High-speed rotary multi-mold blow molding production line

Abstract

The invention belongs to the technical field of blow molding production equipment, and relates to a high-speed rotary multi-mold blow molding production line. Comprising an automatic feeding mechanism, a heating feeding mechanism, a material pipe forming die head, a material pipe cutting and sealing mechanism, a multi-station forming mechanism, a part taking mechanical arm, a formed part lower part material edge removing mechanism and a formed part upper part material edge removing mechanism which are sequentially connected according to production procedures. The multi-station forming mechanism comprises a rotary table base, a rotary table, a plurality of groups of mold closing devices, a plurality of groups of air blowing devices, a rotary table driving mechanism, a mold closing device radial movement driving mechanism and a water-gas-electricity-oil integrated supply device; a plurality of mold combination devices are uniformly distributed on the circumference of the upper end of the rotary table bottom plate; a group of blowing devices is mounted at the lower end of the rotary table top plate corresponding to the upper part of each mold combination device; the water-gas-electricity-oil integrated supply device is installed in the center of the rotary table in a columnar mode and used for supplying water, electricity, oil and gas to the rotary part of the multi-station forming mechanism. According to the invention, high-efficiency and high-quality production of blow-molded parts is realized.

Description

Technical Field

[0001] This invention belongs to the technical field of blow molding production equipment, specifically relating to a high-speed rotary multi-mold blow molding production line. Background Technology

[0002] Many everyday items are manufactured using blow molding, such as drinking water bottles and laundry detergent containers. The molding process for these products involves melting granular plastic and feeding it into a tube forming mold to create a hollow tube. The hollow tube is then dropped into the cavity of the mold and cut. By blowing air into the cavity, the tube adheres to the surface of the cavity, thus achieving blow molding.

[0003] Existing blow molding equipment typically employs single-station or dual-station molding methods, with the stations moving via linear reciprocating motion. Furthermore, after blow molding, the product generally requires manual transfer to different trimming devices to remove the material edges. This results in low production efficiency. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by proposing a high-speed rotary multi-mold blow molding production line with high production efficiency and good finished product molding quality.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution: A high-speed rotary multi-mold blow molding production line includes an automatic feeding mechanism, a heating and feeding mechanism, a tube forming die head, a tube cutting and sealing mechanism, a multi-station forming mechanism, a part picking robot, a part lower edge removal mechanism, and a part upper edge removal mechanism, which are connected sequentially according to the production process. The multi-station molding mechanism includes a turntable base, a turntable, multiple mold assembly devices, multiple air blowing devices, a turntable drive mechanism, a radial movement drive mechanism for the mold closing device, and an integrated water, air, electricity, and oil supply device; the turntable is coaxially supported on the top of the base; multiple mold assembly devices are evenly distributed along the circumferential direction on the upper end of the turntable base plate, and the multiple mold assembly devices are slidable along the radial direction of the turntable. A set of air blowing devices is installed at the lower end of the turntable top plate, corresponding to the upper part of each mold assembly. The turntable drive mechanism is used to drive the turntable to rotate the multiple mold assemblies in the circumferential direction. The mold closing device radial movement drive mechanism is used to enable the mold closing device to move radially to the outer working position when it rotates to the position below the material tube forming die head, and to receive the material tube through the opened mold closing cavity. When the mold closing device moves to other working positions, the air inlet at the upper end of the material tube in the mold closing cavity is aligned vertically with the lower end of the corresponding air blowing device. The working position aligned with the material tube forming die head is the material receiving working position, and the working position adjacent to the material receiving working position in the rotation direction is the qualified product unloading working position. The integrated water, gas, electricity, and oil supply device is installed in a columnar manner at the center of the turntable and is used to supply water, electricity, oil, and gas to the rotating part of the multi-station forming mechanism.

[0006] Moreover, the heating and feeding mechanism is used to heat the plastic granules input by the automatic feeding mechanism to form molten raw materials, and to transport them to the upper feed port position of the material tube forming die head. The heating and feeding mechanism adopts an auger-type conveying mechanism, with a total of three sets of conveying augers. The drive motor of each set of conveying augers is located at the rear end. A discharge funnel is vertically fixed at the upper part of the outer shell of each set of conveying augers near the rear end. The discharge funnel is used to temporarily store the granular raw materials conveyed by the automatic feeding mechanism and to drop the granular raw materials into the conveying auger through the lower port. A heating structure is wrapped around the outer shell of each set of conveying augers. The heating and feeding mechanism is fixedly installed on the feeding platform, which is located above the feeding frame. The rear end of the feeding platform is hinged to the feeding frame. The lower front end of the feeding platform is connected to the feeding frame through a lifting mechanism. The lifting mechanism is used to drive the feeding platform to swing up and down around the hinge point between it and the feeding frame.

[0007] Moreover, the forming die head is fixedly installed on the front end of the feeding platform by a die head bracket, and its lower end is provided with multiple parallel discharge ports, each of which outputs a single extruded forming die head. The tube forming die head includes a die head frame, an outer die sleeve, an outer die sleeve support, a die core, a die core outer sleeve, and a weight adjustment mechanism; one outer die sleeve and one die core work together to form a forming module, and the weight adjustment mechanism is used to achieve precise adjustment of the wall thickness of the formed tube. The die head frame includes an upper die head frame, a middle die head frame, and a lower die head frame; the upper die head frame, the middle die head frame, and the lower die head frame are arranged vertically in sequence; the upper die head frame is fixedly connected to the front end of the die head support; the upper die head frame and the lower die head frame are fixedly connected by multiple isolation support columns, and the middle die head frame is slidably connected to the multiple isolation support columns by linear bearings; a die head drive cylinder is vertically installed on the upper die head frame, and the lower cylinder rod end of the die head drive cylinder is fixedly connected to the upper end of the middle die head frame through an intermediate connector; The middle die head frame adopts a box-type die head frame; the lower die head frame is provided with a liquid input channel, which is connected to the feeding interface located on the side of the lower die head frame. The mold core sleeve is fixed to the lower end of the lower mold head frame, and the upper part of the mold core is inserted into the inner hole of the mold core sleeve, forming a feeding cavity that communicates with the liquid input channel on the lower mold head frame. The outer mold sleeve bracket is mounted and fitted with the lower mold head frame in a vertically movable manner. A nut is fixed at the top of the outer mold sleeve bracket, and its bottom is fixedly connected to the upper end of the outer mold sleeve. The nut is connected to the lower end of a drive shaft by a thread. The upper end of the outer mold sleeve is fixedly connected to the lower end of the outer mold sleeve bracket, and is fitted with the lower part of the mold core with a gap, forming a material tube forming cavity between the two. The material tube forming cavity is an annular cavity with a gradually decreasing gap from top to bottom. The material tube forming cavity and the material discharge cavity are sealed and connected from top to bottom. The weight adjustment mechanism adopts a worm gear transmission mechanism. The worm gear is set in the inner cavity of the middle die head frame. The worm gear is coaxially and fixedly connected to the upper end of the transmission shaft. The two shaft ends of the worm are rotatably supported and engaged with the front and rear side walls of the middle die head frame and mesh with the worm gear. The front part of the front shaft end of the worm extends out from the front side of the middle die head frame and is equipped with an adjustment handwheel.

[0008] Furthermore, the tube cutting and sealing mechanism is located below the tube forming die head; the tube cutting and sealing mechanism includes a knife support, two knife holders, two pairs of cutting blades, two sealing pressure plates, and a cutting drive mechanism; the knife support is fixed on the front extension frame of the feeder frame, and a material passage hole is provided on the knife support at a position directly below the outlet of the tube forming die head; the two knife holders are slidably mounted on the upper end of the knife support corresponding to the material passage hole via linear guide pairs, and two pairs of cutting blades are mounted opposite each other on the lower inner side of the two knife holders, and two sealing pressure plates are mounted opposite each other on the upper inner side of the two knife holders; the cutting drive mechanism is used to drive the two knife holders to move towards each other, realizing the cutting of the tube and the sealing of the upper part of the cut end; the cutting drive mechanism adopts a cutting gear and double rack meshing structure, the cutting gear meshes with two racks set on both sides, the two racks are fixedly connected to the two knife holders respectively, and one of the knife holders is connected to the cylinder rod end of a drive cylinder.

[0009] Furthermore, the turntable drive mechanism includes a turntable servo motor, a gear, and a gear ring. The turntable servo motor is fixedly installed on the lower part of the base, and the upper output end of the turntable servo motor is fixedly connected to the gear. The gear meshes with the gear ring, and the gear ring is coaxially fixed to the lower end of the turntable base plate. The radial movement drive mechanism of the mold clamping device adopts a cam and roller cooperation structure. The cam is fixedly installed at the top center of the turntable base and embedded in the reserved center hole on the turntable base plate. The cam adopts a geometric closed cam with a closed curved groove on the upper end face. Rollers are rotatably installed on the inner end of the base plate of each mold clamping device through rollers, and the rollers are rotatably embedded in the closed curved groove on the cam.

