Injection molding equipment for plastic product production

Abstract

The injection molding equipment for plastic product production comprises an injection pipe, a main shaft rod, a hot drying pipe box and a flow dividing pipe barrel, the main shaft rod is arranged in the injection pipe, one end of the hot drying pipe box is fixedly connected and communicated with the injection pipe, two independent air guide cavities are formed in the hot drying pipe box, the flow dividing pipe barrel is rotationally assembled in the hot drying pipe box, and the main shaft rod is arranged in the main shaft rod. The main shaft rod is rotationally sleeved with the flow dividing pipe barrel, a plurality of front feeding ports are formed in the side, facing the injection pipe, of the flow dividing pipe barrel, two independent material guiding cavities are formed in the flow dividing pipe barrel, and the two sets of material guiding cavities communicate with the two sets of air guiding cavities. And the rotary flow dividing pipe barrel is arranged in the hot drying pipe box, multi-section hot air drying is conducted on input injection molding raw materials through waste heat in the injection pipe, and the situation that the product quality of molten materials after injection is affected due to the fact that residual water on the surfaces of the raw materials forms bubbles in the high-temperature melting stage is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machines, and particularly to an injection molding device for the production of plastic products. Background Art

[0002] An injection molding machine is an industrial device used for the molding of plastic products and is widely used in the production of various plastic parts and daily necessities. It forms the required shape of the product by injecting molten plastic material into the mold cavity under high pressure and then cooling and solidifying it, becoming one of the core processes in plastic processing in modern manufacturing.

[0003] Chinese Patent CN115447088B discloses an injection molding device and its injection molding process for environmentally friendly multi-color plastic products, including an injection sleeve. The front end of the injection sleeve is reduced in diameter to form a nozzle. By energizing the electromagnet coil, the electromagnet coil is pulled towards the magnetic ring, the pin passes through the through hole and pushes against the sleeve, and the sleeve is pressed against the thread on the injection screw. The continuously rotating injection screw delivers the sleeve engaged with its thread towards the nozzle. During this process, the sleeve uses its outer surface to synchronously scrape the molten material on the inner wall of the injection sleeve, and the sleeve uses the tooth pattern meshed with the injection screw inside to scrape the molten material on the surface pattern of the injection screw until the sleeve pushes all the molten material in the injection sleeve and on the injection screw into the nozzle and injects it out, effectively avoiding partial residue of the molten material inside the injection sleeve and the injection screw and cooling and blocking.

[0004] During the actual working process of the above injection molding device, if the surface of the used injection raw material contains unremoved moisture, during the high-temperature melting process of the raw material, the moisture will evaporate into gas and form bubbles in the molten raw material, resulting in bubbles in the injection-molded plastic product and affecting the quality of the product. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the embodiments of the present invention is to provide an injection molding device for the production of plastic products to solve the problems in the above background art.

[0006] To achieve the above technical solution, the present invention provides the following technical solution:

[0007] An injection molding device for the production of plastic products, including an injection tube group. The injection tube group includes an injection tube, an injection head, and a main shaft rod. One end of the injection tube is provided with an injection head for outputting molten plastic raw material. A main shaft rod is arranged in the injection tube, and the main shaft rod and the injection tube are coaxially arranged;

[0008] Hot air drying tube group, the hot air drying tube group includes a hot air drying tube box, a bottom air inlet pipe and a top air discharge pipe. One end of the hot air drying tube box is fixedly connected to the injection tube, and the inner cavity of the hot air drying tube box is communicated with the inner cavity of the injection tube. The bottom air inlet pipe is arranged at the bottom of the hot air drying tube box and close to one side of the injection tube. The top air discharge pipe is arranged at the top of the hot air drying tube box and close to one side of the injection tube;

[0009] Diversion tube group, the diversion tube group includes a diversion tube cylinder, a front feed inlet, a circumferential air guide port and a circumferential partition. The diversion tube cylinder is fixedly and rotationally assembled in the hot air drying tube box, and the diversion tube cylinder is limitedly assembled in the hot air drying tube box, and the diversion tube cylinder is rotationally sleeved on the main shaft rod. A plurality of front feed inlets are further arranged on one side of the diversion tube cylinder facing the injection tube. A plurality of circumferential air guide ports are also arranged on the diversion tube cylinder in the circumferential direction. One end of the circumferential partition is fixedly assembled on the outer diameter end of the diversion tube cylinder, and the other end of the circumferential partition is slidably assembled in the inner cavity of the hot air drying tube box;

[0010] Feed pipe group, the feed pipe group is arranged at one end of the hot air drying tube box and communicated with the hot air drying tube box. The feed pipe group is used to input the injection molding raw material to be heated into one end of the hot air drying tube box.

