An injection mold comprising a threaded product rotation demolding structure

Abstract

The application provides an injection mold with a threaded product rotating demolding structure, comprising a mold body and a demolding structure, the demolding structure comprising a threaded core, a first bearing, a second bearing and a sleeve; the first bearing, the second bearing and the sleeve are sequentially sleeved on the threaded core from top to bottom, the threaded core comprises a threaded rod and a core, the core and the threaded rod are respectively provided with mutual cooperation anti-extrusion structures; the sleeve is threadedly connected with the threaded rod; the first bearing is fixed near the anti-extrusion structure of the core; the second bearing is fixed near the anti-extrusion structure of the threaded rod; when the mold body is opened, the first movable mold plate drives the threaded core to rise through the first bearing and the second bearing; at the same time, the threaded core is rotated when rising through the thread cooperation between the sleeve and the threaded rod. The synchronous mold opening stroke and the demolding action realize lossless demolding, ensure the forming quality of the product thread, and significantly reduce the manufacturing cost of the mold and the subsequent maintenance complexity.

Description

Technical Field

[0001] This application relates to the field of injection molds, and more specifically to an injection mold that includes a rotating demolding structure for threaded products. Background Technology

[0002] Plastic products need to be cast into shape through the internal cavity structure of injection molds. For plastic products with threaded structures, injection molds generally use corresponding threaded cores to form the threaded structure of the plastic products. After the product is formed, the threaded cores are removed from the product and separated.

[0003] In order to facilitate the separation of the threaded core from the product, existing technologies generally use an external drive system as the driving force for the rotation of the threaded core, such as a hydraulic cylinder or hydraulic motor, a gear and rack mechanism, etc.

[0004] Driving the threaded core to rotate and demold via an external hydraulic system can easily cause deformation of the product's thread structure or even damage to the tail tooth, increasing product production costs. In addition, the additional drive components also increase the manufacturing and maintenance costs of the device. While driving the threaded core to rotate via a rack and pinion mechanism simplifies the external drive source, the stability of the transmission chain is insufficient, and accommodating the rack and pinion mechanism and combining it with the threaded core would result in an excessively large device size. Utility Model Content

[0005] In view of the aforementioned problems, this application is made to provide an injection mold suitable for rotary demolding of threaded products that overcomes or at least partially solves the aforementioned problems, comprising:

[0006] An injection mold including a rotating demolding structure for threaded products includes a mold body and a demolding structure. The demolding structure includes a threaded core, a first bearing, a second bearing, and a threaded sleeve. The threaded sleeve is used to be fixedly connected to a fixed template of the mold body. The first bearing and the second bearing are used to be fixedly connected to a first movable template of the mold body.

[0007] The first bearing, the second bearing, and the toothed sleeve are respectively fitted onto the threaded core from top to bottom. The threaded core includes a threaded rod and a core. The core and the threaded rod are respectively provided with mutually cooperating anti-dislodgement structures.

[0008] Wherein, the dental brace is threadedly connected to the threaded rod; the first bearing is fixed near the anti-dislodgement structure of the core; and the second bearing is fixed near the anti-dislodgement structure of the threaded rod;

[0009] When the mold body is opened, the first moving template drives the threaded core to rise through the first bearing and the second bearing; at the same time, through the threaded engagement of the toothed sleeve and the threaded rod, the threaded core rotates during the rise.

[0010] Furthermore, the top of the core is provided with a threaded structure.

[0011] Furthermore, the first moving template is provided with an upper limit plate and a lower limit plate. The first bearing and the second bearing are respectively located between the upper limit plate and the lower limit plate. The upper limit plate is provided with an opening for the core to pass through, and the lower limit plate is provided with an opening for the threaded rod to pass through. The first moving template clamps and fixes the first bearing, the second bearing and the threaded core through the upper limit plate and the lower limit plate.

[0012] Furthermore, the mold body also includes a second moving template and a push plate, the push plate being located between the first moving template and the second moving template, the second moving template being fixedly provided with a front mold core, and the push plate being fixedly provided with a rear mold core.

[0013] Furthermore, the front mold core has inner grooves at its four corners, and the rear mold core has protruding pillars at its four corners corresponding to the inner grooves of the front mold core. The front mold core and the rear mold core each have a cavity, and after mold closing, the cavities merge to form an injection cavity.

[0014] Furthermore, the push plate is provided with a core hole corresponding to the position of the core, and the core passes through the core hole through the push plate into the injection cavity.

