Bottle cap prepared by injection molding process and preparation method thereof

Abstract

The invention discloses a bottle cap prepared by an injection molding process and a preparation method thereof, and relates to the technical field of plastic product preparation, the bottle cap comprises a cap body, an antiskid ring is integrally formed outside the cap body, and a threaded groove is integrally formed inside the cap body; comprising an injection mold, the injection mold is composed of a mounting plate, a shaping plate, an injection molding plate, a shaping assembly, a forming assembly, a slotting assembly and a demolding assembly, and the preparation method comprises the following steps that S1, a proper amount of PP particles, a nucleating agent, a dispersing agent and aluminum oxide are weighed according to the proportion; the device has the advantages that the strength and fireproof and heat-resistant performance of the bottle cap are enhanced, and injection molding, anti-theft ring molding, separation of the bottle cap and an injection molding plate and demolding treatment of the bottle cap and a molding rod can be automatically completed by utilizing the moving process of the molding plate relative to the mounting plate and the injection molding plate in the injection molding process; and on the premise of ensuring the quality of the bottle caps, the production efficiency and the production cost are effectively improved, and large-scale production of the bottle caps is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of plastic product preparation, and in particular to a bottle cap prepared by an injection molding process and a preparation method thereof. Background Art

[0002] Bottle caps are a common item used to seal containers. Currently used bottle caps are generally made of plastic and metal. Plastic materials are cheaper and simpler to manufacture than metal materials, so they are more widely used. The most common plastic material is PP (polypropylene) material, which has excellent chemical resistance, heat resistance and electrical insulation. When using it to make bottle caps, there are generally two methods: compression molding and injection molding. Compression molding is mostly used for plastics with strong fluidity, and its molding speed is slower. In the materials used in injection molding, some reinforcing materials can be added to improve product quality, and its molding speed is faster.

[0003] Existing bottle caps are generally mostly formed by compression molding, and the produced bottle caps are relatively soft and easy to deform. Injection molding can add corresponding reinforcing agents according to the required quality. However, when the bottle cap is produced by injection molding, the anti-theft ring on it is difficult to automatically form in the injection mold, and the anti-slip ring on the surface of the bottle cap and the spiral groove inside will also increase the difficulty of demolding. Therefore, it is necessary to design a bottle cap prepared by injection molding process and a preparation method thereof. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a bottle cap prepared by an injection molding process and a preparation method thereof.

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

[0006] A bottle cap prepared by an injection molding process comprises a cap body, wherein an anti-slip ring is integrally formed on the outside of the cap body, a threaded groove is integrally formed on the inside of the cap body, and a plurality of grooves are evenly arranged on the cap body, wherein the plurality of grooves are all located near an opening of the cap body, and the cap body is composed of PP particles, a nucleating agent, a dispersant and alumina, wherein the weight proportion of each component is: 90 parts of PP particles, 0.3 parts of nucleating agent, 0.3 parts of dispersant and 0.5 parts of alumina.

[0007] A method for preparing a bottle cap by an injection molding process, comprising an injection mold, wherein the injection mold is composed of a mounting plate, a shaping plate, an injection molding plate, a shaping component, a molding component, a slotting component and a demoulding component, and comprises the following steps:

[0008] S1: Weigh appropriate amounts of PP particles, nucleating agent, dispersant and alumina according to the ratio, and mix them evenly to form powder;

[0009] S2: Put the powder obtained in S1 into the injection molding machine and perform hot-melt mixing treatment on it. At this time, let the shaping plate approach the injection molding plate on the mounting plate, and let the upper molding component enter the shaping plate, and the slotting component is running at the same time;

[0010] S3: Injecting the melted raw material from the injection molding machine into the injection molding plate, and completing the molding of the cover body through the cooperation of the shaping component and the forming component;

[0011] S4: After injection molding, the shaping plate is moved away from the injection molding plate. At the beginning of the movement, the shaping component runs in the reverse direction to separate the cover body from the injection molding plate. Then the slotting component and the demoulding component run at the same time to smoothly demould the cover body.

[0012] In the above-mentioned method for preparing a bottle cap by an injection molding process, a telescopic cylinder is fixedly mounted on the mounting plate, and the output end of the telescopic cylinder is fixedly connected to the shaping plate, and an injection hole is opened on the injection molding plate.

