Injection molding device for rapid molding of flat cable protection rubber block

Abstract

The utility model discloses an injection molding device for rapid molding of flat cable protection rubber blocks, which comprises an annular operation runner and a plurality of wire harness jigs, and the wire harness jigs are transferred on the annular operation runner; the annular operation runner is provided with an injection molding area, the injection molding area is provided with a first injection mold, and the wire harness jig is provided with a second injection mold matched with the first injection mold. And the first injection mold and the second injection mold are spliced to form at least one first cavity for injection molding of a protective rubber block and at least one second cavity for injection molding of a wire protection sleeve. According to the utility model, through the matching design of the annular operation runner and the double-cavity mold, the synchronous injection molding of the protective rubber block and the wire protection sleeve is realized; the method has the advantages of improving the machining efficiency and reducing repeated positioning errors.

Description

Technical Field

[0001] This utility model relates to wire harness connector production equipment, specifically to an injection molding device that allows for rapid molding of cable protection blocks. Background Technology

[0002] As the demand for information transmission in wire harnesses increases, the number of core wires within them is also growing. In current wire harness manufacturing processes, when the number of core wires is high, a large protective rubber block needs to be injection molded inside the connector. Traditional manufacturing processes suffer from two main problems: firstly, the large size of the protective rubber block results in a slow hardening process; secondly, the large surface area of ​​the wire sheath leads to a relatively short injection molding time. This mismatch necessitates a step-by-step injection molding approach, first molding the protective rubber block and allowing it to harden completely before molding the wire sheath. However, with advancements in manufacturing technology, the hardening efficiency of new protective rubber blocks has significantly improved, and their processing time is now close to that of the wire sheath. Continuing with the traditional two-step injection molding process not only fails to fully leverage the technological advantages of the new process but also hinders overall production efficiency. Furthermore, step-by-step injection molding requires multiple positioning and clamping of the wire harness, increasing operational complexity and increasing the risk of cumulative errors due to repeated positioning. Therefore, developing specialized equipment capable of simultaneously injection molding the protective rubber block and the wire sheath has become a key breakthrough for improving wire harness processing efficiency. To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0003] The technical problem to be solved by this utility model is to improve the efficiency of injection molding of protective rubber blocks and reduce the number of production steps in wire harnesses. To solve the above problem, this application proposes an injection molding device for rapid molding of cable protection rubber blocks. This injection molding device has the advantages of realizing the synchronous injection molding of protective rubber blocks and cable sleeves, improving processing efficiency, and reducing repeated positioning errors. The specific technical solution is as follows:

[0004] An injection molding device for rapid prototyping of cable protection blocks includes an annular working flow channel and multiple wire harness fixtures, the wire harness fixtures being transferred on the annular working flow channel; an injection molding area is provided on the annular working flow channel, the injection molding area is provided with a first injection mold, the wire harness fixtures are provided with a second injection mold that cooperates with the first injection mold, and the first injection mold and the second injection mold are assembled to form at least one first cavity for injection molding of protective blocks and at least one second cavity for injection molding of cable sheaths.

[0005] Preferably, the annular working channel includes, in sequence, a manual working channel, a feeding channel, an injection molding zone, and a discharge channel.

[0006] Preferably, the injection molding area is provided with a glue cylinder mechanism for heating and forming injection molding liquid and a molding mechanism, wherein the glue cylinder mechanism is connected to the molding mechanism through a pipeline.

[0007] Preferably, the molding mechanism includes a support bracket for supporting each component and a first injection mold mounted on the support bracket. The first injection mold includes a lower mold filling assembly and an upper mold assembly that cooperate with the second injection mold. A pull rod is formed by a central protrusion on the upper end face of the upper mold assembly. The pull rod expands upward through the upper surface of the support bracket to form an upper mold pressing assembly. The upper mold pressing assembly is fixedly connected to a mold control device. The lower mold filling assembly is close to the second injection mold.

[0008] Preferably, the wire harness fixture includes a carrier plate at the bottom, the upper part of which is divided into a first area for accommodating the wire harness and a second area for accommodating the wire harness connector. The first area is provided with multiple sets of clamping posts for fixing the wire harness, and the second area is provided with multiple clamps for fixing the ends of the wire harness. Near the clamps, there is at least one first injection groove for forming the first cavity and at least one second injection groove for forming the second cavity.

[0009] Preferably, the injection molding zone is connected to a cooling system for rapidly cooling the injection molded part.

[0010] Preferably, a glue-taking mechanism is provided downstream of the injection molding area. The glue-taking mechanism includes a clamping mechanism that moves up and down. The clamping mechanism is fixed on a translation frame that moves in a horizontal plane. The glue-taking mechanism also includes a glue block clamping structure that presses down on the injection molded part.

