A flow control valve used to control the flow of molten material from the gate into the mold cavity

Abstract

The present invention provides a flow control valve for controlling the molten material flowing out of the gate into the mold cavity, belonging to the field of injection molding control technology. It includes a valve body, a flow channel arranged along a first axis is provided on the valve body, a valve core movable hole arranged along a second axis and the inner end of which is connected to the flow channel is also provided on the valve body, a valve core that can move along the second axis to change the width of the flow channel is provided in the valve core movable hole, and a driving mechanism for driving the valve core to move along the second axis is included, the driving mechanism includes a rotating member, a pivoting structure that can be pivotally connected to the mold assembly is provided on the rotating member, and the pivoting structure is located at the rotation center of the rotating member, and a pushing connection structure that can push the valve core to move along the second axis when the rotating member rotates is provided between the rotating member deviating from the rotation center and the valve core, and the rotating member is connected to a self-rotating driving assembly that can drive the rotating member to rotate. The valve needle provided in the flow channel is eliminated, which can effectively avoid excessive pressure and flow interference.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding control, and relates to a flow control valve used for controlling molten material flowing out of a gate to flow into a mold cavity. Background Art

[0002] In order to ensure product quality and production efficiency during injection molding, the flow rate of molten material needs to be accurately controlled. In the prior art, the flow rate of molten material from the nozzle to the mold cavity is mostly controlled by a valve needle that can move back and forth linearly. However, the presence and alternating movement of the valve needle increases flow interference, resulting in accumulation and stagnation areas of material, causing, for example, discoloration of the injected material, requiring multiple cleaning injections, thereby wasting a lot of material. For example, the valve needle in EP520345 has the defect of pushing the material against the inner surface of the channel, thereby further compressing it to the outlet. This squeezing effect leads to defects in the final product. Summary of the invention

[0003] The object of the present invention is to solve the above problems and provide a flow control valve for controlling the molten material flowing out of the gate into the mold cavity.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A flow control valve for controlling molten material flowing out of a gate into a mold cavity, comprising a valve body, the valve body being provided with a flow channel arranged along a first axis, the valve body being further provided with a valve core movable hole arranged along a second axis and the inner end of which is connected to the flow channel, the valve core movable hole being provided with a valve core capable of moving along the second axis to change the width of the flow channel, comprising a driving mechanism for driving the valve core to move along the second axis, the driving mechanism comprising a rotating member, the rotating member being provided with a pivot structure capable of pivotally connecting to a mold assembly, and the pivot structure being located at the rotation center of the rotating member, a pushing connection structure capable of pushing the valve core to move along the second axis when the rotating member rotates being provided between the rotating member deviating from the rotation center and the valve core, the rotating member being connected to a self-rotating driving assembly capable of driving the rotating member to rotate.

[0005] The valve needle arranged in the flow channel is eliminated, and the width of the flow channel is changed by the axial displacement of the valve core, which can accurately adjust the flow rate of the molten material and effectively avoid excessive pressure and flow interference. The valve core has a compact structure and occupies a small space in the valve body. The flow rate of the molten material can be adjusted by the rotation of the rotating part, which simplifies the motion chain and can effectively increase the stroke of the valve core axial displacement, which is beneficial to the overall compactness of the valve body.

[0006] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the push connection structure includes a groove arranged on the valve core, and the rotating member is provided with a push head capable of cooperating with the groove; Alternatively, the push connection structure includes a pin shaft arranged on the valve core, and the rotating member is provided with a pin hole capable of cooperating with the pin shaft.

[0007] When the self-rotating driving component drives the rotating member to rotate, it can push the valve core to move along the second axis to change the width of the flow channel, thereby adjusting the flow rate of the molten material.

[0008] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the pivot structure includes a pivot shaft or a pivot hole arranged on the rotating part, and the mold assembly is provided with an axis hole or an axis pin that can correspond to the pivot shaft or the pivot hole.

[0009] The pivot shaft or pivot hole on the rotating member matches with the shaft hole or shaft pin on the mold assembly, and the self-rotation driving assembly can drive the rotating member to rotate around the rotation center of the pivot shaft or the pivot hole.

[0010] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the outer end of the groove is provided with a yield expansion opening, the push head is arranged in the groove, and a yield gap is provided between the groove and the inner end of the push head.

