JP2015009373A - Corrosion proof part forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrosion proof part forming method in which corrosion proof resin formation can be implemented at a terminal squeezing part of a crimping terminal even without using a mold structure.SOLUTION: A printing head (10H) of a 3D printer (10) is moved to the origin above a terminal squeezing part (TK) of a crimping terminal (T), and the printing head is moved from the origin to a prescribed direction while discharging corrosion proof resin (B) from the printing head to the front side of the terminal squeezing part, to form one layer of a corrosion proof layer. Then, the printing head is moved to the XYZ direction, and the corrosion proof resin is discharged, to form a corrosion proof resin layer of a prescribed thickness connecting to the one layer of the corrosion proof layer on the whole surface of the front side of the terminal squeezing part. Next, the terminal squeezing part (TK) is rotated and the same processing is implemented to both side surfaces and the rear surface of the terminal squeezing part one after another, to form the corrosion proof resin layer of the prescribed thickness over the whole circumference of the terminal squeezing part.

Description

  The present invention relates to an anticorrosion part molding method in which a crimp terminal is crimped to a terminal of a covered electric wire, and the anticorrosion part is covered with a resin mold and waterproofed.

In general, in the case of a covered electric wire, its tip is peeled off to expose the conductor, and it is connected to an electrical component or device via a terminal fitting that is crimped to the bare wire conductor. FIG. 5A is a perspective view of a terminal fitting obtained by crimping a crimp terminal to the covered electric wire W. FIG. In FIG. 5A, the coating of the end portion of the covered electric wire W is peeled to expose the core wire WC, and the crimp terminal T is crimped to the core wire WC to be crimped.
If the bare wire conductor of the core wire WC after crimping is left as it is, there is a disadvantage that moisture is transferred from the exposed conductor portion and penetrates, and then enters the covered electric wire by capillary action. In order to prevent this, a crimp terminal including a bare wire conductor is placed in a mold, a resin is injection-molded, covered with an anticorrosion resin B, and waterproofed as shown in FIG.

  FIG. 6 is a side cross-sectional view schematically showing a mold for covering the crimping portion of the crimping terminal of FIG. 5A with an anticorrosion resin B and waterproofing it as shown in FIG. 5B. A) (1) is a cross-sectional view before setting and injecting the crimping portion of the crimping terminal to the molding die of the main part of the apparatus to be waterproofed. FIGS. 6A and 6B are cross-sectional views immediately after setting the crimping portion and starting injection. FIG. 6B is a side view of the anticorrosion part molded crimp terminal covered with the anticorrosion resin B injection molded by the mold of FIG.

  The molding die 60 includes upper and lower molds 61 and 62, and a mold part 63 that is a molding cavity is provided in the upper and lower mold mating parts, and a runner 64 for an injection gate that injects and injects molten anticorrosion resin into the mold part 63. In this case, it is provided on the upper mold 61 side. Also, one side of the mold part 63 faces the outside of the mold, and one side thereof is closed with an elastic blocking plate 65 corresponding to the upper mold 61 side and an elastic blocking plate 66 corresponding to the lower mold 62 side using a rubber material or the like. It is supposed to be. The pair of elastic blocking plates 65 and 66 facing each other in the vertical direction is a member that closes one side of the mold portion 63 as described above, and at the same time, the exposed portion of the covered electric wire extending from the one side to the outside of the mold is elastic from above and below. It is also a member that is sandwiched and held.

