In-mold injection molding device applied to in-mold decoration (IMD)

Abstract

The utility model belongs to the technical field of IMD (in-mold decoration), and particularly discloses an IMD device applied to IMD, which comprises a mold base and a milling machine, a connecting plate is arranged on the side edge of the mold base, a lower mold plate is arranged above the mold base plate, an IMD product main body is arranged in the lower mold plate, a support column is arranged above the connecting plate, and the milling machine is arranged on the support column. A driving motor is fixed in the supporting column, a first supporting plate and a second supporting plate are symmetrically fixed above the supporting plate, a first telescopic motor is arranged on the first supporting plate, the output end of the first telescopic motor is connected with a mold supporting plate, an upper mold plate matched with the lower mold plate is arranged below the mold supporting plate, and an injection molding opening is formed in the middle of the mold supporting plate; a second telescopic motor is arranged on the second supporting plate, the output end of the second telescopic motor is connected with a mounting plate, a milling machine is arranged below the mounting plate, and the wall thickness at the window of the IMD product main body is milled and thinned by switching the milling machine, so that it is ensured that the wall thickness at the window is thinned to meet the display definition requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of IMD in-mold injection molding, in particular to an in-mold injection molding device applied to IMD. Background Art

[0002] IMD is also called in-mold molding decoration technology. IMD is an internationally popular surface decoration technology. It is mainly used for the decoration and functional control panels of home appliances, car dashboards, air conditioning panels, mobile phone shells / lenses, washing machines, refrigerators, etc. It is widely used. IMD is actually a product made by inserting the printed film into the injection mold cavity after molding and punching, and then molding it. It integrates printing, molding, molding, and injection molding technology, and comprehensively uses plastic sheets, inks, and plastic resins. The injection molding resin is combined with the ink layer on the back of the film, and the panel graphics and logos are placed between the film and the injection molded resin. The graphics and logos will not wear out due to friction or time.

[0003] Existing in-mold injection molding can only achieve injection molding. Because some control panels on home appliances have display windows due to functional requirements, when customers require the printed film to be white in appearance, white ink will be printed on the transparent film, and white ink will have a halo effect. In addition, the product itself is made of a certain thickness (most display panel products are 2.5-3mm thick), so LED light passing through the white product will cause the window display to be blurred, affecting the visual effect. Therefore, the utility model proposes an in-mold injection molding device for IMD, which can mill off a part of the plastic at the display window on the IMD product to reduce the wall thickness. Utility Model Content

[0004] The purpose of the utility model is to provide an in-mold injection molding device applied to IMD to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an in-mold injection molding device applied to IMD, comprising a mold base and a milling machine, a connecting plate is arranged on the side of the mold base, a lower template is arranged above the mold bottom plate, the IMD product body is arranged in the lower template, a support column is arranged above the connecting plate, a driving motor is fixed in the support column, the driving shaft of the driving motor is connected to the connecting plate, a first support plate and a second support plate are symmetrically fixed above the support column, a first telescopic motor is arranged on the first support plate, the output end of the first telescopic motor is connected to the mold support plate, an upper template cooperating with the lower template is arranged below the mold support plate, and an injection port is arranged in the middle of the mold support plate, a second telescopic motor is arranged on the second support plate, the output end of the second telescopic motor is connected to the mounting plate, a milling machine is arranged below the mounting plate, and a milling cutter is arranged at the output end of the milling machine.

[0006] The mold support plate is pushed down by the first telescopic motor, and the main body of the IMD product is injection molded by the cooperation of the upper template and the lower template. After molding, the support column is used to rotate the milling machine to the top of the mold base, and then the second telescopic motor is used to push the milling machine downward. The window of the main body of the IMD product is milled by the milling machine to make the thickness of the display window thinner to 1mm (when the thickness is less than 1mm, the rigidity of the window is insufficient, and when it is greater than 1mm, the clarity of the window is poor).

[0007] Preferably, the sides of the first telescopic motor and the second telescopic motor are respectively provided with a first positioning rod and a second positioning rod, the first positioning rod and the second positioning rod respectively penetrate the first support plate and the second support plate, and the first positioning rod and the second positioning rod are respectively fixed to the mold support plate and the mounting plate.

