Forming device and method for master batch production

Abstract

The invention discloses a forming device and method for master batch production, the forming device comprises a mixing bin, a recycling mechanism is arranged at the position, close to the top, of the mixing bin, and various mixed dust raw materials in the mixing bin are separated, classified and recycled so as to be reused; a first motor is arranged at the bottom of the mixing bin, stirring is performed through stirring teeth connected with the first motor, and a heater is arranged at the bottom of the mixing bin to heat the mixing bin; an image processing module of the dust raw material particle size detection system is used for processing an image in an air guide pipe, and raw material dust is rapidly separated and is convenient to recycle; excessive gas in the screw cylinder can be quickly discharged through the degassing mechanism arranged below the screw cylinder, so that the influence of the gas in the screw cylinder on the master batch is reduced, and the size uniformity of the master batch is improved; and by arranging the shearing mechanism, the cutter is rapidly cooled, the cutter is prevented from being heated to adhere to and pull master batches, and the situation that the master batches are not uniform in length is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic masterbatch manufacturing, and in particular relates to a molding device and method for masterbatch production. Background Art

[0002] Plastic masterbatch is a concentrate made by adding an abnormal amount of plastic additives to the resin. It is generally made of calcium carbonate, talc, kaolin, wollastonite, fly ash, glass beads, etc., which can be used as fillers, coupling agents or cross-linking agents, oligomers and dispersants, copolymers or compatibilizers. It is made through multiple processes such as raw material weighing, proportioning and mixing, and extrusion.

[0003] In the actual production process, when the raw materials are proportioned and mixed, there are always some raw material particles floating in the air of the mixing bin due to the rotation of the mixer, which cannot be completely absorbed and mixed, and even overflow from the feed port, causing a certain amount of waste; and the current extruder generally adopts a closed structure. When adding materials, an air barrier may be formed due to the feeding gap, resulting in uneven extrusion and uneven discharge thickness. When the extruder is heated, the air in the raw material will produce a cavitation effect, causing the finished masterbatch to bubble, the masterbatch to be uneven in thickness and other quality problems, seriously affecting the production quality of the masterbatch; and when the masterbatch is currently cut, due to the long-term friction between the cutter and the masterbatch, heat will be generated, which will cause adhesion and pulling with the masterbatch during cutting, and the length and size of the finished masterbatch will be uneven. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a forming device and method for masterbatch production. The image in the air duct is processed by the image processing module of the dust raw material particle size detection system to obtain the particle size of the raw material dust. The appropriate filter screen is replaced according to the size of the raw material dust particle size to quickly separate the raw material dust for easy recycling. The degassing mechanism arranged under the screw barrel can quickly discharge the excess gas in the screw barrel, reduce the impact of the gas in the screw barrel on the masterbatch, and improve the size uniformity of the masterbatch. The shearing mechanism is set to quickly cool the cutter to prevent it from heating up and sticking to and pulling the masterbatch, effectively reducing the uneven length of the masterbatch.

[0005] The present invention provides the following technical solutions:

[0006] A forming device for masterbatch production includes a mixing chamber, wherein a recovery mechanism is provided near the top of the mixing chamber to separate and classify various mixed dust raw materials in the mixing chamber for recycling; a first motor is provided at the bottom of the mixing chamber, and stirring teeth connected to the first motor are used for stirring; a heater is provided at the bottom of the mixing chamber to heat the mixing chamber;

[0007] A feeding pipe is connected to a position near the bottom of the mixing bin, and the other end of the feeding pipe is connected to an extrusion mechanism, which includes a screw barrel, one end of which is provided with a second motor, and an output end of the second motor is connected to a screw, which is matched and arranged inside the screw barrel; a degassing mechanism is provided below the screw barrel, and the degassing mechanism includes a sealing cylinder, a first piston plate is provided in the sealing cylinder, and the first piston plate reciprocates in the sealing cylinder to discharge the gas in the sealing cylinder promptly and quickly;

[0008] The discharge end of the extrusion mechanism is provided with a shearing mechanism, which includes a sealing box and a cutter. The cutter is arranged on the side of the sealing box. The sealing box is provided with multiple air blowing ports on one side of the cutter. The air blowing ports are arranged in an array, and the cutter is blown and cooled through the air blowing ports.

[0009] Preferably, a large gear is further provided on the output shaft of the second motor, and the large gear is arranged on the outside of the screw barrel. The large gear is meshed with a small gear, and the small gear is driven by a transmission rod. The other end of the transmission rod is connected to a cam, and the cam is matched with the first telescopic rod. A slide is provided below the first telescopic rod, and the first telescopic rod is slidably connected to the slide.

[0010] Preferably, a breathable cavity is provided on the side of the screw barrel close to the sealing cylinder, and a plurality of breathable holes are provided between the breathable cavity and the screw; a first air intake mechanism and a second air intake mechanism are provided on the side of the sealing cylinder close to the breathable cavity, and the first air intake mechanism and the second air intake mechanism are arranged near the two ends of the sealing cylinder, and the first air intake mechanism and the second air intake mechanism realize one-way ventilation from the breathable cavity to the inside of the sealing cylinder; a first exhaust mechanism and a second exhaust mechanism are provided on the side of the sealing cylinder away from the breathable cavity, and the first exhaust mechanism and the second exhaust mechanism are arranged near the two ends of the sealing cylinder, and the first exhaust mechanism and the second exhaust mechanism realize one-way ventilation from the inside to the outside of the sealing cylinder.

