A connected bottle cap injection mold and demolding method

Abstract

The application discloses a connected bottle cap injection mold and a demolding method, and relates to the technical field of injection molds, and can be used for injection molding of a connected bottle cap with an inner thread and an inner undercut. The connected bottle cap injection mold comprises a fixed mold and a movable mold, product cavities are arranged on the connecting end faces of the fixed mold and the movable mold; the fixed mold comprises a fixed base, a demolding top plate and a push plate, buckles are arranged on the two sides of the push plate; a mold core is arranged in the push plate, a slidable demolding sliding block is arranged on the mold core, the demolding sliding block can extend into the product cavities, a demolding shovel is arranged on the fixed base, a sliding clamping block is arranged on the demolding sliding block, a guide sliding groove is arranged on the side wall of the demolding shovel, the sliding clamping block is slidably clamped with the guide sliding groove, at least one inclined guide groove is arranged on the guide sliding groove, the demolding shovel can drive the demolding sliding block to slide on the mold core, and then drives the demolding sliding block to extend into or out of the product cavities.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an integrated bottle cap injection mold and a demolding method. Background Technology

[0002] Plastic bottle caps are widely used in bottled containers such as mineral water and beverages. A plastic bottle cap mainly consists of a cap body and a retaining ring. Before use, the cap body and retaining ring are connected together by multiple easy-break points. During use, the user rotates the cap body; when the torque is sufficient, the easy-break points will break, thus separating the cap body from the retaining ring. The user can then open the bottle cap by rotating it.

[0003] All the breakable points in existing plastic bottle caps are usually distributed within the same circumference. Therefore, when producing these types of plastic bottle caps, the cap body and the limiting ring are first injection molded as a whole, and then the breakable points are cut out between the cap body and the limiting ring using a ring cutting device. Figure 1-2 A novel plastic bottle cap is shown, in which the breakable points 300 between the cap body 100 and the limiting ring 200 are distributed on different circumferences, that is, there are obliquely distributed dividing grooves 400 between the cap body 100 and the limiting ring 200, and the inner sidewall of the cap body 100 is provided with internal threads 500, and both the inner sidewalls of the cap body 100 and the limiting ring 200 are provided with internal undercuts 600; obviously, the existing injection molding and ring cutting processing methods cannot meet the production requirements of this bottle cap; based on this, it is necessary to design an injection mold that can meet the processing requirements of this type of product. Summary of the Invention

[0004] To address some or all of the problems existing in the prior art, this invention provides a one-piece bottle cap injection mold, comprising a fixed mold and a movable mold, wherein the fixed mold and the movable mold are closable, and a product cavity is provided on the connecting end face of the fixed mold and the movable mold; the fixed mold includes a fixed base, a demolding top plate, and a push plate, wherein the demolding top plate and the push plate are slidably connected to the fixed base, and a fastening mechanism is provided on both sides of the push plate, which enables the demolding top plate to drive the push plate to move, and the fastening mechanism can also drive the push plate to disengage from the demolding top plate; The push plate contains a mold core, and the product cavity is located within the mold core. The mold core has a slidable demolding slider that can extend into the product cavity. The fixed base has a demolding scraper, and the demolding slider has a sliding engagement block. The side wall of the demolding scraper has a guide groove, and the sliding engagement block is slidably engaged with the guide groove. The guide groove has at least one section of inclined guide groove. The demolding scraper can drive the demolding slider to slide on the mold core, thereby causing the demolding slider to extend into or out of the product cavity.

[0005] As a further improvement of the present invention, the demolding top plate includes a first demolding template and a second demolding template. The first demolding template is disposed below the second demolding template. The first demolding template is provided with a product core that can extend into the product cavity. The second demolding template is provided with a demolding ejector rod that can extend into the product cavity. The first demolding template is provided with first magnetic elements on both sides. The second demolding template is provided with second magnetic elements at corresponding positions to the first magnetic elements. The first magnetic elements and the second magnetic elements are magnetically connected. The first demolding template is provided with a demolding limiting post. The other end of the demolding limiting post passes through the second demolding template, and the end of the demolding limiting post away from the first demolding template can abut against the fixing seat.

