Large-stroke back-off demolding mechanism
By combining the angled ejector assembly, the straight ejector assembly, and the side ejector assembly, the problem of difficult demolding of complex plastic parts with large undercuts is solved, achieving an efficient and non-destructive demolding process, and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202422912666.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Traditional demolding methods are difficult to effectively handle the large undercut structure of complex plastic parts, leading to demolding difficulties or damage to the plastic parts and molds.
By employing the synergistic action of the angled ejector assembly, the straight ejector assembly, and the lateral ejector assembly, the inverted fastener is smoothly ejected through the separation of the angled ejector assembly and the straight ejector assembly and the cooperation of the lateral ejector assembly, thus avoiding adhesion and jamming.
It improves the success rate of demolding complex plastic parts, protects molds and plastic parts from damage, and improves production efficiency and product quality.
Smart Images
Figure CN223532919U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of molds, and in particular to a long-stroke undercut demolding mechanism. Background Technology
[0002] In the process of producing plastic parts, especially those with complex structures, the demolding process often faces certain challenges. Specifically, when the plastic part has a sidewall structure and through holes are provided in the sidewall, the plastic part often sticks to the mold forming surface during demolding. This sticking phenomenon can adversely affect the demolding process, leading to demolding difficulties and even potentially damaging the plastic part.
[0003] To address these demolding challenges, the industry has proposed and applied various demolding technologies. Traditional demolding methods include sliders, angled ejectors, rocker arms, and forced demolding, which can effectively facilitate the smooth demolding of plastic parts under different conditions. Sliders and angled ejectors use movable parts in the mold to help the plastic part detach from the mold with mechanical force; rocker arms use a swing mechanism to drive some movement in the mold, changing the shape of the mold to achieve demolding; forced demolding devices apply pressure with powerful mechanical devices to help overcome the adhesion or sticking forces between the plastic part and the mold.
[0004] However, when the undercut of the plastic part is large, these traditional demolding methods often fail to meet the requirements, especially in some complex product structures. For example, some complex plastic parts may have deep hook-like structures or other special geometries, making it impossible to effectively apply traditional demolding methods such as sliders, angled ejectors, and rocker arms in mold design. In addition, although strong demolding devices can provide greater demolding force, when the undercut is too large or the shape of the plastic part is too complex, strong demolding may not produce sufficient demolding effect, and may even damage the plastic part or cause damage to the mold.
[0005] Therefore, there is an urgent need to develop a new demolding mechanism to meet the demolding requirements of complex plastic parts, ensuring that demolding can be effective during the production process while protecting the mold and plastic parts from damage. Utility Model Content
[0006] To ensure smooth demolding of complex plastic parts and to protect the mold and plastic parts from damage, this application provides a long-stroke inverted demolding mechanism.
[0007] The long-stroke undercut demolding mechanism provided in this application adopts the following technical solution:
[0008] A long-stroke undercut demolding mechanism for demolding products includes an angled ejector assembly, a straight ejector assembly, and a side ejector assembly. The angled ejector assembly and the straight ejector assembly abut against and are in contact with the product. The undercut of the product is located inside the straight ejector assembly and is in contact with the side ejector assembly. The angled ejector assembly is used to disengage from the product and the straight ejector assembly during ejection, and the side ejector assembly is used to eject the undercut from the straight ejector assembly.
[0009] By adopting the above technical solution, during demolding, the inclined ejector assembly and the straight ejector assembly are moved together, and the inclined ejector assembly, the straight ejector assembly, and the product are ejected together. During the ejection process, the inclined ejector assembly will separate from the straight ejector assembly and the product, leaving space for the undercut to be ejected. At this time, the ejection continues, and the side ejector assembly can eject the undercut from the straight ejector assembly, completing the first ejection operation. The ejection continues, and the product is completely ejected under the action of the inclined ejector assembly, completing the second ejection operation.