[0013] In the above-mentioned method for preparing bottle caps prepared by an injection molding process, the molding component includes multiple molding mechanisms, and the molding mechanisms include an adjusting screw rod rotatably connected to the injection molding plate, the injection molding plate is provided with multiple installation grooves, and each installation groove is slidably connected with two symmetrically arranged molding plates, and each of the installation grooves is communicated with the injection hole at one end away from the molding plate, and each molding plate is provided with a molding groove matched with an anti-slip ring on the inside, and each of the installation grooves is provided with a moving groove on the side wall, and each moving groove is slidably installed with two moving blocks fixedly connected to the corresponding molding plates, and the parts of the adjusting screw rods located in the corresponding multiple moving grooves are provided with bidirectional threaded sections, and each bidirectional threaded section is respectively threadedly connected with the corresponding two moving blocks, and multiple one-way separation mechanisms are installed between the molding plate and the injection molding plate, and each one-way separation mechanism is respectively matched with the corresponding adjusting screw rod.

[0014] In the above-mentioned method for preparing a bottle cap by an injection molding process, the one-way separation mechanism is composed of a turntable, a fixed gear, a fixed rack, a connecting seat, a one-way bearing and a torsion spring. The turntable is fixedly mounted on the end of the adjusting screw outside the injection molding plate, the torsion spring is installed between the turntable and the injection molding plate, the connecting seat is connected to the turntable through a one-way bearing, the fixed gear is fixedly mounted on the connecting seat, the fixed rack is fixedly mounted on the molding plate, and the fixed rack is meshed with the fixed gear.

[0015] In the above-mentioned method for preparing bottle caps by an injection molding process, the molding assembly is composed of multiple molding mechanisms, and the molding mechanisms include a chain transmission structure installed in a molding plate, and the molding plate is provided with multiple accommodating grooves, and each accommodating groove corresponds to a corresponding installation groove position, a molding rod is installed in each of the accommodating grooves, and each molding rod is fixed with a spiral protrusion that matches the threaded groove, a moving screw rod is rotatably installed in each of the accommodating grooves, and each moving screw rod is threadedly connected with a pulling block that rotates with the corresponding molding rod, and the chain transmission structure is installed between multiple moving screw rods.

[0016] In the above-mentioned method for preparing bottle caps by injection molding, the demoulding assembly is composed of multiple demoulding mechanisms, and the demoulding mechanism includes a guide block fixedly mounted on the shaping rod, and a spiral groove that cooperates with the guide block is opened on the side wall of the accommodating groove.

[0017] In the above-mentioned method for preparing a bottle cap prepared by an injection molding process, the chain transmission structure is composed of a chain, a driving sprocket, a round rod and a plurality of driven sprockets, and the plurality of driven sprockets are respectively fixedly mounted on the corresponding movable screw rods, the driving sprocket is rotatably mounted in the shaping plate through the round rod, the chain is sleeved between the driving sprocket and the plurality of driven sprockets, a mounting cavity matching the chain transmission structure is provided in the shaping plate, and two torsion springs are installed between the mounting cavity and the driving sprocket, a convex rod is installed at one end of the round rod away from the driving sprocket through two one-way bearings, a circular hole matching the convex rod is provided on the mounting plate, and a telescopic rod is fixedly installed in the circular hole, a telescopic groove matching the telescopic rod is provided on the convex rod, and a spiral groove two is provided on the middle side wall of the telescopic groove, an annular groove is provided on the side wall of the spiral groove two close to the round rod, a guide groove is provided on the side wall of the other end of the spiral groove two, and a guide rod matching the guide groove, the spiral groove two and the annular groove is fixedly installed on the side wall of the telescopic rod.

[0018] In the above-mentioned method for preparing bottle caps by an injection molding process, the grooving assembly is composed of a plurality of grooving mechanisms, and the grooving mechanisms include a pull rod slidably mounted on a shaping plate, and the pull rod is slidably connected to a movable screw rod and a pulling block, and a connecting plate is fixedly mounted on one end of the pull rod located in the shaping rod, and a plurality of connecting rods are rotatably arranged on the side wall of the connecting plate through a plurality of hinge seats, and a protrusion is also rotatably arranged on the end of each connecting rod away from the connecting plate through a hinge seat, a plurality of arc grooves matching the corresponding protrusions are provided on the side wall of the shaping rod, and a swinging cavity matching the connecting plate, the pull rod and a plurality of connecting rods is provided in the shaping rod.

[0019] In the above-mentioned method for preparing bottle caps prepared by an injection molding process, a plurality of fixed plates are slidably installed on the side wall of the shaping plate away from the injection molding plate, and each fixed plate is fixedly connected to the corresponding plurality of pull rods, and a connecting rack is fixedly installed on the side wall of each fixed plate, and a plurality of driving racks are fixedly installed on the side wall of the injection molding plate, and a plurality of connecting gears are rotatably installed on the side wall of the shaping plate, and each connecting gear is respectively matched with the corresponding connecting rack and the driving rack, and the connecting gear consists of a large gear and a small gear, the small gear is meshed with the driving rack, and the large gear is meshed with the connecting gear.

