Composite PET adhesive film preparation mixing device and mixing method thereof

Abstract

The invention relates to the technical field of PET adhesive film production equipment, and discloses a composite PET adhesive film preparation mixing device and a mixing method thereof.The composite PET adhesive film preparation mixing device comprises a mixed material preparation platform, a feeding mechanism, a primary mixing structure, mixing equipment, a mixing stirring part and a discharging mechanism, and double feeding, front pretreatment, reverse double-acting main mixing and precise discharging are formed; the feeding mechanism is arranged at the top of the mixing equipment and is in sealing fit with the mixing equipment through a connecting piece; the primary mixing structure is located on the outer side of the feeding mechanism, and the output end extends into the feeding mechanism; the mixing and stirring part is arranged in the mixing equipment and is used for mixing and stirring materials; materials to be mixed can directly enter the mixing equipment through the feeding mechanism, or enter the mixing equipment after being mixed in the front of the primary mixing structure, and are discharged through the discharging mechanism after being rotated and uniformly mixed through the mixing and stirring piece.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of PET film production equipment, in particular to a composite PET film preparation mixing device and a mixing method thereof. BACKGROUND

[0002] In the preparation process of the composite PET film, the uniformity of the raw material mixing directly affects the physical properties (such as tensile strength, transparency) and chemical stability of the film. The existing mixing device generally has the following problems: Firstly, for the small modifiers, additives and other materials commonly used in PET film production, there is a lack of effective pre-mixing structure, and direct feeding into the main mixing device can easily lead to material agglomeration and insufficient mixing uniformity. Secondly, the main mixing device usually adopts a single stirring mode (fixed stirring rod stirring), and the material is prone to form local accumulation in the device, and the material flow direction is single during mixing, making it difficult to achieve full-cycle mixing. Thirdly, the feeding structure of some devices has poor flexibility, and the feeding channel cannot be adjusted according to the types and proportions of raw materials, which can easily cause uneven initial mixing of multiple materials.

[0003] To solve the above technical problems, the application designs a composite PET film preparation mixing device with pre-mixing function of small materials, reverse double motion of main mixing and flexible feeding, and a corresponding mixing method, aiming to improve the uniformity and efficiency of PET film raw material mixing and ensure the quality of subsequent film forming. SUMMARY

[0004] The application provides a composite PET film preparation mixing device and a mixing method thereof to solve the problems of uneven mixing of small materials, low main mixing efficiency and poor feeding flexibility of the existing mixing device, and to realize precise and efficient mixing of PET film raw materials.

[0005] The composite PET film preparation mixing device and the mixing method thereof provided by the application adopt the following technical solutions: In a first aspect, a composite PET film preparation mixing device is provided, which includes a mixing preparation platform of a bearing platform and a feeding platform. The bearing platform is used to support and fix a mixing device and a discharging mechanism. The feeding platform is arranged above the mixing device and is used to support and fix a preliminary mixing feeding structure and a feeding mechanism. The feeding mechanism is arranged on the top of the mixing device and is in sealed cooperation with the mixing device through a connecting piece. The preliminary mixing feeding structure is located outside the feeding mechanism and has an output end extending into the feeding mechanism. The mixing and stirring part is arranged inside the mixing device and is used for mixing and stirring the materials. The materials to be mixed can directly enter the mixing device through the feeding mechanism or enter the mixing device after pre-mixing through the preliminary mixing feeding structure. After rotation and uniform mixing by the mixing and stirring part, the materials are discharged through the discharging mechanism.

[0006] Furthermore, the mixing equipment includes: a feeding base fixed to the bearing platform and connected to the input end of the discharging mechanism; a mixing cylinder whose bottom is rotatably connected to the feeding base and whose top is rotatably connected to the feeding mechanism via a rotating bearing; a driven gear fixedly sleeved on the outer wall of the mixing cylinder; a drive gear sleeve meshing with the driven gear and used to drive the mixing cylinder to rotate around its own axis; and an inner spiral guide edge extending axially along the inner wall of the mixing cylinder.