[0015] Furthermore, the mold body also includes a first cooling channel and a second cooling channel, the second cooling channel being disposed within the front mold core, and the first cooling channel being disposed within the first moving mold plate.

[0016] Furthermore, at least two slide rails are provided on both sides of the mold body. The slide rails are provided with a first slide rail section and a second slide rail section. The first slide rail section is fixedly connected to the first moving template by a first slide rail screw, and the second slide rail section is fixedly connected to the second moving template by a second slide rail screw.

[0017] Furthermore, the mold body also includes a base, and the fixed template is located between the first moving template and the base, and is fixedly connected to the base.

[0018] Furthermore, the mold body also includes a cover plate, which is fixedly connected to the second moving template, and the cover plate is fixedly provided with an injection positioning ring.

[0019] This application has the following advantages:

[0020] In the embodiments of this application, addressing the problems of easy damage to the thread structure and high mold manufacturing costs caused by separating the threaded core and product through an external drive system in the prior art, this application provides a solution for rotational demolding using a threaded core in conjunction with a toothed sleeve and dual bearings. Specifically, the demolding structure includes a threaded core, a first bearing, a second bearing, and a toothed sleeve; wherein, the toothed sleeve is used to fixally connect to the fixed template of the mold body; the first bearing and the second bearing are used to fixally connect to the first movable template of the mold body; the first bearing, the second bearing, and the toothed sleeve are respectively sequentially sleeved on the threaded core from top to bottom, the threaded core including a threaded rod and a core, the core and the threaded rod respectively having mutually cooperating anti-detachment structures; wherein, the toothed sleeve is threadedly connected to the threaded rod; the first bearing is fixed near the anti-detachment structure of the core; and the second bearing is fixed near the anti-detachment structure of the threaded rod; when the mold body is opened, the first movable template drives the threaded core to rise through the first bearing and the second bearing; simultaneously, through the threaded engagement of the toothed sleeve and the threaded rod, the threaded core rotates during the rise. Using its own mold opening action as a power source, the threaded core is driven by dual bearings to rotate in conjunction with the toothed sleeve during the upward process, synchronizing the mold opening stroke and the demolding action. This solves the problem of easy product damage and high equipment cost caused by the need for an external drive system to drive the threaded core to rotate during the demolding of threaded structures. It achieves the technical effect of non-destructive demolding of threaded products, ensures the forming quality of the product threads, eliminates the need for a complex external drive system, and significantly reduces the manufacturing cost, energy consumption and subsequent maintenance complexity of the mold. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an injection mold including a threaded product rotation demolding structure according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the mold body of an injection mold that includes a threaded product rotation demolding structure, according to an embodiment of this application.

[0024] Figure 3 This is an exploded view of an injection mold including a threaded product rotation demolding structure according to an embodiment of this application, including the mold body and the demolding structure;

[0025] Figure 4 This is a schematic diagram of the demolding structure of an injection mold that includes a threaded product rotation demolding structure, according to an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the cooling system of an injection mold including a threaded product rotation demolding structure, according to an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the front and rear mold cores of an injection mold that includes a rotating demolding structure for threaded products, according to an embodiment of this application.

[0028] Figure 7 This is a schematic diagram of the slide rail of an injection mold that includes a threaded product rotation demolding structure, according to an embodiment of this application.

[0029] The reference numerals in the accompanying drawings are as follows:

[0030] 100. Mold body; 110. First moving mold plate; 111. Upper limit plate; 112. Lower limit plate; 113. First cooling channel; 120. Fixed mold plate; 130. Second moving mold plate; 131. Front mold core; 132. Inner groove; 133. Second cooling channel; 140. Push plate; 141. Rear mold core; 142. Protruding pillar; 143. Core hole; 150. Slide rail; 151. First slide rail section; 152. First slide rail screw; 153. Second slide rail section; 154. Second slide rail screw; 160. Base; 170. Cover plate; 171. Injection positioning ring; 200. Demolding structure; 210. Threaded core; 211. Threaded rod; 212. Core; 220. Gear sleeve; 230. First bearing; 240. Second bearing. Detailed Implementation

[0031] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] The inventors discovered through analysis of existing technologies that, due to the threaded structure of the product, existing molds for injection molding of threaded products require a rotating core to remove the product during demolding, rather than direct pull-out. This rotation of the threaded core relies on an external drive system, meaning that in addition to the mold itself, extra mechanical components are needed. This significantly increases the manufacturing cost of the mold and makes the equipment larger. Furthermore, demolding by connecting an external drive system to the threaded core and twisting it can easily cause deformation of the product's thread structure or even damage to the tail thread, further increasing production costs.

