Injection mold with a dosing injection structure

Abstract

The application discloses an injection mold with a quantitative injection structure and belongs to the technical field of molds, which comprises a processing table for a mold pair of the injection mold, wherein the injection mold comprises a front mold and a rear mold, the outer side of the front mold is provided with an injection motor, the injection motor is provided with an injection pipe on one side, and a retaining sleeve ring is arranged in the end of the injection pipe. Through the quantitative injection component, the magnetic rigid quantitative plate can be adjusted by magnetic attraction, so that the plate is kept to be inclined backward, the melt with kinetic energy can quickly rush into the thin-wall area of the ladder, the melt is prevented from being cooled and solidified before reaching the thin-wall area, and the melt is prevented from being stagnated, meanwhile, the magnetic block of the rear program is lost, the rigid quantitative plate is expanded under pressure, at this time, the plastic melt is slowly pressed with large pressure, which corresponds to the pressure maintaining stage in the injection process, the shrinkage caused by the thickness difference of the ladder wall can be effectively compensated, the product is ensured to be compact, the graded variable-speed filling in the injection process is realized, and short shot and jet marks are avoided.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to an injection mold with a quantitative injection structure. Background Technology

[0002] The bottom casing of a laptop is mainly used to assemble core components such as the battery, keyboard, and graphics card chip. To accommodate the layout of internal components and heat dissipation requirements, its structure is usually designed with stepped grooves and perforations for ventilation or assembly.

[0003] Currently, the following technical problems exist in the injection molding process of this type of laptop bottom shell with stepped grooves and hollow holes: Difficulty in filling stepped areas: Due to the stepped thickness variation of the shell, during injection molding, the molten plastic preferentially flows to the thicker-walled areas with lower flow resistance. The thinner stepped grooves, however, experience higher flow resistance, leading to slow melt filling, stagnation, or even short-shot defects. If high-speed injection is used to increase the filling speed in the thin-walled areas, jetting patterns (serpentine patterns) can easily form as the melt is injected at high speed from the thicker-walled areas, affecting the product's appearance and structural strength. Conversely, if low injection speed is used, the high-temperature melt can cool prematurely as it flows through the thin-walled stepped areas, causing localized blockage of the mold cavity and resulting in incomplete filling.

[0004] Poor venting in dead-angle areas: The roots of stepped grooves and the thin-walled areas around the perforations are often dead-angles where air gets trapped inside the mold. Traditional mold venting mainly relies on passive extrusion through the tiny gaps at the parting line, which is insufficient to completely expel gas from these deep cavities or dead-angles. Residual gas is compressed and heated under high pressure, easily leading to localized scorching, bubbles, or incomplete filling of the product. Especially in thin-walled areas, gas blockage further exacerbates filling resistance. Based on this, an injection mold with a quantitative injection structure is proposed. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an injection mold with a quantitative injection structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An injection mold with a quantitative injection structure includes a processing table for mold alignment. The injection mold includes a front mold and a rear mold. An injection motor is provided on the outer side of the front mold. An injection pipe is provided on one side of the injection motor. A retaining collar is provided inside the end of the injection pipe. A push column is connected to the inner sidewall of the retaining collar through a reciprocating assembly. A vertical retaining ring is fixed on the outer sidewall of the push column. A quantitative injection assembly for adjusting the injection volume and injection speed of the plastic melt is provided on the sidewall of the vertical retaining ring. A punch block for forming hollow holes in the mold is fixed on the inner wall of the front mold. The front end of the punch block has multiple flow grooves arranged in an array. The flow grooves have conical holes that penetrate the punch block. A receiving chamber is formed inside the punch block. An air inlet is formed at the rear end of the receiving chamber. A pressure regulating airbag is connected to the inner wall of the air inlet through an air inlet assembly. The pressure regulating airbag is connected to the front end of the receiving chamber through a heat-absorbing pad. Multiple pressure arc plates are arranged on the outer side of the pressure regulating airbag. An energy storage telescopic rod is connected to the outer wall of the pressure arc plates. A release magnetic block is fixed to the outer wall of the piston rod end of the energy storage telescopic rod. A limit pad is arranged on one side of the release magnetic block. A limit assembly is arranged outside the limit pad.

