in the circumferential direction of the flange portion is set to be equal to or less than a width of the groove portion in the circumferential direction of the flange portion . In the manufacturing method of the tank of the heat exchanger of Claim 3 ,
In the injection step, the material of the sealing member filled in the mold is discharged from the outer peripheral side surface of the flange portion via the injection outlet (54) of the mold. Manufacturing method. In the manufacturing method of the tank of the heat exchanger of Claim 4 ,
On the outer peripheral side surface of the flange portion, a groove portion (316) extending from the bottom surface of the flange portion is formed,
The injection outlet of the mold is provided at a position corresponding to the groove portion,
The method of manufacturing a tank of a heat exchanger, wherein a width of an injection outlet of the mold in a circumferential direction of the flange portion is set to be equal to or less than a width of the groove portion in the circumferential direction of the flange portion. In the manufacturing method of the tank of the heat exchanger of Claim 4 ,
The method for producing a tank of a heat exchanger, wherein the injection outlet of the mold is provided at a position corresponding to a joining position of materials of the seal member injected from the injection inlet.

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