A production mold for a silicone mask

Abstract

The present invention provides a production mold for silicone masks, belonging to the field of mechanical technology. It solves the problem of existing molds that easily tear the molded silicone masks during demolding. The production mold for silicone masks includes an upper mold base and a lower mold base. The upper mold base can move up and down relative to the lower mold base. The lower mold base is provided with a lower mold core. The upper mold base is slidably connected to the upper mold core via a connector. The upper mold core and the lower mold core are arranged relative to each other and can be snapped onto the lower mold core. An elastic member is provided between the upper mold core and the upper mold base to cause the upper mold core to move toward the lower mold core. When the mold is closed, a cavity is formed between the upper mold base, the lower mold base, the upper mold core, and the lower mold core, and the elastic member is compressed. During the mold opening process, the upper mold base moves first and the upper mold core moves later under the cooperation of the elastic member and the connector, thereby achieving the step-by-step pulling and separation of the silicone mask from the upper mold base and the upper mold core. Compared with existing molds, it is not easy to be torn, ensuring the product qualification rate.

Description

Technical Field

[0001] The invention belongs to the technical field of machinery and relates to a production mold for a silicone mask. Background Art

[0002] Because silicone material has good sealing properties, it can seal most harmful gases, can withstand harsh high temperature and high pressure environments, will not age and harden, is easy to clean, is very durable, does not deform, and can still ensure good fit after repeated use. Therefore, silicone masks are often used as a tool for self-protection when working in harsh environments. They are used in factory dust prevention, anti-poisoning, firefighting and military fields. They are the main accessories for gas masks, dust masks, fire masks, and diving masks. Figure 12 As shown, the existing silicone mask 15 generally includes a silicone material that is injection-molded by a mold. The middle portion of the silicone mask 15 has a visual window 15a for mounting a lens.

[0003] For example, a Chinese patent application (application number: 201220430772.5) discloses a solid silicone breathing mask mold, comprising an upper mold base, an upper cavity template, a mold core, a lower cavity template, a core screw, a fixing pin, and a lower mold base; wherein the upper mold base, the upper cavity template, the lower cavity template, and the lower mold base are arranged in sequence from top to bottom; the mold core is arranged between the upper cavity template and the lower cavity template, and a product cavity is formed between the three; the core screw is arranged at the bottom of the mold core; and the fixing pin and the core screw cooperate. During injection molding, the upper cavity template moves downward to close the mold with the lower cavity template, and a product cavity is formed between the mold core and the upper and lower cavity templates. Liquid silicone is injected into the product cavity through the injection hole. After molding, the upper cavity template moves upward to open the mold, and then the mold core moves upward to eject the molded silicone mask to complete demolding.

[0004] The above-mentioned mold has the following defects during use: due to the characteristics of the material, the silicone mask is easily adhered to the mold core and the upper template of the cavity after molding. Therefore, in the process of removing the mold from the upper template of the control cavity, the sudden force applied can easily cause the silicone mask to be pulled and torn, thus becoming waste and affecting the product qualification rate.

[0005] In order to solve the problem that the silicone mask is easily torn when the mold is opened, the existing conventional practice is to open a number of air holes on the upper template of the cavity, connect the air holes to the air source, and blow air through the air holes to make the silicone mask separate from the upper template of the cavity. However, the setting of the air holes makes it easy for liquid silicone to enter the air holes during the injection molding process, causing the air holes to be blocked, and also forming residual material on the silicone mask. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a production mold for a silicone mask. The technical problem to be solved by the present invention is: how to solve the problem that the molded silicone mask is easily torn during demoulding of the existing mold.

[0007] The objectives of the present invention can be achieved through the following technical solutions: A production mold for a silicone mask, comprising an upper mold base and a lower mold base, the upper mold base being able to move up and down relative to the lower mold base, a lower mold core being provided in the lower mold base, and characterized in that an upper mold core is provided in the upper mold base, the upper mold core being slidably connected to the upper mold base through a connecting piece, the upper mold core and the lower mold core being arranged relative to each other and being able to be buckled on the lower mold core, an elastic piece being provided between the upper mold core and the upper mold base so that the upper mold core has a tendency to move toward the lower mold core, and when the upper mold base moves down and closes the mold with the lower mold base, a cavity is formed between the upper mold base, the lower mold base, the upper mold core and the lower mold core, and the elastic piece is compressed.