[0010] In addition, each mold assembly also includes two opposing mold-closing modules, a mold-closing module guide support mechanism, and a mold-opening and closing drive motor for realizing the relative movement of the two mold-closing modules; The mold-closing module guide support mechanism includes a first end plate, a second end plate, a middle plate, and four support guide rods. The first end plate, second end plate, and middle plate are all vertical plates. From one end to the other, the first end plate, middle plate, and second end plate are parallel and perpendicularly arranged on the base plate of the mold-closing shaft. Shaft through holes are provided at the upper and lower positions near the left and right ends of the first end plate, the middle plate, and the second end plate. The four shaft through holes on the first end plate, the middle plate, and the second end plate are all aligned. The four support guide rods are distributed and inserted into the four corresponding shaft through holes. The four support guide rods are fixedly connected to the first end plate and the second end plate, and slidably connected to the middle plate via linear bearings. Shaft support seats are fixedly installed at the upper part of the base plate near the left and right sides. The support guide shafts located at the lower part of the left and right sides are axially movable and mounted on the two shaft support seats on the corresponding sides. Two assemblies are mounted opposite each other on the side of the middle plate and the side of the first end plate, and a mold cavity is provided on the opposite side of the assemblies; when the two assemblies come into contact, a complete molding cavity is formed inside them. The mold opening and closing drive includes a mold closing cylinder, which is fixedly installed on the second end plate. The power output end of the mold opening and closing drive is driven to one side of the intermediate plate opposite to the mold closing module.

[0011] Moreover, the integrated water, gas, electricity and oil supply device includes a water supply unit, a gas supply unit, an electricity supply unit and an oil supply unit; The water supply unit includes an inlet connector, a return connector, and an inlet / return water integrator. The inlet / return water integrator has an upper and lower sealed, spaced-apart return water chamber and an inlet water chamber. Multiple return water inlets are evenly distributed circumferentially on the outer wall of the return water chamber, and these inlets are connected to return water inlets on the assembly modules of the multi-module assembly via pipes. Multiple outlet water inlets are evenly distributed circumferentially on the outer wall of the inlet water chamber, and these outlet water inlets are connected to inlet water inlets on the assembly modules of the multi-module assembly via pipes. The return water connector and the inlet connector are fitted together with a central gap to form an inlet / return water connector assembly. The central part of the assembly is the inlet water passage, and the outer periphery is the return water annular cavity. The inlet / return water connector assembly is a fixed component, and the inlet / return water integrator is a rotating component. It is rotatably connected to the bottom of the inlet / return water connector assembly, and the return water annular cavity is sealed and connected to the return water chamber. The inlet water passage is connected to the inlet water chamber. The air supply unit includes an air storage tank, which is fixedly installed at the lower end of the inlet and outlet water integrator. An air storage chamber is provided inside the air storage tank. Multiple air outlets are evenly distributed along the circumference on the outer side wall of the air storage tank. The multiple air outlets are connected to the air inlets of multiple sets of air blowing devices through their respective air pipes. An air inlet is provided at the center of the bottom of the air storage tank. The power supply unit is located below the gas storage tank and includes an internally and externally arranged electrical rotary inlet section and an electrical rotary outlet section. The electrical rotary outlet section is a rotating component, and the electrical rotary inlet section is a fixed component. The oil supply unit includes an outer fixed part, an inner rotating part, a main oil inlet A, a main oil return inlet A, an oil inlet B, and an oil return inlet B. The upper end of the outer fixed part is coaxially and fixedly connected to the lower end of the electric rotary inlet part. The outer fixed part is connected to the main oil inlet A and the main oil return inlet A. The inner rotating part is connected to the oil inlet B and the oil return inlet B. The upper end of the inner rotating part is fixedly connected to the lower center of the gas storage tank and is fixedly inserted into the electric rotary outlet part. The main oil inlet A is connected to the oil inlet B through the inner rotating part, and the main oil return port A is connected to the oil return port B through the inner rotating part. The oil inlet B is connected to the oil inlet of the mold closing cylinder of the multi-combination mold device through the oil inlet pipe, and the oil return port B is connected to the oil return port of the mold closing cylinder of the multi-combination mold device through the oil return pipe. An air inlet hole is provided in the center of the inner rotating part. The upper end of the air inlet hole is sealed and connected to the air inlet at the lower end of the air tank, and the lower end of the air inlet hole is the starting air inlet.

[0012] Furthermore, the part-receiving robot is used to receive the molded plastic part from below when the corresponding mold closing device rotates to the unloading station; the part-receiving robot includes a vertically arranged linear module, a cantilever arm, and a receiving groove; the cantilever arm is L-shaped, with its front end of the horizontal arm fixedly connected to the slider on the back of the linear module, and its lower end of the vertical arm fixedly connected to the upper rear end of the horizontal arm; the vertical arm is composed of a top plate, a top plate, and four support rods connecting the bottom plate and the top plate; the receiving groove is composed of a groove bottom, a front baffle, and a rear baffle, forming an upper cavity and a lower cavity inside, the upper cavity being the cavity for receiving the molded plastic part, and the lower cavity being the cavity for receiving the lower material edge; a connecting relief groove B is provided on the rear baffle and the groove bottom corresponding to the relief groove on the top plate.

[0013] Furthermore, the lower edge removal mechanism for the molded part is used to remove the lower edge of the plastic part by clamping the plastic part on both sides and removing it from both sides. The lower edge removal mechanism for the molded part consists of a base plate, a front platform and a rear platform that are supported at the same height above the base plate, two sets of plastic part clamping assemblies that are installed opposite to each other on the front platform and the rear platform, and two sets of lower edge removal assemblies that are installed opposite to each other on the base plate and located below the front platform and the rear platform, respectively. A material passage gap is provided between the front platform and the rear platform for the lower edge gap of the molded plastic part to pass through. The two sets of plastic part clamping assemblies are each composed of a clamping frame set on the inner side and a clamping drive component connected to the outer side of the clamping frame. The clamping frame is used to clamp the upper and lower positions of the molded plastic part and adopts the form of clamping notches. The number of clamping notches is consistent with the number of mold cavities of the mold closing device. The two sets of lower material edge removal components consist of an edge removal block located on the inner side and an edge removal drive component connected to the outer side of the edge removal block. After the two sets of plastic part clamping components clamp and fix the molded plastic part, the edge removal blocks on both sides move towards each other under the action of their respective edge removal drive components. First, the lower material edge of the plastic part is clamped and fixed. Then, the blanking plate of the molded plastic part, which is clamped by the edge removal blocks on both sides, is shifted to one side to separate the lower material edge from the molded plastic part body and complete the removal of the blanking plate. The lower material edge removal mechanism and the part picking robot convey the molded plastic parts through a rear-mounted vertical belt conveyor.

[0014] Furthermore, the upper edge removal mechanism for the molded part is used to remove the upper and lower edges of the plastic part by clamping the plastic part from both sides and removing it from one side. The upper edge removal mechanism for the molded part includes a frame, a guide rail support, a plastic part clamping and positioning mechanism, and a single-sided edge removal execution mechanism. The plastic part clamping and positioning mechanism consists of clamping assemblies arranged on both sides. The guide rail support is fixedly installed on the upper surface of the frame. Two guide rails extending left and right are arranged on the guide rail support. The clamping assemblies on both sides are connected to the two ends of the two guide rails through their respective slides. A clamping drive cylinder is connected to the outer side of each slide. A positioning clamping block is connected to the inner side of each slide through multiple support rods. The shape of the inner positioning surface of the positioning clamping block on both sides matches the shape of the corresponding side of the molded plastic part. Through the cooperation of the positioning clamping blocks on both sides, the molded plastic part is clamped. The single-sided edge-removing actuator is located on the inner side of one side of the slide and includes an edge-removing drive cylinder, an edge-removing push block, and a push block bracket. The edge-removing drive cylinder is vertically fixedly connected to the inner side of the corresponding side slide. The outer middle part of the push block bracket is fixedly connected to the cylinder rod end of the edge-removing drive cylinder. The inner side of the push block bracket is vertically fixedly connected to the outer end of the edge-removing push block. The inner end of the edge-removing push block is the edge-removing action end, and the shape of the inner end of the edge-removing push block matches the shape of the material edge on the upper part of the molded plastic part. Two guide rods are vertically fixed on the inner side of the slide on the side where the single-sided edge-removing actuator is located. The two guide rods are respectively located on both sides of the edge-removing drive cylinder. Two guide holes are provided on the push block bracket, and guide sleeves are fixedly installed in the two guide holes. The push block bracket forms a supporting and guiding cooperation with the two guide rods through the two guide sleeves.

[0015] The advantages and positive effects of this invention are as follows: 1. The multi-mold blow molding production line of the present invention is sequentially connected according to the production process, including an automatic feeding mechanism, a heating and feeding mechanism, a tube forming die head, a tube cutting and sealing mechanism, a multi-station forming mechanism, a part picking robot, a material edge removal mechanism for the lower part of the molded part, and a material edge removal mechanism for the upper part of the molded part. It realizes fully automated production from granular raw materials to molded plastic parts. The setting of the forming mechanism of the multi-station turntable can realize the arrangement of multiple mold closing devices for forming along the circumferential direction on the turntable. Through the intermittent high-speed continuous movement of the turntable, the production efficiency of blow molded parts can be greatly improved.

[0016] 2. This invention concentrates water, gas, electricity and oil supply in the rotation center of the turntable, which can supply water, gas, electricity and oil to the rotating part of the multi-station forming mechanism. This achieves a reasonable spatial layout of pipelines and lines, saves space, and ensures the high-speed rotation operation of the multi-station forming mechanism.

