An inclined ejection mechanism facilitating demolding

Abstract

The utility model discloses a kind of inclined ejector mechanism of easy demoulding, including cavity, slider block, ejector pin plate and at least two inclined ejector, the cavity is the circular space of adaptive product with reverse buckle, the slider block can linearly retreat in the direction away from cavity;The ejector pin plate is set between cavity and slider block, and keep position fixed in the process of slider block retreat.When slider block retreats, ejector pin plate forms forward displacement relative to slider block, and the reverse buckle of product is driven inclined ejector to rotate 0.2 °-0.5 ° away from the two sides of product around its rotary connection point with ejector pin plate, to release reverse buckle constraint and demould after. Overall structure does not need complex driving component, adaptability is strong, applicable to different size circular space reverse buckle product, improve demoulding efficiency and product qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a slanted ejector type demolding mechanism that facilitates demolding. Background Technology

[0002] In the field of mold demolding, conventional demolding mechanisms have significant limitations for products with undercut structures, especially when the undercut is located in a small, circular space. Traditional direct-ejector mechanisms cannot release the undercut constraint, and forced demolding can easily lead to product deformation or damage; ordinary slider mechanisms require a large lateral movement space, which is difficult to adapt to in a small, circular space and is prone to interference with the cavity or product; traditional angled ejector mechanisms often suffer from poor rotation angle control and uneven force distribution, resulting in an unstable demolding process and difficulty in adapting to the symmetrical constraint requirements of a circular space. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a sloping top demolding mechanism that facilitates demolding and can effectively solve the problems raised in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An easy-to-demold inclined ejector mechanism includes a cavity, a slider seat, an ejector plate, and at least two inclined ejectors. The cavity is a circular space adapted to a product with undercuts. The slider seat can retract linearly away from the cavity. The ejector plate is disposed between the cavity and the slider seat and remains in a fixed position during the retraction of the slider seat.

[0006] One end of the inclined ejector is rotatably connected to the ejector plate, and the other end is provided with a contact part adapted to the undercut of the product and abuts against the undercut. All the inclined ejectors are symmetrically distributed about the central axis of the cavity. When the slider seat retracts, the ejector plate moves forward relative to the slider seat. The undercut of the product drives the inclined ejector to rotate 0.2°-0.5° away from the product around the rotation connection point between it and the ejector plate through the contact part, so as to release the undercut constraint and demold.

[0007] As a further description of the above technical solution, a rotating shaft is provided at the rotation connection point between the inclined top and the ejector plate. The axial direction of the rotating shaft is perpendicular to the backward direction of the slider seat, and both ends of the rotating shaft are fixedly connected to the ejector plate. The inclined top is sleeved on the rotating shaft and can rotate around the rotating shaft.

[0008] As a further description of the above technical solution, the slider seat is provided with a guide slope on the side facing the ejector plate, and the side of the inclined ejector away from the product is provided with a mating slope adapted to the guide slope. The mating slope and the guide slope are in sliding contact. When the slider seat retracts, the guide slope applies a lateral force through the mating slope to drive the inclined ejector to rotate.

[0009] As a further description of the above technical solution, the contact portion of the inclined top is provided with an arc-shaped contact surface that fits against the undercut surface of the product, and the curvature of the arc-shaped contact surface is consistent with the curvature of the undercut surface.

[0010] As a further description of the above technical solution, the rotation angle of the inclined top is 0.3°-0.4°.

[0011] As a further description of the above technical solution, a guide structure is provided between the slider seat and the ejector plate. The guide structure includes a guide groove extending along the backward direction of the slider seat and a guide block slidably embedded in the guide groove. The guide groove is located on the side of the slider seat facing the ejector plate, and the guide block is located on the side of the ejector plate facing the slider seat.

[0012] As a further description of the above technical solution, the number of the inclined tops is two, and the two inclined tops are symmetrically distributed with the central axis of the cavity as the axis of symmetry.

[0013] As a further description of the above technical solution, the angle between the guide slope and the backward direction of the slider seat is 30°-45°.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The inclined ejector type demolding mechanism of this utility model facilitates demolding and has at least one of the following beneficial effects during use:

[0016] The relative motion created by the sliding block retracting and the ejector plate driving the angled ejector to rotate at a small angle of 0.2°-0.5° precisely releases the undercut constraint, effectively solving the problem of difficult demolding in confined spaces with conventional structures. The angled ejectors are symmetrically distributed about the cavity's central axis, and the curved contact surface matches the curvature of the undercut surface, ensuring uniform force distribution and preventing scratches or deformation due to excessive localized force. The fixed connection between the rotating shaft and the ejector plate ensures the coaxiality of the angled ejector rotation. The guide groove and guide block structure restrict the sliding block's movement direction, improving the mechanism's operational stability. The 30°-45° angled guide slope and mating slope ensure smooth force transmission and reduce impact. The overall structure requires no complex drive components, offering strong adaptability and suitability for undercut products in circular spaces of different sizes, improving demolding efficiency and product yield. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a slanted ejector type demolding mechanism that facilitates demolding according to this utility model;

[0018] Figure 2 This is a partial cross-sectional structural diagram of a sloping-top demolding mechanism that facilitates demolding according to this utility model.