[0011] Preferably, the first air intake mechanism and the second air intake mechanism, the first exhaust mechanism and the second exhaust mechanism have the same structure and all include a box body, the box body is arranged on the inner and outer sides of the sealing cylinder, the box body is located at the outer end of the sealing cylinder with at least one first air guide hole, the sealing cylinder is provided with a through hole, a moving rod is provided in the through hole, a spring is sleeved on the moving rod, one end of the spring is connected to the inner wall of the box body, the other end of the spring is connected to the moving rod, one end of the moving rod is connected to a baffle, and the baffle can be sealed and crimped with the through hole; the box body is located at the inner end of the sealing cylinder with at least one second air guide hole.

[0012] Preferably, the recovery mechanism includes an air duct and a shell, one end of the air duct is connected to a mixing bin, and the other end of the duct is connected to the shell, an industrial camera and an optical element are provided in the air duct, and the optical element is a lighting lamp for illuminating the air duct; an exhaust fan is provided at one end of the shell away from the air duct, a first filter and a second filter are provided in sequence inside the shell, and a third filter is provided on the inside of the exhaust fan; the apertures of the first filter, the second filter and the third filter decrease in sequence, and the first filter, the second filter and the third filter are all movably connected to the shell for easy replacement.

[0013] Preferably, the discharge end of the screw barrel is connected to a discharge tray, which is a porous structure. A shearing mechanism is provided on the discharge side of the discharge tray. The shearing mechanism includes a cutter, which is located on one side of the discharge tray and cuts from the side.

[0014] Preferably, a telescopic rod is connected to one side of the sealing box, and the telescopic rod is connected to a cylinder; two second telescopic rods are symmetrically connected to the ends of the cylinder, the second telescopic rods are arranged to pass through the sealing box, the second telescopic rods are slidingly connected to the sealing box gap, the other end of the second telescopic rod is connected to a second piston plate, two partitions are provided inside the sealing box, a compression chamber is formed between the partition and the sealing box, an air chamber is formed between the two partitions, and the multiple blowing ports are connected to the device chamber.

[0015] Preferably, the second piston plate is sealingly and slidingly connected to the inner wall of the compression chamber, an air inlet is provided on a side of the compression chamber away from the telescopic cylinder, and an air guide port is provided on a side of the partition away from the telescopic cylinder.

[0016] Preferably, the air inlet is located on the inner side of the compression chamber and is provided with an air inlet valve, and the air inlet valve is rotatably connected to the inner wall of the sealing box through a hinge; the expiration port is located on one side of the air chamber and is provided with an air guide valve, and the air guide valve is rotatably connected to the partition through a hinge.

[0017] Preferably, it also includes a dust raw material particle size detection system, which includes an industrial camera. The industrial camera takes pictures of the air duct illuminated by a lighting lamp, transmits the taken images to a single-chip microcomputer, and processes them through an image processing module set by the single-chip microcomputer to obtain the particle size of the raw material dust. According to the size of the raw material dust particle size, a suitable filter is replaced to quickly separate the raw material dust for easy recycling; the image processing process includes: image acquisition, preprocessing, motion restoration, background removal, image enhancement, grayscale calculation, and obtaining the particle size.

[0018] Preferably, the production method using the production molding device comprises the following steps:

[0019] Step 1: Add the proportioned raw materials into the mixing chamber through the feed port. After the mixing chamber is heated and stirred to mix evenly, the mixed raw materials are fed into the extrusion mechanism through the feed pipe;

[0020] Step 2: After the raw materials in the mixing bin are mixed, turn on the lighting and use an industrial camera to take a picture of the raw material powder remaining in the air duct. The captured image is transmitted to the single-chip microcomputer. The image processing module of the single-chip microcomputer analyzes and processes the image to obtain the particle size of the raw material dust. According to the size of the raw material dust particle size, replace the appropriate filter screen, turn on the exhaust fan, and quickly separate the raw material dust for easy recycling.

[0021] Step 3: The mixed material enters the screw barrel, and the second motor drives the screw to extrude the material. During the extrusion, the large gear drives the small gear, which in turn drives the cam, the first telescopic rod, and the first piston plate to reciprocate, and the excess gas in the screw barrel is quickly discharged from the screw barrel through the air vent, the air cavity, the first air intake mechanism, the second air intake mechanism, the first exhaust mechanism, and the second exhaust mechanism to prevent the excess gas from affecting the quality of the masterbatch;

[0022] In step 4, after the mixed material is extruded by the extrusion mechanism, it is formed into strips through the discharge tray, and finally sheared by the shearing mechanism to form particles, and finally cooled to form master batches; during shearing, the telescopic cylinder drives the second telescopic rod and the second piston block to reciprocate in the compression chamber each time it is extended and reciprocated for cutting. During the reciprocating motion, the air is quickly compressed into the air chamber, and the pressure in the air chamber increases, so that the gas in the chamber is quickly blown from the air port to the cutter, which effectively cools the cutter to prevent the cutter temperature from being too high and forming adhesion when cutting the master batch.

