Die for 3D deep drawing of deep diaphragm

Abstract

The utility model discloses a die for 3D deep drawing of a diaphragm, which comprises an upper die plate, a carrier plate for bearing the diaphragm, a floating plate, a flexible heating fixing plate and a lower die plate which are arranged in sequence, a die core is arranged in the floating plate, the floating plate is in sliding fit with the die core, a profiling molded surface matched with the diaphragm is arranged on the die core, and the flexible heating fixing plate is arranged on the lower die plate. The mold core is provided with a deep groove facing the flexible heating fixing plate, the distance between the bottom surface part of the deep groove and the corresponding part of the surface of the profiling molding surface is consistent, the flexible heating fixing plate extends to form a heating fixing convex block matched with the deep groove, and the heating fixing convex block is matched with the deep groove. A heating mounting groove is formed in the heating fixing convex block, a flexible heating rod is embedded in the heating mounting groove, and the height between the flexible heating rod and the corresponding area of the profiling molded surface molded product area is equal; by means of the mode, the diaphragm stretching device can stretch the diaphragm to a large extent, and the problems that the diaphragm is broken, thinned and the like are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to diaphragm stretch forming die technical field, especially a kind of mould for 3D deep drawing diaphragm. BACKGROUND

[0002] In the diaphragm high-pressure forming process of conventional mould, its heating unit is in the form of heating rod inserted into the bottom surface of mold core, and heat is radiated to each surface of 3D mold core in 2D plane form. The surface in the height direction of mold core is not balanced in temperature distribution, and the baking carrier of diaphragm is plane type, so only some shallow-stretched diaphragms can be made, and the drawing height can usually be made within 5mm.

[0003] When the drawing height of 3D diaphragm needs to be deep, conventional heating will cause great temperature difference on the surface of mold core, thereby causing the product produced to be broken due to uneven heating, and problems such as thickness thinning, distortion and large size difference, so the conventional mould can only make some low-drawing products and cannot produce products with large stretching. INVENTION CONTENTS

[0004] The utility model mainly solves the technical problem to provide a kind of mould for 3D deep drawing diaphragm, and the diaphragm can be stretched to a large extent without being broken or thinned.

[0005] To solve the above technical problems, one technical scheme of the utility model is provided: a kind of mould for 3D deep drawing diaphragm, comprising: upper die plate, load plate for bearing diaphragm, floating plate, flexible heating fixed plate, lower die plate arranged in sequence, mold core is arranged in floating plate, floating plate and mold core are slidingly matched, and the profiled surface matched with diaphragm is arranged on mold core, the profiled surface makes diaphragm reproduce 3D modeling to form product, the flexible heating fixed plate is opened with deep groove towards mold core, the distance of the bottom surface part of deep groove and the corresponding part of profiled surface surface is consistent, the flexible heating fixed plate extends with the heating fixed lug matched with deep groove, the heating fixed lug is opened with heating installation groove, the flexible heating rod is embedded in heating installation groove, and the height of the corresponding area between flexible heating rod and profiled surface product area is equidistant.

[0006] Preferably, the load plate is provided with an avoiding hole, and a plurality of positioning pins are arranged around the avoiding hole, the positioning pins pass through the edge of the diaphragm to limit the position of the diaphragm on the load plate.

[0007] Preferably, the two ends of the load plate are provided with pre-bending parts, and the shape of the surface of the pre-bending part is matched with the profiled surface, so that when the diaphragm is attached to the load plate, the diaphragm is pre-bent through the pre-bending part, and then the diaphragm is pre-formed.

[0008] Preferably, the carrier plate is movably arranged on the floating plate, and the floating plate is provided with an annular limiting flange matched with the inner diameter of the avoiding hole, and the annular limiting flange is used for limiting the position of the carrier plate on the floating plate when the carrier plate contacts the floating plate.

[0009] Preferably, the pre-bent part is formed with a positioning groove away from one side of the diaphragm, and the floating plate is axially extended with a positioning protrusion towards the positioning groove, and the positioning protrusion is matched with the positioning groove and used for limiting and positioning the position of the carrier plate on the floating plate.

[0010] Preferably, the upper die plate is provided with an air inlet hole, and the upper die plate is arranged on the carrier plate, and a sealed chamber is formed between the upper die plate and the carrier plate when the mold is closed, and the air inlet hole is communicated with the sealed chamber.

[0011] Preferably, a sealing ring is arranged between the upper die plate and the carrier plate, and the sealing ring is used for sealing the closed chamber when the mold is closed.

[0012] Preferably, a temperature sensor is vertically arranged on the lower die plate, and the temperature sensor is in contact with the mold core through the heating fixing block and used for monitoring the temperature of the mold core.

[0013] Preferably, an assembly groove is arranged on the lower die plate, and the flexible heating fixing plate is installed in the assembly groove.

[0014] Preferably, a side heat preservation plate is arranged on the side surface of the flexible heating fixing plate, and a bottom heat preservation plate is arranged on the bottom surface of the flexible heating fixing plate.

