Plastic injection molding device and molding method

Abstract

The invention discloses a plastic injection molding device and method, a raw material extrusion mechanism is arranged on the right side of the top of a machine base, a material injection hopper is arranged on the top of the raw material extrusion mechanism, and a machine box is arranged on the left side of the top of the machine base. According to the plastic injection molding device and method, through mutual cooperation of the movable mold mechanism, the fixed mold mechanism, the upper arc plate mechanism, the lower arc plate mechanism, the trapezoidal block and the servo motor, the movable mold mechanism is provided with a plurality of movable mold assemblies, and the fixed mold mechanism is provided with a plurality of fixed molds; the multiple movable mold assemblies and the multiple fixed molds are in one-to-one correspondence, each movable mold assembly and the corresponding fixed mold jointly form a complete injection mold, and injection molding cavity structures in all the injection molds are different, so that the purpose of injection molding of plastic products of different specifications can be achieved, and the requirements of the plastic products of various specifications are met; and the application range is wide.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a plastic injection molding device and a molding method. Background Art

[0002] Plastic injection molding uses an injection molding machine and a mold to heat and melt thermoplastics or thermosetting plastics, then inject them into the mold cavity under high pressure. After cooling and solidification, a plastic product with a specific shape and size is obtained. The injection molding process generally includes the steps of mold closing, injection, pressure holding, cooling, mold opening and product removal. It is worth noting that in order to promote resource recycling and environmental protection, the recycling of plastic waste has also become an important part of this process. Before injection molding, some of the recycled plastic waste can be properly treated and re-put into the injection molding machine as raw material, which not only reduces the dependence on new plastic raw materials, but also reduces the generation of plastic waste and realizes the sustainable use of resources.

[0003] A wire harness molding device for a plastic injection molding machine disclosed in a patent application with reference publication number CN221292079U, after the mold cavity of the lower mold plate and the mold cavity of the upper mold plate are combined, the wire end part is no longer injected, and the injection molding machine will divide the material through a dividing pipe, and each injection molding tube will inject into the lower injection molding groove and the upper injection molding groove, so that the wire harness and the wire end connecting part are connected together through injection molding to form a whole completely covered wire harness, which has better waterproof and sealing effects and effectively improves the quality. The top plate and the upper mold mounting plate are slidably connected to the guide rod, which can provide a guiding effect for the movement of the upper mold, and push the push rod of the cylinder to drive the top plate to move, thereby providing power for the movement of the upper mold mounting plate.

[0004] Comprehensive analysis of the above reference patents shows the following defects: The existing plastic injection molding devices and molding methods are difficult to achieve convenient and efficient automatic demolding, and it is difficult to clean the inside of the movable mold in a timely and automatic manner after demolding. Waste may remain in the movable mold, affecting the subsequent injection molding effect. Therefore, it is necessary to provide a plastic injection molding device and molding method to solve the above technical problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a plastic injection molding device and molding method, which solves the problems that it is difficult to achieve convenient and efficient automatic demolding, and it is difficult to clean the inside of the movable mold in a timely and automatic manner after demolding, and waste may remain in the movable mold, affecting the subsequent injection molding effect.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A plastic injection molding device, comprising: A machine base is placed on the ground, a raw material extrusion mechanism is arranged on the top right side of the machine base, a filling hopper is arranged on the top of the raw material extrusion mechanism, a machine box is arranged on the top left side of the machine base, a containing box is fixedly arranged between the front and rear walls of the right part of the inner cavity of the box, a rotating shaft is rotatably arranged between the left and right side walls of the inner cavity of the containing box, a fixed mold mechanism is fixedly sleeved on the outer right side of the rotating shaft, an upper arc plate mechanism is fixedly arranged on the lower left part of the inner cavity of the containing box, a lower arc plate mechanism located directly below the upper arc plate mechanism is fixedly arranged on the lower left part of the inner cavity of the containing box, a trapezoidal block located between the upper arc plate mechanism and the lower arc plate mechanism is fixedly arranged on the lower left part of the inner cavity of the containing box, a servo motor is fixedly arranged on the left side of the containing box, an output shaft of the servo motor passes through the left wall of the containing box and is fixedly connected to the left end of the rotating shaft, a connected discharge cavity is opened between the top and the front end of the machine base, and the discharge cavity is located directly below the containing box; The movable mold mechanism is used in conjunction with the fixed mold mechanism, and the two together form a cavity to injection mold the required plastic products. The movable mold mechanism is fixedly sleeved on the outer left side of the rotating shaft, and the inner cavity of the chassis and located on the left side of the containing box is provided with a cooling mechanism for cooling the mold and the plastic product.

[0007] Preferably, the movable mold mechanism includes a left connecting frame, which is fixedly sleeved on the outside of the rotating shaft, and a plurality of left supporting plates are evenly and fixedly arranged in a circle on the outside of the left connecting frame, and a movable mold assembly is passed through the interior of each of the left supporting plates.

[0008] Preferably, the movable mold assembly includes a square cylinder, which slides through the interior of the left supporting plate, and side panels are fixedly provided on the left and right sides of the square cylinder, and the movable mold is fixedly provided on the right side of the right side panel through a plurality of support blocks, and a plurality of cross bars are evenly fixedly provided between the two side panels and on the outside of the square cylinder, and the cross bars slide through the interior of the left supporting plate, and a first spring is sleeved on the outside of each cross bar, and the first spring is located between the left side of the left supporting plate and the right side of the left side panel, and connecting blocks are fixedly provided on the upper and lower ends of the left side panel, and semicircular blocks are fixedly provided on the left sides of the two connecting blocks, and a demolding cylinder assembly located in the square cylinder is penetrated between the two side panels, and a plurality of cleaning cylinder assemblies evenly distributed on the outside of the demolding cylinder assembly are penetrated between the two side panels, and an air outlet disk assembly is fixedly provided on the left side of the inner cavity of the movable mold.

