Reversed flexible material demolding structure and mold equipment

Abstract

The utility model discloses an inverted flexible material demolding structure and mold equipment, and the inverted flexible material demolding structure comprises a fixed mold structure and a movable mold structure, a mold cavity is formed after the fixed mold structure and the movable mold structure are closed; the mold cavity part is sunken towards the fixed mold structure to form an inverted buckle cavity; the fixed die structure is provided with a first through hole communicated to the inverted buckling cavity; a core withdrawing insert is arranged in the first through hole; the core retreating insert is connected with the core retreating device, and the core retreating device can drive the core retreating insert to be far away from or close to the inverted buckling cavity; during forming, one end of the core withdrawing insert and the fixed mold structure form an inverted buckling cavity; and during demolding, the core withdrawing insert moves in the direction far away from the inverted buckling cavity. The reverse flexible material demoulding structure disclosed by the utility model solves the problem that a reverse buckle is easy to deform and damage when a product with the reverse buckle is demoulded. And particularly, when a product with a large-area inverted buckle is produced, the reject ratio of the product can be greatly reduced, so that the production quality and the production benefit are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an undercut flexible material demoulding structure and mold equipment. Background Art

[0002] Existing products with undercut suction cups, such as bathroom anti-slip mats, are mostly made of flexible materials such as thermoplastic elastomers (TPE) by injection molding. The injection molding mold is provided with an undercut cavity for molding the undercut. When the mold is opened, the molded undercut is easy to be adsorbed to the inner wall of the undercut cavity; especially when demolding a large area of ​​the undercut, the product is prone to deformation and damage. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an undercut flexible material demoulding structure and a mold device, the undercut flexible material demoulding structure comprises a fixed mold structure and a movable mold structure;

[0004] The fixed mold structure and the movable mold structure are molded together to form a mold cavity; the mold cavity is partially recessed toward the fixed mold structure to form an undercut cavity;

[0005] The fixed mold structure is provided with a first through hole connected to the undercut cavity; a core-retracting insert is provided in the first through hole;

[0006] The core-retracting insert is connected to a core-retracting device, and the core-retracting device can drive the core-retracting insert to move away from or approach the undercut cavity;

[0007] During molding, one end of the core-retracting insert and the fixed mold structure form an undercut cavity;

[0008] During demoulding, the core-retracting insert moves in a direction away from the undercut cavity.

[0009] Preferably, a protrusion is provided at one end of the core-retracting insert close to the undercut cavity; the diameter of the protrusion is smaller than the diameter of the connecting portion of the core-retracting insert connected thereto.

[0010] Preferably, the protrusion is hemispherical.

[0011] Preferably, a hot needle valve is provided in the core withdrawing insert.

[0012] Preferably, the core withdrawing insert moves synchronously with the hot nozzle needle valve.

[0013] Preferably, the hot needle valve is provided with a gate; the gate is arranged on the central axis of the undercut cavity.

[0014] Preferably, the fixed mold structure comprises an upper fixed plate, a hot runner plate, a spring plate, and a fixed mold plate which are arranged in sequence;

[0015] The movable mold structure comprises a movable mold plate and a lower fixed plate which are arranged in sequence;

[0016] The fixed mold plate and the movable mold plate are molded together to form the mold cavity;

[0017] The first through hole passes through the fixed template;

[0018] The core-retracting insert is connected to a spring plate; the spring plate is connected to an external buckle-making machine; the external buckle-making machine drives the spring plate away from or close to the fixed template, thereby driving the core-retracting insert away from or close to the undercut cavity.

[0019] Preferably, a spring is provided in the fixed template; when the spring plate is assembled with the fixed template, the spring plate compresses the spring.

[0020] The utility model also provides a mold device, which adopts any of the above-mentioned undercut flexible material demoulding structures;

[0021] It also includes an adsorption device; after the mold is opened, the adsorption device adsorbs and takes out the product.

