An inner thread demolding mechanism for a fabric softener cap injection mold.

Abstract

This invention proposes a demolding mechanism for the inner thread of a fabric softener cap injection mold, comprising a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a first insert fixing plate, a fixed template, etc., with multiple fixed mold inserts passing through the fixed template connected to the first insert fixing plate. The moving mold assembly includes a second insert fixing plate, a moving template, etc., with multiple moving mold inserts connected to the second insert fixing plate. When the mold is closed, a mold cavity for cap forming is formed between the moving template, the fixed template, the fixed mold inserts, and the moving mold inserts. A first demolding component is provided within the fixed mold assembly. This application achieves rotational demolding of the inner thread of the filling cap through the first demolding component. During the mold opening process, the second forming insert is pulled down and rotates relative to the first forming insert, using rotational inertia to naturally detach the inner thread of the cap from the mold, avoiding the cap deformation problem caused by direct pulling in traditional injection molds, thereby significantly improving the product's appearance quality and performance.

Description

[Technical Field]

[0002] This invention relates to the field of injection mold technology, and in particular to an inner ring thread demolding mechanism for an injection mold of a fabric softener cap. [Background Technology]

[0004] With the widespread use of plastic products in daily life, injection molding technology has become one of the main processes for manufacturing plastic products due to its high efficiency, flexibility, and low cost. Fabric softener caps, as a common type of plastic product, typically include an inner thread and an outer thread (see...). Figures 10 to 11 These are used for sealing connections with the protective cap and the fabric softener bottle, respectively. However, due to the complex threaded structure of the fabric softener pouring cap, the following problems often arise during the demolding process of traditional injection molds:

[0005] First, traditional injection molds typically remove the molded cap from the mold by directly pulling it out. Because the cap's internal and external threads fit tightly with the mold inserts, forced pulling can easily cause deformation, affecting the product's appearance and performance. Second, the threaded section is a critical functional area for the fabric softener cap; its precision and integrity directly impact the product's sealing and assembly performance. However, traditional demolding methods can easily damage the thread surface due to friction or jamming during thread separation, even leading to breakage and reduced product quality. Furthermore, the demolding process of traditional injection molds usually requires manual intervention, such as manually adjusting mold components or addressing jamming issues. This not only increases the workload of operators but also prolongs the production cycle and reduces overall production efficiency. In addition, frequent friction and jamming accelerate the wear of mold components, shortening the mold's lifespan and increasing maintenance and replacement costs.

[0006] To address the aforementioned problems, several improvements have been proposed in the prior art. For example, some thread molds employ a rotary demolding mechanism, which drives the threaded insert to rotate, gradually disengaging the thread from the cover. These improvements reduce the risk of thread damage to some extent. However, the rotary mechanisms of existing thread molds are highly complex, typically requiring complex mechanical transmission components (such as gear sets, chains, hydraulic or pneumatic drives) to achieve the rotational movement of the threaded insert. The design and manufacturing of these components demand high precision and require accurate fit. Synchronization between the drive and driven mechanisms is difficult to guarantee, easily leading to jamming or misalignment. [Summary of the Invention]

[0008] The purpose of this invention is to provide an injection mold demolding mechanism that can efficiently and non-destructively demold the inner ring thread of a fabric softener pouring cap, aiming to solve the problems of easy deformation and thread damage during demolding of fabric softener pouring caps during injection molding in the prior art.

[0009] This invention is achieved through the following technical solutions:

[0010] A demolding mechanism for the inner thread of a fabric softener cap injection mold includes a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a fixed mold base plate, a hot runner plate, a first insert fixing plate, and a fixed template connected from top to bottom. The first insert fixing plate is connected to a plurality of fixed mold inserts passing through the fixed template. The moving mold assembly includes a moving mold base plate, a second insert fixing plate, an ejector plate, a support plate, a push plate, and a moving template connected from bottom to top. The second insert fixing plate is connected to a plurality of moving mold inserts passing through the ejector plate, the push plate, and the moving template. When the mold is closed, a mold cavity for forming the cap is formed between the moving template, the fixed template, the fixed mold inserts, and the moving mold inserts. The fixed mold assembly is provided with a first demolding component that can be movably connected to and cooperate with the fixed mold inserts to demold the inner thread of the cap.

[0011] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes a fixed mold insert with one end fixedly connected to the first insert fixing plate, the other end of the first molding insert can pass through the fixed mold plate, and a second molding insert is movably connected to the outer periphery of the first molding insert. The lower part of the second molding insert is provided with a first thread groove for forming the inner ring thread of the cap.

[0012] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes a first demolding component comprising a movable plate movably disposed within a first insert fixing plate. The movable plate is fixed with a plurality of bearing assemblies corresponding to each of the fixed mold inserts. The bearing assemblies are fitted with a second molding insert, which penetrates the movable plate. When the mold is opened, the inner ring thread of the cap pulls the second molding insert down and rotates relative to the first molding insert until the second molding insert separates from the cap due to rotational inertia.

[0013] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes a bearing assembly comprising a first bearing and a second bearing sleeved on the outer periphery of the second molding insert. The outer periphery of the second molding insert is provided with a limiting protrusion, which is clamped between the first bearing and the second bearing.

[0014] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes an upper floating plate, a lower floating plate fixedly connected to the bottom of the upper floating plate, a first bearing fixedly disposed in the upper floating plate, and a second bearing fixedly disposed in the lower floating plate.

[0015] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes a first demolding component comprising a pusher device disposed on the upper part of the movable plate. When the mold is opened, the pusher device causes the movable plate to tend to move away from the fixed mold base plate.

[0016] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes a plurality of first elastic elements evenly arranged on both sides of the upper part of the movable plate. The upper part of the movable plate and the lower part of the fixed mold base plate are respectively provided with a first mounting groove and a second mounting groove. The first elastic elements pass through the hot runner plate and the first insert fixing plate, and their two ends are respectively provided in the first mounting groove and the second mounting groove.

[0017] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold has a reset device at the lower part of the movable plate. When the mold is closed, the reset device moves the movable plate away from the moving mold assembly. When the movable plate is reset, its upper end abuts against the first insert fixing plate.