[0009] Preferably, the demolding cylinder assembly includes a main cylinder, which is fixedly connected between the two side plates and located in the square cylinder, a first piston is slidably arranged between the inner walls of the main cylinder, a first piston rod is fixedly arranged on the left side of the first piston, the left end of the first piston rod slides through the left wall of the main cylinder and is fixedly arranged with a ball, the outer fixed sleeve of the first piston rod is provided with a disk body located between the ball body and the left side plate, the outer sleeve of the first piston rod is provided with a second spring, the second spring is located between the disk body and the left side plate, the right side of the main cylinder is fixedly connected with a first air outlet pipe, the right end of the first air outlet pipe passes through between the right side plate and the movable mold and is connected to the interior of the air outlet disk assembly, the right part of the side wall of the main cylinder is fixedly connected with a first air inlet pipe, and the right end of the first air inlet pipe passes through the right side plate.

[0010] Preferably, each of the cleaning cylinder assemblies includes a side cylinder, the right side of the side cylinder is fixedly connected to the left side wall of the right side plate and is located in the square cylinder, a second piston is slidably arranged between the inner walls of the side cylinder, a second piston rod is fixedly arranged on the left side of the second piston, the left end of the second piston rod slides through the disk body, an external fixed sleeve of the second piston rod is provided with a baffle ring located between the disk body and the left side plate, an external sleeve of the second piston rod is provided with a third spring, and the third spring is located between the baffle ring and the left side plate, a second air outlet pipe is fixedly connected to the right side of the side cylinder, the right end of the second air outlet pipe passes through the right side plate and the movable mold and is connected to the interior of the air outlet disk assembly, a second air inlet pipe is fixedly connected to the right side of the side cylinder away from the main cylinder, the right end of the second air inlet pipe passes through the right side plate, an air outlet valve is fixedly arranged on the left parts of the first air outlet pipe and the second air outlet pipe, and an air inlet valve is fixedly arranged on the right parts of the first air inlet pipe and the second air inlet pipe.

[0011] Preferably, the air outlet plate assembly includes a hollow plate, which is fixedly connected to the left side of the inner cavity of the dynamic mold, and a plurality of air outlets are evenly arranged on the right side wall of the inner cavity of the hollow plate, and a trumpet-shaped mouth is arranged on the right side of each air outlet, and a support plate is fixedly arranged between the upper and lower walls of each air outlet, and a connecting rod slides through the middle of the support plate, and a blocking block is fixedly arranged on the right end of the connecting rod, and the blocking block is adapted to the trumpet-shaped mouth, and a stopper is fixedly arranged on the left end of the connecting rod, and the outer sleeve of the connecting rod is provided with a fourth spring located between the support plate and the stopper.

[0012] Preferably, the fixed mold mechanism includes a right connecting frame, which is fixedly sleeved on the outside of the rotating shaft, and a plurality of right carrying plates are evenly and fixedly arranged on the outside of the right connecting frame. A fixed mold is fixedly arranged on the left side of each of the right carrying plates, and the right side wall of each of the right carrying plates is in contact with the right side wall of the inner cavity of the containing box. A connected injection hole is opened between the middle of the right side of the right carrying plate and the inside of the corresponding fixed mold. The plurality of movable molds correspond one-to-one to the plurality of fixed molds, and each of the movable molds and the fixed mold at the corresponding position together form a complete injection mold. The injection cavity structure inside each injection mold is different, which is used for injection molding plastic products of different specifications.

[0013] Preferably, the upper arc plate mechanism includes an upper arc plate, which is fixedly connected to the lower left part of the inner cavity of the containing box, and an upper baffle is fixedly provided on the right side and the middle of the bottom of the upper arc plate, an upper trapezoidal protrusion is fixedly provided on the right side of the upper baffle on the left, and an upper limit block is fixedly provided on the left side of the upper baffle on the right, and the upper limit block is located in front of the upper trapezoidal protrusion.

[0014] Preferably, the lower arc plate mechanism includes a lower arc plate, which is fixedly connected to the lower left part of the inner cavity of the containing box and is located directly below the upper arc plate, and a lower baffle is fixedly provided on the right side and the middle of the top of the lower arc plate, a lower trapezoidal protrusion located directly below the upper trapezoidal protrusion is fixedly provided on the right side of the left lower baffle, and a lower limit block located directly below the upper limit block is fixedly provided on the left side of the right lower baffle, and the trapezoidal block is located between the upper limit block and the lower limit block.

[0015] The present invention also provides a plastic injection molding method, which uses a plastic injection molding device. The specific method includes the following steps: Step 1: Start the servo motor and drive the rotating shaft to rotate clockwise, and the movable mold mechanism and the fixed mold mechanism rotate accordingly, and rotate the required movable mold assembly and the fixed mold to the bottom. Since the left end of the raw material extrusion mechanism is fixedly connected to the lower right part of the containing box, when the required movable mold assembly and the fixed mold rotate to the bottom, the servo motor stops working, and at the same time, under the action of the upper arc plate mechanism and the lower arc plate mechanism, the movable mold assembly is pushed to the right, so that the right side of the movable mold assembly contacts the left side of the fixed mold, and the mold is closed; Step 2: Then, the granular plastic waste raw material is put into the injection hopper, and then the plastic waste raw material is pressurized and melted under the action of the raw material extrusion mechanism. The melted raw material is then transported by the raw material extrusion mechanism to the interior of the fixed mold and the movable mold assembly at the bottom. Then, the cooling mechanism works to control the temperature in the containing box so that the raw material between the movable mold assembly and the fixed mold is cooled and solidified to obtain a plastic product of the required specifications. Then, the servo motor is started again to drive the rotating shaft to continue to rotate clockwise, and the movable mold mechanism and the fixed mold mechanism rotate accordingly. During the process, under the cooperation of the upper arc plate mechanism, the lower arc plate mechanism and the trapezoidal block, the movable mold assembly gradually moves to the left, and the right side of the movable mold assembly is separated from the left side of the fixed mold, and the mold is automatically separated. At the same time, the plastic product moves with the movable mold assembly; Step three, then the interior of the movable mold assembly generates gas of a first preset pressure value blowing to the right, and under the blowing of the airflow, the plastic product located inside the movable mold assembly is blown out to the right, completing automatic demolding, and the blown plastic product falls into the discharge cavity directly below under the action of its own gravity, and then the interior of the movable mold assembly generates gas of a second preset pressure value blowing to the right, and during the process of the gas of the second preset pressure value blowing to the right, the residual waste material inside the movable mold assembly is blown out, completing automatic cleaning, and then starting the servo motor to drive the rotating shaft to rotate counterclockwise, and rotating the movable mold assembly and the fixed mold to the bottom again for the next round of injection molding operation.

