Bottle cap injection molding equipment and method

Abstract

The invention discloses bottle cap injection molding equipment and method, and belongs to the field of bottle cap injection molding. Bottle cap injection molding equipment comprises an injection molding table and a hydraulic air cylinder fixed to the top of the injection molding table, a lower mold disc is fixedly connected to the surface of the injection molding table, an upper mold disc is fixedly connected to the top of the hydraulic air cylinder, a material storage box is fixedly connected to the top of the upper mold disc, and the bottle cap injection molding equipment further comprises a material stirring assembly arranged on the material storage box; a stirring shaft is pulled by a lifting plate to repeatedly ascend and descend along a square inserting rod, so that a piston effect of reciprocating sliding is formed in a square inserting groove, when suction force is generated in the square inserting groove, gas at the top of an inner cavity of a storage box is sucked into the square inserting groove, bubbles in plastic slurry quickly float upwards, and the plastic slurry is uniformly stirred. The bubble content in the plastic slurry is reduced, and the injection molding quality of the bottle cap is improved; and under the action of thrust, the water flow in the water storage tank can be fully filled into each water cooling tank, so that the uniform and effective cooling effect is realized, and the cooling effect is improved.

Description

Technical Field

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

[0002] Plastic is a very common synthetic material with advantages such as light weight, durability, waterproof, low cost and easy to shape. These characteristics make plastic widely used in many industries, and plastic is difficult to degrade, so the more plastic is used, the greater the environmental pollution is. Therefore, it is necessary to recycle waste plastics, clean them, and then hot-melt extrude them into new plastic products, so as to reuse resources and achieve green development of energy conservation and environmental protection. In the process of reproducing waste plastics, the cleaned waste plastics need to be hot-melted into plastic slurry, and then extruded by the extruder.

[0003] At present, when recycled plastics are used for injection molding of recycled bottle caps, a certain amount of bubbles will exist in the plastic slurry, and these bubbles will cause hollowing and defects in the product after injection molding, reducing the injection molding quality. In addition, during the continuous injection molding process of the existing plastic slurry, the uniformity of the internal raw material dispersion will be reduced, thereby affecting the final injection molding quality. Therefore, a bottle cap injection molding device and method are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that bubbles in the plastic slurry in the prior art will cause hollowing and defects in the product after injection molding, thereby reducing the injection molding quality; and the uniformity of raw material dispersion will be reduced during continuous injection molding, and a bottle cap injection molding device and method are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bottle cap injection molding device comprises an injection molding table and a hydraulic cylinder fixed on the top thereof, wherein a lower mold plate is fixedly connected to the surface of the injection molding table, an upper mold plate is fixedly connected to the top of the hydraulic cylinder, a material storage box is fixedly connected to the top of the upper mold plate, and further comprises: a stirring component, which is arranged on the material storage box and is used to stir the injection molding slurry; a water cooling component, which is arranged on the lower mold plate and is used to quickly cool the bottle cap after injection molding; and an ejection component, which is arranged in the injection molding table and is used to eject the produced bottle cap out of the lower mold plate.

[0007] In order to improve the injection molding quality, preferably, the stirring assembly includes a stirring shaft, the stirring shaft is rotatably connected in a storage box, the outer wall of the stirring shaft is fixedly connected with a stirring slurry, the top of the storage box is fixedly connected with a mounting bracket, the top of the mounting bracket is fixedly connected with a driving motor, the bottom end of the output shaft of the driving motor is fixedly connected with a square plug rod, the upper part of the inner cavity of the stirring shaft is provided with a square slot, and the square plug rod is slidably inserted into the square slot.

[0008] In order to improve the stirring effect, the top of the stirring shaft penetrates through the top of the storage box and is fixedly connected to two groups of clamps, a lifting plate is slidably sleeved on the outer wall of the stirring shaft between the two groups of clamps, and a reciprocating screw is rotatably connected between the bottom of the mounting frame and the top of the storage box, the reciprocating screw penetrates the lifting plate and is threadedly connected thereto, and the reciprocating screw is connected to the output shaft of the driving motor through a pulley group.

[0009] In order to improve production efficiency, preferably, six groups of injection grooves are provided on the lower mold disc at equal intervals, and the top of each group of the injection grooves is slidably connected with two groups of outer mold sleeves, and the outer walls of the two groups of outer mold sleeves are rotatably connected with sliding plates, and two-way threaded rods are threadedly connected between the sliding plates on both sides, and the two ends of the two-way threaded rods are rotatably connected to the lower mold disc through bearing seats, and the ends of the two-way threaded rods pass through the bearing seats and are fixedly connected with helical gears, and the top of the lower mold disc is rotatably connected with an helical toothed disc, and the helical toothed disc is meshingly connected with the helical gear, and the top of the lower mold disc is fixedly connected with a servo motor, and the top of the servo motor is fixedly connected with a driving toothed disc, and the outer wall of the helical toothed disc is fixedly connected with a driven toothed disc, and the driven toothed disc is meshingly connected with the driving toothed disc.

[0010] In order to facilitate quantitative discharging, preferably, six combined templates are fixed with equal intervals on the bottom of the upper mold plate, a discharge trough is provided between the center of each group of the combined templates and the inner cavity of the storage box, and a limited position rotating bin is fixedly connected between the six groups of the combined templates. A limited position turntable is rotatably connected in the limited position turntable, a material passing hole is provided on the limited position turntable, the bottom end of the stirring shaft passes through the bottom of the storage box and is fixedly connected to a cross rod, and a cross cavity sleeve is fixedly connected to the middle of the limited position turntable, and the cross rod passes through the center of the cross cavity sleeve.