[0018] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold includes a reset device comprising multiple return rods evenly arranged on the lower part of the movable plate. The fixed plate has multiple through holes corresponding to the return rods and allowing them to pass through. When the mold is closed, the lower end of the return rod abuts against the upper end of the movable plate.

[0019] As described above, the inner ring thread demolding mechanism of a fabric softener cap injection mold has multiple guide mechanisms between the fixed mold assembly and the moving mold assembly for limiting the mold opening and closing stroke.

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

[0021] 1. This application achieves rotational demolding of the inner ring thread of the liquid discharge cap through a first demolding component. During the mold opening process, the second molding insert is pulled down and rotates relative to the first molding insert. The rotational inertia causes the inner ring thread of the cap to naturally detach from the mold, avoiding the deformation problem of the cap caused by direct pulling in traditional injection molds, thereby significantly improving the appearance quality and performance of the product.

[0022] 2. This application uses a bearing assembly design to fit the first bearing and the second bearing onto the outer periphery of the second molding insert, and fixes their positions with limiting protrusions, effectively reducing friction. At the same time, the booster device provides smooth power for the demolding process, reduces wear on the thread surface, and ensures the accuracy and integrity of the thread, thereby improving the sealing performance and assembly performance of the product.

[0023] 3. Existing rotary demolding mechanisms typically rely on complex mechanical transmission components, resulting in complex structures and high maintenance costs. This application utilizes the rotational inertia generated by the tension and threaded engagement of the liquid-filling cap during mold opening to achieve adaptive rotary demolding, eliminating the need for an additional power source. Simultaneously, the reset device automatically resets the movable plate, significantly simplifying the demolding mechanism design, reducing manual intervention, and substantially improving production efficiency while lowering maintenance costs. [Attached Image Description]

[0025] To more clearly illustrate the technical solutions in the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0026] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0027] Figure 2 This is a top view of this embodiment;

[0028] Figure 3 for Figure 2 A cross-sectional view along line AA;

[0029] Figure 4 for Figure 2 A cross-sectional view along line BB;

[0030] Figure 5 for Figure 2 A cross-sectional view along line CC;

[0031] Figure 6 for Figure 2 A cross-sectional view along line DD;

[0032] Figure 7 for Figure 2 A cross-sectional view along line EE;

[0033] Figure 8 for Figure 5 Enlarged view of point F in the middle;

[0034] Figure 9 This is a schematic diagram of the internal three-dimensional structure of this embodiment;

[0035] Figure 10 A schematic diagram of the fabric softener pouring cap corresponding to the production application of this embodiment;

[0036] Figure 11 This is a cross-sectional schematic diagram of the fabric softener pouring cap corresponding to the production application of this embodiment.

Detailed Implementation Methods

[0038] To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0039] Fabric softener dispenser caps are a common type of plastic product; please refer to [reference needed]. Figures 10 to 11 Its structure typically includes an inner thread and an outer thread. The outer thread is used for a sealing connection with the fabric softener bottle, while the inner thread is used for connection with an additional protective cap. For the injection molding of the aforementioned fabric softener pouring cap, traditional injection molds often suffer from product deformation and thread damage during demolding due to the complexity of the cap's thread structure, affecting product quality and production efficiency. To solve these problems, this embodiment proposes a demolding mechanism for an injection mold of a fabric softener pouring cap, achieving efficient and non-destructive demolding of the inner and outer threads of the cap.

[0040] Please see Figures 1 to 9 A demolding mechanism for an injection mold of a fabric softener pouring cap includes a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a fixed mold base plate 1, a hot runner plate 2, a first insert fixing plate 3, and a fixed mold plate 4 connected sequentially from top to bottom. The first insert fixing plate 3 is connected to a plurality of fixed mold inserts 5 passing through the fixed mold plate 4. The moving mold assembly includes a moving mold base plate 6, a second insert fixing plate 7, an ejector plate 8, a support plate 9, a push plate 10, and a moving mold plate 11 connected sequentially from bottom to top. The second insert fixing plate 7 is connected to a plurality of fixed mold inserts 5 passing through the mold plate 4. The ejector plate 8, push plate 10, and moving mold insert 12 of moving mold plate 11 are described. When the mold is closed, a mold cavity 13 for forming the cover body is formed between the moving mold plate 11, the fixed mold plate 4, the fixed mold insert 5, and the moving mold insert 12. The fixed mold assembly is provided with a first demolding assembly 14 that can be movably connected to the fixed mold insert 5 and cooperate to demold the inner ring thread of the cover body. The moving mold assembly and the fixed mold assembly are provided with a second demolding assembly 15 that can be movably connected to the moving mold insert 12 and cooperate to demold the outer ring thread of the cover body.

[0041] In this embodiment, the fixed mold assembly includes, from top to bottom, a fixed mold base plate 1, a hot runner plate 2, a first insert fixing plate 3, and a fixed mold plate 4. The first insert fixing plate 3 is connected to multiple fixed mold inserts 5 that pass through the fixed mold plate 4; these fixed mold inserts 5 are used to form the inner threaded portion of the cover. The moving mold assembly includes, from bottom to top, a moving mold base plate 6, a second insert fixing plate 7, an ejector plate 8, a support plate 9, a push plate 10, and a moving mold plate 11. The second insert fixing plate 7 is connected to multiple moving mold inserts 12 that pass through the ejector plate 8, the push plate 10, and the moving mold plate 11; these moving mold inserts 12 are used to form the outer threaded portion and other non-threaded portions of the cover. When the mold is closed, the moving mold plate 11, the fixed mold plate 4, the fixed mold inserts 5, and the moving mold inserts 12 fit together tightly to form a mold cavity 13 for forming the cover.

