Blow molding nozzle and blow molding machine

Abstract

The present invention relates to the technical field of blow molding, specifically to a blow molding nozzle and a blow molding machine, comprising a blow molding nozzle body, a blow molding port is provided at the center of the blow molding nozzle body, and the blow molding port is connected to an external air pipe, a one-way valve is provided at the bottom end of the blow molding port to prevent plastic from entering, a gas sealing ring is wound around the side wall of the top end of the blow molding nozzle body, and auxiliary mechanisms for filling the gas sealing ring are provided on both sides of the top end of the blow molding nozzle body. The present invention pushes piston 4 to inject the gas in the cylinder into the gas sealing ring, so that the gas sealing ring expands, thereby squeezing the semicircular card seat, so that the connection between the blow molding nozzle body and the semicircular card seat can be sealed, air leakage can be avoided during the blow molding process, pitting can be avoided in the finished product, and the quality of the finished product can be improved. The plastic is cut by a cutting plate, so that the rough blank can be cut neatly, and the plastic and the rough blank can be prevented from sticking.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding, in particular to a blow molding nozzle and a blow molding machine. Background Art

[0002] Blow molding mainly refers to hollow blow molding, which is a method of using gas pressure to inflate the hot melt parison closed in the mold to form a hollow product. It is a rapidly developing plastic molding method. The mold used for blow molding is only a female mold (concave mold). Compared with injection molding, the equipment cost is lower, the adaptability is stronger, the molding performance is good, and the products with complex undulating curves can be molded. Blow molding originated in the 1830s. It was not until after 1979 that blow molding entered the stage of widespread application. At this stage, blow molding-grade plastics include: polyolefins, engineering plastics and elastomers; the application of blow molding products involves automobiles, office equipment, household appliances, medical care and other aspects; 60,000 bottles can be produced per hour, and large blow molding parts can also be manufactured. Multi-layer blow molding technology has been greatly developed. Hollow blow molding is divided into injection blow molding, extrusion blow molding and stretch blow molding. Injection blow molding is to use injection molding to first make a plastic parison with a bottom, and then move the parison into the blow mold for blow molding. In the extrusion blow molding process, the tube billet is directly extruded by the extruder and hung in a pre-separated cavity installed just below the die head; when the hanging billet reaches the specified length, the mold is immediately closed and the tube billet is cut by the incision of the mold; compressed air is introduced from the small holes on the parting surface of the mold to inflate the billet and form it close to the mold wall; and the blow molding process is: material preparation, plasticization, material storage, parison extrusion, parison transfer, mold closing, blowing, cooling, mold opening, modification and inspection.

[0003] The existing extrusion blow molding center hole forming machine is mainly composed of an extruder, a die, a mold clamping device, a blowing device, a hydraulic transmission device, a heating and cooling control system and an electrical control system. The extruder cooperates with the die to manufacture a rough blank of a plastic part in a rough blank forming bin, and then the rough blank is moved from the rough blank forming bin to a forming mold, and then the rough blank is blow-molded by a blowing device. After cooling, a finished product can be obtained. However, during the blow molding process, the sealing effect of the blow molding nozzle body is prone to problems, which can easily cause pitting on the finished product and affect product quality. At the same time, during the production process, the rough blank cannot be cut off from the raw material and blocked at the same time when the rough blank is made. The flowing raw material is easy to re-adhere to the rough blank, and a large amount of residual material is easy to be generated. The residual material needs to be cut off, which reduces the processing speed and affects the production efficiency.

[0004] To this end, a blow molding nozzle and a blow molding machine are proposed. Summary of the invention

[0005] The object of the present invention is to provide a blow molding nozzle and a blow molding machine. An auxiliary mechanism is set to push piston four to inject the gas in the cylinder into the gas sealing ring, so that the gas sealing ring expands, and the connection between the blow molding nozzle body and the semicircular holder can be sealed. At the same time, the cutting plate is pushed to cut the plastic by pushing the push rod two, and the bottom end of the rough blank molding bin is blocked by the cutting plate, which can prevent the plastic from continuing to be injected, and can make the rough blank cut neatly. At the same time, it can prevent the plastic from sticking to the rough blank, so as to solve the problems raised in the above-mentioned background technology.

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

[0007] A blow molding nozzle comprises a blow molding nozzle body, a blow molding port is provided at the center of the blow molding nozzle body, and the blow molding port is connected to an external air pipe, a one-way valve is provided at the bottom end of the blow molding port to prevent plastic from entering, a gas sealing ring is wound around the side wall of the top end of the blow molding nozzle body, and auxiliary mechanisms for filling the gas sealing ring are provided on both sides of the top end of the blow molding nozzle body.

[0008] During use, the blow molding port is inflated through an external air pipe for blow molding. The one-way valve in the blow molding port allows gas to be blown, while preventing plastic from entering the blow molding port during the rough embryo production process and preventing the blow molding port from being blocked, which is beneficial to the blow molding of the rough embryo.

[0009] Preferably, the auxiliary mechanism includes a connecting rod 1, and the connecting rod 1 is movably installed in the blow molding nozzle body through a rotating shaft, the top of the connecting rod 1 is movably connected to a movable rod 1, the bottom of the connecting rod 1 is movably connected to a movable rod 2, and the movable rod 1 and the movable rod 2 are parallel to each other, a spring 1 is arranged between the connecting rod 1 and the blow molding nozzle body, a cylinder is arranged on the outside of the movable rod 2, and the cylinder is connected to a gas sealing ring, a piston 4 is movably installed in the cylinder, and one end of the piston 4 extends to the outside of the cylinder and is fixedly connected to the movable rod 2.

