JP5903317B2 - Mold for producing composite product and method for producing composite product - Google Patents

Description

  The present invention relates to a mold for manufacturing a composite product in which members of different materials are integrated and combined, and a method for manufacturing the composite product. For example, a cable for an endoscope device for medical use and a connector part (for example, The present invention relates to a composite product manufacturing mold and a composite product manufacturing method for manufacturing a composite product in which a preliminarily molded casing component) is joined and an elastic material for sealing is coated at the joint portion.

  In general, a medical endoscope is configured to have an elongated insertion portion that is inserted into a body cavity and an operation portion or a connection portion that is connected to a proximal end side of the insertion portion.

  The insertion portion is composed of, for example, an elongated and flexible flexible tube portion, a bending portion disposed on the distal end side of the flexible tube portion, and a distal end rigid portion disposed on the distal end side of the bending portion. It is common to be done. In an electronic endoscope, an imaging element or the like for imaging a subject is usually provided at the distal rigid portion. In an ultrasonic endoscope, an affected part is ultrasonically observed at the distal rigid portion. An acoustic element such as an ultrasonic probe is provided.

  Such an image sensor or acoustic element is connected to the tip of a wiring in a cable that transmits a signal. The wiring in the cable passes through the inside of the bending portion, the flexible tube portion, and the operation portion, and is connected to the base. In general, the end is connected to a connector or the like for connection with an image processing apparatus or an ultrasonic control apparatus.

  As described above, a medical endoscope or an endoscope product cable that is an intermediate product includes, for example, a cable covered with an elastic body such as silicone rubber, and a connector component that functions as a terminal or intermediate connector. Is connected to a medical endoscope or endoscope device cable having such a structure, for example, when steam sterilization is performed in a high-temperature and high-pressure atmosphere, the cable and connector parts are It is required to have a configuration that is designed so that steam does not enter from the connected connection site and damage the endoscope device.

JP 2007-245399 A Japanese Patent Laid-Open No. 10-180802

  In order to meet such demands, one part of a general molding technique is applied to the connection site where the cable and the connector part are connected after the connector part and a part of the cable are installed (inserted) in the mold. Attempts have been made to integrally form the cover by injection molding by injection, but the cable inserted in advance has been bent or distorted by the pressure during injection molding, or the cable that has been distorted from the cover. It may jump out and become exposed, causing the occurrence of product defects.

  The present invention has been devised based on such a situation. The purpose of the present invention is not only that the parts made of different materials are well integrated and coupled, but also the cable part at the joint between the connector part and the cable. An object of the present invention is to provide a mold for manufacturing a composite product and a method for manufacturing the composite product that can form a covering portion with distortion as much as possible.

  In addition, although the said patent document 1 considered to have a connection with this application discloses the integral molding of a dissimilar material, it does not disclose the subject of this application, a metal mold | die structure, etc. especially. Moreover, although the said patent document 2 is disclosing the technique of inserting the protrusion for fixing in a catheter tube so that a tube may not be distorted, it is related with the technique which considered the balance of the injection pressure at the time of injection molding. is not.

In order to solve the above-described problems, the present invention includes a connector part, a cable part connected to the connector part, and a covering that covers a periphery of a joint part including a joint part between the connector part and the cable part. A mold for manufacturing a composite product for manufacturing a composite product, the mold including an insert space in which a part of the connector part and the cable part can be inserted into the mold, and the covering body. A gate having an upper mold and a lower mold that can be combined with a cavity that is a space for injecting a molding material to be formed to form a covering, and for injecting the molding material into the cavity Is a plurality of film gates arranged so as to extend along the longitudinal direction of the covering, and the plurality of film gates are perpendicular to the longitudinal direction of the covering. When viewed in cross section, are located at equal angle split, wherein the upper die, the spool hole, through the runner hole and a film gate position, the end of the runner hole which connects the film gate on the A combination of a runner groove portion having a triangular cross section located in each of the mold and the lower mold causes a runner portion having a quadrangular cross section to be positioned along the longitudinal direction of the covering, and a substantial corner of the runner portion having a quadrangular cross section. The runner hole is connected to the terminal end of the spool hole, and has a substantially plate-like runner groove portion that is positioned along the longitudinal direction of the cover body at a substantially constant distance. The runner groove portion is disposed closer to the cover than the substantially plate-like runner groove portion, and has a triangular cross-section with the cover body and being arranged along the longitudinal direction of the cover body with a substantially constant interval. and so it is It is made.