[0011] The venting expansion and the venting clearance play a venting role, which can facilitate the push head to enter and exit the groove. During the rotation of the rotating part, the push head enters and exits the groove and always applies axial force to the valve core through the groove, which can ensure that the flow control rod always makes axial movement during the rotation of the rotating part.

[0012] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the self-rotation drive assembly includes a rotating ring and a rotating ring drive unit, a sliding rod is provided at a position of the rotating member deviating from the rotation center, the rotating ring is provided with a non-radially arranged strip groove, and the sliding rod is arranged in the strip groove; Alternatively, the self-rotation drive assembly includes a rotating ring and a rotating ring driving unit, a strip groove is provided at a position of the rotating member deviating from the rotation center, and a sliding rod is provided on the rotating ring, and the sliding rod is arranged in the strip groove.

[0013] The rotating member and the rotating ring are connected through the cooperation of the sliding rod and the strip groove.

[0014] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the rotating member is a lever or a geometric plate.

[0015] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the lever is an L-shaped lever, and the pivot structure is provided between the two ends of the lever. A pushing connection structure is provided between one end of the lever and the valve core, which can push the valve core to move along the second axis when the lever rotates, and the other end of the lever is connected to a self-rotating drive component that can drive the rotating part to rotate.

[0016] By driving the lever to rotate, the valve core can be pushed to move along the second axis to change the width of the flow channel, thereby adjusting the flow of the molten material. The operation is convenient, the flow adjustment is accurate and fast, the motion chain is simplified and the stroke of the valve core shaft can be effectively increased. The lever and the valve core have a compact structure and occupy a small space in the valve body, which is conducive to the compactness of the valve body as a whole.

[0017] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the valve core includes a flow control rod, the inner end of the flow control rod is arranged in the movable hole of the valve core and can extend into the flow channel to control the flow rate, the outer end of the flow control rod is arranged in the movable cavity of the mold assembly, and the driving mechanism is also arranged in the active cavity.

[0018] The driving mechanism can drive the flow control rod to move along the second axis to change the width of the flow channel, and can accurately adjust the flow rate of the molten material.

[0019] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, the diameter of the flow control rod matches the diameter of the flow channel, and the inner end of the flow control rod is adapted to the inner wall of the flow channel; Alternatively, the diameter of the flow control rod matches the aperture of the flow channel, and a clearance hole is provided on the inner wall of the flow channel on the side opposite to the movable hole of the valve core, through which the flow control rod can enter after passing through the flow channel.

[0020] The flow control rod can completely close the flow channel so that the molten material cannot flow into the mold cavity, which can improve the accuracy of molten material flow control.

[0021] In the above-mentioned flow control valve for controlling the molten material flowing out of the gate into the mold cavity, a plurality of flow control rods are distributed circumferentially along the second axis, and the number of flow control rods is ≥2. The inner ends of the plurality of flow control rods can fit together after abutting against each other to close the flow channel.

[0022] The driving mechanism drives the flow control rod to move along the second axis to change the width of the flow channel, thereby adjusting the flow rate of the molten material. When the inner ends of the flow control rods abut against each other, they can fit together to close the flow channel, thereby achieving precise control of the flow rate of the molten material.

[0023] Compared with the existing technology, the advantages of the present invention are: 1. The valve needle set in the flow channel is eliminated, and the width of the flow channel is changed by the axial displacement of the valve core, which can accurately adjust the flow of the molten material and effectively avoid excessive pressure and flow interference. 2. The valve core has a compact structure and occupies a small space in the valve body. The valve core can be driven to move the axis to adjust the flow of the molten material by the rotation of the rotating part, which simplifies the motion chain and can effectively increase the stroke of the valve core axis displacement, which is conducive to the compactness of the valve body as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure provided by the present invention; Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle; Figure 3 It is a structural schematic diagram of the driving mechanism; Figure 4 is an exploded schematic diagram of the drive mechanism; Figure 5 is a schematic diagram of the structure of the groove; Figure 6 It is a schematic diagram of the structure of the rotating part; Figure 7 It is a schematic diagram of the overall structure provided in the second embodiment; Figure 8 yes Figure 7 The enlarged schematic diagram of point B in the middle; Fig. 9 It is a schematic diagram of the distribution of several flow control rods in the second embodiment.