[0006] As a further improvement of the present invention, the inclined guide groove includes a first inclined guide groove and a second inclined guide groove, and the guide slide groove includes a first straight guide groove, a first inclined guide groove, a second straight guide groove and a second inclined guide groove connected in sequence.

[0007] In the mold-closed state, the sliding snap-fit ​​block engages with the first straight guide groove; during the demolding process, the sliding snap-fit ​​block will slide sequentially on the first straight guide groove, the first inclined guide groove, the second straight guide groove, and the second inclined guide groove until the sliding snap-fit ​​block disengages from the second inclined guide groove.

[0008] As a further improvement of the present invention, the fastening machine includes a pushing block and a resisting block. The pushing block is connected to the second ejector plate, and the resisting block is movably limited to the push plate. The end of the pushing block away from the second ejector plate can abut against the resisting block. Through the abutment between the pushing block and the resisting block, the second ejector plate can push the push plate to move synchronously.

[0009] As a further improvement of the present invention, a spring is provided on the push plate at a position corresponding to the push block, and the other end of the spring abuts against the push block. The spring is used to drive the push block to extend out of the push plate. A pressure block is provided on the fixed base, and the pressure block can abut against the push block.

[0010] In the mold-closed state, the pressure block and the push block are separated; during the demolding process, the push block will push the push block and the push plate to move away from the fixed seat. When the push block comes into contact with the pressure block, as the push block continues to move, the pressure block will push the push block back into the push plate and compress the spring, thereby causing the push block to separate from the push block.

[0011] As a further improvement of the present invention, one end of the pressing block is provided with a first pressing inclined surface, and the end face of the pushing block is provided with a second pressing inclined surface, wherein the first pressing inclined surface can abut against the second pressing inclined surface.

[0012] As a further improvement of the present invention, a positioning pin is provided on the upper end surface of the fixed base, and an insertion groove is provided on the push plate at the corresponding position of the positioning pin, wherein the positioning pin and the insertion groove are detachably inserted.

[0013] On the other hand, the present invention also provides a demolding method for a one-piece bottle cap formed by the above-mentioned injection mold, wherein the one-piece bottle cap includes a cap body and a limiting ring, and obliquely distributed partition grooves are provided at the connection between the cap body and the limiting ring. The demolding method includes the following steps:

[0014] S1: Drive the second ejector plate to move towards the product cavity. The second ejector plate drives the first ejector plate to move synchronously. The second ejector plate drives the push plate to move synchronously through the latching mechanism. The push plate drives the mold core and the ejector slider to move synchronously. The sliding locking block will slide in the first straight guide groove and the first inclined guide groove in sequence until the sliding locking block slides to the end of the first inclined guide groove. When the sliding locking block slides in the first inclined guide groove, it will drive the ejector slider to slide on the mold core, so that the ejector slider separates from the product in the product cavity. When the sliding locking block slides to the end of the first inclined guide groove, the ejector slider still retains part of itself in the partition groove.

[0015] S2: Continue driving the second ejector plate towards the product cavity. The first ejector plate cannot continue to move due to the abutment of the ejector limiting post and the fixed seat. The second ejector plate drives the push plate to move synchronously through the buckling mechanism. The push plate drives the mold core and the ejector slider to move synchronously. The ejector slider pushes the product to move synchronously, thereby separating the product from the product core in the product cavity and completing the product's internal undercut and internal thread demolding. During this process, the sliding snap block will slide in the second straight guide groove until the sliding snap block slides to the end of the second straight guide groove.

[0016] S3: Continue to drive the second ejector plate towards the product cavity. The second ejector plate drives the push plate to move synchronously through the buckle. The push plate drives the mold core and the ejector slider to move synchronously. The sliding latch block will slide in the second inclined guide groove until the sliding latch block slides to the end of the second inclined guide groove. When the sliding latch block slides in the second inclined guide groove, it will drive the ejector slider to slide on the mold core, so that the ejector slider completely disengages from the partition groove.

