Die

Abstract

The mold comprises a forming mold assembly, a threaded core, a moving driving part, a rotating driving part, an induction matching part, an induction element and a control element. The threaded core can move in and out and is rotatably arranged in the forming die assembly, so that the threaded core moves and rotates to reach the position where the threaded part is located in the forming die assembly when the forming die assembly is closed, and the threaded core rotates to be separated from the product when the forming die assembly is opened. And a driving shaft of the rotary driving piece and the movable driving piece are in transmission connection with the threaded core through a transmission assembly so as to drive movement and rotation. One of the induction matching piece and the induction element is synchronously and rotationally connected to the driving shaft so as to rotate relative to the other, and the induction matching piece and the induction element are in induction matching to determine the rotation stroke of the driving shaft. And the control element determines that the in-mold end part of the thread of the thread core rotates in place according to the rotation stroke reaching the preset stroke, and controls to stop driving according to the rotation in-place. According to the mold, whether the threaded end of the threaded core rotates in place or not can be monitored, and excessive rotation can be prevented.

Description

Technical Field

[0001] This disclosure relates to the field of molding apparatus technology, and more particularly to molds. Background Technology

[0002] A mold is a tool used to shape products. It is used to form a cavity for shaping products when the mold is closed, and to inject molten liquid molding material into the cavity and form a solid product after cooling.

[0003] In related technologies, when a mold is used to form threaded products, the threaded core of the mold is typically used to form the threads of the product. The threaded core is usually rotatably mounted within the mold to facilitate mold closing and product rotation and demolding after forming. During the rotational mold closing and / or demolding process of the threaded core, monitoring the rotation of the threaded end of the threaded core to the correct position is crucial to ensure the quality of the formed product and the smooth progress of the mold closing and demolding process. However, during demolding and / or mold closing rotation, the threaded portion of the threaded core is usually located inside the mold, making it difficult to directly observe whether the threaded end of the threaded core has rotated to the correct position. Related technologies lack monitoring devices and corresponding position control devices capable of monitoring whether the threaded end of the threaded core has rotated to the correct position. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide a mold that can monitor whether the threaded end of the threaded core has been rotated into place and prevent over-rotation, which is beneficial to ensuring the smooth progress of the mold closing and demolding process.

[0005] This disclosure provides a mold comprising: at least one molding die assembly, including at least two molding die parts movable relative to each other along an opening / closing direction to approach / move away from the mold; at least one threaded core movable in and out and rotatably disposed between the at least two molding die parts, so as to move and rotate to a position where the threaded portion is located inside the molding die assembly during mold closing to cooperate in molding a product, and to rotate out of the product during mold opening; a drive assembly, including: a moving drive member and a rotating drive member, wherein the drive shaft of the rotating drive member and the moving drive member are connected to the threaded core via a transmission assembly to drive the threaded core to move and rotate; and a sensing group. The device includes a sensing mating component and at least one sensing element, one of which is synchronously rotatably connected to the drive shaft so as to be rotatable relative to the other; wherein the sensing mating component is provided with at least one sensing part for being sensed by the sensing element to cause a change in the sensing signal output by the sensing element; the sensing signal is used to determine the rotational stroke of the drive shaft; and a control element is connected to the sensing element and the rotational drive component respectively, so as to determine that the threaded end of the threaded core has rotated into position according to the rotational stroke reaching a preset stroke, and control the rotational drive component to stop driving according to the rotational position.

[0006] According to some embodiments provided in this disclosure, the rotation to the desired position includes at least one of the following conditions: (1) the rotation stroke sensed by the sensing element includes the mold closing rotation angle of the drive shaft, the control element determines that the mold entry end is in position when the mold closing rotation angle reaches a preset angle, and controls the rotation drive to stop the mold closing drive; (2) the rotation stroke sensed by the sensing element includes the number of demolding rotations of the drive shaft, the control element determines that the mold entry end is in position when the number of demolding rotations reaches a preset number of rotations, and controls the rotation drive to stop the demolding drive.

[0007] According to some embodiments provided in this disclosure, the demolding of the threaded core further includes at least one of the following conditions: (1) the threaded entry end of the threaded core extends to one of its axial ends, so that the axial end of the threaded core can be rotated into place with the threaded demolding and exit the product; (2) the mold further includes: a mating core, which is movably disposed between the at least two molding parts and is located on opposite sides of the molding mold assembly with the threaded core, and is provided with a mold closing mating part for circumferential mating when the entry end of the mold is closed.

[0008] According to some embodiments provided in this disclosure, the sensing part is of at least two types, including a plurality of first sensing parts located on the same circular path and a second sensing part located outside the circular path; the at least two sensing elements include: a first sensing element, which is a first sensor that, relative to the rotation path, includes the sensing position of each of the first sensing parts, and is implemented to sense the plurality of first sensing parts through which the rotation passes and outputs a plurality of first sub-signals so as to reflect the mold closing rotation angle of the drive shaft via the number of outputs of the first sub-signals; and a second sensing element, which, relative to the rotation path, includes the sensing position of the second sensing part, and is implemented to output a plurality of second sub-signals after a plurality of rotations through the second sensing part so as to reflect the number of demolding rotations of the drive shaft via the number of outputs of the second sub-signals.

