Silica gel mold with automatic mold stripping function

Abstract

The invention discloses an automatic demolding silica gel mold which comprises a first panel, a second panel and a third panel, and a first mold core is arranged on the first panel; the second panel is fixed with the first panel, the second panel is connected with an ejector rod of the injection molding machine, a second mold core is connected to the second panel in a sliding manner, and the second mold core is suitable for forming optical teeth on the surface of the initial product; a third mold core is fixed on the third panel and is suitable for forming an overflow bag on the surface of the initial product; the first panel and the third panel are located on the two sides of the second panel. A telescopic rod is connected between the second mold core and the third mold core; when the ejector rod is in an ejection state, the telescopic rod drives the second mold core to leave the initial product, and when the ejector rod is in a retraction state, the telescopic rod retracts, and the second mold core and the third mold core are pressed into the initial product. The problems that an initial product is difficult to take and complex to take are solved, the stress of the product during mold stripping is uniform, and the deformation of the product is small.

Description

Technical Field

[0001] The invention relates to the technical field of automobile or mold manufacturing, and in particular to an automatic demoulding silicone mold. Background Art

[0002] For silicone products with tooth shape, such as Figure 1 As shown, the product includes a hard rubber body 903, optical teeth 901 and an overflow bag 902, wherein the optical teeth 901 and the overflow bag 902 are formed by placing the hard rubber body 903 in a customized mold, and the existing silicone mold includes two mold cores, the first mold core is used to form the optical teeth 901, and the second mold core is used to form the overflow bag 902, the hard rubber body is fixed on the first mold core, and the second mold core can move relative to the first mold core under the action of the press, so when demolding, the first mold core cannot automatically demold the product, and since the silicone material is easy to deform, if the ejector pin in the conventional mold directly pushes against the surface of the product, it will cause deformation of the product, so the existing technology often uses a robot or manual to pull out the product from the outside, but the number of silicone optical teeth is large, and they are tightly adhered to the mold core, and it is very difficult to use external force to pull out the product, and there is a problem of uneven force points. For this reason, it is necessary to design a silicone mold that can avoid initial product deformation and reduce the difficulty of demolding. Summary of the invention

[0003] In order to solve the technical problem in the prior art that the initial product needs to be pulled out from the outside manually or with the assistance of a robot when demolding, resulting in difficulty in demolding and uneven force on the product, the present invention provides a silicone mold with automatic demolding to solve the above problem.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an automatic demoulding silicone mold, comprising a first panel, a second panel and a third panel, the first panel is provided with a first mold core for fixing an initial product; the second panel is fixed to one end of the first panel, the second panel is connected to an ejector rod of an injection molding machine, the second panel is slidably connected with a second mold core, and the second mold core slides in a direction parallel to the ejector rod, the second mold core is suitable for forming optical teeth on the surface of the initial product; the third panel is fixed with a third mold core, the third mold core is suitable for forming an overflow bag on the surface of the initial product; the first panel and the third panel are located on both sides of the second panel, and the ejector rod passes through the third panel and is connected to the injection molding machine.

[0005] A telescopic rod is connected between the second mold core and the third mold core; when the ejector rod is in the ejecting state, the telescopic rod drives the second mold core to leave the initial product, and when the ejector rod is in the retracted state, the telescopic rod retracts, and the second mold core and the third mold core are both pressed into the initial product.

[0006] Furthermore, the telescopic rod includes a sliding rod and a sleeve, the sleeve is connected to the third mold core, one end of the sliding rod is fixed to the second mold core, and the other end of the sliding rod extends into the sleeve.

[0007] Furthermore, a guide column is fixed on the third panel, and the guide column is slidably connected to the first panel and the second panel.

[0008] Furthermore, the third panel is hollow inside, one end of the sleeve passes through the third mold core and extends into the third panel, and the end of the sleeve extending into the third panel has a limiting boss.

[0009] Furthermore, the surface of the second panel facing the first panel has a mold core installation groove, which is a rectangular groove that matches the outer shape of the second mold core and has a lower limit surface parallel to the surface of the second panel. When the second mold core contacts the lower limit surface, the distance between the second mold core and the first mold core is the farthest.

