Hot press forming die for producing hinge cover

Abstract

The utility model discloses a hot press forming die for producing a hinge cover, which comprises an upper die, a lower die and a middle plate, and the middle plate is arranged between the upper die and the lower die. A forming boss is arranged on the upper die, a forming die cavity is formed in the middle plate and matched with the forming boss, a groove is formed in the middle of the middle plate, and a protruding block is arranged in the middle of the lower die and matched with the groove. A forming column and a forming through hole are arranged in the forming die cavity, the forming through hole is communicated with the groove, a forming groove is formed in the protruding block, and the position of the forming groove is opposite to the position of the forming through hole. Through the design of the upper die, the lower die and the middle plate, hot press forming of a complex hinge cover is achieved, meanwhile, the product quality is guaranteed, and high economic benefits are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of hot pressing mold technology, and specifically relates to a hot pressing mold for producing hinge covers. Background Technology

[0002] Currently, the mainstream production methods for hinge covers are injection molding and thermoforming. However, injection molding has high mold costs and large initial investment, and may present molding difficulties for some hinge covers made of special materials or with special structures. Thermoforming is more efficient, produces better product quality, allows for precise control of dimensions and shape, has strong material adaptability, and has relatively lower equipment investment and mold costs compared to injection molding. However, it also has certain limitations in the design and molding of complex hinge covers. Thermoforming requires the design of corresponding molds, but existing molds have shortcomings in terms of molding efficiency and effect.

[0003] like Figure 7 As shown, the hinge cover is H-shaped overall, with pillars and a boss pillar at each end. The boss pillar has an inverted mushroom-shaped base, and the hinge cover base has a smooth transition arc surface. The shape and structure are complex. Using traditional hot-press molds is difficult to form, and the formed product is prone to producing many burrs, resulting in poor forming quality. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a hot pressing mold for producing hinge covers. Through the design of the upper mold, lower mold and middle plate, the forming effect of the hinge seat is ensured, and the simultaneous processing of multiple cavities improves production efficiency.

[0005] Technical solution: To achieve the above objectives, this utility model provides a hot pressing mold for producing hinge covers, comprising:

[0006] The upper mold, the lower mold, and the middle plate are provided, wherein the middle plate is disposed between the upper mold and the lower mold;

[0007] The upper mold is provided with a forming boss, the middle plate is provided with a forming cavity, the forming cavity fits with the forming boss, the middle plate is provided with a groove, and the lower mold is provided with a protrusion at the middle position, the protrusion fits with the groove;

[0008] The molding cavity is provided with molding pillars and molding through holes. The molding through holes communicate with the grooves. The protrusions are provided with molding grooves. The positions of the molding grooves are opposite to the positions of the molding through holes.

[0009] Furthermore, the formed boss includes a first plane, a second plane, and a curved transition surface. The height of the first plane is greater than that of the second plane, and the second plane is smoothly connected to the first plane via the curved transition surface. The first plane, the second plane, and the curved transition surface form a smooth curved transition surface on the hinge cover.

[0010] Furthermore, both the forming boss and the forming cavity are H-shaped, the forming pillar and the forming through hole are located at two corners on the same side, the forming pillar is opposite to the second plane, and the forming through hole is opposite to the first plane.

[0011] Furthermore, the forming groove is hemispherical.

[0012] Furthermore, the upper section with a larger diameter and the lower section with a smaller diameter of the forming through hole are connected by an inclined middle section. The material forms a chamfered boss in the forming through hole.

[0013] Furthermore, the bottom of the lower section is connected to a flared opening, the bottom diameter of which is equal to the top diameter of the forming groove. The flared opening and the hemispherical forming groove together form the cavity of the inverted mushroom head.

[0014] Furthermore, the upper mold has at least two rows of forming bosses along its length, each row including multiple forming bosses, and the number of forming cavities and forming grooves is consistent with the number of forming bosses. Designed as a multi-cavity mold, multiple hinge covers can be formed in a single hot pressing, which helps improve processing efficiency.

[0015] Furthermore, the lower mold is provided with a rectangular groove, the width of which is the same as the width of the middle plate. An arc-shaped protrusion is provided on the vertical surface of the rectangular groove, and an arc-shaped groove matching the arc-shaped protrusion is provided on the side of the middle plate. During mold closing, the outer periphery of the middle plate is locked into the rectangular groove, and locking is achieved through the interaction of the arc-shaped groove and the arc-shaped protrusion. This prevents excessive pressure during hot pressing, which could cause the middle plate to move and result in product deformities.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0017] 1. This utility model provides a hot pressing mold for producing hinge covers. Through the design of the upper mold, lower mold and middle plate, it realizes the hot pressing of complex hinge covers while ensuring product quality.