[0011] In order to improve the cooling effect, preferably, the water cooling component includes a water tank, which is opened in the injection molding table, and a linkage shaft is rotatably connected in the water tank. The top end of the linkage shaft passes through the top of the lower mold plate and is aligned with the cross rod. A cross slot is opened in the linkage shaft, the outer diameter of the cross rod is the same as the inner diameter of the cross slot, and the bottom end of the cross slot is connected with the top of the inner cavity of the water tank, and a liquid stirring blade is fixedly connected to the outer wall of the linkage shaft located in the water tank. A water cooling tank is opened in the outer mold sleeve, and a guide pipe is fixedly connected to one of the side walls of the two groups of outer mold sleeves at the same injection molding tank, and the other end of the guide pipe is inserted into the other group of half outer mold sleeves. A liquid supply pipe is fixed and connected to the side wall of the water cooling tank, and the other end of the liquid supply pipe is connected to the bottom of the inner cavity of the water tank.

[0012] In order to improve the injection molding quality, further, both sides of the stirring shaft are fixedly connected with an air suction pipe, the air suction pipe is connected with the bottom of the inner cavity of the square slot, the inner cavity of the stirring shaft is provided with an exhaust groove, the output end of the exhaust groove passes through the bottom end of the cross rod, the input end of the exhaust groove is connected with the inner cavity of the air suction pipe, and the air suction pipe and the inner cavity of the exhaust groove are both provided with a one-way valve.

[0013] In order to improve the energy-saving effect, preferably, a steam groove is provided on the top of the outer mold sleeve, a guide chute is provided in the composite mold plate, a steam pipe is fixedly connected in the guide chute, the steam pipe is aligned with the steam groove up and down, and the outer diameter of the steam pipe is the same as the inner diameter of the steam groove, a condensation tray is fixedly connected between the six groups of composite mold plates, the guide chute is connected to the inner cavity of the condensation tray, a return pipe is fixed on and connected to the condensation tray, the return pipe is connected to the top of the inner cavity of the water storage tank, and a one-way valve is arranged in the return pipe.

[0014] To facilitate demolding and unloading, preferably, the ejection mechanism includes a first lifting ring, a first cylinder is fixedly connected to the top of the inner cavity of the injection molding table, the top of the first lifting ring is fixed to the bottom of the telescopic end of the first cylinder, six groups of lifting columns are fixed at equal intervals on the top of the first lifting ring, the top of the lifting column passes through the injection molding groove and is fixedly connected to a side push ring, the top of the side push ring is fixedly connected to the lower mold, a second lifting ring is slidably sleeved between the six groups of lifting columns, the first lifting ring is fixedly connected to the second cylinder, the top of the telescopic end of the second cylinder is fixedly connected to the bottom of the second lifting ring, the top of the second lifting ring is located on both sides of each group of lifting columns and is fixedly connected to a push rod, the top of the push rod passes through the side push ring and the lower mold in sequence.

[0015] A bottle cap injection molding method, the steps are as follows:

[0016] Step 1: before injection molding, the mold is closed to form a bottle cap injection molding cavity;

[0017] Step 2: injecting a uniformly stirred quantitative slurry into the injection molding cavity;

[0018] Step 3, cooling the slurry in the injection molding cavity;

[0019] Step 4: After cooling, demould and eject the formed bottle cap.

[0020] Compared with the prior art, the present invention provides a bottle cap injection molding device and method, which has the following beneficial effects:

[0021] 1. The bottle cap injection molding equipment pulls the stirring shaft to rise and fall repeatedly along the square plug rod through the lifting plate, so that a reciprocating piston action will be formed in the square slot. When suction is generated in the square slot, the gas at the top of the inner cavity of the storage box will be sucked into the square slot, so that the bubbles in the plastic slurry will float up quickly, reducing the bubble content in the plastic slurry and improving the injection molding quality of the bottle cap; and the thrust will fill this part of the gas into the water storage tank, so that the water flow in the water storage tank fills each water cooling tank, and after cooling, it will flow back to the water storage tank for mixing, achieving uniform and effective cooling and improving the cooling effect.

[0022] 2. The bottle cap injection molding equipment, through the plug-in limit of the square plug rod and the square slot, can drive the stirring shaft and the stirring slurry to stir and mix the plastic slurry in the storage box after turning on the driving motor, thereby ensuring the uniformity of the raw material dispersion inside the plastic slurry and improving the injection molding quality; at the same time, with the transmission action of the pulley group, the lifting plate moves up and down along the reciprocating screw rod, so that the height of the stirring slurry is constantly changed, making the stirring effect more comprehensive and further improving the stirring effect.

[0023] 3. The bottle cap injection molding equipment re-cools and collects the cooling water evaporated during the cooling process through the cooperation of the steam tank, the diversion chute, the steam pipe, the condensation plate and the reflux pipe, so that it flows back into the water storage tank, realizes the recycling of the cooling water flow, and improves the energy saving effect.

[0024] 4. The bottle cap injection molding equipment realizes step-by-step demoulding through the coordinated setting of the upper mold plate, the outer mold sleeve, the lifting column, the side push ring and the ejector rod, avoids swelling and deformation during traditional demoulding, reduces the defective rate of product demoulding, and improves product quality.

