A rotary disc pipeline structure of a multi-component horizontal opposed injection molding machine

Abstract

The application discloses a rotary disc pipeline structure of a multi-component horizontal opposed injection molding machine, which comprises a rotating main shaft assembly, a terminal fixed assembly, and a pipeline follow-up compensation mechanism arranged between the rotating main shaft assembly and the terminal fixed assembly.

Description

Technical Field

[0001] This invention relates to the technical field of injection molding machines, and more particularly to a rotary table piping structure for a multi-component horizontal through-jet injection molding machine. Background Technology

[0002] Injection molding machines are the industrial mother machines of plastic molding. Horizontal through-shot injection molding machines are a special type of injection molding machine. Compared to traditional vertical rotary multi-component injection molding machines, they have advantages such as larger mold capacity and easier mold installation. Horizontal through-shot injection molding machines are widely used in the injection molding of interior and exterior trim, headlights, and other products in the automotive industry. The rotary table piping system is a key component of the horizontal through-shot injection molding machine. It determines the number and diameter of oil and water channels in the middle mold platen, as well as the overall height of the machine. The rotary table piping system mainly completes the horizontal rotation motion of the rotary mold wall (0→180→0) and the linear motion of mold opening and closing. It ensures the smooth connection of electricity, oil, and water in these two combined motion processes.

[0003] Currently, there are four main types of rotary table piping systems for horizontal injection molding machines on the market: (1) The layout of "rotating water jacket" + "double vertical drag chain in the straight direction of mold opening and closing" of the imported machine "E factory"; (2) The layout of "independent large pipeline semi-torsion structure" + "high pressure high speed rotary joint" + "double vertical drag chain in the straight direction of mold opening and closing" of the domestic machine "Mou Rui"; (3) The layout of "independent large pipeline rotary spindle mode" + "double vertical drag chain in the straight direction of mold opening and closing" of the domestic machine "Fu Qiang Xin"; (4) The layout of "independent large pipeline to multiple small pipes, small pipe rotary spindle, small pipe re-merging mode" + "double vertical drag chain in the straight direction of mold opening and closing" of the domestic machine "Mou Tian".

[0004] The main difference between the above four methods lies in the different layout of the 0→180→0 rotational motion pipeline of the turntable mold wall, while the arrangement of the opening and closing motion is the same; Method (1) is the current mainstream structure, and many other domestic brands are also using similar structures. Rotary water jacket form: the water jacket shaft and the rotary spindle are the same shaft. The external adapter connection is simple, the structural space occupies a moderate amount, the internal structure is relatively complex, the processing difficulty is high, the processing cost is high, and the assembly and fit tolerance requirements are high. The number of independent water and oil circuits is limited. There are requirements for the overall height of the machine. After the internal passage of the rotating water jacket is blocked by scale, the maintenance requires the entire water jacket (rotary spindle) to be disassembled and cleaned, which is costly and time-consuming. The two ends of the water jacket shaft need to be connected and transitioned by other pipelines, which increases the connection points and increases the risk of oil leakage. Method (2) is "independent large pipeline semi-torsion structure" + "high pressure high speed rotary joint". The external adapter connection is simple, the structural space occupies a moderate amount, and each pipe needs to be installed with "high pressure high speed rotary joint", which has a high cost. In the form of semi-torsion + rotary joint, the locking nut is easy to loosen due to repeated forward and reverse torsion during long-term use of the pipeline, eventually leading to the pipe falling off. Method (3) is the "independent large pipeline rotating spindle method". The external connection is relatively complicated, occupies a large structural space, and multiple sets of pipelines need to be arranged, bundled and fixed. The pipeline is coiled around the spindle and rotates. During the rotation, there is friction between the coiled pipe and the inner wall of the machine and between the pipes. The pipe is not durable and is easily worn. The large pipe has a large bending radius. The coiled pipe method occupies a large structural space and has a small maintenance space, making maintenance inconvenient. Method (4) "independent large pipe rotating multiple sets of small pipes, small pipes rotating the spindle, and small pipes merging again" has a complicated external connection and occupies a large structural space. Multiple sets of pipelines need to be arranged, bundled and fixed. The pipeline is coiled around the spindle and rotates. During the rotation, there is friction between the coiled pipe and the inner wall of the machine and between the pipes. The pipe is not durable and is easily worn. The coiled pipe method occupies a large structural space, leaving little space for maintenance and making maintenance inconvenient. Summary of the Invention

[0005] (a) Technical problems to be solved The technical problem to be solved by the present invention is to provide a rotary table piping structure for a multi-component horizontal through-jet injection molding machine. By setting a piping follow-up compensation mechanism composed of a large rocker arm assembly and a small rocker arm assembly, the complex and difficult-to-process rotating water jacket shaft structure and the expensive high-pressure high-speed rotary joint in the prior art are replaced. The purely mechanical follow-up compensation mechanism has fewer parts and a simpler processing technology, which greatly reduces the production cost and assembly accuracy requirements of the rotary table piping system, and is conducive to mass production and promotion.

[0006] (II) Technical Solution The solution adopted by this invention to solve the above-mentioned technical problems is a rotary table piping structure for a multi-component horizontal through-jet injection molding machine, including... A rotating spindle assembly is used to be fixedly connected to the turntable mold wall of the injection molding machine and to rotate around the horizontal axis with the turntable mold wall from 0 to 180°. The end-mounted fixing assembly is installed on the injection molding machine frame as a fixed interface for external pipe connections; and A pipeline follow-up compensation mechanism is disposed between the rotating spindle assembly and the end fixing assembly; The pipeline follow-up compensation mechanism includes a large rocker arm assembly and a small rocker arm assembly; One end of the large rocker arm assembly is rotatably engaged with the rotating spindle assembly via a rotating shaft, and the large rocker arm assembly has a first rotation limit relative to the rotating spindle assembly; The small rocker arm assembly is connected to the other end of the large rocker arm assembly and can rotate freely about this end relative to the large rocker arm assembly; the small rocker arm assembly is provided with an anti-reverse positioning limiting mechanism to restrict the small rocker arm assembly from retracting towards the rotating spindle assembly; The flow channel pipe leading out from the turntable mold wall passes through the interior of the rotating spindle assembly, then sequentially passes through the large rocker arm assembly and the small rocker arm assembly, and finally connects to the end fixing assembly.

[0007] By adopting the above scheme, a pipeline follow-up compensation mechanism composed of a large rocker arm assembly and a small rocker arm assembly is set up to replace the complex and difficult-to-process rotating water jacket shaft structure and the expensive high-pressure high-speed rotary joint in the existing technology. The purely mechanical follow-up compensation mechanism has fewer parts and simpler processing technology, which greatly reduces the production cost and assembly accuracy requirements of the rotary table pipeline system, and is conducive to mass production and promotion.

