An ESP shell pin wire bending prevention processing technology

Abstract

The present application relates to the technical field of pin wire anti-bending processing, in particular to an ESP shell pin wire anti-bending processing technology, which comprises the following steps: producing a continuous body pin through a punching process; placing the continuous body pin into a specific cavity of a single injection mold; wrapping the corner of the continuous body pin to form a plastic forming part through an injection molding process; assembling and fixing the injection molded pin single piece into a special inlay; integrally installing the inlay loaded with the pin single piece into a corresponding cavity of a shell injection mold; starting an injection molding machine, injecting molten plastic into the closed shell injection mold, and producing a complete ESP shell integrated with the pin single piece. The ESP shell pin wire anti-bending processing technology integrates the continuous body pin through a continuous mold, and then forms a protective structure by wrapping the pin corner through single injection, thereby avoiding the bending and deformation of the pin during transportation and assembly from the source, reducing the bending of the pin wire, processing qualified ESP shells, and reducing the generation rate of defective products.

Description

Technical Field

[0001] This invention relates to the field of pin wire anti-bending processing technology, specifically to an ESP housing pin wire anti-bending processing process. Background Technology

[0002] When using a sensor, the connection point of its wiring port needs to be equipped with pins. Previously, the manufacturing method involved pre-bending multiple pins to a specific angle. (See details...) Figure 1 The structures shown are manually assembled one by one and pressed into the corresponding holes of the inserts. See details... Figure 2 The structure described above is then assembled, and the pre-assembled pin insert is inserted into the injection mold cavity of the housing for subsequent injection molding. However, this traditional process of assembling pins one by one places excessive demands on the operator's hand stability and precision assembly skills, and the operating space is usually quite cramped. During assembly, even slight carelessness, such as uneven force, angle deviation, or minor interference, can easily cause one or more delicate pins to bend or deform. Once the pins are bent, it not only affects the reliability of their soldering to subsequent circuit boards but also causes the entire sensor housing assembly to fail in subsequent electrical testing or functional verification, resulting in a large number of defective products on the production line, increasing material waste and production costs.

[0003] Therefore, it is necessary to design an anti-bending processing technology for ESP housing pin wires to reduce pin wire bending, produce qualified ESP housings, and reduce the rate of defective products. Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the purpose of this invention is to provide an anti-bending processing technology for ESP housing pin wires, thereby reducing pin wire bending, producing qualified ESP housings, and reducing the generation of defective products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides an ESP housing pin wire anti-bending processing technology, comprising the following steps: S1: A continuous insert produced by a punching process; S2: The above-mentioned continuous pin is placed into a specific cavity of the single injection mold, and the corner of the continuous pin is wrapped by the injection molding process to form a plastic molding part, thereby forming a structurally stable pin single part. S3: Assemble and fix the injection-molded lead unit into the dedicated insert; S4: Install the insert with the pre-loaded pin individual components into the corresponding cavity of the housing injection mold, ensuring that the position and orientation of the pins are completely matched with the mold cavity; S5: Start the injection molding machine and inject molten plastic into the closed housing injection mold. After cooling and solidification, the plastic solution combines with the pre-placed pin individual components to form a complete ESP housing with integrated pin individual components.

[0006] Preferably, in step one, the continuous insert produced by the blanking process is equipped with sheet metal raw material. The sheet metal is blanked by a stamping die driven by a stamping press to process the required insert strip plate. The blanked insert strip plate is sent to the electroplating production line. The electroplated insert strip plate is then bent and cut again by a special stamping die to form the continuous insert.

[0007] Preferably, in the process of stamping sheet metal by driving a stamping die through a stamping press, the precise cutting edge of the die is used to stamp the sheet metal material into a pin strip containing multiple pin units that are interconnected.

[0008] Preferably, the single injection mold includes multiple injection units, which are connected by flow channels, and an injection hole is connected to the center of the flow channels.

[0009] Preferably, each injection molding unit includes an upper unit and a lower unit, which are snapped together to form an injection cavity. The lower unit is provided with a snap-fit ​​groove for snapping onto end pin one, and a socket for snapping into end pin two.

[0010] Preferably, one end is provided with a post for engaging the middle part of the continuous body pin, and the continuous body pin is provided with a locking hole for inserting the post.

[0011] Preferably, the lower monomer has an injection hole on its side for injecting plastic solution into the injection cavity, and the injection hole is connected to the flow channel.

[0012] Preferably, the insert includes a foot for inserting into a hole and a positioning groove for locking the side of the housing injection mold.