[0009] According to some embodiments provided in this disclosure, the first sensing part and the second sensing part have different structural features, and at least two of the sensing elements are implemented as proximity switches of different types for sensing different structural features. According to some embodiments provided in this disclosure, there are multiple molding die assemblies and threaded cores that correspond one-to-one, and the multiple threaded cores rotate synchronously under the drive of the same drive shaft and the transmission of multiple sets of transmission assemblies.

[0010] According to some embodiments provided in this disclosure, each set of transmission components includes: a first gear, which is drive-connected to the drive shaft and has a first end and a second end respectively close to and away from the molding die assembly; a second gear, which is slidably engaged with the first gear between the first end and the second end, and is rotatably sleeved on the outside of the threaded core to drive the threaded core to rotate, so as to slide from the second end to the first end and drive the threaded core to rotate when the mold is closed, and to slide from the second end to the first end and drive the threaded core to rotate when the mold is opened; and a transmission slide member, which is slidably disposed and restricted to rotation in the direction toward / away from the molding die assembly, and has two fixed parts abutting against opposite sides of the second gear for fixing the rotatable threaded core, and is connected to the moving drive member.

[0011] According to some embodiments provided in this disclosure, each group of transmission components further includes: an elastic element connected between the molding die and the transmission slider to provide an elastic force that drives the transmission slider to move away from the molding die assembly to reset.

[0012] According to some embodiments provided in this disclosure, it further includes: a driving gear connected to the drive shaft; and multiple sets of driven gears meshing on the outer periphery of the driving gear and being connected to the multiple threaded cores in a one-to-one transmission manner to drive the multiple threaded cores to rotate synchronously.

[0013] According to some embodiments provided in this disclosure, the mold further includes: an ejector assembly movably disposed in the molding die along the ejection direction for ejecting the product; and / or the die further includes: an anti-rotation portion fixed to the threaded core; and an anti-rotation member configured to engage with the anti-rotation portion when the circumferential position of the die inlet end is in place, thereby limiting the rotation of the threaded core; and / or the die further includes: at least two outer die members correspondingly fixed to the outer sides of at least two molding dies, and one of the outer die members having an inclined guide member fixed thereon; and a mating core slidably disposed in and out of the molding die assembly on the other outer die member, and having a sliding portion for the inclined guide member to be slidably inserted along the inclined direction for guiding its sliding in and out.

[0014] Beneficial effects:

[0015] (1) The mold disclosed herein can monitor whether the threaded end of the threaded core has been rotated into place and prevent over-rotation, which is beneficial to ensure the smooth progress of the mold closing and demolding process.

[0016] (2) The mold disclosed herein can control the threaded core to stop rotating only after the drive shaft has been fully ejected, which helps to avoid the threaded core spinning idly and avoids the threaded core not being fully ejected and interfering with the product ejection.

[0017] (3) The mold disclosed herein can control the threaded core to stop rotating in time when the drive shaft is rotated into position so that the circumferential position of the threaded core is rotated into position, which helps to avoid interference and collision between the threaded end of the threaded core and other cores.

[0018] (4) The mold disclosed herein can prepare multiple products at the same time, with high product preparation efficiency and a set of sensing components can simultaneously monitor the rotation position of multiple threaded cores. The sensing components are easy to arrange and have low arrangement cost.

[0019] (5) The mold disclosed herein can restrict the rotation of the threaded core when the mold is closed and rotated to the correct position, which is beneficial for double protection against excessive rotation of the threaded core during mold closing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the mold 100 according to an embodiment of the present disclosure.

[0021] Figure 2 This is a cross-sectional view of the mold 100 according to an embodiment of the present disclosure, taken along the first section line.

[0022] Figure 3 This is a schematic diagram of the structure of the threaded core portion according to an embodiment of the present disclosure.

[0023] Figure 4This is a cross-sectional view of the mold after it is opened according to an embodiment of the present disclosure, taken below the second section line.

[0024] Figure 5 This is a schematic diagram of the structure of some components of the mold according to an embodiment of the present disclosure.

[0025] Figure 6 yes Figure 5 An exploded view of the components.

[0026] Figure 7 This is a structural schematic diagram of another component of this disclosure.