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

[0021] 1: The addition of alumina can enhance the strength and fire and heat resistance of the bottle cap, making it less likely to deform under certain external forces and high temperatures, thereby improving product quality and making the sealing effect on the container more ideal.

[0022] 2: Through the design of the slotting component, multiple protrusions can be used to directly form multiple through grooves at the bottom of the bottle cap during the injection molding process, and then an anti-theft ring can be formed at the bottom of the bottle cap under the action of the multiple grooves. There is no need to perform additional processing on the anti-theft ring after injection molding, which effectively improves the injection molding efficiency. After the injection molding is completed, the multiple protrusions can be automatically contracted, which is convenient for the subsequent demolding between the bottle cap and the shaping rod.

[0023] 3: Through the cooperation of the shaping mechanism and the one-way separation mechanism, the two adjacent shaping plates can be closely fitted during the injection molding process to ensure that the external shape of the bottle cap remains unchanged, and the shaping plate and the bottle cap are automatically separated after the injection molding is completed, effectively reducing the difficulty of demoulding the bottle cap and the shaping plate.

[0024] 4: Through the cooperation of the molding mechanism, the demoulding mechanism, the second torsion spring, the second one-way bearing, the convex rod and the telescopic rod, after the injection molding is completed, the separation action of the molding plate and the injection molding plate can be utilized to automatically shrink and rotate the molding rod, thereby realizing lossless demoulding between the bottle cap and the molding rod and ensuring the quality of the bottle cap.

[0025] In summary, the present invention enhances the strength and fire and heat resistance of the bottle cap, and during the injection molding process, the movement of the shaping plate relative to the mounting plate and the injection molding plate can be utilized to automatically complete the injection molding, theft-proof ring molding, the separation of the bottle cap and the injection molding plate, and the demolding of the bottle cap and the shaping rod, thereby effectively improving the production efficiency and production cost while ensuring the quality of the bottle cap, and facilitating the large-scale production of the bottle cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a bottle cap prepared by an injection molding process proposed by the present invention;

[0027] Figure 2 This is a structural schematic diagram of a shaping mold used in a method for preparing a bottle cap using an injection molding process proposed by the present invention;

[0028] Figure 3 for Figure 2 Schematic diagram of the structure after removing the mounting plate;

[0029] Figure 4 for Figure 3 Schematic diagram of the structure after removing the shaping plate;

[0030] Figure 5 for Figure 1 Schematic diagram of the structure after removing the injection molded plate and deflecting it at a certain angle;

[0031] Figure 6 for Figure 5 Schematic diagram of the structure after removing the shaping plate;

[0032] Figure 7 for Figure 6 Schematic diagram of the structure with the mounting plate removed;

[0033] Figure 8 for Figure 7 A front view of the structure at one of the adjusting screw rods;

[0034] Fig. 9 for Figure 8 Schematic diagram of the structure of the AA surface in the middle;

[0035] Fig.10 for Fig. 9 Schematic diagram of the three-dimensional structure;

[0036] Fig.11 for Fig.10 An enlarged schematic diagram of the structure at the middle convex rod;

[0037] Fig.12 for Figure 7 A schematic diagram of the structure at one of the shaping rods after it is deflected at a certain angle;

[0038] Fig.13 for Fig.12 Schematic diagram of structural decomposition;

[0039] Fig.14 for Figure 3 A schematic diagram of the structure at one of the fixed gears after it is deflected by a certain angle;

[0040] Fig.15 for Fig.14 Schematic diagram of structural decomposition;

[0041] Fig.16 for Figure 2Schematic diagram of the structure after the middle shaping plate is deflected at a certain angle;

[0042] Fig.17 for Figure 2 Schematic diagram of the structure after the injection molded plate is deflected at a certain angle.

