Flat plate shell mold core structure for improving exhaust

Abstract

The utility model discloses a flat plate shell mold core structure for improving exhaust, which comprises a mold core body with a forming cavity, a plurality of mounting holes penetrating through the upper surface and the lower surface of the mold core body are formed in the bottom wall of the forming cavity, inserts are embedded in the mounting holes, and each mounting hole comprises a first hole section, a second hole section and a third hole section which are connected in sequence. The insert comprises a first rod section, a second rod section and a third rod section which are sequentially connected, and a forming groove is defined between the first hole section and the first rod section. By arranging the first air guide groove, the second air guide groove and the third air guide groove, air in the forming groove is guided out to the second air guide groove through the first air guide groove and is exhausted out of the mold core body through the third air guide groove, so that the air trapping phenomenon is avoided, and compared with a straight hole in the prior art, the annular groove is not prone to being blocked, so that the mold core is convenient to use. And gas can be completely discharged, the product yield is improved, and meanwhile, the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a flat shell mold core structure for improving venting. Background Technology

[0002] Injection molds are frequently used in the production of mobile phones and tablets. Injection molding is a molding method that combines injection and molding. Its main advantages are high production speed, high efficiency, automated operation, precise dimensional accuracy, and the ability to form complex shapes, making it suitable for mass production.

[0003] During the injection molding process of mobile phone or tablet casings, it is often necessary to expel the gas from the molded part; otherwise, "air trapping" will occur, which has always been a difficult technical problem to solve in the injection mold industry. The structure of the camera area on mobile phone or tablet casings is relatively complex, making it more prone to air trapping. Existing injection mold cores lack venting structures within the molding groove, preventing complete gas expulsion during injection. This results in air trapping in the shape of the camera area on mobile phone or tablet casings, causing defects in the product's appearance, reducing yield, and impacting production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a mold core structure for a flat panel shell that improves venting, in order to solve the problem mentioned in the background art that the gas in the molding groove of the existing injection mold cannot be completely discharged, which leads to the problem that the shape of the camera position of the mobile phone or tablet shell product is prone to air entrapment.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flat shell mold core structure for improving exhaust includes a mold core body with a molding cavity. The bottom wall of the molding cavity has a plurality of mounting holes penetrating the upper and lower surfaces of the mold core body. An insert is embedded in the mounting hole. The mounting hole includes a first hole segment, a second hole segment, and a third hole segment connected in sequence. The insert includes a first rod segment, a second rod segment, and a third rod segment connected in sequence. A molding groove is formed between the first hole segment and the first rod segment. The side wall of the second hole segment has a plurality of first air guide grooves distributed circumferentially in the vertical direction. The bottom wall of the second hole segment has a plurality of second air guide grooves communicating with the first air guide grooves in the horizontal direction. The side wall of the third hole segment has a plurality of third air guide grooves communicating with the second air guide grooves in the vertical direction.

[0007] Preferably, an annular groove is provided at the connection between the second hole segment and the third hole segment, which connects the second air guide groove and the third air guide groove. The annular groove is ring-shaped and surrounds the connection between the second rod segment and the third rod segment.

[0008] Preferably, the inner diameters of the first hole segment, the second hole segment, and the third hole segment decrease sequentially, and the outer diameters of the first rod segment, the second rod segment, and the third rod segment decrease sequentially.

[0009] Preferably, a first exhaust channel is formed between the first air guide groove, the second air guide groove and the peripheral wall of the second rod segment, and a second exhaust channel is formed between the third air guide groove and the peripheral wall of the third rod segment.

[0010] Preferably, the connection between the forming groove and the second hole section is provided with a first inclined surface in an annular shape, and a plurality of fourth air guide grooves distributed circumferentially are provided on the first inclined surface.

[0011] Preferably, a second inclined surface in the shape of an annular shape is provided at the connection between the first rod segment and the second rod segment, and an exhaust gap is formed between the plurality of fourth air guide grooves and the second inclined surface to allow gas in the forming groove to be discharged, and the exhaust gap is connected to the first air guide groove.

