A multifunctional injection mold

Abstract

The present application relates to the technical field of injection molds, and specifically to a multifunctional injection mold, including a die and a punch opposite to the die, the die being provided with a casting cavity for forming a plastic part, the punch being provided with a punch output end for extending into the casting cavity and cooperating with the casting cavity to form a mold cavity of a final shape of the plastic part, the punch being provided with a main flow channel for connecting to an injection molding device, the die being provided with a replacement structure for replacing the casting cavity, and the punch being provided with a disassembly structure for replacing the punch output end, so that the factory only needs to replace the die and parts on the punch to process new plastic parts, thereby saving production costs and allowing the punch and die to continue working by replacing the casting platform and the punch output end when the punch and die are worn, thereby improving the service life of the punch and die.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to a multifunctional injection mold. Background Art

[0002] The injection mold, whose specific structure includes a fixed mold base, a movable mold base, a concave mold arranged on the fixed mold base or the movable mold base, and a convex mold arranged on the fixed mold base or the movable mold base. The concave mold is provided with a casting cavity for forming a plastic part, and the convex mold is provided with an output end of the mold cavity for extending into the casting cavity and cooperating with the casting cavity to form the final shape of the plastic part. The concave mold or the convex mold is provided with a main channel for connecting to an injection molding device, pushing the movable mold base to make the convex mold and the concave mold close together to form a mold cavity, and then using the injection molding device to inject plastic fluid into the mold cavity through the main channel to form a plastic part.

[0003] However, for plastic parts of different shapes, casting requires the cooperation of concave dies and convex dies of different shapes. This means that after a batch of plastic parts are processed in the factory, the entire injection mold on the injection molding device needs to be replaced. This means that after the factory needs to process new plastic parts, it needs to customize a whole set of molds for the new plastic parts, which greatly increases the production cost. Therefore, a multifunctional injection mold is needed. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a multifunctional injection mold to solve the technical problem in the prior art that processing new plastic parts requires replacing the entire set of molds, resulting in excessive production costs.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions: a multifunctional injection mold, including a concave mold and a convex mold opposite to the concave mold, the concave mold is provided with a casting cavity for forming a plastic part, the convex mold is provided with a convex mold output end of the mold cavity for extending into the casting cavity and cooperating with the casting cavity to form the final shape of the plastic part, the convex mold is provided with a main channel for connecting to an injection molding device, the concave mold is provided with a replacement structure for replacing the casting cavity, and the convex mold is provided with a disassembly structure for replacing the convex mold output end.

[0006] Furthermore, the replacement structure includes a mounting groove opened on the die and a casting platform installed in the mounting groove, the casting cavity is opened on the casting platform, a fixing structure for fixing the casting platform is provided in the mounting groove, and a connecting piece for cooperating with the fixing structure is provided on the bottom surface of the casting platform.

[0007] Furthermore, the disassembly structure includes a mounting hole provided on the punch and a disassembly column installed in the mounting hole, the output end of the punch is threadedly connected to the disassembly column, and a fixing device for fixing the disassembly column is provided in the mounting hole.

[0008] By adopting the above technical solution, when it is necessary to process a new plastic part, it is only necessary to pre-process the casting cavity of the new plastic part on the casting platform, unlock the fixation of the disassembly column by the fixing device, unscrew the punch output end on the disassembly column and replace it with the punch output end of the new plastic part, then install the disassembly column on the punch through the mounting hole and fix the disassembly column with the fixing device, then install the casting platform of the new plastic part in the mounting groove, and use the fixing structure to fix the casting platform through the connecting piece, so that the mold cavity is in the shape of the new plastic part when the die and the punch are combined, so that the factory only needs to replace the casting platform and the punch output end to process the new plastic part, which saves production costs and can also make the punch and the die continue to work by replacing the casting platform and the punch output end when the punch and the die are worn, thereby improving the service life of the punch and the die.

[0009] Furthermore, the connecting piece is provided with a plurality of connecting pieces evenly distributed on the bottom surface of the casting platform, the connecting piece is a column, and an end away from the casting platform is provided with an internal thread.