[0008] Preferably, limiting holes are provided at the corners of the mold support plate and the mounting plate, and the limiting holes can be used to limit the mold support plate and the mounting plate during the lifting process.

[0009] Preferably, a limiting rod is provided at the corner above the mold base, the limiting rod is vertically arranged, and the limiting rod is used to cooperate with the limiting holes of the connecting plate and the mounting plate.

[0010] Preferably, the IMD product body includes a printed white film and a resin material, and the milling machine is used to mill the resin material.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] After the IMD in-mold injection molding is performed by the cooperation of the upper template and the lower template, the support column is driven to rotate by the driving motor, so as to switch the milling machine to mill off and thin the wall thickness at the main window of the IMD product to ensure that the wall thickness at the window is thinned to meet the display clarity requirement, so that the appearance of the home appliances can all be the same color, which is more beautiful and improves the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0015] Figure 3 This is a schematic diagram of the main structure of the IMD product of the utility model;

[0016] Figure 4 This is a schematic diagram of the thinning structure of the main wall of the IMD product of the utility model.

[0017] In the figure: 1. mold base; 2. connecting plate; 3. support column; 4. first support plate; 5. first telescopic motor; 6. first positioning rod; 7. mold support plate; 8. upper template; 9. injection port; 10. second support plate; 11. second telescopic motor; 12. second positioning rod; 13. mounting plate; 14. milling machine; 15. lower template; 16. limiting rod; 17. limiting hole; 18. driving motor; 19. IMD product body; 20. printed white diaphragm; 21. resin material. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1-4The utility model provides a technical solution: an in-mold injection molding device for IMD, comprising a mold base 1 and a milling machine 14, wherein a connecting plate 2 is arranged on the side of the mold base 1, a lower template 15 is arranged above the mold bottom plate, an IMD product body 19 is arranged in the lower template 15, a support column 3 is arranged above the connecting plate 2, a driving motor 18 is fixed in the support column 3, a driving shaft of the driving motor 18 is connected to the connecting plate 2, a first supporting plate 4 and a second supporting plate 10 are symmetrically fixed above the supporting column 3, a first telescopic motor 5 is arranged on the first supporting plate 4, an output end of the first telescopic motor 5 is connected to a mold support plate 7, an upper template 8 cooperating with the lower template 15 is arranged below the mold support plate 7, and an injection port 9 is arranged in the middle of the mold support plate 7, a second telescopic motor 11 is arranged on the second supporting plate 10, an output end of the second telescopic motor 11 is connected to a mounting plate 13, a milling machine 14 is arranged below the mounting plate 13, and a milling cutter is arranged at the output end of the milling machine 14. The mold support plate 7 is pushed down by the first telescopic motor 5, and the IMD product body 19 is injection molded by the cooperation of the upper template 8 and the lower template 15. After molding, the support column 3 is used to rotate the milling machine 14 to the top of the mold base 1, and then the second telescopic motor 11 is used to push the milling machine 14 downward, and the milling machine 14 is used to mill the window of the IMD product body 19 to make the thickness at the display window thinned to 1 mm (when the thickness is less than 1 mm, the rigidity of the window is insufficient, and when it is greater than 1 mm, the clarity of the window is poor).

[0022] Furthermore, the sides of the first telescopic motor 5 and the second telescopic motor 11 are respectively provided with a first positioning rod 6 and a second positioning rod 12, the first positioning rod 6 and the second positioning rod 12 respectively penetrate the first support plate 4 and the second support plate 10, and the first positioning rod 6 and the second positioning rod 12 are respectively fixed to the mold support plate 7 and the mounting plate 13.

[0023] Furthermore, limiting holes 17 are provided at the corners of the mold support plate 7 and the mounting plate 13. The limiting holes 17 can be used to limit the mold support plate 7 and the mounting plate 13 during the lifting process.

[0024] Furthermore, a limiting rod 16 is provided at the corner above the mold base 1 . The limiting rod 16 is vertically arranged and is used to cooperate with the limiting holes 17 of the connecting plate 2 and the mounting plate 13 .

