Micro-ventilation mold structure for ultra-thin keycap forming

Abstract

This utility model discloses a micro-venting mold structure for ultra-thin keycap molding, specifically relating to the field of mold technology. It includes a base and a mold body located on top of the base. The key feature is that the mold body has an auxiliary component for venting; the auxiliary component includes two T-shaped air cylinders, each with through holes on both the front and rear sides of its top. An adjusting column is rotatably connected to the top of each air cylinder, with an air cavity inside the top of the adjusting column and multiple air holes communicating with the air cavity on its outer surface. This utility model uses a synchronous belt and two synchronous pulleys to drive the two adjusting columns to rotate synchronously, causing the connecting holes on the adjusting columns to misalign or correspond with the through holes. This allows for adjustment of the air cylinders to vent or close according to processing requirements. The overall structure is simple, requiring no complex linkage structure, thus effectively reducing manufacturing and maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and more specifically to a micro-ventilation mold structure for molding ultra-thin keycaps. Background Technology

[0002] As electronic devices become increasingly thinner and more precise, higher demands are being placed on keycaps in areas such as laptop keyboards, tablet virtual keys, and various slim input devices. Ultra-thin keycaps, in particular, are experiencing continuous market demand growth due to their ability to better fit compact spaces and conform to ergonomic aesthetic trends. In the production of ultra-thin keycaps, injection molding plays a crucial role as a key manufacturing process. Injection molds face numerous significant technical challenges in molding ultra-thin keycaps, especially in the venting stage.

[0003] As shown in the prior art of CN222309686U, although this prior art uses a cylinder in conjunction with a connecting rod, a protrusion, a rotating cylinder, and a spiral groove to move a T-shaped rod up and down on the inner wall of the slide groove, and the upward sliding of the T-shaped rod can disengage the ball plug from the through hole to facilitate the exhaust of air from the cavity between the upper and lower molds, and the downward sliding of the T-shaped rod can cause the ball plug to fit into the inside of the through hole, at which point the ball plug can be used to seal the through hole and prevent plastic from entering the vent hole and causing blockage, the operating structure of this prior art is relatively complex. It is driven by a linkage structure, and the venting operation is achieved by the spiral groove and the T-shaped rod. The machining of the spiral groove and other workpieces is relatively complex, which will affect the cost and subsequent maintenance costs. Utility Model Content

[0004] To overcome the aforementioned deficiencies in the prior art, this utility model provides a micro-venting mold structure for ultra-thin keycap molding. Two adjusting columns rotate synchronously via a synchronous belt and two synchronous pulleys, causing the connecting holes on the adjusting columns to misalign or correspond with the through holes. This allows for the adjustment of the air cylinder to vent or seal according to processing requirements. The overall structure is simple, requiring no complex linkage structure, thus effectively reducing manufacturing and maintenance costs, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micro-venting mold structure for forming ultra-thin keycaps, comprising a base and a mold body disposed on the top of the base, characterized in that: the mold body is provided with auxiliary components for venting. The auxiliary component includes two air cylinders with a T-shaped cross-section. The air cylinders have through holes on both the front and rear sides of their top ends. An adjusting column is rotatably connected to the outside of the top end of the air cylinders. An air cavity is opened inside the top end of the adjusting column, and multiple air holes communicating with the air cavity are opened outside the top end of the adjusting column. A connecting hole is opened on one side of the bottom end of the adjusting column corresponding to the air hole, and the connecting hole is communicating with the air cavity. Both adjusting columns are fitted with synchronous pulleys on their outer tops, and the two synchronous pulleys are driven by a synchronous belt.

[0006] In a preferred embodiment, a fixed ring groove is provided inside the bottom end of the adjusting column, and a positioning ring is provided inside the fixed ring groove, and the positioning ring is sleeved on the outside of the air cylinder.

[0007] In a preferred embodiment, the mold body includes a lower mold base and an upper mold base disposed on the top of the base, the upper mold base being disposed on the top of the lower mold base, and an injection tube being fixedly connected to the top of the upper mold base, the injection tube being disposed inside the timing belt; The top of the upper mold base has an installation hole on one side corresponding to the air cylinder. The air cylinder and the adjusting column are both located inside the installation hole. The bottom of the air cylinder is fixed to the inner wall of the installation hole, and the top of the adjusting column passes through the installation hole and extends to the top of the upper mold base.

