Inner ring thread demolding mechanism of softener cover liquid pouring cover injection mold

Abstract

The inner ring thread demolding mechanism of the softener cover liquid pouring cover injection mold comprises a fixed mold assembly and a movable mold assembly, the fixed mold assembly comprises a first insert fixing plate, a fixed mold plate and the like, the first insert fixing plate is connected with a plurality of fixed mold inserts penetrating through the fixed mold plate, and the movable mold assembly comprises a second insert fixing plate, a movable mold plate and the like. The second insert fixing plate is connected with a plurality of movable mold inserts, when the mold is closed, a mold cavity for forming a cover body is formed among the movable mold plate, the fixed mold plate, the fixed mold inserts and the movable mold inserts, and a first demolding assembly is arranged in the fixed mold assembly. Rotary demolding of the threads of the inner ring of the liquid pouring cover is achieved through the first demolding assembly. In the mold opening process, the second forming insert is pulled downwards and rotates relative to the first forming insert, the threads of the inner ring of the cover body are naturally separated from the mold through rotation inertia, the problem of cover body deformation caused by direct pulling of a traditional injection mold is solved, and therefore the appearance quality and the use performance of a product are remarkably improved.

Description

[Technical field] The invention relates to the technical field of injection molds, in particular to an inner circle thread demoulding mechanism of an injection mold for a softener cap pouring cap. [Background technology] 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. As a common plastic product, the structure of the softener pouring cap usually includes an inner thread and an outer thread (see Figure 10 to Figure 11 ), which are used to seal the protective cover and the softener bottle. However, due to the complex thread structure of the softener pouring cover, the following problems are often prone to occur during the traditional injection mold demoulding process: First, when demolding traditional injection molds, the molded cover body is usually removed from the mold by direct pulling. Since the internal and external thread structures of the cover body are closely matched with the mold inserts, forced pulling can easily cause the cover body to deform, affecting the appearance and performance of the product; secondly, the threaded part is the key functional area of ​​the softener pouring cap, and its accuracy and integrity directly affect the sealing and assembly performance of the product. However, when separating the threads, the traditional demolding method is prone to damage the thread surface due to friction or jamming, or even fracture, thereby reducing product quality; in addition, the demolding process of traditional injection molds usually requires manual intervention, such as manually adjusting mold parts or dealing with jamming problems, which not only increases the workload of operators, but also prolongs the production cycle and reduces overall production efficiency. In addition, frequent friction and jamming will accelerate the wear of mold parts, shorten the service life of the mold, and increase the cost of maintenance and replacement of molds.

[0003] In order to solve the above problems, some improvement schemes have been proposed in the prior art. For example, some threaded molds use a rotary demoulding mechanism, which drives the threaded insert to rotate so that the thread gradually separates from the cover body. These improvements reduce the risk of thread damage to a certain extent, but the complexity of the threaded mold rotary mechanism under the prior art is relatively high. The existing rotary demoulding mechanism usually requires complex mechanical transmission components (such as gear sets, chains, hydraulic or pneumatic drive devices) to realize the rotational movement of the threaded insert. The design and manufacturing requirements of these components are high and require precise matching. The synchronization between the driving mechanism and the driven mechanism is difficult to ensure, and jamming or offset phenomena are prone to occur. [Summary of the invention] The purpose of the present invention is to provide an injection mold demoulding mechanism that can efficiently and non-destructively complete the demoulding of the inner circle thread of a softener pouring cap, aiming to solve the problems of easy deformation and easy damage of the thread during demoulding of the softener pouring cap in the prior art.

[0005] The present invention is achieved by the following technical solutions: The invention discloses an inner circle thread demoulding mechanism of an injection mold for a softener cap pouring cap, comprising a fixed mold assembly and a movable mold assembly, wherein the fixed mold assembly comprises a fixed mold base plate, a hot runner plate, a first insert fixing plate, and a fixed mold plate which are sequentially connected from top to bottom, wherein the first insert fixing plate is connected with a plurality of fixed mold inserts which pass through the fixed mold plate, and the movable mold assembly comprises a movable mold base plate, a second insert fixing plate, an ejector plate, a support plate, a push plate, and a movable mold plate which are sequentially connected from bottom to top, wherein the second insert fixing plate is connected with a plurality of movable mold inserts which pass through the ejector plate, the push plate, and the movable mold plate, and when the mold is closed, a mold cavity for forming a cover body is formed between the movable mold plate, the fixed mold plate, the fixed mold insert, and the movable mold insert, and a first demoulding assembly which can be movably connected with the fixed mold insert and cooperate to demould the inner circle thread of the cover body is provided in the fixed mold assembly.

[0006] As described above, the inner circle thread demoulding mechanism of the injection mold of the softener cap pouring cap, the fixed mold insert includes a first molding insert having 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, and the lower part of the second molding insert is provided with a first screw groove for molding the inner circle thread of the cap body.

[0007] As described above, the inner circle thread demolding mechanism of the injection mold of the softener cap pouring cap, the first demolding component includes a movable plate movably arranged in the first insert fixing plate, a plurality of bearing groups corresponding to each of the fixed mold inserts are fixed in the movable plate, the bearing group is inherently provided with the second molding insert, the second molding insert passes through the movable plate, when the mold is opened, the inner circle thread of the cover body drives the second molding insert to be pulled down and rotated relative to the first molding insert until the second molding insert and the cover body are separated by rotational inertia.

[0008] As described above, in the inner ring thread demolding mechanism of the softener cap pouring cap injection mold, the bearing group includes a first bearing and a second bearing which are sleeved on the outer periphery of the second molding insert, and the outer periphery of the second molding insert is ringed with a limiting protrusion, and the limiting protrusion is clamped between the first bearing and the second bearing.

[0009] As described above, in the inner circle thread demoulding mechanism of the softener cap pouring cap injection mold, the movable plate includes an upper floating plate, the bottom of the upper floating plate is fixedly connected to the lower floating plate, the upper floating plate is fixedly provided with the plane bearing, and the lower floating plate is fixedly provided with the second bearing.

