A multi-color injection mold system

Abstract

The utility model discloses a multicolor injection mold system, characterized by including movable template, the movable die part and core of mould, characterized by the movable die part of mould is by a main drive mechanism drive, and rotatably set up on movable template, and core can be separatedly installed on movable die part, still include: a top off mechanism for the core ejection makes it with movable die part separate, a core rotation drive mechanism for after core automatic die part separates alone drive core rotation, a detachable connecting portion for realizing the transmission connection and separation of the output end of core rotation drive mechanism and core. Advantage is to integrate the two working modes of "turning mould" and "turning core" that can be realized by two different injection molding machines independently in a set of mould system traditionally, realizes the production of two modes on a device, and the device using the mould system can switch two working modes according to the specific demand of product, and the adaptability of production is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a multi-color injection mold system. Background Technology

[0002] Traditional injection molds typically only produce products of one color. However, with consumers' increasing demands for diverse product appearances, manufacturing multi-color products using traditional molds requires multiple injection molding processes, leading to high mold costs and low production efficiency. Therefore, multi-color injection molds have emerged. Multi-color injection molding technology can produce complex plastic products composed of multiple materials or colors, and has thus gained widespread application.

[0003] Currently, mainstream multi-color injection molding technologies mainly rely on two independent modes: the first is the mold rotation mode, which drives the entire mold to rotate through a corresponding drive mechanism and is suitable for manufacturing large products; the second is the core rotation mode, which sets an independent rotating mechanism inside the mold to drive only a specific core component (the core set on the moving template) to rotate, suitable for manufacturing small products, and has the advantages of fast cycle time and high precision. Currently, these two technologies are independent of each other and are equipped on two different types and configurations of injection molding machines, resulting in high equipment investment costs, large footprint, poor production flexibility, and poor versatility. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a multi-color injection mold system that has a simple structure, can integrate the advantages of the above two modes, and can be flexibly switched according to product needs.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A multi-color injection molding system includes a moving template, a moving mold portion, and a core. The moving mold part of the mold is driven by a main drive mechanism and is rotatably mounted on the moving template. The core is detachably mounted on the moving mold portion; Also includes: A ejection mechanism is used to eject the core to separate it from the moving mold portion; A core rotation drive mechanism is used to drive the core to rotate independently after the core is separated from the moving mold part; A detachable connection part is used to realize the transmission connection and separation between the output end of the core rotation drive mechanism and the core; The above structure enables injection molding machines equipped with this mold system to have the following two operating modes: First working mode: The core is installed on the moving mold part, and the moving mold part is driven by the main drive mechanism to drive the core to rotate synchronously. In this working state, the detachable connection part is not connected and installed. Second working mode: The core is connected to the output end of the core rotation drive mechanism through a detachable connection part. When the ejector mechanism is activated, the core is ejected from the moving mold part, and the core rotation drive mechanism independently drives the core to rotate.

[0006] The main drive mechanism includes a turntable driven by a main servo motor, and the turntable is rotatably mounted on the moving template.

[0007] The turntable is a turntable with an external gear ring. The rotation output end of the main servo motor is coaxially fixed with a matching drive gear, which meshes with the external gear ring of the turntable.

[0008] The core rotation drive mechanism includes a servo drive motor and a rotating shaft. The detachable connection part is a connecting shaft. The rear end of the rotating shaft is driven to rotate by the servo drive motor. The front end of the rotating shaft is coaxially fixed to the rear end of the connecting shaft in a detachable manner. The front end of the connecting shaft passes through the moving mold part and is detachably fixedly connected to the core.

[0009] The moving template is provided with a rotating shaft positioning sleeve. The front end of the rotating shaft is rotatably positioned and installed in the rotating shaft positioning sleeve. The rear end of the connecting shaft extends into the rotating shaft positioning sleeve and is coaxially and detachably fixedly connected to the front end of the rotating shaft. The rear end of the connecting shaft is rotatably disposed in the rotating shaft positioning sleeve.

[0010] The rotating shaft is movably disposed back and forth in the rotating shaft positioning sleeve along its axial direction. The jacking mechanism includes a jacking drive seat, which is disposed at the rear end of the rotating shaft. The jacking drive seat is driven by a jacking cylinder to drive the rotating shaft to move back and forth along its axial direction.

[0011] The output end of the servo drive motor is provided with a first pulley, and the rear end of the rotating shaft is fixedly connected to a second pulley. The first pulley and the second pulley are connected by a belt drive.

