Preparation process of flame-retardant heat-conducting nylon composite material

Abstract

The invention discloses a preparation process of a flame-retardant heat-conducting nylon composite material, the preparation process uses a preparation device of the flame-retardant heat-conducting nylon composite material, the preparation device comprises a material mixing barrel, the outer wall of the material mixing barrel is communicated with a melting machine connecting valve, the outer side of the material mixing barrel is provided with a blanking hopper, and the top surface of the material mixing barrel is communicated with a measuring hopper; the mixing unit is arranged on the side of a connecting valve of the melting machine, the mixing unit comprises a spiral disc, a material mixing rod and a premixing unit, the premixing unit is arranged on the outer side of the mixing unit and comprises a stirring rod, a first convex block, a second convex block and a quantifying unit, the quantifying unit is arranged above a material mixing barrel, and the first convex block and the second convex block are arranged on the spiral disc. The quantifying unit comprises a quantifying disc and a pressing disc, nylon matrix raw materials, flame-retardant heat-conducting raw materials and auxiliaries can be uniformly mixed under the limitation of a material mixing barrel, and a mixture of the nylon matrix raw materials, the flame-retardant heat-conducting raw materials and the auxiliaries which are mixed can be conveyed into a melting machine under the limitation of a connecting valve of the melting machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of preparation of flame-retardant and heat-conducting nylon composite materials, and particularly relates to a preparation process of a flame-retardant and heat-conducting nylon composite material. BACKGROUND

[0002] The flame-retardant and heat-conducting nylon composite material is a multifunctional polymer material prepared by adding a flame retardant, a heat-conducting filler and necessary additives to a nylon base through a specific preparation process. The preparation process of the flame-retardant and heat-conducting nylon composite material is a systematic technical process for preparing a composite functional material with flame-retardant and heat-conducting properties and inherent mechanical properties of the nylon base by reasonably matching, pretreating, mixing and dispersing, melt blending, forming and processing and post-processing the nylon base and the flame retardant, the heat-conducting filler and various additives.

[0003] In the production process of the existing flame-retardant and heat-conducting nylon composite material, the nylon base raw material and the flame-retardant and heat-conducting raw material need to be premixed when melt blending is performed. The existing mixing device has a single mixing mode, and the functional filler is prone to form local enrichment or dispersion blind areas in the base particles, resulting in that the component distribution of the premixed material deviates from the design ratio, and finally affecting the overall performance of the flame-retardant and heat-conducting nylon composite material.

[0004] Therefore, there is a need for a preparation process of a flame-retardant and heat-conducting nylon composite material to solve the above problems. SUMMARY

[0005] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification of the present application to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the problems of the above preparation process of a flame-retardant and heat-conducting nylon composite material, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a preparation process of a flame-retardant and heat-conducting nylon composite material, which is used to solve the problem that in the production process of the existing flame-retardant and heat-conducting nylon composite material, the nylon base raw material and the flame-retardant and heat-conducting raw material need to be premixed when melt blending is performed, the existing mixing device has a single mixing mode, and the functional filler is prone to form local enrichment or dispersion blind areas in the base particles, resulting in that the component distribution of the premixed material deviates from the design ratio, and finally affecting the overall performance of the flame-retardant and heat-conducting nylon composite material.

