Bottle cap integrated injection molding equipment and injection molding method

Abstract

The present invention discloses an integrated bottle cap injection molding device and an injection molding method thereof, which relate to the field of plastic processing technology, including a docking mechanism and a nozzle mechanism, wherein the docking mechanism includes an upper loading plate, a lower loading plate, and a middle loading plate, and an upper mold shell and a lower mold shell are arranged between the lower loading plate and the middle loading plate. In the present invention, the lower cavity shell is depressed downward to form a bottle cap wall cavity, and the upper cavity shell is depressed upward to form a bottle cap plate cavity. The bottle cap wall cavity and the bottle cap plate cavity are combined to form a mold cavity of the side wall of the bottle cap. When the embedded core cavity and the lower cavity shell are buckled together, a thin layer of cavity is reserved to form a circular cavity of the cover surface of the bottle cap. After the bottle cap injected into the injection molding device is integrally molded, a circular cavity is reserved in the middle, which facilitates the subsequent addition of an inner liner with a trademark, character, or Chinese character into the cavity of the cover surface, thereby meeting the diversified customization needs of customers and saving the injection molding cost of producing multiple types of bottle caps.

Description

Technical Field

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

[0002] Bottle caps are a crucial part of food and beverage packaging, serving as the first point of contact for consumers. They maintain a tight seal around the contents, while also providing tamper-evident protection and safety. Plastic bottle caps are also made of plastic, typically molded in one piece through injection molding.

[0003] For example, the patent publication number is CN117484793A, "Rotary push plate two-color milk powder cover injection molding equipment and its control method", the rotary push plate two-color milk powder cover injection molding equipment includes: a first shell, a front mold core is arranged in the first shell, the second shell is movably arranged on the right side of the first shell, and a rear mold core is arranged in the second shell, the front mold core includes two molding stations, one molding station is arranged in the lower half of the front mold core, and the other molding station is arranged in the lower half of the front mold core, and the two molding stations are arranged in a central symmetrical manner; an ejection mechanism, the ejection mechanism is arranged in the first shell, the ejection mechanism is connected to the front mold core, and the ejection mechanism is used to eject the front mold core, the formed two-color milk powder cover and the soft glue mouth; a rotating mechanism, the rotating mechanism is arranged in the first shell, the rotating mechanism is connected to the front mold core, and the rotating mechanism is used to rotate the front mold core after the front mold core is pushed to the right, so that the positions of the two molding stations are interchanged.

[0004] In order to meet the needs of market development, in addition to the safety performance of being airtight and leak-proof, bottle caps can also be printed with trademarks, characters or Chinese characters and other logos on the surface of the bottle caps to enhance the merchant's product publicity. However, in the existing technology, the formation of the logos on the bottle cap surface is achieved by designing corresponding injection molds. As a result, when merchants need to engrave diverse logos on the bottle caps, they need to set up multiple corresponding molds to cope with it. Therefore, the existing bottle cap injection molds have a small application range. When an enterprise has diverse bottle cap production needs, the mold opening cost required by the existing injection molding equipment is extremely high. Summary of the Invention