[0007] Preferably, a protective cover is fixed to the top of the processing table, and a mold alignment guide rail is fixed to the processing table. The mold alignment guide rail is slidably connected to the front mold and the rear mold respectively through guide seats.

[0008] Preferably, the output end of the injection motor is fixed with a spiral conveying blade, the spiral conveying blade is rotatably connected to the inner wall of the injection pipe, and the injection pipe is connected to the injection hole of the front mold.

[0009] Preferably, the reciprocating assembly includes a knob fixed to the outer wall of the propulsion column, a bidirectional threaded groove that slides with the knob in the inner part of the retaining collar, a sliding sleeve that slides with the propulsion column fixed to the outer wall of the retaining collar, a reciprocating magnetic ring fixed to the outer wall of the retaining collar, a pulse magnetic ring fixed to the inner end face of the sliding sleeve, and a pressure-sensing head fixed to the front end of the propulsion column.

[0010] Preferably, the metering assembly includes a flexible support plate fixed to the outer wall of the vertical retaining ring, a rigid metering plate fixed to the outer wall of the flexible support plate, and a plurality of adjusting magnetic blocks fixed to the outer wall of the push column located behind the rigid metering plate. The rigid metering plate is made of magnetic material.

[0011] Preferably, the rear end of the impact block has multiple sets of air inlet grooves, which are staggered with the conical holes.

[0012] Preferably, the air intake assembly includes a conical hopper fixed to the inner wall of the air intake hole of the impact block, a liquid-blocking mesh cover is fitted to the outer end of the conical hopper, and the inner end of the conical hopper is connected to the pressure regulating airbag through a corrugated pipe. Both the corrugated pipe and the pressure regulating airbag are provided with multiple micro-holes.

[0013] Preferably, the inner wall of the receiving cavity of the impact block is fixedly connected to the pressure arc plate via an energy storage telescopic rod, the limiting pad is fixedly connected to the outer wall of the piston rod of the energy storage telescopic rod, and the limiting pad is provided with multiple transverse protrusions.

[0014] Preferably, the limiting component includes an adjusting telescopic rod fixed in the cavity of the contact block receiving chamber, and the adjusting telescopic rod is fixed with a synchronous magnetic block and an arc-shaped limiting plate by a fixing plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This solution, through the setting of the quantitative injection component, can utilize the adjustment magnetic block to magnetically attract the rigid quantitative plate, keeping it tilted backward. At this time, the melt pushed in by the spiral conveyor blade passes through the tilted rigid quantitative plate and is given a certain lateral kinetic energy, solving the problem that the melt preferentially flows to the thick wall and the thin wall area is filled slowly. The kinetic energy melt can quickly rush into the stepped thin wall area, preventing the melt from cooling and solidifying before reaching the thin wall area, thus preventing stagnation. At the same time, the adjustment magnetic block demagnetizes in the later stage, and the rigid quantitative plate is pressed and unfolded. At this time, the plastic melt is slowly pressed in with high pressure, which corresponds to the holding pressure stage in the injection molding process. This can effectively compensate for the shrinkage caused by the difference in wall thickness of the steps, ensure the product is dense, realize the graded variable speed filling in the injection molding process, and avoid short shots and jet marks.

[0016] 2. This solution, through the setting of the through-hole block, utilizes the flow channel designed at the front end and the conical hole designed at the rear end of the through-hole block. When the melt encounters the through-hole block (the insert for forming the hollow hole), it is no longer passively diverted and slowly merged. The flow channel guides the melt to quickly cover the hole, while the conical hole allows part of the melt to flow to the rear end, which is equivalent to establishing a material flow on the back side of the hole as well. This allows the two melt streams to merge simultaneously at the front and back of the hole, greatly improving the strength of the weld line and improving the appearance.