[0011] As a further scheme of the present invention, the injection tube group further includes a baffle plate, a material injection hole, an injection head and an injection groove. The baffle plate is fixedly assembled on the main shaft rod, and a material injection hole is arranged on the baffle plate. An injection head is further arranged at one end of the main shaft rod. The injection head is fixedly connected to the main shaft rod, and a plurality of injection grooves are circumferentially arranged on the injection head.

[0012] As a further scheme of the present invention, the injection tube group further includes a plugging plate and a drainage hole. The plugging plate is arranged between the baffle plate and the injection head, and a plurality of drainage holes are arranged in the middle of the plugging plate.

[0013] As a further scheme of the present invention, the hot air drying tube group further includes an air guiding pipe, an air guiding box and a guide air pipe. One end of the air guiding pipe is fixedly connected to the top air discharge pipe, and the other end of the air guiding pipe is communicated with the air guiding box. The air guiding box is arranged at the bottom of the hot air drying tube box, and a plurality of guide air pipes are arranged on the air guiding box. The guide air pipes penetrate through one side of the bottom of the inner cavity of the hot air drying tube box.

[0014] As a further scheme of the present invention, the diversion tube group further includes a tail baffle, an inclined feed inlet and a scraper. The tail baffle is arranged at the end of the diversion tube cylinder, and an inclined inclined feed inlet is arranged on the tail baffle. One end of the inclined feed inlet is communicated with the inner cavity of the hot air drying tube box, and the other end of the inclined feed inlet is communicated with the inner cavity of the diversion tube cylinder.

[0015] As a further solution of the present invention, the feed pipe group includes a feed pipe, a main shaft driver, a sleeve housing, a feed screw, a injection pipe, a material distributing shaft and a material distributing rod. The feed pipe is arranged on one side of the hot air drying pipe box, and the inner cavity of the feed pipe is communicated with the inner cavity of the hot air drying pipe box. A main shaft driver is also arranged on one side of the feed pipe, and the main shaft driver is assembled and connected with the main shaft rod. The sleeve housing is sleeved on the outer diameter side of the main shaft rod, and one end of the sleeve housing is fixedly connected with the shunt pipe cylinder. A feed screw is also arranged on the surface of the sleeve housing. The injection pipe is fixedly assembled on the top of the feed pipe. A material distributing shaft is rotatably arranged in the injection pipe, and a plurality of material distributing rods are circumferentially arranged on the material distributing shaft.

[0016] As a further solution of the present invention, the injection pipe group further includes a shaft pin, the shunt pipe group further includes a limiting groove, a shaft pin is also arranged on the main shaft rod, a limiting groove is also arranged on the inner diameter side of the tail stop block, and the shaft pin is slidably assembled in the limiting groove in a limited manner.

[0017] As a further solution of the present invention, a first cavity and a second cavity are arranged inside the hot air drying pipe box. The first cavity and the second cavity are respectively arranged at both ends of the circumferential partition board, and the bottom air inlet pipe and the top air outlet pipe are both arranged on one side of the first cavity.

[0018] As a further solution of the present invention, a third cavity and a fourth cavity are arranged inside the shunt pipe cylinder, and a baffle component is arranged between the third cavity and the fourth cavity.

[0019] As a further solution of the present invention, the baffle component includes a middle baffle, a communication groove, a movable baffle, a positioning shaft ring, a traction arm, a traction cylinder and a traction arm. The middle baffle is arranged between the third cavity and the fourth cavity, and the middle baffle is fixedly assembled on the main shaft rod. A plurality of communication grooves are circumferentially arranged on the middle baffle. A movable baffle is arranged in the communication groove. One end of the movable baffle is rotatably assembled in the communication groove, and the other end of the movable baffle is rotatably connected with a traction arm. One end of the positioning shaft ring is rotatably sleeved on the main shaft rod, and the other end of the positioning shaft ring is rotatably assembled in the inner cavity of the hot air drying pipe box in a limited manner. A plurality of traction arms are also arranged on the positioning shaft ring. A traction cylinder is rotatably connected to the traction arm, and the end of the traction cylinder is elastically inserted into the traction arm in a sliding manner.

