JP2018103485A - Resin part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin part capable of suppressing occurrence of weld burr while maintaining welding strength with a resin member and an other resin member.SOLUTION: A recess portion 34 is formed on a member 16 side, a recess portion 42 is formed on a member 14 side, and the recess portion 34 and the recess portion 42 constitute a space portion 44. The space portion 44 is provided with a jaw part 46 on the member 16 side. The molten resin protruding in a welded portion 26 of the member 14 and the member 16 is guided to the side of the recess portion 42 by the jaw part 46 and then to the side of the recess portion 34. In the member 14, the molten resin, in which a protruding piece 36 is formed toward the recess portion 34 and is guided toward the recess portion 34, flows into a gap 38 formed between the projecting piece 36 and the side wall 34 A of the recess portion 34 adjacent to the recess portion 42, and is blocked by the projecting piece 36.EFFECT: Since a welding faces 20A and 24A are welded to each other without forming welding ribs, occurrence of weld burr which protrude toward a hollow portion 32 side can be suppressed while maintaining a welding strength at the welded portion 26.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a resin component.

  In Patent Document 1 below, in resin parts that are welded to each other by vibration welding, welding ribs are respectively formed on one resin member and the other resin member, and these welding ribs are brought into contact with each other, and welding ribs are formed by vibration welding. A technique for fusing and bonding (welding) the surfaces of these is disclosed. Further, in this prior art, an inner burr pool and an outer burr pool are respectively provided on the inner side and the outer side of the welding rib in the resin component, and at the time of vibration welding, the melted molten member is placed in the inner burr pool and the outer burr pool. This prevents entry of welding burrs inside and outside the resin parts.

JP 2012-219765 A

  However, in the above prior art, in order to increase the welding strength in one resin member and the other resin member, it is necessary to increase the volume of the inner burr pool and the outer burr pool as a result. The welded part will become larger.

  In view of the above facts, the present invention provides a resin component capable of effectively suppressing the occurrence of welding burrs while maintaining the welding strength at the welding portion of one resin member and the other resin member. With the goal.

  The resin component according to claim 1 is a first resin member, a second resin member that is welded to the first resin member and a welding portion, and forms a hollow portion with the first resin member, and the welding portion. In the 1st welding surface by the side of the 1st resin member, the 1st hollow part which was formed facing the hollow part, and was constituted including the side wall connected with the 1st welding surface, and the 2nd in the welding part A projecting portion that extends from the second welding surface on the resin member side so as to face the hollow portion, and that is formed toward the first recess portion in a state where a gap is provided between the second side surface and the side wall; In the welding surface, a second depression that is provided adjacent to the protrusion and communicates with the first depression and exposes the side wall of the first welding surface to form a jaw, and the second depression Provided between the first welding surface and the second welding surface. Melting member has a a vitrified portion which is solidified is flowed that.

  The resin component according to claim 1 includes a first resin member and a second resin member, wherein the first resin member and the second resin member are welded at a weld portion, and the first resin member and the second resin member are The hollow part is formed. Moreover, the 1st hollow part is provided in the 1st welding surface by the side of the 1st resin member in a welding part. This 1st hollow part is formed facing the hollow part, and is comprised including the side wall connected with a 1st welding surface.

  On the other hand, from the 2nd welding surface by the side of the 2nd resin member in a welding part, the protrusion part is extended facing the hollow part. The protruding portion is formed toward the first dent portion with a gap between the first dent portion and the side wall. Furthermore, the 2nd hollow part connected to a 1st hollow part adjacent to a protrusion part is formed in the 2nd welding surface. By this second depression, the side wall side of the first depression on the first welding surface is exposed to form a jaw. Here, the “jaw” means a portion that protrudes into the space formed by the first recess and the second recess and exposes the welding surface.

  And the melt-solidification part is provided in the clearance gap between a 2nd hollow part and a 1st hollow part. The melt-solidified portion is a portion in which a melted member melted between the first welding surface and the second welding surface is flowed and solidified. That is, since a gap is provided between the side wall of the first dent portion and the protruding portion in the first dent portion, when the first resin member and the second resin member are welded, The melted molten member will flow into the gap of the recess.

