A demolding anti-sticking conical spring structure

Abstract

The utility model provides a kind of taper bullet structure of demoulding anti-adhesion belongs to bullet structure technical field, this taper bullet structure of demoulding anti-adhesion includes taper body and the anti-adhesion structure being set on taper body, the taper body is hollow frustum shape, the big end surface of taper body is open end, the small end surface of taper body is closed end, the anti-adhesion structure includes multiple elastic projections, multiple elastic projections are equidistributed and are set on the outer surface of taper body along the circumference of taper body, the elastic projection extends outward from the outer surface of taper body, when taper bullet structure is installed in mould cavity inner wall, the outer end surface of elastic projection and mould cavity inner wall abut and produce elastic deformation, the elastic projection exerts radial support force to mould cavity inner wall in elastic deformation state, solve the problem that taper bullet is easily adhered in mould cavity, demoulding difficult, realize radial support and anti-adhesion function by elastic projection structure.

Description

Technical Field

[0001] This utility model belongs to the field of spring sheet technology, specifically, it relates to a conical spring sheet structure for demolding and anti-sticking. Background Technology

[0002] In the molding process of plastic products, rubber products, and metal castings, conical springs are a commonly used mold auxiliary structure, widely applied in the molding of various conical or frustum-shaped products. Conical springs are typically installed on the inner wall of the mold cavity to support, position, or assist in molding specific parts of the product. In traditional mold molding processes, the smooth, conical outer surface of the conical spring directly contacts the inner wall of the mold cavity. While this structure provides some support, it has significant drawbacks in practical use. Due to the large contact area between the outer surface of the conical spring and the inner wall of the mold cavity, strong adhesion forces develop between the conical spring and the inner wall of the mold cavity after the molding material has solidified or cooled, especially... This adhesion phenomenon is more severe when high-temperature molding or using molding materials with high viscosity. During the demolding process, a large external force is required to remove the product from the mold, which not only increases the difficulty and time cost of demolding, but also easily causes scratches, deformation or even cracks on the surface of the product. At the same time, frequent and forceful demolding operations will also accelerate the wear of the inner wall of the mold cavity and shorten the service life of the mold. In order to solve this technical problem, the existing technology usually uses the method of coating the surface of the conical spring with a release agent or using a lubricant to reduce the adhesion force. However, this method requires frequent addition of release agent or lubricant, which not only increases production costs and processes, but also the residue of release agent or lubricant will contaminate the surface of the product and the mold, affecting product quality and mold cleanliness. Utility Model Content

[0003] In view of this, the present invention provides a conical spring sheet structure for demolding and anti-sticking, which solves the problem of conical spring sheets being easy to stick in the mold cavity and difficult to demold, and achieves radial support and anti-sticking function through the elastic protrusion structure.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a conical spring sheet structure for demolding and anti-sticking, comprising a conical body and an anti-sticking structure disposed on the conical body. The conical body is a hollow frustum shape, with the large end face of the conical body being an open end and the small end face being a closed end. The anti-sticking structure includes multiple elastic protrusions, which are evenly distributed along the circumference of the conical body on its outer surface. The elastic protrusions extend outward from the outer surface of the conical body. When the conical spring sheet structure is installed on the inner wall of the mold cavity, the outer end face of the elastic protrusion abuts against the inner wall of the mold cavity and generates elastic deformation. Under the elastic deformation state, the elastic protrusion applies a radial supporting force to the inner wall of the mold cavity.

[0006] The technical effects of the conical spring sheet structure for demolding and anti-sticking provided by this utility model are as follows: By setting multiple circumferentially distributed elastic protrusions on the outer surface of the conical body, when the conical spring sheet structure is installed on the inner wall of the mold cavity, the outer end face of the elastic protrusion abuts against the inner wall of the mold cavity and generates elastic deformation, so that the elastic protrusion applies radial support force to the inner wall of the mold cavity. This radial support force forms multiple point-like or line-like contact areas between the conical spring sheet structure and the inner wall of the mold cavity, which significantly reduces the contact area between the conical spring sheet structure and the inner wall of the mold cavity, thereby effectively reducing the adhesion force and frictional resistance during demolding, making the demolding process smoother. At the same time, the elastic deformation of the elastic protrusion can adapt to the small deformation and dimensional deviation of the inner wall of the mold cavity, ensuring the stable positioning of the conical spring sheet structure in the mold cavity.