  As a more preferred embodiment of the mold for producing a composite product of the present invention, the film gate is a pair of film gates arranged at an equal angular division of 180 degrees, and is arranged at a position facing each other across the cavity. The

  As a more preferred embodiment of the mold for producing a composite product of the present invention, the pair of film gates are formed along a parting line of the upper mold.

  Further, as a more preferable aspect of the mold for producing a composite product of the present invention, the lower mold includes a combination of the connector part and the cable part arranged in the insert space, and a cable from the rear end of the connector part. A pressing mechanism for biasing toward the component side (cable component tip side) is provided.

The present invention is a method of manufacturing a connector part, a cable part connected to the connector part, and a composite product having a covering covering a periphery of a joint part including a joint part of the connector part and the cable part. Then, one of the above-described molds is prepared, and a part of the connector part and the cable part are inserted in the insert space of the mold, and then extended along the longitudinal direction of the covering body. A coating material is formed by injecting a molding material into a cavity from a plurality of film gates arranged at equal angular intervals.

  As a more preferred embodiment of the method for producing a composite product of the present invention, the molding material injected into the cavity is configured to be a liquid silicone rubber.

  Moreover, as a more preferable aspect of the method for manufacturing a composite product of the present invention, the connector part is formed of a metal material or a resin material, and the outer surface of the cable part is formed of a coated silicone rubber.

  A mold for producing a composite product according to the present invention is a composite having a connector part, a cable part connected to the connector part, and a covering that covers the periphery of the joint part including the joint part of the connector part and the cable part. A mold for manufacturing a product, wherein the mold includes an insert space in which a part of the connector part and the cable part can be inserted into the mold, and a molding material for forming the covering body. A gate for injecting a molding material into the cavity has an upper mold and a lower mold that can be combined with a cavity that is a space for injecting and forming a cover. When a plurality of film gates are arranged so as to extend along the longitudinal direction, and the plurality of film gates are viewed in a cross section perpendicular to the longitudinal direction of the covering, Because it is arranged at an angle split, as much as possible the distortion of the cable can form a coating material in a state of being reduced at the junction between the connector component and the cable, thereby improving the product yield.

FIG. 1 is a half-sectional view showing a state in which a connector part and a cable part connected to this connector part are combined, and corresponds to a state in which these combination members are inserted in a composite product manufacturing mold. It is a drawing. FIG. 2 is a half-sectional view showing a state in which the periphery of the joint including the joint between the connector part and the cable part is covered with a cover after the connector part and the cable part connected to the connector part are combined. It is drawing equivalent to an example of the composite product which is a molding object. FIG. 3 is a plan view of a mold formed by sequentially combining and laminating a lower mold, an upper mold, and a pressing mold. The drawing shows a predetermined plane inside the mold with a solid line so that the structure inside the mold can be easily understood. Especially, a part of connector parts and cable parts are inserted into the mold. Insert space, a cavity that is a space for injecting molding material to form a cover, and a connector part and a cable part inserted in the insert space are energized and temporarily fixed. A pressing mechanism for doing this is shown. The upper surface on which the cavity of the lower mold is formed, or the lower surface on which the cavity of the upper mold is formed is a drawing mainly drawn by a solid line. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a side view seen from the α-α direction in FIG. 3. 6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a plan view showing the insert space, the cavity, and the vicinity of the gate arranged around the cavity in FIG. 8 is a cross-sectional view taken along line FF in FIG. 9 is a cross-sectional view taken along the line CC in FIG. FIG. 10 (A) is a schematic perspective view showing a state of a covering formed through a pair of film gates G1 and G2 arranged at an equal angle of 180 degrees, and FIG. 10 (B) is a covering. FIG. 10C is a cross-sectional view viewed in a vertical cross section with respect to the longitudinal direction of FIG. 6, and FIG. 10C is a modification of FIG.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the form demonstrated below, In the range which does not deviate from a technical thought, it can implement in various deformation | transformation. In the accompanying drawings, the vertical and horizontal scales may be exaggerated for the sake of explanation, and the actual scales may differ.

