Elliptic cylinder-free driving cylinder of hot runner system

Abstract

The invention discloses a hot runner system elliptic cylinder-free driving cylinder which comprises a mold, a cavity is formed in the mold and serves as a cylinder structure, the cavity is a T-shaped stepped hole, a cylinder cover is installed on the upper portion of the first layer of stepped hole of the cavity, and a fixing screw is arranged between the cylinder cover and the mold; and an upstream runner and a downstream runner are arranged on the side surface of the second-layer stepped hole of the cavity, and are connected with an external driving source. According to the elliptic cylinder-free driving cylinder of the hot runner system, the elliptic section design is adopted, the space utilization rate is optimized through the section design of the elliptic driving cylinder, the elliptic cylinder-free driving cylinder is suitable for a compact mold, the driving cylinder is provided with a high-precision sensor and a control system, and the accuracy and synchronism of valve needle movement are ensured; according to the hot runner driving cylinder system, flexible and efficient motion control is achieved through the oval driving cylinder design, the multi-piston linkage structure and the compact design.

Description

Technical Field

[0001] The present invention relates to the technical field of hot runner systems, and more specifically to an elliptical cylinderless drive cylinder for a hot runner system. Background Art

[0002] A hot runner system is a heating component system used in an injection mold to inject molten plastic particles into the cavity of the mold. A hot runner mold is a brand-new structure that heats the sprue and runner of a traditional mold or a three-plate mold, so that the sprue and runner do not need to be removed during each molding. The hot runner ensures that the plastic in the runner and gate remains in a molten state by heating. Since heating rods and heating coils are provided near or at the center of the runner, the entire runner from the outlet of the injection machine nozzle to the gate is in a high-temperature state, keeping the plastic in the runner molten. Generally, it is not necessary to open the runner to remove the coagulated material after shutdown, and only the runner needs to be heated to the required temperature when starting the machine again. Therefore, the hot runner process is sometimes called a hot manifold system or runnerless molding. During the injection molding process, the hot runner system controls the flow of molten plastic through a valve pin.

[0003] The drive cylinder of a traditional hot runner drive cylinder system is usually circular in design, with a single movement mode, making it difficult to precisely control the movement of multiple valve pins simultaneously. Therefore, a new technical solution is needed to solve this problem. Summary of the Invention

[0004] The purpose of the present invention is to provide an elliptical cylinderless drive cylinder for a hot runner system, which solves the problems raised in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An elliptical cylinderless drive cylinder for a hot runner system, comprising: a mold, a chamber is provided inside the mold and serves as a cylinder structure, the chamber is a T-shaped stepped hole, a cylinder head is installed on the upper part of the first stepped hole of the chamber, and fixing screws are provided between the cylinder head and the mold, an upward flow channel and a downward flow channel are provided on the side of the second stepped hole of the chamber, the upward flow channel and the downward flow channel are connected to an external drive source, a piston body is installed inside the chamber, the upward flow channel and the downward flow channel are respectively arranged below and above the piston body, the lower part of the piston body is fitted with the third stepped hole of the chamber, and a piston chamber is provided inside the piston body, and a valve pin is correspondingly installed in the piston chamber.

[0006] As a preferred embodiment of the present invention, both the cylinder head and the piston body are elliptical structures.

[0007] As a preferred embodiment of the present invention, a sealing ring is provided between the cylinder head and the first stepped hole of the chamber.

[0008] As a preferred embodiment of the present invention, a first seal is provided between the side surface of the piston body and the second stepped hole of the chamber.

[0009] As a preferred embodiment of the present invention, a second seal is provided between the lower part of the piston body and the third stepped hole of the chamber.

[0010] As a preferred embodiment of the present invention, a sensor module is installed inside the cylinder head, and the sensor module includes a temperature sensor, a pressure sensor, and a distance sensor.

[0011] As a preferred embodiment of the present invention, the driving cylinder structure formed by the mold opening is made of a material resistant to high temperature and wear, and the surface is nitrided to improve wear resistance and corrosion resistance.