[0008] When this production mold is closed, a cavity is formed between the upper mold base, lower mold base, upper mold core, and lower mold core. Liquid silicone is injected into the cavity to form the silicone mask. Because the upper mold base includes an upper mold core positioned opposite the lower mold core, after molding, the silicone mask portion is located between the upper and lower mold cores. During the mold opening process, as the upper mold base initially moves upward, the elastic compressive force of the elastic member holds the upper mold core stationary and securely against the lower mold core. The silicone mask portion is pressed against the upper mold core, causing the upper mold base and upper mold core to move relative to each other. The portion of the silicone mask adhered to the upper mold base is first pulled away from the upper mold base. The upper mold base continues to move upward, the elastic member resets, and the upper mold core moves upward with the upper mold base under the action of the connecting member. The silicone mask is separated from the upper mold core, completing the mold opening. That is to say, during the mold opening process, with the cooperation of the elastic parts and the connecting parts, the upper mold base moves first and the upper mold core moves later, thereby realizing the silicone mask being slowly pulled and separated from the upper mold base and the upper mold core in steps. Compared with the existing direct mold opening and pulling, it is not easy to be torn, thus ensuring the product qualification rate.

[0009] In the production mold for the above-mentioned silicone mask, a core groove 1 that matches the upper mold core is provided on the upper mold base, and the above-mentioned elastic member is arranged between the upper mold core and the bottom wall of the core groove 1. When the upper mold base moves down and closes the mold with the lower mold base, the upper mold core compresses the elastic member and embeds it into the core groove 1 and can cover the notch of the core groove 1. When closing the mold, the upper mold core compresses the elastic member and embeds it into the core groove. The surface of the upper mold core and the inner surface of the upper mold base can form a continuous molding surface, thereby cooperating with the lower mold base and the lower mold core to form the above-mentioned molding cavity. When opening the mold, under the influence of the elastic force of the elastic member, when the upper mold base just starts to move up, the upper mold core extends out of the core groove 1, so that the small part of the silicone mask adhering to the upper mold base is first pulled and separated from the upper mold base.

[0010] In the above-mentioned production mold of the silicone mask, the connecting part is rod-shaped and one end is fixed on the upper mold base. The upper mold core has a contact area 1 that can fit with the lower mold core. A guide hole is correspondingly opened on the contact area 1. The guide hole is a step hole. The free end of the connecting part extends into the guide hole and a limiting boss protrudes circumferentially from the end. The elastic part is a spring. The spring is sleeved on the connecting part and the two ends of the spring respectively rest on the bottom wall of the core groove 1 and the upper mold core, and under the action of the elastic force of the spring, the limiting boss can rest on the step surface of the guide hole. Several connectors are fixed to the upper mold base. These connectors serve both as connectors connecting the upper mold core and the upper mold base, and as guides, ensuring stable and smooth relative movement between the upper mold core and the upper mold base without jamming. At the same time, the limiting bosses of the connectors limit the sliding travel between the upper mold core and the upper mold base. Combined with the elastic components, this allows the upper mold base to move first, followed by the upper mold core, during mold opening. This gradually pulls the silicone mask apart from the upper mold base and upper mold core, preventing tearing and ensuring a high product yield. Abutment Area 1 corresponds to the visual window for the silicone mask, and a guide hole is provided in Abutment Area 1. When the mold is closed, Abutment Area 1 aligns with the lower mold core, preventing liquid silicone from entering the guide hole.

[0011] In the aforementioned silicone mask production mold, the notch of core groove one has an annular abutment step, and the upper mold core has an annular abutment flange. When the upper mold base moves downward to close the mold with the lower mold base, the upper mold core compresses the elastic member embedded in core groove one, and the abutment flange rests on the abutment step. The combination of the abutment step and the abutment flange can limit the travel of the upper mold core, ensuring that the upper mold core surface and the inner surface of the upper mold base form a continuous molding surface when the mold is closed. At the same time, it also limits the compression range of the elastic member, preventing excessive compression of the elastic member and ensuring the product quality rate.