[0010] By utilizing the synergistic effect of the angled ejector assembly, the straight ejector assembly, and the side ejector assembly, the demolding requirements of large undercuts can be effectively met, making the demolding process smoother and more efficient. The angled ejector assembly provides demolding space for the undercut by separating from the product and mold surface, which can prevent the product from sticking to the mold surface, avoid jamming, and improve the demolding success rate. The side ejector assembly can effectively eject the undercut from the mold, avoiding jamming and damage caused by the undercut, reducing breakage or defective products caused by the undercut, and improving product quality.
[0011] In one specific implementation, the lateral ejection assembly includes a lever and a slider. The lever is located on the side of the straight ejection assembly away from the angled ejection assembly. The slider is embedded in the straight ejection assembly. One end of the slider contacts the buckle, and the other end abuts against the lever. The lever is used to drive the slider to move to eject the buckle.
[0012] By adopting the above technical solution, as the straight ejector component is ejected, the relative position between the slider and the pusher block changes. The slider is pushed by the pusher block and begins to move. The slider moves along the inside of the straight ejector component, ejecting the undercut from the straight ejector component and completing the lateral ejection of the undercut. Through the cooperation of the pusher block and the slider, the separation of the undercut from the product is completed in the early stage of the demolding process, which will not affect the subsequent ejection steps, avoid possible jamming or stagnation, and thus improve the overall demolding efficiency.
[0013] In one specific implementation, the lever is provided with a guide groove, and the end of the slider away from the inverted buckle is located in the guide groove and moves within the guide groove.
[0014] By adopting the above technical solution, when the direct-acting component moves, it drives the slider embedded on it to move together. At this time, the slider moves along the guide groove. The guide groove guides the movement of the slider, avoiding possible deviation or wobbling of the slider during the movement, ensuring that the slider always moves along the correct path, so that the contact between the slider and the undercut remains accurate, ensuring the accuracy of the subsequent undercut ejection process.
[0015] In one specific implementation, the guide groove has a driving inclined surface on its groove wall, and the slider has a mating inclined surface, the driving inclined surface being used to press the mating inclined surface.
[0016] By adopting the above technical solution, the driving inclined plane applies a squeezing force to the slider through the tilt angle. This force helps to provide a stronger driving effect during the movement of the slider, enabling the slider to effectively push the undercut out. The slider can complete the undercut out in a shorter time. Due to the improved efficiency of the slider movement, the ejection process is smoother and faster, thereby improving the overall production efficiency and automation level.
[0017] In one specific implementation, a spring is also included. The slider has a groove, and the spring is disposed in the groove. One end of the spring abuts against the groove wall, and the other end abuts against the inner wall of the straight abutment assembly.
[0018] By adopting the above technical solution, when the inclined plane drives the slider to move, the spring will generate elastic deformation, providing additional rebound force for the slider's movement, ensuring that the slider's movement is more stable, preventing the slider from generating violent displacement or unstable oscillation, and ensuring that the slider can run smoothly and powerfully; and the spring ensures that the slider and the straight block can automatically return to their original positions after each operation.
[0019] In one specific implementation, the straight-push assembly includes a straight-push rod and a straight-push block. The straight-push block contacts the product, and the slider is embedded in the straight-push block. The straight-push rod is used to drive the straight-push block to push out and move the slider. When the slider moves to the corresponding position, the pusher applies pressure to the slider to drive the slider to push out the undercut.
[0020] By adopting the above technical solution, the straight push block can accurately transmit the driving force of the straight push rod to the product through contact with the product. Through the driving action of the straight push rod, the system can quickly and smoothly push the straight push block out, ensuring the rapid and stable movement or positioning of the product and improving operating efficiency.
[0021] In one specific implementation, the inclined ejector assembly includes an inclined ejector rod and an inclined ejector block. The inclined ejector block contacts the product, and the inclined ejector rod is slidably connected to the inclined ejector block. The inclined ejector rod is used to drive the inclined ejector block to eject, and the inclined ejector block slides relative to the inclined ejector rod. The inclined ejector block moves away from the straight ejector block and disengages from the product and the straight ejector block.
[0022] By adopting the above technical solution, the inclined ejector block can be driven by the inclined ejector rod to achieve fast and efficient product ejection. Through the sliding connection between the inclined ejector block and the inclined ejector rod, the movement of the inclined ejector block not only occurs in a straight line, but the angle or position can also be changed as needed, making the inclined ejector assembly more adaptable. This ensures that the inclined ejector block and the straight ejector block can be smoothly separated during the product ejection process, avoiding the situation where the product gets stuck or cannot be ejected.
