A high-precision pressure injection molding equipment

Abstract

The present application relates to a high-precision pressure injection molding equipment, which relates to the field of injection molding technology, including a filling device and a heating device. The filling device includes an injection molding tube, and the injection molding tube includes an outer shell designed in the shape of a circular tube. The interior of the outer shell is arranged to be hollow, and the interior of the outer shell is divided into three layers of cavities from the outside to the inside to form an outer insulation layer, a temperature control layer and an injection molding cavity; a rotating mechanism is arranged inside the injection molding cavity, and the rotating mechanism includes a segmented main shaft, spiral blades and a power motor. The segmented main shaft includes a main power shaft and a driven power shaft. The spiral blades are arranged on the main power shaft, the telescopic section and the fixed section. The rotation directions of the spiral blades arranged on the main power shaft, the telescopic section and the fixed section are the same, and the sizes of the spiral blades arranged on the telescopic section and the fixed section are larger than the sizes of the spiral blades on the main power shaft. The present application has the technical effect of providing a higher pressure for the liquid material injected into the mold.

Description

Technical Field

[0001] The present application relates to the field of injection molding technology, and in particular to a high-precision pressure injection molding device. Background Art

[0002] At present, the processing of fluorine-lined metal parts is mostly made by injection molding process. Injection molding machine is used in the manufacturing process of fluorine-lined metal parts. Injection molding machine is also called injection molding machine or. It is the main molding machine that uses plastic molding molds to make plastic products of various shapes from or thermosetting plastics.

[0003] However, when using an injection molding machine to manufacture fluorine-lined metal parts, since the materials used to make fluorine-lined metal parts have high temperature resistance and corrosion resistance, the temperature at which the injection molding machine heats the plastic and the pressure applied to the molten plastic are required to be high. The liquid material ejected by the injection molding machine needs to have a high pressure to fill the mold cavity.

[0004] In the prior art, the injection molding machine is equipped with an injection molding device specifically used to increase the pressure of the liquid material, which often cannot adapt to and meet the growing production needs of fluorine-lined metal parts. As a result, the fluorine-lined metal parts cannot provide a higher injection molding pressure for their liquid materials during the injection molding process. After the liquid material is pressurized and injected into the mold, it is easy to form air cavities or bubbles inside the mold, resulting in poor mechanical properties of the internal structure of the product, which is easy to be damaged during use. Summary of the invention

[0005] In order to provide a higher pressure injection molding device for installation on an injection molding machine to provide a higher pressure for liquid material injected into a mold, the present application provides a high-precision pressure injection molding device.

[0006] The present application provides a high-precision pressure injection molding device, which adopts the following technical solution:

[0007] A high-precision pressure injection molding device, comprising a filling device and a heating device, wherein the filling device comprises an injection molding tube, wherein the injection molding tube comprises an outer shell designed in the shape of a round tube, wherein the interior of the outer shell is arranged to be hollow, and wherein the interior of the outer shell is divided into three layers of cavities from the outside to the inside to form an outer heat-insulating layer, a temperature-controlling layer and an injection molding cavity;

[0008] The heating device comprises a honeycomb heating tube, wherein the honeycomb heating tube comprises a tube body in the shape of a cylindrical hollow tube, wherein the tube body is provided with an inner and outer layer to form an inner tube and an outer tube, and a graphite plate and an electric heating element are provided between the inner tube and the outer tube;

[0009] A rotating mechanism is arranged inside the injection cavity, and the rotating mechanism includes a segmented main shaft, spiral blades and a power motor. The segmented main shaft includes a main power shaft and a secondary power shaft. The spiral blades are arranged on the main power shaft, the telescopic section and the fixed section. The rotation directions of the spiral blades arranged on the main power shaft, the telescopic section and the fixed section are the same, and the sizes of the spiral blades arranged on the telescopic section and the fixed section are larger than the sizes of the spiral blades on the main power shaft.

[0010] By adopting the above technical scheme, the setting of the spiral blades, the power shaft and the slave power shaft can enhance the impact force of the material liquid by the spiral blades on the telescopic section and the fixed section in turn, thereby enhancing the inertia force of the material liquid, so that the pressure of the liquid material sprayed from the high-pressure discharge nozzle is greater, and the technical effect of pressurizing the liquid material is achieved; by setting the heating device, the heating device includes a honeycomb heating tube, and the heating device can always maintain the high temperature in the injection cavity to prevent the liquid material from solidifying in the injection cavity.