[0019] Numbering on the map:

[0020] 1. Cavity; 2. Angled ejector; 3. Slider seat; 4. Ejector plate; 5. Rotary shaft; 6. Guide structure. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-2 As shown, this utility model provides a slanted ejector type demolding mechanism for easy demolding, including a cavity 1, a slider seat 3, an ejector plate 4 and at least two slanted ejectors 2. The cavity 1 is a circular space adapted to a product with undercuts. The slider seat 3 can retract linearly in a direction away from the cavity 1. The ejector plate 4 is disposed between the cavity 1 and the slider seat 3, and its position remains fixed during the retraction of the slider seat 3.

[0023] Since the product is inverted in a circular space and the space is small, conventional structures are not convenient for demolding. During the slide's retraction, the ejector plate 4 remains stationary, which is equivalent to the ejector plate 4 pushing forward. In this embodiment, the inverted part of the product can drive the inclined ejector 2 to rotate 0.2°-0.5° to both sides to open the demolding.

[0024] In this embodiment, the cavity 1 serves as a circular space to accommodate the product to be demolded; at least two angled ejectors 2 are symmetrically distributed around the central axis of the cavity 1, with one end of each ejector pin 4 rotatably connected to the ejector plate 4 via a rotating shaft 5, and the contact portion (with an arc-shaped contact surface) of the other end tightly abutting against the undercut of the product to ensure contact with the undercut surface; the slider seat 3 is located on the side of the ejector plate 4 away from the cavity 1, and initially slides in contact with the inclined surface of the angled ejector 2 through the guide inclined surface.

[0025] One end of the inclined ejector 2 is rotatably connected to the ejector plate 4, and the other end is provided with a contact part adapted to the undercut of the product and abuts against the undercut. All the inclined ejectors 2 are symmetrically distributed about the central axis of the cavity 1. When the slider seat 3 retracts, the ejector plate 4 forms a forward displacement relative to the slider seat 3. The undercut of the product drives the inclined ejector 2 to rotate 0.2°-0.5° away from the product around the rotation connection point between it and the ejector plate 4 through the contact part, so as to release the undercut constraint and demold.

[0026] When demolding is required, the slide block 3 retracts linearly away from the cavity 1. At this time, the ejector plate 4 remains in a fixed position and moves forward relative to the slide block 3. On one hand, the product is pushed forward by the relative forward movement of the ejector plate 4, and its undercut exerts a force on the angled ejector 2 through the contact part of the angled ejector 2; on the other hand, when the slide block 3 retracts, its guide slope slides relative to the mating slope of the angled ejector 2, and the guide slope (at an angle of 30°-45° with the retraction direction) exerts a lateral force on the mating slope. Under the combined action of the above two forces, the angled ejector 2 rotates around the rotation axis 5 (the axis is perpendicular to the retraction direction of the slide block 3) connected to the ejector plate 4, moving away from the product to both sides.

[0027] The rotation angle of the inclined ejector 2 is controlled within 0.2°-0.5° (preferably 0.3°-0.4°). This small rotation angle can precisely release the engagement constraint between the product's undercut and the contact part of the inclined ejector 2. At the same time, the guide structure 6 (guide groove and guide block) between the slider seat 3 and the ejector plate 4 ensures the stability of the slider seat 3 in the backward direction, avoiding deviation that would cause uneven force on the inclined ejector 2; the symmetrically distributed inclined ejectors 2 (preferably two) ensure balanced force on the product and prevent skewing.

[0028] When the angled ejector 2 rotates to the preset angle (0.2°-0.5°), the product's undercut and the contact part with the angled ejector 2 are completely released from the constraint. Under the relative pushing force of the ejector plate 4, the product is smoothly ejected from the circular cavity 1, completing the demolding process.

[0029] Furthermore, a rotating shaft 5 is provided at the rotational connection point between the inclined ejector 2 and the ejector plate 4. The axis of the rotating shaft 5 is perpendicular to the retraction direction of the slider seat 3, and both ends of the rotating shaft 5 are fixedly connected to the ejector plate 4. The inclined ejector 2 is sleeved on the rotating shaft 5 and can rotate around the rotating shaft 5. Through the relative movement formed by the retraction of the slider seat 3 and the fixation of the ejector plate 4, the inclined ejector 2 is driven to rotate only 0.2°-0.5° (small angle), avoiding product deformation or damage caused by excessive movement of the inclined ejector 2. At the same time, the sliding fit between the guide inclined surface with an included angle of 30°-45° and the mating inclined surface makes the rotational force transmission of the inclined ejector 2 smooth and reduces impact.

[0030] Furthermore, the slider seat 3 has a guide slope on the side facing the ejector plate 4, and the inclined ejector 2 has a mating slope adapted to the guide slope on the side away from the product. The mating slope and the guide slope are in sliding contact. When the slider seat 3 retracts, the guide slope applies a lateral force through the mating slope to drive the inclined ejector 2 to rotate. The connection method of fixing the rotating shaft 5 to the ejector plate 4 and rotating the inclined ejector 2 ensures the coaxiality of the inclined ejector 2's rotation. The guide groove-guide block structure between the slider seat 3 and the ejector plate 4 restricts the movement direction of the slider seat 3, preventing its deviation from causing force disorder in the inclined ejector 2 and improving the overall operational stability of the mechanism.