[0025] 5. The bottle cap injection molding equipment, with the setting of multiple sets of outer mold sleeves and closing mold plates, realizes simultaneous production of multiple stations, effectively improves production efficiency, and utilizes the meshing relationship between the helical gear plate and the helical gear to realize the synchronous opening and closing of multiple sets of outer mold sleeves, further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the overall structure of a bottle cap injection molding device proposed by the present invention;

[0027] Figure 2 A schematic diagram of the top view of the lower mold plate of a bottle cap injection molding device proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the upper mold plate structure of a bottle cap injection molding device proposed by the present invention when viewed from above;

[0029] Figure 4 A bottle cap injection molding device proposed by the present invention Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0030] Figure 5 A schematic diagram of a half-section structure of a material storage box of a bottle cap injection molding device proposed by the present invention;

[0031] Figure 6 A bottle cap injection molding device proposed by the present invention Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0032] Figure 7 A bottle cap injection molding device proposed by the present invention Figure 5 Schematic diagram of the enlarged structure of the middle C area;

[0033] Figure 8 A schematic diagram of a half-section structure of an injection molding table of a bottle cap injection molding device proposed by the present invention;

[0034] Fig. 9 A bottle cap injection molding device proposed by the present invention Figure 8 Schematic diagram of the enlarged structure of the middle D area;

[0035] Fig.10 A bottle cap injection molding device proposed by the present invention Figure 8 Schematic diagram of the enlarged structure of area E in the middle.

[0036] In the figure: 1. Injection molding table; 2. Hydraulic cylinder; 3. Lower mold plate; 31. Injection molding slot; 4. Upper mold plate; 41. Storage box; 42. Clamping plate; 421. Lower material chute; 422. Diversion chute; 423. Steam pipe; 5. Stirring shaft; 51. Stirring slurry; 52. Mounting frame; 53. Driving motor; 531. Square plug rod; 532. Square slot; 533. Pulley group; 54. Clamping plate; 55. Lifting plate; 56. Reciprocating screw rod; 6. Outer mold sleeve; 61. Sliding plate; 62. Bidirectional threaded rod; 621. Oblique gear; 63. Oblique toothed disc; 64. Servo motor; 641. Driving Toothed disc; 65, driven toothed disc; 66, limit rotating bin; 661, limit rotating disc; 662, material passing hole; 663, cross cavity sleeve; 67, cross plug rod; 7, water storage tank; 71, linkage shaft; 711, cross slot; 72, liquid stirring blade; 73, water cooling tank; 731, guide pipe; 732, liquid supply pipe; 74, steam tank; 75, condensation plate; 751, reflux pipe; 8, suction pipe; 81, exhaust groove; 9, first lifting ring; 91, first cylinder; 92, lifting column; 921, side push ring; 93, lower mold; 94, second lifting ring; 941, second cylinder; 95, ejector rod. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Embodiment 1:

[0040] Reference Figure 1-Figure 10 A bottle cap injection molding equipment comprises an injection molding table 1 and a hydraulic cylinder 2 fixed on the top thereof, a lower mold plate 3 is fixedly connected to the surface of the injection molding table 1, an upper mold plate 4 is fixedly connected to the top of the hydraulic cylinder 2, a storage box 41 is fixedly connected to the top of the upper mold plate 4, and further comprises: a stirring component, which is arranged on the storage box 41, and is used to stir the injection molding slurry; a water cooling component, which is arranged on the lower mold plate 3, and is used to quickly cool the bottle cap after injection molding; and an ejection component, which is arranged in the injection molding table 1, and is used to eject the produced bottle cap from the lower mold plate 3.

[0041] Reference Figure 1 , Figure 2 and Figure 8 Among them, six groups of injection grooves 31 are evenly spaced on the lower mold plate 3, and two groups of outer mold sleeves 6 are slidably connected to the top of each group of injection grooves 31. The outer walls of the two groups of outer mold sleeves 6 are rotatably connected with sliding plates 61. A two-way threaded rod 62 is threadedly connected between the sliding plates 61 on both sides. Both ends of the two-way threaded rod 62 are rotatably connected to the lower mold plate 3 through a bearing seat. The end of the two-way threaded rod 62 passes through the bearing seat and is fixedly connected with a bevel gear 621. The top of the lower mold plate 3 is rotatably connected with an bevel gear plate 63, and the bevel gear plate 63 is meshed with the bevel gear 621. The top of the lower mold plate 3 is fixedly connected with a servo motor 64, and the servo A driving gear disc 641 is fixedly connected to the top of the motor 64, and a driven gear disc 65 is fixedly connected to the outer wall of the oblique gear disc 63, and the driven gear disc 65 is meshingly connected to the driving gear disc 641; six combination templates 42 are fixed at equal intervals on the bottom of the upper mold plate 4, and a feed chute 421 is provided between the center of each combination template 42 and the inner cavity of the storage box 41, and a limited position rotating bin 66 is fixedly connected between the six combination templates 42, and a limited position turntable 661 is rotatably connected in the limit rotating bin 66, and a material passing hole 662 is provided on the limit turntable 661, and the bottom end of the stirring shaft 5 passes through the bottom of the storage box 41 and is fixedly connected to a cross rod 67.