[0010] Furthermore, the fixing structure includes a plurality of fixing holes located in the mounting groove and passing through the bottom surface of the die, and fixing bolts extending into the fixing holes and threadedly connected to the connecting piece. The fixing holes are opened in the die, and a flange with a diameter larger than the fixing hole is fixed on one end of the fixing bolt away from the connecting piece.

[0011] By adopting the above technical solution, when the casting platform is placed in the installation groove, the connecting piece extends into the fixing hole. At this time, the fixing bolt is aligned with the internal thread of the connecting piece and screwed in, so that the fixing bolt is threadedly connected to the connecting piece to fix the casting platform.

[0012] Furthermore, the fixing device includes a fixing plate fixedly arranged on the end face of the disassembly column away from the output end of the punch, a fixing screw hole opened on the fixing plate, and a fixing stud located on one side of the punch and inserted into the punch and extending into the mounting hole. The fixing stud is threadedly connected to the fixing plate, and a plurality of fixing screw holes are opened and arranged along the length direction of the fixing plate.

[0013] By adopting the above technical solution, when it is necessary to pull out the disassembly column from the punch, the fixing stud is screwed out so that the fixing stud is separated from the fixing plate, and the disassembly column can be pulled out. When it is necessary to fix the disassembly column, the fixing stud is screwed in so that the fixing stud is threadedly connected to the fixing plate to fix the disassembly column. The disassembly column is fixed in this way because although the purpose of replacing the punch output end can be achieved by fixing the disassembly column on the punch, the lengths of the punch output ends of different plastic parts are different. A fixed disassembly column will cause an excessively long punch output end to be unable to be completely installed on the disassembly column, and an excessively short punch output end will cause a thread gap to be left on the disassembly column, resulting in differences in the shape of the processed plastic parts. Therefore, the disassembly column installed in the mounting hole can adjust the length of the disassembly column extending out of the punch according to the length of the punch output end to adapt to punch output ends of different lengths. The function of multiple fixing screw holes is to match the lengths of punch output ends of different lengths.

[0014] Furthermore, elastic rubber is evenly laid on the inner wall of the installation groove.

[0015] By adopting the above technical solution, the elastic rubber is used to fill the gap between the mounting groove and the casting platform to prevent the gap from affecting the exhaust of the mold.

[0016] Furthermore, the edge of the elastic rubber close to the male mold is an arc portion.

[0017] By adopting the above technical solution, the arc portion makes it easier for the staff to install the casting platform in the installation groove.

[0018] Furthermore, an adjusting mechanism for adjusting the depth of the casting cavity is provided inside the casting cavity.

[0019] Furthermore, the adjustment mechanism includes an adjustment platform located in the casting cavity and fitting the periphery of the casting cavity, and an adjustment stud fixedly connected to the bottom surface of the adjustment platform and extending out of the casting platform. The adjustment stud is threadedly connected to the casting platform, and one end of the adjustment stud extending out of the casting platform is fixedly connected to a connecting piece, and the connecting piece is connected to the die through the adjustment stud.

[0020] By adopting the above technical solution, although the setting of the fixing device can make the disassembly column adapt to the length of different punch output ends, there is a special case: that is, some new plastic parts differ from old plastic parts in that the thickness of their bottom surfaces is different, and the thickness of the bottom surface of the plastic parts is determined by the distance between the bottom surface of the casting cavity and the end surface of the punch output end. At this time, if the distance that the disassembly column extends out of the punch is adjusted by the fixing device, the punch output end will not be able to fit the punch, resulting in errors in the shape of the plastic part. The setting of the adjustment mechanism solves this technical problem. When the new plastic part differs from the old plastic part in that the thickness of their bottom surfaces is different, the adjusting stud drives the adjusting platform to move up and down in the casting cavity by rotating the connecting piece forward or reversely, changing the depth of the casting cavity, thereby changing the distance between the bottom surface of the casting cavity and the end surface of the punch output end, so that when encountering special circumstances, the staff can complete the mold adjustment of the new plastic part without replacing the punch output end, thereby further saving production costs.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] By setting up the replacement structure and the disassembly structure, the factory only needs to replace the casting platform and the punch output end to process new plastic parts, which saves production costs. At the same time, when the punch and the die are worn, the punch and the die can continue to work by replacing the casting platform and the punch output end, thereby improving the service life of the punch and the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0024] Figure 2 is along Figure 1 Sectional view along line AA;