[0012] As a preferred embodiment of the present invention, the piston chamber in the piston body can be provided with a single, single row or multiple rows, and the same number of valve needles are correspondingly arranged inside. When using a piston body composed of a single, single row or multiple rows of piston chambers, the chamber of the mold also needs to be adjusted correspondingly.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The hot runner system of the present invention adopts an elliptical cylinderless driving cylinder with an elliptical cross-section design. The cross-section design of the elliptical driving cylinder optimizes the space utilization rate and is suitable for compact molds. The driving cylinder is equipped with high-precision sensors and a control system to ensure the accuracy and synchronization of the valve needle movement. The driving cylinder is made of a material resistant to high temperature and wear, and the surface is treated with a plating or coating to improve wear resistance and corrosion resistance. The hot runner driving cylinder system realizes flexible and efficient motion control through the elliptical driving cylinder design, multi-piston linkage structure, and compact design. The hot runner system with an elliptical driving cylinder is suitable for high-precision and high-efficiency injection molding processes, and can significantly improve production efficiency and product quality. Description of the Drawings

[0015] Figure 1 Schematic diagram of the downward movement structure of the single-row piston in the driving cylinder of the present invention;

[0016] Figure 2 Schematic diagram of the upward movement structure of the single-row piston in the driving cylinder of the present invention;

[0017] Figure 3 Schematic diagram of the installation structure of a single piston in the driving cylinder of the present invention;

[0018] Figure 4 Schematic diagram of the structure of a single piston of the present invention;

[0019] Figure 5Schematic diagram of the single-row piston structure of the present invention;

[0020] Figure 6 Schematic diagram of the double-row piston structure of the present invention;

[0021] Figure 7 Data statistical table of the present invention;

[0022] Figure 8 Data bar chart of the present invention.

[0023] In the figure: 1. Mold; 2. Chamber; 3. Cylinder head; 4. Fixing screw; 5. Sensor module; 6. Sealing ring; 7. Piston; 8. Piston chamber; 9. First seal; 10. Second seal; 11. Upward flow channel; 12. Downward flow channel. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-6 , the present invention provides a technical solution: an elliptical cylinderless drive cylinder for a hot runner system.

[0026] Regarding the above problems to be solved: The drive cylinders of traditional hot runner drive cylinder systems are usually circularly designed, with a single movement mode and it is difficult to simultaneously control the precise movement of multiple valve needles

[0027] The solution is as follows: An elliptical cylinderless drive cylinder for a hot runner system, including: a mold, a chamber is provided inside the mold and the chamber serves as a cylinder structure, the chamber is a T-shaped stepped hole, a cylinder head is installed on the upper part of the first stepped hole of the chamber, and fixing screws are provided between the cylinder head and the mold, an upward flow channel and a downward flow channel are provided on the side of the second stepped hole of the chamber, the upward flow channel and the downward flow channel are connected to an external drive source, a piston body is installed inside the chamber, the upward flow channel and the downward flow channel are respectively arranged at the lower part and the upper part of the piston body, the lower part of the piston body is fitted with the third stepped hole of the chamber, and a piston chamber is provided inside the piston body and a valve needle is correspondingly installed in the piston chamber.

[0028] Further improved, as Figure 1 shown: Both the cylinder head and the piston body are elliptical structures. The elliptical design optimizes the space utilization rate, makes the drive cylinder more suitable for compact molds, and improves the overall design flexibility and injection efficiency of the mold.

[0029] Further improved, as Figure 1 shown: A sealing ring is provided between the cylinder head and the first stepped hole of the chamber. The sealing ring enhances the sealing between the cylinder head and the mold, prevents fluid leakage, and ensures the stability and reliability of the hot runner system.

[0030] Further improved, as Figure 1 shown: A first seal is provided between the side surface of the piston body and the second stepped hole of the chamber. The first seal further enhances the seal between the piston and the chamber, prevents the leakage of internal fluid, and ensures the normal operation and high efficiency of the hot runner system.

[0031] Further improved, as Figure 1 shown: A second seal is provided between the lower part of the piston body and the third stepped hole of the chamber. The second seal provides additional sealing protection for the piston and the bottom of the chamber, further prevents fluid leakage, and improves the sealing performance and durability of the system.

[0032] Further improved, as Figure 1 shown: A sensor module is installed inside the cylinder head. The sensor module includes a temperature sensor, a pressure sensor, and a distance sensor. The high-precision sensor module can real-time monitor key parameters such as the temperature, pressure, and piston position of the hot runner system, provide accurate data support for the control system, ensure the accuracy and synchronization of the valve needle movement, and improve the stability of the injection molding process and the product quality.

[0033] Further improved, the drive cylinder structure formed by the mold opening is made of high-temperature resistant and wear-resistant materials, and the surface is nitrided to improve wear resistance and corrosion resistance.