[0042] Through the arrangement of the above structure, the servo motor 64 is turned on, and the meshing relationship between the driven toothed disc 65 and the driving toothed disc 641 is utilized to drive the oblique toothed disc 63 to rotate, and then the meshing connection between the oblique toothed disc 63 and the oblique gear 621 is utilized to drive each group of oblique gears 621 and the bidirectional threaded rod 62 to rotate at the same time. At this time, the sliding plates 61 on both sides will move along the bidirectional threaded rod 62 in the film closing direction, and finally the outer mold sleeves 6 on both sides will be tightly fitted together; then the hydraulic cylinder 2 is turned on to make it move downward with the upper mold plate 4, which finally makes the closing mold plate 42 tightly fit on the top of the outer mold sleeve 6, In this way, a bottle cap injection molding cavity is formed; then the driving motor 53 is turned on to drive the stirring shaft 5 and the limiting turntable 661 to rotate, so that the material through hole 662 is connected to the discharge trough 421 in the closing mold plate 42. At this time, the plastic slurry in the storage box 41 will fall into the injection molding cavity along the closing mold plate 42. After the plastic slurry enters the injection molding cavity, the stirring shaft 5 will drive the limiting turntable 661 to continue to rotate, so that the material through hole 662 and the discharge trough 421 are disconnected. At this time, the plastic slurry also fills the injection molding cavity, so that six groups of injection molding grooves 31 can be injected at the same time, which effectively improves the injection molding efficiency.

[0043] In addition, the falling amount of the plastic slurry and the rotation speed of the limit turntable 661 are controlled by the existing PLC technology to ensure that the falling amount each time is the same and just fills the injection cavity.

[0044] In addition, a cross cavity sleeve 663 is fixedly connected to the middle of the limiting turntable 661, and the cross rod 67 passes through the center of the cross cavity sleeve 663, so that the cross rod 67 can drive the cross cavity sleeve 663 to rotate while sliding up and down along the inner cavity of the cross cavity sleeve 663.

[0045] Reference Figure 1 , Figure 5 and Figure 6 The stirring assembly includes a stirring shaft 5, which is rotatably connected to the storage box 41, and a stirring slurry 51 is fixedly connected to the outer wall of the stirring shaft 5, a mounting frame 52 is fixedly connected to the top of the storage box 41, and a driving motor 53 is fixedly connected to the top of the mounting frame 52, and a square plug rod 531 is fixedly connected to the bottom end of the output shaft of the driving motor 53, and a square slot 532 is opened at the upper part of the inner cavity of the stirring shaft 5, and the square plug rod 531 is slidably inserted into the square slot 532; the top of the stirring shaft 5 passes through the top of the storage box 41 and is fixedly connected with two groups of clamping plates 54, and a lifting plate 55 is slidably sleeved on the outer wall of the stirring shaft 5 located between the two groups of clamping plates 54, and a reciprocating screw rod 56 is rotatably connected between the bottom of the mounting frame 52 and the top of the storage box 41, and the reciprocating screw rod 56 passes through the lifting plate 55 and is threadedly connected thereto, and the reciprocating screw rod 56 and the output shaft of the driving motor 53 are connected by a pulley group 533.

[0046] Through the arrangement of the above structure, when the stirring shaft 5 rotates, the stirring slurry 51 will stir and mix the plastic slurry in the storage box 41, thereby ensuring the uniformity of the raw material dispersion inside the plastic slurry and improving the injection molding quality; at the same time, utilizing the transmission effect of the pulley group 533, when the driving motor 53 rotates, the reciprocating screw rod 56 will be driven to rotate synchronously, so that the lifting plate 55 moves up and down along the reciprocating screw rod 56, thereby pushing the clamping plate 54 to move up and down with the stirring shaft 5 along the square plug rod 531, so that the height of the stirring slurry 51 is constantly changing, making the stirring effect more comprehensive, and further improving the stirring effect.

[0047] Reference Figure 2 , Figure 5 , Figure 6-Figure 10, wherein the water cooling assembly includes a water storage tank 7, the water storage tank 7 is provided in the injection molding table 1, a linkage shaft 71 is rotatably connected in the water storage tank 7, the top end of the linkage shaft 71 passes through the top of the lower mold plate 3 and is aligned with the cross insertion rod 67, a cross slot 711 is provided in the linkage shaft 71, the outer diameter of the cross insertion rod 67 is the same as the inner diameter of the cross slot 711, and the bottom end of the cross slot 711 is connected to the top of the inner cavity of the water storage tank 7, a liquid stirring blade 72 is fixedly connected to the outer wall of the linkage shaft 71 in the water storage tank 7, a water cooling tank 73 is provided in the outer mold sleeve 6, and one of the two groups of outer mold sleeves 6 at the same injection molding tank 31 is provided. A guide pipe 731 is fixedly connected to the side wall, and the other end of the guide pipe 731 is inserted into another group of half outer mold sleeves 6. A liquid supply pipe 732 is fixed and connected to the side wall of the water-cooling tank 73, and the other end of the liquid supply pipe 732 is connected to the bottom of the inner cavity of the water storage tank 7; an air suction pipe 8 is fixedly connected to both sides of the stirring shaft 5, and the air suction pipe 8 is connected to the bottom of the inner cavity of the square slot 532. An exhaust groove 81 is opened in the inner cavity of the stirring shaft 5, and the output end of the exhaust groove 81 passes through the bottom end of the cross rod 67, and the input end of the exhaust groove 81 is connected to the inner cavity of the air suction pipe 8, and the inner cavities of the air suction pipe 8 and the exhaust groove 81 are both provided with a one-way valve.