[0017] 3. The tube forming die head of this invention adopts a worm gear and worm shaft matching structure for weight adjustment. Based on the large transmission ratio and self-locking characteristics of the worm gear and worm shaft transmission, the cross-sectional area of ​​the tube forming cavity can be precisely adjusted in a small amount, reducing the weight fluctuation problem that occurs during the production process. This helps to ensure the uniformity and consistency of the product wall thickness and ensure the forming quality of the product. Attached Figure Description

[0018] Figure 1 This is a front view of the high-speed rotary multi-die blow molding production line of the present invention; Figure 2 This is a top view of the high-speed rotary multi-mold blow molding production line of the present invention; Figure 3 This invention relates to a three-dimensional high-speed rotary multi-mold blow molding production line. Figure 1 ; Figure 4 This invention relates to a three-dimensional high-speed rotary multi-mold blow molding production line. Figure 2 ; Figure 5 This is a schematic diagram of the overall structure of the material tube forming die head of the present invention; Figure 6 This is a schematic diagram of the weight adjustment mechanism in the forming die head of the material tube of the present invention; Figure 7 This is a cross-sectional reference view of the fit between the mold core, the mold core outer sleeve, and the outer mold sleeve in the material tube forming die head of the present invention; Figure 8 This is a schematic diagram of the material tube cutting and sealing mechanism of the present invention; Figure 9 This is a front view of the multi-station forming mechanism of the present invention; Figure 10 This is a top view of the multi-station forming mechanism of the present invention; Figure 11This is a perspective view of the multi-station forming mechanism of the present invention; Figure 12 This is a structural diagram of the cam and roller cooperation in the multi-station forming mechanism of the present invention; Figure 13 This is a perspective view of the mold closing mechanism of the present invention; Figure 14 This is a top view of the mold clamping mechanism of the present invention; Figure 15 This is a structural diagram of the integrated water, gas, electricity and oil supply device of the present invention; Figure 16 This is an overall structural diagram of the robotic arm for retrieving parts according to the present invention; Figure 17 This is a side view of the main structural part of the part-retrieving robot of the present invention; Figure 18 This is a schematic diagram of the cooperation between the clearance groove A and the clearance groove B of the part-retrieving robot of the present invention; Figure 19 This is a schematic diagram of the structure of the filling sheet embedded in the relief groove A and relief groove B of the part-retrieving robot of the present invention; Figure 20 This is a perspective view of the combination of the molding part blanking edge removal mechanism and the vertical belt conveyor mechanism of the present invention; Figure 21 This is a left view of the cooperation between the molding part blanking edge removal mechanism and the vertical belt conveyor mechanism of the present invention; Figure 22 This is a simplified structural diagram of the molding part feeding plate removal mechanism of the present invention; In the diagram: 1. Heating and feeding mechanism; 2. Tube forming die head; 2.1. Die head drive cylinder; 2.2. Upper die head frame; 2.3. Intermediate connecting piece; 2.4. Middle die head frame; 2.5. Weight adjustment mechanism; 2.5.1. Adjusting handwheel; 2.5.2. Worm gear; 2.5.3. Drive shaft; 2.5.4. Worm wheel; 2.5.5. Nut; 2.6. Outer die sleeve bracket; 2.7. Lower die head frame; 2.8. Feeding interface; 2.9. Outer die sleeve; 2.10. Die core outer sleeve; 2.11. Isolation support column; 2.12. Die core; 2.13. Discharge cavity; 2.14. Tube forming cavity; 2.15. Discharge port; 3. Tube cutting and sealing mechanism; 3.1. Knife support; 3.2. Knife holder; 3.3. 3.4 Cutting blade; 3.5 Sealing plate; 3.6 Linear guide pair; 3.7 Cutting gear; 3.8 Rack; 3.9 Drive cylinder; 4. Multi-station forming mechanism; 4.1 Turntable base; 4.2 Turntable; 4.2.1 Turntable bottom plate; 4.2.2 Turntable top plate; 4.3 Integrated water, gas, electricity and oil supply device; 4.3.1 Water inlet connector; 4.3.2 Water return connector; 4.3.3 Water inlet and return connector; 4.3.4 Water return chamber; 4.3.5 Water inlet chamber; 4.3.6 Air tank; 4.3.7 Electrical rotary cable outlet section; 4.3.8 Electrical rotary cable inlet section; 4.3.9 Inner rotating section; 4.3.10 Outer fixed section; 4.3.11 Main oil inlet A; 4.3. 12. Oil Inlet B; 4.3.13. Oil Return Port B; 4.3.14. Main Oil Return Port A; 4.3.15. Initial Air Inlet; 4.4. Air Blowing Device; 4.4.1. Air Blowing Pipe Up-Down Movement Drive Component; 4.5. Mold Closing Device; 4.5.1. Mold Closing Device Base Plate; 4.5.2. Mold Closing Cylinder; 4.5.3. Oil Pipe Support; 4.5.4. Second End Plate; 4.5.5. Support Guide Rod; 4.5.6. Intermediate Plate; 4.5.7. Mold Closing Module; 4.5.8. First End Plate; 4.5.9. Connecting Frame; 4.5.10. Pull Rod Type Electronic Ruler; 4.5.11. Support Base; 4.5.12. Second Rack; 4.5.13. Mold Closing Gear; 4.5.14. Gear Seat; 4.5.15. 4.6 First rack; 4.7 Receiving station; 4.8 Qualified product unloading station; 4.9 Waste removal station; 4.10 Waste recycling and conveying mechanism; 4.11 Cam; 4.12 Roller; 5. Part picking robot; 5.1 Linear module; 5.2 Cantilever arm; 5.3 Receiving groove; 5.4 Filler plate; 5.5 Connecting frame assembly; 5.6 Molded plastic part receiving cavity; 5.7 Lower material edge receiving cavity; 5.8 Relief groove A; 5.9 Relief groove B; 6. Molded part lower material edge removal mechanism; 6.1 Base plate; 6.2 Front platform; 6.3 Rear platform; 6.4 Plastic part clamping assembly; 6.4.1 Clamping frame; 6.4.2 Clamping drive component; 6.5 Lower material edge removal assembly; 6.5.1. Trimming block; 7. Upper edge removal mechanism for molded parts; 7.1. Guide rail bracket; 7.2. Guide rail; 7.3. Plastic part clamping and positioning mechanism; 7.3.1. Slide carriage; 7.3.2. Clamping drive cylinder; 7.3.3. Support rod; 7.3.4. Positioning clamping block; 7.4. Single-sided trimming actuator; 7.4.1. Trimming drive cylinder; 7.4.2. Trimming pusher block; 8. Feeding platform; 9. Feeding frame; 10. Vertical belt conveyor mechanism; 10.1. Pusher baffle. Detailed Implementation

[0019] The structure of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0020] For an example of a high-speed rotary multi-die blow molding production line, please refer to [link / reference]. Figures 1-22 The invention features an automatic feeding mechanism, a heating and feeding mechanism 1, a tube forming die head 2, a tube cutting and sealing mechanism 3, a multi-station forming mechanism 4, a part picking robot 5, a lower part material edge removal mechanism 6, and an upper part material edge removal mechanism 7. It also includes a material edge and waste recycling mechanism.

[0021] The automatic feeding mechanism, used to adsorb plastic granules to the inlet of the heated feeding mechanism, mainly includes a material cylinder, a feeding conveying pipeline, and a feeding pump. The automatic feeding mechanism is not shown in the attached drawings.

[0022] The heating and feeding mechanism is used to heat the plastic granules to form molten raw material and convey it to the upper inlet of the forming die head of the feeding tube. In this invention, the heating and feeding mechanism adopts an auger-type conveying mechanism, with a total of three sets of conveying augers. The drive motor of each set of conveying augers is located at the rear end. A discharge funnel is vertically fixed at the upper part of the outer shell of each set of conveying augers near the rear end. The discharge funnel is used to temporarily store the granular raw material conveyed by the automatic feeding mechanism and to drop the granular raw material into the conveying auger through the lower port. A heating structure is wrapped around the outer shell of each set of conveying augers. The heating structure can be a resistance wire heating structure. A discharge port is provided at the front end of each set of conveying augers. The function of the heating structure is to gradually heat and melt the raw material as it is conveyed forward by the auger and output it through the discharge port at the front end of the conveying auger.

[0023] The heating and feeding mechanism is fixedly mounted on the feeding platform 8, which is positioned above the feeding frame 9. The rear end of the feeding platform is hinged to the feeding frame, and the lower front end of the feeding platform is connected to the feeding frame via a lifting mechanism. The lifting mechanism drives the feeding platform to reciprocate up and down around its hinge point with the feeding frame. The lifting mechanism can employ a combination of a drive cylinder and a ball joint support, with the upper cylinder rod end connected to the lower end of the feeding platform via the ball joint support. Alternatively, other mechanisms capable of reciprocating up and down motion can also be used.

[0024] The tube forming die head is fixedly mounted on the front end of the feeding platform via a die head bracket. The die head is equipped with a feed inlet 2.8, which connects to the outlet of the conveying auger of the heating and feeding mechanism. The lower end of the die head has multiple parallel outlets 2.15, each outlet outputting one extruded tube. During production, the lifting mechanism drives the feeding platform to reciprocate up and down around the hinge point with the feeding frame, thereby driving the tube forming die head to move up and down reciprocally.

[0025] The forming die head for the tube includes a die head frame, an outer die sleeve 2.9, an outer die sleeve support 2.6, a die core 2.12, a die core outer sleeve 2.10, and a weight adjustment mechanism 2.5. One outer die sleeve and one die core work together to form a forming module. The weight adjustment mechanism is used to achieve precise adjustment of the wall thickness of the formed tube.

[0026] The die head frame includes an upper die head frame 2.2, a middle die head frame 2.4, and a lower die head frame 2.7, which are arranged vertically. The upper die head frame is fixedly connected to the front end of the die head support. The upper and lower die head frames are fixedly connected by multiple isolation support columns 2.11, and the middle die head frame is slidably connected to the multiple isolation support columns via linear bearings. A die head drive cylinder 2.1 is vertically mounted on the upper die head frame, and the lower cylinder rod end of the die head drive cylinder is fixedly connected to the upper end of the middle die head frame via an intermediate connector 2.3.

