JP5274178B2 - Connector mold, connector manufacturing method, and connector - Google Patents

Description

  The present invention relates to a connector molding die, a connector manufacturing method for manufacturing a connector using the molding die, and a connector manufactured by the connector manufacturing method.

  Many connectors are used in automobiles and the like. As one of the connectors, there is a joint connector for multiplex communication used when a plurality of terminal communication devices are branched and connected to an in-vehicle multiplex communication bus line. It is known (for example, refer to Patent Document 1). This joint connector has a plurality of terminals that are electrically connected in alignment with the bus bar, and a capacitor is electrically connected to one end of the bus bar for noise removal or the like. It is housed in. As described above, since the capacitor is accommodated in the housing, there is a problem that the joint connector cannot be reduced in size.

  In order to solve such a problem, it has been proposed to substitute a magnetic substance ferrite instead of a capacitor. As the ferrite, one having an elongated rectangular flat plate shape in which a plurality of holes each penetrating a plurality of terminals is formed. Since ferrite is very brittle, it is vulnerable to impact, and if the outer periphery is surrounded by a resin housing, the strength against impact can be increased, and as a result, the joint connector can be downsized.

  This joint connector is manufactured by using, for example, a pair of upper and lower molds which are molds. The joint connector manufacturing procedure is as follows. First, a plurality of terminals connected to the bus bar are inserted through the ferrite holes, respectively, and the terminals are inserted into the lower terminal insertion holes to position the terminals. At the same time, the positioning of the ferrite in the axial direction and the alignment direction of the terminals is performed by the positioning part having the L-shaped cross section of the lower mold, and after the positioning, the upper mold is clamped to the lower mold and the resin is injected from the runner. Thus, the housing is insert-molded on the outer periphery of the ferrite and bus bar.

JP 2003-123919 A

  By the way, the positioning of the ferrite in the terminal alignment direction is performed by bringing both end faces of the ferrite into contact with the wall surface rising in the direction perpendicular to the bottom of the two L-shaped positioning portions of the molding die, so that resin is injected from the runner. Then, the ferrite is pressed by the injection pressure of the resin and pressed against the wall surface of one positioning portion. At this time, if the resin injection pressure is high, the pressing force is large, so that very brittle ferrite may be damaged. Further, after the housing is insert-molded, when the connector, which is a molded product, is released from the mold, the ferrite is damaged by the frictional force (adhesion force) generated between the wall surface of the positioning portion and the ferrite end surface. There is also a fear.

  The problem to be solved by the present invention is to mold the housing without damaging the magnetic material.

  In order to solve the above problems, the present invention provides a plurality of terminals that are electrically connected in alignment with a bus bar, a magnetic body having a plurality of holes through which the plurality of terminals pass, and a terminal that passes through the magnetic body. A molding die that inserts a housing that encloses the bus bar and the magnetic body and forms a partition wall of the terminal accommodation portion with resin, A plurality of convex portions formed in alignment corresponding to the terminal accommodating portions, insertion holes for positioning terminals provided at the tips of the convex portions, respectively, and the terminals at both ends in the alignment direction A mounting portion that is provided at each end of the convex portion and on which both ends of the magnetic body are mounted to position the magnetic body in the axial direction of the terminal; and both end sides of the magnetic body in the alignment direction of the terminal Has runner for resin injection opened in A mold having a wall portion.

  According to the present invention, since there are two runners opened on both ends of the magnetic body in the terminal alignment direction, the resin from the two runners is directed from both ends of the magnetic body to the opposite ends. Since each flows, the magnetic body hardly moves in the terminal arrangement direction due to the injection pressure of the resin. For this reason, since it is not necessary to provide a projection for positioning the terminals in the arrangement direction, the magnetic body is not damaged at the time of resin injection. In addition, since friction does not occur between the placing portion and the end face of the magnetic body at the time of mold release, the ferrite is not damaged at the time of mold release. Therefore, the housing can be molded without damaging the magnetic body.

  In addition, a protrusion for abutting one end face perpendicular to the alignment direction of the magnetic body terminals and positioning the magnetic body terminals in the alignment direction is provided on any one of the mounting portions on which the magnetic body is mounted. Can do.

  In the method of manufacturing a connector according to the present invention, using the molding die, a plurality of terminals that are aligned and electrically connected to the bus bar are passed through the holes of the magnetic body, and the terminals that are penetrated by the magnetic body are provided. Position the terminal by inserting each into the insertion hole of the convex part, and place both ends of the magnetic body on the mounting part to position the magnetic body in the axial direction of the terminal. A connector can be manufactured by injecting resin from two runners on both ends to insert-mold the housing.

