Full-automatic plastic product forming device

Abstract

The invention relates to the technical field of blow molding, and particularly discloses a full-automatic plastic product molding device which comprises a hollow melt blank extrusion unit, a blow molding unit and a molding die, the blow molding unit comprises a vertical side plate, a compressed air source is arranged on the vertical side plate and connected with a blow molding air pipe, and the blow molding air pipe is connected with a blow molding machine. The vertical side plate is fixedly connected with a bottle opening cutting mechanism; the bottle opening cutting mechanism comprises an annular cylinder, one end of the annular cylinder extends to form a connecting plate fixedly connected with the vertical side plate, the center of the upper surface of the annular cylinder extends downwards to form a first convex ring, the periphery of the first convex ring is rotationally connected with a rotating ring body, and at least two cutting assemblies are evenly arranged on the lower surface of the rotating ring body; according to the device, the bottle opening can be subjected to uniform pressure in the circumferential direction, a plastic bottle which is not completely shaped is prevented from being bent and deformed towards one side, the excess materials of the bottle opening are subjected to rotary cutting through the cutting blade subsequently, the excess materials are rapidly cut off, and the cut bottle opening can be kept in a complete circular state.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding, and in particular discloses a fully automatic plastic product molding device. Background Art

[0002] Hollow plastic products mainly include plastic bottles, plastic tubes and other products, which are mainly prepared and formed by blow molding. The specific process is to first prepare the plastic particles into hollow molten billets through a screw extruder, then place them in a molding mold and transfer them to the blow molding station, and then extend the blow molding tube into the billet, use compressed air to expand it and contact with the mold to achieve molding, and finally take out the plastic product after molding, and manually cut off the remaining material or burrs at the bottle mouth.

[0003] For example, the invention patent with application number 202411174424.X discloses a plastic bottle blow molding production equipment, including a machine, an extrusion conveying mechanism and a blow molding mechanism. A table board is fixedly installed on the upper surface of the machine board, a stand is fixedly installed on the upper surface of one side of the machine board, a mounting mechanism and a lifting mechanism are respectively arranged on the upper surfaces of both ends of the stand, the extrusion conveying mechanism is arranged on the inner side of one end of the mounting mechanism, the blow molding mechanism is arranged above the lifting mechanism, rail frames are fixedly installed on the upper surfaces of both sides of the table board, two groups of mounting seats are slidingly arranged between the two rail frames, a molding assembly is arranged between the two mounting seats, and a main driving cylinder is arranged on the outer side of one group of mounting seats, and the main driving cylinder is fixedly installed on the upper surface of one end of the table board; although the design of the present invention can semi-automatically cut off the excess plastic at the bottle mouth of the blow-molded plastic bottle in the later stage, thereby improving the efficiency of blow molding. However, in the process of cutting the bottle mouth, since the bottle mouth has no effective support, the cutting knife is pushed from one side to cut the remaining material of the bottle mouth, which will cause the plastic bottle mouth that has not been completely cooled and shaped to bend to one side. After the cutting is completed, the bottle mouth cannot maintain a complete round state, thus affecting the final product quality. Therefore, in view of the above-mentioned shortcomings of the existing plastic bottle blow molding production equipment, this application proposes a specially designed fully automatic plastic product molding device to solve the technical problems existing in the plastic product blow molding cutting process. Summary of the invention

[0004] The purpose of the present invention is to provide a fully automatic plastic product forming device to solve the problem that the existing plastic bottle blow molding production equipment may cause the product bottle mouth to deform when cutting the bottle mouth.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fully automatic plastic product forming device, comprising a hollow molten billet extrusion unit and a blow molding unit, wherein a movable and switchable forming mold is arranged between the hollow molten billet extrusion unit and the blow molding unit, wherein the blow molding unit comprises a vertical side plate, wherein a compressed air source is arranged on the vertical side plate, wherein the compressed air source is connected to a vertically arranged blow molding air pipe through a hose, and wherein a bottle mouth cutting mechanism for penetrating the blow molding air pipe is fixedly connected to the vertical side plate;

[0007] The bottle mouth cutting mechanism comprises a ring cylinder, one end of which is extended with a connecting plate fixedly connected to the vertical side plate, a first convex ring is extended downward from the center of the upper surface of the ring cylinder, the outer periphery of the first convex ring is rotatably connected with a rotating ring body located in the inner cavity of the ring cylinder through a bearing, and a driving assembly for driving the rotating ring body to rotate is arranged on the ring cylinder;