[0022] The undercut flexible material demoulding structure provided by the utility model solves the problem that the undercut product is prone to deformation and damage during demoulding through the fixed mold structure, the movable mold structure, the first through hole connected to the undercut cavity, the core-retracting insert, and the core-retracting device. Especially when producing products with large undercuts, the defective rate of the products can be greatly reduced, thereby improving the production quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of an undercut flexible material demoulding structure provided in an embodiment of the utility model;

[0024] Figure 2 It is a top view of the demoulding structure of the undercut flexible material;

[0025] Figure 3 for Figure 2 Sectional view along AA;

[0026] Figure 4 for Figure 2 Cross-section of EE;

[0027] Figure 5 for Figure 3 A magnified view of part B;

[0028] Figure 6 Schematic diagram of the inverted cavity;

[0029] Figure 7 for Figure 3 Enlarged view of part C;

[0030] Figure 8 A schematic diagram of one side of the mold cavity is provided for the fixed mold structure;

[0031] Fig. 9 A schematic diagram of the structure of a core-retracting insert with a protrusion at one end;

[0032] Fig.10 A schematic diagram of the structure of one end of the hot nozzle provided with a gate;

[0033] Fig.11 For product pictures;

[0034] Fig.12 for Fig.11 A magnified view of part D in the middle;

[0035] Among them: 10, fixed mold structure; 12, core-retracting insert; 121, protrusion; 14, hot nozzle needle valve; 141, gate; 15, upper fixed plate; 151, glue inlet; 16, hot runner plate; 17, spring plate; 18, fixed mold plate; 181, spring; 19, undercut cavity; 20, movable mold structure; 21, movable mold plate; 22, lower fixed plate; 30, product; 31, undercut; 40, external button making machine. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The embodiment of the utility model provides an undercut flexible material demoulding structure and a mold device, the undercut flexible material demoulding structure comprises a fixed mold structure 10 and a movable mold structure 20;

[0040] The fixed mold structure 10 and the movable mold structure 20 are molded together to form a mold cavity; the mold cavity is partially recessed toward the fixed mold structure 10 to form an undercut cavity 19;

[0041] The fixed mold structure 10 is provided with a first through hole connected to the undercut cavity 19; a core-retracting insert 12 is provided in the first through hole;

[0042] The core-retracting insert 12 is connected to a core-retracting device, and the core-retracting device can drive the core-retracting insert 12 away from or close to the undercut cavity 19;

[0043] During molding, one end of the core-retracting insert 12 and the fixed mold structure 10 form an undercut cavity 19;

[0044] During demoulding, the core-retracting insert 12 moves in a direction away from the undercut cavity 19 .

[0045] When implementing it, Fig.11 , Fig.12 As shown, the surface of the product 30 to be formed is provided with an undercut structure 31;

[0046] like Figure 1 , Figure 2 , Figure 3 As shown, the undercut flexible material demoulding structure includes a fixed mold structure 10 and a movable mold structure 20;

[0047] The fixed mold structure 10 and the movable mold structure 20 are molded together to form a mold cavity, which has the same shape as the product 30 and is used to mold the product 30; the mold cavity has several areas that are recessed toward the fixed mold structure 10 to form undercut cavities 19;

[0048] The fixed mold structure 10 is provided with a first through hole (a through hole where the core-retracting insert 12 is located, not marked in the figure) connected to the undercut cavity 19; the number of the first through holes is determined according to the number of undercuts 31 required for the product 30; the core-retracting insert 12 is provided in the first through hole; the core-retracting insert 12 is adapted to the first through hole;

[0049] The core-retracting insert 12 is connected to the core-retracting device, and the core-retracting device can adopt an existing separation device; the core-retracting device can drive the core-retracting insert 12 away from or close to the undercut cavity 19;

[0050] During molding, one end of the core-retracting insert 12 close to the undercut cavity 19 and the first through hole of the fixed mold structure 10 form the undercut cavity 19;

[0051] During demoulding, the core-retracting insert 12 moves away from the undercut cavity 19. The withdrawal of the core-retracting insert 12 can, on the one hand, make room for the pull-out deformation of the undercut 31, thereby facilitating the pull-out of the undercut 31; on the other hand, it can destroy the surface adsorption environment between the undercut cavity 19 and the formed surface of the undercut 31 when being pulled out; thereby reducing the problem of the undercut 31 being pulled, deformed or damaged due to insufficient deformation space or excessive adsorption force with the inner wall of the undercut cavity 19 during the demoulding process.

[0052] The demoulding structure of the undercut flexible material provided by the embodiment of the utility model solves the problem that the product with undercut is easily deformed and damaged during demoulding by means of the fixed mold structure 10, the movable mold structure 20, the first through hole connected to the undercut cavity 19, the core-retracting insert 12, and the structure of the core-retracting device. Especially when producing products with large undercuts, the defective rate of the products can be greatly reduced, thereby improving the production quality and production efficiency.

[0053] Furthermore, a protrusion 121 is provided at one end of the core-retracting insert 12 close to the undercut cavity 19 ; the diameter of the protrusion 121 is smaller than the diameter of the connecting portion of the core-retracting insert 12 connected thereto.