[0007] Furthermore, the mixing rod includes: a rotating rod coaxially passing through the inside of the mixing cylinder, and mixing blades spirally surrounding and fixed to the outer wall of the rotating rod to form a screw structure. When mixing materials, the rotation method of the rotating rod is opposite to the rotation direction of the mixing cylinder, so as to drive the materials to tumble inside the mixing cylinder.

[0008] Furthermore, the spiral direction of the inner spiral guide edge is opposite to that of the mixing blade. When the mixing cylinder drives the inner spiral guide edge to rotate, the inner spiral guide edge forms a downward guiding force on the material, and the mixing blade forms an upward pushing force on the material, so that the material forms an up-and-down circulating convection within the mixing cylinder.

[0009] Furthermore, the mixing blades are uniformly provided with several through holes along their length, through which the material passes during the circulation and convection process.

[0010] Furthermore, the feeding mechanism includes: a disc-shaped feeding cover plate adapted to the top opening of the mixing equipment, the center of which is fixedly connected to the end of the rotating bearing away from the mixing cylinder, and the lower surface of the feeding cover plate is in contact with the top end face of the mixing cylinder to form a seal; the circumferential edge of the feeding cover plate is provided with a plurality of mounting grooves at equal angles along the circumference; a sealing block is provided in the mounting groove, the sealing block corresponds to the mounting groove and is detachably connected; a feeding input pipe with one end adapted to and connected to the inner wall of the mounting groove and connected to the inside of the mixing cylinder; a conical feeding cylinder connected to the end of the feeding input pipe away from the mixing cylinder, the feeding conveying pipe is provided with a conveying screw, one end of the conveying screw extends to the outer wall of the feeding conveying pipe and is connected to the drive motor for driving, for quantitatively conveying the material in the conical feeding cylinder to the mixing cylinder.

[0011] Furthermore, the initial mixing feeding structure includes: an initial mixing box fixed to the upper surface of the feeding platform; a feeding fixing plate horizontally fixed to the top opening of the initial mixing box; a feeding pipe penetrating the feeding fixing plate vertically and communicating with the interior of the initial mixing box; two mixing extrusion screws, which are parallel and horizontally arranged inside the initial mixing box; a mixing output pipe with one end communicating with the initial mixing box and the other end extending into the feeding mechanism; and one end of each of the two mixing extrusion screws extending to the outside of the initial mixing box and being connected to the driving component for transmission.

[0012] Furthermore, the two mixing extrusion screws have opposite thread directions and meshing threads, and rotate synchronously in opposite directions under the drive of the drive unit, which can extrude, shear and axially push the fine materials in the initial mixing box.

[0013] Furthermore, the top of the feeding base is provided with an annular groove that fits the outer wall of the bottom of the mixing cylinder. The bottom of the mixing cylinder is embedded in the annular groove and rotates with the inner wall of the annular groove. The feeding base is provided with a feeding channel inside. One end of the feeding channel is connected upward to the inside of the mixing cylinder, and the other end is connected downward to the discharge mechanism. The discharge mechanism includes a discharge pipe and a valve. One end of the discharge pipe is connected to the feeding channel, and the other end extends outward. The valve is provided on the discharge pipe to control the flow of material discharge.

