Flame-retardant plastic composite material preparation device

Abstract

The utility model provides a flame-retardant plastic composite material preparation device, which relates to the technical field of plastic preparation and comprises a stirring motor, a grinding pipe, a heating protective shell, an inductance coil, a rotating rod, a movable grinding disc, a static grinding seat, a stirring rod, a screw rod and a motor, the back plate is fixedly connected with the conveying pipe through a bolt; the stirring motor is connected to the upper side face of the supporting frame through bolts. The top end of the rotating rod is fixedly connected to a motor shaft of the stirring motor through a key; the movable millstone is nested on the outer side surface of the rotating rod, and the movable millstone is welded with the rotating rod; the outer side face of the static grinding base is welded to the inner side face of the grinding pipe. A stirring rod is welded and connected to the outer side surface of a rotating rod; the heating protective shell is in sliding connection with the conveying pipe; and through the arrangement of a stirring motor, a movable grinding disc, a static grinding seat and a stirring rod, flame-retardant materials are more uniformly distributed in the plastic, and the problem that plastic particles and flame-retardant compounds cannot be fully mixed in the traditional preparation process of the flame-retardant plastic is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic preparation, and more specifically, particularly relates to a device for preparing a flame-retardant plastic composite material. Background Art

[0002] Flame retardant plastic is a composite material formed by adding a compound with fire-retardant properties to a plastic matrix. Under various high temperature conditions, the flame retardant compound can decompose and release harmless gases such as water and nitrogen and form an inert protective layer, so that the plastic surface is not burned by flames. At present, the preparation of traditional flame retardant plastic products mostly adopts the extrusion molding process, that is, plastic particles and flame retardant compounds are poured into the extruder, and then the screw in the extruder drives the plastic particles and the flame retardant material to heat, grind and dissolve during the movement. It can be seen that the plastic particles and the flame retardant compound are not fully mixed during the process of pouring into the extruder, and the plastic particles and the flame retardant compound often appear in layers. During the movement and heating of the extruder, the plastic particles will not only wear the screw, but also the plastic particles and the flame retardant compound are difficult to evenly fuse together, so that the flame retardant compound in the plastic extruded by the extruder is unevenly distributed, which seriously affects the flame retardant performance of the molded product and reduces the flame retardant quality of the plastic. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a flame retardant plastic composite material preparation device to solve the problem that plastic particles and flame retardant compounds cannot be fully mixed in the preparation process of traditional flame retardant plastics.

[0004] The utility model provides a flame retardant plastic composite material preparation device, comprising a hydraulic cylinder; the hydraulic cylinder is connected to the rear side of a back plate by bolts, and the telescopic rod of the hydraulic cylinder is connected to the rear side of a shell cover by bolts; it also comprises a mixing drum, a mixing motor, a hopper, a grinding tube, a heating shell, an induction coil, an extrusion die, a rotating rod, a moving grinding disc, a static grinding seat, a mixing rod, a screw and a motor; the extrusion die is connected to the conveying tube by threads; the back plate is fixedly connected to the conveying tube by bolts; the shell cover is connected to the rear side of a baffle shell by bolts; the motor is connected to the baffle shell by bolts; the rear end of the screw is fixedly connected to the motor shaft of the motor by a key; the mixing drum is connected to the conveying tube by bolts; the bottom end of the grinding tube is welded to the upper side of the mixing drum; the The lower side of the hopper is welded and connected to the upper end of the grinding tube; the stirring motor is connected to the upper side of the support frame by bolts; the support frame is welded and connected to the hopper; the top end of the rotating rod is fixedly connected to the motor shaft of the stirring motor by a key; the moving grinding disc is nested in the outer side of the rotating rod, and the moving grinding disc is welded and connected to the rotating rod; the outer side of the static grinding seat is welded and connected to the inner side of the grinding tube; the stirring rod is welded and connected to the outer side of the rotating rod; the heating shell is slidably connected to the conveying pipe; the inductance coil is welded and connected to the heating shell, and the inductance coil is connected to the power-on interface by a wire; a through hole is provided at the center of the back plate, and the telescopic rod of the hydraulic cylinder is inserted into the through hole of the back plate; a through hole is provided on the front side of the baffle shell, and the motor shaft of the electric motor is inserted into the through hole of the baffle shell.