[0054] When implementing it, Figure 6 As shown, the core-retracting insert 12 is adapted to the first through hole, and a protrusion 121 is provided at one end of the core-retracting insert 12 close to the undercut cavity 19; the diameter of the protrusion 121 is smaller than the diameter of the connecting portion of the core-retracting insert 12 connected thereto. The undercut 31 formed by this structure can form a depression in the middle, thereby improving the adsorption performance of the undercut 31.

[0055] Furthermore, the protrusion 121 is hemispherical.

[0056] Furthermore, a hot needle valve 14 is provided in the core withdrawing insert 12 .

[0057] When implementing it, Figure 3 , Figure 7 and Fig.10 As shown, a hot nozzle needle valve 14 is arranged in the core-retracting insert 12. In this structure, the core-retracting insert 12 can be used as a hot nozzle bushing, and the hot nozzle bushing and the hot nozzle needle valve 14 connection structure can adopt the existing structure and will not be repeated here.

[0058] Furthermore, the core withdrawing insert 12 moves synchronously with the hot nozzle needle valve 14.

[0059] During specific implementation, the core-retracting insert 12 moves synchronously with the hot nozzle needle valve 14. Since the core-retracting insert 12 needs to withdraw from the undercut cavity 19, the hot nozzle needle valve 14 must seal the glue position and cannot be separated from the glue sealing surface. If the hot nozzle needle valve 14 is opened for a long time and then closed, it will cause the hot nozzle needle valve 14 to have flash. Through the design of the synchronous movement of the core-retracting insert 12 and the hot nozzle needle valve 14, the glue sealing surface of the hot nozzle needle valve 14 and the core-retracting insert 12 remain relatively still, and only the core-retracting insert 12 and the fixed mold structure 10 are moving relatively, thereby achieving the purpose of not affecting the glue sealing.

[0060] Furthermore, the hot needle valve 14 is provided with a gate 141 ; the gate 141 is provided on the central axis of the undercut cavity 19 .

[0061] When implementing it, Figure 7 As shown, the gate 141 of the hot needle valve is arranged on the central axis of the undercut cavity 19 to avoid affecting the appearance of the gate 141.

[0062] Furthermore, the fixed mold structure 10 includes an upper fixed plate 15, a hot runner plate 16, a spring plate 17, and a fixed mold plate 18 which are arranged in sequence;

[0063] The movable mold structure 20 includes a movable mold plate 21 and a lower fixed plate 22 which are arranged in sequence;

[0064] The fixed mold plate 18 and the movable mold plate 21 are molded together to form the mold cavity;

[0065] The first through hole passes through the fixed template 18;

[0066] The core-retracting insert 12 is connected to a spring plate 17 ; the spring plate 17 is connected to an external buckle-making machine 40 ; the external buckle-making machine 40 drives the spring plate 17 away from or close to the fixed template 18 , thereby driving the core-retracting insert 12 away from or close to the undercut cavity 19 .

[0067] In a specific implementation, the fixed mold structure 10 includes an upper fixed plate 15, a hot runner plate 16, a spring plate 17, and a fixed mold plate 18 which are arranged in sequence;

[0068] The movable mold structure 20 includes a movable mold plate 21 and a lower fixed plate 22 which are arranged in sequence;

[0069] The fixed mold plate 18 and the movable mold plate 21 are molded together to form a mold cavity;

[0070] The first through hole penetrates the fixed template 18;

[0071] The upper end of the core-retracting insert 12 is connected to the spring plate 17; the spring plate 17 is connected to the external external button-making machine 40, and the external button-making machine 40 adopts the existing external button-making machine device; the external external button-making machine 40 drives the spring plate 17 away from or close to the fixed template 18, thereby driving the core-retracting insert 12 away from or close to the undercut cavity 19. The external external button-making machine 40 and the spring plate 17 constitute a core-retracting device;

[0072] The upper fixed plate 15 is provided with a glue inlet 151; the glue inlet 151 enters the mold cavity or the undercut cavity 19 through the flow channel formed by the hot runner plate 16, the spring plate 17, and the fixed mold plate 18 in sequence, or the glue inlet 151 enters the undercut cavity 19 through the flow channel formed by the hot runner plate 16, the core-retracting insert 12 and the hot nozzle needle valve 14 in sequence.

[0073] The mold opening method adopts secondary mold opening. The first mold opening is to open the core-retracting insert 12 through the core-retracting device to reduce the influence of air adsorption force; the second mold opening is to open the PL surface (parting surface), and then use an adsorption device such as a robot to adsorb the product surface and strongly pull out the product.