[0008] In some embodiments, the rotating spindle assembly includes a turntable shaft sleeve and a rotating shaft cover plate, and the large rocker arm assembly passes through the turntable shaft sleeve via a rotating shaft; the turntable shaft sleeve is provided with an arc-shaped groove, and the rotating shaft cover plate is provided with a limiting block extending into the arc-shaped groove; the arc-shaped groove cooperates with the limiting block to limit the rotation angle of the large rocker arm assembly relative to the turntable shaft sleeve to 90°.

[0009] In some embodiments, the outer side of the turntable sleeve is provided with an installation interface for installing a water pipe adapter.

[0010] Specifically, the turntable shaft sleeve is provided with two spaced arc-shaped grooves, and the rotating shaft cover plate is provided with two limiting blocks that are respectively adapted to the two arc-shaped grooves; and when one end of the limiting block abuts against one side wall of the arc-shaped groove it adapts to, the angle between the other end of the limiting block and the center line connecting the other side of the arc-shaped groove it adapts to is 90°; that is, when the large rocker arm assembly rotates to 90° relative to the turntable shaft sleeve, the limiting block abuts against the end wall of the arc-shaped groove and stops rotating.

[0011] By adopting the above solution, the arc groove on the turntable sleeve and the limiting block on the rotating shaft cover plate are used to achieve a built-in 90° mechanical hard limit, realizing an integrated design. This not only eliminates the need for external additional limiting components, but also uses the physical interference between the arc groove and the limiting block to prevent the large rocker arm assembly from colliding with the inner wall of the machine tool due to excessive inertial swing during high-speed rotation, thus improving the safety of the structure and providing extremely high limiting accuracy.

[0012] In some embodiments, the large rocker arm assembly includes a large rocker arm and a rotating shaft. One end of the rotating shaft is rigidly connected to the large rocker arm, and the other end of the rotating shaft passes through the turntable shaft sleeve and is rigidly connected to the rotating shaft cover plate. A first wear-resistant member is provided between the turntable shaft sleeve and the rotating shaft, and the outer peripheral wall of the rotating shaft is rotatably engaged with the first wear-resistant member.

[0013] In some embodiments, the turntable shaft sleeve is provided with a shaft sleeve having a cavity extending vertically, the rotating shaft being rotatably fitted within the cavity, and the rotating shaft cover plate being rigidly connected to the top end of the rotating shaft, wherein the top end of the rotating shaft cover plate is flush with the top end of the rotating shaft sleeve, and the inner wall of the top end of the rotating shaft sleeve is provided with an arc-shaped groove, the rotating shaft cover plate having a limiting stop adapted to the arc-shaped groove; the first wear-resistant member is disposed on the inner wall of the rotating shaft sleeve, so that the rotating shaft forms a low-friction rotational fit with the first wear-resistant member when rotating.

[0014] The above scheme is adopted, in which the rotating shaft passes through the turntable shaft sleeve and is rigidly connected to the rotating shaft cover plate, forming a double-support rigid support structure. Combined with the rotating friction pair formed by the first wear-resistant part, it greatly improves the resistance to eccentric load and bending, and can withstand long-term high-frequency 0-180° reciprocating torque.

[0015] In some embodiments, the small rocker arm assembly includes a small rocker shaft, which is vertically inserted through the end of the large rocker arm assembly away from the rotation axis; a second wear-resistant member is provided between the small rocker shaft and the large rocker arm assembly, allowing the small rocker arm assembly to rotate freely in a 360° circumferential direction relative to the large rocker arm assembly; the anti-reverse positioning limiting mechanism includes an anti-overlap groove disposed on the side of the large rocker arm assembly, and a fine-tuning shaft disposed on the small rocker arm assembly and extending into the anti-overlap groove; when the small rocker arm assembly rotates counterclockwise and approaches the rotating spindle assembly, the fine-tuning shaft interferes with and blocks the groove wall of the anti-overlap groove, thereby restricting the small rocker arm assembly from rotating counterclockwise past the large rocker arm assembly.

[0016] By adopting the above solution, the fine-tuning shaft extends into the anti-overrun groove, forming a one-way physical interference barrier. When the small rocker arm assembly rotates counterclockwise and approaches the main shaft, the fine-tuning shaft immediately interferes with the groove wall of the anti-overrun groove, forcibly restricting the small rocker arm assembly from rotating counterclockwise past the large rocker arm assembly. This ensures that the water pipe always bends along the preset trajectory (towards the center), fundamentally eliminating the risk of pipe entanglement and dead bends.

[0017] In some embodiments, the anti-reverse positioning limiting mechanism further includes two axial pressure plates, which are respectively disposed on the upper and lower sides of the small rocker arm assembly and rigidly fixedly connected to the small rocker arm assembly; the fine-tuning shaft is fastened between the two axial pressure plates; the fine-tuning shaft passes through the upper and lower axial pressure plates in sequence, and the lower end of the fine-tuning shaft passes through the axial pressure plate near the large rocker arm assembly and extends into the anti-overrun groove.

[0018] Specifically, when the injection molding machine turntable starts to rotate, if the small rocker arm assembly rotates counterclockwise relative to the large rocker arm assembly and approaches the rotating spindle assembly, the lower end of the fine-tuning shaft will immediately interfere with and block the anti-overrun groove wall, thereby forcibly restricting the small rocker arm assembly from rotating counterclockwise past the large rocker arm assembly, thus achieving mechanical constraint on the water pipe trajectory.

[0019] The above scheme uses two axial pressure plates to clamp the fine-tuning shaft. The fine-tuning shaft passes through the upper and lower axial pressure plates and extends into the lower anti-overlap groove. This double-plate clamping sandwich fixing method gives the fine-tuning shaft extremely high shear and bending stiffness when under force, effectively preventing the fine-tuning shaft from tilting or falling off due to long-term high-frequency collision with the groove wall, ensuring the permanent effectiveness of the anti-overlap function, and significantly improving the long service life of the structure.

[0020] In some embodiments, the flow channel includes a first pipe section connecting the rotating spindle assembly and the small rocker arm assembly, and a second pipe section connecting the small rocker arm assembly and the end fixing assembly; when the turntable mold wall is in the initial 0° position, the second pipe section is pre-configured to a slightly curved initial shape towards the center of the injection molding machine; during the process of the turntable mold wall rotating from 0° to 180°, the first pipe section always maintains a straight tension state and transmits tangential thrust to drive the small rocker arm assembly, and the second pipe section, under the action of the tangential thrust of the small rocker arm assembly and the fixing constraint of the end fixing assembly, undergoes continuous bending deformation from the initial shape towards the center of the injection molding machine to compensate for the change in the distance between the rotating spindle assembly and the end fixing assembly.

[0021] Specifically, the initial shape design: When the rotary mold wall is in the initial 0° position, the second pipe section is pre-configured with a slightly curved initial shape towards the center of the injection molding machine. This pre-bent initial shape is achieved by controlling the length allowance of the water pipe during assembly.