[0012] Preferably, the angle between the first inclined plane, the second inclined plane and the horizontal plane is in the range of 30° to 60°.

[0013] Preferably, the third rod segment has an insertion hole that penetrates its outer peripheral wall, and a pin is inserted into the insertion hole, the pin abutting against the bottom surface of the mold core body.

[0014] Preferably, the third hole segment has a first plane along the length of the hole, and the third rod segment has a second plane that abuts against the first plane along the length of the rod.

[0015] Preferably, the longitudinal section of the first air guide groove and the second air guide groove is rectangular, and the cross section of the third air guide groove is crescent-shaped.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By setting a first air guide groove, a second air guide groove, and a third air guide groove, the gas in the molding groove is guided through the first air guide groove to the second air guide groove, and then discharged to the outside of the mold core body through the third air guide groove, thereby avoiding the phenomenon of trapped air. Moreover, the annular groove is less prone to clogging than the straight hole of the prior art, which helps the gas to be completely discharged, improves the exhaust structure, avoids defects in the product during injection molding in the molding groove, improves the product yield, and helps to improve production efficiency.

[0018] 2. The third rod section has an insertion hole that penetrates its outer peripheral wall. A pin is inserted into the insertion hole and abuts against the bottom surface of the mold core body. The diameter of the insertion hole decreases from one end of the third rod section to the other end to facilitate the insertion of the pin. The pin is used to limit the position of the insert and prevent the insert from moving up and down in the mounting hole, thus ensuring the injection molding quality of the flat shell.

[0019] 3. The third hole section has a first plane along the length of the hole, and the third rod section has a second plane along the length of the rod that abuts against the first plane. The first plane and the second plane cooperate with each other to restrict the insert from rotating in the mounting hole, so as to ensure the injection molding quality of the flat shell. Attached Figure Description

[0020] Figure 1 This is a perspective view of a flat shell mold core structure for improving exhaust according to the present invention, with a flat shell mounted on it.

[0021] Figure 2 This is a perspective view of the mold core structure for improving exhaust in this utility model when the flat shell is not loaded.

[0022] Figure 3 This is an exploded view of the mold core structure of a flat shell for improving exhaust according to the present invention;

[0023] Figure 4 This is a perspective view of the insert of this utility model;

[0024] Figure 5 This is a perspective view of the mold core body of this utility model;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 This is a bottom view of a flat shell mold core structure for improving exhaust according to the present invention;

[0027] Figure 8 for Figure 7 Sectional view of mid-section AA;

[0028] Figure 9 for Figure 8 Enlarged view at point D;

[0029] Figure 10 for Figure 7 A magnified view of point C in the middle.

[0030] In the diagram: 1. Mold core body; 2. Flat shell; 3. Mounting hole; 31. First hole section; 32. Second hole section; 321. First air guide groove; 322. Second air guide groove; 33. Third hole section; 331. Third air guide groove; 332. First plane; 4. Insert; 41. First rod section; 411. Protrusion; 42. Second rod section; 43. Third rod section; 431. Second plane; 432. Insertion hole; 5. Annular groove; 6. First inclined surface; 61. Fourth air guide groove; 7. Second inclined surface; 8. Exhaust gap; 9. Pin; 10. Molding groove. Detailed Implementation

[0031] 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.

[0032] Please see Figure 1-4 A mold core structure for improving venting of a flat shell includes a mold core body 1 with a molding cavity, in which a flat shell 2 is injection molded. The bottom wall of the molding cavity has several mounting holes 3 penetrating the upper and lower surfaces of the mold core body 1. Inserts 4 are embedded in the mounting holes 3, and the inserts 4 cooperate with the molding cavity to form the flat shell 2 during injection molding. Simultaneously, the inserts 4 are used to vent gases generated during the injection molding process.