[0008] In a preferred embodiment, a servo motor is provided at the top of one of the adjustment columns, and the output shaft of the servo motor is fixed to the top of the adjustment column.

[0009] In a preferred embodiment, a fixed bracket is installed on the top of the upper mold base on the side corresponding to the servo motor, and the servo motor is installed on the top of the fixed bracket.

[0010] In a preferred embodiment, two spaced guide posts are installed at the top of each end of the base, and guide plates are installed on both sides of the upper mold base, with the guide plates sleeved on the outside of the two guide posts.

[0011] The technical effects and advantages of this utility model are as follows: The two adjusting columns rotate synchronously by means of a synchronous belt and two synchronous pulleys, so that the connecting holes on the adjusting columns are misaligned or correspond to the through holes. Then, the air cylinder is adjusted for exhaust or closure according to the processing requirements. The overall structure is simple and does not require a complex linkage structure, which can effectively reduce the cost of manufacturing and subsequent maintenance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the upper mold base after adjustment according to this utility model; Figure 3This is a sectional view of the upper mold base of this utility model; Figure 4 This is a front view of the adjusting column of this utility model; Figure 5 This is a cross-sectional view of the adjusting column of this utility model.

[0013] The attached diagram is labeled as follows: 1. Base; 2. Air cylinder; 3. Through hole; 4. Adjusting column; 5. Air chamber; 6. Air hole; 7. Connecting hole; 8. Synchronous pulley; 9. Synchronous belt; 10. Fixed ring groove; 11. Positioning ring; 12. Lower mold base; 13. Upper mold base; 14. Injection tube; 15. Mounting hole; 16. Servo motor; 17. Fixed bracket; 18. Guide column; 19. Guide plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Refer to the instruction manual appendix Figure 1-5 This utility model provides a micro-venting mold structure for ultra-thin keycap molding, including a base 1 and a mold body disposed on the top of the base 1. The mold body is provided with auxiliary components for venting. The auxiliary components include two T-shaped air cylinders 2. The top and rear sides of the air cylinders 2 are provided with through holes 3. The top of the air cylinders 2 is rotatably connected to an adjusting column 4. The top of the adjusting column 4 is provided with an air cavity 5. The top of the adjusting column 4 is provided with multiple air holes 6 communicating with the air cavity 5. The bottom of the adjusting column 4 is provided with a connecting hole 7 on one side corresponding to the air hole 6. The connecting hole 7 is connected to the air cavity 5. The top of the two adjusting columns 4 is fitted with synchronous pulleys 8, and the two synchronous pulleys 8 are driven by a synchronous belt 9.

[0016] The above-described mold body is used to process ultra-thin keycaps. The mold body includes a lower mold base 12 and an upper mold base 13 located on top of the base 1. The upper mold base 13 is located on top of the lower mold base 12, and an injection molding tube 14 is fixedly connected to the top of the upper mold base 13. The injection molding tube 14 is located inside the synchronous belt 9. A mounting hole 15 is opened on the side of the upper mold base 13 corresponding to the air cylinder 2. The air cylinder 2 and the adjusting column 4 are both located inside the mounting hole 15. The outer bottom end of the air cylinder 2 is fixed to the inner wall of the mounting hole 15, and the top end of the adjusting column 4 passes through the mounting hole 15 and extends to the top of the upper mold base 13. In this way, the upper mold base 13 can be placed on top of the lower mold base 12, and then the material can be transported through the injection molding tube 14 into the space formed by the upper mold base 13 and the lower mold base 12, which is convenient for processing ultra-thin keycaps.

[0017] To ensure the accuracy of the upper mold base 13's movement onto the lower mold base 12, two spaced guide posts 18 are installed at the top of each end of the base 1, and guide plates 19 are installed on both sides of the upper mold base 13, with the guide plates 19 fitted over the two guide posts 18. Thus, when the upper mold base 13 moves down onto the lower mold base 12, it can precisely fit onto the lower mold base 12 through the sliding connection between the guide plates 19 and the guide posts 18, thereby ensuring the stability of the upper mold base 13 during movement and preventing it from tilting or wobbling.

