Mold structure for injection molding of base shell

Abstract

The utility model relates to the technical field of injection molds, in particular to a mold structure for carrying out injection molding on a base shell, which comprises an ejector pin system, a pouring system, a mold core assembly and a slide assembly, the mold core assembly is provided with an upper mold core and a lower mold core, the upper mold core is provided with a top insert used for forming a top groove of a shell, the slide assembly is provided with a first slide, a second slide, a third slide and a fourth slide used for forming four side faces of the shell, the pouring system is provided with a main runner, a first underflow channel and a second underflow channel, the first underflow channel communicates with the main runner, and the second underflow channel communicates with the second underflow channel. The pouring device is arranged on the first slide and is used for pouring one end of the shell; and the second underflow channel is communicated with the main flow channel, is arranged at the third slide and is used for pouring the other end of the shell. In conclusion, glue is fed from the side face in a submersible mode through the slide, injection molding production is conducted on the base shell simply and conveniently, the production efficiency is improved, and the appearance face of the shell is more attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold structure for injection molding a base shell. Background Art

[0002] Molds are essential equipment in injection molding. Injection molding involves injecting hot-melt plastic material at high speed into a closed mold space with the desired shape. After the plastic material cools and solidifies, the mold is opened to eject the solidified plastic workpiece, resulting in a molded product.

[0003] The injection molding method is widely used in the field of plastic product manufacturing due to its low molding cost, short molding cycle, simple molding process and easy molding of plastic products with complex shapes. With the continuous improvement of scientific and technological level, people's requirements for product appearance quality have become more stringent.

[0004] Traditional injection molding technology generally uses side injection, but this affects the appearance of the product and requires manual removal of the sprue, which can easily damage the product. It also cannot be produced automatically, and the mold production cycle is long and the cost is high.

[0005] The glue feeding system is the most basic component of the injection mold, and the glue feeding position is the factor that most significantly affects the appearance, size and injection production of the injection molded parts.

[0006] The existing mold glue feeding structure is directly set on the outside of the slider. Such a design will leave glue injection marks on the surface of the product after molding, thereby affecting the appearance of the product.

[0007] For example, for shell plastic parts, if the top surface is the appearance surface and no glue entry point is allowed, and the surrounding areas are straight surfaces with no draft angle and require sliding positions on all four sides, it is necessary to design a simple and convenient mold structure that can dive the glue from the side through the sliding position to meet the product requirements. Utility Model Content

[0008] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0009] The utility model provides a mold structure for injection molding a base shell, comprising a pin system, a pouring system, and a mold core assembly and a slide assembly that cooperate with each other to form an injection molding cavity; the mold core assembly is provided with an upper mold core and a lower mold core, the upper mold core is provided with a top insert for forming a top groove of the shell, the slide assembly is provided with a first slide, a second slide, a third slide and a fourth slide for molding the four sides of the shell, the first slide and the third slide are respectively located at the two ends of the long side direction of the shell, the second slide and the fourth slide are respectively located on both sides of the short side direction of the shell, the pouring system is provided with a main channel, a first submerged flow channel and a second submerged flow channel, the first submerged flow channel is connected to the main channel, and is arranged at the first slide for pouring one end of the shell; the second submerged flow channel is connected to the main channel, and is arranged at the third slide for pouring the other end of the shell.

[0010] As a further solution of the present invention: the first row is provided with a first insert, a first inclined guide column, a first push rod and a first shovel base, and the first insert is provided with a first diving port at the end close to the injection cavity, and the first diving port is connected with the first submerged flow channel, so as to inject hot flow material into the injection cavity; the first insert is abutted against the first shovel base at the end away from the injection cavity, and the first insert is provided with a first inclined guide hole at the position corresponding to the first inclined guide column, and the first inclined guide hole and the first inclined guide column cooperate with each other to form a sliding connection; a first ejector pin is provided inside the first ejector pin, and the first ejector pin is used to eject the submerged material in the first submerged flow channel.

[0011] As a further solution of the present invention: a first protrusion is further provided on one end of the first insert close to the injection cavity, so as to form a first through hole at one end of the shell by injection molding.

[0012] As a further solution of the present invention: the second row position is provided with a second insert, a second inclined guide column and a second shovel base, and the second insert is provided with a second protrusion at the end close to the injection cavity, so as to form a second through hole on one side of the shell by injection molding; the second insert is abutted against the second shovel base at the end away from the injection cavity, and the second insert is provided with a second inclined guide hole at the position corresponding to the second inclined guide column, and the second inclined guide hole and the second inclined guide column cooperate with each other to form a sliding connection.