[0012] The rotating shaft positioning sleeve penetrates the moving template, with its front end placed inside the moving template and its rear end extending out and positioned outside the moving template. The front end of the rotating shaft positioning sleeve and the moving template form an internal water passage. A water-passing shaft is sleeved and connected to the rear end of the rotating shaft positioning sleeve. The water-passing shaft and the rotating shaft positioning sleeve form an external water passage. The internal water passage and the external water passage are mutually sealed and connected.

[0013] The moving mold part is provided with a positioning post, and the core is provided with a corresponding positioning hole. The positioning post is inserted into the corresponding positioning hole to realize the positioning and installation of the core on the moving mold part.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: it integrates the two working modes of "mold rotation" and "core rotation," which are traditionally independent and require two different injection molding machines, into a single mold system, enabling the production of both modes on a single machine; the injection molding machine using this mold system can flexibly switch between the two working modes according to the specific needs of the product, adapting to a wider range of multi-color product production needs, greatly enhancing production adaptability and market responsiveness; users do not need to purchase two injection molding machines of different types and configurations for the two technologies, reducing equipment investment costs and minimizing floor space required. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention in the first working mode; Figure 2 This is a cross-sectional structural diagram of the present invention in the first working mode; Figure 3 This is a three-dimensional structural diagram of the present invention in the second working mode; Figure 4 This is a cross-sectional structural diagram of the present invention in the second working mode. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] As shown in the figure, a multi-color injection mold system includes a moving template 1, a moving mold part 2, and a core 3; The moving mold part 2 of the mold is driven by a main drive mechanism and is rotatably mounted on the moving template 1; The core 3 is detachably mounted on the moving mold part 2; Also includes: An ejection mechanism is used to eject the core 3 to separate it from the moving mold part 2; A core rotation drive mechanism is used to drive the core 3 to rotate independently after the core 3 is separated from the automatic mold part 2; A detachable connecting part 4 is used to realize the transmission connection and separation between the output end of the core rotation drive mechanism and the core 3; The above structure enables injection molding machines equipped with this mold system to have the following two operating modes: First working mode: The core 3 is installed on the moving mold part 2. The main drive mechanism drives the moving mold part 2 and drives the core 3 to rotate synchronously. In this working state, the detachable connection part 4 is not connected and installed. Second working mode: The core 3 and the output end of the core rotation drive mechanism are connected separately through the detachable connection part 4. When the push-off mechanism is activated, the core 3 is pushed away from the moving mold part 2, and the core 3 is independently driven to rotate by the core rotation drive mechanism.

[0018] In this specific embodiment, the main drive mechanism includes a turntable 6 driven to rotate by a main servo motor 5, and the turntable 6 is rotatably mounted on the moving mold plate 1. The above scheme realizes the overall drive of the moving mold part 2. By controlling the rotation of the turntable 6 through the main servo motor 5, it has the advantages of high control precision, smooth movement, and fast response speed, and can provide a reliable and precise power source for the "first working mode (mold rotation)".

[0019] In this specific embodiment, the turntable 6 is a turntable 6 with an external gear ring. A matching drive gear 51 is coaxially fixedly installed at the rotation output end of the main servo motor 5, and the drive gear 51 meshes with the external gear ring of the turntable 6. The gear ring transmission method has the advantages of large transmission torque, smooth and reliable operation, and good structural rigidity, which can ensure the accurate positioning and synchronization of the rotation of the moving mold part 2 under heavy load, and avoid the problems of slippage or inaccurate positioning.

[0020] In this specific embodiment, the core rotation drive mechanism includes a servo drive motor 7 and a rotating shaft 8. The detachable connecting part 4 is a connecting shaft. The rear end of the rotating shaft 8 is driven to rotate by the servo drive motor 7. The front end of the rotating shaft 8 is coaxially fixed to the rear end of the connecting shaft in a detachable manner. The front end of the connecting shaft passes through the moving mold part 2 and is detachably fixedly connected to the core 3. By using the connecting shaft as the detachable connecting part 4, the convenience and reliability of connecting and separating the core rotation drive mechanism and the core 3 are achieved, ensuring the concentricity of power transmission and constituting the key to flexible switching between the two modes.

