JP2015212998A - Molding-provided cable and production method of molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding-provided cable which allows improvement of sealing properties between a cable and it and a molding production method.SOLUTION: A sensor module 1 as a molding-provided cable includes a cable 12, a molding 11 which covers a part of the cable 12 in the axial direction, a cylindrical part 21 which contains a hot melt 5 within it, a bottomed cylindrical housing member 2 which has a bottom part 22 provided with an insertion hole 220 to be inserted with the cable 12, and a lid member 3 which is arranged at such a position as to hold the hot melt 5 between the bottom part 22 of the housing member 2 and it, and the hot melt 5 is adhered to the outer peripheral surface 12a of the cable 12 and the inner surface 21a of the housing member 2.

Description

  The present invention relates to a cable with a molded body that covers a part in the axial direction, and a method for manufacturing the molded body.

  Conventionally, as a cable with a molded body, a cable in which a molded connector molded with resin is provided at one end in the axial direction is known (for example, see Patent Document 1).

  The molded connector described in Patent Document 1 includes a terminal fitting having a connecting portion connected to a mating terminal and a crimping portion crimped to the tip of the cable, a portion of the terminal fitting excluding the connecting portion, and a tip of the cable. And a mold resin portion for covering. The mold resin portion includes a main body portion covering the terminal fitting side, a cylindrical portion covering the front end portion of the cable, and a cylindrical protruding portion that protrudes from the cylindrical portion in the cable lead-out direction and is smaller than the outer diameter of the cylindrical portion, Are integrally formed.

  A sealing agent for sealing between the protruding portion and the cable is applied to the outer peripheral surface of the cylindrical protruding portion and the outer peripheral surface of the cable led out from the cylindrical protruding portion. Further, the outer periphery of the sealing agent is covered with a heat shrinkable tube previously inserted through the cable, and the heat shrinkable tube is contracted by heating to tighten the sealing agent from the outer peripheral side. With the above configuration, the sealing property between the mold resin portion and the cable is ensured.

JP 2008-258103 A

  In the sealing structure between the molded resin portion and the cable in the molded connector described in Patent Document 1, when used in a high temperature environment such as use in the vicinity of a vehicle engine room, the sealing agent is remelted by heat. Depending on the usage environment, the sealing property between the molded resin part and the cable may be deteriorated, such as when the heat shrinkable tube becomes loose or when the heat shrinkable tube is used for a long period of time. There is a possibility that it cannot be secured sufficiently.

  Then, an object of this invention is to provide the manufacturing method of the cable with a molded object which can improve the sealing performance between cables, and a molded object.

  In order to solve the above-described problems, the present invention provides a cable, a molded body that covers a part of the cable in the axial direction, a cylindrical portion in which hot melt is accommodated inside, and an insertion hole through which the cable is inserted. A bottomed tubular housing member having a bottom portion formed with a lid member disposed at a position sandwiching the hot melt between the bottom portion of the housing member, and an outer peripheral surface of the cable and the housing Provided is a cable with a molded body in which the hot melt is bonded to the inner surface of a member.

  The present invention is also directed to a method of manufacturing a molded article that covers a part of the cable in the axial direction for the purpose of solving the above-described problem, and includes a cylindrical portion in which hot melt is accommodated inside, and the cable. A bottomed cylindrical housing member having a bottom portion in which an insertion hole to be inserted is formed is mounted on the outer periphery of the cable, and a lid member movable in the axial direction is provided between the bottom portion of the housing member and the hot member. A mounting step of mounting with sandwiching the melt, a disposing step of disposing the cable in the mold, an injection step of injecting a molten resin into the mold from an injection port provided in the mold, and the hot melt An adhesive step of melting the molten resin by heat of the molten resin, and bonding the molten hot melt to the outer peripheral surface of the cable and the inner surface of the housing member; and a solidifying step of solidifying the molten resin Wherein the injection step, to provide a method of manufacturing a molded article flowing the molten resin injected into the mold the lid member to the bottom portion pressing in the axial direction towards the housing member.