[0023] In one specific implementation, the inclined top rod and the inclined top block are slidably connected by a mortise and tenon structure.
[0024] By adopting the above technical solution, the sliding fit of the mortise and tenon structure ensures that the inclined ejector block can smoothly detach from the product and the contact of the straight ejector block. Since the mortise and tenon structure itself has good self-positioning and strong connection capabilities, the fit between the inclined ejector block and the inclined ejector rod can remain accurate without additional adjustment, thereby reducing errors in operation and enabling each demolding process to be completed efficiently, thus improving the demolding speed.
[0025] In one specific implementation, the inclined top block is provided with an inclined slide rail structure.
[0026] By adopting the above technical solution and introducing the inclined slide rail structure, the inclined top block can be adjusted in angle and position during movement. Therefore, it can achieve accurate separation from the straight top block and the product, and provides a stable movement trajectory, making the movement of the inclined top block smoother and less prone to deviation or jamming.
[0027] In one specific implementation, a latching assembly is also included, which is used to control the travel of the direct-acting assembly.
[0028] By adopting the above technical solution and utilizing the design of the buckle assembly, the stroke of the direct-acting assembly can be limited, ensuring its stroke is accurate and stable. This prevents the direct-acting assembly from exceeding the predetermined maximum range of motion, thereby avoiding excessive or insufficient movement and ensuring that the working effect of the direct-acting assembly meets expectations.
[0029] In summary, the beneficial technical effects of this application are as follows: Through the synergistic effect of the angled ejector assembly, the straight ejector assembly, and the side ejector assembly, this application can effectively address the demolding requirements of large undercuts, making the demolding process smoother and more efficient. The angled ejector assembly, by separating from the product and mold surface, provides demolding space for the undercut, preventing the product from sticking to the mold surface, avoiding jamming, and improving the demolding success rate. The side ejector assembly can effectively eject the undercut from the mold, avoiding jamming and damage caused by the undercut, reducing breakage or defective products caused by the undercut, and improving product quality. Furthermore, this application can handle products with various complex structures, improving the versatility and adaptability of the mold. Its multi-angle ejection method makes the demolding process more flexible, ensuring smooth demolding of complex plastic parts while protecting the mold and plastic parts from damage, meeting the demand for high-quality and high-efficiency demolding in modern injection molding. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of the large-stroke inverted demolding mechanism in an embodiment of this application.
[0031] Figure 2 It is a sectional view used to show the positional relationship of the components of the demolding mechanism in the initial state.
[0032] Figure 3 It is a cross-sectional view used to show the angled top block and the straight top block separated from the product.
[0033] Figure 4 It is a cross-sectional view used to show when the slider pushes the inverted block out of the straight block.
[0034] Figure 5 It is a cross-sectional view used to show the product when the sloping top block is fully ejected.
[0035] Figure 6 This is a structural diagram used to demonstrate the inclined plane slide rail structure.
[0036] Explanation of reference numerals in the attached drawings: 1. Product; 11. Undercut; 2. Straight ejector assembly; 21. Straight ejector rod; 22. Straight ejector block; 3. Angled ejector assembly; 31. Angled ejector rod; 32. Angled ejector block; 4. Side ejection assembly; 41. Push block; 42. Slider; 43. Guide groove; 44. Drive slope; 45. Mating slope; 46. Groove; 5. Spring; 6. Mortise and tenon structure; 61. T-slot; 62. T-block; 7. Angled slide rail structure; 8. Demolding space. Detailed Implementation
[0037] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0038] Reference Figure 1This application discloses a long-stroke undercut demolding mechanism, including but not limited to demolding of product 1 applied to injection molds;
[0039] The long-stroke undercut demolding mechanism includes an inclined ejector assembly 3, a straight ejector assembly 2, and a side ejector assembly 4. The inclined ejector assembly 3 and the straight ejector assembly 2 abut against and are in contact with the product 1. The undercut 11 of the product 1 is located inside the straight ejector assembly 2 and is in contact with the side ejector assembly 4. The inclined ejector assembly 3 is used to disengage from the product 1 and the straight ejector assembly 2 during ejection to form a demolding space 8 for subsequent ejection of the undercut 11. The side ejector assembly 4 is used to eject the undercut 11 from the straight ejector assembly 2.