[0016] Beneficial Effects The present invention provides a plastic injection molding device and a molding method. Compared with the prior art, the present invention has the following beneficial effects: 1. A plastic injection molding device and molding method, through the mutual cooperation between a movable mold mechanism, a fixed mold mechanism, an upper arc plate mechanism, a lower arc plate mechanism, a trapezoidal block and a servo motor, since a plurality of movable mold assemblies are arranged on the movable mold mechanism, a plurality of fixed molds are arranged on the fixed mold mechanism, a plurality of movable mold assemblies correspond to a plurality of fixed molds one by one, and each movable mold assembly and the fixed mold at the corresponding position together form a complete injection mold, the injection cavity structure inside each injection mold is different, and the purpose of injection molding plastic products of different specifications can be achieved, and the needs of plastic products of various specifications can be met, and the scope of use is wide.

[0017] 2. A plastic injection molding device and molding method, through the mutual cooperation between the square cylinder, the side plate, the cross bar, the first spring, the semicircular block, the upper trapezoidal protrusion and the lower trapezoidal protrusion, the required movable mold assembly and the fixed mold are rotated to the bottom, during which the semicircular block located at the upper part of the movable mold assembly will move along a side wall of the upper trapezoidal protrusion, and the upper trapezoidal protrusion will gradually push the semicircular block located at the upper part to the right, and at the same time, the semicircular block located at the lower part of the movable mold assembly will move along a side wall of the lower trapezoidal protrusion, and the lower trapezoidal protrusion will gradually push the semicircular block located at the lower part to the right, while the semicircular block is pushed to the right, the square cylinder slides to the right along the inside of the left carrying plate at the same time, and the movable mold can be automatically pushed to the right until the semicircular block slides to the upper trapezoidal protrusion, the lower trapezoidal protrusion and the lower trapezoidal protrusion. The rightmost end of the protrusion is switched to the movable mold assembly and the fixed mold at the bottom to achieve the purpose of automatic mold closing. After the plastic products of the required specifications are obtained, the servo motor is started to drive the shaft to continue to rotate clockwise. During the process, the semicircular block located at the upper part of the movable mold assembly will move along the other side wall of the upper trapezoidal protrusion under the elastic action of the first spring, and the semicircular block located at the upper part will gradually move to the left. At the same time, the semicircular block located at the lower part of the movable mold assembly will move along the other side wall of the lower trapezoidal protrusion under the elastic action of the first spring, and the semicircular block located at the lower part will gradually move to the left. As the semicircular block gradually moves to the left, the movable mold will automatically move to the left accordingly, which can achieve the purpose of automatic mold separation. The automatic mold closing and mold separation process greatly improves the production efficiency.

[0018] 3. A plastic injection molding device and molding method, through the mutual cooperation between the demolding cylinder assembly, the cleaning cylinder assembly, the air outlet disk assembly and the trapezoidal block, when the movable mold assembly is separated from the fixed mold and the mold is separated, the semicircular block is separated from the upper trapezoidal convex block and the lower trapezoidal convex block without contact, and then the servo motor drives the movable mold mechanism and the fixed mold mechanism to continue to rotate clockwise. During the process, the two connecting blocks slide along the left side wall of the upper limit block and the left side wall of the lower limit block respectively, and then under the action of the trapezoidal block, the ball is gradually pushed to the right, and the disk body, the first piston rod and the first piston move to the right accordingly, pushing the gas in the main cylinder to the right through the first outlet pipe into the air outlet disk assembly The sphere is pushed to the right by the servo motor, and then the disc pushes multiple retaining rings to the right at the same time. The second piston moves to the right accordingly, and the gas in the side cylinder is also pushed into the gas outlet disc assembly through the second gas outlet pipe. Finally, the gas is blown into the moving mold through the gas outlet disc assembly, and the waste remaining in the moving mold is blown out by high-pressure airflow, so as to achieve the purpose of timely and automatic cleaning of the inside of the moving mold, and the use process is convenient.

[0019] 4. A plastic injection molding device and molding method, through the mutual cooperation between the trumpet-shaped mouth, the connecting rod, the blocking block and the fourth spring, when there is no gas blowing to the right from the hollow disk, under the elastic action of the fourth spring, the blocking block is located in the trumpet-shaped mouth and blocks the trumpet-shaped mouth, which can avoid the raw material from entering the air outlet and causing blockage, thereby ensuring the normal flow of gas afterwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention; Figure 2 A three-dimensional diagram of a container box of the present invention; Figure 3 It is an assembly diagram of the containing box, the upper arc plate mechanism, the lower arc plate mechanism and the trapezoidal block of the present invention; Figure 4 is a cutaway perspective view of a container box of the present invention; Figure 5 It is an exploded view of the rotating shaft, the movable mold mechanism and the fixed mold mechanism of the present invention; Figure 6 It is an assembly diagram of the movable mold assembly, the upper arc plate mechanism and the lower arc plate mechanism of the present invention; Figure 7 For the present invention Figure 6 A partial enlarged view of the middle A; Figure 8 A three-dimensional diagram of a movable mold assembly of the present invention; Fig. 9 It is a sectional perspective view of the movable mold assembly of the present invention; Fig.10 An exploded view of the movable mold assembly of the present invention; Fig.11 An exploded view of the demoulding cylinder assembly, the cleaning cylinder assembly and the gas outlet plate assembly of the present invention; Fig.12 is a sectional perspective view of the demoulding cylinder assembly of the present invention; Fig.13 is an exploded view of the cleaning cartridge assembly of the present invention; Fig.14 is a sectional perspective view of the gas outlet plate assembly of the present invention; Fig.15 For the present invention Fig.14 A partial enlarged view of point B in the middle; Fig.16 is a cutaway perspective view of the hollow disk of the present invention; Fig.17 A three-dimensional diagram of a block of the present invention; Fig.18 It is a three-dimensional diagram of the upper arc plate mechanism of the present invention; Fig.19 It is a three-dimensional diagram of the lower arc plate mechanism of the present invention; Fig. 20 It is a three-dimensional diagram of the trapezoidal block of the present invention.