[0048] It should be noted that the one-way valve in the air intake pipe 8 can only allow the airflow in the storage box 41 to be sucked into the square slot 532 ; the one-way valve in the exhaust slot 81 can only allow the airflow in the square slot 532 to be discharged along the exhaust slot 81 .

[0049] When the stirring shaft 5 moves upward along the square plug rod 531, suction will be generated in the square slot 532, thereby opening the one-way valve in the air intake pipe 8, so that the airflow at the top of the inner cavity of the storage box 41 is sucked into the square slot 532, thereby reducing the air pressure at the top of the inner cavity of the storage box 41, and accompanied by the stirring effect, the bubbles in the plastic slurry will float up quickly, reducing the bubble content in the plastic slurry, reducing the presence of bubbles and voids in the bottle cap during injection molding, and effectively improving the injection molding quality of the bottle cap; and when the stirring shaft 5 moves downward along the square plug rod 531, the gas sucked in the square slot 532 will be squeezed, thereby opening the one-way valve in the exhaust groove 81, so that the square plug rod 531 can be opened. The gas in the groove 532 enters the water storage tank 7 along the exhaust groove 81 and the cross slot 711, and when the cross rod 67 moves downward along the cross slot 711, the gas in the cross slot 711 will also be pressed into the water storage tank 7, thereby continuously increasing the air pressure in the water storage tank 7, so that the water flow in the water storage tank 7 is pressed into the water cooling tank 73 along the liquid supply pipe 732, so that the cooling water flow fills the entire outer mold sleeve 6, effectively accelerating the cooling efficiency of the bottle cap after injection molding; and through the setting of the stirring shaft 5 in conjunction with the cross rod 67 and the cross slot 711, the linkage shaft 71 and the stirring blade 72 will be driven to rotate in the water storage tank 7, so that the cooling water flow in the water cooling tank 73 produces a flow effect, thereby producing a uniform cooling effect, effectively improving the cooling effect.

[0050] Reference Figure 3 , Figure 5 and Figure 7 A steam groove 74 is provided at the top of the outer mold sleeve 6, a guide chute 422 is provided in the combination mold plate 42, a steam pipe 423 is fixedly connected in the guide chute 422, the steam pipe 423 is aligned with the steam groove 74 up and down, and the outer diameter of the steam pipe 423 is the same as the inner diameter of the steam groove 74, a condensation plate 75 is fixedly connected between the six combination mold plates 42, the guide chute 422 is connected to the inner cavity of the condensation plate 75, a return pipe 751 is fixed and connected to the condensation plate 75, the return pipe 751 is connected to the top of the inner cavity of the water storage tank 7, and a one-way valve is arranged in the return pipe 751.

[0051] It should be noted that the one-way valve in the return pipe 751 can only allow the cooling water in the return pipe 751 to enter the water storage tank 7.

[0052] Through the arrangement of the above structure, after the closing mold plate 42 is fitted with the top of the outer mold sleeve 6, the steam pipe 423 will also be inserted into the steam tank 74. At this time, after the cooling water flow in the water-cooling tank 73 absorbs heat, a part of it will be evaporated, and the gas generated by evaporation will enter the guide chute 422 and the condensation plate 75 along the steam pipe 423, so that it will be cooled and condensed into liquid again, and finally enter the reflux pipe 751; and when the closing mold plate 42 is separated from the top of the outer mold sleeve 6 upward, the cross rod 67 will move upward along the cross slot 711, and finally the cross rod 67 will be separated from the cross slot 711, at this time, the gas filled in the water storage tank 7 will be discharged along the cross slot 711, so that the air pressure in the water storage tank 7 returns to normal, and the cooling water flow filled in the water-cooling tank 73 It will flow back into the water storage tank 7 again, and when the stirring blade 72 rotates for the next time, the cooling water flow returning from the water-cooling tank 73 will mix with the remaining cooling water flow in the water storage tank 7, thereby lowering the temperature of the cooling water flow returning in the water-cooling tank 73, reducing the temperature difference inside the cooling water flow, ensuring uniform and effective cooling in the subsequent water-cooling tank 73, effectively improving the cooling effect, avoiding the situation where the injection molding slurry is subjected to uneven cooling and cracks, and improving the final injection molding quality of the bottle cap; and when the air pressure in the water storage tank 7 returns to normal, the condensed water flow in the reflux pipe 751 will open the one-way valve inside it under the action of gravity, thereby flowing back into the water storage tank 7 again, realizing the recycling of the cooling water flow, and improving the energy-saving effect.

[0053] Reference Figure 8 , Fig. 9 The ejection mechanism includes a first lifting ring 9, a first cylinder 91 is fixedly connected to the top of the inner cavity of the injection molding table 1, the top of the first lifting ring 9 is fixed to the bottom of the telescopic end of the first cylinder 91, six groups of lifting columns 92 are fixed at equal intervals on the top of the first lifting ring 9, the top of the lifting column 92 passes through the injection molding groove 31 and is fixedly connected to a side push ring 921, the top of the side push ring 921 is fixedly connected to the lower mold 93, and a second lifting ring 94 is slidably sleeved between the six groups of lifting columns 92, a second cylinder 941 is fixedly connected to the first lifting ring 9, the top of the telescopic end of the second cylinder 941 is fixedly connected to the bottom of the second lifting ring 94, and the top of the second lifting ring 94 is located on both sides of each group of lifting columns 92 and is fixedly connected with a push rod 95, and the top of the push rod 95 passes through the side push ring 921 and the lower mold 93 in sequence.

