A type of coiled tooth core-pulling molding die
By designing a core-pulling molding die with threaded teeth and utilizing the limiting function of the core rotation component and the positioning pawl, the production problem of injection-molded products with threaded openings and oblique liquid outlet channels was solved, achieving a highly efficient and rapid production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN KANGYUAN PRECISION TECH CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-26
AI Technical Summary
Existing technologies make it difficult to efficiently produce injection molded products with threaded openings and angled liquid outlet channels, especially oil drum caps, which present production challenges.
Design a core-pulling molding die for coiled teeth, including an upper die, a lower die, an upper die core, a lower die core, and a core-pulling mechanism for coiled teeth. Utilize components such as a core rotation component, a moving component, and a positioning pawl to enable the coiled teeth to extend into or retract from the injection molding cavity. Through the limiting and resetting functions of the positioning pawl, ensure the precise insertion of the insert and the rapid core-pulling of the product.
It enables efficient injection molding production of products with screw threads and angled liquid outlet channels, ensuring production efficiency and quality, and enabling rapid mass production.
Smart Images
Figure CN224276016U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of molds, and in particular to a coiled core-pulling mold. Background Technology
[0002] Injection molds are used to form molded products by injecting molten plastic into a mold cavity and then cooling and hardening it. They are widely used in various plastic product industries. For example... Figure 1 The injection-molded product of the oil drum cap 10 shown presents difficulties in injection molding production due to the presence of a screw thread 101 and an oblique liquid outlet channel 102 located on the inner side wall of the screw thread. Utility Model Content
[0003] The purpose of this utility model is to provide a threaded core-pulling mold for injection molding products with threaded openings and angled liquid outlets, which has the advantage of convenient production.
[0004] To achieve the above objectives, the solution of this utility model is:
[0005] A coiled tooth core-pulling molding die includes an upper die, a lower die, an upper die core, a lower die core, and a coiled tooth core-pulling mechanism;
[0006] The upper mold and the lower mold are detachably fitted together. The upper mold core is located on the bottom surface of the upper mold, and the lower mold core is located on the top surface of the lower mold, forming an injection cavity between the upper mold core and the lower mold core.
[0007] The core-pulling mechanism is provided on one side of the upper mold core and the lower mold core. The core-pulling mechanism includes a core, a core rotation assembly, a core movement assembly, a insert rod, an insert rod movement assembly, and a core positioning assembly.
[0008] The inner end of the tooth core is provided with a coiled tooth section; the tooth core is driven to rotate by the tooth core rotating assembly, and at the same time driven by the tooth core moving assembly so that the coiled tooth section can extend into or retract from the injection molding cavity;
[0009] The tooth core has a slanted through hole on its peripheral wall that connects to the inner end face of the tooth core, and the insert rod is driven by the insert rod moving assembly to extend and retract through the slanted through hole;
[0010] The tooth core is also provided with a positioning ratchet on its peripheral wall; the tooth core positioning assembly includes a positioning pawl and a positioning elastic element; the positioning pawl is oscillatingly disposed on one side of the tooth core and is pushed by the positioning elastic element to move against the positioning ratchet, so as to restrict the reverse rotation of the tooth core and not restrict the forward rotation of the tooth core.
[0011] Furthermore, the positioning ratchet and the oblique through hole are positioned opposite each other on both sides of the tooth core peripheral wall.
[0012] Furthermore, a limiting ring is fixedly fitted in the middle of the tooth core, and the positioning ratchet is disposed on the peripheral wall of the limiting ring.
[0013] Furthermore, the tooth core moving assembly includes a fixed seat, a slide seat, and a tooth core cylinder; the slide seat is slidably connected to the lower mold, and the fixed seat is spaced outside the slide seat and fixedly connected to the lower mold; the tooth core is rotatably inserted through the slide seat, and the tooth core positioning assembly is also installed inside the slide seat; the tooth core cylinder is installed on the fixed seat, and the piston rod of the tooth core cylinder is connected to the slide seat to drive the slide seat to move the tooth core back and forth.
[0014] Furthermore, the tooth core rotating assembly includes a rotating gear, a driven wheel, a driving wheel, and a rotary motor; the rotating gear is sleeved on the outer end of the tooth core, and the driven wheel is rotatably mounted in a slide; the rotary motor is mounted on a fixed base, and the driving wheel is mounted on the power end of the rotary motor; the driven wheel meshes between the rotating gear and the driving wheel; when the slide slides, the driven wheel can move axially along the driving wheel and always remain engaged.