[0008] At least two cutting assemblies are evenly arranged on the lower surface of the rotating ring body, and the cutting assembly includes a convex plate fixedly connected to the rotating ring body, and a guide rod extending radially outward is arranged on the convex plate, a radially movable knife seat is slidably connected to the guide rod, and a spring is connected between the knife seat and the convex plate, a radially inward cutting blade is arranged on the knife seat, and an abutment wheel is rotatably connected to the radial outer end of the knife seat, the abutment wheel is flush with the lower end of the ring cylinder, and a guide groove wall acting on the abutment wheel is opened at the lower end of the ring cylinder, and the guide groove wall is composed of a plurality of circular arc segments and outer concave segments connected in sequence.

[0009] As a further arrangement of the above scheme, vertical roller frames are symmetrically arranged at both ends of the upper surface of the ring cylinder, and vertically rowed duct wheels are arranged on the two roller frames. The blow molding air pipe is arranged to move up and down along the wheel gap between the two duct wheels, and a lifting motor for driving the duct wheels to rotate is arranged on the roller frame.

[0010] As a further configuration of the above scheme, a knife groove ring is provided in the middle section of the blow molding air pipe, and a ring-shaped knife groove matching the tip of the cutting blade is opened at the lower end of the outer circular surface of the knife groove ring, and a plurality of air outlet holes are evenly opened on the blow molding air pipe located below the knife groove ring.

[0011] As a further configuration of the above scheme, the inner ring of the rotating ring body extends upward with a second convex ring connected to the bearing, the outer circular surface of the rotating ring body is provided with an annular tooth surface, the driving assembly includes a rotating motor fixed on the ring cylinder, and the motor shaft of the rotating motor is provided with a gear meshing with the annular tooth surface.

[0012] As a further configuration of the above scheme, the molding mold includes a first mold box and a second mold box, the opposite sides of the first mold box and the second mold box are both provided with a semi-molding mold cavity, and a guide hole and guide rod positioning piece is provided between the first mold box and the second mold box.

[0013] As a further configuration of the above scheme, a rotation switching mechanism is provided between the hollow molten billet extrusion unit and the blow molding unit, and molding molds are provided at both ends of the rotation switching mechanism.

[0014] As a further configuration of the above scheme, the rotary switching mechanism includes a fixed vertical cylinder, a vertical shaft is rotatably arranged in the vertical cylinder, and a driving motor for driving the vertical shaft to rotate is arranged at the side end of the vertical cylinder, the top end of the vertical shaft is connected to a carrier plate, the two first mold boxes are fixedly arranged at the two outer ends of the carrier plate, the two second mold boxes are slidably connected to the slide rails on the carrier plate, and a clamping cylinder connected to the second mold box is arranged on the carrier plate.

[0015] As a further configuration of the above scheme, the hollow molten billet extrusion unit includes a stand and a screw extruder fixed on the top of the stand, a feeding hopper is connected to the upper surface of one end of the screw extruder, and a hollow molten billet forming die is connected to the other end, and a heating box is arranged on the periphery of the screw extruder, and a multi-stage heater is arranged in the heating box.

[0016] As a further configuration of the above scheme, the compressed gas source includes a compressed gas tank, a gas outlet end of the compressed gas tank is connected to a solenoid valve, and an end of the hose is connected to the solenoid valve.

[0017] As a further configuration of the above scheme, a control console is also included, and the hollow molten billet extrusion unit, the blow molding unit and the bottle mouth cutting mechanism are all electrically connected to the control console.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The fully automatic plastic product forming device disclosed in the present invention adopts a specially designed bottle mouth cutting mechanism. When the plastic product is formed and the bottle mouth residue needs to be cut off, the rotating ring body is directly driven to rotate by a rotating motor. Then, during the rotation of the rotating ring body, the action between the abutting wheel and the guide groove wall can make at least two cutting blades move radially inward and pass through the bottle mouth residue, and then the bottle mouth residue is peeled and cut by multiple groups of cutting blades at the same time. Compared with the traditional cutting blade pushing from one side to complete the cutting process, the bottle mouth can be subjected to circumferentially uniform pressure, avoiding the bending and deformation of the incompletely formed plastic bottle to one side, and the subsequent peeling of the bottle mouth residue by the cutting blade not only realizes the rapid removal of the residue, but also enables the bottle mouth to maintain a complete circular state after cutting, thereby ultimately ensuring product quality.