[0017] 3. This solution, through the setting of a pressure regulating airbag, can utilize the heat-absorbing pad to absorb the heat of the melt. After the gas inside the pressure regulating airbag is heated and expanded, it forms a negative pressure, which is equivalent to installing a small vacuum pump inside the mold. This actively sucks out the dead corners that traditional venting channels cannot cover, such as the root of the steps and the back of the holes, thus avoiding the problem of trapped air burning. Through the cooperation of the energy storage telescopic rod, the release magnetic block and the synchronization magnetic block, a cycle of energy storage-triggering-impact is formed. This intermittent impact pressure will generate small air pressure fluctuations in the mold cavity, which helps to break the surface tension of the melt, making it easier for bubbles to precipitate and be sucked away. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an injection mold with a quantitative injection structure proposed in this invention; Figure 2 This is an overall assembly drawing of an injection mold with a quantitative injection structure proposed in this invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4This is a schematic diagram of the positions of the front mold and the rear mold in an injection mold with a quantitative injection structure proposed in this invention. Figure 5 This is a schematic diagram of the location of the impact block in an injection mold with a quantitative injection structure proposed in this invention; Figure 6 This is a schematic diagram of the internal structure of the injection pipe in an injection mold with a quantitative injection structure proposed in this invention; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the reciprocating component in an injection mold with a quantitative injection structure proposed in this invention; Figure 9 This is a schematic diagram of the front end of the impact block in an injection mold with a quantitative injection structure proposed in this invention; Figure 10 This is a schematic diagram of the liquid-retaining mesh cover in an injection mold with a quantitative injection structure proposed in this invention; Figure 11 This is a cross-sectional view of a punch block in an injection mold with a quantitative injection structure proposed in this invention; Figure 12 This is a schematic diagram of the air intake component in an injection mold with a quantitative injection structure proposed in this invention; Figure 13 This is a schematic diagram of the limiting component in an injection mold with a quantitative injection structure proposed in this invention.