[0013] Preferably, the lower mold of the housing injection mold is fixedly provided with a snap-fit ​​block and a positioning post for inserting the insert. The insert is provided with a slot for the positioning post to be snapped into. The housing injection mold is fixedly provided with a snap-fit ​​block. The insertion hole three is fixedly provided with an insertion hole three for inserting the end leg two from top to bottom. When the end of the positioning post is inserted into the slot, there is a gap between the bottom of the end leg two and the top of the insertion hole three.

[0014] Preferably, the lower mold of the housing injection mold is also provided with a locking rod that can move linearly. The end of the locking rod has a beveled structure, and the contour of the positioning groove is the same as the end contour of the locking rod.

[0015] The beneficial effects of this invention are as follows: the ESP housing pin bending prevention processing technology uses a continuous mold to integrally form a continuous pin, and then uses a single-piece injection molding to wrap the pin corner to form a protective structure, which avoids bending and deformation of the pin during transportation and assembly from the source, reduces pin bending, produces qualified ESP housings, and reduces the rate of defective products. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 For existing pins.

[0018] Figure 2 A three-dimensional structural diagram of inserting an inlay into an existing pin.

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the pin and plate.

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of a continuum insert.

[0021] Figure 5 A three-dimensional structural diagram of the lead-angle single component being installed into the inlay.

[0022] Figure 6 This is a three-dimensional structural diagram of a single injection mold.

[0023] Figure 7 This is an exploded three-dimensional structural diagram of a single injection mold.

[0024] Figure 8 This is an exploded view of the three-dimensional structure of the injection molding monomer.

[0025] Figure 9 This is a schematic diagram showing the process before and after injection molding of a continuous body with insert pins.

[0026] Figure 10 This is a schematic diagram of the installation of the continuum pin.

[0027] Figure 11 This is a schematic diagram of the three-dimensional structure of the lead-in single component.

[0028] Figure 12 This is a partial schematic diagram of the injection mold for the housing.

[0029] Figure 13 This is a schematic diagram showing the connection between the insert and the housing injection mold.

[0030] Figure 14 This is a schematic diagram of the installation of the insert.

[0031] Figure 15 This is a schematic diagram of the three-dimensional structure of the inlay.

[0032] Figure 16 This is a schematic diagram showing the insertion of the locking rod and the insert.

[0033] Figure 17 Schematic diagram of the ESP housing Figure 1 .

[0034] Figure 18 Schematic diagram of the ESP housing Figure 2 .

[0035] Explanation of reference numerals in the attached drawings: 1. Continuous pin; 1a. End foot one; 1b. End foot two; 2. Single-unit injection mold; 2a. Injection unit; 2a1. Upper unit; 2a2. Lower unit; 2a3. Snap-fit ​​groove; 2a4. Insertion hole one; 2a5. Insert post; 2b. Runner; 2c. Injection hole; 3. Lead-angle single-unit component; 3a. Plastic molding part; 4. Insert; 4a. Insertion hole two; 4b. Positioning groove; 4c. Snap-fit ​​groove; 5. Pin with plate; 6. Housing injection mold; 6a. Snap-fit ​​block; 6a1. Insertion hole three; 6b. Positioning post; 6c. Snap-fit ​​rod; 7. ESP housing. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example: This invention provides a process for preventing bending of ESP housing pin wires, such as... Figure 1-18 As shown, it includes the following steps: S1: A continuous insert 1 produced by a punching process; such as... Figure 4 As shown, the final stamped product will have this shape. This process involves stamping from a strip of sheet metal to... Figure 3 The aforementioned state, then from Figure 3 Cut to Figure 4 The aforementioned state is achieved through punching using a continuous die.

[0038] S2: The continuous pin 1 is placed into a specific cavity of the single injection mold 2. The corners of the continuous pin 1 are then wrapped using injection molding to form a plastic molding part 3a, thus forming a structurally stable pin unit 3. The continuous pin 1 is manually assembled into the single injection mold 2 because its small size makes it impossible to use a robotic arm. By using injection molding to wrap the corners of the continuous pin 1, bending during subsequent processes is prevented, while the exposed leads 1a and 1b are less prone to bending. Furthermore, the injection-wrapping method ensures good heat fusion with the molten plastic during subsequent injection molding, preventing cracking.

[0039] S3: Assemble and fix the injection-molded lead unit 3 into the dedicated insert 4; S4: Install the insert 4, which has been loaded with the pin unit 3, into the corresponding cavity of the housing injection mold 6 to ensure that the position and orientation of the pin are completely matched with the mold cavity; S5: Start the injection molding machine and inject molten plastic into the closed injection mold 6. After cooling and solidification, the plastic solution combines with the pre-placed pin unit 3 to form a complete ESP housing 7 integrating the pin unit 3. The entire process is compared to... Figure 1 and Figure 2 Traditional assembly methods can reduce pin wire bending, produce qualified ESP housings, and reduce the rate of defective products.