[0017] S4: Continue to drive the second ejector plate towards the product cavity. After the latch disengages, the second ejector plate can no longer drive the push plate. At this time, the ejector pin on the second ejector plate will extend into the product cavity and push the product out of the cavity, completing the product demolding.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention cleverly solves the demolding problem of inclined partition grooves by using a demolding spade with a special guide groove in conjunction with a demolding slider. Through a staged demolding top plate design (first and second demolding plates), the demolding of internal threads and internal undercuts, as well as the final product ejection, are solved sequentially. This allows one-piece bottle caps with inclined partition grooves, internal threads, and internal undercuts to be injection molded and demolded smoothly in a single mold, eliminating the need for subsequent secondary processing and greatly improving production efficiency and product consistency. The staged and smooth demolding method reduces stress concentration on weak parts of the product, lowering the risk of cracking and deformation. The rational mechanical structure avoids hard impacts and friction, which helps extend the service life of the mold. Attached Figure Description

[0020] To more clearly illustrate the solutions in this invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the external structure of the integrated bottle cap processed according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the integrated bottle cap processed according to an embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the mold in an embodiment of the present invention;

[0024] Figure 4 This is a top view of the fixed mold structure in an embodiment of the present invention;

[0025] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the middle AA section;

[0026] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure of the middle BB section;

[0027] Figure 7 This is a schematic diagram of the demolding slider and demolding shovel in an embodiment of the present invention;

[0028] Figure 8 This is a partial structural schematic diagram of the demolding shovel in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the buckle mechanism in an embodiment of the present invention. Detailed Implementation

[0030] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order.

[0031] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] like Figure 1-9 As shown, a one-piece bottle cap injection mold is used to mold one-piece bottle caps. The one-piece bottle cap includes a cap body 100 and a limiting ring 200, which are connected by a breakable point 300. All breakable points 300 of the one-piece bottle cap are distributed obliquely within a partition groove 400. The cap body 100 has an internal thread 500 on its inner side, and both the cap body 100 and the limiting ring 200 have internal undercuts 600 on their inner sides. The one-piece bottle cap injection mold includes a fixed mold 101 and a moving mold (not shown in the figure). During injection molding, the moving mold is mounted on the moving platen of the injection molding machine, and the fixed mold 101 is mounted on the fixed platen of the injection molding machine. The fixed mold 101 and the moving mold are connected by guide pillars and guide sleeves, and their closed end faces together form the product cavity 102 of the molded product.

[0034] The fixed mold 101 includes a fixed base 1, a demolding top plate 2, and a push plate 3. The fixed base 1 is used to fix the fixed mold 101 onto the injection molding machine. The demolding top plate 2 and the push plate 3 are slidably connected to the fixed base 1 by bolts or guide pillars, and can reciprocate along the mold opening direction. A latch 4 is symmetrically installed on both sides of the push plate 3. The latch 4 allows the demolding top plate 2 to drive the push plate 3 to move, and also allows the push plate 3 to disengage from the demolding top plate 2. A mold core 5 is embedded in the push plate 3, and a product cavity 102 is located on the end face of the mold core 5. A demolding slider 6, which can slide laterally (perpendicular to the mold opening direction), is installed on the mold core 5. The demolding slider 6 can extend into the product cavity 102. The front end shape of the demolding slider 6 matches the product's inclined partition groove 400 and easy breakage point 300, and is used to form the partition groove 400 and easy breakage point 300 during injection molding. A sliding latch block 61 is fixedly installed at the rear end of the demolding slider 6. A demolding scraper 7 is mounted on the fixed base 1. The demolding scraper 7 is positioned corresponding to the demolding slider 6. A guide groove 71 is provided on the side wall of the demolding scraper 7. The sliding locking block 61 is slidably locked in the guide groove 71. The guide groove 71 has at least one inclined guide groove. The demolding scraper 7 can drive the demolding slider 6 to slide on the mold core 5, thereby causing the demolding slider 6 to extend into or out of the product cavity 102.