[0007] Based on the above technical solution, the conical spring sheet structure for demolding and anti-sticking of this utility model can be further improved as follows:

[0008] Wherein, the length of the elastic protrusion along the axial direction of the conical body is greater than the width of the elastic protrusion along the circumferential direction of the conical body.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the length of the elastic protrusion along the axial direction of the conical body greater than its width along the circumferential direction, a slender elastic protrusion structure is formed. This shape design allows the elastic protrusion to generate a larger amount of elastic deformation when subjected to radial pressure, thereby enhancing the buffering performance and adaptability of the elastic protrusion. At the same time, the slender elastic protrusion can provide a longer contact line in the axial direction, which is beneficial for guiding the conical spring structure to move smoothly along the axial direction during demolding, reducing the offset and jamming phenomenon during demolding, and improving the reliability and stability of demolding.

[0010] Furthermore, the edge of the open end of the conical body extends outward to form a flange structure, which is in the shape of an annular plate, and the extension direction of the flange structure is perpendicular to the axis of the conical body.

[0011] The beneficial effects of the above-mentioned improvement scheme are as follows: by extending the edge of the opening end of the conical body outward to form an annular plate-shaped flange structure, and making the extension direction of the flange structure perpendicular to the axis of the conical body, a stable support surface and positioning reference are provided for the conical spring structure. When installed, the flange structure can contact the positioning surface or fixing surface of the mold, restricting the movement of the conical spring structure in the axial direction and preventing the conical spring structure from penetrating into the mold cavity due to force during the molding process. At the same time, the flange structure increases the strength and rigidity of the opening end of the conical body, avoiding deformation or damage to the opening end under force, and extending the service life of the conical spring structure.

[0012] Furthermore, the cross-sectional shape of the elastic protrusion is trapezoidal or triangular.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the cross-sectional shape of the elastic protrusion as trapezoidal or triangular, an elastic protrusion with a gradual structure is formed. This cross-sectional shape makes the thickness of the elastic protrusion gradually decrease from the root to the outer end, which can generate a more uniform stress distribution when subjected to radial pressure, avoiding stress concentration that could lead to breakage or permanent deformation of the elastic protrusion. At the same time, the trapezoidal or triangular cross-sectional shape gives the elastic protrusion a good guiding effect, which can guide the product to slide smoothly along the inclined surface of the elastic protrusion during the demolding process, further reducing demolding resistance and improving demolding efficiency.

[0014] Furthermore, the number of elastic protrusions is 6 to 12, and the interval between two adjacent elastic protrusions is equal.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the number of elastic protrusions to 6 to 12 and making the interval between two adjacent elastic protrusions equal, a uniformly distributed support point is formed in the circumferential direction of the conical body. This uniformly distributed support structure makes the radial support force of the conical spring structure in the mold cavity evenly distributed, avoiding the tilting or displacement of the conical spring structure caused by uneven support force. At the same time, an appropriate number of elastic protrusions ensures sufficient support strength and avoids the increase in contact area caused by too many elastic protrusions. A good balance is achieved between support performance and anti-stick performance, ensuring the stability and demolding performance of the conical spring structure.

[0016] Furthermore, the outer end face of the elastic protrusion is an arc-shaped surface, and the radius of curvature of the arc-shaped surface is adapted to the radius of curvature of the inner wall of the mold cavity.

[0017] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by designing the outer end face of the elastic protrusion as an arc-shaped surface and matching its radius of curvature with the radius of curvature of the inner wall of the mold cavity, a good fit between the outer end face of the elastic protrusion and the inner wall of the mold cavity is achieved. This matching design allows the elastic protrusion to form a line contact with the inner wall of the mold cavity instead of a point contact under elastic deformation, increasing the length of the contact line and improving the stability of the conical spring structure in the mold cavity. At the same time, the arc-shaped surface design reduces the peak contact stress, reduces wear on the inner wall of the mold cavity, extends the service life of the mold, and the arc-shaped surface can better adapt to the shape changes of the inner wall of the mold cavity.

[0018] Furthermore, the wall thickness of the conical body gradually decreases from the open end to the closed end along the axial direction, and the wall thickness of the conical body at the open end is greater than the wall thickness of the conical body at the closed end.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the wall thickness of the conical body gradually decrease from the open end to the closed end along the axial direction and making the wall thickness at the open end greater than that at the closed end, a conical body with a variable wall thickness structure is formed. This wall thickness distribution design makes the conical body have greater strength and rigidity at the open end, which can withstand greater forces during installation and molding. The thinner wall thickness at the closed end gives this part better elasticity and flexibility. During demolding, the closed end can generate greater elastic deformation, which is convenient for removal from the mold cavity. At the same time, the variable wall thickness structure optimizes the overall weight distribution of the conical spring structure, reducing the overall weight while ensuring strength.