[0043] In the figure: 1, cover; 101, thread groove; 102, anti-skid ring; 103, groove; 2, mounting plate; 3, shaping plate; 4, injection molding plate; 5, mounting groove; 6, injection molding hole; 7, moving groove; 8, shaping block; 9, moving block; 10, adjusting screw rod; 11, turntable; 12, fixed gear; 13, fixed rack; 14, connecting seat; 15, one-way bearing 1; 16, torsion spring 1; 17, receiving groove; 18, shaping rod; 19, spiral protrusion; 20, protrusion; 21, Moving screw; 22, arc groove; 23, pull rod; 24, connecting plate; 25, connecting rod; 26, capstan seat; 27, guide block; 28, spiral groove one; 29, fixed plate; 30, connecting rack; 31, driving rack; 32, connecting gear; 33, chain transmission structure; 34, round rod; 35, torsion spring two; 36, one-way bearing two; 37, convex rod; 38, telescopic groove; 39, telescopic rod; 40, spiral groove two; 41, guide rod; 42, guide groove; 43, annular groove. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Reference Figure 1 , a bottle cap prepared by injection molding process, including a cap body 1, an anti-slip ring 102 is integrally formed on the outside of the cap body 1, a thread groove 101 is integrally formed on the inside of the cap body 1, and a plurality of grooves 103 are evenly arranged on the cap body 1, and the plurality of grooves 103 are all located near the opening of the cap body 1, the cap body 1 is composed of PP particles, a nucleating agent, a dispersant and alumina, wherein the weight proportion of each component is: 90 parts of PP particles, 0.3 parts of nucleating agent, 0.3 parts of dispersant, and 0.5 parts of alumina, wherein the addition of alumina can enhance the strength of the cap body 1, making it less likely to deform, and also can improve the fireproof and heat-resistant performance of the cap body 1 to a certain extent, the thread groove 101 is used for sealing connection between the cap body 1 and the container, the plurality of grooves 103 form an anti-theft ring at the bottom of the cap body 1, and the design of the anti-slip ring 102 is convenient for people to twist the bottle cap;

[0046] A method for preparing a bottle cap prepared by an injection molding process comprises an injection mold, wherein the injection mold is composed of a mounting plate 2, a shaping plate 3, an injection molding plate 4, a shaping component, a molding component, a slotting component and a demoulding component, and comprises the following steps:

[0047] S1: Weigh appropriate amounts of PP particles, nucleating agent, dispersant and alumina according to the ratio, and mix them evenly to form powder;

[0048] S2: The powder obtained in S1 is put into the injection molding machine and subjected to hot-melt mixing treatment. At this time, the shaping plate 3 is moved closer to the injection molding plate 4 on the mounting plate 2, and the upper molding component is inserted into the shaping plate 4, while the slotting component is running;

[0049] S3: Injecting the melted raw material from the injection molding machine into the injection molding plate 4, and completing the molding of the cover body 1 through the cooperation of the shaping component and the forming component;

[0050] S4: After injection molding, the shaping plate 3 is moved away from the injection molding plate 4. At the beginning of the movement, the shaping component runs in reverse to separate the cover body 1 from the injection molding plate 4. Then the slotting component and the demoulding component run at the same time to smoothly demould the cover body 1.

[0051] Reference Figure 2-17 A telescopic cylinder is fixedly installed on the mounting plate 2, and the output end of the telescopic cylinder is fixedly connected to the shaping plate 3. An injection hole 6 is opened on the injection molding plate 4. The telescopic cylinder is an existing product. Its working principle and specific structure are not elaborated here. When it works, it can drive the shaping plate 3 to move relative to the injection molding plate 4. The injection molding plate 4 is connected to the existing injection molding machine, wherein the injection molding machine is not shown in the figure, and the existing injection molding machine product can be used. The injection hole 6 is used to inject the molten plastic raw material from the injection molding machine into each corresponding mold to complete the molding process of the bottle cap.

[0052] The shaping assembly includes multiple shaping mechanisms, which include an adjusting screw 10 rotatably connected to the injection molding plate 4. The injection molding plate 4 is provided with multiple mounting grooves 5, and each mounting groove 5 is slidably connected with two symmetrically arranged shaping plates 8, and each mounting groove 5 is communicated with the injection molding hole 6 at one end away from the shaping plate 3. A molding groove matching the anti-slip ring 102 is provided on the interior of each shaping plate 8, and a moving groove 7 is provided on the side wall of each mounting groove 5, and two moving blocks 9 fixedly connected to the corresponding shaping plates 8 are slidably installed in each moving groove 7. The parts of the adjusting screw 10 located in the corresponding multiple moving grooves 7 are provided with bidirectional threaded sections, and each bidirectional threaded section is threadedly connected with the corresponding two moving blocks 9 respectively. The design of the bidirectional threaded sections can allow the two corresponding moving blocks 9 to drive the two shaping plates 8 to move relative to each other when the adjusting screw 10 rotates. Therefore, after the injection molding is completed, the two shaping plates 8 are moved away from each other, which can effectively reduce the difficulty of separating the cover body 1 and the two shaping plates 8.