[0022] Motion Compensation Process: During the rotation of the turntable mold wall from 0° counterclockwise to 180°, the first pipe section remains in a straight-line tensioned state because its two ends are fixedly connected to the rotating spindle assembly and the small rocker arm assembly, respectively, and their linear distance remains constant. Driven by the rotational torque of the turntable, the first pipe section transmits tangential thrust through its own tension, causing the small rocker arm assembly to rotate clockwise relative to it. When the small rocker arm assembly is pushed, one end of the second pipe section is subjected to the tangential thrust transmitted from the small rocker arm assembly, while the other end is held fixed by the end fixing assembly. Since the length of the second pipe section remains unchanged but the distance between its two ends shortens, the second pipe section undergoes continuous and controlled bending deformation under the dual action of thrust and fixed constraint, and the deformation direction always faces the geometric center line of the machine. This deformation process effectively compensates for the change in spatial distance between the rotating spindle assembly and the end fixing assembly caused by the rotation of the turntable. Because the entire deformation process is a natural bending, the pipe is only subjected to a simple bending moment, effectively avoiding the S-shaped twisting, stretching, and high-frequency fatigue wear found in traditional cable chains or torsion structures.

[0023] By adopting the above scheme, functional decoupling is achieved by dividing the motion trajectory into tension transmission of the first pipe section and pure bending deformation of the second pipe section. The first pipe section only transmits tangential force, while the second pipe section is subjected to pure bending moment and undergoes bending deformation. This motion logic of the first pipe section remaining tensioned and the second pipe section bending naturally reduces the stress mode of the water pipe from composite torsional tension to uniaxial pure bending moment. The fatigue life under pure bending moment is much greater than that under torsion, thereby significantly extending the actual service life of the water pipe.

[0024] In some embodiments, the end fixing assembly includes a water channel fixing bracket and a through-plate connector fixing plate; the through-plate connector fixing plate is sleeved on the vertical axis of the water channel fixing bracket, and the upper and lower ends of the through-plate connector fixing plate are respectively axially limited and fixed to the vertical axis by limiting members, so that the through-plate connector fixing plate can rotate freely in the horizontal plane with the vertical axis as the axis, while being locked in the vertical direction; in order to lock the pipe posture after the pipe is laid, the vertical axis of the water channel fixing bracket is provided with a plurality of adjusting screw holes distributed along the axial direction, and the through-plate connector fixing plate is provided with fasteners accordingly. The fasteners pass through the through-plate connector fixing plate and are selectively locked in any one of the adjusting screw holes, so as to restrict the through-plate connector fixing plate within a specific rotation angle range.

[0025] Specifically, during actual assembly, the operator can first allow the plate connector fixing plate to rotate freely to straighten the pipeline posture, and then insert the fastening screws and selectively tighten the fastener into any one of the adjusting screw holes, thereby locking the plate connector fixing plate within a specific rotation angle range to prevent vibration during equipment operation from causing directional deviation.

[0026] Using the above solution, the through-plate joint fixing plate can rotate freely around the vertical axis, allowing operators to rotate it freely during the pipe laying stage to naturally straighten the pipe route. Then, the position can be completely locked by adjusting the screw holes and fasteners. This not only avoids the initial damage to the water pipe caused by forced assembly, but also effectively prevents the joint direction from drifting due to long-term vibration of the equipment after locking, ensuring the long-term stable position of the pipeline system.

[0027] In some embodiments, the rotating spindle assembly is provided with a turntable water jacket. The input end of the turntable water jacket is fixedly connected to the mold wall water drain on the turntable mold wall. The bottom end of the turntable water jacket is embedded in the turntable shaft sleeve of the rotating spindle assembly and connects with the internal channel of the turntable shaft sleeve. After the flow channel is led out from the mold wall water drain, it first passes through the corresponding channel in the turntable water jacket and then enters the interior of the turntable shaft sleeve. The pipeline between the mold wall water drain and the turntable water jacket remains stationary relative to the turntable water jacket, so there is basically no wear in this section.

[0028] In some embodiments, the turntable water jacket is a stepped cylindrical structure with its top opening connected to the mold wall water drain at the bottom of the turntable mold wall, and its bottom end nested and embedded inside the turntable shaft sleeve of the rotating spindle assembly. After being sealed by a sealing ring, it is connected to each axial channel inside the turntable shaft sleeve.

[0029] Using the above scheme, the bottom end of the rotary water jacket is embedded in the rotary shaft sleeve and sealed together, forming a highly integrated rotating body. Furthermore, it clearly stipulates that the pipeline between the mold wall water drain and the rotary water jacket remains stationary, meaning that this part of the pipeline does not undergo any relative movement during rotary rotation, and is in a zero-wear state. All relative displacement is concentrated in the remote compensation mechanism, greatly reducing the wear points of the entire system.

[0030] In some embodiments, the rotating spindle assembly has multiple independent axial channels inside, and the flow channel includes multiple independent flow channel branches; the rotating shaft cover plate has a number of through holes, and each flow channel branch passes through the corresponding through hole from the inside of the rotating spindle assembly to the large rocker arm assembly; the large rocker arm assembly and the small rocker arm assembly are both located on the horizontal side of the rotating spindle assembly, and the rotation axes of the large rocker arm assembly and the small rocker arm assembly are parallel to the horizontal rotation axis of the rotating spindle assembly. The swing trajectory of the large rocker arm assembly and the small rocker arm assembly in the horizontal plane is coplanar with the rotation plane of the turntable mold wall, resulting in an extremely compact structure and neat wiring.

[0031] The working fluid flow path of this invention is as follows: water (or oil) exits from the external mold temperature device at the client end, enters the through-plate joint of the end fixing component, passes through the second pipe section, passes through the first pipe section, enters the axial channel of the turntable sleeve, passes through the corresponding flow channel inside the turntable water jacket, flows out from the mold wall water drain, enters various areas of the mold for heat exchange, flows back from the other side of the mold water drain, and returns to the external mold temperature device via the above path. During this process, the short connecting water pipe between the mold wall water drain and the turntable water jacket is fixed on the rotating body, and there is no relative displacement between the two during operation, resulting in virtually no risk of wear. Only a section of water pipe (including the first and second pipe sections) between the turntable sleeve and the end fixing component has relative displacement, and this is precisely compensated for by the pipe follow-up compensation mechanism of this invention, achieving low-stress bending compensation.

[0032] In some embodiments, a multi-zone temperature control system is also included to achieve precise temperature control in different zones of the mold during multi-component injection molding. The multi-zone temperature control system includes: Temperature and flow sensing units are installed on the inlet and outlet water lines of each independent temperature control zone of the mold to collect temperature and flow signals of the fluid medium. An external mold temperature control device, connected to the rotary table piping structure, is used to heat or cool the fluid medium entering the mold. The main controller of the injection molding machine is equipped with a centralized HMI human-machine interface and is connected to the external mold temperature device via a communication bus; The temperature and flow sensing unit feeds back the collected signals to the main controller of the injection molding machine. The main controller displays the sensing data of each temperature control zone in real time on the centralized HMI human-machine interface, and sends temperature adjustment commands for each temperature control zone to the external mold temperature device through the communication bus according to the pre-stored process parameters. The external mold temperature device responds to the commands and adjusts the temperature of the output fluid medium, thereby completing the real-time and precise control of the temperature of each zone of the multi-component injection molding machine mold in a closed loop.