[0023] In addition, a degassing mechanism is arranged below the screw barrel and is connected to the air-permeable cavity through a plurality of air holes. When the first piston plate moves in the sealed cylinder, when the first piston plate moves to the right, the first air inlet mechanism is in an open state due to the negative pressure, and the gas in the air-permeable cavity is sucked into the sealed cylinder. When the first piston plate is pushed to the right, the gas in the internal box body enters the sealed cylinder body from the second guide hole, so that a negative pressure is formed in the box body. The baffle moves downward under the action of the negative pressure, pulling the spring downward. At this time, a passage is formed in the through hole, and the excess gas in the screw barrel passes through After the air in the airtight container is closed, the air in the airtight container is opened, and the air in the airtight container is opened, so that the air in the airtight container is opened, and the airtight container is opened, so that the airtight container is opened, and the airtight container is opened, so that the airtight container is opened, and the airtight container is opened. The gas in the body is quickly discharged to the outside from the second exhaust mechanism; when the first piston plate moves to the left, the principle is the same as above, the first air intake mechanism is closed by pressure, the second air intake mechanism is opened by negative pressure, the first exhaust mechanism is opened by pressure, and the second exhaust mechanism is closed by negative pressure. At this time, the excess gas in the barrel passes through the air permeable cavity, and the second air intake mechanism and the first exhaust mechanism are quickly discharged, thereby effectively preventing the excess gas in the barrel from forming an air partition, resulting in uneven masterbatch thickness, and at the same time preventing cavitation effect, forming bubbles, and affecting the production quality of masterbatch; in order to further improve the exhaust rate, prevent the air pressure in the sealed cylinder from being too high or too low, the air pressure is too high and easily causes the exhaust to be blocked, and the sealed cylinder is in danger of bursting, the air pressure is too low, the pressure and negative pressure formed are not enough to drive the baffle and spring to move, affecting normal exhaust, the air pressure P in the sealed cylinder and the elastic force f of the spring, the radius r1 of the first air guide hole and the second air guide hole, and the radius r2 of the through hole satisfy: P = α·f / π(r1+r2) 2 In the above formula, the unit of P is MPa; the unit of f is N; the units of r1 and r2 are cm; α is the pressure coefficient, which ranges from 0.56 to 2.33. In order to further improve the exhaust effect, the pressure F at the screw outlet is related to the feed volume q, the screw speed n, the movement speed v of the material in the screw, and the internal tension σ of the material to meet the following relationship: F = β·(ng / v) 1 / 2 +σ; In the above formula, β is the relationship coefficient, ranging from 2.57 to 12.65; F is in N; n is in rpm; g is in g / min; and v is in cm / min. The above formula only performs calculations.

[0024] In addition, when the shearing mechanism is shearing, the cylinder drives the telescopic cylinder to cut while the second telescopic rod fixed on the cylinder drives the second piston block to move in the compression chamber. When the second piston block moves to the right, the air inlet valve of the air inlet is opened by the negative pressure, and the external gas enters the compression chamber. The air guide valve of the air guide port is closed by the negative pressure to prevent the gas in the air chamber from being drawn into the compression chamber; when the second piston block moves to the right, the air inlet valve of the air inlet is closed by the pressure, and the air guide valve of the air guide port is opened by the pressure, and the gas in the compression chamber enters the air chamber through the air guide port. After repeated compression actions, the pressure in the chamber increases, and the gas in the air chamber is quickly blown out from the air blow port and blown towards the cutter, effectively cooling the temperature of the cutter; in order to further improve the cooling effect, ensure the effective cooling of the cutter and prevent the cutter temperature from being too high, the temperature T of the cutter and the gas flow rate V of the air blow port, the pressure p in the air chamber, and the radius R of the air blow port satisfy the following relationship: T=δ·(AπR 2 ) / (V+p); In the above formula, δ is the temperature adjustment coefficient, ranging from 1.22 to 8.62; A is the number of air ports; R is in cm; T is in °C; V is in ml / min; and p is in MPa. The above formula only performs calculations.

[0025] In addition, during the image processing and image enhancement process of the dust raw material particle size detection system, holes may appear in the image after threshold segmentation or the particles themselves may have holes due to the surface imbalance and uneven reflection of the dust particles. These holes are not conducive to obtaining the characteristic information of the particles and affect the accuracy of the particle size judgment. In order to reduce the influence of the holes, the scan line seed filling method is used to fill them, which effectively improves their influence. Specifically, the first step is to select any point (x, y) inside the image boundary as the seed point and store the point in an empty stack set in advance. The second step is to pop the seed point when the stack is not zero and define it as the scan line y. When the stack is zero, the stack ends. The third step is to fill the area inside the boundary in turn from the left and right directions of the scan line y, and the coordinates of the leftmost and rightmost ends are [X L ,X R ]; Step 4, finally search for the scan line adjacent to the scan line [X L ,X R ] range, if there is a filling area, save the rightmost image and make it a new seed point, then repeat the second step until the filling is completed. Through the above method, the influence of holes on the judgment of particle size is reduced and the accuracy of measurement is improved. For the calculation of particle size, after the edge detection and positioning of the particles and the filling of the holes, the area S of the particles can be obtained, and the diameter d of the particles satisfies, d = B / K·(4A / π). In the above formula, B is the area of each pixel in the image, K is the imaging magnification, and A is the area of the raw dust particles.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention provides a forming device and method for masterbatch production. The image processing module of the dust raw material particle size detection system processes the image in the air duct to obtain the particle size of the raw material dust. The appropriate filter screen is replaced according to the size of the raw material dust particle size to quickly separate the raw material dust for easy recycling.

[0028] (2) The present invention provides a molding device and method for masterbatch production. The degassing mechanism is set up to quickly discharge the excess gas in the screw barrel through the air-permeable cavity, the second air intake mechanism, and the first exhaust mechanism, thereby effectively preventing the excess gas in the screw barrel from forming an air partition, resulting in uneven masterbatch thickness. At the same time, it prevents the cavitation effect and the formation of bubbles, which affects the production quality of the masterbatch, and improves the size uniformity of the masterbatch.

