JP2018058237A - Manufacturing method of insert-molded busbar product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To offer a method of manufacturing an insert-molded busbar, enabling inhibition of man-hour increases regardless positions of multiple bus bars.SOLUTION: In this method of manufacturing an insert-molded bus bar, bus bars 2 and 3 make up a connected bus bar product 1 integrated through a resin coated part 4 by injection molding. The method includes: a bus bar making step of making a bus bar connected body 50, in which bus bars 2 and 3 connected through a connection 51, by metal powder injection molding; a setting step of setting the bus bar connected body 50 into a mold 300 for resin molding; a resin molding step of injecting and filling synthetic resin material 330 into the mold 300 for resin molding where the bus bar connected boy 50 is clamped in the state of setting the bus bar connected boy in the mold 300 for resin molding; and thereafter a splitting step of splitting up the connection 51 so that bus bars 2 and 3 are insulated with each other on the bus bar connected body 50 after integrated with the resin coated part 4 through the resin molding step.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing a bus bar resin molded product.

  As a bus bar resin molded product in which a bus bar used as a wiring material is integrated with a synthetic resin material by resin injection molding, for example, there is a joint connector described in Patent Document 1.

  In the joint connector described in Patent Document 1, a plurality of bus bars insulated from each other are integrated through a synthetic resin material by resin injection molding. The specific manufacturing method first manufactures a bus bar base material in which a plurality of bus bars that are insulated from each other are connected via a connecting portion when the joint connector is completed. After this bus bar base material is integrated with the synthetic resin material by resin injection molding, the connecting portion is broken, so that the bus bar base material is divided into a plurality of bus bars insulated from each other. Thereby, a joint connector in which a plurality of bus bars insulated from each other are integrated via the synthetic resin material is completed.

JP 2000-331750 A

  The joint connector described in Patent Document 1 is arranged such that a plurality of bus bars made of flat tab pieces are arranged in parallel. In this case, the bus bar base material can be grasped in a two-dimensional manner in which a plurality of tab pieces protrude in a cantilevered manner from the side edge of a single connecting portion having a strip shape, and these tab pieces are arranged in parallel. It can be said that it is a simple structure. The bus bar base material having such a simple configuration is manufactured by using a relatively simple processing method among metal material processing methods such as press processing.

  On the other hand, when a plurality of bus bars are arranged three-dimensionally, which must be grasped three-dimensionally, it becomes difficult to manufacture a bus bar base material in which a plurality of bus bars are connected by pressing or the like. In this case, a plurality of bus bars must be manufactured individually. Then, when integrating a plurality of individually manufactured bus bars with a synthetic resin material by resin injection molding, a plurality of individually manufactured bus bars are sequentially arranged in the mold used for the resin injection molding. There is a concern that the number of work man-hours will increase.

  This invention is made | formed in view of such a situation, The objective is to provide the manufacturing method of the bus-bar resin molded product by which the increase in an operation man-hour is suppressed irrespective of arrangement | positioning of a some bus bar.

  A method of manufacturing a bus bar resin molded product that solves the above-described problem is to integrate a plurality of bus bars that are insulated from each other through a synthetic resin material by resin injection molding. The bus bar resin molded product manufacturing method includes: a bus bar manufacturing process for manufacturing a bus bar connecting body in which a plurality of bus bars are connected through a connecting portion by metal powder injection molding using metal powder as a material; Arrangement step of arranging the bus bar connector relative to the mold, and resin molding step of injecting and filling the synthetic resin material into the die with the bus bar connector arranged in the mold for resin molding The bus bar coupling body after being integrated with the synthetic resin material through the resin molding process further includes a dividing step of dividing the connecting portion so that the plurality of bus bars are insulated from each other.

  According to the said structure, a bus-bar coupling body is manufactured by metal powder injection molding first. In this case, the bus bar connector can be manufactured regardless of how the plurality of bus bars insulated from each other are arranged with respect to the synthetic resin material. That is, even when a plurality of bus bars are three-dimensionally arranged with respect to the synthetic resin material, the bus bar assembly is suitably manufactured by using metal powder injection molding. be able to. Thus, in the arranging step, the bus bar connector can be arranged in the resin molding die by arranging the bus bar connector in the resin molding die. Therefore, an increase in work man-hours can be suppressed regardless of the arrangement of the plurality of bus bars.

  Moreover, in the bus bar manufacturing process having the above configuration, by adopting metal powder injection molding, it is possible to manufacture a bus bar linked body in which the connecting portion is configured so as to have a shape and arrangement that can be easily cut in the subsequent cutting process. . Therefore, the function for assisting the dividing operation of the connecting portion regardless of the arrangement of the plurality of bus bars can be added to the bus bar connecting body by the bus bar manufacturing process.

  In this case, specifically, the arranging step is arranged so that at least a part of the connecting portion of the bus bar connector is in contact with the mold for resin molding, and after the resin molding step. The bus bar assembly is integrated with the synthetic resin material with a part of the synthetic resin material exposed, and the dividing step divides the part of the connection part exposed from the synthetic resin material. To do.

  According to the above configuration, in the dividing step, it is only necessary to divide a portion exposed from the synthetic resin material in the connecting portion, and it becomes easy for an operator, a working device, or the like to confirm the portion to be divided. Therefore, the function for assisting the dividing operation of the connecting portion can be added to the bus bar connected body by the bus bar manufacturing process.

  In addition, a method of manufacturing a bus bar resin molded product that solves the above-described problem is a bus bar manufacturing process in which a bus bar connecting body in which a plurality of bus bars are connected via a connecting portion is manufactured by metal powder injection molding using metal powder as a material. And an arrangement step of arranging the bus bar coupling body in the resin molding mold, and in a state where the bus bar coupling body is disposed in the resin molding mold, the mold is clamped and a synthetic resin material is injected into the mold. A resin molding process, and the resin molding process uses the injection pressure force of the synthetic resin material generated when the synthetic resin material is injected and filled so that the plurality of bus bars are insulated from each other. And a dividing step of dividing the connecting portion.