[0010] When the movable rod 1 is squeezed, the spring 1 is in a compressed state, and the connecting rod 1 connected to the movable rod 1 can rotate in the blow molding nozzle body through the rotating shaft, thereby driving the movable rod 2 to push the piston 4 to inject the gas in the cylinder into the gas sealing ring, thereby making the gas sealing ring expand and sealing the connection between the blow molding nozzle body and the semicircular seat, thereby avoiding air leakage during the blow molding process and pitting on the finished product, thereby improving the quality of the finished product, and when the pressure on the movable rod 1 disappears, the spring 1 can push the movable rod 1 to recover, and at the same time the piston 4 can draw the gas in the gas sealing ring into the cylinder, thereby facilitating the retraction and release of the gas sealing ring.

[0011] A blow molding machine, comprising a workbench, a heating box, a support table, a hopper, a valve, a heating bin, an infrared heater, a stirring shaft and a motor, a plastic extruder is arranged inside the workbench, a connecting pipe is arranged between the plastic extruder and the heating bin, a valve is arranged on the top of the connecting pipe, a discharge pipe is fixedly connected to one end of the plastic extruder, a base is arranged on one side of the discharge pipe, an electric slide rail is arranged on the top wall of the workbench, a driver is movably installed on the electric slide rail, two electric telescopic rods electrically connected to a power supply are symmetrically fixedly connected to the bottom end of the driver, and the bottom ends of the two electric telescopic rods are fixed together A connecting seat is connected, a rough blank forming bin is provided at the upper end of the base, and a discharge pipe extends into the base and is communicated with the rough blank forming bin, a cutting mechanism is provided at the bottom side of the rough blank forming bin, the blow molding nozzle body described in any one of the above claims is movably inserted in the rough blank forming bin, and the blow molding nozzle body is fixedly connected to the center of the bottom end of the connecting seat, a molding mold for rough blank blow molding is provided on the side of the base away from the plastic extruder, a conveyor belt for conveying finished products is provided on the bottom side of the molding mold, a motor 2 for driving the conveyor belt is provided on one side of the conveyor belt, and an inclined slide for conveying finished products outside the workbench is provided on the side of the conveyor belt away from the base.

[0012] First, pour the plastic particles into the upper hopper, open valve 1 to allow the plastic particles to enter the heating bin in the heating box, and heat up through the infrared heater. During the heating process, the motor 1 drives the stirring shaft to stir the plastic particles, so that the plastic particles can be heated evenly, melted faster, and work efficiency can be improved. Next, open valve 2 to introduce the melted plastic into the plastic extruder through the connecting pipe, and use the driver 2 to make the two sets of semicircular seats fit with the blow molding nozzle body, and then use the driver 1 to move the blow molding nozzle body to the top of the base, and further insert the blow molding nozzle body into the rough blank molding bin through the electric telescopic rod 1, and then inject plastic into the rough blank molding bin to make a rough blank. After the rough blank is made, the rough blank is moved to the molding mold through the driver 1 and the electric telescopic rod 1 for blow molding. After molding, the finished product is transported to the inclined slide through the conveyor belt, and further transported to the outside of the workbench for collection, which can save labor and further reduce production costs.

[0013] Preferably, the cutting mechanism includes a support rod 2, an air pump 2 is arranged inside the support rod 2, a piston 3 is arranged on one side of the air pump 2, an end of the piston 3 away from the air pump 2 is fixedly connected to a push rod 2, one end of the push rod 2 extends to the outside of the support rod 2 and is fixedly connected to a cutting plate, and the cutting plate is in contact with the bottom wall of the rough blank forming bin, a spring 4 is wound around the outside of the push rod 2, and the spring 4 is located between the piston 3 and the inner wall of the support rod 2, and a pressure detection mechanism is arranged on one side wall of the rough blank forming bin.

[0014] When the air pump 2 is powered on, gas can be introduced to move the piston 3, which can further push the push rod 2 to make the cutting plate cut the plastic, and block the bottom of the rough blank forming bin through the cutting plate, so as to prevent the plastic from continuing to be injected, and to make the rough blank cut neatly. At the same time, it can prevent the plastic from sticking to the rough blank and avoid the generation of residual material. When the air pump 2 is powered off, the spring 4 can restore and push the piston 3 back to its original position, so that the cutting plate can be restored, which is convenient for continuing to make the rough blank.

[0015] Preferably, the pressure detection mechanism includes a connecting rod 2, one end of which is fixedly connected to a movable plate, and the movable plate fits tightly with the rough blank forming bin, the other end of which is fixedly connected to a terminal head 1, one side of which is provided with a terminal socket 1 that matches the terminal head 1, and the terminal socket 1 is electrically connected to the air pump 2, and a spring 3 is wound around the outer side of the connecting rod 2, and the spring 3 is located between the movable plate and the side wall of the base.

[0016] When the plastic is injected into the rough blank forming chamber, the movable plate is subjected to pressure to push the connecting rod 2 to move. When the terminal head 1 at the bottom end of the connecting rod 2 is connected to the terminal seat 1, the air pump 2 can be energized, so that the cutting mechanism can start working. The remaining material can be cut while the rough blank is being made, which is convenient for control. When the rough blank is taken out, the spring 3 can push the movable plate to its original position, which is convenient for continued inspection.