Further, the elastic closing plates 65 and 66 are operated in a direction in which the elastic closing plates 65 and 66 are pressed and adhered to one side of the mold part 63 by the pressing mechanisms by the corresponding clamps 67 and 68, and the upper and lower molds 61 and 62 are relatively moved up and down. Thus, it is possible to operate in a direction in which the portion of the covered electric wire leaving the mold is elastically clamped from above and below.
Therefore, as shown in FIG. 6A, the crimp terminal is positioned and set in the mold part 63 of the molding die 60 except for the entire connecting part 21 at the tip of the crimp terminal T as a molding work. Since the covered electric wire W extending behind the crimp terminal T is a part that does not need to be waterproofed by welding a resin mold, it is taken out of the mold. The part of the covered electric wire W coming out from the mold part 63 is closely held and elastically clamped by the elastic closing plates 65 and 66 with the pressing force from above and below with the lower mold 62 when the upper mold 61 is lowered. The clamps 67 and 68 are operated almost in synchronism with this operation, and the upper and lower elastic closing plates 65 and 66 are pressed and brought into close contact with each other in the direction of closing one side of the mold part 63.
After the work is set, as shown in FIG. 6B, when molten anticorrosion resin is injected and injected into the mold part 63 from the runner 64 of the injection gate, the anticorrosion resin spreads through the mold part 63 without any damage and is crimped. Cover and weld the terminals.

  FIG. 6 (C) shows an embodiment in which a crimp terminal that is waterproofed by coating the core wire WC with the anticorrosion resin B is connected to the automobile body as a ground wire with a bolt at the connection portion at the tip of the crimp terminal T. ing.

<Improvements of Patent Document 1>
Thus, in order to coat and waterproof the core wire WC with the anticorrosive resin B, since molding is performed using a mold, the gate position, which is a precaution specific to mold molding when using the mold, is performed. It was necessary to consider setting, taper formation for mold release, sink marks, and the like. A mold structure must be precisely manufactured to match the shape of the crimp terminal T, and a mold is required for each crimp terminal having a different shape. For this reason, the production of molds for corrosion protection has become a major obstacle to the increased use of aluminum wires.

JP 2001-162647 A

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for forming an anticorrosion part that can be waterproofed by covering a crimp terminal with an anticorrosion resin without using a mold. Yes.

In order to solve the above problems, the anticorrosion part molding methods (A) and (B) of the present invention are characterized by the following.
(A) a print head origin moving step for moving the print head (10H) of the 3D printer (10) to a predetermined point (origin) above the terminal crimping portion (TK) of the crimp terminal (T);
(2) An anticorrosion resin 1 layer forming step of forming an anticorrosion resin layer by moving the print head in a predetermined direction from the origin while discharging the anticorrosion resin (B) from the print head to the front side of the terminal caulking portion; ,
(3) The print head is moved in the XYZ directions and the anticorrosion resin (B) is discharged, and the anticorrosion resin layer having a predetermined thickness is connected to the anticorrosion resin one layer formed in the anticorrosion resin one layer forming step. An anti-corrosion resin layer entire surface forming step to be formed on the entire front surface of the crimped portion;
(4) The terminal crimping portion (TK) of the crimp terminal (T) is rotated, and the steps (2) and (3) are sequentially performed on both side surfaces and the back surface of the terminal crimping portion to obtain a predetermined thickness. An anti-corrosion resin layer all-round forming step for forming the anti-corrosion resin layer of the terminal caulking portion around the entire circumference;
By performing anticorrosion part resin molding on the terminal crimping part of the crimp terminal.

(B) a print head origin moving step for moving the print head (10H) of the 3D printer (10) to a predetermined point (origin) above the terminal crimping portion (TK) of the crimp terminal (T);
(2) An anticorrosion resin 1 layer forming step of forming an anticorrosion resin layer by moving the print head in a predetermined direction from the origin while discharging the anticorrosion resin (B) from the print head to the front side of the terminal caulking portion; ,
(3) The print head is moved in the XYZ directions and the anticorrosion resin (B) is discharged, and the anticorrosion resin layer having a predetermined thickness is connected to the anticorrosion resin one layer formed in the anticorrosion resin one layer forming step. An anti-corrosion resin layer entire surface forming step to be formed on the entire front surface of the crimped portion;
(4) The print head is rotated around the terminal crimping portion (TK) of the crimp terminal (T), and the steps (2) and (3) are successively performed on both side surfaces and the back surface of the terminal crimping portion. The anticorrosion resin layer all-round formation step for forming the anticorrosion resin layer having a predetermined thickness on the entire circumference of the terminal caulking portion,
By performing anticorrosion part resin molding on the terminal crimping part of the crimp terminal.