[0010] As described above, in the inner circle thread demolding mechanism of the softener cap pouring cap injection mold, the first demolding component includes a booster device arranged on the upper part of the movable plate. When the mold is opened, the booster device makes the movable plate tend to move away from the fixed mold base plate.

[0011] As described above, in the inner circle thread demolding mechanism of the softener cap pouring cap injection mold, the booster device includes a plurality of first elastic members 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 member passes through the hot runner plate and the first insert fixing plate, and its two ends are respectively arranged in the first mounting groove and the second mounting groove.

[0012] As described above, in the inner circle thread demoulding mechanism of the softener cap pouring cap injection mold, a reset device is also provided at the lower part of the movable plate. When the mold is closed, the reset device moves the movable plate away from the movable mold assembly. When the movable plate is reset, its upper end abuts against the first insert fixing plate.

[0013] As described above, the inner circle thread demoulding mechanism of the softener cap pouring cap injection mold, the reset device includes a plurality of return rods evenly arranged at the lower part of the movable plate, and the fixed mold plate is provided with a plurality of through holes corresponding to the return rods and for them to pass through. When the mold is closed, the lower end of the return rod abuts against the upper end of the movable mold plate.

[0014] In the inner circle thread demoulding mechanism of the injection mold of the softener cap pouring cap as described above, a plurality of guide mechanisms for limiting the mold opening and closing strokes are arranged between the fixed mold assembly and the movable mold assembly.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present application realizes the rotary demoulding of the inner thread of the pouring cap through the first demoulding component. During the mold opening process, the second molding insert is pulled down and rotated relative to the first molding insert, and the inner thread of the cap body is naturally separated from the mold by the rotation inertia, avoiding the deformation of the cap body caused by direct pulling of the traditional injection mold, thereby significantly improving the appearance quality and performance of the product.

[0016] 2. This application adopts a bearing group design to sleeve the first bearing and the second bearing on the outer periphery of the second molding insert, and fixes the position through a limiting protrusion, thereby effectively reducing friction; at the same time, the booster device provides smooth power for the demolding process, reduces the wear on the thread surface, ensures the accuracy and integrity of the thread, and thus improves the sealing and assembly performance of the product.

[0017] 3. The rotary demoulding mechanism in the prior art usually relies on complex mechanical transmission components, with complex structure and high maintenance cost. The present application utilizes the rotational inertia generated by the tension of the pouring cover and the threaded fit when the mold is opened to achieve adaptive rotary demoulding without the need for an additional power source; at the same time, the reset device automatically resets the movable plate, greatly simplifying the demoulding mechanism design, reducing manual intervention, significantly improving production efficiency and reducing maintenance costs.

Brief Description of the Drawings

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of this embodiment; Figure 2 is a top view of this embodiment; Figure 3 for Figure 2 Schematic diagram of the cross section along line AA; Figure 4 for Figure 2 Schematic diagram of the cross section along line BB; Figure 5 for Figure 2 Schematic diagram of the cross section along line CC; Figure 6 for Figure 2 Schematic diagram of the cross section along line DD; Figure 7 for Figure 2 Schematic cross-section along line EE; Figure 8 for Figure 5 The enlarged schematic diagram of F in the middle; Fig. 9 Schematic diagram of the internal three-dimensional structure of this embodiment; Fig.10 This is a schematic diagram of the structure of the softener pouring cover corresponding to the production application of this embodiment; Fig.11 It is a cross-sectional schematic diagram of the softener pouring cover corresponding to the production application of this embodiment. [Specific implementation method] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] As a common plastic product, the softener pouring cap can be found at Figure 10 to Figure 11 , and its structure usually includes an inner circle thread and an outer circle thread, the outer circle thread is used to seal and connect with the softener bottle, and the inner circle thread is used to connect with an additional protective cover. For the injection molding of the above-mentioned softener pouring cap, due to the complexity of the cover body thread structure, the traditional injection mold is often prone to product deformation, thread damage and other problems during demoulding, affecting the product quality and production efficiency. In order to solve the above problems, this embodiment proposes an injection mold demoulding mechanism for the softener pouring cap, which realizes efficient and non-destructive demoulding of the inner circle thread and the outer circle thread of the cover body.

[0022] See also Figures 1 to 9 A demoulding mechanism for an injection mold for a softener pouring cover, comprising a fixed mold assembly and a movable 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 mold plate 4 connected in sequence from top to bottom, wherein the first insert fixing plate 3 is connected with a plurality of fixed mold inserts 5 passing through the fixed mold plate 4, and the movable mold assembly comprises a movable mold base plate 6, a second insert fixing plate 7, an ejector plate 8, a support plate 9, a push plate 10, and a movable mold plate 11 connected in sequence from bottom to top, wherein the second insert fixing plate 7 is connected with a plurality of fixed mold inserts 5 passing through the fixed mold plate 4, and wherein the first insert fixing plate 3 ... The ejector plate 8, the push plate 10, and the movable mold insert 12 of the movable mold plate 11, when the mold is closed, a mold cavity 13 for forming the cover body is formed between the movable mold plate 11, the fixed mold plate 4, the fixed mold insert 5 and the movable mold insert 12, a first demolding component 14 that can be movably connected with the fixed mold insert 5 and cooperate to demold the inner circle thread of the cover body is provided in the fixed mold assembly, and a second demolding component 15 that can be movably connected with the movable mold insert 12 and cooperate to demold the outer circle thread of the cover body is provided between the movable mold assembly and the fixed mold assembly.