[0027] The middle die head frame adopts a box-type die head frame. The lower die head frame is provided with a material input channel, which is connected to the feeding interface 2.8 located on the side of the lower die head frame.

[0028] The mold core sleeve is fixed to the lower end of the lower mold head frame, and the upper part of the mold core is inserted into the inner hole of the mold core sleeve, forming a feeding cavity 2.13 that communicates with the liquid input channel on the lower mold head frame.

[0029] The outer mold sleeve bracket is mounted and fitted onto the lower mold head frame in a vertically movable manner. A nut 2.5.5 is fixed to the top of the outer mold sleeve bracket, and its bottom is fixedly connected to the upper end of the outer mold sleeve. The nut 2.5.3 is threadedly connected to the lower end of a drive shaft 2.5.3. The outer mold sleeve bracket consists of a bracket top plate, a bracket pad, and four guide rods connecting the bracket top plate and the bracket bottom plate.

[0030] The upper end of the outer mold sleeve is fixedly connected to the lower end of the outer mold sleeve bracket, and is fitted with the lower part of the mold core with a gap, forming a material tube forming cavity 2.14 between the two. The material tube forming cavity is an annular cavity with a gradually decreasing gap from top to bottom. The material tube forming cavity and the material discharge cavity formed between the mold core outer sleeve and the mold core are sealed and connected vertically.

[0031] The weight adjustment mechanism employs a worm gear transmission mechanism. The worm gear 2.5.4 is housed within the inner cavity of the middle die head frame, and is coaxially and fixedly connected to the upper end of the transmission shaft 2.5.3. The two ends of the worm 2.5.2 are rotatably supported and meshed with the front and rear side walls of the middle die head frame. The front end of the worm extends from the front side of the middle die head frame and is equipped with an adjusting handwheel 2.5.1. This weight adjustment mechanism allows for precise micro-adjustment of the output weight. The adjusting handwheel, located on the side of the forming die head, offers convenient adjustment.

[0032] This tube forming die head inputs molten plastic raw material through the feed port 2.8. The input plastic raw material passes through the molten material input channel, the discharge chamber 2.13, and the tube forming chamber 2.14 from top to bottom, forming a thin-walled tube within the tube forming chamber, and then outputting through the lower port of the tube forming chamber. The outer mold sleeve 2.9 and outer mold sleeve support 2.6 in this tube forming die head are movable parts for precise weight adjustment. The weight adjustment mechanism is a drive mechanism that drives the outer mold sleeve 2.9 and outer mold sleeve support 2.6 to make slight up-and-down movements. When precise adjustment of the output weight is required, turn the adjustment handwheel 2.5.1 to drive the worm gear 2.5.2 to rotate. The worm gear 2.5.2 and worm wheel 2.5.4 mesh to drive the transmission shaft to rotate. Since the transmission shaft 2.5.3 is threadedly engaged with the nut 2.5.5 fixed on the upper part of the outer mold sleeve support, the nut can drive the outer mold sleeve support and the outer mold sleeve to move up and down slightly. The up and down movement of the outer mold sleeve can change the lower port area of ​​the material tube forming cavity formed by it and the mold core, thereby realizing the adjustment of the material tube wall thickness and ultimately achieving precise control of the output weight.

[0033] The die head drive cylinder can drive the middle die head frame, weight adjustment mechanism, outer die sleeve support and outer die sleeve to move up and down periodically, thereby realizing the adjustment of the die head up and down movement within one product cycle to change the wall thickness of the blank and meet the material thickness requirements of different parts of the product.

[0034] In addition, a heating and insulation layer is provided on the outside of the mold core sleeve and the outside of the outer mold sleeve to prevent the molten material from solidifying in the feeding cavity and affecting the smooth forming of the material tube. In addition, an air blowing passage is provided in the middle of the mold core, which is connected to the lower end of the mold core and connected to the air inlet passage provided in the mold core sleeve. By blowing air into the downward-hanging forming material tube, the material tube is prevented from sticking together.

[0035] In this invention, the number of molding modules is determined by the number of molding cavities on each molding and closing device of the multi-station molding mechanism.

[0036] The tube cutting and sealing mechanism is located below the tube forming die head and is mounted on the front extension frame of the feeder frame. It is used to cut the tube at the upper end of the forming and closing cavity of the multi-station forming mechanism after the tube enters the cavity, and to seal the upper part of the cut. This sealed portion corresponds to the bottom of the next blow-molded part. The tube cutting and sealing mechanism is implemented using a cutting mechanism and a sealing mechanism synchronized with the docking mechanism. Specifically, it includes a blade support 3.1, two blade holders 3.2, two pairs of cutting blades 3.3, two sealing pressure plates 3.4, and a cutting drive mechanism. The blade support is fixed to the front extension frame of the feeder frame. A material passage hole is provided on the blade support directly below the outlet of the tube forming die head, and the area of ​​the material passage hole needs to cover the area of ​​all outlets at the lower end of the tube forming die head. Two cutter holders are slidably mounted relative to each other on the upper end of the cutter support, corresponding to the material passage hole, via linear guide pairs 3.5. Two pairs of cutting blades are mounted opposite each other on the lower inner side of the two cutter holders, and two sealing pressure plates are mounted opposite each other on the upper inner side of the two cutter holders. The cutting drive mechanism is used to drive the two cutter holders to move towards each other, realizing the cutting of the material tube and the sealing of the upper part of the cut. The cutting drive mechanism can be two sets of drive cylinders that drive the two cutter holders respectively; or it can be a cutting gear 3.6 and double rack 3.7 meshing structure, with the cutting gear meshing with the two racks on both sides, the two racks being fixedly connected to the two cutter holders respectively, and one of the cutter holders being connected to the cylinder rod end of a drive cylinder 3.8, see [link to relevant documentation]. Figure 8 Alternatively, a connection structure of bidirectional screw and nut can be adopted. The bidirectional screw is driven by a servo motor, and the two reverse threaded sections at both ends of the bidirectional screw are respectively connected to a nut. The nuts at both ends are fixed on two tool holders.

[0037] The multi-station molding mechanism includes a turntable base 4.1, a turntable 4.2, a multi-combination mold device 4.5, a multi-group air blowing device 4.4, a turntable drive mechanism, a radial movement drive mechanism for the mold closing device, and an integrated water, air, electricity, and oil supply device 4.3.

[0038] The base supports the turntable. The turntable consists of a base plate 4.2.1, a top plate 4.2.2, and multiple support columns connecting the base plate and the top plate. The turntable is coaxially supported on the top of the base by end-face bearings. Multiple mold assembly devices are evenly distributed along the circumferential direction on the upper part of the base plate. The base plate of each mold assembly is slidably connected to the upper end of the base plate via linear guide rails along the radial direction of the turntable. A material discharge through hole is provided on the base plate corresponding to the lower position of each mold assembly.

[0039] A set of air blowing devices is installed above each mold assembly at the lower end of the turntable top plate. The turntable drive mechanism is used to drive the turntable to rotate multiple mold assemblies in the circumferential direction. The turntable drive mechanism includes a turntable servo motor, gears, and a gear ring, which are not shown in the attached drawings. The turntable servo motor is fixedly installed on the lower part of the base, and the upper output end of the turntable servo motor is fixedly connected to the gear. The gear meshes with the gear ring, and the gear ring is coaxially fixed to the lower end of the turntable base plate. The radial movement drive mechanism of the mold closing device is used to enable the mold closing device to move radially to the outer working position when it rotates to the position below the material tube forming die head. The outer working position is the material receiving position 4.6. The material tube is received through the open mold closing cavity, while avoiding interference with the air blowing devices fixed at the lower end of the turntable top plate. At the same time, when the mold closing device moves to other positions, the air inlet at the upper end of the material tube in the mold closing cavity is aligned vertically with the lower end of the corresponding air blowing device. In this system, each mold assembly, when rotated to the position aligned with the forming die head of the material tube, serves as the receiving station for that assembly. As the turntable rotates, the mold closing device, having completed feeding, intermittently rotates to different stations to complete air blowing molding and cooling. The station preceding the receiving station along the rotation direction is the qualified product unloading station 4.7, where the molded plastic part is unloaded through mold opening. The station preceding the unloading station is the waste removal station 4.8, where pressure feedback from the air supply pipeline of the corresponding air blowing device is used to determine if there is an air leak in the molded plastic part. If the air pressure feedback value is less than the set value, the plastic part is identified as waste. At this time, the corresponding mold closing device opens the mold, the waste is demolded, and falls through the unloading hole on the turntable base plate to the waste recycling conveyor 4.9 located below. The waste recycling conveyor is a belt conveyor.

[0040] In this invention, the radial movement drive mechanism of the mold closing device adopts a mating structure of cam 4.10 and roller 4.11. The cam is a fixed component, which is fixedly installed at the upper center of the base plate and embedded in the pre-reserved center hole in the turntable base plate. The cam is a geometric closed cam with a closed curved groove on its upper end face. A roller is rotatably installed on the inner end of the base plate of each mold assembly via a roller shaft, and the roller is rotatably embedded in the closed curved groove on the cam. The closed curved groove on the cam consists of a large-diameter arc groove concentric with the center of the turntable, a small-diameter arc groove eccentric with the center of the turntable, and two transition grooves connecting the small-diameter arc groove and the large-diameter arc groove. The midpoint of the small-diameter arc groove constitutes the high point of the cam, and the line connecting this high point with the center of the turntable is consistent with the line connecting the center of the tube forming die head with the center of the turntable, ensuring that the mold closing device rotated to this position moves to a position directly below the tube forming die head.

[0041] Each mold assembly also includes two opposing mold-closing modules 4.5.7, a mold-closing module guide support mechanism, and a mold-opening and closing drive motor for realizing the relative movement of the two mold-closing modules.