[0021] In the figure: 1, machine base; 2, raw material extrusion mechanism; 3, injection hopper; 4, chassis; 5, containing box; 6, rotating shaft; 7, moving mold mechanism; 71, left connecting frame; 72, left bearing plate; 73, moving mold assembly; 731, square cylinder; 732, side plate; 733, moving mold; 734, cross bar; 735, first spring; 736, semicircular block; 737, demoulding cylinder assembly; 7371, main cylinder; 7372, first piston; 7373, first piston rod; 7374, ball; 7375, disk; 7376, second spring; 7377, first air outlet pipe; 7378, first air inlet pipe; 738, cleaning cylinder assembly; 7381, side cylinder; 7382, second piston; 7383, second piston rod; 7384, Retaining ring; 7385, third spring; 7386, second air outlet pipe; 7387, second air inlet pipe; 739, air outlet plate assembly; 7391, hollow plate; 7392, air outlet; 7393, trumpet-shaped mouth; 7394, support plate; 7395, connecting rod; 7396, blocking block; 7397, fourth spring; 8, fixed mold mechanism; 81, right connecting frame; 82, right bearing plate; 83, fixed mold; 9, upper arc plate mechanism; 91, upper arc plate; 92, upper baffle plate; 93, upper trapezoidal protrusion; 94, upper limit block; 10, lower arc plate mechanism; 101, lower arc plate; 102, lower baffle plate; 103, lower trapezoidal protrusion; 104, lower limit block; 11, trapezoidal block; 12, servo motor; 13, cooling mechanism; 14, discharge cavity. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0023] The present invention provides two technical solutions: like Figures 1 to 5 A first embodiment is shown: a plastic injection molding device, comprising: A machine base 1 is placed on the ground. A raw material extrusion mechanism 2 is arranged on the top right side of the machine base 1. A hopper 3 is arranged on the top of the raw material extrusion mechanism 2. A machine box 4 is arranged on the top left side of the machine base 1. A containing box 5 is fixedly arranged between the front and rear walls of the right part of the inner cavity of the machine box 4. A rotating shaft 6 is rotatably arranged between the left and right side walls of the inner cavity of the containing box 5. A fixed mold mechanism 8 is fixedly sleeved on the outer right side of the rotating shaft 6. An upper arc plate mechanism 9 is fixedly arranged at the lower left part of the inner cavity of the containing box 5. A lower arc plate mechanism 10 located directly below the upper arc plate mechanism 9 is fixedly arranged at the lower left part of the inner cavity of the containing box 5. A trapezoidal block 11 located between the upper arc plate mechanism 9 and the lower arc plate mechanism 10 is fixedly arranged at the lower left part of the inner cavity of the containing box 5. A servo motor 12 is fixedly arranged on the left side of the containing box 5. The output shaft of the servo motor 12 passes through the left wall of the containing box 5 and is fixedly connected to the left end of the rotating shaft 6. A connected discharge cavity 14 is opened between the top and the front end of the machine base 1. The discharge cavity 14 is located directly below the containing box 5. The movable mold mechanism 7 is used in conjunction with the fixed mold mechanism 8. The two together form a cavity to injection mold the required plastic product. The movable mold mechanism 7 is fixedly sleeved on the left side of the outer side of the rotating shaft 6. The inner cavity of the chassis 4 and the left side of the accommodating box 5 are provided with a cooling mechanism 13 for cooling the mold and the plastic product. The movable mold mechanism 7 includes a left connecting frame 71, which is fixedly sleeved on the outside of the rotating shaft 6. A plurality of left supporting plates 72 are evenly and fixedly arranged on the outside of the left connecting frame 71, and a movable mold assembly 73 is penetrated inside each left supporting plate 72.

[0024] Through the mutual cooperation among the movable mold mechanism 7, the fixed mold mechanism 8, the upper arc plate mechanism 9, the lower arc plate mechanism 10, the trapezoidal block 11 and the servo motor 12, since a plurality of movable mold assemblies 73 are arranged on the movable mold mechanism 7, and a plurality of fixed molds 83 are arranged on the fixed mold mechanism 8, the plurality of movable mold assemblies 73 correspond to a plurality of fixed molds 83 one by one, and each movable mold assembly 733 and the fixed mold 83 at the corresponding position jointly form a complete injection mold, and the injection cavity structure inside each injection mold is different, which can achieve the purpose of injection molding plastic products of different specifications, meet the needs of plastic products of various specifications, and has a wide range of uses.