[0033] Reference Figure 1 This illustration shows a schematic diagram of an injection mold including a threaded product rotational demolding structure according to an embodiment of this application. The mold includes a mold body 100 and a demolding structure 200. The demolding structure 200 includes a threaded core 210, a first bearing 230, a second bearing 240, and a threaded sleeve 220. The threaded sleeve 220 is fixedly connected to the fixed template 120 of the mold body 100. The first bearing 230 and the second bearing 240 are fixedly connected to the first moving template 110 of the mold body 100. The first bearing 230, the second bearing 240, and the threaded sleeve 220 are sequentially fitted onto the threaded core 210 from top to bottom. The threaded core 210 includes a threaded rod 211 and a core 212. The core 212 and the threaded rod 211 are respectively provided with mutually cooperating anti-disengagement structures. The threaded sleeve 220 is threadedly connected to the threaded rod 211. The first bearing 230 is fixed near the anti-disengagement structure of the core 212, and the second bearing 240 is fixed near the anti-disengagement structure of the threaded rod 211. When the mold is opened, the first moving template 110 drives the threaded core 210 to rise through the first bearing 230 and the second bearing 240. At the same time, the threaded sleeve 220 and the threaded rod 211 are threaded together, causing the threaded core 210 to rotate during the rise.

[0034] In the embodiments of this application, the mold's own opening action is used as the power source. The first bearing 230 and the second bearing 240 drive the threaded core 210 to rotate in conjunction with the toothed sleeve 220 during the upward process. This synchronizes the mold opening stroke and the demolding action, solving the problem of easy product damage and high equipment cost caused by the need for an external drive system to drive the threaded core 210 to rotate during the demolding of threaded structures. It achieves the technical effect of non-destructive demolding of threaded products, ensures the forming quality of the product threads, eliminates the need for a complex external drive system, and significantly reduces the manufacturing cost, energy consumption, and subsequent maintenance complexity of the mold.

[0035] The following will further describe an injection mold that includes a threaded product rotation demolding structure in this exemplary embodiment.

[0036] In one embodiment of this application, the specific features of an injection mold including a threaded product rotation demolding structure can be further described in conjunction with the following description.

[0037] like Figure 1 As shown, in one embodiment of this application, a mold body 100 and a demolding structure 200 are included. The demolding structure 200 includes a threaded core 210, a first bearing 230, a second bearing 240, and a threaded sleeve 220. The threaded sleeve 220 is used to be fixedly connected to the fixed template 120 of the mold body 100. The first shaft 500 and the second bearing 240 are used to be fixedly connected to the first moving template 110 of the mold body 100. The first bearing 230, the second bearing 240, and the threaded sleeve 220 are respectively sequentially sleeved from top to bottom on the threaded core 210. The threaded core 210 includes a threaded rod 211 and a core 212. The core 212 and the threaded rod 211 are respectively provided with mutually cooperating anti-disengagement structures; wherein, the toothed sleeve 220 is threadedly connected to the threaded rod 211; the first bearing 230 is fixed near the anti-disengagement structure of the core 212; and the second bearing 240 is fixed near the anti-disengagement structure of the threaded rod 211; when the mold is opened, the first moving template 110 drives the threaded core 210 to rise through the first bearing 230 and the second bearing 240; at the same time, through the threaded engagement of the toothed sleeve 220 and the threaded rod 211, the threaded core 210 rotates during the rise; the top end of the core 212 is provided with a threaded structure.

[0038] It should be noted that the dental sleeve 220, the first bearing 230, and the second bearing 240 are the core components that generate the rotational effect of the demolding structure 200. The anti-detachment structure prevents the core 212 and the threaded rod 211 from disengaging from the first bearing 230 and the second bearing 240 during the upward movement. The first bearing 230 and the second bearing 240 not only drive the threaded core 210 upward but also provide the threaded core 210 with the means to rotate. During the upward movement, the threaded core 210 rotates within the mold body 100 in conjunction with the dental sleeve 220, thereby unscrewing from the product during the mold opening process. The top of the core 212 is provided with a threaded structure, which can be customized according to the required thread shape of the product.