According to the above inventions (A) and (B), even if a mold structure is not used, a 3D printer covers 360 degrees around the crimping part where the crimping terminal and the aluminum wire are in contact and the aluminum wire exposed part. Since the anticorrosion part by the anticorrosion resin B can be formed, moisture does not permeate the inside, and the waterproof function is achieved.
Therefore, a precise mold structure that matches the terminal shape is not required, and since no mold is used, various terminal shapes can be accommodated. There is no need to consider gate position setting, taper formation for mold release, sink marks, etc., which are peculiar points to mold molding when using molds, and a necessary and sufficient resin thickness is formed at the necessary locations. can do.
Since the details of the terminal shape and dimensions of the other company's crimp terminals are not disclosed, it was difficult to use a mold, but the other company's crimp terminals can also be formed to prevent corrosion, so the use of aluminum wires can be expanded. Connected.

1A is a perspective view of a crimp terminal in which an anticorrosion part is formed by the anticorrosion part forming method according to the present invention, and FIG. 1B is a cross-sectional view taken along the line 1B-1B in FIG. 2 (1) to 2 (4) are front views of crimp terminals in the vicinity of a crimp terminal for explaining a process procedure of the anticorrosion part molding method according to Embodiment 1 of the present invention. 3A is a conceptual diagram for explaining the first embodiment of the present invention, and FIG. 3B is a conceptual diagram for explaining the second embodiment. 4 (1) to 4 (4) are front views of the vicinity of a crimp terminal (crimp terminals are cross-sectional views) for explaining the process procedure of the anticorrosion part molding method according to Embodiment 2 of the present invention. FIG. 5A is a perspective view of a terminal fitting obtained by crimping a crimp terminal to a covered electric wire, and FIG. . FIG. 6 is a side sectional view for explaining a waterproofing process by a conventional mold method, and FIGS. 6A and 6A are views of FIG. 2) is immediately after the start of injection. FIG. 6B is a side view of the crimp terminal covered with the anticorrosion resin.

  Hereinafter, a method for forming an anticorrosion part according to the present invention in which a crimp terminal can be covered with an anticorrosion resin and waterproofed without using a mold will be described with reference to FIGS.

<Crimp terminal with anticorrosion formed by the method of the present invention>
FIG. 1A is a perspective view of a crimp terminal in which an anticorrosion part (resin) is formed by the anticorrosion part forming method according to the present invention. The coating of the end of the covered electric wire W is peeled to expose the core wire, the terminal crimping portion of the crimp terminal T is crimped to the core wire, and the terminal crimping portion is anticorrosive by the method using the 3D (three-dimensional) printer of the present invention. Part B is molded.
In FIG. 1 (A), it is not known how the anticorrosion resin B is formed at the portion where the terminal crimping portion of the crimp terminal T is crimped by crimping the core wire, but as seen from the arrow 1B-1B in FIG. 1 (A). According to FIG. 1 (B) which is a cross-sectional view, it can be seen that the terminal caulking portion TK of the crimp terminal T caulks the core wire WC from which the coating has been peeled, and the anticorrosion resin B firmly covers the periphery thereof. That is, the anticorrosion resin B is a part of the covering portion WH (FIG. 1A) of the covered electric wire W, the terminal caulking portion TK, the tip WS of the core wire WC, and the front side (core wire placement side) of the crimp terminal T. Each of the TF and a part of the back side TR of the crimp terminal T is covered. This prevents moisture from penetrating into the interior and provides a waterproof function.

<Anticorrosion resin molding method according to the present invention>
Embodiment 1 and 2 of the method of this invention which shape | molds the above anticorrosion resin to a crimp terminal are demonstrated. First, the first embodiment will be described.