[0029] (3) The present invention provides a forming device and method for producing masterbatch. Through the shearing mechanism, the gas in the compression chamber enters the air chamber through the air guide port. After repeated compression, the pressure in the chamber increases, and the gas in the air chamber is quickly blown out from the air port and blown toward the cutter, which effectively cools the temperature of the cutter to prevent it from heating up and sticking to and pulling the masterbatch, thereby effectively reducing the uneven length of the masterbatch strips.

[0030] (4) The present invention provides a forming device and method for masterbatch production, which fills the holes in the image by a scanning line seed filling method, effectively improving the impact thereof, facilitating the acquisition of characteristic information of the particles, and improving the accuracy of the judgment of the particle size and area.

[0031] (5) The present invention provides a forming device and method for masterbatch production, which further improves the exhaust rate by limiting the relationship between the air pressure in the sealing cylinder and the elastic force of the spring, the radius of the first air guide hole, the second air guide hole, and the radius of the through hole, thereby preventing the air pressure in the sealing cylinder from being too high or too low. Excessive air pressure can easily cause poor exhaust and the sealing cylinder is in danger of bursting. Excessive air pressure may cause insufficient pressure and negative pressure to drive the baffle and the spring to move, affecting normal exhaust.

[0032] (6) The present invention provides a forming device and method for masterbatch production, which further improves the cooling effect by limiting the relationship between the temperature of the cutter and the gas flow rate of the blow port, the pressure in the air chamber, and the radius of the blow port, thereby ensuring effective cooling of the cutter and preventing the cutter temperature from being too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 It is a schematic diagram of the recovery mechanism of the present invention.

[0036] Figure 3 It is a schematic diagram of the extrusion mechanism of the present invention.

[0037] Figure 4 It is a schematic diagram of the degassing mechanism of the present invention.

[0038] Figure 5 It is a partially enlarged schematic diagram of the degassing mechanism of the present invention.

[0039] Figure 6 It is a schematic diagram of the shearing mechanism of the present invention.

[0040] Figure 7 It is a schematic diagram of the interior of the sealed box of the present invention.

[0041] Figure 8 It is a structural schematic diagram of the air blowing port of the present invention.

[0042] Figure 9 It is a block diagram of the dust raw material particle size detection system of the present invention.

[0043] Figure 10 It is a flow chart of the image processing method of the present invention. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0046] Example 1:

[0047] Please refer to Figure 1-2 A molding device for masterbatch production includes a mixing bin 1. A recovery mechanism 4 is provided near the top of the mixing bin 1 to separate and classify various mixed dust raw materials in the mixing bin 1 for recycling. A first motor 2 is provided at the bottom of the mixing bin 1, and stirring teeth 3 connected to the first motor 2 are used for stirring. A heater is provided at the bottom of the mixing bin 1 to heat the mixing bin 1.

[0048] A feeding pipe 6 is connected to the mixing bin 1 near the bottom, and the other end of the feeding pipe 6 is connected to an extrusion mechanism 7, which includes a screw barrel 71. One end of the screw barrel 71 is provided with a second motor 72, and the output end of the second motor 72 is connected to a screw 73, which is matched and arranged inside the screw barrel 71; a degassing mechanism is provided below the screw barrel 71, and the degassing mechanism includes a sealing cylinder 713, and a first piston plate 712 is provided in the sealing cylinder 713. The first piston plate 712 reciprocates in the sealing cylinder 713 to discharge the gas in the sealing cylinder 713 in a timely and rapid manner;

[0049] The recovery mechanism 4 includes an air duct 41 and a shell 42. One end of the air duct 41 is connected to the mixing bin 1, and the other end of the duct is connected to the shell 42. An industrial camera 43 and an optical element are provided in the air duct 41. The optical element is a lighting lamp for illuminating the air duct 41; an exhaust fan 44 is provided at one end of the shell 42 away from the air duct 41, and a first filter 45 and a second filter 46 are provided in sequence inside the shell 42, and a third filter 47 is provided on the inside of the exhaust fan 44; the apertures of the first filter 45, the second filter 46, and the third filter 47 decrease in sequence, and the first filter 45, the second filter 46, and the third filter 47 are all movably connected to the shell 42 for easy replacement.

[0050] The production method using the production molding device comprises the following steps:

[0051] Step 1: Add the proportioned raw materials into the mixing chamber 1 through the feed port 5. After the mixing chamber 1 is heated and stirred to mix evenly, the mixed raw materials are fed into the extrusion mechanism 7 through the feed pipe 6;

[0052] Step 2: After the raw materials in the mixing bin 1 are mixed, the lighting is turned on, and the industrial camera 43 is used to take a picture of the raw material powder remaining in the air duct 41. The captured image is transmitted to the single-chip microcomputer, and the image processing module of the single-chip microcomputer analyzes and processes the image to obtain the particle size of the raw material dust. According to the size of the raw material dust particle size, a suitable filter is replaced, and the exhaust fan 44 is turned on to quickly separate the raw material dust for easy recycling;

[0053] Step 3: The mixed material enters the screw barrel 71, and the second motor 72 drives the screw 73 to extrude the material. During the extrusion, the large gear 74 drives the small gear 75, which in turn drives the cam 79, the first telescopic rod 710, and the first piston plate 712 to reciprocate, and the excess gas in the screw barrel 71 is quickly discharged from the screw barrel 71 through the air vent 76, the air cavity 77, the first air intake mechanism 714, the second air intake mechanism 715, the first exhaust mechanism 716, and the second exhaust mechanism 717 to prevent the excess gas from affecting the quality of the masterbatch.

