Adjustable mold base

Abstract

The utility model relates to the technical field of mold bases, in particular to an adjustable mold base, an upper mold and a mold core on the upper mold. The lower die can be assembled with the upper die, and after assembly, a die cavity is formed between the die core and the lower die; a through hole and a first air channel which are communicated with the mold cavity are formed in the mold core; an assembling shaft body is rotatably mounted in the upper mold, a penetrating groove is designed in the assembling shaft body in a penetrating manner, the output end of the penetrating groove can communicate with the through hole or the first air channel, and the input end of the penetrating groove can be associated with an external injection molding system or a negative pressure system; a driver for controlling the assembly shaft body to rotate is designed on the upper die, a second air channel is formed in the upper die, the two ends of the second air channel are both communicated with the interior of the first air channel, and a plug is installed in the first air channel in a piston type sliding mode; according to the utility model, air exhaust and injection molding can be quickly switched, and the injection molding quality of a product is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of mold bases, in particular to an adjustable mold base. Background Art

[0002] The injection mold base is a key part of the injection mold. It refers to the basic component of the mold and is the product of applying mold theory and technology to the actual manufacturing process. Especially in micro mold bases, multi-channel design is required, such as gates, injection channels, water cooling channels, exhaust channels and guide holes, which increases the design and manufacturing costs of the mold base. Utility Model Content

[0003] The utility model provides an adjustable mold base, which can quickly switch between vacuuming and injection molding without affecting the injection molding quality of the product.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] An adjustable mold base, comprising:

[0006] An upper mold and a mold core thereon; a lower mold that can be assembled with the upper mold, after assembly, a mold cavity is formed between the mold core and the lower mold; a conducting hole and a first air duct connected to the mold cavity are provided on the mold core; an assembly shaft is rotatably installed inside the upper mold, a through groove is designed through the assembly shaft, the output end of the through groove can be connected to the conducting hole or the first air duct, and the input end of the through groove can be associated with an external injection molding system or a negative pressure system; a driver is designed on the upper mold to control the rotation of the assembly shaft.

[0007] Optionally, a second air channel is opened inside the upper mold, and both ends of the second air channel are communicated with the interior of the first air channel, and a plug is installed in a piston-like sliding manner inside the first air channel; wherein, the plug has an initial position and a passive position, and in the initial position of the plug, the plug blocks one end of the second air channel, and the plug is in a passive position due to negative pressure attraction, and when the plug is in the passive position, the plug releases the blockage of one end of the second air channel, and at this time, the mold cavity, the first air channel, the second air channel and the negative pressure system form a passage; wherein, a resetter is designed in the first air channel to move the plug from the passive position to the initial position.

[0008] Optionally, the resetter includes an annular electromagnet fixedly installed in the first airway, and the annular electromagnet can generate magnetism when energized. The end of the plug is designed as a square iron, and the square iron and the energized annular electromagnet attract each other. The annular electromagnet can attract the plug to remain in a passive position when energized. A spring device is installed between the annular electromagnet and the end of the plug, and the spring device can limit the plug to an initial position when in a normal state.

[0009] Optionally, in the initial position of the plug, the bottom of the plug and the outer wall of the mold core maintain the same plane or curved surface.

[0010] Optionally, an assembly groove is opened on the upper mold, the mold core is rotatably assembled on the inner wall of the assembly groove, the outer wall of the mold core is fixedly installed with a spline shaft, the assembly groove is installed with a servo motor, and the output end of the assembly groove is transmission-connected to the spline shaft.

[0011] Optionally, a key sleeve is fixedly installed at the output end of the assembly groove, and a spline fit is formed between the key sleeve and the spline shaft. A bearing sleeve is also detachably installed inside the assembly groove, and the bearing sleeve limits the axial position of the mold core.

[0012] Optionally, an injection runner and an exhaust channel are also provided on the top of the upper mold. The injection runner is associated with an external injection molding system, and the exhaust channel is associated with an external negative pressure system. The input end of the through groove can be connected to the injection runner or the exhaust channel.

[0013] Optionally, the conducting hole and the injection runner are both in a vertical state. When the through groove is in a vertical state, a vertical conducting path is formed between the injection runner, the exhaust channel, the conducting hole and the mold cavity, and the inner diameter of the injection runner is smaller than the inner diameter of the conducting hole.