[0008] To solve the above technical problems, the application provides the following technical scheme: a preparation process of a flame-retardant heat-conducting nylon composite material, which uses a preparation device of the flame-retardant heat-conducting nylon composite material, comprising a mixing unit, a premixing unit and a quantitative unit, and comprising the following steps: Step one: premixing stage, the nylon matrix and the flame-retardant heat-conducting raw materials enter the limiting tube through the hopper, the motor drives the spiral disc to rotate, and the material is transported upward and mixed under the constraint of the limiting tube, while the spiral disc drives the L-shaped frame and the mixing rod to rotate, further stirring the material entering the mixing barrel, and the feeding is prevented from being blocked; Step two: the raw materials according to the proportion are put into the hopper, the rotating rod is driven to rotate by the spiral disc through the transmission mechanism, the limiting sleeve, the rotating plate and the stirring rod are synchronously operated, the preliminary transportation and mixing are completed, the first protrusion and the second protrusion are extruded and separated during the rotation of the rotating plate, the stirring rod is reciprocated up and down while rotating, the mixing effect is strengthened and the blockage is prevented, and the material is smoothly transported into the limiting tube; Step three: when the additives are discharged, the quantitative disc is rotated in the quantitative hopper by the spiral disc, the quantitative discharge is realized through the alignment and misalignment of the discharge hole and the quantitative hopper, the spring pushes the pressing plate to press the additives, the additives are prevented from adhering to the inner wall, and the quantitative transportation of the additives is assisted to be completed; The mixing barrel is provided with a melting machine connecting valve in communication with the outer wall of the mixing barrel, a hopper is arranged outside the mixing barrel, and a quantitative hopper is arranged in communication with the top surface of the mixing barrel. The mixing unit is arranged on the side of the melting machine connecting valve, the mixing unit comprises a spiral disc and a mixing rod, the spiral disc rotating can transport the nylon matrix raw materials and the flame-retardant heat-conducting raw materials discharged from the hopper, and the mixing rod rotating can continue to mix the materials when the materials are transported into the mixing barrel, so that the nylon matrix raw materials and the flame-retardant heat-conducting raw materials are uniformly mixed; The premixing unit is arranged outside the mixing unit, the premixing unit comprises a stirring rod, a first protrusion and a second protrusion, the stirring rod rotating can preliminarily mix the nylon matrix raw materials and the flame-retardant heat-conducting raw materials, the stirring rod is vibrated up and down under the extrusion limitation of the first protrusion and the second protrusion, and the materials are prevented from being blocked in the hopper; Quantitative unit, the quantitative unit is placed above the mixing barrel, the quantitative unit includes a quantitative disc and a pressure disc, which can push down the additives inside the nylon matrix raw material and the flame-retardant heat-conducting raw material under the pressure limitation of the pressure disc, and realize quantitative feeding by cooperating with the rotating quantitative disc, mix the additives, the nylon matrix raw material and the flame-retardant heat-conducting raw material uniformly, under the limitation of the mixing barrel, the nylon matrix raw material and the flame-retardant heat-conducting raw material and the additives can be uniformly mixed, under the limitation of the discharge hopper, the nylon matrix raw material and the flame-retardant heat-conducting raw material can be preliminarily mixed, under the limitation of the quantitative hopper, the additives can be quantitatively fed into the mixing barrel, and under the limitation of the melting machine connecting valve, the mixed nylon matrix raw material, the flame-retardant heat-conducting raw material and the additive mixture can be transported into the melting machine.

[0009] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the mixing unit includes a limiting tube fixedly installed in the mixing barrel, a motor fixedly installed at the bottom of the limiting tube, a spiral disc fixedly installed at the output end of the motor, an L-shaped frame fixedly installed at the end of the spiral disc away from the motor, and a mixing rod fixedly installed in the inner side of the L-shaped frame.

[0010] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the spiral disc is rotationally connected to the inner side of the limiting tube, the end of the limiting tube away from the motor is in communication with the inner side of the mixing barrel, and the outer wall of the limiting tube is in communication with the discharge hopper, so that the material transported by the discharge hopper can be transported into the mixing barrel under the cooperation of the limiting tube and the spiral disc.

[0011] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the premixing unit includes a transmission mechanism fixedly sleeved on the outer wall of the spiral disc away from the motor, a rotating rod fixedly sleeved in the transmission mechanism, and a support plate rotationally connected to the outer wall of the rotating rod.