[0020] Adopting the above technical solution, the present invention has the following beneficial effects:

[0021] By arranging a hot air drying pipe box on one side of the injection pipe and arranging a rotating shunt pipe cylinder inside the hot air drying pipe box, the present invention uses the waste heat in the injection pipe to perform multi-stage hot air drying on the input injection molding raw materials, effectively preventing the moisture remaining on the surface of the raw materials from forming bubbles in the high-temperature melting stage, resulting in the quality of the product after injection being affected. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a partial cross-sectional view of an injection molding device for producing plastic products provided in an embodiment of the present invention.

[0024] Figure 2 It is a schematic structural diagram of an injection molding device for producing plastic products provided in an embodiment of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the structure marked A in the injection molding device for producing plastic products provided in an embodiment of the present invention.

[0026] Figure 4 It is a schematic structural diagram of the structure marked B in the injection molding device for producing plastic products provided in an embodiment of the present invention.

[0027] Figure 5 It is a schematic structural diagram of the structure marked C in the injection molding device for producing plastic products provided in an embodiment of the present invention.

[0028] Figure 6 It is a partial structural schematic diagram of an injection molding device for producing plastic products provided in an embodiment of the present invention.

[0029] Figure 7 It is a schematic structural diagram of the structure marked D in the injection molding device for producing plastic products provided in an embodiment of the present invention.

[0030] Reference numerals: 1 - injection tube group, 101 - injection tube, 102 - injection head, 103 - main spindle rod, 104 - material baffle plate, 105 - material injection hole, 106 - injection head, 107 - injection groove, 108 - sealing plate, 109 - drainage hole, 110 - shaft pin, 2 - hot air drying tube group, 201 - hot air drying tube box, 202 - bottom air inlet pipe, 203 - top air discharge pipe, 204 - air guiding pipe, 205 - air guiding box, 206 - air duct, 207 - constant pressure groove, 3 - shunt tube group, 301 - shunt tube cylinder, 302 - front feed inlet, 303 - circumferential air guiding port, 304 - circumferential partition plate, 305 - tail stop block, 306 - inclined feed inlet, 307 - scraper, 4 - feed pipe group, 401 - feed pipe, 402 - main shaft driver, 403 - sleeve housing, 404 - feed screw, 405 - material injection pipe, 406 - material pushing shaft, 407 - material pushing rod, 5 - baffle plate assembly, 501 - middle baffle plate, 502 - communication groove, 503 - movable baffle plate, 504 - positioning shaft collar, 505 - traction arm, 506 - traction cylinder, 507 - traction arm. Detailed implementation mode

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] Please refer to Figures 1-7, an injection molding device for producing plastic products in an embodiment of the present invention includes an injection tube group 1. The injection tube group 1 includes an injection tube 101, an injection head 102, and a main shaft rod 103. One end of the injection tube 101 is provided with an injection head 102, and the injection head 102 is used to output molten plastic raw materials. A main shaft rod 103 is arranged in the injection tube 101, and the main shaft rod 103 and the injection tube 101 are coaxially arranged; a heat drying tube group 2. The heat drying tube group 2 includes a heat drying tube box 201, a bottom air inlet pipe 202, and a top air exhaust pipe 203. One end of the heat drying tube box 201 is fixedly connected to the injection tube 101, and the inner cavity of the heat drying tube box 201 is communicated with the inner cavity of the injection tube 101. The bottom air inlet pipe 202 is arranged at the bottom of the heat drying tube box 201 and close to one side of the injection tube 101. The top air exhaust pipe 203 is arranged at the top of the heat drying tube box 201 and close to one side of the injection tube 101; a shunt tube group 3. The shunt tube group 3 includes a shunt tube cylinder 301, a front feed inlet 302, a circumferential air guide port 303, and a circumferential partition 304. The shunt tube cylinder 301 is fixedly rotatably assembled in the heat drying tube box 201, and the shunt tube cylinder 301 is limitedly assembled in the heat drying tube box 201, and the shunt tube cylinder 301 is rotatably sleeved on the main shaft rod 103. A plurality of front feed inlets 302 are further arranged on one side of the shunt tube cylinder 301 facing the injection tube 101. A plurality of circumferential air guide ports 303 are also arranged on the shunt tube cylinder 301 in the circumferential direction. One end of the circumferential partition 304 is fixedly assembled on the outer diameter end of the shunt tube cylinder 301, and the other end of the circumferential partition 304 is slidably assembled in the inner cavity of the heat drying tube box 201; a feed tube group 4. The feed tube group 4 is arranged at one end of the heat drying tube box 201 and communicated with the heat drying tube box 201. The feed tube group 4 is used to input the injection raw materials to be heated into one end of the heat drying tube box 201. A first cavity a1 and a second cavity a2 are arranged inside the heat drying tube box 201. The first cavity a1 and the second cavity a2 are respectively arranged at both ends of the circumferential partition 304, and the bottom air inlet pipe 202 and the top air exhaust pipe 203 are both arranged on one side of the first cavity a1; a third cavity a3 and a fourth cavity a4 are arranged inside the shunt tube cylinder 301. A baffle assembly 5 is arranged between the third cavity a3 and the fourth cavity a4.