[0025] In the figure, valve body 1, first axis 2, flow channel 3, second axis 4, valve core movable hole 5, valve core 6, driving mechanism 7, rotating member 8, mold assembly 9, pivot structure 10, push connection structure 11, self-rotation driving assembly 12, groove 13, push head 14, pivot shaft 15, make way expansion 16, make way gap 17, rotating ring 18, rotating ring driving unit 19, sliding rod 20, strip groove 21, lever 22, flow control rod 23, movable cavity 24, rack 25, tooth body 26, make way hole 27, first channel 28, syringe 29, template 30. DETAILED DESCRIPTION

[0026] Embodiment 1 like Figure 1-Figure 6As shown, a flow control valve for controlling the molten material flowing out of the gate into the mold cavity comprises a valve body 1, a flow channel 3 arranged along a first axis 2 is provided on the valve body 1, a valve core movable hole 5 arranged along a second axis 4 and the inner end of which is connected to the flow channel 3 is also provided on the valve body 1, a valve core 6 which can move along the second axis 4 to change the width of the flow channel 3 is provided in the valve core movable hole 5, and a driving mechanism 7 for driving the valve core 6 to move along the second axis 4 is included, the driving mechanism 7 comprises a rotating member 8, a pivot structure 10 which can be pivotally connected to a mold assembly 9 is provided on the rotating member 8, and the pivot structure 10 is located at the rotation center of the rotating member 8, a pushing connection structure 11 which can push the valve core 6 to move along the second axis 4 when the rotating member 8 rotates is provided between the rotating member 8 deviating from the rotation center and the valve core 6, and the rotating member 8 is connected to a self-rotating driving assembly 12 which can drive the rotating member 8 to rotate.

[0027] In the present invention, the molten material flows into the flow channel 3 through a syringe 29 having a first channel 28. The axes of the first channel 28 and the flow channel 3 are consistent with the first axis 2. The first axis 2 is the polar symmetry axis of the first channel 28. In this embodiment, the first axis 2 is the Y axis, and the second axis 4 is the Z axis. The syringe 29 is arranged inside one or more templates 30 constituting the mold assembly 9, and is connected to a manifold for distributing the molten material. The manifold is also installed inside the template 30, which is not shown in the drawings of this specification. The end of the syringe 29 is placed on the valve body 1, and the valve body 1 is provided with an orifice adapted to the end of the syringe 29, and the orifice has the flow channel 3.

[0028] The molten material flows into the mold cavity through the flow channel 3, and the self-rotation drive component 12 can drive the rotating member 8 to rotate. When the rotating member 8 rotates, the connecting structure 11 can push the valve core 6 to move along the second axis 4 in the valve core movable hole 5 to change the channel width of the flow channel 3, thereby adjusting the flow rate of the molten material.

[0029] The present invention eliminates the valve needle disposed in the flow channel 3 and changes the channel width of the flow channel 3 by axial displacement of the valve core 6, thereby being able to accurately adjust the flow of the molten material and effectively avoid causing excessive pressure and flow disturbance.

[0030] The valve core 6 has a compact structure and occupies a small space in the valve body 1. The valve core 6 can be pushed to move axially by rotating the rotating member 8 to adjust the flow of the molten material, which simplifies the motion chain and can effectively increase the axial displacement of the valve core 6, which is beneficial to the overall compactness of the valve body 1.

[0031] Specifically, combined with Figure 3-Figure 6 As shown, the push connection structure 11 includes a groove 13 arranged on the valve core 6, and the rotating member 8 is provided with a push head 14 that can cooperate with the groove 13.

[0032] When the self-rotating driving component 12 drives the rotating member 8 to rotate, it can push the valve core 6 to move along the second axis 4 to change the channel width of the flow channel 3, thereby adjusting the flow rate of the molten material.

[0033] Specifically, combined with Figure 3 , Figure 4 and Figure 6 As shown, the pivot structure 10 includes a pivot shaft 15 or a pivot hole arranged on the rotating member 8, and the mold assembly 9 is provided with an axis hole or an axis pin that can correspond to the pivot shaft 15 or the pivot hole.

[0034] In this embodiment, the pivot structure 10 is a pivot shaft 15 disposed on the rotating member 8 , and the mold assembly 9 is provided with an axial hole capable of correspondingly matching with the pivot shaft 15 .

[0035] The pivot shaft 15 on the rotating member 8 corresponds to the shaft hole on the mold assembly 9 , and the self-rotation driving assembly 12 can drive the rotating member 8 to rotate around the rotation center of the pivot shaft 15 .