[0012] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the outer wall of the rotating rod is fixedly installed with a limiting strip, the outer wall of the limiting strip is slidably provided with a limiting sleeve, the outer wall of the limiting sleeve is fixedly installed with a rotating plate, the top surface of the rotating plate is fixedly installed with a stirring rod, the bottom of the rotating plate is fixedly installed with a first protrusion, and the top surface of the support plate is fixedly installed with a second protrusion.

[0013] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the end of the support plate is fixedly installed with the inner wall of the discharge hopper, and the rotating rod is in transmission connection with the spiral disc through the transmission mechanism, so that the spiral disc can stably drive the rotating rod to rotate through the transmission mechanism under the support of the support plate.

[0014] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the number of the stirring rods is four, which are distributed in the circumferences of the centers of the rotating rods and are limited by the first and second protrusions to make the stirring rods rotate and vibrate up and down to realize the mixing and anti-blocking feeding effects.

[0015] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the quantitative unit comprises a quantitative disc fixedly installed at the end of the spiral disc, a frame fixedly installed at the top end of the quantitative hopper, a square rod slidingly arranged in the frame, a spring sleeved on the outer wall of the square rod, and a pressure plate fixedly installed at the end of the square rod.

[0016] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the quantitative disc is slidingly arranged on the outer wall of the quantitative hopper, the quantitative disc is internally provided with a discharging hole, and the discharging hole is circumferentially distributed at the center of the quantitative disc, so that the additive in the quantitative hopper can be quantitatively discharged under the limitation of the quantitative disc.

[0017] As a preferred scheme of the preparation process of the flame-retardant heat-conducting nylon composite material, the pressure plate is slidingly arranged on the outer wall of the quantitative hopper, and the ends of the springs are fixedly installed on the inner side of the frame and the top surface of the pressure plate, so that the additive can be pushed and discharged under the cooperation of the springs and the pressure plate, and when the additive needs to be supplemented, the square rod is only pulled to disengage the pressure plate from the quantitative hopper, so that the additive can be supplemented.

[0018] The preparation process of the flame-retardant heat-conducting nylon composite material has the following advantages: when the nylon matrix raw material and the flame-retardant heat-conducting raw material are mixed, the mixture needs to be treated by the premixing unit, which can effectively prevent the feeding blockage; after the material enters the limiting pipe from the discharging hopper, the motor drives the spiral disc to rotate, and under the action of the spiral disc, the material is upwardly conveyed to the mixing barrel; meanwhile, the spiral disc drives the L-shaped frame and the mixing rod to rotate, so that the mixing and stirring of the material in the barrel are realized. During the mixing process, the two kinds of raw materials input into the discharging hopper according to the proportion are preliminarily mixed and conveyed by the limiting sleeve, the rotating plate and the stirring rod driven by the limiting strip on the outer wall of the rotating rod when the rotating plate rotates to make the first and second protrusions extrude each other; the first protrusion drives the rotating plate and the limiting sleeve to slide along the rotating rod, and the rotating plate is reset under the action of gravity when the two protrusions no longer extrude each other; the reciprocating movement of the rotating plate makes the stirring rod rotate and vibrate up and down, which ensures the mixing effect and prevents the material from being blocked, so that the material can smoothly enter the limiting pipe. When the additive is added to the mixing barrel, the rotating spiral disc drives the quantitative disc to rotate in the quantitative hopper, when the quantitative disc is aligned with the quantitative hopper, the additive falls, and when the quantitative disc is not aligned with the quantitative hopper, the additive stops falling, so that quantitative feeding is realized, and under the action of the spring elastic force, the pressure plate applies pressure to the additive in the quantitative hopper, thereby assisting the conveying of the additive and avoiding that the additive adheres to the inner wall to affect the feeding. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them: Figure 1 It is a main structure schematic diagram of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0020] Figure 2 It is a mixing unit, premixing unit and quantitative unit structure schematic diagram of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0021] Figure 3 It is a mixing unit structure schematic diagram of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0022] Figure 4 It is a mixing unit local structure schematic diagram of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0023] Figure 5 It is a premixing unit structure schematic diagram of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0024] Figure 6 It is an explosion structure schematic diagram of the premixing unit of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0025] Figure 7 It is a quantitative unit structure schematic diagram of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0026] Figure 8 It is an explosion structure schematic diagram of the quantitative unit of the preparation process of the flame-retardant heat-conducting nylon composite material.