[0039] like Figure 1-3As shown, in one embodiment of this application, the push plate 140 is located between the first moving template 110 and the second moving template 130; the fixed template 120 is located between the first moving template 110 and the base 160 and is fixedly connected to the base 160; the cover plate 170 is fixedly connected to the second moving template 130, and the cover plate 170 is fixedly provided with an injection molding positioning ring 171.

[0040] It should be noted that the fixed template 120 is fixedly connected to the base 160 as a fixed component of the mold body 100, and the first moving template 110, the second moving template 130 and the push plate 140 are moving components of the mold body 100, which play the role of opening the mold and driving the demolding structure to work synchronously. The cover plate 170 is fixedly connected to the second moving template 130 as a connecting component between the mold body 100 and the external injection molding mechanism.

[0041] like Figure 4 As shown, in one embodiment of this application, the first moving template 110 is provided with an upper limit plate 111 and a lower limit plate 112. The first bearing 230 and the second bearing 240 are respectively located between the upper limit plate 111 and the lower limit plate 112. The upper limit plate 111 is provided with an opening for the core 212 to pass through, and the lower limit plate 112 is provided with an opening for the threaded rod 211 to pass through. The first moving template 110 clamps and fixes the first bearing 230, the second bearing 240 and the threaded core 210 through the upper limit plate 111 and the lower limit plate 112.

[0042] It should be noted that the upper limit plate 111 and the lower limit plate 112 are fixed to the first moving template 110 by threaded connection, thereby stably clamping and fixing the components between the upper limit plate 111 and the lower limit plate 112, forming a multi-level structure of “upper limit plate 111 - first bearing 230 - core anti-disengagement structure - threaded rod anti-disengagement structure - second bearing 240 - lower limit plate 112” that are tightly connected from top to bottom.

[0043] In one specific implementation, the upper limit plate 111 and the lower limit plate 112 have the dual functions of limiting and preventing the first bearing 230 and the second bearing 240 from being sleeved on the threaded rod 211 and the core 212, and fixing the position of the threaded core 210 in the mold body 100, so as to ensure the synchronous rising and rotational stability of the threaded core 210 during the mold opening process.

[0044] like Figure 5-6As shown, in one embodiment of this application, the second moving template 130 is fixedly provided with a front mold core 131, and the push plate 140 is fixedly provided with a rear mold core 141; the four corners of the front mold core 131 are provided with inner grooves 132, and the four corners of the rear mold core 141 are provided with protruding posts 142 corresponding to the inner grooves 132 of the front mold core 131; the front mold core 131 and the rear mold core 141 are respectively provided with cavities, and after mold closing, the cavities are combined to form an injection cavity; the push plate 140 is provided with a core hole 143 for the core 212 to pass through, and the core 212 passes through the core hole 143 through the push plate 140 into the injection cavity.

[0045] It should be noted that the inner groove 132 and the protruding post 142 are positioned to ensure accurate alignment of the front mold core 131 and the rear mold core 141 during mold closing. This structure also prevents misalignment of the front mold core 131 and the rear mold core 141 during injection molding, ensuring the stability of the injection cavity and the molding quality of the product.

[0046] As an example, the front mold core 131 is fixedly disposed on the second moving mold plate 130, and the rear mold core 141 is fixedly disposed on the push plate 140. During the mold opening process, the second moving mold plate 130 and the push plate 140 are separated, and the front mold core 131 and the rear mold core 141 can be opened simultaneously to open the injection cavity.

[0047] like Figure 5 As shown, in one embodiment of this application, a first cooling channel 600 and a second cooling channel 700 are also included. The second cooling channel 600 is disposed in the front mold core 131, and the first cooling channel 700 is disposed in the first moving mold plate 110.

[0048] In one specific implementation, coolant is introduced into the first cooling channel 113 and the second cooling channel 133. After injection molding is completed, the coolant in the second cooling channel 133 plays a role in cooling and shaping the plastic, while the coolant in the first cooling channel 113 plays a role in cooling and reducing the temperature of the demolding structure, preventing the threaded core 210, the first bearing 230 and the second bearing 240 from getting stuck or even deforming due to the mechanical high temperature and product expansion during rotation.

[0049] like Figure 3 and 7 As shown in one embodiment of this application, at least two slide rails 150 are respectively provided on both sides of the mold body 100. The slide rail 150 is provided with a first slide rail section 151 and a second slide rail section 153. The first slide rail section 151 is fixedly connected to the first moving template 110 by a first slide rail screw 152, and the second slide rail section 153 is fixedly connected to the second moving template 130 by a second slide rail screw 154.