[0014] Secondly, a method for preparing composite PET film by mixing materials is proposed, including the following steps: S1. According to the requirements for preparing composite PET film, prepare the PET film raw materials to be mixed. Among them, the fine raw materials that need to be premixed are classified separately, and the raw materials that do not need to be premixed are used directly. S2. If the raw material does not require pre-mixing, it is put into the conical feeding cylinder of the feeding mechanism, and the drive motor in the feeding conveying pipe is started to drive the conveying screw to rotate, and the raw material in the conical feeding cylinder is quantitatively conveyed to the mixing cylinder of the mixing equipment; if the raw material is a fine material that needs to be pre-mixed, it is put into the feeding pipe of the primary mixing feeding structure, and the raw material enters the primary mixing box through the feeding pipe. S3. Pre-mixing of fine raw materials: The drive unit of the initial mixing feeding structure is activated. The drive unit drives the two mixing extrusion screws in the initial mixing box to rotate synchronously in opposite directions. The two mixing extrusion screws with opposite screw directions and intermeshing screws extrude, shear and push the fine raw materials axially to achieve pre-mixing of fine raw materials. The mixed fine raw materials are then transported to the mixing cylinder through the mixing output pipe. S4. Start the drive gear sleeve of the mixing equipment. The drive gear sleeve meshes with the driven gear on the outer wall of the mixing cylinder, driving the mixing cylinder to rotate around its own axis. At the same time, start the rotating rod of the mixing agitator, driving the mixing blades that are spirally wrapped around the outer wall of the rotating rod to rotate. The rotation direction of the rotating rod is opposite to the rotation direction of the mixing cylinder. When the mixing cylinder rotates, the inner spiral guide edge on its inner wall rotates together, forming a downward guiding force on the material in the mixing cylinder. The rotation of the mixing blades forms an upward pushing force on the material, so that the material forms an up-and-down circulation convection in the mixing cylinder. At the same time, the material passes through the through holes on the mixing blades during the circulation convection, further realizing the dispersion and uniform mixing of the material. S5. After the mixed material is discharged, the valve of the discharge mechanism is opened after the material is mixed. The uniformly mixed material in the mixing cylinder enters the discharge pipe through the discharge channel of the discharge base and is discharged from the discharge pipe, thus completing the mixing process for the preparation of composite PET film.

[0015] In summary, this application includes the following beneficial technical effects: The primary mixing feed structure uses a double-reverse meshing screw to achieve pre-extrusion and shearing mixing of fine materials, breaking down agglomerates. The main mixing zone adopts a dual-action structure with the mixing cylinder rotating on its own and the mixing agitator rotating in the opposite direction. Combined with the reverse spiral of the inner spiral guide edge and the mixing blades, material circulation and convection are formed. At the same time, the through holes of the mixing blades further enhance the material dispersion, solving the problem of uneven mixing in existing devices.

[0016] The feeding mechanism features multiple sets of detachable sealing blocks and feeding conveying pipes, which can adjust the number of feeding channels according to the type and ratio of raw materials, enabling synchronous quantitative conveying of multiple raw materials and avoiding uneven initial accumulation caused by feeding through a single channel. Attached Figure Description

[0017] Figure 1 This is a perspective view of a composite PET film preparation mixing device according to the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of a composite PET film preparation mixing device according to the present invention.

[0019] Figure 3 This is an exploded view of a composite PET film preparation mixing device according to the present invention.

[0020] Figure 4 This is a schematic diagram of the mixing equipment of the present invention.

[0021] Figure 5 This is a schematic diagram of the initial mixing structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal structure of the initial mixing material structure of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Mixing preparation platform; 2. Feeding mechanism; 3. Initial mixing feeding structure; 4. Mixing equipment; 5. Discharging mechanism; 6. Mixing and stirring component; 11. Bearing platform; 12. Feeding platform; 21. Feeding cover plate; 22. Sealing block; 23. Feeding conveying pipe; 24. Conical discharge cylinder; 31. Initial mixing box; 32. Feeding fixing plate; 33. Feeding pipe; 34. Driving component; 35. Mixing extrusion screw; 36. Mixing cylinder; 41. Driven gear; 42. Drive gear sleeve; 43. Rotating bearing; 44. Inner spiral guide edge; 45. Discharging base; 46. Discharge pipe; 51. Valve; 52. Rotating rod; 61. Mixing blade; 62. Through hole; 63. Detailed Implementation