[0013] As a further solution of the present invention: the upper mold core is provided with an inclined guide groove, the top insert is passed through the inclined guide groove, and can move obliquely along the inclined guide groove to escape from the top groove of the base shell; the top insert is provided with an escape rod at one end away from the injection cavity, and the escape rod is transmission-connected to the top insert, thereby driving the top insert to move obliquely along the inclined guide groove for a certain distance.

[0014] As a further solution of the present invention: a passive hook is provided at one end of the top insert close to the ejection rod, and an active hook is provided at one end of the ejection rod corresponding to the passive hook, and the passive hook and the active hook cooperate with each other to form a transmission connection.

[0015] As a further solution of the present invention: a limiting step is further provided at one end of the top insert away from the injection cavity, and a limiting protrusion is provided at a position of the upper mold core corresponding to the limiting step, so that after the top insert moves obliquely along the inclined guide groove for a certain distance, its limiting step abuts against the limiting protrusion.

[0016] As a further solution of the present invention: the side wall of the injection molding cavity formed by the top insert is provided with a top ridge, and the top ridge is used for injection molding to form a long groove on the inner side wall of the shell.

[0017] As a further solution of the present invention: the ejector system is provided with an inclined ejector column and an inclined ejector, one end of the inclined ejector is provided with a third protrusion for injection molding a third through hole in the long groove, the other end of the inclined ejector is provided with an inclined slider, and the end of the inclined ejector column corresponding to the inclined slider is provided with an inclined slide rail, the inclined slide rail and the inclined slider cooperate with each other to make the inclined ejector slidably connected to the inclined guide column.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting corresponding slide structures at both ends of the long side of the base shell, and setting the corresponding submerged flow channel inside the slide structure, the submerged port is used to inject glue on the non-appearance surface of the shell, thereby avoiding the occurrence of glue entry points on the appearance surface and making the appearance surface meet production requirements.

[0020] 2. The first ejector rod and the first ejector pin are provided to eject the neoprene material, so that the neoprene material can be matched with the first insert to perform corresponding repeated injection molding operations, thereby improving the injection molding efficiency.

[0021] 3. By setting the oblique guide groove and the top insert, the top groove of the base shell is formed by injection molding. At the same time, the top convex strip of the top insert can be used to form a long groove on the inner wall of the shell, so that the shell meets the preset injection molding requirements.

[0022] Therefore, after the above improvements, the utility model can provide a mold structure for injection molding the base shell, which can inject glue from the side through the slide, and can simply and conveniently perform injection molding on the base shell, thereby improving production efficiency and making the appearance of the shell more beautiful.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 This is a structural diagram of the mold core assembly and the slide assembly of the utility model;

[0026] Figure 2 It is a cross-sectional schematic diagram of the first row position and the base housing of the utility model;

[0027] Figure 3 This is a structural diagram of the first row and main channel of the utility model;

[0028] Figure 4 This is a schematic structural diagram of the second row position of the utility model;

[0029] Figure 5 It is a cross-sectional schematic diagram of the top insert of the utility model;

[0030] Figure 6 It is a structural diagram of the top convex strip of the utility model;

[0031] Figure 7 This is a schematic structural diagram of the inclined ejector column and the inclined ejector pin of the utility model;

[0032] Figure 8 It is a structural schematic diagram of the base shell of the utility model.

[0033] The reference numerals and names in the figures are as follows:

[0034] 10 base shell; 11 top groove; 12 first through hole; 13 second through hole; 14 long groove; 15 third through hole; 20 ejector system; 21 inclined ejector column; 22 inclined slide rail; 23 inclined ejector pin; 24 third protrusion; 25 inclined slide; 30 casting system; 31 main channel; 32 first submerged flow channel; 33 second submerged flow channel; 34 diving material; 40 mold core assembly; 41 lower mold core; 42 upper mold core; 43 inclined guide groove; 44 limiting protrusion; 50 ejector 1. The top insert; 51. The top convex strip; 52. The passive hook; 53. The limiting step; 54. The release rod; 55. The active hook; 60. The slide assembly; 61. The third slide; 62. The fourth slide; 70. The first slide; 71. The first oblique guide column; 72. The first shovel base; 73. The first insert; 74. The first diving port; 75. The first protrusion; 76. The first ejector rod; 77. The first ejector pin; 80. The second slide; 81. The second oblique guide column; 82. The second shovel base; 83. The second insert; 84. The second protrusion. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1 to 8 In an embodiment of the present invention, a mold structure for injection molding a base shell 10 includes an ejector system 20, a pouring system 30, and a mold core assembly 40 and a slide assembly 60 that cooperate with each other to form an injection molding cavity; the mold core assembly 40 includes an upper mold core 42 and a lower mold core 41, the upper mold core 42 is provided with a top insert 50 for forming the top groove 11 of the shell, and the slide assembly 60 includes a first slide 70, a second slide 80, a third slide 61 and a fourth slide 62 for molding the four side surfaces of the shell. The first row position 70 and the third row position 61 are respectively located at the two ends of the long side direction of the shell, and the second row position 80 and the fourth row position 62 are respectively located on both sides of the short side direction of the shell. The casting system 30 is provided with a main channel 31, a first submerged flow channel 32 and a second submerged flow channel 33. The first submerged flow channel 32 is connected to the main channel 31 and is arranged at the first row position 70 for casting one end of the shell; the second submerged flow channel 33 is connected to the main channel 31 and is arranged at the third row position 61 for casting the other end of the shell.

[0037] Specifically, since a top groove 11 is provided on the upper part of the base shell 10, and the top groove 11 is used to place other electronic products, in order to avoid friction with other electronic products or affecting the overall aesthetics, the side walls of the top groove 11 should not be provided with glue injection ports. There will be traces of glue on the surface of the product, which will affect the appearance of the product.

[0038] Secondly, by setting corresponding sliding structures at both ends of the long side direction of the base shell 10, and setting the corresponding submerged flow channel inside the sliding structure, the submerged port is used to inject glue on the non-exterior surface of the shell, thereby avoiding the appearance of glue points on the exterior surface and making the exterior surface meet production requirements.

[0039] like Figure 2 and Figure 3As shown, preferably, the first row position 70 is provided with a first insert 73, a first inclined guide column 71, a first push rod 76 and a first shovel base 72, and the first insert 73 is provided with a first diving port 74 at the end close to the injection cavity, and the first diving port 74 is connected with the first submerged flow channel 32, so as to inject hot flow material into the injection cavity; the first insert 73 is abutted against the first shovel base 72 at the end away from the injection cavity, and the first insert 73 is provided with a first inclined guide hole at the position corresponding to the first inclined guide column 71, and the first inclined guide hole cooperates with the first inclined guide column 71 to form a sliding connection; the first push rod 76 is provided with a first ejector pin 77, and the first ejector pin 77 is used to eject the submerged material 34 in the first submerged flow channel 32.

[0040] Specifically, during mold opening, the inclined guide pillars exert a driving force on the first insert 73, moving it away from the injection cavity and causing it to retreat a certain distance. This separates the first submersible port 74 from the injection cavity and breaks the submersible material 34 within the first submersible channel 32. Subsequently, the first ejector pin 77 within the first ejector pin 76, driven by the ejector system 20, ejects the submersible material 34, causing it to detach from the first submersible channel 32 and fall. The shovel base abuts against the insert, maintaining its preset position.

[0041] Secondly, since both ends of the base housing 10 have the same structure, the third row 61 can be provided with the same structure and components as the first row 70 for injection molding.

[0042] like Figure 3 As shown, preferably, a first protrusion 75 is further provided at one end of the first insert 73 close to the injection cavity, so as to form the first through hole 12 at one end of the housing by injection molding.

[0043] Specifically, since a plurality of first through holes 12 are respectively provided at both ends of the base shell 10 , a corresponding plurality of first protrusions 75 can be provided on the first insert 73 to form the corresponding first through holes 12 .

[0044] like Figure 4 As shown, preferably, the second row position 80 is provided with a second insert 83, a second inclined guide column 81 and a second shovel base 82, and the second insert 83 is provided with a second protrusion 84 at the end close to the injection cavity, so as to form a second through hole 13 on one side of the shell by injection molding; the second insert 83 is abutted against the second shovel base 82 at the end away from the injection cavity, and the second insert 83 is provided with a second inclined guide hole at the position corresponding to the second inclined guide column 81, and the second inclined guide hole and the second inclined guide column 81 cooperate with each other to form a sliding connection.

