JP6006139B2 - Manufacturing method of connector member - Google Patents

Description

The present invention relates to a connector member used for a pipe connection structure. In particular, the present invention relates to a connector member formed by injection molding of synthetic resin and having a plurality of tubular portions.

In a hydraulic circuit, a liquid feeding circuit, etc., a pipeline block provided with a pipeline inside is arranged opposite to each other, and the pipelines provided in each pipeline block are connected to each other to form a series of pipelines and Technology is used. For example, such a pipe block or pipe connection structure is adopted in a hydraulic circuit of an automatic transmission of an automobile, a refrigerant circulation circuit of an air conditioner, or the like.

In connecting pipe lines between the pipe blocks, a tubular connector member is often interposed between the pipe blocks in order to ensure the sealing performance while facilitating the connection work.
For example, Patent Document 1 has a flange portion on the outer periphery of the intermediate portion in the length direction when mutually connecting the passages (exit, connection port) of the liquid tank and the double pipe joint block to be coupled to each other. The connection pipes at both ends of the pipe joint (connector member) are inserted into the opening ends of the respective passages via O-rings, and the flange is accommodated in the annular accommodating recess provided in the block, and the liquid tank is doubled. A technique for clamping between joint surfaces of a pipe joint block is disclosed. According to the connector member and the connection structure, it is disclosed that the cost can be reduced with a simple configuration.

JP 2005-207463 A

The inventors have examined forming such a connector member by injection molding of a synthetic resin. In particular, it is considered to form a connector member in which a plurality of tubular portions are connected by a plate-like connecting portion by injection molding. Since the connector member in which a plurality of tubular portions are connected can connect a plurality of pipelines simultaneously with a single connector member, the pipeline connection work between the pipeline blocks becomes efficient.

In injection molding of a connector member in which a plurality of tubular portions are connected, a gate for injecting resin is often disposed on each of the plurality of tubular portions. In that case, a weld is likely to occur at the connecting portion connecting between the tubular portions. When a weld is generated in the connecting portion, the connecting portion is likely to be damaged at the weld portion when the connector member is handled during a connection operation or the like.

An object of the present invention is to increase the strength of a connecting portion connecting between tubular portions in a connector member having a plurality of tubular portions.

As a result of earnest study, the inventor provides a flow control unit of a specific form in the connection part of the connector member having a plurality of tubular parts, and controls the resin flow during injection molding, thereby generating the connection part. The present invention was completed by discovering that the form of the weld (weld surface) can be controlled and the strength of the connecting portion can be increased.

The present invention is made of synthetic resin, a method of manufacturing by injection molding a connector member used in a fluid circuit, said connector member and having at least two hollow tubular portion, the two tubular portions connecting are integrated with each other by parts, the connecting portion, adjacent to the tubular portion of the respective adjacent, Rutotomoni controlled unit a plurality of flow forming, upon injection molding, the cavity of shape corresponding to the shape of the connector member formed prepare the injection mold can be, in the above injection process using an injection molding die, for each of the tubular section cavity emits a gate of a synthetic resin which is provided, the side of the flow controller of one of the tubular portion portion forming the can, the injected resin with narrow flow flowing into the coupling portion cavity from one of the tubular section cavity from the gate, the side of the flow system of the other tubular portion Portion forming a part, as the flow is not directly flow into the other tubular section cavity has a surface that blocks the flow, is a manufacturing method of the connector member (first invention).

In the present invention, the connecting portion is formed in a plate shape, the flow control portion is formed in a recessed portion, and in the vicinity of the connecting portion between the connecting portion and one tubular portion, a recessed portion is formed on the front side of the plate-like connecting portion, In the vicinity of the connecting portion between the connecting portion and the other tubular portion, a recess is preferably formed on the back side of the plate-like connecting portion (second invention). Alternatively, in the present invention, the flow control part is formed in the hole or notch, and the hole or notch is adjacent to the other tubular part on the extension line of the flow of the resin flowing into the connecting part cavity from the one tubular part cavity. Is preferably provided (third invention). In the present invention, a gate provided in the tubular portion cavity disk gate der Rukoto preferably (fourth invention).

According to the connector member of the present invention (first invention), the strength of the connecting portion of the connector member made of synthetic resin can be increased. Moreover, if it is made like 2nd invention or 3rd invention, a connector member can be manufactured efficiently and economically.
be able to.