  According to the above configuration, as described above, the bus bar assembly can be manufactured regardless of how the plurality of bus bars insulated from each other are arranged, so that the work can be performed regardless of the arrangement of the plurality of bus bars. It is the same that the increase in man-hours can be suppressed.

  Similarly, since it is possible to manufacture a bus bar connecting body that constitutes the connecting portion so as to be in a shape or arrangement that is easily divided in the dividing step, it is for assisting the dividing operation of the connecting portion regardless of the arrangement of the plurality of bus bars. Similarly, the function can be added to the bus bar assembly by the bus bar manufacturing process.

  Furthermore, according to the above configuration, since the dividing step can be completed while the resin molding step is performed, it is not necessary for an operator, a working device, or the like to perform the dividing operation. Therefore, the resin molding process and the cutting process can be combined, and the total number of processes can be reduced.

  In this case, specifically, the bus bar manufacturing process has a pressure receiving portion that is a portion of the connecting portion of the bus bar coupling body that is configured to have a larger surface area of the pressure receiving surface that receives the injection pressure as compared with other portions. In addition, the bus bar connector is manufactured, and the arranging step is to arrange the bus bar connector so that the pressure receiving surface of the pressure receiving part of the connecting part faces the injection port of the synthetic resin material.

  According to the said structure, in a resin molding process, ie, a division | segmentation process, it becomes possible to make an injection pressure act on a connection part suitably through a pressure receiving part. Therefore, the connection part is suitably divided.

  Moreover, in the manufacturing method of the bus bar resin molded product, the bus bar manufacturing process is a part for positioning the bus bar connecting body in the mold for resin molding in the arranging process. It is desirable to manufacture a bus bar assembly so as to have a mold positioning part.

  In the bus bar manufacturing process with the above configuration, by adopting metal powder injection molding, the bus bar connecting part configured the mold positioning part so that the bus bar connecting body can be easily placed in the mold for resin molding in the subsequent placing process. The body can be manufactured. Therefore, the function for assisting the arrangement | positioning operation | work which arrange | positions a bus-bar coupling body to the metal mold | die for resin molding can be added to a bus-bar coupling body by a bus-bar manufacturing process.

In addition, in the manufacturing method of a bus-bar resin molded product, the conveyance process which conveys a bus-bar coupling body to the metal mold | die for resin molding may be included between a bus-bar manufacturing process and an arrangement | positioning process.
Specifically, in the manufacturing method of the bus bar resin molded product, the transfer process in which the transfer robot grips the bus bar coupling body and transfers it to the mold for resin molding through the bus bar manufacturing process and before the transition to the arrangement process. The bus bar manufacturing process further includes a gripping positioning portion that is a part for positioning the bus bar coupled body when the transport robot grips the bus bar coupled body, and the transport robot grips the bus bar coupled body. The bus bar connector is manufactured so as to have a gripping part as a part for the purpose.

  In the bus bar manufacturing process with the above configuration, by adopting metal powder injection molding, the gripping positioning part and the gripping part are made so that the transport robot can easily transport the bus bar connector to the mold for resin molding in the subsequent transport process. The bus-bar coupling body which comprised this can be manufactured. Therefore, even when the transport process is included, a function for assisting the transport work of the transport robot that transports the bus bar coupled body to the mold for resin molding can be added to the bus bar coupled body by the bus bar manufacturing process. it can.

  According to the present invention, an increase in work man-hours can be suppressed regardless of the arrangement of a plurality of bus bars.

The perspective view which shows the schematic structure about the bus-bar resin molded product of 1st Embodiment. The perspective view which shows schematic structure of the bus bar about the bus-bar resin molded product. The figure explaining the manufacturing process of the bus-bar resin molded product. The perspective view which shows schematic structure of the bus-bar coupling body about the bus-bar resin molded product. The perspective view which shows the aspect of the conveyance process about the manufacturing process of the bus-bar resin molded product. It is sectional drawing which shows the arrangement | positioning process about the manufacturing process of the bus-bar resin molded product, Comprising: The VI-VI sectional view taken on the line of FIG. The perspective view which shows the aspect of a parting process about the manufacturing process of the bus-bar resin molded product. The perspective view which shows schematic structure of the bus bar about the bus-bar resin molded product of 2nd Embodiment. The figure explaining the manufacturing process of the bus-bar resin molded product. The perspective view which shows schematic structure of the bus-bar coupling body about the bus-bar resin molded product. It is sectional drawing which shows the aspect of the arrangement | positioning process about the manufacturing process of the bus-bar resin molded product, Comprising: The XI-XI sectional view taken on the line of FIG. Sectional drawing which shows the aspect of the resin molding process about the manufacturing process of the bus-bar resin molded product. Sectional drawing which shows the aspect of the bus-bar manufacturing process about the manufacturing process of the bus-bar resin molded product of a modification. Sectional drawing which shows schematic structure of the bus-bar about the bus-bar resin molded product of a modification. The perspective view which shows schematic structure of the bus-bar coupling body about the bus-bar resin molded product of a modification.

(First embodiment)
Hereinafter, 1st Embodiment of the manufacturing process of a bus-bar resin molded product is described.
As shown in FIG. 1, the bus bar resin molded product 1 includes a plurality (two in this embodiment) of bus bars 2 and 3 made of a conductive metal material such as copper used as a wiring material. The bus bar resin molded product 1 is obtained by integrating bus bars 2 and 3 via a resin coating portion 4 made of a synthetic resin material. The bus bars 2 and 3 are integrated in a state of being insulated from each other by the resin coating portion 4. One side terminals 2a and 3a, which are part of the bus bars 2 and 3, protrude from the resin coating portion 4 and are electrically connected to, for example, an electrode of the DC power source V. The other terminals 2b and 3b, which are part of the bus bars 2 and 3, protrude from the resin coating portion 4 and are electrically connected to, for example, the electrodes of the inverter Inv. Thus, the bus bar resin molded product 1 functions as a conductor through the bus bars 2 and 3.

