Process for preparing a modified pet engineering plastic

Abstract

The application discloses a modified PET engineering plastic preparation process, which comprises the following steps: S1, raw material weighing: PET chips, nano silicon dioxide, magnesium borate whisker, coupling agent, antioxidant and lubricant are weighed separately and prepared for use; S2, raw material mixing: the raw materials in S1 are put into a mixing machine for mixing processing to obtain a mixture; S3, melt extrusion: the mixture in S2 is sent into a double-screw extruder for melt blending extrusion, drawing, water cooling, granulation and drying, and the finished product is obtained, wherein the mixing machine comprises a mixing tank, and the application relates to the technical field of engineering plastic preparation. The modified PET engineering plastic preparation process is convenient for putting the raw materials into the mixing tank, dispersing the raw materials through the first and second dispersion plates, avoiding the caking of the raw materials, and mixing the raw materials through the stirring rod, so that the mixing effect of the raw materials is improved.

Description

Technical Field

[0001] This invention relates to the field of engineering plastics preparation technology, specifically a process for preparing modified PET engineering plastics. Background Technology

[0002] Modified engineering plastics refer to plastics that have been processed through methods such as filling, blending, and reinforcement to improve their properties, including flame retardancy, strength, impact resistance, and toughness, based on general-purpose and engineering plastics. PET, as one of the most important engineering plastics, has strong vitality, primarily due to its high-performance properties achieved through modification. Secondly, the increasingly stringent requirements for high-performance products from industries such as automotive, electrical appliances, telecommunications, electronics, and machinery, coupled with the rapid development of these industries, have accelerated the process of high-performance engineering plastics, enabling them to play an increasingly important role.

[0003] In the existing technology for preparing modified PET engineering plastics, the raw materials need to be stirred and mixed. In the existing mixers, the stirring blades are rotated to stir the raw materials and mix them together. However, during the mixing process, the mixing of the fixed-form raw materials with the liquid can easily cause some solid raw materials to clump together and float on the top, which prolongs the stirring time, limits the mixing uniformity, and thus affects the quality of the modified PET engineering plastics. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a process for preparing modified PET engineering plastics, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A process for preparing modified PET engineering plastic includes the following steps:

[0007] S1. Raw material weighing: Weigh PET chips, nano silica, magnesium borate whiskers, coupling agent, antioxidant, and lubricant separately for later use;

[0008] S2, Raw material mixing: The raw materials in S1 are fed into a mixer for mixing and processing to obtain a mixture;

[0009] S3. Melt extrusion: The mixture from step S2 is fed into a twin-screw extruder for melt blending extrusion, stranding, water cooling, pelletizing, and drying to obtain the finished product;

[0010] The mixer includes a mixing tank, with multiple support frames fixedly connected to the outside of the mixing tank. A discharge pipe is fixedly connected to the lower side of the mixing tank, and a valve is installed on the outside of the discharge pipe. A cover plate is fixedly connected to the upper side of the mixing tank, and two feed pipes and a motor are fixedly connected to the upper side of the cover plate. An insulation shell is fixedly connected to the outside of the mixing tank, and a heating wire is installed on the inner side of the insulation shell. A mixing unit is installed on the lower side of the cover plate.

[0011] The mixing unit includes a control rod rotatably connected to the lower side of a cover plate. Multiple stirring rods are fixedly connected to the outer side of the lower end of the control rod. Two branch cylinders are fixedly connected to the lower side of the cover plate. Funnels are fixedly connected to the lower sides of the two branch cylinders. Discharge pipes are fixedly connected to the lower sides of the funnels. Base blocks are fixedly connected to the lower sides of both ends of the funnels. Rotating rods are rotatably connected to the upper sides of the base blocks on both sides. The upper end of the rotating rod passes through the funnel and is fixedly connected to a first dispersing plate and a first gear component. A fixing frame and a second dispersing plate are fixedly connected to the outer side of the control rod and located inside the funnel. A gear ring is fixedly connected to the outer side of the fixing frame. The second dispersing plate is located below the fixing frame.

[0012] Preferably, a fixed plate is fixedly connected to the outer side of the control rod and below the discharge pipe. A telescopic rod is fixedly connected to the upper side of the fixed plate. A movable ring is fixedly connected to the upper end of the telescopic rod. Fixed plates are fixedly connected to both the left and right sides of the movable ring. A rotating shaft is rotatably connected to the outer side of each of the fixed plates on both sides. A fixed rod is fixedly connected to the outer end of the rotating shaft. Multiple branch rods are fixedly connected to the outer side of the fixed rod. A beater plate is fixedly connected to the outer end of each branch rod.