[0033] Specifically, temperature and flow sensing units are installed on the connecting pipes between the water drains on both sides of the rotary mold wall and the water jacket of the rotary mold, specifically on the stationary side of the pipe follow-up compensation mechanism. This installation position ensures that the sensors are not disturbed by the follow-up displacement during the rotation of the rotary mold wall, guaranteeing the stability of signal acquisition. The temperature and flow sensing units are used to collect the temperature and flow rate of the fluid medium entering each independent temperature control zone of the mold. The external mold temperature equipment has multiple independent temperature control channels, which are connected to each temperature control zone of the mold through the aforementioned rotary mold pipe structure, for heating or cooling the fluid medium entering the mold. During operation, the sensing units located on the mold side transmit the real-time temperature and flow signals to the main controller of the injection molding machine. The main controller of the injection molding machine displays the real-time curves and values ​​of each temperature control zone on a centralized HMI interface. Operators only need to set the target temperature and allowable temperature difference threshold for different mold zones on the main control interface of the injection molding machine. The main controller of the injection molding machine will then calculate the deviation value in real time based on the pre-stored process parameters and send temperature adjustment commands (such as turning on the heating element or increasing the opening of the cooling water valve) to the external mold temperature device via the communication bus for each temperature control zone. After responding to the commands, the external mold temperature device independently adjusts the output fluid temperature of each channel, thus forming a complete closed-loop control. With this integrated approach, the injection molding machine operator no longer needs to leave the main control position to adjust the external mold temperature device panel, and the front-mounted temperature and flow sensing unit greatly shortens the temperature feedback lag time, improving the yield rate of multi-component injection molding.

[0034] (III) Beneficial Effects Compared with the prior art, the present invention designs a rotary table piping structure for a multi-component horizontal through-jet injection molding machine. (1) The present invention replaces the complex and difficult-to-process rotating water jacket shaft structure and the expensive high-pressure high-speed rotary joint in the prior art by setting up a pipeline follow-up compensation mechanism composed of a large rocker arm assembly and a small rocker arm assembly. The purely mechanical follow-up compensation mechanism has fewer parts and simpler processing technology, which greatly reduces the production cost and assembly accuracy requirements of the rotary disc pipeline system, and is conducive to mass production and promotion. (2) The present invention uses the arc groove on the turntable sleeve and the limiting block on the rotating shaft cover to achieve a self-contained 90° mechanical hard limit, realizing an integrated design. It not only eliminates the external additional limiting parts, but also uses the physical interference between the arc groove and the limiting block to prevent the large rocker arm assembly from colliding with the inner wall of the machine due to excessive inertial swing during high-speed rotation, thus improving the safety of the structure and achieving extremely high limiting accuracy. (3) The present invention forms a one-way physical interference barrier by extending the fine adjustment shaft into the anti-overrun groove. When the small rocker arm assembly rotates counterclockwise and approaches the main shaft, the fine adjustment shaft immediately interferes with the groove wall of the anti-overrun groove, forcibly restricting the small rocker arm assembly from rotating counterclockwise past the large rocker arm assembly, ensuring that the water pipe always bends along the preset trajectory (towards the center), fundamentally eliminating the risk of pipe entanglement and dead bend; (4) This invention achieves functional decoupling by dividing the motion trajectory into tension transmission of the first pipe section and pure bending deformation of the second pipe section; the first pipe section only transmits tangential force, and the second pipe section only undergoes bending deformation under pure bending moment; this motion logic of the first pipe section remaining tensioned and the second pipe section bending naturally reduces the stress mode of the water pipe from composite torsional tension to uniaxial pure bending moment, and the fatigue life under pure bending moment is much greater than that under torsion, thereby greatly extending the actual service life of the water pipe; (5) The through-plate joint fixing plate of the present invention can rotate freely around the vertical axis, allowing the operator to rotate freely during the pipe laying stage to naturally straighten the direction of the pipe, and then lock the posture completely by adjusting the screw holes and fasteners. This not only avoids the initial damage to the water pipe caused by forced assembly, but also effectively prevents the joint direction drift caused by long-term vibration of the equipment after locking, ensuring the long-term stable posture of the pipeline system. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the rotary table piping structure and rotary table mold wall assembly of a multi-component horizontal through-jet injection molding machine according to the present invention. Figure 2 This is a schematic diagram of the first angle of the rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention. Figure 3 This is a schematic diagram of the second angle of the rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention. Figure 4 This is a schematic diagram of the third angle structure of the rotary table pipeline structure of a multi-component horizontal through-jet injection molding machine according to the present invention. Figure 5 This is a cross-sectional view of the rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention; Figure 6 This is a schematic diagram of the fourth angle of the rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention. Figure 7 This is a schematic diagram of the end-fixing component of the present invention; Figure 8 This is a schematic diagram of the rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention, with the rotary mold wall at 0°. Figure 9 This is a schematic diagram of the rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention, with the rotary mold wall at 180°. Figure 10 This is a schematic diagram of a multi-zone temperature control system for a rotary table piping structure of a multi-component horizontal through-jet injection molding machine according to the present invention.

[0037] The component names corresponding to the various reference numerals in the figure are as follows: 10, Turntable mold wall; 11, Mold wall water drain; 20, Temperature and flow rate sensing unit; 30, External mold temperature equipment; 40, Injection molding machine main controller; 100, Rotary spindle assembly; 101, Turntable shaft sleeve; 1011, Arc groove; 1012, Rotary shaft sleeve; 1012a, Cavity; 102, Rotary shaft cover plate; 1021, Limiting block; 103, Turntable water jacket; 200, End fixing assembly; 201. Waterway fixing bracket; 2011, vertical shaft; 202, through plate joint fixing plate; 300, large rocker arm assembly; 301, rotating shaft; 302, large rocker arm; 400, small rocker arm assembly; 401, small rocker arm shaft; 500, anti-reverse positioning limit mechanism; 501, anti-overlap groove; 502, fine-tuning shaft; 503, shaft pressure plate; 600, first wear-resistant component; 700, second wear-resistant component; 800, flow channel pipeline; 801, first pipeline section; 802, second pipeline section. Detailed Implementation