[0054] In step 4, after the mixed material is extruded by the extrusion mechanism 7, it is formed into strips through the discharge tray 8, and finally sheared by the shearing mechanism 9 to form particles, and finally cooled to form master batches; during shearing, the telescopic cylinder 13 drives the second telescopic rod 93 and the second piston plate 94 to reciprocate in the compression chamber 97 each time it is extended and reciprocated for cutting. During the reciprocating motion, the air is quickly compressed into the air chamber 98, and the pressure in the air chamber 98 increases, so that the gas in the chamber is quickly blown from the blowing port 11 to the cutter 10, effectively cooling the cutter 10 to prevent the cutter 10 from being too hot and forming adhesions when cutting the master batch.

[0055] Example 2:

[0056] Please refer to Figure 3-5 On the basis of the first embodiment, a shearing mechanism 9 is provided at the discharge end of the extrusion mechanism 7. The shearing mechanism 9 includes a sealing box 91 and a cutter 10. The cutter 10 is arranged on the side of the sealing box 91. The sealing box 91 is provided with a plurality of blowing ports 11 on one side of the cutter 10. The blowing ports 11 are arranged in an array, and the cutter 10 is cooled by blowing air through the blowing ports 11.

[0057] A large gear 74 is also provided on the output shaft of the second motor 72. The large gear 74 is arranged on the outside of the screw barrel 71. The large gear 74 is meshed with a small gear 75. The small gear 75 is driven by a transmission rod 78. The other end of the transmission rod 78 is connected to a cam 79. The cam 79 is matched with a first telescopic rod 710. A slide 711 is provided below the first telescopic rod 710. The first telescopic rod 710 is slidably connected to the slide 711.

[0058] A ventilation cavity 77 is provided on the side of the screw barrel 71 close to the sealing cylinder 713, and a plurality of ventilation holes 76 are provided between the ventilation cavity 77 and the screw rod 73; a first air intake mechanism 714 and a second air intake mechanism 715 are provided on the side of the sealing cylinder 713 close to the ventilation cavity 77, and the first air intake mechanism 714 and the second air intake mechanism 715 are arranged near the two ends of the sealing cylinder 713, and the first air intake mechanism 714 and the second air intake mechanism 715 realize one-way ventilation from the ventilation cavity 77 to the sealing cylinder 713; a first exhaust mechanism 716 and a second exhaust mechanism 717 are provided on the side of the sealing cylinder 713 away from the ventilation cavity 77, and the first exhaust mechanism 716 and the second exhaust mechanism 717 are arranged near the two ends of the sealing cylinder 713, and the first exhaust mechanism 716 and the second exhaust mechanism 717 realize one-way ventilation from the inside to the outside of the sealing cylinder 713.

[0059] The first air intake mechanism 714 and the second air intake mechanism 715, the first air exhaust mechanism 716 and the second air exhaust mechanism 717 have the same structure and all include a box body 7141. The box body 7141 is arranged on the inner and outer sides of the sealing cylinder 713. The box body 7141 is located at the outer end of the sealing cylinder 713 and is provided with at least one first air guide hole 7142. The sealing cylinder 713 is provided with a through hole 7143. A moving rod 7144 is provided in the through hole 7143. A spring 7145 is sleeved on the moving rod 7144. One end of the spring 7145 is connected to the inner wall of the box body 7141, and the other end of the spring 7145 is connected to the moving rod 7144. One end of the moving rod 7144 is connected to a baffle 7146, and the baffle 7146 can be sealed and pressed with the through hole 7143; the box body 7141 is located at the inner end of the sealing cylinder 713 and is provided with at least one second air guide hole 7147.

[0060] The degassing mechanism provided at the bottom of the screw barrel 71 is connected to the air-permeable cavity 77 through a plurality of air holes 76. When the first piston plate 712 moves in the sealing cylinder 713, when the first piston plate 712 moves to the right, the first air inlet mechanism 714 is in an open state due to the negative pressure, and the gas in the air-permeable cavity 77 is drawn into the sealing cylinder 713. When the first piston plate 712 is pushed to the right, the gas in the internal box body 7141 enters the sealing cylinder 713 from the second guide hole, so that a negative pressure is formed in the box body 7141. The baffle 7146 moves downward under the action of the negative pressure, pulling the spring 7145 downward. At this time, the through hole 7143 forms a passage, and the plurality of air holes in the screw barrel 71 are The remaining gas enters the air cavity 77 through the air vent 76, and then enters the interior of the sealing cylinder 713 through the first air guide hole 7142, the through hole 7143, and the second air guide hole 7147; at this time, the second air intake mechanism 715 is in a closed state due to the action of the air pressure in the sealing cylinder 713. The closed state is: the gas in the sealing cylinder 713 enters the internal box body 7141 through the second air guide hole 7147, so that the pressure in the box body 7141 increases, and at the same time, it is affected by the restoring force of the spring 7145, driving the baffle 7146 to press the sealing cylinder 713, and the through hole 7143 forms a closed circuit; at the same time, the first exhaust mechanism 716 is closed under the action of negative pressure When the first piston plate 712 moves to the left, the principle is the same as above. The first air inlet mechanism 714 is in a closed state under pressure, and the second air inlet mechanism 715 is in an open state under negative pressure. The first exhaust mechanism 716 is in an open state under pressure, and the second exhaust mechanism 717 is in a closed state under negative pressure. At this time, the excess gas in the screw barrel 71 passes through the air permeable cavity 77, and the second air inlet mechanism 715 and the first exhaust mechanism 716 are quickly discharged, thereby effectively preventing the excess gas in the screw barrel 71 from forming an air partition, resulting in the mother In order to further improve the exhaust rate and prevent the air pressure in the sealing cylinder 713 from being too high or too low, excessive air pressure may easily cause the exhaust to be blocked and the sealing cylinder 713 may burst, while excessive air pressure may form a pressure and negative pressure that are insufficient to drive the baffle 7146 and the spring 7145 to move, thus affecting normal exhaust, the air pressure P in the sealing cylinder 713 and the elastic force f of the spring 7145, the radius r1 of the first air guide hole 7142, the second air guide hole 7147, and the radius r2 of the through hole 7143 satisfy the following relationship: P = α·f / π(r1+r2) 2 ; In the above formula, the unit of P is MPa; the unit of f is N;