  Here, a second depression is formed in the second resin member so that the side wall of the first depression on the first welding surface is exposed to form a jaw. For this reason, the molten member made up of the first resin member and the second resin member is inhibited from flowing into the first recess portion by the jaw portion, and is first guided (inflow) to the second recess portion side.

  And next, the melting member will flow into the gap of the first recess, but since the protrusion is formed facing the hollow portion, the melting member that has flowed into the first recess is: It is dammed by the protruding portion, and the flow to the hollow portion side is restricted. Thereby, generation | occurrence | production of the welding burr | flash which protrudes toward a hollow part side can be suppressed in the welding part of a 1st resin member and a 2nd resin member.

  As described above, the resin component according to claim 1 can effectively suppress the occurrence of welding burrs while maintaining the welding strength at the welding portion of one resin member and the other resin member. , Has an excellent effect.

It is a perspective view which shows the resin member which concerns on this Embodiment. (A) is a partially enlarged cross-sectional perspective view showing a state when a part of the resin member before welding in FIG. 1 is enlarged and cut along line 2 (A) -2 (A) in FIG. (B) is a partially enlarged sectional view of (A). (A) is a partially enlarged cross-sectional perspective view showing a state when a part of the resin member after welding in FIG. 1 is enlarged and cut along line 2 (A) -2 (A) in FIG. (B) is a partially enlarged sectional view of (A).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Configuration of resin parts)

First, the structure of the resin component which concerns on this Embodiment is demonstrated.
FIG. 1 shows a surge tank 10 to which the resin component according to the present embodiment is applied. In general, although not shown, the surge tank is a space for storing the air that has passed through the air cleaner. The surge tank is connected to an intake manifold provided in the engine and a throttle body in which the throttle is provided. It has come to be.

  As shown in FIG. 1, the surge tank 10 has a substantially rectangular shape in a plan view, and an upper member (second resin member) 14 to which the throttle body 12 is connected and an intake manifold (not shown) are connected. And a lower member (first resin member) 16. The upper member 14 and the lower member 16 are formed of, for example, a carbon fiber reinforced thermoplastic resin material (hereinafter referred to as “CFRP”) containing carbon fibers as a fiber reinforced thermoplastic resin. In addition, as a reinforced fiber, a continuous fiber can be applied, for example, and a long fiber and a short fiber can also be applied. The upper member 14 and the lower member 16 are not necessarily required to contain reinforcing fibers in the thermoplastic resin.

  2A shows a state before the upper member 14 and the lower member 16 are welded in the surge tank 10, and a part of FIG. 1 is enlarged, and FIG. A partially enlarged cross-sectional perspective view when cut along line A) -2 (A) is shown. 2B is an enlarged view of a part of FIG. 2A. In FIG. 2B, FIG. 2A is viewed from the front in consideration of easy understanding. A partially enlarged sectional view is shown as a sectional view. 3A and 3B show a state after the upper member 14 and the lower member 16 are welded, and FIGS. 2A, 2B, 3A, (B) is a figure corresponding to each other before and after welding.

  As shown in FIGS. 2 (A) and 2 (B), the main body portion 18 of the upper member 14 has a central portion in the width direction orthogonal to the longitudinal direction and extends upward over substantially the entire region in the longitudinal direction. The flange portion 20 protrudes from the outer edge 18 </ b> A of the main body portion 18 toward the outside of the main body portion 18. In addition, as with the main body portion 18 of the upper member 14, the main body portion 22 of the lower member 16 also swells downward in the widthwise central portion orthogonal to the longitudinal direction over substantially the entire longitudinal direction. The flange portion 24 protrudes from the outer edge 22 </ b> A of the main body portion 22 toward the outside of the main body portion 22. Then, the flange portion 20 of the upper member 14 and the flange portion 24 of the lower member 16 are welded to each other by vibration welding, ultrasonic welding, or the like (welding portion 26 (see FIGS. 3A and 3B)).

  As shown in FIGS. 3A and 3B, here, the welded portion 26 includes a welded surface 20A of the flange portion 20 of the upper member 14 and a welded surface 24A of the flange portion 24 of the lower member 16 described later. Are formed in a straight line. However, in reality, the resin material of the upper member 14 and the lower member 16 is mixed between the welding surface 20A side and the welding surface 24A side, so the welding portion 26 does not become linear.

