Injection mold capable of conveniently controlling material flow speed

Abstract

The invention discloses an injection mold capable of conveniently controlling the material flow speed, and belongs to the technical field of injection molding devices.The injection mold comprises a bubble filtering box, a material liquid discharging and extruding groove is formed in the bottom of the bubble filtering box, an overheating plate is fixed to the lower surface of the bubble filtering box, the overheating plate and the material liquid discharging and extruding groove are arranged in a staggered mode, and an extruding plug is inserted into the bubble filtering box; a valve body assembly is arranged in the extrusion plug, a driving assembly is arranged at the top of the extrusion plug, and an outer leading assembly is arranged at a liquid inlet of the bubble filtering box. Through cooperative arrangement of the feed liquid discharging and extruding groove and the overheating plate, the extruding plug is driven by the driving assembly to do piston motion in the bubble filtering box, feed liquid extracted by the extruding plug is extruded out of the feed liquid discharging and extruding groove, the extruded feed liquid flows along the surface of the overheating plate and then is heated, the liquidity of the feed liquid is increased, and therefore the feed liquid is more uniform. Bubbles in the feed liquid can be quickly separated out, so that the flowability of the feed liquid in the tail end liquid storage tank is not influenced by the bubbles.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding devices, in particular to an injection mold which is convenient for controlling material flow speed. Background Art

[0002] Precise control of material flow speed by the injection molding machine is the key to achieving high-quality injection molding, which directly affects the appearance, dimensional accuracy and internal structure of the product. Existing injection molding machines use material flow sensor feedback to the motor and change the speed of the motor-driven screw in the conveying pipe to achieve precise control of material flow speed.

[0003] However, before the material is melted by the heating mechanism and enters the mold through the injection port, there is a certain probability that bubbles will be generated inside the material flow, which will affect the flow rate. The viscosity and fluidity of the material flow will be affected by the presence of bubbles, causing the control device to have a certain impact on the stability of the material flow control. At the same time, when the material flow is controlled by the screw, the flow sensor will monitor the liquid flow rate in real time and provide feedback to the motor to provide the appropriate speed, which causes the motor speed to change all the time. Regardless of whether the material flow is affected by the motor speed or its own fluidity, the accuracy of the flow rate control will be greatly reduced. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that there are bubbles inside the material flow that affect its fluidity and the accuracy of flow rate control is greatly reduced due to the influence of motor speed or its own fluidity, and to propose an injection mold that is easy to control the material flow rate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The top of described outer combustion gas heating unit is connected with the pump end face, and the top of described outer combustion gas heating unit is connected with the pump end face. The pump end faces east and west, and the east-west direction of injection molding is upwards, and the injection molding machine is upwards, downwards to the injection molding machine.

[0006] Preferably, one of the regulating impellers is a liquid replenishing wheel, and the other regulating impeller is a liquid recovery wheel.

[0007] Preferably, the valve body assembly includes a through hole opened in the middle of the extrusion plug, a material flow heating tube is inserted into the inner wall of the top pipe mouth of the through hole, a reset spring is fixed at the bottom of the through hole, and a plug valve is fixed at the bottom of the reset spring.

[0008] Preferably, the driving assembly includes a driving motor fixed to the top of the extrusion plug, the housing of the driving motor is fixed to the outer surface of the bubble filter box, and an external positioning buckle is fixed to the outer side of the driving motor.

[0009] Preferably, the external introduction component includes a telescopic tube sleeved on the liquid inlet of the bubble filter box, and one end of the telescopic tube is connected to the melter of the injection molding machine.

[0010] Preferably, the rotating assembly includes a follower gear plate fixed to the outside of the constant impeller, the side of the follower gear plate is meshed with a synchronous gear, a rotating motor is fixed in the middle of the synchronous gear, and one end of the rotating motor is fixed to the bottom of the terminal liquid storage tank.