[0014] The utility model provides an adjustable mold base, which has the following beneficial effects:

[0015] First, by designing the rotation of the mold core, the through groove can be selectively connected to any one of the first air channel and the conducting hole, thereby realizing the switching between vacuuming and injection molding.

[0016] Second, when the output end of the through-groove is connected to the first air channel, the plug will be attracted by the negative pressure to complete its movement in the first air channel, thereby moving to the passive position and releasing the blockage of the second air channel. At this time, the second air channel will enable the mold cavity and the through-groove to communicate with each other. At this time, the negative pressure system can extract the air inside the mold cavity to complete the exhaust process.

[0017] 3. In the initial position of the plug, the bottom of the plug and the outer wall of the mold core maintain the same plane or curved surface, so that the bottom of the plug and the outer wall of the mold core have overall consistency, thereby improving the appearance quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the utility model;

[0020] Figure 3 For this utility model Figure 1 Right view;

[0021] Figure 4 For this utility model Figure 3 Schematic diagram of the structure viewed from the AA position;

[0022] Figure 5 For this utility model Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 This is a schematic diagram of the state of the plug in the present invention when it is in a passive position;

[0024] Figure 7 This is a schematic diagram of the state of the vertical guide path in the utility model;

[0025] Figure 8 For this utility model Figure 1 Front view of

[0026] Figure 9 For this utility model Figure 8 Cross-sectional view at CC.

[0027] In the figure: 1. Upper mold; 2. Lower mold; 4. Mold cavity; 5. Assembly shaft; 6. Mold core; 7. Through groove; 8. First air channel; 9. Second air channel; 11. Plug; 12. Ring electromagnet; 13. Spring device; 14. Injection runner; 15. Exhaust channel; 16. Through hole; 17. Spline shaft; 18. Assembly groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0029] See also Figures 1 to 9 The utility model provides a technical solution: an adjustable mold base, comprising:

[0030] An upper mold 1 and a mold core 6 thereon; a lower mold 2 that can be assembled with the upper mold 1, whereby a mold cavity 4 is formed between the mold core 6 and the lower mold 2 after assembly;

[0031] The mold core 6 is provided with a conducting hole 16 and a first air duct 8 connected to the mold cavity 4; the upper mold 1 is internally rotatably installed with an assembly shaft 5, and the assembly shaft 5 is designed with a through groove 7, the output end of the through groove 7 can be connected to the conducting hole 16 or the first air duct 8, and the input end of the through groove 7 can be associated with an external injection molding system or a negative pressure system; the upper mold 1 is designed with a driver for controlling the rotation of the assembly shaft 5.

[0032] In this solution, in more detail, the position where the first air duct 8 and the conducting hole 16 are connected to the mold cavity 4 is determined according to demand, and the input end of the first air duct 8 and the conducting hole 16, that is, the end away from the mold cavity 4, needs to be designed to be able to communicate with the through groove 7. By designing the rotation of the mold core 6, the through groove 7 can be selectively connected to any one of the first air duct 8 and the conducting hole 16. At this time, it is only necessary to associate the external injection molding system or the negative pressure system with the input end of the through groove 7, so as to realize the switching between vacuuming and injection molding, and the vacuuming process before injection molding can be completed quickly.

[0033] In a more preferred embodiment, a second air channel 9 is provided inside the upper mold 1, and both ends of the second air channel 9 are communicated with the interior of the first air channel 8. A plug 11 is installed in the interior of the first air channel 8 in a piston-like sliding manner; wherein the plug 11 has an initial position and a passive position. In the initial position of the plug 11, the plug 11 blocks one end of the second air channel 9, and the plug 11 is attracted by negative pressure and is in a passive position. When the plug 11 is in the passive position, the plug 11 releases the blockage of one end of the second air channel 9. At this time, the mold cavity 4, the first air channel 8, the second air channel 9 and the negative pressure system form a passage; wherein a reset device is designed in the first air channel 8 to move the plug 11 from the passive position to the initial position, please refer to Figures 2 to 6 In this embodiment, by designing the plug 11, it can be used as a key component to complete the opening and closing of the first air channel 8. When the first air channel 8 is opened, the negative pressure system can extract the air in the mold cavity 4 through the through groove 7, the first air channel 8 and the second air channel 9, thereby improving the injection molding quality. When the first air channel 8 is closed, the injection molding material in the mold cavity 4 can be prevented from entering the interior of the first air channel 8. The movement of the plug 11 from the initial position to the passive position is controlled by the negative pressure system. When the output end of the through groove 7 is connected to the first air channel 8, the plug 11 will be attracted by the negative pressure to complete the movement in the first air channel 8, thereby moving to the passive position and releasing the blockage of the second air channel 9. At this time, the second air channel 9 will enable the mold cavity 4 to communicate with the through groove 7. At this time, the negative pressure system can extract the air inside the mold cavity 4. The function of the resetter is to move the plug 11 from the passive position to the initial position, close the first air channel 8, and avoid contamination.