  Then, by welding the flange portion 20 of the upper member 14 and the flange portion 24 of the lower member 16, the upper member 14 and the lower member 16 are integrated, and the inner wall surface 28 of the upper member 14 and the inner portion of the lower member 16 are integrated. A hollow portion 32 is formed with the wall surface 30. Air that has passed through an air cleaner (not shown) is stored in the hollow portion 32.

  Here, in this embodiment, as shown in FIGS. 2A and 2B, the welding surface 20 </ b> A of the flange portion 24 on the lower member 16 side faces the hollow portion 32 and is a recessed portion (first portion). A depression 34) is formed. The recess 34 is substantially L-shaped when viewed from the front, and includes a side wall 34A and a bottom wall 34B. The side wall 34A is connected to the welding surface 20A, and the bottom wall 34B is an inner wall surface forming the hollow portion 32. 30 is connected.

  On the other hand, a protruding piece (protruding portion) 36 is formed on the flange portion 20 on the upper member 14 side so as to face the hollow portion 32 from the inner wall surface 28. The protruding piece 36 extends in a direction substantially perpendicular to the welding surface 24A toward the recess 34 beyond the welding surface 24A. The projecting piece 36 is formed with a gap 38 between the side wall 34A constituting the recess 34 of the lower member 16 (horizontal direction in the figure) and between the bottom wall 34B (up and down direction in the figure). ) Is provided with a gap 40.

  Further, a substantially arc-shaped depression (second depression) 42 is provided adjacent to the protruding piece 36 on the welding surface 20A of the flange portion 20 on the upper member 14 side. The recessed portion 42 communicates with a recessed portion 34 formed on the lower member 16 side, and has a shape that swells to the outer edge portion 20B side of the flange portion 20 from the recessed portion 34.

  Thereby, in the welding surface 24A of the lower member 16, the side wall 34A side that constitutes the recessed portion 34 is exposed, and the protruding jaw portion 46 is provided in the space portion 44 configured by the recessed portion 34 and the recessed portion 42. It becomes. In the case of vibration welding, the depth dimension L of the jaw 46 is set to be approximately twice the amplitude of vibration, for example.

  Further, a recess 48 is formed at a substantially central portion in the projecting direction of the flange portion 20 of the upper member 14. The recess 48 has a substantially semicircular cross section cut along the protruding direction of the flange 20, and is formed so as to surround the hollow portion 32.

  Further, a recessed portion 50 that communicates with the recessed portion 48 is formed at a substantially central portion in the projecting direction of the flange portion 24 of the lower member 16. The recess 50 has a substantially rectangular cross-sectional shape cut along the projecting direction of the flange portion 20, and is formed so as to surround the hollow portion 32 like the upper member 14.

  In the present embodiment, the recessed portion 50 is formed so as to have a larger volume than the recessed portion 48. The center position of the length along the horizontal direction in the figure in the depression 48 and the center position of the length along the horizontal direction in the figure in the depression 50 substantially coincide with each other, and the depression 48 and the depression 50 Jaw portions 54 and 56 are formed in the configured space portion 52. Due to the formation of the jaw portions 54 and 56, a part of the welding surface 20A on the upper member 14 side is exposed.

  Further, no depression is formed outside the depression 48 in the protruding direction of the flange portion 20 of the upper member 14. Further, in the lower member 16, similarly to the upper member 14, no recessed portion is formed outside the recessed portion 50 in the protruding direction of the flange portion 24.

  In the present embodiment, the total volume of the recessed portion 42 and the gap 38, which are part of the space portion 44, and the space portion 52 is determined from the area of the welded portion 26 of the upper member 14 and the lower member 16 and the amount submerged by the welding. It is set to be equal to or greater than the calculated total volume.

(Operation and effect of resin parts)
Next, functions and effects of the resin component according to the present embodiment will be described.

