Injection mold system for improving the forming precision of a vehicle lamp housing

Abstract

The utility model discloses an injection mold system of improving car lamp shell forming precision relates to injection mold technical field, and the utility model discloses a shell body is equipped with the forming mechanism in the middle part of shell body for the injection molding of car lamp shell, and the forming mechanism includes: multi -position subassembly includes the machine tool of fixed mounting in the top one side of shell body, and the present application can drive the uniform rotation of driving disc through drive motor, when the drive block on driving disc inserts the drive groove of intermittent disc, drives intermittent disc and rotating disc to rotate together, after drive block is taken off, the arc limiting block on driving disc is quickly inserted the limiting slot of intermittent disc outside, and rotating disc is locked in target position, and it is guaranteed that the rotation angle is accurate for 90 every time, so that four lower moulds can pass injection, cooling, taking spare parts, cleaning four stations in proper order, realizes continuous circulation operation to reduce the forming piece unloading and mold cleaning time, and the overall production efficiency of car lamp shell is improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold system for improving the molding accuracy of automotive headlight housings. Background Technology

[0002] As an important automotive component, the headlight housing has extremely high requirements for appearance quality, dimensional accuracy, and structural consistency, and is usually produced using injection molding.

[0003] Referring to the patent document: Patent Publication No. CN116423766B, Patent Publication Date 2023-10-24, a molding die for automotive headlight housing with improved molding accuracy is disclosed, relating to the field of injection molding equipment technology. It includes an upper mold platform and a lower mold platform. A molding block is fixedly connected to the bottom of the upper mold platform, and a molding groove is formed on the top of the lower mold platform. A mold closing mechanism is provided along the edge of the lower mold platform. A pushing mechanism for assisting in pushing the upper mold platform is provided on one side of the lower mold platform. The pushing mechanism includes a pushing unit and a shifting unit for driving the pushing unit to move horizontally. This invention, by setting up a pushing mechanism, uses multiple pressure sensors arranged in a dispersed manner to detect the compression state at different positions of the mold, thereby detecting the distribution of injection molding material within the mold. Through the cooperation of the detection unit and the pushing unit, the pushing pressure at different positions is adjusted, thereby ensuring the uniform distribution of injection molding material within the mold, enabling the device to achieve higher injection molding accuracy.

[0004] Based on the search of patent numbers and the shortcomings of existing technologies, the following was found: Although the aforementioned patent can detect and adjust the pressure between molds by setting up detection and pushing units, adjusting the pressure difference generated at different positions by moving and adjusting the position of a single cylinder can easily lead to the cavity pressure value never being in a balanced state, which can easily affect product quality. At the same time, the upper and lower molds open and close vertically, which makes it more cumbersome to remove the molded parts and the single-station operation efficiency is low.

[0005] Therefore, this utility model provides an injection mold system for improving the molding precision of vehicle headlight housings. Utility Model Content

[0006] To address the issues of insufficient pressure balance and low part removal efficiency when using single-point pressure adjustment and upper / lower mold opening methods, the purpose of this invention is to provide an injection mold system that improves the molding precision of automotive headlight housings.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an injection mold system for improving the molding precision of vehicle headlight housings, comprising a housing body, wherein a molding mechanism is provided in the middle of the housing body for injection molding the vehicle headlight housing, the molding mechanism comprising: The multi-station assembly includes a machine tool fixedly installed on one side of the top of the outer casing. A rotary disk is rotatably installed on the upper part of the machine tool, and an intermittent disk is rotatably installed at the bottom of the rotary disk. Several drive slots are opened in the middle of the intermittent disk. A drive disk is provided on one side of the lower part of the intermittent disk. A drive block that cooperates with the drive slots is fixedly installed on one side of the top of the drive disk. A drive assembly is provided at the bottom of the drive block. Several lower molds are fixedly installed on the top of the rotary disk. The pressing assembly is located in the middle of one side of the outer shell and is used to cooperate with the lower mold to achieve injection molding.

[0008] Preferably, the pressing assembly includes a frame fixedly installed in the middle of the outer shell, a fixing frame fixedly installed on the upper part of the frame, four evenly distributed cylinders fixedly installed on the top of the fixing frame, an upper mold provided on the lower part of the frame, and a pressure plate that contacts the upper mold fixedly installed at the bottom of each of the four cylinders.

[0009] Preferably, the drive assembly includes a drive motor fixedly installed in the middle of the machine tool, and the bottom center of the drive disk is fixedly installed on the drive end of the drive motor.

[0010] Preferably, a limiting block is fixedly installed at the top center of the drive disk, and multiple limiting grooves that cooperate with the limiting block are opened on the outer side of the intermittent disk.

[0011] Preferably, a baffle is fixedly installed at the top of the rotating disk, and the baffle has a cross-shaped structure.

[0012] Preferably, an injection tube is fixedly installed at the top center of the upper mold, and the injection tube is connected to the output end of the extrusion equipment of the injection molding device.