  According to the cable with a molded body and the method for producing the molded body according to the present invention, it is possible to improve the sealing performance between the cable and the cable.

It is a perspective view which shows the external appearance of the sensor module which concerns on embodiment of this invention. An example of the configuration of a sensor module is shown, (a) is a top view and (b) is a side view. It is a disassembled perspective view which shows a storage member, a hot melt, and a cover member. It is explanatory drawing which shows the manufacturing process of a molded object, (a) is the state which has arrange | positioned the cable in a metal mold | die, (b) is the state which started injecting molten resin from the injection port of a metal mold | die, (c) is A state in which molten resin is injected into the mold is shown.

[Embodiment]
The sensor module according to the embodiment of the present invention is mounted on a vehicle, for example, and used as an in-vehicle sensor or the like that measures the rotational speed of a wheel, the rotational angle of a handle, or the like. This sensor module is an embodiment of the cable with a molded body of the present invention.

(Configuration of sensor module 1)
The configuration of the sensor module 1 will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a perspective view showing an appearance of a sensor module 1 according to an embodiment of the present invention. 2A and 2B show a configuration example of the sensor module 1, in which FIG. 2A is a top view and FIG. 2B is a side view. In FIG. 2, the molded body 11 is indicated by a two-dot chain line, and when the mold body 11 is removed, a portion that cannot be seen from the outside is indicated by a broken line.

  The sensor module 1 includes a sensor 4 (shown in FIG. 2) that measures a physical quantity, a cable 12 that is electrically connected to the sensor 4, and a molded body 11 that covers an end of the cable 12 in the axial direction on the sensor 4 side. And a housing member 2 for housing the hot melt 5 and a lid member 3 attached to the cable 12 together with the housing member 2.

  The sensor 4 includes, for example, a measurement unit 40 on which a Hall element or the like that detects magnetism is mounted, and a plurality of (two in the present embodiment) lead terminals 41 and 42 provided at one end of the measurement unit 40. Hall switch. The sensor 4 is not limited to measuring the magnetism such as a hall switch or a hall IC, but may be any sensor that can measure a physical quantity while being covered with the molded body 11. For example, the sensor 4 is intended for temperature measurement or vibration measurement. It may be a thing.

  The cable 12 includes a first electric wire 121 having a center conductor 121a and an insulator 121b covering the center conductor 121a, and a second electric wire 122 having an insulator 122b covering the center conductor 122a and the center conductor 122a. It is constituted by covering with.

  As shown in FIG. 2A and FIG. 2B, the first electric wire 121 has a central conductor 121a exposed from the insulator 121b at the tip portion, for example, soldered to one lead terminal 41 of the sensor 4 or the like. Connected by. Similarly, the center conductor 122a exposed from the insulator 122b at the distal end of the second electric wire 122 is connected to the other lead terminal 42 of the sensor 4.

  The molded body 11 is molded using a resin material such as nylon or polybutylene terephthalate (PBT), and has a cylindrical shape extending in the axial direction of the cable 12 as shown in FIG. Note that the molded body 11 does not necessarily have a cylindrical shape, and may be, for example, a rectangular tube shape or a round shape with a rounded tip. The molded body 11 only needs to cover a part of the cable 12 in the axial direction, and does not necessarily cover the terminal portion of the cable 12.

  2 (a) and 2 (b), the hot melt 5 is housed in the cylindrical portion 21 in a solid state, and is melted by the heat of the molten resin when the molded body 11 is molded. The cable 12 is bonded to the outer peripheral surface 12 a and the inner surface 21 a of the housing member 2.

(Configuration of housing member 2 and lid member 3)
Next, the structure of the accommodating member 2 and the lid member 3 will be described with reference to FIG.

  FIG. 3 is an exploded perspective view showing the housing member 2, the hot melt 5, and the lid member 3.