[0036] In this embodiment, the rotation center of the pivot shaft 15 is the W axis.

[0037] Specifically, combined with Figure 5 As shown, a flared opening 16 is provided at the outer end of the groove 13 , the push head 14 is arranged in the groove 13 , and a flared opening 17 is provided between the groove 13 and the inner end of the push head 14 .

[0038] The venting expansion 16 and the venting gap 17 play a venting role, which can facilitate the push head 14 to enter and exit the groove 13.

[0039] The groove 13 is arranged on the outer end side of the valve core 6, that is, the flow control rod 23. During the process of the rotating member 8 rotating and pushing the valve core 6 to move along the second axis 4, the push head 14 is always in contact with the groove 13, and there is a clearance gap 17 between the inner end of the groove 13 and the inner end of the push head 14. The setting of the clearance gap 17 facilitates the push head 14 to enter and exit the groove 13. During the rotation of the rotating member 8, the push head 14 enters and exits the groove 13 and always applies an axial force to the valve core 6 through the groove 13, which can ensure that the flow control rod 23 always makes axial movement during the rotation of the rotating member 8.

[0040] Specifically, combined with Figure 1-Figure 4 As shown, the self-rotation driving assembly 12 includes a rotating ring 18 and a rotating ring driving unit 19 . A sliding rod 20 is provided at a position of the rotating member 8 that deviates from the rotation center. A non-radially arranged strip groove 21 is provided on the rotating ring 18 , and the sliding rod 20 is arranged in the strip groove 21 .

[0041] The rotating member 8 is connected to the rotating ring 18 through the cooperation of the sliding rod 20 and the strip groove 21. The rotation center of the rotating ring 18 is the Y2 axis.

[0042] Preferably, the Y2 axis is parallel to or coincides with the Y axis. In this embodiment, the Y2 axis coincides with the Y axis.

[0043] Specifically, combined with Figure 3 and Figure 4 As shown, the rotating member 8 is a lever 22 or a geometric plate.

[0044] In this embodiment, the rotating member 8 is a lever 22 .

[0045] Specifically, combined with Figure 3 and Figure 4 As shown, the lever 22 is an L-shaped lever 22, and a pivot structure 10 is provided between the two ends of the lever 22. A pushing connection structure 11 is provided between one end of the lever 22 and the valve core 6, which can push the valve core 6 to move along the second axis 4 when the lever 22 rotates. The other end of the lever 22 is connected to a self-rotating drive component 12 that can drive the rotating member 8 to rotate.

[0046] By driving the lever 22 to rotate, the valve core 6 can be pushed to move along the second axis 4 to change the width of the channel 3, thereby adjusting the flow of the molten material. The operation is convenient, the flow adjustment is accurate and fast, the motion chain is simplified and the axial displacement of the valve core 6 can be effectively increased. The lever 22 and the valve core 6 have a compact structure and occupy a small space in the valve body 1, which is conducive to the overall compactness of the valve body 1.

[0047] Specifically, combined with Figure 1-Figure 4 As shown, the valve core 6 includes a flow control rod 23, the inner end of the flow control rod 23 is arranged in the valve core active hole 5 and can extend into the flow channel 3 to control the flow, and the outer end of the flow control rod 23 is arranged in the active cavity 24 of the mold assembly 9, and a driving mechanism 7 is also provided in the active cavity 24.

[0048] The second axis 4 is perpendicular to the first axis 2; or, the second axis 4 intersects the first axis 2 at a point.

[0049] In this embodiment, preferably, the second axis 4 is perpendicular to the first axis 2 .

[0050] The driving mechanism 7 can drive the flow control rod 23 to move along the second axis 4 to change the channel width of the flow channel 3, and can accurately adjust the flow rate of the molten material.

[0051] Specifically, combined with Figure 1-Figure 4 As shown, the diameter of the flow control rod 23 matches the aperture of the flow channel 3 , and a clearance hole 27 is provided on the inner wall of the flow channel 3 on the side opposite to the valve core movable hole 5 , through which the flow control rod 23 can pass through the flow channel 3 and enter.

[0052] After passing through the flow channel 3 , the flow control rod 23 enters the clearance hole 27 on the inner wall of the flow channel 3 , which can completely close the flow channel 3 so that the molten material cannot flow into the mold cavity, thereby improving the accuracy of the molten material flow control.