[0018] 2. This utility model provides a hot pressing mold for producing hinge covers. The mold is designed with multiple cavities in one mold, which can process multiple workpieces at a time, thereby improving processing efficiency. At the same time, the mushroom head is formed by the cooperation of the flared mouth and the forming groove, which effectively reduces burrs. Furthermore, during demolding, the product is separated from the lower mold, so even if the boss breaks, the residue will not remain in the forming through hole.

[0019] 3. In this utility model, the middle plate and the lower mold are precisely positioned through multiple positioning mechanisms, ensuring high-precision alignment during mold closing and effectively guaranteeing the hot pressing molding effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a hot pressing mold for producing hinge covers according to the present invention;

[0021] Figure 2 This is a cross-sectional view of a hot-press forming mold for producing hinge covers according to the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the molded boss described in this utility model;

[0023] Figure 4 This is a schematic diagram of the molding cavity described in this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the formed through hole described in this utility model;

[0025] Figure 6 This is a top perspective view of a thermoforming mold for producing hinge covers according to the present invention.

[0026] Figure 7 This is a schematic diagram of the hinge cover described in this utility model.

[0027] In the picture:

[0028] 1-Upper mold, 11-Forming boss, 111-First plane, 112-Second plane, 113-Curved transition surface;

[0029] 2-Lower mold; 21-Protrusion, 211-Forming groove, 22-Rectangular groove, 221-Arc-shaped protrusion;

[0030] 3-Core bar; 31-Molding cavity; 311-Molding column; 312-Molding through hole; 3121-Upper section; 3122-Lower section; 3123-Middle section; 3124-Flare mouth; 32-Groove; 33-Arc-shaped groove. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0032] In this embodiment, as Figures 1 to 4 This utility model discloses a hot pressing mold for producing hinge covers, comprising:

[0033] The upper mold 1, the lower mold 2, and the middle plate 3 are provided between the upper mold 1 and the lower mold 2;

[0034] The upper mold 1 is provided with a forming boss 11, and the middle plate 3 is provided with a forming cavity 31. The forming cavity 31 fits with the forming boss 11. The middle plate 3 is provided with a groove 32 in the middle. The lower mold 2 is provided with a protrusion 21 in the middle position. The protrusion 21 fits with the groove 32. The forming boss 11 and the forming cavity 31 cooperate to form the base shape of the hinge cover. The groove 32 on the middle plate and the protrusion 21 on the lower mold can improve the accuracy of mold closing and help improve product quality.

[0035] The molding cavity 31 is provided with a molding pillar 311 and a molding through hole 312. The molding through hole 312 communicates with the groove 32. The protrusion 21 is provided with a molding groove 211, and the position of the molding groove 211 is opposite to the position of the molding through hole 312. The molding pillar 311 is used to form the pillar on the hinge cover. During hot pressing, the material will flow into the molding through hole 312 to form the boss pillar.

[0036] Specifically, the formed boss 11 includes a first plane 111, a second plane 112 and an arc transition surface 113. The height of the first plane 111 is greater than that of the second plane 112, and the second plane 112 is smoothly connected to the first plane 111 through the arc transition surface 113.

[0037] Specifically, the forming boss 11 and the forming cavity 31 are both H-shaped, the forming pillar 311 and the forming through hole 312 are located at two corners on the same side, the forming pillar 311 is opposite to the second plane 112, and the forming through hole 312 is opposite to the first plane 111.

[0038] Specifically, the forming groove 211 is hemispherical. The forming through hole 312 has a larger diameter upper section 3121 and a smaller diameter lower section 3122, which are connected by an inclined middle section 3123. The bottom of the lower section 3122 is connected to a flared opening 3124, the bottom diameter of which is equal to the top diameter of the forming groove 211. After the material cools in the forming through hole 312, it can form a beveled boss column under the action of the upper section 3121, lower section 3122, and middle section 3123, while a mushroom head is formed in the flared opening and the forming groove 211. By connecting the flared opening 3124 with the forming groove 211, burrs on the product can be effectively reduced, and product quality can be improved.