[0025] like Figures 6 to 20A second embodiment is shown, which is mainly different from the first embodiment in that: a plastic injection molding device, a movable mold assembly 73 includes a square cylinder 731, the square cylinder 731 slides through the interior of the left carrier plate 72, side plates 732 are fixedly arranged on the left and right sides of the square cylinder 731, and a movable mold 733 is fixedly arranged on the right side of the right side plate 732 through a plurality of support blocks, and a plurality of cross bars 734 are evenly fixedly arranged between the two side plates 732 and on the outside of the square cylinder 731, and the cross bars 734 slide through the interior of the left carrier plate 72, and the outside of each cross bar 734 is sleeved with a first spring 735, and the first spring 735 is located between the left side of the left carrier plate 72 and the right side of the left side plate 732, and the left side plate 732 The upper and lower ends of the movable mold 733 are fixedly provided with connecting blocks, the left sides of the two connecting blocks are fixedly provided with semicircular blocks 736, a demoulding cylinder assembly 737 located in the square cylinder 731 is passed through the two side plates 732, and a plurality of cleaning cylinder assemblies 738 evenly distributed in a circle outside the demoulding cylinder assembly 737 are passed through the two side plates 732. An air outlet plate assembly 739 is fixedly provided on the left side of the inner cavity of the movable mold 733. The demoulding cylinder assembly 737 includes a main cylinder 7371, which is fixedly connected between the two side plates 732 and located in the square cylinder 731. A first piston 7372 is slidably provided between the inner walls of the main cylinder 7371, and a first piston rod 7373 is fixedly provided on the left side of the first piston 7372. The left end of the first piston rod 7373 slides The left wall of the main cylinder 7371 is penetrated by the movable mold 733 and is fixedly provided with a sphere 7374. The outer fixed sleeve of the first piston rod 7373 is provided with a disk 7375 located between the sphere 7374 and the left side plate 732. The outer sleeve of the first piston rod 7373 is provided with a second spring 7376. The second spring 7376 is located between the disk 7375 and the left side plate 732. The right side of the main cylinder 7371 is fixedly connected with a first air outlet pipe 7377. The right end of the first air outlet pipe 7377 penetrates between the right side plate 732 and the movable mold 733 and is connected to the interior of the air outlet disk assembly 739. The right part of the side wall of the main cylinder 7371 is fixedly connected with a first air inlet pipe 7378. The right end of the first air inlet pipe 7378 penetrates the right side plate 732. Each cleaning cylinder assembly Components 738 all include a side tube 7381, the right side of the side tube 7381 is fixedly connected to the left side wall of the right side plate 732 and is located in the square tube 731, a second piston 7382 is slidably arranged between the inner walls of the side tube 7381, a second piston rod 7383 is fixedly arranged on the left side of the second piston 7382, the left end of the second piston rod 7383 slides through the disc body 7375, the outer sleeve of the second piston rod 7383 is provided with a retaining ring 7384 located between the disc body 7375 and the left side plate 732, the outer sleeve of the second piston rod 7383 is provided with a third spring 7385, the third spring 7385 is located between the retaining ring 7384 and the left side plate 732, the right side of the side tube 7381 is fixedly connected with a second air outlet pipe 7386,The right end of the second air outlet pipe 7386 passes through between the right side plate 732 and the movable mold 733 and is connected to the interior of the air outlet disk assembly 739. The right part of the side tube 7381 away from the main tube 7371 is fixedly connected with the second air inlet pipe 7387. The right end of the second air inlet pipe 7387 passes through the right side plate 732. The first air outlet pipe 7377 and the left part of the second air outlet pipe 7386 are fixedly provided with an air outlet valve. The first air inlet pipe 7378 and the right part of the second air inlet pipe 7387 are fixedly provided with an air inlet valve. The air outlet disk assembly 739 includes a hollow disk 7391. The hollow disk 7391 is fixedly connected to the left side of the inner cavity of the movable mold 733. The right side wall of the inner cavity of the hollow disk 7391 is evenly provided with a plurality of air outlets 739 2. A trumpet-shaped opening 7393 is provided on the right side of each air outlet 7392. A support plate 7394 is fixedly provided between the upper and lower walls of each air outlet 7392. A connecting rod 7395 is slidably penetrated in the middle of the support plate 7394. A blocking block 7396 is fixedly provided on the right end of the connecting rod 7395. The blocking block 7396 is adapted to the trumpet-shaped opening 7393. A blocking block is fixedly provided on the left end of the connecting rod 7395. A fourth spring 7397 located between the support plate 7394 and the blocking block is sleeved on the outside of the connecting rod 7395. The fixed mold mechanism 8 includes a right connecting frame 81. The right connecting frame 81 is fixedly sleeved on the outside of the rotating shaft 6. A plurality of right bearing plates 82 are evenly fixedly provided on the outside of the right connecting frame 81. Each right bearing plate 82 A fixed mold 83 is fixedly arranged on the left side, the right side wall of each right supporting plate 82 contacts the right side wall of the inner cavity of the containing box 5, and a connected injection hole is opened between the middle of the right side of the right supporting plate 82 and the inside of the corresponding fixed mold 83. A plurality of movable molds 733 correspond to a plurality of fixed molds 83 one by one, and each movable mold 733 and the fixed mold 83 at the corresponding position together form a complete injection mold. The injection cavity structure inside each injection mold is different, and is used for injection molding plastic products of different specifications. The upper arc plate mechanism 9 includes an upper arc plate 91, which is fixedly connected to the lower left side of the inner cavity of the containing box 5. An upper baffle plate 92 is fixedly arranged on the right side and the middle of the bottom of the upper arc plate 91, and the upper baffle plate 92 on the left side is fixedly arranged. An upper trapezoidal protrusion 93 is fixedly provided on the right side of 92, an upper limit block 94 is fixedly provided on the left side of the right upper baffle plate 92, and the upper limit block 94 is located in front of the upper trapezoidal protrusion 93. The lower arc plate mechanism 10 includes a lower arc plate 101, which is fixedly connected to the lower left part of the inner cavity of the storage box 5 and is located directly below the upper arc plate 91. The lower baffle plate 102 is fixedly provided on the right side and the middle of the top of the lower arc plate 101. The lower trapezoidal protrusion 103 located directly below the upper trapezoidal protrusion 93 is fixedly provided on the right side of the left lower baffle plate 102, and the lower limit block 104 located directly below the upper limit block 94 is fixedly provided on the left side of the right lower baffle plate 102. The trapezoidal block 11 is located between the upper limit block 94 and the lower limit block 104.