<Embodiment 1>
2 (1) to 2 (4) are diagrams for explaining a process procedure of the anticorrosion resin molding method according to Embodiment 1 of the present invention. In FIG. 2A, reference numeral 10 denotes a 3D printer. The 3D printer 10 is a device that forms a three-dimensional object based on 3D CAD and 3DCG data, unlike a printer that prints two-dimensionally on ordinary paper. Create a three-dimensional object by stacking. The method of lamination is as follows: (1) The liquid resin is irradiated with ultraviolet rays and cured gradually, (2) The heat-melted resin is stacked little by little, (3) The powder resin is adhesive There are methods such as spraying, and any method may be adopted here.
By importing 3D CAD data and 3DCG data into a 3D printer, the print head 10H of the 3D printer 10 moves in the X direction on the plane, the Y direction perpendicular to the X direction, and the Z direction perpendicular to the XY plane, while being anticorrosive resin. Go out. By changing the number of laminations in the Z direction, it can be created in a desired shape. It is also possible to control the stack thickness by controlling the moving speed and the discharge amount.

<Formation of one layer in the X direction of the anticorrosion resin layer>
In FIG. 2A, the print head 10H of the 3D printer 10 is moved to the origin in the X and Y directions above the discharge area of the terminal crimping portion TK of the crimp terminal T to be printed.
2 (2), the 3D printer 10 moves in the X direction from the origin while the anticorrosion resin B is printed from the print head 10H, the terminal crimping portion TK of the crimp terminal T to be printed, the tip WS of the core wire WC, and the crimp terminal T. Are sequentially discharged to the front end TF.

<Formation of anti-corrosion resin layer in Y direction>
When it reaches the end of the discharge area in the X direction, it moves in the Y direction (in the figure perpendicular to the page, the black circle in the circle moves from the page to the front, the x in the circle moves from the page to the back. And the anticorrosion resin B from the print head 10H again on the anticorrosion resin layer previously ejected while moving in the reverse X direction from that position. Discharge.
When the end of the discharge area in the reverse X direction is reached, the anticorrosion resin layer in which the anticorrosion resin B is laminated from the print head 10H while moving in the Y direction (backward) by one pitch and moving in the X direction again from that position. Dispense further onto the top.

<Formation of first layer on XY plane of anticorrosion resin layer>
Hereinafter, when this process is repeated to reach the end of the discharge region in the rear direction in the Y direction, one anticorrosion resin layer is formed on the XY plane.
Therefore, this time, the print head 10H of the 3D printer 10 moves in the direction away from the discharge target in the Z direction by one pitch, and moves again in the X direction from that position, while the anticorrosive resin layer already laminated for one layer is formed. The anticorrosion resin B is further discharged on the top.

<Formation of second layer of anticorrosion resin layer>
Then, when reaching the end of the discharge area in the X direction, it moves forward by one pitch in the Y direction, and again moves the anticorrosion resin B from the print head 10H while moving in the reverse X direction from that position. Dispense further up.
When it reaches the end of the discharge region in the reverse X direction, it moves further in the Y direction (front) by one pitch, and further discharges the anticorrosion resin B onto the anticorrosion resin layer while moving in the X direction again from that position.
Hereinafter, when this process is repeated to reach the end of the discharge area in the front direction in the Y direction, two anticorrosion resin layers are formed on the XY plane.

<Formation of anticorrosion resin layer with desired thickness>
Therefore, this time, the print head 10H of the 3D printer 10 moves further in the direction away from the discharge target in the Z direction by one pitch, and moves again in the X direction from that position. The anticorrosion resin B is further discharged on the top.
Hereinafter, when this is repeated to reach the end of the discharge region in the Z direction, the anticorrosion resin layer having a desired thickness is formed on the terminal crimping portion side of the crimp terminal as shown in FIG. .
In addition, the part from which the thickness of the anticorrosion resin layer differs in the figure is made to discharge the anticorrosion resin B by the number of layers of different thickness in the XYZ direction.

<Formation of anticorrosion resin layer on the side of crimp terminal>
When the anticorrosion resin layer having a desired thickness is formed on the front (front) side of the crimping terminal of the crimp terminal as shown in FIG. 2 (3), the crimp terminal T is then rotated 90 degrees. Similarly, an anticorrosion resin layer having a desired thickness is formed on the side surface of the crimp terminal.