[0042] The fixed mold assembly includes a first demolding component 14, which is movably connected to the fixed mold insert 5. During demolding, the first demolding component 14 can move relative to the fixed mold insert 5, thereby smoothly demolding the inner threaded portion of the cap. This design avoids thread damage caused by directly pulling the cap. Correspondingly, a second demolding component 15 is provided between the moving mold assembly and the fixed mold assembly, and the second demolding component 15 is also movably connected to the moving mold insert 12. During demolding, the second demolding component 15 can move relative to the moving mold insert 12, thereby smoothly demolding the outer threaded portion of the cap. Similarly, this design also avoids thread damage. Through the coordinated action of the first and second demolding components, efficient demolding of the inner and outer threads of the fabric softener pouring cap is achieved, greatly improving production efficiency.

[0043] Furthermore, as a preferred embodiment of this solution and not a limitation, the fixed mold insert 5 includes a first molding insert 51 with one end fixedly connected to the first insert fixing plate 3, the other end of the first molding insert 51 can pass through the fixed mold plate 4, and a second molding insert 52 is rotatably connected to the outer periphery of the first molding insert 51. The lower part of the second molding insert 52 is provided with a first thread groove 521 for forming the inner ring thread of the cover.

[0044] In this embodiment, the first molding insert 51 is the main body of the fixed mold insert 5. One end of the first molding insert 51 is fixedly connected to the first insert fixing plate 3 by fasteners or other connection methods to ensure stable position during injection molding. The other end of the first molding insert 51 is designed to pass through the fixed mold plate 4 so that it can cooperate with the moving mold insert 12 to form the mold cavity 13 when the mold is closed. The second molding insert 52 is movably connected to the first molding insert 51. More specifically, the upper part of the first molding insert 51 is designed as a screw structure, while the second molding insert 52 has a matching screw sleeve structure. This design allows the second molding insert 52 to move spirally up and down relative to the first molding insert 51.

[0045] At the lower part of the second molding insert 52, a first threaded groove 521 is provided for forming the inner ring thread of the cap. The size and shape of these threaded grooves 521 must match the inner ring thread design of the fabric softener pouring cap to ensure the thread accuracy and integrity after injection molding. During the injection molding process, molten plastic is injected into the mold cavity 13 formed by the moving mold assembly and the fixed mold assembly. At this time, the second molding insert 52 and the first molding insert 51 fit tightly together to form the forming part of the inner ring thread of the cap. After injection molding is completed, the mold begins to open. At this time, the first demolding assembly 14 begins to act, which can be a drive mechanism such as a cylinder or hydraulic cylinder connected to the second molding insert 52. The drive mechanism propels the second molding insert 52 in a spiral lifting motion relative to the first molding insert 51, thereby gradually loosening the connection with the inner threaded portion of the molded cap. As the second molding insert 52 spirals up and down, the inner threaded portion of the cap is smoothly demolded. Simultaneously, the second demolding component 15 in the moving mold assembly also begins to function, pushing the moving mold insert 12 to move relative to the outer threaded portion of the cap, achieving demolding of the outer thread. Finally, when the mold is fully opened, the molded fabric softener pouring cap can be removed from the mold. The spiral connection structure between the second molding insert 52 and the first molding insert 51 allows the demolding mechanism in this embodiment to more smoothly and evenly separate the inner and outer threaded portions of the cap, reducing potential damage and deformation during demolding and improving product quality.

[0046] Furthermore, as a preferred embodiment of this solution and not a limitation, the first demolding assembly 14 includes a movable plate 141 movably disposed within the first insert fixing plate 3. A plurality of bearing assemblies 142 corresponding to each of the fixed mold inserts 5 are fixed within the movable plate 141. The bearing assemblies 142 are fitted with the second molding insert 52, which penetrates the movable plate 141. When the mold opens, the inner ring thread of the cover body pulls the second molding insert 52 down and rotates it relative to the first molding insert 51 until the second molding insert 52 disengages from the cover body due to rotational inertia.

[0047] In this embodiment, the first insert fixing plate 3 has a movable space within which the movable plate 141 can be raised and lowered, providing space and a foundation for subsequent demolding actions, enabling the demolding mechanism to flexibly perform its functions. Multiple bearing assemblies 142 are fixedly installed within the movable plate 141, and these bearing assemblies 142 correspond one-to-one with each fixed mold insert 5. Each bearing assembly 142 can consist of one or more bearings, and its main function is to reduce friction and ensure smooth rotation of the second molding insert 52. This one-to-one correspondence design ensures that the second molding insert 52 corresponding to each fixed mold insert 5 receives stable support and good rotation conditions, which is beneficial to improving the stability and reliability of the entire demolding process. Each bearing assembly 142 is fitted with a corresponding second molding insert 52, and the second molding insert 52 penetrates the movable plate 141. This type of connection, which involves both securing and penetrating, allows the second molded insert 52 to form an organic whole with the bearing assembly 142 and the movable plate 141. More specifically, the bearing assembly 142 provides rotational support for the second molded insert 52, while the movable plate 141 restricts the direction of movement of the second molded insert 52 to a certain extent, ensuring that it performs pull-down and rotational actions on a specific trajectory.

[0048] When the mold begins to open, the fixed mold assembly and the moving mold assembly gradually separate. Since the inner thread of the cover is formed by the first thread groove 521 on the second molding insert 52 during the injection molding process, the cover and the second molding insert 52 are tightly fitted. At this time, the movement of the cover will cause the mating second molding insert 52 to tend to pull downwards. During the process of the cover pulling the second molding insert 52 downwards, since the second molding insert 52 is rotatably connected to the first molding insert 51, and the helical shape of the inner thread determines that rotational motion will inevitably occur during the downward pull. The presence of the bearing assembly 142 greatly reduces the frictional force when the second molding insert 52 rotates, allowing the second molding insert 52 to rotate smoothly relative to the first molding insert 51. As the mold opening action continues, the second molding insert 52 continuously pulls down and rotates. When a certain degree is reached, utilizing rotational inertia, the second molding insert 52 will disengage from the cover, thus completing the demolding process of the inner thread of the cover. Rotational inertia plays a crucial role here, helping the second molding insert 52 to completely disengage from the inner threads of the cover, preventing jamming between threads and ensuring smooth demolding. This first demolding assembly, through the coordinated work of the movable plate 141, bearing assembly 142, and the second molding insert 52, cleverly utilizes the movement of the cover during mold opening to achieve automatic demolding of the inner threads of the cover. This design not only improves demolding efficiency and reduces manual intervention but also effectively avoids demolding damage caused by improper manual operation, ensuring product quality and production stability.