  Further, the connector manufacturing method of the present invention uses the molding die described above to pass a plurality of terminals that are aligned and electrically connected to the bus bar through the magnetic body, and the terminals that are penetrated by the magnetic body. Position the terminal by inserting it into the insertion hole of the convex part, place both ends of the magnetic body on the mounting part, and bring one end face of the magnetic body into contact with the protrusions and align the axial direction of the terminal After the positioning, the resin injection from the two runners on both ends of the magnetic body is made so that the resin injection pressure from the runner on the projection side is higher than the resin injection pressure from the other runner. The connector can be manufactured by insert molding the housing.

In the connector of the present invention, a plurality of terminals that are electrically connected in alignment with the bus bar, a magnetic body having a plurality of holes through which the plurality of terminals pass, and a terminal that penetrates the magnetic body are projected. A plurality of terminal accommodating portions, and a housing formed by enclosing and molding the bus bar and the magnetic body with resin , both ends of the magnetic body facing the terminal accommodating portion The housing is formed by injecting the resin from both ends of the magnetic body in the terminal alignment direction . Further, the housing has a configuration in which a part of one end surface of the magnetic body facing the terminal alignment direction is exposed.

  According to the present invention, the housing can be molded without damaging the magnetic body.

  Hereinafter, this embodiment is explained in full detail based on an accompanying drawing.

  FIG. 1 shows a cross-sectional view of a mold according to an embodiment of the present invention. FIG. 2 is a view of a connector having a housing molded using the molding die of one embodiment according to the present invention, wherein (a) and (b) are perspective views, (c) is a bottom view, and (d) is ( c) A cross-sectional view taken along line AA in the figure. FIG. 3 shows a perspective view of a terminal used in a connector having a housing molded using the molding die according to one embodiment of the present invention. FIG. 4 shows a perspective view of a magnetic body used in a connector having a housing molded using the molding die according to one embodiment of the present invention.

  The mold according to this embodiment includes a plurality of terminals that are electrically connected in alignment with the bus bar, a magnetic body having a plurality of holes through which the plurality of terminals penetrate, and a plurality of terminals through which the terminals that penetrate the magnetic body protrude. A housing that surrounds the bus bar and the magnetic body and forms a partition wall of the terminal housing portion is insert-molded with resin. An example of a connector having a housing molded using the molding die of this embodiment is a joint connector 10 for multiplex communication shown in FIG.

  As shown in FIG. 2, the joint connector 10 is used when a plurality of terminal communication devices are branched and connected to a bus line for in-vehicle multiplex communication. The joint connector 10 surrounds the plurality of terminals 11 aligned and electrically connected to the bus bar 12, the magnetic body having the plurality of holes 15 through which the plurality of terminals 11 pass, the magnetic body and the bus bar 12, And the housing 16 which has the some terminal accommodating part 17 from which the terminal 11 which penetrated the magnetic body protrudes is provided.

  As shown in FIG. 2D and FIG. 3, a plurality of, for example, eight terminals 11 are provided. Note that the number of the terminals 11 is not limited to eight and may be other numbers. The bus bar 12 is formed in a linear shape. A linear terminal 11 is integrally connected to the bus bar 12 in a state in which the linear terminals 11 are aligned at a predetermined interval in a direction orthogonal to the bus bar 12. That is, the terminal 11 and the bus bar 12 are integrally formed in a substantially comb shape, for example, by die cutting of a metal plate that is a conductive material. Two such integrally formed terminal groups 13 are used, for example. The terminals 11 of the two terminal groups 13 are penetrated by one magnetic body. As the magnetic body, as shown in FIGS. 2D and 4, it is preferable to use a ferrite body 14 in which a ferrite is formed into an elongated rectangular flat plate shape. In the ferrite body 14, eight through holes that allow the eight terminals 11 of the terminal group 13 to pass therethrough are provided in two rows at predetermined intervals. That is, the ferrite body 14 has a total of 16 terminals 11 penetrating through the holes 15 with the two terminal groups 13 facing each other, and the housing 16 is formed on the outer periphery of the ferrite body 14 and the bus bar 12. Molded.