  As shown in FIGS. 2A and 2B, frictional heat generated by vibration when the upper member 14 and the lower member 16 of the surge tank 10 to which the resin component according to the present embodiment is applied is welded to each other. As a result, the resin member forming the upper member 14 and the lower member 16 is melted between the welding surface 20A of the flange portion 20 of the upper member 14 and the welding surface 24A of the flange portion 24 of the lower member 16 (melting member).

  Here, when the upper member 14 and the lower member 16 include reinforcing fibers, although not illustrated, the reinforcing fibers on the upper member 14 side and the reinforcing fibers on the lower member 16 side are entangled with each other. The welding strength due to the welding of the upper member 14 and the lower member 16 is increased.

  Further, the molten resin melts between the welding surface 20A of the flange portion 20 of the upper member 14 and the welding surface 24A of the flange portion 24 of the lower member 16, so that the flange portion 20 of the upper member 14 and the flange of the lower member 16 The portions 24 are welded to each other (welded portion 26). On the other hand, although not shown, in general, so-called welding burrs are generated at the edge of the welding portion 26. That is, the weld burr is a solidified molten resin that protrudes from the edge of the weld portion 26.

  In this embodiment, as shown in FIGS. 2A and 2B, a recess 34 is formed on the welding surface 20A of the flange 24 on the lower member 16 side. Further, a recessed portion 42 communicating with the recessed portion 34 is formed on the welding surface 20A of the flange portion 20 on the upper member 14 side, and the recessed portion 34 and the recessed portion 42 form a space portion 44. Further, the space portion 44 is provided with a jaw portion 46 that exposes the welding surface 24A of the lower member 16 at the flange portion 24 on the lower member 16 side.

  With the above-described configuration, the molten resin that protrudes from the welded portion 26 of the upper member 14 and the lower member 16 flows into the space 44 along the welded surface 24A of the lower member 16 (so-called burr pool). At this time, the molten resin is prevented from flowing into the depression 34 by the jaw 46 provided in the space 44, and is first guided to the depression 42 (arrow A). And after guiding to the hollow part 42 side, molten resin is guided to the hollow part 34 side (arrow B).

  In other words, the flow direction of the molten resin can be controlled by providing the jaw 46 in the space 44. Here, the molten resin flows from the recess 42 on the upper member 14 side to the recess 34 on the lower member 16 side. For this reason, the reinforcing fibers in the molten resin are oriented from the upper member 14 side to the lower member 16 side. Thereby, the welding strength by welding with the upper member 14 and the lower member 16 can further be improved.

  By the way, as described above, in the flange portion 20 of the upper member 14, the protruding piece 36 extends from the inner wall surface 28 of the upper member 14 adjacent to the recessed portion 42. And this protrusion piece 36 is formed toward the hollow part 34, and the clearance gap 38 is provided between the side walls 34A of the hollow part 34. As shown in FIG.

  Therefore, as described above, the molten resin (indicated by the arrow B) guided to the depression 34 side flows into the gap 38. At this time, since the projecting piece 36 is provided in the hollow portion 34, the molten resin that has flowed into the gap 38 is blocked by the projecting piece 36 and the flow toward the hollow portion 32 is restricted. As a result, as shown in FIGS. 3A and 3B, it is possible to suppress the occurrence of weld burrs that protrude toward the hollow portion 32 in the weld portions 26 of the upper member 14 and the lower member 16. .

  In addition, the hollow portion 34 is covered with the protruding piece 36 to form a gap 38, and the molten resin is accommodated in the gap 38, whereby the reinforcing fiber contained in the molten resin is exposed to the hollow portion 32 side. Can not be.

  The molten resin becomes a melt-solidified portion 58 when cooled. Further, in the melt-solidified portion 58, the boundary line 60 is illustrated here in a state of being cleanly continuous in order to make the boundary line 60 easy to understand. However, in reality, the boundary line 60 itself is formed to be thin with a more complicated shape. The The boundary line 64 of the melt-solidified part 62 described later is the same as the boundary line 60 of the melt-solidified part 58.

  As described above, when the thermoplastic resin is welded, it is possible to eliminate the finishing (deburring) step for removing the welding burr by suppressing the generation of the welding burr that protrudes from the welding part 26. The cost can be reduced.