[0040] It also includes a locking mechanism (not shown in the figure), which is used to control the movement of the direct push assembly 2. When one push-out operation is completed, the locking mechanism controls the direct push assembly 2 to stop moving. The design of the locking mechanism can limit the stroke of the direct push assembly 2, ensuring that its stroke is accurate and stable, and can prevent the direct push assembly 2 from exceeding the predetermined maximum movement range, thereby avoiding excessive or insufficient movement, and ensuring that the working effect of the direct push assembly 2 reaches the expected level.
[0041] During demolding, the inclined ejector assembly 3 and the straight ejector assembly 2 are driven to move, and the inclined ejector assembly 3, the straight ejector assembly 2 and the product 1 are ejected together. During the ejection process, the inclined ejector assembly 3 will separate from the straight ejector assembly 2 and the product 1, forming a demolding space 8. At this time, the ejection continues, and the side ejector assembly 4 can eject the undercut 11 from the straight ejector assembly 2, completing one ejection operation. The locking assembly controls the straight ejector assembly 2 to stop moving and continues to drive the inclined ejector assembly 3 to eject. At this time, the product 1 is completely ejected under the action of the inclined ejector assembly 3, completing the second ejection operation.
[0042] Reference Figure 2-5 The straight push assembly 2 includes a straight push rod 21 and a straight push block 22. The product 1 and its buckle 11 are in contact with the straight push block 22. The top and right side of the straight push block 22 are in contact with the product 1. In this embodiment, the straight push block 22 is located on the upper side and the straight push rod 21 is located on the lower side. The straight push block 22 and the straight push rod 21 are fixed together by means of, but not limited to, pins. The straight push block 22 and the straight push rod 21 are both vertically arranged. The straight push rod 21 is used to drive the straight push block 22 to move vertically and push the product 1 upward.
[0043] By contacting the product 1, the straight push block 22 can accurately transmit the driving force of the straight push rod 21 to the product 1. Through the driving action of the straight push rod 21, the system can quickly and smoothly push the straight push block 22 out, ensuring the rapid and stable movement or positioning of the product 1, thereby improving operating efficiency.
[0044] The lateral ejection assembly 4 includes a lever 41 and a slider 42. In this embodiment, the lever 41 is vertically arranged and located on the side of the straight ejection block 22 away from the inclined ejection assembly 3, that is, the straight ejection assembly 2 is located between the lever 41 and the inclined ejection assembly 3. In this embodiment, the slider 42 is horizontally arranged and embedded in the straight ejection block 22. One end of the slider 42 contacts the inverted buckle 11, and the other end abuts against the lever 41. The straight ejection rod 21 drives the straight ejection block 22 to eject and moves the slider 42. When the slider 42 moves to the corresponding position, the lever 41 applies pressure to the slider 42 to drive the slider 42 to eject the inverted buckle 11.
[0045] The push block 41 is provided with a guide groove 43. The end of the slider 42 away from the undercut 11 is located in the guide groove 43 and moves within the guide groove 43. The guide groove 43 guides the movement of the slider 42, avoiding possible deviation or wobbling of the slider 42 during the movement, ensuring that the slider 42 always moves along the correct path, so that the contact between the slider 42 and the undercut 11 is always accurate, thereby reducing uneven contact between the slider 42 and the undercut 11 and ensuring the accuracy of the subsequent undercut 11 ejection process.
[0046] The guide groove 43 has a driving inclined surface 44 on its groove wall and a mating inclined surface 45 on its slider 42. The driving inclined surface 44 is used to press the mating inclined surface 45, thereby pressing the slider 42 to move horizontally to the right and push out the undercut 11. The driving inclined surface 44 applies a pressing force to the slider 42 through the inclined angle. This force can provide a stronger driving effect during the movement of the slider 42, so that the slider 42 can effectively push the undercut 11 out. Through the pressing action of the driving inclined surface 44, the slider 42 can complete the ejection of the undercut 11 in a shorter time. Due to the improved efficiency of the slider 42's movement, the ejection process is smoother and faster, thereby improving the overall production efficiency and automation level.