[0049] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the bearing assembly 142 includes a first bearing 1421 and a second bearing 1422 sleeved on the outer periphery of the second molded insert 52. The outer periphery of the second molded insert 52 is provided with a limiting protrusion 522, which is sandwiched between the planar bearing and the deep groove bearing.

[0050] Preferably, the first bearing 1421 is a planar bearing, sleeved on the outer periphery of the second molding insert 52. The planar bearing primarily bears axial loads to accommodate the axial tension that may be generated during the demolding process of the second molding insert 52, ensuring stable movement of the second molding insert 52 in the axial direction. During the process of the cover pulling the second molding insert 52 down, the planar bearing can effectively support and guide this axial movement, reducing axial friction and wobbling.

[0051] Preferably, the second bearing 1422 is a deep groove bearing, which is also fitted onto the outer periphery of the second molded insert 52. The deep groove bearing is mainly used to bear radial loads, and can also bear a certain axial load. When the second molded insert 52 rotates relative to the first molded insert 51, the deep groove bearing can ensure its stability in the radial direction, making the rotation smoother, reducing the offset and jamming caused by radial force, and ensuring that the second molded insert 52 can rotate accurately along the predetermined trajectory.

[0052] In this embodiment, the limiting protrusion 522 precisely defines the relative positions of the planar bearing and the deep groove bearing. It prevents axial movement of the planar bearing and deep groove bearing during the movement of the second molded insert 52, ensuring that the two bearings always maintain the correct relative position, thereby guaranteeing the stability and reliability of the entire bearing assembly. Simultaneously, the limiting protrusion 522 can also share the axial and radial loads to a certain extent, further enhancing the stability of the movement of the second molded insert 52. This bearing assembly structure, composed of the planar bearing, deep groove bearing, and limiting protrusion 522, provides comprehensive support and stable movement conditions for the second molded insert 52. During the demolding process of the inner thread of the cover, it can effectively withstand the axial downward force, ensuring the smooth downward pull of the second molded insert 52, and also ensure its radial stability during rotation, allowing the second molded insert 52 to rotate flexibly and smoothly relative to the first molded insert 51.

[0053] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the movable plate 141 includes an upper floating plate 1411, a lower floating plate 1412 fixedly connected to the bottom of the upper floating plate 1411, the planar bearing 1421 fixedly disposed inside the upper floating plate 1411, and the deep groove bearing 1422 fixedly disposed inside the lower floating plate 1412.

[0054] In this embodiment, the movable plate adopts a layered design, consisting of an upper floating plate 1411 and a lower floating plate 1412. The upper floating plate 1411 is located at the top, and the lower floating plate 1412 is fixedly connected to its bottom. This layered design makes it more convenient to install and maintain the bearings. If a bearing malfunctions, such as wear or damage, only the corresponding upper or lower floating plate needs to be operated, without the need for large-scale disassembly of the entire movable plate, reducing maintenance difficulty and cost.

[0055] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the first demolding assembly 14 includes a pusher device 143 disposed on the upper part of the movable plate 141. When the mold is opened, the pusher device 143 causes the movable plate 141 to tend to move away from the fixed mold base plate 1.

[0056] In this embodiment, the booster device 143 is a key component located on the upper part of the movable plate 141. Its main function is to provide a thrust to the movable plate 141 away from the fixed mold base plate 1 when the mold is opened, which helps to accelerate the separation process of the movable plate 141 and the second molding insert 52 on it from the cover, thereby improving demolding efficiency and reliability.

[0057] Specifically, the booster device 143 may be one or more cylinders, hydraulic cylinders, springs, or other mechanical devices capable of providing thrust. These devices are precisely mounted on the upper part of the movable plate 141, and the booster device 143 rapidly generates thrust, pushing the movable plate 141 and the second molding insert 52 thereon downward and away from the fixed mold base plate 1.

[0058] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the booster device 143 includes a plurality of first elastic members 1431 evenly disposed on both sides of the upper part of the movable plate 141. The upper part of the movable plate 141 and the lower part of the fixed mold base plate 1 are respectively provided with a first mounting groove 1432 and a second mounting groove 1433. The first elastic member 1431 passes through the hot runner plate 2 and the first insert fixing plate 3, and its two ends are respectively disposed in the first mounting groove 1432 and the second mounting groove 1433.

[0059] In this embodiment, the first elastic element 1431 is the core component of the booster device 143, used to provide a thrust to the movable plate 141 away from the fixed mold base plate 1. The first elastic element 1431 is preferably a spring, which can provide a stable thrust and is easy to install and maintain. The first mounting groove 1432 is a slot provided on the upper part of the movable plate 141 for mounting one end of the first elastic element 1431. These grooves match the shape and size of the first elastic element 1431 to ensure that the first elastic element 1431 can be firmly mounted on the movable plate 141. Similarly, the second mounting groove 1433 is a slot provided on the lower part of the fixed mold base plate 1 for mounting the other end of the first elastic element 1431. Similar to the first mounting groove 1432, these grooves also match the shape and size of the first elastic element 1431. When the mold is in the closed state, the first elastic element 1431 is compressed and stores energy. When the mold is opened, the first elastic element 1431 releases the stored energy, pushing the movable plate 141 downward, thereby accelerating the demolding process.

[0060] To ensure that the first elastic element 1431 can smoothly pass through the various components of the mold, the hot runner plate 2 and the first insert fixing plate 3 are also designed with corresponding through holes or channels. The size and position of these through holes or channels need to match the first elastic element 1431 to ensure that the first elastic element 1431 can smoothly pass through and be fixed in the first mounting groove 1432 and the second mounting groove 1433.

[0061] Furthermore, as a preferred embodiment of this solution and not a limitation, the lower part of the movable plate 141 is also provided with a reset device 144. When the mold is closed, the reset device 144 moves the movable plate 141 away from the moving mold assembly. When the movable plate 141 is reset, its upper end abuts against the first insert fixing plate 3.