[0054] Through the arrangement of the above structure, when the injection molding cooling is completed, the servo motor 64 drives the driving gear disc 641 to rotate in the reverse direction, so that the oblique gear disc 63 drives the oblique gear 621 to rotate in the reverse direction, so that the bidirectional threaded rod 62 rotates in the reverse direction, so that the sliding plates 61 on both sides drive the outer mold sleeve 6 to open to both sides, thereby realizing the side demoulding, and then the first cylinder 91 drives the first lifting ring 9 to move upward, so that the lifting column 92 pushes the side push ring 921 and the lower mold 93 upward to move, so that the bottle cap is ejected from the injection groove 31 from the inside and the side wall at the same time, and then the second cylinder 941 drives the second lifting ring 94 to move upward, so that the ejector rod 95 passes through the lower mold 93 upward, so as to eject the bottle cap, and then cooperates with the existing mechanical arm to unload, thereby utilizing the above two-step demoulding method to avoid swelling and deformation during traditional demoulding, reduce the defective rate of product demoulding, and improve product quality.

[0055] Embodiment 2:

[0056] Reference Figure 1-Figure 10 , which is basically the same as the first embodiment, on the basis of the first embodiment, a bottle cap injection molding method is proposed, and the steps are as follows:

[0057] Step 1: before injection molding, the mold is closed to form a bottle cap injection molding cavity;

[0058] Step 2: injecting a uniformly stirred quantitative slurry into the injection molding cavity;

[0059] Step 3, cooling the slurry in the injection molding cavity;

[0060] Step 4: After cooling, demould and eject the formed bottle cap.

[0061] Reference Figure 1-Figure 10 In the present invention, when in use, firstly, the cleaned and hot-melted recycled plastic slurry is injected into the storage box 41, and then the servo motor 64 is turned on, and the meshing relationship between the driven gear plate 65 and the driving gear plate 641 is utilized to drive the bevel gear plate 63 to rotate, and then the meshing connection between the bevel gear plate 63 and the bevel gear 621 is utilized to drive each group of bevel gears 621 and the bidirectional threaded rod 62 to rotate, at this time, the sliding plates 61 on both sides will move along the bidirectional threaded rod 62 toward the film closing direction, and finally the outer mold sleeves 6 on both sides will be tightly fitted together; then the hydraulic cylinder 2 is turned on to make it move downward with the upper mold plate 4, which finally makes the closing mold plate 42 tightly fit on the top of the outer mold sleeve 6, thereby forming a bottle cap injection molding cavity; and the cross rod 67 will be inserted into the cross slot 711 to form a piston structure.

[0062] Next, the driving motor 53 is turned on to drive the stirring shaft 5 and the limiting turntable 661 to rotate, so that the material through hole 662 is connected to the material discharge trough 421 in the closing mold plate 42. At this time, the plastic slurry in the storage box 41 will fall into the injection molding cavity along the closing mold plate 42. When the plastic slurry enters the injection molding cavity, the stirring shaft 5 will drive the limiting turntable 661 to continue to rotate, so that the material through hole 662 and the material discharge trough 421 are disconnected, and the plastic slurry just fills the injection molding cavity. When the stirring shaft 5 rotates, the stirring slurry 51 will The plastic slurry in the storage box 41 will be stirred and mixed, ensuring the uniformity of the raw material dispersion inside the plastic slurry and improving the injection molding quality; at the same time, utilizing the transmission effect of the pulley group 533, when the driving motor 53 rotates, the reciprocating screw 56 will be driven to rotate synchronously, so that the lifting plate 55 moves up and down along the reciprocating screw 56, thereby pushing the clamping plate 54 to move up and down along the square plug rod 531 with the stirring shaft 5, so that the height of the stirring slurry 51 is constantly changing, making the stirring effect more comprehensive, and further improving the stirring effect.

[0063] When the stirring shaft 5 moves upward along the square plug rod 531, suction will be generated in the square slot 532, thereby opening the one-way valve in the suction pipe 8, so that the airflow at the top of the inner cavity of the storage box 41 is sucked into the square slot 532, thereby reducing the air pressure at the top of the inner cavity of the storage box 41, and along with the stirring effect, the bubbles in the plastic slurry will float up quickly, reducing the bubble content in the plastic slurry, reducing the presence of bubbles and voids in the bottle cap during injection molding, and effectively improving the injection molding quality of the bottle cap; and when the stirring shaft 5 moves downward along the square plug rod 531, the gas sucked in the square slot 532 will be squeezed, thereby opening the one-way valve in the exhaust groove 81, so that the square slot 532 The gas enters the water storage tank 7 along the exhaust groove 81 and the cross slot 711, and when the cross rod 67 moves downward along the cross slot 711, the gas in the cross slot 711 will be pressed into the water storage tank 7, thereby continuously increasing the air pressure in the water storage tank 7, so that the water flow in the water storage tank 7 is pressed into the water cooling tank 73 along the liquid supply pipe 732, so that the cooling water flow fills the entire outer mold sleeve 6, effectively accelerating the cooling efficiency of the bottle cap after injection molding; and through the arrangement of the stirring shaft 5 in conjunction with the cross rod 67 and the cross slot 711, the linkage shaft 71 and the stirring blade 72 will be driven to rotate in the water storage tank 7, so that the cooling water flow in the water cooling tank 73 produces a flow effect, thereby producing a uniform cooling effect, effectively improving the cooling effect.