  Specifically, as shown in FIGS. 1 and 2, the bus bars 2 and 3 are both L-shaped and include rectangular parallelepiped main bodies 20 and 30 having long sides and short sides, respectively. In the following description, the longitudinal direction of the main body portions 20 and 30 is referred to as “extension direction”, the short direction of the main body portions 20 and 30 is referred to as “width direction”, and the longitudinal direction and short width of the main body portions 20 and 30 are referred to. The direction orthogonal to the direction is referred to as the “thickness direction”. In this case, it can be said that the main-body parts 20 and 30 are carrying out the thin plate shape with a small thickness direction compared with the width direction.

  The main body portions 20 and 30 are arranged side by side so that the surfaces in the thickness direction face each other. That is, the main body portions 20 and 30 are not arranged so that the longitudinal direction and the short direction are parallel to the direction in which they are arranged, but are arranged so that the longitudinal direction and the short direction are orthogonal to each other. . As a result, the bus bars 2 and 3 are not arranged so as to be two-dimensionally graspable with respect to the resin coating portion 4, but are arranged in a three-dimensional manner that must be grasped three-dimensionally with respect to the resin coating portion 4. Has been.

  One end terminals 2a and 3a and the other end terminals 2b and 3b are provided at end portions in the extending direction of the main body sections 20 and 30, respectively. The one-side terminals 2 a and 3 a are portions that extend in the width direction of the main body portions 20 and 30 from one end on the long side at the end portions on one side of the main body portions 20 and 30. The one-side terminals 2a and 3a have a thin plate shape having a thickness in the extending direction of the main body portions 20 and 30, and having a width in the thickness direction of the main body portions 20 and 30, respectively. The other side terminals 2b and 3b are ends of the main body parts 20 and 30 opposite to the side where the one side terminals 2a and 3a are provided.

  The main body portions 20 and 30 are provided with a plurality (two in this embodiment) of column portions 21 and 31 extending in the width direction, respectively. The column portions 21 and 31 bulge in the thickness direction of the main body portions 20 and 30, respectively, and have a columnar shape extending in the width direction of the main body portions 20 and 30. The tips of the column portions 21 and 31 protrude in the width direction from both long sides of the main body portions 20 and 30. The two column portions 21 and 31 are provided in the main body portions 20 and 30 with predetermined intervals in the extending direction, respectively. In this embodiment, the column parts 21 and 31 (especially the front-end | tip) are an example of a metal mold | positioning part.

  Between the bus bar 2 and the bus bar 3, projecting pieces 22 and 32 projecting toward the mutually opposing column parts 21 and 31 are provided on the column part 21 and the column part 31 facing each other. The protruding pieces 22 and 32 are provided in the middle of the main body portions 20 and 30 in the column portions 21 and 31 in the width direction. The protruding pieces 22 and 32 facing each other are divided in the manufacturing process of the bus bar resin molded product 1, and a connecting portion 51 (described later in FIG. 4) that connects the bus bar 2 and the bus bar 3 before the dividing. Part of). In addition, a part of the front ends of the column parts 21 and 31 and a part of the front ends of the protruding pieces 22 and 32 protrude from the resin coating part 4, respectively.

  In the main body parts 20 and 30, work auxiliary parts 23 and 33 are provided between the one side terminals 2a and 3a and the pillar parts 21 and 31 on the one side terminals 2a and 3a side. The work assistants 23 and 33 are provided at one end on the long side of the main body 20 or 30. The work assistants 23 and 33 have bottomed cylindrical holes 23a and 33a and plate-like gripping pieces 23b and 33b, respectively. The hole portions 23 a and 33 a have openings in the width direction of the main body portions 20 and 30. The grip pieces 23 b and 33 b extend in the thickness direction of the main body portions 20 and 30. The work auxiliary parts 23 and 33 are respectively covered with the resin coating part 4. In the present embodiment, the holes 23a and 33a (work auxiliary parts 23 and 33) are examples of gripping positioning parts, and the grip pieces 23b and 33b (work auxiliary parts 23 and 33) are examples of gripping parts.

Hereinafter, the manufacturing process of the bus bar resin molded product 1 will be described.
As shown in FIG. 3, this manufacturing process includes five main processes: a bus bar manufacturing process, a transport process, an arrangement process, a resin molding process, and a dividing process.

In the bus bar manufacturing process, the bus bar 2 and the bus bar 3 are manufactured by metal powder injection molding using a metal powder containing copper powder, that is, so-called MIM.
As shown in a simplified manner in FIG. 3, in the bus bar manufacturing process, the metal material 130, which is a metal powder dissolved in the MIM mold 100 (core 110 and cavity 120), is injected and filled, and the bus bar 2 and the bus bar 3. Are integrally injection-molded. The metal material 130 is injected and filled into the MIM mold 100 from, for example, an injection port (so-called gate) 140 provided at one location inside the MIM mold 100. The injection port 140 is connected to a passage (so-called runner or sprue) 150 provided in the core 110. This passage is connected to a portion where an injection machine 160 for injecting the metal material 130 is disposed.

  Thereafter, an integrated product in which the bus bar 2 and the bus bar 3 are integrated is removed from the MIM mold 100 by injection molding, whereby the bus bar connector 50 is completed. In addition, after taking out the bus-bar coupling body 50 from the MIM mold 100, the metal material 130 is hardened through a sintering process (not shown).

  As shown in FIG. 4, the bus bar connector 50 includes one side terminals 2a and 3a, the other side terminals 2b and 3b, main body portions 20 and 30, two column portions 21 and 31, work auxiliary portions 23 and 33 (hole portions). The bus bar 2 and the bus bar 3 having 23a and 33a and gripping pieces 23b and 33b, respectively, are integrated. In this case, the bus bar 2 and the bus bar 3 are connected via a plurality of (two in this embodiment) connecting portions 51 formed by connecting the protruding pieces 22 and 32 facing each other. In the present embodiment, the connecting portion 51 has a prismatic shape.