[0033] Please see Figure 4-9 The mounting hole 3 includes a first hole segment 31, a second hole segment 32, and a third hole segment 33 connected in sequence. The insert 4 includes a first rod segment 41, a second rod segment 42, and a third rod segment 43 connected in sequence. A forming groove 10 is formed between the first hole segment 31 and the first rod segment 41. The side wall of the second hole segment 32 has several circumferentially distributed first air guide grooves 321 vertically distributed. The bottom wall of the second hole segment 32 has several second air guide grooves 322 communicating with the first air guide grooves 321 horizontally distributed. The side wall of the third hole segment 33 has several third air guide grooves 331 communicating with the second air guide grooves 322 vertically distributed. An annular groove 5 is provided at the connection between the second hole segment 32 and the third hole segment 33, connecting the second air guide grooves 322 and the third air guide grooves 331. The annular groove 5 is ring-shaped and surrounds the connection between the second rod segment 42 and the third rod segment 43. The third air guide groove 331 extends to the bottom surface of the mold core body 1.

[0034] By setting the first air guide groove 321, the second air guide groove 322, and the third air guide groove 331, the gas in the molding groove 10 is guided through the first air guide groove 321 to the second air guide groove 322, and then discharged to the outside of the mold core body 1 through the third air guide groove 331, thereby avoiding the phenomenon of trapped air. Moreover, the annular groove 5 is less prone to clogging than the straight holes of the prior art, which helps the gas to be completely discharged, improves the exhaust structure, avoids defects in the product during injection molding in the molding groove 10, improves the product yield, and helps to improve production efficiency.

[0035] Please see Figure 9In this embodiment, the connection between the second hole segment 32 and the third hole segment 33 is stepped, as is the connection between the second rod segment 42 and the third rod segment 43. The inner diameters of the first hole segment 31, the second hole segment 32, and the third hole segment 33 decrease sequentially, as do the outer diameters of the first rod segment 41, the second rod segment 42, and the third rod segment 43. A first exhaust channel is formed between the first air guide groove 321, the second air guide groove 322, and the peripheral wall of the second rod segment 42, and a second exhaust channel is formed between the third air guide groove 331 and the peripheral wall of the third rod segment 43.

[0036] Please see Figure 9 and Figure 10 In this embodiment, the longitudinal sections of the first air guide groove 321 and the second air guide groove 322 are rectangular, and the cross-section of the third air guide groove 331 is crescent-shaped. However, this utility model does not impose restrictions on the cross-sections of the first air guide groove 321, the second air guide groove 322, and the third air guide groove 331. The longitudinal sections of the first air guide groove 321 and the second air guide groove 322 can be circular, wedge-shaped, trapezoidal, or other structures, and the cross-section of the third air guide groove 331 can also be circular, wedge-shaped, trapezoidal, or other structures.

[0037] Please see Figure 6 and Figure 9 A first, annular inclined surface 6 is provided at the connection between the forming groove 10 and the second hole segment 32. A plurality of fourth air guide grooves 61 arranged circumferentially are provided on the first inclined surface 6. A second, annular inclined surface 7 is provided at the connection between the first rod segment 41 and the second rod segment 42. An exhaust gap 8 is formed between the plurality of fourth air guide grooves 61 and the second inclined surface 7 to allow gas to exit from the forming groove 10. The exhaust gap 8 communicates with the first air guide groove 321. In this embodiment, the angle between the first inclined surface 6, the second inclined surface 7, and the horizontal plane ranges from 30° to 60°.

[0038] Please see Figure 3-4 and Figure 8 The third rod segment 43 has an insertion hole 432 that penetrates its outer peripheral wall. A pin 9 is inserted into the insertion hole 432 and abuts against the bottom surface of the mold core body 1. In this embodiment, the diameter of the insertion hole 432 decreases sequentially from one end of the third rod segment 43 to the other end to facilitate the insertion of the pin 9. The pin 9 is used to limit the insert 4 and prevent the insert 4 from moving up and down in the mounting hole 3, thus ensuring the injection molding quality of the flat shell 2.