[0005] The object of the present invention is to provide a bottle cap integrated injection molding device and an injection molding method thereof, so as to solve the problem raised in the above background technology that when an enterprise has diverse bottle cap production needs, the mold opening cost required by the existing injection molding equipment is extremely high.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bottle cap integrated injection molding device, comprising a docking mechanism and a nozzle mechanism, the docking mechanism comprising an upper loading plate, a downloading plate and a middle loading plate, an upper mold shell and a lower mold shell are arranged between the downloading plate and the middle loading plate, the inner top wall of the upper mold shell is fixedly connected to the upper cavity shell, and the inner bottom wall of the lower mold shell is fixedly connected to the lower cavity shell. The injection molding device can be divided into two parts in a split state when being installed and demolded, wherein the upper loading plate, the building block, the positioning column, the middle loading plate and the upper mold shell are combined with each other, and the lower mold shell and the downloading plate are combined with each other as the lower mold component, and the upper mold shell can be separated from the lower mold shell when demolding is performed, the annular part of the surface of the lower cavity shell is recessed downward to form a bottle cap wall cavity, and the bottle cap wall cavity is a groove of an annular structure facing downward, and the middle part of the surface of the upper cavity shell is recessed upward to form a bottle cap plate cavity, and the bottle cap plate cavity is an upward annular The groove of the structure, and the middle position of the bottle cap plate cavity is the embedded core cavity, the height of the embedded core cavity is slightly higher than the height of the upper cavity shell, the center of the bottle cap plate cavity surface is recessed downward to form the embedded core cavity, the bottom surface of the embedded core cavity is located above the bottom surface of the upper cavity shell, and when the lower cavity shell and the upper cavity shell are buckled with each other, a thin layer of cavity is formed between the embedded core cavity and the lower cavity shell, the nozzle mechanism includes a nozzle assembly and a diverter pipe, the nozzle assembly includes a nozzle seat and a material storage pipe, during injection molding, the head of the injection molding machine docks the nozzle seat, and uses the head to apply pressure to the upper loading plate, so that the upper mold shell and the lower mold shell are docked with each other, and the lower cavity shell and the upper cavity shell inside them are buckled with each other to form the mold cavity of the bottle cap, an injection port is provided at the center of the injection seat, the material storage pipe is connected to the injection port, the upper end of the diverter pipe is connected to the material storage pipe, and the lower end of the diverter pipe is connected to the bottle cap plate cavity.

[0007] Preferably, positioning columns are fixedly connected at the four corners of the bottom surface of the upper loading plate, and the download plate and the middle loading plate are positioned and docked through the positioning columns. Positioning columns are respectively provided at the four corners of the upper loading plate for positioning, so that the positioning columns, upper mold shell, lower mold shell, download plate and middle loading plate can be quickly stacked when injecting plastic.

[0008] Preferably, the injection pipe seat is located on the upper surface of the upper loading plate, the material storage pipe passes through the lower surface of the upper loading plate, both ends of the upper loading plate are fixedly connected with blocks, and blocks for raising the upper loading plate are respectively provided on both sides of the upper loading plate, so that a certain space is reserved between the upper loading plate and the middle loading plate.

[0009] Preferably, an electric cylinder is provided on the outer wall of the middle loading plate, an auxiliary mechanism is fixedly connected to the surface of the middle loading plate, the auxiliary mechanism includes a bent pipe, the inner wall of the bent pipe is slidably connected to a piston, one end of the piston is fixedly connected to a telescopic column, the output end of the electric cylinder is fixedly connected to the telescopic column, the piston in the bent pipe is controlled by the electric cylinder, and the position of the piston is used to adjust the air pressure in the control circuit component and the single vent nozzle, the other end of the bent pipe is connected to a reducer, the bottom end of the reducer is connected to the control circuit component, the bottom port of the control circuit component is connected to the embedded core cavity, so as to form a negative pressure in the cavity between the embedded core cavity and the lower cavity shell, so as to fill the cavity after the plastic is sucked in.

[0010] Preferably, the path control component includes an air pipe, the reducer is connected to the embedded core cavity through the air pipe, the top end of the air pipe is fixedly connected to a leak plate, the bottom end of the air pipe is provided with a ball core, and a spring is fixedly connected between the ball core and the leak plate. When the airflow direction is from bottom to top, the airflow pushes the ball core upward, and the path control component connects the embedded core cavity and the bent pipe. When the airflow direction is from top to bottom, the airflow pushes the ball core downward, so that the ball core is sealed on the air port of the embedded core cavity, thereby isolating the air path of the embedded core cavity and the bent pipe.