[0026] The required movable mold assembly 73 and fixed mold 83 are rotated to the lowest position through the cooperation among the square cylinder 731, the side plate 732, the cross bar 734, the first spring 735, the semicircular block 736, the upper trapezoidal protrusion 93 and the lower trapezoidal protrusion 103. During the process, the semicircular block 736 located at the upper part of the movable mold assembly 73 will move along the side wall of the upper trapezoidal protrusion 93, and the upper trapezoidal protrusion 93 will gradually push the semicircular block 736 located at the upper part to the right. At the same time, the semicircular block 736 located at the lower part of the movable mold assembly 73 will move along the side wall of the lower trapezoidal protrusion 103, and the lower trapezoidal protrusion 103 will gradually push the semicircular block 736 located at the lower part to the right. While the semicircular block 736 is pushed to the right, the square cylinder 731 moves along the inner wall of the left supporting plate 72. When the upper and lower parts of the movable mold assembly 73 slide to the right at the same time, the movable mold 733 can be automatically pushed to the right until the semicircular block 736 slides to the rightmost end of the upper trapezoidal protrusion 93 and the lower trapezoidal protrusion 103. The movable mold assembly 73 and the fixed mold 83 switched to the bottom can achieve the purpose of automatic mold closing. After the plastic product of the required specifications is obtained, the servo motor 12 is started to drive the rotating shaft 6 to continue to rotate clockwise. During the process, the semicircular block 736 located at the upper part of the movable mold assembly 73 will move along the other side wall of the upper trapezoidal protrusion 93 under the elastic action of the first spring 735, and the semicircular block 736 located at the upper part will gradually move to the left. At the same time, the semicircular block 736 located at the lower part of the movable mold assembly 73 will move along the other side wall of the lower trapezoidal protrusion 103 under the elastic action of the first spring 735. The side wall moves, and the semicircular block 736 at the bottom gradually moves to the left. When the semicircular block 736 gradually moves to the left, the movable mold 733 automatically moves to the left, which can achieve the purpose of automatic mold separation. The automatic mold closing and mold separation process greatly improves the production efficiency. Through the mutual cooperation between the demolding cylinder assembly 737, the cleaning cylinder assembly 738, the air outlet plate assembly 739 and the trapezoidal block 11, when the movable mold assembly 73 and the fixed mold 83 are separated and the mold separation is completed, the semicircular block 736 is separated from the upper trapezoidal protrusion 93 and the lower trapezoidal protrusion 103 without contact. Then the servo motor 12 drives the movable mold mechanism 7 and the fixed mold mechanism 8 to continue to rotate clockwise. During the process, the two connecting blocks slide along the left wall of the upper limit block 94 and the left wall of the lower limit block 104 respectively. The spherical body 7374 is gradually pushed to the right by the action of the trapezoidal block 11, and the disc body 7375, the first piston rod 7373 and the first piston 7372 are moved to the right accordingly, and the gas in the main cylinder 7371 is pushed to the right into the gas outlet disc assembly 739 through the first gas outlet pipe 7377, and finally blown into the movable mold 733 through the gas outlet disc assembly 739, and the plastic product in the movable mold 733 can be blown to the right by the air flow, so as to realize the purpose of automatic demoulding, and the servo motor 12 continues to drive the movable mold mechanism 7 and the fixed mold mechanism 8 to rotate clockwise. In the process, the spherical body 7374 is continuously pushed to the right by the action of the trapezoidal block 11, and then the disc body 7375 pushes multiple retaining rings 7384 to the right at the same time, and the second piston 7382 is moved to the right accordingly.The gas in the side tube 7381 is also pushed into the gas outlet disk assembly 739 through the second gas outlet pipe 7386, and finally blown into the movable mold 733 through the gas outlet disk assembly 739. The residual waste in the movable mold 733 is blown out by high-pressure airflow, so that the purpose of timely and automatic cleaning of the interior of the movable mold 733 can be achieved. The use process is convenient. Through the mutual cooperation between the trumpet-shaped mouth 7393, the connecting rod 7395, the blocking block 7396 and the fourth spring 7397, when there is no gas blowing to the right from the hollow disk 7391, under the elastic action of the fourth spring 7397, the blocking block 7396 is located in the trumpet-shaped mouth 7393, and the trumpet-shaped mouth 7393 is blocked, which can prevent the raw material from entering the gas outlet 7392 and causing blockage, thereby ensuring the normal flow of gas afterwards.

[0027] The embodiment of the present invention further provides a plastic injection molding method, using a plastic injection molding device, and the specific method includes the following steps: Step 1: Start the servo motor 12 to drive the rotating shaft 6 to rotate clockwise, and the movable mold mechanism 7 and the fixed mold mechanism 8 rotate accordingly, and rotate the required movable mold assembly 73 and the fixed mold 83 to the bottom. Since the left end of the raw material extrusion mechanism 2 is fixedly connected to the lower right part of the containing box 5, when the required movable mold assembly 73 and the fixed mold 83 rotate to the bottom, the servo motor 12 stops working. At the same time, under the action of the upper arc plate mechanism 9 and the lower arc plate mechanism 10, the movable mold assembly 73 is pushed to the right, so that the right side of the movable mold assembly 73 contacts the left side of the fixed mold 83, and the mold is closed; Step 2: Then, the granular plastic waste raw material is put into the injection hopper 3, and then the plastic waste raw material is pressurized and melted under the action of the raw material extrusion mechanism 2, wherein the raw material extrusion mechanism 2 belongs to the prior art known to those skilled in the art, and the raw material extrusion mechanism 2 is mainly composed of a heating cylinder, a screw and a driving mechanism, and the driving mechanism provides power to drive the screw to rotate, so as to transport the plastic waste raw material into the heating cylinder, pressurize and melt the raw material, and the melted raw material is then injected into the fixed mold 83 and the movable mold assembly 73 located at the bottom by the raw material extrusion mechanism 2 through the injection hole, and then the cooling mechanism 13 works to control the volume The temperature in the nano box 5 cools and solidifies the raw materials between the movable mold assembly 73 and the fixed mold 83 to obtain a plastic product of the required specifications, wherein the cooling mechanism 13 belongs to the prior art known to those skilled in the art. Then, the servo motor 12 is started again to drive the rotating shaft 6 to continue to rotate clockwise, and the movable mold mechanism 7 and the fixed mold mechanism 8 rotate accordingly. During the process, with the cooperation of the upper arc plate mechanism 9, the lower arc plate mechanism 10 and the trapezoidal block 11, the movable mold assembly 73 gradually moves to the left, and the right side of the movable mold assembly 73 is separated from the left side of the fixed mold 83, and the mold is automatically separated. At the same time, the plastic product moves with the movable mold assembly 73; Step three, then the interior of the movable mold assembly 73 generates gas of a first preset pressure value blowing toward the right, and under the blowing of the airflow, the plastic product located inside the movable mold assembly 73 is blown out to the right, completing automatic demolding, and the blown plastic product falls into the discharge cavity 14 directly below under the action of its own gravity, and then the interior of the movable mold assembly 73 generates gas of a second preset pressure value blowing toward the right, and the second preset pressure value is much larger than the first preset pressure value. During the process of the gas of the second preset pressure value blowing toward the right, the waste remaining in the movable mold assembly 73 is blown out, completing automatic cleaning, and then starting the servo motor 12 to drive the rotating shaft 6 to rotate counterclockwise, and rotating the movable mold assembly 73 and the fixed mold 83 to the bottom again, and performing the next round of injection molding operation.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic injection molding device, characterized in that: include: A machine base (1) is placed on the ground. A raw material extrusion mechanism (2) is arranged on the right side of the top of the machine base (1). A material injection hopper (3) is arranged on the top of the raw material extrusion mechanism (2). A machine box (4) is arranged on the left side of the top of the machine base (1). A containing box (5) is fixedly arranged between the front and rear walls of the right part of the inner cavity of the machine box (4). A rotating shaft (6) is rotatably arranged between the left and right side walls of the inner cavity of the containing box (5). A fixed mold mechanism (8) is fixedly sleeved on the right side of the outer side of the rotating shaft (6). An upper arc plate mechanism (9) is fixedly arranged at the lower left part of the inner cavity of the containing box (5). The containing box (5) A lower arc plate mechanism (10) located directly below the upper arc plate mechanism (9) is fixedly arranged at the lower left side of the inner cavity of the storage box (5); a trapezoidal block (11) located between the upper arc plate mechanism (9) and the lower arc plate mechanism (10) is fixedly arranged at the lower left side of the inner cavity of the storage box (5); a servo motor (12) is fixedly arranged on the left side of the storage box (5); an output shaft of the servo motor (12) passes through the left wall of the storage box (5) and is fixedly connected to the left end of the rotating shaft (6); a discharge cavity (14) is provided between the top and the front end of the machine base (1); and the discharge cavity (14) is located directly below the storage box (5); The movable mold mechanism (7) is used in conjunction with the fixed mold mechanism (8), and the two together form a mold cavity for injection molding the desired plastic product. The movable mold mechanism (7) is fixedly sleeved on the left side of the outside of the rotating shaft (6), and a cooling mechanism (13) for cooling the mold and the plastic product is provided in the inner cavity of the chassis (4) and on the left side of the containing box (5).