[0005] In at least some embodiments, a conical groove is provided on the upper side of the static grinding seat, the outer surface of the conical groove is a frosted tooth surface structure, the inclination of the conical surface of the static grinding seat is smaller than the inclination of the inclined surface of the cone of the dynamic grinding disc, and a downward through hole structure is provided at the center of the static grinding seat.

[0006] In at least some embodiments, the upper side of the movable grinding disc is a smooth conical inclined surface structure, the lower side of the movable grinding disc is a conical inclined surface structure, and the outer side of the conical structure of the movable grinding disc is a frosted tooth surface.

[0007] In at least some embodiments, the number of the stirring rods is sixteen groups, and each group of two stirring rods is a group and is cross-distributed equidistantly from top to bottom along the rotating rod.

[0008] In at least some embodiments, the number of the heating shells is three groups, each group of heating shells is a cylindrical structure that penetrates from front to back, the heating shells are nested on the outer side of the conveying pipe, the interior of the cylinder of the heating shells is hollow, and the inductance coil is embedded on the inner side of the heating shells.

[0009] In at least some embodiments, the front end of the delivery tube is provided with a threaded inner side surface, and the threaded outer side surface of the extrusion die is meshed and connected with the threaded outer side surface of the delivery tube.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. In the utility model, the grinding mechanism consisting of a moving grinding disc and a static grinding seat is driven by a stirring motor. After the plastic particles and the flame retardant compound are powdered, the stirring rod is used to fully stir and mix the plastic and the flame retardant compound, so that the flame retardant material is more evenly distributed in the plastic. This not only prevents the stratification and accumulation of plastic particles and flame retardant compounds when feeding the traditional extruder, thereby ensuring the flame retardant quality of each plastic product, but also effectively reduces the wear of the screw when the plastic moves and fuses due to the powdering of the plastic particles.

[0012] 2. In the utility model, an induction coil and a heating shell are provided. Through the nested sliding structure of three groups of heating shells and conveying pipes, the preheating and heating, dissolving and mixing of plastics and flame retardant compounds in different areas and at different temperatures in the conveying pipe are realized. The induction heating characteristics of the induction coil on the screw and the conveying pipe are utilized to make the heating temperature more accurately controllable, thereby preventing the coking of the flame retardant plastic caused by temperature deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a left-side structural schematic diagram of the utility model.

[0015] Figure 3 It is a rear view structural schematic diagram of the utility model.

[0016] Figure 4 It is a left-side sectional structural schematic diagram of the utility model.

[0017] Figure 5 It is a top view structural schematic diagram of the utility model.

[0018] Figure 6 It is a schematic diagram of the cutaway structure of the utility model.

[0019] Figure 7 The utility model Figure 4 Schematic diagram of the enlarged structure of part A in the middle.