[0034] Furthermore, the resetter includes an annular electromagnet 12 fixedly mounted in the first airway 8. The annular electromagnet 12 generates magnetism when energized. The end of the plug 11 is designed as a square iron. The square iron and the energized annular electromagnet 12 attract each other. The annular electromagnet 12 can attract the plug 11 to maintain it in the passive position when energized. A spring 13 is installed between the annular electromagnet 12 and the end of the plug 11. When the spring 13 is in a normal state, it can limit the plug 11 to the initial position. Please refer to Figure 5 and Figure 6 Detail enlarged view, in this embodiment, the magnetism generated by the annular electromagnet 12 is used to keep the embolism 11 in the passive position, and the power-on process of the annular electromagnet 12 is associated with the operation of the negative pressure system. When the negative pressure system is working, the annular electromagnet 12 is energized to generate magnetism. At this time, the embolism 11 will move closer to the annular electromagnet 12 under the action of pressure, so that the square iron and the annular electromagnet 12 can attract each other, and at the same time overcome the elastic limitation of the spring device 13, so that the embolism 11 is kept in the passive position, so that the mold cavity 4 can be connected to the through groove 7 and the negative pressure system, thereby extracting the air in the mold cavity 4 and avoiding the problem of bubbles generated by injection molding. After the exhaust process is completed, the annular electromagnet 12 is de-energized. At this time, the annular electromagnet 12 loses its magnetic attraction, and the spring device 13 loses its restriction and releases its own accumulated elastic potential energy, thereby enabling the embolism 11 to move from the passive position to the initial position and complete the reset.

[0035] Furthermore, in the initial position of the plug 11, the bottom of the plug 11 and the outer wall of the mold core 6 maintain the same plane or curved surface, see Figure 5 In this embodiment, the bottom of the plug 11 and the outer wall of the mold core 6 are generally consistent with each other, thereby avoiding the generation of weld marks and other problems that affect the appearance quality of the product.

[0036] Among the more preferred embodiments, please refer to Figure 8 and Figure 9 An assembly groove 18 is provided on the upper mold 1, and the mold core 6 is rotatably assembled on the inner wall of the assembly groove 18. A spline shaft 17 is fixedly installed on the outer wall of the mold core 6. A servo motor is installed in the assembly groove 18, and the output end of the assembly groove 18 is transmission connected to the spline shaft 17.

[0037] Furthermore, a key sleeve is fixedly installed at the output end of the assembly groove 18, and a spline fit is formed between the key sleeve and the spline shaft 17. A bearing sleeve is also detachably installed inside the assembly groove 18, and the bearing sleeve limits the axial position of the mold core 6. In this embodiment, the mold core 6 can be disassembled by utilizing the fit between the key sleeve and the spline shaft 17, which is convenient for cleaning and maintenance. Secondly, the function of the bearing sleeve is to limit the axial displacement of the mold core 6 and prevent the mold core 6 from being offset and dislocated.

[0038] For further information, see Figure 7An injection runner 14 and an exhaust channel 15 are also provided on the top of the upper mold 1. The injection runner 14 is associated with the external injection molding system, and the exhaust channel 15 is associated with the external negative pressure system. The input end of the through-groove 7 can be connected to the injection runner 14 or the exhaust channel 15.