[0011] In a specific possible implementation manner, the graphite plate is processed into a square plate with a curved surface that matches the curved surface of the inner wall of the inner tube. A plurality of graphite plates are provided, and a spacer bar is provided between each of the graphite plates.

[0012] By adopting the above technical solution, by setting the spacer bars, the spacer bars are used to space and fix the graphite plates, and the graphite plates are laid on the inner tube, which can expand the heat conduction area of ​​the injection cavity and make the heating of the injection cavity in all angles more uniform.

[0013] In a specific possible implementation scheme, the spacer strip includes a long strip portion and a "U"-shaped holder arranged on the top of the long strip portion. A groove is opened on the side of the long strip portion to form a snap-in groove, and the side wall of the graphite plate is snap-into the snap-in groove.

[0014] By adopting the above technical solution, the setting of the clamping groove is used to clamp and fix the graphite plate, and the top shape of the long strip part is designed as a "U"-shaped clamping seat, which is convenient for the clamping seat to clamp and fix the electric heating element.

[0015] In a specific possible implementation scheme, a plurality of the electric heating elements are provided, and the electric heating elements are vertically arranged along the length direction of the tube body. The bottom of the electric heating element is inserted into the socket and fixed therein. The plurality of electric heating elements are fixed in series by a plurality of metal wires, and the metal wires are arranged in a ring shape.

[0016] By adopting the above technical solution, the electric heating elements are vertically arranged along the length direction of the tube body, which can increase the number of installed electric heating elements and improve the space utilization rate.

[0017] In a specific feasible implementation scheme, a cavity is opened at one end of the main power shaft away from the power motor to form a buffer chamber, and the interior of the buffer chamber adopts a segmented design with different cross-sectional diameters, so that the buffer chamber forms a liquid storage chamber and a discharge chamber, and the cross-sectional diameter of the liquid storage chamber is smaller than the cross-sectional diameter of the discharge chamber, and a plurality of through holes are opened at one end of the liquid storage chamber away from the buffer chamber to form a liquid hole, and the liquid hole connects the buffer chamber with the liquid storage chamber, and a one-way valve is fixedly arranged inside each of the liquid holes.

[0018] By adopting the above technical solution and arranging the liquid hole and the one-way valve, the liquid hole and the one-way valve can make the material liquid enter the buffer chamber only in one direction and cannot flow out in the reverse direction.

[0019] In a specific possible implementation scheme, a circular shaft is fixedly provided at one end of the liquid storage chamber away from the discharge chamber to form an intracavity shaft, and a circular through hole is opened at one end of the discharge chamber away from the liquid storage chamber to form a guide opening, the inner diameter of the guide opening is larger than the diameter of the intracavity shaft, and the length of the intracavity shaft is set to the end of the guide opening away from the discharge chamber, so that a gap is formed between the inner wall of the guide opening and the intracavity shaft.

[0020] By adopting the above technical solution, the guide port is used to cooperate with the plug connector for plugging, and a gap is formed between the inner wall of the guide port and the shaft in the cavity to facilitate the discharge of liquid materials.

[0021] In a specific possible implementation scheme, a buffer disk is slidably arranged on the shaft in the cavity, and the buffer disk includes a disk body arranged in a disk shape and a guide column arranged in a cylindrical shape. The disk body and the guide column are integrally arranged, and an axial hole is opened along the axial direction of the disk body and the guide column. The buffer disk is slidably arranged on the shaft in the cavity through the axial hole.

[0022] By adopting the above technical solution, the buffer plate is used to squeeze the liquid in the liquid storage cavity, thereby forming a liquid buffer force in the liquid storage cavity. This setting can buffer the impact force of the telescopic section, thereby reducing impact damage to the main power shaft.

[0023] In a specific possible implementation mode, an annular groove is opened on the circumference of the disk body to form a sealing groove, and an elastic sealing ring is nested in the sealing groove.

[0024] By adopting the above technical solution, the provision of the elastic sealing ring can improve the sealing performance when the disc body of the buffer disc contacts the inner wall of the liquid storage cavity, increase the squeezing force of the liquid material in the liquid storage cavity, and prevent the loss of the liquid material in the liquid storage cavity.