[0011] Preferably, the speed matching assembly includes a speed matching gear fixed to the outside of the regulating impeller, the side of the speed matching gear is meshed with a differential gear, the middle of the differential gear is fixed with a speed matching motor, the outside of the speed matching motor is fixed with a fixing rod, and one end of the fixing rod is fixed to the outer surface of the terminal liquid storage tank.

[0012] Preferably, the drainage assembly includes a constant flow tube sleeved on the constant impeller nozzle and a regulating tube sleeved on the regulating impeller nozzle, one end of the constant flow tube and the regulating tube are both inserted into the interior of the flow regulating cavity, and the nozzle of the regulating tube is located at the bottom of the nozzle of the constant flow tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the liquid discharge groove and the superheating plate. The extrusion plug is driven by the driving component to perform piston motion in the bubble filter box. The liquid extracted by the extrusion plug is squeezed out of the liquid discharge groove. The squeezed liquid flows along the surface of the superheating plate and is heated. The fluidity of the liquid is increased, which can promote the rapid separation of bubbles in the liquid. The fluidity of the liquid in the terminal liquid storage tank is not affected by the bubbles, providing favorable conditions for ensuring that the liquid is precisely controlled by the constant impeller and the regulating impeller.

[0014] 2. The present invention adopts the coordinated arrangement of a constant impeller and a regulating impeller. The two constant impellers rotate synchronously at a uniform speed. The flow rate of the material flow is precisely controlled by alternating the rotation speed of the two regulating impellers. One of the regulating impellers rotates forward, and when the flow rate of the material liquid is slow, the material liquid is replenished in time to increase the speed of the material flow out of the material liquid filling head. The other regulating impeller rotates reversely, and when the flow rate of the material liquid is fast, the excess material liquid is pumped back into the terminal liquid storage tank in time. The forward and reverse rotation of the two regulating impellers can achieve precise control of the material liquid flow rate. The structure is simple, the accuracy is high, the response is timely, and the material liquid supply can be interrupted in time to avoid excess material liquid being sent into the mold through the material liquid filling head, providing favorable conditions for ensuring that the appearance, dimensional accuracy and internal structure of the product meet the standards.

[0015] 3. The present invention adopts the arrangement of a liquid injection head and a flow regulating chamber. The constant impeller delivers the liquid into the flow regulating chamber through a constant flow tube. The regulating impeller extracts or replenishes the liquid in the flow regulating chamber through a regulating tube. The regulating tube is located at the bottom of the constant flow tube. The replenishment or recovery of the liquid responds promptly, thereby effectively improving the accuracy of the device in controlling the flow rate of the material entering the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an injection mold proposed by the present invention that is convenient for controlling material flow speed; Figure 2 This is a schematic cross-sectional view of an overall injection mold for controlling material flow rate, as proposed by the present invention; Figure 3 This is a schematic diagram of the exploded structure of an injection mold proposed by the present invention for facilitating control of material flow rate; Figure 4 This is a schematic diagram of the explosion structure of a drive component in an injection mold that facilitates controlling material flow rate, as proposed by the present invention; Figure 5 This is a schematic structural diagram of a rotating component in an injection mold for facilitating material flow rate control proposed by the present invention; Figure 6 This is a schematic structural diagram of a bubble filter box in an injection mold that facilitates controlling material flow rate, as proposed by the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0017] In the figure: 1. Bubble filter box; 2. Liquid discharge groove; 3. Superheating plate; 4. Extrusion plug; 5. Terminal liquid storage tank; 6. Accommodating hole; 7. Constant impeller; 8. Control impeller; 9. Liquid injection head; 10. Flow adjustment chamber; 11. Through hole; 12. Flow heating pipe; 13. Return spring; 14. Plug valve; 15. Drive motor; 16. External positioning buckle; 17. Telescopic tube; 18. Follower gear disc; 19. Synchronous gear; 20. Rotating motor; 21. Speed matching gear; 22. Differential gear; 23. Speed matching motor; 24. Fixed rod; 25. Constant flow tube; 26. Flow adjustment pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0021] Example, see Figures 1 to 7, an injection mold that is convenient for controlling the material flow rate, includes a bubble filter box 1, a material liquid discharge groove 2 is opened at the bottom of the bubble filter box 1, a superheating plate 3 is fixed to the lower surface of the bubble filter box 1, and the superheating plate 3 and the material liquid discharge groove 2 are staggered, an extrusion plug 4 is inserted into the interior of the bubble filter box 1, and a valve body assembly is provided inside the extrusion plug 4, further, the valve body assembly includes a through hole 11 opened in the middle of the extrusion plug 4, a material flow heating pipe 12 is inserted into the inner wall of the top pipe mouth of the through hole 11, a reset spring 13 is fixed to the bottom of the through hole 11, and a plug valve 14 is fixed to the bottom of the reset spring 13.