[0025] Figure 3 It is another view of the overall structure of the embodiment;

[0026] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0027] Figure numerals: 1. die; 10. punch; 11. casting cavity; 12. punch output end; 2. replacement structure; 20. mounting groove; 21. casting platform; 22. elastic rubber; 3. disassembly structure; 30. mounting hole; 31. disassembly column; 4. fixing structure; 40. fixing hole; 41. fixing bolt; 5. connecting piece; 6. fixing device; 60. fixing plate; 61. fixing screw hole; 62. fixing stud; 7. adjustment mechanism; 70. adjustment platform; 71. adjustment stud. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings.

[0029] Example, see Figure 1 as well as Figure 2 A multifunctional injection mold includes a die 1 and a punch 10 arranged opposite thereto. The die 1 is provided with a casting cavity 11. The casting cavity 11 is a key part for molding plastic parts. Its shape and size directly determine the appearance and performance of the final plastic parts. The die 1 is provided with a replacement structure 2 for facilitating the replacement of the casting cavity 11. The casting cavity 11 is provided on the replacement structure 2. The replacement structure 2 includes a mounting groove 20 provided on the surface of the die 1 and a casting platform 21 that can be tightly embedded in the mounting groove 20. The casting cavity 11 is provided on the side of the casting platform 21 opposite to the punch 10, and its opening direction faces the punch 10, so as to ensure the cooperation with the punch 10 during the injection molding process.

[0030] Inside the installation groove 20, a set of fixing structures 4 is provided for fixing the casting platform 21. Correspondingly, the bottom surface of the casting platform 21 is provided with connecting parts 5. These connecting parts 5 cooperate with the fixing structures 4 to realize the installation of the casting platform 21 in the installation groove 20.

[0031] The male mold 10 is used to cooperate with the female mold 1 to form the final shape of the plastic part. The male mold 10 is provided with a male mold output end 12, which can extend into the casting cavity 11 and form a complete mold cavity together with the casting cavity 11 to form the final shape of the plastic part. At the same time, a main channel is also opened inside the male mold 10 to connect the injection molding device to ensure the smooth flow of the injection molding material.

[0032] Combination Figure 3 as well as Figure 4 In order to further improve the flexibility and applicability of the injection mold, a disassembly structure 3 is provided on the punch 10, so that the punch output end 12 can be easily replaced. The disassembly structure 3 includes a mounting hole 30 provided on the punch 10, and a disassembly column 31 installed in the mounting hole 30, and the punch output end 12 is connected to the disassembly column 31 by a threaded connection. In order to ensure the stability of the disassembly column 31 in the mounting hole 30, a fixing device 6 is also provided to lock the disassembly column 31.

[0033] When a new plastic part needs to be processed, the factory only needs to follow the following steps: first, a casting cavity 11 corresponding to the new plastic part is processed on the casting platform 21; then, the fixing state of the disassembly column 31 is unlocked by the fixing device 6, and the disassembly column 31 is removed from the punch 10 to facilitate the replacement of the punch output end 12, and then the current punch output end 12 is unscrewed and replaced with a punch output end 12 suitable for the new plastic part; then, the disassembly column 31 is reinserted into the mounting hole 30 and fixed by the fixing device 6; finally, the new casting platform 21 is installed in the mounting groove 20, and the new casting platform 21 is fixed by the fixing structure 4 and the connecting member 5. In this way, when the female mold 1 and the punch 10 are molded together, the mold cavity will present the shape of the new plastic part.

[0034] The factory only needs to replace the casting platform 21 and the punch output end 12 to process new plastic parts. This arrangement not only greatly saves production costs, but also when the punch output end 12 of the punch 10 and the casting platform 21 of the die 1 are worn, the mold can continue to work by simply replacing the casting platform 21 and the punch output end 12, thereby significantly extending the service life of the punch 10 and the die 1.

