Rotary mold forming mechanism, injection mold, and injection molding apparatus

Abstract

This utility model relates to the field of automotive parts technology, and provides a rotary demolding molding mechanism, injection mold, and injection molding equipment. The molding mechanism includes a first core-pulling component, a second core-pulling component, and a drive assembly. The first core-pulling component is configured to be rotatable; the second core-pulling component is configured to be rotatable; the drive assembly includes a transmission unit and a drive unit, the transmission unit is configured to be movable, and both the first and second core-pulling components are drively connected to the transmission unit, and the drive unit is drively connected to the transmission unit; wherein, the drive unit drives the transmission unit to move, and the first and second core-pulling components rotate synchronously, which can prevent interference between their rotation paths in space, and the synergy of synchronous movement reduces the rotation stroke requirement of a single core-pulling component. When the first and second core-pulling components rotate synchronously in opposite directions, after the base is formed, it is beneficial to ensure that the specified rotation angle is completed and smoothly disengage from the undercut bending area of ​​the base, thereby improving demolding reliability and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a rotary ejection molding mechanism, injection mold, and injection molding equipment. Background Technology

[0002] Automotive parts, such as fuel filler cap bases, require rotating core-pulling structures on the molding die for the undercut portion used to connect to the faceplate. However, due to the miniaturization of the base's structure and the precision requirements of assembly, the internal and external rotating core-pulling structures interfere with each other in the spatial layout of the molding die. Their movement trajectories, such as the direction of the rotation axis and the core-pulling stroke path, interfere in three dimensions, preventing the core-pulling structure from independently completing the required rotation angle. This ultimately affects demolding reliability and production efficiency. Utility Model Content

[0003] This utility model provides a rotating demolding molding mechanism to solve the problem in related technologies where the internal and external rotating core-pulling structures cannot independently complete the specified rotation angle due to spatial layout interference on the molding die, thus affecting demolding reliability and production efficiency.

[0004] This utility model provides a molding mechanism for rotary demolding, comprising:

[0005] The first core-pulling component is configured to be rotatable, and the first core-pulling component has a first arc portion;

[0006] The second core-pulling component is configured to be rotatable. The second core-pulling component has a second arc portion, and there is a gap between the first arc portion and the second arc portion to form a cavity for molding the undercut bending area of ​​the base.

[0007] A drive assembly includes a transmission unit and a drive unit, wherein the transmission unit is configured to be movable, the first core-pulling member and the second core-pulling member are both drive-connected to the transmission unit, and the drive unit is drive-connected to the transmission unit.

[0008] The drive unit drives the transmission unit to move, and the first core-pulling component and the second core-pulling component rotate synchronously.

[0009] According to the present invention, a rotary demolding molding mechanism is provided, wherein the transmission unit is configured to be movable, and the drive unit is connected to the transmission unit in a transmission manner.

[0010] According to the present invention, a rotary ejection molding mechanism is provided, wherein the transmission unit includes:

[0011] A movable component, configured to be movable, the movable component being drive-connected to the drive unit, the movable component being provided with a drive ramp;

[0012] A first transmission component, one end of which is rotatably connected to the moving component, and the other end of which is rotatably connected to the first core-pulling component;

[0013] The second transmission component has one end abutting against and slidably engaging with the transmission inclined surface, and the other end being movably connected to the second core-pulling component.

[0014] According to the present invention, a rotating ejection molding mechanism is provided, wherein the first core-pulling component is provided with a first rotating recess, and the moving component is provided with a second rotating recess;

[0015] One end of the first transmission member is located in the first rotational recess, and the other end of the first transmission member is located in the second rotational recess.

[0016] According to the present invention, a rotary demolding molding mechanism is provided, wherein the moving part is provided with a limiting groove, and the transmission inclined surface is provided on the bottom wall of the limiting groove.

[0017] According to the present invention, a rotary demolding molding mechanism is provided, wherein the second core-pulling member is provided with a transmission channel, and the second transmission member is provided with a transmission part, the transmission part being slidably inserted into the transmission channel.

[0018] According to the present invention, a rotary demolding molding mechanism is provided, wherein the rotary demolding molding mechanism further includes a mounting shaft, and both the first core-pulling component and the second core-pulling component are rotatably sleeved on the mounting shaft.

[0019] This utility model also provides an injection mold, comprising:

[0020] A first template, wherein the first template is provided with a first mold core, and the first mold core has a first cavity;

[0021] The second template is movable relative to the first template and the second template. The second template is provided with a second mold core. The second mold core has a second cavity. The first cavity and the second cavity form a mold cavity. The mold cavity is used to form the base.