[0062] In this embodiment, the reset device 144 is located at the lower part of the movable plate 141. Its main function is to provide a thrust away from the moving mold assembly to the movable plate 141 when the mold is closed, ensuring that the movable plate 141 can accurately return to its initial position. The reset device 144 can be one or more cylinders, hydraulic cylinders, springs, or other mechanical devices capable of providing thrust. These devices are precisely installed at the lower part of the movable plate 141 to ensure that the movable plate 141 accurately returns to its initial position when the mold is closed. This provides stable conditions for the next injection molding process, ensuring product quality and production efficiency.

[0063] Preferably, the reset device 144 includes a plurality of return rods evenly arranged at the lower part of the movable plate 141, and the fixed template 4 has a plurality of through holes corresponding to the return rods and allowing them to pass through. When the mold is closed, the lower end of the return rod abuts against the upper end of the movable template.

[0064] In this embodiment, the reset device 144 consists of multiple return rods evenly distributed below the movable plate 141. These return rods, as the core components of the reset device 144, are responsible for pushing the movable plate 141 to reset when the mold is closed. To ensure that the return rods can smoothly pass through the various components of the mold, the fixed plate 4 needs to be designed with through holes that match the number, position, and size of the return rods. These through holes allow the return rods to move freely without obstruction during the mold opening and closing process.

[0065] In actual production, after the mold opens and the demolding process is completed, the movable plate 141 and the second molding insert 52 on it are located at the lower part of the fixed mold assembly. At this time, the various components of the mold begin to prepare for mold closing. As the mold gradually closes, the movable platen 11 begins to move upward. When the upper end of the movable platen 11 gradually approaches the lower end of the return rod, the return rod begins to be pushed upward by the movable platen 11.

[0066] This thrust is transmitted to the movable plate 141 via the return rod, pushing the movable plate 141 and the second molding insert 52 on it upwards. Simultaneously, the upper end of the movable plate 141 gradually approaches the first insert fixing plate 3. When the moving mold plate is fully closed, the lower end of the return rod abuts tightly against the upper end of the moving mold plate. At this point, the movable plate 141 also accurately returns to its initial position, its upper end abutting tightly against the first insert fixing plate 3. After the mold is fully closed, the injection molding machine begins to inject molten plastic material. The plastic material fills the mold cavity and, after cooling, forms the final product: a fabric softener pouring cap.

[0067] Furthermore, as a preferred embodiment of this solution and not a limitation, the moving mold insert 12 includes a third molding insert 121 with one end fixed to the second insert fixing plate 7. The other end of the third molding insert 121 can pass through the ejector plate 8, support plate 9, push plate 10, and moving mold plate 11 and extend into the mold cavity 13. A fourth molding insert 122 is sleeved around the third molding insert 121. One end of the fourth molding insert 122 is fixed to the second insert fixing plate 7, and the other end can pass through the ejector plate 8 and support plate. 9. The push plate 10 and the moving template 11 extend into the mold cavity 13 and are used to cooperate with the fixed mold insert 5 to form the inner ring thread of the cover. The outer periphery of the fourth molding insert 122 is rotatably connected to the fifth molding insert 123. The lower part of the fifth molding insert 123 is connected to the second demolding assembly 15, and its upper end can pass through the ejector plate 8, the support plate 9, the push plate 10, and the moving template 11 and extend into the mold cavity 13. The upper part of the fifth molding insert 123 is provided with a second thread groove 1231 to form the outer ring thread of the cover.

[0068] In this embodiment, the second demolding assembly 15, connected to the lower part of the fifth molding insert 123, functions during mold opening. Since the fifth molding insert 123 and the fourth molding insert 122 are rotatably connected, the second demolding assembly 15 can drive the fifth molding insert 123 to rotate relative to the fourth molding insert 122, thereby separating the outer ring thread of the molded cap from the fifth molding insert 123, achieving demolding of the outer ring thread of the cap. Combined with the demolding of the inner thread of the cap by the aforementioned first demolding assembly 14, the entire injection mold demolding mechanism can completely complete the demolding process of the fabric softener pouring cap with its inner and outer threaded structure.

[0069] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the second demolding component 15 includes a drive mechanism 151 located between the fixed mold component and the moving mold component, the fifth molding insert 123 is provided with a driven mechanism 152 that cooperates with and is connected to the drive mechanism 151, and a linkage 153 is provided between any two driven mechanisms 152.

[0070] In this embodiment, the drive mechanism 151 is located between the fixed mold assembly and the moving mold assembly, and serves as the power source for the second demolding assembly 15. It can be a hydraulic cylinder, pneumatic cylinder, electric cylinder, or any mechanism capable of providing linear or rotary motion. The output end of the drive mechanism 151 is designed with a connection interface for connecting to the driven mechanism 152, thereby transmitting power. The driven mechanism 152 is mounted on the fifth molding insert 123 and mates with the output end of the drive mechanism 151. Correspondingly, the driven mechanism 152 can be a connecting rod, connecting sleeve, gear, or any mechanism that matches the output end of the drive mechanism 151. A linkage 153 is positioned between any two driven mechanisms 152 to ensure that multiple fifth molding inserts 123 can rotate synchronously. Similarly, the linkage 153 can be a connecting rod, chain, gear, timing belt, or any mechanism capable of achieving synchronous motion. One end of the linkage 153 is connected to one driven mechanism 152, and the other end is connected to another driven mechanism 152, thus forming a closed-loop synchronous motion system. Through the cooperation of the drive mechanism 151, the driven mechanism 152, and the linkage 153, the second demolding assembly 15 in this embodiment can precisely control the rotational movement of the fifth molding insert 123, thereby achieving smooth demolding of the threaded portion of the outer ring of the injection molded part. The design of the linkage 153 ensures synchronous rotation among multiple fifth molding inserts 123, improving demolding efficiency and consistency.