[0011] Preferably, the adhesive dispensing mechanism is also equipped with a visual inspection device.

[0012] Preferably, it also includes a feeding mechanism, which includes a wire-retrieving clamp that moves up and down, and the wire-retrieving clamp is fixed on a second translation frame that moves in a horizontal plane.

[0013] This invention achieves synchronous injection molding of protective rubber blocks and wire sleeves through the combined design of an annular working flow channel and a double-cavity mold, which has the advantages of improving processing efficiency and reducing repeated positioning errors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0015] Figure 2 This is a schematic diagram of the annular working channel structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the wire harness fixture structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the glue cylinder mechanism of this utility model;

[0018] Figure 5 This is a schematic diagram of the molding mechanism of this utility model;

[0019] Figure 6 This is a schematic diagram of the adhesive dispensing mechanism of this utility model;

[0020] Figure 7 This is a schematic diagram of the material feeding mechanism of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-2 As shown, this utility model discloses an injection molding device for rapid prototyping of cable protection blocks. To meet the needs of assembly line operations and reduce process intervals, this utility model constructs a circulating flow path. Specifically, the injection molding device includes an annular working channel 1 and multiple wire harness fixtures 2, which are transferred on the annular working channel 1. An injection molding area 3 is provided on the annular working channel 1, and a first injection mold 31 is provided on the injection molding area 3. The wire harness fixtures 2 are provided with a second injection mold that cooperates with the first injection mold 31. After the first injection mold 31 and the second injection mold are combined, at least one first cavity for injection molding of protective blocks and at least one second cavity for injection molding of cable sleeves are formed.

[0023] The annular operation channel 1 refers to a closed-loop material transfer track, which can be implemented using a roller conveyor belt or a chain drive mechanism, used to carry the wire harness fixture 2 to complete continuous cyclic movement. In this embodiment, the annular operation channel 1 includes a manual operation channel 5, a feeding channel 6, an injection molding area 3, and a discharge channel 7 in sequence. The cyclic movement of the wire harness fixture 2 is achieved on the annular operation channel 1 through manual operation, rollers, push rods, and other mechanisms. Specifically, the manual operation channel 5 refers to the section used for manual operation of wire harness pre-assembly and fixture retrieval. It can be implemented using a conveyor platform with roller belts 51 in conjunction with manual operation. Roller belts 51 are distributed on both sides of the conveyor platform. The size of the wire harness fixture 2 is matched with the width of the conveyor platform, and the base of the wire harness fixture 2 rests precisely on the roller belts 51. When the operator pushes the wire harness fixture 2, due to the low friction of the roller belts 51 and the large mass of the wire harness fixture 2, it slides into the feeding channel 6 under the action of inertia. The feed channel 6 is a transition channel that pushes the wire harness fixture 2 into the injection molding zone 3. A servo motor, in conjunction with a photoelectric sensor, detects whether the injection molding zone 3 is empty. If it is empty, the servo motor pushes the wire harness fixture 2 to the designated position. This process is well-known in the industry and will not be elaborated upon here. The injection molding zone 3 injects material into the wire harness fixture 2 and forms the plastic block. The unloading channel 7 removes excess residual material and detaches the completed wire harness from the wire harness fixture 2, placing it into the product frame. During the injection molding and residual material removal processes, the machine's robotic arm simultaneously injects and removes material while advancing the wire harness fixture 2. The unloading channel 7 also simultaneously returns the wire harness fixture 2 to the manual operation channel 5. The unloading channel 7 uses a periodically oscillating push rod 71 to push the empty fixture push rod back to the manual operation channel 5.

[0024] like Figure 3 As shown, the wire harness fixture 2 refers to the tooling fixture that carries the wire harness assembly. Specifically, it can be implemented using an aluminum alloy frame 21 in conjunction with clamping posts 22. In this embodiment, its surface is provided with a clamping device composed of clamping posts to fix the position of the wire harness. At the same time, the aluminum alloy frame 21 is also provided with clamps 23 for fixing the wire harness connector. The wire harness fixture 2 includes a carrier plate at the bottom. The upper part of the carrier plate is divided into a first area 24 for accommodating the wire harness and a second area 25 for accommodating the wire harness connector. The first area 24 is provided with multiple sets of clamping posts 22 for fixing the wire harness. The surface of the clamping posts 22 is provided with an anti-slip layer. The second area 24 is provided with multiple clamps 23 for fixing the ends of the wire harness. Near the clamps 23, there is at least one first injection groove 26 for forming a first cavity and at least one second injection groove 27 for forming a second cavity. In the manual operation area, the operator can first fix one end of the wire harness with the clamp 23, then wrap the wire harness around the clamping column 22, and then fix the other end on the clamp 23, and then push it into the feed channel 6.