[0018] During injection molding, the gas between the upper mold base 13 and the lower mold base 12 needs to be discharged simultaneously. Therefore, a fixed bracket 17 is installed on the top of the upper mold base 13 on the side corresponding to the servo motor 16, and the servo motor 16 is mounted on the top of the fixed bracket 17. A servo motor 16 is also mounted on the top of one of the adjusting columns 4, and the output shaft of the servo motor 16 is fixed to the top of the adjusting column 4. In this way, the servo motor 16 drives one of the adjusting columns 4 to rotate, and the adjusting column 4, in turn, drives two synchronous pulleys 8 to rotate together via a synchronous belt 9. This causes the connecting holes 7 on the two adjusting columns 4 to align with the through holes 3, allowing the gas inside the upper mold base 13 and the lower mold base 12 to be discharged into the air cylinder 2 through the through holes 3, connecting holes 7, and air holes 6, thereby achieving exhaust treatment. After injection molding is completed, the synchronous belt 9 and the two synchronous pulleys 8 drive the two adjusting columns 4 to rotate synchronously, thereby causing the connecting hole 7 on the adjusting column 4 to be misaligned with the through hole 3, thus achieving the effect of sealing and closing the air cylinder 2.

[0019] Furthermore, to ensure smooth operation of the adjusting column 4, a fixed ring groove 10 is provided inside the bottom end of the adjusting column 4. A positioning ring 11 is provided inside the fixed ring groove 10, and the positioning ring 11 is sleeved on the outside of the air cylinder 2. In this way, the adjusting column 4 and the air cylinder 2 can be movably connected by the engagement of the positioning ring 11 and the fixed ring groove 10, thereby preventing the adjusting column 4 from rotating together with the air cylinder 2, and ensuring the stability and smoothness of the adjusting column 4 during operation.

[0020] In conclusion, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A micro-venting mold structure for molding ultra-thin keycaps, comprising a base (1) and a mold body disposed on top of the base (1), characterized in that: The mold body is equipped with auxiliary components for venting. The auxiliary component includes two T-shaped air cylinders (2). The air cylinders (2) have through holes (3) on both the front and rear sides of the top end. An adjusting column (4) is rotatably connected to the top end of the air cylinders (2). An air cavity (5) is opened inside the top end of the adjusting column (4), and multiple air holes (6) connected to the air cavity (5) are opened outside the top end of the adjusting column (4). A connecting hole (7) is opened on one side of the bottom end of the adjusting column (4) corresponding to the air hole (6), and the connecting hole (7) is connected to the air cavity (5). Both adjusting columns (4) are fitted with synchronous pulleys (8) on their top surfaces, and the two synchronous pulleys (8) are driven by a synchronous belt (9).

2. The micro-venting mold structure for ultra-thin keycap molding according to claim 1, characterized in that: The bottom end of the adjusting column (4) is provided with a fixed ring groove (10), and a positioning ring (11) is provided inside the fixed ring groove (10), and the positioning ring (11) is sleeved on the outside of the air cylinder (2).

3. The micro-venting mold structure for ultra-thin keycap molding according to claim 1, characterized in that: The mold body includes a lower mold base (12) and an upper mold base (13) located on the top of the base (1). The upper mold base (13) is located on the top of the lower mold base (12), and an injection tube (14) is fixedly connected to the top of the upper mold base (13). The injection tube (14) is located inside the synchronous belt (9). The upper mold base (13) has an installation hole (15) on the side corresponding to the air cylinder (2). The air cylinder (2) and the adjusting column (4) are both located inside the installation hole (15). The bottom of the air cylinder (2) is fixed to the inner wall of the installation hole (15), and the top of the adjusting column (4) passes through the installation hole (15) and extends to the top of the upper mold base (13).

4. The micro-venting mold structure for ultra-thin keycap molding according to claim 3, characterized in that: One of the adjustment columns (4) is equipped with a servo motor (16) at the top, and the output shaft of the servo motor (16) is fixed to the top of the adjustment column (4).

5. The micro-venting mold structure for ultra-thin keycap molding according to claim 4, characterized in that: A fixed bracket (17) is installed on the top of the upper mold base (13) on the side corresponding to the servo motor (16), and the servo motor (16) is installed on the top of the fixed bracket (17).

6. The micro-venting mold structure for ultra-thin keycap molding according to claim 3, characterized in that: The base (1) has two spaced guide posts (18) installed at the top of both ends, and guide plates (19) are installed on both sides of the upper mold base (13). The guide plates (19) are sleeved on the outside of the two guide posts (18).

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