[0013] Beneficial effects This invention provides an injection mold system for improving the molding precision of automotive headlight housings. Compared with existing technologies, it has the following advantages: 1. This application can drive the drive disk to rotate at a constant speed by a drive motor. When the drive block on the drive disk is embedded in the drive groove of the intermittent disk, it drives the intermittent disk and the rotating disk to rotate together. After the drive block is dislodged, the arc-shaped limit block on the drive disk quickly engages with the limit groove on the outside of the intermittent disk, locking the rotating disk in the target position and ensuring that the rotation angle is accurate to 90° each time. This allows the four lower molds to pass through the four stations of injection molding, cooling, part removal, and cleaning in sequence, realizing continuous cycle operation. This reduces the unloading time of the molded parts and the time for mold cleaning, and significantly improves the overall production efficiency of the car headlight housing.

[0014] 2. This application can control the pressure between molds by setting multiple independently controlled cylinders to control the pressure plate, so that it can synchronously adjust the control of multiple points and multiple areas, avoiding uneven force on the cavity caused by a single cylinder controlling the pressure between molds. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the pressing component structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the multi-station component structure of this utility model.

[0019] In the diagram: 1. Outer shell; 11. Machine tool; 2. Molding mechanism; 21. Multi-station assembly; 211. Rotary disk; 212. Lower mold; 213. Intermittent disk; 214. Drive disk; 215. Drive block; 2151. Drive groove; 216. Limit block; 2161. Limit groove; 217. Drive motor; 218. Baffle; 22. Pressing assembly; 221. Frame; 222. Fixing frame; 223. Cylinder; 224. Pressure plate; 225. Upper mold; 226. Injection tube. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: an injection mold system for improving the molding accuracy of vehicle headlight housings, including a housing body 1, with a molding mechanism 2 located in the middle of the housing body 1 for injection molding the vehicle headlight housing. The molding mechanism 2 includes: The multi-station assembly 21 includes a machine tool 11 fixedly installed on one side of the top of the outer casing 1. A rotating disk 211 is rotatably installed on the upper part of the machine tool 11. An intermittent disk 213 is rotatably installed at the bottom of the rotating disk 211. A number of drive slots 2151 are opened in the middle of the intermittent disk 213. The number of drive slots 2151 is the same as the number of lower molds 212 installed. A drive disk 214 is provided on one side of the lower part of the intermittent disk 213. A drive block 215 that cooperates with the drive slots 2151 is fixedly installed on one side of the top of the drive disk 214. A drive component is provided at the bottom of the drive block 215. A number of lower molds 212 are fixedly installed on the top of the rotating disk 211. There are 4 lower molds 212. When the drive disk 214 rotates, the drive block 215 can be inserted into the drive slots 2151 to drive the intermittent disk 213 to rotate intermittently. That is, when the drive disk 214 rotates one revolution, the rotating disk 211 rotates one-quarter revolution. The pressing component 22 is located in the middle of one side of the outer shell 1 and is used to cooperate with the lower mold 212 to achieve injection molding.

[0022] The pressing assembly 22 includes a frame 221 fixedly installed in the middle of the outer casing 1. The frame 221 is welded from Q235B steel and has drive tooth grooves on its columns so that it can drive the upper mold 225 to move up and down, realizing the opening and closing with the lower mold 212. A fixing frame 222 is fixedly installed on the upper part of the frame 221. Four evenly distributed cylinders 223 are fixedly installed on the top of the fixing frame 222. The cylinders 223 are SC125×200 standard cylinders. At the same time, multiple pressure detection units are set at the contact position between the upper mold 225 and the lower mold 212 to detect the pressure changes during injection and control the action of the cylinders 223, thereby adjusting each area so that the pressure of the upper mold 225 and the lower mold 212 is more uniform when closing the injection. The upper mold 225 is set at the lower part of the frame 221, and pressure plates 224 that contact the upper mold 225 are fixedly installed at the bottom of the four cylinders 223.

[0023] The drive assembly includes a drive motor 217 fixedly installed in the middle of the machine tool 11, and a drive disk 214 fixedly installed at the bottom center of the drive motor 217. The drive motor 217 is a Y132M-4 type three-phase asynchronous motor. Starting the drive motor 217 drives the drive disk 214 to rotate, causing the rotating disk 211 to rotate intermittently, thereby allowing the lower mold 212 to switch positions flexibly and facilitating the removal of the molded parts.

[0024] A limiting block 216 is fixedly installed at the top center of the drive disk 214. Multiple limiting grooves 2161 are provided on the outer side of the intermittent disk 213 to cooperate with the limiting block 216. The limiting block 216 has an arc-shaped structure, which can quickly be inserted into the limiting groove 2161 after the drive block 215 is disengaged from the drive groove 2151, thereby limiting the rotation of the intermittent disk 213.

[0025] A baffle 218 is fixedly installed on the top of the rotating disk 211. The baffle 218 has a cross-shaped structure, and its four extended ends correspond to the gap positions of adjacent lower molds 212. It can effectively block the molten material that may splash during the injection molding process, and at the same time, it can separate the work stations, making it convenient for operators to carry out loading and unloading operations.