[0024] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0025] Example 1 This application discloses a composite PET film preparation mixing apparatus. (Refer to...) Figures 1-6 Through modular design, the mixing preparation platform 1, feeding mechanism 2, primary mixing feeding structure 3, mixing equipment 4, mixing and stirring components 6, and discharging mechanism 5 are integrated to form a complete mixing system with dual feeding, pre-treatment, reverse dual-action main mixing, and precise discharging. The specific structure is as follows: like Figure 1 As shown, the mixing preparation platform 1 serves as the supporting foundation for the entire device, including a supporting platform 11 and a feeding platform 12. The supporting platform 11 is horizontally positioned to support and fix the material feeding base 46 and the discharge mechanism 5 of the mixing equipment 4. Anti-slip pads or fixing bolts can be installed at its bottom to ensure the stability of the device during operation. The feeding platform 12 is fixed above the supporting platform 11 by a bracket and is positioned corresponding to the top of the mixing equipment 4. It is used to support and fix the initial mixing feeding structure 3 and the feeding mechanism 2. The height of the feeding platform 12 can be adjusted according to operational needs, making it convenient for staff to add raw materials and maintain the equipment.

[0026] like Figures 2-3As shown, the feeding mechanism 2 is located on top of the mixing equipment 4 and is used for the quantitative conveying of PET film raw materials (PET chips, base resin, etc.) that do not require pre-mixing. It is sealed to the mixing equipment 4 through a rotating bearing 44 (connector). Specifically, it includes: a feeding cover plate 21, a sealing block 22, a feeding conveying pipe 23, and a conical discharge cylinder 24. The feeding cover plate 21 is adapted to the top opening of the mixing cylinder 41 of the mixing equipment 4 and is disc-shaped. Its center is fixedly connected to the end of the rotating bearing 44 away from the mixing cylinder 41. The lower surface of the feeding cover plate 21 is sealed to the top end face of the mixing cylinder 41 by a sealing strip to prevent material dust leakage or external impurities from entering during the mixing process. The circumferential edge of the feeding cover plate 21 has three to six mounting slots at equal angles along the circumference. Each mounting slot is fitted with a sealing block 22. The sealing block 22 is connected to the mounting slot. The sealing block 22 ensures the sealing of the feed cover plate 21 when the feed assembly is not installed, and the connection is detachable via snap-fit ​​or thread. One end of the feed conveying pipe 23 is connected to the inner wall of the mounting groove via a flange, and this end extends through the feed cover plate 21 into the mixing cylinder 41. The other end of the feed conveying pipe 23 extends upward and is welded to the bottom of the conical discharge cylinder 24. The top of the conical discharge cylinder 24 is an open structure to facilitate the input of raw materials, and its inner wall is provided with a smooth coating to prevent the raw materials from adhering. A conveying screw is horizontally installed inside the feed conveying pipe 23. One end of the conveying screw extends to the outside of the feed conveying pipe 23 via a coupling and is connected to a drive motor fixed to the outer wall of the feed conveying pipe 23. The drive motor is a servo motor, and its speed can be adjusted by a PLC control system to achieve quantitative conveying of raw materials and avoid uneven initial accumulation of materials caused by single-channel feeding.

[0027] like Figures 5-6As shown, the initial mixing feeding structure 3 includes: an initial mixing box 31, a feeding fixing plate 32, a feeding pipe 33, a drive component 34, a mixing output pipe 35, and a mixing extrusion screw 36; the initial mixing feeding structure 3 is located outside the feeding mechanism 2 and fixed to the upper surface of the feeding platform 12, and is used for the pre-mixing of fine materials (nano-level fillers, functional additives) in PET film production. Its output end extends into the feeding cover plate 21 of the feeding mechanism 2. The initial mixing box 31 is a rectangular or cylindrical sealed box, fixed to the upper surface of the feeding platform 12, and its inner wall is provided with a wear-resistant coating to extend the service life of the equipment; the feeding fixing plate 32 is horizontally screwed or welded to the top opening of the initial mixing box 31, and multiple feeding holes are opened along the length direction on the feeding fixing plate 32; preferably three; The feed pipe 33 passes vertically through the feed hole of the feed fixing plate 32, and the bottom of the feed pipe 33 is connected to the interior of the preliminary mixing box 31. The top of the feed pipe 33 can be connected to the hopper for easy feeding of fine materials. Two parallel mixing extrusion screws 36 are horizontally arranged inside the preliminary mixing box 31. The threads of the two mixing extrusion screws 36 have opposite directions and the threads mesh with each other. One end of each screw extends to the outside of the preliminary mixing box 31 through a bearing and is connected to the drive component 34 (gear motor) fixed to the outer wall of the preliminary mixing box 31. One end of the mixing output pipe 35 is welded to the bottom of the preliminary mixing box 31, and the other end extends to the interior of the feed cover plate 21 and through the feed cover plate 21 to the interior of the mixing cylinder 41, ensuring that the fine materials after pre-mixing can accurately enter the main mixing area.