[0035] In this embodiment, a plurality of connecting members 5 are provided, and they are evenly distributed on the bottom surface of the casting platform 21 to ensure the stability of the casting platform 21 in the mounting groove 20. These connecting members 5 are designed in a cylindrical shape, and an internal thread is provided at one end away from the casting platform 21, and this design is to achieve a tight and reliable connection with the fixing structure 4.

[0036] The fixing structure 4 includes a plurality of fixing holes 40 located inside the mounting groove 20 and penetrating the bottom surface of the die 1. The positions of the fixing holes 40 correspond to the connecting member 5, ensuring that the connecting member 5 can be smoothly inserted therein. In addition, each fixing hole 40 is equipped with a fixing bolt 41, which can be inserted into the fixing hole 40 and threadedly connected with the internal thread of the connecting member 5.

[0037] A flange having a diameter larger than the fixing hole 40 is fixedly provided at one end of the fixing bolt 41 away from the connecting member 5. The design of the flange not only increases the structural strength of the fixing bolt 41, but also ensures that when the fixing bolt 41 is tightened, it can be tightly pressed against the bottom surface of the die 1, thereby further enhancing the fixing effect of the casting platform 21.

[0038] In actual operation, when the casting platform 21 needs to be placed in the installation groove 20, first ensure that the connecting member 5 can smoothly extend into the corresponding fixing hole 40. Then, align the fixing bolt 41 with the internal thread of the connecting member 5 and tighten it by rotating it clockwise. As the fixing bolt 41 gradually goes deeper, the threaded connection between it and the connecting member 5 will become tighter and tighter until a predetermined tightening degree is reached. At this point, the casting platform 21 is fixed in the installation groove 20.

[0039] This design not only realizes the quick and easy installation of the casting platform 21, but also ensures its stability and reliability during the injection molding process. At the same time, since the designs of the connecting member 5 and the fixing structure 4 are both highly flexible and adaptable, it can be easily realized when the casting platform 21 of different shapes needs to be replaced.

[0040] In this embodiment, the fixing device 6 includes a fixing plate 60, which is fixedly arranged on the end surface of the disassembly column 31 away from the male mold output end 12. The fixing plate 60 is provided with a plurality of parallel fixing screw holes 61, which are neatly arranged along the length direction of the fixing plate 60. In addition, there is a fixing stud 62, which is located on one side of the male mold 10 and can pass through the male mold 10 and extend into the mounting hole 30 to achieve threaded connection with the fixing screw hole 61 on the fixing plate 60.

[0041] When the disassembly column 31 needs to be fixed, the operation process is very simple. It is only necessary to align the fixing stud 62 with a fixing screw hole 61 on the fixing plate 60, and rotate it clockwise to tighten until the fixing stud 62 is tightly connected to the fixing plate 60. In this way, the disassembly column 31 is firmly fixed on the male mold 10.

[0042] If it is necessary to pull out the disassembly column 31 from the male die 10, it can also be easily achieved. Just rotate the fixing stud 62 counterclockwise to screw it out from the fixing plate 60, so that the fixing stud 62 is separated from the fixing plate 60. At this time, the disassembly column 31 can be smoothly pulled out from the male die 10.

[0043] The reason why this setting uses a detachable disassembly column 31 instead of directly fixing the disassembly column 31 on the punch 10 is due to the difference in length of the punch output end 12 of different plastic parts. In actual applications, the lengths of the punch output ends 12 of different plastic parts may be different. If the disassembly column 31 is fixed on the punch 10, then for a punch output end 12 that is too long, it may not be completely installed on the disassembly column 31; and for a punch output end 12 that is too short, a thread gap may be left on the disassembly column 31. Both situations may lead to differences in the shape of the processed plastic parts, thereby affecting product quality.