[0035] During injection molding, the moving mold and fixed mold 101 are closed, and the ejector slider 6 extends into the product cavity 102 under the guidance of the ejector shovel 7. After injection molding, the injection molding machine drives the moving mold to open, leaving the product on the side of the fixed mold 101. Subsequently, the ejector roller of the injection molding machine drives the ejector plate 2 to eject. The ejector plate 2 drives the push plate 3 to move synchronously through the latch 4. The push plate 3 drives the mold core 5 and the product to move together. At the same time, the sliding locking block 61 slides in the guide groove 71. When the sliding locking block 61 passes through the inclined guide groove, the ejector slider 6 is driven to slide laterally, gradually exiting the product's partition groove 400, achieving inclined demolding. Then, the ejector roller of the injection molding machine drives the ejector plate 2 to move, completely ejecting the product from the fixed mold 101.

[0036] In this embodiment, each product cavity 102 is provided with four sets of demolding sliders 6 and demolding spade 7, and the four demolding sliders 6 are distributed in a circumferential array around the periphery of the product cavity 102; in other embodiments, each product cavity 102 may also be provided with any other number of demolding sliders 6.

[0037] In this embodiment, the demolding top plate 2 includes a first demolding template 21 and a second demolding template 22 stacked together. The first demolding template 21 is located below the second demolding template 22, and a product core 23 is fixed on the first demolding template 21. The end shape of the product core 23 matches the inner cavity, internal thread 500, and internal undercut 600 of the product. A demolding ejector rod 24 is installed on the second demolding template 22, which is used to eject the product out of the fixed mold 101 during the demolding process. The two sides of the first demolding template 21 are magnetically connected to the second magnetic element 26 on the second demolding template 22 through the first magnetic element 25, so that the two can move synchronously in the initial stage of demolding. The first demolding template 21 is also provided with a demolding limiting post 27, which passes through the through hole on the second demolding template 22 and its end can abut against the fixed base 1; it is used to limit the maximum stroke of the first demolding template 21 moving with the second demolding template 22. Specifically, in the initial stage of demolding, the injection molding machine ejector roller drives the second demolding platen 22 to move. The first magnetic component 25 and the second magnetic component 26 are magnetically connected, so the first demolding platen 21 can be driven to move synchronously. As the injection molding machine ejector roller continues to drive, when the demolding limiting post 27 abuts against the fixed seat 1, the first demolding platen 21 is restricted by the demolding limiting post 27, and the second demolding platen 22 can no longer drive the first demolding platen 21 to move synchronously. Then, the injection molding machine ejector roller drives the second demolding platen 22 to move, and the demolding ejector rod 24 can eject the product out of the product cavity 102, completing the product demolding.

[0038] The inclined guide groove includes a first inclined guide groove 712 and a second inclined guide groove 714. The guide slide 71 includes a first straight guide groove 711, a first inclined guide groove 712, a second straight guide groove 713, and a second inclined guide groove 714 connected in sequence. In the mold closing state, the sliding snap block 61 snaps into the first straight guide groove 711. During the demolding process, the sliding snap block 61 will slide sequentially on the first straight guide groove 711, the first inclined guide groove 712, the second straight guide groove 713, and the second inclined guide groove 714 until the sliding snap block 61 disengages from the second inclined guide groove 714.

[0039] There are two latching mechanisms 4, symmetrically distributed on both sides of the push plate 3. In other embodiments, the number of latching mechanisms 4 can be any other number, but at least one latching mechanism 4 must be provided on each of the left and right sides of the push plate 3. The latching mechanism 4 includes a pushing block 41 fixed to the side of the second ejector plate 22 and a pushing block 42 movably disposed on the push plate 3. The push plate 3 has a receiving hole in which the pushing block 42 is placed and a limiting screw allows the pushing block 42 to extend and retract slightly on the push plate 3. The end of the pushing block 41 can abut against the protruding end of the pushing block 42. Through the abutment between the pushing block 41 and the pushing block 42, the second ejector plate 22 can push the push plate 3 to move synchronously.