[0023] In this embodiment, 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 in sequence from top to bottom. Among them, the first insert fixing plate 3 is connected with a plurality of fixed mold inserts 5 passing through the fixed mold plate 4, and these fixed mold inserts 5 are used to form the inner circle threaded portion of the cover body. The movable mold assembly includes a movable mold base plate 6, a second insert fixing plate 7, an ejector plate 8, a support plate 9, a push plate 10, and a movable mold plate 11 connected in sequence from bottom to top. The second insert fixing plate 7 is connected with a plurality of movable mold inserts 12 passing through the ejector plate 8, the push plate 10, and the movable mold plate 11, and these movable mold inserts 12 are used to form the outer threaded portion and other non-threaded portions of the cover body. When the mold is closed, the movable mold plate 11, the fixed mold plate 4, the fixed mold inserts 5 and the movable mold inserts 12 are tightly matched to form a mold cavity 13 for molding the cover body.

[0024] A first demoulding component 14 is provided in the fixed mold assembly, and the component can be movably connected to the fixed mold insert 5. During the demoulding process, the first demoulding component 14 can move relative to the fixed mold insert 5, so as to cooperate to smoothly demould the inner circle threaded part of the cover body. This design avoids thread damage caused by directly pulling the cover body. Correspondingly, a second demoulding component 15 is provided between the movable mold assembly and the fixed mold assembly, and the second demoulding component 15 can also be movably connected to the movable mold insert 12. During the demoulding process, the second demoulding component 15 can move relative to the movable mold insert 12, so as to cooperate to smoothly demould the outer circle threaded part of the cover body. Similarly, this design also avoids the problem of thread damage. Through the synergistic effect of the first demoulding component and the second demoulding component, efficient demoulding of the inner and outer threads of the softener pouring cover is achieved, which greatly improves production efficiency.

[0025] Furthermore, as a preferred embodiment of the present solution but not a limitation, the fixed mold insert 5 includes a first molding insert 51 having 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, and the lower part of the second molding insert 52 is provided with a first screw groove 521 for forming the inner circle thread of the cover body.

[0026] In this embodiment, the first molding insert 51 is the main part of the fixed mold insert 5, and 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 the injection molding process. The other end of the first molding insert 51 is designed to pass through the fixed mold plate 4 so as to cooperate with the movable mold insert 12 to form a mold cavity 13 when the mold is closed. The second molding insert 52 is connected to the first molding insert 51 in a movable manner. More specifically, the upper part of the first molding insert 51 is designed as a screw structure, and the second molding insert 52 has a matching screw sleeve structure. This design allows the second molding insert 52 to perform a spiral lifting motion relative to the first molding insert 51.

[0027] At the lower part of the second molding insert 52, a first screw groove 521 for molding the inner circle thread of the cover body is provided. The size and shape of these screw grooves 521 need to match the inner circle thread design of the softener pouring cover to ensure the accuracy and integrity of the thread after injection molding. During the injection molding process, the molten plastic is injected into the mold cavity 13 formed by the movable mold assembly and the fixed mold assembly. At this time, the second molding insert 52 and the first molding insert 51 are closely matched to form the molding part of the inner circle thread of the cover body. When the injection molding is completed, the mold begins to open. At this time, the first demolding assembly 14 starts to work, which can be a driving mechanism such as a cylinder, a hydraulic cylinder, etc. connected to the second molding insert 52. The driving mechanism pushes the second molding insert 52 to perform a spiral lifting motion relative to the first molding insert 51, thereby gradually loosening the connection with the inner threaded portion of the molding cover body. As the second molding insert 52 spirally lifts and lowers, the inner threaded portion of the cover body can be demolded smoothly. At the same time, the second demolding assembly 15 in the movable mold assembly also starts to work, pushing the movable mold insert 12 to move relative to the outer threaded portion of the cover body to achieve demolding of the outer thread. Finally, when the mold is fully opened, the molded softener pouring cover can be taken out of the mold. The second molding insert 52 and the first molding insert 51 adopt a spiral connection structure, so that the demolding mechanism in this embodiment can separate the inner and outer threaded portions of the cover body more smoothly and evenly, reducing the damage and deformation that may occur during the demolding process, and improving the product quality.

[0028] Further, as a preferred embodiment of the present solution but not limiting, the first demoulding assembly 14 includes a movable plate 141 movably arranged in the first insert fixing plate 3, a plurality of bearing groups 142 corresponding to the fixed mold inserts 5 are fixed in the movable plate 141, the bearing group 142 is sleeved with the second molding insert 52, and the second molding insert 52 passes through the movable plate 141. When the mold is opened, the inner thread of the cover body drives the second molding insert 52 to be pulled down and rotated relative to the first molding insert 51 until the second molding insert 52 and the cover body are separated by rotational inertia.

[0029] In this embodiment, the first insert fixing plate 3 has a movable space for the movable plate 141 to be lifted and displaced, which provides a movable space and foundation for the subsequent demoulding action, so that the demoulding mechanism can flexibly realize the corresponding function. A plurality of bearing groups 142 are fixedly arranged in the movable plate 141, and these bearing groups 142 correspond one-to-one to each fixed mold insert 5. The bearing group 142 can be composed of one or more bearings, and its main function is to reduce friction and ensure that the second molding insert 52 can rotate smoothly. This one-to-one corresponding design ensures that the second molding insert 52 corresponding to each fixed mold insert 5 can obtain stable support and good rotation conditions, which is conducive to improving the stability and reliability of the entire demoulding process. Each bearing group 142 is sleeved with the corresponding second molding insert 52, and the second molding insert 52 passes through the movable plate 141. This sleeve-and-penetrate connection allows the second molding insert 52, the bearing group 142, and the movable plate 141 to form an organic whole. More specifically, the bearing group 142 provides rotational support for the second molding insert 52, while the movable plate 141 limits the movement direction of the second molding insert 52 to a certain extent, ensuring that it can be pulled down and rotated on a specific trajectory.