[0044] Therefore, in this embodiment, a disassembly column 31 that can be installed in the installation hole 30 is used, and a fixing device 6 that matches it is designed. In this way, the length of the disassembly column 31 extending outside the punch 10 can be adjusted according to the actual length of the punch output end 12 to adapt to the punch output ends 12 of different lengths. At the same time, the multiple fixing screw holes 61 opened on the fixing sheet 60 also play a key role. They can match the punch output ends 12 of different lengths to ensure that the disassembly column 31 can be firmly fixed on the punch 10.

[0045] In this embodiment, a layer of elastic rubber 22 is evenly laid on the inner wall of the mounting groove 20. The main function of this layer of elastic rubber 22 is to fill the small gap that may exist between the mounting groove 20 and the casting platform 21. The purpose of doing so is to prevent these gaps from having an adverse effect on the exhaust process of the mold. In addition, the edge of the elastic rubber 22 on the side close to the punch 10 is an arc portion. The design of this arc portion greatly facilitates the process of the staff installing the casting platform 21 into the mounting groove 20, making the installation operation smoother and more efficient. In general, these design details not only improve the exhaust performance of the mold, but also optimize the installation process and improve work efficiency.

[0046] Although the setting of the fixing device 6 enables the disassembly column 31 to adapt to different lengths of the punch output end 12, this method may encounter problems in certain situations. Specifically, when faced with a situation where the thickness of the bottom surface of the new and old plastic parts is different, this difference is actually determined by the distance between the bottom surface of the casting cavity 11 and the end surface of the punch output end 12 when the mold is closed. If the length of the disassembly column 31 extending out of the punch 10 is adjusted by relying solely on the fixing device 6, the punch output end 12 may not fit tightly against the punch 10, thereby causing errors in the shape of the plastic part.

[0047] In order to solve this technical problem, the present embodiment provides an adjustment mechanism 7 inside the casting cavity 11. The adjustment mechanism 7 consists of two parts: one is an adjustment platform 70 located inside the casting cavity 11 and its periphery is closely attached to the inner wall of the casting cavity 11, which plays a key supporting and adjusting role; the other is an adjustment stud 71 fixedly connected to the bottom surface of the adjustment platform 70 and extending out of the casting platform 21, the adjustment stud 71 is threadedly connected to the casting platform 21, and the other end of the adjustment stud 71 is firmly connected to the connector 5. With such a structure, the connector 5 can achieve a stable connection with the die 1 through the adjustment stud 71.

[0048] When the thickness of the bottom surface of the new and old plastic parts is different, the staff only needs to rotate the connector 5 forward or reverse to drive the adjustment stud 71 to drive the adjustment platform 70 to move up and down inside the casting cavity 11. This operation will directly change the depth of the casting cavity 11, thereby adjusting the distance between the bottom surface of the casting cavity 11 and the end surface of the punch output end 12. In this way, even in the special case where the thickness of the bottom surface of the plastic part needs to be adjusted, the staff does not need to replace the punch output end 12, and can easily complete the mold adjustment work, thereby further reducing production costs and improving production efficiency.

[0049] Specific implementation process: when a new plastic part needs to be processed, a casting cavity 11 of a new plastic part is processed on the casting platform 21 in advance, and then the fixing stud 62 is screwed out to make the fixing stud 62 detach from the fixing plate 60, and the disassembly column 31 can be pulled out, and then the punch output end 12 on the disassembly column 31 is unscrewed to replace the punch output end 12 of the new plastic part, and the disassembly column 31 is installed on the punch 10 through the mounting hole 30 and the punch output end 12 is adjusted so that it is attached to the punch 10, and then the fixing stud 62 is screwed in so that the fixing stud 62 is threadedly connected to the fixing plate 60 to fix the disassembly column 31, and then the fixing bolt 41 is screwed out so that the fixing bolt 41 is detached from the connecting member 5, and then the casting platform 21 is removed from the die 1, and then the casting platform 21 of the new plastic part is installed in the mounting groove 20, so that the connecting member 5 extends into the fixing hole 40, and then the fixing bolt 41 is aligned with the internal thread of the connecting member 5 and screwed in, so that the fixing bolt 41 is threadedly connected to the connecting member 5 to fix the casting platform 21.