[0038] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that the following description covers various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0042] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0044] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0045] like Figures 1-10As shown, this embodiment provides a rotary table piping structure for a multi-component horizontal through-jet injection molding machine, including a rotating spindle assembly 100 for fixed connection to the rotary mold wall 10 of the injection molding machine and rotating around the horizontal axis from 0 to 180° with the rotary mold wall 10; an end fixing assembly 200, mounted on the injection molding machine frame, serving as a fixed interface for external piping; and a piping follow-up compensation mechanism, disposed between the rotating spindle assembly 100 and the end fixing assembly 200; wherein, the piping follow-up compensation mechanism includes a large rocker arm assembly 300 and a small rocker arm assembly 400; one end of the large rocker arm assembly 300 is connected to the rotating spindle assembly 100 via a rotating shaft 301. The large rocker arm assembly 300 has a first rotation limit relative to the rotating spindle assembly 100; the small rocker arm assembly 400 is connected to the other end of the large rocker arm assembly 300 and can rotate freely around that end relative to the large rocker arm assembly 300; the small rocker arm assembly 400 is provided with an anti-reverse positioning limit mechanism 500 for limiting the small rocker arm assembly 400 from retracting towards the rotating spindle assembly 100; the flow channel pipe 800 leading out from the turntable mold wall 10 passes through the interior of the rotating spindle assembly 100, passes sequentially through the large rocker arm assembly 300 and the small rocker arm assembly 400, and finally connects to the end fixing assembly 200. By adopting the above scheme, a pipeline follow-up compensation mechanism composed of a large rocker arm assembly 300 and a small rocker arm assembly 400 is set up to replace the complex and difficult-to-process rotating water jacket shaft structure and the expensive high-pressure high-speed rotary joint in the existing technology. This purely mechanical follow-up compensation mechanism has fewer parts and simpler processing technology, which greatly reduces the production cost and assembly accuracy requirements of the rotary table pipeline system, and is conducive to mass production and promotion.

[0046] In this embodiment, the rotating spindle assembly 100 includes a turntable shaft sleeve 101 and a rotating shaft cover plate 102. The large rocker arm assembly 300 passes through the turntable shaft sleeve 101 via a rotating shaft 301. The turntable shaft sleeve 101 has an arc-shaped groove 1011, and the rotating shaft cover plate 102 has a limiting block 1021 extending into the arc-shaped groove 1011. The arc-shaped groove 1011 cooperates with the limiting block 1021 to limit the rotation angle of the large rocker arm assembly 300 relative to the turntable shaft sleeve 101 to 90°. In this embodiment, the turntable shaft sleeve 101 has an installation interface on its outer side for installing a water pipe adapter. Specifically, the turntable shaft sleeve 101 is provided with two spaced arc-shaped grooves 1011, and the rotating shaft cover plate 102 is provided with two limiting blocks 1021 respectively adapted to the two arc-shaped grooves 1011; and when one end of the limiting block 1021 abuts against one side of the groove wall of the arc-shaped groove 1011 it adapts to, the angle between the other end of the limiting block 1021 and the center line connecting the other side of the arc-shaped groove 1011 it adapts to is 90°; that is, when the large rocker arm assembly 300 rotates to 90° relative to the turntable shaft sleeve 101, the limiting block 1021 abuts against the end wall of the arc-shaped groove 1011 and stops rotating. By adopting the above solution, the arc groove 1011 on the turntable shaft sleeve 101 and the limiting block 1021 on the rotating shaft cover plate 102 cooperate to achieve a built-in 90° mechanical hard limit, realizing an integrated design. This not only eliminates the need for external additional limiting components, but also utilizes the physical interference between the arc groove 1011 and the limiting block 1021 to prevent the large rocker arm assembly 300 from colliding with the inner wall of the machine tool due to excessive inertial swing during high-speed rotation, thus improving the safety of the structure and achieving extremely high limiting accuracy.

[0047] In this embodiment, the large rocker arm assembly 300 includes a large rocker arm 302 and a rotating shaft 301. One end of the rotating shaft 301 is rigidly connected to the large rocker arm 302, and the other end of the rotating shaft 301 passes through the turntable shaft sleeve 101 and is rigidly connected to the rotating shaft cover plate 102. A first wear-resistant component 600 is provided between the turntable shaft sleeve 101 and the rotating shaft 301, and the outer peripheral wall of the rotating shaft 301 is rotatably engaged with the first wear-resistant component 600. In this embodiment, the turntable shaft sleeve 101 is provided with a shaft sleeve 1012, the shaft sleeve 102 has a cavity 1012a extending vertically, the rotating shaft 301 is rotatably fitted within the cavity 1012a, and the rotating shaft cover plate 102 is rigidly connected to the top end of the rotating shaft 301, wherein the top end of the rotating shaft cover plate 102 is flush with the top end of the shaft sleeve 1012, and the inner wall of the top end of the shaft sleeve 1012 is provided with an arc-shaped groove 1011, the rotating shaft cover plate 102 has a limiting stop 1021 adapted to the arc-shaped groove 1011; the first wear-resistant member 600 is disposed on the inner wall of the shaft sleeve 1012, so that the rotating shaft 301 forms a low-friction rotational fit with the first wear-resistant member 600 when rotating. Using the above scheme, the rotating shaft 301 passes through the turntable shaft sleeve 101 and is rigidly connected to the rotating shaft cover plate 102, forming a double-support rigid support structure. Combined with the rotating friction pair formed by the first wear-resistant part 600, it greatly improves the resistance to eccentric load and bending, and can withstand long-term high-frequency 0-180° reciprocating torque.

[0048] In this embodiment, the small rocker arm assembly 400 includes a small rocker shaft 401, which is vertically inserted through the end of the large rocker arm assembly 300 away from the rotation axis 301. A second wear-resistant component 700 is provided between the small rocker shaft 401 and the large rocker arm assembly 300, allowing the small rocker arm assembly 400 to rotate freely in a 360° circumferential direction relative to the large rocker arm assembly 300. The anti-reverse positioning limiting mechanism 500 includes an anti-overlap groove 501 disposed on the side of the large rocker arm assembly 300 and a fine-tuning shaft 502 disposed on the small rocker arm assembly 400 and extending into the anti-overlap groove 501. When the small rocker arm assembly 400 rotates counterclockwise and approaches the rotating spindle assembly 100, the fine-tuning shaft 502 interferes with and blocks the groove wall of the anti-overlap groove 501, thereby restricting the small rocker arm assembly 400 from rotating counterclockwise past the large rocker arm assembly 300. By adopting the above solution, the fine-tuning shaft 502 extends into the anti-overrun groove 501, forming a one-way physical interference barrier. When the small rocker arm assembly 400 rotates counterclockwise and approaches the main shaft, the fine-tuning shaft 502 immediately interferes with the groove wall of the anti-overrun groove 501, forcibly restricting the small rocker arm assembly 400 from rotating counterclockwise past the large rocker arm assembly 300. This ensures that the water pipe always bends along the preset trajectory (towards the center), fundamentally eliminating the risk of pipe entanglement and dead bends. In this embodiment, the anti-reverse positioning limiting mechanism 500 further includes two axial pressure plates 503, which are respectively disposed on the upper and lower sides of the small rocker arm assembly 400 and rigidly fixedly connected to the small rocker arm assembly 400; the fine-tuning shaft 502 is fastened between the two axial pressure plates 503; the fine-tuning shaft 502 passes through the upper and lower axial pressure plates 503 in sequence, and the lower end of the fine-tuning shaft 502 passes through the axial pressure plate 503 near the large rocker arm assembly 300 and extends into the anti-overlap groove 501. Specifically, when the injection molding machine turntable begins to rotate, if the small rocker arm assembly 400 rotates counterclockwise relative to the large rocker arm assembly 300 and approaches the rotating spindle assembly 100, the lower end of the fine-tuning shaft 502 will immediately interfere with and block the anti-overrun groove 501, thereby forcibly restricting the small rocker arm assembly 400 from rotating counterclockwise past the large rocker arm assembly 300, achieving mechanical constraint on the water pipe trajectory. Using the above scheme, the fine-tuning shaft 502 is clamped by two upper and lower shaft pressure plates 503. The fine-tuning shaft 502 passes through the upper and lower shaft pressure plates 503 and extends into the lower anti-overrun groove 501. This double-plate clamping sandwich-type fixing method gives the fine-tuning shaft 502 extremely high shear and bending stiffness under stress, effectively preventing the fine-tuning shaft 502 from tilting or falling off due to long-term high-frequency collisions with the groove wall, ensuring the permanent effectiveness of the anti-overrun function, and significantly improving the long service life of the structure.