[0011] Preferably, the outer wall of the reducer is connected to a single vent nozzle, and the gas pressurized by the piston is discharged from the single vent nozzle on the outside of the reducer. The airflow discharged outward from the single vent nozzle blows the surface of the embedded core cavity obliquely downward, thereby cooling the plastic inside the embedded core cavity to quickly shape it.

[0012] An injection molding method for a bottle cap integrated injection molding device comprises the following steps:

[0013] Step 1: Injection: Plastic is injected into the bottle cap cavity from the injection port mechanism, filling the space of the bottle cap cavity and the bottle cap wall cavity;

[0014] Step 2: Suction: The control circuit assembly draws pressure upwards, and uses the negative pressure under the embedded core cavity to draw the plastic in.

[0015] Step 3: Auxiliary shaping: air flow is introduced above the embedded core cavity to dissipate heat and accelerate the shaping of the plastic below the embedded core cavity;

[0016] Step 4: Assist demoulding. Strong negative pressure is sucked into the embedded core cavity to assist the bottle cap in demoulding.

[0017] Preferably, in step 2, the electric cylinder drives the piston to move from the middle position of the elbow to the outer limit position.

[0018] Preferably, in step three, the electric cylinder drives the piston to move from the outer limit point of the elbow to the inner limit point.

[0019] Preferably, in step four, the electric cylinder drives the piston to move from the inner limit point of the elbow to the middle position.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, the bottle cap wall cavity is formed by recessing the lower cavity shell downward, and the bottle cap plate cavity is formed by recessing the upper cavity shell upward. When the lower cavity shell and the upper cavity shell are combined with each other, the bottle cap wall cavity and the bottle cap plate cavity are combined with each other to form the side wall mold cavity of the bottle cap. In addition, the middle position of the bottle cap plate cavity is recessed downward to form an embedded core cavity, so that a thin layer of cavity is reserved when the embedded core cavity and the lower cavity shell are buckled with each other, thereby forming a circular cavity on the bottle cap cover surface, so that the plastic injected into the injection molding equipment reserves a circular cavity in the middle after the bottle cap is integrally formed, which is convenient for adding an inner liner with a trademark, characters or Chinese characters into the cavity of the cover surface later, thereby meeting the diversified customization needs of customers and saving the injection molding mold opening cost for producing multiple types of bottle caps.

[0022] 2. In the present invention, the piston is driven to move outward by an electric cylinder, so that negative pressure is formed inside the bent pipe due to the pumping pressure of the piston, and the negative pressure formed inside the embedded core cavity is used to suck in the molten plastic, so that the plastic is guided into the narrow space of the bottle cap plate by the negative pressure. The force of the negative pressure is used to resist the hindrance of the tension of the plastic itself, so that the plastic can fill the space below the embedded core cavity, avoiding air pockets in the molded bottle cap due to tension, and ensuring the integrity of the bottle cap molding.

[0023] 3. In the present invention, the piston is driven inward by an electric cylinder, so that high pressure is generated inside the bent pipe due to the action of the piston, causing the air flow in the bent pipe to move downward, and the spherical core is used to separate the bent pipe from the embedded core cavity, so as to meet the requirement of the air flow being ejected outward from the single vent nozzle. The air flow discharged outward from the single vent nozzle blows the surface of the embedded core cavity obliquely downward, taking away the temperature of the molten plastic, so that the plastic inside the embedded core cavity is cooled and quickly shaped, thereby avoiding the problem that the thin part of the bottle cap is damaged due to the loose structure during subsequent demolding, and further ensuring the integrity of the bottle cap molding.

[0024] 4. In the present invention, when the plastic below the embedded core cavity is completely shaped, during the bottle cap demoulding process, the electric cylinder drives the piston to move outward, so that the inside of the bent pipe forms a negative pressure due to the pumping pressure of the piston. The connection of the air pipe is used to generate a negative pressure on the upper surface of the bottle cap, and the negative pressure of the airflow is used to resist the adsorption force of the lower cavity shell on the bottle cap surface, thereby assisting the equipment in demoulding.