<Formation of anticorrosion resin layer on the back surface of crimp terminal>
After the anticorrosion resin layer having a desired thickness is formed on the side surface of the crimp terminal of the crimp terminal, the crimp terminal T is further rotated 90 degrees, and the back surface TR of the crimp terminal is 3D as shown in FIG. The anticorrosion resin B is ejected from the print head 10H of the 3D printer 10 to the crimp terminal rear surface TR toward the printer 10, and the anticorrosion resin layer B having a desired thickness is formed in the same manner.

<Formation of anticorrosion resin layer on the side of crimp terminal>
After the anticorrosion resin B is discharged to the crimping terminal rear surface TR to form the anticorrosion resin layer B having a desired thickness, the crimping terminal T is then rotated by 90 degrees, and the opposite side surface of the crimping terminal is similarly applied. An anticorrosion resin layer having a desired thickness is formed.
By doing in this way, finally, the anticorrosion resin B is shape | molded in the perimeter of the terminal crimping part of the crimp terminal T of the front-end | tip part of the covered electric wire W of FIG. 1 (A), and, thereby, a water | moisture content osmose | permeates inside. The waterproof function is secured.

<Advantages of the present invention>
As described above, according to the present invention, even without using a mold structure, the anticorrosion resin is used in a 3D printer over 360 degrees around the crimping portion where the crimping terminal and the aluminum wire are in contact with each other and the exposed portion of the aluminum wire. Since the anticorrosion resin by B can be formed, moisture does not permeate the inside, and a waterproof function is achieved. Therefore, a precise mold structure that matches the terminal shape is not required, and since no mold is used, various terminal shapes can be accommodated. Since the details of the terminal shape and dimensions of the other company's crimp terminals are not disclosed, it was difficult to use a mold, but the other company's crimp terminals can also be formed to prevent corrosion, so the use of aluminum wires can be expanded. Connected.

<Summary of Embodiment 1>
The above is the first embodiment. FIG. 3A is a conceptual diagram for explaining the first embodiment after the crimp terminal T is placed under the print head 10H of the 3D printer 10 and the anticorrosion resin B is formed on the surface of the crimp terminal T directly below. Rotate the crimp terminal T by 90 degrees to place another surface of the crimp terminal T under the print head 10H again, and form the anticorrosion resin by the anticorrosion resin B on the surface of the crimp terminal T immediately below. After the formation, the crimp terminal T is rotated 90 degrees again to place another surface of the crimp terminal T under the print head 10H, and the anticorrosion resin B is formed on the surface of the crimp terminal T directly below. By repeating this four times, the anticorrosion resin can be formed over 360 degrees around the crimp terminal T. In order to form the anticorrosion resin more finely, the anticorrosion resin may be formed every 45 degrees instead of 90 degrees.

<Modification of Embodiment 1>
In the first embodiment, the anticorrosion resin is formed on the entire surface of one surface of the crimp terminal T and then the crimp terminal T is rotated to form the anticorrosion resin on the other surface of the crimp terminal T. As a modification of 1, the anti-corrosion resin is formed in one row and one layer over the entire circumference of the crimp terminal T while slowly rotating the crimp terminal T under the print head 10H. After the print head 10H is moved by 1 pitch to the back side of the right-angle direction, the crimp terminal T is always rotated slowly so that the anticorrosion resin is similarly formed in one row and one layer next to the previous anticorrosion resin. When proceeding to the end of the discharge area of the terminal crimping portion of the crimp terminal T in the direction, one layer of the anticorrosion resin is formed in the Y direction over the entire circumference of the crimp terminal T.
This time, when the same is repeated when the print head 10H returns, two layers of anticorrosion resin are formed.
By repeating the above process and reciprocating the print head 10H a plurality of times, the anticorrosion resin having a desired thickness can be formed on the entire surface of the crimp terminal T.
In the above, the print head 10H has moved one pitch in the Y direction after forming one layer of anticorrosion resin over the entire circumference 360 ° of the crimp terminal T. The print head 10H may move one pitch in the Y direction after forming a row of thick anticorrosion resins.

<Embodiment 2>
FIG. 3B is a conceptual diagram illustrating the second embodiment.
In the first embodiment, the crimp terminal T is rotated under the print head 10H of the 3D printer 10, but in the second embodiment, the crimp terminal T is fixed at the center, and the print head 10H moves 360 degrees around the crimp terminal T. On the other hand, the anticorrosion resin B is formed on the surface of the crimp terminal T by the anticorrosion resin B.