[0022] A further advantage of adopting the above method is that the extrusion plug 4 is driven by the driving assembly to perform piston motion at a uniform speed in the bubble filter box 1. When the extrusion plug 4 moves upward, the plug valve 14 is squeezed out of the through hole 11 by the gravity of the liquid, and the liquid is sent into the bottom of the bubble filter box 1 through the through hole 11 in the middle of the extrusion plug 4. When the extrusion plug 4 moves downward, the plug valve 14 is affected by the pulling force of the return spring 13 and the reaction force of the liquid at the bottom on the plug valve 14 when the plug valve 14 descends, and the plug valve 14 is sent to the bottom of the through hole 11 to prevent the liquid from flowing back. At this time, the liquid at the bottom of the bubble filter box 1 can be squeezed out from the liquid discharge groove 2. The liquid passing through the liquid discharge groove 2 will flow in a plane over the surface of the superheating plate 3 and be heated. The fluidity of the liquid increases due to heat, which prompts the bubbles to be quickly separated from the liquid.

[0023] A driving assembly is provided on the top of the extrusion plug 4. Further, the driving assembly includes a driving motor 15 fixed to the top of the extrusion plug 4. The shell of the driving motor 15 is fixed to the outer surface of the bubble filter box 1. An external positioning buckle 16 is fixed to the outside of the driving motor 15.

[0024] A further advantage of adopting the above method is that the drive motor 15 serves as a power source for the piston movement of the extrusion plug 4 in the bubble filter box 1 .

[0025] The liquid inlet of the bubble filter box 1 is provided with an external introduction component. Further, the external introduction component includes a telescopic tube 17 sleeved on the liquid inlet of the bubble filter box 1, and one end of the telescopic tube 17 is connected to the melter of the injection molding machine.

[0026] A further benefit of adopting the above method is that the telescopic tube 17 is connected to the liquid discharge port of the melter of the injection molding machine to provide the required liquid to the liquid inlet of the bubble filter box 1.

[0027] The bottom end of the bubble filter box 1 is sleeved with a terminal liquid storage tank 5, and two groups of accommodating holes 6 are opened at the bottom of the terminal liquid storage tank 5. The inner wall of one group of accommodating holes 6 is plugged with a constant impeller 7, and the inner wall of the other group of accommodating holes 6 is plugged with a regulating impeller 8, one of the regulating impellers 8 is a liquid replenishing wheel, and the other regulating impeller 8 is a liquid recovery wheel. The two constant impellers 7 are connected by a rotating assembly. Furthermore, the rotating assembly includes a follower gear disc 18 fixed to the outside of the constant impeller 7, and the side of the follower gear disc 18 is meshed with a synchronous gear 19. A rotating motor 20 is fixed to the middle of the synchronous gear 19, and one end of the rotating motor 20 is fixed to the bottom of the terminal liquid storage tank 5.

[0028] A further advantage of adopting the above method is that the blades of the constant impeller 7 and the regulating impeller 8 are hook-shaped. When the constant impeller 7 and the regulating impeller 8 rotate in the accommodating hole 6, the slurry can be sent from the through hole between the constant impeller 7 and the regulating impeller 8 into the constant flow tube 25 and the distribution tube 26. This technology is existing technology and will not be described in detail here. The rotating motor 20 provides power for the synchronous gear 19 to drive the constant impeller 7 to rotate synchronously.