[0027] Figure label:

[0028] Mold 100;

[0029] Molding mold assembly 11; First molding mold 111; Second molding mold 112;

[0030] Threaded core 12; mold entry end 121; anti-rotation part 122;

[0031] Drive assembly 13; moving drive component 131; rotating drive component 132; drive shaft 1321; synchronous shaft 1322;

[0032] Sensing assembly 14; sensing element 141; first sensing element 141a; second sensing element 141b; sensing mating part 142; sensing section 1421; first sensing section 1421a; second sensing section 1421b; mounting part 143;

[0033] Transmission assembly 15; first gear 151; first end 1511; second end 1512; second gear 152; transmission sliding member 153; fixed part 1531; elastic member 154;

[0034] 16-piece mating core; 161-piece mold closing mating part;

[0035] Driven gear 171; First driven gear 172; Second driven gear 173;

[0036] Ejector assembly 181; Ejector pin 1811; Floating component 182; Spring component 183;

[0037] Anti-rotation component 19;

[0038] First outer mold component 211; Second outer mold component 212; Inclined guide component 213;

[0039] Product 900. Detailed Implementation

[0040] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the information disclosed herein. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this disclosure can be modified or changed according to different viewpoints and application modules without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0041] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0042] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in any one or a group of embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples, without contradiction.

[0043] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a set" means two or more, unless otherwise explicitly specified.

[0044] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0045] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0046] While the terms first, second, etc., are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, step, operation, element, module, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0047] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0048] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the message of the present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0049] In related technologies, when a mold is used to form threaded products, the threaded core of the mold is typically used to form the threads of the product. The threaded core is usually rotatably mounted within the mold to facilitate mold closing and product rotation and demolding after forming. During the rotational mold closing and / or demolding process of the threaded core, monitoring the rotation of the threaded end of the threaded core to the correct position is crucial to ensure the quality of the formed product and the smooth progress of the mold closing and demolding process. However, during demolding and / or mold closing rotation, the threaded portion of the threaded core is usually located inside the mold, making it difficult to directly observe whether the threaded end of the threaded core has rotated to the correct position. Related technologies lack monitoring devices and corresponding position control devices capable of monitoring whether the threaded end of the threaded core has rotated to the correct position.

[0050] In view of this, the present disclosure provides a mold that can monitor whether the threaded end of the threaded core has been rotated into place and prevent over-rotation, which helps to ensure the smooth progress of the mold closing and demolding process.

[0051] Figure 1 This is a schematic diagram of the structure of the mold 100 according to an embodiment of the present disclosure. Figure 2 This is a cross-sectional view of the mold 100 according to an embodiment of the present disclosure, taken along the first section line. Figure 3 This is a schematic diagram of the threaded core portion according to an embodiment of this disclosure. (See attached diagram.) Figures 1 to 3 This disclosure provides a mold 100, including at least one molding die assembly 11, at least one threaded core 12, a drive assembly 13, a sensing assembly 14, and a control element.

[0052] Optionally, the molding die assembly 11 and the threaded core 12 may each be a single unit to form one product 900. Alternatively, there may be multiple molding die assemblies 11 and threaded cores 12, each corresponding to the other, to form multiple products 900, thereby improving the molding efficiency of the product 900.

[0053] The molding assembly 11 includes at least two molding components that are relatively movable along the mold opening and closing direction to approach the closed mold / move away from the mold. For example, see [reference needed]. Figure 2 The opening and closing direction can be Figure 2 In the vertical direction shown, at least two molding components include a first molding component 111 and a second molding component 112. The first molding component 111 and the second molding component 112 can move relative to each other to form a closed mold state for molding the product 900. The first molding component 111 and the second molding component 112 can also move relative to each other to form an open mold state, thereby exposing the molded product 900 for easy removal.

[0054] The threaded core 12 is movable, rotatable, and positioned between the at least two molding components. During mold closing, it moves and rotates to a position where the threaded portion is located inside the molding mold assembly 11 to engage with the molded product 900, and rotates out of the product 900 during mold opening. For example, during mold closing, the threaded core 12 can first move into position axially between the at least two molding components, then rotate to a circumferential position, thus completing mold closing. After mold opening, when the first molding component 111 and the second molding component 112 are separated, and the product 900 is fixed to a molding component (the second molding component 112), the threaded core 12 is threadedly connected to the product 900. When driven to rotate, the threaded core 12 can rotatably exit the product 900, thereby completing demolding.

[0055] The drive assembly 13 includes a moving drive component 131 and a rotating drive component 132. The drive shaft 1321 of the rotating drive component 132 and the moving drive component 131 are connected to the threaded core 12 via a transmission assembly 15 to drive the threaded core 12 to move and rotate. As an example, the moving drive component 131 can be implemented as a drive cylinder, and the rotating drive component 132 can be implemented as a drive motor, for example, as a dual-axis drive motor, or as a single-axis drive motor.

[0056] In some examples, when there is only one molding die assembly 11 and one threaded core 12, the transmission assembly 15 may be a set to drive one of the threaded cores 12 to move and rotate.

[0057] Figure 4 This is a cross-sectional view of the mold after it has been opened, along the second section line, according to an embodiment of this disclosure. (See also...) Figures 2 to 4 The transmission assembly 15 includes a first gear 151, a second gear 152, a transmission sliding member 153, and an elastic member 154.