Moreover, if the gate provided in the tubular portion cavity is a disk gate as in the fourth invention, the pressure resistance of the connector member is more reliably ensured.

It is a figure which shows the connector member of 1st Embodiment of this invention. It is sectional drawing which shows a mode that the pipe line of a pipe line block is connected by the connector member of 1st Embodiment of this invention. It is sectional drawing of the injection mold of the connector member of 1st Embodiment of this invention. It is sectional drawing which shows a mode that resin is filled in the cavity of the injection mold of a connector member. It is a figure which shows the connector member of 2nd Embodiment of this invention. It is a figure which shows the connector member of 3rd Embodiment of this invention. It is a figure which shows the generation | occurrence | production form of the weld in the conventional connector member. It is a figure which shows the other generating form of the weld in the conventional connector member.

Hereinafter, an embodiment of the present invention will be described by taking a connector member used in a hydraulic circuit of an automatic transmission of an automobile as an example with reference to the drawings. In addition, this invention is not limited to the separate embodiment shown below, The form can also be changed and implemented.

FIG. 1 shows a connector member 1 according to a first embodiment of the present invention. In FIG. 1, a part of the connector member is shown as a sectional view, and the remaining part is shown as an external view. The connector member 1 is a synthetic resin member, and is formed into a shape in which two tubular portions 11 and one connecting portion 12 are integrated in a substantially H shape.
The tubular portion 11 is hollow and is formed in a straight tubular shape having a cylindrical cross section. The two tubular portions 11 and 11 are arranged in parallel with a predetermined interval.

Seal grooves 14 and 14 are provided in the vicinity of both ends in the length direction of the tubular portion 11 of the connector member 1, respectively. In the present embodiment, two seal grooves 14 are formed in each tubular portion as ring-shaped grooves having a substantially rectangular groove cross section. An O-ring, which will be described later, is mounted in the seal groove 14, and the space between the connector member and the inner peripheral surface of the pipe line is sealed by the O-ring. In this embodiment, the front-end | tip part of the length direction of the tubular part 11 of the connector member 1 is made into the taper shape, and is easy to insert in a pipe line.

The connection part 12 is a part formed in a plate shape, and is formed integrally with the tubular part so as to connect between the tubular parts 11, 11 between the substantially central parts in the tube axis direction. That is, the tubular portions are integrated with each other by the connecting portion 12, and the interval and direction of the tubular portions 11, 11 are maintained. The connecting portion may have a shape other than a plate shape, such as a rod shape, a pillar shape, or a cylindrical shape. In the present embodiment, the plate-like connecting portion 12 is provided so that the normal line of the surface on the front side or the surface on the back side of the plate is parallel to the axis of the tubular portion 11.

Flow control units 13 and 13 are formed in the coupling unit 12. As will be described later, the flow control unit functions to control the flow of the resin when the resin flows and fills the connecting portion during injection molding. The flow control parts 13 and 13 are formed so that a plurality of flow control parts make a pair in the vicinity of the adjacent tubular parts 11 and 11. At the time of injection molding, resin flows from the tubular portion 11 to the connecting portion 12, but the flow control portion 13 is provided so as to restrict the resin flow flowing from the respective tubular portions 11, 11 to the connecting portion 12. That is, the connecting portion 12 is provided with the flow control portion 13 and has a smaller cross-sectional area (a cross-sectional area in a plane parallel to the tubular portion axis and perpendicular to the paper surface of FIG. 1) than the central portion of the connecting portion 12. It is formed as follows. And the flow control part 13 forms the surface 13a which interrupts the flow so that the flow of the resin which flows into the connection part 12 from one tubular part 11 may not flow straight into the other tubular part 11 as it is. Thus, the flow control unit 13 is formed.

That is, the flow control units 13 and 13 are arranged so as to make a pair in the vicinity of the tubular parts on both sides of the connecting part 12, and the flow control part 13 flows the resin flowing into the connecting part 12 from the tubular part 11. At the same time, the mutual arrangement is determined so as to block the flow of resin from the opposite tubular portion.

In this embodiment, the flow control parts 13 and 13 are formed as two recessed parts. The first flow control part (concave part) is formed on the front side of the plate-like connecting part 12 in the vicinity of the connecting part between the connecting part 12 and the one tubular part 11. The second flow control part (concave part) is formed on the back side of the plate-like connecting part 12 in the vicinity of the connecting part between the connecting part 12 and the other tubular part 11. The flow control portions (recess portions) 13 and 13 are provided at a depth that is approximately half the plate thickness of the plate-like connecting portion.
In other words, the plate-like connecting portion 12 is arranged such that a plate protruding from one tubular portion and a plate protruding from the other tubular portion are arranged such that the tip portions of the respective plates overlap each other. However, it has an integrated shape.