[0040] Specifically, a spring 43 is installed in the receiving hole of the push plate 3. One end of the spring 43 abuts against the side wall of the push plate 3, and the other end abuts against the push block 42. By setting the spring 43, a force that extends outward can always be applied to the push block 42. A pressure block 44 is installed on the fixed base 1. The pressure block 44 can abut against the push block 42. The position of the pressure block 44 is calculated so that when the push plate 3 moves and the demolding slider 6 completely disengages from the partition groove 400 of the product side wall, the pressure block 44 can just press the push block 42 into the push plate 3, thereby separating the push plate 3 from the second demolding template 22. In the mold-closed state, the pressure block 44 separates from the push block 42. During the demolding process, the push block 41 pushes the push block 42 and the push plate 3 to move away from the fixed base 1. When the push block 42 comes into contact with the pressure block 44, as the push block 42 continues to move, the pressure block 44 pushes the push block 42 back into the push plate 3 and compresses the spring 43, thereby causing the push block 41 to separate from the push block 42. After that, the movement of the second demolding plate 22 can no longer drive the push plate 3 to continue moving.

[0041] Preferably, the end of the pressing block 44 is machined with a first pressing bevel 45, and the corresponding end of the pushing block 42 is machined with a second pressing bevel 46. When the two come into contact, the pressing block 44 can smoothly press the pushing block 42 into the push plate 3 through the bevel engagement.

[0042] To further ensure mold closing accuracy, a positioning pin 8 is provided on the upper surface of the fixed base 1, and an insertion slot 31 is opened at the corresponding position of the push plate 3; when the mold is closed, the positioning pin 8 is inserted into the insertion slot 31 to ensure accurate resetting of the push plate 3 and the mold core 5.

[0043] The process of forming the injection mold using the above-mentioned integrated bottle cap injection mold is as follows:

[0044] First, the fixed mold 101 and the moving mold are installed on the fixed template and the moving template of the injection molding machine, respectively. During processing, the moving mold is driven by the injection molding machine to close with the fixed mold 101, completing the mold closing. Then, the injection molding machine's feeding system injects rubber into the mold, and the rubber flows into the product cavity 102. After cooling, the product is injection molded in the product cavity 102. Then, the moving mold is driven by the injection molding machine to separate from the fixed mold 101, completing the mold opening. The product stays on the side of the fixed mold 101. Then, the second ejector plate 22 is driven by the ejector roller of the injection molding machine to move towards the product cavity 102. The second ejector plate 22 will successively drive the first ejector plate 21 and the push plate 3 to move, thereby ejecting the product out of the fixed mold 101 and completing the automatic demolding of the product.

[0045] The specific steps of the product demolding process on the fixed mold side are as follows:

[0046] S1: First-stage demolding (initial demolding from the inclined partition groove 400). The injection molding machine ejector roller drives the second demolding platen 22 to move towards the product cavity 102. Due to magnetic attraction, the first demolding platen 21 moves synchronously. At the same time, the push block 41 pushes the push block 42, causing the push plate 3, mold core 5, demolding slider 6, and the product remaining on the mold core 5 to move together. At this time, the sliding locking block 61 slides sequentially in the first straight guide groove 711 and the first inclined guide groove 712, sliding from the first straight guide groove 711 into the first inclined guide groove 712 until the sliding locking block 61 slides to the end of the first inclined guide groove 712. When the sliding locking block 61 slides in the first inclined guide groove 712, guided by the first inclined guide groove 712, the demolding slider 6 slides laterally on the mold core 5, causing the demolding slider 6 to exit from the inclined partition groove 400 of the product. When the sliding latch block 61 reaches the end of the first inclined guide groove 712, the demolding slider 6 has mostly withdrawn, but a small part remains in the inclined partition groove 400 to act as a limit, so that the demolding slider 6 can eject the product from the product core 23 in subsequent steps.

[0047] In step S1 above, the product core 23 remains inside the product. The reason for first removing part of the demolding slider 6 from the inclined partition groove 400 is to allow for product deformation allowance in the subsequent steps when forcibly removing the product's internal undercut 600 and internal thread 500, to avoid squeezing the demolding slider 6 when the product deforms during the removal of the undercut and thread, to ensure that the mold produces qualified one-piece bottle cap products, and to extend the service life of the demolding slider 6.