[0017] Preferably, two electric slide rails 2 are symmetrically arranged at the bottom end of the connecting seat, semicircular holders are slidably mounted on the two electric slide rails 2, and drivers 2 cooperating with the electric slide rails 2 are arranged on the top walls of the two semicircular holders, plug blocks of starting auxiliary mechanisms are arranged on the inner sides of the two semicircular holders, wiring seats 2 are arranged in the bottom walls of the two semicircular holders, and two wiring heads 2 cooperating with the wiring seats 2 are symmetrically arranged on the top wall of the base, the plastic extruder comprises a piston 2, a support rod 1 for pushing the piston 2 is arranged on one side of the piston 2, an air pump 1 is arranged in the support rod 1, a piston 1 is arranged on one side of the air pump 1, a push rod 1 is arranged at one end of the piston 1, and the push rod 1 is fixedly connected to the piston 2, a spring 2 is arranged on the outer side of the push rod 1, and the spring 2 is located between the piston 1 and the inner wall of the support rod 1.

[0018] When the semicircular holder contacts the main body of the blow molding nozzle, the plug block can be inserted into the main body of the blow molding nozzle to squeeze the movable rod 1, so that the auxiliary mechanism starts working. At the same time, when the terminal block 2 at the bottom end of the semicircular holder is connected to the terminal head 2 on the base, the circuit of the air pump 1 can be connected, so that the air pump 1 discharges gas to squeeze the piston 1, pushing the push rod 1 and the piston 2 to move inward, thereby injecting the plastic from the discharge pipe into the rough blank molding bin. When the rough blank moves into the molding mold, the terminal block 2 is separated from the terminal head 2, thereby cutting off the power to the air pump 1, and the spring 2 pushes the piston 1 to the initial position, which is convenient for continuing to inject plastic.

[0019] Preferably, the molding mold includes two symmetrically arranged outer molds, and the outer side walls of the two outer molds are fixedly connected with two electric telescopic rods for moving the outer molds, the tops of the two outer molds are provided with openings that cooperate with the semicircular holder, the two outer molds are provided with inner molds for blow molding, and the bottom ends of the two inner molds are jointly and movably provided with a bottom plate, four limiting holes are symmetrically opened on the inner wall of one of the outer molds, and four limiting columns that cooperate with the four limiting holes are provided on the inner wall of the other outer mold, and limiting mechanisms are provided in the four limiting columns.

[0020] When the blow molding nozzle body and the semicircular holder move between the two sets of outer molds, the electric telescopic rod 2 works to close the two sets of outer molds. At the same time, the semicircular holder fits the opening, and the bottom plate between the inner molds can play a supporting role during the blow molding process, which is beneficial to the molding of the rough embryo.

[0021] Preferably, the limiting mechanism includes an electromagnet, the electromagnet and the electric telescopic rod 2 are electrically connected to a power supply, and the electromagnet and the electric telescopic rod 2 are connected in series with each other, iron blocks are provided on both sides of the electromagnet, and one end of the two iron blocks away from the electromagnet is fixedly connected to a limiting pin, and the outer side of the limiting pin is fixedly connected to a limiting plate, and a spring 5 is provided between the limiting plate and the electromagnet.

[0022] When the electric telescopic rod 2 is powered on, the electromagnet connected in series with the electric telescopic rod 2 is energized at the same time, so the electromagnet can absorb the iron block, so that the limit pin can be retracted into the limit column, and the spring five is in a compressed state. When the two sets of outer molds are fitted against each other, the electric telescopic rod 2 is powered off, and the limit column can be inserted into the limit hole, and the electromagnet begins to be powered off, so the spring five can push the limit pin out, so that the limit column is fixed in the limit hole, so that the two outer molds can be tightly connected, which can prevent the two sets of outer molds from being pushed apart due to the high pressure during the blow molding process, resulting in reduced product quality, and is conducive to product molding.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. By setting an auxiliary mechanism, when the movable rod 1 is squeezed, the spring 1 is in a compressed state, and the connecting rod 1 connected to the movable rod 1 can rotate in the blow molding nozzle body through the rotating shaft, so that the movable rod 2 can be driven to push the piston 4 to inject the gas in the cylinder into the gas sealing ring, so that the gas sealing ring can be expanded, and the connection between the blow molding nozzle body and the semicircular seat can be sealed, so as to avoid air leakage in the blow molding process and pitting in the finished product, so as to improve the quality of the finished product; and when the pressure on the movable rod 1 disappears, the spring 1 can push the movable rod 1 to recover, and at the same time the piston 4 can draw the gas in the gas sealing ring into the cylinder, so as to facilitate the retraction and release of the gas sealing ring.

[0025] 2. By setting up a cutting mechanism, after the plastic is injected into the rough blank forming bin, the movable plate is subjected to pressure and can push the connecting rod 2 to move. When the terminal head 1 at the bottom end of the connecting rod 2 is connected to the terminal seat 1, the air pump 2 can be energized, so that the cutting mechanism can start working. The air pump 2 can introduce gas to move the piston 3, and further push the push rod 2 to make the cutting plate cut the plastic, and block the bottom end of the rough blank forming bin through the cutting plate, so as to prevent the plastic from continuing to be injected, and the rough blank can be cut neatly. At the same time, it can prevent the plastic from sticking to the rough blank and avoid the generation of residual material. When the air pump 2 is powered off, the spring 4 is restored to push the piston 3 back to its original position, so that the cutting plate can be restored, which is convenient for continuing to manufacture the rough blank.