2. A plastic injection molding device according to claim 1, characterized in that: The movable mold mechanism (7) comprises a left connecting frame (71), the left connecting frame (71) being fixedly sleeved on the outside of the rotating shaft (6), a plurality of left supporting plates (72) being evenly and fixedly arranged on the outside of the left connecting frame (71), and a movable mold assembly (73) passing through the inside of each left supporting plate (72).

3. A plastic injection molding device according to claim 2, characterized in that: The movable mold assembly (73) comprises a square cylinder (731), the square cylinder (731) slides through the interior of the left bearing plate (72), side plates (732) are fixedly arranged on both the left and right sides of the square cylinder (731), the right side of the right side plate (732) is fixedly arranged with a movable mold (733) through a plurality of support blocks, a plurality of cross bars (734) are evenly fixedly arranged between the two side plates (732) and located outside the square cylinder (731), the cross bars (734) slide through the interior of the left bearing plate (72), and the outside of each cross bar (734) is sleeved with a first spring (735) ), the first spring (735) is located between the left side of the left supporting plate (72) and the right side of the left side plate (732), the upper and lower ends of the left side plate (732) are fixedly provided with connecting blocks, the left sides of the two connecting blocks are fixedly provided with semicircular blocks (736), a demoulding cylinder assembly (737) located in the square cylinder (731) is passed through between the two side plates (732), a plurality of cleaning cylinder assemblies (738) evenly distributed in a circle outside the demoulding cylinder assembly (737) are passed through between the two side plates (732), and an air outlet plate assembly (739) is fixedly provided on the left side of the inner cavity of the movable mold (733).

4. A plastic injection molding device according to claim 3, characterized in that: The demoulding cylinder assembly (737) comprises a main cylinder (7371), wherein the main cylinder (7371) is fixedly connected between two side plates (732) and is located in the square cylinder (731), a first piston (7372) is slidably arranged between the inner walls of the main cylinder (7371), a first piston rod (7373) is fixedly arranged on the left side of the first piston (7372), the left end of the first piston rod (7373) slides through the left wall of the main cylinder (7371) and is fixedly arranged with a ball (7374), and the outer fixed sleeve of the first piston rod (7373) is provided with a disk (7374) located between the ball (7374) and the left side plate (732). 7375), the first piston rod (7373) is externally sleeved with a second spring (7376), the second spring (7376) is located between the disc body (7375) and the left side plate (732), the right side of the main cylinder (7371) is fixedly connected with a first air outlet pipe (7377), the right end of the first air outlet pipe (7377) passes through between the right side plate (732) and the movable mold (733) and is connected to the interior of the air outlet disc assembly (739), the right side of the side wall of the main cylinder (7371) is fixedly connected with a first air inlet pipe (7378), the right end of the first air inlet pipe (7378) passes through the right side plate (732).

5. A plastic injection molding device according to claim 4, characterized in that: Each cleaning cylinder assembly (738) comprises a side cylinder (7381), the right side of which is fixedly connected to the left side wall of the right side plate (732) and is located in the square cylinder (731), a second piston (7382) is slidably arranged between the inner walls of the side cylinder (7381), a second piston rod (7383) is fixedly arranged on the left side of the second piston (7382), the left end of the second piston rod (7383) slides through the disc body (7375), the outer fixed sleeve of the second piston rod (7383) is provided with a retaining ring (7384) located between the disc body (7375) and the left side plate (732), the outer sleeve of the second piston rod (7383) is provided with a third spring (7385), the third spring (738 5) Located between the retaining ring (7384) and the left side plate (732), the right side of the side tube (7381) is fixedly connected to a second air outlet pipe (7386), the right end of the second air outlet pipe (7386) passes through between the right side plate (732) and the movable mold (733) and is connected to the interior of the air outlet disk assembly (739), and the right side of the side tube (7381) away from the main tube (7371) is fixedly connected to a second air inlet pipe (7387), the right end of the second air inlet pipe (7387) passes through the right side plate (732), the left parts of the first air outlet pipe (7377) and the second air outlet pipe (7386) are fixedly provided with air outlet valves, and the right parts of the first air inlet pipe (7378) and the second air inlet pipe (7387) are fixedly provided with air inlet valves.