[0053] A plurality of one-way separation mechanisms are installed between the shaping plate 3 and the injection molding plate 4, and each one-way separation mechanism is respectively matched with the corresponding adjusting screw 10. The one-way separation mechanism is composed of a turntable 11, a fixed gear 12, a fixed rack 13, a connecting seat 14, a one-way bearing 15 and a torsion spring 16. The turntable 11 is fixedly installed on the end of the adjusting screw 10 outside the injection molding plate 4, and the torsion spring 16 is installed between the turntable 11 and the injection molding plate 4. The connecting seat 14 is connected to the turntable 11 through a one-way bearing 15. The fixed gear 12 is fixedly installed on the connecting seat 14, and the fixed rack 13 is fixedly installed on the shaping plate 3, and the fixed rack 13 is meshed with the fixed gear 12. The elastic force of the torsion spring 16 can keep the turntable 11 stationary relative to the injection molding plate 4 when it is not subjected to external forces. At this time, the adjusting screw 10 cooperates with the plurality of moving blocks 9 so that the corresponding two shaping plates 8 are closely attached to each other, and the two form the external shape of the cover body 1. The design of the one-way bearing 15 makes it possible for the fixed gear 12 to be rotationally connected with the turntable 11 when the shaping plate 3 approaches the injection molding plate 4. At this time, the meshing effect of the fixed rack 13 and the fixed gear 12 will not drive the turntable 11 to rotate, thereby ensuring the stability of the positions of the multiple shaping plates 8. When the injection molding is completed and the shaping plate 3 is moved away from the injection molding plate 4, the fixed gear 12 and the turntable 11 are in a fixed state. At this time, the meshing of the fixed rack 13 and the fixed gear 12 will allow the turntable 11 to rotate at the same time, thereby automatically allowing the adjusting screw 10 to rotate to separate the adjacent shaping plates 8, thereby facilitating the separation of the cover body 1 and the injection molding plate 4. When the shaping plate 3 moves a sufficient distance to completely remove the cover body 1 from the injection molding plate 4, the fixed rack 13 is separated from the fixed gear 12. At this time, the elastic force of the torsion spring 16 will cause the adjusting screw 10 to rotate and reset, allowing the multiple shaping plates 8 to reset and fit each other again, preparing for subsequent injection molding.

[0054] The molding assembly is composed of a plurality of molding mechanisms, and the molding mechanisms include a chain transmission structure 33 installed in the molding plate 3, a plurality of receiving grooves 17 are provided on the molding plate 3, and each receiving groove 17 corresponds to the position of the corresponding mounting groove 5, a molding rod 18 is installed in each receiving groove 17, and each molding rod 18 is fixed with a spiral protrusion 19 matching with the thread groove 101, a moving screw rod 21 is rotatably installed in each receiving groove 17, and each moving screw rod 21 is threadedly connected with a corresponding molding rod 18. The chain transmission structure 33 is installed between multiple moving screw rods 21. When the moving screw rod 21 rotates, it can drive the shaping rod 18 to move in the accommodating groove 17. When the shaping rod 18 protrudes out of the shaping plate 3, the shaping plate 3 and the injection molding plate 4 are fitted together to shape the internal shape of the cover body 1 through the shaping rod 18. Under the action of the chain transmission structure 33, multiple moving screw rods 21 can be driven to rotate in the same direction at the same time, so that the positions of multiple shaping rods 18 on the shaping plate 3 can be controlled at the same time.

[0055] The chain transmission structure 33 is composed of a chain, a driving sprocket, a round rod 34 and a plurality of driven sprockets. The plurality of driven sprockets are respectively fixedly mounted on the corresponding movable screw rods 21. The driving sprocket is rotatably mounted in the shaping plate 3 through the round rod 34. The chain is sleeved between the driving sprocket and the plurality of driven sprockets. An installation cavity matching the chain transmission structure 33 is provided in the shaping plate 3, and a torsion spring 2 35 is installed between the installation cavity and the driving sprocket. The elastic force of the torsion spring 2 35 can keep the driving sprocket stationary in the installation cavity when the driving sprocket is not affected by the torsion force. At this time, the plurality of shaping rods 18 are kept protruding outside the shaping plate 3.