[0071] Furthermore, as a preferred embodiment of this solution and not a limitation, the driving mechanism 151 includes a screw 1511 with one end fixedly connected to the fixed mold assembly and the other end passing through the moving mold assembly. A matching threaded sleeve 1512 is sleeved around the outer periphery of the screw 1511. A driving gear ring 1513 that can cooperate with the driven mechanism 152 is provided around the outer periphery of the threaded sleeve 1512. Third bearings 1514 that are sleeved and fixed to the threaded sleeve 1512 are respectively provided on the upper and lower sides of the driving gear ring 1513. The third bearings 1514 are respectively embedded in the ejector plate 8 and the support plate 9. When the mold is opened, the screw 1511 moves away from the threaded sleeve 1512, causing the driving gear ring 1513 to rotate and driving the driven mechanism 152 to disengage the fifth molding insert 123 from the inner ring thread of the cover.

[0072] In this embodiment, the screw 1511 is the core component of the drive mechanism 151. One end of it is fixedly connected to the fixed mold assembly, and the other end passes through the moving mold assembly. The threaded sleeve 1512 is sleeved on the outer circumference of the screw 1511 and forms a threaded engagement with the screw 1511. When the screw 1511 and the threaded sleeve 1512 move axially relative to each other, it is converted into the rotational motion of the threaded sleeve 1512. The drive gear ring 1513 is arranged around the outer circumference of the threaded sleeve. Its function is to engage with the driven mechanism and transmit the rotational motion of the threaded sleeve 1512 to the driven mechanism. The drive gear ring 1513 is equivalent to a power output component, converting the motion between the screw 1511 and the threaded sleeve 1512 into power that can drive the driven mechanism 152. Third bearings 1514, preferably roller bearings, are provided on the upper and lower sides of the drive gear ring 1513 and are fixed to the threaded sleeve 1512. These roller bearings are embedded in the ejector plate 8 and the support plate 9, serving to support and position the threaded sleeve, ensuring smooth rotation of the threaded sleeve 1512, and isolating the rotational movement of the threaded sleeve 1512 from the ejector plate 8 and the support plate 9 to avoid mutual interference, thus ensuring the stability and reliability of the entire mechanism. Through the cooperation of the screw 1511, the threaded sleeve 1512, the drive gear ring 1513, and the third bearings 1514, the drive mechanism 151 in this embodiment can precisely control the rotational movement of the fifth molding insert 123, thereby achieving smooth demolding of the threaded portion of the injection molded part. The application of roller bearings effectively reduces the frictional resistance of the drive gear ring 1513 during rotation, improving demolding efficiency and mold life.

[0073] Furthermore, as a preferred embodiment of this solution and not a limitation, the driven mechanism 152 includes a driven gear ring 1521 annularly disposed on the fifth molding insert 123. Fourth bearings 1522, which are sleeved and fixed to the fifth molding insert 123, are respectively provided on the upper and lower sides of the driven gear ring 1521. The fourth bearings 1522 are respectively embedded in the ejector plate 8 and the support plate 9. The fourth bearings 1522 are preferably deep groove bearings. When the mold opens, the drive mechanism 151 causes the driven gear ring 1521 to rotate and disengages the fifth molding insert 123 from the inner ring thread of the cover. A linkage member 153 is also provided between any two adjacent driven gear rings 1521. The linkage member 153 is preferably a gear matching the tooth profile of the driven gear ring 1521.

[0074] Specifically, in actual production, when the mold opens, the screw 1511 in the drive mechanism 151 begins to move linearly relative to the threaded sleeve 1512, causing the threaded sleeve 1512 to rotate. The rotation of the threaded sleeve 1512 is transmitted to the driven gear ring 1521 in the driven mechanism 152 via the drive gear ring 1513. After receiving the rotational power transmitted by the drive gear ring 1513, the driven gear ring 1521 begins to rotate around the axis of the fifth molding insert 123. Since the driven gear ring 1521 is fixedly connected to the fifth molding insert 123, and the fifth molding insert 123 is fitted onto the fourth molding insert 122 and can rotate relative to its axis, the rotation of the driven gear ring 1521 will drive the fifth molding insert 123 to rotate together. The rotation of the fifth molding insert 123 causes the outer threaded portion of the cover to gradually separate from the second thread groove 1231 on the fifth molding insert 123. Meanwhile, since a linkage 153 is provided between any two adjacent driven gear rings 1521, when one driven gear ring 1521 rotates, the other driven gear rings 1521 will also rotate synchronously through the transmission action of the linkage 153, thereby ensuring the synchronous rotation of multiple fifth molding inserts 123. As the fifth molding insert 123 continues to rotate, the outer ring threaded part of the injection molded part completely disengages from the fifth molding insert 123. At this time, all the injection molded parts of the cover can be smoothly removed.

[0075] Through the cooperation of the driven gear ring 1521 and the fourth bearing 1522, the driven mechanism 152 in this embodiment can accurately receive the rotational power transmitted by the drive mechanism 151 and drive the fifth molding insert 123 to rotate synchronously. The linkage 153 ensures the synchronous rotation among multiple fifth molding inserts 123, improving the consistency and stability of demolding.

[0076] Furthermore, as a preferred embodiment of this solution and not a limitation, the moving mold insert 12 includes a sixth molding insert 124 sleeved around the outer periphery of the fifth molding insert 123. The lower end of the sixth molding insert 124 is fixed to the push plate 10, and its upper end can pass through the moving template 11 and extend into the mold cavity 13. A plurality of anti-rotation grooves 1241 are provided around the upper end of the sixth molding insert 124 so that the fifth molding insert 123 can be disengaged from the outer ring thread of the cover when the mold is opened.

[0077] In this embodiment, the moving mold insert 12 includes a sixth molding insert 124, which is fitted around the outer periphery of the fifth molding insert 123. Its lower end is fixedly mounted on the push plate 10, meaning that the sixth molding insert 124 moves along with the push plate 10 when the mold is closed. To address the issue that the fifth molding insert 123 might be unable to rotate and demold due to an overly tight fit with the outer ring thread of the cover when the mold is opened, multiple anti-rotation grooves 1241 are designed around the upper end of the sixth molding insert 124, which are located within the mold cavity 13 when the mold is closed. These anti-rotation grooves 1241 create a protrusion structure 100 that matches the anti-rotation grooves 1241 during the mold forming process. This provides a non-rotating support point for the fifth molding insert 123 during mold opening, preventing rotation or jamming caused by a tight thread fit, and ensuring that the fifth molding insert 123 can smoothly disengage from the outer ring thread of the cover when the mold is opened.