[0013] Preferably, the upper side of the fixing plate is provided with a sliding groove, the inner side of the sliding groove is slidably connected to a slider, the upper side of the slider is fixedly connected to a vertical plate, the side of the vertical plate near the discharge pipe is fixedly connected to a rotating block one and a stop block, the outer side of the rotating block one is rotatably connected to a rotating plate, the outer side of the discharge pipe is provided with a guide groove, the inner side of the guide groove is slidably connected to a guide block, the outer side of the guide block is fixedly connected to a rotating ring, the outer side of the rotating ring is fixedly connected to a rotating block two, the rotating block two is rotatably connected to the rotating plate, the stop block is located above the rotating block one, and the outer side of the discharge pipe is fixedly connected to multiple protrusions, the stop block abuts against the protrusions.

[0014] Preferably, a spring is fixedly connected between the outer side of the slider and the inner wall of the groove.

[0015] Preferably, the guide groove is configured as a circular ring structure.

[0016] Preferably, the movable ring is slidably connected to the control rod.

[0017] Preferably, a bevel gear is fixedly connected to the outer side of the first rotating shaft, a bevel gear is meshed with the outer side of the first bevel gear, an L-shaped block is fixedly connected to the front side of the upright plate, a toothed plate is fixedly connected to the lower side of the L-shaped block, a second rotating shaft is fixedly connected to the outer side of the second bevel gear, an L-shaped block is fixedly connected to the front side of the fixed plate, the L-shaped block is rotatably connected to the second rotating shaft, and a gear component is fixedly connected to the front end of the second rotating shaft.

[0018] Preferably, the second gear component is meshed with the gear plate.

[0019] Preferably, the gear ring is meshed with the gear component.

[0020] Preferably, the lower end of the control rod passes through the outside of the funnel and the lower side of the discharge pipe.

[0021] Beneficial effects

[0022] This invention provides a process for preparing modified PET engineering plastics. Compared with existing technologies, it has the following advantages:

[0023] (1) The modified PET engineering plastic preparation process uses a mixing tank, control rod, feed pipe, branch cylinder, funnel, discharge pipe, dispersion plate one, dispersion plate two and toothed ring to facilitate the input of raw materials into the mixing tank. The raw materials are dispersed by dispersion plate one and dispersion plate two to avoid raw material agglomeration, and the raw materials are mixed by stirring rod to increase the mixing effect of raw materials.

[0024] (2) The modified PET engineering plastic preparation process uses a control rod, discharge pipe, guide groove, guide block, rotating ring, rotating plate, fixed plate, abutment block, protrusion, moving ring, fixed rod and patting plate to facilitate the repeated up and down movement of the patting plate on the fixed rod, which facilitates the patting of the floating raw materials and increases the mixing effect of the raw materials. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a cross-sectional perspective view of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 4 This is a partial cross-sectional perspective view of the hybrid unit in this invention;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6This is a partial three-dimensional structural diagram of the hybrid unit in this invention;

[0031] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0032] Figure 8 This is a three-dimensional structural diagram of the striking plate in this invention;

[0033] Figure 9 for Figure 8 A magnified view of point C in the middle.

[0034] In the diagram: 1. Mixing tank; 2. Support frame; 3. Discharge pipe; 4. Valve; 5. Cover plate; 6. Feed pipe; 7. Motor; 8. Mixing unit; 801. Control lever; 802. Stirring rod; 803. Branch cylinder; 804. Funnel; 805. Bottom block; 806. Discharge pipe; 807. Rotating rod; 808. Dispersion plate one; 809. Gear component one; 810. Dispersion plate two; 811. Fixing frame; 812. Gear ring; 813. Fixing disc; 814. Telescopic rod; 815. Moving ring; 816. Fixing plate; 817. Slide groove; 8 18. Slider; 819. Vertical plate; 820. Rotating block one; 821. Rotating plate; 822. Guide groove; 823. Guide block; 824. Rotating ring; 825. Rotating block two; 826. Abutment block; 827. Protrusion; 828. Spring; 829. Rotating shaft one; 830. Fixed rod; 831. Branch rod; 832. Beating plate; 833. Bevel gear one; 834. Bevel gear two; 835. L-shaped block one; 836. Gear plate; 837. L-shaped block two; 838. Rotating shaft two; 839. Gear component two; 9. Insulation shell; 10. Heating wire. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Please see Figure 1 - Figure 5 The present invention provides the following technical solution: a process for preparing modified PET engineering plastic, comprising the following steps:

[0038] S1. Raw material weighing: Weigh PET chips, nano silica, magnesium borate whiskers, coupling agent, antioxidant, and lubricant separately for later use;

[0039] S2, Raw material mixing: The raw materials in S1 are fed into a mixer for mixing and processing to obtain a mixture;

[0040] S3. Melt extrusion: The mixture from step S2 is fed into a twin-screw extruder for melt blending extrusion, stranding, water cooling, pelletizing, and drying to obtain the finished product.