[0025] In a specific possible implementation scheme, a plug connector is provided at one end of the telescopic section close to the main power shaft, and the plug connector is configured as a hollow circular tube having a shape matching that of the guide column.

[0026] By adopting the above technical solution and setting the plug connector, the plug connector is used to push the buffer disk so that the buffer disk moves in the buffer cavity, and when playing a buffering role, the disk body can extend into the buffer cavity.

[0027] In a specific possible implementation manner, a plurality of discharge ports are provided on the side wall of the injection molding cavity, and a high-pressure discharge nozzle is connected to the discharge ports on the outside of the injection molding tube.

[0028] By adopting the above technical solution and setting the discharge port, the discharge port is used to discharge the liquid material, and the high-pressure discharge nozzle is used to further increase the pressure of the liquid material.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. A rotating mechanism is arranged inside the injection molding cavity, the rotating mechanism includes a segmented main shaft, spiral blades and a power motor, the segmented main shaft includes a main power shaft and a slave power shaft, and the spiral blades are arranged on the main power shaft, the telescopic section and the fixed section. By adopting these technical schemes, the arrangement of the spiral blades, the power shaft and the slave power shaft can enhance the impact force of the material liquid in turn by the spiral blades on the telescopic section and the fixed section, thereby enhancing the inertia force of the material liquid, so that the pressure of the liquid material sprayed from the high-pressure discharge nozzle is greater, and the technical effect of pressurizing the liquid material is achieved; by arranging the heating device, the heating device includes a honeycomb heating tube, and the heating device can always maintain the high temperature in the injection molding cavity to prevent the liquid material from solidifying in the injection molding cavity, so that the liquid material finally injected into the mold can quickly fill the mold cavity with extremely high pressure, reducing the generation of air cavities or bubbles.

[0031] 2. Through the setting of the heating device, the heating element of the heating device is mainly an electric heating element. The heat emitted by the electric heating element is evenly distributed by the graphite plate, so that the heat reaching the injection cavity is more uniform, so that the injection cavity is kept at a certain temperature to prevent the liquid material from solidifying in the injection cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of an embodiment of the present application;

[0033] Figure 2 and Figure 3 are two cross-sectional views of an embodiment of the present application;

[0034] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0035] Figure 5 yes Figure 2 A partial enlarged view of the middle A;

[0036] Figure 6 It is a schematic diagram of the specific structure of the honeycomb heating tube;

[0037] Figure 7 Schematic diagram of the specific structure of the main power shaft and the driven power shaft.

[0038] Explanation of the accompanying drawings: 1. injection molding tube; 2. shell; 21. outer insulation layer; 22. temperature control layer; 3. injection molding cavity; 31. spiral blade; 33. power motor; 34. main power shaft; 35. slave power shaft; 351. plug connector; 352. telescopic section; 353. fixed section; 354. limiting flange; 4. buffer cavity; 41. liquid hole; 42. shaft in cavity; 43. liquid storage cavity; 44. discharge cavity; 45. guide port; 46. buffer disk; 461. disk body; 462. guide column; 463. sealing groove; 464. elastic sealing ring; 5. injection molding port; 6. discharge port; 7. high-pressure discharge nozzle; 8. honeycomb heating tube; 81. graphite plate; 82. electric heating element; 84. spacer strip; 85. long strip; 86. snap-in groove; 87. holder; 91. inner tube; 92. outer tube. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-7 This application is described in further detail.

[0040] In the description of the invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0041] The present application embodiment discloses a high-precision pressure injection molding device, referring to Figure 1 and Figure 2 , including a filling device and a heating device, the filling device includes an injection tube 1. The injection tube 1 includes an outer shell 2 designed in the shape of a circular tube, the interior of the outer shell 2 is set to be hollow, and the interior of the outer shell 2 is divided into three layers of cavities from the outside to the inside to form an outer insulation layer 21, a temperature control layer 22 and an injection cavity 3, the inner diameter of the outer insulation layer 21 is set to the smallest, the outer insulation layer 21 is mainly used to insulate the temperature control layer 22 and the injection cavity 3, the injection cavity 3 is used to store liquid materials, and the injection tube 1 is provided with an injection port 5 connected to the injection cavity 3, and the injection port 5 is used to inject liquid materials into the injection cavity 3.