[0025] 5. In the present invention, the storage tube is connected to the bottle cap plate cavity through multiple equally spaced diversion tubes, so that the molten plastic in the storage tube enters the bottle cap plate cavity from multiple directions, which facilitates the molten plastic to quickly fill the annular cavity, avoids the influence of the plastic fluidity on the molding effect during single sprue injection molding, and ensures that the material distribution on the surface of the molded bottle cap is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a bottle cap integrated injection molding device according to the present invention;

[0027] Figure 2 This is a schematic structural diagram of an upper loading plate and a middle loading plate of a bottle cap integrated injection molding device according to the present invention;

[0028] Figure 3 This is a side sectional view of a bottle cap integrated injection molding device according to the present invention;

[0029] Figure 4 This is a partial structural breakdown effect diagram of a bottle cap integrated injection molding device according to the present invention;

[0030] Figure 5 This is a structural schematic diagram of a nozzle mechanism and an auxiliary mechanism in a bottle cap integrated injection molding device of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of a control circuit component in a bottle cap integrated injection molding device of the present invention;

[0032] Figure 7 For the present invention Figure 6 A magnified rendering of the local structure at point A in the middle;

[0033] Figure 8 This is a schematic structural diagram of a lower cavity shell in a bottle cap integrated injection molding device of the present invention;

[0034] Figure 9 This is a structural schematic diagram of an upper cavity shell in a bottle cap integrated injection molding device of the present invention;

[0035] Figure 10 This is a rendering of the bottle cap being molded in the upper cavity shell and the lower cavity shell of the bottle cap integrated injection molding device of the present invention;

[0036] Figure 11 The present invention is a flowchart of the injection molding method of the bottle cap integrated injection molding equipment.

[0037] In the figure: 1. docking mechanism; 11. upper loading plate; 12. building block; 13. positioning column; 14. upper mold shell; 15. lower mold shell; 16. download plate; 17. middle loading plate; 2. injection port mechanism; 21. injection port assembly; 210. injection tube seat; 211. injection port; 212. storage tube; 22. diverter tube; 3. electric cylinder; 4. auxiliary mechanism; 41. telescopic column; 42. elbow; 43. piston; 44. reducer; 45. control circuit assembly; 451. ball core; 452. air pipe; 453. spring; 454. leak plate; 46. single vent nozzle; 5. lower cavity shell; 50. bottle cap wall cavity; 6. upper cavity shell; 60. bottle cap plate cavity; 61. embedded core cavity. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] Example 1: According to Figure 1-10 As shown: a bottle cap integrated injection molding device, including a docking mechanism 1 and a nozzle mechanism 2, the docking mechanism 1 includes an upper loading plate 11, a lower loading plate 16 and a middle loading plate 17, an upper mold shell 14 and a lower mold shell 15 are arranged between the lower loading plate 16 and the middle loading plate 17, the inner top wall of the upper mold shell 14 is fixedly connected to the upper cavity shell 6, the inner bottom wall of the lower mold shell 15 is fixedly connected to the lower cavity shell 5, the annular portion of the surface of the lower cavity shell 5 is recessed downward to form a bottle cap wall cavity 50, and the middle portion of the surface of the upper cavity shell 6 is recessed upward to form a bottle cap plate cavity 60. The center of the surface of the bottle cap plate cavity 60 is recessed downward to form an embedded core cavity 61. The bottom surface of the embedded core cavity 61 is located above the bottom surface of the upper cavity shell 6. The nozzle mechanism 2 includes a nozzle assembly 21 and a diverter pipe 22. The nozzle assembly 21 includes a nozzle tube seat 210 and a storage tube 212. A material injection port 211 is provided at the center of the nozzle tube seat 210. The storage tube 212 is connected to the material injection port 211. The upper end of the diverter pipe 22 is connected to the storage tube 212. The lower end of the diverter pipe 22 is connected to the bottle cap plate cavity 60.