[0034] In practical application of this embodiment, the injection tube group 1 takes the injection tube 101 as the main body. An injection head 102 is arranged on one side of the injection tube 101. The main shaft rod 103 is fixedly arranged in the injection tube 101. The hot air drying tube box 201 is arranged on one side of the injection tube 101 and is communicated with the cavity of the injection tube 101. The shunt tube cylinder 301 is fixedly rotationally assembled in the hot air drying tube box 201, and a pre-feed port 302 is arranged on one side of the shunt tube cylinder 301, so that the inner cavity of the shunt tube cylinder 301 is communicated with the inner cavity of the injection tube 101. A circumferential partition plate 304 is also fixedly arranged at the outer diameter end of the shunt tube cylinder 301. The circumferential partition plate 304 divides the inner cavity of the hot air drying tube box 201 into a first cavity a1 and a second cavity a2. The first cavity a1 is communicated with a third cavity a3 through a circumferential air guide port 303. During the process of conveying the injection molding raw material, it is communicated with the injection tube 101, and the inside of the injection tube 101 is in the heating section. Therefore, the heat generated by heating continuously radiates into the third cavity a3. A circumferential air guide port 303 is arranged on the wall surface side of the third cavity a3, and an air pipeline for pumping air from the bottom air inlet pipe 202 to the top air outlet pipe 203 is arranged in the first cavity a1, which can introduce external gas into the first cavity a1 along the bottom air inlet pipe 202, so that the gas passes through the circumferential air guide port 303 and enters the third cavity a3. At this time, the main shaft rod 103 is in a continuously rotating state under the driving state, so that the shunt tube cylinder 301 assembled and connected with the main shaft rod 103 rotates synchronously around the fixed axis. During the rotation of the shunt tube cylinder 301, the injection molding raw material entering the third cavity a3 continuously tumbles. On the one hand, the heat input from one side of the injection tube 101 makes the moisture on the surface of the injection molding raw material in the third cavity a3 continuously evaporate. And by using the continuous rotation of the shunt tube cylinder 301, the injection molding raw material can be fully turned over, so that the surface of the raw material can be uniformly heated. At the same time, during the turning process, the gas introduced from one side of the bottom air inlet pipe 202 can continuously take away the water vapor evaporated from the surface of the raw material, so that the water vapor enters the top air outlet pipe 203 during the process of flowing with the gas, and then is discharged out of the cavity of the hot air drying tube box 201 along the top air outlet pipe 203. During the rotation of the shunt tube cylinder 301, the injection molding raw material input from the feed tube group 4 can be rolled into the second cavity a2 on one side of the hot air drying tube box 201. The raw material continuously rolls in the second cavity a2 following the shunt tube cylinder 301, and can fall into the fourth cavity a4 through the shell of the shunt tube cylinder 301 during the longitudinal upward process. During this process, the hot air dried gas output from one side of the top air outlet pipe 203 is output along the pipeline to the bottom side of the cavity of the second cavity a2, and the hot air dried gas can perform primary hot air drying on the raw material rolling in the second cavity a2 during the flowing process. By using the rotating shunt tube cylinder 301 to drive the raw material to roll, the contact area and contact time between the hot air dried gas and the raw material are increased, so that the raw material input into the injection tube 101 undergoes two-stage hot air drying process.To fully remove the moisture on the surface of the raw materials.

[0035] In one case of this embodiment, a replaceable water-absorbing core is provided in the overhead exhaust duct 203, which can perform primary adsorption and filtration on the gas discharged from the first cavity a1. The structure of the replacement core will not be specifically described here.