<Explanation of composite products to be molded and manufactured>
Before describing the mold for manufacturing a composite product and the method for manufacturing the composite product in the present invention, the composite product to be molded or manufactured will be described with reference to FIG.

  FIG. 2 shows the periphery of the joint including the joint part 5 between the connector part 2 and the cable part 4 after the connector part 2 and the cable part 4 which is a linear cable connected to the connector part 2 are combined. FIG. 5 is a half-sectional view showing a state of being covered with a covering body 6 and corresponding to an example of a composite product 1 to be molded or manufactured. That is, the composite product 1 is configured as a product formed by integrating and joining members of different materials as shown in FIG.

  The connector component 2 in the embodiment shown in FIG. 2 protrudes having a substantially cylindrical housing base 21 and an inner diameter similar to that of the linear cable 4a of the cable component 4 connected to the housing base 21. A connecting portion 22 is provided.

  An end outer diameter φD1 of the substantially cylindrical housing base 21 is, for example, about 10 to 50 mm, and an end outer diameter φD2 of the connecting portion 22 is, for example, about 5 to 20 mm. The length L in the direction (axial direction) is, for example, about 15 to 50 mm. However, these dimensions are merely examples of the preferred range of dimensions, and are not particularly limited to these numerical ranges.

  The connector part 2 can be composed of a resin material or a metal material, and the constituent material is not particularly limited. For example, for use where lightness and heat resistance are required, short-term heat resistance is required. A so-called heat resistant resin having the characteristics of 200 ° C. or higher and long-term heat resistance of 150 ° C. or higher is preferable. Examples of such heat-resistant resins include polyphenylene sulfide (PPS), polyarylate (PAR), polysulfone (PSF), polyethersulfone (PES), polyetherimide (PEI), polyamideimide (PAI), and polyetherether. Examples thereof include ketone (PEEK) and liquid crystal polyester (LCP).

  The cable component 4 includes a cable 4a in which a plurality of communication fibers and conductive connection lines are accommodated on the inner side and the outer periphery thereof is covered with a protective film. In the example of FIG. In the vicinity, the communication fiber and the connection line housed in the cable 4a are individually separated and drawn out as each line 4b so as to be connected to a desired device. However, the present invention is not necessarily limited to this mode. Various embodiments are possible.

The protective film coated on the outermost part of the cable 4a is, for example, a rubber material such as silicone rubber, fluorine rubber, fluorosilicone rubber, polytetrafluoroethylene (PTFE), 4-fluoroethylene-perchloroalkoxy copolymer. It is formed from a resin material such as coalescence (PFT).
Particularly for use in the medical field, silicone rubber having excellent functions such as heat resistance and biocompatibility is preferably used as a cable coating material.

  The outer diameter φD3 of the cable component 4 (cable 4a) is, for example, about 4 to 18 mm, and the total length is, for example, about 1 to 3 m. However, these dimensions are merely examples of the preferred range of dimensions, and are not particularly limited to these numerical ranges.

  As shown in FIG. 2, the covering 6 is formed so as to cover the periphery of the joint including the joint 5 between the connector part 2 and the cable part 4. That is, the covering 6 in the embodiment of the present invention is formed so as to completely cover the connecting portion 22 protruding from one end of the housing base 21 and to cover a part of the cable 4 a including the joint portion 5. . Incidentally, FIG. 1 is a half-sectional view showing a state before the covering 6 is formed, that is, a state in which the connector part 2 and the cable part 4 connected to the connector part 2 are combined, and will be described later. It is drawing equivalent to the state which inserted these combination members in the metal mold | die for manufacture. In other words, the combination member is inserted into the mold in the state shown in FIG. 1, and the molding 6 is formed as shown in FIG. 2 by injecting the molding material for forming the coating 6 into the cavity. Product 1 is manufactured.

  As a material constituting the covering 6, a rubber material or a resin material that is excellent in the adhesiveness between the connector part 2 and the cable part 4 and excellent in the sealing property is suitable. Among these, it is particularly preferable to use rubber materials such as silicone rubber, fluorine rubber, butyl rubber, and butadiene rubber that are excellent in heat resistance.

<Explanation of molds for manufacturing composite products>
A composite product manufacturing mold for molding the composite product described above will be described with reference to FIGS.