[0026] 3. By setting a limit mechanism, when the electric telescopic rod 2 is powered on, the electromagnet connected in series with the electric telescopic rod 2 is powered on at the same time, so the electromagnet can absorb the iron block, and the limit pin can be retracted into the limit column. At the same time, the spring five is in a compressed state. When the two sets of outer molds are fitted to each other, the electric telescopic rod 2 is powered off, and the limit column can be inserted into the limit hole, and the electromagnet begins to be powered off, so the spring five can push the limit pin out, so that the limit column is fixed in the limit hole, so that the two outer molds can be closely connected, which can prevent the two sets of outer molds from being pushed apart due to the high pressure during the blow molding process, resulting in reduced product quality, and is conducive to product molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 is a cross-sectional view of the present invention;

[0029] Figure 3 It is a partial cross-sectional view of the present invention;

[0030] Figure 4 It is an enlarged view of C in the present invention;

[0031] Figure 5 It is a schematic diagram of the partial structure of the blow molding nozzle body of the present invention;

[0032] Figure 6 It is an enlarged view of B in the present invention;

[0033] Figure 7 It is an enlarged view of A in the present invention;

[0034] Figure 8 It is a schematic diagram of the molding die structure of the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of the limiting mechanism of the present invention.

[0036] In the figure: 1. workbench; 2. inclined slide; 3. heating box; 4. motor 1; 5. hopper; 6. valve 1; 7. support platform; 8. molding mold; 9. conveyor belt; 10. motor 2; 11. base; 12. plastic extruder; 13. connecting pipe; 14. cylinder; 15. electric slide 1; 16. stirring shaft; 17. infrared heater; 18. heating chamber; 19. driver 1; 20. electric telescopic rod 1; 21. connecting seat; 22. electric slide 2; 23. semicircular card seat; 24. discharge pipe; 25. rough blank molding chamber; 26. blow molding nozzle body; 27. spring 1; 28. movable rod 1; 29. ​​connecting rod 1; 30. auxiliary mechanism; 31. gas sealing ring; 32. piston 1; 33. air pump 1; 34. Support rod one; 35. Spring two; 36. Push rod one; 37. Piston two; 38. Pressure detection mechanism; 39. Movable plate; 40. Connecting rod two; 41. Terminal head one; 42. Terminal seat one; 43. Spring three; 44. Support rod two; 45. Air pump two; 46. Piston three; 47. Push rod two; 48. Spring four; 49. Cutting mechanism; 50. Cutting plate; 51. Outer mold; 52. Opening; 53. Inner mold; 54. Limiting hole; 55. Bottom plate; 56. Limiting column; 57. Electric telescopic rod two; 58. Limiting plate; 59. Limiting pin; 60. Iron block; 61. Spring five; 62. Limiting mechanism; 63. Terminal seat two; 64. Terminal head two; 65. Insert block; 66. Piston four; 67. Movable rod two; 68. Electromagnet. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figures 1 to 9 The present invention provides a blow molding nozzle and a blow molding machine, and the technical solution is as follows:

[0041] A blow molding nozzle and a blow molding machine, including a blow molding nozzle body 26, a blow molding port is provided at the center of the blow molding nozzle body 26, and the blow molding port is connected to an external air pipe, a one-way valve is provided at the bottom end of the blow molding port to prevent plastic from entering, a gas sealing ring 31 is wound around the side wall of the top end of the blow molding nozzle body 26, and auxiliary mechanisms 30 for filling the gas sealing ring 31 are provided on both sides of the top end of the blow molding nozzle body 26.

[0042] During use, the blow molding port is inflated through an external air pipe for blow molding. The one-way valve in the blow molding port allows gas to be blown, while preventing plastic from entering the blow molding port during the rough embryo production process and preventing the blow molding port from being blocked, which is beneficial to the blow molding of the rough embryo.

[0043] As an embodiment of the present invention, refer to Figure 5-6The auxiliary mechanism 30 includes a connecting rod 29, and the connecting rod 29 is movably installed in the blow molding nozzle body 26 through a rotating shaft. The top of the connecting rod 29 is movably connected to a movable rod 28, and the bottom of the connecting rod 29 is movably connected to a movable rod 2 67, and the movable rod 28 and the movable rod 2 67 are parallel to each other. A spring 27 is arranged between the connecting rod 29 and the blow molding nozzle body 26, and a cylinder 14 is arranged on the outside of the movable rod 2 67, and the cylinder 14 is connected to the gas sealing ring 31. A piston 4 66 is movably installed in the cylinder 14, and one end of the piston 4 66 extends to the outside of the cylinder 14 and is fixedly connected to the movable rod 2 67.

[0044] When the movable rod 28 is squeezed, the spring 27 is in a compressed state, and the connecting rod 29 connected to the movable rod 28 can rotate in the blow molding nozzle body 26 through the rotating shaft, thereby driving the movable rod 2 67 to push the piston 4 66 to inject the gas in the cylinder 14 into the gas sealing ring 31, thereby expanding the gas sealing ring 31 and sealing the connection between the blow molding nozzle body 26 and the semicircular seat 23, thereby avoiding air leakage during the blow molding process and pitting on the finished product, thereby improving the quality of the finished product, and when the pressure on the movable rod 28 disappears, the spring 27 can push the movable rod 28 to recover, and at the same time, the piston 4 66 can draw the gas in the gas sealing ring 31 into the cylinder 14, so as to facilitate the retraction and release of the gas sealing ring 31.