[0048] S2: Second stage demolding (demolding of internal thread 500 and internal undercut 600). The injection molding machine ejector continues to drive the second demolding platen 22 towards the product cavity 102. At this time, the end of the demolding limit post 27 on the first demolding platen 21 is already locked against the fixed seat 1, and the first demolding platen 21 and the product core 23 stop moving. The second demolding platen 22 continues to drive the push plate 3, mold core 5, demolding slider 6 and the product to move synchronously through the clamping mechanism 4. Since the product core 23 is stationary while the product moves with the mold core 5, the product and the product core 23 undergo relative displacement, thereby allowing the product to smoothly detach from the product core 23, completing the demolding of internal thread 500 and internal undercut 600. During this process, the sliding locking block 61 slides in the second straight guide groove 713, and the position of the demolding slider 6 remains unchanged (i.e., the relative position with the product partition groove 400 remains unchanged). After this step is completed, the sliding locking block 61 slides exactly to the end of the second straight guide groove 713.

[0049] S3: Third-stage demolding (complete demolding from the inclined partition groove 400). The injection molding machine ejector continues to drive the second demolding platen 22 towards the product cavity 102. The second demolding platen 22 continues to drive the push plate 3, mold core 5, demolding slider 6, and product to move synchronously via the latch 4. The sliding latch block 61 slides into the second inclined guide groove 714. Guided by the second inclined guide groove 714, the demolding slider 6 completes its final lateral sliding on the mold core 5, completely and thoroughly exiting the inclined partition groove 400 of the product. This continues until the sliding latch block 61 slides to the end of the second inclined guide groove 714 or completely slides out of the second inclined guide groove 714.

[0050] During step S3, the pressing block 44 on the buckle 4 will abut against the pushing block 42 and press the pushing block 42 into the push plate 3. When step S3 is completed, the pushing block 42 is completely pressed into the push plate 3 by the pressing block 44. At this time, the buckle 4 opens, causing the pushing block 41 to separate from the pushing block 42, that is, the second ejector plate 22 separates from the push plate 3.

[0051] S4: Fourth stage demolding (final product ejection). The injection molding machine ejector roller continues to drive the second demolding platen 22 towards the product cavity 102. At this time, the push block 41 and the push block 42 disengage; the second demolding platen 22 disengages from the push plate 3, and the push plate 3 stops moving. The second demolding platen 22 moves independently, and the demolding ejector rod 24 extends forward, passes through the clearance hole on the stopped mold core 5, and acts directly on the product, smoothly ejecting the product, which has completely detached from all mold forming components (mold core 5, mold core, slider), out of the mold core 5, completing the product demolding.

[0052] The specific embodiments described above are preferred embodiments of the present invention and are not intended to limit the specific scope of the present invention. The scope of the present invention includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A one-piece bottle cap injection mold, characterized in that: It includes a fixed mold and a moving mold, which are closable and connected, and the connecting end faces of the fixed mold and the moving mold are provided with product cavities; The fixed mold includes a fixed base, a demolding top plate, and a push plate. The demolding top plate and the push plate are slidably connected to the fixed base. Each side of the push plate is provided with a fastening mechanism, which enables the demolding top plate to drive the push plate to move. The fastening mechanism can also drive the push plate to detach from the demolding top plate. The push plate is provided with a mold core, the product cavity is set in the mold core, the mold core is provided with a slidable demolding slider, the demolding slider can extend into the product cavity, the fixed base is provided with a demolding scraper, the demolding slider is provided with a sliding locking block, the side wall of the demolding scraper is provided with a guide groove, the sliding locking block is slidably locked with the guide groove, the guide groove is provided with at least one section of inclined guide groove, the demolding scraper can drive the demolding slider to slide on the mold core, thereby driving the demolding slider to extend into or out of the product cavity; The demolding top plate includes a first demolding template and a second demolding template. The first demolding template is located below the second demolding template and has a product core that can extend into the product cavity. The second demolding template has a demolding ejector rod that can extend into the product cavity. The first demolding template has first magnetic elements on both sides and a second magnetic element on the second demolding template at a corresponding position. The first magnetic elements and the second magnetic elements are magnetically connected. The first demolding template has a demolding limiting post, the other end of which passes through the second demolding template, and the end of the demolding limiting post away from the first demolding template can abut against the fixing seat. The inclined guide groove includes a first inclined guide groove and a second inclined guide groove, and the guide slide groove includes a first straight guide groove, a first inclined guide groove, a second straight guide groove and a second inclined guide groove connected in sequence. In the mold-closed state, the sliding latch block engages with the first straight guide groove; during the demolding process, the sliding latch block will slide sequentially on the first straight guide groove, the first inclined guide groove, the second straight guide groove, and the second inclined guide groove until the sliding latch block disengages from the second inclined guide groove. The fastening machine includes a pushing block and a pushing block. The pushing block is connected to the second stripping template, and the pushing block is movably limited to the push plate. The end of the pushing block away from the second stripping template can abut against the pushing block. By pushing the block and abutting the push block, the second ejector plate can push the push plate to move synchronously. A spring is provided on the push plate at a position corresponding to the push block, and the other end of the spring abuts against the push block. The spring is used to drive the push block to extend out of the push plate. A pressure block is provided on the fixed base, and the pressure block can abut against the push block.