[0010] Furthermore, the surface of the second panel located at the outer periphery of the mold core mounting groove has a mounting hole fixed to the first mold core, and the end surface of the first mold core facing the second mold core forms an upper limit surface for the linear motion of the second mold core.

[0011] Furthermore, the surface of the initial product has a limiting column protruding in the same direction as the optical teeth, and the first mold core has a limiting hole for the limiting column to be inserted.

[0012] Furthermore, the center of the first mold core has a working hole for the second mold core to pass through, and the working hole has two opposite and inclined lateral contact surfaces, which cooperate with the second mold core, and the two lateral contact surfaces are inclined surfaces that gradually approach each other from one end close to the second panel to one end away from the second panel.

[0013] Furthermore, one or more first mold cores are provided on the first panel, and the number of the first mold cores, the second mold cores and the third mold cores is equal.

[0014] Furthermore, a mold core area is provided in the center of the first panel, the second panel and the third panel, and the first mold core, the second mold core and the third mold core are all located in the mold core area of ​​the corresponding panel. A sealing groove is provided on the periphery of the mold core area, and a sealing ring is provided in the sealing groove.

[0015] Furthermore, a limit groove matching the outer shape of the third mold core is provided on the surface of the second panel facing the third panel, and a mold core limit surface facing the third panel is provided in the limit groove, and the side edges of the mold core limit surface and the lower limit surface are perpendicular to each other, and the distance from the mold core limit surface to the first panel is smaller than the distance from the lower limit surface to the first panel.

[0016] The beneficial effects of the present invention are: (1) The automatic demoulding silicone mold of the present invention solves the problem of difficulty and complexity in removing the initial product. The product is evenly stressed when ejected from the mold, and the product deformation is small.

[0017] (2) The present invention significantly reduces the injection molding cycle, thereby increasing production efficiency by more than 35%; the more mold core groups there are, the higher the production efficiency.

[0018] (3) The present invention adds a second panel located in the middle and reasonably adjusts the movement relationship of the three panels so that the three mold cores can be automatically pressed or disengaged with the movement of the press, thereby reducing the difficulty of demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional picture of silicone products; Figure 2 It is a schematic diagram of the connection between the automatic demoulding silicone mold and the ejector plate of the injection molded part according to the present invention; Figure 3 It is an exploded view of a specific embodiment of the automatic demoulding silicone mold of the present invention; Figure 4 It is a schematic diagram of the automatic demoulding silicone mold of the present invention when it is in a demoulding state; Figure 5 It is a schematic diagram of the automatic demoulding silicone mold of the present invention when it is in a compression molding state; Figure 6 It is a cross-sectional view of the automatic demoulding silicone mold of the present invention when it is in a demoulding state; Figure 7 It is a cross-sectional view of the automatic demoulding silicone mold of the present invention when it is in a compression molding state; Figure 8 yes Figure 3 The enlarged image at a in the middle; Fig. 9 yes Figure 5 The enlarged image at point b in the middle; Fig.10 yes Figure 7 Enlarged image at point d in the middle; Fig.11 is a three-dimensional diagram of the second mold core of the present invention; Fig.12 is a three-dimensional diagram of the second panel of the present invention; Fig.13 It is a front view of the second panel and the second mold core after being assembled in the present invention; Fig.14 yes Fig.13 AA section view; Fig.15 yes Fig.13 BB section view; Fig.16 It is a schematic diagram of assembling the telescopic rod and the third mold core in the present invention.