[0045] Specifically, similarly, the second inclined guide post 81 and the second inclined guide hole cooperate with each other to drive the movement of the second insert 83. Since both sides of the base shell 10 have similar structures, the fourth row 62 can also be set to the second row 80 with similar structures and components for injection molding operations.

[0046] like Figure 5 and Figure 6 As shown, preferably, the upper mold core 42 is provided with an inclined guide groove 43, the top insert 50 is passed through the inclined guide groove 43, and can move obliquely along the inclined guide groove 43 to escape from the top groove 11 of the base shell 10; the top insert 50 is provided with an escape rod 54 at one end away from the injection cavity, and the escape rod 54 is transmission-connected to the top insert 50, thereby driving the top insert 50 to move obliquely along the inclined guide groove 43 for a certain distance.

[0047] Specifically, since a top groove 11 is provided on the upper portion of the base shell 10, a corresponding top insert 50 can be provided for molding the top insert 50. In order to move the top insert 50, a corresponding ejection rod 54 can be provided, and the top insert 50 can be moved by driving the ejection rod 54 when the mold is opened or closed.

[0048] like Figure 5 As shown, preferably, a passive hook 52 is provided at one end of the top insert 50 close to the ejection rod 54, and an active hook 55 is provided at one end of the ejection rod 54 corresponding to the passive hook 52, and the passive hook 52 and the active hook 55 cooperate with each other to form a transmission connection.

[0049] Specifically, during mold opening or closing, the mold moves vertically, usually up and down. However, since the top insert 50 needs to move diagonally a certain distance, a special structure is required to ensure that the vertical movement of the ejection rod 54 can also drive the diagonal movement of the top insert 50. A relatively loose transmission connection structure, such as a hook-shaped connection structure, can be used to transmit the vertical movement power of the ejection rod 54 to the top insert 50 without hindering its diagonal movement.

[0050] like Figure 6 As shown, preferably, the top insert 50 is further provided with a limiting step 53 at one end away from the injection cavity, and the upper mold core 42 is provided with a limiting protrusion 44 at a position corresponding to the limiting step 53, so that after the top insert 50 moves obliquely along the oblique guide groove 43 for a certain distance, its limiting step 53 abuts against the limiting protrusion 44.

[0051] Specifically, after the top insert 50 moves obliquely for a certain distance, it can be driven by the limiting protrusion 44 of the upper mold core 42 to move in the corresponding vertical direction to perform a normal demoulding operation.

[0052] like Figure 6As shown, preferably, the side wall of the injection cavity formed by the top insert 50 is provided with a top ridge 51, and the top ridge 51 is used for injection molding to form the long groove 14 on the inner wall of the shell.

[0053] Specifically, since the side wall of the upper side of the base shell 10 is further provided with a long groove 14 , the corresponding long groove 14 can be formed by providing a corresponding top ridge 51 on the top insert 50 .

[0054] like Figure 7 As shown, preferably, the ejector system 20 is provided with an inclined ejector column 21 and an inclined ejector pin 23, one end of the inclined ejector pin 23 is provided with a third boss 24 for injection molding the third through hole 15 in the long groove 14, the other end of the inclined ejector pin 23 is provided with an inclined slider 25, and the inclined ejector column 21 is provided with an inclined slide rail 22 at one end corresponding to the inclined slider 25, and the inclined slide rail 22 cooperates with the inclined slider 25 to make the inclined ejector pin 23 slidably connected to the inclined guide column.

[0055] Specifically, since the third through hole 15 is further provided at the position of the long groove 14 of the base shell 10 , corresponding inclined ejector columns 21 and inclined ejector pins 23 may be provided to cooperate with each other, thereby forming the corresponding third through hole 15 .

[0056] It is understandable that the mold structure can also be equipped with other matching devices in the prior art to form a complete injection mold, such as an upper mold plate, a lower mold plate, and other devices.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A mold structure for injection molding a base shell, characterized in that: The invention comprises an ejector pin system (20), a casting system (30), and a mold core assembly (40) and a slide assembly (60) which cooperate with each other to form an injection molding cavity; the mold core assembly (40) is provided with an upper mold core (42) and a lower mold core (41); the upper mold core (42) is provided with a top insert (50) for forming a top groove (11) of a shell; the slide assembly (60) is provided with a first slide (70), a second slide (80), a third slide (61) and a fourth slide (62) for molding four sides of the shell; the first slide (70) and the second slide (80) are provided with a first slide (70), a second slide (80), a third slide (61) and a fourth slide (62) for molding four sides of the shell; The three rows (61) are respectively located at the two ends of the long side of the shell, the second row (80) and the fourth row (62) are respectively located at the two sides of the short side of the shell, and the casting system (30) is provided with a main channel (31), a first submerged flow channel (32) and a second submerged flow channel (33), the first submerged flow channel (32) is connected to the main channel (31), and is arranged at the first row (70) for casting one end of the shell; the second submerged flow channel (33) is connected to the main channel (31), and is arranged at the third row (61) for casting the other end of the shell.