[0027] Figure 9 It is a preparation process flow schematic diagram of the flame-retardant heat-conducting nylon composite material.

[0028] BRIEF DESCRIPTION OF DRAWINGS: 100, mixing barrel; 101, melting machine connecting valve; 102, lower hopper; 103, quantitative hopper; 200, mixing unit; 300, premixing unit; 400, quantitative unit; 201, limiting pipe; 202, motor; 203, spiral disc; 204, L-shaped frame; 205, mixing rod; 301, transmission mechanism; 302, rotating rod; 303, support plate; 304, limiting strip; 305, limiting sleeve; 306, rotating plate; 307, stirring rod; 308, first protrusion; 309, second protrusion; 401, quantitative disc; 402, frame; 403, square rod; 404, spring; 405, pressing disc. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0031] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0032] Thirdly, the present application is described in detail in conjunction with the schematic drawings, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic drawings are only examples, which should not limit the scope of protection of the present application. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture. EMBODIMENT

[0033] REFERENCE Figure 1 , Figure 2 and Figure 9 The first embodiment of the present application provides a preparation process of a flame-retardant heat-conducting nylon composite material, which uses a preparation device of a flame-retardant heat-conducting nylon composite material, including a mixing unit 200, a premixing unit 300 and a quantitative unit 400, including the following steps: Step one: premixing stage, the nylon matrix and flame-retardant heat-conducting raw materials enter the limiting tube 201 through the feed hopper 102, the motor 202 drives the spiral disc 203 to rotate, and the material is upwardly conveyed and mixed under the constraint of the limiting tube 201, at the same time, the spiral disc 203 drives the L-shaped frame 204 and the mixing rod 205 to rotate, further stirring and mixing the material entering the mixing barrel 100, and having the functions of anti-blocking and feeding; Step two: the raw materials according to the proportion are put into the feed hopper 102, the spiral disc 203 drives the rotating rod 302 to rotate through the transmission mechanism 301, the limiting sleeve 305, the rotating plate 306 and the stirring rod 307 are synchronously operated, the preliminary conveying and mixing are completed, the first protrusion 308 and the second protrusion 309 are extruded and separated during the rotation of the rotating plate 306, the stirring rod 307 is reciprocatingly vibrated up and down while rotating, the mixing effect is strengthened and the blockage is prevented, and it is ensured that the material smoothly enters the limiting tube 201; Step three: when the additives are fed, the spiral disc 203 drives the quantitative disc 401 to rotate in the quantitative hopper 103, the quantitative feeding is realized through the alignment and misalignment of the feeding hole and the quantitative hopper 103, at the same time, the spring 404 pushes the pressure plate 405 to press the additives, so as to avoid adhering to the inner wall and assist in completing the quantitative conveying of the additives; The mixing barrel 100, the melting machine connecting valve 101 is connected with the outer wall of the mixing barrel 100, the feed hopper 102 is arranged outside the mixing barrel 100, and the quantitative hopper 103 is connected with the top surface of the mixing barrel 100; The mixing unit 200 is arranged on the side of the melting machine connecting valve 101, the mixing unit 200 comprises the spiral disc 203 and the mixing rod 205, the spiral disc 203 for rotating can convey the nylon matrix raw materials and the flame-retardant heat-conducting raw materials fed from the feed hopper 102, and the mixing rod 205 for rotating can continue to mix the materials when the materials are conveyed to the inside of the mixing barrel 100, so that the nylon matrix raw materials and the flame-retardant heat-conducting raw materials are uniformly mixed; The premixing unit 300 is arranged outside the mixing unit 200, the premixing unit 300 comprises the stirring rod 307, the first protrusion 308 and the second protrusion 309, the stirring rod 307 for rotating can preliminarily mix the nylon matrix raw materials and the flame-retardant heat-conducting raw materials, and the stirring rod 307 is vibrated up and down under the extrusion and limitation of the first protrusion 308 and the second protrusion 309, so as to avoid that the materials are blocked in the feed hopper 102; The quantitative unit 400 is arranged above the mixing barrel 100, the quantitative unit 400 comprises the quantitative disc 401 and the pressure plate 405, the quantitative unit 400 can push the additives added in the nylon matrix raw materials and the flame-retardant heat-conducting raw materials downward under the pressing and limitation of the pressure plate 405, and the quantitative feeding is realized by cooperating with the rotating quantitative disc 401, so that the additives, the nylon matrix raw materials and the flame-retardant heat-conducting raw materials are uniformly mixed.