  The connecting portion 51 is provided with a plurality of (two in this embodiment) notches 52 at predetermined intervals in the longitudinal direction. The notch 52 is formed by notching the side where the one side terminals 2a, 3a of the bus bars 2, 3 extend in a U shape. Thus, the bus bars 2 and 3 are connected to each other through the connecting portions 51 a that are the projecting pieces 22 and 32 that face each other and are located between the two notches 52. In the connecting part 51, the part of the notch 52 is a weak part that is weaker than the other part by the amount of the part of the connecting part 51 cut out.

  As shown in FIG. 3 in a simplified manner, in the transport process after the bus bar manufacturing process, the bus bar connecting body 50 taken out from the MIM mold 100 in the bus bar manufacturing process is gripped by the transport robot 200, and the subsequent resin molding process. It is conveyed to the resin molding die 300 (core 310 and cavity 320) used in the above.

  As shown in FIG. 5, the transport robot 200 includes arms 220 and 230 that hold the bus bar connector 50 from both sides of the wall thickness method of the bus bars 2 and 3. The arm 220 grips from the bus bar 2 side when gripping the bus bar connector 50. The arm 230 grips from the bus bar 3 side when gripping the bus bar connector 50. The arms 220 and 230 have rod-like positioning pins 221 and 231 extending with respect to the bus bar connector 50, respectively. The arms 220 and 230 have engaging hooks 222 and 232 having hooks at the ends. The arms 220 and 230 move relative to the bus bar connector 50 so as to approach the bus bars 2 and 3 from the direction in which the one side terminals 2a and 3a extend (above the paper surface), respectively. 33 is engaged.

  In this case, as shown in an enlarged view in FIG. 5, the distal end of the positioning pin 221 is inserted into the hole 23 a of the work auxiliary portion 23. In addition, the engagement hook 222 is engaged with the gripping piece 23b of the work auxiliary unit 23 from the opposite side (downward in the drawing) to the direction in which the one-side terminal 2a extends. The same applies to the positioning pin 231 and the engagement hook 232, and the distal end of the positioning pin 231 is inserted into the hole 33 a of the work auxiliary portion 33, and the distal end of the engagement hook 232 is held by the work auxiliary portion 33. It is engaged with the piece 33b. Thereby, the arms 220 and 230 of the transfer robot 200 can be positioned with respect to the bus bar connector 50 and can hold the bus bar connector 50.

  Subsequently, as shown in a simplified manner in FIG. 3, in the arrangement step after the conveyance step, the bus bar connector 50 conveyed in the conveyance step is arranged in the resin molding die 300 (core 310 and cavity 320). . In this case, the bus bar coupling body 50 is arranged with respect to the resin molding die 300, whereby the integrated bus bars 2 and 3 are collectively arranged with respect to the resin molding die 300.

  As shown in FIG. 6, the core 310 and the cavity 320 of the resin molding die 300 each have mold portions 311 and 321 which are internal spaces provided by cutting out the inside. The mold parts 311 and 321 respectively have opening parts 312 and 322 that are opened between the mold part 311 and the mold part 321 on the sides facing each other. In the mold portions 311 and 321, the bottom portions 313 and 323 respectively facing the opening portions 312 and 322 have a plurality of portions (in this embodiment, positions for positioning the bus bar connector 50 with respect to the core 310 and the cavity 320). 4) positioning recesses 314, 324, which are the same number as the total of the column portions 21, 31, are provided. The positioning recesses 314 and 324 are recessed at the bottoms 313 and 323 on the side opposite to the openings 312 and 322, so that the ends of the column parts 21 and 31 provided on the bus bars 2 and 3 can be fitted. Is set.

  In this case, in the core 310 of the resin molding die 300, the front ends of the pillar portions 21 and 31 of the bus bars 2 and 3, the front ends on the side where the one side terminals 2 a and 3 a extend are respectively located in the positioning recesses 314 of the bottom portion 313. Mated. Similarly, of the tips of the pillar portions 21 and 31 of the bus bars 2 and 3, the tips on the side opposite to the side on which the one-side terminals 2 a and 3 a extend are fitted in the positioning recesses 324 of the bottom portion 323. Accordingly, the bus bar connector 50 is disposed in the resin molding die 300 in a state of being positioned with respect to the core 310 and the cavity 320, respectively.

  In addition, the bus bar connector 50 is disposed in the resin molding die 300 so that the connecting portion 51a including the notch 52 among the connecting portions 51 of the bus bar connector 50 is brought into contact with the core 310 and the cavity 320, respectively. Is done. Thus, the synthetic resin material 330 is configured not to be injected and filled around the connecting portion 51 a including the notch 52 of the connecting portion 51. That is, the connecting portion 51 a including the notch 52 is configured to be exposed without being covered by the resin coating portion 4.

  Subsequently, as shown in a simplified manner in FIG. 3, in the resin molding step after the arranging step, the bus bar connecting body 50 is placed in the resin molding die 300 and the mold is clamped to perform the resin molding die. 300 (core 310 and cavity 320) is melt-filled with the synthetic resin material 330, and the resin coating portion 4 is injection-molded onto the bus bar connector 50. For example, a synthetic resin material 330 is injected and filled into the resin molding die 300 from, for example, an injection port 340 provided at one location inside the resin molding die 300. The injection port 340 is connected to a passage (so-called runner or sprue) 350 provided in the core 310. This passage is connected to a portion where an injection machine 360 for injecting the synthetic resin material 330 is disposed.

  Thereafter, an integrated product in which the resin coating portion 4 is integrated with the bus bar connector 50 is removed from the mold 300 for resin molding by injection molding, thereby completing the bus bar connector resin molded product 1 ′. In the bus bar connector resin molded product 1 ′, the bus bars 2 and 3 are electrically connected via the connecting portion 51.