[0029] The sides of the two regulating impellers 8 are provided with a speed matching assembly. Furthermore, the speed matching assembly includes a speed matching gear 21 fixed to the outside of the regulating impeller 8, and the side of the speed matching gear 21 is meshed with a differential gear 22. A speed matching motor 23 is fixed to the middle of the differential gear 22, and a fixing rod 24 is fixed to the outside of the speed matching motor 23. One end of the fixing rod 24 is fixed to the outer surface of the terminal liquid storage tank 5.

[0030] A further advantage of adopting the above method is that the two regulating impellers 8 can respectively realize forward rotation and reverse rotation under the drive of the speed matching motor 23. The forward rotating regulating impeller 8 can timely replenish the material liquid to the flow regulating chamber 10 through the regulating pipe 26, and the reverse rotating regulating impeller 8 can timely recover the material liquid from the flow regulating chamber 10 through the regulating pipe 26, so as to realize the function of accurately controlling the flow rate of the material liquid.

[0031] The pipe orifices of the constant impeller 7 and the regulating impeller 8 are connected to the liquid filling head 9 through a drainage component. Furthermore, the drainage component includes a constant flow tube 25 sleeved on the pipe orifice of the constant impeller 7 and a regulating tube 26 sleeved on the pipe orifice of the regulating impeller 8. One end of the constant flow tube 25 and the regulating tube 26 are both inserted into the interior of the flow regulating cavity 10, and the pipe orifice of the regulating tube 26 is located at the bottom of the pipe orifice of the constant flow tube 25. A flow regulating cavity 10 is opened inside the liquid filling head 9.

[0032] A further advantage of adopting the above method is that the regulating pipe 26 is located at the bottom of the constant flow pipe 25, and the constant flow pipe 25 provides a stable supply of liquid. The two regulating pipes 26 can replenish liquid into the regulating chamber 10 or extract liquid from the regulating chamber 10 in a timely manner under the action of the regulating impeller 8.

[0033] When the present invention is in use, the melted liquid is supplied from the liquid discharge port of the injection molding machine to the bubble filter box 1 through the telescopic tube 17, and the extrusion plug 4 is driven by the drive motor 15 to perform piston motion at a uniform speed in the bubble filter box 1. When the extrusion plug 4 moves upward, the plug valve 14 is squeezed out of the through hole 11 by the gravity of the liquid, and the liquid is fed into the bottom of the bubble filter box 1 through the through hole 11 in the middle of the extrusion plug 4. When the extrusion plug 4 moves downward, the plug valve 14 is affected by the pulling force of the return spring 13 and the reaction force of the bottom liquid to be fed into the bottom of the through hole 11. At this time, the liquid at the bottom of the bubble filter box 1 is squeezed out from the liquid discharge groove 2. The liquid passing through the liquid discharge groove 2 is flat and slides across the surface of the superheating plate 3 and is heated. The liquid fluidity increases due to the heat, which promotes the rapid separation of bubbles from the liquid. After filtering out the bubbles, the liquid falls into the terminal liquid storage tank 5. The rotating motor 20 rotates through the synchronous gear 19 to drive the two constant impellers 7 to rotate at a constant speed in the accommodating hole 6. The rotation of the constant impeller 7 can send the liquid from the terminal liquid storage tank 5 into the flow regulating chamber 10 through the constant flow tube 25. The two regulating impellers 8 are driven by the speed matching motor 23 to realize forward and reverse rotation respectively. The forward rotating regulating impeller 8 can replenish the liquid from the flow regulating chamber 10 in time, and the reverse rotating regulating impeller 8 can recover the liquid from the flow regulating chamber 10 in time. The entire liquid flow rate control process is realized by the forward and reverse rotation of the two regulating impellers 8. Finally, the liquid is sent into the mold through the liquid filling head 9.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An injection mold for easily controlling material flow rate, comprising a bubble filter box (1), characterized in that: The bottom of the bubble filter box (1) is provided with a liquid discharge groove (2), the lower surface of the bubble filter box (1) is fixed with a superheating plate (3), and the superheating plate (3) and the liquid discharge groove (2) are arranged alternately, the interior of the bubble filter box (1) is plugged with an extrusion plug (4), the interior of the extrusion plug (4) is provided with a valve body assembly, the top of the extrusion plug (4) is provided with a driving assembly, the liquid inlet of the bubble filter box (1) is provided with an external lead assembly, the bottom end of the bubble filter box (1) is sleeved with a terminal liquid storage tank (5), and the terminal Two groups of accommodating holes (6) are provided at the bottom of the end liquid storage box (5), wherein a constant impeller (7) is inserted into the inner wall of one group of accommodating holes (6), and a regulating impeller (8) is inserted into the inner wall of the other group of accommodating holes (6), the two constant impellers (7) are connected via a rotating assembly, and the sides of the two regulating impellers (8) are both provided with a speed matching assembly, and the pipe openings of the constant impeller (7) and the regulating impeller (8) are both connected to a liquid injection head (9) via a drainage assembly, and a flow regulating chamber (10) is provided inside the liquid injection head (9).