[0064] After the closing mold plate 42 is fitted with the top of the outer mold sleeve 6, the steam pipe 423 will also be inserted into the steam tank 74. At this time, after absorbing heat, a part of the cooling water flow in the water-cooling tank 73 will be evaporated, and the gas generated by evaporation will enter the guide chute 422 and the condensation plate 75 along the steam pipe 423, so that it will be cooled and condensed into liquid again, and finally enter the return pipe 751; and when the closing mold plate 42 is separated from the top of the outer mold sleeve 6 upward, the cross rod 67 will move upward along the cross slot 711, and finally the cross rod 67 will be separated from the cross slot 711, at this time, the gas filled in the water storage tank 7 will be discharged along the cross slot 711, so that the air pressure in the water storage tank 7 returns to normal, and the cooling water flow filled in the water-cooling tank 73 will return to normal. Flows into the water storage tank 7, and when the stirring blade 72 rotates for the next time, the cooling water flow returning from the water cooling tank 73 will be mixed with the remaining cooling water flow in the water storage tank 7, thereby reducing the temperature of the reflux cooling water flow in the water cooling tank 73, reducing the temperature difference inside the cooling water flow, ensuring uniform and effective cooling in the subsequent water cooling tank 73, effectively improving the cooling effect, avoiding the injection molding slurry from being subjected to uneven cooling and cracking, and improving the final injection molding quality of the bottle cap; and when the air pressure in the water storage tank 7 returns to normal, the condensed water flow in the reflux pipe 751 will open the one-way valve inside it under the action of gravity, so as to flow back to the water storage tank 7 again, realizing the recycling of the cooling water flow and improving the energy-saving effect.

[0065] Finally, the servo motor 64 drives the driving gear disc 641 to rotate in the reverse direction, so that the oblique gear disc 63 drives the oblique gear 621 to rotate in the reverse direction, and the bidirectional threaded rod 62 rotates in the reverse direction, so that the sliding plates 61 on both sides drive the outer mold sleeve 6 to open to both sides, thereby realizing side demoulding. Then the first cylinder 91 drives the first lifting ring 9 to move upward, so that the lifting column 92 pushes the side push ring 921 and the lower mold 93 upward to move, thereby ejecting the bottle cap from the inside and the side wall of the injection groove 31 at the same time. Then the second cylinder 941 drives the second lifting ring 94 to move upward, so that the ejector rod 95 passes through the lower mold 93 upward, thereby ejecting the bottle cap, and then cooperates with the existing robotic arm to unload the material, thereby utilizing the above-mentioned two-step demoulding method to avoid swelling and deformation during traditional demoulding, reduce the defective rate of product demoulding, and improve product quality.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bottle cap injection molding device, comprising an injection molding table (1) and a hydraulic cylinder (2) fixed on the top thereof, characterized in that: The surface of the injection molding table (1) is fixedly connected to a lower mold plate (3), the top of the hydraulic cylinder (2) is fixedly connected to an upper mold plate (4), and the top of the upper mold plate (4) is fixedly connected to a material storage box (41), and further comprises: A stirring component, the stirring component is arranged on the material storage box (41), and is used to stir the injection molding slurry; A water cooling component, the water cooling component being arranged on the lower mold plate (3), and being used for rapidly cooling the bottle cap after injection molding; An ejector assembly is arranged in the injection molding table (1), and is used to eject the produced bottle caps from the lower mold plate (3).

2. The bottle cap injection molding equipment according to claim 1, characterized in that: The stirring assembly comprises a stirring shaft (5), the stirring shaft (5) being rotatably connected in a material storage box (41), a stirring slurry (51) being fixedly connected to an outer wall of the stirring shaft (5), a mounting frame (52) being fixedly connected to the top of the material storage box (41), a driving motor (53) being fixedly connected to the top of the mounting frame (52), a square insertion rod (531) being fixedly connected to the bottom end of an output shaft of the driving motor (53), a square slot (532) being provided at the upper portion of an inner cavity of the stirring shaft (5), and the square insertion rod (531) being slidably inserted into the square slot (532).

3. The bottle cap injection molding equipment according to claim 2, characterized in that: The top of the stirring shaft (5) passes through the top of the material storage box (41) and is fixedly connected to two groups of clamping plates (54); a lifting plate (55) is slidably sleeved on the outer wall of the stirring shaft (5) located between the two groups of clamping plates (54); a reciprocating screw rod (56) is rotatably connected between the bottom of the mounting frame (52) and the top of the material storage box (41); the reciprocating screw rod (56) passes through the lifting plate (55) and is threadedly connected thereto; and the reciprocating screw rod (56) is transmission-connected to the output shaft of the driving motor (53) via a pulley group (533).

4. The bottle cap injection molding equipment according to claim 2, characterized in that: Six groups of injection grooves (31) are provided on the lower mold plate (3) at equal intervals. The top of each group of the injection grooves (31) is slidably connected to two groups of outer mold sleeves (6). The outer walls of the two groups of outer mold sleeves (6) are rotatably connected to sliding plates (61). A bidirectional threaded rod (62) is threadedly connected between the sliding plates (61) on both sides. Both ends of the bidirectional threaded rod (62) are rotatably connected to the lower mold plate (3) through a bearing seat. The ends of the bidirectional threaded rod (62) pass through the bearing seat and are fixedly connected to an inclined The top of the lower die plate (3) is rotatably connected to an oblique toothed disc (63), the oblique toothed disc (63) and the oblique gear (621) are meshingly connected, the top of the lower die plate (3) is fixedly connected to a servo motor (64), the top of the servo motor (64) is fixedly connected to a driving toothed disc (641), the outer wall of the oblique toothed disc (63) is fixedly connected to a driven toothed disc (65), the driven toothed disc (65) and the driving toothed disc (641) are meshingly connected.