[0041] The mixer includes a mixing tank 1, with multiple support frames 2 fixedly connected to the outside of the mixing tank 1. A discharge pipe 3 is fixedly connected to the lower side of the mixing tank 1, and a valve 4 is installed on the outside of the discharge pipe 3. A cover plate 5 is fixedly connected to the upper side of the mixing tank 1, and two feed pipes 6 and a motor 7 are fixedly connected to the upper side of the cover plate 5. An insulation shell 9 is fixedly connected to the outside of the mixing tank 1, and a heating wire 10 is installed on the inner side of the insulation shell 9. A mixing unit 8 is installed on the lower side of the cover plate 5. The heating wire 10 in the insulation shell 9 heats the raw materials in the mixing tank 1.

[0042] The mixing unit 8 includes a control rod 801, which is rotatably connected to the lower side of the cover plate 5. Multiple stirring rods 802 are fixedly connected to the outer side of the lower end of the control rod 801. Two branch cylinders 803 are fixedly connected to the lower side of the cover plate 5. Funnels 804 are fixedly connected to the lower side of the two branch cylinders 803. A discharge pipe 806 is fixedly connected to the lower side of the funnel 804. Bottom blocks 805 are fixedly connected to the lower sides of both ends of the funnel 804. A rotating rod 807 is rotatably connected to the upper side of component 5. The upper end of the rotating rod 807 passes through the funnel 804 and is fixedly connected to a dispersion plate 808 and a gear component 809 on its outer side. A fixing frame 811 and a dispersion plate 810 are fixedly connected to the outer side of the control rod 801 and the inner side of the funnel 804. A gear ring 812 is fixedly connected to the outer side of the fixing frame 811. The dispersion plate 810 is located below the fixing frame 811. The gear ring 812 is meshed with the gear component 809. In use, raw materials are fed into mixing tank 1 through two feed pipes 6. The motor 7 is started, and the motor 7 drives the control rod 801, which in turn drives the stirring rod 802 to rotate, facilitating the mixing of the raw materials. First, the raw materials enter the branch cylinder 803. The control rod 801 drives the fixed frame 811 to rotate, which in turn drives the gear ring 812 to rotate. The gear ring 812 drives the gear component 809 to rotate, which in turn drives the rotating rod 807 to rotate. The rotating rod 807 drives the dispersing plate 808 to rotate, thus dispersing the raw materials and preventing them from clumping. Then, the raw materials are fed into the funnel 804. The control rod 801 drives the dispersing plate 810 to rotate, which performs preliminary mixing of the raw materials. The raw materials are then discharged through the discharge pipe 806 and mixed again by the stirring rod 802 at the bottom to increase the uniformity of the mixture.

[0043] Example 2:

[0044] Based on Example 1, such as Figure 6 - Figure 7 As shown, a fixed plate 813 is fixedly connected to the outer side of the control lever 801 and below the discharge pipe 806. A telescopic rod 814 is fixedly connected to the upper side of the fixed plate 813. A moving ring 815 is fixedly connected to the upper end of the telescopic rod 814. Fixed plates 816 are fixedly connected to both the left and right sides of the moving ring 815. A rotating shaft 829 is rotatably connected to the outer side of each of the left and right fixed plates 816. A fixed rod 830 is fixedly connected to the outer end of the rotating shaft 829. Multiple branch rods 831 are fixedly connected to the outer side of the fixed rod 830. A beater plate 832 is fixedly connected to the outer end of each branch rod 831. A groove 817 is provided on the upper side of 816. A slider 818 is slidably connected to the inner side of the groove 817. A vertical plate 819 is fixedly connected to the upper side of the slider 818. A rotating block 820 and a stop block 826 are fixedly connected to the side of the vertical plate 819 near the discharge pipe 806. A rotating plate 821 is rotatably connected to the outer side of the rotating block 820. A guide groove 822 is provided on the outer side of the discharge pipe 806. A guide block 823 is slidably connected to the inner side of the guide groove 822. A rotating ring 824 is fixedly connected to the outer side of the guide block 823. A rotating block 825 is fixedly connected to the outer side of the rotating ring 824. The rotating block 825 and the rotating plate 826 are connected to the guide plate 826. 1. Rotary connection: Abutment block 826 is located above rotating block 820. Multiple protrusions 827 are fixedly connected to the outer side of discharge pipe 806. Abutment block 826 abuts against protrusions 827. A spring 828 is fixedly connected between the outer side of slider 818 and the inner wall of slide groove 817. Guide groove 822 is a circular structure. Moving ring 815 is slidably connected to control rod 801. Control rod 801 drives moving ring 815 to rotate. Moving ring 815 drives fixed plate 816 to rotate. Fixed plate 816 drives fixed rod 830 to rotate. Fixed rod 830 drives tapping plate 832 on branch rod 831 to rotate. The action involves the striking plate 832 stirring the raw materials, while the fixed plate 816 rotates the upright plate 819, which in turn rotates the abutment block 826. Since the abutment block 826 abuts against the protrusion 827, it causes the upright plate 819 to move horizontally. The upright plate 819 then moves the slider 818 horizontally and the rotating plate 821. The upright plate 819 also causes the moving ring 815 on the fixed plate 816 to move up and down. The fixed plate 816 then causes the striking plate 832 to move repeatedly up and down, thus agitating and dispersing the floating raw materials to prevent clumping and maintain the mixing effect.