  The housing member 2 and the lid member 3 are molded using a resin material such as nylon or polybutylene terephthalate (PBT), for example, like the molded body 11. The resin material used for the housing member 2, the lid member 3, and the molded body 11 (see FIG. 1) can be appropriately selected depending on the application, and the same resin material can also be used.

  The accommodating member 2 has a cylindrical portion 21 in which the hot melt 5 is accommodated inside, and a bottom portion 22 in which an insertion hole 220 for inserting the cable 12 is formed, and an opening 210 is formed on the opposite side of the bottom portion 22. ing. That is, the housing member 2 is formed in a bottomed cylindrical shape. In the present embodiment, the cylindrical portion 21 is formed in a cylindrical shape, but is not limited thereto, and may be formed in a rectangular tube shape, for example. In FIG. 3, the hot melt 5 and the lid member 3 are illustrated outside the cylindrical portion 21.

  For the hot melt 5, a thermoplastic plastic such as ethylene vinyl acetate (EVA) is used, and its melting point is about 130 ° C. In the present embodiment, the hot melt 5 has a cylindrical shape corresponding to the shape of the cylindrical portion 21, and an insertion hole in which a through hole 50 for penetrating the cable 12 is formed in the bottom portion 22 at the center portion. 220 to correspond to 220.

  The lid member 3 is disposed at a position where the hot melt 5 is sandwiched between the lid member 3 and the bottom 22 of the housing member 2. That is, the lid member 3 is disposed on the opening 210 side of the housing member 2. In the present embodiment, the lid member 3 is accommodated in the cylindrical portion 21, and the outer diameter of the lid member 3 is formed smaller than the inner diameter of the cylindrical portion 21. More specifically, the difference between the inner diameter of the cylindrical portion 21 and the outer diameter of the lid member 3 is about 0.05 to 0.50 mm. However, the present invention is not limited thereto, and the lid member 3 may be disposed so as to close the opening 210 outside the cylindrical portion 21.

  The lid member 3 is formed with an insertion hole 30 through which the cable 12 is inserted, similarly to the bottom 22 of the housing member 2 and the hot melt 5. The insertion hole 30 has an inner diameter larger than the outer diameter of the cable 12. More specifically, the difference between the inner diameter of the insertion hole 30 and the outer diameter of the cable 12 is about 0.05 to 0.50 mm.

(Method for producing molded body 11)
Next, a method for manufacturing the molded body 11 will be described with reference to FIGS. 4 (a) to 4 (c).

  4A and 4B are explanatory views showing the manufacturing process of the molded body 11, FIG. 4A is a state in which the cable 12 is arranged in the mold 6, and FIG. 4B is an injection port of the mold 6. FIG. 4C shows a state in which the molten resin 110 has started to be injected from 61, and FIG. 4C shows a state in which the molten resin 110 has been injected into the mold 6.

  The manufacturing process of the molded body 11 includes a mounting process of mounting the housing member 2 and the lid member 3 on the cable 12, an arrangement process of positioning the cable 12 in the mold 6, and an injection port 61 provided in the mold 6. Injection process for injecting molten resin 110 into mold 6 and hot melt 5 is melted by the heat of molten resin 110, and the molten hot melt 5 is bonded to outer peripheral surface 12 a of cable 12 and inner surface 21 a of housing member 2. And a solidifying step for solidifying the molten resin 110.

  The mold 6 is configured by combining an upper mold 601 and a lower mold 602. In the present embodiment, an injection port 61 for injecting the molten resin 110 is provided on the upper mold 601 side. The injection port 61 may be provided in the lower mold 602, or may be formed by combining the upper mold 601 and the lower mold 602.

  In the mounting process, the housing member 2 is mounted on the outer periphery of the cable 12, and the lid member 3 that can move in the axial direction of the cable 12 is moved in the axial direction of the cable 12 from the opening 210 side of the housing member 2. The hot melt 5 is sandwiched between the two bottom portions 22 and mounted. At this time, a gap is formed between the inner surface of the housing member 2 and the outer peripheral surface of the lid member 3.