[0058] The first gear 151 is drive-connected to the drive shaft 1321 and has a first end 1511 close to the molding die assembly 11 and a second end 1512 far from the molding die assembly 11. That is, the first gear 151 can be driven to rotate by the drive shaft 1321, and the first gear 151 has a first end 1511 close to the molding die assembly 11 and a second end 1512 far from the molding die assembly 11 relative to the first end 1511.

[0059] The second gear 152 is slidably engaged with the first gear 151 between the first end 1511 and the second end 1512, and is rotatably sleeved outside the threaded core 12. During mold closing, it slides from the second end 1512 to the first end 1511, causing the threaded core 12 to rotate; and during mold opening, it slides from the first end 1511 to the second end 1512, causing the threaded core 12 to rotate. The transmission slide member 153 is slidably disposed in a direction toward / away from the molding die assembly 11 and is rotationally restricted. For example, the transmission slide member 153 is slidably fitted into a groove in the second outer mold member 212. The transmission slide member 153 is provided with two fixing portions 1531 for fixing the rotatable threaded core 12 and abutting against the opposite end faces of the second gear 152. For example, the fixing part 1531 is implemented as a rotary bearing, the threaded core 12 is rotatably fixed inside the two rotary bearings, and the two end faces of the two rotary bearings respectively abut against the opposite end faces of the second gear 152. The elastic element 154 (spring) is connected between the molding die (the anti-rotation element 19 fixed on the second molding die 112) and the transmission slide 153 to provide the transmission slide 153 with a spring force to drive the transmission slide 153 to move away from the molding die assembly 11 to reset.

[0060] Therefore, during the mold closing process, the moving drive member 131 first drives the transmission sliding member 153 to slide towards the molding mold assembly 11, thereby causing the transmission sliding member 153 to drive the second gear 152 to move from the second end 1512 of the first gear 151 to the first end 1511 and drive the threaded core 12 to extend into the molding mold assembly 11 to reach its axial position. Then, the second gear 152 is driven to rotate by the rotating drive member 132. The rotation of the second gear 152 drives the threaded core 12 to rotate, thereby causing the circumferential position of the threaded core 12 to reach its position. Thus, the mold closing of the threaded core 12 is completed, and at this time, the elastic member 154 is in a compressed state. During the mold opening process, when at least two of the molding molds are far apart and the product 900 is fixed to one of the molding molds (the second molding mold 112), the moving drive 131 retracts first, giving the transmission slide 153 a degree of freedom to retract. At this time, the rotating drive 132 drives the first gear 151 to rotate the second gear 152. The rotation of the second gear 152 causes the threaded core 12 to rotate internally within the product 900, thereby causing the threaded core 12 to rotate and retract from the product 900. The retraction of the threaded core 12 causes the transmission slide 153 and the second gear 152 to retract, thereby causing the second gear 152 to move along the direction from the first end 1511 to the second end 1512 of the first gear 151. Simultaneously, the elastic element 154 resets, providing elastic force to drive the transmission slide 153 to slide away from the molding mold assembly 11 and return to a position that can be driven again by the moving drive 131, so as to facilitate being driven again by the moving drive 131 to close the mold again. Thus, via the transmission assembly 15, the moving drive 131 can drive the threaded core 12 to move and close the mold, and the rotating drive 132 can drive the threaded core to rotate and close the mold and to rotate and demold.

[0061] In other examples, see Figure 3 The molding die assembly 11 and the threaded core 12 are multiple and correspond one-to-one. The transmission assembly 15 can also be multiple sets, each corresponding one-to-one with the multiple threaded cores 12. The multiple threaded cores 12 rotate synchronously under the drive of the same drive shaft 1321 and the transmission of the multiple sets of transmission assemblies 15. This is beneficial to improve the driving efficiency of the drive shaft 1321, and facilitates the simultaneous monitoring of multiple threaded cores 12 by monitoring the rotation stroke of the same drive shaft 1321. It also facilitates the subsequent arrangement and operation of the sensing assembly 14 and reduces the arrangement cost.

[0062] Optionally, the mold 100 further includes a drive assembly. The drive assembly is connected between multiple sets of the transmission assemblies 15 and the drive shaft 1321, so that multiple sets of the transmission assemblies 15 can simultaneously receive the drive from the drive shaft 1321 to drive multiple threaded cores 12 to rotate synchronously.

[0063] Optionally, see Figure 2 The driving assembly includes a driving gear 171 and multiple sets of driven gears. The driving gear 171 is connected to the drive shaft 1321. The multiple sets of driven gears mesh on the outer periphery of the driving gear 171 and are connected to the multiple threaded cores 12 in a one-to-one transmission manner, so as to drive the multiple sets of transmission assemblies 15 to drive the multiple threaded cores 12 to rotate synchronously under the drive of the driving gear 171.