[0042] Reference Figure 2 , Figure 3 , Figure 6 and Figure 4The heating device includes a honeycomb heating tube 8, which is arranged inside the temperature control layer 22, and the honeycomb heating tube 8 is arranged as a hollow round tube shape. The honeycomb heating tube 8 is fixedly arranged inside the temperature control layer 22 and wraps the injection cavity 3 inside the honeycomb heating tube 8. The honeycomb heating tube 8 includes a tube body in the shape of a cylindrical hollow tube, and the tube body is arranged as an inner and outer layer tube 91 and an outer tube 92. A graphite plate 81 and an electric heating element 82 are arranged between the inner tube 91 and the outer tube 92. The electric heating element 82 is mainly composed of an electric heating wire. The graphite plate 81 is processed into a square plate with an arc surface that matches the arc surface of the inner wall of the inner tube 91. There are multiple graphite plates 81. In order to fix the graphite plate 81, a spacer bar 84 is arranged between each graphite plate 81, and the spacer bar 84 includes a long strip portion 85 and a "U"-shaped holder 87 arranged at the top of the long strip portion 85. The length direction of the holder 87 is perpendicular to the length direction of the strip portion 85, and the strip portion 85 is configured as a rectangular strip that fits on the side of the inner tube 91 close to the outer tube 92. The strip portion 85 is arranged along the length direction of the tube body, and a groove is provided on the side of the strip portion 85 to form a clamping groove 86. The side wall of the graphite plate 81 is clamped in the clamping groove 86, thereby forming a clamping fixation of the graphite plate 81.

[0043] There are multiple electric heating elements 82, which are mainly composed of electric heating wires bent into an "S" shape. The "S" shape can increase the heating performance of the electric heating element 82. The electric heating element 82 is vertically arranged along the length direction of the tube body, and the bottom of the electric heating element 82 is inserted and fixed in the holder 87. The multiple electric heating elements 82 are fixed in series by multiple metal wires, and the metal wires are arranged in a ring shape.

[0044] The graphite plate 81 has a high thermal conductivity. When the electric heating element 82 is heated, the high temperature is evenly directed to the inner tube 91, so that the temperature transmitted to the injection cavity 3 in all directions is more uniform. When the electric heating element 82 is heating, part of the heat will be radiated to the inner wall of the outer tube 92 in the form of light. In order to avoid energy waste, the inner wall of the outer tube 92 is mirror-polished so that the outer tube 92 radiates heat in the direction of the inner tube 91, thereby increasing the heating speed of the injection cavity 3.

[0045] Reference Figure 2 , Figure 5 and Figure 7 The injection cavity 3 is set as a hollow cavity in the center of the injection tube 1. A rotating mechanism is set inside the injection cavity 3. The rotating mechanism includes a segmented main shaft, a spiral blade 31 and a power motor 33. The segmented main shaft includes a main power shaft 34 and a slave power shaft 35. The power motor 33 is fixedly set at one end of the housing 2. The output shaft of the power motor 33 is fixedly connected to the main power shaft 34. The power motor 33 realizes the technical effect of driving the main power shaft 34 to rotate.

[0046] The end of the main power shaft 34 away from the power motor 33 is provided with a cavity to form a buffer chamber 4. The interior of the buffer chamber 4 adopts a segmented design with different cross-sectional diameters, so that the buffer chamber 4 forms a liquid storage chamber 43 and a discharge chamber 44, wherein the cross-sectional diameter of the liquid storage chamber 43 is smaller than the cross-sectional diameter of the discharge chamber 44, and the discharge chamber 44 is arranged at the end close to the driven power shaft 35, and the end of the liquid storage chamber 43 away from the buffer chamber 4 is provided with a plurality of through holes to form a liquid hole 41, and the liquid hole 41 connects the buffer chamber 4 with the liquid storage chamber 43. A one-way valve is fixedly arranged inside each liquid hole 41, so that the liquid material can only flow from the injection cavity 3 to the liquid storage chamber 43 in one direction.