[0045] A blow molding machine, comprising a workbench 1, a heating box 3, a support table 7, a hopper 5, a valve 6, a heating bin 18, an infrared heater 17, a stirring shaft 16 and a motor 4, a plastic extruder 12 is arranged inside the workbench 1, a connecting pipe 13 is arranged between the plastic extruder 12 and the heating bin 18, a valve 2 is arranged at the top of the connecting pipe 13, one end of the plastic extruder 12 is fixedly connected to a discharge pipe 24, a side of the discharge pipe 24 is provided with a base 11, an electric slide rail 15 is arranged on the top wall of the workbench 1, a driver 19 is movably installed on the electric slide rail 15, the bottom end of the driver 19 is symmetrically fixedly connected to two electric telescopic rods 20 electrically connected to a power source, and the bottom ends of the two electric telescopic rods 20 are fixedly connected together A connecting seat 21 is connected, a rough blank molding bin 25 is provided at the upper end of the base 11, and a discharge pipe 24 extends into the base 11 and is connected to the rough blank molding bin 25, a cutting mechanism 49 is provided on the bottom side of the rough blank molding bin 25, a blow molding nozzle body 26 of any one of the above claims 1-2 is movably inserted in the rough blank molding bin 25, and the blow molding nozzle body 26 is fixedly connected to the center of the bottom end of the connecting seat 21, a molding mold 8 for rough blank blow molding is provided on the side of the base 11 away from the plastic extruder 12, a conveyor belt 9 for conveying finished products is provided on the bottom side of the molding mold 8, a motor 10 for driving the conveyor belt 9 is provided on one side of the conveyor belt 9, and an inclined slide 2 for conveying the finished product to the outside of the workbench 1 is provided on the side of the conveyor belt 9 away from the base 11.

[0046] First, pour the plastic granules into the upper hopper 5, open the valve 16 to allow the plastic granules to enter the heating bin 18 in the heating box 3, and heat them up through the infrared heater 17. During the heating process, the motor 4 drives the stirring shaft 16 to stir the plastic granules, so that the plastic granules can be heated evenly, melted faster, and work efficiency can be improved. Next, open the valve 2 to guide the melted plastic into the plastic extruder 12 through the connecting pipe 13, and use the driver 2 to make the two sets of semicircular holders 23 fit with the blow molding nozzle body 26, and then drive The actuator 19 moves the blow molding nozzle body 26 to the top of the base 11, and further inserts the blow molding nozzle body 26 into the rough blank molding bin 25 through the electric telescopic rod 20, and then injects plastic into the rough blank molding bin 25 to make a rough blank. After the rough blank is made, the rough blank is moved to the molding mold 8 through the driver 19 and the electric telescopic rod 20 for blow molding. After molding, the finished product is transported to the inclined slide 2 through the conveyor belt 9, and further transported to the outside of the workbench 1 for collection, which can save labor and further reduce production costs.

[0047] As an embodiment of the present invention, refer to Figure 4The cutting mechanism 49 includes a support rod 2 44, an air pump 2 45 is arranged inside the support rod 2 44, a piston 3 46 is arranged on one side of the air pump 2 45, and the end of the piston 3 46 away from the air pump 2 45 is fixedly connected to a push rod 2 47, one end of the push rod 2 47 extends to the outside of the support rod 2 44 and is fixedly connected to a cutting plate 50, and the cutting plate 50 is in contact with the bottom wall of the rough blank forming bin 25, a spring 48 is wound around the outside of the push rod 2 47, and the spring 48 is located between the piston 3 46 and the inner wall of the support rod 2 44, and a pressure detection mechanism 38 is arranged on one side wall of the rough blank forming bin 25.

[0048] When the air pump 2 45 is powered on, gas can be introduced to move the piston 3 46, which can further push the push rod 2 47 to make the cutting plate 50 cut the plastic, and the bottom end of the rough blank forming bin 25 is blocked by the cutting plate 50, which can prevent the plastic from continuing to be injected, and can make the rough blanks cut neatly. At the same time, it can prevent the plastic from sticking to the rough blanks and avoid the generation of residual materials. When the air pump 2 45 is powered off, the spring 48 is restored to push the piston 3 46 back to its original position, so that the cutting plate 50 can be restored, which is convenient for continuing to manufacture the rough blanks.

[0049] As an embodiment of the present invention, refer to Figure 4 The pressure detection mechanism 38 includes a connecting rod 2 40, one end of which is fixedly connected to a movable plate 39, and the movable plate 39 is tightly fitted with the rough blank forming bin 25, and the other end of the connecting rod 2 40 is fixedly connected to a terminal head 1 41, one side of the terminal head 1 41 is provided with a terminal seat 1 42 that matches the terminal head 1 41, and the terminal seat 1 42 is electrically connected to the air pump 2 45, and a spring 3 43 is wound around the outer side of the connecting rod 2 40, and the spring 3 43 is located between the movable plate 39 and the side wall of the base 11.