  In the arranging step, the cable 12 to which the housing member 2 and the lid member 3 are attached is arranged in the mold 6. At this time, the accommodating member 2 is supported by a plurality of pins 62 (two in the upper die 601 and two in the lower die 602 in FIG. 4A) provided in the die 6. The plurality of pins 62 are retracted into an accommodation space (not shown) formed in the mold 6 when the molten resin 110 around the accommodation member 2 starts to solidify in the solidification process.

  Note that it is not always necessary to place the cable 12 in the mold 6 after the housing member 2 and the lid member 3 are attached to the cable 12. For example, after the cable 12 is placed in the mold 6, the half-structured housing member 2. The lid member 3 may be attached to the cable 12. That is, the order of the mounting process and the placement process is not limited.

  In the injection process, as shown in FIG. 4B, the molten resin 110 injected from the injection port 61 starts to flow along the inner surfaces 601a and 602a of the upper mold 601 and the lower mold 602. 4C, the molten resin 110 flows so as to press the lid member 3 in the axial direction of the cable 12 toward the bottom 22 of the housing member 2. As shown in FIG.

  In the present embodiment, the injection port 61 opens on the inner surface 601a of the upper mold 601 on the opening 210 side of the cylindrical portion 21 with respect to the bottom portion 22 of the housing member 2, and faces the lid member 3 or the cable 12 (FIG. 4). (B) arrow) Molten resin 110 is injected.

  In the bonding step, the hot melt 5 having a melting point of about 130 ° C. starts to melt by the heat of the molten resin 110 having a temperature of about 270 ° C. The molten hot melt 5 adheres to the outer peripheral surface 12 a of the cable 12 and the inner surface 21 a of the cylindrical portion 21 of the housing member 2.

  The hot melt 5 fills the space between the outer peripheral surface 12 a of the cable 12 and the inner surface 21 a of the cylindrical portion 21 of the housing member 2 and functions as a seal member between the cable 12 and the housing member 2.

  The molten resin 110 injected into the mold 6 is solidified by natural cooling in the solidification step, and the molded body 11 is formed.

(Operation and effect of the embodiment)
According to the embodiment described above, the following operations and effects can be obtained.

(1) Because the hot melt 5 is accommodated inside the accommodating member 2 arranged inside the molded body 11, and the hot melt 5 adheres to the outer peripheral surface 12a of the cable 12 and the inner surface 21a of the accommodating member 2. For example, even when the sensor module 1 is used in a high temperature environment, the hot melt 5 housed inside the housing member 2 is difficult to be remelted. Further, even when the hot melt 5 is remelted, the molten hot melt 5 hardly leaks from the housing member 2, and the sealing property between the cable 12 and the molded body 11 (housing member 2) is improved. It is possible to increase.

(2) Since the lid member 3 is accommodated in the cylindrical portion 21 of the accommodating member 2, the lid member 3 can press the hot melt 5 more reliably.

(3) In the injection process in the manufacturing process of the molded body 11, the molten resin 110 injected into the mold 6 presses the lid member 3 toward the bottom 22 of the housing member 2 in the axial direction of the cable 12. In order to flow, the hot melt 5 is bonded to the outer peripheral surface 12 a of the cable 12 and the inner surface 21 a of the cylindrical portion 21 of the housing member 2 in a compressed state in the cylindrical portion 21. Thereby, the sealing performance between the outer peripheral surface 12a of the cable 12 and the inner surface 21a of the accommodating member 2 is improved.

(4) Since the injection port 61 of the molten resin 110 is open to the inner surface 601a of the upper mold 601 on the opening 210 side of the cylindrical portion 21 relative to the bottom portion 22 of the housing member 2, the injection port 61 and the lid member 3 For example, the outlet 61 is closer to the bottom 22 side in the axial direction of the cable 12. Therefore, the molten resin 110 can press the lid member 3 with a greater pressing force with momentum during injection.