[0020] 2. The blow molding air pipe in the present invention adopts two rows of duct wheels for limiting clamping and is driven by the duct wheels, so that it can be accurately moved up and down and inserted into the hollow blank. At the same time, the knife groove ring provided can support the bottle mouth of the plastic bottle during the cutting process, avoiding the bottle mouth of the cutting blade from deforming to one side during the pressing process, and further ensuring the quality of the residual material of the bottle mouth of the plastic bottle after cutting.

[0021] 3. The present invention also realizes the rapid switching of the two molding dies between the hollow molten billet extrusion unit and the blow molding unit through the designed rotary switching mechanism, so that the hollow molten billet extrusion process can be synchronized with the blow molding and bottle mouth cutting process, thereby effectively ensuring the efficiency of the entire device in producing plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure from a first angle of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure from a second angle of the present invention;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the forming mold and the rotary switching mechanism in the present invention;

[0026] Figure 4 It is a schematic diagram of the unfolded three-dimensional structure of the forming mold in the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the blow molding unit and the bottle mouth cutting mechanism in the present invention from a first angle;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the blow molding unit and the bottle mouth cutting mechanism in the present invention from a second angle;

[0029] Figure 7 It is a schematic diagram of the internal three-dimensional structure of the bottle mouth cutting mechanism in the present invention;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the blow molding air pipe, roller frame, catheter wheel, etc. in the present invention;

[0031] Fig. 9 For the present invention Figure 7 A schematic diagram of the enlarged structure at A in the middle;

[0032] Fig.10 It is a schematic diagram of the internal planar structure of the hollow molten billet extrusion unit in the present invention.

[0033] in:

[0034] 1- hollow molten billet extrusion unit, 101- stand, 102- screw extruder, 103- hopper, 104- hollow molten billet forming die, 105- heating box, 106- multi-stage heater;

[0035] 2-blow molding unit, 201-vertical side plate, 202-compressed air source, 2021-hose, 203-blow molding air pipe, 204-roller frame, 205-duct wheel, 206-lifting motor, 207-knife groove ring, 2071-annular knife groove, 208-solenoid valve;

[0036] 3-forming mold, 301-first mold box, 302-second mold box, 303-semi-forming mold cavity, 304-guide hole guide rod positioning piece;

[0037] 4-bottle mouth cutting mechanism, 401-ring cylinder, 402-connecting plate, 403-first convex ring, 404-bearing, 405-rotating ring body, 406-convex plate, 407-guide rod, 408-knife seat, 409-spring, 410-cutting blade, 411-abutting wheel, 412-guide groove wall, 4121-circular arc segment, 4122-outer concave segment, 413-second convex ring, 414-annular tooth surface, 415-rotating motor, 416-gear;

[0038] 5-rotation switching mechanism, 501-vertical cylinder, 502-vertical shaft, 503-driving motor, 504-carrier plate, 505-slide rail, 506-mold clamping cylinder;

[0039] 6-Console. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 10 , and describes the application in detail with reference to embodiments.

[0042] Example 1

[0043] Embodiment 1 discloses a fully automatic plastic product forming device, Figure 1 and attached Figure 2 The main body of the device includes a hollow molten billet extrusion unit 1 and a blow molding unit 2, and a movable switching molding die 3 is arranged between the hollow molten billet extrusion unit 1 and the blow molding unit 2, so that the extruded hollow molten billet is received by the molding die 3 and then transferred to the blow molding unit 2 for blow molding.

[0044] The specific structure of the molding die 3 is shown in the attached Figure 4 It includes a first mold box 301 and a second mold box 302. Semi-molding cavities 303 are provided on opposite sides of the first mold box 301 and the second mold box 302. A guide hole and guide rod positioning member 304 is provided between the first mold box 301 and the second mold box 302. The relative movement of the two first mold boxes 301 and the second mold box 302 realizes mold opening and closing actions.

[0045] The specific structure of the hollow molten billet extrusion unit 1 is shown in the attached Fig.10 It includes a stand 101 and a screw extruder 102 fixed on the top of the stand 101, a feeding hopper 103 is connected to the upper surface of one end of the screw extruder 102, and a hollow molten billet forming die 104 is connected to the other end. A heating box 105 is arranged on the periphery of the screw extruder 102, and a multi-stage heater 106 is arranged in the heating box 105.