[0020] Furthermore, the conical body is made of an elastic metal material or an elastic polymer material.

[0021] By making the conical body from elastic metal or elastic polymer materials, the conical spring structure is endowed with good elastic deformation capability and recovery performance. Elastic metal materials have high strength and fatigue resistance, making them suitable for applications requiring large forces and frequent use, while elastic polymer materials have good chemical stability and corrosion resistance, making them suitable for applications requiring contact with chemicals or use in corrosive environments. The elastic properties of the materials ensure that the elastic protrusions can maintain stable elastic deformation capability during repeated installation and demolding, and will not fail due to fatigue, thus extending the service life of the conical spring structure.

[0022] Furthermore, the elastic protrusion and the conical body are integrally formed.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the elastic protrusion and the conical body an integral molding structure, the connection gap and interface between the elastic protrusion and the conical body are eliminated, avoiding the phenomenon of elastic protrusion falling off or breaking due to insufficient strength of the connection part. The integral molding structure enables the continuous transmission of stress between the elastic protrusion and the conical body, improving the strength and reliability of the overall structure. At the same time, the integral molding structure simplifies the manufacturing process, reduces production costs, and the smooth and seamless surface of the integral molding helps to reduce the adhesion of the product during demolding, further improving the anti-stick performance and demolding efficiency, and ensuring the long-term stable use of the conical spring structure.

[0024] Furthermore, the ratio of the outer diameter of the flange structure to the inner diameter of the opening end of the conical body is 1.2 to 1.8, and the ratio of the height of the elastic protrusion extending outward from the outer surface of the conical body to the wall thickness of the conical body is 0.5 to 2.0.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by limiting the ratio of the outer diameter of the flange structure to the inner diameter of the opening end of the conical body to 1.2 to 1.8, and the ratio of the height of the elastic protrusion extending outward from the outer surface of the conical body to the wall thickness of the conical body to 0.5 to 2.0, the optimal configuration of the flange structure size and the height of the elastic protrusion is achieved. The reasonable ratio of the outer diameter of the flange structure to the inner diameter of the opening end ensures that the flange structure has sufficient support area without excessively increasing the overall size, which is convenient for installation and use. The reasonable ratio of the height of the elastic protrusion to the wall thickness ensures that the elastic protrusion has sufficient elastic deformation capacity without being too high and easily breaking. The optimization of these dimensional relationships enables the conical spring sheet structure to achieve the best balance between support performance, anti-stick performance and structural strength.

[0026] Compared with existing technologies, the beneficial effects of the conical spring sheet structure for demolding and anti-sticking provided by this utility model are as follows: This utility model provides multiple circumferentially distributed elastic protrusions on the outer surface of the conical body. When the conical spring sheet structure is installed on the inner wall of the mold cavity, the elastic protrusions abut against the inner wall of the mold cavity and undergo elastic deformation, forming multiple dispersed contact points or contact lines. This significantly reduces the contact area between the conical spring sheet structure and the inner wall of the mold cavity, thereby greatly reducing the adhesion force and frictional resistance during demolding, making the demolding process smooth and quick, effectively avoiding product damage and mold wear. Simultaneously, the radial support force generated by the elastic deformation of the elastic protrusions can hold the conical spring sheet in place. The structure is stably fixed in a predetermined position within the mold cavity, preventing displacement and tilting during the molding process and ensuring the dimensional accuracy and shape quality of the product. Furthermore, by optimizing the shape, number, and distribution of elastic protrusions, as well as the wall thickness distribution and material selection of the conical body, this invention achieves a comprehensive improvement in support performance, anti-sticking performance, and structural strength. Compared with existing technologies, this invention has a simple structure, is easy to manufacture, and is inexpensive. It is suitable for mold forming processes of various conical products, has broad application prospects, and significant economic benefits. It can effectively improve production efficiency, reduce production costs, and improve product quality, meeting the urgent needs of modern industrial production for efficient and high-quality mold forming technology. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 An example diagram of a cone-shaped spring sheet structure for demolding and anti-sticking;