As will be described later, the connector member 1 is a member formed by injection molding of synthetic resin. The molded connector member 1 has a gate mark corresponding to the gate into which resin is injected during injection molding. In the present embodiment, the gate marks are present in a ring shape on the inner peripheral surface side of the end portions of the tubular portions 11 and 11 of the connector member 1 (not shown). That is, in the molding of the connector member 1 of the present embodiment, the resin is injected by the disk gate connected to the inner peripheral surface side of each tubular portion 11, 11.

The synthetic resin constituting the connector member 1 is not particularly limited as long as it is a resin that can be molded by injection molding. Preferably, an olefin resin such as a polypropylene resin, a thermoplastic resin such as a polyamide resin or an acrylonitrile butadiene styrene resin, a thermosetting resin such as a melamine resin, rubber, a thermoplastic elastomer, or the like can be used. The connector member 1 of this embodiment is formed of a polyamide resin.

A state in which the pipe line of the hydraulic circuit is connected by the connector member 1 will be described with reference to FIG. FIG. 2 shows a part of the pipe block in cross section and the connector member 1 in appearance. Here, the pipeline block is a member in which a pipeline is formed, and when a predetermined pipeline block is arranged opposite to each other in a predetermined positional relationship, the internal pipeline communicates to complete a series of pipelines. It is the member comprised so that it might do. The pipe block is typically made of an iron-based alloy, an aluminum alloy, a synthetic resin, or the like. A plurality of pipelines are preferably formed in the pipeline block. These conduits are typically formed by machining or the like.

The connector member 1 is interposed between the opposing pipe blocks 3 and 4 to connect the pipes 31 and 41. In this embodiment, there are a pipe block 3 on the pressure control valve side and a pipe block 4 on the pipe side, and each pipe block is provided with pipes 31 and 41 inside the block by drilling. ing. As shown in FIG. 2 (a), when the tubular portions 11 and 11 of the connector member 1 are disposed so as to enter the conduits 31 and 41, and the conduit blocks 3 and 4 are disposed so as to face each other, they are opposed to each other. The pipe lines 31 and 41 are connected through the connector member 1.

In the connector member 1, both end portions of the tubular portions 11, 11 of the connector member are inserted into the pipe line 31 and the pipe line 41, respectively, with the seal materials (O-rings) 2, 2 attached to the seal grooves 14, 14. These pipes are connected (FIG. 2 (b)). That is, the space between the outer peripheral surface of the tubular portion 11 of the connector member and the inner peripheral surfaces of the pipes 31 and 41 is sealed by the sealing materials (O-rings) 2 and 2.

Note that the sealing material is not limited to the O-ring as long as the sealing portion can be sealed to the required level, and other sealing materials and seal structures may be used. For example, the elastomer material may be secondarily formed in the formed seal groove 14 portion, and the seal material may be integrally formed in the seal groove portion. Further, if the required degree of sealing performance is low, the sealing groove may not be provided.

A method for manufacturing the connector member 1 will be described. The connector member 1 is manufactured by resin injection molding. FIG. 3 shows a mold used for injection molding of the connector member 1. FIG. 3 is a cross-sectional view schematically showing a state where the mold is closed. A set of cavity molds D1, D2, and D3 are provided to form a cavity having an inner surface shape that matches the outer surface shape of the connector member 1, and a cylindrical core mold that matches the inner surface shape of the connector member 1 is provided in the cavity mold. C1 and C1 are provided. FIG. 3 shows the cavity molds D1, D2 and D3 and the core molds C1 and C1 in cross-sectional views. In the present embodiment, the cavity mold D1 and the cavity molds D2 and D3 are divided by a surface serving as one end surface of the connector member 1. The cavity molds D2 and D3 are divided by a plane including the central axis of the connector member 1 (a plane parallel to the paper surface). The cavity molds D1, D2, D3 and the core mold C1 are appropriately provided with an opening / closing mechanism and a slide mechanism to enable injection molding and removal of a molded product, but detailed illustration and description thereof are omitted. .