[0012] In the production mold of the above-mentioned silicone mask, the lower mold core has a contact area 2, and the contact area 2 is provided with a blind hole opposite to the guide hole. When the upper mold base moves down and closes the mold with the lower mold base, the connecting part can extend into the corresponding blind hole, and the contact area 1 and the contact area 2 fit together. The setting of the blind hole achieves an avoidance, so that when the mold is closed, the connecting part can extend into the blind hole to avoid interference, so that the upper mold core and the lower mold core can remain in contact. Contact area 1 and contact area 2 correspond to the visual windows of the silicone mask. Therefore, when the mold is closed, contact area 1 and contact area 2 fit together to maintain a seal, and liquid silicone will not enter the guide hole and the blind hole.

[0013] In the aforementioned silicone mask production mold, the lower mold base comprises a base, a left mold half, and a right mold half. The lower mold core is mounted on the base. The left and right mold halves are slidably connected to the base and positioned on either side of the lower mold core. When the left and right mold halves are closed, they form a mold hole surrounding the lower mold core. The gap between the mold hole wall and the lower mold core constitutes part of the product cavity. This gap between the mold hole wall and the lower mold core forms part of the product cavity. When the mold is opened, the molded silicone mask portion is pressed between the left mold half and the lower mold core, and between the right mold half and the lower mold core. This allows the silicone mask to remain attached to the lower mold core during upward movement of the upper mold core, allowing it to be pulled away from the upper mold core. The left and right mold halves can then slide relative to the base, enabling side-pull demolding. This further ensures the silicone mask is gradually released, preventing tearing during demolding and ensuring a high product quality rate.

[0014] In the mold for producing the silicone mask, the upper mold base further includes a limit groove. The core groove is formed at the bottom of the limit groove. The side walls of the limit groove are inclined outward. When the upper mold base is lowered and closed with the lower mold base, the left and right mold halves are both inserted into the limit groove and respectively abut against the side walls of the limit groove. The side walls of the limit groove are inclined. When the mold is closed, after the left and right mold halves are inserted into the limit groove, the inclined surfaces guide the left and right mold halves inward, thereby ensuring the mold closing effect.

[0015] In the aforementioned silicone mask production mold, the base is provided with slide rails extending in a left-right direction, and the left and right mold halves are each provided with a slide groove. The slide rails extend through corresponding slide grooves, and the left and right mold halves can slide along the slide rails. The cooperation between the slide rails and the slide grooves enables the left and right mold halves to slide left and right on the base to achieve mold closing and demolding. The left and right mold halves can be driven individually by a driving member to achieve sliding.

[0016] In the above-mentioned production mold of the silicone mask, the lower mold base also includes a mold base slidably connected to the base, the mold base is located on the rear side of the lower mold core and can move closer to or away from the lower mold core by sliding, the left half mold and the right half mold are respectively provided with a left half groove and a right half groove, and the upper surface of the mold base is provided with a molding groove 1. After the mold is closed, the left half groove and the right half groove are buckled on the mold base, and the gaps between the mold base and the lower mold core, between the molding groove 1 of the mold base and the groove wall of the left half groove, and between the molding groove 1 of the mold base and the groove wall of the right half groove all constitute part of the above-mentioned product cavity. The base also features a core seat, the outer wall of which is defined by several grooves (II). Grooves (I) and (II) are used to form the connecting piece for the silicone mask. The resulting silicone mask is compressed between the mold base and the lower mold core, as well as between the mold base's groove (I) and the walls of the left and right half grooves. This ensures that the silicone mask remains attached to the lower mold core as the upper mold core moves upward, allowing it to be pulled away from the upper mold core. The mold base can then move back and forth relative to the base to release it from the mold core, further enabling the gradual release of the silicone mask, preventing the product from tearing during the demolding process and ensuring a high product yield.

[0017] In the production mold of the silicone mask, an operating handle is fixed to the mold base. The setting of the operating handle facilitates pulling the mold base to slide and realize mold closing and demoulding.

[0018] In the mold for producing the silicone mask, the base is provided with a second core groove, and the lower mold core is slidably connected to the base. The lower mold core can be moved downward relative to the base to fit into the second core groove and cover the notch of the second core groove, or the lower mold core can be moved upward relative to the base to facilitate demolding. The lower mold core can slide up and down relative to the base to separate the lower mold core from the base, thereby ejecting the silicone mask and facilitating removal from the lower mold core.