[0034] In use, under the restriction of the mixing barrel 100, the nylon base raw material and the flame-retardant heat-conducting raw material and the auxiliary agent can be uniformly mixed, under the restriction of the lower hopper 102, the nylon base raw material and the flame-retardant heat-conducting raw material can be preliminarily mixed, under the restriction of the quantitative hopper 103, the auxiliary agent can be quantitatively discharged into the mixing barrel 100, and under the restriction of the melting machine connecting valve 101, the mixed nylon base raw material, the flame-retardant heat-conducting raw material and the auxiliary agent mixture can be transported into the melting machine. Embodiment

[0035] Reference Figure 3 and Figure 4 The second embodiment of the present application is different from the previous embodiment in that the embodiment is further optimized on the basis of the above-mentioned embodiment, and the specific implementation is as follows: The mixing unit 200 comprises a limiting tube 201 fixedly installed in the mixing barrel 100, a motor 202 fixedly installed at the bottom of the limiting tube 201, a spiral disc 203 fixedly installed at the output end of the motor 202, an L-shaped frame 204 fixedly installed at the end of the spiral disc 203 away from the motor 202, and a mixing rod 205 fixedly installed in the L-shaped frame 204.

[0036] The outer wall of the spiral disc 203 is rotationally connected to the inside of the limiting tube 201, the end of the limiting tube 201 away from the motor 202 is in communication with the inside of the mixing barrel 100, and the outer wall of the limiting tube 201 is in communication with the lower hopper 102. Under the cooperation of the limiting tube 201 and the spiral disc 203, the material transported by the lower hopper 102 can be transported into the mixing barrel 100.

[0037] In use, when the flame-retardant heat-conducting nylon composite material is prepared, the nylon base raw material and the flame-retardant heat-conducting raw material need to be mixed, and the pre-mixing unit 300 is used for pre-mixing, and under the restriction of the pre-mixing unit 300, the feeding can be prevented from being blocked. The lower hopper 102 transports the material into the inside of the limiting tube 201. At this time, the motor 202 is started, and the spiral disc 203 fixedly installed at the output end of the motor 202 rotates. Since the outer wall of the spiral disc 203 is rotationally arranged in the limiting tube 201, under the restriction thereof, the material can be upwardly transported into the mixing barrel 100. Under the restriction of the rotating spiral disc 203, the nylon base raw material and the flame-retardant heat-conducting raw material can be transported and mixed. When the material falls into the mixing barrel 100, the rotating spiral disc 203 drives the L-shaped frame 204 and the mixing rod 205 to rotate, and the mixing rod 205 stirs and mixes the material in the mixing barrel 100. Embodiment