Resin is injected from a sprue provided in the upper cavity mold D1 in FIG. The end face of the core mold C1 and the cavity mold D1 are provided to face each other with a slight gap in a state where the mold is closed, thereby forming a disk-shaped space continuous with the sprue. In the disk-shaped space, the outer periphery of the disk is connected to the inner periphery of the cavity space in which the tubular portion of the connector member is formed. That is, when resin is injected from the sprue, the resin is supplied to the cavity space where the connector member is formed, through the end face of the core mold C1 and the disk gate formed by the cavity mold D1.

A plurality of gates are provided corresponding to each of the tubular portions 11 and 11 of the connector member.
In the present embodiment, the resin is injected into the tubular portion by the disk gate, but the gate may be in another form, for example, a pin gate. If the gate is a disk gate as in the present embodiment, resin is continuously supplied in a cylindrical shape by the disk gate to the cavity space in which the tubular part is formed. This is particularly preferable for improving the pressure resistance of the connector member.

After the resin is filled in the cavity and the resin is solidified, the mold is opened and the molded product (connector member 1) is taken out. At this time, the disk gate portion is removed from the connector member 1, and the connector member 1 has a gate mark where the disk gate portion is connected.

The timing between the mold opening and taking out of the molded product and the separation of the disc gate portion can be performed at various timings. For example, by making full use of the mold slide mechanism and adjusting the timing of injection molding and mold slide, before opening the mold, the disk gate part is cut off inside the mold and then the mold is opened. Then, the molded product may be taken out. Alternatively, the disk gate portion may be separated when the mold is opened and the molded product is taken out by making full use of the mold slide mechanism and adjusting the timing of mold opening and mold slide. Alternatively, after the injection molding, the molded product may be taken out with the connector member 1 portion and the disc gate portion integrated, and the disc gate portion may be separated from the connector member 1 by post-processing.

The operation and effect of the connector member 1 will be described.
Due to the action of the flow control unit 13 provided in the connection part 12 of the connector member 1, the form of the weld generated in the connection part changes with the injection molding, and the strength of the connection part is increased. Hereinafter, a mechanism for increasing the strength of the connecting portion will be described while explaining the flow of injected resin and the state of filling.

FIG. 4 is a diagram showing step by step how the injected resin fills the cavity in which the connector member 1 is formed. As shown in FIG. 4 (a), resin flows from the disk gate (not shown) provided on the upper side of the figure into the cavity of the tubular part, and the resin flows from the upper side to the lower side of the figure. Fill the cavity.

Thereafter, when the tip of the resin reaches a portion where the cavity of the connecting portion branches, as shown in FIG. 4B, the resin branches and flows into the cavity of the connecting portion. That is, the resin flows into the cavity of the connecting portion from the tubular portion cavities on both sides. In addition, the partial figure enclosed with the circle in FIG. 4 is an enlarged view of the cavity part of a connection part.

In the prior art, when the resin flows into the connecting portion cavity from both sides, a weld surface W that penetrates the plate-like connecting portion in the plate thickness direction is formed at the portion where the tips of the resin collide with each other. This is shown in FIG. When such a weld is formed, the plate-like connecting portion is easily cracked and separated at the weld portion, so that the strength of the connecting portion is lowered.

In the connector member of this embodiment, as shown in FIG. 4B, the flow of the resin flowing into the connecting portion cavity is restricted by the flow control portion 13. And the resin flow which flows in from the tubular part of both sides becomes a flow mutually offset in the plate | board thickness direction (up-down direction of a figure) of the connection part 13 by presence of the flow control part 13. FIG.

Thereafter, the tip of the resin flow reaches the center of the coupling portion cavity as shown in FIG. At this time, since the resin flows squeezed by the flow control unit 13 are offset from each other in the plate thickness direction of the connecting portion, they flow in a passing manner without colliding with each other from the front. When a sufficient amount of resin is filled in the connecting portion cavity, the connecting portion cavity is filled with resin as shown in FIG. At this time, the portions where the respective resin flows that have flowed in from the tubular portions on both sides form a weld surface WF. However, since the resin flow is a flow that passes, the weld surface WF It is not formed along the plate thickness direction (vertical direction in the figure), but rather in the direction along the plate shape of the connecting portion (horizontal direction in the figure). As a result, the weld surface WF has a larger area and superior strength as compared with the weld in the case of the prior art. According to the above embodiment, the strength of the connecting portion is thus improved.