  The housing 16 is a connector body, and as shown in FIG. 2, has a plurality of aligned terminal accommodating portions 17 partitioned by a plurality of, for example, partition walls 16a into which the mating connector is inserted. In each terminal accommodating portion 17, two opposing terminals 11 of the terminal group 13 penetrating the ferrite body 14 are respectively projected. In the wall portion on the outer periphery of the housing 16 forming the terminal accommodating portion 17 and corresponding to each terminal accommodating portion 17, the mating connector is engaged with the mating connector inserted in each terminal accommodating portion 17 and the terminal connector is accommodated in the terminal accommodating portion 17. A connector engaging portion 18 for preventing the portion 17 from coming off is provided. Further, an engagement holding portion 19 that engages and holds the joint connector 1 of the present embodiment is provided on the wall portion of the housing 16 opposite to the connector engagement portion 18. The housing 16 is formed by insert molding using the molding die 1 of this embodiment shown in FIG. 1, for example.

  As shown in FIG. 1, the mold 1 of the present embodiment includes, for example, an upper mold 2 and a lower mold 3 that are divided into upper and lower parts. The molding die 1 is a cavity 4 for molding a housing 16 having a predetermined shape on the outer periphery with the ferrite body 14 and the bus bar 12 held inside by clamping the upper die 2 and the lower die 3. Is formed. The housing 16 is molded by the resin injected into the cavity 4. The resin is not particularly limited as long as it is injected into the cavity 4 and molded to mold the housing 16. For example, a thermosetting insulating resin or a thermoplastic insulating resin is used.

  Mold recesses 2a and 3a for forming a cavity 4 are formed on the mold surfaces of the upper mold 2 and the lower mold 3 facing each other. In the mold recess 3 a of the lower mold 3, a plurality of, for example, eight convex mold parts 5 are projected in alignment with the terminal accommodating part 17. The cavity 4 between the convex mold parts 5 is a place where the partition wall of the terminal accommodating part 17 is formed. Each convex part 5 is formed in a quadrangular prism. Insertion holes 6 for two terminals 11 are provided on the tip surface of each convex portion 5. The 16 insertion holes 6 in total are provided at locations corresponding to the 16 terminals 11 that penetrate the ferrite body 14. The insertion hole 6 holds the terminal 11 and positions the terminal 11 with respect to the terminal accommodating portion 17 by inserting the terminal 11.

  At the tips of the convex portions 5 at both ends in the alignment direction, mounting portions 7 on which both ends of the ferrite body 14 are mounted are provided so as to protrude. The mounting portion 7 holds the ferrite body 14 and positions the ferrite body 14 in the axial direction of the terminal 11. For example, the protrusion on which the portion on which the ferrite body 14 is placed is formed in a planar shape. It is formed as. The mounting portion 7 is provided at the tip of the convex portion 5 and extending in the alignment direction from the end of the ferrite body 14 on the end side in the alignment direction. That is, the wall portion of the convex portion 5 opposite to the side adjacent to each other has a substantially central portion protruding from the wall surface in order to form the placement portion 7. Moreover, although the mounting part 7 is provided in a part of convex part 5 of the direction orthogonal to the alignment direction of the terminal 11, for example, the substantially center part, it is not limited to this. On either one of the mounting portions 7, there is a protrusion 8 that contacts the end face of one ferrite body 14 (a surface orthogonal to the alignment direction of the terminals 11) and positions the ferrite body 14 in the alignment direction of the terminals 11. Is provided. The protrusion 8 may be formed in any way as long as the ferrite body 14 can be positioned.

  The mold recess 2 a of the upper mold 2 is provided with a protrusion 2 b that forms a recess on the opposite side of the housing 16 from the terminal accommodating portion 17. The wall portion of the upper mold 2 is provided with two runners 9 for injecting a resin having a gate 9a opened in the mold recess. The two runners 9 are formed on the wall 2c on the side facing both ends of the ferrite body 14 placed on the placement part 7 of the lower mold 3 and where the gate 9a faces the convex part 2b. The resin is injected into the cavity 4 in the alignment direction of the terminals 11 which is the longitudinal direction of the ferrite body 14.

  Next, the case where the joint connector 10 is manufactured using the shaping | molding die 1 of this embodiment is demonstrated.

  First, the 16 terminals 11 of the two terminal groups 13 are inserted into the holes 15 of the ferrite body 14 and penetrated. Each terminal 11 through which the ferrite body 14 is penetrated is inserted into the insertion hole 6 of the convex part 5 of the lower mold 3 as shown in FIG. Further, both ends of the ferrite body 14 are mounted on the mounting portion 7 and one end face of the ferrite body 14 is brought into contact with the protrusion 8 so that the ferrite body 14 is in a direction orthogonal to the alignment direction of the terminals 11 and the alignment direction. The ferrite body 14 in the longitudinal direction is positioned.