[0046] Reference Figure 5 and attached Figure 6 The blow molding unit 2 includes a vertical side plate 201, on which a compressed air source 202 is arranged, and the compressed air source 202 is connected to a vertically arranged blow molding air pipe 203 through a hose 2021, and a bottle mouth cutting mechanism 4 for penetrating the blow molding air pipe 203 is fixedly connected to the vertical side plate 201. The specific compressed air source 202 can be a compressed air tank, and a solenoid valve 208 is connected to the gas outlet end of the compressed air tank, and then the end of the hose 2021 is connected to the solenoid valve 208, and the compressed air is turned on and off by controlling the solenoid valve 208.

[0047] Reference Figure 6 , Attachment Figure 7 and attached Fig. 9The bottle mouth cutting mechanism 4 includes a ring cylinder 401, and the blow molding air pipe 203 is arranged along the central axis of the ring cylinder 401. A connecting plate 402 fixedly connected to the vertical side plate 201 is extended at one end of the ring cylinder 401, a first convex ring 403 is extended downward at the center of the upper surface of the ring cylinder 401, and then a rotating ring body 405 located in the inner cavity of the ring cylinder 401 is rotatably connected to the outer periphery of the first convex ring 403 through a bearing 404. In the specific arrangement, a second convex ring 413 connected to the bearing 404 is extended upward from the inner ring of the rotating ring body 405, and the stable rotation of the rotating ring body 405 is achieved through the connection between the bearing 404, the first convex ring 403 and the second convex ring 413.

[0048] A driving assembly for driving the rotating ring body 405 to rotate is arranged on the ring cylinder 401. The specific driving assembly includes a rotating motor 415 fixed on the ring cylinder 401, a gear 416 is arranged on the motor shaft of the rotating motor 415, and then an annular tooth surface 414 meshing with the gear 416 is arranged on the outer circumferential surface of the rotating ring body 405, so that under the power input of the rotating motor 415 and the connection of the bearing 404, the rotating ring body 405 can stably rotate at a set speed inside the ring cylinder 401.

[0049] The lower surface of the rotating ring body 405 is evenly provided with no less than two cutting assemblies, which can be specifically set to 2-4 groups. The cutting assemblies in this figure are provided with two groups. Among them, the cutting assembly includes a convex plate 406 fixedly connected to the rotating ring body 405, a guide rod 407 extending radially outward is provided on the convex plate 406, a radially movable knife seat 408 is slidably connected to the guide rod 407, and a spring 409 is connected between the knife seat 408 and the convex plate 406. A radially inward cutting blade 410 is provided on the knife seat 408, and the radial outer end of the knife seat 408 is rotatably connected to an abutment wheel 411, and the abutment wheel 411 is flush with the lower end of the ring cylinder 401. A guide groove wall 412 that acts on the abutment wheel 411 is provided at the lower end of the ring cylinder 401, and the guide groove wall 412 is composed of a plurality of circular arc segments 4121 and an outer concave segment 4122 connected in sequence. In addition, a knife groove ring 207 is provided in the middle section of the blow molding air pipe 203, and a ring-shaped knife groove 2071 adapted to the tip of the cutting blade 410 is provided at the lower end of the outer circumferential surface of the knife groove ring 207, and a plurality of air outlet holes 2031 are evenly provided on the blow molding air pipe 203 below the knife groove ring 207.

[0050] Finally, in order to realize the up and down movement of the blow molding air pipe 203 along the central axis direction of the ring cylinder 401, vertical roller frames 204 are symmetrically arranged at both ends of the upper surface of the ring cylinder 401, and vertically arranged duct wheels 205 are arranged on the two roller frames 204. Then, the blow molding air pipe 203 is moved up and down along the wheel gap between the two duct wheels 205, and a lifting motor 206 for driving the duct wheel 205 to rotate is arranged on the roller frame 204.

[0051] During operation of the fully automatic plastic product forming device disclosed in this embodiment 1, the hollow molten billet extrusion unit 1 extrude and melt the plastic particles, and a hollow molten billet is formed through the action of the hollow molten billet forming die head 104, and the billet is placed inside the forming mold 3.

[0052] Then, the empty molten blank is moved to the bottom of the plastic air tube 203 by moving the forming mold 3, and then the lifting motor 206 is started to rotate the duct wheel 205. Then, the plastic air tube 203 is moved vertically downward and inserted into the hollow inner cavity of the blank by the action of the two rows of duct wheels 205. At the same time, the knife groove ring 207 is placed on the upper end of the through hole on the upper surface of the forming mold 3.