2. The injection mold for controlling material flow rate according to claim 1, characterized in that: One of the regulating impellers (8) is a liquid replenishing wheel, and the other regulating impeller (8) is a liquid recovery wheel.

3. The injection mold for facilitating material flow rate control according to claim 1, characterized in that: The valve body assembly comprises a through hole (11) opened in the middle of the extrusion plug (4), a material flow heating pipe (12) is inserted into the inner wall of the top end of the through hole (11), a return spring (13) is fixed at the bottom of the through hole (11), and a plug valve (14) is fixed at the bottom of the return spring (13).

4. The injection mold for facilitating material flow rate control according to claim 1, characterized in that: The drive assembly comprises a drive motor (15) fixed to the top of the extrusion plug (4); a housing of the drive motor (15) is fixed to the outer surface of the bubble filter box (1); and an external positioning buckle (16) is fixed to the outer side of the drive motor (15).

5. The injection mold for facilitating material flow rate control according to claim 1, characterized in that: The external introduction component comprises a telescopic tube (17) sleeved on the liquid inlet of the bubble filter box (1), and one end of the telescopic tube (17) is connected to the melter of the injection molding machine.

6. The injection mold for facilitating material flow rate control according to claim 1, characterized in that: The rotating assembly comprises a follower gear disc (18) fixed to the outside of the constant impeller (7), a side surface of the follower gear disc (18) is meshedly connected with a synchronous gear (19), a rotating motor (20) is fixed in the middle of the synchronous gear (19), and one end of the rotating motor (20) is fixed to the bottom of the terminal liquid storage tank (5).

7. The injection mold for facilitating material flow rate control according to claim 1, characterized in that: The speed matching assembly comprises a speed matching gear (21) fixed to the outside of the regulating impeller (8); a differential gear (22) is meshedly connected to the side of the speed matching gear (21); a speed matching motor (23) is fixed to the middle of the differential gear (22); a fixing rod (24) is fixed to the outside of the speed matching motor (23); and one end of the fixing rod (24) is fixed to the outer surface of the terminal liquid storage tank (5).

8. The injection mold for facilitating material flow rate control according to claim 1, characterized in that: The drainage assembly comprises a constant flow tube (25) sleeved on the nozzle of the constant impeller (7) and a regulating tube (26) sleeved on the nozzle of the regulating impeller (8), one end of each of the constant flow tube (25) and the regulating tube (26) is plugged into the interior of the regulating cavity (10), and the nozzle of the regulating tube (26) is located at the bottom of the nozzle of the constant flow tube (25).

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