[0019] Compared with the existing technology, the production mold of this silicone mask has the following advantages:

[0020] 1. During the mold opening process, with the cooperation of the elastic parts and the connecting parts, the upper mold base moves first and the upper mold core moves later, thereby realizing the silicone mask being slowly pulled and separated from the upper mold base and the upper mold core in steps. Compared with the existing direct mold opening and pulling, it is not easy to be torn, thus ensuring the product qualification rate.

[0021] 2. The lower mold base adopts a split structure including the base, left half mold, right half mold and mold base. The silicone mask is gradually separated from the lower mold base by side-pull demoulding, further preventing the silicone mask from being torn during the mold opening process and ensuring the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a three-dimensional structural diagram of the production mold of this silicone mask when the mold is closed.

[0023] Figure 2 This is a three-dimensional structural diagram of the production mold of this silicone mask when it is opened.

[0024] Figure 3 This is the cross section of the silicone mask production mold when it is closed Figure 1 .

[0025] Figure 4 This is the cross section of the silicone mask production mold when it is closed Figure 2 .

[0026] Figure 5 This is a three-dimensional structural diagram of the upper mold base and upper mold core when the mold is closed.

[0027] Figure 6 This is a cross-sectional view of the upper mold base and upper mold core when the mold is closed.

[0028] Figure 7 This is a three-dimensional structural diagram of the upper mold base and upper mold core when the mold is opened.

[0029] Figure 8 This is a cross-sectional view of the upper die base and upper die core when the mold is opened.

[0030] Figure 9 This is an exploded view of the upper die base and upper die core.

[0031] Figure 10 This is a three-dimensional structural diagram of the lower mold base and the lower mold core.

[0032] Figure 11 This is an exploded view of the lower die base and lower die core.

[0033] Figure 12 This is a three-dimensional structural diagram of a silicone mask.

[0034] In the figure, 1. upper template; 2. lower template; 3. upper mold base; 3a. core groove 1; 3a1. abutment step; 3b. limit groove; 4. lower mold base; 4a. base; 4a1. slide rail; 4a2. core base; 4a2a. core groove 2; 4a2b. mold groove 2; 4b. left half mold; 4b1. slide groove; 4c. right half mold; 4d. mold base; 4d1. mold groove 1; 5. upper mold core; 5a. guide hole; 5b. abutment flange; 6. lower mold core; 6a. blind hole for clearance; 7. connecting part; 8. elastic part; 9. cavity; 10. operating handle; 11. driving part 1; 12. driving part 2; 13. connecting rod; 14. connecting plate; 15. silicone mask; 15a. visual window. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0036] like Figure 1-4 As shown, the production mold of the silicone mask includes an upper mold plate 1, a lower mold plate 2, an upper mold base 3, a lower mold base 4, an upper mold core 5 and a lower mold core 6. The upper mold base 3 is fixed on the upper mold plate 1, the lower mold base 4 is arranged on the lower mold plate 2, the upper mold core 5 is slidably connected to the upper mold base 3 through a connecting member 7, and the lower mold core 6 is arranged on the lower mold base 4. The upper mold core 5 and the lower mold core 6 are relatively arranged and can be buckled on the lower mold core 6. An elastic member 8 is provided between the upper mold core 5 and the upper mold base 3 to make the upper mold core 5 have a tendency to move toward the lower mold core 6. The upper mold base 3 can move up and down relative to the lower mold base 4 to achieve mold closing or mold opening, and when the upper mold base 3 moves down to close the mold with the lower mold base 4, a cavity 9 is formed between the upper mold base 3, the lower mold base 4, the upper mold core 5 and the lower mold core 6, and the elastic member 8 is compressed.

[0037] Specifically, if Figure 5-9 As shown, the upper mold base 3 also has a limit groove 3b, and the bottom of the limit groove 3b is provided with a core groove 1a. There are several connecting members 7, each of which is rod-shaped and has one end fixed to the bottom wall of the core groove 1a. The upper mold core 5 has a contact area 1 that can mate with the lower mold core. The contact area 1 has a plurality of guide holes 5a correspondingly formed therein. The guide holes 5a are stepped holes. The free ends of the connecting members 7 extend into the guide holes 5a, and the end has a limit shoulder protruding circumferentially. The elastic member 8 is a spring, which is sleeved on the connecting members 7. The bottom wall of the core groove 1a and the upper surface of the upper mold core 5 are both provided with spring grooves. The two ends of the spring are respectively embedded in the corresponding spring grooves and abut against the bottom wall of the corresponding spring grooves. Under the elastic force of the spring, the limit shoulder can abut against the stepped surface of the guide hole 5a to achieve position limiting.