[0022] In the aforementioned rotating molding mechanism, the driving component is located on the first mold plate, and both the first core-pulling component and the second core-pulling component are rotatably connected to the first mold core, with at least a portion of both the first core-pulling component and the second core-pulling component located within the first cavity.

[0023] According to the present invention, an injection mold is provided in which the inner wall of the first cavity is provided with a first guide surface and a second guide surface. The first guide surface is used to guide the first core-pulling component to rotate, and the second guide surface is used to guide the second core-pulling component to rotate.

[0024] This utility model also provides an injection molding device, including the above-mentioned injection mold.

[0025] The rotary demolding molding mechanism provided by this utility model drives the first core-pulling component and the second core-pulling component to rotate synchronously relative to each other through the drive unit to the transmission unit. This can prevent the two components from interfering with each other in the space, and the synergy of synchronous movement reduces the rotation stroke requirement of a single core-pulling component. When the first core-pulling component and the second core-pulling component rotate synchronously in opposite directions, it helps to ensure that the specified rotation angle is completed and smoothly disengage from the undercut bending area of ​​the base after the base is formed, thereby improving demolding reliability and production efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the injection mold provided by this utility model.

[0028] Figure 2 This is a cross-sectional schematic diagram of the injection mold provided by this utility model.

[0029] Figure 3 This is a schematic diagram of the molding mechanism provided by this utility model.

[0030] Figure 4 This is an exploded view of the molding mechanism provided by this utility model.

[0031] Figure label:

[0032] 100. First core-pulling component; 110. First arc portion; 120. First rotating recess; 200. Second core-pulling component; 210. Second arc portion; 220. Transmission channel;

[0033] 300. Transmission unit; 310. Moving part; 311. Second rotation recess; 312. Limiting groove; 3121. Transmission inclined surface; 320. First transmission component; 330. Second transmission component; 331. Transmission part;

[0034] 400, Drive unit; 500, Mounting shaft; 600, First template; 610, First mold core; 611, First cavity; 700, Second template; 710, Second mold core; 6111, First guide surface; 6112, Second guide surface; A, Base; A1, Inverted part. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] The following is combined Figures 1-4 This invention describes the rotary ejection molding mechanism, injection mold, and injection molding equipment of the present invention.

[0037] Understandably, referring to Figures 2 to 4 In some examples of this utility model, the rotary demolding molding mechanism includes a first core-pulling member 100, a second core-pulling member 200, and a driving assembly. The first core-pulling member 100 is configured to be rotatable and has a first arc portion 110. The second core-pulling member 200 is configured to be rotatable and has a second arc portion 210. There is a gap between the first arc portion 110 and the second arc portion 210 to form a cavity. The cavity is used to form the bent area of ​​the undercut portion A1 of the base A. The driving assembly includes a transmission unit 300 and a driving unit 400. The transmission unit 300 is configured to be movable. The first core-pulling member 100 and the second core-pulling member 200 are both driveably connected to the transmission unit 300. The driving unit 400 is driveably connected to the transmission unit 300.

[0038] Among them, the drive unit 400 drives the transmission unit 300 to move, and the first core-pulling component 100 and the second core-pulling component 200 rotate synchronously.

[0039] The rotary demolding molding mechanism provided by this utility model is driven by the drive unit 400 to the transmission unit 300, which drives the first core-pulling component 100 and the second core-pulling component 200 to rotate synchronously relative to each other. This can prevent the two from interfering with each other in terms of rotation path in space, and the synergy of synchronous movement reduces the rotation stroke requirement of a single core-pulling component. When the first core-pulling component 100 and the second core-pulling component 200 rotate synchronously in opposite directions, it is beneficial to ensure that the specified rotation angle is completed and the core-pulling component smoothly disengages from the undercut part A1 bending area of ​​the base A after the base A is formed, thereby improving demolding reliability and production efficiency.

[0040] Understandably, referring to Figures 2 to 4In some examples of this utility model, the transmission unit 300 is configured to be movable, and the drive unit 400 is connected to the transmission unit 300 in a transmission manner.

[0041] The drive unit 400 outputs power to the transmission unit 300 to receive the power and make movable movements (such as sliding and swinging), converting the power into the composite movement of the core-pulling component (such as rotation and translation), thereby synchronously driving the first core-pulling component 100 and the second core-pulling component 200 to rotate in opposite directions, accurately matching the complex contour of the undercut part A1.