[0019] In the diagram: 1. Machining table; 2. Front mold; 3. Rear mold; 4. Protective cover; 5. Guide seat; 6. Injection motor; 7. Injection pipe; 8. Spiral conveyor blade; 9. Fixing collar; 10. Propulsion column; 11. Knob; 12. Pressure sensor; 13. Reciprocating magnetic ring; 14. Pulse magnetic ring; 15. Vertical retaining ring; 16. Flexible support plate; 17. Rigid metering plate; 18. Adjusting magnetic block; 19. Through block; 20. Conical hole; 21. Conical hopper; 22. Liquid baffle; 23. Bellows; 24. Pressure regulating airbag; 25. Heat-absorbing pad; 26. Pressure arc plate; 27. Energy storage telescopic rod; 28. Release magnetic block; 29. ​​Limiting pad; 30. Adjusting telescopic rod; 31. Arc-shaped limiting plate; 32. Synchronization magnetic block. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example, refer to Figures 1 to 13 An injection mold with a quantitative injection structure includes a processing table 1 for mold alignment. The injection mold includes a front mold 2 and a rear mold 3. An injection motor 6 is provided on the outside of the front mold 2. An injection pipe 7 is provided on one side of the injection motor 6. A retaining collar 9 is provided inside the end of the injection pipe 7. A push column 10 is connected to the inner side wall of the retaining collar 9 through a reciprocating assembly. A vertical retaining ring 15 is fixed on the outer side wall of the push column 10. A quantitative injection assembly for adjusting the injection volume and injection speed of the plastic melt is provided on the side wall of the vertical retaining ring 15. Furthermore, a protective cover 4 is fixed to the top of the processing table 1, and a mold alignment guide rail is fixed on the processing table 1. The mold alignment guide rail is slidably connected to the front mold 2 and the rear mold 3 respectively through the guide seat 5. A spiral conveyor blade 8 is fixed to the output end of the injection motor 6. The spiral conveyor blade 8 is rotatably connected to the inner wall of the injection pipe 7. The injection pipe 7 is connected to the injection hole of the front mold 2. The reciprocating assembly includes a knob 11 fixed to the outer wall of the push column 10. A bidirectional threaded groove is opened in the retaining collar 9 to slidably connect with the knob 11. A sliding sleeve that slides with the push column 10 is fixed on the outer wall. A reciprocating magnetic ring 13 is fixed on the outer wall of the retaining ring 9. A pulse magnetic ring 14 is fixed on the inner end face of the sliding sleeve. A pressure-sensing head 12 is fixed at the front end of the push column 10. The metering assembly includes a flexible support plate 16 fixed on the outer wall of the vertical retaining ring 15. A rigid metering plate 17 is fixed on the outer wall of the flexible support plate 16. Multiple adjusting magnetic blocks 18 are fixed on the outer wall of the push column 10 located behind the rigid metering plate 17. The rigid metering plate 17 is made of magnetic material. It should be noted that: the disposable liquid-blocking mesh cover 22 is attached to the outer end of the conical hopper 21, and then the front mold 2 and the rear mold 3 are assembled through the guide seat 5. Then, the injection raw material is poured into the injection pipe 7, and the injection motor 6 is started to drive the spiral conveyor blade 8 to rotate, continuously pushing the plastic melt into the mold. In the initial pushing stage, the adjusting magnetic block 18 is kept magnetic to magnetically attract the rigid metering plate 17, so that the rigid metering plate 17 is kept in a backward tilted state. During the injection process, the pressure head 12 is pressed and pushes the push column 10 to move backward, so that the push column 10 drives the knob 11 in the bidirectional threaded groove in the retaining collar 9. The sliding sleeve slides inside, causing the push column 10 to rotate during the sliding process. At the same time, a strong current is intermittently passed through the pulse magnetic ring 14 inside the sliding sleeve (the electromagnetic ring structure is started and stopped by the built-in heat insulation power supply). This will apply a strong magnetic repulsion force to the reciprocating magnetic ring 13, causing the reciprocating magnetic ring 13 to drive the push column 10 to move forward a small distance, so that the push column 10 continues to deflect. This, in turn, drives the inclined rigid metering plate 17 to continue to deflect, so that the plastic melt has a certain kinetic energy when it enters the front mold 2. This allows the plastic melt to quickly enter the thin-walled area of ​​the step in a short time, avoiding the plastic melt from cooling down and being hindered in the injection mold. When the injection molding process is in progress, the control adjustment magnetic block 18 loses its magnetism. During the material pushing process of the push column 10, the rigid metering plate 17 is pressed and adheres to the vertical retaining ring 15, and is in an unfolded state. This allows the plastic melt to be slowly pressed into the injection mold with greater pressure. During the retraction process of the push column 10, the rigid metering plate 17 will be pressed into an inclined state, which facilitates the replenishment of plastic melt for the next slow pressing. The benefits mentioned above are: this can drive the melt to continuously fill the thin-walled area, avoid the initial stage of injection molding stagnation, and allow the melt to be injected at high speed from the thick-walled area into the thin-walled area, generating jet patterns and ensuring the molding quality of the product. A through-hole block 19 for forming the mold hollow hole is fixed on the inner wall of the front mold 2. The front end of the through-hole block 19 has multiple flow grooves arranged in an array, and the flow grooves have tapered holes 20 that penetrate the through-hole block 19. Furthermore, multiple sets of air intake slots are provided on the rear end of the contact block 19, and the air intake slots and the conical hole 20 are arranged alternately. It should be noted that after the