  After the positioning, the upper die 2 is clamped to the lower die 3 to form a cavity 4 having a predetermined shape between the outer periphery of the bus bar 12 and the ferrite body 14 and the convex portion 5 as shown in FIG. . The molten resin is injected into the cavity 4 from the two runners 9 through the gate 9a. At this time, the injection pressure of the resin from the runner 9 on the side where the projection 8 is provided on the mounting portion 7 is higher than the injection pressure of the resin from the other runner 9, for example, slightly higher. The injected resin spreads into the cavity after hitting the upper convex portion 2b, and gradually flows along the outer circumference of the bus bar 12 and the ferrite body 14 from both ends toward the longitudinal direction of the ferrite body 14, and the convex portion. Also flows in between 5. Then, when the entire cavity 4 is filled with resin, the injection of resin from the runner 9 is stopped.

  As described above, the resin flows into the outer periphery of the ferrite body 14 from the two runners 9 toward the opposite ends from both ends of the ferrite body 14, respectively, so that the resin flows from one end of the ferrite body 14 toward the other end. The force that is pushed from one end of the ferrite body 14 to the other end due to the injection pressure of the ferrite body 14 and the force that is pushed from the other end of the ferrite body 14 toward the one end due to the injection pressure of the resin flowing from the other end of the ferrite body 14 toward the one end. Since they are canceled out, the ferrite body 14 hardly moves in the longitudinal direction. For this reason, even if the ferrite body 14 is pressed by the positioning projection 8, the pressing force is small. In addition, in this embodiment, the resin injection pressure from the runner 9 on the protrusion 8 side is slightly higher than the resin injection pressure from the other runner 9, so the ferrite body 14 is not pressed against the protrusion 8. . Therefore, the ferrite body 14 is not damaged at the time of resin injection.

  And the resin with which the outer periphery etc. of the bus-bar 12 and the ferrite body 14 were solidified, and the housing 16 is shape | molded as shown in FIG.5 (c). After the molding, the upper mold 2 and the lower mold 3 are separated from each other, and then the housing 16 is separated from the lower mold 3, for example, to thereby have eight terminal accommodating portions 17, connector engaging portions 18, and engagement holding portions 19. The joint connector 1 of this embodiment in which the housing 16 is molded is obtained. Thus, when the lower mold 3 is released from the housing 16, the resin injection pressure acts in a direction away from the ferrite body 14, so the adhesion between the ferrite body 14 and the protrusion 8 is small. The frictional force generated between the ferrite body 14 and the protrusion 8 is small, and the ferrite body 14 is not damaged by this frictional force. Therefore, the housing 16 can be molded without damaging the ferrite body 14.

  As shown in FIG. 2D, the joint connector 1 of the present embodiment obtained in this way has a part of both ends of the ferrite body 14 on the side facing the terminal accommodating portion 17 exposed. That is, a portion where the mounting portion 7 is located when forming the housing 16 is formed as a space 21 in a part of the back wall of the terminal accommodating portion 17 at both ends of the housing 16 in the alignment direction. Part of both ends of 14 is exposed. Further, the housing 16 is formed with a cavity 22 in which a part of one end face of the ferrite body 14 is exposed. The cavity 22 is formed by positioning the protrusion 8 when the housing 16 is molded. Further, the inner wall forming the terminal accommodating portions 17 at both ends in the alignment direction of the housing 16 is formed with a concave portion 16b in which a portion where the wall portion of the convex portion 5 protrudes in order to form the placement portion 7 is formed. Has been.

  In the above-described embodiment, the mounting portion 7 and the protrusion 8 are integrally formed on the convex portion 5 of the lower mold 3. However, the present invention is not limited to this, and the convex portion provided with the mounting portion and the protrusion. May be provided in the lower mold so as to be able to advance and retract, or a member having a placement portion and a protrusion may be provided in the lower mold so as to be able to advance and retract. Further, although the protrusion is provided on the placement portion, the present invention is not limited to this, and the protrusion may be provided individually.

  FIG. 6 is a diagram showing another embodiment. In this other embodiment, the difference from the above-described embodiment is that there is no protrusion for positioning the ferrite body 14 in the longitudinal direction, as shown in FIG. Since other configurations are the same as those of the above-described embodiment, the description thereof is omitted. In the case of another embodiment, it is preferable that the injection pressure of the resin from the two runners 9 is the same. As a result, the force that is pressed from one end of the ferrite body 14 to the other end by the injection pressure of the resin flowing from one end of the ferrite body 14 to the other end, and the injection pressure of the resin that flows from the other end of the ferrite body 14 toward the other end. This cancels out the force pushed from the other end of the ferrite body 14 to the other end, so that the ferrite body 14 hardly moves in the longitudinal direction at the time of resin injection. As a result, there is no need to provide a protrusion for positioning the ferrite body 14 in the longitudinal direction, and the ferrite body 14 is not damaged during resin injection. Further, since there is no protrusion that is in close contact with the end face of the ferrite body 14 at the time of mold release, the ferrite body 14 is not damaged at the time of mold release. Therefore, the housing 16 can be molded without damaging the ferrite body 14.