[0038] Reference Figure 5 and Figure 6 The third embodiment of the present application is different from the previous embodiment in that the embodiment is further optimized on the basis of the above-mentioned embodiment, and the specific implementation is as follows: The premixing unit 300 comprises a transmission mechanism 301 fixedly sleeved on the outer wall of the spiral disc 203 away from the motor 202, the transmission mechanism 301 is fixedly sleeved with a rotating rod 302 inside, the rotating rod 302 is rotationally connected with a support plate 303 on the outer wall, the rotating rod 302 is fixedly installed with a limiting strip 304 on the outer wall, the limiting strip 304 is slidably provided with a limiting sleeve 305 on the outer wall, the limiting sleeve 305 is fixedly installed with a rotating plate 306 on the outer wall, the rotating plate 306 is fixedly installed with a stirring rod 307 on the top surface, the rotating plate 306 is fixedly installed with a first protrusion 308 on the bottom, and the support plate 303 is fixedly installed with a second protrusion 309 on the top surface.

[0039] The end of the support plate 303 is fixedly installed with the inner wall of the feeding hopper 102, and the rotating rod 302 is drivingly connected with the spiral disc 203 through the transmission mechanism 301, so that the spiral disc 203 can stably drive the rotating rod 302 to rotate under the support of the support plate 303.

[0040] The number of the stirring rods 307 is four, which are circumferentially distributed around the center of the rotating rod 302, and can rotate and vibrate up and down under the extrusion limitation of the first protrusion 308 and the second protrusion 309, so as to realize the mixing and anti-blocking feeding effect.

[0041] In use, when the nylon matrix raw material and the flame-retardant heat-conducting raw material are mixed, the two are added into the feeding hopper 102 according to the proportion, and the material can be transported into the limiting pipe 201 under the limitation of the feeding hopper 102, the rotating spiral disc 203 drives the rotating rod 302 to rotate through the transmission mechanism 301, the rotating rod 302 stably rotates under the support of the support plate 303, the limiting strip 304 fixedly installed on the outer wall of the rotating rod 302 drives the limiting sleeve 305 to rotate, the limiting sleeve 305 drives the rotating plate 306 and the stirring rod 307 to rotate, and the nylon matrix raw material and the flame-retardant heat-conducting raw material in the feeding hopper 102 are preliminarily transported and mixed, when the first protrusion 308 and the second protrusion 309 are extruded by the rotation of the rotating plate 306, the first protrusion 308 drives the rotating plate 306 and the limiting sleeve 305 to slide on the outer wall of the rotating rod 302, and the limiting sleeve 305 and the limiting strip 304 are slidably arranged, when the first protrusion 308 and the second protrusion 309 are no longer extruded, the rotating plate 306 is reset under the action of gravity, and the stirring rod 307 rotates and reciprocatingly vibrates up and down, so as to mix the nylon matrix raw material and the flame-retardant heat-conducting raw material and prevent blocking during the feeding into the limiting pipe 201. Embodiment

[0042] Reference Figure 7 and Figure 8 The third embodiment of the present application is further optimized on the basis of the above-mentioned embodiments, and the specific embodiments are as follows: The quantitative unit 400 comprises a quantitative disc 401 fixedly installed at the end of the spiral disc 203, and the top end of the quantitative hopper 103 is fixedly installed with a frame 402, the inside of the frame 402 is slidably provided with a square rod 403, the outer wall of the square rod 403 is sleeved with a spring 404, and the end of the square rod 403 is fixedly installed with a pressing disc 405.

[0043] The quantitative disc 401 is slidably arranged at the outer wall of the quantitative hopper 103, the inside of the quantitative disc 401 is provided with a discharging hole, and the discharging hole is distributed in a circumferential direction of the center of the quantitative disc 401. Under the limitation of the quantitative disc 401, the additive in the quantitative hopper 103 can be quantitatively discharged.