[0040] In this embodiment, the injection molding equipment can be divided into two parts when it is installed and demolded. The upper loading plate 11, the building block 12, the positioning column 13, the middle loading plate 17 and the upper mold shell 14 are combined with each other, and the lower mold shell 15 and the downloading plate 16 are combined with each other as the lower mold component. When demolding, the upper mold shell 14 can be separated from the lower mold shell 15. During injection molding, the head of the injection molding machine docks the injection tube seat 210, and uses the head to apply pressure to the upper loading plate 11, so that the upper mold shell 14 and the lower mold shell 15 are docked with each other, and the lower cavity shell 5 and the upper cavity shell 6 inside are buckled together to form a mold cavity of the bottle cap;

[0041] The bottle cap wall cavity 50 is a groove of an annular structure facing downward, and the outer edge of the lower cavity shell 5 bulges upward to form a protective structure, so that the upper cavity shell 6 and the lower cavity shell 5 are positioned with each other, while ensuring the airtightness of the lower cavity shell 5 and the upper cavity shell 6. Similarly, the bottle cap plate cavity 60 is a groove of an annular structure facing upward, and the middle position of the bottle cap plate cavity 60 is an embedded core cavity 61. The height of the embedded core cavity 61 is slightly higher than the height of the upper cavity shell 6, so that when the lower cavity shell 5 and the upper cavity shell 6 are buckled with each other, a thin layer is formed between the embedded core cavity 61 and the lower cavity shell 5. Layer cavity, when the bottle cap is injection molded, most of the molten plastic enters the bottle cap wall cavity 50 and the bottle cap plate cavity 60 to form the outer wall of the bottle cap. With the continuous injection of plastic, the plastic enters the bottom of the embedded core cavity 61 to form the top cover of the bottle cap, and the center of the top cover of the bottle cap forms a cavity for the inner liner. After the bottle cap is formed, an inner liner with a trademark, characters or Chinese characters can be added to the cavity of the cap surface according to the manufacturer's requirements. The inner liner can be made of a material different from that of the bottle cap body to meet the diverse customization needs of customers.

[0042] Example 2: According to Figure 2 、 Figure 4 and Figure 5 As shown, positioning posts 13 are fixedly connected at the four corners of the bottom surface of the upper loading plate 11. The lower loading plate 16 and the middle loading plate 17 are positioned and docked via the positioning posts 13. The injection pipe seat 210 is located on the upper surface of the upper loading plate 11, and the storage pipe 212 extends through the lower surface of the upper loading plate 11. The upper loading plate 11 has blocks 12 fixedly connected at both ends.

[0043] In this embodiment, in order to meet the high-precision requirements when the lower cavity shell 5 and the upper cavity shell 6 are docked, positioning columns 13 are respectively provided at the four corners of the upper loading plate 11 for positioning, so that the positioning columns 13, upper mold shell 14, lower mold shell 15, lower loading plate 16 and middle loading plate 17 can be quickly stacked when injecting plastic. Blocks 12 for raising are respectively provided on both sides of the upper loading plate 11, so that a certain space is reserved between the upper loading plate 11 and the middle loading plate 17, so that the auxiliary mechanism 4 can be placed on the middle loading plate 17 to assist in bottle cap molding, and it is also convenient to divert the molten plastic injected into the nozzle assembly 21 in different directions through multiple diversion pipes 22. The diversion pipes 22 are evenly distributed above the bottle cap plate cavity 60 and enter the bottle cap plate cavity 60 from multiple injection ports, so that the molten plastic can quickly and evenly fill the cavity.