[0036] Please refer to Figure 3 , in a preferred embodiment of the present invention, the injection tube group 1 further includes a material blocking disk 104, a material injection hole 105, an injection head 106, an injection groove 107, a blocking disk 108 and a drainage hole 109. The material blocking disk 104 is fixedly assembled on the main spindle rod 103, and a material injection hole 105 is provided on the material blocking disk 104. One end of the main spindle rod 103 is further provided with an injection head 106, and the injection head 106 is fixedly connected to the main spindle rod 103. A plurality of injection grooves 107 are circumferentially arranged on the injection head 106. The blocking disk 108 is arranged between the material blocking disk 104 and the injection head 106, and a plurality of drainage holes 109 are provided in the middle of the blocking disk 108.

[0037] In the actual application of this embodiment, the material blocking disk 104 is fixedly assembled on the main spindle rod 103, and a screw is provided on the main spindle rod 103 on the side of the injection tube 101. When the raw materials entering the injection tube 101 section are melted under high-temperature conditions, when the main spindle rod 103 is continuously rotating, the screw on its surface can continuously press the melted raw materials towards the material blocking disk 104 side, and make the melted raw materials pass through the material injection hole 105 and enter the cavity between the material blocking disk 104 and the injection head 106. At this time, there is a gap between the blocking disk 108 and the material blocking disk 104, and the melted raw materials can flow to the injection head 102 side through the drainage holes 109 in the middle of the blocking disk 108 and the injection grooves 107 on the injection head 106. When the main spindle rod 103 moves towards the injection head 102 side under the driving action, the blocking disk 108 fits against the material blocking disk 104 side under the pressure of the fluid, so that the material injection hole 105 is in a blocked state. At this time, the melted raw materials at one end of the injection head 102 can flow out along the injection head 102 under continuous pushing.

[0038] Please refer to Figure 6 , in a preferred embodiment of this embodiment, the hot air drying tube group 2 further includes an air guiding tube 204, an air guiding box 205 and an air guiding duct 206. One end of the air guiding tube 204 is fixedly connected to the overhead exhaust duct 203, and the other end of the air guiding tube 204 communicates with the air guiding box 205. The air guiding box 205 is arranged at the bottom of the hot air drying tube box 201, and a plurality of air guiding ducts 206 are provided on the air guiding box 205. The air guiding ducts 206 penetrate through one side of the cavity bottom of the hot air drying tube box 201.

[0039] In practical application of this embodiment, the air guiding pipe 204 is arranged at one end of the overhead exhaust air pipe 203 and is communicated with the overhead exhaust air pipe 203. The end of the air guiding pipe 204 is communicated with an air guiding box 205. The air guiding box 205 is fixedly arranged at the bottom side of the cavity of the hot air drying pipe box 201 and is arranged outside the shell of the hot air drying pipe box 201. A plurality of air guiding pipes 206 are arranged on the air guiding box 205. The air guiding pipes 206 pass through the bottom of the cavity of the hot air drying pipe box 201 and are arranged in the second cavity a2, so that the hot air drying gas output in the first cavity a1 flows along the air guiding pipe 204 into the air guiding box 205, and then is input into the second cavity a2 along the air guiding pipes 206. At this time, the injection molding raw materials input into the hot air drying pipe box 201 through the feed pipe group 4 are in contact with the hot air drying gas output in the air guiding pipes 206 during the continuous turning process. On the one hand, the continuous pumping of the gas makes the raw material particles continuously roll, increasing the contact area between the gas and the surface of the raw material particles and increasing the contact time between the hot air drying gas and the raw material particles. On the other hand, the residual heat of the hot air drying gas can also be used to perform primary drying on the fed raw material particles, so that the residual moisture on the surface of the raw material particles is discharged outside the shell of the hot air drying pipe box 201 along the constant pressure groove 207 during the drying process.

[0040] Please refer to Figure 4 , in a preferred embodiment of the present invention, the shunt pipe group 3 further includes a tail block 305, an inclined feed port 306 and a scraper 307. The tail block 305 is arranged at the end of the shunt pipe cylinder 301, and an inclined inclined feed port 306 is arranged on the tail block 305. One end of the inclined feed port 306 is communicated with the inner cavity of the hot air drying pipe box 201, and the other end of the inclined feed port 306 is communicated with the inner cavity of the shunt pipe cylinder 301.