[0045] Example 3:

[0046] Based on Example 1, such as Figure 8 - Figure 9As shown, a bevel gear 833 is fixedly connected to the outer side of the rotating shaft 829, and a bevel gear 834 is meshed with the outer side of the bevel gear 833. An L-shaped block 835 is fixedly connected to the front side of the vertical plate 819, and a toothed plate 836 is fixedly connected to the lower side of the L-shaped block 835. A rotating shaft 838 is fixedly connected to the outer side of the bevel gear 834. An L-shaped block 837 is fixedly connected to the front side of the fixed plate 816. The L-shaped block 837 is rotatably connected to the rotating shaft 838. A gear component 839 is fixedly connected to the front end of the rotating shaft 838, and the gear component 839 meshes with the toothed plate 836. The lower end of the control lever 801 passes through the outer side of the funnel 804 and... On the lower side of the discharge pipe 806, when the raw materials are being stirred, the vertical plate 819 moves left and right repeatedly. The vertical plate 819 drives the L-shaped block 835 to move left and right, which in turn drives the toothed plate 836 to move. The toothed plate 836 drives the gear component 839 to rotate, which in turn drives the rotating shaft 838 to rotate. The rotating shaft 838 drives the bevel gear 834 to rotate, which in turn drives the bevel gear 833 to rotate. The bevel gear 833 drives the rotating shaft 829 to rotate, which in turn drives the fixed rod 830 to rotate. The fixed rod 830 drives the tapping plate 832 on the branch rod 831 to rotate, so that the tapping plate 832 stirs the raw materials and increases the mixing effect of the raw materials.