[0021] In the figure, 1, the first panel, 2, the second panel, 201, the mounting hole, 3, the third panel, 4, the first mold core, 401, the working hole, 402, the lateral contact surface, 5, the second mold core, 501, the first base, 502, the first molding part, 6, the third mold core, 601, the second base, 602, the second molding part, 7, the ejector plate, 8, the ejector rod, 9, the silicone product, 901, the optical tooth, 902, the overflow bag, 903, the hard rubber body, 10, the sliding rod, 1001, the limit block, 11, the sleeve, 1101, the limit boss, 12, the mold core mounting groove, 1201, the lower limit surface, 13, the upper limit surface, 14, the mold core area, 15, the sealing groove, 16, the guide column, 17, the limit column, 18, the limit hole, 19, the mold core limit surface, 20, the limit groove. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] like Figure 2-Figure 7 As shown, a silicone mold for automatic demoulding includes a first panel 1, a second panel 2 and a third panel 3. The first panel 1 is provided with a first mold core 4 for fixing the initial product; the second panel 2 is fixed to one end of the first panel 1, the second panel 2 is connected to the ejector rod 8 of the injection molding machine, the second panel 2 is slidably connected with a second mold core 5, and the second mold core 5 slides in a direction parallel to the ejector rod 8, and the second mold core 5 is suitable for forming optical teeth 901 on the surface of the initial product; the third panel 3 is fixed with a third mold core 6, and the third mold core 6 is suitable for forming an overflow bag 902 on the surface of the initial product; the first panel 1 and the third panel 3 are located on both sides of the second panel 2, and the ejector rod 8 passes through the third panel 3 and is connected to the injection molding machine. A telescopic rod is connected between the second mold core 5 and the third mold core 6; when the ejector rod 8 is in the ejection state, the telescopic rod drives the second mold core 5 to leave the initial product, and when the ejector rod 8 is in the retracted state, the telescopic rod retracts, and the second mold core 5 and the third mold core 6 are both pressed into the initial product.

[0024] In the present invention, the initial product refers to the product before the optical teeth 901 and the overflow bag 902 are injection molded, that is, the hard plastic body mentioned in the background technology.

[0025] The first mold core 4 is used to fix the initial product and to limit the partial movement of the second mold core 5. The second mold core 5 is used to form the optical tooth 901, and the third mold core 6 is used to form the overflow bag 902. The function of the ejector rod 8 is to drive the first mold core 4 and the second mold core 5 to approach or move away from the third panel 3 through the first panel 1 and the second panel 2. The function of the sliding cooperation between the second mold core 5 and the second panel 2 is to make the first mold core 4 and the second mold core 5 have a smaller relative movement. When the second mold core 5 moves to the extreme position of the sliding cooperation, the telescopic rod can perform telescopic movement, thereby changing the position between the first mold core 4 and the second mold core 5, realizing the separation or closing of the two mold cores, so that the second mold core 5 can be automatically separated from the product, and the second mold core 5 can be synchronously evacuated from the silicone product 9 as a whole, solving the problem of uneven force caused by traditional manipulator clamping.

[0026] like Figure 4 and Figure 6 As shown, at this time, the mold is in a demoulding state, the first mold core 4, the second mold core 5 and the third mold core 6 are separated in sequence, the ejector rod 8 and the telescopic rod are both in an extended state, when film pressing is required, the injection molding machine drives the ejector rod 8 to retract, and the telescopic rod gradually retracts during the movement. When the telescopic rod is completely retracted, the ejector rod 8 continues to retract, and the telescopic rod drives the second mold core 5 to gradually move toward the first mold core 4 until the second panel 2 and the third panel 3 are fitted together. At this time, the three mold cores are interlocked (as shown in FIG. Figure 7 as shown).

[0027] like Figure 2 As shown, the ejector rod 8 is connected to the ejector plate 7 of the injection molding machine. The forward and backward movement of the ejector plate 7 is controlled by the motor of the injection molding machine. The injection molding machine can realize the forward and backward multi-position, multi-pressure, and multi-speed controlled movement of the ejector plate 7. Due to the connection of the ejector rod 8, the multi-position movement of the second panel 2 and the first panel 1 is realized.

[0028] The telescopic rod is a rod that can be extended and retracted under the action of external force, and generally includes a slide rod 10 and a sleeve 11. The sleeve 11 is connected to the third mold core 6. One end of the slide rod 10 is fixed to the second mold core 5, and the other end of the slide rod 10 extends into the sleeve 11. Fig.10 and Fig.16 As shown, the left end of the slide rod 10 is threadedly connected to the third mold core 6, and the right end of the slide rod 10 has a limit block 1001. During the extension and retraction process of the telescopic rod, the limit block 1001 is always located in the sleeve 11. When the telescopic rod is fully extended, the limit block 1001 can be against the inner surface of the left end of the sleeve 11.