[0034] Further improved, as Figure 4 、 5 、6 shown: The piston chamber in the piston body can be set with a single, single row, or multiple rows, and the same number of valve needles are correspondingly arranged inside. When using a piston body composed of a single, single row, or multiple row piston chambers, the chamber of the mold also needs to be adjusted correspondingly. This flexible design enables the hot runner system to be customized according to different injection molding requirements, improves the adaptability and flexibility of the system. At the same time, the multi-piston linkage structure can achieve more complex and precise motion control, meeting the requirements of high-precision injection molding process.

[0035] Working principle: The elliptical cylinderless drive cylinder of the hot runner system adopts an elliptical cross-section design. The cross-section design of the elliptical drive cylinder optimizes the space utilization rate and is suitable for compact molds. The drive cylinder is equipped with high-precision sensors and control systems to ensure the accuracy and synchronization of the valve pin movement. The drive cylinder uses high-temperature and wear-resistant materials, and the surface is treated with plating or coating to improve wear resistance and corrosion resistance. The hot runner drive cylinder system realizes flexible and efficient motion control through the elliptical drive cylinder design, multi-piston linkage structure, and compact design. The hot runner system with an elliptical drive cylinder is suitable for high-precision and high-efficiency injection molding processes, which can significantly improve production efficiency and product quality.

[0036] The relevant data of this solution are as Figure 7 and Figure 8 shown:

[0037] It can be seen from the data and charts that the elliptical cylinderless drive cylinder is superior to the traditional circular drive cylinder in multiple key performance indicators. In terms of space utilization rate, the elliptical design reduces the proportion of the mold installation space, providing a better solution for compact molds. The movement accuracy of the valve pin is significantly improved, and the positioning error is greatly reduced, which is crucial for high-precision injection molding and directly reduces the defective rate of injection products. In terms of the flexibility of mold applicability, the elliptical drive cylinder can be adapted to more types of molds, enhancing the versatility of the system. In terms of the stability of the hot runner system, the continuous stable operation time of the elliptical drive cylinder increases, reducing production interruptions caused by system failures and improving production efficiency, which strongly proves its technical advantages.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0039] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the described object changes, the relative position relationship may change.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An elliptical cylinderless drive cylinder for a hot runner system, characterized in that: Including: A mold (1), inside which there is a chamber (2) serving as a cylinder structure. The chamber (2) is a T-shaped stepped hole. On the upper part of the first stepped hole of the chamber (2), a cylinder head (3) is installed, and there are fixing screws (4) between the cylinder head (3) and the mold (1). On the side of the second stepped hole of the chamber (2), an upward flow channel (11) and a downward flow channel (12) are provided. The upward flow channel (11) and the downward flow channel (12) are connected to an external driving source. Inside the chamber (2), a piston body (7) is installed. The upward flow channel (11) and the downward flow channel (12) are respectively arranged at the lower part and the upper part of the piston body (7). The lower part of the piston body (7) is fitted with the third stepped hole of the chamber (2). Inside the piston body (7), there is a piston chamber (8), and a valve needle is correspondingly installed in the piston chamber (8).

2. The elliptical cylinderless drive cylinder of a hot runner system according to claim 1, characterized in that: Both the cylinder head (3) and the piston body (7) are oval structures.

3. The elliptical cylinderless drive cylinder of a hot runner system according to claim 1, wherein: A sealing ring (6) is provided between the cylinder head (3) and the first stepped hole of the chamber (2).

4. The elliptical cylinderless drive cylinder of a hot runner system according to claim 1, characterized in that: A first sealing member (9) is provided between the side of the piston body (7) and the second stepped hole of the chamber (2).

5. The elliptical cylinderless drive cylinder of a hot runner system according to claim 1, characterized in that: A second sealing member (10) is provided between the lower part of the piston body (7) and the third stepped hole of the chamber (2).

6. The elliptical cylinderless drive cylinder of a hot runner system according to claim 1, wherein: Inside the cylinder head (3), a sensor module (5) is installed. The sensor module (5) includes a temperature sensor, a pressure sensor, and a distance sensor.

7. The elliptical cylinderless drive cylinder of a hot runner system according to claim 1, wherein: The driving cylinder structure formed by opening holes in the mold (1) is made of a material with high temperature resistance and wear resistance, and its surface is nitrided to improve wear resistance and corrosion resistance.

8. A hot runner system elliptical cylinderless drive cylinder according to claim 1, characterized in that: The piston chamber (8) in the piston body (7) can be set to be single, single-row or multi-row, and the same number of valve needles are correspondingly arranged inside. When using a piston body (7) composed of a single, single-row or multi-row piston chamber (8), the chamber (2) of the mold (1) also needs to be adjusted correspondingly.

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