[0078] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the second demolding assembly 15 includes an ejection mechanism 154 disposed on the moving mold assembly, which ejects the cover when the fifth molding insert 123 disengages from the outer ring thread of the cover.

[0079] In this embodiment, the ejector mechanism 154 can adopt a common ejector pin or push plate structure. Throughout the demolding process, the ejector mechanism 154 works closely with the other components described above. First, the first demolding assembly 14 completes the demolding of the inner thread of the cover body. The drive mechanism 151 and the driven mechanism 152 of the second demolding assembly 15 work together to demold the outer thread of the cover body. After these demolding actions are completed, the ejector mechanism 154 is activated in a timely manner to eject the cover body. This coordinated work ensures the continuity and efficiency of the demolding process, guarantees the smooth progress of injection molding production, and avoids production interruptions or product damage caused by the cover body remaining in the mold.

[0080] Specifically, the ejection mechanism 154 includes a plurality of guide rods 1541 fixed on the ejector plate 8. A first movable groove 1542 and a second movable groove 1543 matching the guide rods 1541 are respectively provided in the support plate 9 and the push plate 10. A limiting ring 1544 is embedded at the bottom of the second movable groove 1543. The guide rods 1541 pass through the limiting ring 1544 and cooperate with it to limit the travel of the push plate 10. A second elastic element 15 is provided in the first movable groove 1542. 45. The second elastic element 1545 is sleeved on the guide rod 1541, and its two ends abut against the upper end of the limiting ring 1544 and the ejector plate 8, respectively. When the fifth molding insert 123 is disengaged from the outer ring thread of the cover, the second elastic element 1545 causes the push plate 10 to move away from the support plate 9. Subsequently, the push plate 10 moves away from the moving template 11 and causes the anti-rotation groove 1241 of the sixth molding insert 124 to disengage from the cover, so that the cover is pushed out by the upper end of the moving template 11.

[0081] In actual production, after the cover body is injection molded, the mold begins to open. When the fifth molding insert 123 is completely disengaged from the outer ring thread of the cover body, the second elastic element 1545 begins to function. The elastic potential energy is released and acts directly on the bottom of the limiting ring 1544, pushing the push plate 10 and the moving template 11 away from the support plate 9, and at the same time driving the sixth molding insert 124 to move together. During this process, the anti-rotation groove 1241 on the sixth molding insert 124 gradually separates from the cover, preparing for the ejection of the cover. Since the limiting ring 1544 is embedded at the bottom of the second movable groove 1543, it cooperates with the guide rod 1541 to limit the movement stroke of the push plate 10. When the push plate 10 reaches its maximum movement stroke, that is, when the limiting ring 1544 abuts against the corresponding limiting end of the upper part of the guide rod 1541, the moving template 11 and the push plate 10 begin to move away from each other. It should be added that when the cover injection molding is applied in this embodiment, the lower edge of the cover is in contact with the upper end surface of the moving template 11. Therefore, as the moving template 11 and the push plate 10 move away from each other, the moving template 11 will push the cover to separate from the sixth molding insert 124. More specifically, it means separating the cover from the anti-rotation groove 1241 at the upper end of the sixth molding insert 124 and ejecting it. In summary, the ejection mechanism 154 works closely with other structures of the mold, and can eject the cover in a timely and effective manner after the inner and outer ring threads of the cover are demolded, ensuring the efficiency and continuity of the entire injection mold demolding process and improving production efficiency.

[0082] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the moving mold assembly is provided with a plurality of sprue hooks 16, one end of which is embedded in the push plate 10, and the other end extends through the moving mold plate 11 into the mold cavity 13.

[0083] In the actual injection molding process, the molten plastic enters the mold cavity 13 through the corresponding runners within the mold to form a fabric softener cap. The sprue is the channel through which the molten plastic enters the mold cavity from the runners. The sprue hook 16 extends into the mold cavity 13, contacts the plastic at the sprue, and connects with the sprue during the molding process. During demolding, when the mold opens for demolding, the ejector plate moves. Since one end of the sprue hook 16 is embedded in the ejector plate, the movement of the ejector plate causes the sprue hook to move along with it. The sprue hook 16, utilizing its connection with the sprue within the mold cavity, can hook the sprue out of the mold. This helps to ensure consistent separation of the sprue and the molded cap from the mold during demolding, preventing sprue residue from remaining in the mold and ensuring a smooth demolding process. Specifically, the end of the sprue hook 16 is spherical. Compared to a sharp or flat end, the spherical end has a larger contact area with the sprue, which disperses the hooking force and reduces the risk of breakage or damage caused by excessive local stress on the sprue. Since the sprues of fabric softener pouring caps are usually thin or narrow, this force-dispersing characteristic is particularly important, effectively preventing the sprue from being pulled apart during demolding, thus avoiding impacts on production efficiency and product quality.

[0084] Furthermore, as a preferred embodiment of this solution and not a limitation, a plurality of guide mechanisms 17 for limiting the opening and closing stroke are provided between the fixed mold assembly and the moving mold assembly. Specifically, two guide mechanisms are symmetrically arranged on both sides of the entire mold.

[0085] More specifically, the guiding mechanism 17 includes a guide block 171 fixed to the outside of the fixed template 4 and the moving template 11 respectively. The guide block 171 has an opening and a guide rail 172 passes through the opening. The two ends of the guide rail 172 are respectively provided with limiting ends 173 to prevent it from falling out of the guide block 171.