[0047] A circular shaft is fixedly arranged at one end of the liquid storage chamber 43 away from the discharge chamber 44 to form the inner chamber shaft 42. A circular through hole is opened at one end of the discharge chamber 44 away from the liquid storage chamber 43 to form a guide port 45. The inner diameter of the guide port 45 is larger than the diameter of the inner chamber shaft 42. The length of the inner chamber shaft 42 is set to the end of the guide port 45 away from the discharge chamber 44, so that a gap is formed between the inner wall of the guide port 45 and the inner chamber shaft 42. A buffer disk 46 is slidably arranged on the inner chamber shaft 42. The buffer disk 46 includes a disk body 461 arranged in a disk shape and a guide post 462 arranged in a cylindrical shape. The disk body 461 and the guide post 462 are integrally arranged, and an axial hole is opened along the axial direction of the disk body 461 and the guide post 462. The buffer disk 46 is slidably arranged on the inner chamber shaft 42 through the axial hole. The width of the outer wall of the guide post 462 from the intracavitary shaft 42 matches the size of the gap formed between the inner wall of the guide opening 45 and the intracavitary shaft 42, so that the guide post 462 can slide along the intracavitary shaft 42 into the guide opening 45 and fill the gap formed between the inner wall of the guide opening 45 and the intracavitary shaft 42. The axial length of the guide post 462 is set to be smaller than the axial length of the guide opening 45.

[0048] The diameter of the disc 461 matches the inner diameter of the liquid storage cavity 43, so that the disc 461 can slide into the liquid storage cavity 43. The disc 461 is provided with an annular groove on its circumference to form a sealing groove 463. An elastic sealing ring 464 is embedded in the sealing groove 463. The elastic sealing ring 464 is set as a metal sealing ring. The elastic sealing ring 464 abuts against the inner wall of the liquid storage cavity 43, so as to form a sealing effect between the disc 461 and the liquid storage cavity 43. The length of the buffer disc 46 along its own axis is set to be slightly less than the length of the discharge cavity 44 plus the guide port 45. This setting enables the disc 461 to be completely in the discharge cavity 44 when the buffer disc 46 moves along the cavity axis 42 to the position closest to the guide port 45.

[0049] The slave power shaft 35 is configured as a hollow shaft, and includes a fixed section 353 and a telescopic section 352. The fixed section 353 is fixedly disposed on the inner wall of the injection cavity 3 at one end away from the main power shaft 34, and the telescopic section 352 is slidably sleeved in the fixed section 353. A plug connector 351 is disposed at one end of the telescopic section 352 close to the main power shaft 34, and the plug connector 351 is configured as a hollow round tube whose shape matches the guide column 462. The plug connector 351 can extend into the guide port 45 and sleeved on the guide column 462. The length of the plug connector 351 is set to be greater than the length of the buffer cavity 4. This setting enables the plug connector 351 to have enough length to push the buffer tray 46 to move in the buffer cavity 4. In order to cooperate with the plug connector 351 to push the buffer tray 46, a limiting flange 354 is set on the inner wall of the fixed section 353 to limit the telescopic distance of the telescopic section 352, so that the telescopic length of the telescopic section 352 is matched with the length of the buffer cavity 4, thereby realizing the telescopic movement of the telescopic section 352, and then enabling the plug connector 351 to push the buffer tray 46 to move to the position where the liquid storage cavity 43 is farthest from the discharge cavity 44. The initial position of the telescopic section 352 is by default on the side close to the main power shaft 34.

[0050] The spiral blades 31 are arranged on the main power shaft 34, the telescopic section 352 and the fixed section 353, wherein the spiral blades 31 arranged on the main power shaft 34, the telescopic section 352 and the fixed section 353 have the same rotation direction. The size of the spiral blades 31 arranged on the telescopic section 352 and the fixed section 353 is larger than the size of the spiral blades 31 on the main power shaft 34.

[0051] The injection cavity 3 is provided with a plurality of discharge ports 6 on the side wall near the power shaft 35, and the discharge ports 6 are used to discharge the liquid material. The outside of the injection tube 1 is connected to the discharge port 6 with a high-pressure discharge nozzle 7, which converges the plurality of discharge ports 6, increases the liquid material, and allows the liquid material to be concentratedly sprayed into the mold.