[0028] like Figures 2-5As shown, the mixing device 4 includes: a mixing cylinder 41, a driven gear 42, a drive gear sleeve 43, a rotating bearing 44, an inner spiral guide edge 45, and a discharge base 46. The mixing device 4 is the core mixing component of the overall device and is fixed on the support platform 11. Specifically, it includes: the discharge base 46 is a cylindrical structure, fixed on the upper surface of the support platform 11, with an annular groove at its top that fits the outer wall of the bottom of the mixing cylinder 41. A wear-resistant bearing is installed in the annular groove, and the bottom of the mixing cylinder 41 is embedded in the annular groove and rotates with the bearing on the inner wall of the annular groove to ensure the stability of the mixing cylinder 41 when it rotates; the mixing cylinder 41 is a cylindrical hollow structure, with its bottom rotatably connected to the annular groove of the discharge base 46, and its top open through... The rotating bearing 44 is rotatably connected to the feed cover plate 21 of the feeding mechanism 2; a driven gear 42 is welded and fixed in the middle of the outer wall of the mixing cylinder 41, and the driven gear 42 meshes with the drive gear sleeve 43 fixed on the bearing platform 11; the drive gear sleeve 43 is driven by a motor and can drive the mixing cylinder 41 to rotate clockwise or counterclockwise around its own axis, and the rotation speed can be adjusted by the PLC system; the inner spiral guide edge 45 is spirally extended along the inner wall of the mixing cylinder 41, the height of the inner spiral guide edge 45 is 5-10cm, and its spiral direction is opposite to the spiral direction of the mixing blade 62 of the mixing and stirring component 6, which is used to form a downward guiding force on the material when the mixing cylinder 41 rotates, and cooperate with the mixing blade 62 to realize the material circulation and convection.

[0029] like Figure 3 As shown, the mixing and stirring component 6 includes: a rotating rod 61, mixing blades 62, and a through hole 63; the mixing and stirring component 6 is coaxially arranged inside the mixing cylinder 41 of the mixing equipment 4, and is used to cooperate with the mixing cylinder 41 to achieve efficient mixing of materials. Specifically, the rotating rod 61 is a cylindrical metal rod, coaxially inserted inside the mixing cylinder 41, its top is rotatably connected to the feed cover plate 21 through a bearing, its bottom extends to the middle and lower part of the mixing cylinder 41, and is driven by a stirring motor fixed to the top of the feed cover plate 21 through a coupling; the mixing blades 62 are spirally welded and fixed to the outer surface of the rotating rod 61. The wall forms a screw structure, and the pitch of the mixing blades 62 is adapted to the pitch of the inner spiral guide edge 45. The mixing blades 62 are evenly provided with several through holes 63 with a diameter of 1-3cm along their length direction, which are used to disperse the materials during the mixing process and avoid material agglomeration. When the materials are mixed, the rotation direction of the rotating rod 61 is opposite to the rotation direction of the mixing cylinder 41 (when the mixing cylinder 41 rotates clockwise, the rotating rod 61 rotates counterclockwise). The rotation speed of the rotating rod 61 is 50-100r / min. By rotating in the opposite direction, the shear force and tumbling frequency of the materials can be enhanced, and the mixing uniformity can be improved.