[0041] In practical application of this embodiment, the tail block 305 is arranged on the side of the shunt pipe cylinder 301 close to the feed pipe group 4, and the tail block 305 has a conical structure. Therefore, when the raw materials in the feed pipe group 4 fall into the hot air drying pipe box 201, the raw materials are first blocked by the conical bottom side during the movement process and fall to one side of the bottom of the second cavity a2. As the shunt pipe cylinder 301 continuously rotates, a plurality of scrapers 307 on the outer diameter end of the shunt pipe cylinder 301 continuously longitudinally transport the raw materials on one side of the bottom of the second cavity a2 during the fixed-axis rotation process. And when the scrapers 307 are lifted to a horizontal state, the raw materials on the scrapers 307 continuously move towards the outer wall side of the shunt pipe cylinder 301. Since the tail block 305 has a conical structure, a V-shaped groove structure is formed with the outer wall end of the shunt pipe cylinder 301. The raw materials falling into the V-shaped groove pass through the inclined feed port 306 and enter the fourth cavity a4, and the raw materials are continuously turned in the fourth cavity a4.

[0042] Please refer to Figure 5, in a preferred embodiment of the present invention, the feed pipe group 4 includes a feed pipe 401, a main shaft driver 402, a sleeve housing 403, a feed screw 404, a filling pipe 405, a material distributing shaft 406, and a material distributing rod 407. The feed pipe 401 is disposed on one side of the hot air drying pipe box 201, and the inner cavity of the feed pipe 401 is communicated with the inner cavity of the hot air drying pipe box 201. A main shaft driver 402 is further provided on one side of the feed pipe 401, and the main shaft driver 402 is assembled and connected to the main shaft rod 103. The sleeve housing 403 is sleeved on the outer diameter side of the main shaft rod 103, and one end of the sleeve housing 403 is fixedly connected to the shunt pipe cylinder 301. A feed screw 404 is further provided on the surface of the sleeve housing 403. The filling pipe 405 is fixedly assembled on the top of the feed pipe 401. A material distributing shaft 406 is rotatably provided in the filling pipe 405, and a plurality of material distributing rods 407 are circumferentially arranged on the material distributing shaft 406.

[0043] In actual application of this embodiment, one end of the feed pipe 401 is fixedly connected to the hot air drying pipe box 201, and the inner cavity of the feed pipe 401 is communicated with the inner cavity of the hot air drying pipe box 201. The main shaft driver 402 provided on one side of the feed pipe 401 is assembled and connected to the main shaft rod 103 for controlling the rotation and telescoping of the main shaft rod 103. The sleeve housing 403 is rotatably sleeved on the main shaft rod 103, and a feed screw 404 is further provided on the outer diameter end of the sleeve housing 403. During the process of the sleeve housing 403 rotating following the main shaft rod 103, the feed screw 404 can continuously convey the input injection molding raw material to the inner cavity side of the hot air drying pipe box 201, so that the input raw material enters the second cavity a2 along the feed pipe 401. A filling pipe 405 is provided on the feed pipe 401. A material distributing shaft 406 is provided in the filling pipe 405, and a plurality of material distributing rods 407 are circumferentially arranged on the material distributing shaft 406. During the process of the material distributing shaft 406 rotating driven by an external drive source, the plurality of material distributing rods 407 can be driven to rotate, so that the injection molding raw material in the filling pipe 405 is uniformly and continuously conveyed into the feed pipe 401, avoiding the situation of material jamming.

[0044] Please refer to Figure 4 and Figure 6 , in a preferred embodiment of the present invention, the injection pipe group 1 further includes a shaft pin 110, the shunt pipe group 3 further includes a limiting groove 308, a shaft pin 110 is further provided on the main shaft rod 103, a limiting groove 308 is further provided on the inner diameter side of the tail stop block 305, and the shaft pin 110 is limited and slidably assembled in the limiting groove 308.

[0045] In actual application of this embodiment, a shaft pin 110 is further provided on the main shaft rod 103, and a limiting groove 308 is further provided at the inner diameter end of the tail stop block 305. The shaft pin 110 is assembled in the limiting groove 308 in a limited sliding manner, so that the main shaft rod 103 drives the limiting groove 308 to rotate synchronously during continuous rotation, so that the flow dividing tube cylinder 301 rotates synchronously with the main shaft rod 103. When the main shaft rod 103 slides in the axial direction, the limiting groove 308 slides on the shaft pin 110 synchronously, so that the flow dividing tube cylinder 301 is assembled in the hot air drying tube box 201 in a limited rotating manner.