[0049] In this embodiment, the flow channel 800 includes a first channel section 801 connecting the rotary spindle assembly 100 and the small rocker arm assembly 400, and a second channel section 802 connecting the small rocker arm assembly 400 and the end fixing assembly 200. When the turntable mold wall 10 is in the initial 0° position, the second channel section 802 is pre-configured to be slightly bent towards the center of the injection molding machine. During the process of the turntable mold wall 10 rotating from 0° to 180°, the first channel section 801 always maintains a straight tension state and transmits tangential thrust to drive the small rocker arm assembly 400. The second channel section 802, under the action of the tangential thrust of the small rocker arm assembly 400 and the fixing constraint of the end fixing assembly 200, undergoes continuous bending deformation from the initial state towards the center of the injection molding machine to compensate for the change in the distance between the rotary spindle assembly 100 and the end fixing assembly 200. Specifically, the initial shape design: When the turntable mold wall 10 is in the initial 0° position, the second pipe section 802 is pre-configured with a slightly bent initial shape towards the center of the injection molding machine. This pre-bent initial shape is achieved by controlling the length allowance of the water pipe during assembly. Motion compensation process: During the process of the turntable mold wall 10 rotating counterclockwise from 0° to 180°, since the two ends of the first pipe section 801 are fixedly connected to the rotating spindle assembly 100 and the small rocker arm assembly 400 respectively, their straight-line distance remains unchanged, so the first pipe section 801 always maintains a straight tension state. Driven by the rotation torque of the turntable, the first pipe section 801 transmits tangential thrust through its own tension, causing the small rocker arm assembly 400 to rotate clockwise relative to it. When the small rocker arm assembly 400 is pushed, one end of the second pipe section 802 is subjected to the tangential thrust transmitted from the small rocker arm assembly 400, while the other end is constrained and fixed by the end fixing assembly 200. Because the length of the second pipe section 802 remains constant but the distance between its two ends shortens, the second pipe section 802 undergoes continuous and controlled bending deformation under the combined action of thrust and fixed constraint, and the deformation direction always faces the geometric center line of the machine. This deformation process effectively compensates for the change in spatial distance between the rotating spindle assembly 100 and the end fixing assembly 200 caused by the rotation of the turntable. Since the entire deformation process is a natural bending, the pipe is only subjected to a simple bending moment, effectively avoiding the S-shaped twisting, stretching, and high-frequency fatigue wear found in traditional cable carriers or torsion structures. By adopting the above scheme, functional decoupling is achieved by dividing the motion trajectory into tension transmission of the first pipe section 801 and pure bending deformation of the second pipe section 802. The first pipe section 801 only transmits tangential force, while the second pipe section 802 is subjected to pure bending moment and undergoes bending deformation. This motion logic of the first pipe section 801 remaining tensioned and the second pipe section 802 bending naturally reduces the stress mode of the water pipe from composite torsional tension to uniaxial pure bending moment. The fatigue life under pure bending moment is much greater than that under torsion, thereby significantly extending the actual service life of the water pipe.

[0050] In this embodiment, the end fixing assembly 200 includes a water channel fixing bracket 201 and a through-plate connector fixing plate 202. The through-plate connector fixing plate 202 is sleeved on the vertical shaft portion 2011 of the water channel fixing bracket 201, and the upper and lower ends of the through-plate connector fixing plate 202 are respectively axially limited and fixed to the vertical shaft portion 2011 by limiting members, so that the through-plate connector fixing plate 202 can rotate freely in the horizontal plane with the vertical shaft portion 2011 as the axis, while being locked in the vertical direction. In order to lock the pipe posture after the pipe is laid, the vertical shaft portion 2011 of the water channel fixing bracket 201 is provided with a plurality of adjusting screw holes distributed along the axial direction, and the through-plate connector fixing plate 202 is provided with fasteners. The fasteners pass through the through-plate connector fixing plate 202 and are selectively locked in any one of the adjusting screw holes, so as to restrict the through-plate connector fixing plate 202 within a specific rotation angle range. Specifically, during actual assembly, the operator can first allow the through-plate connector fixing plate 202 to rotate freely to straighten the pipeline posture, and then insert the fastening screws, selectively tightening the fastener into any one of the adjusting screw holes. This locks the through-plate connector fixing plate 202 within a specific rotation angle range, preventing directional deviation caused by vibration during equipment operation. Using this method, the through-plate connector fixing plate 202 can rotate freely around its vertical axis, allowing the operator to rotate it freely during the pipe laying stage to naturally straighten the pipeline direction. Then, by adjusting the screw holes and fasteners, the posture is completely locked. This not only avoids initial pipe breakage due to forced assembly, but also effectively prevents joint directional drift caused by long-term equipment vibration after locking, ensuring the long-term stable posture of the pipeline system.