[0030] When the mold begins to open, the fixed mold assembly and the movable mold assembly gradually separate. Since the inner thread of the cover body is formed by the first screw groove 521 on the second molding insert 52 during the injection molding process, the cover body and the second molding insert 52 are closely matched. At this time, the movement of the cover body will drive the second molding insert 52 that cooperates with it to produce a downward pull-down trend. In the process of the cover body driving the second molding insert 52 to pull down, since the second molding insert 52 is rotationally connected to the first molding insert 51, and the spiral shape of the inner thread determines that rotational movement will inevitably occur when pulling down. The existence of the bearing group 142 greatly reduces the friction force when the second molding insert 52 rotates, so that the second molding insert 52 can rotate smoothly relative to the first molding insert 51. As the mold opening action continues, the second molding insert 52 is continuously pulled down and rotated. When it reaches a certain degree, the second molding insert 52 will be separated from the cover body by using the rotational inertia, thereby completing the demoulding process of the inner thread of the cover body. The rotational inertia plays a key role here, which helps the second molding insert 52 to completely disengage from the inner thread of the cover body, avoids the jamming phenomenon between the threads, and ensures the smooth demoulding. The first demoulding assembly cleverly utilizes the movement of the cover body when the mold is opened through the coordinated work of the movable plate 141, the bearing group 142 and the second molding insert 52, and realizes the automatic demoulding of the inner thread of the cover body. This design not only improves the efficiency of demoulding and reduces manual intervention, but also effectively avoids demoulding damage caused by improper manual operation, ensuring the quality of the product and the stability of production.

[0031] Furthermore, as a preferred embodiment of the present invention but not a limitation, the bearing group 142 includes a first bearing 1421 and a second bearing 1422 which are sleeved on the outer periphery of the second molding insert 52, and a limiting protrusion 522 is provided on the outer periphery of the second molding insert 52, and the limiting protrusion 522 is clamped between the plane bearing and the deep groove bearing.

[0032] Preferably, the first bearing 1421 is a plane bearing, which is sleeved on the outer periphery of the second molding insert 52, and mainly bears the axial load to adapt to the axial tension that may be generated by the second molding insert 52 during the demolding process, and ensures the stable movement of the second molding insert 52 in the axial direction. When the cover body drives the second molding insert 52 to be pulled down, the plane bearing can effectively support and guide this axial movement, reducing axial friction and shaking.

[0033] Preferably, the second bearing 1422 is a deep groove bearing, which is also sleeved on the outer periphery of the second molding insert 52. The deep groove bearing is mainly used to bear radial loads, and can also bear certain axial loads. When the second molding insert 52 rotates relative to the first molding insert 51, the deep groove bearing can ensure its stability in the radial direction, make the rotation smoother, reduce the deviation and jamming caused by the radial force, and ensure that the second molding insert 52 can accurately rotate according to the predetermined trajectory.

[0034] In this embodiment, the limiting protrusion 522 plays a role in accurately limiting the relative position of the plane bearing and the deep groove bearing. It can prevent the plane bearing and the deep groove bearing from axial movement during the movement of the second molding insert 52, ensuring that the two bearings always maintain the correct relative position relationship, thereby ensuring the stability and reliability of the entire bearing group. At the same time, 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 molding insert 52. Through this bearing group structure composed of a plane bearing, a deep groove bearing and a limiting protrusion 522, it is possible to provide all-round support and stable movement conditions for the second molding insert 52. During the demolding process of the inner thread of the cover body, it can effectively withstand the axial downward pull force to ensure that the second molding insert 52 is smoothly pulled down, and it can also ensure its radial stability during the rotation process, so that the second molding insert 52 can flexibly and smoothly rotate relative to the first molding insert 51.

[0035] Furthermore, as a preferred implementation of the present solution but not a limitation, the movable plate 141 includes an upper lifting plate 1411, the bottom of which is fixedly connected to a lower lifting plate 1412, the upper lifting plate 1411 is fixedly provided with the plane bearing 1421, and the lower lifting plate 1412 is fixedly provided with the deep groove bearing 1422.

[0036] 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 bearing. If a bearing has a problem, such as wear or damage, it is only necessary to operate the corresponding upper floating plate or lower floating plate, without large-scale disassembly of the entire movable plate, which reduces the difficulty and cost of maintenance.

[0037] Furthermore, as a preferred embodiment of the present invention but not a limitation, the first demolding assembly 14 includes a boosting device 143 disposed on the upper part of the movable plate 141. When the mold is opened, the boosting device 143 causes the movable plate 141 to tend to move away from the fixed mold base plate 1.

[0038] In this embodiment, the booster device 143 is a key component arranged on the upper part of the movable plate 141. Its main function is to provide a thrust for 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 thereon from the cover body, thereby improving the demolding efficiency and reliability.

[0039] Specifically, the boosting device 143 can 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 boosting device 143 quickly generates thrust to push the movable plate 141 and the second molding insert 52 thereon to move downward and away from the fixed mold base plate 1.

[0040] Furthermore, as a preferred embodiment of the present invention but not a limitation, the boosting device 143 includes a plurality of first elastic members 1431 evenly arranged on both sides of the upper portion of the movable plate 141, the upper portion of the movable plate 141 and the lower portion 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 arranged in the first mounting groove 1432 and the second mounting groove 1433.

[0041] In this embodiment, the first elastic member 1431 is a core component of the booster device 143, which is used to provide a thrust for the movable plate 141 to move away from the fixed mold base plate 1. The first elastic member 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 notch provided on the upper part of the movable plate 141 for mounting one end of the first elastic member 1431. These notches match the shape and size of the first elastic member 1431 to ensure that the first elastic member 1431 can be firmly mounted on the movable plate 141. Similarly, the second mounting groove 1433 is a notch provided on the lower part of the fixed mold base plate 1 for mounting the other end of the first elastic member 1431. Similar to the first mounting groove 1432, these notches also match the shape and size of the first elastic member 1431. When the mold is in a closed state, the first elastic member 1431 is compressed and stored in energy. When the mold is opened, the first elastic member 1431 releases the stored energy and pushes the movable plate 141 to move downward, thereby accelerating the demoulding process.