[0029] Figure 2 A top view of a cone-shaped spring sheet structure with no flange for demolding and anti-sticking;

[0030] Figure 3 A perspective view of a cone-shaped spring structure for mold release and anti-sticking;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Conical body; 11. Flanged structure; 20. Anti-stick structure; 21. Elastic protrusion. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figures 1-3 The diagram shown is an example of a conical spring sheet structure for demolding and anti-sticking provided by this utility model. It includes a conical body 10 and an anti-sticking structure 20 disposed on the conical body 10. The conical body 10 is a hollow frustum shape. The large end face of the conical body 10 is an open end, and the small end face of the conical body 10 is a closed end. The anti-sticking structure 20 includes a plurality of elastic protrusions 21. The plurality of elastic protrusions 21 are evenly distributed along the circumference of the conical body 10 on the outer surface of the conical body 10. The elastic protrusions 21 extend outward from the outer surface of the conical body 10. When the conical spring sheet structure is installed on the inner wall of the mold cavity, the outer end face of the elastic protrusion 21 abuts against the inner wall of the mold cavity and generates elastic deformation. The elastic protrusion 21 applies radial support force to the inner wall of the mold cavity in the elastic deformation state.

[0035] The specific operation or use method is as follows: When using the conical spring structure for demolding and anti-sticking of this utility model, firstly, select a conical spring structure of appropriate specifications according to the inner diameter of the mold cavity, ensuring that the outer diameter of the conical body is slightly larger than the inner diameter of the mold cavity so that the elastic protrusion can generate appropriate contact pressure with the inner wall of the mold cavity. Then, align the small end, i.e., the closed end, of the conical spring structure with the opening of the mold cavity and slowly push it in along the axial direction of the mold cavity. During the pushing process, the elastic protrusion will gradually contact the inner wall of the mold cavity and generate elastic deformation. When the conical spring structure is completely inserted into the mold cavity and the flange structure fits against the positioning surface of the mold, it indicates that the conical spring structure has been installed in place. At this time, the elastic protrusion will generate appropriate contact pressure with the inner wall of the mold cavity. Under the deformation state, a uniform radial support force is applied to the inner wall of the mold cavity to stably fix the conical spring structure inside the mold cavity. Then, normal mold forming operation is carried out. After the molding material has solidified or cooled, the demolding operation begins. During demolding, an axial tensile force is applied from the large end, i.e., the open end, of the conical spring structure. Since the contact area between the elastic protrusion and the inner wall of the mold cavity is very small, the demolding resistance is significantly reduced. Only a small tensile force is needed to smoothly remove the conical spring structure along with the product from the mold cavity. After demolding, check whether the elastic protrusion of the conical spring structure is intact. If it is damaged, it should be replaced in time. For continuous production, multiple conical spring structures can be used alternately to improve production efficiency.

[0036] In the above technical solution, the length of the elastic protrusion 21 along the axial direction of the conical body 10 is greater than the width of the elastic protrusion 21 along the circumferential direction of the conical body 10.

[0037] Furthermore, in the above technical solution, the edge of the opening end of the conical body 10 extends outward to form a flange structure 11. The flange structure 11 is in the shape of an annular plate, and the extension direction of the flange structure 11 is perpendicular to the axis of the conical body 10.

[0038] Furthermore, in the above technical solution, the cross-sectional shape of the elastic protrusion 21 is trapezoidal or triangular.

[0039] Furthermore, in the above technical solution, the number of elastic protrusions 21 is 6 to 12, and the interval between two adjacent elastic protrusions 21 is equal.

[0040] Furthermore, in the above technical solution, the outer end face of the elastic protrusion 21 is an arc-shaped curved surface, and the radius of curvature of the arc-shaped curved surface is adapted to the radius of curvature of the inner wall of the mold cavity.

[0041] Furthermore, in the above technical solution, the wall thickness of the conical body 10 gradually decreases from the open end to the closed end along the axial direction, and the wall thickness of the conical body 10 at the open end is greater than the wall thickness of the conical body 10 at the closed end.

[0042] Furthermore, in the above technical solution, the conical body 10 is made of elastic metal material or elastic polymer material.

[0043] Furthermore, in the above technical solution, the elastic protrusion 21 and the conical body 10 are integrally formed.