[0021] In this specific embodiment, a rotating shaft positioning sleeve 11 is provided on the moving template 1. The front end of the rotating shaft 8 is rotatably positioned and installed in the rotating shaft positioning sleeve 11. The rear end of the connecting shaft extends into the rotating shaft positioning sleeve 11 and is coaxially and detachably fixedly connected to the front end of the rotating shaft 8. The rear end of the connecting shaft is rotatably disposed in the rotating shaft positioning sleeve 11. The rotating shaft positioning sleeve 11 plays a supporting and positioning role. It can ensure the concentricity and stability of the rotating shaft 8 and the connecting shaft during rotation, reduce eccentricity and vibration, and provide a reliable installation and movement reference for the connecting shaft, thus ensuring the rigidity and accuracy of the entire transmission system.

[0022] In this specific embodiment, the rotating shaft 8 is movably disposed within the rotating shaft positioning sleeve 11 along its axial direction. The ejection mechanism includes an ejection drive seat 9, which is disposed at the rear end of the rotating shaft 8. The ejection drive seat 9 is driven by an ejection cylinder 91 to drive the rotating shaft 8 to move back and forth along its axial direction. This design combines the ejection function with the driving function of the rotating shaft 8. By driving the rotating shaft 8 axially through the ejection cylinder 91, the separation and closing of the core 3 and the moving mold part 2 can be achieved, resulting in a compact overall structure, direct and efficient action, simplified internal mold structure, and precise control of the ejection action.

[0023] In this specific embodiment, the output end of the servo drive motor 7 is provided with a first pulley 71, and the rear end of the rotating shaft 8 is fixedly connected to a second pulley 81. The first pulley 71 and the second pulley 81 are connected by a belt 78. This design allows for flexible layout of the drive motor, does not require the motor and the rotating shaft 8 to be strictly coaxial, provides greater flexibility and space utilization for the overall structure design of the mold, and facilitates the combination of ejection and rotation functions.

[0024] In this specific embodiment, the rotating shaft positioning sleeve 11 penetrates the moving template 1, with its front end placed inside the moving template 1 and its rear end extending outwards from the moving template 1. An internal water flow channel (not shown in the figure) is formed between the front end of the rotating shaft positioning sleeve 11 and the moving template 1. A water-passing shaft 111 is sleeved and connected to the rear end of the rotating shaft positioning sleeve 11, forming an external water flow channel (not shown in the figure) between the water-passing shaft 111 and the rotating shaft positioning sleeve 11. The internal and external water flow channels are sealed and connected to each other. Since the core 3 can rotate independently, using conventional external water channels for cooling is obviously not feasible. Therefore, by using the ingenious fixing components "rotating shaft positioning sleeve 11" and "water-passing shaft 111," combined with a rotary seal, a stable "port" can be built inside the mold, successfully connecting the externally fixed cooling water channel with the internal high-speed rotating core 3 cooling water channel, perfectly solving the fluid transport problem between moving and stationary components.

[0025] In this specific embodiment, a positioning post 21 is provided on the moving mold part 2, and a corresponding positioning hole 31 is provided on the core 3. The positioning post 21 passes through the corresponding positioning hole 31 to achieve the positioning and installation of the core 3 on the moving mold part 2. The cooperation between the positioning post 21 and the positioning hole 31 ensures that the core 3 can be accurately guided to the preset position when installed on the moving mold part 2, effectively preventing the core 3 from shifting during mold closing or rotation, and ensuring the dimensional accuracy of the final product and the operational stability of the mold.

[0026] Injection molding machines equipped with this mold system have the following two operating modes: (1) First working mode (mold rotation mode): The cavity is switched by rotating the moving mold part 2 of the mold. In this working mode, the connecting shaft is not connected, and the rotating shaft 8 of the core rotation drive mechanism is disconnected from the core 3. The core 3 is installed on the moving mold part 2 of the mold, as follows: The mold is closed, and plastic of the first color / material is injected into the first cavity formed by the fixed mold plate and the moving mold plate 1 to form part of the product; When the injection molding machine opens the mold, the moving mold plate 1 separates from the fixed mold plate; When the main drive mechanism is started, the main servo motor 5 drives the turntable 6 with an external gear ring to rotate at a preset angle through the drive gear 51. Since the moving mold part 2 of the mold is installed on the turntable 6, the core 3 also rotates synchronously and enters the second injection station. The mold closes again, and plastic of the second color / material is injected into the second cavity, combining with the product part formed in the first mold to complete the molding of the two-color product; After the mold is opened, the finished product is ejected by the injection molding machine's own ejection system.

[0027] In this mode, neither the core rotation drive mechanism nor the ejection mechanism is in operation, and the system operates in an efficient and simple mold transfer manner.