[0029] In order to avoid gaps between the panels during compression molding, air may enter the mold, causing air to enter the product and affecting product quality. Therefore, as a preferred embodiment, in the compression molding state, the first panel 1, the second panel 2 and the third panel 3 are sequentially fitted. Since the second panel 2 and the third panel 3 need to fit together, the telescopic rod needs to be hidden inside the panel, such as Figure 7 and Fig.16 As shown, the third panel 3 is hollow inside, one end of the sleeve 11 passes through the third mold core 6 and extends into the third panel 3, and the end of the sleeve 11 extending into the third panel 3 has a limiting boss 1101. The function of the limiting boss 1101 is similar to that of the limiting block 1001. The limiting boss 1101 is always located inside the third panel 3 to prevent the sleeve 11 from detaching from the third mold core 6.

[0030] During the retraction of the telescopic rod, when the end of the sleeve 11 abuts against the second mold core 5, the sleeve 11 pushes the second mold core 5 toward the first mold core 4, and at the same time the sleeve 11 is pushed toward the inside of the third panel 3 until the mold is closed. At this time, the sliding rod 10 is located in the sleeve 11, a part of the sleeve 11 is located in the third mold core 6, and the other part is located in the third panel 3, thereby hiding the telescopic rod.

[0031] In order to further improve the airtightness inside the mold core, in the further design, such as Figure 3 and Fig.12 As shown, a mold core area 14 is provided at the center of the first panel 1, the second panel 2 and the third panel 3, and the first mold core 4, the second mold core 5 and the third mold core 6 are all located in the mold core area 14 of the corresponding panel. A sealing groove 15 is provided on the periphery of the mold core area 14, and a sealing ring is provided in the sealing groove 15 to prevent vacuum from being unable to be drawn between the panels and between the mold cores.

[0032] For the positioning of the mold core, the focus is placed on the second panel 2. The second panel 2 is used for the movement positioning of the moving parts, namely, the second mold core 5. It also serves as a limit for the third mold core 6 and a position positioning for the first mold core 4. That is, the first mold core 4 and the third mold core 6 are both assembled on the basis of the second panel 2.

[0033] First, the positioning structure of the second mold core 5: Fig.12 As shown, the surface of the second panel 2 facing the first panel 1 has a mold core installation groove 12, which is a rectangular groove that matches the outer shape of the second mold core 5 and has a lower limit surface 1201 parallel to the surface of the second panel 2. When the second mold core 5 contacts the lower limit surface 1201, the distance between the second mold core 5 and the first mold core 4 is the farthest. The structure of the second mold core 5 is as shown in FIG. Fig.11As shown, the second mold core 5 has a first base 501 and a first molding portion 502 located at the top of the first base 501. The first base 501 is used for movement positioning and cooperates with the rectangular groove. Therefore, the outer peripheral surface of the first base 501 is a rectangular surface, which can move linearly along the rectangular groove. The first molding portion 502 can extend out of the first mold core 4 to form optical teeth 901 on the initial product. The lower limit surface 1201 is used to limit the limit of the second mold core 5 to exit during demolding, preventing the second mold core 5 from separating from the second panel 2. The limit of the second mold core 5 moving toward the first mold core 4 is the surface of the first mold core 4.

[0034] The structure of the third mold core 6 is as follows Figure 4 As shown, it includes a second base 601 and a second molding portion 602. The second base 601 is used as a movement guide and is fixed on the third panel 3. The second molding portion 602 is used to mold an overflow bag 902. During the molding, the second molding portion 602 of the third mold core 6 extends into the second mold core 5. The third mold core 6 and the second mold core 5 are also preferably matched with inclined surfaces.