[0030] like Figures 2-4As shown, the discharge mechanism 5 includes a discharge pipe 51 and a valve 52. The discharge mechanism 5 is connected to the bottom of the discharge base 46 of the mixing equipment 4 and is used for discharging the mixed material. Specifically, it includes a discharge channel opened inside the discharge base 46, which is a conical channel. One end of the channel is connected upward to the inside of the mixing cylinder 41, and the other end is connected downward to the discharge pipe 51. The conical structure can prevent the material from accumulating and blocking in the channel. One end of the discharge pipe 51 is welded to the bottom of the discharge channel, and the other end extends horizontally outward. The valve 52 is an electric butterfly valve or gate valve, which is installed on the discharge pipe 51 and electrically connected to the PLC control system. It can automatically control the opening and closing of the valve 52 according to the mixing time or the mixing uniformity detection signal to achieve accurate discharge of the mixed material.

[0031] Example 2 Based on Example 1, the present invention also provides a method for preparing a composite PET film by mixing materials, the specific steps of which are as follows: Step S1: According to the formulation requirements of the composite PET film, prepare the PET film raw materials to be mixed. Specifically, raw materials that do not require pre-mixing, such as PET chips and base resin, can be directly placed in the raw material storage silo for later use; fine raw materials that require pre-mixing, such as nano-sized silica fillers, antioxidants, and ultraviolet absorbers, should be placed separately in sealed containers for classified storage to avoid moisture or contamination.

[0032] Step S2, Feeding Structure Adjustment and Raw Material Input; Feeding Mechanism 2 Adjustment: Based on the types of raw materials that do not require pre-mixing (two different ratios of PET chips), remove the corresponding number of sealing blocks 22 (2 pieces) on the feeding cover plate 21, and install the feeding conveying pipe 23 and the conical feeding cylinder 24 into the corresponding mounting slots to ensure that the feeding conveying pipe 23 is connected to the inside of the mixing cylinder 41; Feed the raw materials that do not require pre-mixing into the corresponding conical feeding cylinder 24 respectively; After mixing the fine raw materials that require pre-mixing according to the formula ratio, feed them into the feeding pipe 33 of the primary mixing feeding structure 3, and the fine raw materials fall naturally into the primary mixing box 31 through the feeding pipe 33.

[0033] Step S3: Pre-mixing and conveying of fine raw materials; The drive unit 34 (reduction motor) of the initial mixing feed structure 3 is started, and the drive unit 34 drives the two mixing extrusion screws 36 in the initial mixing box 31 to rotate synchronously in opposite directions; Since the threads of the two mixing extrusion screws 36 are opposite and the threads mesh with each other, they can generate extrusion, shearing and axial pushing effects on the fine raw materials during rotation: the extrusion effect can break up the raw material agglomerates, the shearing effect can disperse the blocky raw materials into fine particles, and the axial pushing effect can convey the mixed raw materials to the mixing output pipe 35; The pre-mixed fine raw materials are conveyed to the mixing cylinder 41 through the mixing output pipe 35 and merged with the raw materials that do not require pre-mixing.

[0034] Step S4: Reverse double-action mixing in the main mixing area; start the motor of the drive gear sleeve 43 of the mixing device 4, and drive the gear sleeve 43 to mesh with the driven gear 42 on the outer wall of the mixing cylinder 41, causing the mixing cylinder 41 to rotate around its own axis (clockwise rotation, speed set to 20 r / min); at the same time, start the stirring motor of the mixing agitator 6, causing the rotating rod 61 and the mixing blade 62 to rotate counterclockwise (speed set to 80 r / min). Since the spiral direction of the mixing blade 62 is opposite to the spiral direction of the inner spiral guide edge 45 on the inner wall of the mixing cylinder 41, when the mixing cylinder 41 rotates, the inner spiral guide edge 45 forms a downward guiding force on the material, and the mixing blade 62 forms an upward pushing force on the material, so that the material forms an upward, downward and then upward circulating convection in the mixing cylinder 41; during the circulating convection process, the material will pass through the through hole 63 on the mixing blade 62, further realizing the dispersion and shearing of the material, avoiding uneven local mixing. The mixing time is adjusted according to the type of raw material.