[0050] It should be noted that the first slide rail section 151 and the second slide rail section 153 achieve the function of synchronous mold opening stroke and mold release action.

[0051] In one specific implementation, the first sliding rail screw 152 drives the first moving template 110 to move upward along the first sliding rail section 151 and separate it from the fixed template 120, thereby driving the first bearing 230 and the second bearing 240 to rise. The first bearing 230 and the second bearing 240 drive the threaded core 210 to rise. The threaded engagement between the toothed sleeve 220 and the threaded rod 211 drives the threaded core 210 to rotate, thus performing the demolding action. The second sliding rail screw 154 drives the second moving template 130 to move upward along the second sliding rail section 153 and separate it from the push plate 140, thereby driving the front mold core 131 and the rear mold core 141 to separate and open the injection cavity. When the threaded core 210 is unscrewed from the product, the product falls out of the cavity, achieving the effect of automatic demolding.

[0052] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0053] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0054] The above provides a detailed description of an injection mold with a rotating demolding structure for threaded products provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An injection mold including a rotating demolding structure for threaded products, comprising a mold body and a demolding structure, characterized in that, The demolding structure includes a threaded core, a first bearing, a second bearing, and a toothed sleeve; wherein, the toothed sleeve is used to be fixedly connected to the fixed template of the mold body; the first bearing and the second bearing are used to be fixedly connected to the first movable template of the mold body; The first bearing, the second bearing, and the toothed sleeve are respectively fitted onto the threaded core from top to bottom. The threaded core includes a threaded rod and a core. The core and the threaded rod are respectively provided with mutually cooperating anti-dislodgement structures. Wherein, the dental brace is threadedly connected to the threaded rod; the first bearing is fixed near the anti-dislodgement structure of the core; and the second bearing is fixed near the anti-dislodgement structure of the threaded rod; When the mold is opened, the first moving template drives the threaded core to rise through the first bearing and the second bearing; at the same time, the threaded core rotates as it rises through the threaded engagement of the toothed sleeve and the threaded rod.

2. The injection mold comprising a threaded product rotation demolding structure according to claim 1, characterized in that, The top of the core is provided with a threaded structure.

3. The injection mold comprising a threaded product rotation demolding structure according to claim 1, characterized in that, The first moving template is provided with an upper limit plate and a lower limit plate. The first bearing and the second bearing are respectively located between the upper limit plate and the lower limit plate. The upper limit plate is provided with an opening for the core to pass through, and the lower limit plate is provided with an opening for the threaded rod to pass through. The first moving template clamps and fixes the first bearing, the second bearing and the threaded core through the upper limit plate and the lower limit plate.

4. The injection mold comprising a threaded product rotation demolding structure according to claim 1, characterized in that, The mold body also includes a second moving template and a push plate. The push plate is located between the first moving template and the second moving template. The second moving template is fixedly provided with a front mold core, and the push plate is fixedly provided with a rear mold core.

5. The injection mold comprising a threaded product rotation demolding structure according to claim 4, characterized in that, The front mold core has inner grooves at its four corners, and the rear mold core has protruding pillars at its four corners corresponding to the inner grooves of the front mold core. The front mold core and the rear mold core each have a cavity. After the mold is closed, the cavities merge to form an injection cavity.

6. The injection mold comprising a threaded product rotation demolding structure according to claim 5, characterized in that, The push plate is provided with a core hole for the core to pass through, and the core passes through the core hole into the injection cavity via the push plate.

7. The injection mold comprising a threaded product rotation demolding structure according to claim 4, characterized in that, The mold body also includes a first cooling channel and a second cooling channel, the second cooling channel being disposed within the front mold core, and the first cooling channel being disposed within the first moving mold plate.

8. The injection mold comprising a threaded product rotation demolding structure according to claim 4, characterized in that, At least two slide rails are provided on both sides of the mold body. The slide rails are provided with a first slide rail section and a second slide rail section. The first slide rail section is fixedly connected to the first moving template by a first slide rail screw, and the second slide rail section is fixedly connected to the second moving template by a second slide rail screw.

9. The injection mold comprising a threaded product rotation demolding structure according to claim 1, characterized in that, The mold body also includes a base, and the fixed template is located between the first moving template and the base, and is fixedly connected to the base.

10. The injection mold comprising a threaded product rotation demolding structure according to claim 4, characterized in that, The mold body also includes a cover plate, which is fixedly connected to the second moving template, and the cover plate is fixedly provided with an injection positioning ring.

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