[0020] Figure numerals: 1. hydraulic cylinder; 2. conveying pipe; 3. back plate; 4. mixing drum; 5. mixing motor; 6. hopper; 7. grinding tube; 8. heating shell; 9. inductor coil; 10. extrusion die; 11. support frame; 12. rotating rod; 13. moving grinding disc; 14. static grinding seat; 15. stirring rod; 16. screw; 17. baffle shell; 18. shell cover; 19. motor; 20. power interface. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] like Figure 1-7 As shown, the utility model provides a flame retardant plastic composite material preparation device, including a hydraulic cylinder 1; the hydraulic cylinder 1 is connected to the rear side of the back plate 3 by bolts, and the telescopic rod of the hydraulic cylinder 1 is connected to the rear side of the shell cover 18 by bolts; it also includes a mixing drum 4, a mixing motor 5, a hopper 6, a grinding tube 7, a heating shell 8, an inductor 9, an extrusion die 10, a rotating rod 12, a moving grinding disc 13, a static grinding seat 14, a stirring rod 15, a screw 16 and a motor 19; the extrusion die 10 is connected to the conveying pipe 2 by threads; the back plate 3 is fixedly connected to the conveying pipe 2 by bolts; the shell cover 18 is connected to the rear side of the baffle shell 17 by bolts; the motor 19 is connected to the baffle shell 17 by bolts; the rear end of the screw 16 is fixedly connected to the motor shaft of the motor 19 by a key; the mixing drum 4 is connected to the conveying pipe 2 by bolts; the bottom end of the grinding tube 7 is welded to the mixing drum 4 The upper side surface; the lower side surface of the hopper 6 is welded to the upper end of the grinding tube 7; the stirring motor 5 is connected to the upper side surface of the support frame 11 by bolts; the support frame 11 is welded to the hopper 6; the top end of the rotating rod 12 is fixedly connected to the motor shaft of the stirring motor 5 by a key; the moving grinding disc 13 is nested in the outer side surface of the rotating rod 12, and the moving grinding disc 13 is welded to the rotating rod 12; the outer side surface of the static grinding seat 14 is welded to the inner side surface of the grinding tube 7; the stirring rod 15 is welded to the outer side surface of the rotating rod 12; the heating shell 8 is slidably connected to the conveying pipe 2; the inductor coil 9 is welded to the heating shell 8, and the inductor coil 9 is connected to the power interface 20 by a wire; a through hole is provided at the center position of the back plate 3, and the telescopic rod of the hydraulic cylinder 1 is inserted into the through hole of the back plate 3; a through hole is provided on the front side of the baffle shell 17, and the motor shaft of the motor 19 is inserted into the through hole of the baffle shell 17.

[0023] When the utility model is preparing flame-retardant plastic, the stirring motor 5 drives the rotating rod 12 to rotate, and the rotating rod 12 synchronously drives the six groups of stirring rods 15 and the moving grinding disc 13 to rotate synchronously around the central axis of the rotating rod 12, and then pours the plastic particles and the flame-retardant compound into the hopper 6, the plastic particles and the flame-retardant compound fall on the rotating moving grinding disc 13 and fall into the gap between the moving grinding disc 13 and the static grinding seat 14 through the smooth conical surface structure on the side of the moving grinding disc 13, the plastic particles and the flame-retardant compound are squeezed and ground into powder between the moving grinding disc 13 and the static grinding seat 14, and then fall into the stirring drum 4 through the through hole at the center of the static grinding seat 14, at this time, the sixteen groups of stirring rods 15 continuously stir the powdered plastic particles and the flame-retardant compound, so that the plastic particles and the flame-retardant compound are fully mixed, and a suitable preheating position and heating are selected on the conveying pipe 2. Hot position, adjust the heating shell 8 to a suitable position, plug the external AC power supply into the power interface 20, at this time the external AC power supply transmits high-frequency AC to the inductor 9, according to Lenz's law, the inductor 9 generates a changing magnetic field and continuously cuts the metal conveying pipe 2 and the screw 16, so that small eddy currents are generated inside the conveying pipe 2 and the screw 16 and heat is generated, the hydraulic rod of the hydraulic cylinder 1 pulls the baffle shell 17 connected by the shell cover 18 bolts to move backward, so that the conveying pipe 2 is connected to the mixing drum 4, and the stirred plastic and flame retardant compound fall into the conveying pipe 2, the motor 19 drives the screw 16 to rotate, the screw 16 drives the plastic and the flame retardant compound to pass through the heating area in turn and melt and mix into a clay state, and then the screw 16 drives the clay-like flame retardant plastic to be extruded from the extrusion die 10 to complete the preparation of the flame retardant plastic.