[0050] When plastic is injected into the rough blank forming chamber 25, the movable plate 39 is subjected to pressure to push the connecting rod 2 40 to move. When the terminal head 1 41 at the bottom end of the connecting rod 2 40 is connected to the terminal seat 1 42, the air pump 2 45 can be energized, so that the cutting mechanism 49 can start working, and the remaining material can be cut while the rough blank is being made, which is convenient for control. When the rough blank is taken out, the spring 3 43 can push the movable plate 39 to move to its original position, which is convenient for continued detection.

[0051] As an embodiment of the present invention, refer to Figure 3 , 6-7, two electric slide rails 22 are symmetrically arranged at the bottom end of the connecting seat 21, and semicircular card seats 23 are slidably installed on the two electric slide rails 22, and drivers 2 that match the electric slide rails 22 are arranged on the top walls of the two semicircular card seats 23, and plug blocks 65 of the start auxiliary mechanism 30 are arranged on the inner sides of the two semicircular card seats 23, and wiring seats 2 63 are arranged in the bottom walls of the two semicircular card seats 23. Two wiring seats 63 that match the wiring seats 2 are symmetrically arranged on the top wall of the base 11. The plastic extruder 12 includes a piston 37, a support rod 34 for pushing the piston 37 is arranged on one side of the piston 37, an air pump 33 is arranged in the support rod 34, a piston 32 is arranged on one side of the air pump 33, a push rod 36 is arranged at one end of the piston 32, and the push rod 36 is fixedly connected to the piston 37, a spring 35 is arranged on the outer side of the push rod 36, and the spring 35 is located between the piston 32 and the inner wall of the support rod 34.

[0052] When the semicircular holder 23 contacts the blow molding nozzle body 26, the plug block 65 can be inserted into the blow molding nozzle body 26 to squeeze the movable rod 28, so that the auxiliary mechanism 30 starts to work. At the same time, when the terminal block 23 at the bottom end of the semicircular holder 23 is connected to the terminal head 24 on the base 11, the circuit of the air pump 33 can be connected, so that the air pump 33 discharges gas to squeeze the piston 32, pushing the push rod 36 and the piston 2 37 to move inward, thereby injecting the plastic from the discharge pipe 24 into the rough blank molding bin 25. When the rough blank moves into the molding mold 8, the terminal block 263 is separated from the terminal head 264, so that the air pump 33 is powered off, and the spring 2 35 pushes the piston 32 to the initial position, which is convenient for continuing to inject plastic.

[0053] As an embodiment of the present invention, refer to Figure 8 The molding die 8 includes two symmetrically arranged outer molds 51, and the outer side walls of the two outer molds 51 are fixedly connected with electric telescopic rods 57 for moving the outer molds 51. The tops of the two outer molds 51 are provided with openings 52 that match the semicircular holder 23. The two outer molds 51 are provided with inner molds 53 for blow molding. The bottom ends of the two inner molds 53 are movably provided with a bottom plate 55. Four limiting holes 54 are symmetrically provided on the inner wall of one of the outer molds 51, and four limiting columns 56 that match the four limiting holes 54 are provided on the inner wall of the other outer mold 51. The four limiting columns 56 are provided with limiting mechanisms 62.

[0054] When the blow molding nozzle body 26 and the semicircular holder 23 move between the two sets of outer molds 51, the electric telescopic rod 257 works to close the two sets of outer molds 51. At the same time, the semicircular holder 23 fits the opening 52, and the bottom plate 55 between the inner molds 53 can play a supporting role during the blow molding process, which is beneficial to the molding of the rough embryo.

[0055] As an embodiment of the present invention, refer to Fig. 9 The limiting mechanism 62 includes an electromagnet 68. The electromagnet 68 and the electric telescopic rod 57 are both electrically connected to the power supply, and the electromagnet 68 and the electric telescopic rod 57 are connected in series. Iron blocks 60 are provided on both sides of the electromagnet 68. The ends of the two iron blocks 60 away from the electromagnet 68 are fixedly connected to the limiting pins 59. The outer sides of the limiting pins 59 are fixedly connected to the limiting plates 58. Springs 61 are provided between the limiting plates 58 and the electromagnet 68.

[0056] When the electric telescopic rod 2 57 is powered on, the electromagnet 68 connected in series with the electric telescopic rod 2 57 is powered on at the same time, so the electromagnet 68 can absorb the iron block 60, and can make the limit pin 59 shrink into the limit column 56, and the spring 5 61 is in a compressed state. When the two groups of outer molds 51 are in contact with each other, the electric telescopic rod 2 57 is powered off, and the limit column 56 can be inserted into the limit hole 54, and the electromagnet 68 begins to be powered off, so the spring 5 61 can push the limit pin 59 out, so that the limit column 56 is fixed in the limit hole 54, so that the two outer molds 51 can be tightly connected, and the two groups of outer molds 51 can be prevented from being pushed apart due to the high pressure during the blow molding process, resulting in reduced product quality, which is beneficial to the molding of the product.