6. A plastic injection molding device according to claim 3, characterized in that: The air outlet disk assembly (739) comprises a hollow disk (7391), wherein the hollow disk (7391) is fixedly connected to the left side of the inner cavity of the movable mold (733), and a plurality of air outlets (7392) are evenly arranged on the right side wall of the inner cavity of the hollow disk (7391), and a trumpet-shaped opening (7393) is arranged on the right side of each of the air outlets (7392), and a support plate (7394) is fixedly arranged between the upper and lower walls of each of the air outlets (7392), and a connecting rod (7395) is slidably penetrated in the middle of the supporting plate (7394), and a blocking block (7396) is fixedly arranged at the right end of the connecting rod (7395), and the blocking block (7396) is matched with the trumpet-shaped opening (7393), and a stopper is fixedly arranged at the left end of the connecting rod (7395), and the outer part of the connecting rod (7395) is sleeved with a fourth spring (7397) located between the supporting plate (7394) and the stopper.

7. A plastic injection molding device according to claim 3, characterized in that: The fixed mold mechanism (8) comprises a right connecting frame (81), the right connecting frame (81) being fixedly sleeved on the outside of the rotating shaft (6), a plurality of right bearing plates (82) being evenly fixedly arranged on the outside of the right connecting frame (81), a fixed mold (83) being fixedly arranged on the left side of each right bearing plate (82), a right side wall of each right bearing plate (82) being in contact with the right side wall of the inner cavity of the containing box (5), a connected injection hole being provided between the middle of the right side of the right bearing plate (82) and the inside of the corresponding fixed mold (83), a plurality of the movable molds (733) corresponding to a plurality of the fixed molds (83) one by one, each of the movable molds (733) and the fixed mold (83) at the corresponding position together forming a complete injection mold, the injection cavity structure inside each injection mold being different, and being used for injection molding plastic products of different specifications.

8. A plastic injection molding device according to claim 1, characterized in that: The upper arc plate mechanism (9) comprises an upper arc plate (91), the upper arc plate (91) being fixedly connected to the lower left side of the inner cavity of the containing box (5), an upper baffle plate (92) being fixedly arranged on the right side and the middle of the bottom of the upper arc plate (91), an upper trapezoidal protrusion (93) being fixedly arranged on the right side of the left upper baffle plate (92), and an upper limit block (94) being fixedly arranged on the left side of the right upper baffle plate (92), the upper limit block (94) being located in front of the upper trapezoidal protrusion (93).

9. A plastic injection molding device according to claim 8, characterized in that: The lower arc plate mechanism (10) comprises a lower arc plate (101), the lower arc plate (101) being fixedly connected to the lower left side of the inner cavity of the containing box (5) and being located directly below the upper arc plate (91), a lower baffle plate (102) being fixedly arranged on the right side and the middle of the top of the lower arc plate (101), a lower trapezoidal protrusion (103) being fixedly arranged on the right side of the left lower baffle plate (102) and being located directly below the upper trapezoidal protrusion (93), a lower limit block (104) being fixedly arranged on the left side of the right lower baffle plate (102) and being located directly below the upper limit block (94), and the trapezoidal block (11) being located between the upper limit block (94) and the lower limit block (104).

10. A plastic injection molding method, characterized in that: Using the plastic injection molding device as claimed in claim 7, the method comprises the following steps: Step 1: Start the servo motor (12) to drive the rotating shaft (6) to rotate clockwise, and the movable mold mechanism (7) and the fixed mold mechanism (8) rotate accordingly, and rotate the required movable mold assembly (73) and the fixed mold (83) to the bottom. Since the left end of the raw material extrusion mechanism (2) is fixedly connected to the lower right side of the containing box (5), when the required movable mold assembly (73) and the fixed mold (83) are rotated to the bottom, the servo motor (12) stops working, and at the same time, under the action of the upper arc plate mechanism (9) and the lower arc plate mechanism (10), the movable mold assembly (73) is pushed to the right, so that the right side of the movable mold assembly (73) contacts the left side of the fixed mold (83), and the mold is closed; Step 2: Then, the granular plastic waste raw material is put into the injection hopper (3), and then, under the action of the raw material extrusion mechanism (2), the plastic waste raw material is pressurized and melted, and the melted raw material is then transported by the raw material extrusion mechanism (2) to the interior of the fixed mold (83) and the movable mold assembly (73) located at the bottom, and then the cooling mechanism (13) works to control the temperature in the containing box (5) so that the raw material between the movable mold assembly (73) and the fixed mold (83) is cooled and solidified, so as to obtain a plastic product of the required specifications, and then the servo motor (12) is started again to drive the rotating shaft (6) to continue to rotate clockwise, and the movable mold mechanism (7) and the fixed mold mechanism (8) rotate accordingly. During the process, under the cooperation of the upper arc plate mechanism (9), the lower arc plate mechanism (10) and the trapezoidal block (11), the movable mold assembly (73) gradually moves to the left, and the right side of the movable mold assembly (73) is separated from the left side of the fixed mold (83), and the mold is automatically separated, and at the same time, the plastic product moves with the movable mold assembly (73); Step 3: Then, gas of a first preset pressure value is generated inside the movable mold assembly (73) and blows rightward. Under the blowing of the airflow, the plastic product inside the movable mold assembly (73) is blown out to the right, completing automatic demoulding. The blown plastic product falls into the discharge cavity (14) directly below under the action of its own gravity. Then, gas of a second preset pressure value is generated inside the movable mold assembly (73) and blows rightward. During the blowing of the gas of the second preset pressure value to the right, the waste material remaining inside the movable mold assembly (73) is blown out, completing automatic cleaning. Then, the servo motor (12) is started to drive the rotating shaft (6) to rotate counterclockwise, and the movable mold assembly (73) and the fixed mold (83) are rotated to the bottom again to perform the next round of injection molding operation.

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