[0024] In the disclosed embodiment, a conical groove is provided on the upper side of the static grinding seat 14, and the outer surface of the conical groove is a frosted tooth surface structure. The inclination of the conical surface of the static grinding seat 14 is smaller than the inclination of the conical inclined surface of the dynamic grinding disc 13, so that the gap between the static grinding seat 14 and the dynamic grinding disc 13 is gradually reduced from top to bottom, so that the granular plastic falls into the space between the static grinding seat 14 and the dynamic grinding disc 13 and is ground into small particles of powder. A through hole structure that penetrates downward is provided at the center of the static grinding seat 14. After grinding, the powder falls into the mixing drum 4 through the through hole of the static grinding seat 14 by gravity.

[0025] In the disclosed embodiment, the upper side surface of the movable grinding disc 13 is a smooth conical inclined surface structure, so that the plastic particles and the flame retardant compound slide along the smooth conical surface of the movable grinding disc 13 to the gap between the static grinding seat 14 and the movable grinding disc 13, thereby preventing the plastic particles from being retained and silted. The lower side surface of the movable grinding disc 13 is a conical inclined surface structure, and the outer side surface of the conical structure of the movable grinding disc 13 is a frosted tooth surface. The frosted tooth surface of the movable grinding disc 13 cooperates with the frosted tooth surface on the upper side of the static grinding seat 14 to grind the plastic particles and form plastic powder, thereby facilitating the fine mixing of the plastic particles and the flame retardant compound.

[0026] In the disclosed embodiment, there are sixteen groups of stirring rods 15 , with two groups of stirring rods 15 forming one group and equidistantly cross-distributed from top to bottom along the rotating rod 12 . The ground plastic particles are fully stirred and mixed with the flame retardant compound by the stirring rods 15 .

[0027] In the disclosed embodiment, there are three groups of heating shells 8, each group of heating shells 8 is a cylindrical structure that penetrates from front to back, the heating shells 8 are nested on the outer side of the conveying pipe 2, the interior of the cylindrical body of the heating shells 8 is hollow, and the inductance coil 9 is embedded on the inner side of the heating shells 8. The heating shells 8 can slide back and forth on the conveying pipe 2, which can not only flexibly change the heating position of the conveying pipe 2, but also realize flexible transformation of the preheating area and the heating area.

[0028] In the disclosed embodiment, the front end of the delivery tube 2 is provided with a thread on the inner side, and the thread on the outer side of the extrusion die 10 is meshed and connected with the thread of the delivery tube 2, so as to complete the rapid assembly and disassembly between the extrusion die 10 and the delivery tube 2, so that the extruder can be used with molds of different cross-sectional shapes for extrusion molding.

[0029] The installation, connection or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc., and the specific structures, models and coefficient indicators of all its components are its own technology, as long as it can achieve its beneficial effects, it can be implemented. The hydraulic cylinder 1, stirring motor 5, and electric motor 19 used above are all common components on the market. When they are bought back for use, they can be used by simply connecting them according to the instruction manual purchased together, so they will not be repeated here.