[0040] In step one, the continuous pin 1 produced by the stamping process is equipped with sheet metal raw material. The sheet metal is stamped by a stamping die driven by a stamping press to process the required pin strip plate 5. The stamped pin strip plate 5 is sent to the electroplating production line for electrochemical treatment, such as tin plating or nickel plating, to enhance the conductivity, corrosion resistance and weldability of the pin. The electroplated pin strip plate 5 is then bent and cut again by a special stamping die, so that the pin units on the pin strip plate 5 are bent at a preset angle and shape, and simultaneously cut precisely from the connecting strip, thereby forming a series of independent but continuously processed pin individuals, forming the continuous pin 1.

[0041] In the process of blanking sheet metal by driving a stamping die through a stamping press, the precise cutting edge of the die is used to stamp the sheet metal material into a pin strip plate 5 containing multiple interconnected pin units. See details... Figure 3 As shown, progressive die punching and bending is a relatively common method, and the required mold can be easily designed according to the product's appearance.

[0042] The single-unit injection mold 2 includes multiple injection units 2a, which are connected by flow channels 2b, with an injection hole 2c connected to the center of the flow channels 2b. By injecting plastic solution along the injection hole 2c, the solution flows along the flow channels 2b into the multiple injection units 2a respectively. Multiple pin-shaped single-unit parts 3 can be processed in one injection, wherein the injection molding part is the plastic molding part 3a.

[0043] Each injection molding unit 2a includes an upper unit 2a1 and a lower unit 2a2, which are snapped together to form an injection cavity. The lower unit 2a2 has a snap-fit ​​groove 2a3 for snapping onto end pin 1a and an insertion hole 2a4 for snapping onto end pin 2b. The insertion hole 2a4 protects the end pin 2b inserted into it, preventing the plastic solution from contacting it and ensuring that the metal part does not leak out. Since the continuous body pin 1 has a right-angled structure, it must have an end pin 1a in a horizontal state. When the continuous body pin 1 is snapped into the lower unit 2a2, it is snapped in from top to bottom, so that end pin 1a is snapped into the snap-fit ​​groove 2a3. After the upper unit 2a1 is pressed down onto the lower unit 2a2, the part of end pin 1a that is snapped into the snap-fit ​​groove 2a3 is protected to prevent the plastic solution from contacting it.

[0044] The end foot 1a is provided with a post 2a5 for engaging the middle part of the continuous body pin 1. The continuous body pin 1 has a locking hole for inserting the post 2a5. At the same time, the post 2a5 engages with the continuous body pin 1 to position the middle part. That is, before the locking groove 2a3 is engaged with the end foot 1a, the position of the continuous body pin 1 can be aligned by the post 2a5, which improves the accuracy and facilitates control during installation.

[0045] The lower monomer 2a2 has an injection hole 2c on its side for injecting molten plastic into the injection cavity. The injection hole 2c is connected to the flow channel 2b. The molten plastic flows through the flow channel 2b and along the injection hole 2c into the interior of the injection monomer 2a, thereby realizing the injection molding of the plastic molding part 3a.

[0046] The insert 4 includes a prong 1a for insertion into a socket 4a and a positioning groove 4b for locking the side of the housing injection mold 6. First, the worker inserts the prong 1a into the socket 4a, then the insert 4 is installed into the housing injection mold 6. After installation, the positioning groove 4b is locked by the housing injection mold 6 to achieve the positioning and installation of the insert 4. Subsequently, injection molding is performed using the housing injection mold 6 to produce the required ESP housing 7.

[0047] The lower mold of the housing injection mold 6 is fixedly equipped with a snap-fit ​​block 6a and a positioning post 6b for inserting the insert 4. The insert 4 has a slot 4c for the positioning post 6b to be inserted into. The housing injection mold 6 is fixedly equipped with a snap-fit ​​block 6a, and a third insertion hole 6a1 is fixedly equipped with a second end 1b for insertion from top to bottom. When the end of the positioning post 6b is inserted into the slot 4c, there is a gap between the bottom of the second end 1b and the top of the third insertion hole 6a1. When installing the insert 4, since it is installed inside the mold and the space is narrow, the second end 1b is positioned by the slot 4c and the positioning post 6b, and then inserted into the third insertion hole 6a1. This allows the worker to complete the operation with one hand without having to go all the way between the upper and lower molds, making it safer and more convenient. As can be seen from the attached figure, the top of the third insertion hole 6a1 has a sloping structure to guide the insertion of the second end 1b, allowing it to be inserted even with slight bending.