In particular, in this embodiment, the flow control parts 13 and 13 are formed as two recessed parts provided so as to make a pair on the front side and the back side. That is, the first flow control part (concave part) is formed on the front side of the plate-like connecting part 12 in the vicinity of the connecting part between the connecting part 12 and the one tubular part 11. The second flow control part (concave part) is formed on the back side of the plate-like connecting part 12 in the vicinity of the connecting part between the connecting part 12 and the other tubular part 11. The flow control part (concave part) is provided at a depth of about half the plate thickness of the plate-like connecting part. In such a form, an injection mold is simple, and manufacturing efficiency and economy are high.

In addition, as shown in FIG. 8, in the prior art, if there is a variation in the timing and pressure of supplying the resin to each tubular portion, the resin that has flowed from the tubular portion on one side to the connecting portion remains as it is on the other side. There is a possibility that the tubular portion on the side is reached and a weld surface is formed in the other tubular portion. If it becomes like this, the thickness of the other tubular portion will be substantially reduced, and the pressure resistance may be impaired.

According to the above embodiment of the present invention, the flow control unit on the side of the other tubular part is configured to prevent the flow of the resin flowing from one tubular part to the connecting part from flowing into the other tubular part as it is. Therefore, the occurrence of molding defects as shown in FIG. 8 is suppressed. Therefore, it contributes to the improvement of pressure resistance of the connector member.

The present invention is not limited to the above embodiment, and can be implemented with various modifications. Other embodiments of the present invention will be described below. However, in the following description, portions different from the above embodiment will be mainly described, and detailed descriptions of the same portions will be omitted. In addition, these embodiments can also be implemented by combining some of them or replacing some of them.

In FIG. 5, the connector member 5 of 2nd Embodiment of this invention is shown. In this embodiment, the three tubular parts 51 and 51 are arrange | positioned in parallel, and the space between them is integrally molded by the shape connected by the plate-shaped connection parts 52 and 52. FIG. Thus, the connector member may be provided with two or more tubular parts. For example, if three or four tubular parts are provided, a large number of pipe lines can be connected at one time. And the connection work becomes more efficient. That is, the number of tubular portions in the connector member of the present invention may be at least two. In addition, the tubular portion of the connector member of the present embodiment is not provided with a seal groove.

Moreover, in this embodiment, the specific form of the flow control parts 53 and 53 provided in the connection parts 52 and 52 differs. The point where the connecting part is plate-shaped, the point where the flow control part is formed in the concave part, and the flow control part are provided in close proximity to one tubular part and the other tubular part, one of which is a plate It is the same as that of 1st Embodiment by the point by which the other is provided in the front side of a shape connection part and a back side. In the present embodiment, two pairs of such flow control units are provided in one connecting unit. Thus, a plurality of flow control units can be provided at positions close to the tubular unit.

Furthermore, in the present embodiment, two pairs of flow control units are provided so that the front / back arrangement of the plate-like connecting units is reversed. That is, in the figure seen in the direction along the tubular portion axis in FIG. 5, the flow control unit provided in the connecting portion 52 located on the left side is the upper surface in the order of the upper left / upper right / lower left / lower right positions in the drawing. (Front side of the paper) / Lower surface (back side of the paper) / Lower surface / Upper surface. Even if the flow control unit is provided in this way, as in the first embodiment, the merged resin merges at the center of the coupling part so that the weld surface is widened and the strength of the coupling part is improved. To do.

In particular, as in this embodiment, when a plurality of pairs of flow control units are provided so that adjacent flow control units are arranged opposite to each other, the flow of resin in the flow control unit is reduced. It becomes complicated and the shape of the weld surface where the resin merges becomes a three-dimensional complicated shape, which is effective in improving the strength of the connecting portion.

In FIG. 6, the connector member 6 of 3rd Embodiment is shown. The connecting portion 62 in the present embodiment is formed in a column shape. Moreover, the flow control part 63 is provided as a notch or a hole that penetrates the columnar connecting part in the axial direction of the tubular part.