[0047] Working Principle: During operation, the operator first prepares the raw materials and feeds them into the mixing tank 1 through the feed pipe 6. The raw materials then enter the branch cylinder 803. The motor 7 is started, driving the control lever 801 to rotate. Under the action of the gear ring 812 and gear component 809, the dispersing plates 808 and 810 are controlled to rotate, allowing the dispersing plate 808 to disperse the single raw material. The raw material enters the funnel 804, where the dispersing plate 810 performs preliminary mixing. Finally, the raw material is discharged into the bottom of the mixing tank 1 through the discharge pipe 806. The control lever 801 then drives the stirring rod 802 to rotate. The stirring rod 802 mixes the raw materials again, while the control rod 801 drives the tapping plate 832 on the fixed rod 830 to rotate, stirring the raw materials. Under the action of the vertical plate 819, the abutment block 826, the rotating plate 821 and the protrusion 827, it is easy to control the tapping plate 832 to move up and down repeatedly, so that the tapping plate 832 can break up the raw materials floating on the top and prevent the raw materials from clumping. At the same time, under the action of the rotating shaft 829, bevel gear 833, bevel gear 834, rotating shaft 838, gear 839 and toothed plate 836, it is easy to control the rotation of the tapping plate 832, increasing the uniformity of mixing.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for the production of a modified PET engineering plastic, characterized in that, The method comprises the following steps: S1, raw material weighing: weighing PET chips, nano-silicon dioxide, magnesium borate whisker, coupling agent, antioxidant, lubricant separately for standby; S2, raw material mixing: putting the raw materials in S1 into a mixing machine for mixing processing, to obtain a mixture; S3, melt extrusion: sending the mixture in step S2 into a double screw extruder for melt blending extrusion, drawing, water cooling, granulation, drying, to obtain a finished product; The mixing machine comprises a mixing tank (1), a plurality of support frames (2) are fixedly connected to the outer side of the mixing tank (1), a discharge pipe (3) is fixedly connected to the lower side of the mixing tank (1), a valve (4) is arranged on the outer side of the discharge pipe (3), a cover plate (5) is fixedly connected to the upper side of the mixing tank (1), two feed pipes (6) and a motor (7) are fixedly connected to the upper side of the cover plate (5), a heat preservation shell (9) is fixedly connected to the outer side of the mixing tank (1), heating wires (10) are arranged in the heat preservation shell (9), and a mixing unit (8) is arranged on the lower side of the cover plate (5); The mixing unit (8) comprises a control rod (801) rotatably connected to the lower side of the cover plate (5), a plurality of stirring rods (802) fixedly connected to the outer side of the lower end of the control rod (801), two branch cylinders (803) fixedly connected to the lower side of the cover plate (5), a funnel (804) fixedly connected to the lower sides of the two branch cylinders (803), a discharge pipe (806) fixedly connected to the lower side of the funnel (804), bottom blocks (805) fixedly connected to the lower sides of the left and right ends of the funnel (804), rotating rods (807) rotatably connected to the upper sides of the left and right bottom blocks (805), a dispersion plate one (808) and a gear one (809) fixedly connected to the upper end of the rotating rod (807) and penetrating through the funnel (804), a fixed frame (811) and a dispersion plate two (810) fixedly connected to the outer side of the control rod (801) and located in the funnel (804), a tooth ring (812) fixedly connected to the outer side of the fixed frame (811), and the dispersion plate two (810) located below the fixed frame (811). The outer side of the control rod (801) is fixedly connected with a fixed disc (813) below and fixedly connected with the discharge pipe (806), the upper side of the fixed disc (813) is fixedly connected with a telescopic rod (814), the upper end of the telescopic rod (814) is fixedly connected with a moving ring (815), the left and right sides of the moving ring (815) are fixedly connected with a fixed plate (816), the outer sides of the left and right fixed plates (816) are rotatably connected with a rotating shaft one (829), the outer end of the rotating shaft one (829) is fixedly connected with a fixed rod (830), the outer side of the fixed rod (830) is fixedly connected with a plurality of branch rods (831), the outer end of the branch rod (831) is fixedly connected with a beating plate (832), the upper side of the fixed plate (816) is provided with a sliding groove (817), the inner side of the sliding groove (817) is slidably connected with a sliding block (818), the upper side of the sliding block (818) is fixedly connected with a vertical plate (819), one side of the vertical plate (819) close to the discharge pipe (806) is fixedly connected with a rotating block one (820) and a resisting block (826), the outer side of the rotating block one (820) is rotatably connected with a rotating plate (821), the outer side of the discharge pipe (806) is provided with a guide groove (822), the inner side of the guide groove (822) is slidably connected with a guide block (823), the outer side of the guide block (823) is fixedly connected with a rotating ring (824), the outer side of the rotating ring (824) is fixedly connected with a rotating block two (825), the rotating block two (825) is rotatably connected with the rotating plate (821), the resisting block (826) is above the rotating block one (820), the outer side of the discharge pipe (806) is fixedly connected with a plurality of protruding blocks (827), and the resisting block (826) abuts against the protruding block (827). The outer side of the rotating shaft one (829) is fixedly connected with a bevel gear one (833), the outer side of the bevel gear one (833) is meshingly connected with a bevel gear two (834), the front side of the vertical plate (819) is fixedly connected with an L-shaped block one (835), the lower side of the L-shaped block one (835) is fixedly connected with a toothed plate (836), the outer side of the bevel gear two (834) is fixedly connected with a rotating shaft two (838), the front side of the fixed plate (816) is fixedly connected with an L-shaped block two (837), the L-shaped block two (837) is rotatably connected with the rotating shaft two (838), the front end of the rotating shaft two (838) is fixedly connected with a gear part two (839), the gear part two (839) is meshingly connected with the toothed plate (836), and the toothed ring (812) is meshingly connected with the gear part one (809).

2. The process for preparing a modified PET engineering plastic according to claim 1, characterized in that: The outer side of the sliding block (818) and the inner wall of the sliding groove (817) are fixedly connected with a spring (828).

3. The process for preparing a modified PET engineering plastic according to claim 1, characterized in that: The guide groove (822) is in a circular ring structure.

4. The process for preparing a modified PET engineering plastic according to claim 1, characterized in that: The moving ring (815) is slidably connected with the control rod (801).

5. The process for preparing a modified PET engineering plastic according to claim 1, characterized in that: The lower end of the control rod (801) penetrates through the outer side of the funnel (804) and the lower side of the discharge pipe (806).

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