[0028] (2) The second working mode (rotating core mode) is achieved by independently rotating the core 3, as follows: The rear end of the connecting shaft is coaxially fixed with the front end of the rotating shaft 8 of the core rotation drive mechanism, while the front end of the connecting shaft passes through the moving mold part 2 and is detachably fixedly connected to the core 3. The mold is closed, and the first injection molding is performed. Injection molding machine mold opening; When the ejection mechanism is activated, the ejection cylinder 91 drives the ejection drive seat 9, which pushes the rotating shaft 8, the connecting shaft and the core 3 connected to it to move forward (towards the fixed template) a short distance, so that the core 3 is ejected and separated from the mounting position of the moving mold part 2. When the core 3 is pushed away, the core rotation drive mechanism is started. The servo drive motor 7 drives the rotating shaft 8 to rotate through the belt 78 pulley group. The power is transmitted to the core 3 through the connecting shaft, driving it to rotate independently by a preset angle. After the rotation is completed, the top cylinder 91 moves in the opposite direction, pulling the rotating shaft 8 and the connecting shaft backward, causing the core 3, which has completed the rotation, to be re-embedded and fixed in the moving mold part 2; The mold is closed, and the second injection molding is performed. After the mold is opened, the finished product is ejected.

[0029] In this mode, the main drive mechanism (main servo motor 5 and turntable 6) remains stationary, and all rotational movements are completed by the independent core 3 rotation system.

Claims

1. A multi-color injection mold system, comprising a moving template, a moving mold portion, and a core, characterized in that: The moving mold part of the mold is driven by a main drive mechanism and is rotatably mounted on the moving template. The core is detachably mounted on the moving mold portion; Also includes: A ejection mechanism is used to eject the core to separate it from the moving mold portion; A core rotation drive mechanism is used to drive the core to rotate independently after the core is separated from the moving mold part; A detachable connection part is used to realize the transmission connection and separation between the output end of the core rotation drive mechanism and the core.

2. The multi-color injection mold system as described in claim 1, characterized in that... The main drive mechanism includes a turntable driven by a main servo motor, and the turntable is rotatably mounted on the moving template.

3. A multi-color injection mold system as described in claim 2, characterized in that... The turntable is a turntable with an external gear ring. The rotation output end of the main servo motor is coaxially fixed with a matching drive gear, which meshes with the external gear ring of the turntable.

4. A multi-color injection mold system as described in claim 1, characterized in that... The core rotation drive mechanism includes a servo drive motor and a rotating shaft. The detachable connection part is a connecting shaft. The rear end of the rotating shaft is driven to rotate by the servo drive motor. The front end of the rotating shaft is coaxially fixed to the rear end of the connecting shaft in a detachable manner. The front end of the connecting shaft passes through the moving mold part and is detachably fixedly connected to the core.

5. A multi-color injection mold system as described in claim 4, characterized in that... The moving template is provided with a rotating shaft positioning sleeve. The front end of the rotating shaft is rotatably positioned and installed in the rotating shaft positioning sleeve. The rear end of the connecting shaft extends into the rotating shaft positioning sleeve and is coaxially and detachably fixedly connected to the front end of the rotating shaft. The rear end of the connecting shaft is rotatably disposed in the rotating shaft positioning sleeve.

6. A multi-color injection mold system as described in claim 5, characterized in that... The rotating shaft is movably disposed back and forth in the rotating shaft positioning sleeve along its axial direction. The jacking mechanism includes a jacking drive seat, which is disposed at the rear end of the rotating shaft. The jacking drive seat is driven by a jacking cylinder to drive the rotating shaft to move back and forth along its axial direction.

7. A multi-color injection mold system as described in claim 4, characterized in that... The output end of the servo drive motor is provided with a first pulley, and the rear end of the rotating shaft is fixedly connected to a second pulley. The first pulley and the second pulley are connected by a belt drive.

8. A multi-color injection mold system as described in claim 5, characterized in that... The rotating shaft positioning sleeve penetrates the moving template, with its front end placed inside the moving template and its rear end extending out and positioned outside the moving template. The front end of the rotating shaft positioning sleeve and the moving template form an internal water passage. A water-passing shaft is sleeved and connected to the rear end of the rotating shaft positioning sleeve. The water-passing shaft and the rotating shaft positioning sleeve form an external water passage. The internal water passage and the external water passage are mutually sealed and connected.

9. A multi-color injection mold system as described in claim 1, characterized in that... The moving mold part is provided with a positioning post, and the core is provided with a corresponding positioning hole. The positioning post is inserted into the corresponding positioning hole to realize the positioning and installation of the core on the moving mold part.

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