[0042] Specifically, refer to Figures 2 to 4 In this embodiment, the driving unit 400 drives the transmission unit 300 to perform linear motion, thereby driving the first core-pulling component 100 and the second core-pulling component 200 to move.

[0043] Reference Figures 2 to 4 In some examples of this utility model, the transmission unit 300 includes a movable member 310, a first transmission member 320, and a second transmission member 330. The movable member 310 is configured to be movable and is connected to the drive unit 400 in a transmission manner. The movable member 310 is provided with a transmission inclined surface 3121. One end of the first transmission member 320 is rotatably connected to the movable member 310, and the other end of the first transmission member 320 is rotatably connected to the first core-pulling member 100. One end of the second transmission member 330 abuts against the transmission inclined surface 3121 and is slidably engaged. The other end of the second transmission member 330 is movably connected to the second core-pulling member 200.

[0044] When the drive unit 400 drives the moving part 310 to move linearly, the transmission inclined surface 3121 on the moving part 310 pushes the second transmission part 330 to slide. At the same time, the movement of the moving part 310 itself will also drive the first transmission part 320 to rotate, thereby driving the first core-pulling part 100 to rotate. The sliding of the second transmission part 330 will push the second core-pulling part 200 to rotate in the opposite direction, thus realizing the synchronous opposite rotation of the two core-pulling parts. This ingenious dual-path transmission design, by controlling the coordinated movement of the two core-pulling parts simultaneously through a single drive source, not only greatly simplifies the mold structure, but also ensures a high degree of synchronization of the demolding action, effectively solving the demolding problem of complex undercut structures, while improving demolding efficiency and mold service life.

[0045] Understandably, referring to Figures 2 to 4 In some examples of this utility model, the first core-pulling member 100 is provided with a first rotating recess 120, and the moving member 310 is provided with a second rotating recess 311.

[0046] One end of the first transmission member 320 is located in the first rotation recess 120, and the other end of the first transmission member 320 is located in the second rotation recess 311.

[0047] When the drive unit 400 drives the moving member 310 to move, the second rotating recess 311 on the moving member 310 forms a rotating pair with one end of the first transmission member 320. At the same time, the other end of the first transmission member 320 rotates within the first rotating recess 120 of the first core-pulling member 100, thereby converting the linear motion of the moving member 310 into the rotational motion of the first core-pulling member 100. This achieves efficient synchronous demolding of the bent area of ​​the undercut portion A1 of the base A, significantly improving demolding efficiency and mold reliability, while simplifying the transmission mechanism design and reducing mold manufacturing and maintenance costs.

[0048] Understandably, referring to Figures 2 to 4 In some examples of this utility model, the moving part 310 is provided with a limiting groove 312, and the transmission inclined surface 3121 is provided on the bottom wall of the limiting groove 312.

[0049] The moving part 310 is equipped with a limiting groove 312 (arranged at an inclination) and a transmission inclined surface 3121 on its bottom wall. The linear movement of the moving part 310 is guided by the inclined groove, which can accurately guide the sliding trajectory of the second transmission part 330 and avoid lateral deviation and jamming. The limiting groove 312 can also limit and improve the stability of the movement. At the same time, this design integrates multi-directional movement into a single moving part 310, which simplifies the complexity of the mechanism, saves mold space, and effectively improves the transmission efficiency and demolding reliability.

[0050] Understandably, referring to Figures 2 to 4 In some examples of this utility model, the second core-pulling member 200 is provided with a transmission channel 220, and the second transmission member 330 is provided with a transmission part 331, which is slidably inserted into the transmission channel 220.

[0051] When the drive unit 400 moves the moving part 310, the second transmission part 330 slides along the transmission ramp 3121 within the transmission channel 220, guiding the second core-pulling part 200 to complete the rotational demolding action. Simultaneously, the moving part 310 drives the first core-pulling part 100 to rotate synchronously in the opposite direction via a rotating recess. This ingenious sliding fit design achieves two major technological breakthroughs: firstly, the precise guidance of the transmission channel 220 and the transmission part 331 ensures the stability and accuracy of the movement trajectory of the second core-pulling part 200, effectively avoiding the jamming problem common in traditional mechanisms; secondly, it efficiently converts the longitudinal movement of the second transmission part 330 into the rotational movement of the core-pulling part, achieving precise conversion of motion forms and enabling the two core-pulling parts to rotate strictly synchronously, significantly improving demolding efficiency. This structure not only simplifies the transmission system and reduces the number of parts but also significantly improves motion reliability, providing an innovative solution for the efficient demolding of complex undercut structures.