The arrangement of holes and notches that are the flow control unit 63 will be described. A total of four flow control parts (holes, notches) 63 are provided, two at a position close to the adjacent tubular part. When viewed along the axis of the tubular part (lower figure), the longitudinal direction of the connecting part (horizontal direction in the figure) is the flow direction of the resin when the connecting part is filled with resin. The flow control parts 63 and 63 are provided so that a hole or a notch is located in the vicinity of the other tubular part 61 on the extension line of the flow flowing into the connecting part 62 from the tubular part 61. That is, at a position close to one tubular portion (for example, the left tubular portion), the connecting portion is solid / hole / solid / notched from the upper side of the figure, and the other tubular portion. In the position close to the (right tubular portion), the connecting portion is notched / solid / hole / solid from the upper side of the figure, and when corresponding to the flow direction, one is solid ( The flow control unit 63 is formed so that the other part is a hole or a notch at a portion filled with resin.

In other words, the connecting portion in the present embodiment is configured such that the plate-like elements that are formed to project from the respective tubular portions toward the other tubular portion, and the tip portions of these elements are alternately arranged at the central portion between the tubular portions. It has a shape that overlaps and integrates.

Even if the flow control unit is provided in such a form, as in the first embodiment, since the resin that merges at the central part of the coupling part merges so as to pass each other, the weld surface becomes wide, and the strength of the coupling part Will improve. In addition, this embodiment is also highly efficient and economical.

Furthermore, as in the present embodiment, if one notch is provided with three, preferably four or more notches or holes as a flow control part, a plurality of resin flows from both sides of the connecting part. , The flows merge so that they flow alternately at the center of the connecting part. Then, a plurality of weld surfaces as described with reference to FIG. 4 are generated. Such a configuration is particularly preferable for increasing the strength of the connecting portion because the load can be distributed over a plurality of weld surfaces.

The connector member may have a shape having other parts in addition to the hollow tubular portion. As another part, the key part etc. for preventing the incorrect assembly | attachment of a connector member can be illustrated.

The specific application field in which the connector member is used is not particularly limited, and can be widely applied as long as the connector member made of a synthetic resin is applicable, such as a fluid circuit through which a fluid flows. For example, the connector member of the present invention can be used for a pipeline block such as a hydraulic circuit, a refrigerant pipe, a cooling water circulation system, a pressure transmission system, and a flow rate adjustment valve. In addition, not only circuits that transmit hydraulic pressure such as hydraulic pressure and water pressure, but also circuits that transmit gas pressure such as air pressure, various pressure transmission circuit pipelines, liquid feeding circuits, A conduit such as an infusion circuit or a tube can be connected by a connector member.

The connector member of the present invention can be used, for example, for connection of a pipeline provided in a pipeline block of a hydraulic circuit, and has high industrial utility value.

DESCRIPTION OF SYMBOLS 1 Connector member 11 Tubular part 12 Connection part 13 Flow control part 14 Seal groove 2 Seal material (O-ring)
3, 4 Pipe blocks 31, 41 Pipe lines D1, D2, D3 Cavity mold C1 Core molds 5, 6 Connector members 51, 61 Tubular parts 52, 62 Connection parts 53, 63 Flow control part

Claims (4)

A method of manufacturing a connector member made of a synthetic resin and used for a fluid circuit by injection molding ,
The connector member has at least two hollow tubular parts, and the two tubular parts are integrated with each other by a connecting part, and the connecting part is adjacent to each adjacent tubular part and has a plurality of flow controls. parts are formed Rutotomoni,
For injection molding, prepare an injection mold that can form a cavity with a shape that matches the shape of the connector member.
Wherein in the injection process using the injection mold, injecting a synthetic resin from a gate provided for each of the tubular section cavity,
Portion forming the flow control unit on the side of one of the tubular portions, resin injected from the gate together with squeeze flow flowing into the coupling portion cavity from one of the tubular section cavity,
The portion forming the flow control portion on the side of the other tubular portion has a surface that blocks the flow so that the flow does not flow into the other tubular portion cavity as it is .
A manufacturing method of a connector member. The connecting part is formed in a plate shape, the flow control part is formed in a recessed part, a recessed part is formed on the front side of the plate-like connecting part near the connecting part between the connecting part and one tubular part, and the connecting part and the other part the connecting portion near the tubular portion, the manufacturing method of the connector member according to the plate-like connecting portion rear recess <br/> is Ru formed claims 1. 2. The flow control portion is formed in a hole or notch, and a hole or notch is provided adjacent to the other tubular portion on an extension of the flow of resin flowing from one tubular portion cavity into the connecting portion cavity. The manufacturing method of the connector member of description. 4. The method for manufacturing a connector member according to claim 1, wherein the gate provided in the tubular portion cavity is a disk gate .

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