plastic melt enters the injection mold, the plastic melt with initial lateral kinetic energy will move rapidly to the periphery of the product's hollow hole through the flow channel on the front end of the impact block 19. At the same time, part of the melt will flow to the rear end of the impact block 19 through the conical hole 20. The advantages mentioned above are: the plastic melt flows evenly after entering the injection mold, which facilitates rapid fusion and flow of the melt on the outside of the penetration block 19; A storage chamber is provided inside the perforated block 19. An air inlet is provided at the rear end of the storage chamber. A pressure regulating airbag 24 is connected to the inner wall of the air inlet via an air inlet assembly. The pressure regulating airbag 24 is connected to the front end of the storage chamber via a heat-absorbing pad 25. Multiple pressure arc plates 26 are provided on the outer side of the pressure regulating airbag 24. An energy storage telescopic rod 27 is connected to the outer wall of the pressure arc plate 26. A release magnetic block 28 is fixed to the outer wall of the piston rod end of the energy storage telescopic rod 27. A limit pad 29 is provided on one side of the release magnetic block 28. A limit assembly is provided outside the limit pad 29. Furthermore, the air intake assembly includes a conical hopper 21 fixed to the inner wall of the air intake hole of the impact block 19. A liquid-blocking mesh cover 22 is attached to the outer end of the conical hopper 21. The inner end of the conical hopper 21 is connected to the pressure regulating airbag 24 through a bellows 23. Both the bellows 23 and the pressure regulating airbag 24 are provided with multiple micro-holes. The inner wall of the storage chamber of the impact block 19 is fixedly connected to the pressure arc plate 26 through an energy storage telescopic rod 27. The limiting pad 29 is fixedly connected to the outer wall of the piston rod of the energy storage telescopic rod 27. Multiple transverse protrusions are provided on the limiting pad 29. The limiting assembly includes an adjusting telescopic rod 30 fixed in the storage chamber of the impact block 19. The adjusting telescopic rod 30 is fixed with a synchronous magnetic block 32 and an arc-shaped limiting plate 31 through a fixing plate. Among them, the liquid-blocking mesh cover 22 is a disposable mesh cover that allows gas to pass through normally and is used to block a small amount of molten plastic to prevent the molten plastic from entering the storage chamber. It should be noted that during the continuous injection of molten plastic, air inside the injection mold flows into the conical hopper 21 through the air inlet groove at the rear end of the impact block 19. During the injection process, the heat-absorbing pad 25 continuously absorbs heat, causing the pressure regulating airbag 24 to expand due to heat (during this process, the micropores on the bellows 23 will be closed under pressure, and the micropores on the pressure regulating airbag 24 will expand). This reduces the internal air pressure of the pressure regulating airbag 24, creating a negative pressure state, which facilitates the active extraction of air from the injection mold through the bellows 23 and the conical hopper 21. Subsequently, the pressure regulating airbag 24 pushes the pressure arc plate 26 to move, and the arc-shaped limiting plate 31 is positioned on the limiting pad 29. When the pressure arc plate 26 moves the release magnetic block 28 to the end of the synchronous magnetic block 32, the release magnetic block 28 on the energy storage telescopic rod 27 will apply magnetic repulsion to the synchronous magnetic block 32, causing the telescopic rod 30 to contract rapidly, thereby moving the arc-shaped limit plate 31, releasing the restriction of the limit pad 29. Then the elastic potential energy stored in the contraction of the energy storage telescopic rod 27 will be released rapidly, causing the energy storage telescopic rod 27 to drive the pressure arc plate 26 to impact and pressurize the pressure regulating airbag 24, thereby allowing the air in the pressure regulating airbag 24 to be forced into the receiving chamber through the micro-holes on the back. This process is repeated to continuously actively draw air from the injection mold. The benefits mentioned above are: actively transferring the air in the injection mold to the receiving cavity of the impact block 19, avoiding air residue in the thin-walled area and stepped area of ​​the injection mold; In use, the disposable liquid-blocking mesh cover 22 is attached to the outer end of the conical hopper 21. Then, the front mold 2 and rear mold 3 are assembled via the guide seat 5. Next, the injection molding material is poured into the injection pipe 7, and the injection motor 6 is started to drive the spiral conveyor blade 8 to rotate, continuously pushing the molten plastic into the mold. During the initial pushing stage, the adjusting magnetic block 18 remains magnetic, magnetically attracting the rigid metering plate 17, keeping it tilted backward. During the injection process, the pressure head 12, when pressed, pushes the propulsion column 10 backward, causing the propulsion column 10 to drive the knob 11 into the bidirectional threaded groove within the retaining collar 9. The sliding sleeve slides inside, causing the push column 10 to rotate during the sliding process. At the same time, a strong current is intermittently passed through the pulse magnetic ring 14 inside the sliding sleeve (the electromagnetic ring structure is started and stopped by the built-in heat insulation power supply). This will apply a strong magnetic repulsion force to the reciprocating magnetic ring 13, causing the reciprocating magnetic ring 13 to drive the push column 10 to move forward a small distance, so that the push column 10 continues to deflect. This, in turn, drives the inclined rigid metering plate 17 to continue to deflect, so that the plastic melt has a certain kinetic energy when it enters the front mold 2. This allows the plastic melt to quickly enter the thin-walled area of ​​the step in a short