[0052] Understandably, referring to Figures 2 to 4In some examples of this utility model, the rotating demolding molding mechanism further includes a mounting shaft 500, and both the first core-pulling component 100 and the second core-pulling component 200 are rotatably sleeved on the mounting shaft 500.

[0053] By using a coaxial mounting shaft 500 as a common rotation fulcrum, the first core-pulling component 100 and the second core-pulling component 200 can rotate synchronously around the same axis for demolding. The drive unit 400, through the linkage mechanism of the moving component 310, the transmission inclined surface 3121, and the transmission channel 220, precisely controls the two core-pulling components to maintain strict synchronous rotation. The coaxial design not only ensures the concentricity and motion consistency of the core-pulling components during rotation, effectively avoiding jamming or wear caused by axis misalignment, but also significantly simplifies the mechanism structure and improves motion accuracy and reliability. This solution achieves efficient synchronous demolding of complex undercut structures through a coaxial layout, significantly improving the stability and service life of the mold, while reducing assembly difficulty and maintenance costs.

[0054] Of course, in some other examples, the first core-pulling component 100 and the second core-pulling component 200 can also achieve synchronous movement by being mounted on different shafts, as long as the rotation centers of the first core-pulling component 100 and the second core-pulling component 200 coincide. Of course, in some other examples, the rotation centers of the first core-pulling component 100 and the second core-pulling component 200 do not coincide, as long as synchronous movement is guaranteed.

[0055] It should be noted that the drive unit 400 (such as a cylinder, motor, or hydraulic cylinder) outputs power to drive the transmission unit 300 to move. Specifically, in this embodiment, the drive unit 400 is an external hydraulic cylinder.

[0056] Of course, in other examples, the aforementioned transmission unit 300 can also be a gear rack, crank slider or linkage mechanism, etc., which receives power and converts the input motion in a single direction into a compound motion such as rotation + translation.

[0057] Understandably, referring to Figure 1 and Figure 2 In some examples of this utility model, the injection mold includes a first template 600, a second template 700, and the aforementioned rotating ejection molding mechanism. The first template 600 is provided with a first mold core 610, which has a first cavity 611. The second template 700 is movable relative to the first template 600 and the second template 700 is provided with a second mold core 710, which has a second cavity. The first cavity 611 and the second cavity form a mold cavity, which is used to form a base A. A drive assembly is provided on the first template 600. The first core-pulling member 100 and the second core-pulling member 200 are rotatably connected to the first mold core 610, and both the first core-pulling member 100 and the second core-pulling member 200 are at least partially located within the first cavity 611.

[0058] Specifically, refer to Figure 2 In this embodiment, the mounting shaft 500 is connected to the first mold core 610, the movable component 310 is movably disposed on the first template 600, and the driving unit 400 is mounted on the first template 600.

[0059] Because the injection mold has the above-mentioned molding mechanism, it also has the effects of the above-mentioned molding mechanism.

[0060] Specifically, in some examples of this utility model, the first mold core 610 is provided with a guide protrusion along its height direction, and the second transmission member 330 is provided with a guide groove that is slidably connected to the guide protrusion.

[0061] The sliding engagement between the guide protrusion and the guide groove provides precise guiding constraints for the relative movement of the first mold core 610 and the second transmission component 330 in the height direction: after the guide protrusion is embedded in the guide groove, it strictly limits the two to sliding only in a straight line in the height direction, avoiding lateral offset or angular deviation, and ensuring the consistency of the movement trajectory.

[0062] Of course, in some examples, the aforementioned guide protrusion can also be provided on the second transmission mechanism, and the guide groove can also be provided on the first mold core 610.

[0063] Reference Figure 2 In some examples of this utility model, the inner sidewall of the first cavity 611 is provided with a first guide surface 6111 and a second guide surface 6112. The first guide surface 6111 is used to guide the first core-pulling member 100 to rotate, and the second guide surface 6112 is used to guide the second core-pulling member 200 to rotate.