[0042] In order to ensure that the first elastic member 1431 can smoothly pass through various components of the mold, corresponding penetration holes or channels are also designed on the hot runner plate 2 and the first insert fixing plate 3. The size and position of these penetration holes or channels need to match the first elastic member 1431 to ensure that the first elastic member 1431 can smoothly pass through and be fixed in the first installation groove 1432 and the second installation groove 1433.

[0043] Furthermore, as a preferred embodiment of the present invention but not a limitation, a reset device 144 is also provided at the lower part of the movable plate 141. When the mold is closed, the reset device 144 moves the movable plate 141 away from the movable mold assembly. When the movable plate 141 is reset, its upper end abuts against the first insert fixing plate 3.

[0044] In this embodiment, the reset device 144 is arranged at the lower part of the movable plate 141. Its main function is to provide a thrust for the movable plate 141 away from the movable mold assembly when the mold is closed, so as to ensure that the movable plate 141 can be accurately reset to the initial position. The reset device 144 can be one or more cylinders, hydraulic cylinders, springs or other mechanical devices that can provide thrust. These devices are precisely installed at the lower part of the movable plate 141 to ensure that the movable plate 141 is accurately reset to the initial position when the mold is closed. This provides stable conditions for the next injection molding process and ensures product quality and production efficiency.

[0045] 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 is provided with a plurality of through holes corresponding to the return rods and for 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.

[0046] In this embodiment, the reset device 144 is composed of a plurality of return rods evenly arranged at the lower part of the movable plate 141. These return rods, as the core component of the reset device 144, are responsible for pushing the movable plate 141 to reset when the mold is closed. In order to ensure that the return rods can smoothly pass through the various components of the mold, the fixed mold 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 hindrance during the mold opening and closing process.

[0047] In actual production, after the mold is opened and the demoulding process is completed, the movable plate 141 and the second molding insert 52 thereon are in the lower position of the fixed mold assembly mold. At this time, the various components of the mold begin to prepare for mold closing. As the mold is gradually closed, the movable plate 11 begins to move upward. When the upper end of the movable plate 11 gradually approaches the lower end of the return rod, the return rod begins to receive an upward thrust from the movable plate 11.

[0048] This thrust is transmitted to the movable plate 141 through the return rod, pushing the movable plate 141 and the second molding insert 52 thereon to move upward. At the same time, the upper end of the movable plate 141 gradually approaches the first insert fixing plate 3. When the movable platen is fully molded in place, the lower end of the return rod is tightly abutted against the upper end of the movable platen. At this time, the movable plate 141 is also accurately reset to the initial position, and its upper end is tightly abutted against the first insert fixing plate 3. After the mold is fully molded, the injection molding machine starts to inject molten plastic material. The plastic material fills the mold cavity and forms the final product of the softener pouring cap after cooling.

[0049] Further, as a preferred embodiment of the present invention but not a limitation, the movable mold insert 12 includes a third molding insert 121 having one end fixed to the second insert fixing plate 7, and the other end of the third molding insert 121 can pass through the ejector plate 8, the support plate 9, the push plate 10, and the movable mold plate 11 and then extend into the mold cavity 13, and the outer periphery of the third molding insert 121 is provided with a fourth molding insert 122, and 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, the support plate 9, the push plate 10, and the movable mold plate 11. 9, the push plate 10, and the movable template 11 extend into the mold cavity 13, and are used to cooperate with the fixed mold insert 5 to form the inner circle thread of the cover body. The outer periphery of the fourth molding insert 122 is rotatably connected with the fifth molding insert 123, and the lower part of the fifth molding insert 123 is connected with the second demolding component 15, and its upper end can pass through the ejector plate 8, the support plate 9, the push plate 10, and the movable template 11 and then extend into the mold cavity 13. A second screw groove 1231 is arranged on the upper part of the fifth molding insert 123 to form the outer circle thread of the cover body.

[0050] In this embodiment, the second demolding assembly 15 connected to the lower part of the fifth molding insert 123 plays a role when the mold is opened. Since the fifth molding insert 123 is rotationally connected to the fourth molding insert 122, the second demolding assembly 15 can drive the fifth molding insert 123 to rotate relative to the fourth molding insert 122, so that the molded outer ring thread of the cover is separated from the fifth molding insert 123, and the outer ring thread of the cover is demolded. Combined with the first demolding assembly 14 mentioned above to realize the demolding of the inner thread of the cover body, the entire injection mold demolding mechanism can completely complete the demolding process of the softener pouring cover with inner and outer thread structures.

[0051] Furthermore, as a preferred embodiment of the present invention but not a limitation, the second demolding assembly 15 includes a driving mechanism 151 located between the fixed mold assembly and the movable mold assembly, the fifth molding insert 123 is provided with a driven mechanism 152 that cooperates with the driving mechanism 151, and a linkage member 153 is provided between any two of the driven mechanisms 152.

[0052] In this embodiment, the driving mechanism 151 is located between the fixed mold assembly and the movable mold assembly, and is the power source of the second demolding assembly 15. It can be a hydraulic cylinder, a pneumatic cylinder, an electric cylinder or any mechanism that can provide linear or rotational motion. The output end of the driving mechanism 151 is designed with a connection interface for connecting with the driven mechanism 152 to transmit power. The driven mechanism 152 is arranged on the fifth molding insert 123 and matches with the output end of the driving mechanism 151. Accordingly, the driven mechanism 152 can be a connecting rod, a connecting sleeve, a gear or any mechanism that can match the output end of the driving mechanism 151. The linkage member 153 is arranged between any two driven mechanisms 152 to ensure that multiple fifth molding inserts 123 can rotate synchronously. Similarly, the linkage member 153 can be a connecting rod, a chain, a gear, a synchronous belt or any mechanism that can achieve synchronous motion. One end of the linkage member 153 is connected to a driven mechanism 152, and the other end is connected to another driven mechanism 152, thereby forming a closed-loop synchronous motion system. Through the cooperation of the driving mechanism 151, the driven mechanism 152 and the linkage member 153, the second demoulding assembly 15 in this embodiment can accurately control the rotational movement of the fifth molding insert 123, thereby realizing the smooth demoulding of the outer threaded portion of the injection molded part. The design of the linkage member 153 ensures the synchronous rotation between the multiple fifth molding inserts 123, thereby improving the efficiency and consistency of demoulding.