[0039] The through hole 16 and the injection runner 14 are both in a vertical state. When the through slot 7 is in a vertical state, a vertical guide path is formed between the injection runner 14, the exhaust channel 15, the through hole 16 and the mold cavity 4, and the inner diameter of the injection runner 14 is smaller than the inner diameter of the through hole 16. Figure 7 In this embodiment, when the through groove 7, the injection runner 14 and the conducting hole 16 are all in a vertical state, the three together form a vertical conducting hole, which is convenient for the rapid transfer and transportation of the injection molding material. Secondly, the expansion fit between the inner diameter of the injection runner 14 and the inner diameter of the conducting hole 16 can avoid the sputtering output of the injection molding material to the interior of the mold cavity 4, so that the material flows smoothly and fills slowly to improve the quality of the injection molding and reduce bubbles or internal defects caused by sputtering.

[0040] By utilizing the above structures, it is possible to quickly switch between vacuuming and injection molding without affecting the injection molding quality of the product.

[0041] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and drawings can also be directly processed according to existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so no specific description is given here.

[0042] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable mold base, characterized by: include: An upper mold (1) and a mold core (6) thereon; A lower mold (2) that can be assembled with the upper mold (1); after assembly, a mold cavity (4) is formed between the mold core (6) and the lower mold (2); The mold core (6) is provided with a conducting hole (16) and a first air passage (8) communicating with the mold cavity (4); An assembly shaft (5) is rotatably mounted inside the upper mold (1), and a through groove (7) is designed to penetrate the assembly shaft (5). The output end of the through groove (7) can be communicated with the guide hole (16) or the first air channel (8), and the input end of the through groove (7) can be associated with an external injection molding system or a negative pressure system. The upper die (1) is provided with a driver for controlling the rotation of the assembly shaft (5).

2. The adjustable mold base according to claim 1, characterized in that: A second air channel (9) is provided inside the upper mold (1), both ends of the second air channel (9) are connected to the inside of the first air channel (8), and a plug (11) is installed in a piston-like sliding manner inside the first air channel (8); The plug (11) has an initial position and a passive position. In the initial position of the plug (11), the plug (11) blocks one end of the second air channel (9). The plug (11) is attracted by negative pressure and is in a passive position. In the passive position of the plug (11), the plug (11) releases the blockage of one end of the second air channel (9). At this time, the mold cavity (4), the first air channel (8), the second air channel (9) and the negative pressure system form a passage. A resetter is designed in the first airway (8) to move the plug (11) from a passive position to an initial position.

3. The adjustable mold base according to claim 2, characterized in that: The resetter includes an annular electromagnet (12) fixedly installed in the first airway (8), and the annular electromagnet (12) can generate magnetism when energized. The end of the plug (11) is designed as a square iron, and the square iron and the energized annular electromagnet (12) attract each other. The annular electromagnet (12) can attract the plug (11) to maintain it in a passive position when energized. A spring device (13) is installed between the annular electromagnet (12) and the end of the plug (11), and the spring device (13) can limit the plug (11) to be in an initial position when it is in a normal state.

4. The adjustable mold base according to claim 2, characterized in that: In the initial position of the plug (11), the bottom of the plug (11) maintains the same plane or curved surface as the outer wall of the mold core (6).

5. The adjustable mold base according to claim 1, characterized in that: The upper mold (1) is provided with an assembly groove (18), the mold core (6) is rotatably assembled on the inner wall of the assembly groove (18), the outer wall of the mold core (6) is fixedly mounted with a spline shaft (17), the assembly groove (18) is mounted with a servo motor, and the output end of the assembly groove (18) is transmission-connected to the spline shaft (17).

6. The adjustable mold base according to claim 5, characterized in that: A key sleeve is fixedly mounted on the output end of the assembly groove (18), and a spline fit is formed between the key sleeve and the spline shaft (17). A bearing sleeve is also detachably mounted inside the assembly groove (18), and the bearing sleeve limits the axial position of the mold core (6).

7. The adjustable mold base according to any one of claims 1 to 6, characterized in that: The top of the upper mold (1) is also provided with an injection runner (14) and an exhaust channel (15), wherein the injection runner (14) is associated with an external injection molding system, and the exhaust channel (15) is associated with an external negative pressure system, and the input end of the through groove (7) can be connected to the injection runner (14) or the exhaust channel (15).

8. The adjustable mold base according to claim 7, characterized in that: The conducting hole (16) and the injection runner (14) are both in a vertical state. When the through groove (7) is in a vertical state, a vertical conducting path is formed between the injection runner (14), the exhaust channel (15), the conducting hole (16) and the mold cavity (4), and the inner diameter of the injection runner (14) is smaller than the inner diameter of the conducting hole (16).

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