2. The injection mold for an integral bottle cap according to claim 1, characterized in that: In the mold-closed state, the pressure block and the push block are separated; during the demolding process, the push block will push the push block and the push plate to move away from the fixed seat. When the push block comes into contact with the pressure block, as the push block continues to move, the pressure block will push the push block back into the push plate and compress the spring, thereby causing the push block to separate from the push block.

3. The injection mold for an integral bottle cap according to claim 2, characterized in that: One end of the pressing block is provided with a first pressing inclined surface, and the end face of the pushing block is provided with a second pressing inclined surface, wherein the first pressing inclined surface can abut against the second pressing inclined surface.

4. The injection mold for an integral bottle cap according to any one of claims 1-3, characterized in that: The upper surface of the fixed base is provided with a positioning pin, and the push plate is provided with a insertion groove at the corresponding position of the positioning pin. The positioning pin and the insertion groove are detachably inserted into each other.

5. A demolding method for a one-piece bottle cap formed by injection molding according to any one of claims 2-4, wherein the one-piece bottle cap includes a cap body and a limiting ring, and obliquely distributed partition grooves are provided at the connection between the cap body and the limiting ring, characterized in that, The demolding method includes the following steps: S1: Drive the second ejector plate to move towards the product cavity. The second ejector plate drives the first ejector plate to move synchronously. The second ejector plate drives the push plate to move synchronously through the latching mechanism. The push plate drives the mold core and the ejector slider to move synchronously. The sliding locking block will slide in the first straight guide groove and the first inclined guide groove in sequence until the sliding locking block slides to the end of the first inclined guide groove. When the sliding locking block slides in the first inclined guide groove, it will drive the ejector slider to slide on the mold core, so that the ejector slider separates from the product in the product cavity. When the sliding locking block slides to the end of the first inclined guide groove, the ejector slider still retains part of itself in the partition groove. S2: Continue driving the second ejector plate towards the product cavity. The first ejector plate cannot continue to move due to the abutment of the ejector limiting post and the fixed seat. The second ejector plate drives the push plate to move synchronously through the buckling mechanism. The push plate drives the mold core and the ejector slider to move synchronously. The ejector slider pushes the product to move synchronously, thereby separating the product from the product core in the product cavity and completing the product's internal undercut and internal thread demolding. During this process, the sliding snap block will slide in the second straight guide groove until the sliding snap block slides to the end of the second straight guide groove. S3: Continue to drive the second ejector plate towards the product cavity. The second ejector plate drives the push plate to move synchronously through the buckle. The push plate drives the mold core and the ejector slider to move synchronously. The sliding latch block will slide in the second inclined guide groove until the sliding latch block slides to the end of the second inclined guide groove. When the sliding latch block slides in the second inclined guide groove, it will drive the ejector slider to slide on the mold core, so that the ejector slider completely disengages from the partition groove. S4: Continue to drive the second ejector plate towards the product cavity. After the latch disengages, the second ejector plate can no longer drive the push plate. At this time, the ejector pin on the second ejector plate will extend into the product cavity and push the product out of the cavity, completing the product demolding.

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