[0057] Working principle: First, pour the plastic particles into the upper hopper 5, open the valve 6 to allow the plastic particles to enter the heating chamber 18 in the heating box 3, and heat them through the infrared heater 17. During the heating process, the motor 4 drives the stirring shaft 16 to stir the plastic particles, which can make the plastic particles heated evenly, accelerate melting, and improve work efficiency. Then, open the valve 2 to guide the melted plastic into the plastic extruder 12 through the connecting pipe 13, and use the driver 2 to make the two groups of semicircular holders 23 fit with the blow molding nozzle body 26. When the semicircular holder 23 contacts the blow molding nozzle body 26, the plug 65 can be inserted into the blow molding nozzle body 26 to squeeze the movable rod 28. When the movable rod 28 is squeezed, the spring 27 is in a compression state. The movable rod 28 is in a contracted state, and the connecting rod 29 connected to the movable rod 28 can rotate in the blowing nozzle body 26 through the rotating shaft, so that the movable rod 2 67 can be driven to push the piston 4 66 to inject the gas in the cylinder 14 into the gas sealing ring 31, so that the gas sealing ring 31 can be expanded, and the connection between the blowing nozzle body 26 and the semicircular holder 23 can be sealed, so that air leakage can be avoided during the blow molding process, pitting can be avoided on the finished product, and the quality of the finished product can be improved. When the terminal seat 2 63 at the bottom end of the semicircular holder 23 is connected to the terminal head 2 64 on the base 11, the circuit of the air pump 33 can be connected, so that the air pump 33 discharges gas to squeeze the piston 32, and pushes the push rod 36 and the piston 2 37 to move inward, so as to prevent the air from leaking and pitting on the finished product. The plastic is injected into the rough blank molding bin 25 from the discharge pipe 24. After the plastic is injected into the rough blank molding bin 25, the movable plate 39 is subjected to pressure to push the connecting rod 2 40 to move. When the terminal head 1 41 at the bottom end of the connecting rod 2 40 is connected to the terminal seat 1 42, the air pump 2 45 can be energized, so that the cutting mechanism 49 can start working. The air pump 2 45 can introduce gas to move the piston 3 46, and further push the push rod 2 47 to make the cutting plate 50 cut the plastic, and the bottom end of the rough blank molding bin 25 is blocked by the cutting plate 50, so as to prevent the plastic from continuing to be injected, so that the rough blank can be cut neatly, and at the same time, the plastic and the rough blank can be prevented from sticking to each other, and the generation of residual material can be avoided. When the rough blank is taken out, the spring 3 43 can push the movable plate 39 to move to The original position is convenient for continued detection, and the terminal head 41 is separated from the terminal seat 42. At this time, the air pump 2 45 is in a power-off state, and the spring 48 is restored to push the piston 3 46 back to the original position, so that the cutting plate 50 can be restored, which is convenient for continuing to make the rough blank. After the rough blank is made, the driver 19 and the electric telescopic rod 20 move the rough blank into the molding mold 8 for blow molding. When the blow molding nozzle body 26 and the semicircular holder 23 move between the two groups of outer molds 51, the electric telescopic rod 2 57 works to close the two groups of outer molds 51. At the same time, the semicircular holder 23 fits the opening 52, and the bottom plate 55 between the inner molds 53 can play a supporting role in the blow molding process, which is beneficial to the molding of the rough blank. When the electric telescopic rod 2 57 is powered on,The electromagnet 68 connected in series with the electric telescopic rod 2 57 is energized at the same time, so the electromagnet 68 can absorb the iron block 60, and the limit pin 59 can be retracted into the limit column 56. At the same time, the spring 5 61 is in a compressed state. When the two sets of outer molds 51 are fitted to each other, the limit column 56 can be inserted into the limit hole 54, so that the electric telescopic rod 2 57 is powered off, and the electromagnet 68 begins to be powered off. Therefore, the spring 5 61 can push the limit pin 59 out, so that the limit column 56 is fixed in the limit hole 54, so that the two outer molds 51 can be tightly connected, and the two sets of outer molds 51 can be prevented from being pushed apart due to the high pressure during the blow molding process, resulting in reduced product quality, which is beneficial. For the molding of the product, after molding, the electric telescopic rod 2 57 is energized, and then the two sets of outer molds 51 are separated, and then the semicircular holder 23 is separated from the blow molding nozzle body 26, so that the finished product falls, and the finished product is transported to the inclined slide 2 by the conveyor belt 9, and further transported to the outside of the workbench 1 for collection, which can save labor and further reduce production costs. When the semicircular holder 23 is separated from the blow molding nozzle body 26, the pressure on the movable rod 1 28 disappears, and the spring 1 27 can push the movable rod 1 28 to recover. At the same time, the piston 4 66 can draw the gas in the gas sealing ring 31 into the cylinder 14, which is convenient for the retraction and release of the gas sealing ring 31.