[0061] The units of r1 and r2 are cm; α is the air pressure coefficient, which ranges from 0.56 to 2.33. In order to further improve the exhaust effect, the pressure F at the outlet of the screw barrel 71 is related to the feed volume q, the speed n of the screw 73, the speed v of the material in the screw 73, and the internal tension σ of the material to meet the following conditions: F = β·(ng / v) 1 / 2 +σ; In the above formula, β is the relationship coefficient, ranging from 2.57 to 12.65; F is in N; n is in rpm; g is in g / min; and v is in cm / min. The above formula only performs calculations.

[0062] Example 3:

[0063] like Figure 6-8 As shown, based on Example 1, the discharge end of the screw barrel 71 is connected to a discharge tray 8, which is a porous structure. A shearing mechanism 9 is provided on the discharge side of the discharge tray 8. The shearing mechanism 9 includes a cutter 10. The cutter 10 is located on one side of the discharge tray 8, and the cutter 10 cuts from the side.

[0064] A telescopic rod is connected to one side of the sealing box 91, and the telescopic rod is connected to the cylinder 12; the end of the cylinder 12 is symmetrically connected to two second telescopic rods 93, the second telescopic rod 93 is set to pass through the sealing box 91, and the second telescopic rod 93 is slidingly connected to the sealing box 91, and the other end of the second telescopic rod 93 is connected to a second piston plate 94. Two partitions 92 are provided inside the sealing box 91, and a compression chamber 97 is formed between the partition 92 and the sealing box 91, and an air chamber 98 is formed between the two partitions 92, and the multiple blowing ports 11 are connected to the device chamber.

[0065] The second piston plate 94 is in sealing and sliding connection with the inner wall of the compression chamber 97. An air inlet 95 is defined on the side of the compression chamber 97 away from the telescopic cylinder 13, and an air guide port 96 is defined on the side of the partition plate 92 away from the telescopic cylinder 13. The air inlet 95, located inside the compression chamber 97, is provided with an air inlet valve, which is rotatably connected to the inner wall of the sealing box 91 via a hinge. The expiration port is located on one side of the air chamber 98 and is provided with an air guide valve, which is rotatably connected to the partition plate 92 via a hinge.

[0066] When the shearing mechanism 9 is shearing, the cylinder 12 drives the telescopic cylinder 13 to cut, and at the same time, the second telescopic rod 93 fixed on the cylinder 12 drives the second piston plate 94 to move in the compression chamber 97. When the second piston plate 94 moves to the right, the air inlet valve of the air inlet 95 is opened by the negative pressure, and the external gas enters the compression chamber 97. The air guide valve of the air guide port 96 is closed by the negative pressure to prevent the gas in the air chamber 98 from being drawn into the compression chamber 97. When the second piston plate 94 moves to the right, the air inlet valve of the air inlet 95 is closed by the pressure, and the air guide port 96 is closed. The air guide valve is opened by pressure, and the gas in the compression chamber 97 enters the air chamber 98 through the air guide port 96. After repeated compression, the pressure in the chamber increases, and the gas in the air chamber 98 is quickly blown out from the air blowing port 11 and blown towards the cutter 10, effectively cooling the temperature of the cutter 10. In order to further improve the cooling effect, ensure that the cutter 10 is effectively cooled, and prevent the temperature of the cutter 10 from being too high, the temperature T of the cutter 10 and the gas flow rate V of the air blowing port 11, the pressure p in the air chamber 98, and the radius R of the air blowing port 11 meet the following relationship: T = δ·(AπR 2 ) / (V+p); In the above formula, δ is the temperature adjustment coefficient, ranging from 1.22 to 8.62; A is the number of air ports 11; R is in cm; T is in °C; V is in ml / min; and p is in MPa. The above formula only performs formula calculations.

[0067] Example 4

[0068] like Figure 9-10 On the basis of the first embodiment, it also includes a dust raw material particle size detection system, which includes an industrial camera 43. The industrial camera 43 takes pictures of the air duct 41 illuminated by the lighting lamp, and transmits the taken images to the single-chip microcomputer. The image processing module set by the single-chip microcomputer processes the images to obtain the particle size of the raw material dust. According to the size of the raw material dust particle size, a suitable filter is replaced to quickly separate the raw material dust for easy recycling; the image processing process includes: image acquisition, preprocessing, motion restoration, background removal, image enhancement, grayscale calculation, and obtaining the particle size.