[0050] When the difference between a new plastic part and an old plastic part lies in the different thickness of their bottom surfaces and the die 1 and the punch 10 need to be replaced, the fixing bolt 41 can be unscrewed first to disengage the fixing bolt 41 from the connecting piece 5, and then the casting platform 21 can be removed from the die 1, and then the connecting piece 5 can be rotated forward or reversed so that the adjusting stud 71 drives the adjusting platform 70 to move up and down in the casting cavity 11 to change the depth of the casting cavity 11, and then the casting platform 21 is installed in the mounting groove 20 and the connecting piece 5 is fixed with the fixing bolt 41.

[0051] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multifunctional injection mold, comprising a die (1) and a convex mold (10) opposite to the die (1), wherein the die (1) is provided with a casting cavity (11) for forming a plastic part, and the convex mold (10) is provided with a convex mold output end (12) for extending into the casting cavity (11) and cooperating with the casting cavity (11) to form a mold cavity of a final shape of the plastic part, and the convex mold (10) is provided with a main flow channel for connecting to an injection molding device, characterized in that: The female mold (1) is provided with a replacement structure (2) for replacing the casting cavity (11), and the male mold (10) is provided with a disassembly structure (3) for replacing the male mold output end (12). The replacement structure (2) includes a mounting groove (20) provided on the female mold (1) and a casting platform (21) installed in the mounting groove (20). The casting cavity (11) is provided on the casting platform (21), and the mounting groove (20) is provided with a fixing structure (4) for fixing the casting platform (21). ), the bottom surface of the casting platform (21) is provided with a connecting piece (5) for cooperating with the fixing structure (4), the disassembly structure (3) comprises a mounting hole (30) provided on the punch (10) and a disassembly column (31) installed in the mounting hole (30), the punch output end (12) is threadedly connected to the disassembly column (31), the mounting hole (30) is provided with a fixing device (6) for fixing the disassembly column (31), the connecting piece (5) is provided with a plurality of evenly distributed on the casting platform (21) The bottom surface of the die (1), the connecting member (5) is a column, and an end thereof away from the casting platform (21) is provided with an internal thread, the fixing structure (4) comprises a plurality of fixing holes (40) located in the mounting groove (20) and penetrating the bottom surface of the die (1), and fixing bolts (41) extending into the fixing holes (40) and connected to the connecting member (5) through the internal threads, the fixing holes (40) being provided in the die (1), and the fixing bolts (41) are provided with a bolt having a diameter larger than the fixing holes (40) at one end thereof away from the connecting member (5). The fixing device (6) comprises a fixing plate (60) fixedly arranged on the end surface of the disassembly column (31) away from the output end (12) of the punch, a fixing screw hole (61) provided on the fixing plate (60), and a fixing stud (62) located on one side of the punch (10) and penetrating into the punch (10) and extending into the installation hole (30), wherein the fixing stud (62) is threadedly connected to the fixing plate (60), and a plurality of fixing screw holes (61) are provided and arranged along the length direction of the fixing plate (60).

2. A multifunctional injection mold according to claim 1, characterized in that: Elastic rubber (22) is evenly laid on the inner wall of the installation groove (20).

3. A multifunctional injection mold according to claim 2, characterized in that: The edge of the elastic rubber (22) close to the male mold (10) is an arc portion.

4. A multifunctional injection mold according to claim 1, characterized in that: An adjusting mechanism (7) for adjusting the depth of the casting cavity (11) is provided inside the casting cavity (11).

5. A multifunctional injection mold according to claim 4, characterized in that: The adjusting mechanism (7) comprises an adjusting platform (70) located in the casting cavity (11) and having its periphery in contact with the casting cavity (11), and an adjusting stud (71) fixedly connected to the bottom surface of the adjusting platform (70) and extending out of the casting platform (21); the adjusting stud (71) is threadedly connected to the casting platform (21); one end of the adjusting stud (71) extending out of the casting platform (21) is fixedly connected to a connecting piece (5); and the connecting piece (5) is connected to the die (1) via the adjusting stud (71).

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