[0015] Furthermore, the slide includes an inner seat, a middle seat, and an outer seat that are sequentially connected and locked together. The inner seat has an inner hole through which the tooth core passes, and the side wall of the inner hole is provided with a swing groove and a spring groove. The positioning pawl is swingably installed in the swing groove, and the upper end of the positioning pawl is hinged to the inner seat. The positioning elastic element is a spring installed in the spring groove, and the spring abuts against the middle of the positioning pawl. The middle seat has a central hole through which the tooth core passes and accommodates a rotating gear, and a side hole is provided on one side of the central hole for the driven wheel to be rotatably installed. The bottom of the side hole is open. The outer seat has an outer hole through which the tooth core passes, and the outer end of the outer seat is connected to the piston rod of the tooth core cylinder.
[0016] Furthermore, the outer side of the slide block has a slide block inclined surface, and the bottom of the upper mold is provided with an upper slide block inclined surface for positioning the slide block.
[0017] Furthermore, the insert moving assembly includes a slider, a fixing block, and an insert cylinder; the fixing block is connected and fixed to the lower mold, the slider slides inside the fixing block, and the insert cylinder is installed at the outer end of the fixing block; the inner end of the slider is connected to the insert, and the outer end of the slider is connected to the piston rod of the insert cylinder.
[0018] Furthermore, the slider has a slider ramp, and the bottom of the upper mold is provided with an upper slider ramp for positioning the slider.
[0019] After adopting the above technical solution, when the mold is closed, the threaded part of the core has threads and is located in the injection cavity to form the threaded opening of the product. The insert passes through the core and is also located in the injection cavity to form the inclined liquid outlet channel of the product. After the product is injected, when the mold is opened, the upper mold and upper mold core separate from the lower mold. The insert moving component drives the insert to exit the injection cavity and the inclined through hole of the core to avoid hindering the rotation of the core. Then the core is driven to rotate forward by the core rotating component and simultaneously moved outward by the core moving component. When the core rotates forward, it is not limited by the positioning pawl, so it can exit the injection cavity and simultaneously realize the core pulling and threading of the product. After the injected product is taken out, when the core is driven to rotate in reverse by the core rotating component, it will be stopped by the positioning pawl to reset the core to a predetermined angle, that is, to ensure that the inclined through hole of the core is reset to a position where the insert can be accurately inserted again. Then the mold can be closed to produce the next product.
[0020] This invention can solve the problem of difficult injection molding production of products with screw threads and oblique liquid outlet channels. Moreover, by setting a positioning pawl, the core can be reset after rotation, allowing the insert to be repeatedly and accurately inserted into the oblique through hole, which can ensure rapid mass production and guarantee production efficiency and quality. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of an injection-molded oil drum cap.
[0022] Figure 2 This is a diagram showing the mold opening state of an embodiment of this utility model;
[0023] Figure 3 This is a cross-sectional view (a) of an embodiment of the present utility model;
[0024] Figure 4 This is a cross-sectional view (II) of an embodiment of the present utility model;
[0025] Figure 5 This is a perspective view of the upper and lower mold cores and the coiled tooth core-pulling mechanism of this utility model embodiment;
[0026] Figure 6 This is an exploded view of the upper and lower mold cores and the coiled tooth core-pulling mechanism of this utility model embodiment;
[0027] Figure 7 This is a schematic diagram illustrating the fit between the inner seat, tooth core, rotating gear, driven wheel, and driving wheel in an embodiment of this utility model.