[0039] Specifically, the upper mold 1 has at least two rows of forming bosses 11 along its length, each row including multiple forming bosses 11, and the number of forming cavities 31 and forming grooves 211 is the same as the number of forming bosses 11. A mold contains multiple forming parts, and multiple workpieces can be formed in a single hot pressing, improving processing efficiency.

[0040] To further improve product quality, this embodiment includes a rectangular groove 22 on the lower mold 2, the width of which is the same as the width of the middle plate 3. An arc-shaped protrusion 221 is provided on the vertical surface of the rectangular groove 22, and an arc-shaped groove 33 matching the arc-shaped protrusion 221 is provided on the side of the middle plate 3. The middle plate 3 not only achieves positioning through the cooperation of the groove 32 and the boss 11, but also achieves more precise positioning and a more stable structure through the cooperation of the rectangular groove 22, the arc-shaped protrusion 221, and the arc-shaped groove 33. This allows for the selection of higher injection pressure and speed during processing, contributing to improved product quality and processing efficiency.

[0041] The working principle of the above embodiments is as follows:

[0042] This utility model discloses a hot-press molding die for processing silicone bases. In use, the cut silicone raw material is placed into the molding cavity 31; the middle plate 3 is connected and installed with the lower mold 2, the upper mold 1 is pressed down, and the molding boss 11 is engaged with the molding cavity 31. The product is hot-pressed in the molding cavity 31. After cooling, the mold is opened and the middle plate 3 is removed. The product first separates from the molding groove 211 on the lower mold 2. Since the hinge cover is made of silicone, it is relatively soft and has good elasticity. Even if there is an inverted mushroom head structure, it can be easily removed from the middle plate 3.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A thermoforming mold for producing hinge covers, characterized in that: include: The upper mold (1), the lower mold (2) and the middle plate (3) are provided between the upper mold (1) and the lower mold (2); The upper mold (1) is provided with a forming boss (11), the middle plate (3) is provided with a forming cavity (31), the forming cavity (31) fits with the forming boss (11), the middle plate (3) is provided with a groove (32), and the lower mold (2) is provided with a protrusion (21) at the middle position, the protrusion (21) fits with the groove (32); The molding cavity (31) is provided with a molding column (311) and a molding through hole (312). The molding through hole (312) communicates with the groove (32). The protrusion (21) is provided with a molding groove (211). The position of the molding groove (211) is opposite to the position of the molding through hole (312).

2. The hot pressing mold for producing hinge covers according to claim 1, characterized in that: The formed boss (11) includes a first plane (111), a second plane (112) and an arc transition surface (113). The height of the first plane (111) is greater than that of the second plane (112). The second plane (112) between the first plane (111) and the second plane (112) are smoothly connected by the arc transition surface (113).

3. A hot pressing mold for producing hinge covers according to claim 2, characterized in that: The forming boss (11) and the forming cavity (31) are both H-shaped. The forming pillar (311) and the forming through hole (312) are located at two corners on the same side. The forming pillar (311) is opposite to the second plane (112), and the forming through hole (312) is opposite to the first plane (111).

4. A hot pressing mold for producing hinge covers according to claim 1, characterized in that: The forming groove (211) is hemispherical.

5. A hot pressing mold for producing hinge covers according to claim 4, characterized in that: The formed through hole (312) has a larger diameter upper section (3121) and a smaller diameter lower section (3122), and the upper section (3121) and the lower section (3122) are connected by an inclined middle section (3123).

6. A hot pressing mold for producing hinge covers according to claim 5, characterized in that: The bottom of the lower section (3122) is connected to a flared opening (3124), the bottom diameter of which is equal to the top diameter of the forming groove (211).

7. A hot pressing mold for producing hinge covers according to claim 1, characterized in that: The upper mold (1) is provided with at least two rows of forming bosses (11) along its length direction, each row including multiple forming bosses (11), and the number of forming mold cavities (31) and forming grooves (211) is consistent with the number of forming bosses (11).

8. A hot pressing mold for producing hinge covers according to claim 1, characterized in that: The lower mold (2) is provided with a rectangular groove (22), the width of which is the same as the width of the middle plate (3). The rectangular groove (22) has an arc-shaped protrusion (221) on its vertical surface, and the middle plate (3) has an arc-shaped groove (33) that matches the arc-shaped protrusion (221) on its side surface.

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