[0064] Optionally, each set of driven gears includes multiple driven gears. The multiple driven gears include a first driven gear 172 and a second driven gear 173, wherein the multiple driven gears mesh with each other, and at least one driven gear meshes with the driving gear 171, and at least another driven gear meshes with the first gear 151, so as to drive the first gear 151 to rotate when the driving gear 171 is driven to rotate. Thus, a transmission connection is achieved between the first gear 151 and the drive shaft 1321 of the rotary drive member 132.

[0065] See Figure 1 and Figure 2 The sensing assembly 14 includes a sensing mating member 142 and at least one sensing element 141. One of the sensing element 141 and the sensing mating member 142 is synchronously rotatably connected to the drive shaft 1321 so that it can rotate relative to the other.

[0066] As an example, the sensing element 141 is fixed in place, and the sensing mating member 142 is rotatably connected to the drive shaft 1321, so that when the drive shaft 1321 drives the threaded core 12 to rotate, the sensing mating member 142 rotates relative to the sensing element 141. In this case, since the sensing element 141 remains fixed, it is advantageous to ensure the sensing stability of the sensing element 141 and the stability of its electrical connection with other electrical components (e.g., cables). Specifically, a mounting member 143 is fixed to the housing of the rotary drive member 132, and the sensing element 141 is fixed to the mounting member 143 to remain stationary. When the rotary drive 132 is a dual-axis drive motor, the dual-axis drive motor has a synchronous shaft 1322 that is coaxial with the drive shaft 1321 and rotates synchronously. The sensing engagement member 142 can be fixed to the synchronous shaft 1322 so that the sensing engagement member 142 can rotate synchronously with the synchronous shaft 1322. Since the rotation of the synchronous shaft 1322 is synchronous with the drive shaft 1321, the sensing engagement member 142 is equivalent to being synchronously connected to the drive shaft 1321. Therefore, since the synchronous shaft 1322 and the drive shaft 1321 are located at opposite ends of the dual-axis drive motor, the operating space around the synchronous shaft 1322 is large, which facilitates the arrangement of the sensing element 141 and the sensing engagement member 142. Of course, it can be understood that when the drive motor is a single-axis drive motor, the sensing element 141 or the sensing engagement member 142 can also be directly fixed to the drive shaft 1321 to rotate synchronously with the drive shaft 1321, which is also within the scope of protection of this disclosure. In addition, the present disclosure may also be that the sensing mating member 142 is fixedly installed, and the sensing element 141 is connected to the driving shaft 1321 in a synchronous rotational manner with the driving shaft 1321, so that when the driving shaft 1321 drives the threaded core 12 to rotate, the sensing element 141 rotates relative to the sensing mating member 142. The above examples are also within the protection scope of the present disclosure.

[0067] The sensing mating member 142 is provided with at least one sensing part 1421 for being sensed by the sensing element 141 to cause a change in the sensing signal output by the sensing element 141; the sensing signal is used to determine the rotational stroke of the drive shaft 1321.

[0068] Optionally, the sensing unit 1421 may be of at least two types, including a plurality of first sensing units 1421a located on the same circular path and a second sensing unit 1421b located outside the circular path.

[0069] At least two sensing elements 141 include a first sensing element 141a and a second sensing element 141b. The relative rotation path of the first sensing element 141a includes the sensing position of each of the first sensing parts 1421a, and the first sensing element 141a is implemented as a first sensor that senses the rotation through a plurality of the first sensing parts 1421a and outputs a plurality of first sub-signals so that the number of outputs of the first sub-signals reflects the mold closing rotation angle. That is, the first sensing element 141a outputs a first sub-signal once it rotates through one of the first sensing parts 1421a. Since the plurality of first sensing parts 1421a are evenly distributed in the sensing mating member 142, the included angle between two adjacent first sensing parts 1421a is predetermined. The mold closing rotation angle is the product of the number of outputs and the included angle. Therefore, the more times the first sub-signals are contained in the output sensing signal, the larger the mold closing rotation angle; the fewer times the first sub-signals are contained, the smaller the mold closing rotation angle. Therefore, the number of outputs of the first sub-signals in the output sensing signal can reflect the mold closing rotation angle.

[0070] The second sensing element 141b, relative to the rotation path, includes the sensing position of the second sensing part 1421b. The second sensing part 1421b is configured to output a number of second sub-signals after rotating through it several times, thus reflecting the number of demolding rotations via the number of output second sub-signals. In other words, the second sensor outputs one second sub-signal for each rotation of the second sensing part 1421b. Therefore, the more times the output sensing signal contains the second sub-signals, the greater the number of demolding rotations; the fewer times it contains the second sub-signals, the smaller the number of demolding rotations. Thus, the number of second sub-signals in the output sensing signal reflects the number of demolding rotations.

[0071] Optionally, the first sensing unit 1421a and the second sensing unit 1421b have different structural features, and at least two of the sensing elements 141 are implemented as different types of proximity switches for sensing different structural features. This proximity switch is low in cost, easy to integrate and arrange, and can operate independently without easily interfering with each other, resulting in high reliability.