[0028] Labeling: Oil drum cap 10, screw thread 101, slanted liquid outlet channel 102, upper mold 1, upper slide inclined surface 11, lower mold 2, upper mold core 3, lower mold core 4, threaded core pulling mechanism 5, threaded core 51, threaded part 511, slanted through hole 512, positioning ratchet 513, limit ring 514, threaded core rotating assembly 52, rotating gear 521, driven wheel 522, driving wheel 523, rotary motor 524, threaded core moving assembly 53, fixed seat 531, slide 532, inner... 5321 base body, 5322 intermediate base body, 5323 outer base body, 5324 inner hole, 5325 swing groove, 5326 spring groove, 5327 middle hole, 5328 side hole, 5329 outer hole, 533 tooth core cylinder, 54 insert rod, 55 insert rod moving assembly, 551 slider, 552 fixed block, 553 insert rod cylinder, 56 tooth core positioning assembly, 561 positioning pawl, 562 positioning elastic element, 57 slide block inclined surface, 58 slider inclined surface, 6 injection molding cavity. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] like Figures 2 to 7 As shown, a coiled tooth core-pulling molding die of this embodiment includes an upper mold 1, a lower mold 2, an upper mold core 3, a lower mold core 4, and a coiled tooth core-pulling mechanism 5.
[0031] The upper mold 1 and lower mold 2 are detachably fitted together. The upper mold core 3 is located on the bottom surface of the upper mold 1, and the lower mold core 4 is located on the top surface of the lower mold 2. An injection cavity 6 is formed between the upper mold core 3 and the lower mold core 4. This injection cavity 6 is used for molding. Figure 1 The structure of the oil drum lid 10 shown.
[0032] The core-pulling mechanism 5 is located on one side of the upper mold core 3 and the lower mold core 4. The core-pulling mechanism 5 includes a core 51, a core rotation assembly 52, a core movement assembly 53, a insert 54, an insert movement assembly 55, and a core positioning assembly 56.
[0033] The inner end of the tooth core 51 is provided with a coiled tooth portion 511; the tooth core 51 is driven to rotate by the tooth core rotating assembly 52, and is simultaneously driven by the tooth core moving assembly 53 to allow the coiled tooth portion 511 to extend into or retract from the injection molding cavity 6; the peripheral wall of the tooth core 51 is provided with an oblique through hole 512 communicating with the inner end face of the tooth core 51, and the insert 54 is driven by the insert moving assembly 55 to extend and retract through the oblique through hole 512; the peripheral wall of the tooth core 51 is also provided with a positioning ratchet 513; the tooth core positioning assembly 56 includes a positioning pawl 561 and a positioning elastic element 562; the positioning pawl 561 is swayably disposed on one side of the tooth core 51, and is pushed by the positioning elastic element 562 to move and abut against the positioning ratchet 513, so as to restrict the reverse rotation of the tooth core 51 without restricting the forward rotation of the tooth core 51.
[0034] Therefore, the working principle of this coiled shaft forming mold can be summarized as follows:
[0035] See Figure 4 During mold closing, the threaded portion 511 of the core 51 has threads and is located within the injection cavity 6 to form the threaded opening of the product. The insert 54 passes through the core 51 and is simultaneously located within the injection cavity 6 to form the oblique liquid outlet channel of the product. After the product injection molding is completed, during mold opening, the upper mold 1 and upper mold core 3 separate from the lower mold 2. The insert moving assembly 55 drives the insert 54 to exit the injection cavity 6 and the oblique through hole 512 of the core 51 to avoid obstructing the rotation of the core 51. Subsequently, the core 51 is driven to rotate forward by the core rotating assembly 52 and simultaneously... Driven by the core moving assembly 53, the core 51 moves outward. When rotating forward, it is not limited by the positioning pawl 561, so it can exit the injection cavity 6 and simultaneously achieve core pulling and core tightening of the product. After the injection-molded product is removed, when the core 51 is driven to rotate in reverse by the core rotating assembly 52, it will be limited by the positioning pawl 561 to reset the core 51 to the predetermined angle, that is, to ensure that the oblique through hole 512 of the core 51 is reset to the position where the insert 54 can be accurately inserted again. Then the mold can be closed to carry out the injection molding production of the next product.
[0036] This embodiment can solve the problem of difficult injection molding production of products with screw holes and oblique liquid outlet channels. Moreover, by setting the positioning pawl 561, the tooth core 51 can be reset after rotation, so that the insert 54 can be repeatedly and accurately inserted into the oblique through hole 512, which can ensure rapid mass production and guarantee production efficiency and quality.
[0037] In this embodiment, the positioning ratchet 513 and the oblique through hole 512 are arranged opposite to each other on both sides of the peripheral wall of the tooth core 51. This allows the tooth core positioning assembly 56 to be separated from the insert 54, facilitating production.