5. The bottle cap injection molding equipment according to claim 4, characterized in that: Six combined mold plates (42) are fixed at equal intervals on the bottom of the upper mold plate (4), a material discharge trough (421) is provided between the center of each group of the combined mold plates (42) and the inner cavity of the material storage box (41), a limited position rotating bin (66) is fixedly connected between the six groups of the combined mold plates (42), a limited position rotating disk (661) is rotatably connected inside the limited position rotating bin (66), a material passage hole (662) is provided on the limited position rotating disk (661), the bottom end of the stirring shaft (5) passes through the bottom of the material storage box (41) and is fixedly connected to a cross rod (67), a cross cavity sleeve (663) is fixedly connected to the middle of the limited position rotating disk (661), and the cross rod (67) passes through the center of the cross cavity sleeve (663).

6. The bottle cap injection molding equipment according to claim 5, characterized in that: The water cooling component comprises a water tank (7), wherein the water tank (7) is disposed in the injection molding table (1), wherein a linkage shaft (71) is rotatably connected in the water tank (7), wherein the top end of the linkage shaft (71) passes through the top of the lower mold plate (3) and is aligned with the cross insertion rod (67), wherein a cross slot (711) is disposed in the linkage shaft (71), wherein the outer diameter of the cross insertion rod (67) is the same as the inner diameter of the cross slot (711), and the bottom end of the cross slot (711) is connected to the top of the inner cavity of the water tank (7), and is located in the water tank ( A liquid stirring blade (72) is fixedly connected to the outer wall of the linkage shaft (71) in the injection molding groove (7), a water cooling groove (73) is provided in the outer mold sleeve (6), a flow guide pipe (731) is fixedly connected to one of the side walls of the two groups of outer mold sleeves (6) at the same injection molding groove (31), the other end of the flow guide pipe (731) is plugged into the other half of the outer mold sleeve (6), a liquid supply pipe (732) is fixedly connected to the side wall of the water cooling groove (73), and the other end of the liquid supply pipe (732) is connected to the bottom of the inner cavity of the water storage tank (7).

7. The bottle cap injection molding equipment according to claim 6, characterized in that: Both sides of the stirring shaft (5) are fixedly connected with an air suction pipe (8), the air suction pipe (8) is connected to the bottom of the inner cavity of the square slot (532), the inner cavity of the stirring shaft (5) is provided with an exhaust groove (81), the output end of the exhaust groove (81) passes through the bottom end of the cross rod (67), the input end of the exhaust groove (81) is connected to the inner cavity of the air suction pipe (8), and the inner cavities of the air suction pipe (8) and the exhaust groove (81) are both provided with a one-way valve.

8. The bottle cap injection molding equipment according to claim 7, characterized in that: A steam groove (74) is provided at the top of the outer mold sleeve (6), a guide chute (422) is provided in the mold plate (42), a steam pipe (423) is fixedly connected to the guide chute (422), the steam pipe (423) is aligned with the steam groove (74) in vertical direction, and the outer diameter of the steam pipe (423) is the same as the inner diameter of the steam groove (74), a condensation pan (75) is fixedly connected between the six groups of mold plates (42), the guide chute (422) is connected to the inner cavity of the condensation pan (75), a return pipe (751) is fixedly connected to the condensation pan (75), the return pipe (751) is connected to the top of the inner cavity of the water storage tank (7), and a one-way valve is provided in the return pipe (751).

9. The bottle cap injection molding equipment according to claim 1, characterized in that: The ejection mechanism comprises a first lifting ring (9), the top of the inner cavity of the injection molding table (1) is fixedly connected to a first cylinder (91), the top of the first lifting ring (9) is fixed to the bottom of the telescopic end of the first cylinder (91), six groups of lifting columns (92) are fixed at equal intervals on the top of the first lifting ring (9), the tops of the lifting columns (92) penetrate into the injection molding groove (31) and are fixedly connected to a side push ring (921), and the top of the side push ring (921) is fixedly connected to the lower mold (9 3), a second lifting ring (94) is slidably sleeved between the six groups of lifting columns (92), a second cylinder (941) is fixedly connected to the first lifting ring (9), the top of the telescopic end of the second cylinder (941) is fixedly connected to the bottom of the second lifting ring (94), the top of the second lifting ring (94) is located on both sides of each group of lifting columns (92) and is fixedly connected to a push rod (95), the top of the push rod (95) passes through the side push ring (921) and the lower mold (93) in sequence.

10. A bottle cap injection molding method, using a bottle cap injection molding device as claimed in any one of claims 1 to 9, characterized in that: Here are the steps: Step 1: before injection molding, the mold is closed to form a bottle cap injection molding cavity; Step 2: injecting a uniformly stirred quantitative slurry into the injection molding cavity; Step 3, cooling the slurry in the injection molding cavity; Step 4: After cooling, demould and eject the formed bottle cap.

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