[0056] The end of the round rod 34 away from the driving sprocket is equipped with a convex rod 37 through a one-way bearing 36. The design of the one-way bearing 36 is that when the shaping plate 3 approaches the mounting plate 2, the convex rod 37 and the round rod 34 are in a fixed state, and conversely, when the shaping plate 3 moves away from the mounting plate 2, the convex rod 37 and the round rod 34 are in a rotating state. Since the round rod 34 is connected to the driving sprocket, when the round rod 34 and the convex rod 37 are in a rotating state, the rotation of the convex rod 37 will not affect the driving sprocket. Conversely, when the round rod 34 and the convex rod 37 are in a fixed state, the rotation of the convex rod 37 can drive the driving sprocket to rotate simultaneously through the round rod 34.

[0057] A circular hole matching with the protruding rod 37 is provided on the mounting plate 2, and a telescopic rod 39 is fixedly installed in the circular hole, a telescopic groove 38 matching with the telescopic rod 39 is provided on the protruding rod 37, and a spiral groove 40 is provided on the middle side wall of the telescopic groove 38, an annular groove 43 is provided on the side wall of the spiral groove 40 at one end close to the round rod 34, and a guide groove 42 is provided on the side wall of the other end of the spiral groove 40, and a guide rod 41 matching with the guide groove 42, the spiral groove 40 and the annular groove 43 is fixedly installed on the side wall of the telescopic rod 39. When the shaping plate 3 approaches the mounting plate 2, the guide rod 41 is initially located in the guide groove 42, at this time, the protruding rod 37 is slidingly rotating relative to the mounting plate 2, and then continues to move, and the guide rod 41 enters the second spiral groove 40 from the guide groove 42. At this time, the protruding rod 37 rotates under the cooperation of the guide rod 41 and the second spiral groove 40, and the active sprocket is driven to rotate through the round rod 34. Under the action of the chain transmission structure 33, the multiple moving screw rods 21 are rotated at the same time, and the multiple shaping rods 18 are received in the receiving groove 17. Then the guide rod 41 enters the annular groove 43. At this time, the elastic force of the second torsion spring 35 is released, allowing the multiple moving screw rods 21 to reset and rotate, and the multiple shaping rods 18 are protruded outward from the shaping plate 3 again;

[0058] The depth of the guide groove 42 is greater than or equal to the depth of the mounting groove 5, and the straight-line length of the spiral groove 28 is greater than or equal to the straight-line length of the thread groove 101. Through the size design here, during the demolding process after the injection molding is completed, the shaping block 8 can be separated from the cover body 1 first, and then the shaping rod 18 can completely take the cover body 1 out of the mounting groove 5 before the demolding process is performed, ensuring that the demolding operation is carried out smoothly.

[0059] The demoulding assembly is composed of a plurality of demoulding mechanisms, which include a guide block 27 fixedly mounted on the shaping rod 18, and a spiral groove 28 cooperating with the guide block 27 is provided on the side wall of the accommodating groove 17. With the cooperation of the guide block 27 and the spiral groove 28, when the shaping rod 18 enters the accommodating groove 17, it can be rotated at the same time, and then the spiral protrusion 19 thereon cooperates with the thread groove 101, and the cover body 1 and the shaping rod 18 are separated by reverse thread rotation, without causing scratches to the thread groove 101 inside the cover body 1, thereby ensuring the quality of the cover body 1.

[0060] The slotting assembly is composed of a plurality of slotting mechanisms, which include a pull rod 23 slidably mounted on the shaping plate 3, and the pull rod 23 is slidably connected to the movable screw 21 and the pulling block, and one end of the pull rod 23 located in the shaping rod 18 is fixedly mounted with a connecting plate 24, and a plurality of connecting rods 25 are rotatably arranged on the side wall of the connecting plate 24 through a plurality of hinge seats 26, and a protrusion 20 is also rotatably installed on the end of each connecting rod 25 away from the connecting plate 24 through the hinge seat 26, and a plurality of arcs matching the corresponding protrusions 20 are opened on the side wall of the shaping rod 18 The arc-shaped groove 22, the shaping rod 18 is provided with a swing cavity that cooperates with the connecting plate 24, the pull rod 23 and the multiple connecting rods 25. When the pull rod 23 moves in the shaping rod 18 toward the injection molding plate 4, the multiple protrusions 20 can be opened outward through the cooperation of the connecting plate 24 and the multiple pull rods 25, and since the arc-shaped groove 22 limits the moving direction of the protrusion 20, it can be stretched evenly. Subsequently, in the injection molding process, the existence of the protrusion 20 can be used to form a groove 103 on the cover body 1, thereby completing the molding of the anti-theft ring.