[0025] Furthermore, the IMD product body 19 includes a printed white film 20 and a resin material 21 , and the milling machine 14 is used to perform milling on the resin material 21 .

[0026] In summary, when the device is used, it is only necessary to put the material of the product into the lower template 15 of the mold base 1, and then start the first telescopic motor 5, so that the first telescopic motor 5 pushes the mold support plate 7 down, and at the same time the limiting rod 16 is inserted into the limiting hole 17 to improve stability. When the upper template 8 is combined with the lower template 15, the injection molding operation can be performed through the injection port 9. After completion, the first telescopic motor 5 pulls the mold support plate 7 upward. Pull up the upper template 8, and then start the driving motor 18, so that the driving motor 18 drives the support column 3 to rotate, so that the support column 3 drives the first support plate 4 and the second support plate 10 to rotate, so that the mounting plate 13 is transferred to the top of the mold base 1, and then the second telescopic motor 11 can be started, so that the second telescopic motor 11 pushes the mounting plate 13 downward, so that the milling machine 14 on the mounting plate 13 descends, and at the same time the milling machine 14 is started, and the IMD product body 19 is milled by the milling machine 14, so that the wall thickness at the window is milled off and thinned, so as to ensure that the wall thickness at the window is thinned to meet the display clarity requirements.

[0027] When designing a product, uniform wall thickness is a major principle of plastic part design. If the wall thickness is uneven, the filling speed and cooling shrinkage of the plastic melt will be uneven, which will cause dents, vacuum bubbles, warping, and even cracking. Worse still, it will lead to shrinkage marks, thermal internal stress, distortion of the flexure, different colors or different transparencies. When the wall thickness is smaller, the strength and rigidity of the product during use and assembly will be poor. If the glue thickness at the window is relatively thin when the product is designed, it will be detrimental to the flow of the material in the molten state during injection molding, resulting in a series of problems with the product. Therefore, in order to facilitate injection molding, the product thickness will be designed to be uniform (such as Figure 3 Then, the wall thickness of the window is milled and thinned by CNC machining (as shown in Figure 4 As shown), the above problems can be avoided by post-processing.

[0028] It is worth noting that the entire device is controlled by a main control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An in-mold injection molding device for IMD, characterized in that: The invention comprises a mold base (1) and a milling machine (14), wherein a connecting plate (2) is arranged on the side of the mold base (1), a lower mold plate (15) is arranged above the mold bottom plate, an IMD product body (19) is arranged in the lower mold plate (15), a support column (3) is arranged above the connecting plate (2), a drive motor (18) is fixed in the support column (3), a drive shaft of the drive motor (18) is connected to the connecting plate (2), a first support plate (4) and a second support plate (10) are symmetrically fixed above the support column (3), and the first support plate ( 4) is provided with a first telescopic motor (5), the output end of the first telescopic motor (5) is connected to a mold support plate (7), an upper template (8) matched with a lower template (15) is provided below the mold support plate (7), and an injection port (9) is provided in the middle of the mold support plate (7), a second telescopic motor (11) is provided on the second support plate (10), the output end of the second telescopic motor (11) is connected to a mounting plate (13), a milling machine (14) is provided below the mounting plate (13), and a milling cutter is provided at the output end of the milling machine (14).

2. The in-mold injection molding device for IMD according to claim 1, characterized in that: A first positioning rod (6) and a second positioning rod (12) are respectively arranged on the side of the first telescopic motor (5) and the second telescopic motor (11); the first positioning rod (6) and the second positioning rod (12) respectively penetrate the first support plate (4) and the second support plate (10); and the first positioning rod (6) and the second positioning rod (12) are respectively fixed to the mold support plate (7) and the mounting plate (13).

3. The in-mold injection molding device for IMD according to claim 1, characterized in that: Restriction holes (17) are provided at the corners of the mold support plate (7) and the mounting plate (13).

4. The in-mold injection molding device for IMD according to claim 1, characterized in that: A limiting rod (16) is arranged at a corner above the mold base (1), and the limiting rod (16) is arranged vertically.

5. The in-mold injection molding device for IMD according to claim 1, characterized in that: The IMD product body (19) comprises a printed white film (20) and a resin material (21).

Images