[0086] In this embodiment, the guide block 171 is the main supporting component of the guiding mechanism, and is fixedly installed on the outer side of the fixed template 4 and the moving template 11, respectively. The guide rail 172 passes through the opening in the guide block 171 to guide the moving template 11 to move precisely relative to the fixed template 4. Limiting ends 173 are provided at both ends of the guide rail 172 to limit the mold opening and closing stroke. The limiting ends can be blocks fixed to both ends of the guide rail, or limiting structures machined from the guide rail itself. Through the setting of the guiding mechanism 17, the injection mold demolding mechanism of this embodiment not only improves the stability and accuracy of mold opening and closing, but also effectively extends the service life of the mold. At the same time, the design of the limiting ends also ensures precise control of the mold opening and closing stroke, providing a strong guarantee for the high-quality production of fabric softener pouring caps.

[0087] Working principle of this invention:

[0088] This embodiment provides a demolding mechanism for an injection mold used for a fabric softener pouring cap. Through the coordinated operation of a first demolding component and a second demolding component, efficient and non-destructive demolding of the inner and outer threads of the cap is achieved, respectively. The first demolding component, utilizing a movable plate, bearing assembly, and pusher device, drives the second molding insert in the fixed mold insert to rotate and pull down during mold opening, using rotational inertia to demold the inner thread. The second demolding component, through a drive mechanism, driven mechanism, and linkage, drives the fifth molding insert in the moving mold insert to rotate synchronously, causing the outer thread to disengage. After the inner and outer threads are demolded, the ejection mechanism, through an elastic element, pushes the push plate and moving mold plate to separate, smoothly ejecting the cap. Furthermore, the mold is designed with a guide mechanism and a sprue hook to ensure precise and stable mold opening and closing strokes and effectively address sprue residue issues. The overall design cleverly combines mechanical structure and motion principles, significantly improving demolding efficiency and product quality, and solving the problem of product deformation or thread damage that is common with traditional injection molds.

[0089] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A threaded demolding mechanism for an inner ring of a fabric softener cap injection mold, comprising a fixed mold assembly and a moving mold assembly, wherein the fixed mold assembly comprises a fixed mold base plate (1), a hot runner plate (2), a first insert fixing plate (3), and a fixed template (4) connected sequentially from top to bottom, wherein the first insert fixing plate (3) is connected to a plurality of fixed mold inserts (5) passing through the fixed template (4), and the moving mold assembly comprises a moving mold base plate (6), a second insert fixing plate (7), an ejector plate (8), a support plate (9), a push plate (10), and a moving template (11) connected sequentially from bottom to top, wherein the second insert fixing plate (7) is connected to a plurality of moving mold inserts (12) passing through the ejector plate (8), the push plate (10), and the moving template (11), wherein when the mold is closed, a mold cavity (13) for cap forming is formed between the moving template (11), the fixed template (4), the fixed mold inserts (5), and the moving mold inserts (12), characterized in that: The fixed mold assembly is provided with a first demolding component (14) that can be movably connected to the fixed mold insert (5) and cooperate to demold the inner ring thread of the cover. The fixed mold insert (5) includes a first molding insert (51) with one end fixedly connected to the first insert fixing plate (3), and the other end of the first molding insert (51) can pass through the fixed mold plate (4). A second molding insert (52) is movably connected to the outer periphery of the first molding insert (51). The lower part of the second molding insert (52) is provided with a first thread groove (521) for forming the inner ring thread of the cover. The first demolding assembly (14) includes a movable plate (141) movably disposed within the first insert fixing plate (3). The movable plate (141) is fixed with a plurality of bearing assemblies (142) corresponding to each of the fixed mold inserts (5). The bearing assemblies (142) are fitted with the second molding insert (52). The second molding insert (52) passes through the movable plate (141). When the mold is opened, the inner ring thread of the cover body drives the second molding insert (52) to pull down and rotate relative to the first molding insert (51) until the second molding insert (52) separates from the cover body through rotational inertia. The first demolding assembly (14) includes a pusher device (143) disposed on the upper part of the movable plate (141). When the mold is opened, the pusher device (143) causes the movable plate (141) to tend to move away from the fixed mold base plate (1). The booster device (143) includes a plurality of first elastic members (1431) evenly arranged on both sides of the upper part of the movable plate (141). The upper part of the movable plate (141) and the lower part of the fixed mold base plate (1) are respectively provided with a first mounting groove (1432) and a second mounting groove (1433). The first elastic member (1431) passes through the hot runner plate (2) and the first insert fixing plate (3), and its two ends are respectively provided in the first mounting groove (1432) and the second mounting groove (1433).

2. The inner ring thread demolding mechanism of the fabric softener cap injection mold according to claim 1, characterized in that, The bearing assembly (142) includes a first bearing (1421) and a second bearing (1422) sleeved on the outer periphery of the second molded insert (52). The outer periphery of the second molded insert (52) is provided with a limiting protrusion (522), which is sandwiched between the first bearing (1421) and the second bearing (1422).

3. The inner ring thread demolding mechanism of the fabric softener cap injection mold according to claim 2, characterized in that, The movable plate (141) includes an upper floating plate (1411), and a lower floating plate (1412) is fixedly connected to the bottom of the upper floating plate (1411). The first bearing (1421) is fixedly installed inside the upper floating plate (1411), and the second bearing (1422) is fixedly installed inside the lower floating plate (1412).

4. The inner ring thread demolding mechanism of the fabric softener cap injection mold according to claim 1, characterized in that, The lower part of the movable plate (141) is also provided with a reset device (144). When the mold is closed, the reset device (144) moves the movable plate (141) away from the moving mold assembly. When the movable plate (141) is reset, its upper end abuts against the first insert fixing plate (3).

5. The inner ring thread demolding mechanism of the fabric softener cap injection mold according to claim 4, characterized in that, The reset device (144) includes a plurality of return rods evenly arranged at the lower part of the movable plate (141). The fixed template (4) has a plurality of through holes corresponding to the return rods and allowing them to pass through. When the mold is closed, the lower end of the return rod abuts against the upper end of the movable template (11).

6. The inner ring thread demolding mechanism of a fabric softener cap injection mold according to any one of claims 1-5, characterized in that, Multiple guide mechanisms (17) for limiting the opening and closing stroke are provided between the fixed mold assembly and the moving mold assembly.

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