[0038] In this embodiment, a limiting ring 514 is fixedly fitted in the middle of the tooth core 51, and the positioning ratchet 513 can be set on the peripheral wall of the limiting ring 514 to facilitate the assembly of the tooth core 51.
[0039] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the tooth core moving assembly 53 includes a fixed seat 531, a slide seat 532, and a tooth core cylinder 533; the slide seat 532 is slidably connected to the lower mold 2, and the fixed seat 531 is spaced apart from the outside of the slide seat 532 and connected and fixed to the lower mold 2; the tooth core 51 is rotatably inserted through the slide seat 532, and the tooth core positioning assembly 56 is also installed in the slide seat 532; the tooth core cylinder 533 is installed on the fixed seat 531, and the piston rod of the tooth core cylinder 533 is connected to the slide seat 532 for driving the slide seat 532 to move the tooth core 51 back and forth.
[0040] In this embodiment, the tooth core rotation assembly 52 includes a rotating gear 521, a driven wheel 522, a driving wheel 523, and a rotary motor 524; the rotating gear 521 is sleeved on the outer end of the tooth core 51, and the driven wheel 522 is rotatably mounted in the slide 532; the rotary motor 524 is mounted on the fixed base 531, and the driving wheel 523 is mounted on the power end of the rotary motor 524; see reference. Figure 7 The driven wheel 522 meshes between the rotating gear 521 and the driving wheel 523; when the slide block 532 slides, the driven wheel 522 can move axially along the driving wheel 523 and always remain engaged. Specifically, the axial length of the driving wheel 523 can be increased to facilitate the engagement of the driven wheel 522.
[0041] Therefore, when the tooth core cylinder 533 drives the slide block 532 to move, it can also drive the driven wheel 522 to move, ensuring that the tooth core 51 can always keep rotating.
[0042] like Figure 6 As shown, the slide 532 may include an inner seat 5321, a middle seat 5322, and an outer seat 5323 that are sequentially connected and locked together. The inner seat 5321 has an inner hole 5324 through which the tooth core 51 passes. The side wall of the inner hole 5324 is provided with a swing groove 5325 and a spring groove 5326. The positioning pawl 561 is swingably installed in the swing groove 5325, and the upper end of the positioning pawl 561 is hinged to the inner seat 5321. The positioning elastic element 562 is a spring installed in the spring groove 5326, and the spring abuts against the middle of the positioning pawl 561. It is used to elastically abut against the positioning pawl 561 so that when the tooth core 51 is reversed, the lower end of the positioning pawl 561 can be embedded in the positioning ratchet 513.
[0043] The intermediate seat 5322 has a central hole 5327 through which the tooth core 51 passes and accommodates the rotating gear 521. A side hole 5328 is provided on one side of the central hole 5327 for the driven wheel 522 to be rotatably mounted. The bottom of the side hole 5328 is open. The outer seat 5323 has an outer hole 5329 through which the tooth core 51 passes. The outer end of the outer seat 5323 is connected to the piston rod of the tooth core cylinder 533. This facilitates the assembly and installation of the mold.
[0044] In this embodiment, the insert moving assembly 55 includes a slider 551, a fixing block 552, and an insert cylinder 553. The fixing block 552 is fixedly connected to the lower mold 2, the slider 551 slides along the inner side of the fixing block 552, and the insert cylinder 553 is mounted on the outer end of the fixing block 552. The inner end of the slider 551 is connected to the insert 54, and the outer end of the slider 551 is connected to the piston rod of the insert cylinder 553. The insert cylinder 553 can drive the slider 551 to reciprocate along the fixing block 552 on the lower mold 2, thereby driving the insert 54 to reciprocate.
[0045] In this embodiment, the slide block 532 has a slide block inclined surface 57 on its outer side, and the upper mold 1 has an upper slide block inclined surface 11 at its bottom for positioning the slide block 532. The slider 551 has a slider inclined surface 58, and the upper mold 1 has an upper slider inclined surface (not shown) at its bottom for positioning the slider 551.
[0046] Therefore, after the mold is closed, the slide block 532 and the slider 551 can be kept in the preset position, thus ensuring the quality of product injection molding.
[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.
[0048] In the description of the embodiments of this application, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use, or the orientations or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.