[0052] The implementation principle of the embodiment of the present application is: when actually using a high-precision pressure injection molding device of the present application, in order to prevent the liquid material from cooling and solidifying when injected into the injection cavity 3, it is necessary to preferentially start the heating device to heat the injection cavity 3. After being heated to a preset temperature, the operator can inject the liquid material into the injection cavity 3 through the injection port 5.

[0053] After the liquid material fills the injection cavity 3, the power motor 33 drives the main power shaft 34 to rotate, and the main power shaft 34 drives the spiral blade 31 to rotate. When the spiral blade 31 rotates, it will definitely stir the liquid material and form two different propulsion directions. In the embodiment of the present application, the flow of the liquid material toward the discharge port 6 is called the material feeding process, and the flow of the liquid material in the direction away from the discharge port 6 is called the material retracting process.

[0054] When the material feeding process is in progress, the power motor 33 drives the main power shaft 34 and the spiral blades 31 to rotate, driving the liquid material to flow toward the discharge port 6. Since the spiral blades 31 on the slave power shaft 35 are in the same direction as the spiral blades 31 on the main power shaft 34, when the liquid material impacts the spiral blades 31 on the slave power shaft 35, it drives the slave power shaft 35 to rotate, and the rotation of the slave power shaft 35 drives the spiral blades 31 to rotate.

[0055] The spiral blades 31 provided on the telescopic section 352 rotate, so that the telescopic section 352 is pushed by the liquid material to move from the main power shaft 34 to contact with the fixed section 353. Since the rotation of the main power shaft 34 and the slave power shaft 35 is delayed, the slave power shaft 35 is continuously pushed to rotate by the liquid material. Since the inertia force of the slave power shaft 35 and the material liquid is the same, and the size of the spiral blades 31 provided on the slave power shaft 35 is larger than that of the spiral blades 31 on the main power shaft 34, the material liquid is sequentially enhanced in impact force by the spiral blades 31 on the telescopic section 352 and the fixed section 353, thereby enhancing the inertia force of the material liquid, so that the pressure of the liquid material sprayed from the high-pressure discharge nozzle 7 is greater.

[0056] During the material feeding process, the buffer chamber 4 is filled with liquid material flowing in from the one-way valve, and the buffer plate 46 is pushed into the guide port 45. At this time, the buffer chamber 4 is filled with liquid material.

[0057] When the material is being withdrawn, the liquid material flows in the reverse direction, which can quickly cut off the inertial force of the material liquid that continues to increase, causing the slave power shaft 35 to rotate in the reverse direction, thereby preventing the inertial force of the slave power shaft 35 from causing the material liquid to damage the valve of the mold. When the spiral blade 31 on the slave power shaft 35 rotates in the reverse direction, it drives the telescopic section 352 to move toward the main power shaft 34, and the plug connector 351 is plugged into the intracavity shaft 42, and drives the buffer plate 46 to move toward the liquid storage chamber 43. When the buffer plate 46 moves toward the liquid storage chamber 43, excess material liquid will bypass the buffer plate 46 from the discharge chamber 44 with a larger cross-section and be squeezed out from the guide port 45. However, the liquid material in the liquid storage chamber 43 will remain in the liquid storage chamber 43 under the sealing action of the elastic sealing ring 464. As the buffer plate 46 continues to move, the plate body 461 squeezes the material liquid in the liquid storage chamber 43, so that the material liquid in the liquid chamber forms a reverse force on the buffer plate 46, and forms a buffering effect on the telescopic section 352, thereby preventing the telescopic section 352 from causing an emergency stop impact on the fixed section 353 and the main power shaft 34.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision pressure injection molding device, characterized in that: The invention comprises a filling device and a heating device, wherein the filling device comprises an injection molding tube (1), wherein the injection molding tube (1) comprises an outer shell (2) designed in the shape of a circular tube, wherein the interior of the outer shell (2) is arranged to be hollow, and the interior of the outer shell (2) is divided into three layers of cavities from the outside to the inside, forming an outer heat-insulating layer (21), a temperature-controlling layer (22) and an injection molding cavity (3); The heating device comprises a honeycomb heating tube (8), the honeycomb heating tube (8) comprising a tube body in the shape of a cylindrical hollow tube, the tube body being arranged in two layers, an inner tube (91) and an outer tube (92), a graphite plate (81) and an electric heating element (82) being arranged between the inner tube (91) and the outer tube (92); A rotating mechanism is arranged inside the injection molding cavity (3), and the rotating mechanism comprises a segmented main shaft, a spiral blade (31) and a power motor (33); the segmented main shaft comprises a main power shaft (34) and a secondary power shaft (35); the spiral blade (31) is arranged on the main power shaft (34), the telescopic section (352) and the fixed section (353); the spiral blade (31) arranged on the main power shaft (34), the telescopic section (352) and the fixed section (353) have the same rotation direction; the size of the spiral blade (31) arranged on the telescopic section (352) and the fixed section (353) is larger than the size of the spiral blade (31) on the main power shaft (34).