[0072] As an example, the first sensing element 1421a is implemented as a hole structure / tooth structure. The first sensing element 141a is implemented as a proximity switch that senses a plurality of said hole structures / tooth structures to reflect the mold closing rotation angle via the number of times a proximity sub-signal is output. For example, it is a laser-type proximity switch / ultrasonic proximity switch. Taking twelve said hole structures evenly distributed circumferentially along the sensing mating member 142 as an example, with an included angle of thirty degrees between two adjacent said hole structures, the first sensing element 141a outputs one proximity sub-signal when it approaches one said hole structure during the mold closing rotation of the threaded core 12, thus reflecting a thirty-degree rotation of the drive shaft 1321. The first sensing element 141a outputs two proximity sub-signals when it approaches two said hole structures during the mold closing rotation of the threaded core 12, thus reflecting a sixty-degree rotation of the drive shaft 1321. It is understood that the number of said hole structures, the included angle between two adjacent said hole structures, and the reflected mold closing rotation angle are not limited to this and can be adaptively adjusted.

[0073] As an example, the second sensing part 1421b is implemented as a metal part, and the second sensing element 141b is implemented as a second proximity switch, such as an inductive proximity switch, whose relative rotation path includes the proximity position of the metal part. Thus, each time the second proximity switch rotates past the proximity position of the metal part, the second proximity switch senses the metal part and generates a proximity sub-signal. During the demolding process of the threaded core 12, the number of rotations of the drive shaft 1321 can be determined by the number of proximity sub-signals contained in the second sensing signal. Therefore, the number of demolding rotations of the drive shaft 1321 can be determined based on the number of proximity sub-signals contained in the second sensing signal.

[0074] The control element is connected to the sensing element 141 and the rotary drive 132 respectively, so as to determine that the threaded end 121 of the threaded core 12 has rotated into place according to the rotation stroke reaching a preset stroke, and control the rotary drive 132 to stop driving according to the rotation position. Thus, during the mold closing rotation and / or demolding rotation of the drive shaft 1321, when the threaded end 121 of the threaded core 12 has rotated into place, the sensing element 141 can promptly sense it, and the control element can control the rotary drive 132 to stop driving in a timely manner according to the rotation position of the threaded end 121. The mold 100 of this disclosure can monitor whether the threaded end of the threaded core 12 has rotated into place and prevent over-rotation.

[0075] Optionally, the rotation into position includes at least one of the following conditions:

[0076] (1) The rotational stroke sensed by the sensing element 141 includes the mold closing rotation angle of the drive shaft 1321. The control element determines the circumferential position of the mold entry end 121 when the mold closing rotation angle reaches a preset angle, and controls the rotation drive 132 to stop driving. Thus, the mold 100 of this disclosure can monitor whether the circumferential position of the mold entry end 121 of the threaded core 12 is in the mold closing position and prevent excessive mold closing rotation.

[0077] Figure 5 This is a schematic diagram of the structure of some components of the mold according to an embodiment of the present disclosure. Figure 6 yes Figure 5 Exploded view of the components. (See also...) Figure 2 , Figure 5 and Figure 6 The mold 100 further includes a mating core 16. The mating core 16 is movably disposed between the at least two molding components, and is located on opposite sides of the molding mold assembly 11 with the threaded core 12. It has a mold-closing mating portion 161 for circumferentially mating with the entry end 121 when the mold is closed. That is, when the mold is closed, the gap space between the at least two molding components, the mating core 16, and the threaded core 12 forms a mold cavity for molding the product 900. It is understood that when the mold 100 is closed, the mating core 16 extends into the molding mold assembly 11 before the threaded core 12, and after the threaded core 12 extends into the molding mold assembly 11 and rotates into place, the entry end 121 of the threaded core 12 mates with the mold-closing mating portion 161. Furthermore, during the above process, when the die-entry end 121 of the threaded core 12 rotates into place, the die-entry end 121 can be controlled to stop rotating in time, which helps to prevent the die-entry end 121 from colliding with the die-closing docking part 161, and helps to solve the problem of die collision in the actual production process of the mold 100, thereby achieving the purpose of stable production.

[0078] (2) The rotational stroke sensed by the sensing element 141 includes the number of demolding rotations of the drive shaft 1321. The control element determines that the mold entry end 121 has reached the demolding position based on the number of demolding rotations reaching a preset number of rotations, and controls the rotation drive 132 to stop driving. Thus, the mold 100 of this disclosure can monitor whether the thread of the threaded core 12 has reached the demolding position, which helps to avoid the situation of the thread spinning freely after complete demolding and the thread not being completely demolded. For example, for the core assembly in the accompanying drawings of this disclosure, the preset number of rotations is twelve. When the number of demolding rotations reaches twelve, the thread of the threaded core 12 is completely demolded, and the control element controls the rotation drive 132 to stop driving.