[0042] The mold-closing module guide support mechanism includes a first end plate 4.5.8, a second end plate 4.5.4, a middle plate 4.5.6, and four support guide rods 4.5.5. The first end plate, second end plate, and middle plate are all vertical plates. From one end to the other, the first end plate, middle plate, and second end plate are arranged parallel and perpendicularly on the mold-closing device base plate 4.5.1. Shaft through holes are provided at the upper and lower positions near the left and right ends of the first end plate, the middle plate, and the second end plate. The four shaft through holes on the first end plate, the middle plate, and the second end plate are all aligned. The four support guide rods are distributed and inserted into the four corresponding shaft through holes. The four support guide rods are fixedly connected to the first end plate and the second end plate, and slidably connected to the middle plate via linear bearings. Rod support seats 4.5.11 are fixedly installed at the upper part of the base plate near the left and right sides, one at the front and one at the back. The support guide rods located at the lower part of the left and right sides are axially movable and mounted on the two rod support seats on the corresponding sides.

[0043] Two mold-fitting modules are mounted opposite each other on the sides of the intermediate plate and the first end plate, with mold-fitting half-cavities provided on the opposite sides of the modules. When the two modules come into contact, a complete molding cavity is formed inside them.

[0044] The mold opening and closing drive includes a mold opening and closing drive component. This drive component is a linear motion output type, such as a hydraulic cylinder or electric push rod; in this invention, a mold closing hydraulic cylinder 4.5.1 is preferred. An oil pipe bracket 4.5.3 is fixed to the upper end of the second end plate for easy fixing of the oil pipe. The mold opening and closing drive component is fixedly mounted on the second end plate. The power output end of the drive component is connected to the side of the intermediate plate opposite to the mold closing module, driving the intermediate plate and the first end plate to move relative to each other, thus closing the mold, or to move towards each other, thus opening the mold.

[0045] To ensure the mold closing device closes the mold at the set position and to guarantee the accuracy and consistency of the mold closing position, the mold opening and closing drive motor also includes a synchronization mechanism. The synchronization mechanism employs a transmission mechanism where two racks mesh on both sides of the mold closing gear, including a mold closing gear 4.5.13, a first rack 4.5.15, and a second rack 4.5.12. The synchronization mechanism is integrally mounted above the base plate of the mold closing device. The mold closing gear is rotatably mounted on a gear shaft via bearings. The gear shaft is fixed to a gear seat 4.5.14, which is fixedly mounted on the upper part of the base plate, positioned between the intermediate plate and the second end plate. Rack insertion holes are provided on both sides of the gear seat where the gear shaft is mounted. One end of the first rack is fixedly connected to the side of the intermediate plate away from the mold block. The other end of the first rack passes through the rack insertion hole on one side and meshes with one side of the mold closing gear. One end of the second rack is fixedly connected to the second end plate. The other end of the second rack passes through the rack insertion hole on the other side and meshes with the other side of the mold closing gear. The movement direction of the two gear racks is parallel to the axis of the four support guide rods. This synchronization mechanism ensures the consistency of the displacement of the two mold blocks during mold closing and opening, thereby achieving the accuracy and consistency of the mold closing position. This ensures accurate alignment with the upper unloading die head and the air blowing device when this mold closing device is applied to blow molding production equipment.

[0046] To achieve accurate detection of mold opening and closing movement, thereby facilitating control of the mold closing drive component's travel stroke via the blow molding production equipment's control system, a pull rod type electronic ruler 4.5.10 is installed on the bottom plate via a ruler bracket. The pull rod type electronic ruler is set in a direction parallel to the support guide shaft. A connecting frame 4.5.9 is fixedly installed on the side of the intermediate plate. The pull rod end of the pull rod type electronic ruler is fixedly connected to the connecting frame. The pull rod type electronic ruler enables synchronous real-time detection of mold closing displacement and mold opening displacement.

[0047] The aforementioned assembly module has built-in cooling water channels, which allow for rapid cooling after blow molding by introducing cooling water.

[0048] The air blowing device can refer to the existing blow molding structure, mainly including air blowing pipes, guide plates, connecting plates, guide supports, and air blowing pipe vertical displacement drive components. The guide support consists of a top plate, a bottom frame, and edge guide rods connecting the top plate and the bottom frame. The top plate of the guide support is vertically fixed to the lower end of the turntable top plate. The upper end of the air blowing pipe is provided with an air inlet, through which gas is introduced, and the lower end is connected to an air blowing nozzle for gas output. The number of air blowing pipes matches the number of molding cavities on each mold assembly below. The upper ends of multiple air blowing pipes are vertically fixed to the guide plate, and the two ends of the guide plate form a vertical guiding fit with the edge guide rods of the guide support through guide holes. The air blowing nozzles at the lower ends of multiple air blowing pipes are fixedly mounted on the connecting plate. The air blowing pipe vertical displacement drive component 4.4.1 adopts a cylinder, which can be fixed to the lower top of the guide support and connected to the upper end of the guide plate through a push rod. When the mold clamping device rotates to the blanking station of the blow molded part, the air blowing pipe moves to the upper working position under the action of the air blowing pipe vertical displacement drive, thereby avoiding collision damage to the air blowing nozzle caused by the radial movement of the mold clamping device during the rotation from the blanking station to the loading station. In positions other than the two mentioned above, the air blowing pipe moves to the lower end position to provide air to the corresponding mold cavity.

[0049] The integrated water, gas, electricity, and oil supply device is used to supply water, electricity, oil, and gas to the rotating part of the multi-station forming mechanism. It is installed in a columnar manner at the center of the turntable. The specific structure includes: a water supply unit, an air supply unit, an electricity supply unit, and an oil supply unit.

[0050] The water supply unit includes an inlet connector 4.3.1, a return connector 4.3.2, and an inlet / return water integrator 4.3.3. The inlet / return water integrator internally comprises a return water chamber 4.3.4 and an inlet water chamber 4.3.5, which are sealed and spaced apart. Multiple return water inlets are evenly distributed circumferentially on the outer wall of the return water chamber, and these inlets are connected to the return water inlets on the assembly modules of the multi-module assembly via pipelines. Multiple outlets are evenly distributed circumferentially on the outer wall of the inlet water chamber, and these outlets are connected to the inlet outlets on the assembly modules of the multi-module assembly via pipelines. The aforementioned return and inlet connectors are fitted together with a central gap to form an inlet / return water connector assembly. The central part is the inlet passage, and the outer periphery is the return water annular cavity. The inlet passage and the return water annular cavity are separated. An inlet communicating with the inlet passage is provided on the side wall of the inlet connector, and a return outlet communicating with the return water annular cavity is provided on the side wall of the return connector. The inlet and outlet water connector assembly is a fixed component, and the inlet and outlet water integrator is a rotating component. It is connected to the bottom of the inlet and outlet water connector assembly in a relatively rotatable manner, and the outlet water ring cavity is sealed and connected to the outlet water cavity, and the inlet water passage is connected to the inlet water cavity.

[0051] The air supply unit includes an air storage tank 4.3.6, which is a cylindrical tank. The air storage tank is fixedly installed at the lower end of the inlet and outlet water integrator. An air storage chamber is provided inside the air storage tank. Multiple air outlets are evenly distributed along the circumference of the outer wall of the air storage tank. These outlets are connected to the air inlets of multiple sets of air blowing devices via their respective connecting pipes. An air inlet is located at the center of the bottom of the air storage tank.

[0052] The power supply unit is located below the gas storage tank and includes an electrical rotary outgoing part 4.3.7 and an electrical rotary incoming part 4.3.8, which are arranged internally and externally. The electrical rotary outgoing part is a rotating part and the electrical rotary incoming part is a fixed part.

[0053] The oil supply unit includes an outer fixed portion 4.3.10, an inner rotating portion 4.3.9, a main oil inlet A 4.3.11, a main oil return port A 4.3.14, an oil inlet B 4.3.12, and an oil return port B 4.3.13. The upper end of the outer fixed portion is coaxially and fixedly connected to the lower end of the electric rotary inlet portion. The outer fixed portion is connected to the main oil inlet A and the main oil return port A. The inner rotating portion is connected to the oil inlet B and the oil return port B. The upper end of the inner rotating portion of the oil supply unit is fixedly connected to the lower center of the gas storage tank and is fixedly inserted into the electric rotary outlet portion. The main oil inlet A is connected to the oil inlet B through the inner rotating part, and the main oil return port A is connected to the oil return port B through the inner rotating part. The oil inlet B is connected to the oil inlet of the mold closing cylinder of the multi-combination mold device via an oil inlet pipe, and the oil return port B is connected to the oil return port of the mold closing cylinder of the multi-combination mold device via a return pipe. An air inlet is located at the center of the inner rotating part. The upper end of the air inlet is sealed to the air inlet at the lower end of the air tank, and the lower end of the air inlet is the initial air inlet 4.3.15, through which gas is input.

[0054] The robotic arm is used to receive the molded plastic part from below when the corresponding mold closing device rotates to the qualified product unloading station.