[0064] When the first core-pulling component 100 and the second core-pulling component 200 rotate and demold with the transmission unit 300, their motion trajectories are directly guided by the first guide surface 6111 and the second guide surface 6112 on the inner sidewall of the first cavity 611. During the rotation of the first core-pulling component 100, its edge contacts the first guide surface 6111, and the rotation angle and path are limited by the constraint of the guide surface. Similarly, the second core-pulling component 200 cooperates with the second guide surface 6112 to ensure the accuracy of synchronous reverse rotation. The contact constraint between the guide surface and the core-pulling component replaces the traditional additional guide component, simplifying the mechanism structure. It ensures the coaxiality and trajectory accuracy of the core-pulling component rotation and avoids jamming or undercutting due to offset. At the same time, the contact stress distribution of the guide surface is uniform, reducing motion wear and improving the smoothness and reliability of the demolding process.

[0065] Of course, in other examples, an independent guide block (or guide post) adapted to the first core-pulling component 100 and the second core-pulling component 200 can be added in the first cavity 611. The inner side of the guide block is machined with an arc-shaped guide groove that matches the rotation trajectory of the core-pulling component. The outer periphery of the first core-pulling component 100 and the second core-pulling component 200 are respectively provided with guide bosses. When rotating, the guide bosses slide along the arc-shaped guide groove, which forcibly limits the rotation angle and path.

[0066] It should be noted that in this embodiment, the first core-pulling component 100 and the second core-pulling component 200 overlap in the vertical direction of the first mold core 610, so as to make the structure more compact and reduce the overall volume of the mold core.

[0067] It is understood that in some examples of this utility model, the injection molding equipment includes the aforementioned injection mold. Because the injection molding equipment has an injection mold, and the injection mold has the aforementioned molding mechanism, it also has the effects of the aforementioned molding mechanism.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A molding mechanism for rotary demolding, characterized in that, include: The first core-pulling component is configured to be rotatable, and the first core-pulling component has a first arc portion; The second core-pulling component is configured to be rotatable. The second core-pulling component has a second arc portion, and there is a gap between the first arc portion and the second arc portion to form a cavity for molding the undercut bending area of ​​the base. A drive assembly includes a transmission unit and a drive unit, wherein the transmission unit is configured to be movable, the first core-pulling member and the second core-pulling member are both drive-connected to the transmission unit, and the drive unit is drive-connected to the transmission unit. The drive unit drives the transmission unit to move, and the first core-pulling component and the second core-pulling component rotate synchronously.

2. The rotary demolding molding mechanism according to claim 1, characterized in that, The transmission unit is configured to be movable, and the drive unit is connected to the transmission unit in a transmission manner.

3. The rotary demolding molding mechanism according to claim 2, characterized in that, The transmission unit includes: A movable component, configured to be movable, the movable component being drive-connected to the drive unit, the movable component being provided with a drive ramp; A first transmission component, one end of which is rotatably connected to the moving component, and the other end of which is rotatably connected to the first core-pulling component; The second transmission component has one end abutting against and slidably engaging with the transmission inclined surface, and the other end being movably connected to the second core-pulling component.

4. The rotary demolding molding mechanism according to claim 3, characterized in that, The first core-pulling component has a first rotating recess, and the moving component has a second rotating recess; One end of the first transmission member is located in the first rotation recess, and the other end of the first transmission member is located in the second rotation recess.

5. The rotary demolding molding mechanism according to claim 3, characterized in that, The moving part is provided with a limiting groove, and the transmission inclined surface is provided on the bottom wall of the limiting groove.

6. The rotary demolding molding mechanism according to any one of claims 3 to 5, characterized in that, The second core-pulling component is provided with a transmission channel, and the second transmission component is provided with a transmission part, which is slidably inserted into the transmission channel.

7. The rotary demolding molding mechanism according to claim 1, characterized in that, The rotary demolding molding mechanism further includes a mounting shaft, and both the first core-pulling component and the second core-pulling component are rotatably sleeved on the mounting shaft.

8. An injection mold, characterized in that, include: A first template, wherein the first template is provided with a first mold core, and the first mold core has a first cavity; The second template is movable relative to the first template and the second template. The second template is provided with a second mold core. The second mold core has a second cavity. The first cavity and the second cavity form a mold cavity. The mold cavity is used to form the base. The rotary molding mechanism according to any one of claims 1 to 7, wherein the driving component is disposed on the first template, the first core-pulling member and the second core-pulling member are rotatably connected to the first mold core, and both the first core-pulling member and the second core-pulling member are at least partially located within the first cavity.

9. The injection mold according to claim 8, characterized in that, The inner wall of the first cavity is provided with a first guide surface and a second guide surface. The first guide surface is used to guide the first core-pulling component to rotate, and the second guide surface is used to guide the second core-pulling component to rotate.

10. An injection molding machine, characterized in that, Including the injection mold as described in any one of claims 8 to 9.

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