  Subsequently, as shown in a simplified manner in FIG. 3, in the dividing step after the resin molding step, the bus bar connector 50 of the bus bar connector resin molded product 1 ′ taken out from the resin molding die 300 in the resin molding step. The connecting portion 51 is cut by the cutting device 400.

  As shown in FIG. 7, the cutting device 400 includes a breaking portion 410 that cuts the connecting portion 51 of the bus bar connector 50. When the breaking portion 410 divides the connecting portion 51, for example, a force is applied to the connecting portion 51 a among the connecting portions 51 from the side where the one side terminals 2 a and 3 a of the bus bars 2 and 3 extend (above the paper surface). . In this case, in the connecting portion 51, the two notches 52 that are weak portions are broken, and the connecting portions 51a that are portions between the two notches 52 are cut off (cut), and the protruding pieces 22 and 32 are cut. Divided to leave only. As a result, the bus bars 2 and 3 are separated from each other so as to be insulated from each other by the resin coating portion 4 while being released from the electrically connected state via the connecting portion 51.

Then, as shown in a simplified manner in FIG. 3, after the dividing step, the bus bar resin molded product 1 is completed in which the bus bars 2 and 3 are integrated with the resin coating portion 4 being insulated from each other.
According to the present embodiment described above, the following operations and effects are achieved.

  (1) When manufacturing the bus bar resin molded product 1, first, the bus bar connector 50 is manufactured by metal powder injection molding. In this case, the bus bar connector 50 can be manufactured regardless of how the bus bars 2 and 3 insulated from each other are arranged with respect to the resin coating portion 4. Even when the bus bars 2 and 3 are three-dimensionally arranged with respect to the resin coating portion 4 as in the present embodiment, the bus bars can be obtained by using metal powder injection molding. The coupling body 50 can be manufactured suitably. Thereby, in the arrangement step, the bus bars 2 and 3 can be collectively arranged in the resin molding die 300 by arranging the bus bar connector 50 in the resin molding die 300. Therefore, an increase in work man-hours can be suppressed regardless of the arrangement of the bus bars 2 and 3.

  (2) Further, in the bus bar manufacturing process of the present embodiment, by adopting metal powder injection molding, the notch 52 is provided and the resin coating portion 4 so as to have a shape and an arrangement that can be easily cut in the subsequent cutting process. It is possible to manufacture the bus bar connecting body 50 that constitutes the connecting portion 51 so as to be exposed from the above. Therefore, a function for assisting the dividing operation of the connecting portion 51 regardless of the arrangement of the bus bars 2 and 3 can be added to the bus bar connector 50 by the bus bar manufacturing process.

  (3) As shown in FIG. 7, the bus bar connector 50 after the resin molding step is integrated with the resin coating portion 4 in a state where the connecting portion 51 a is exposed from the resin coating portion 4. In the dividing step of the present embodiment, the connecting portion 51 is divided by cutting off the connecting portion 51 a of the connecting portion 51.

  According to the present embodiment, in the dividing step, it is only necessary to divide the connecting portion 51a which is a portion exposed from the resin coating portion 4 in the connecting portion 51, and an operator, a working device, or the like confirms the portion to be divided. It becomes easy. Therefore, the function for assisting the dividing operation of the connecting portion 51 can be added to the bus bar connector 50 by the bus bar manufacturing process.

  (4) Also, as shown in FIG. 6, when the bus bar connector 50 is placed in the resin molding die 300 in the placement step, the bus bars 2, 3 are placed in the positioning recesses 314, 324 of the core 310 and the cavity 320. The bus bar connector 50 is positioned with respect to the resin molding die 300 by fitting the tips of the column parts 21 and 31 respectively.

  That is, in the bus bar manufacturing process of the present embodiment, the column parts 21 and 31 are formed by adopting metal powder injection molding so that the bus bar connector 50 can be easily placed in the resin molding die 300 in the subsequent placement process. The bus-bar coupling body 50 which comprised this can be manufactured. Therefore, the function for assisting the arrangement | work which arrange | positions the bus-bar coupling body 50 to the resin mold 300 can be added to the bus-bar coupling body 50 by a bus-bar manufacturing process.

  (5) As shown in FIG. 3 and FIG. 5, in the method for manufacturing the bus bar resin molded product 1 of the present embodiment, the bus bar connector 50 is placed between the bus bar manufacturing process and the arranging process. It includes a transport process for transporting to the top. In this case, the bus bar connector 50 is gripped by the transport robot 200 via the work assistants 23 and 33.

  That is, in the bus bar manufacturing process of the present embodiment, by adopting metal powder injection molding, work is performed so that the transport robot 200 can easily transport the bus bar connector 50 to the resin molding die 300 in the subsequent transport process. The bus-bar coupling body 50 which comprised the auxiliary | assistant parts 23 and 33 (hole part 23a, 33a and holding piece 23b, 33b) can be manufactured. Therefore, even when the transport process is included, a function for assisting the transport operation of the transport robot 200 that transports the bus bar connector 50 to the resin molding die 300 is added to the bus bar connector 50 by the bus bar manufacturing process. can do.

(Second Embodiment)
Next, 2nd Embodiment of the manufacturing method of a bus-bar resin molded product is described. In addition, the same structure as embodiment already demonstrated attaches | subjects the same code | symbol, and the duplicate description is abbreviate | omitted.

First, the configuration of the bus bars 2 and 3 according to the present embodiment will be described.
As shown in FIG. 8, in the bus bar 2, the pillar portion 21 is provided with a protruding piece 24 that protrudes toward the pillar portion 31 of the opposing bus bar 3. On the other hand, in the bus bar 3, the column portion 31 is provided with a bent portion 34 that protrudes toward the column portion 21 of the opposite bus bar 2 and bends on the opposite side to the side on which the one side terminal 3a extends. Yes. The bent portion 34 is provided with a large surface portion 35 having a surface 35a whose surface area is set larger than that of other portions. The large surface portion 35 has a disk shape, and is configured such that the surface area of the surface 35 a is larger in the extending direction of the main body portion 30 than other portions. The protruding piece 24 and the bent portion 34 are provided in the middle of the main body portions 20 and 30 in the width direction of the column portions 21 and 31. Note that the protruding piece 24 and the bent portion 34 facing each other are divided in the manufacturing process of the bus bar resin molded product 1, and a connecting portion 53 (described later) that connects the bus bar 2 and the bus bar 3 before the cutting. (Shown in FIG. 10). The protruding piece 24 and the bent portion 34 are entirely covered with the resin coating portion 4. In the present embodiment, the large surface portion 35 is an example of a pressure receiving portion, and the surface 35a is an example of a pressure receiving surface.