4 (1) to 4 (4) are diagrams illustrating the process steps of the anticorrosion resin molding method according to Embodiment 2 of the present invention described above.
<Formation of one layer in the X direction of the anticorrosion resin layer>
In FIG. 4A, the print head 10H of the 3D printer 10 is moved to the origin in the X and Y directions above the discharge area of the terminal crimping portion TK of the crimp terminal T to be printed.
4 (2), the 3D printer 10 moves in the X direction from the origin while the anticorrosion resin B is printed from the print head 10H, the terminal crimping portion TK of the crimp terminal T to be printed, the tip WS of the core wire WC, and the crimp terminal T. Are sequentially discharged to the front end TF.

<Formation of anti-corrosion resin layer in Y direction>
When it reaches the end of the discharge area in the X direction, it moves by one pitch in the Y direction (here, tentatively here), and the anti-corrosion resin B is once again applied from the print head 10H while moving in the reverse X direction from that position. It discharges further on the discharged anticorrosion resin layer.
When the end of the discharge area in the reverse X direction is reached, the anticorrosion resin layer in which the anticorrosion resin B is laminated from the print head 10H while moving in the Y direction (backward) by one pitch and moving in the X direction again from that position. Dispense further onto the top.

<Formation of first layer on XY plane of anticorrosion resin layer>
Hereinafter, when this process is repeated to reach the end of the discharge region in the rear direction in the Y direction, one anticorrosion resin layer is formed on the XY plane.
Therefore, this time, the print head 10H of the 3D printer 10 moves in the direction away from the discharge target in the Z direction by one pitch, and moves again in the X direction from that position, while the anticorrosive resin layer already laminated for one layer is formed. The anticorrosion resin B is further discharged on the top.

<Formation of second layer of anticorrosion resin layer>
Then, when reaching the end of the discharge area in the X direction, it moves forward by one pitch in the Y direction, and again moves the anticorrosion resin B from the print head 10H while moving in the reverse X direction from that position. Dispense further up.
When it reaches the end of the discharge region in the reverse X direction, it moves further in the Y direction (front) by one pitch, and further discharges the anticorrosion resin B onto the anticorrosion resin layer while moving in the X direction again from that position.
Hereinafter, when this process is repeated to reach the end of the discharge area in the front direction in the Y direction, two anticorrosion resin layers are formed on the XY plane.

<Formation of desired thickness layer of anticorrosion resin layer>
Therefore, this time, the print head 10H of the 3D printer 10 moves further in the direction away from the discharge target in the Z direction by one pitch, and moves again in the X direction from that position. The anticorrosion resin B is further discharged on the top.
Hereinafter, when this is repeated and the end of the discharge region in the Z direction is reached, the anticorrosion resin layer having a desired thickness is formed on the terminal crimping portion side of the crimp terminal as shown in FIG. .
In addition, the part from which the thickness of the anticorrosion resin layer differs in the figure is made to discharge the anticorrosion resin B by the number of layers of different thickness in the XYZ direction.

<Formation of anticorrosion resin layer on the side of crimp terminal>
When the anticorrosion resin layer having a desired thickness is formed on the terminal crimping portion side of the crimp terminal as shown in FIG. 4 (3), the print head 10H of the 3D printer 10 is then rotated 90 degrees to provide the crimp terminal. Similarly, an anticorrosion resin layer having a desired thickness is formed on the side surface of the substrate.

<Formation of anticorrosion resin layer on the back surface of crimp terminal>
When the anticorrosion resin layer having a desired thickness is formed on the side surface of the crimp terminal, the print head 10H of the 3D printer 10 is further rotated by 90 degrees to bring the crimp terminal back TR side as shown in FIG. The 3D printer 10 is moved. Then, the anticorrosion resin B is discharged upward from the print head 10H of the 3D printer 10 toward the crimp terminal rear surface TR, and similarly, the anticorrosion resin layer B having a desired thickness is formed.