[0044] Example 3: According to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, an electric cylinder 3 is provided on the outer wall of the middle loading plate 17, and an auxiliary mechanism 4 is fixedly connected to the surface of the middle loading plate 17. The auxiliary mechanism 4 includes a bent pipe 42, and a piston 43 is slidably connected to the inner wall of the bent pipe 42. One end of the piston 43 is fixedly connected to the telescopic column 41, and the output end of the electric cylinder 3 is fixedly connected to the telescopic column 41. The other end of the bent pipe 42 is connected to a reducing pipe 44, and the bottom end of the reducing pipe 44 is connected to a control circuit component 45. The bottom opening of the control circuit component 45 is connected to the embedded core cavity 61.

[0045] In this embodiment, since a circular groove is reserved on the plate surface of the bottle cap, the thickness of the plastic below the inner liner of the bottle cap is relatively thin. The molten plastic is a fluid, and the surface of the fluid has a certain tension. When the molten plastic flows through the narrow opening, the tension will limit the plastic from entering the narrow place, which can easily make the thinner plate surface below the bottle cap difficult to form. An auxiliary mechanism 4 is provided above the middle loading plate 17, and the piston 43 in the elbow 42 is controlled by the electric cylinder 3. The position of the piston 43 is used to adjust the air pressure in the control component 45 and the single vent nozzle 46, so as to form a negative pressure in the cavity between the embedded core cavity 61 and the lower cavity shell 5, so as to facilitate the plastic to fill the cavity after being sucked in, avoid the defects of the bottle cap caused by too small a gap and tension limitation, so as to facilitate the integral molding of the bottle cap structure.

[0046] Example 4: According to Figure 3 、 Figure 5 、 Figure 6 and Figure 7 As shown, the control assembly 45 includes an air pipe 452, through which the reducer 44 communicates with the embedded core cavity 61. A leak plate 454 is fixedly connected to the top of the air pipe 452, and a ball core 451 is provided at the bottom of the air pipe 452. A spring 453 is fixedly connected between the ball core 451 and the leak plate 454. A single vent 46 is connected to the outer wall of the reducer 44.

[0047] Due to the influence of the bottle cap design, it is not only difficult to guide the molten plastic into the narrow molding mouth during molding, but also the insufficient thinness will affect the strength of the bottle cap, which will lead to two problems. First, the thinner part of the bottle cap is not strong enough during cooling and molding, which easily leads to appearance defects after demolding. Second, the thinner part has a larger contact area with the inner wall of the lower mold, resulting in excessive adsorption force and making it difficult to demold.

[0048] In this embodiment, when the control assembly 45 absorbs air pressure to form a negative pressure environment, air flows from the embedded core cavity 61 into the auxiliary mechanism 4, and the airflow direction is from bottom to top. The airflow pushes the ball 451 upward, and the control assembly 45 connects the embedded core cavity 61 and the bent pipe 42;

[0049] Similarly, the negative pressure formed by the adsorption of the control component 45 is used to assist in demolding the article, and the upward force of the airflow is used to offset the adsorption force of the lower mold on the bottle cap. The direction of the airflow is also from bottom to top. At this time, the embedded core cavity 61 and the elbow 42 are also connected to each other. On the contrary, when the piston 43 is pushed inward, the gas in the elbow 42 is discharged downward, and the direction of the airflow is from top to bottom. The airflow pushes the ball core 451 downward, so that the ball core 451 is sealed on the air port of the embedded core cavity 61, thereby isolating the air path of the embedded core cavity 61 and the elbow 42. The pressurized gas of the piston 43 is discharged from the single vent nozzle 46 on the outside of the reducer 44, and the airflow discharged outward from the single vent nozzle 46 blows the surface of the embedded core cavity 61 obliquely downward, thereby cooling the plastic inside the embedded core cavity 61 to quickly shape it.