time, avoiding the plastic melt from cooling down and being hindered in the injection mold. When the injection molding process enters its later stages, the control adjustment magnetic block 18 loses its magnetism. During the material pushing process of the push column 10, the rigid metering plate 17 is pressed and adheres to the vertical retaining ring 15, and is in an unfolded state. This allows the plastic melt to be slowly pressed into the injection mold with greater pressure. During the retraction process of the push column 10, the rigid metering plate 17 is pressed and tilted, which facilitates the replenishment of plastic melt for the next slow pressing. This can push the melt to continuously fill the thin-walled area, avoid the initial stage of injection molding stagnation, and prevent the subsequent high-speed injection of melt from the thick-walled area into the thin-walled area, which would produce jet patterns and ensure the molding quality of the product. After the molten plastic enters the injection mold, the molten plastic with initial lateral kinetic energy will move quickly to the periphery of the product's hollow hole through the flow groove on the front end of the impact block 19. At the same time, part of the molten plastic will flow to the rear end of the impact block 19 through the conical hole 20 (the small hole structure at the end of the conical hole 20 makes the contact connection point weak, allowing the waste material to be directly separated from the mold and the product after demolding). This makes the molten plastic flow uniform after entering the injection mold, which facilitates the rapid fusion and flow of the molten plastic on the outside of the impact block 19. During the continuous injection of molten plastic, air inside the injection mold flows into the conical hopper 21 through the air inlet groove at the rear end of the impact block 19. During the injection process, the heat-absorbing pad 25 continuously absorbs heat, causing the pressure regulating airbag 24 to expand due to heat (during this process, the micropores on the bellows 23 will be closed under pressure, and the micropores on the pressure regulating airbag 24 will expand). This reduces the internal air pressure of the pressure regulating airbag 24, creating a negative pressure state, which facilitates the active extraction of air from the injection mold through the bellows 23 and the conical hopper 21. Subsequently, as the pressure regulating airbag 24 pushes the pressure arc plate 26 to move, the arc-shaped limiting plate 31 continuously slides and limits itself on the limiting pad 29. When the pressure arc plate 26 moves the release magnetic block 28 to the end of the synchronous magnetic block 32, the release magnetic block 28 on the energy storage telescopic rod 27 applies a magnetic repulsive force to the synchronous magnetic block 32, causing the adjusting telescopic rod 30 to contract rapidly, thereby moving the arc-shaped limiting plate 31. The movement releases the restriction on the limiting pad 29, causing the elastic potential energy stored in the energy storage telescopic rod 27 to be released rapidly. This causes the energy storage telescopic rod 27 to drive the pressure arc plate 26 to impact and pressurize the pressure regulating airbag 24, thereby forcing the air in the pressure regulating airbag 24 into the receiving chamber through the micro-holes on the back. This process is repeated to actively draw air from the injection mold and actively transfer the air in the injection mold to the receiving chamber of the impact block 19, avoiding air residue in the thin-walled and stepped areas of the injection mold. After injection molding is completed, the disposable liquid-blocking mesh cover 22 is removed (the waste material connection area of ​​the air inlet groove is a weak connection point on the inner wall of the hollow hole of the product, which can be directly cleaned, and the product can be deburred and finely processed later). The bellows 23 is restored to its initial state, opening the micro-holes on it. The conical bucket 21 is used to draw out the air from the receiving chamber for the next round of injection molding.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An injection mold with a quantitative injection structure, comprising a processing table (1) for mold alignment, the injection mold comprising a front mold (2) and a rear mold (3), characterized in that, An injection motor (6) is provided on the outside of the front mold (2). An injection pipe (7) is provided on one side of the injection motor (6). A retaining collar (9) is provided inside the end of the injection pipe (7). A push column (10) is connected to the inner side wall of the retaining collar (9) through a reciprocating assembly. A vertical retaining ring (15) is fixed on the outer side wall of the push column (10). A quantitative injection assembly for adjusting the injection volume and injection speed of the plastic melt is provided on the side wall of the vertical retaining ring (15). The inner wall of the front mold (2) is fixed with a through block (19) for forming the mold hollow hole. The front end of the through block (19) is provided with a plurality of flow grooves arranged in an array. The flow grooves are provided with a conical hole (20) that penetrates the through block (19). The through block (19) is provided with a storage chamber. The rear end of the storage chamber is provided with an air inlet. The inner wall of the air inlet is connected to a pressure regulating airbag (24) through an air inlet assembly. The pressure regulating airbag (24) is connected to the front end of the storage chamber through a heat absorption pad (25). The outer side of the pressure regulating airbag (24) is provided with a plurality of pressure arc plates (26). The outer wall of the pressure arc plate (26) is connected to an energy storage telescopic rod (27). The outer wall of the piston rod end of the energy storage telescopic rod (27) is fixed with a release magnetic block (28). A limit pad (29) is provided on one side of the release magnetic block (28). A limit assembly is provided outside the limit pad (29).