[0047] During operation, as the straight ejector rod 21 and the straight ejector block 22 are ejected, the straight ejector block 22 will drive the slider 42 on it to move together. At this time, the slider 42 moves along the guide groove 43, and the relative position between the slider 42 and the pusher block 41 changes. When the mating inclined surface 45 of the slider 42 moves to abut against the driving inclined surface 44 in the guide groove 43, the driving inclined surface 44 squeezes the mating inclined surface 45, that is, squeezes the slider 42 to move, and the slider 42 ejects the undercut 11. Through the cooperation of the pusher block 41 and the slider 42, the ejection process of the undercut 11 is more efficient and smooth. The separation of the undercut 11 from the product 1 is completed in the early stage of the demolding process, which will not affect the subsequent ejection steps, avoid possible jamming or stagnation, and thus improve the overall demolding efficiency.
[0048] The lateral ejection assembly 4 also includes a spring 5. The slider 42 has a groove 46 inside, and the spring 5 is located in the groove 46. One end of the spring 5 abuts against the groove wall of the groove 46, and the other end abuts against the inner wall of the straight ejector block 22. When the toggle block 41 drives the slider 42 to move to the right in the horizontal direction, the spring 5 will generate elastic deformation, providing additional rebound force for the movement of the slider 42, ensuring that the movement of the slider 42 is more stable and preventing the slider 42 from generating violent displacement or unstable oscillation. The spring 5 provides elastic support, enhancing the stable support force of the slider 42 throughout the movement, ensuring that the slider 42 can run smoothly and powerfully. In addition, the spring 5 ensures that the slider 42 and the straight ejector block 22 can automatically return to their original positions after each operation.
[0049] Reference Figure 2-5 The inclined ejector assembly 3 includes an inclined ejector rod 31 and an inclined ejector block 32. In this embodiment, during injection molding, the inclined ejector block 32 abuts against the straight ejector block 22, and the inclined ejector block 32 and the straight ejector block 22 together form a cavity for molding the product 1 and its undercut 11. The top and left side of the inclined ejector block 32 are in contact with the product 1.
[0050] The inclined top rod 31 and the inclined top block 32 are slidably connected by a mortise and tenon structure 6. In this embodiment, the mortise and tenon structure 6 includes, but is not limited to, a T-shaped groove 61 provided on the inclined top block 32 and a T-shaped block 62 provided on the inclined top rod 31. The T-shaped block 62 is inserted into the T-shaped groove 61 and slides and abuts against each other in the T-shaped groove 61.
[0051] The inclined ejector rod 31 and the inclined ejector block 32 are slidably connected by the mortise and tenon structure 6, allowing the inclined ejector block 32 to move freely under the drive of the inclined ejector rod 31. Through the sliding fit of the mortise and tenon structure 6, the inclined ejector block 32 can smoothly disengage from the product 1 and the straight ejector block 22. Since the mortise and tenon structure 6 itself has good self-positioning and strong connection capabilities, the fit between the inclined ejector block 32 and the inclined ejector rod 31 can remain accurate without additional adjustment, thereby reducing errors in operation and reducing unstable factors in the operation process, so that each demolding process can be completed efficiently, thereby improving the demolding speed.
[0052] Reference Figure 6 In this embodiment, the inclined push block 32 is provided with an inclined slide rail structure 7, which is used to guide the inclined push block 32 to move along an inclined direction. The introduction of the inclined slide rail structure 7 enables the inclined push block 32 to not only move along the predetermined push direction of the inclined push rod 31 during the movement, but also to change in angle or position, thereby accurately completing the separation from the straight push block 22 and the product 1; and it can also provide a stable motion trajectory, making the movement of the inclined push block 32 more stable and less prone to deviation or jamming.