Hereinafter, the manufacturing process of the bus bar resin molded product 1 of the present embodiment will be described.
As shown in FIG. 9, this manufacturing process includes roughly four processes including a bus bar manufacturing process, a transport process, an arrangement process, and a resin molding process. And the manufacturing process of this embodiment differs in the point from which the resin molding process serves as a parting process with respect to the said 1st Embodiment including a parting process after a resin molding process.

  As shown in FIGS. 9 and 10, in the bus bar manufacturing process of the present embodiment, the one side terminals 2 a and 3 a, the other side terminals 2 b and 3 b, the main body parts 20 and 30, the two column parts 21 (projection pieces 24), A bus bar connecting body 50 in which the bus bar 2 and the bus bar 3 each having 31 (bent portion 34) and work auxiliary portions 23 and 33 are integrated is metal injection molded. In this case, the bus bar 2 and the bus bar 3 are connected via a plurality of (two in this embodiment) connecting portions 53 formed by connecting the protruding pieces 24 and the bent portions 34 facing each other. In the present embodiment, the connecting portion 53 has a shape in which a prism extends so as to face the disk-shaped portion (large surface portion 35).

  Further, as shown in an enlarged view in FIG. 10, the connecting portion 53 is provided with a plurality of (two in this embodiment) notches 54 and 55 at predetermined intervals in the longitudinal direction. The notch 54 is provided between the column portion 21 and the large surface portion 35 of the bus bar 2, and the side on which the one side terminal 2 a of the bus bar 2 extends is notched in a U shape. The notch 55 is provided between the column portion 31 and the large surface portion 35 of the bus bar 3, and the side opposite to the side where the one side terminal 3 a of the bus bar 2 extends is notched in a U shape. In the connecting portion 53, the portions of the notches 54 and 55 are weak portions that are weaker than the other portions by the amount of the notched portion of the connecting portion 53.

  Further, as shown in FIG. 11, in the arrangement step after the conveying step, the resin molding die 300 has a space between the column portion 21 and the large surface portion 35 of the bus bar 2 in the connecting portion 53 of the bus bar connecting body 50. The bus bar coupling body 50 is disposed so that the column portion 31 and the large surface portion 35 of the bus bar 3 are in contact with the cavity 320, respectively. Thereby, the site | part which each contact | abuts to the cavity 320 among the connection parts 53 can fix the connection part 53 at a later resin molding process.

  As shown in FIGS. 9 and 11, the core 310 of the resin molding die 300 is provided with injection ports 340 at two locations, and the surface 35 a of the large surface portion 35 of the connecting portion 53 is formed at the injection port 340. Bus bar coupling bodies 50 are arranged so as to face each other. In this case, the cutout 54 of the connecting portion 53 faces the injection port 340 on the cutout side.

  Further, as shown in FIG. 11, the resin filling portion 325 in which the synthetic resin material 330 is injected and filled in the cavity 320 of the resin molding die 300 between the portions in contact with the connecting portion 53 of the bus bar connector 50. Is provided. Accordingly, the bus bar connector 50 is disposed in the resin molding die 300 so that the opposite side of the surface 35 a of the large surface portion 35 of the connecting portion 53 faces the resin filling portion 325. In this case, the notch 55 of the connecting portion 53 faces the resin filling portion 325 on the notched side.

  As shown in FIG. 12, in the resin molding process after the arrangement process of the present embodiment, when the synthetic resin material 330 dissolved in the mold parts 311 and 321 is injected and filled through the injection port 340, it is synthesized into the resin filling part 325 and the like. While the resin material 330 is injected and filled, the injection pressure of the synthetic resin material 330 acts on the surface 35 a of the large surface portion 35 of the connecting portion 53. In this case, the connecting portion 53 is a fragile portion, and the notch 54 cut out on the injection port 340 side is broken by the injection pressure, and the fragile portion is cut out on the resin filling portion 325 side. Bending toward the resin filling portion 325 with the injection pressure around 55. That is, the connecting portion 53 is divided from the notch 54 into the protruding piece 24 and the bent portion 34. As a result, the bus bars 2 and 3 are separated from each other so as to be insulated from each other by the resin coating portion 4 while being released from the electrically connected state via the connecting portion 53. In addition, the protruding piece 24 and the bent portion 34 are covered with the resin coating portion 4 by the synthetic resin material 330 injected and filled in the resin filling portion 325 in a divided state. Thus, the resin molding process of the present embodiment also serves as a cutting process for cutting the bus bars 2 and 3.

  As a result, as shown in a simplified manner in FIG. 9, the bus bar resin molded product 1 in which the bus bars 2 and 3 are integrated with each other by the resin coating portion 4 after the resin molding step is completed.

According to this embodiment described above, the following actions and effects can be obtained in addition to the actions and effects of (1) and (3) to (5) of the first embodiment.
(6) In the bus bar manufacturing process of the present embodiment, by adopting metal powder injection molding, the large surface portion 35 is provided and the notches 54 and 55 are formed so as to have a shape and arrangement that can be easily cut in the subsequent cutting process. Thus, the bus bar connector 50 in which the connecting portion 53 is configured can be manufactured. Therefore, a function for assisting the dividing operation of the connecting portion 53 regardless of the arrangement of the bus bars 2 and 3 can be added to the bus bar connecting body 50 by the bus bar manufacturing process.