[0055] The robotic arm for picking up parts includes a linear module 5.1, a cantilever arm 5.2, and a receiving groove 5.3. The linear module is vertically arranged, and its slider is located on the back of the guide rail. A vertical connecting frame is fixedly installed on the front of the guide rail of the linear module. The vertical connecting frame is fixedly connected to the front end of a horizontal connecting frame by screws, and the rear end of the horizontal connecting frame is fixedly connected to the turntable base to achieve fixed support for the linear module. The vertical connecting frame and the horizontal connecting frame form a connecting frame assembly 5.5. The cantilever arm is L-shaped, with its front end of the horizontal arm fixedly connected to the slider of the linear module, and its lower end of the vertical arm fixedly connected to the upper rear end of the horizontal arm. The vertical arm consists of a top plate, a top plate, and four support rods connecting the bottom plate and the top plate. When the mold closing device adopts a multi-cavity mold structure, a clearance groove A5.8 is provided on the top plate corresponding to the position between adjacent mold cavities. The receiving groove consists of a bottom, a front baffle, and a rear baffle, forming an upper cavity and a lower cavity. The upper cavity is a cavity 5.6 for receiving the molded plastic part, and the lower cavity is a cavity 5.7 for receiving the lower edge of the molded plastic part. The width of the upper cavity matches the lower width of the molded plastic part, while the width of the lower cavity is greater than the width of the lower edge of the molded plastic part, and the depth of the lower cavity is greater than the height of the lower edge of the molded plastic part. A connecting clearance groove B5.9 is provided on the rear baffle and the bottom of the groove, corresponding to the clearance groove on the top plate.

[0056] During the blow molding process, the material receiving groove of the molded plastic part removal mechanism moves to the upper working position under the action of the linear module. As the two side modules of the mold closing mechanism open, the molded plastic part falls into the inner cavity of the material receiving groove. Then, the linear module drives the material receiving groove and the molded plastic part (one or more pieces) in the material receiving groove to the lower working position through the cantilever arm, so as to realize the removal of the molded part.

[0057] The lower material edge removal mechanism is located on one side of the receiving slot of the part-picking robot at the lower workstation. The lower material edge removal mechanism consists of a base plate 6.1, a front platform 6.2 and a rear platform 6.3 mounted at equal height above the base plate, two sets of plastic part clamping assemblies 6.4 mounted opposite each other on the front and rear platforms, and two sets of lower material edge removal assemblies 6.5 mounted opposite each other on the base plate below the front and rear platforms. A material passage gap is provided between the front and rear platforms to allow the lower material edge of the molded plastic part to pass through. Each of the two sets of plastic part clamping assemblies consists of a clamping frame 6.4.1 located on the inner side and a clamping drive component 6.4.2 connected to the outer side of the clamping frame. The clamping frame is used to clamp the upper and lower parts of the molded plastic part and can be in the form of clamping notches. The number of clamping notches is consistent with the number of mold cavities in the mold closing device. The clamping drive component can be a clamping drive cylinder. When the clamping frames on both sides move towards each other under the action of their respective clamping drive components, they can clamp and fix the molded plastic parts.

[0058] The two sets of lower edge removal components consist of an edge removal block 6.5.1 located on the inner side and an edge removal drive component connected to the outer side of the edge removal block. The inner ends of the edge removal blocks on both sides can adopt a concave-convex interlocking surface with opposite arrangement to achieve clamping and fixing of the lower cut edge. The clamping drive component can be an edge clamping drive cylinder. After the two sets of plastic part clamping components clamp and fix the molded plastic part, the edge removal blocks on both sides move towards each other under the action of their respective edge removal drives. First, they clamp and fix the lower edge of the plastic part. Then, the blanking plate of the molded plastic part, which is clamped by the edge removal blocks on both sides, is shifted to one side to separate the lower edge from the body of the molded plastic part, thus completing the removal of the blanking plate.

[0059] In the above structure, a material discharge through hole is provided on the base plate at the middle position corresponding to the two sets of lower material edge removal components, and a front-end waste output mechanism is provided below the material discharge through hole. The front-end waste output mechanism adopts a belt conveyor.

[0060] The lower material edge removal mechanism and the part-picking robot are connected by a rear-mounted vertical belt conveyor 10 to transport the molded plastic parts. Multiple sets of outward-extending pusher baffles 10.1 are fixed on the conveyor belt of the vertical belt conveyor. Each set of pusher baffles consists of a front baffle and a rear baffle. The front baffle is used to limit the forward movement of the molded plastic part, and the rear baffle is used to push the molded plastic part forward to the lower material edge removal mechanism. The rear end of the conveyor belt of the vertical belt conveyor extends to the position behind the receiving trough at the lower working position, and the rear end of the conveyor belt extends to the position in front of the two clamping frames.

[0061] A filler piece 5.4 is fixedly installed at the front of the conveyor belt mounting frame of the vertical conveyor mechanism. When the receiving trough moves to the lower working position, the filler piece is embedded in the relief groove B, ensuring that the molded plastic part is smoothly conveyed from the relief groove to the material edge removal station of the material edge removal mechanism.

[0062] The upper edge removal mechanism for the molded part is used to remove the upper edge of the molded plastic part. It mainly includes: a frame, a guide rail support 7.1, a plastic part clamping and positioning mechanism 7.3, and a single-sided edge removal execution mechanism 7.4. The plastic part clamping and positioning mechanism is a double-sided clamping and positioning mechanism, consisting of clamping components arranged opposite to each other on both sides. The guide rail support is fixedly installed on the upper surface of the frame. Two guide rails 7.2 extending left and right are arranged front and rear on the guide rail support. The clamping components on both sides are connected to the two ends of the guide rails via their respective slides 7.3.1. Clamping drive cylinders 7.3.2 are connected to the outer sides of both slides. Positioning clamping blocks 7.3.4 are connected to the inner sides of the two slides via multiple support rods 7.3.3. The shape of the inner positioning surface of the positioning clamping blocks on both sides matches the shape of the corresponding side of the molded plastic part. Through the cooperation of the positioning clamping blocks on both sides, the molded plastic part is clamped and positioned. In this invention, for a multi-cavity mold closing device, the left-side positioning clamping block on one side adopts an integral structure, while the right-side positioning clamping block adopts a multi-body structure arranged in parallel front and rear. The single-sided edge-removing actuator is located inside the slide on one side and includes an edge-removing drive cylinder 7.4.1, an edge-removing push block 7.4.2, and a push block support. The edge-removing drive cylinder is vertically and fixedly connected to the inner side of the corresponding side slide; the outer middle part of the push block support is fixedly connected to the cylinder rod end of the edge-removing drive cylinder. The inner side of the push block support is vertically and fixedly connected to the outer end of the edge-removing push block, and the inner end of the edge-removing push block is the edge-removing action end. The shape of the inner end of the edge-removing push block matches the shape of the material edge on the upper part of the molded plastic part. This ensures the stability of the single-sided edge-removing actuator's movement. Two guide rods are vertically fixed inside the slide on the side where the single-sided edge removal actuator is set. The two guide rods are respectively set on both sides of the edge removal drive cylinder. Two guide holes are set on the pusher block bracket, and guide sleeves are fixedly installed in the two guide holes. The pusher block bracket forms a support and guide cooperation with the two guide rods through the two guide sleeves.

[0063] A plastic part conveying mechanism is provided between the tail end of the lower edge removal mechanism and the upper edge removal mechanism of the molded part. The plastic part conveying mechanism is a belt conveyor used to transport the molded plastic part with the lower edge removed to the upper edge removal mechanism. The conveyor belt of the plastic part conveying mechanism passes through the space between the clamping components on both sides of the plastic part clamping and positioning mechanism and extends to the rear end of the upper edge removal mechanism of the molded part, realizing the output of the finished plastic part.

[0064] To facilitate the recycling of the upper edge of the plastic part after removal, a material discharge hole is provided on the upper platform of the frame, located below the center of the plastic part clamping and positioning mechanism. A rear-end waste output mechanism, which is a belt conveyor, is located below the upper platform corresponding to the material discharge hole. The rear-end waste output mechanism, the front-end waste output mechanism, and the waste recycling conveying mechanism converge at their ends into a recycling bin, forming the material edge and waste recycling mechanism.

[0065] The working principle of this invention is as follows: The automatic feeder sucks plastic granules into the hopper, which is connected to the screw. The heated screw drives the plastic granules to become molten material, which is then fed into the die head. The molten material is extruded through a hollow tube as the die head moves. The hollow material tube falls into the mold cavity of the mold closing device located at the feeding position on the turntable. After mold closing, compressed air is injected into the middle of the hollow material tube by the air blowing device, so that the hollow material tube gradually cools and forms the required product shape as it fits the mold. When the mold closing device rotates to the qualified product unloading station, the part picking robot moves to the upper working position. At the same time, the mold closing device opens the mold, and the molded plastic part falls into the receiving groove of the part picking robot. After the part picking robot moves to the lower working position, the molded plastic part is pushed to the lower material edge removal mechanism by the vertical belt conveyor mechanism. After clamping and fixing, the lower material edge is removed and pushed to the plastic part conveying mechanism. The plastic part is conveyed to the upper material edge removal mechanism by the plastic part conveying mechanism. After clamping and fixing, the upper plate is removed. Finally, the qualified finished plastic part is output by the plastic part conveying mechanism.