[0074] The undercut flexible material demoulding structure provided by the embodiment of the utility model reduces the ejection structure, simplifies the mold structure, and reduces the risk of template deformation compared to the existing mold structure.

[0075] Specifically, Figure 3 As shown, the core-retracting insert 12 passes through the spring plate 17 and the fixed mold plate 18, the cross-section of the first through hole at the upper end of the spring plate 17 is T-shaped, and the cross-section of the upper end of the core-retracting insert 12 is T-shaped; the upper end of the core-retracting insert 12 is arranged in the first through hole at the upper end of the spring plate 17.

[0076] Furthermore, a spring 181 is provided in the fixed mold plate 18 ; when the spring plate 17 is assembled with the fixed mold plate 18 , the spring 181 is compressed by the spring plate 17 .

[0077] When implementing it, Figure 4 As shown, a spring 181 is provided in the fixed template 18; when the spring plate 17 is assembled with the fixed template 18, the spring plate 17 compresses the spring 181; when the external button making machine 40 and the spring plate 17 drive the core-retracting insert 12 away from the undercut cavity 19, at this time, the spring plate 17 is also away from the fixed template 18; the spring 181 can provide elastic force for the separation of the spring plate 17 and the fixed template 18, thereby improving the withdrawal efficiency of the core-retracting insert 12.

[0078] The embodiment of the utility model also provides a mold device, which adopts any of the above-mentioned undercut flexible material demoulding structures;

[0079] It also includes an adsorption device; the adsorption device adopts an existing structure, such as an existing negative pressure manipulator; after the mold is opened, the adsorption device adsorbs and takes out the product 30.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An undercut flexible material demoulding structure, characterized in that: It comprises a fixed mold structure (10) and a movable mold structure (20); The fixed mold structure (10) and the movable mold structure (20) are molded together to form a mold cavity; the mold cavity portion is recessed toward the fixed mold structure (10) to form an undercut cavity (19); The fixed mold structure (10) is provided with a first through hole connected to the undercut cavity (19); a core-retracting insert (12) is provided in the first through hole; The core-retracting insert (12) is connected to a core-retracting device, and the core-retracting device can drive the core-retracting insert (12) to move away from or closer to the undercut cavity (19); During molding, one end of the core-retracting insert (12) and the fixed mold structure (10) form an undercut cavity (19); During demoulding, the core-retracting insert (12) moves in a direction away from the undercut cavity (19).

2. The undercut flexible material demoulding structure according to claim 1, characterized in that: A protrusion (121) is provided at one end of the core-retracting insert (12) close to the undercut cavity (19); the diameter of the protrusion (121) is smaller than the diameter of the connecting portion of the core-retracting insert (12) connected thereto.

3. The undercut flexible material demoulding structure according to claim 2, characterized in that: The protrusion (121) is hemispherical.

4. The undercut flexible material demoulding structure according to claim 1, characterized in that: A hot needle valve (14) is arranged inside the core-retracting insert (12).

5. The undercut flexible material demoulding structure according to claim 4, characterized in that: The core-retracting insert (12) moves synchronously with the hot nozzle needle valve (14).

6. The undercut flexible material demoulding structure according to claim 4, characterized in that: The hot nozzle needle valve (14) is provided with a gate (141); the gate (141) is arranged on the central axis of the undercut cavity (19).

7. The undercut flexible material demoulding structure according to any one of claims 1 to 6, characterized in that: The fixed mold structure (10) comprises an upper fixed plate (15), a hot runner plate (16), a spring plate (17), and a fixed mold plate (18) which are arranged in sequence; The movable mold structure (20) comprises a movable mold plate (21) and a lower fixed plate (22) which are arranged in sequence; The fixed mold plate (18) and the movable mold plate (21) are molded together to form the mold cavity; The first through hole passes through the fixed template (18); The core-retracting insert (12) is connected to a spring plate (17); the spring plate (17) is connected to an external buckle-making machine (40); the external buckle-making machine (40) drives the spring plate (17) away from or close to the fixed template (18), thereby driving the core-retracting insert (12) away from or close to the undercut cavity (19).

8. The undercut flexible material demoulding structure according to claim 7, characterized in that: A spring (181) is arranged inside the fixed mold plate (18); when the spring plate (17) and the fixed mold plate (18) are assembled, the spring plate (17) compresses the spring (181).

9. A mold device, characterized in that: Adopting the undercut flexible material demoulding structure as described in any one of claims 1 to 8; It also includes an adsorption device; after the mold is opened, the adsorption device adsorbs and takes out the product (30).

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