[0079] Optionally, the threaded entry end 121 of the threaded core 12 extends to one axial end, so that the axial end of the threaded core 12 can rotate and exit the product 900 along with its thread. Thus, when the threaded core 12 rotates and exits the product 900, the threaded core 12 is also completely exited. Therefore, when the number of demolding rotations reaches a preset number, and the threaded core 12 is completely demolded, the entire threaded core 12 is also completely demolded. At this point, the drive is immediately stopped, which helps avoid the threaded core 12 wasting energy by spinning idly after exiting. Furthermore, stopping the drive only after the threaded core 12 is completely demolded ensures that when the product 900 is subsequently ejected from the mold 100, the product 900 will not be interfered with by the not-fully-demolded threaded core 12 and can be smoothly ejected.

[0080] Of course, it is understood that this disclosure may also include a single sensing element and a single sensing unit, wherein the sensing element can determine the rotation angle of the drive shaft during mold closing and the number of rotations during mold demolding by sensing the sensing unit. For example, the sensing unit may be a magnet, and the sensing element may be a Hall sensor for sensing the relative rotation of the magnet to determine the relative rotation angle and / or the relative number of rotations of the magnet, wherein the relative rotation angle and / or the relative number of rotations of the magnet is consistent with the rotation angle and / or the number of rotations of the drive shaft, thereby determining the rotation angle and / or the number of rotations of the drive shaft.

[0081] Figure 7 This is a structural diagram of another component of this disclosure. See also... Figure 2 and Figure 7 The mold 100 further includes an ejection assembly 181 movably disposed in the molding die along the ejection direction for ejecting the product 900. Specifically, the ejection assembly 181 includes one or more ejector pins 1811 movably disposed in the molding die (second molding die 112), for example, the ejection assembly 181 includes the four ejector pins 1811 shown in the figure. The ejector pins 1811 are used to move and eject the product 900 after the threaded core 12 has disengaged from the product 900, thereby detaching the product 900 from the molding die and completing the complete demolding of the product 900. Meanwhile, in the aforementioned example, due to the monitoring by the sensing element 141 and the corresponding control by the control element, it can be ensured that the threaded core 12 is completely disengaged from the product 900, thus ensuring smooth ejection of the product 900.

[0082] Optionally, the mold 100 further includes a floating member 182 and a spring member 183. The floating member 182 is movably disposed along the ejection direction and connected to the ejection assembly 181 so as to drive the ejection assembly 181 to eject the product 900 when driven to float toward the molding mold assembly 11. The spring member 183 is disposed between the floating member 182 and the molding mold assembly 11 to provide a spring force to the floating member 182 to drive the floating member 182 to reset.

[0083] Optionally, see Figures 4 to 6 The mold includes an anti-rotation part 122 and an anti-rotation member 19. The anti-rotation part 122 is fixed to the threaded core 12. The anti-rotation member 19 is fixed in place (fixed to the second molding part 112) and is configured to engage with the anti-rotation part 122 when the circumferential position of the mold entry end 121 is in place, thereby limiting the rotation of the threaded core 12. Therefore, even if the stopping drive of the rotation drive member 132 is delayed, it can be ensured that the threaded core 12 will not rotate excessively during mold closing, thus providing a double guarantee that the circumferential position of the mold entry end 121 will not rotate excessively during mold closing.

[0084] Optionally, see Figure 2 The mold 100 further includes at least two outer mold parts. The at least two outer mold parts are correspondingly fixed to the outer sides of the at least two forming mold parts, and one of the outer mold parts is fixed with an inclined guide 213. The mating core 16 is slidably disposed on the other outer mold part, and has a sliding portion for the inclined guide to be slidably inserted along the inclined direction for guiding its sliding in and out. For example, the first outer mold part 211 is fixed with the inclined guide 213, and the second outer mold part 212 is fixed with a slidable mating core 16 that slidably engages with the inclined guide 213 along the inclined direction. Thus, when the at least two outer mold parts move closer to each other to close the at least two forming mold parts, the mating core 16 will move towards the forming mold assembly 11 due to the guidance of the inclined guide 213 to enter the closing position between the at least two forming mold parts. When at least two outer mold parts move away from each other to open the mold of the at least two molding parts, the mating core 16 will move out of the at least two molding parts due to the guidance of the inclined guide 213, so as to demold away from the product 900.

[0085] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the protection scope of this disclosure.