Claims
1. A core-pulling molding die for coiled teeth, characterized in that: Includes upper mold, lower mold, upper mold core, lower mold core, and coiled core pulling mechanism; The upper mold and the lower mold are detachably fitted together. The upper mold core is located on the bottom surface of the upper mold, and the lower mold core is located on the top surface of the lower mold, forming an injection cavity between the upper mold core and the lower mold core. The core-pulling mechanism is provided on one side of the upper mold core and the lower mold core. The core-pulling mechanism includes a core, a core rotation assembly, a core movement assembly, a insert rod, an insert rod movement assembly, and a core positioning assembly. The inner end of the tooth core is provided with a coiled tooth section; the tooth core is driven to rotate by the tooth core rotating assembly, and at the same time driven by the tooth core moving assembly so that the coiled tooth section can extend into or retract from the injection molding cavity; The tooth core has a slanted through hole on its peripheral wall that connects to the inner end face of the tooth core, and the insert rod is driven by the insert rod moving assembly to extend and retract through the slanted through hole; The tooth core is also provided with a positioning ratchet on its peripheral wall; the tooth core positioning assembly includes a positioning pawl and a positioning elastic element; the positioning pawl is oscillatingly disposed on one side of the tooth core and is pushed by the positioning elastic element to move against the positioning ratchet, so as to restrict the reverse rotation of the tooth core and not restrict the forward rotation of the tooth core.
2. A core- drawing swage as claimed in claim 1, wherein: The positioning ratchet and the oblique through hole are positioned opposite each other on both sides of the tooth core peripheral wall.
3. A core- drawing swage as defined in claim 1, wherein: A limiting ring is fixedly fitted in the middle of the tooth core, and the positioning ratchet is disposed on the peripheral wall of the limiting ring.
4. The coiled tooth core-pulling forming mold according to claim 1, characterized in that: The tooth core moving assembly includes a fixed seat, a slide seat, and a tooth core cylinder; the slide seat is slidably connected to the lower mold, and the fixed seat is spaced outside the slide seat and fixedly connected to the lower mold; the tooth core is rotatably inserted through the slide seat, and the tooth core positioning assembly is also installed inside the slide seat; the tooth core cylinder is installed on the fixed seat, and the piston rod of the tooth core cylinder is connected to the slide seat to drive the slide seat to move the tooth core back and forth.
5. A core-pulling forming mold according to claim 4, characterized in that: The tooth core rotating assembly includes a rotating gear, a driven wheel, a driving wheel, and a rotary motor; the rotating gear is sleeved on the outer end of the tooth core, and the driven wheel is rotatably mounted in a slide; the rotary motor is mounted on a fixed base, and the driving wheel is mounted on the power end of the rotary motor; the driven wheel meshes between the rotating gear and the driving wheel; when the slide slides, the driven wheel can move axially along the driving wheel and always remain engaged.
6. The coiled tooth core-pulling forming mold according to claim 5, characterized in that: The slide includes an inner seat, a middle seat, and an outer seat, which are sequentially connected and locked together. The inner seat has an inner hole through which the tooth core passes, and the side wall of the inner hole is provided with a swing groove and a spring groove. The positioning pawl is swayably installed in the swing groove, and the upper end of the positioning pawl is hinged to the inner seat. The positioning elastic element is a spring installed in the spring groove, and the spring abuts against the middle of the positioning pawl. The middle seat has a central hole through which the tooth core passes and accommodates a rotating gear, and a side hole is provided on one side of the central hole for the driven wheel to be rotatably installed. The bottom of the side hole is open. The outer seat has an outer hole through which the tooth core passes, and the outer end of the outer seat is connected to the piston rod of the tooth core cylinder.
7. The coiled tooth core-pulling forming mold according to claim 4, characterized in that: The outer side of the slide block has a slide block inclined surface, and the bottom of the upper mold is provided with an upper slide block inclined surface for positioning the slide block.
8. The coiled core-pulling forming mold according to claim 4, characterized in that: The insert moving assembly includes a slider, a fixed block, and an insert cylinder; the fixed block is connected and fixed to the lower mold, the slider slides inside the fixed block, and the insert cylinder is installed at the outer end of the fixed block; the inner end of the slider is connected to the insert, and the outer end of the slider is connected to the piston rod of the insert cylinder.
9. A core-pulling forming mold according to claim 8, characterized in that: The slider has a slider slope, and the bottom of the upper mold is provided with an upper slider slope for positioning the slider.