[0066] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A high-speed rotary multi-mold blow molding production line, characterized in that: It includes an automatic feeding mechanism, a heating feeding mechanism (1), a tube forming die head (2), a tube cutting and sealing mechanism (3), a multi-station forming mechanism (4), a part picking robot (5), a material removal mechanism for the lower part of the formed part (6), and a material removal mechanism for the upper part of the formed part (7), which are connected in sequence according to the production process. The multi-station molding mechanism (4) includes a turntable base (4.1), a turntable (4.2), a multi-combination mold device (4.5), a multi-group air blowing device (4.4), a turntable drive mechanism, a radial movement drive mechanism for the mold closing device, and an integrated water, air, electricity, and oil supply device (4.3). The turntable (4.2) is coaxially supported on the top of the turntable base (4.1); multiple combination mold devices (4.5) are evenly distributed along the circumferential direction on the upper end of the turntable base plate (4.2.1), and the multiple combination mold devices (4.5) can slide along the radial direction of the turntable; A set of air blowing devices (4.4) is installed at the lower end of the turntable top plate (4.2.2) above each combined mold device (4.5); the turntable drive mechanism is used to drive the turntable (4.2) to rotate the multiple combined mold devices (4.5) in the circumferential direction; the mold closing device radial movement drive mechanism is used to enable the mold closing device (4.5) to move radially to the outer working position when it rotates to the position below the material tube forming die head (2). The material tube is received by opening the mold cavity. When the mold closing device (4.5) moves to other stations, the air inlet (4.3.15) at the upper end of the material tube in the mold cavity is aligned with the vertical opening at the lower end of the corresponding air blowing device (4.4). The station aligned with the material tube forming die head (2) is the receiving station (4.6), and the station adjacent to the receiving station (4.6) along the rotation direction is the qualified product unloading station (4.7). The integrated water, gas, electricity and oil supply device (4.3) is installed in a columnar manner at the center of the turntable (4.2) and is used to supply water, electricity, oil and gas to the rotating part of the multi-station forming mechanism (4).

2. The high-speed rotary multi-mold blow molding production line according to claim 1, characterized in that: The heating and feeding mechanism (1) is used to heat the plastic granules input by the automatic feeding mechanism to form a molten raw material and transport it to the upper feed port (2.8) of the material tube forming die head (2); The heating and feeding mechanism (1) adopts an auger conveying mechanism with three sets of conveying augers. The drive motor of each set of conveying augers is located at the rear end. A feeding funnel is vertically fixed at the upper part of the outer shell of each set of conveying augers near the rear end. The feeding funnel is used to temporarily store the granular raw materials conveyed by the automatic feeding mechanism and drop the granular raw materials into the conveying auger through the lower port. A heating structure is wrapped around the outer shell of each set of conveying augers. The heating and feeding mechanism (1) is fixedly installed on the feeding platform (8). The feeding platform (8) is located above the feeding frame (9). The rear end of the feeding platform (8) is hinged to the feeding frame (9). The lower front end of the feeding platform (8) is connected to the feeding frame (9) through a lifting mechanism. The lifting mechanism is used to drive the feeding platform (8) to swing up and down around the hinge point between it and the feeding frame (9).

3. The high-speed rotary multi-mold blow molding production line according to claim 1, characterized in that: The forming die head (2) is fixedly installed on the front end of the feeding platform (8) by the die head bracket. Multiple parallel discharge ports (2.15) are provided at its lower end. Each discharge port (2.15) outputs a material tube formed by extrusion. The forming die head (2) for forming tubes includes a die head frame, an outer die sleeve (2.9), an outer die sleeve support (2.6), a die core (2.12), a die core outer sleeve (2.10), and a weight adjustment mechanism (2.5). An outer die sleeve (2.9) and a die core (2.12) work together to form a forming module. The weight adjustment mechanism (2.5) is used to achieve precise adjustment of the wall thickness of the formed tube. The die head frame includes an upper die head frame (2.2), a middle die head frame (2.4), and a lower die head frame (2.7); the upper die head frame (2.2), the middle die head frame (2.4), and the lower die head frame (2.7) are arranged vertically; the upper die head frame (2.2) is fixedly connected to the front end of the die head support; the upper die head frame (2.2) and the lower die head frame (2.7) are fixedly connected by multiple isolation support columns (2.11), and the middle die head frame (2.4) is slidably connected to the multiple isolation support columns (2.11) by linear bearings; a die head drive cylinder (2.1) is vertically installed on the upper die head frame (2.2), and the lower cylinder rod end of the die head drive cylinder (2.1) is fixedly connected to the upper end of the middle die head frame (2.4) through an intermediate connector (2.3); The middle die head frame (2.4) adopts a box-type die head frame; the lower die head frame (2.7) is provided with a liquid input channel inside, and the liquid input channel is connected to the feed interface (2.8) provided on the side of the lower die head frame (2.7); The mold core sleeve (2.10) is fixed to the lower end of the lower mold head frame (2.7). The upper part of the mold core (2.12) is inserted into the inner hole of the mold core sleeve (2.10), and the two form a feeding cavity (2.13) that communicates with the liquid input channel on the lower mold head frame (2.7). The outer mold sleeve bracket (2.6) is mounted and fitted with the lower mold head frame (2.7) in a vertically movable manner. A nut (2.5.5) is fixed on the top of the outer mold sleeve bracket (2.6), and its bottom is fixedly connected to the upper end of the outer mold sleeve (2.9). The nut (2.5.5) is connected to the lower end of a drive shaft (2.5.3) by a thread. The upper end of the outer mold sleeve (2.9) is fixedly connected to the lower end of the outer mold sleeve bracket (2.6) and is fitted with the lower part of the mold core (2.12) with a gap, forming a tube forming cavity (2.14) between the two. The tube forming cavity (2.14) is an annular cavity with a gradually decreasing gap from top to bottom. The tube forming cavity (2.14) and the unloading cavity (2.13) are sealed and connected from top to bottom. The weight adjustment mechanism (2.5) adopts a worm gear transmission mechanism. The worm gear (2.5.4) is set in the inner cavity of the middle die head frame (2.4). The worm gear (2.5.4) is coaxially fixedly connected to the upper end of the transmission shaft (2.5.3). The two shaft ends of the worm (2.5.2) are rotatably supported by the front and rear side walls of the middle die head frame (2.4) and mesh with the worm gear (2.5.4). The front part of the front shaft end of the worm (2.5.2) extends out from the front side of the middle die head frame (2.4) and is equipped with an adjustment handwheel (2.5.1).

4. The high-speed rotary multi-mold blow molding production line according to claim 1, characterized in that: The tube cutting and sealing mechanism (3) is located below the tube forming die head (2); the tube cutting and sealing mechanism (3) includes a knife support (3.1), two knife holders (3.2), two pairs of cutting blades (3.3), two sealing pressure plates (3.4), and a cutting drive mechanism; the knife support (3.1) is fixed on the front extension frame of the feeder frame (9), and a material passage hole is provided on the knife support (3.1) at the position directly below the material outlet (2.15) of the tube forming die head (2); the two knife holders (3.2) are slidably mounted on the upper end of the knife support (3.1) at the position corresponding to the material passage hole through the linear guide pair (3.5). Two pairs of cutting blades (3.3) are installed opposite each other on the lower inner side of the two blade holders (3.2), and two sealing pressure plates (3.4) are installed opposite each other on the upper inner side of the two blade holders (3.2). The cutting drive mechanism is used to drive the two blade holders (3.2) to move towards each other, so as to realize the cutting of the material tube and the sealing of the upper part of the cut. The cutting drive mechanism adopts a meshing structure of cutting gear (3.6) and double rack. The cutting gear (3.6) meshes with the two racks (3.7) set on both sides. The two racks (3.7) are fixedly connected to the two blade holders (3.2) respectively, and one of the blade holders is connected to the cylinder rod end of a drive cylinder (3.8).

5. The high-speed rotary multi-mold blow molding production line according to claim 1, characterized in that: The turntable drive mechanism includes a turntable servo motor, a gear, and a gear ring. The turntable servo motor is fixedly installed on the lower part of the base. The upper output end of the turntable servo motor is fixedly connected to the gear. The gear meshes with the gear ring. The gear ring is coaxially fixed to the lower end of the turntable base plate (4.2.1). The radial movement drive mechanism of the mold closing device adopts a cam (4.10) and roller (4.11) cooperation structure. The cam (4.10) is fixedly installed at the top center position of the turntable base and embedded in the reserved center hole on the turntable base plate (4.2.1). The cam (4.10) adopts a geometric closed cam with a closed curved groove on the upper end face. A roller (4.11) is rotatably installed on the inner end of the base plate of each mold assembly device (4.5) through a roller shaft. The roller (4.11) is rotatably embedded in the closed curved groove on the cam (4.10).

6. The high-speed rotary multi-die blow molding production line according to claim 1, characterized in that: Each mold assembly (4.5) includes two opposing mold-closing modules (4.5.7), a mold-closing module guide support mechanism, and a mold-opening and closing drive motor for realizing the relative movement of the two mold-closing modules (4.5.7); The mold closing module guide support mechanism includes a first end plate (4.5.8), a second end plate (4.5.4), a middle plate (4.5.6), and four support guide rods (4.5.5). The first end plate (4.5.8), the second end plate (4.5.4), and the middle plate (4.5.6) are all vertical plates. From one end to the other, the first end plate (4.5.8), the middle plate (4.5.6), and the second end plate (4.5.4) are arranged parallel and perpendicularly on the bottom plate of the mold closing shaft. The first end plate (4.5.8), the middle plate (4.5.6), and the second end plate (4.5.4) are all positioned at the top and bottom near the left and right ends. The shaft through holes are arranged such that the four shaft through holes on the first end plate (4.5.8), the four shaft through holes on the intermediate plate (4.5.6), and the four shaft through holes on the second end plate (4.5.4) are all aligned one-to-one. The four support guide rods (4.5.5) are distributed and installed in the four sets of corresponding shaft through holes. The four support guide rods (4.5.5) are fixedly connected to the first end plate (4.5.8) and the second end plate (4.5.4), and the four support guide rods (4.5.5) are slidably connected to the intermediate plate (4.5.6) through linear bearings. Shaft support seats are fixedly installed at the upper part of the base plate near the left and right sides. The support guide shafts located at the lower part of the left and right sides are axially movable and installed on the two shaft support seats on the corresponding sides. Two assemblies (4.5.7) are mounted opposite each other on the side of the intermediate plate (4.5.6) and the side of the first end plate (4.5.8). A mold-closing half-cavity is provided on the opposite side of the assemblies (4.5.7). When the two assemblies (4.5.7) come into contact, a complete molding cavity is formed inside them. The mold opening and closing drive includes a mold closing cylinder (4.5.2), which is fixedly installed on the second end plate (4.5.4). The power output end of the mold opening and closing drive is driven to the side of the intermediate plate (4.5.6) opposite to the closing module (4.5.7).