[0051] In this embodiment, the rotating spindle assembly 100 is provided with a turntable water sleeve 103. The input end of the turntable water sleeve 103 is fixedly connected to the mold wall water drain 11 on the turntable mold wall 10. The bottom end of the turntable water sleeve 103 is embedded in the turntable shaft sleeve 101 of the rotating spindle assembly 100 and connects with the internal channel of the turntable shaft sleeve 101. After the flow channel 800 is led out from the mold wall water drain 11, it first passes through the corresponding channel in the turntable water sleeve 103 and then enters the interior of the turntable shaft sleeve 101. The pipeline between the mold wall water drain 11 and the turntable water sleeve 103 remains stationary relative to the turntable water sleeve 103, so there is basically no wear in this section. In this embodiment, the turntable water jacket 103 is a stepped cylindrical structure. Its top opening connects to the mold wall water drain 11 at the bottom of the turntable mold wall 10, and its bottom end is nested and embedded inside the turntable shaft sleeve 101 of the rotating spindle assembly 100. After being sealed by a sealing ring, it communicates one-to-one with each axial channel inside the turntable shaft sleeve 101. Using this scheme, the bottom end of the turntable water jacket 103 is embedded in the turntable shaft sleeve 101 and sealed, forming a highly integrated rotating body. Furthermore, the pipeline between the mold wall water drain 11 and the turntable water jacket 103 is explicitly defined to remain stationary, meaning that this part of the pipeline does not undergo any relative movement during turntable rotation, remaining in a zero-wear state. All relative displacement is concentrated in the far-end compensation mechanism, greatly reducing the wear points of the entire system. In this embodiment, the rotating spindle assembly 100 has multiple independent axial channels inside, and the flow channel 800 includes multiple independent flow channel branches; the rotating shaft cover plate 102 has several through holes, and each flow channel branch passes through the corresponding through hole from the inside of the rotating spindle assembly 100 to the large rocker arm assembly 300; the large rocker arm assembly 300 and the small rocker arm assembly 400 are both located on the horizontal side of the rotating spindle assembly 100, and the rotation axis 301 lines of the large rocker arm assembly 300 and the small rocker arm assembly 400 are parallel to the horizontal rotation axis 301 line of the rotating spindle assembly 100. The swing trajectory of the large rocker arm assembly 300 and the small rocker arm assembly 400 in the horizontal plane is coplanar with the rotation plane of the turntable mold wall 10, resulting in an extremely compact structure and neat wiring. The working fluid flow path of this invention is as follows: water (or oil) exits from the external mold temperature device 30 at the client end, enters the platen connector of the end fixing assembly 200, passes through the second pipe section 802, passes through the first pipe section 801, enters the axial channel of the turntable sleeve 101, passes through the corresponding flow channel in the turntable water jacket 103, flows out from the mold wall water drain 11, enters various areas of the mold for heat exchange, flows back from the water drain on the other side of the mold, and returns to the external mold temperature device 30 via the above path. During this process, the short connecting water pipe between the mold wall water drain 11 and the turntable water jacket 103 is fixed on the rotating body, and there is no relative displacement between the two during operation, so there is basically no risk of wear.Only a section of water pipe (including the first pipe section 801 and the second pipe section 802) between the turntable sleeve 101 and the end fixing member has relative displacement, and low-stress bending compensation is achieved precisely through the pipe follow-up compensation mechanism of the present invention.

[0052] In this embodiment, a multi-zone temperature control system is also included to achieve precise temperature control in different areas of the mold during multi-component injection molding. The multi-zone temperature control system includes a temperature and flow sensing unit 20, which is installed on the inlet and outlet water pipelines of each independent temperature control zone of the mold to collect the temperature and flow signals of the fluid medium. An external mold temperature device 30 is connected to the rotary table pipeline structure and is used to heat or cool the fluid medium entering the mold. The main controller 40 of the injection molding machine is equipped with a centralized HMI human-machine interface and is connected to the external mold temperature device 30 via a communication bus; The temperature and flow sensing unit 20 feeds back the collected signals to the injection molding machine main controller 40. The injection molding machine main controller 40 displays the sensing data of each temperature control zone in real time on the centralized HMI human-machine interface, and sends temperature adjustment commands for each temperature control zone to the external mold temperature device 30 through the communication bus according to the pre-stored process parameters. The external mold temperature device 30 responds to the commands and adjusts the temperature of the output fluid medium, thereby completing the real-time and precise control of the temperature of each zone of the multi-component injection molding machine mold in a closed loop.

[0053] Specifically, temperature and flow sensing units 20 are installed on the connecting pipes between the mold wall water drains 11 and the turntable water jacket 103 on both sides of the turntable mold wall 10, i.e., on the stationary side of the pipe follow-up compensation mechanism. This installation position ensures that the sensors are not disturbed by the follow-up displacement during the rotation of the turntable mold wall 10, guaranteeing the stability of signal acquisition. The temperature and flow sensing units 20 are used to collect the temperature and flow rate of the fluid medium entering each independent temperature control zone of the mold. The external mold temperature device 30 is equipped with multiple independent temperature control channels, which are connected to each temperature control zone of the mold through the aforementioned turntable pipe structure, and are used to heat or cool the fluid medium entering the mold. During operation, the sensing units located on the mold side transmit the real-time temperature and flow signals to the injection molding machine main controller 40. The injection molding machine main controller 40 displays the real-time curves and values ​​of each temperature control zone on a centralized HMI interface. Operators only need to set the target temperature and allowable temperature difference threshold for different mold zones on the main control interface of the injection molding machine. The main controller 40 of the injection molding machine will then calculate the deviation value in real time based on the pre-stored process parameters and send temperature adjustment commands, such as turning on the heating element or increasing the opening of the cooling water valve, to the external mold temperature device 30 via the communication bus. After responding to the commands, the external mold temperature device 30 independently adjusts the output fluid temperature of each channel, thus forming a complete closed-loop control. With this integrated approach, the injection molding machine operator no longer needs to leave the main control position to adjust the panel of the external mold temperature device 30, and the front-mounted temperature and flow sensing unit 20 greatly shortens the temperature feedback lag time, improving the yield rate of multi-component injection molding.

[0054] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotary table piping structure for a multi-component horizontal through-jet injection molding machine, characterized in that: include A rotating spindle assembly (100) is used to be fixedly connected to the turntable mold wall (10) of the injection molding machine and to rotate around the horizontal axis with the turntable mold wall (10) from 0 to 180°. An end-mounted fixing assembly (200) is mounted on the injection molding machine frame as a fixing interface for external pipe connections; and A pipeline follow-up compensation mechanism is disposed between the rotating spindle assembly (100) and the end fixing assembly (200); The pipeline follow-up compensation mechanism includes a large rocker arm assembly (300) and a small rocker arm assembly (400). One end of the large rocker arm assembly (300) is rotatably engaged with the rotating spindle assembly (100) via a rotating shaft (301), and the large rocker arm assembly (300) has a first rotation limit relative to the rotating spindle assembly (100); The small rocker arm assembly (400) is connected to the other end of the large rocker arm assembly (300) and can rotate freely about this end relative to the large rocker arm assembly (300); the small rocker arm assembly (400) is provided with an anti-reverse positioning limit mechanism (500) for limiting the small rocker arm assembly (400) from retracting towards the rotating spindle assembly (100). The flow channel (800) leading out from the turntable mold wall (10) passes through the interior of the rotating spindle assembly (100), then passes through the large rocker arm assembly (300) and the small rocker arm assembly (400) in sequence, and finally connects to the end fixing assembly (200).

2. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 1, characterized in that: The rotating spindle assembly (100) includes a turntable shaft sleeve (101) and a rotating shaft cover plate (102). The large rocker arm assembly (300) passes through the turntable shaft sleeve (101) via a rotating shaft (301). The turntable shaft sleeve (101) is provided with an arc-shaped groove (1011), and the rotating shaft cover plate (102) is provided with a limiting block (1021) extending into the arc-shaped groove (1011). The arc-shaped groove (1011) cooperates with the limiting block (1021) to limit the rotation angle of the large rocker arm assembly (300) relative to the turntable shaft sleeve (101) to 90°.

3. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 2, characterized in that: The large rocker arm assembly (300) includes a large rocker arm (302) and a rotating shaft (301). One end of the rotating shaft (301) is rigidly connected to the large rocker arm (302), and the other end of the rotating shaft (301) passes through the turntable shaft sleeve (101) and is rigidly connected to the rotating shaft cover plate (102). A first wear-resistant component (600) is provided between the turntable shaft sleeve (101) and the rotating shaft (301), and the outer peripheral wall of the rotating shaft (301) is rotatably engaged with the first wear-resistant component (600).

4. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 1, characterized in that: The small rocker arm assembly (400) includes a small rocker shaft (401), which is vertically inserted through one end of the large rocker arm assembly (300) away from the rotation axis (301). A second wear-resistant component (700) is provided between the small rocker shaft (401) and the large rocker arm assembly (300), so that the small rocker arm assembly (400) has circumferential free rotation relative to the large rocker arm assembly (300). The anti-reverse positioning limiting mechanism (500) includes components disposed on the large rocker arm assembly (300). The rocker arm assembly (300) has an anti-overrun groove (501) on its side, and a fine-tuning shaft (502) is provided on the small rocker arm assembly (400) and extends into the anti-overrun groove (501); when the small rocker arm assembly (400) rotates counterclockwise and approaches the rotating spindle assembly (100), the fine-tuning shaft (502) interferes with the groove wall of the anti-overrun groove (501), thereby restricting the small rocker arm assembly (400) from rotating counterclockwise past the large rocker arm assembly (300).

5. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 4, characterized in that: The anti-reverse positioning limiting mechanism (500) also includes two axial pressure plates (503), which are respectively disposed on the upper and lower sides of the small rocker arm assembly (400) and rigidly fixedly connected to the small rocker arm assembly (400); the fine adjustment shaft (502) is fastened between the two axial pressure plates (503); the fine adjustment shaft (502) passes through the upper and lower axial pressure plates (503) in sequence, and the lower end of the fine adjustment shaft (502) passes through the axial pressure plate (503) near the large rocker arm assembly (300) and extends into the anti-overlap groove (501).

6. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 1, characterized in that: The flow channel (800) includes a first pipe section (801) connecting the rotary spindle assembly (100) and the small rocker arm assembly (400), and a second pipe section (802) connecting the small rocker arm assembly (400) and the end fixing assembly (200); when the turntable mold wall (10) is in the initial 0° position, the second pipe section (802) is pre-configured in an initial shape that is slightly bent toward the center of the injection molding machine; when the turntable mold wall (10) rotates from 0° to 1°... During the 80° process, the first pipeline section (801) always maintains a straight tension state and transmits tangential thrust to drive the small rocker arm assembly (400). The second pipeline section (802) is subjected to the tangential thrust of the small rocker arm assembly (400) and the fixed constraint of the end fixing assembly (200), and generates continuous bending deformation from the initial shape towards the center of the injection molding machine to compensate for the change in the distance between the rotating spindle assembly (100) and the end fixing assembly (200).

7. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 1, characterized in that: The end fixing assembly (200) includes a water channel fixing bracket (201) and a through-plate connector fixing plate (202). The through-plate connector fixing plate (202) is sleeved on the vertical shaft portion (2011) of the water channel fixing bracket (201), and the upper and lower ends of the through-plate connector fixing plate (202) are respectively axially limited and fixed to the vertical shaft portion (2011) by limiting members, so that the through-plate connector fixing plate (202) can rotate freely in the horizontal plane with the vertical shaft portion (2011) as the axis. The vertical shaft portion (2011) of the water channel fixing bracket (201) is provided with a plurality of adjusting screw holes distributed along the axial direction. The through-plate connector fixing plate (202) is provided with fasteners, which pass through the through-plate connector fixing plate (202) and selectively lock into any one of the adjusting screw holes, so as to limit the through-plate connector fixing plate (202) within a specific rotation angle range.

8. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 1, characterized in that: The rotating spindle assembly (100) is provided with a turntable water sleeve (103). The input end of the turntable water sleeve (103) is fixedly connected to the mold wall water drain (11) on the turntable mold wall (10). The bottom end of the turntable water sleeve (103) is embedded in the turntable shaft sleeve (101) of the rotating spindle assembly (100) and connects with the internal channel of the turntable shaft sleeve (101). After the flow channel (800) is led out from the mold wall water drain (11), it first passes through the corresponding channel in the turntable water sleeve (103) and then enters the interior of the turntable shaft sleeve (101). The pipeline between the mold wall water drain (11) and the turntable water sleeve (103) remains stationary relative to the turntable water sleeve (103), so there is basically no wear in this section.

9. The rotary table piping structure of the multi-component horizontal through-jet injection molding machine according to claim 2, characterized in that: The rotating spindle assembly (100) has multiple independent axial channels inside, and the flow channel pipeline (800) includes multiple independent flow channel branches; the rotating shaft cover plate (102) has several through holes, and each flow channel branch passes through the corresponding through hole from the inside of the rotating spindle assembly (100) to the large rocker arm assembly (300); the large rocker arm assembly (300) and the small rocker arm assembly (400) are both located on the horizontal side of the rotating spindle assembly (100), and the rotation axis (301) lines of the large rocker arm assembly (300) and the small rocker arm assembly (400) are parallel to the horizontal rotation axis (301) line of the rotating spindle assembly (100). The swing trajectory of the large rocker arm assembly (300) and the small rocker arm assembly (400) in the horizontal plane is coplanar with the rotation plane of the turntable mold wall (10).

10. The rotary table piping structure of the multi-component horizontal through-shot injection molding machine according to any one of claims 1-9, characterized in that: It also includes a multi-zone temperature control system; The multi-zone temperature control system includes: Temperature and flow sensing unit (20) is installed on the inlet and outlet water pipelines of each independent temperature control area of ​​the mold to collect temperature and flow signals of the fluid medium. An external mold temperature device (30) is connected to the rotary table pipeline structure and is used to heat or cool the fluid medium entering the mold. The main controller (40) of the injection molding machine is equipped with a centralized HMI human-machine interface and is connected to the external mold temperature device (30) via a communication bus; The temperature and flow sensing unit (20) feeds back the collected signal to the injection molding machine main controller (40). The injection molding machine main controller (40) displays the sensing data of each temperature control area in real time on the centralized HMI human-machine interface, and sends temperature adjustment commands for each temperature control area to the external mold temperature device (30) through the communication bus according to the pre-stored process parameters.

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