  (7) Further, according to the present embodiment, since the dividing step can be completed while the resin molding step is performed, it is not necessary for an operator, a working device, or the like to perform the dividing operation. Therefore, the resin molding process and the cutting process can be combined, and the total number of processes can be reduced.

  (8) As shown in FIG. 10, the bus bar manufacturing process of the present embodiment has the large surface portion 35 configured to have a larger surface area than the other portions in the connecting portion 53 of the bus bar connector 50. The bus bar connector 50 is manufactured.

  Further, as shown in FIG. 11, in the arrangement step of the present embodiment, the arrangement is performed so that the surface 35 a of the large surface portion 35 of the connecting portion 53 of the bus bar connecting body 50 faces the injection port 340 of the synthetic resin material 330. Is.

  According to the present embodiment, the injection pressure can be suitably applied to the connecting portion 53 through the large surface portion 35 in the resin molding step, that is, the dividing step. Therefore, the connection part 53 is divided appropriately.

In addition, each said embodiment can also be implemented with the following forms.
As shown in FIG. 13, the core 110 of the MIM mold 100 used in the bus bar manufacturing process of the first embodiment is irradiated with a metal material 130 injected and filled into the MIM mold 100. Two outlets 140 may be provided. In this case, inside the MIM mold 100, the two injection ports 140 are configured so that one by one communicates with the portions 20 ′ and 30 ′ corresponding to the main body portions 20 and 30 of the bus bars 2 and 3. . In the bus bar manufacturing process of this modification, the metal material 130 dissolved in the MIM mold 100 is injected and filled through the injection port 140. The metal material 130 injected and filled from the two injection ports 140 passes through the portions 21 ′ and 31 ′ corresponding to the main body portions 20 and 30 (column portions 21 and 31) of the bus bars 2 and 3, respectively. Each of the portions 51 ′ corresponding to is filled. In this case, the metal material 130 filled through the portion 21 'corresponding to the main body portion 20 (column portion 21) of the bus bar 2 and the portion 31' corresponding to the main portion 30 (column portion 31) of the bus bar 3 are passed. The welded metal material 130 joins at a portion corresponding to the connecting portion 51 to form a weld line (weld line) L. The part where the weld line L is formed becomes a fragile part in the connecting part 51 (bus bar connector 50). In such a modified example, when the connecting portion 51 is divided, even if the notch 52 is not provided, the portion where the weld line L that is a fragile portion is formed is broken. That is, as in the first embodiment, in the bus bar manufacturing process, by adopting metal powder injection molding, it has a portion where a weld line L that is easily divided when the subsequent connecting portion 51 is divided is formed. The bus bar connector 50 can be manufactured. The same applies to the second embodiment. For example, in the case of the second embodiment, the weld line L is set so as to be formed in a portion corresponding to the notch 54 of the connecting portion 53 instead of being provided with the notch 54.

  As shown in FIG. 14, in the first embodiment, the bus bar connector 50 is a sintering process after being taken out from the MIM mold 100, and a part of the connecting part 51 transmits heat such as ceramic. You may make it cover with the difficult heat insulating material 500. FIG. In this case, in the part covered with the heat insulating material 500, it becomes difficult for heat to pass in the sintering process, and the solidification of the metal material 130 is prevented. The part where the solidification of the metal material 130 is hindered becomes a fragile part in the connecting part 51 (bus bar connector 50). In such a modified example, when the connecting portion 51 is divided, even if the notch 52 is not provided, the portion where the solidification of the metal material 130 that is a fragile portion is hindered is broken. That is, in the sintering step after the bus bar manufacturing step, the bus bar connector 50 can be manufactured so as to have a portion that prevents solidification of the metal material 130 that is easily divided when the subsequent connecting portion 51 is divided. . The same applies to the second embodiment. For example, in the first embodiment, the heat insulating material 500 is attached to a portion corresponding to the notch 52 of the connecting portion 51 instead of the notch 52 being provided.

  -As shown in FIG. 15, in the said 1st Embodiment, you may change suitably the position in which the connection part 51 is provided, if the bus-bars 2 and 3 can be connected. For example, as shown in FIG. 15A, the connecting portion 51 may be provided at a position where the one side terminals 2a and 3a of the bus bars 2 and 3 are connected to each other. Moreover, as shown by (B) in the same figure, you may make it the connection part 51 be provided in the position which connects the other side terminals 2b and 3b of the bus-bars 2 and 3 mutually. Moreover, in the same figure, as shown by (C), (D), and (E), the connection part 51 is a position which connects the edge part by the side of the long side of the main-body parts 20 and 30 of the bus bars 2 and 3 mutually. May be provided. In addition, in the same figure, the example of (E) is effective when avoiding between the main-body parts 20 and 30 of the bus bars 2 and 3. FIG. In this way, in the bus bar manufacturing process, the connecting portion 51 can be provided at a desired position by employing metal powder injection molding. The same applies to the second embodiment.

  -In the said 1st Embodiment, the notch 52 should just be a shape and arrangement | positioning which are easy to cut | disconnect the connection part 51 at a division | segmentation process, and the structure should be provided alternately with respect to the width direction of the main-body parts 20 and 30. Or the position to be provided may be changed. The same applies to the second embodiment.

  -In the said 2nd Embodiment, the structure of the connection part 53 should just be comprised so that an injection pressure may act at the time of a resin molding process, and the structure has the large surface part 35 comprised the shape of a square plate, or a large surface part. 35 may not be provided.

  In each of the above-described embodiments, the work assistants 23 and 33 may be configured so that the transport robot 200 can grip the bus bar coupling body 50, and the structure omits the holes 23 a and 33 a and holds the grip pieces 23 b. , 33b, or only one of the work assistants 23, 33.

  In each of the above embodiments, the operator may transport the bus bar connector 50 in the transport process. In this case, the work auxiliary units 23 and 33 may not be provided. Alternatively, the transporting process itself may be omitted, and the placing process may be performed on the resin molding die 300 placed on the spot after the bus bar manufacturing process.