2. A mold structure for injection molding a base shell according to claim 1, characterized in that: The first row position (70) is provided with a first insert (73), a first inclined guide column (71), a first push rod (76) and a first shovel base (72); the first insert (73) is provided with a first diving port (74) at one end close to the injection cavity, and the first diving port (74) is connected to the first submerged flow channel (32), so as to inject hot flow material into the injection cavity; the first insert (73) is abutted against the first shovel base (72) at one end away from the injection cavity, and the first insert (73) is provided with a first inclined guide hole at a position corresponding to the first inclined guide column (71), and the first inclined guide hole cooperates with the first inclined guide column (71) to form a sliding connection; the first push rod (76) is provided with a first ejector pin (77) inside, and the first ejector pin (77) is used to eject the submerged material (34) in the first submerged flow channel (32).

3. The mold structure for injection molding a base shell according to claim 2, characterized in that: A first protrusion (75) is also provided at one end of the first insert (73) close to the injection cavity, thereby forming a first through hole (12) at one end of the housing by injection molding.

4. The mold structure for injection molding a base shell according to claim 1, characterized in that: The second row position (80) is provided with a second insert (83), a second inclined guide column (81) and a second shovel base (82); the second insert (83) is provided with a second protruding column (84) at one end close to the injection cavity, thereby forming a second through hole (13) on one side of the shell by injection molding; the second insert (83) is abutted against the second shovel base (82) at one end away from the injection cavity, and the second insert (83) is provided with a second inclined guide hole at a position corresponding to the second inclined guide column (81); the second inclined guide hole and the second inclined guide column (81) cooperate with each other to form a sliding connection.

5. The mold structure for injection molding a base shell according to claim 1, characterized in that: The upper mold core (42) is provided with an oblique guide groove (43), and the top insert (50) is inserted into the oblique guide groove (43) and can move obliquely along the oblique guide groove (43) to escape from the top groove (11) of the base shell (10); an escape rod (54) is provided at one end of the top insert (50) away from the injection cavity, and the escape rod (54) is transmission-connected to the top insert (50), thereby driving the top insert (50) to move obliquely along the oblique guide groove (43) for a certain distance.

6. The mold structure for injection molding a base shell according to claim 5, characterized in that: A passive hook (52) is provided at one end of the top insert (50) close to the ejection rod (54), and an active hook (55) is provided at one end of the ejection rod (54) corresponding to the passive hook (52). The passive hook (52) and the active hook (55) cooperate with each other to form a transmission connection.

7. The mold structure for injection molding a base shell according to claim 1, characterized in that: The top insert (50) is further provided with a limiting step (53) at one end away from the injection cavity, and the upper mold core (42) is provided with a limiting protrusion (44) at a position corresponding to the limiting step (53), so that after the top insert (50) moves obliquely along the oblique guide groove (43) for a certain distance, its limiting step (53) abuts against the limiting protrusion (44).

8. The mold structure for injection molding a base shell according to claim 1, characterized in that: The top insert (50) forms a side wall of the injection molding cavity and is provided with a top convex strip (51), and the top convex strip (51) is used for injection molding to form a long groove (14) on the inner side wall of the shell.

9. The mold structure for injection molding a base shell according to claim 1, characterized in that: The ejector system (20) is provided with an inclined ejector column (21) and an inclined ejector pin (23), one end of the inclined ejector pin (23) is provided with a third protrusion (24) for injection molding a third through hole (15) in the long groove (14), the other end of the inclined ejector pin (23) is provided with an inclined slider (25), and the end of the inclined ejector column (21) corresponding to the inclined slider (25) is provided with an inclined slide rail (22), the inclined slide rail (22) and the inclined slider (25) cooperate with each other, so that the inclined ejector pin (23) is slidably connected to the inclined guide column.

Images