[0044] The pressing disc 405 is slidably arranged at the outer wall of the quantitative hopper 103, and the end of the spring 404 is fixedly installed at the inside of the frame 402 and the top surface of the pressing disc 405. Under the cooperation of the spring 404 and the pressing disc 405, the additive can be pushed and discharged. When the additive is replenished, the square rod 403 is only pulled to make the pressing disc 405 no longer sleeved with the quantitative hopper 103, and the additive can be replenished.

[0045] In use, when the additive is discharged into the mixing barrel 100, the rotating spiral disc 203 drives the quantitative disc 401 to rotate, the quantitative disc 401 rotates in the quantitative hopper 103, and when the discharging hole in the quantitative disc 401 is aligned with the quantitative hopper 103, the additive in the quantitative hopper 103 can be discharged. When the discharging hole is no longer aligned with the quantitative hopper 103, the discharging is stopped, and the reciprocating can realize the quantitative discharging effect. Under the elastic action of the spring 404, the pressing disc 405 can be pushed, the pressing disc 405 presses and conveys the additive in the quantitative hopper 103, and the additive adhered to the inner wall of the quantitative hopper 103 is avoided to affect the discharging. The structure can quantitatively discharge the additive, and under the cooperation of the spring 404 and the pressing disc 405, the additive can be pushed and assisted to be discharged.

[0046] It should be noted that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to the existing mature technology, the electrical connection relationship and the specific circuit structure are not described here.

[0047] It should be understood that, during the development of any actual implementation, numerous implementation decisions can be made. Such development efforts, which might be complex and time-consuming, would nevertheless be of a routine nature for those of ordinary skill in the art having the benefit of this disclosure.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A process for preparing a flame-retardant and thermally conductive nylon composite material, characterized by: The preparation process uses a preparation device for a flame-retardant and heat-conductive nylon composite material, comprising: a mixing unit (200), a premixing unit (300) and a quantitative unit (400), and includes the following steps: Step 1: In the premixing stage, the nylon matrix and the flame retardant heat conductive raw material enter the limiting tube (201) through the lower hopper (102), and the motor (202) drives the spiral disk (203) to rotate. Under the constraint of the limiting tube (201), the materials are transported upward and mixed. At the same time, the spiral disk (203) drives the L-shaped frame (204) and the mixing rod (205) to rotate, further stirring and mixing the materials entering the mixing barrel (100), and also has the function of preventing blocking and feeding. Step 2: The raw materials fed into the lower hopper (102) according to the proportion are driven by the spiral disk (203) through the transmission mechanism (301) to rotate the rotating rod (302), so that the limiting sleeve (305), the rotating plate (306) and the stirring rod (307) are synchronously operated to complete the initial conveying and mixing. When the rotating plate (306) rotates, the first protrusion (308) and the second protrusion (309) are squeezed and separated, causing the stirring rod (307) to vibrate up and down while rotating, thereby enhancing the mixing effect and preventing blockage, and ensuring that the material enters the limiting tube (201) smoothly. Step 3: When the additive is discharged, the spiral disk (203) drives the quantitative disk (401) to rotate in the quantitative bucket (103), and quantitative discharge is achieved by aligning and misaligning the discharge hole with the quantitative bucket (103). At the same time, the spring (404) pushes the pressure plate (405) to press the additive to prevent it from adhering to the inner wall, thereby assisting in the quantitative delivery of the additive; A mixing barrel (100), wherein the outer wall of the mixing barrel (100) is connected to a melting machine connection valve (101), a lower hopper (102) is provided on the outer side of the mixing barrel (100), and a dosing hopper (103) is provided on the top surface of the mixing barrel (100); A mixing unit (200), the mixing unit (200) is placed on the side of the melting machine connecting valve (101), the mixing unit (200) includes a spiral disk (203) and a mixing rod (205), the rotating spiral disk (203) can convey the nylon matrix raw material and the flame retardant heat conductive raw material discharged from the discharge hopper (102), and can continue to mix the materials during the conveying process. When the spiral disk (203) conveys the materials into the mixing barrel (100), the rotating mixing rod (205) can continue to mix the materials, and evenly mix the nylon matrix raw material and the flame retardant heat conductive raw material; A premixing unit (300), the premixing unit (300) being disposed outside the mixing unit (200), the premixing unit (300) comprising a stirring rod (307), a first protrusion (308), and a second protrusion (309), wherein the rotating stirring rod (307) can preliminarily mix the nylon matrix material and the flame retardant heat conductive material, and under the extrusion restriction of the first protrusion (308) and the second protrusion (309), the stirring rod (307) is caused to vibrate up and down to prevent the material from being blocked inside the lower hopper (102); A quantitative unit (400) is placed above the mixing barrel (100). The quantitative unit (400) includes a quantitative plate (401) and a pressure plate (405). The quantitative unit (400) is used to push the additive added to the nylon matrix material and the flame retardant and thermal conductive material downward under the pressure limit of the pressure plate (405), and cooperate with the rotating quantitative plate (401) to achieve quantitative feeding, so as to uniformly mix the additive with the nylon matrix material and the flame retardant and thermal conductive material mixture.

2. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 1, wherein: A mixing unit (200) comprising a limiting tube (201) fixedly mounted inside a mixing barrel (100), a motor (202) fixedly mounted on the bottom of the limiting tube (201), a spiral disk (203) fixedly mounted on the output end of the motor (202), an L-shaped frame (204) fixedly mounted on one end of the spiral disk (203) away from the motor (202), and a mixing rod (205) fixedly mounted on the inner side of the L-shaped frame (204).

3. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 2, wherein: The outer wall of the spiral disk (203) is rotatably connected to the interior of the limiting tube (201); the end of the limiting tube (201) away from the motor (202) is connected to the interior of the mixing barrel (100); and the outer wall of the limiting tube (201) is connected to the lower hopper (102).

4. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 1, wherein: The premixing unit (300) comprises a transmission mechanism (301) fixedly sleeved on the outer wall of one end of the spiral disk (203) away from the motor (202), a rotating rod (302) fixedly sleeved inside the transmission mechanism (301), and a support plate (303) rotatably connected to the outer wall of the rotating rod (302).

5. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 4, characterized in that: A limit strip (304) is fixedly mounted on the outer wall of the rotating rod (302), a limit sleeve (305) is slidably mounted on the outer wall of the limit strip (304), a rotating plate (306) is fixedly mounted on the outer wall of the limit sleeve (305), a stirring rod (307) is fixedly mounted on the top surface of the rotating plate (306), a first protrusion (308) is fixedly mounted on the bottom of the rotating plate (306), and a second protrusion (309) is fixedly mounted on the top surface of the support plate (303).

6. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 4, characterized in that: The end of the support plate (303) is fixedly mounted on the inner wall of the lower hopper (102), and the rotating rod (302) is connected to the spiral disk (203) through a transmission mechanism (301).

7. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 5, characterized in that: There are four groups of stirring rods (307), which are distributed around the center of the rotating rod (302).

8. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 1, wherein: A quantitative unit (400) includes a quantitative disk (401) fixedly mounted on the end of a spiral disk (203), a frame (402) fixedly mounted on the top of the quantitative bucket (103), a square rod (403) slidably disposed inside the frame (402), a spring (404) sheathed on the outer wall of the square rod (403), and a pressure plate (405) fixedly mounted on the end of the square rod (403).

9. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 8, characterized in that: The outer wall of the quantitative disk (401) is slidably arranged inside the quantitative bucket (103), and the quantitative disk (401) is provided with discharge holes, which are distributed around the center of the quantitative disk (401).

10. The process for preparing a flame-retardant and thermally conductive nylon composite material according to claim 8, characterized in that: The outer wall of the pressure plate (405) is slidably arranged inside the metering bucket (103), and the ends of the spring (404) are fixedly mounted on the inner side of the frame (402) and the top surface of the pressure plate (405), respectively.

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