<Formation of anticorrosion resin layer on the side of crimp terminal>
After the anticorrosion resin B is ejected onto the back surface TR of the crimp terminal to form the anticorrosion resin layer B having a desired thickness, finally, the print head 10H of the 3D printer 10 is further rotated 90 degrees to the opposite side surface of the crimp terminal. Similarly, an anticorrosion resin layer having a desired thickness is formed.
By doing in this way, finally, the anticorrosion resin B is molded around the terminal crimping portion of the crimp terminal T at the tip of the covered wire W in FIG. 1 (A), so that moisture penetrates into the inside. And the waterproof function is secured.

<Summary>
As described above, according to the present invention, even without using a mold structure, the anticorrosion resin is used in a 3D printer over 360 degrees around the crimping portion where the crimping terminal and the aluminum wire are in contact with each other and the exposed portion of the aluminum wire. Since the anticorrosion resin by B can be formed, moisture does not permeate the inside, and a waterproof function is achieved.
Therefore, a precise mold structure that matches the terminal shape is not required, and since no mold is used, various terminal shapes can be accommodated. There is no need to consider gate position setting, taper formation for mold release, sink marks, etc., which are peculiar points to mold molding when using molds, and a necessary and sufficient resin thickness is formed at the necessary locations. can do.
Since the details of the terminal shape and dimensions of the other company's crimp terminals are not disclosed, it was difficult to use a mold, but the other company's crimp terminals can also be formed to prevent corrosion, so the use of aluminum wires can be expanded. Connected.

10 3D (three-dimensional) printer 10H Print head B Anticorrosion resin W Coated electric wire WC Core wire WH Coated portion WS Core wire tip T Crimp terminal TK Terminal caulking portion TF Part of crimp terminal front side Part of crimp terminal back side

Claims (2)

(1) a print head origin moving step for moving the print head of the 3D printer to a predetermined point (origin) above the terminal crimping portion of the crimp terminal;
(2) An anticorrosion resin 1 layer forming step of forming one anticorrosion resin layer by moving the printhead in a predetermined direction from the origin while discharging the anticorrosion resin from the printhead to the front side of the terminal caulking portion;
(3) The print head is moved in the XYZ directions and the anticorrosion resin is ejected to connect the anticorrosion resin 1 layer formed in the anticorrosion resin 1 layer forming step so that the anticorrosion resin layer having a predetermined thickness is formed on the terminal caulking portion. An anti-corrosion resin layer entire surface forming step to be formed on the entire front surface;
(4) The terminal crimping portion of the crimp terminal is rotated, and the step (2) and the step (3) are sequentially performed on both side surfaces and the back surface of the terminal crimping portion, so that the anticorrosion resin layer having a predetermined thickness is formed. An anti-corrosion resin layer all-round formation step formed on the entire circumference of the terminal crimping portion;
Thus, the anticorrosion resin molding method is characterized in that the anticorrosion resin molding is performed on the terminal crimping portion of the crimp terminal. (1) a print head origin moving step for moving the print head of the 3D printer to a predetermined point (origin) above the terminal crimping portion of the crimp terminal;
(2) An anticorrosion resin 1 layer forming step of forming one anticorrosion resin layer by moving the printhead in a predetermined direction from the origin while discharging the anticorrosion resin from the printhead to the front side of the terminal caulking portion;
(3) The print head is moved in the XYZ directions and the anticorrosion resin is ejected to connect the anticorrosion resin 1 layer formed in the anticorrosion resin 1 layer forming step so that the anticorrosion resin layer having a predetermined thickness is formed on the terminal caulking portion. An anti-corrosion resin layer entire surface forming step to be formed on the entire front surface;
(4) The print head is rotated around the terminal crimping portion of the crimp terminal, and the step (2) and the step (3) are sequentially performed on both side surfaces and the back surface of the terminal crimping portion. An anti-corrosion resin layer all-round formation step for forming a thickness anti-corrosion resin layer on the entire circumference of the terminal caulking portion;
Thus, the anticorrosion resin molding method is characterized in that the anticorrosion resin molding is performed on the terminal crimping portion of the crimp terminal.

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