  FIG. 3 is a plan view of a mold formed by sequentially combining and laminating a lower mold, an upper mold, and a pressing mold. In the drawing, a predetermined plane inside the mold is drawn with a solid line so that the structure inside the mold can be easily understood. In particular, a part of the connector part and the cable part are inserted into the mold. Insert space, a cavity that is a space for injecting a molding material for forming a covering body to form a covering body, and a connector part and a cable part inserted in the insert space to be biased temporarily A pressing mechanism for fixing is shown. It is a drawing in which the upper surface on which the cavity of the lower mold is formed or the lower surface on which the cavity of the upper mold is formed is drawn with a solid line, and the specific internal configuration is different from that of the other drawings. I want you to consider while combining. 4 is a cross-sectional view taken along line BB in FIG. 3, FIG. 5 is a side view seen from the α-α direction in FIG. 3, and FIG. 6 is a cross-sectional view taken along line AA in FIG. 7 is a plan view showing the insert space, the cavity, and the vicinity of the gate arranged around the cavity in FIG. 3, and FIG. 8 is a cross-sectional view taken along the line FF in FIG. 9 is a cross-sectional view taken along the line CC in FIG.

  As shown in FIGS. 4 and 5, the composite product manufacturing mold 100 of the present invention has an upper mold 70 and a lower mold 50, and the upper mold 70 and the lower mold 50 are divided into parties. By combining them so as to be matched with each other at the line PL, an insert space 30 (see FIG. 4) in which a part of the connector part 2 and the cable part 4 can be inserted into the mold is formed, and the covering body 6 is formed. A cavity 40 (see FIG. 4), which is a space for injecting a molding material to form a covering, can be formed.

  And the principal part of this invention is the some arrange | positioned so that the gate for inject | pouring a molding material into the cavity 40 may be extended along the longitudinal direction (same as the central-axis direction of a molded article) of the coating | coated body 6. When the film gates are viewed in a vertical cross section with respect to the longitudinal direction of the covering 6, the film gates are arranged at an equal angle.

  The film gates in the illustrated embodiment are a pair of film gates G1 and G2 that are equally divided by 180 degrees as shown in FIG. 3, and are arranged at positions facing each other with the cavity 40 in between. More specifically, the pair of film gates G1 and G2 are formed along the parting line of the upper mold 70. The description is shown in a schematic perspective view of a state of a covering formed through a pair of film gates G1 and G2 arranged at an equal angle of 180 degrees shown in FIG. 10A and FIG. 10B. It will be easier to understand by referring to a cross-sectional view viewed in a vertical cross section with respect to the longitudinal direction of the covering 6 to be obtained.

  Further, a description will be added by paying attention to the film gate G1 on one side of the pair of film gates G1 and G2 shown in FIG. The other film gate G2 has a mirror image relationship with respect to the center line S (see FIG. 8) of the cavity 40, and thus the description thereof is omitted. As shown in FIG. 8, a film gate G <b> 1 is formed in the upper mold 70 through a spool hole 71 and a runner hole 72. Further, as shown in FIG. 9 in which the main part is enlarged, the end of the runner hole 72 connected to the film gate G1 is formed in a parting line PL which is a joint surface between the upper mold 70 and the lower mold 50, respectively. A runner portion 72 ′ having a square cross section is formed by a combination of the runner groove portions 72 a and 72 b having a triangular cross section. A film gate G1 is formed to be connected to a substantial corner 72c of the runner portion 72 ′ having a quadrangular cross section.

  The runner hole 72 formed in the upper mold 70 is connected to the terminal end 71a of the spool hole 71 as shown in FIG. 9, and is arranged along the longitudinal direction of the covering body with a substantially constant distance from the covering body. The substantially plate-like runner groove portion 72d and the substantially plate-like runner groove portion 72d are arranged closer to the covering body than the substantially plate-like runner groove portion 72d, and are arranged along the longitudinal direction of the covering body with a substantially constant distance from the covering body. And a runner groove portion 72a having a triangular cross section.

  As described above, a structure similar to the structure shown in FIG. 9 is formed on the right side of FIG. 9 so as to have a mirror image centered on the center line S (see FIG. 8) of the cavity 40, and the other Note that the film gate G2 is formed (see the configuration in the vicinity of the film gates G1 and G2 shown in FIGS. 3 and 7).