[0053] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the driving mechanism 151 includes a screw 1511 having one end fixedly connected to the fixed mold assembly and the other end passing through the movable mold assembly, the outer periphery of the screw 1511 is provided with a threaded sleeve 1512 matching the screw, the outer periphery of the threaded sleeve 1512 is provided with a driving gear ring 1513 which can be matched with the driven mechanism 152, and the upper and lower sides of the driving gear ring 1513 are respectively provided with third bearings 1514 which are sleeved and fixed with the threaded sleeve 1512, and the third bearings 1514 are respectively embedded in the ejector plate 8 and the support plate 9, and when the mold is opened, the screw 1511 is relatively away from the threaded sleeve 1512 to rotate the driving gear ring 1513, and drive the driven mechanism 152 to disengage the fifth molding insert 123 from the inner thread of the cover body.

[0054] In this embodiment, the screw 1511 is the core component of the driving mechanism 151, one end of which is fixedly connected to the fixed mold assembly, and the other end passes through the movable mold assembly. The screw sleeve 1512 is sleeved on the outer periphery of the screw 1511 and forms a threaded fit with the screw 1511. When the screw 1511 and the screw sleeve 1512 move relative to each other axially, it will be converted into the rotational motion of the screw sleeve 1512. The driving gear ring 1513 is arranged around the outer periphery of the screw sleeve, and its function is to cooperate with the driven mechanism to transmit the rotational motion of the screw sleeve 1512 to the driven mechanism. The driving gear ring 1513 is equivalent to a power output component, which converts the motion between the screw 1511 and the screw sleeve 1512 into power that can drive the driven mechanism 152. The third bearing 1514 which is sleeved and fixed with the screw sleeve 1512 is respectively arranged on the upper and lower sides of the driving gear ring 1513, and the third bearing 1514 is preferably a roller bearing, which is embedded in the ejector plate 8 and the support plate 9, plays the role of supporting and positioning the screw sleeve, ensuring that the screw sleeve 1512 can rotate smoothly, and at the same time, the rotational movement of the screw sleeve 1512 is separated from the ejector plate 8 and the support plate 9 to avoid mutual interference, thereby ensuring the stability and reliability of the entire mechanism. Through the mutual cooperation of the screw 1511, the screw sleeve 1512, the driving gear ring 1513 and the third bearing 1514, the driving mechanism 151 in this embodiment can accurately control the rotational movement of the fifth molding insert 123, thereby realizing the smooth demoulding of the outer ring threaded part of the injection molded part. The application of the roller bearing effectively reduces the friction resistance of the driving gear ring 1513 during the rotation process, and improves the demoulding efficiency and the service life of the mold.

[0055] Further, as a preferred embodiment of the present solution but not limiting, the driven mechanism 152 includes a driven gear ring 1521 annularly arranged on the fifth molding insert 123, and fourth bearings 1522 sleeved and fixed to the fifth molding insert 123 are respectively arranged on the upper and lower sides of the driven gear ring 1521, and the fourth bearings 1522 are respectively embedded in the ejector plate 8 and the support plate 9, and the fourth bearings 1522 are preferably deep groove bearings. When the mold is opened, the driving mechanism 151 rotates the driven gear ring 1521 and causes the fifth molding insert 123 to be disengaged from the inner thread of the cover body, and the linkage member 153 is also arranged between any two adjacent driven gear rings 1521, and the linkage member 153 is preferably a gear matching the tooth shape of the driven gear ring 1521.

[0056] Specifically, in actual production, when the mold is opened, the screw 1511 in the driving mechanism 151 begins to perform linear motion relative to the screw sleeve 1512, and the screw sleeve 1512 rotates accordingly. The rotation of the screw sleeve 1512 is transmitted to the driven gear ring 1521 in the driven mechanism 152 through the driving gear ring 1513. After receiving the rotational power transmitted by the driving 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 sleeved on 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 ring thread portion of the cover body to gradually separate from the second screw groove 1231 on the fifth molding insert 123. At the same time, 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 effect of the linkage 153, thereby ensuring the synchronous rotation between multiple fifth molding inserts 123. As the fifth molding insert 123 continues to rotate, the outer ring threaded portion of the injection molded part is completely separated from the fifth molding insert 123. At this time, all the injection molded parts of the cover body can be smoothly taken out.

[0057] Through the cooperation between 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 driving mechanism 151, and drive the fifth molding insert 123 to rotate synchronously. The setting of the linkage member 153 ensures the synchronous rotation between the multiple fifth molding inserts 123, and improves the consistency and stability of demoulding.

[0058] Furthermore, as a preferred embodiment of the present scheme but not a limitation, the movable mold insert 12 includes a sixth molding insert 124 which is sleeved on 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 the upper end thereof can pass through the movable mold plate 11 and extend into the mold cavity 13, a plurality of anti-rotation tooth grooves 1241 are provided around the upper end of the sixth molding insert 124 to facilitate the disengagement of the fifth molding insert 123 from the outer circle thread of the cover body when the mold is opened.

[0059] In this embodiment, the movable mold insert 12 includes a sixth molding insert 124, which is sleeved on the outer periphery of the fifth molding insert 123, and its lower end is fixedly mounted on the push plate 10, which means that when the mold is in the mold-closed state, the sixth molding insert 124 will move with the push plate 10. In order to solve the problem that the fifth molding insert 123 and the outer ring thread of the cover body may be too tightly matched and cannot be rotated and demolded when the mold is opened, a plurality of anti-rotation tooth grooves 1241 located in the mold cavity 13 when the mold is in the mold-closed state are designed around the upper end of the sixth molding insert 124. These anti-rotation tooth grooves 1241 form a protruding structure 100 that matches the anti-rotation tooth grooves 1241 when the cover body is molded, thereby providing a non-rotating support point for the fifth molding insert 123 during the mold opening process, preventing rotation or jamming caused by tight thread fit, and ensuring that the fifth molding insert 123 can be smoothly disengaged from the thread of the outer ring of the cover body when the mold is opened.