[0031] Furthermore, the contact portion of the inclined top 2 is provided with an arc-shaped contact surface that conforms to the undercut surface of the product, and the curvature of the arc-shaped contact surface is consistent with the curvature of the undercut surface. The inclined tops 2 are symmetrically distributed (preferably two) around the central axis of the cavity 1, and the arc-shaped contact surface (with the same curvature as the undercut surface) ensures that the contact force between the inclined top 2 and the undercut of the product is uniform, preventing scratches or deformation of the product due to excessive local force.

[0032] Furthermore, the rotation angle of the inclined top 2 is 0.3°-0.4°.

[0033] Furthermore, a guide structure 6 is provided between the slider seat 3 and the ejector plate 4. The guide structure 6 includes a guide groove extending along the backward direction of the slider seat 3 and a guide block slidably embedded in the guide groove. The guide groove is located on the side of the slider seat 3 facing the ejector plate 4, and the guide block is located on the side of the ejector plate 4 facing the slider seat 3.

[0034] The guide groove-guide block structure between the slider seat 3 and the ejector plate 4 restricts the movement direction of the slider seat 3, prevents it from deviating and causing the inclined ejector 2 to be subjected to disordered force, and improves the overall operational stability of the mechanism.

[0035] Furthermore, there are two inclined ejectors 2, which are symmetrically distributed about the central axis of the cavity 1. The connection between the rotating shaft 5 and the ejector plate 4, and the inclined ejectors 2 being fitted and rotated, ensures the coaxiality of the rotation of the inclined ejectors 2.

[0036] Furthermore, the angle between the guide ramp and the backward movement direction of the slider seat 3 is 30°-45°. Automatic demolding is achieved through the relative movement of the mechanical structure, eliminating the need for additional complex drive components; the small-angle rotation design makes the mechanism suitable for compact circular cavities 1, and provides good adaptability to circular space undercut products of different sizes.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A slanted ejector type demolding mechanism for easy demolding, characterized in that: It includes a cavity, a slider seat, an ejector plate, and at least two inclined ejectors. The cavity is a circular space adapted to a product with an undercut. The slider seat can retract linearly away from the cavity. The ejector plate is disposed between the cavity and the slider seat and remains in a fixed position during the retraction of the slider seat. One end of the inclined ejector is rotatably connected to the ejector plate, and the other end is provided with a contact part adapted to the undercut of the product and abuts against the undercut. All the inclined ejectors are symmetrically distributed about the central axis of the cavity. When the slider seat retracts, the ejector plate moves forward relative to the slider seat. The undercut of the product drives the inclined ejector to rotate 0.2°-0.5° away from the product around the rotation connection point between it and the ejector plate through the contact part, so as to release the undercut constraint and demold.

2. The inclined ejector type demolding mechanism for easy demolding according to claim 1, characterized in that: A rotating shaft is provided at the rotation connection point between the inclined top and the ejector plate. The axis of the rotating shaft is perpendicular to the backward direction of the slider seat, and both ends of the rotating shaft are fixedly connected to the ejector plate. The inclined top is sleeved on the rotating shaft and can rotate around the rotating shaft.

3. The inclined ejector type demolding mechanism for easy demolding according to claim 1, characterized in that: The slider seat has a guide slope on the side facing the ejector plate, and the inclined ejector has a mating slope that matches the guide slope on the side away from the product. The mating slope and the guide slope are in sliding contact. When the slider seat moves backward, the guide slope applies a lateral force through the mating slope to drive the inclined ejector to rotate.

4. The inclined ejector type demolding mechanism for easy demolding according to claim 1, characterized in that: The contact portion of the sloping top is provided with an arc-shaped contact surface that fits against the undercut surface of the product, and the curvature of the arc-shaped contact surface is consistent with the curvature of the undercut surface.

5. The inclined ejector type demolding mechanism for easy demolding according to claim 1, characterized in that: The rotation angle of the inclined plane is 0.3°-0.4°.

6. The inclined ejector type demolding mechanism for easy demolding according to claim 1, characterized in that: A guide structure is provided between the slider seat and the ejector plate. The guide structure includes a guide groove extending along the backward direction of the slider seat and a guide block slidably embedded in the guide groove. The guide groove is located on the side of the slider seat facing the ejector plate, and the guide block is located on the side of the ejector plate facing the slider seat.

7. The inclined ejector type demolding mechanism for easy demolding according to claim 1, characterized in that: The number of the inclined jacks is two, and the two inclined jacks are symmetrically distributed with the central axis of the cavity as the axis of symmetry.

8. The inclined ejector type demolding mechanism for easy demolding according to claim 3, characterized in that: The angle between the guide ramp and the backward movement direction of the slider seat is 30°-45°.

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