[0046] Please refer to Figure 7 , in a preferred embodiment of the present invention, the baffle assembly 5 includes a central baffle 501, a communication groove 502, a movable baffle 503, a positioning collar 504, a traction arm 505, a traction cylinder 506 and a traction arm 507. The central baffle 501 is arranged between the third cavity a3 and the fourth cavity a4, and the central baffle 501 is fixedly assembled on the main shaft rod 103. A plurality of communication grooves 502 are circumferentially arranged on the central baffle 501. A movable baffle 503 is arranged in the communication groove 502. One end of the movable baffle 503 is rotatably assembled in the communication groove 502, and the other end of the movable baffle 503 is rotatably connected to a traction arm 507. One end of the positioning collar 504 is rotatably sleeved on the main shaft rod 103, and the other end of the positioning collar 504 is assembled in the inner cavity of the hot air drying tube box 201 in a limited rotating manner. A plurality of traction arms 505 are also arranged on the positioning collar 504. A traction cylinder 506 is rotatably connected to the traction arm 505. The end of the traction cylinder 506 is elastically inserted into the traction arm 507 in a sliding manner.

[0047] In practical application of this embodiment, the middle baffle 501 is fixedly assembled on the main shaft rod 103, and the main shaft rod 103 can drive the middle baffle 501 to rotate continuously during rotation. Since a number of communication grooves 502 are arranged on the middle baffle 501, and a movable baffle 503 is rotatably arranged in the communication groove 502, one end of the movable baffle 503 is rotatably provided with a traction arm 507, the end of the traction arm 507 is elastically inserted into the traction cylinder 506 in a sliding manner, and the end of the traction cylinder 506 is rotatably assembled on the traction arm 505. The positioning collar 504 is rotatably sleeved on the shunt pipe cylinder 301 in a limited manner. When the main shaft rod 103 is in a continuous rotation feeding state, the main shaft rod 103 drives a number of movable baffles 503 to rotate towards the side away from the middle baffle 501 through the positioning collar 504, so that the movable baffle 503 rotates away from the communication groove 502, and further enables a number of communication grooves 502 to be in an open state. At this time, the raw materials that have been initially heat-dried in the fourth cavity a4 can pass through the communication grooves 502 and enter the third cavity a3. When the main shaft rod 103 is in an injection state of pushing forward, the main shaft rod 103 drives the middle baffle 501 to move synchronously towards the injection pipe 101 side during movement. At this time, the movable baffle 503 rotates towards the middle baffle 501 side under the traction of the traction arm 507, so that the movable baffle 503 rotates and closes in the communication groove 502, and further enables the communication groove 502 to be in a closed state. At this time, the middle baffle 501 can push the injection molding raw materials in the third cavity a3 towards the injection pipe 101 side during the process of following the main shaft rod 103, so that the raw materials pass through the front feed port 302 and enter the inner cavity of the injection pipe 101.

[0048] In the above embodiment of the present invention, an injection molding device for producing plastic products is provided. By arranging a heat drying pipe box 201 on one side of the injection pipe 101 and arranging a rotating shunt pipe cylinder 301 inside the heat drying pipe box 201, the input injection molding raw materials are dried by multi-stage hot air using the waste heat in the injection pipe 101, effectively preventing the residual moisture on the surface of the raw materials from forming bubbles in the high-temperature melting stage, resulting in the quality of the product after injection being affected.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection molding device for producing plastic products, characterized in that: The injection molding equipment for producing plastic products includes: An injection tube assembly, the injection tube assembly comprising an injection tube, an injection head and a main shaft rod, one end of the injection tube is provided with an injection head, the injection head is used to output molten plastic raw materials, the injection tube is provided with a main shaft rod, the main shaft rod and the injection tube are coaxially arranged; A heat drying tube group, the heat drying tube group comprising a heat drying tube box, a bottom air inlet pipe and a top air exhaust pipe, one end of the heat drying tube box is fixedly connected to the injection tube, and the inner cavity of the heat drying tube box is connected to the inner cavity of the injection tube, the bottom air inlet pipe is arranged at the bottom of the heat drying tube box and is arranged close to one side of the injection tube, and the top air exhaust pipe is arranged at the top of the heat drying tube box and is arranged close to one side of the injection tube; A shunt pipe assembly, the shunt pipe assembly includes a shunt pipe tube, a front feed port, an annular air guide port and an annular baffle, the shunt pipe tube is rotatably mounted in the hot pipe drying box, the shunt pipe tube is limitedly mounted in the hot pipe drying box, and the shunt pipe tube is rotatably sleeved on the main shaft, the shunt pipe tube is also provided with a plurality of front feed ports on the side facing the injection pipe, the shunt pipe tube is also provided with a plurality of annular air guide ports in the circumferential direction, one end of the annular baffle is fixedly mounted on the outer diameter end of the shunt pipe tube, and the other end of the annular baffle is slidably mounted in the inner cavity of the hot pipe drying box; A feed pipe group is arranged at one end of the hot tube drying box and is connected to the hot tube drying box. The feed pipe group is used to input the injection molding raw material to be heated into one end of the hot tube drying box.