  In each of the above-described embodiments, the configuration of the column portions 21 and 31 may be configured so that the bus bar connector 50 can be positioned with respect to the resin molding die 300, and the configuration is the tip of the column portions 21 and 31. Or only one in the width direction of the main body portions 20 and 30 may be used.

  In each of the above embodiments, in the arranging step, the bus bar connector 50 can be positioned with respect to the resin molding die 300 using, for example, a portion where the connecting portions 51 and 53 contact the resin molding die 300. If it exists, the column parts 21 and 31 may not be provided.

  As in the above embodiments, in the bus bar manufacturing process, by adopting metal powder injection molding, it is preferable to manufacture even the bus bar connector 50 in which three, four or more bus bars are integrated. Can do. In addition, when adopting metal powder injection molding, the degree of freedom of arrangement of the plurality of bus bars is increased, and the plurality of bus bars are irregularly arranged, or the plurality of bus bars are included in different shapes. be able to.

  The modifications may be applied in combination with each other. For example, the embodiment of the bus bar connector 50 in which three bus bars are integrated and the configuration of the other modifications are applied in combination with each other. May be.

  DESCRIPTION OF SYMBOLS 1 ... Bus bar resin molded product, 2 ... Bus bar, 2a ... One side terminal, 2b ... Other side terminal, 3 ... Bus bar, 3a ... One side terminal, 3b ... Other side terminal, 4 ... Resin coating | coated part, 20 ... Main-body part, 21 ... pillar part, 22 ... projecting piece, 23 ... work auxiliary part, 23a ... hole part, 23b ... gripping piece, 24 ... projecting piece, 30 ... main body part, 31 ... pillar part, 32 ... projecting piece, 33 ... work assistance Part 33a ... hole part 33b ... grip piece 34 ... bent part 35 ... large surface part 35a ... surface 50 ... busbar connector, 51 ... connecting part 51a ... connecting part 52 ... notch 53 ... Connecting part, 54, 55 ... notch, 100 ... MIM mold, 110 ... core, 120 ... cavity, 130 ... metal material, 140 ... injection port, 150 ... passage, 160 ... injection machine, 200 ... transport robot, 220 ... arm, 221 ... positioning pin, 222 ... engaging foot , 230 ... arm, 231 ... positioning pin, 232 ... engagement hook, 300 ... mold for resin molding, 310 ... core, 311 ... mold part, 312 ... opening, 313 ... bottom part, 314 ... positioning recess, 320 ... cavity 321 ... Mold part, 322 ... Opening part, 323 ... Bottom part, 324 ... Positioning recess, 325 ... Resin filling part, 330 ... Synthetic resin material, 340 ... Injection port, 350 ... Passage, 360 ... Injection machine, 400 ... Cutting device , 410 ... fracture part, 500 ... heat insulating material.

Claims (6)

In a manufacturing method of a bus bar resin molded product in which a plurality of bus bars that are insulated from each other are integrated through a synthetic resin material by resin injection molding,
A bus bar manufacturing process for manufacturing a bus bar connected body in which the plurality of bus bars are connected via a connecting portion by metal powder injection molding using metal powder as a material,
An arrangement step of arranging the bus bar connector with respect to a mold for resin molding;
A resin molding step in which the bus bar connector is placed in the mold, and the mold is clamped and a synthetic resin material is injected and filled into the mold.
The bus bar resin molding further including a dividing step of dividing the connecting portion so that the plurality of bus bars are insulated from each other with respect to the bus bar connecting body after being integrated with the synthetic resin material through the resin forming step. Product manufacturing method. The arranging step is arranged so that at least a part of the connecting portion of the bus bar connector is in contact with the mold.
The bus bar connector after the resin molding step is integrated with the synthetic resin material in a state where the part of the bus bar connector is exposed from the synthetic resin material,
2. The method of manufacturing a bus bar resin molded product according to claim 1, wherein in the dividing step, the part of the connecting portion exposed from the synthetic resin material is divided. In a manufacturing method of a bus bar resin molded product in which a plurality of bus bars that are insulated from each other are integrated through a synthetic resin material by resin injection molding,
A bus bar manufacturing process for manufacturing a bus bar connected body in which the plurality of bus bars are connected via a connecting portion by metal powder injection molding using metal powder as a material,
An arrangement step of arranging the bus bar connector in a mold for resin molding;
A resin molding step in which the bus bar connector is placed in the mold, and the mold is clamped and a synthetic resin material is injected and filled into the mold.
In the resin molding step, the connecting portion is divided so that the plurality of bus bars are insulated from each other by using an injection pressure force of the synthetic resin material generated when the synthetic resin material is injected and filled. A method for producing a bus bar resin molded product including a cutting step. In the bus bar manufacturing process, the bus bar has a pressure receiving portion that is a portion of the connecting portion of the bus bar connecting body that is configured to have a larger surface area of the pressure receiving surface that receives the injection pressure than other portions. To produce a connected body,
The bus bar resin molding according to claim 3, wherein the arranging step is arranged so that the pressure receiving surface of the pressure receiving portion of the connecting portion of the bus bar connecting body faces the injection port of the synthetic resin material. Product manufacturing method.   The bus bar connecting step is such that the bus bar connecting step includes a die positioning portion which is a portion for positioning the bus bar connecting body with respect to the die when the bus bar connecting member is arranged in the die in the arranging step. The manufacturing method of the bus-bar resin molded product as described in any one of Claims 1-4 which manufactures a body. Via the bus bar manufacturing process, prior to the transition to the placement process, further includes a transport process in which the transport robot grips the bus bar connector and transports it to the mold,
The bus bar manufacturing process includes a gripping positioning portion that is a part for positioning the bus bar coupled body when the transport robot grips the bus bar coupled body, and the transport robot grips the bus bar coupled body. The bus bar resin molded product manufacturing method according to claim 4, wherein the bus bar coupling body is manufactured so as to have a gripping part which is a part for the purpose.

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