[0053] In this embodiment, the inclined push rod 31 is set vertically. The inclined push rod 31 moves in the vertical direction and drives the inclined push block 32 to push out. At this time, due to the sliding connection between the inclined push block 32 and the inclined push rod 31 and the inclined slide rail structure 7 designed on the inclined push block 32, the inclined slide rail structure 7 guides the inclined push block 32 to move obliquely upward, so that the inclined push block 32 and the inclined push rod 31 slide relative to each other. The inclined push block 32 moves away from the straight push block 22 and disengages from the product 1 and the straight push block 22.
[0054] By driving the inclined push rod 31 to push the inclined push block 32, the product 1 can be ejected quickly and effectively. Through the sliding connection between the inclined push block 32 and the inclined push rod 31, and the guidance of the inclined slide rail structure 7, the movement of the inclined push block 32 can not only occur in a straight line, but also change the angle or position as needed, making the inclined push assembly 3 more adaptable. This ensures that the inclined push block 32 can smoothly disengage from the straight push block 22 during the ejection process of the product 1, avoiding the situation where the product 1 gets stuck or cannot be ejected.
[0055] Reference Figure 2-5 In this embodiment, the ejection direction of the inclined ejector block 32 forms an angle with the direction of the straight ejector block 22. The straight ejector block 22 moves upward in the vertical direction (Y-axis direction) to eject, pushing or separating the product 1 in a straight line. The ejection direction of the inclined ejector block 32 is along an inclined path that is both upward and to the right. The inclined ejector block 32 not only moves vertically upward (Y-axis direction) but also moves horizontally (X-axis direction), pushing the product 1 to move obliquely upward, so that the inclined ejector block 32 and the straight ejector block 22 separate to form a demolding space 8 for the subsequent ejection of the undercut 11. The ejection direction of the slider 42 is perpendicular to the ejection direction of the straight ejector block 22. The slider 42 moves to the right in the horizontal direction (X-axis direction) to push the undercut 11 of the product 1 out.
[0056] The implementation principle of this application embodiment is as follows: During demolding, the inclined ejector rod 31 and the straight ejector rod 21 are driven to move, which drives the inclined ejector block 32, the straight ejector block 22 and the product 1 to be ejected together. During the ejection process, due to the sliding connection between the inclined ejector block 32 and the inclined ejector rod 31 and the inclined slide rail structure 7 designed on the inclined ejector block 32, the inclined ejector block 32 and the inclined ejector rod 31 slide relative to each other. The inclined slide rail structure 7 guides the inclined ejector block 32 to move along an inclined path that is both upward and to the right, so that the inclined ejector block 32 moves away from the straight ejector block 22 and disengages from the product 1 and the straight ejector block 22, forming a demolding space 8.
[0057] At the same time, as the straight push rod 21 and the straight push block 22 are pushed out, the straight push block 22 will drive the slider 42 on it to move together. At this time, the slider 42 moves along the guide groove 43, and the relative position between the slider 42 and the push block 41 changes. When the mating inclined surface 45 of the slider 42 moves to abut against the driving inclined surface 44 in the guide groove 43, the driving inclined surface 44 squeezes the mating inclined surface 45, that is, squeezes the slider 42 to move to the right in the horizontal direction, and pushes the buckle 11 out from the straight push block 22, completing one push-out operation.
[0058] At this time, the buckle assembly controls the straight push assembly 2 to stop moving and continues to drive the inclined push assembly 3 to push out. The inclined slide rail structure 7 guides the inclined push block 32 to move along an inclined path that is both upward and to the right. The inclined push block 32 pushes the product 1 completely out of the straight push block 22, and the inclined push block 32 disengages from the product 1. The product 1 is completely pushed out under the action of the inclined push block 32, completing the secondary push-out operation.
[0059] Through the coordinated action of the angled ejector assembly 3, the straight ejector assembly 2, and the side ejector assembly 4, the demolding requirements of the large undercut 11 can be effectively met, making the demolding process smoother and more efficient. The angled ejector assembly 3, by separating from the product 1 and the mold surface, provides the demolding space 8 for the undercut 11 to be ejected, which can prevent the product 1 from sticking to the mold surface, avoid jamming, and improve the demolding success rate. The side ejector assembly 4 can effectively eject the undercut 11 from the mold, avoid jamming and damage caused by the undercut 11, reduce breakage or defective products caused by the undercut 11, and improve the quality of the product 1. Furthermore, this mechanism divides the entire demolding process into two stages through two ejections, so that the demolding problems of different parts can be addressed in each stage, improving the reliability and success rate of demolding.