[0069] In the process of image processing and image enhancement, the dust raw material particle size detection system may cause holes in the image after threshold segmentation or holes in the particles themselves due to the surface imbalance and uneven reflection of dust particles. These holes are not conducive to obtaining the characteristic information of the particles and affect the accuracy of particle size judgment. In order to reduce the influence of the holes, the scan line seed filling method is used to fill them, which effectively improves their influence. Specifically, the first step is to select any point (x, y) inside the image boundary as the seed point and store the point in an empty stack set in advance. The second step is to pop the seed point when the stack is not zero and define it as the scan line y. When the stack is zero, the stack ends. The third step is to fill the area inside the boundary in turn from the left and right directions of the scan line y, and the coordinates of the leftmost and rightmost ends are [X L ,X R ]; Step 4, finally search for the scan line adjacent to the scan line [X L ,X R ] range, if there is a filling area, save the rightmost image and make it a new seed point, then repeat the second step until the filling is completed. Through the above method, the influence of holes on the judgment of particle size is reduced and the accuracy of measurement is improved. For the calculation of particle size, after the edge detection and positioning of the particles and the filling of the holes, the area S of the particles can be obtained, and the diameter d of the particles satisfies, d = B / K·(4A / π). In the above formula, B is the area of each pixel in the image, K is the imaging magnification, and A is the area of the raw dust particles.

[0070] The device obtained by the above technical solution is a forming device and method for masterbatch production. The image processing module of the dust raw material particle size detection system processes the image in the air duct to obtain the particle size of the raw material dust. The appropriate filter is replaced according to the size of the raw material dust particle size to quickly separate the raw material dust for easy recycling. The degassing mechanism is set to pass the excess gas in the screw barrel through the air permeable cavity, and the second air intake mechanism and the first exhaust mechanism are quickly discharged, thereby effectively preventing the excess gas in the screw barrel from forming air partitions, resulting in uneven masterbatch thickness. At the same time, it prevents the cavitation effect and the formation of bubbles, which affects the production quality of the masterbatch, and improves the size uniformity of the masterbatch. The shearing mechanism is set to allow the gas in the compression chamber to enter the air chamber through the air guide port. After repeated compression action, the pressure in the chamber increases, and the gas in the air chamber is quickly blown out from the air port and blown towards the cutter, effectively cooling the cutter temperature, preventing it from heating and sticking to the masterbatch and pulling, and effectively reducing the uneven length of the masterbatch strips. The holes in the image are filled by scanning line seed filling, which effectively improves their impact, facilitates the acquisition of particle feature information, and improves the accuracy of particle size and area judgment. By limiting the relationship between the air pressure in the sealed cylinder and the elastic force of the spring, the radius of the first air guide hole, the radius of the second air guide hole, and the radius of the through hole, the exhaust rate is further increased to prevent the air pressure in the sealed cylinder from being too high or too low. Excessive air pressure can easily cause poor exhaust and the sealed cylinder is in danger of bursting. Excessive air pressure will not form enough pressure and negative pressure to move the baffle and spring, affecting normal exhaust. By limiting the relationship between the cutter temperature and the gas flow rate of the air port, the pressure in the air chamber, and the radius of the air port, the cooling effect is further improved to ensure effective cooling of the cutter and prevent the cutter temperature from being too high.

[0071] Other technical solutions not elaborated in detail in the present invention are all existing technologies in the field and will not be described in detail here.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A molding device for masterbatch production, characterized in that: The invention comprises a mixing bin (1), wherein a recycling mechanism (4) is provided near the top of the mixing bin (1) to separate and classify various mixed dust materials in the mixing bin (1) for recycling; a first motor (2) is provided at the bottom of the mixing bin (1), stirring is performed via stirring teeth (3) connected to the first motor (2); and a heater is provided at the bottom of the mixing bin (1) to heat the mixing bin (1); The mixing bin (1) is connected to a feeding pipe (6) near the bottom, and the other end of the feeding pipe (6) is connected to an extrusion mechanism (7), and the extrusion mechanism (7) includes a screw barrel (71), one end of the screw barrel (71) is provided with a second motor (72), and the output end of the second motor (72) is connected to a screw rod (73), and the screw rod (73) is matched and arranged inside the screw barrel (71); a degassing mechanism is provided below the screw barrel (71), and the degassing mechanism includes a sealing cylinder (713), and a first piston plate (712) is provided in the sealing cylinder (713), and the first piston plate (712) performs reciprocating motion in the sealing cylinder (713) to discharge the gas in the sealing cylinder (713) promptly and quickly; A shearing mechanism (9) is provided at the discharge end of the extrusion mechanism (7). The shearing mechanism (9) comprises a sealing box (91) and a cutter (10). The cutter (10) is arranged on the side of the sealing box (91). The sealing box (91) is provided with a plurality of air blowing ports (11) on one side of the cutter (10). The air blowing ports (11) are arranged in an array, and the cutter (10) is cooled by blowing air through the air blowing ports (11).

2. A molding device for masterbatch production according to claim 1, characterized in that: A large gear (74) is further provided on the output shaft of the second motor (72), and the large gear (74) is arranged outside the screw barrel (71). The large gear (74) is meshedly connected with a small gear (75), and the small gear (75) is driven and connected with a transmission rod (78). The other end of the transmission rod (78) is connected with a cam (79), and the cam (79) is matched and connected with a first telescopic rod (710). A slide seat (711) is provided below the first telescopic rod (710), and the first telescopic rod (710) is slidably connected to the slide seat (711).