[0053] Specifically, combined with Figure 3 and Figure 4 As shown, the rotating ring driving unit 19 includes a rack 25 and a gear body 26 , and the gear body 26 is disposed on the side of the rotating ring 18 .

[0054] The driver can drive the rack 25 to move back and forth along the axial direction of the rack 25 to drive the rotating ring 18 to rotate around the rotation center Y2 axis, thereby causing the lever 22 to rotate around the rotation center W axis of the pivot shaft 15 to push the flow control rod 23 to move axially for flow control.

[0055] The rack 25 is arranged axially along the W2 axis. The drive is driven by a pneumatic, hydraulic or electric actuator.

[0056] Alternatively, the tooth body 26 is meshedly connected with a driving tooth or a driving worm driven by a motor.

[0057] Preferably, the W3 axis is orthogonal to the plane passing through the Y2 axis.

[0058] The working principle of the present invention is as follows: the driver drives the rack 25 to move axially along the W2 axis, and the meshing transmission between the rack 25 and the tooth body 26 can drive the rotating ring 18 to rotate around the rotation center Y2 axis, thereby causing the lever 22 to rotate around the rotation center W axis of the pivot shaft 15. During the rotation of the lever 22 around the pivot shaft 15, the push head 14 enters and exits the groove 13 and always applies an axial force to the valve core 6 through the groove 13, so as to ensure that the flow control rod 23 always moves axially in the valve core movable hole 5 during the rotation of the lever 22; The flow control rod 23 moves along the second axis 4 in the valve core movable hole 5 to change the width of the channel 3, thereby accurately adjusting the flow rate of the molten material; after the flow control rod 23 passes through the channel 3, it enters the makeshift hole 27 on the inner wall of the channel 3, which can completely close the channel 3 so that the molten material cannot flow into the mold cavity.

[0059] Embodiment 2 like Figure 7-Figure 9 As shown, the structure and working principle of this embodiment are basically the same as those of the first embodiment, except that a plurality of flow control rods 23 are distributed circumferentially along the second axis 4, and the number of flow control rods 23 ≥ 2, and the inner ends of the plurality of flow control rods 23 can fit together after abutting against each other, so as to close the flow channel 3.

[0060] The driving mechanism 7 drives the flow control rod 23 to move along the second axis 4 to change the width of the flow channel 3, thereby adjusting the flow rate of the molten material. When the inner ends of the flow control rods 23 abut against each other, they can fit together to close the flow channel 3 and achieve precise control of the flow rate of the molten material.

[0061] Embodiment 3 The structure and working principle of this embodiment are substantially the same as those of the first embodiment, except that the push connection structure 11 includes a pin shaft arranged on the valve core 6, and the rotating member 8 is provided with a pin hole capable of cooperating with the pin shaft.

[0062] Embodiment 4 The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that the self-rotation drive assembly 12 includes a rotating ring 18 and a rotating ring drive unit 19, a strip groove 21 is provided at a position where the rotating member 8 deviates from the rotation center, and a sliding rod 20 is provided on the rotating ring 18, and the sliding rod 20 is arranged in the strip groove 21.

[0063] Embodiment 5 The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that the diameter of the flow control rod 23 matches the aperture of the flow channel 3 , and the inner end of the flow control rod 23 is adapted to the inner wall of the flow channel 3 .

[0064] The inner end of the flow control rod 23 is adapted to the inner wall of the flow channel 3, so that the flow control rod 23 can completely close the flow channel 3 to prevent the molten material from flowing into the mold cavity, thereby improving the accuracy of the molten material flow control.