(5) In the injection process, since the molten resin 110 is injected toward the lid member 3 or the cable 12 and the molten resin 110 flows in a direction in which the lid member 3 is directly pressed, the lid member 3 has a greater pressing force. And the hot melt 5 is further compressed.

(6) Since the hot melt 5 is melted by the heat of the molten resin 110 at the time of molding the molded body 11, it is not necessary to separately provide a process for heating and melting the hot melt 5 with a heater or the like. In addition, since it is not necessary to prepare a member such as a heat-shrinkable tube, the cost can be reduced.

(7) Since the inner diameter of the insertion hole 30 of the lid member 3 is larger than the outer diameter of the cable 12, and the outer diameter of the lid member 3 is smaller than the inner diameter of the cylindrical portion 21 of the housing member 2, the housing member 2. The lid member 3 can be easily moved relative to the housing member 2, and the melted hot melt 5 can be suppressed from flowing out of the housing member 2.

(Summary of embodiment)
Next, the technical idea grasped from the embodiment described above will be described with reference to the reference numerals in the embodiment. However, the reference numerals and the like in the following description are not intended to limit the constituent elements in the claims to the members and the like specifically shown in the embodiments.

[1] A cable (12), a molded body (11) that covers a part of the cable (12) in the axial direction, a cylindrical part (21) in which a hot melt (5) is accommodated, and a cable (12 ) Between the bottomed tubular housing member (2) having a bottom (22) in which an insertion hole (220) is formed and the bottom (22) of the housing (2). And a lid member (3) disposed at a position between which the hot melt (5) is adhered to the outer peripheral surface (12a) of the cable (12) and the inner surface (21a) of the housing member (2). Body cable (sensor module 1).

[2] The cable with the molded body (sensor module 1) according to [1], wherein the lid member (3) is accommodated in the cylindrical portion (21) of the accommodation member (2).

[3] The lid member (3) has an insertion hole (30) through which the cable (12) is inserted, and the insertion hole (30) of the lid member (3) has an inner diameter that is the outer diameter of the cable (12). The cover member (3) is a cable with a molded body (sensor module 1) according to [2], wherein the outer diameter of the lid member (3) is smaller than the inner diameter of the cylindrical portion (21) of the housing member (2).

[4] The difference between the inner diameter of the insertion hole (30) of the lid member (3) and the outer diameter of the cable (12), and the inner diameter of the cylindrical portion (21) of the housing member (2) and the outer side of the lid member (3) The difference from the diameter is 0.05 to 0.50 mm, respectively, according to [3] (sensor module 1).

[5] A method of manufacturing a molded body (11) that covers a part of the cable (12) in the axial direction, the cylindrical portion (21) in which the hot melt (5) is accommodated, and the cable (12) A bottomed cylindrical housing member (2) having a bottom portion (22) formed with an insertion hole (220) through which the cable is inserted is attached to the outer periphery of the cable (12), and a lid member (3 that is movable in the axial direction) ) With the hot melt (5) sandwiched between the bottom part (22) of the housing member (2), an arrangement process for arranging the cable (12) in the mold (6), and a mold An injection step of injecting the molten resin (110) into the mold (6) from the injection port (61) provided in (6), and melting the hot melt (5) by the heat of the molten resin (110) The hot-melt (5) that has been subjected to the outer peripheral surface (12a) of the cable (12) and It has an adhesion process for bonding to the inner surface (21a) of the container member (2) and a solidification process for solidifying the molten resin (110). In the injection process, the molten resin (110 injected into the mold (6) is provided. ) In which the lid member (3) flows in the axial direction toward the bottom (22) of the housing member (2).

[6] The injection port (61) opens to the inner surface (601a) of the mold (6) on the opening (210) side of the cylindrical portion (21) relative to the bottom (22) of the housing member (2). The method for producing a molded article (11) according to [5].