[0053] Then, the electromagnetic valve 208 is opened to pass high-pressure air into the plastic air pipe 203, and then discharged from the plastic air pipe 203 to make the molten blank expand in all directions until it contacts the inner wall of the forming mold 3, thereby limiting its further expansion and cooling it to shape.

[0054] After the plastic product (plastic bottle) is cooled, the rotating motor 415 is started, and then the rotating ring body 405 is rotated around the central axis of the blow molding air pipe 203 under the meshing transmission of the gear 416 and the annular tooth surface 414. After the rotating ring body 405 rotates, the abutting wheel 411 originally abutting against the outer concave section 4122 gradually interacts with the arc section 4121, so that the knife seat 408 overcomes the force of the spring 409 and moves radially inward until the tip of the cutting blade 410 passes through the excess material of the upper end of the bottle mouth of the plastic bottle and interacts with the annular knife groove 2071, and then in the subsequent rotation process of the rotating ring body 405, the excess material or burrs at the upper end of the bottle mouth can be cut and removed by the cutting blade 410, until the abutting wheel 411 rotates to the outer concave section 4122 so that the cutting blade 410 moves radially outward to achieve reset, and after the reset is completed, the lifting motor 206 is reversely started to extract the blow molding air pipe 203 from the plastic bottle, and finally the molding mold 3 is opened to take it out.

[0055] Example 2

[0056] Example 2 discloses a fully automatic plastic product forming device that is improved based on the technical solution in Example 1, and the similarities between it and Example 1 are not described again.

[0057] Reference Figure 1 , Attachment Figure 2 and attached Figure 3 In this embodiment 2, a rotary switching mechanism 5 is provided between the hollow molten billet extrusion unit 1 and the blow molding unit 2, and then molding molds 3 are provided at both ends of the rotary switching mechanism 5.

[0058] The specific rotating switching mechanism 5 includes a fixed vertical cylinder 501, in which a vertical shaft 502 is rotatably arranged, and a driving motor 503 for driving the vertical shaft 502 to rotate is arranged at the side end of the vertical cylinder 501, and the driving motor 503 can realize the rotation of the vertical shaft 502 by gear transmission or belt transmission. A carrier plate 504 is connected to the top of the vertical shaft 502, and the two first mold boxes 301 are fixedly arranged at the two outer ends of the carrier plate 504, and then the two second mold boxes 302 are slidably connected to the slide rails 505 on the carrier plate 504, and a mold clamping cylinder 506 connected to the second mold box 302 is also arranged on the carrier plate 504, and the opening and closing action of the molding mold 3 is realized by controlling the extension and contraction of the mold clamping cylinder 506.

[0059] Finally, this embodiment 2 is also provided with a control console 6, and the hollow molten billet extrusion unit 1, the blow molding unit 2, the bottle mouth cutting mechanism 4 and the rotary switching mechanism 5 are all electrically connected to the control console 6, and the operation of the entire fully automatic plastic product molding device is directly controlled by the control console 6.

[0060] In this embodiment 2, a rotating switching mechanism 5 is designed to achieve rapid switching of the two molding dies 3 between the hollow molten billet extrusion unit 1 and the blow molding unit 2, so that the hollow molten billet extrusion process can be synchronized with the blow molding and bottle mouth cutting processes, thereby effectively ensuring the efficiency of the entire device in producing plastic products.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully automatic plastic product forming device, comprising a hollow molten billet extrusion unit (1) and a blow molding unit (2), wherein a movable and switchable forming die (3) is arranged between the hollow molten billet extrusion unit (1) and the blow molding unit (2), characterized in that: The blow molding unit (2) comprises a vertical side plate (201), a compressed air source (202) is arranged on the vertical side plate (201), the compressed air source (202) is connected to a vertically arranged blow molding air pipe (203) via a hose (2021), and a bottle mouth cutting mechanism (4) for penetrating the blow molding air pipe (203) is fixedly connected to the vertical side plate (201); The bottle mouth cutting mechanism (4) comprises a ring cylinder (401), one end of which is extended with a connecting plate (402) fixedly connected to the vertical side plate (201), a first convex ring (403) extending downward from the center of the upper surface of the ring cylinder (401), the outer periphery of the first convex ring (403) being rotatably connected to a rotating ring body (405) located in the inner cavity of the ring cylinder (401) via a bearing (404), and a driving assembly for driving the rotating ring body (405) to rotate is arranged on the ring cylinder (401); The lower surface of the rotating ring body (405) is evenly provided with no less than two cutting assemblies, and the cutting assembly includes a convex plate (406) fixedly connected to the rotating ring body (405), and the convex plate (406) is provided with a guide rod (407) extending radially outward, and the guide rod (407) is slidably connected with a radially movable knife seat (408), and a spring (409) is connected between the knife seat (408) and the convex plate (406), and the knife seat (408) and the convex plate (406) are connected to each other. A radially inward cutting blade (410) is arranged on the seat (408), and a radially outer end of the blade seat (408) is rotatably connected to an abutment wheel (411), wherein the abutment wheel (411) is flush with the lower end of the annular tube (401), and a guide groove wall (412) that interacts with the abutment wheel (411) is formed at the lower end of the annular tube (401), and the guide groove wall (412) is composed of a plurality of circular arc segments (4121) and outer concave segments (4122) connected in sequence.