2. The injection mold with a quantitative injection structure according to claim 1, characterized in that, The processing table (1) is fixed with a protective cover (4) at the top and a mold guide rail is fixed on the processing table (1). The mold guide rail is slidably connected to the front mold (2) and the rear mold (3) respectively through the guide seat (5).

3. The injection mold with a quantitative injection structure according to claim 1, characterized in that, The output end of the injection motor (6) is fixed with a spiral conveying blade (8), which is rotatably connected to the inner wall of the injection pipe (7), and the injection pipe (7) is connected to the injection hole of the front mold (2).

4. The injection mold with a quantitative injection structure according to claim 1, characterized in that, The reciprocating assembly includes a knob (11) fixed on the outer wall of the propulsion column (10), a bidirectional threaded groove that is slidably connected to the knob (11) is provided in the retaining collar (9), a sliding sleeve that is slidably connected to the propulsion column (10) is fixed on the outer wall of the retaining collar (9), a reciprocating magnetic ring (13) is fixed on the outer wall of the retaining collar (9), a pulse magnetic ring (14) is fixed on the inner end face of the sliding sleeve, and a pressure sensing head (12) is fixed at the front end of the propulsion column (10).

5. An injection mold with a quantitative injection structure according to claim 1, characterized in that, The metering assembly includes a flexible support plate (16) fixed on the outer wall of the vertical retaining ring (15), and a rigid metering plate (17) is fixed on the outer wall of the flexible support plate (16). The push column (10) has multiple adjusting magnetic blocks (18) fixed on the outer wall behind the rigid metering plate (17). The rigid metering plate (17) is made of magnetic material.

6. An injection mold with a quantitative injection structure according to claim 1, characterized in that, Multiple sets of air inlet grooves are provided on the rear end of the impact block (19), and the air inlet grooves and the conical hole (20) are arranged alternately.

7. An injection mold with a quantitative injection structure according to claim 1, characterized in that, The air intake assembly includes a conical bucket (21) fixed on the inner wall of the air intake hole of the impact block (19). A liquid-blocking mesh cover (22) is attached to the outer end of the conical bucket (21). The inner end of the conical bucket (21) is connected to the pressure regulating air bag (24) through a bellows (23). Both the bellows (23) and the pressure regulating air bag (24) have multiple micro-holes.

8. An injection mold with a quantitative injection structure according to claim 1, characterized in that, The inner wall of the receiving cavity of the impact block (19) is fixedly connected to the pressure arc plate (26) via the energy storage telescopic rod (27), and the limiting pad (29) is fixedly connected to the outer wall of the piston rod of the energy storage telescopic rod (27). The limiting pad (29) is provided with multiple transverse protrusions.

9. An injection mold with a quantitative injection structure according to claim 1, characterized in that, The limiting component includes an adjusting telescopic rod (30) fixed in the receiving cavity of the contact block (19), and the adjusting telescopic rod (30) is fixed with a synchronous magnetic block (32) and an arc-shaped limiting plate (31) by a fixing plate.

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