[0060] Further, as a preferred embodiment of the present solution but not a limitation, the second demolding assembly 15 includes an ejection mechanism 154 disposed on the movable mold assembly, which ejects the cover body when the fifth molding insert 123 is disengaged from the outer circle thread of the cover body.

[0061] In this embodiment, the ejection mechanism 154 can adopt a common ejector type or push plate type structure. During the entire demolding process, the ejection mechanism 154 cooperates closely with the other components described above. First, the first demolding component 14 completes the demolding of the inner thread of the cover body, and the driving mechanism 151 and the driven mechanism 152 of the second demolding component 15 cooperate to realize the demolding of the outer thread of the cover body. When these demolding actions are completed, the ejection mechanism 154 is started in time to eject the cover body. This collaborative work ensures the continuity and efficiency of the demolding process, ensures that the injection molding production can proceed smoothly, and avoids production interruptions or product damage caused by the cover body remaining in the mold.

[0062] 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 rod 1541 passes through the limiting ring 1544 and cooperates with the limiting ring 1544 to limit the movable stroke of the push plate 10, and a second elastic member 1542 is provided in the first movable groove 1542. 45. The second elastic member 1545 is sleeved on the guide rod 1541, and the two ends thereof are respectively abutted against the upper ends of the limit ring 1544 and the ejector plate 8. When the fifth molding insert 123 is disengaged from the outer thread of the cover body, the second elastic member 1545 causes the push plate 10 to move away from the support plate 9, and then the push plate 10 moves away from the movable template 11, and causes the stop tooth groove 1241 of the sixth molding insert 124 to be disengaged from the cover body, so that the cover body is ejected by the upper end of the movable template 11.

[0063] In actual production, after the injection molding of the cover body is completed, the mold begins the mold opening process. When the fifth molding insert 123 is completely separated from the outer thread of the cover body, the second elastic member 1545 begins to play a role, and the elastic potential energy is released to directly act on the bottom of the limit ring 1544, pushing the push plate 10 and the movable plate 11 relatively away from the support plate 9, while 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 body, preparing for the ejection of the cover body. Since the limit ring 1544 is embedded in the bottom of the second movable groove 1543, it cooperates with the guide rod 1541 to limit the movable stroke of the push plate 10. When the push plate 10 reaches the maximum movable stroke, that is, when the limit ring 1544 abuts against the corresponding limit end on the upper part of the guide rod 1541, the movable template 11 and the push plate 10 begin to move relatively apart. It should be added that when the cover body injection molding applicable to this embodiment is molded, the lower edge of the cover body is in contact with the upper end surface of the movable template 11. Therefore, as the movable template 11 and the push plate 10 move relatively apart, the movable template 11 will push the cover body to separate from the sixth molding insert 124, more specifically, it refers to separating the cover body 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 cooperates closely with other structures of the mold, and can promptly and effectively eject the cover body after the inner and outer thread circles of the cover body are demoulded, thereby ensuring the efficiency and continuity of the entire injection mold demoulding process and improving production efficiency.

[0064] Furthermore, as a preferred implementation of the present solution but not a limitation, a plurality of sprue hooks 16 are provided in the movable mold assembly, one end of the sprue hooks 16 is embedded in the push plate 10 , and the other end passes through the movable mold plate 11 and extends into the mold cavity 13 .

[0065] In the actual injection molding process, the plastic melt enters the mold cavity 13 through the corresponding flow channel in the mold to be formed into a softener pouring cover. The sprue is the channel part through which the plastic melt enters the mold cavity from the flow channel. After the sprue hook needle 16 extends into the mold cavity 13, it contacts the plastic of the sprue part and is connected to the sprue during the molding process. During the demolding process, when the mold is opened for demolding, the push plate will move. Since one end of the sprue hook needle 16 is embedded in the push plate, the movement of the push plate drives the sprue hook needle to move together. The sprue hook needle 16 uses its connection relationship with the sprue in the mold cavity to hook the sprue out of the mold. This helps to separate the sprue and the formed cover body from the mold together with the consistency during demolding, avoids the sprue remaining in the mold, and ensures the smooth progress of the mold demolding process. In particular, the end of the nozzle hook needle 16 is spherical. Compared with a sharp or flat end, the spherical end has a larger contact area with the nozzle, so as to disperse the hooking force and reduce the risk of the nozzle being broken or damaged due to excessive force on the local part of the nozzle. Since the nozzle of the softener pouring cover is usually thin or fine, this force dispersion characteristic is particularly important, which can effectively prevent the nozzle from being broken during the demoulding process, affecting production efficiency and product quality.

[0066] Furthermore, as a preferred embodiment of the present invention but not a limitation, a plurality of guide mechanisms 17 for limiting the mold opening and closing strokes are provided between the fixed mold assembly and the movable mold assembly. Specifically, two guide mechanisms 17 are symmetrically provided on both sides of the entire mold.

[0067] More specifically, the guide mechanism 17 includes guide blocks 171 respectively fixed to the outside of the fixed template 4 and the movable template 11, the guide block 171 is provided with an opening and a guide rail 172 is passed through the hole, and the two ends of the guide rail 172 are respectively provided with limit ends 173 to prevent it from slipping out of the guide block 171.