[0050] Example 5: According to Figure 1 、 Figure 3 and Figure 11 As shown, an injection molding method of a bottle cap integrated injection molding device includes the following steps:

[0051] 1) Injection: Plastic is injected into the bottle cap plate cavity 60 from the injection port mechanism 2, filling the space between the bottle cap plate cavity 60 and the bottle cap wall cavity 50;

[0052] 2) Suction: The control assembly 45 draws pressure upward, using the negative pressure under the embedded core cavity 61 to draw the plastic in. The electric cylinder 3 drives the piston 43 from the middle position of the elbow 42 to the outer limit position.

[0053] 3) Auxiliary shaping: air flow is introduced above the embedded core cavity 61 to dissipate heat, accelerating the shaping of the plastic below the embedded core cavity 61. The electric cylinder 3 drives the piston 43 from the outer limit point of the elbow 42 to the inner limit point;

[0054] 4) Assisting demoulding: a strong negative pressure is sucked into the embedded core cavity 61 to assist in demoulding the bottle cap, wherein the electric cylinder 3 drives the piston 43 to move from the inner limit point of the elbow 42 to the middle position.

[0055] Attachment Figure 11 This is a cyclic process flow chart of the injection molding method of the bottle cap integrated injection molding equipment. The solid arrows in the figure represent the cyclic process flow of the injection molding equipment, and the hollow arrows in the figure represent the movement direction of the output end of the electric cylinder 3 in the injection molding equipment.

[0056] In this embodiment, the complete process of injection molding a single bottle cap is as follows: the head of the injection molding machine is docked with the injection tube seat 210, the injection molding machine provides downward pressure on the upper loading plate 11, so that the lower cavity shell 5 and the upper cavity shell 6 are docked with each other, and the lower end of the diverter tube 22 is docked with the injection port of the bottle cap plate cavity 60, and the injection molding machine is used to inject molten material into the injection tube seat 210, and the material flows into each diverter tube 22 respectively through the storage tube 212, and enters the inner cavity of the bottle cap plate cavity 60 from the injection port through multiple diverter tubes 22. At this time, the electric cylinder 3 also drives the piston 43 from the middle position of the bend 42 to the outermost end, and uses the negative pressure generated by the piston 43 to completely discharge the gas below the embedded core cavity 61, so that the negative pressure generated in the embedded core cavity 61 will enter The molten plastic entering the bottle cap plate cavity 60 is sucked in, so that the plastic fills the entire cavity of the bottle cap mold. After the cavity is filled with plastic, the injection molding machine stops feeding, and the electric cylinder 3 drives the piston 43 to advance to the innermost end of the elbow 42, and uses the airflow displaced by the piston 43 to be repelled to the single vent nozzle 46, and uses the air path on the upper surface of the embedded core cavity 61 to take away part of the heat, so that the plastic below the embedded core cavity 61 solidifies faster and more firmly. Finally, the upper mold shell 14 and the upper cavity shell 6 are separated upward, so that the upper cavity shell 6 is separated from the lower cavity shell 5. At the same time, the electric cylinder 3 drives the piston 43 from the innermost end of the elbow 42 to the middle, and uses the suction force generated by pulling to adsorb the bottle cap upward to assist the bottle cap to be quickly demolded from the lower cavity shell 5 and the upper cavity shell 6.