[0048] The lower mold of the housing injection mold 6 is also equipped with a linearly movable locking rod 6c. The end of the locking rod 6c has a beveled structure, and the contour of the positioning groove 4b is the same as the end contour of the locking rod 6c. Since there will be a slight gap between the insert 4 and the positioning post 6b during assembly to facilitate installation, the locking rod 6c is pushed into the positioning groove 4b during the mold closing process. Through the guiding effect of the bevel, the position of the insert 4 can be precisely locked.

[0049] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A process for preventing bending of ESP housing pin wires, characterized in that, Includes the following steps: S1: A continuous insert (1) produced by a punching process. S2: The above-mentioned continuous pin (1) is placed into a specific cavity of the single injection mold (2), and the corner of the continuous pin (1) is wrapped by the injection molding process to form a plastic molding part (3a), thereby forming a structurally stable pin single part (3). S3: Assemble and fix the injection-molded pin unit (3) into the dedicated insert (4); S4: Install the insert (4) with the pin unit (3) loaded into the corresponding cavity of the housing injection mold (6) to ensure that the position and orientation of the pin are completely matched with the mold cavity; S5: Start the injection molding machine and inject molten plastic into the closed housing injection mold (6). After cooling and solidification, the plastic solution combines with the pre-placed pin unit (3) to form a complete ESP housing (7) that integrates the pin unit (3).

2. The anti-bending processing technology for ESP housing pin wires as described in claim 1, characterized in that, In step one, the continuous insert (1) produced by the punching process is equipped with sheet metal raw materials. The sheet metal is punched by the stamping die driven by the stamping press to process the required insert strip plate (5). The punched insert strip plate (5) is sent to the electroplating production line. The electroplated insert strip plate (5) is bent and cut again by a special stamping die to form the continuous insert (1).

3. The anti-bending processing technology for ESP housing pin wires as described in any one of claims 1 or 2, characterized in that, In the process of punching sheet metal by driving a stamping die through a stamping press, the sheet metal material is stamped into a pin strip plate (5) containing multiple pin units that are interconnected, using the precise cutting edge of the die.

4. The anti-bending processing technology for ESP housing pin wires as described in claim 3, characterized in that, The single injection mold (2) includes multiple injection single units (2a), which are connected by flow channels (2b), and an injection hole (2c) is connected at the center of the flow channel (2b).

5. The anti-bending processing technology for ESP housing pin wires as described in claim 4, characterized in that, Each injection molding unit (2a) includes an upper unit (2a1) and a lower unit (2a2). The upper unit (2a1) and the lower unit (2a2) are snapped together to form an injection cavity. The lower unit (2a2) is provided with a snap-fit ​​groove (2a3) for snapping onto end pin one (1a) and a socket one (2a4) for snapping into end pin two (1b).

6. The anti-bending processing technology for ESP housing pin wires as described in claim 5, characterized in that, The end foot (1a) is provided with a post (2a5) for engaging the middle part of the continuous body pin (1), and the continuous body pin (1) is provided with a locking hole for inserting the post (2a5).

7. The anti-bending processing technology for ESP housing pin wires as described in claim 6, characterized in that, The lower monomer (2a2) has an injection hole (2c) on its side for injecting plastic solution into the injection cavity, and the injection hole (2c) is connected to the flow channel (2b).

8. The anti-bending processing technology for ESP housing pin wires as described in claim 1, characterized in that, The insert (4) includes a positioning groove (4b) for inserting the first end foot (1a) into the second insertion hole (4a) and for locking the side of the housing injection mold (6).

9. The anti-bending processing technology for ESP housing pin wires as described in claim 8, characterized in that, The lower mold of the housing injection mold (6) is fixedly provided with a snap-fit ​​block (6a) and a positioning post (6b) for inserting the insert (4). The insert (4) is provided with a slot (4c) for the positioning post (6b) to be snapped into. The housing injection mold (6) is fixedly provided with a snap-fit ​​block (6a). The insertion hole three (6a1) is fixedly provided with an insertion hole three (6a1) for inserting the end foot two (1b) from top to bottom. When the end of the positioning post (6b) is inserted into the slot (4c), there is a gap between the bottom of the end foot two (1b) and the top of the insertion hole three (6a1).

10. The anti-bending processing technology for ESP housing pin wires as described in claim 9, characterized in that, The lower mold of the housing injection mold (6) is also provided with a snap-fit ​​rod (6c) that can move linearly. The end of the snap-fit ​​rod (6c) is a bevel structure, and the contour of the positioning groove (4b) is the same as the end contour of the snap-fit ​​rod (6c).

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