[0038] The shape of the core groove 3a matches the upper mold core 5. The notch of the core groove 3a is provided with an annular abutting step 3a1, and the upper mold core 5 is provided with an annular abutting flange 5b. When the upper mold base 3 moves down and closes the mold with the lower mold base 4, the upper mold core 5 compresses the elastic member 8 to be embedded in the core groove 3a and the abutting flange 5b abuts on the abutting step 3a1. The lower mold core 6 can cover the notch of the core groove 3a, and the surface of the upper mold core 5 and the inner surface of the upper mold base 3 can form a continuous molding surface.

[0039] Further, if Figure 10 and 11As shown, the lower mold base 4 comprises a base 4a, a left mold half 4b, a right mold half 4c, and a mold base 4d. The base 4a is fixedly or slidably connected to the lower mold plate 2. The base 4a has a protruding core seat 4a2, which defines a second core slot 4a2a. The shape of the second core slot 4a2a matches that of the lower mold core 6. A second driver 12 is fixed to the lower mold plate 2 and located below the base 4a. A connecting plate 14 is fixed to the driving end of the driver 12. A plurality of connecting rods 13 are fixed to the connecting plate 14. The connecting rods 13 extend through the bottom wall of the second core slot 4a2a and are secured to the lower mold core 6. The driver 12 can drive the lower mold core 6 downward to fit within the second core slot 4a2a and cover the notch of the second core slot 4a2a, or it can drive the lower mold core 6 upward to extend out of the second core slot 4a2a. Lower mold core 6 has a second contact area, which is defined by several blind holes 6a corresponding to guide holes 5a. These areas correspond to the visible windows 15a of silicone mask 15. When upper mold base 3 moves downward to close with lower mold base 4, connector 7 can extend into the corresponding blind holes 6a. The first and second contact areas adhere to each other, maintaining a seal and preventing liquid silicone from entering guide holes 5a and blind holes 6a.

[0040] The left and right mold halves 4b and 4c are located on the left and right sides of the lower mold core 6, respectively. Slide rails 4a1 are provided on the base 4a, extending in a left-right direction. Slide slots 4b1 are provided on both the left and right mold halves 4b and 4c, respectively, and the slide rails 4a1 extend through corresponding slide slots 4b1. Actuators 11 are fixed to the left and right sides of the base 4a on the lower mold plate 2. Connecting hooks 1 are fixed to the driving ends of the actuators 11. Connecting hooks 2 are fixed to both the left and right mold halves 4b and 4c, respectively. Connecting hooks 1 are connected to corresponding connecting hooks 2. The two actuators 11 can respectively drive the corresponding left and right mold halves 4b and 4c to slide toward or away from each other along the slide rails 4a1. When the left and right mold halves 4b and 4c are closed, they form a mold hole surrounding the lower mold core 6. The gap between the mold hole walls and the lower mold core 6 constitutes part of the mold cavity 9. The two side walls of the limit groove 3b of the upper mold base 3 are inclined surfaces inclined outward, and when the upper mold base 3 moves down to close the mold with the lower mold base 4, the left half mold 4b and the right half mold 4c are both embedded in the limit groove 3b and respectively abut against the two side walls of the limit groove 3b. Through the guiding effect of the inclined surface, there is a tendency to clamp the left half mold 4b and the right half mold 4c inward, thereby ensuring the mold closing effect.

[0041] Mold base 4d is located behind lower mold core 6. It is slidably connected to base 4a and can slide toward or away from lower mold core 6. Left and right half-grooves are defined on left and right mold halves 4b and 4c, respectively. A groove 1 4d1 is defined on the top surface of mold base 4d. The outer peripheral wall of core base 4a2 is provided with several grooves 2 4a2b. These grooves 1 4d1 and 2a2b are used to form the connector tabs for the silicone mask. When the molds are closed, the left and right half-grooves snap onto mold base 4d. The gaps between mold base 4d and lower mold core 6, between groove 1 4d1 and the wall of the left half-grooves, and between groove 1 4d1 and the wall of the right half-grooves, all constitute part of the aforementioned cavity 9.