  Further, as shown in FIG. 3 and FIG. 4, the lower mold 50 has a combination of the connector part 2 and the cable part 4 arranged in the insert space 30 with a rear end 29 (see FIG. It is preferable to provide a pressing mechanism portion 80 that can be biased toward the cable component 4 side.

  As shown in FIG. 4, the pressing mechanism portion 80 has a combination of a housing portion 82 and a spring guide member 81 and a guide pusher member 83 arranged so as to pass through the inside of the housing portion 82. A spring member 84 is interposed between the guide member 81 and the housing portion 82, and a spring member 85 is interposed between the spring guide member 81 and the guide pusher member 83, whereby the spring guide member 81 and the guide pusher member are interposed. The combination body with 83 has a pressing action in the longitudinal direction and can be expanded and contracted by a certain distance by a reaction. Therefore, positioning and fixing of the combination of the connector part 2 and the cable part 4 arranged in the insert space 30 is facilitated. Note that a guide plate 91, which will be described later, also works cooperatively in this positioning and fixing.

  A pressing die 90 is combined and formed on the upper die 70.

As shown in FIGS. 3 and 4, a pot 75 formed in a concave shape for temporarily storing the molding material to be injected into the cavity 40 is formed on the upper surface side of the upper mold 70. ing. A spool hole 71 is formed on the lower surface of the pot 75 toward the inside of the cavity 40.
A convex-shaped pressing piston portion 95 is formed on the lower surface of the pressing die 90, and by pressing the molding material stored in the pot 75 while the pressing piston portion 95 is fitted into the pot 75, The molding material can pass through the spool hole, the runner hole, and the film gate sequentially and can be injected into the cavity 40 (in FIG. 4, the upper mold 70 and the pressing mold 90 are in close contact with each other, and the injection completed state is shown. It is shown).

  Further, guide plates 91 and 92 are attached to both side surfaces in the longitudinal direction of the pressing die 90 so as to hang down. One guide plate 91 acts so that the stacked molds can be fixed so as to be clamped from the side, and the connector part 2 is brought into contact with the top 81a of the spring guide member 81 of the pressing mechanism 80. The connector part 2 is urged from the rear end toward the cable part 4 so that the connector part 2 can be reliably positioned. The other opposing guide plate 92 acts to fix the stacked molds so as to be sandwiched from the side surfaces. The other guide plate 92 has a notch 92a (see FIG. 5) for allowing the long cable component 4 to escape.

  The above-described embodiment has been described by taking as an example the case of including a pair of film gates G1 and G2 arranged at an equal angle of 180 degrees. For example, as shown in FIG. Two pairs of film gates G1 and G2; G3 and G4 that are equally divided at a degree can also be used. In this case, although the mold structure is complicated, the operational effects of the present invention can be further improved. In addition, it is also possible to make an equal angle division arrangement of 120 degrees.

<Description of manufacturing method for composite products>
Next, a method for manufacturing a composite product will be described.

  The method of manufacturing a composite product according to the present invention includes a covering that covers the periphery of a joint part including a connector part 2, a cable part 4 connected to the connector part 2, and a joint part 5 between the connector part 2 and the cable part 4. 6 is a method of manufacturing a composite product having an insert space 30 into which a part of the connector part 2 and the cable part 4 can be inserted into the mold 1 and a molding material for forming the covering 6. Then, a mold 1 that can be formed in combination with a cavity 40 that is a space for forming a covering is prepared, and a part of the connector part 2 and the cable part 4 are inserted into the insert space 30 of the mold. Next, the cavity 40 is formed from a plurality of film gates arranged at equal angular intervals arranged so as to extend along the longitudinal direction of the covering 6. Charge by injecting configured to form a covering body 6. As a preferred example, the number of film gates is set to 2, and the molding material is injected into the cavity 40 in a state where the film gates are opposed to each other at an equal angle of 180 degrees. As a result, the covering body can be formed in a state in which the distortion of the cable at the joint between the connector part and the cable is reduced as much as possible, and the product yield can be improved.