[0026] An injection tube 226 is fixedly installed at the top center of the upper mold 225. The injection tube 226 is connected to the output end of the extrusion equipment of the injection molding device and is used to transport molten material into the molding cavity of the mold.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] During operation, when the lower mold 212, carrying the cleaned mold cavity, rotates to the injection station, the upper pressing assembly 22 is activated. The drive device on the frame 221 drives the upper mold 225 to move downwards via the drive tooth groove until it closes with the lower mold 212 below, forming a sealed cavity. During the mold closing process and the initial stage of injection pressure holding, multiple pressure detection units (pressure sensor arrays) embedded in the contact surface between the upper mold 225 and the lower mold 212 begin to work, monitoring the pressure distribution of multiple key areas on the entire mold closing surface in real time. If the control system detects that the pressure in a certain area is lower than the preset value (indicating that there may be a gap or deformation risk at that location), it immediately instructs the corresponding cylinder above that area. 223 is activated. The cylinder 223 pushes the pressure plate 224 below it to apply an additional downward fine-tuning pressure to a local area of ​​the upper mold 225. This can locally correct the pressure imbalance on the mold closing surface caused by minor mold deformation or uneven thermal expansion. The four cylinders 223 can operate independently to achieve zoned, closed-loop, and dynamic balance of the pressure on the mold closing surface, ensuring that the cavity is subjected to uniform force during melt filling and pressure holding. After the pressure is adjusted to a balanced state, the molten plastic from the external injection molding machine is injected into the cavity through the injection tube 226. During injection and pressure holding, the pressure fine-tuning system works continuously to counteract the dynamic pressure impact brought by the plastic injection. After the pressure holding is completed, the station enters the cooling stage. Simultaneously, drive motor 217 starts to prepare for the workstation changeover. After the product cools and sets, the drive device of frame 221 drives the upper mold 225 to move upwards via the toothed groove, completing the mold opening. At this time, drive motor 217 drives drive disk 214 to rotate at a constant speed. When drive block 215 on drive disk 214 is inserted into drive groove 2151 of intermittent disk 213, it will drive intermittent disk 213 and rotating disk 211 to rotate precisely 90 degrees. After drive block 215 is disengaged, arc-shaped limiting block 216 on drive disk 214 quickly engages in limiting groove 2161 on the outside of intermittent disk 213, locking rotating disk 211 in a new position, ensuring the precise positioning of the four workstations. Once a rotation is completed, all four stations simultaneously proceed to the next process. The mold that has completed injection molding is transferred to the cooling station, the mold that has been cooled is transferred to the mold opening and part removal station, the empty mold with the product removed is transferred to the cleaning station, and the cleaned mold is transferred to the injection molding station to start a new cycle.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold system for improving the molding precision of automotive headlight housings, comprising a housing body (1), characterized in that: The outer shell (1) is provided with a molding mechanism (2) in the middle for injection molding the headlight shell. The molding mechanism (2) includes: The multi-station assembly (21) includes a machine tool (11) fixedly installed on one side of the top of the outer shell (1). A rotating disk (211) is rotatably installed on the upper part of the machine tool (11). An intermittent disk (213) is rotatably installed on the bottom of the rotating disk (211). Several drive slots (2151) are opened in the middle of the intermittent disk (213). A drive disk (214) is provided on one side of the lower part of the intermittent disk (213). A drive block (215) that cooperates with the drive slots (2151) is fixedly installed on one side of the top of the drive disk (214). A drive assembly is provided at the bottom of the drive block (215). Several lower molds (212) are fixedly installed on the top of the rotating disk (211). The pressing assembly (22) is located in the middle of one side of the outer shell (1) and is used to cooperate with the lower mold (212) to achieve injection molding.

2. The injection mold system for improving the molding accuracy of automotive headlight housings according to claim 1, characterized in that: The pressing assembly (22) includes a frame (221) fixedly installed in the middle of the outer shell (1), a fixing frame (222) fixedly installed on the upper part of the frame (221), four evenly distributed cylinders (223) fixedly installed on the top of the fixing frame (222), an upper mold (225) provided on the lower part of the frame (221), and a pressure plate (224) that contacts the upper mold (225) fixedly installed at the bottom of each of the four cylinders (223).

3. The injection mold system for improving the molding accuracy of automotive headlight housings according to claim 1, characterized in that: The drive assembly includes a drive motor (217) fixedly installed in the middle of the machine tool (11), and the bottom center of the drive disk (214) is fixedly installed at the drive end of the drive motor (217).

4. The injection mold system for improving the molding accuracy of automotive headlight housings according to claim 1, characterized in that: A limiting block (216) is fixedly installed at the top center of the drive disk (214), and multiple limiting grooves (2161) are opened on the outer side of the intermittent disk (213) to cooperate with the limiting block (216).

5. The injection mold system for improving the molding accuracy of automotive headlight housings according to claim 1, characterized in that: A baffle (218) is fixedly installed at the top of the rotating disk (211), and the baffle (218) has a cross-shaped structure.

6. The injection mold system for improving the molding accuracy of automotive headlight housings according to claim 2, characterized in that: An injection tube (226) is fixedly installed at the top center of the upper mold (225), and the injection tube (226) is connected to the output end of the extrusion equipment of the injection molding device.

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