[0035] Step S5: Discharge and subsequent processing of mixed materials; After the materials are mixed (observed through the window on the side wall of the mixing cylinder 41, or by detecting the uniformity of mixing through the online detection module), the electric valve 52 of the discharge mechanism 5 is opened through the PLC control system; the uniformly mixed materials in the mixing cylinder 41 enter the discharge pipe 51 through the conical discharge channel of the discharge base 46 under the action of gravity, and are transported to the subsequent pre-crystallization, drying or extrusion molding equipment by the discharge pipe 51; after the materials are discharged, the valve 52 is closed; if mixing is required, steps S1-S5 can be repeated; if the equipment needs to be cleaned, the components of the feeding mechanism 2 and the initial mixing feeding structure 3 can be disassembled to clean the mixing cylinder 41, mixing blades 62 and other components.

[0036] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composite PET film preparation mixing device, characterized in that, include: A mixing and preparation platform includes a support platform and a feeding platform. The support platform is used to support and fix the mixing equipment and the discharging mechanism. The feeding platform is located above the mixing equipment and is used to support and fix the initial mixing feeding structure and the feeding mechanism. The feeding mechanism is located on the top of the mixing equipment and is sealed to the mixing equipment through a connector; The initial mixing feeding structure is located outside the feeding mechanism, and its output end extends into the feeding mechanism; A mixing and stirring component is disposed inside the mixing equipment and is used for mixing and stirring materials; The materials to be mixed can be directly fed into the mixing equipment through the feeding mechanism, or pre-mixed through the initial feeding structure before entering the mixing equipment. After being rotated and uniformly mixed by the mixing and stirring components, they are discharged through the discharge mechanism.

2. The composite PET film preparation mixing device according to claim 1, characterized in that, The mixing equipment includes: The feeding base is fixed to the bearing platform and connected to the input end of the discharging mechanism; The mixing cylinder is rotatably connected to the feeding base at its bottom and to the feeding mechanism at its top via a rotating bearing. The driven gear is fixedly sleeved on the outer wall of the mixing cylinder; The drive gear sleeve meshes with the driven gear and is used to drive the mixing cylinder to rotate around its own axis; The inner spiral guide edge extends axially along the inner wall of the mixing cylinder.

3. A composite PET film preparation mixing device according to any one of claims 1 or 2, characterized in that, The mixing rod includes: The rotating rod is coaxially inserted inside the mixing cylinder. The hybrid blades are spirally fixed to the outer wall of the rotating rod to form a screw structure; When mixing materials, the rotation method of the rotating rod is opposite to the rotation direction of the mixing cylinder, so as to drive the materials to tumble inside the mixing cylinder.

4. The composite PET film preparation mixing device according to claim 3, characterized in that, The spiral direction of the inner spiral guide edge is opposite to that of the mixing blade. When the mixing cylinder drives the inner spiral guide edge to rotate, the inner spiral guide edge forms a downward guiding force on the material, and the mixing blade forms an upward pushing force on the material, so that the material forms an up-and-down circulating convection within the mixing cylinder.

5. The composite PET film preparation mixing device according to claim 3, characterized in that, The mixing blades are uniformly provided with several through holes along their length, through which the material passes during the circulation and convection process.

6. The composite PET film preparation mixing device according to claim 1, characterized in that, The feeding mechanism includes: The feed cover plate is in the shape of a disc that fits the top opening of the mixing equipment. Its center is fixedly connected to the end of the rotating bearing away from the mixing cylinder, and the lower surface of the feed cover plate is in contact with the top end face of the mixing cylinder to form a seal. The feed cover plate has several mounting grooves at equal angles along its circumference; a sealing block is provided in the mounting groove, and the sealing block corresponds to the mounting groove and is detachably connected. One end of the feed inlet pipe is adapted to be connected to the inner wall of the mounting groove and communicates with the inside of the mixing cylinder; A conical feeding cylinder is connected to the end of the feeding input pipe away from the mixing cylinder body; The feed conveying pipe is equipped with a conveying screw. One end of the conveying screw extends to the outer wall of the feed conveying pipe and is connected to the drive motor for quantitatively conveying the material in the conical feed cylinder to the mixing cylinder.