  In addition, in order to take out a molded product after shaping | molding, the upper metal mold | die 70 and the lower metal mold | die 50 open up and down from the part of the parting line PL shown by FIG. At this time, the molded product after molding was cut in the vicinity of the tip E of the spool in FIG. 8, and the spool portion adhered to the upper mold 70 and the molded portion including other products adhered to the lower mold 50, respectively. It becomes a state. Thereafter, the molded part adhering to the lower mold 50 is taken out, and the product and the unwanted material are separated from the location of the gate.

  The molding material injected into the cavity is preferably liquid silicone rubber. Thereby, the viscosity of the molding material flowing in the mold can be lowered, the force applied to the cable inserted in advance is considerably reduced, and the effect of the present invention can be further enhanced. In addition, the connector parts are made of a metal material or resin material (particularly preferably heat-resistant resin), and the outer surface of the cable parts is made of silicone rubber coated so that the members are integrated and connected. It is possible to increase the bonding strength at the time.

  As described above, according to the composite product manufacturing mold and the composite product manufacturing method configured as described above, when several film gates are viewed in a vertical cross section with respect to the longitudinal direction of the covering, a uniform angle is obtained. Since they are arranged in a split manner, it is possible to form the covering in a state in which the distortion of the cable at the joint between the connector part and the cable is reduced as much as possible, and to improve the product yield.

  It can be used in industries such as inspection equipment equipped with cables for medical use or various industries.

DESCRIPTION OF SYMBOLS 2 ... Connector part 4 ... Cable part 5 ... Joining part 6 ... Covering body 30 ... Insert space 40 ... Cavity G1, G2 (G3, G4) ... Film gate

Claims (7)

For manufacturing a composite product for manufacturing a connector product, a cable product connected to the connector component, and a composite product that covers a periphery of a joint including a joint between the connector component and the cable component Mold,
The mold is an insert space in which a part of the connector part and the cable part can be inserted into the mold, and a space for injecting a molding material for forming the cover to form a cover. Having an upper mold and a lower mold that can be formed in combination with the cavity;
The gate for injecting the molding material into the cavity is a plurality of film gates arranged so as to extend along the longitudinal direction of the covering, and the plurality of film gates are arranged in the longitudinal direction of the covering. When viewed in a cross section perpendicular to the direction , it is located at an equal angle
A film gate is located in the upper mold via a spool hole and a runner hole, and the end of the runner hole connected to the film gate has a triangular cross section located in the upper mold and the lower mold, respectively. The runner portion having a quadrangular cross section is positioned along the longitudinal direction of the covering body by the combination of the runner groove portions, and the film gate is positioned at the substantial corner of the runner portion having the quadrangular cross section,
The runner hole is connected to the terminal end of the spool hole, and has a substantially plate-like runner groove portion that is positioned along the longitudinal direction of the cover body at a substantially constant distance from the cover body, and covers the runner hole more than the substantially plate-like runner groove portion. For manufacturing a composite product, characterized in that it has a runner groove portion having a triangular shape in cross section, which is disposed on the side close to the body and is disposed along the longitudinal direction of the covering body with a substantially constant distance from the covering body . Mold.   2. The mold for manufacturing a composite product according to claim 1, wherein the film gates are a pair of film gates arranged at an equal angle of 180 degrees and are arranged at positions facing each other with a cavity interposed therebetween. The pair of film gate, the composite product manufacturing mold of claim 2 you located along the upper mold parting lines. The lower mold has a pressing mechanism for urging the combination of the connector part and the cable part arranged in the insert space from the rear end of the connector part to the cable part side (cable part front side). A mold for producing a composite product according to any one of claims 1 to 3 , which is provided. A method of manufacturing a connector product, a cable component connected to the connector component, and a composite product having a covering covering a periphery of a joint portion including a joint portion between the connector component and the cable component,
A mold according to any one of claims 1 to 4 is prepared,
Insert a part of the connector part and cable part in the insert space of the mold,
Next, a covering material is formed by injecting a molding material into a cavity from a plurality of film gates arranged at equal angular intervals arranged so as to extend along the longitudinal direction of the covering material. A method for producing a featured composite product.   The method for producing a composite product according to claim 5, wherein the molding material injected into the cavity is liquid silicone rubber.   The method of manufacturing a composite product according to claim 5 or 6, wherein the connector part is formed of a metal material or a resin material, and is formed of a silicone rubber coated on an outer surface of the cable part.

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