[0035] In order to enable the second mold core 5 and the third mold core 6 to be in contact by extrusion, the lower limit surface 1201 cannot seal the end of the rectangular groove, that is, the lower limit surface 1201 only connects part of the side of the rectangular groove. In a preferred embodiment, two lower limit surfaces 1201 are symmetrically arranged, respectively connecting two opposite sides of the rectangular groove, such as Fig.12 and Fig.14 As shown, the lower limit surface 1201 connects the left and right sides of the mold core mounting groove 12, and the left and right dimensions of the third mold core 6 are smaller than the distance between the two lower limit surfaces 1201, so that the third mold core 6 can pass through the lower limit surface 1201 to extrude the second mold core 5. In a preferred embodiment, a limiting groove 20 that matches the outer shape of the third mold core 6 can be set on the surface of the second panel 2 facing the third panel 3, specifically matching the outer shape of the second base 601. The limiting groove 20 has a mold core limiting surface 19 facing the third panel 3. The mold core limiting surface 19 is used to limit the maximum distance of the third mold core 6 pushing toward the second mold core 5. Like the lower limiting surface 1201, the mold core limiting surface 19 is also located at the edge of the limiting groove 20, but the mold core limiting surface 19 and the lower limiting surface 1201 are located on adjacent sides. Assuming that the mold core limiting surface 19 is arranged on both sides in the width direction, the lower limiting surface 1201 is arranged on both sides in the length direction, and in the thickness direction, the mold core limiting surface 19 is arranged closer to the first panel 1, that is, the third mold core 6 passes through the lower limiting surface 1201 and then squeezes the second mold core 5, and finally abuts against the mold core limiting surface 19 (such as Fig.10 As shown in Fig.15 As shown, the mold core limiting surface 19 can be seen on this cross section, and the height of the limiting groove 20 on this cross section is greater than the height of the mold core mounting groove 12. Fig.14As shown, a lower limit surface 1201 can be seen on the cross section, and the height of the limit groove 20 on the cross section is less than the height of the mold core mounting groove 12.

[0036] The difference between the present invention and the conventional mold is that one of the mold cores is a first mold core 4 and a second mold core 5 that can move relative to each other, and the optical tooth 901 is formed by the second mold core 5, and the first mold core 4 fixes the initial product. The structure of the first mold core 4 is as follows: Figure 8 As shown, the center of the first mold core 4 has a working hole 401 for the second mold core 5 to pass through, and the working hole 401 has two opposite and inclined lateral contact surfaces 402, which cooperate with the second mold core 5, and the two lateral contact surfaces 402 are inclined surfaces that gradually approach from one end close to the second panel 2 to the end away from the second panel 2. The part of the second mold core 5 inserted into the working hole 401 is the first molding part 502, and the inclined lateral contact surface 402 can provide guidance for the movement of the second mold core 5, and also make the two mold cores fit more tightly, thereby improving air tightness.

[0037] The first mold core 4 is fixed to the second panel 2. Fig.10 and Fig.13 As shown, the surface of the second panel 2 located at the periphery of the mold core mounting groove 12 has a mounting hole 201 fixed to the first mold core 4, and the end surface of the first mold core 4 facing the second mold core 5 forms an upper limit surface 13 for the linear motion of the second mold core 5. Placing the mounting hole 201 on the second panel 2 can make the positioning of the first mold core 4 more accurate.

[0038] In order to ensure the linear motion of the first panel 1 and the second panel 2 and reduce the bending torque on the ejector rod 8, preferably, a guide post 16 is fixed on the third panel 3, and the guide post 16 is slidably connected with the first panel 1 and the second panel 2. Figure 5 As shown, guide posts 16 are arranged around the third panel 3 .

[0039] In the present invention, during the ejection process of the ejector rod 8, the second mold core 5 is limited by the structure of the telescopic rod and the mold, so that the second mold core 5 and the third mold core 6 can be ejected from the mold at the same time, and there is no need to use a robot to assist in ejecting the mold, thereby greatly improving the production efficiency. Compared with traditional molds, the production efficiency can be increased by more than 35%.

[0040] One or more first mold cores 4 can be provided on the first panel 1. The number of first mold cores 4, second mold cores 5 and third mold cores 6 is equal. One first mold core 4, one second mold core 5 and one third mold core 6 constitute a mold core group to complete the injection molding of a silicone product 9. Arranging multiple mold core groups at the same time can realize the simultaneous injection molding of multiple silicone products 9. Therefore, the more mold core groups there are, the higher the production efficiency.

[0041] In a further design, in order to ensure accurate fixation of the initial product, the initial product surface has a limiting column 17 protruding in the same direction as the optical tooth 901, and the first mold core 4 has a limiting hole 18 (such as Fig. 9 As shown in FIG. 1 ), when installing the initial product, first insert the limiting column 17 into the limiting hole 18 to preliminarily position the initial product, and then fix the initial product to the first mold core 4. After the initial product is injection molded into the silicone product 9, the limiting column 17 still exists (as shown in FIG. 1 ). Figure 1 as shown).