[0030] The technical solution of the present invention is not limited to the scope of the embodiments of the present invention, and the technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A flame retardant plastic composite material preparation device, comprising a hydraulic cylinder (1); the hydraulic cylinder (1) is connected to the rear side of a back plate (3) by bolts, and the telescopic rod of the hydraulic cylinder (1) is connected to the rear side of a shell cover (18) by bolts; characterized in that: The invention also comprises a mixing drum (4), a mixing motor (5), a hopper (6), a grinding tube (7), a heating protective shell (8), an inductor coil (9), an extrusion die (10), a rotating rod (12), a moving grinding disc (13), a static grinding seat (14), a mixing rod (15), a screw (16) and a motor (19); the extrusion die (10) is connected to the conveying tube (2) by means of a thread; the back plate (3) is fixedly connected to the conveying tube (2) by means of bolts; the shell cover (18) is connected to the rear side of the baffle shell (17) by means of bolts; the motor (19) is connected to the baffle shell (17) by means of bolts; the rear end of the screw (16) is fixedly connected to the motor shaft of the motor (19) by means of a key; the mixing drum (4) is connected to the conveying tube (2) by means of bolts; the bottom end of the grinding tube (7) is welded to the upper side of the mixing drum (4); the lower side of the hopper (6) is welded to the upper end of the grinding tube (7); the mixing motor (5) is screwed to the conveying tube (2) by means of a thread; the back plate (3) is fixedly connected to the conveying tube (2) by means of a bolt; the shell cover (18) is connected to the rear side of the baffle shell (17) by means of a bolt; the motor (19) is connected to the baffle shell (17) by means of a bolt; the rear end of the screw (16) is fixedly connected to the motor shaft of the motor (19) by means of a key; the mixing drum (4) is connected to the conveying tube (2) by means of bolts; the bottom end of the grinding tube (7) is welded to the upper side of the mixing drum (4); the lower side of the hopper (6) is welded to the upper end of the grinding tube (7); the mixing motor (5) is screwed to the conveying tube (2 The bolt is connected to the upper side of the support frame (11); the support frame (11) is welded to the hopper (6); the top end of the rotating rod (12) is fixedly connected to the motor shaft of the stirring motor (5) through a key; the movable grinding disc (13) is nested in the outer side of the rotating rod (12), and the movable grinding disc (13) and the rotating rod (12) are welded; the outer side of the static grinding seat (14) is welded to the inner side of the grinding tube (7); the stirring rod (15) is welded to the rotating rod ( 12); the heating protective shell (8) is slidably connected to the conveying pipe (2); the inductor coil (9) is welded to the heating protective shell (8), and the inductor coil (9) is connected to the power supply interface (20) through a wire; a through hole is provided at the center of the back plate (3) and extends from front to back, and the telescopic rod of the hydraulic cylinder (1) is inserted into the through hole of the back plate (3); a through hole is provided on the front side of the baffle shell (17), and the motor shaft of the motor (19) is inserted into the through hole of the baffle shell (17).

2. A flame retardant plastic composite material preparation device as claimed in claim 1, characterized in that: The upper side of the static grinding seat (14) is provided with a conical groove, the outer surface of the conical groove is a grinding tooth surface structure, the inclination of the conical surface of the static grinding seat (14) is smaller than the inclination of the conical inclined surface of the dynamic grinding disc (13), and a through hole structure penetrating downward is provided at the center position of the static grinding seat (14).

3. The flame retardant plastic composite material preparation device according to claim 1, characterized in that: The upper side of the movable grinding disc (13) is a smooth conical inclined surface structure, the lower side of the movable grinding disc (13) is a conical inclined surface structure, and the outer side of the conical structure of the movable grinding disc (13) is a frosted tooth surface.

4. The flame retardant plastic composite material preparation device according to claim 1, characterized in that: The number of the stirring rods (15) is sixteen groups, with two groups of stirring rods (15) forming one group and being cross-distributed equidistantly from top to bottom along the rotating rod (12).

5. The flame retardant plastic composite material preparation device according to claim 1, characterized in that: The number of the heating protective shells (8) is three groups, each group of the heating protective shells (8) is a cylindrical structure that penetrates from front to back, the heating protective shells (8) are nested on the outer side of the conveying pipe (2), the interior of the cylindrical body of the heating protective shells (8) is hollow, and the inductance coil (9) is embedded on the inner side of the heating protective shells (8).

6. The flame retardant plastic composite material preparation device according to claim 1, characterized in that: The front end of the delivery pipe (2) is provided with a thread on the inner side surface, and the thread on the outer side surface of the extrusion die (10) is meshed and connected with the thread of the delivery pipe (2).

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