[0058] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blow molding nozzle, comprising a blow molding nozzle body (26), characterized in that: A blow molding port is provided at the center of the blow molding nozzle body (26), and the blow molding port is connected to an external air pipe, a one-way valve is provided at the bottom end of the blow molding port to prevent plastic from entering, a gas sealing ring (31) is wound around the side wall of the top end of the blow molding nozzle body (26), and auxiliary mechanisms (30) for filling the gas sealing ring (31) are provided on both sides of the top end of the blow molding nozzle body (26); The auxiliary mechanism (30) comprises a connecting rod (29), and the connecting rod (29) is movably installed in the blow molding nozzle body (26) through a rotating shaft, the top end of the connecting rod (29) is movably connected to a movable rod (28), the bottom end of the connecting rod (29) is movably connected to a movable rod (67), and the movable rod (28) and the movable rod (67) are parallel to each other, a spring (27) is arranged between the connecting rod (29) and the blow molding nozzle body (26), a cylinder (14) is arranged on the outside of the movable rod (67), and the cylinder (14) is connected to the gas sealing ring (31), a piston (66) is movably installed in the cylinder (14), and one end of the piston (66) extends to the outside of the cylinder (14) and is fixedly connected to the movable rod (67); A plastic extruder (12) is arranged inside the workbench (1), a connecting pipe (13) is arranged between the plastic extruder (12) and the heating bin (18), a valve (2) is arranged at the top end of the connecting pipe (13), one end of the plastic extruder (12) is fixedly connected to a discharge pipe (24), one side of the discharge pipe (24) is arranged with a base (11), an electric slide rail (15) is arranged on the top wall inside the workbench (1), a driver (19) is movably mounted on the electric slide rail (15), the bottom end of the driver (19) is symmetrically fixedly connected to two electric telescopic rods (20) electrically connected to a power source, the bottom ends of the two electric telescopic rods (20) are commonly fixedly connected to a connecting seat (21), and the upper end of the base (11) is provided with a rough blank forming bin ( 25), and the discharge pipe (24) extends into the base (11) and is connected to the rough blank molding bin (25), the bottom side of the rough blank molding bin (25) is provided with a cutting mechanism (49), the blow molding nozzle body (26) is movably inserted in the rough blank molding bin (25), and the blow molding nozzle body (26) is fixedly connected to the center of the bottom end of the connecting seat (21), the base (11) is provided with a molding mold (8) for rough blank blow molding on the side away from the plastic extruder (12), the bottom side of the molding mold (8) is provided with a conveyor belt (9) for conveying finished products, one side of the conveyor belt (9) is provided with a motor 2 (10) for driving the conveyor belt (9), and the side of the conveyor belt (9) is provided with an inclined slideway (2) for conveying the finished products to the outside of the workbench (1) on the side away from the base (11); The cutting mechanism (49) comprises a support rod 2 (44), an air pump 2 (45) is arranged inside the support rod 2 (44), a piston 3 (46) is arranged on one side of the air pump 2 (45), one end of the piston 3 (46) away from the air pump 2 (45) is fixedly connected to a push rod 2 (47), one end of the push rod 2 (47) extends to the outside of the support rod 2 (44) and is fixedly connected to a cutting plate (50), and the cutting plate (50) is in contact with the bottom wall of the rough blank forming bin (25), a spring 4 (48) is wound around the outside of the push rod 2 (47), and the spring 4 (48) is located between the piston 3 (46) and the inner wall of the support rod 2 (44), and a pressure detection mechanism (38) is arranged on one side wall of the rough blank forming bin (25); The pressure detection mechanism (38) includes a second connecting rod (40), one end of which is fixedly connected to a movable plate (39), and the movable plate (39) is tightly fitted with the rough blank forming bin (25), the other end of which is fixedly connected to a first terminal (41), one side of which is provided with a first terminal seat (42) matched with the first terminal seat (41), and the first terminal seat (42) is electrically connected to the second air pump (45), and a third spring (43) is wound around the outer side of the second connecting rod (40), and the third spring (43) is located between the movable plate (39) and the side wall of the base (11); The bottom end of the connecting seat (21) is symmetrically provided with two electric slide rails (22), and the two electric slide rails (22) are both slidably mounted with semicircular clamping seats (23), and the top walls of the two semicircular clamping seats (23) are both provided with drivers (2) that match the electric slide rails (22), and the inner sides of the two semicircular clamping seats (23) are both provided with plug blocks (65) of the starting auxiliary mechanism (30), and the bottom walls of the two semicircular clamping seats (23) are both provided with wiring seats (63), and the top wall of the base (11) is symmetrically provided with two wiring heads (64) that match the wiring seats (63). ), the plastic extruder (12) comprises a piston 2 (37), a support rod 1 (34) for pushing the piston 2 (37) is arranged on one side of the piston 2 (37), an air pump 1 (33) is arranged inside the support rod 1 (34), a piston 1 (32) is arranged on one side of the air pump 1 (33), a push rod 1 (36) is arranged at one end of the piston 1 (32), and the push rod 1 (36) is fixedly connected to the piston 2 (37), a spring 2 (35) is arranged on the outer side of the push rod 1 (36), and the spring 2 (35) is located between the piston 1 (32) and the inner wall of the support rod 1 (34).

2. A blow molding nozzle according to claim 1, characterized in that: The molding die (8) comprises two symmetrically arranged outer molds (51), the outer side walls of the two outer molds (51) are fixedly connected with two electric telescopic rods (57) for moving the outer molds (51), the top ends of the two outer molds (51) are provided with openings (52) that match with the semicircular holder (23), the inner ends of the two outer molds (51) are provided with inner molds (53) for blow molding, the bottom ends of the two inner molds (53) are movably provided with a bottom plate (55), the inner wall of one of the outer molds (51) is symmetrically provided with four limiting holes (54), the inner wall of the other outer mold (51) is provided with four limiting posts (56) that match with the four limiting holes (54), and the four limiting posts (56) are provided with limiting mechanisms (62).

3. A blow molding nozzle according to claim 2, characterized in that: The limiting mechanism (62) comprises an electromagnet (68), the electromagnet (68) and the second electric telescopic rod (57) are both electrically connected to a power source, and the electromagnet (68) and the second electric telescopic rod (57) are connected in series with each other, iron blocks (60) are arranged on both sides of the electromagnet (68), one end of the two iron blocks (60) away from the electromagnet (68) is fixedly connected to a limiting pin (59), the outer side of the limiting pin (59) is fixedly connected to a limiting plate (58), and a spring (61) is arranged between the limiting plate (58) and the electromagnet (68).

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