[0042] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0044] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0045] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A silicone mold with automatic demoulding, characterized in that: include: A first panel (1), the first panel (1) being provided with a first mold core (4) for fixing an initial product; A second panel (2) is fixed to one end of the first panel (1), the second panel (2) is connected to an ejector rod (8) of an injection molding machine, a second mold core (5) is slidably connected to the second panel (2), and the second mold core (5) slides in a direction parallel to the ejector rod (8), and the second mold core (5) is suitable for forming optical teeth (901) on the surface of the initial product; a third panel (3), on which a third mold core (6) is fixed, the third mold core (6) being suitable for forming an overflow bag (902) on the surface of the initial product; the first panel (1) and the third panel (3) are located on both sides of the second panel (2), and the ejector rod (8) passes through the third panel (3) and is connected to the injection molding machine; A telescopic rod is connected between the second mold core (5) and the third mold core (6); when the ejection rod (8) is in an ejection state, the telescopic rod drives the second mold core (5) away from the initial product; when the ejection rod (8) is in a retracted state, the telescopic rod retracts, and the second mold core (5) and the third mold core (6) are both pressed into the initial product.

2. The automatic demoulding silicone mold according to claim 1, characterized in that: The telescopic rod comprises a sliding rod (10) and a sleeve (11), wherein the sleeve (11) is connected to the third mold core (6), one end of the sliding rod (10) is fixed to the second mold core (5), and the other end of the sliding rod (10) extends into the sleeve (11).

3. The automatic demoulding silicone mold according to claim 1, characterized in that: A guide column (16) is fixed on the third panel (3), and the guide column (16) is slidably connected to the first panel (1) and the second panel (2).

4. The automatic demoulding silicone mold according to claim 2, characterized in that: The third panel (3) is hollow inside, one end of the sleeve (11) passes through the third mold core (6) and extends into the third panel (3), and the end of the sleeve (11) extending into the third panel (3) has a limiting shoulder (1101).

5. The automatic demoulding silicone mold according to claim 1, characterized in that: The surface of the second panel (2) facing the first panel (1) is provided with a mold core installation groove (12), the mold core installation groove (12) being a rectangular groove matching the outer shape of the second mold core (5) and having a lower limit surface (1201) parallel to the surface of the second panel (2), and when the second mold core (5) is in contact with the lower limit surface (1201), the distance between the second mold core (5) and the first mold core (4) is the farthest.

6. The automatic demoulding silicone mold according to claim 5, characterized in that: The surface of the second panel (2) located at the periphery of the mold core mounting groove (12) has a mounting hole (201) fixed to the first mold core (4), and the end surface of the first mold core (4) facing the second mold core (5) forms an upper limit surface (13) for the linear movement of the second mold core (5).

7. The automatic demoulding silicone mold according to claim 1, characterized in that: The surface of the initial product has a limiting column (17) protruding in the same direction as the optical teeth (901), and the first mold core (4) has a limiting hole (18) for the limiting column (17) to be inserted.

8. The automatic demoulding silicone mold according to claim 1, characterized in that: The center of the first mold core (4) has a working hole (401) for the second mold core (5) to pass through, and the working hole (401) has two opposite and inclined lateral contact surfaces (402), the lateral contact surfaces (402) cooperate with the second mold core (5), and the two lateral contact surfaces (402) are inclined surfaces that gradually approach each other from one end close to the second panel (2) to one end away from the second panel (2).

9. The automatic demoulding silicone mold according to claim 5, characterized in that: A limiting groove (20) matching the outer shape of the third mold core (6) is arranged on the surface of the second panel (2) facing the third panel (3); a mold core limiting surface (19) facing the third panel (3) is provided in the limiting groove (20); the side edges of the mold core limiting surface (19) and the lower limiting surface (1201) are perpendicular to each other; and the distance from the mold core limiting surface (19) to the first panel (1) is smaller than the distance from the lower limiting surface (1201) to the first panel (1).

10. The automatic demoulding silicone mold according to claim 1, characterized in that: A mold core area (14) is provided at the center of the first panel (1), the second panel (2) and the third panel (3); the first mold core (4), the second mold core (5) and the third mold core (6) are all located in the mold core area (14) of the corresponding panel; a sealing groove (15) is provided on the outer periphery of the mold core area (14); and a sealing ring is provided in the sealing groove (15).

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