[0057] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bottle cap integrated injection molding device, comprising a docking mechanism (1) and a nozzle mechanism (2), wherein the docking mechanism (1) comprises an upper loading plate (11), a lower loading plate (16) and a middle loading plate (17), an upper mold shell (14) and a lower mold shell (15) are arranged between the lower loading plate (16) and the middle loading plate (17), and characterized in that: The inner top wall of the upper mold shell (14) is fixedly connected to the upper cavity shell (6), and the inner bottom wall of the lower mold shell (15) is fixedly connected to the lower cavity shell (5). The annular portion of the surface of the lower cavity shell (5) is recessed downward to form a bottle cap wall cavity (50). The middle portion of the surface of the upper cavity shell (6) is recessed upward to form a bottle cap plate cavity (60). The center portion of the surface of the bottle cap plate cavity (60) is recessed downward to form an embedded core cavity (61). The bottom surface of the embedded core cavity (61) is located on the upper cavity shell ( 6) above the bottom surface, the nozzle mechanism (2) includes a nozzle assembly (21) and a diverter pipe (22), the nozzle assembly (21) includes a nozzle tube seat (210) and a material storage tube (212), a material injection port (211) is provided at the center of the nozzle tube seat (210), the material storage tube (212) is communicated with the material injection port (211), the upper end of the diverter pipe (22) is communicated with the material storage tube (212), and the lower end of the diverter pipe (22) is communicated with the bottle cover plate cavity (60); An electric cylinder (3) is provided on the outer wall of the middle loading plate (17), an auxiliary mechanism (4) is fixedly connected to the surface of the middle loading plate (17), the auxiliary mechanism (4) comprises a curved tube (42), a piston (43) is slidably connected to the inner wall of the curved tube (42), one end of the piston (43) is fixedly connected to a telescopic column (41), an output end of the electric cylinder (3) is fixedly connected to the telescopic column (41), the other end of the curved tube (42) is connected to a reducing tube (44), the bottom end of the reducing tube (44) is connected to a control circuit assembly (41), and the output end of the electric cylinder (3) is fixedly connected to the telescopic column (41). 5), the bottom opening of the control circuit component (45) is communicated with the embedded core cavity (61); the control circuit component (45) includes an air pipe (452), the reducer (44) is communicated with the embedded core cavity (61) through the air pipe (452), the top end of the air pipe (452) is fixedly connected to a leak plate (454), the bottom end of the air pipe (452) is provided with a ball core (451), and a spring (453) is fixedly connected between the ball core (451) and the leak plate (454); the outer wall of the reducer (44) is communicated with a single vent nozzle (46).

2. The bottle cap integrated injection molding device according to claim 1, characterized in that: Positioning columns (13) are fixedly connected at the four corner positions of the bottom surface of the upper loading plate (11), and the lower loading plate (16) and the middle loading plate (17) are positioned and docked via the positioning columns (13).

3. The bottle cap integrated injection molding device according to claim 1, characterized in that: The injection pipe seat (210) is located on the upper surface of the upper loading plate (11), the material storage pipe (212) passes through the lower surface of the upper loading plate (11), and both ends of the upper loading plate (11) are fixedly connected with a building block (12).

4. An injection molding method for a bottle cap integrated injection molding device, characterized in that: The bottle cap integrated injection molding device according to any one of claims 1 to 3 is used, comprising the following steps: S1, injection, plastic is injected into the bottle cap plate cavity (60) from the injection port mechanism (2), filling the space of the bottle cap plate cavity (60) and the bottle cap wall cavity (50); S2, sucking the material, the control circuit component (45) draws pressure upward, and uses the negative pressure under the embedded core cavity (61) to attract the plastic to be poured in; S3, auxiliary shaping, air flow is introduced above the embedded core cavity (61) to dissipate heat, and accelerate the shaping of the plastic below the embedded core cavity (61); S4, auxiliary demoulding, strong negative pressure is sucked into the embedded core cavity (61) to assist the bottle cap in demoulding.

5. The injection molding method of the bottle cap integrated injection molding equipment according to claim 4, characterized in that: In step S2, the electric cylinder (3) drives the piston (43) to move from the middle position of the curved pipe (42) to the outer limit position.

6. The injection molding method of the bottle cap integrated injection molding equipment according to claim 4, characterized in that: In step S3, the electric cylinder (3) drives the piston (43) to move from the outer limit point of the curved pipe (42) to the inner limit point.

7. The injection molding method of the bottle cap integrated injection molding equipment according to claim 4, characterized in that: In step S4, the electric cylinder (3) drives the piston (43) to move from the inner limit point of the bend (42) to the middle position.

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