[0042] When the production mold is closed, a cavity 9 is formed between the upper mold base 3, the base 4a, the left mold half 4b, the right mold half 4c, the upper mold core 5 of the mold base 4d, and the lower mold core 6. Liquid silicone is injected into the cavity 9 to form the silicone mask 15. When the mold is opened, the upper mold plate 1 drives the upper mold base 3 to move upward together. When the upper mold base 3 just starts to move upward, under the elastic compression force of the elastic member 8, the upper mold core 5 is always buckled and pressed against the lower mold core 6. Most of the silicone mask 15 is pressed by the upper mold core 5. The upper mold base 3 and the upper mold core 5 move relative to each other, and the small part of the silicone mask 15 adhering to the upper mold base 3 is first pulled away from the upper mold base 3. The upper mold base 3 continues to move upward, and the limiting boss of the connecting member 7 rests on the stepped surface of the guide hole 5a. The upper mold core 5 moves upward with the upper mold base 3. At this time, the silicone mask 15 is pressed against the lower mold core 6 by the left half mold 4b, the right half mold 4c, and the mold base 4d. As the upper mold core 5 moves upward, the silicone mask 15 is gradually pulled and separated from the upper mold core 5. Then, the second driving member 12 drives the left half mold 4b and the right half mold 4c to slide away from each other along the slide rail 4a1, separating the silicone mask 15 from the left half mold 4b and the right half mold 4c. Next, the connecting piece of the silicone mask 15 is manually separated from the groove 1 4d1 of the mold base 4d. Then, the operating handle 10 is used to pull the mold base 4d outward and slide away from the mold core, separating the silicone mask 15 from the mold base 4d. Finally, the driving member 11 drives the lower mold core 6 to move upward relative to the base 4a and extend into the core groove 2 4a2a, thereby separating the silicone mask 15 from the base 4a, and then removing the silicone mask 15 from the lower mold core 6 to complete demoulding.

[0043] During the mold opening process, the upper mold core 5 is slidably connected with the upper mold base 3 and cooperates with the elastic member 8 to gradually pull the silicone mask 15 away from the upper mold base 3 and the upper mold core 5. At the same time, the lower mold base 4 is set to a split structure including a base 4a, a left half mold 4b, a right half mold 4c and a mold base 4d. The silicone mask 15 is gradually separated from the lower mold base 4 by side-pulling demoulding, further preventing the silicone mask 15 from being torn during the mold opening process, thereby ensuring the qualified rate of the product.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0045] Although this document frequently uses terms such as upper mold plate 1, lower mold plate 2, upper mold base 3, core groove 1 3a, abutting step 3a1, limiting groove 3b, lower mold base 4, base 4a, slide rail 4a1, core base 4a2, core groove 2 4a2a, mold groove 2 4a2b, left mold half 4b, slide groove 4b1, right mold half 4c, mold base 4d, mold groove 1 4d1, upper mold core 5, guide hole 5a, abutting flange 5b, lower mold core 6, blind hole 6a, connecting member 7, elastic member 8, mold cavity 9, operating handle 10, driving member 11, driving member 2 12, connecting rod 13, connecting plate 14, silicone mask 15, and visual window 15a, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A production mold for a silicone mask, comprising an upper mold base (3) and a lower mold base (4), wherein the upper mold base (3) can move up and down relative to the lower mold base (4), and a lower mold core (6) is provided in the lower mold base (4), characterized in that: An upper mold core (5) is provided in the upper mold base (3), and the upper mold core (5) is slidably connected to the upper mold base (3) through a connecting member (7). The upper mold core (5) and the lower mold core (6) are arranged relative to each other and can be buckled on the lower mold core (6). An elastic member (8) is provided between the upper mold core (5) and the upper mold base (3) to make the upper mold core (5) have a tendency to move toward the lower mold core (6). When the upper mold base (3) moves downward to close the mold with the lower mold base (4), the upper mold base (3), the lower mold base (4), the upper mold core (5) and the lower mold core (6) are A cavity (9) is formed, and the elastic member (8) is compressed; the lower mold base (4) includes a base (4a), a left half mold (4b) and a right half mold (4c); the lower mold core (6) is arranged on the base (4a); the left half mold (4b) and the right half mold (4c) are both slidably connected to the base (4a) and are respectively located on the left and right sides of the lower mold core (6); the left half mold (4b) and the right half mold (4c) are closed together to form a mold hole surrounding the lower mold core (6); and the gap between the hole wall of the mold hole and the lower mold core (6) constitutes the above-mentioned product cavity (9), the lower mold base (4) further includes a mold base (4d) slidably connected to the base (4a), the mold base (4d) is located at the rear side of the lower mold core (6) and can move closer to or away from the lower mold core (6) by sliding, the left half mold (4b) and the right half mold (4c) are respectively provided with a left half groove and a right half groove, and the upper surface of the mold base (4d) is provided with a mold groove 1 (4d1), after the mold is closed, the left half groove and the right half groove are buckled on the mold base (4d), and there is a gap between the mold base (4d) and the lower mold core (6), and between the mold base (4d) and the lower mold core (6). The gaps between the first groove (4d1) and the groove wall of the left half groove and the gaps between the first groove (4d1) of the mold base (4d) and the groove wall of the right half groove both constitute part of the above-mentioned product cavity (9). The base (4a) is provided with a second core groove (4a2a). The lower mold core (6) is slidably connected to the base (4a), and the lower mold core (6) can be moved downward relative to the base (4a) to be embedded in the second core groove (4a2a) and cover the notch of the second core groove (4a2a), or the lower mold core (6) can be moved upward relative to the base (4a) to achieve demoulding.