[0044] Furthermore, in the above technical solution, the ratio of the outer diameter of the flange structure 11 to the inner diameter of the opening end of the conical body 10 is 1.2 to 1.8, and the ratio of the height of the elastic protrusion 21 extending outward from the outer surface of the conical body 10 to the wall thickness of the conical body 10 is 0.5 to 2.0.

[0045] Example 1: Using 0.3mm thick 301 stainless steel strip, after continuous stamping, rolling, vacuum quenching, and tempering, an integral conical body with a large end inner diameter of Φ40mm, a cone angle of 30°, and a closed small end is obtained. The outer diameter of the flange is Φ56mm (flange ratio 1.4), and a pressure-reducing groove with a radius of 0.5mm is machined at the root of the flange to prevent deformation of the rolled edge due to injection pressure. Ten elastic protrusions are evenly distributed on the outer surface. The cross-section of the protrusion is an isosceles trapezoid with an upper base of 0.6mm, a lower base of 1.2mm, a height of 1.0mm, a length (along the generatrix direction) of 8mm, and a width (circumferential direction) of 2mm, with an aspect ratio of 4:1. The outer end face of the protrusion is a 60mm spherical grinding area, consistent with the curvature of the cavity. The ratio of the protrusion to the body wall thickness is 1.67, satisfying the range of 0.5-2.0. The entire surface of the spring is electroplated with a Ni-P-PTFE composite coating, reducing the coefficient of friction to 0.08 and providing heat resistance up to 280℃.

[0046] Deep-cavity injection molding of nylon 66 housing for automotive ignition coils. The inner cavity of this plastic part is 120mm deep with a side draft angle of only 1°. Traditional demolding requires 0.6MPa compressed air assistance, but still results in whitening due to vacuum adhesion. This spring is pre-placed into the fixed mold cavity, with its flanged edge hanging on the positioning platform. After mold closing, the protrusion is compressed by 0.15mm, generating 18N radial tension, creating a 0.05mm uniform venting gap between the spring and the cavity wall. During the injection molding holding pressure stage, melt shrinkage increases the clamping force, and the spring's elastic recovery compensates by 0.08mm, maintaining a constant sliding clearance. At the moment of mold opening after cooling, the radial support of the spring prevents the plastic part from moving downwards with the core, while the microgrooves on the protrusion surface break the vacuum, allowing the plastic part to be smoothly ejected under the action of the ejector pin. The cycle time is shortened by 15%, with no whitening or tearing defects, and the spring life reaches 500,000 cycles.

[0047] Example 2: Polyether-type TPU granules with a Shore A75° were used and injection molded after dehumidification at 80°C. The conical body has an inner diameter of Φ22mm at the large end, a cone angle of 20°, and a wall thickness that gradually decreases from 0.8mm at the open end to 0.4mm at the closed end. The outer diameter of the flange is Φ34mm (flange ratio 1.55), and three Φ1mm semi-circular notches are evenly distributed on the lower side of the flange for easy removal by compressed air. Six elastic protrusions are integrally molded on the outer surface, with a triangular cross-section, a 60° apex angle, a height of 0.5mm, a generatrix length of 6mm, a circumferential width of 1.5mm, and an aspect ratio of 4:1. The top of the protrusions is ground into a 0.3mm spherical crown to match the curvature of the chrome plating layer in the cavity. The protrusion / wall thickness ratio is 0.625, falling within the 0.5-2.0 range. The entire spring sheet is annealed at 120°C for 2 hours after molding to eliminate internal stress and ensure that the permanent deformation after 100,000 compression cycles is <8%.

[0048] High-speed injection molding of silicone inner caps for lipstick tubes. The inner cap has a wall thickness of only 0.3mm and a height of 25mm, with an inner ring-shaped undercut. Traditional demolding requires three sets of angled ejectors, resulting in complex molds that easily scratch the transparent plastic parts. Using this spring clip, it is manually placed into the moving mold cavity, and the flange is embedded into the positioning groove. During mold closing, the protrusion is compressed by 0.12mm, generating a 5N radial preload, maintaining a 0.03mm venting gap between the spring clip and the cavity. The TPU spring clip is soft and will not scratch the high-gloss chrome-plated cavity. The injection cycle is 3.2s. During the ejection stage, the elastic recovery of the spring clip helps the plastic part detach from the undercut, while the micro-protrusions on the protruding surface break the vacuum adsorption. Due to the elasticity of the spring clip itself, it can be sucked out by a robotic arm along with the plastic part and automatically falls into a collection box online, achieving unmanned production. The spring clip can be returned to the mold for recycling via a belt conveyor. Actual testing shows that after 300,000 cycles, the surface wear is <0.02mm, still meeting dimensional tolerances, significantly reducing the cost of the angled ejector mechanism and downtime maintenance.