3. A molding device for masterbatch production according to claim 1, characterized in that: The screw barrel (71) is provided with an air-permeable cavity (77) on one side close to the sealing cylinder (713), and a plurality of air-permeable holes (76) are provided between the air-permeable cavity (77) and the screw rod (73); the sealing cylinder (713) is provided with a first air-intake mechanism (714) and a second air-intake mechanism (715) on one side close to the air-permeable cavity (77), and the first air-intake mechanism (714) and the second air-intake mechanism (715) are arranged at positions close to both ends of the sealing cylinder (713). The air intake mechanism (715) realizes one-way ventilation from the air permeable cavity (77) to the inside of the sealing cylinder (713); a first exhaust mechanism (716) and a second exhaust mechanism (717) are provided on a side of the sealing cylinder (713) away from the air permeable cavity (77); the first exhaust mechanism (716) and the second exhaust mechanism (717) are arranged near the two ends of the sealing cylinder (713); the first exhaust mechanism (716) and the second exhaust mechanism (717) realize one-way ventilation from the inside to the outside of the sealing cylinder (713).

4. A molding device for masterbatch production according to claim 3, characterized in that: The first air intake mechanism (714) and the second air intake mechanism (715), the first air exhaust mechanism (716) and the second air exhaust mechanism (717) have the same structure and all include a box body (7141). The box body (7141) is arranged on the inner and outer sides of the sealing cylinder (713). The box body (7141) is located at the outer end of the sealing cylinder (713) and is provided with at least one first air guide hole (7142). The sealing cylinder (713) is provided with a through hole (7143), and a moving rod is provided in the through hole (7143). (7144), a spring (7145) is sleeved on the movable rod (7144), one end of the spring (7145) is connected to the inner wall of the box body (7141), and the other end of the spring (7145) is connected to the movable rod (7144), and one end of the movable rod (7144) is connected to a baffle (7146), and the baffle (7146) can be sealed and crimped with the through hole (7143); the box body (7141) is provided with at least one second air guide hole (7147) at the inner end of the sealing cylinder (713).

5. A molding device for masterbatch production according to claim 1, characterized in that: The recovery mechanism (4) comprises an air duct (41) and a shell (42). One end of the air duct (41) is connected to the mixing chamber (1), and the other end of the duct is connected to the shell (42). An industrial camera (43) and an optical element are provided in the air duct (41). The optical element is a lighting lamp for illuminating the air duct (41). An exhaust fan (44) is provided at one end of the shell (42) away from the air duct (41). A first filter (45) and a second filter (46) are provided in sequence inside the shell (42). A third filter (47) is provided inside the exhaust fan (44). The apertures of the first filter (45), the second filter (46), and the third filter (47) decrease in sequence. The first filter (45), the second filter (46), and the third filter (47) are all movably connected to the shell (42) for easy replacement.

6. A molding device for masterbatch production according to any one of claims 1 to 4, characterized in that: The discharge end of the screw barrel (71) is connected to a discharge tray (8), which is a porous structure. A shearing mechanism (9) is provided on the discharge side of the discharge tray (8), and the shearing mechanism (9) includes a cutter (10). The cutter (10) is located on one side of the discharge tray (8), and the cutter (10) cuts from the side.

7. A molding device for masterbatch production according to claim 1, characterized in that: One side of the sealing box (91) is connected to a telescopic rod, and the telescopic rod is connected to a cylinder (12); the end of the cylinder (12) is symmetrically connected to two second telescopic rods (93), the second telescopic rod (93) is arranged to pass through the sealing box (91), the second telescopic rod (93) is slidingly connected to the sealing box (91), and the other end of the second telescopic rod (93) is connected to a second piston plate (94), and two partitions (92) are provided inside the sealing box (91), a compression chamber (97) is formed between the partition (92) and the sealing box (91), and an air chamber (98) is formed between the two partitions (92), and a plurality of the blowing ports (11) are connected to the chamber.

8. A molding device for masterbatch production according to claim 7, characterized in that: The second piston plate (94) is in sealing sliding connection with the inner wall of the compression chamber (97); an air inlet (95) is provided on the side of the compression chamber (97) away from the telescopic cylinder (13); and an air guide port (96) is provided on the side of the partition plate (92) away from the telescopic cylinder (13).

9. A molding device for masterbatch production according to claim 8, characterized in that: The air inlet (95) is located on the inner side of the compression chamber (97) and is provided with an air inlet valve, and the air inlet valve is rotatably connected to the inner wall of the sealing box (91) through a hinge; the expiration port is located on one side of the air chamber (98) and is provided with an air guide valve, and the air guide valve is rotatably connected to the partition (92) through a hinge.

10. A molding device for masterbatch production according to claim 1, characterized in that: The system also includes a dust raw material particle size detection system, which includes an industrial camera (43). The industrial camera (43) takes a picture of the air duct (41) illuminated by a lighting lamp, transmits the captured image to a single-chip microcomputer, processes the image through an image processing module provided in the single-chip microcomputer, and obtains the particle size of the raw material dust. According to the size of the raw material dust particle size, a suitable filter is replaced to quickly separate the raw material dust for easy recycling. The image processing process includes: image acquisition, preprocessing, motion restoration, background removal, image enhancement, grayscale calculation, and particle size determination.

Images