[0025] Injection molding zone 3 is equipped with a glue cylinder mechanism 30 for heating and forming injection molding liquid and a molding mechanism 32, such as Figure 4 As shown, the glue cylinder mechanism 30 refers to the device for heating and melting the injection molding raw material, including a feed screw motor 301 and a heating glue cylinder 302. The glue cylinder mechanism 30 can be implemented using electric heating or heat transfer oil circulation heating, used to convert solid raw materials into a fluid liquid glue. The molding mechanism 32 refers to the component that receives the liquid glue and completes injection molding. It can be implemented using a structure with a mold and pressure control system, used to fill the glue into the mold cavity to form a protective glue block and a thread sheath. The glue cylinder mechanism 30 is connected to the molding mechanism 32 via a pipe 33. The pipe 33 can be a stainless steel pipe with an insulation layer or a high-temperature resistant flexible hose, used to maintain the temperature and fluidity of the glue during the transportation process.

[0026] like Figure 5 As shown, the molding mechanism 32 includes a support bracket 34 for supporting various components and a first injection mold 31 mounted on the support bracket 34. The first injection mold 31 includes a lower mold filling assembly 311 and an upper mold assembly 312 that cooperate with the second injection mold. The support bracket 34 is a support structure that carries the mold components, and can be implemented using a metal frame structure. Its function is to provide rigid support for the lower mold filling assembly 311 and the upper mold assembly 312, ensuring the mold alignment accuracy during injection molding. The lower mold filling assembly 311 is a fixed mold body that cooperates with the second injection mold. It can be implemented using a modular structure with a filling channel. Its function is to shorten the flow path of the glue and reduce injection pressure loss by arranging it in close proximity to the second injection mold. The upper mold assembly 312 is a movable mold closing component. A pull rod 313 is formed by a central protrusion on the upper surface of the upper mold assembly 312. The pull rod 313 passes upward through the upper surface of the mechanism support 34 and expands to form the upper mold lower pressing assembly 314. The upper mold assembly 312 and the upper mold lower pressing assembly 314 are linked through the pull rod 313. The upper mold lower pressing assembly 314 is fixedly connected to the mold control device. Under the drive of the mold control device, the upper mold assembly 312 achieves vertical opening and closing movements. The mold control device is the actuator that drives the mold movement; specifically, it can be implemented using a hydraulic cylinder or a linear module driven by a servo motor. Its function is to ensure the sealing of the first cavity and the second cavity during mold closing by precisely controlling the stroke of the upper mold lower pressing assembly 314. The lower mold potting assembly 311 is close to the second injection mold. When the wire harness fixture 2 enters the injection molding area 3, the second injection mold and the lower mold potting assembly 311 form the lower half of the first cavity and the second cavity. The mold control device drives the upper mold pressing assembly 314 to move the pull rod 313 downward, causing the upper mold assembly 312 and the lower mold potting assembly 311 to close, completing the cavity sealing. Adhesive fills both the first and second cavities simultaneously through the injection channel of the lower mold potting assembly 311, achieving synchronous molding of the protective adhesive block and the wire sheath. During mold closing, the rigid connection of the pull rod 313 prevents the upper mold assembly 312 from shifting, ensuring the fitting accuracy of the upper and lower molds.

[0027] Furthermore, the injection molding area is connected to a cooling system for rapid cooling of the injection molded parts. The cooling system can be implemented using a combination of circulating water cooling pipes and semiconductor cooling chips. The circulating water cooling pipes are arranged around the mold cavity, or the semiconductor cooling chips are embedded inside the mold base. The solidification of the injection molded parts is accelerated through active heat exchange. In practice, forced convection cooling can be started immediately after injection molding, and then switched to contact conduction cooling.

[0028] Downstream of injection molding zone 3 is a glue-collecting mechanism 8, such as... Figure 6 As shown, the glue-receiving mechanism 8 includes a vertically movable clamping mechanism 81, which is fixed on a horizontally movable translation frame 82. The clamping mechanism 81 can be implemented using pneumatic or electric grippers. The surface of the grippers can be provided with anti-slip textures to increase friction. The clamping mechanism 81 completes the gripping and releasing action of residual glue through vertical lifting and lowering movement, cutting off and removing excess residual glue generated during the injection molding process or residual glue connecting different glue blocks and placing it into the recycling box 83 to realize the recycling of glue material. The glue-receiving mechanism 8 also includes a glue block clamping structure 84 that presses down on the injection molded part. When removing residual glue, the glue block clamping structure 84 moves down synchronously and applies pressure to the injection molded part, so that the injection molded part maintains a stable posture when it leaves the mold. The glue block clamping structure 84 can also effectively prevent the injection molded part from shifting due to inertia or vibration.