[0049] Specifically, the principle of this utility model is as follows: The core technical principle of this utility model lies in changing the contact method between the conical spring sheet structure and the inner wall of the mold cavity, transforming the traditional large-area surface contact into a multi-point or multi-line small-area contact, thereby fundamentally reducing adhesion and frictional resistance. Specifically, multiple circumferentially distributed elastic protrusions are set on the outer surface of the conical body. When the conical spring sheet structure is pressed into the inner wall of the mold cavity, the elastic protrusions first contact the inner wall of the mold cavity. Due to the certain height and elasticity of the elastic protrusions, elastic deformation will occur when subjected to radial pressure. This elastic deformation allows the elastic protrusions to adapt to the small shape deviations and size changes of the inner wall of the mold cavity, achieving good fit. On the other hand, the elastic protrusions apply a continuous radial support force to the inner wall of the mold cavity under elastic deformation, thus reducing the adhesion and frictional resistance of the conical spring sheet. The structure is stably fixed in a predetermined position. Since only the outer end face of the elastic protrusion contacts the inner wall of the mold cavity, while the remaining outer surface of the conical body maintains a gap with the inner wall of the mold cavity, the actual contact area between the conical spring structure and the inner wall of the mold cavity is greatly reduced. According to the principle of tribology, both friction and adhesion are proportional to the contact area. The reduction in contact area directly leads to a significant reduction in friction and adhesion. In addition, the elasticity of the elastic protrusion can also provide a certain rebound force during demolding, assisting the product to be ejected from the mold. Through this ingenious structural design, this utility model can effectively solve the demolding adhesion problem of the conical spring without the use of any release agent or lubricant, relying solely on the characteristics of the structure itself. At the same time, it ensures the stable positioning of the conical spring in the mold cavity, achieving an organic unity of anti-sticking performance and support performance.

Claims

1. A cone-shaped spring sheet structure for demolding and anti-sticking, characterized in that, The device includes a conical body and an anti-sticking structure disposed on the conical body. The conical body is a hollow frustum shape, with the large end face of the conical body being an open end and the small end face being a closed end. The anti-sticking structure includes multiple elastic protrusions, which are evenly distributed along the circumference of the conical body on its outer surface. The elastic protrusions extend outward from the outer surface of the conical body. When the conical spring structure is installed on the inner wall of the mold cavity, the outer end face of the elastic protrusion abuts against the inner wall of the mold cavity and generates elastic deformation. Under the elastic deformation state, the elastic protrusion applies a radial supporting force to the inner wall of the mold cavity.

2. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 1, characterized in that, The length of the elastic protrusion along the axial direction of the conical body is greater than the width of the elastic protrusion along the circumferential direction of the conical body.

3. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 2, characterized in that, The edge of the open end of the conical body extends outward to form a flange structure, which is in the shape of an annular plate, and the extension direction of the flange structure is perpendicular to the axis of the conical body.

4. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 3, characterized in that, The cross-sectional shape of the elastic protrusion is trapezoidal or triangular.

5. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 4, characterized in that, The number of elastic protrusions is 6 to 12, and the interval between two adjacent elastic protrusions is equal.

6. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 5, characterized in that, The outer end face of the elastic protrusion is an arc-shaped surface, and the radius of curvature of the arc-shaped surface is adapted to the radius of curvature of the inner wall of the mold cavity.

7. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 6, characterized in that, The wall thickness of the conical body gradually decreases from the open end to the closed end along the axial direction, and the wall thickness of the conical body at the open end is greater than the wall thickness of the conical body at the closed end.

8. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 7, characterized in that, The conical body is made of elastic metal material or elastic polymer material.

9. The cone-shaped spring sheet structure for demolding and anti-sticking according to claim 8, characterized in that, The elastic protrusion and the conical body are integrally formed.

10. A cone-shaped spring sheet structure for demolding and anti-sticking according to claim 9, characterized in that, The ratio of the outer diameter of the flange structure to the inner diameter of the opening end of the conical body is 1.2 to 1.8, and the ratio of the height of the elastic protrusion extending outward from the outer surface of the conical body to the wall thickness of the conical body is 0.5 to 2.0.

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