[0061] A plurality of fixed plates 29 are slidably mounted on the side wall of the shaping plate 3 away from the injection molding plate 4, and each fixed plate 29 is fixedly connected to the corresponding plurality of tie rods 23. The design of the fixed plate 29 can control the movement of the plurality of tie rods 23 at the same time. A connecting rack 30 is fixedly mounted on the side wall of each fixed plate 29, a plurality of driving racks 31 are fixedly mounted on the side wall of the injection molding plate 4, and a plurality of connecting gears 32 are rotatably mounted on the side wall of the shaping plate 3, and each connecting gear 32 is respectively connected to the corresponding connecting rack 30. 0 and the driving rack 31 cooperate, the connecting gear 32 is composed of a large gear and a small gear, the small gear is meshed with the driving rack 31, and the large gear is meshed with the connecting gear 32. Through the design of the large gear and the small gear, the fixing plate 29 can be automatically moved at a faster speed when the shaping plate 3 is away from the injection molding plate 4, so that it is away from the shaping plate 3, and the multiple protrusions 20 are automatically received in the corresponding arc grooves 22, so that the cover body 1 can be smoothly demoulded from the shaping rod 18.

[0062] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0063] 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 prepared by injection molding, comprising a cap body (1), characterized in that: The cover body (1) is integrally formed with an anti-slip ring (102) on the outside, the cover body (1) is integrally formed with a thread groove (101) on the inside, and a plurality of grooves (103) are evenly arranged on the cover body (1), and the plurality of grooves (103) are all located near the opening of the cover body (1). The cover body (1) is composed of PP particles, a nucleating agent, a dispersant and aluminum oxide, wherein the weight ratio of each component is: 90 parts of PP particles, 0.3 parts of nucleating agent, 0.3 parts of dispersant, and 0.5 parts of aluminum oxide.

2. A method for preparing a bottle cap by injection molding, comprising an injection mold, wherein the injection mold is composed of a mounting plate (2), a shaping plate (3), an injection molding plate (4), a shaping component, a molding component, a slotting component and a demoulding component, characterized in that: The following steps are involved: S1: Weigh appropriate amounts of PP particles, nucleating agent, dispersant and alumina according to the ratio, and mix them evenly to form powder; S2: The powder obtained in S1 is put into the injection molding machine and subjected to hot-melt mixing treatment. At this time, the shaping plate (3) is moved closer to the injection molding plate (4) on the mounting plate (2), and the molding component on it is inserted into the shaping plate (4), and the slotting component is operated at the same time; S3: injecting the melted raw material from the injection molding machine into the injection molding plate (4), and completing the molding of the cover body (1) through the cooperation of the shaping component and the forming component; S4: After injection molding, the shaping plate (3) is moved away from the injection molding plate (4). At the beginning of the movement, the shaping component operates in the reverse direction to separate the cover body (1) from the injection molding plate (4). Then, the slotting component and the demoulding component operate simultaneously to smoothly demould the cover body (1).

3. The method for preparing a bottle cap by injection molding according to claim 2, characterized in that: A telescopic cylinder is fixedly mounted on the mounting plate (2), and an output end of the telescopic cylinder is fixedly connected to the shaping plate (3), and an injection hole (6) is provided on the injection plate (4).

4. The method for preparing a bottle cap by injection molding according to claim 3, characterized in that: The shaping assembly comprises a plurality of shaping mechanisms, wherein the shaping mechanisms comprise an adjusting screw rod (10) rotatably connected to the injection molding plate (4), the injection molding plate (4) is provided with a plurality of mounting grooves (5), and each mounting groove (5) is slidably connected to two symmetrically arranged shaping plates (8), and each mounting groove (5) is connected to the injection molding hole (6) at one end away from the shaping plate (3), and each shaping plate (8) is provided with a molding groove matched with the anti-slip ring (102) on its inner wall, and each mounting groove (5) is provided with a plurality of adjusting screw rods (10) rotatably connected to the injection molding plate (4), ... The side walls are provided with movable grooves (7), and two movable blocks (9) fixedly connected to the corresponding shaping plates (8) are slidably installed in each movable groove (7). The parts of the adjusting screw rod (10) located in the corresponding plurality of movable grooves (7) are provided with bidirectional threaded sections, and each bidirectional threaded section is respectively threadedly connected to the corresponding two movable blocks (9). A plurality of one-way separation mechanisms are installed between the shaping plate (3) and the injection molding plate (4), and each one-way separation mechanism is respectively matched with the corresponding adjusting screw rod (10).