[0060] This application can handle products with various complex structures, including plastic parts with special designs such as undercuts 11, sidewall structures, and through holes, improving the versatility and adaptability of the mold. Its multi-angle ejection method makes the demolding process more flexible. While ensuring the smooth demolding of complex plastic parts, it can protect the mold and plastic parts from damage, meeting the demand for high-quality and high-efficiency demolding in modern injection molding.
[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A long-stroke inverted demolding mechanism for demolding product (1), characterized in that: The device includes a slanted ejector assembly (3), a straight ejector assembly (2), and a lateral ejector assembly (4). The slanted ejector assembly (3) and the straight ejector assembly (2) abut against and are in contact with the product (1). The buckle (11) of the product (1) is located inside the straight ejector assembly (2) and is in contact with the lateral ejector assembly (4). The slanted ejector assembly (3) is used to disengage from the product (1) and the straight ejector assembly (2) during ejection. The lateral ejector assembly (4) is used to eject the buckle (11) from the straight ejector assembly (2).
2. The large-stroke undercut demolding mechanism according to claim 1, characterized in that: The lateral ejection assembly (4) includes a lever (41) and a slider (42). The lever (41) is located on the side of the straight ejection assembly (2) away from the inclined ejection assembly (3). The slider (42) is embedded in the straight ejection assembly (2). One end of the slider (42) contacts the buckle (11), and the other end abuts against the lever (41). The lever (41) is used to drive the slider (42) to move to eject the buckle (11).
3. The large-stroke undercut demolding mechanism according to claim 2, characterized in that: The push block (41) is provided with a guide groove (43), and the end of the slider (42) away from the buckle (11) is located in the guide groove (43) and moves in the guide groove (43).
4. The large-stroke undercut demolding mechanism according to claim 3, characterized in that: The guide groove (43) has a driving inclined surface (44) on its groove wall, and the slider (42) has a mating inclined surface (45). The driving inclined surface (44) is used to press the mating inclined surface (45).
5. The large-stroke undercut demolding mechanism according to claim 2, characterized in that: It also includes a spring (5), the slider (42) has a groove (46) inside, the spring (5) is located in the groove (46), one end of the spring (5) abuts against the groove wall of the groove (46), and the other end abuts against the inner wall of the straight top assembly (2).
6. The large-stroke undercut demolding mechanism according to claim 2, characterized in that: The straight push assembly (2) includes a straight push rod (21) and a straight push block (22). The straight push block (22) contacts the product (1), and the slider (42) is embedded in the straight push block (22). The straight push rod (21) is used to drive the straight push block (22) to push out and drive the slider (42) to move. When the slider (42) moves to the corresponding position, the push block (41) applies pressure to the slider (42) to drive the slider (42) to push out the buckle (11).
7. The large-stroke undercut demolding mechanism according to claim 6, characterized in that: The inclined push assembly (3) includes an inclined push rod (31) and an inclined push block (32). The inclined push block (32) contacts the product (1), and the inclined push rod (31) and the inclined push block (32) are slidably connected. The inclined push rod (31) is used to drive the inclined push block (32) to push out. The inclined push block (32) slides relative to the inclined push rod (31). The inclined push block (32) moves away from the straight push block (22) and disengages from the product (1) and the straight push block (22).
8. The large-stroke undercut demolding mechanism according to claim 7, characterized in that: The inclined top rod (31) and the inclined top block (32) are slidably connected by a mortise and tenon structure (6).
9. The large-stroke undercut demolding mechanism according to claim 7, characterized in that: The inclined top block (32) is provided with an inclined slide rail structure (7).
10. The large-stroke undercut demolding mechanism according to claim 1, characterized in that: It also includes a fastening assembly for controlling the travel of the direct-acting assembly (2).