2. A high-precision pressure injection molding device according to claim 1, characterized in that: The graphite plate (81) is processed into a square plate with a curved surface that matches the curved surface of the inner wall of the inner tube (91). A plurality of graphite plates (81) are provided, and a spacer bar (84) is provided between each of the graphite plates (81).

3. A high-precision pressure injection molding device according to claim 2, characterized in that: The spacer strip (84) comprises a long strip portion (85) and a "U"-shaped holder (87) arranged at the top of the long strip portion (85); a groove is provided on the side of the long strip portion (85) to form a clamping groove (86); and the side wall of the graphite plate (81) is clamped in the clamping groove (86).

4. A high-precision pressure injection molding device according to claim 3, characterized in that: A plurality of the electric heating elements (82) are provided, and the electric heating elements (82) are vertically arranged along the length direction of the tube body. The bottom of the electric heating element (82) is inserted into the holder (87) and fixed therein. The plurality of electric heating elements (82) are fixed in series by a plurality of metal wires, and the metal wires are arranged in a ring shape.

5. A high-precision pressure injection molding device according to claim 1, characterized in that: A cavity is provided at one end of the main power shaft (34) away from the power motor (33) to form a buffer chamber (4). The interior of the buffer chamber (4) adopts a segmented design with different cross-sectional diameters, so that the buffer chamber (4) forms a liquid storage chamber (43) and a discharge chamber (44). The cross-sectional diameter of the liquid storage chamber (43) is smaller than the cross-sectional diameter of the discharge chamber (44). A plurality of through holes are provided at one end of the liquid storage chamber (43) away from the buffer chamber (4) to form a liquid hole (41). The liquid hole (41) connects the buffer chamber (4) with the liquid storage chamber (43), and a one-way valve is fixedly arranged inside each of the liquid holes (41).

6. A high-precision pressure injection molding device according to claim 5, characterized in that: A circular shaft is fixedly arranged at one end of the liquid storage chamber (43) away from the discharge chamber (44) to form an inner chamber shaft (42); a circular through hole is opened at one end of the discharge chamber (44) away from the liquid storage chamber (43) to form a guide opening (45); the inner diameter of the guide opening (45) is larger than the diameter of the inner chamber shaft (42); the length of the inner chamber shaft (42) is set to the end of the guide opening (45) away from the discharge chamber (44), so that a gap is formed between the inner wall of the guide opening (45) and the inner chamber shaft (42).

7. A high-precision pressure injection molding device according to claim 6, characterized in that: A buffer disk (46) is slidably arranged on the intracavitary shaft (42), and the buffer disk (46) includes a disk body (461) arranged in a disk shape and a guide column (462) arranged in a cylindrical shape. The disk body (461) and the guide column (462) are arranged as a whole, and an axial hole is opened along the axial direction of the disk body (461) and the guide column (462). The buffer disk (46) is slidably arranged on the intracavitary shaft (42) through the axial hole.

8. A high-precision pressure injection molding device according to claim 7, characterized in that: An annular groove is provided on the circumferential side of the disk body (461) to form a sealing groove (463), and an elastic sealing ring (464) is nested in the sealing groove (463).

9. A high-precision pressure injection molding device according to claim 7, characterized in that: A plug connector (351) is provided at one end of the telescopic section (352) close to the main power shaft (34), and the plug connector (351) is configured as a hollow circular tube having a shape matching that of the guide column (462).

10. The high-precision pressure injection molding equipment according to claim 1, characterized in that: A plurality of discharge ports (6) are provided on the side wall of the injection molding cavity (3), and a high-pressure discharge nozzle (7) is connected to the discharge ports (6) on the outside of the injection molding tube (1).

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