[0068] In this embodiment, the guide block 171 is the main supporting component of the guide mechanism, and is fixedly mounted on the outer sides of the fixed template 4 and the movable template 11 respectively. The guide rail 172 is inserted into the opening of the guide block 171, and is used to guide the movable template 11 to move accurately relative to the fixed template 4. The two ends of the guide rail 172 are respectively provided with limit ends 173, which are used to limit the opening and closing stroke of the mold. The limit end can be a block fixed at both ends of the guide rail, or it can be a limit structure processed by the guide rail itself. Through the setting of the guide mechanism 17, the demoulding mechanism of the injection mold of this embodiment not only improves the stability and accuracy of the opening and closing of the mold, but also effectively extends the service life of the mold. At the same time, the design of the limit end also ensures the precise control of the opening and closing stroke of the mold, which provides a strong guarantee for the high-quality production of the softener pouring cover.

[0069] Working principle of the present invention: This embodiment provides an injection mold demoulding mechanism for a softener pouring cap, which realizes efficient and non-destructive demoulding of the inner and outer threads of the cap body respectively through the coordinated work of the first demoulding component and the second demoulding component. The first demoulding component uses a movable plate, a bearing group and a booster device to drive the second molding insert in the fixed mold insert to rotate and pull down when the mold is opened, and completes the demoulding of the inner thread by means of rotational inertia; the second demoulding component drives the fifth molding insert in the movable mold insert to rotate synchronously through the driving mechanism, the driven mechanism and the linkage part, so that the outer thread is disengaged. After the demoulding of the inner and outer threads is completed, the ejection mechanism pushes the push plate and the movable mold plate to separate through the elastic part, and the cap body is ejected smoothly. In addition, the mold is designed with a guide mechanism and a water outlet hook to ensure that the opening and closing stroke is accurate and stable, and effectively deal with the problem of water outlet residue. The overall design cleverly combines the mechanical structure with the principle of motion, significantly improves the demoulding efficiency and product quality, and solves the problem that traditional injection molds are prone to product deformation or thread damage.

[0070] The above are implementation methods provided in combination with specific contents, and it is not intended that the specific implementation of this application is limited to these descriptions. Any method structure similar to that of this application, or any technical deduction or replacement based on the concept of this application, shall be deemed to be within the protection scope of this application.

Claims

1. An inner thread demoulding mechanism of an injection mold for a softener cap pouring cap, comprising a fixed mold assembly and a movable 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 mold plate (4) connected in sequence from top to bottom, wherein the first insert fixing plate (3) is connected with a plurality of fixed mold inserts (5) passing through the fixed mold plate (4), and the movable mold assembly comprises a movable mold base plate (6), a second insert fixing plate (7), an ejector plate (8), a support plate (9), a push plate (10), and a movable mold plate (11) connected in sequence from bottom to top, wherein the second insert fixing plate (7) is connected with a plurality of movable mold inserts (12) passing through the ejector plate (8), the push plate (10), and the movable mold plate (11), and when the mold is closed, a mold cavity (13) for forming a cover body is formed between the movable mold plate (11), the fixed mold plate (4), the fixed mold insert (5), and the movable mold insert (12), wherein: The fixed mold component is provided with a first demoulding component (14) which can be movably connected to the fixed mold insert (5) and cooperates to demould the inner thread of the cover body.

2. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 1, characterized in that: The fixed mold insert (5) comprises a first molding insert (51) having 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); a second molding insert (52) is movably connected to the periphery of the first molding insert (51); and a first screw groove (521) for forming the inner circle thread of the cover body is provided around the lower part of the second molding insert (52).

3. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 2, characterized in that: The first demoulding component (14) comprises a movable plate (141) movably arranged in the first insert fixing plate (3), a plurality of bearing groups (142) corresponding to the fixed mold inserts (5) are fixedly arranged in the movable plate (141), the bearing group (142) is sleeved with the second molding insert (52), and the second molding insert (52) passes through the movable plate (141), and when the mold is opened, the inner circle thread of the cover body drives the second molding insert (52) to be pulled down and rotated relative to the first molding insert (51) until the second molding insert (52) is separated from the cover body by rotational inertia.

4. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 3, characterized in that: The bearing group (142) comprises a first bearing (1421) and a second bearing (1422) which are sleeved on the outer circumference of the second molding insert (52); a limiting protrusion (522) is provided on the outer circumference of the second molding insert (52); and the limiting protrusion (522) is sandwiched between the first bearing (1421) and the second bearing (1422).

5. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 4, characterized in that: The movable plate (141) comprises an upper buoyancy plate (1411), the bottom of the upper buoyancy plate (1411) being fixedly connected to a lower buoyancy plate (1412), the upper buoyancy plate (1411) having the plane bearing (1421) fixedly disposed therein, and the lower buoyancy plate (1412) having the second bearing (1422) fixedly disposed therein.

6. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 3, characterized in that: The first demoulding assembly (14) comprises a boosting device (143) arranged on the upper part of the movable plate (141); when the mold is opened, the boosting device (143) causes the movable plate (141) to have a tendency to move away from the fixed mold base plate (1).

7. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 6, characterized in that: The boosting device (143) comprises a plurality of first elastic members (1431) uniformly arranged on both sides of the upper portion of the movable plate (141); the upper portion of the movable plate (141) and the lower portion 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 arranged in the first mounting groove (1432) and the second mounting groove (1433).

8. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 3, characterized in that: A reset device (144) is also provided at the lower part of the movable plate (141). When the mold is closed, the reset device (144) moves the movable plate (141) away from the movable mold assembly. When the movable plate (141) is reset, its upper end abuts against the first insert fixing plate (3).

9. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to claim 8, characterized in that: The resetting device (144) comprises a plurality of return rods evenly arranged at the lower part of the movable plate (141); the fixed plate (4) is provided with a plurality of through holes corresponding to the return rods and for the return rods to pass through; when the mold is closed, the lower end of the return rod abuts against the upper end of the movable plate (11).

10. The inner thread demoulding mechanism of the injection mold of the softener cap pouring cap according to any one of claims 1 to 9, characterized in that: A plurality of guide mechanisms (17) for limiting the mold opening and closing strokes are provided between the fixed mold assembly and the movable mold assembly.

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