2. A fully automatic plastic product forming device according to claim 1, characterized in that: Vertical roller frames (204) are symmetrically arranged at both ends of the upper surface of the ring cylinder (401), and vertically arranged duct wheels (205) are arranged on the two roller frames (204). The blow molding air pipe (203) is arranged to move up and down along the wheel gap between the two duct wheels (205), and a lifting motor (206) for driving the duct wheels (205) to rotate is arranged on the roller frames (204).

3. A fully automatic plastic product forming device according to claim 2, characterized in that: The middle section of the blow molding air pipe (203) is provided with a knife groove ring (207), the lower end of the outer circumferential surface of the knife groove ring (207) is provided with an annular knife groove (2071) adapted to the tip of the cutting blade (410), and a plurality of air outlet holes (2031) are evenly provided on the blow molding air pipe (203) located below the knife groove ring (207).

4. The fully automatic plastic product forming device according to claim 1, characterized in that: The inner ring of the rotating ring body (405) extends upward to form a second convex ring (413) connected to the bearing (404); the outer circumferential surface of the rotating ring body (405) is provided with an annular tooth surface (414); the driving assembly includes a rotating motor (415) fixed on the ring cylinder (401); and the motor shaft of the rotating motor (415) is provided with a gear (416) meshing with the annular tooth surface (414).

5. The fully automatic plastic product forming device according to claim 1, characterized in that: The molding die (3) comprises a first mold box (301) and a second mold box (302), wherein opposite sides of the first mold box (301) and the second mold box (302) are provided with a semi-molding mold cavity (303), and a guide hole and guide rod positioning member (304) is provided between the first mold box (301) and the second mold box (302).

6. A fully automatic plastic product forming device according to claim 5, characterized in that: A rotation switching mechanism (5) is provided between the hollow molten billet extrusion unit (1) and the blow molding unit (2), and molding dies (3) are provided at both ends of the rotation switching mechanism (5).

7. A fully automatic plastic product forming device according to claim 6, characterized in that: The rotary switching mechanism (5) comprises a fixedly arranged vertical cylinder (501), a vertical shaft (502) being rotatably arranged in the vertical cylinder (501), and a driving motor (503) for driving the vertical shaft (502) to rotate is arranged at the side end of the vertical cylinder (501), a carrier plate (504) is connected to the top end of the vertical shaft (502), two first mold boxes (301) are fixedly arranged at two outer ends of the carrier plate (504), two second mold boxes (302) are slidably connected to the slide rails (505) on the carrier plate (504), and a mold clamping cylinder (506) connected to the second mold box (302) is arranged on the carrier plate (504).

8. The fully automatic plastic product forming device according to claim 1, characterized in that: The hollow molten billet extrusion unit (1) comprises a stand (101) and a screw extruder (102) fixed on the top of the stand (101); a feeding hopper (103) is connected to the upper surface of one end of the screw extruder (102); and a hollow molten billet forming die (104) is connected to the other end; a heating box (105) is arranged on the periphery of the screw extruder (102), and a multi-stage heater (106) is arranged in the heating box (105).

9. The fully automatic plastic product forming device according to claim 1, characterized in that: The compressed gas source (202) comprises a compressed gas tank, the gas outlet end of the compressed gas tank is connected to a solenoid valve (208), and the end of the hose (2021) is connected to the solenoid valve (208).

10. The fully automatic plastic product forming device according to claim 1, characterized in that: It also comprises a control console (6), and the hollow molten billet extrusion unit (1), the blow molding unit (2) and the bottle mouth cutting mechanism (4) are all electrically connected to the control console (6).

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