7. The composite PET film preparation mixing device according to claim 1, characterized in that, The initial mixing feed structure includes: The initial mixing box is fixed to the upper surface of the feeding platform; The feeding fixing plate is horizontally fixed at the top opening of the preliminary mixing box; The feed pipe passes vertically through the feed fixing plate and is connected to the interior of the preliminary mixing box. Two mixing extrusion screws are provided; the two mixing extrusion screws are arranged parallel and horizontally inside the primary mixing chamber. The mixing output pipe is connected at one end to the preliminary mixing box and at the other end to the feeding mechanism. One end of each of the two mixing extrusion screws extends to the outside of the initial mixing chamber and is connected to the drive unit for transmission.

8. The composite PET film preparation mixing device according to claim 7, characterized in that, The two mixing extrusion screws have opposite thread directions and meshing threads. Driven by the drive unit, they rotate synchronously in opposite directions to extrude, shear, and axially push the fine materials in the initial mixing box.

9. The composite PET film preparation mixing device according to claim 2, characterized in that, The top of the feeding base has an annular groove that fits the outer wall of the bottom of the mixing cylinder. The bottom of the mixing cylinder is embedded in the annular groove and rotates with the inner wall of the annular groove. The feeding base has a feeding channel inside. One end of the feeding channel is connected upward to the inside of the mixing cylinder, and the other end is connected downward to the discharge mechanism. The discharge mechanism includes a discharge pipe and a valve. One end of the discharge pipe is connected to the feeding channel, and the other end extends outward. The valve is located on the discharge pipe to control the flow of material discharge.

10. A mixing method for a composite PET film preparation mixing apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: S1. According to the requirements for preparing composite PET film, prepare the PET film raw materials to be mixed. Among them, the fine raw materials that need to be premixed are classified separately, and the raw materials that do not need to be premixed are used directly. S2. If the raw material does not require pre-mixing, it is put into the conical feeding cylinder of the feeding mechanism, and the drive motor in the feeding conveying pipe is started to drive the conveying screw to rotate, and the raw material in the conical feeding cylinder is quantitatively conveyed to the mixing cylinder of the mixing equipment; if the raw material is a fine material that needs to be pre-mixed, it is put into the feeding pipe of the primary mixing feeding structure, and the raw material enters the primary mixing box through the feeding pipe. S3. Pre-mixing of fine raw materials: The drive unit of the initial mixing feeding structure is activated. The drive unit drives the two mixing extrusion screws in the initial mixing box to rotate synchronously in opposite directions. The two mixing extrusion screws with opposite screw directions and intermeshing screws extrude, shear and push the fine raw materials axially to achieve pre-mixing of fine raw materials. The mixed fine raw materials are then transported to the mixing cylinder through the mixing output pipe. S4. Start the drive gear sleeve of the mixing equipment. The drive gear sleeve meshes with the driven gear on the outer wall of the mixing cylinder, driving the mixing cylinder to rotate around its own axis. At the same time, start the rotating rod of the mixing agitator, driving the mixing blades that are spirally wrapped around the outer wall of the rotating rod to rotate. The rotation direction of the rotating rod is opposite to the rotation direction of the mixing cylinder. When the mixing cylinder rotates, the inner spiral guide edge on its inner wall rotates together, forming a downward guiding force on the material in the mixing cylinder. The rotation of the mixing blades forms an upward pushing force on the material, so that the material forms an up-and-down circulation convection in the mixing cylinder. At the same time, the material passes through the through holes on the mixing blades during the circulation convection, further realizing the dispersion and uniform mixing of the material. S5. After the mixed material is discharged, the valve of the discharge mechanism is opened after the material is mixed. The uniformly mixed material in the mixing cylinder enters the discharge pipe through the discharge channel of the discharge base and is discharged from the discharge pipe, thus completing the mixing process for the preparation of composite PET film.

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