2. The injection molding equipment for producing plastic products according to claim 1, characterized in that: The injection tube group also includes a material blocking plate, a material injection hole, an injection head and an injection groove. The material blocking plate is fixedly assembled on the main shaft rod, and the material blocking plate is provided with a material injection hole. An injection head is also provided at one end of the main shaft rod. The injection head and the main shaft rod are fixedly connected, and a plurality of injection grooves are arranged circumferentially on the injection head.

3. The injection molding equipment for producing plastic products according to claim 2, characterized in that: The injection tube group also includes a blocking disk and drainage holes. The blocking disk is arranged between the material blocking disk and the injection head, and a plurality of drainage holes are arranged in the middle of the blocking disk.

4. The injection molding equipment for producing plastic products according to claim 1, characterized in that: The hot drying tube group also includes an air duct, an air guide box and an air guide duct. One end of the air duct is fixedly connected to the top exhaust duct, and the other end of the air duct is connected to the air guide box. The air guide box is arranged at the bottom of the hot drying tube box, and a plurality of air guide ducts are arranged on the air guide box. The air guide duct is passed through one side of the cavity bottom of the hot drying tube box.

5. The injection molding equipment for producing plastic products according to claim 1, characterized in that: The diverter tube group also includes a tail block, an inclined feed port and a scraper. The tail block is arranged at the end of the diverter tube tube, and an inclined inclined feed port is provided on the tail block. One end of the inclined feed port is connected to the inner cavity of the hot drying tube box, and the other end of the inclined feed port is connected to the inner cavity of the diverter tube tube.

6. The injection molding equipment for producing plastic products according to claim 1, characterized in that: The feed pipe group includes a feed pipe, a spindle driver, a sleeve shell, a feed screw, an injection pipe, a prying shaft and a prying rod. The feed pipe is arranged on one side of the hot tube drying box and the inner cavity of the feed pipe is connected with the inner cavity of the hot tube drying box. A spindle driver is also provided on one side of the feed pipe, and the spindle driver and the spindle rod are assembled and connected. The sleeve shell is sleeved on the outer diameter side of the spindle rod, and one end of the sleeve shell is fixedly connected to the diverter tube. A feed screw is also provided on the surface of the sleeve shell. The injection pipe is fixedly assembled on the top of the feed pipe. A prying shaft is rotatably provided in the injection pipe, and a plurality of prying rods are circumferentially arranged on the prying shaft.

7. The injection molding equipment for producing plastic products according to claim 5, characterized in that: The injection tube assembly also includes an axle pin, the shunt tube assembly also includes a limit groove, the main shaft rod is also provided with an axle pin, the inner diameter side of the tail stopper is also provided with a limit groove, and the axle pin is limitedly slidably assembled in the limit groove.

8. The injection molding equipment for producing plastic products according to claim 1, characterized in that: The hot tube oven is provided with a first cavity and a second cavity, the first cavity and the second cavity are respectively arranged at two ends of the annular partition, and the bottom air inlet pipe and the top air exhaust pipe are both arranged on one side of the first cavity.

9. The injection molding equipment for producing plastic products according to claim 1, characterized in that: A third cavity and a fourth cavity are arranged inside the diverter tube, and a baffle assembly is arranged between the third cavity and the fourth cavity.

10. The injection molding equipment for producing plastic products according to claim 9, characterized in that: The baffle assembly includes a central baffle, a connecting groove, a movable baffle, a positioning collar, a traction arm, a traction cylinder and a traction arm. The central baffle is arranged between the third cavity and the fourth cavity, and the central baffle is fixedly assembled on the main shaft rod. A plurality of connecting grooves are arranged circumferentially on the central baffle, and a movable baffle is arranged in the connecting groove. One end of the movable baffle is rotatably assembled in the connecting groove, and the other end of the movable baffle is rotatably connected to the traction arm. One end of the positioning collar is rotatably sleeved on the main shaft rod, and the other end of the positioning collar is limitedly rotatably assembled in the inner cavity of the hot drying tube box. A plurality of traction arms are also arranged on the positioning collar, and the traction arm is rotatably connected with a traction cylinder, and the end of the traction cylinder is elastically slidably inserted into the traction arm.

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