[0029] Furthermore, the glue-taking mechanism 8 is also equipped with a vision inspection device 85. The vision inspection device 85 is a device for positioning and quality inspection of injection molded parts through optical imaging and image processing technology. Specifically, it can be implemented by using an industrial camera in conjunction with a light source component and image processing algorithm. Its function is to identify the position coordinates of the injection molded parts in real time and detect surface defects. The vision inspection mechanism can be a simple magnifying glass, allowing workers to directly view the internal glue block injection situation through the magnifying glass, or it can be an electron microscope, which realizes automatic inspection of injection molded parts through digital image shooting and transmission, combined with artificial intelligence image detection technology.

[0030] It also includes the following: 9. Figure 7 As shown, the unloading mechanism 9 includes a vertically movable wire-retrieving clamp 91, which is fixed on a second translation frame 92 that moves in a horizontal plane. The unloading mechanism 9 transfers the injection-molded wire harness assembly from the processing area to a designated position. This can be achieved by using a combination of a multi-axis robotic arm and a pneumatic wire-retrieving clamp 91. The design of the robotic arm is well-known in the industry and will not be described in detail here. The robotic arm grasps and transfers the injection-molded wire harness by guiding the vertical and horizontal movements of the wire-retrieving clamp 91, placing it into the product frame 93, and then resetting to await the arrival of the next injection-molded wire harness.

[0031] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any changes or modifications made in accordance with the claims and description of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. An injection molding device for rapid prototyping of cable protection blocks, characterized in that: The device includes an annular working flow channel and multiple wire harness fixtures, which are passed along the annular working flow channel. The annular working flow channel is provided with an injection molding area, which is provided with a first injection mold. The wire harness fixture is provided with a second injection mold that cooperates with the first injection mold. The first injection mold and the second injection mold are assembled to form at least one first cavity for injection molding a protective rubber block and at least one second cavity for injection molding a wire sheath.

2. The injection molding device for rapid prototyping of cable protection blocks according to claim 1, characterized in that: The annular operating channel includes, in sequence, a manual operating channel, a feeding channel, an injection molding zone, and a discharge channel.

3. The injection molding device for rapid prototyping of cable protection blocks according to claim 1, characterized in that: The injection molding area is equipped with a glue cylinder mechanism for heating and forming injection molding liquid and a molding mechanism. The glue cylinder mechanism is connected to the molding mechanism through pipelines.

4. The injection molding device for rapid prototyping of cable protection blocks according to claim 3, characterized in that: The molding mechanism includes a support bracket for supporting each component and a first injection mold mounted on the support bracket. The first injection mold includes a lower mold filling assembly and an upper mold assembly that cooperate with the second injection mold. A pull rod is formed by a central protrusion on the upper end face of the upper mold assembly. The pull rod expands upward through the upper surface of the support bracket to form an upper mold pressing assembly. The upper mold pressing assembly is fixedly connected to a mold control device. The lower mold filling assembly is close to the second injection mold.

5. The injection molding device for rapid prototyping of cable protection blocks according to claim 1, characterized in that: The wire harness fixture includes a carrier plate at the bottom. The upper part of the carrier plate is divided into a first area for accommodating the wire harness and a second area for accommodating the wire harness connector. The first area is provided with multiple sets of clamping posts for fixing the wire harness. The second area is provided with multiple clamps for fixing the ends of the wire harness. Near the clamps are at least one first injection groove for forming the first cavity and at least one second injection groove for forming the second cavity.

6. The injection molding device for rapid prototyping of cable protection blocks according to claim 1, characterized in that: The injection molding zone is connected to a cooling system for rapidly cooling the injection molded parts.

7. The injection molding device for rapid prototyping of cable protection blocks according to claim 1, characterized in that: Downstream of the injection molding area is a glue-collecting mechanism, which includes a clamping mechanism that moves up and down and is fixed on a translation frame that moves in a horizontal plane. The glue-collecting mechanism also includes a glue block pressing structure that presses down on the injection molded part.

8. The injection molding device for rapid prototyping of cable protection blocks according to claim 7, characterized in that: The adhesive dispensing mechanism is also equipped with a visual inspection device.

9. The injection molding device for rapid prototyping of cable protection blocks according to claim 1, characterized in that: It also includes a feeding mechanism, which includes a wire-taking clamp that moves up and down and is fixed on a second translation frame that moves in a horizontal plane.

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