[0039] Please see Figure 4 , Figure 6-7 and Figure 10The third hole segment 33 has a first plane 332 along its length, and the third rod segment 43 has a second plane 431 that abuts against the first plane 332 along its length. The first plane 332 and the second plane 431 cooperate to restrict the insert 4 from rotating within the mounting hole 3, thereby ensuring the injection molding quality of the flat shell 2. Please refer to... Figure 10 The first plane 332 and the third air guide groove 331 are arranged adjacent to each other.

[0040] Please see Figure 9 The top surface of the first rod segment 41 has a protrusion 411 in the middle for injection molding in conjunction with the molding cavity.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flat shell mold core structure for improving venting, comprising a mold core body (1) having a molding cavity, characterized in that: The bottom wall of the molding cavity is provided with a plurality of mounting holes (3) penetrating the upper and lower surfaces of the mold core body (1). An insert (4) is embedded in the mounting hole (3). The mounting hole (3) includes a first hole segment (31), a second hole segment (32), and a third hole segment (33) connected in sequence. The insert (4) includes a first rod segment (41), a second rod segment (42), and a third rod segment (43) connected in sequence. A molding groove (10) is formed between the first hole segment (31) and the first rod segment (41). The side wall of the second hole segment (32) is provided with a plurality of first air guide grooves (321) distributed circumferentially in the vertical direction. The bottom wall of the second hole segment (32) is provided with a plurality of second air guide grooves (322) communicating with the first air guide grooves (321) in the horizontal direction. The side wall of the third hole segment (33) is provided with a plurality of third air guide grooves (331) communicating with the second air guide grooves (322) in the vertical direction.

2. The flat shell mold core structure for improving exhaust as described in claim 1, characterized in that: An annular groove (5) connecting the second hole segment (32) and the third hole segment (33) is provided at the connection point. The annular groove (5) is ring-shaped and surrounds the connection point between the second rod segment (42) and the third rod segment (43).

3. The flat shell mold core structure for improving exhaust as described in claim 1, characterized in that: The inner diameters of the first hole segment (31), the second hole segment (32), and the third hole segment (33) decrease sequentially, and the outer diameters of the first rod segment (41), the second rod segment (42), and the third rod segment (43) decrease sequentially.

4. The flat shell mold core structure for improving exhaust as described in claim 1, characterized in that: A first exhaust channel is formed between the first air guide groove (321), the second air guide groove (322) and the peripheral wall of the second rod segment (42), and a second exhaust channel is formed between the third air guide groove (331) and the peripheral wall of the third rod segment (43).

5. The flat shell mold core structure for improving exhaust as described in claim 1, characterized in that: The connection between the forming groove (10) and the second hole section (32) is provided with a first inclined surface (6) in an annular shape, and a plurality of fourth air guide grooves (61) distributed in a circumferential direction are provided on the first inclined surface (6).

6. The flat shell mold core structure for improving exhaust as described in claim 5, characterized in that: A second inclined surface (7) in the shape of an annular shape is provided at the connection between the first rod segment (41) and the second rod segment (42). An exhaust gap (8) is formed between the fourth air guide groove (61) and the second inclined surface (7) to allow the gas in the forming groove (10) to be discharged. The exhaust gap (8) is connected to the first air guide groove (321).

7. The flat shell mold core structure for improving exhaust as described in claim 6, characterized in that: The angle between the first inclined plane (6), the second inclined plane (7) and the horizontal plane is in the range of 30° to 60°.

8. The improved exhaust plate housing core structure according to any one of claims 1-7, characterized in that: The third rod segment (43) has an insertion hole (432) that penetrates its outer peripheral wall. A pin (9) is inserted into the insertion hole (432) and the pin (9) abuts against the bottom surface of the mold core body (1).

9. The improved exhaust plate housing core structure according to any one of claims 1-7, characterized in that: The third hole segment (33) has a first plane (332) along the length of the hole wall, and the third rod segment (43) has a second plane (431) along the length of the rod that abuts against the first plane (332).

10. The flat shell mold core structure for improving exhaust according to any one of claims 1-7, characterized in that: The longitudinal section of the first air guide groove (321) and the second air guide groove (322) is rectangular, and the cross section of the third air guide groove (331) is crescent-shaped.

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