5. The method for preparing a bottle cap by injection molding according to claim 4, characterized in that: The one-way separation mechanism is composed of a rotating disk (11), a fixed gear (12), a fixed rack (13), a connecting seat (14), a one-way bearing (15) and a torsion spring (16); the rotating disk (11) is fixedly mounted on one end of the adjusting screw (10) located outside the injection molding plate (4); the torsion spring (16) is mounted between the rotating disk (11) and the injection molding plate (4); the connecting seat (14) is connected to the rotating disk (11) via the one-way bearing (15); the fixed gear (12) is fixedly mounted on the connecting seat (14); the fixed rack (13) is fixedly mounted on the molding plate (3); and the fixed rack (13) is meshed with the fixed gear (12).

6. The method for preparing a bottle cap by injection molding according to claim 2, characterized in that: The molding assembly is composed of a plurality of molding mechanisms, and the molding mechanisms include a chain transmission structure (33) installed in a molding plate (3). The molding plate (3) is provided with a plurality of receiving grooves (17), and each receiving groove (17) corresponds to the position of a corresponding installation groove (5). A molding rod (18) is installed in each of the receiving grooves (17), and each molding rod (18) is fixed with a spiral protrusion (19) that matches the threaded groove (101). A movable screw rod (21) is rotatably installed in each of the receiving grooves (17), and each movable screw rod (21) is threadedly connected with a pulling block that rotatably matches the corresponding molding rod (18). The chain transmission structure (33) is installed between the plurality of movable screw rods (21).

7. The method for preparing a bottle cap by injection molding according to claim 6, characterized in that: The demoulding assembly is composed of a plurality of demoulding mechanisms, wherein the demoulding mechanism comprises a guide block (27) fixedly mounted on the shaping rod (18), and a spiral groove (28) matching with the guide block (27) is formed on the side wall of the accommodating groove (17).

8. The method for preparing a bottle cap by injection molding according to claim 6, characterized in that: The chain transmission structure (33) is composed of a chain, a driving sprocket, a round rod (34) and a plurality of driven sprockets. The plurality of driven sprockets are respectively fixedly mounted on corresponding movable screw rods (21). The driving sprocket is rotatably mounted in the shaping plate (3) through the round rod (34). The chain is sleeved between the driving sprocket and the plurality of driven sprockets. A mounting cavity matching the chain transmission structure (33) is provided in the shaping plate (3), and a torsion spring (35) is installed between the mounting cavity and the driving sprocket. A convex rod (37) is installed at one end of the round rod (34) away from the driving sprocket through a one-way bearing (36). A circular hole is provided to match the convex rod (37), and a telescopic rod (39) is fixedly installed in the circular hole; a telescopic groove (38) is provided on the convex rod (37) to match the telescopic rod (39), and a spiral groove (40) is provided on the middle side wall of the telescopic groove (38); an annular groove (43) is provided on the side wall of one end of the spiral groove (40) close to the round rod (34); a guide groove (42) is provided on the side wall of the other end of the spiral groove (40); and a guide rod (41) matching the guide groove (42), the spiral groove (40) and the annular groove (43) is fixedly installed on the side wall of the telescopic rod (39).

9. The method for preparing a bottle cap by injection molding according to claim 6, characterized in that: The slotting assembly is composed of a plurality of slotting mechanisms, and the slotting mechanisms include a pull rod (23) slidably mounted on the shaping plate (3), and the pull rod (23) is slidably connected to the movable screw (21) and the pulling block, and one end of the pull rod (23) located in the shaping rod (18) is fixedly mounted with a connecting plate (24), and a plurality of connecting rods (25) are rotatably arranged on the side wall of the connecting plate (24) through a plurality of hinge seats (26), and a protrusion (20) is also rotatably mounted on the end of each connecting rod (25) away from the connecting plate (24), and a plurality of arc grooves (22) matching the corresponding protrusions (20) are provided on the side wall of the shaping rod (18), and a swing cavity matching the connecting plate (24), the pull rod (23) and the plurality of connecting rods (25) is provided in the shaping rod (18).

10. The method for preparing a bottle cap by injection molding according to claim 9, characterized in that: A plurality of fixed plates (29) are slidably mounted on the side wall of one end of the shaping plate (3) away from the injection molding plate (4), and each fixed plate (29) is fixedly connected to the corresponding plurality of pull rods (23), and a connecting rack (30) is fixedly mounted on the side wall of each fixed plate (29), and a plurality of driving racks (31) are fixedly mounted on the side wall of the injection molding plate (4). A plurality of connecting gears (32) are rotatably mounted on the side wall of the shaping plate (3), and each connecting gear (32) is respectively matched with the corresponding connecting rack (30) and the driving rack (31), and the connecting gear (32) is composed of a large gear and a small gear, and the small gear is meshed with the driving rack (31), and the large gear is meshed with the connecting gear (32).

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