[0065] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0066] Although this article uses the valve body 1, the first axis 2, the flow channel 3, the second axis 4, the valve core movable hole 5, the valve core 6, the driving mechanism 7, the rotating part 8, the mold assembly 9, the pivot structure 10, the push connection structure 11, the self-rotation drive assembly 12, the groove 13, the push head 14, the pivot shaft 15, the venting expansion 16, the venting gap 17, the rotating ring 18, the rotating ring drive unit 19, the sliding rod 20, the strip groove 21, the lever 22, the flow control rod 23, the movable cavity 24, the rack 25, the tooth body 26, the venting hole 27, the first channel 28, the syringe 29, the template 30, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A flow control valve for controlling molten material flowing out of a gate into a mold cavity, comprising a valve body (1), the valve body (1) being provided with a flow channel (3) arranged along a first axis (2), the valve body (1) being further provided with a valve core movable hole (5) arranged along a second axis (4) and the inner end of which is connected to the flow channel (3), the valve core movable hole (5) being provided with a valve core (6) which can move along the second axis (4) to change the width of the flow channel (3), and characterized in that: The invention comprises a driving mechanism (7) for driving a valve core (6) to move along a second axis (4), wherein the driving mechanism (7) comprises a rotating member (8), on which a pivot structure (10) capable of being pivotally connected to a mold assembly (9) is provided, and the pivot structure (10) is located at the rotation center of the rotating member (8), and a pushing connection structure (11) capable of pushing the valve core (6) to move along the second axis (4) when the rotating member (8) rotates is provided between the rotating member (8) and the valve core (6) at a position offset from the rotation center, and wherein the pushing connection structure (11) is capable of pushing the valve core (6) to move along the second axis (4) when the rotating member (8) rotates, and the rotating member (8) is connected to a self-rotating driving assembly (12) capable of driving the rotating member (8) to rotate.

2. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 1, characterized in that: The push connection structure (11) comprises a groove (13) provided on the valve core (6), and the rotating member (8) is provided with a push head (14) capable of cooperating with the groove (13); Alternatively, the push connection structure (11) comprises a pin shaft arranged on the valve core (6), and the rotating member (8) is provided with a pin hole capable of cooperating with the pin shaft.

3. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 1, characterized in that: The pivot structure (10) comprises a pivot shaft (15) or a pivot hole arranged on the rotating member (8), and the mold assembly (9) is provided with an axis hole or an axis pin capable of correspondingly matching with the pivot shaft (15) or the pivot hole.

4. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 2, characterized in that: The outer end of the groove (13) is provided with a clearance expansion opening (16), the push head (14) is arranged in the groove (13), and a clearance gap (17) is provided between the groove (13) and the inner end of the push head (14).

5. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 1, 2, 3 or 4, characterized in that: The self-rotation drive assembly (12) comprises a rotating ring (18) and a rotating ring drive unit (19); a slide bar (20) is provided at a position of the rotating member (8) deviating from the rotation center; a non-radially arranged strip groove (21) is provided on the rotating ring (18); and the slide bar (20) is arranged in the strip groove (21); Alternatively, the self-rotation drive assembly (12) comprises a rotating ring (18) and a rotating ring drive unit (19), a strip groove (21) is provided at a position of the rotating member (8) that deviates from the rotation center, and a slide bar (20) is provided on the rotating ring (18), and the slide bar (20) is arranged in the strip groove (21).

6. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 1, 2, 3 or 4, characterized in that: The rotating member (8) is a lever (22) or a geometric plate.

7. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 6, characterized in that: The lever (22) is an L-shaped lever (22), and the pivot structure (10) is provided between the two ends of the lever (22). A pushing connection structure (11) is provided between one end of the lever (22) and the valve core (6), which can push the valve core (6) to move along the second axis (4) when the lever (22) rotates. The other end of the lever (22) is connected to a self-rotating drive component (12) that can drive the rotating member (8) to rotate.

8. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 1, 2, 3 or 4, characterized in that: The valve core (6) comprises a flow control rod (23), the inner end of the flow control rod (23) being arranged in the valve core movable hole (5) and being able to extend into the flow channel (3) to control the flow, and the outer end of the flow control rod (23) being arranged in the movable cavity (24) of the mold assembly (9), and the driving mechanism (7) is also arranged in the movable cavity (24).

9. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 8, characterized in that: The diameter of the flow control rod (23) matches the aperture of the flow channel (3), and the inner end of the flow control rod (23) is adapted to the inner wall of the flow channel (3); Alternatively, the diameter of the flow control rod (23) matches the aperture of the flow channel (3), and a clearance hole is provided on the inner wall of the flow channel (3) on the side opposite to the valve core movable hole (5), through which the flow control rod (23) can pass through the flow channel (3) and enter.

10. The flow control valve for controlling the molten material flowing out of the gate into the mold cavity according to claim 8, characterized in that: A plurality of flow control rods (23) are distributed circumferentially along the second axis (4), and the number of the flow control rods (23) is ≥2. The inner ends of the plurality of flow control rods (23) can be fitted into each other after abutting against each other, so as to close the flow channel (3).

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