[7] The method for producing a molded body (11) according to [6], wherein in the injection step, the molten resin (110) is injected toward the lid member (3) or the cable (12).

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  The present invention can be appropriately modified and implemented without departing from the spirit of the present invention. For example, in the above embodiment, the cable 12 is formed by covering the first and second electric wires 121 and 122 having the central conductors 121a and 122a and the insulators 121b and 122b with the sheath 123. For example, a cable made of a conductor and a sheath may be used without having an insulator or the like, or a cable formed by covering three or more electric wires with a sheath. That is, it is possible to apply a cable according to the application of the sensor module 1.

  Moreover, in the said embodiment, although the sensor module 1 was demonstrated as one aspect | mode of the cable with a molded object, it is not restricted to this, For example, it is possible to apply a cable with a molded object to a connector etc.

  Moreover, in the said embodiment, although the accommodating member 2 and the cover member 3 were respectively comprised by one member, it may comprise not only this but combining the member of a half shape, for example.

  In the above embodiment, only one injection port 61 of the mold 6 is shown in FIGS. 4A to 4C. However, the present invention is not limited to this, and a plurality of injection ports 61 are provided. It may be.

1. Sensor module (cable with molded body)
2 ... Accommodating member 3 ... Lid member 5 ... Hot melt 6 ... Mold 11 ... Molded body 12 ... Cable 12a ... Outer peripheral surface 21 ... Cylindrical portion 21a ... Inner surface 22 ... Bottom 30 ... Insertion hole 61 ... Injection port 110 ... Molten resin 210 ... Opening 220 ... Insertion hole 601 ... Upper mold 602 ... Lower mold 601a, 602a ... Inner surface

Claims (7)

Cable and
A molded body covering a part of the cable in the axial direction;
A tubular member containing a bottom with a cylindrical portion in which hot melt is accommodated inside, and a bottom portion in which an insertion hole through which the cable is inserted is formed;
A lid member arranged at a position sandwiching the hot melt between the bottom of the housing member,
The cable with a molded body, wherein the hot melt is bonded to an outer peripheral surface of the cable and an inner surface of the housing member. The lid member is housed in the tubular portion of the housing member;
The cable with a molded body according to claim 1. The lid member is formed with an insertion hole through which the cable is inserted,
The insertion hole of the lid member has an inner diameter larger than the outer diameter of the cable,
The lid member has an outer diameter smaller than an inner diameter of the cylindrical portion of the housing member,
A cable with a molded body according to claim 2. The difference between the inner diameter of the insertion hole of the lid member and the outer diameter of the cable, and the difference between the inner diameter of the cylindrical portion of the housing member and the outer diameter of the lid member are 0.05 to 0.50 mm, respectively. is there,
A cable with a molded body according to claim 3. A method of manufacturing a molded body covering a part of the cable in the axial direction,
A bottomed cylindrical storage member having a cylindrical portion in which hot melt is accommodated inside and a bottom portion in which an insertion hole for inserting the cable is formed is mounted on the outer periphery of the cable and is movable in the axial direction. A mounting step of mounting a lid member with the hot melt sandwiched between the bottom portion of the housing member;
An arrangement step of arranging the cable in a mold;
An injection step of injecting molten resin into the mold from an injection port provided in the mold;
An adhesion step in which the hot melt is melted by heat of the molten resin, and the melted hot melt is adhered to the outer peripheral surface of the cable and the inner surface of the housing member;
A solidifying step for solidifying the molten resin,
In the injection step, the molten resin injected into the mold flows so as to press the lid member in the axial direction toward the bottom portion of the housing member. The injection port is open to the inner surface of the mold on the opening side of the cylindrical portion than the bottom portion of the housing member.
The manufacturing method of the molded object of Claim 5. In the injection step, the molten resin is injected toward the lid member or the cable.
The manufacturing method of the molded object of Claim 6.