It is sectional drawing of the shaping | molding die of one Embodiment which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure of the connector which has a housing shape | molded using the shaping | molding die of one Embodiment which concerns on this invention, (a) And (b) is a perspective view, (c) is a bottom view, (d) is (c) figure. It is AA sectional view taken on the line. It is a perspective view of the terminal used for the connector which has the housing shape | molded using the shaping | molding die of one Embodiment which concerns on this invention. It is a perspective view of the magnetic body used for the connector which has the housing shape | molded using the shaping | molding die of one Embodiment which concerns on this invention. It is explanatory drawing at the time of manufacturing the connector which has a housing using the shaping | molding die of one Embodiment which concerns on this invention, (a) Sectional drawing which shows the state which inserted the terminal in the lower mold | type, (b) Upper mold | type in a lower mold | type It is sectional drawing which shows the state which closed the mold | die and formed the cavity, (c) It is sectional drawing which shows the state which filled the resin to the cavity and shape | molded the housing. It is sectional drawing of the principal part of the shaping | molding die and connector of other embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold 2 Upper mold 3 Lower mold 5 Convex part 6 Insertion hole 7 Placement part 8 Protrusion 9 Runner 10 Joint connector 11 Terminal 12 Bus bar 14 Ferrite body 16 Housing 17 Terminal accommodating part 21 Space 22 Cavity

Claims (6)

A plurality of terminals electrically connected in alignment with the bus bar, a magnetic body having a plurality of holes through which the plurality of terminals penetrate, and a plurality of terminal accommodating portions from which the terminals penetrating the magnetic body protrude. A molding die that surrounds the bus bar and the magnetic body and insert-molds a housing that forms a partition wall of the terminal accommodating portion with a resin;
A plurality of convex portions formed in alignment corresponding to the terminal accommodating portions, insertion holes for positioning terminals provided at the tips of the convex portions, respectively, and terminals at both ends in the alignment direction A mounting portion provided at each end of the convex portion, on which both ends of the magnetic body are mounted to position the magnetic body in the axial direction of the terminal; and both ends of the magnetic body in the alignment direction of the terminal A connector mold comprising a wall portion having a runner for injecting resin that is opened to the side.   2. The projection according to claim 1, wherein one of the mounting portions is provided with a protrusion that is in contact with one end surface perpendicular to the alignment direction of the terminals of the magnetic body to position the terminals of the magnetic body in the alignment direction. Mold for forming the connector according to 1. A method of manufacturing a connector using the mold according to claim 1,
A plurality of terminals that are aligned and electrically connected to the bus bar are inserted through the holes of the magnetic body, and the terminals through which the magnetic bodies are inserted are inserted into the insertion holes of the convex portion, respectively, and the terminals are positioned. Then, both ends of the magnetic body are mounted on the mounting portion to position the magnetic body in the axial direction of the terminal, and after positioning, resin is injected from two runners on both ends of the magnetic body to insert the housing Manufacturing method of connector to be molded. A method of manufacturing a connector using the mold according to claim 2,
A plurality of terminals that are aligned and electrically connected to the bus bar are passed through the magnetic body, and the terminals through which the magnetic body is passed are inserted into the insertion holes of the convex portion to position the terminals. Both ends of the magnetic body are mounted on the mounting portion, and one end surface of the magnetic body is brought into contact with the protrusion to position the magnetic body in the axial direction and the alignment direction of the terminal. A method of manufacturing a connector in which a housing is insert-molded by injecting resin from a runner at a location with a resin injection pressure from a runner on a projection side being higher than a resin injection pressure from the other runner. A plurality of terminals that are electrically connected in alignment with the bus bar; a magnetic body having a plurality of holes through which the plurality of terminals penetrate; a plurality of terminal accommodating portions from which the terminals that penetrate the magnetic body protrude; A connector comprising a housing formed by surrounding the bus bar and the magnetic body by insert molding with resin ,
A part of both ends of the magnetic body on the side facing the terminal accommodating portion is exposed ,
The housing is a connector formed by injecting the resin from both end sides of the magnetic body in the alignment direction of the terminals .   The connector according to claim 5, wherein the housing has a cavity in which a part of one end face of the magnetic body facing the terminal alignment direction is exposed.

Images