  In general, a resin member provided with a hollow portion such as a tank or a pipe cannot be deburred on the hollow portion side. Therefore, as in this embodiment, at least the hollow portion 32 (see FIG. 3B) side is used. By suppressing the occurrence of welding burrs, a shape in which no welding burrs are generated on the hollow portion 32 side in a tank, a pipe, or the like is possible.

  That is, in the present embodiment, it is possible to effectively suppress the occurrence of welding burrs while maintaining the welding strength at the welding portions 26 of the upper member 14 and the lower member 16.

  On the other hand, as shown in FIGS. 2A and 2B, in this embodiment, a recess 48 is formed at a substantially central portion in the projecting direction of the flange portion 20 of the upper member 14. A recessed portion 50 that communicates with the recessed portion 48 is formed at a substantially central portion in the projecting direction of the flange portion 24. And in the space part 52 comprised by the hollow part 48 and the hollow part 50, the jaw parts 54 and 56 which expose a part of welding surface 20A by the side of the upper member 14 are formed.

  For this reason, the molten resin that protrudes from the welding surface 20A of the upper member 14 and the welding surface 24A of the lower member 16 flows into the space 52 along the welding surface 20A of the upper member 14. As described above, by providing the space portion 52 separately from the space portion 44 in the weld portion 26 between the upper member 14 and the lower member 16, it is possible to cope with a burr pool when the area of the weld portion 26 is large. . At this time, the molten resin is prevented from flowing into the recess 48 by the jaws 54 and 56 provided in the space 52, and is first guided to the recess 50 (arrow C). And after guiding to the hollow part 50 side, although not shown in figure, molten resin is guided to the hollow part 48 side.

  That is, the molten resin flows from the recess 48 on the lower member 16 side to the recess 50 on the upper member 14 side (melting and solidifying portion 62). For this reason, the reinforcing fibers in the molten resin are oriented from the lower member 16 side to the upper member 14 side, and the upper member 14 and the lower member 16 are substantially at the center in the projecting direction of the flange portions 20 and 24. The welding strength by welding with can be improved.

(Other embodiments)
In this embodiment, as shown in FIGS. 3A and 3B, the flange portion 20 of the upper member 14 and the flange portion 24 of the lower member 16 are welded. However, the upper member 14 and the lower member 16 are welded. Therefore, it is not always necessary to form the flange portion in the upper member 14 and the lower member 16.

  Further, in the present embodiment, the recessed portion 42 and the protruding piece 36 are formed on the upper member 14 and the recessed portion 34 is formed on the lower member 16, but the recessed portion 42 and the protruding piece 36 are formed on the lower member 16. The recess 34 may be formed in the upper member 14.

  Furthermore, in this embodiment, although the recessed parts 48 and 50 are each formed in the approximate center part of the overhanging direction of the flange part 20 of the upper member 14, and the flange part 24 of the lower member 16, the recessed parts 48 and 50 are respectively It is not always necessary that the flange portions 20 and 24 are substantially in the center of the projecting direction, and the recess portions 48 and 50 are not necessarily required.

  In the present embodiment, the surge tank 10 is described as an example of the resin component. However, any resin component that forms a hollow portion by welding two resin members may be used. Not.

10 Surge tank (resin parts)
14 Upper member (second resin member)
16 Lower member (first resin member)
20A welding surface (second welding surface)
24A welding surface (first welding surface)
26 welding part 32 hollow part 34 hollow part (1st hollow part)
34A Side wall 36 Projection piece (projection part)
42 indentation (second indentation)
46 jaws 58 melting and solidifying part

Claims (1)

A first resin member;
A second resin member welded to the first resin member and welded to form a hollow portion with the first resin member;
In the first welding surface on the first resin member side in the welding portion, a first recess portion that is formed so as to face the hollow portion and includes a side wall connected to the first welding surface;
The welding portion extends from the second welding surface on the second resin member side so as to face the hollow portion, and is formed toward the first recess portion with a gap between the second sidewall and the side wall. A protrusion,
In the second welding surface, a second depression that is provided adjacent to the projecting portion and communicates with the first depression and exposes the side wall side of the first welding surface to form a jaw.
A melt-solidified portion that is provided in the second recess and the gap, and melted and melted between the first welding surface and the second welding surface;
Resin parts having.