Claims

1. A mold, characterized in that, include: At least one molding assembly, including at least two molding parts that are movable relative to each other along the mold opening / closing direction to approach the mold closing / move away from the mold; At least one threaded core is movable in and out and rotatably disposed between the at least two molding components, so that when the mold is closed, it moves and rotates to the position where the threaded portion is located inside the molding component to cooperate with the molded product, and rotates out of the product when the mold is opened; The drive assembly includes a moving drive component and a rotating drive component, wherein the drive shaft of the rotating drive component and the moving drive component are connected to the threaded core via a transmission assembly to drive the threaded core to move and rotate. A sensing assembly includes a sensing mating member and at least one sensing element, wherein one of the sensing element and the sensing mating member is synchronously rotatably connected to the drive shaft so as to be rotatable relative to the other; wherein the sensing mating member is provided with at least one sensing portion for being sensed by the sensing element to cause a change in the sensing signal output by the sensing element; the sensing signal is used to determine the rotational stroke of the drive shaft; and A control element is connected to the sensing element and the rotary drive respectively, so as to determine the insertion end of the threaded core is rotated into position according to the rotation stroke reaching the preset stroke, and control the rotary drive to stop driving according to the rotation position.

2. The mold according to claim 1, characterized in that, The rotation into position includes at least one of the following conditions: (1) The rotational stroke sensed by the sensing element includes the mold closing rotation angle of the drive shaft. The control element determines that the mold entry end has reached the mold closing position according to the mold closing rotation angle reaching the preset angle, and controls the rotation drive to stop the mold closing drive. (2) The rotational stroke sensed by the sensing element includes the number of demolding rotations of the drive shaft. The control element determines that the mold entry end has reached the demolding position based on the number of demolding rotations reaching the preset number of rotations, and controls the rotation drive to stop the demolding drive.

3. The mold according to claim 2, characterized in that, The demolding of the threaded core also includes at least one of the following conditions: (1) The threaded end of the threaded core extends to one of its axial ends so that the axial end of the threaded core can be rotated into place with the threaded demolding and ejected from the product. (2) The mold further includes: a mating core, which is movably disposed between the at least two molding parts and located on opposite sides of the molding mold assembly with the threaded core, and is provided with a mold closing mating part for circumferential mating when the mold entry end is closed.

4. The mold according to claim 1, characterized in that, The sensing element is of at least two types, including multiple first sensing elements located on the same circular path and second sensing elements located outside the circular path; The at least two sensing elements include: a first sensing element, which, relative to the rotation path, includes the sensing position of each of the first sensing parts, and is configured to sense the rotation through the plurality of first sensing parts and output a plurality of first sub-signals so as to reflect the mold closing rotation angle of the drive shaft via the number of outputs of the first sub-signals; and a second sensing element, which, relative to the rotation path, includes the sensing position of the second sensing part, and is configured to sense the rotation through the second sensing part a plurality of times and output a plurality of second sub-signals so as to reflect the number of demolding rotations of the drive shaft via the number of outputs of the second sub-signals.

5. The mold according to claim 4, characterized in that, The first sensing part and the second sensing part have different structural features, and at least two of the sensing elements are implemented as different types of proximity switches for sensing different structural features.

6. The mold according to claim 1, characterized in that, There are multiple forming mold components and multiple threaded cores, and they are all one-to-one corresponding. The multiple threaded cores rotate synchronously under the drive of the same drive shaft and the transmission of multiple sets of transmission components.

7. The mold according to claim 1 or 6, characterized in that, Each group of the transmission components includes: The first gear is connected to the drive shaft and has a first end and a second end that are close to and far from the molding die assembly, respectively. A second gear, slidably meshing with the first gear between the first end and the second end, and rotatably fitted around the threaded core to drive the threaded core to rotate, so that it slides from the second end to the first end and drives the threaded core to rotate during mold closing, and slides from the second end to the first end and drives the threaded core to rotate during mold opening; and The transmission slide member is slidably and rotationally restricted in the direction toward / away from the molding die assembly, and has two fixed parts that abut against opposite sides of the second gear for fixing a rotatable threaded core, and is connected to the moving drive member.

8. The mold according to claim 7, characterized in that, Each of the transmission components further includes an elastic element connected between the molding die and the transmission slider to provide a spring force that drives the transmission slider to move away from the molding die to reset.

9. The mold according to claim 6, characterized in that, Also includes: The drive gear is connected to the drive shaft; And multiple sets of driven gears mesh on the outer periphery of the driving gear and are connected to the multiple threaded cores in a one-to-one transmission manner to drive the multiple threaded cores to rotate synchronously.

10. The mold according to claim 1, characterized in that, Also includes: An ejection assembly movably inserted through the molding die in the ejection direction to eject the product; and / or The mold further includes: an anti-rotation portion fixed to the threaded core; and an anti-rotation member configured to engage with the anti-rotation portion when the circumferential position at the die inlet end is reached, thereby limiting the rotation of the threaded core; and / or The mold further includes: at least two outer mold parts, correspondingly fixed on the outer sides of at least two forming mold parts, and one of the outer mold parts is fixed with an inclined guide extending at an angle; and a mating core, which is slidably disposed on the other outer mold part and can slide in and out of the forming mold part, and is provided with a sliding portion for the inclined guide to be slidably inserted in the inclined direction for guiding the sliding in and out.

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