2. The production mold for the silicone mask according to claim 1, characterized in that: The upper mold base (3) is provided with a core groove (3a) matching the upper mold core (5), and the elastic member (8) is arranged between the upper mold core (5) and the bottom wall of the core groove (3a). When the upper mold base (3) moves downward to close the mold with the lower mold base (4), the upper mold core (5) compresses the elastic member (8) to be embedded in the core groove (3a) and can cover the notch of the core groove (3a).

3. The production mold for the silicone mask according to claim 2, characterized in that: The connecting member (7) is rod-shaped and one end is fixed on the upper mold base (3). The upper mold core (5) has a contact area 1 that can fit with the lower mold core (6). A guide hole (5a) is correspondingly opened on the contact area 1. The guide hole (5a) is a stepped hole. The free end of the connecting member (7) extends into the guide hole (5a) and a limiting boss protrudes circumferentially from the end. The elastic member (8) is a spring. The spring is sleeved on the connecting member (7) and the two ends of the spring respectively rest on the bottom wall of the core groove 1 (3a) and the upper mold core (5). Under the action of the elastic force of the spring, the limiting boss can rest on the stepped surface of the guide hole (5a).

4. The production mold for the silicone mask according to claim 3, characterized in that: The notch of the core groove 1 (3a) is provided with an annular abutting step (3a1), and the upper mold core (5) is provided with an annular abutting flange (5b). When the upper mold base (3) moves downward to close the mold with the lower mold base (4), the upper mold core (5) compresses the elastic member (8) to be embedded in the core groove 1 (3a) and the abutting flange (5b) abuts against the abutting step (3a1).

5. The production mold for the silicone mask according to claim 4, characterized in that: The lower mold core (6) has a second abutment area, and the second abutment area is provided with a blind hole (6a) for making way opposite to the guide hole (5a). When the upper mold base (3) moves downward to close the mold with the lower mold base (4), the connecting member (7) can extend into the corresponding blind hole (6a), and the first abutment area and the second abutment area fit together.

6. The production mold for the silicone mask according to any one of claims 1 to 5, characterized in that: A limiting groove (3b) is also provided on the upper die base (3), and the core groove (3a) is provided at the bottom of the limiting groove (3b). The two side walls of the limiting groove (3b) are inclined surfaces inclined outwards, and when the upper die base (3) moves downward to close the mold with the lower die base (4), the left half mold (4b) and the right half mold (4c) are both embedded in the limiting groove (3b) and respectively abut against the above-mentioned two side walls of the limiting groove (3b).

7. The production mold for the silicone mask according to any one of claims 1 to 5, characterized in that: The base (4a) is provided with a slide rail (4a1) arranged in the left-right direction, and the left half mold (4b) and the right half mold (4c) are both provided with a slide groove (4b1), the slide rails (4a1) pass through the corresponding slide grooves (4b1), and the left half mold (4b) and the right half mold (4c) can slide along the slide rails (4a1).

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