7. The high-speed rotary multi-mold blow molding production line according to claim 6, characterized in that: The integrated water, gas, electricity and oil supply device (4.3) includes a water supply unit, a gas supply unit, an electricity supply unit and an oil supply unit; The water supply unit includes an inlet connector (4.3.1), a return connector (4.3.2), and an inlet / return water integrator (4.3.3). The inlet / return water integrator (4.3.3) has an upper and lower sealed, spaced-apart return water chamber (4.3.4) and an inlet water chamber (4.3.5). Multiple return water inlets are evenly distributed circumferentially on the outer wall of the return water chamber (4.3.4), and these inlets are connected via pipelines to the return water inlets on the assembly module (4.5.7) of the multi-combination mold device (4.5). Multiple outlets are evenly distributed circumferentially on the outer wall of the inlet water chamber (4.3.5). The outlet is connected to the inlet of the combined module (4.5.7) of the multi-combination mold device (4.5) through the pipeline; the return water connector (4.3.2) and the inlet water connector (4.3.1) are fitted together with a center gap to form an inlet and return water connector assembly. The center part is the inlet passage and the outer periphery is the return water ring cavity. The inlet and return water connector assembly is a fixed part and the inlet and return water integrator (4.3.3) is a rotating part. It is connected to the bottom of the inlet and return water connector assembly in a relatively rotatable manner. The return water ring cavity and the return water cavity (4.3.4) are sealed and connected. The inlet passage is connected to the inlet water cavity (4.3.5). The gas supply unit includes a gas storage tank (4.3.6), which is fixedly installed at the lower end of the inlet and outlet water integrator (4.3.3). A gas storage chamber is provided inside the gas storage tank (4.3.6). Multiple air outlets are evenly distributed along the circumference on the outer side wall of the gas storage tank (4.3.6). The multiple air outlets are connected to the air inlets of multiple sets of air blowing devices (4.4) through their respective connected air pipes. An air inlet is provided at the center of the bottom of the gas storage tank (4.3.6). The power supply unit is located below the gas storage tank (4.3.6) and includes an internally and externally arranged electrical rotary inlet section (4.3.8) and an electrical rotary outlet section (4.3.7). The electrical rotary outlet section (4.3.7) is a rotating component, and the electrical rotary inlet section (4.3.8) is a fixed component. The oil supply unit includes an outer fixed part (4.3.10), an inner rotating part (4.3.9), a main oil inlet A (4.3.11), a main oil return port A (4.3.14), an oil inlet B (4.3.12), and an oil return port B (4.3.13). The upper end of the outer fixed part (4.3.10) is coaxially and fixedly connected to the lower end of the electric rotary inlet part (4.3.8). The outer fixed part (4.3.10) is connected to the main oil inlet A (4.3.11) and the main oil return port A (4.3.14). The inner rotating part (4.3.9) is connected to the oil inlet B (4.3.12) and the oil return port B (4.3.13). The upper end of the inner rotating part (4.3.9) is fixedly connected to the lower center of the gas storage tank (4.3.6) and is connected to the electric rotary inlet. The rotating part (4.3.7) is fixedly inserted; the main oil inlet A (4.3.11) is connected to the oil inlet B (4.3.12) through the inner rotating part, and the main oil return port A (4.3.14) is connected to the oil return port B (4.3.13) through the inner rotating part. The oil inlet B (4.3.12) is connected to the oil inlet of the mold closing cylinder (4.5.2) of the multi-combination mold device (4.5) through the oil inlet pipe, and the oil return port B (4.3.13) is connected to the oil return port of the mold closing cylinder (4.5.2) of the multi-combination mold device (4.5) through the oil return pipe. An air inlet hole is provided in the center of the inner rotating part (4.3.9). The upper end of the air inlet hole is sealed and connected to the air inlet at the lower end of the air storage tank (4.3.6). The lower end of the air inlet hole is the starting air inlet (4.3.15).

8. The high-speed rotary multi-mold blow molding production line according to claim 1, characterized in that: The part-receiving robot (5) is used to receive the molded plastic part from below when the corresponding mold closing device rotates to the unloading station; the part-receiving robot (5) includes a vertically arranged linear module (5.1), a cantilever arm (5.2), and a receiving groove (5.3); the cantilever arm (5.2) is L-shaped, with its front end of the horizontal arm fixedly connected to the slider on the back of the linear module (5.1), and its lower end of the vertical arm fixedly connected to the upper part of the rear end of the horizontal arm; the vertical arm is composed of a top plate, a top plate, and four support rods connecting the bottom plate and the top plate; the receiving groove (5.3) is composed of a groove bottom, a front baffle, and a rear baffle, forming an upper cavity and a lower cavity inside, the upper cavity being a molded plastic part receiving cavity (5.6), and the lower cavity being a lower material edge receiving cavity (5.7); a connecting relief groove B (5.9) is provided on the rear baffle and the groove bottom corresponding to the relief groove on the top plate.

9. The high-speed rotary multi-mold blow molding production line according to claim 1, characterized in that: The lower edge removal mechanism (6) of the molded part is used to remove the lower edge of the plastic part by clamping the plastic part on both sides and removing it from both sides. The lower edge removal mechanism (6) of the molded part consists of a base plate (6.1), a front platform (6.2) and a rear platform (6.3) that are supported at the same height above the base plate (6.1), two sets of plastic part clamping assemblies (6.4) that are installed opposite to each other on the front platform (6.2) and the rear platform (6.3), and two sets of plastic part clamping assemblies (6.4) that are installed opposite to each other on the base plate (6.1) and located below the front platform (6.2) and the rear platform (6.3). The lower material edge removal assembly (6.5) is provided between the front platform (6.2) and the rear platform (6.3) to allow the lower material edge gap of the molded plastic part to pass through; the two sets of plastic part clamping assemblies (6.4) are each composed of a clamping frame (6.4.1) set on the inner side and a clamping drive (6.4.2) connected to the outer side of the clamping frame (6.4.1). The clamping frame (6.4.1) is used to clamp the upper and lower positions of the molded plastic part and adopts the form of clamping notches. The number of clamping notches is consistent with the number of mold cavities of the mold closing device (4.5); The two sets of lower material edge removal components (6.5) consist of an edge removal block (6.5.1) located on the inner side and an edge removal drive component connected to the outer side of the edge removal block (6.5.1). After the two sets of plastic part clamping components (6.4) clamp and fix the molded plastic part, the edge removal blocks (6.5.1) on both sides move towards each other under the action of their respective edge removal drive components. First, the lower material edge of the plastic part is clamped and fixed. Then, the blanking plate of the molded plastic part clamped by the edge removal blocks (6.5.1) on both sides is shifted to one side to separate the lower material edge from the body of the molded plastic part and complete the removal of the blanking plate. The lower edge removal mechanism (6) and the picking robot (5) of the molded part are conveyed by the rear vertical belt conveyor (10).

10. The high-speed rotary multi-die blow molding production line according to claim 1, characterized in that: The upper edge removal mechanism (7) of the molded part is used to remove the upper and lower edges of the plastic part by clamping the plastic part on both sides and removing it on one side. The upper edge removal mechanism (7) of the molded part includes a frame, a guide rail bracket (7.1), a plastic part clamping and positioning mechanism (7.3), and a single-sided edge removal execution mechanism (7.4). The plastic part clamping and positioning mechanism (7.3) is composed of clamping components on both sides arranged opposite to each other. The guide rail bracket (7.1) is fixedly installed on the upper platform of the frame, and left and right sides are arranged on the guide rail bracket (7.1) in front and behind. The two extended guide rails (7.2) have clamping assemblies on both sides connected to the two ends of the guide rails (7.2) via their respective carriages (7.3.1). Clamping drive cylinders (7.3.2) are connected to the outer sides of both carriages (7.3.1). Positioning clamping blocks (7.3.4) are connected to the inner sides of both carriages (7.3.1) via multiple support rods (7.3.3). The shape of the inner positioning surface of the positioning clamping blocks (7.3.4) on both sides matches the corresponding side shape of the molded plastic part. The positioning clamping blocks (7.3.4) on both sides... The single-sided trimming actuator (7.4) is located inside one side of the slide (7.3.1) and includes a trimming drive cylinder (7.4.1), a trimming pusher block (7.4.2), and a pusher block bracket. The trimming drive cylinder (7.4.1) is vertically and fixedly connected to the inner side of the corresponding side slide (7.3.1). The outer middle part of the pusher block bracket is fixedly connected to the cylinder rod end of the trimming drive cylinder (7.4.1). The inner side of the pusher block bracket is connected to the trimming pusher block (7.4.2). The outer end of the ejector block is vertically fixed, and the inner end of the ejector block is the ejector action end. The shape of the inner end of the ejector block matches the shape of the material edge on the upper part of the molded plastic part. Two guide rods are vertically fixed on the inner side of the slide (7.3.1) on the side where the single-sided ejector mechanism (7.4) is set. The two guide rods are respectively set on both sides of the ejector drive cylinder (7.4.1). Two guide holes are set on the ejector block bracket. Guide sleeves are fixedly installed in the two guide holes. The ejector block bracket forms a support and guide cooperation with the two guide rods through the two guide sleeves.

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