[0015] The beneficial effects of the utility model are:

[0016] 1. By making the specific parts between the flexible heating rod and the upper surface of the mold core equal, the heat is evenly transmitted to the surface of the mold core, and the diaphragm is heated more uniformly, especially the lower surface of the diaphragm, and the upper surface of the diaphragm is heated by the high-temperature and high-pressure gas acting on the diaphragm, so that the diaphragm is heated and the shape of the mold core is reproduced, and then the formed diaphragm is a product, and the problems such as cracking caused by uneven heating during 3D forming of the diaphragm are reduced. In addition, the temperature fluctuation in heating is very small;

[0017] 2. The film is pre-bent by the pre-bent part on the carrier plate when it is fixed on the carrier plate, so that the pre-bending is carried out in the cold state, and the film is pre-formed, and the bending of the film does not cause obvious change of the thickness of the film, and then the film is heated and molded, so that the stretching height of the film is reduced, and the pre-contoured bending reduces the stretching height to the lowest, so that the stretching height of the high-pressure and high-temperature air blowing in the last step will not be too high, so that the product with balanced thickness and high stretching is obtained. Compared with the traditional method, the mold technology can stretch the product (film) to a high depth, and the stretching height can reach 30mm-150mm. And the thickness change of the product (film) can be controlled within 10%, which breaks through the bottleneck problem of the IML process. In addition, the technology is reliable and stable in the production process, saves resources, reduces waste, improves efficiency and yield. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic diagram of the utility model;

[0019] Figure 2 is the exploded schematic diagram of the film in the utility model without bending;

[0020] Figure 3 is the exploded schematic diagram of the film pre-bent forming in the utility model;

[0021] Figure 4 is the exploded schematic diagram of the film completely formed in the utility model;

[0022] Figure 5 is the structure schematic diagram of the bottom surface of the mold core in the utility model.

[0023] The marks of the components in the drawings are as follows:

[0024] 1, upper die plate; 11, air inlet hole; 12, sealing ring;

[0025] 2, carrier plate; 21, avoiding hole; 22, positioning needle; 23, pre-bent part;

[0026] 3, floating plate; 31, annular limiting flange; 32, positioning protrusion;

[0027] 4, flexible heating fixing plate; 41, heating fixing block; 42, flexible heating rod; 43, side heat preservation plate;

[0028] 5, lower die plate; 51, temperature sensor;

[0029] 6, mold core; 61, imitated forming surface; 62, deep groove;

[0030] 7, film; 71, product. DETAILED DESCRIPTION

[0031] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific details set forth herein without departing from the scope of the present application. It should be noted that the present application is not limited to the specific embodiments described herein and that the specific embodiments are presented for purposes of example and illustration only.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature is "on", "above" and "above" the second feature, which can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "under", "below" and "below" the second feature, which can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0037] In the formula, the physical quantity, such as the basic unit of the International System of Units, should be understood as the basic quantity of the basic unit, or the derived quantity derived from the basic quantity by multiplication, division, differentiation or integration, etc. Mathematical operation.

[0038] Embodiment:

[0039] Reference Figures 1-5 A mold for 3D deep drawing film sheet, comprising: an upper mold plate 1, a carrier plate 2 for carrying a film sheet 7, a floating plate 3, a flexible heating fixed plate 4, and a lower mold plate 5 arranged in sequence, a mold core 6 is arranged in the floating plate 3, the floating plate 3 and the mold core 6 are in sliding fit, so that the floating plate 3 can be separated from the mold core 6, a simulated forming surface 61 cooperating with a product 71 needed to be formed on the film sheet 7 is opened on the mold core 6, the simulated forming surface 61 makes the film sheet 7 reproduce a 3D modeling to form part of the needed product 71, the mold core 6 is provided with a deep groove 62 towards the flexible heating fixed plate 4, the distance from the bottom surface part of the deep groove 62 to the corresponding part of the surface of the simulated forming surface 61 is consistent, the flexible heating fixed plate 4 extends a heating fixed protrusion 41 cooperating with the deep groove 62, a heating installation groove is opened on the heating fixed protrusion 41, a flexible heating rod 42 is embedded in the heating installation groove, the height distance between the corresponding areas of the flexible heating rod 42 to the simulated forming surface 61 product 71 area is equidistant, that is, the height distance of the flexible heating rod 42 to the surface of the simulated forming surface 61 of the mold core 6 is equidistant, so that the heat can be more uniformly and evenly radiated to the surface of the simulated forming surface 61 of the mold core 6, thereby more evenly and quickly heating the film sheet 7, especially the lower surface of the film sheet 7, thereby reducing the problem of rupture caused by uneven heating when the film sheet 7 is 3D formed.

[0040] Referring to Figures 2-4 , the carrier plate 2 is provided with an avoiding hole 21, and a plurality of positioning pins 22 are arranged around the avoiding hole 21, the positioning pins 22 pass through the long waist hole of the edge of the diaphragm 7 to limit the position of the diaphragm 7 on the carrier plate 2, so that the position of the diaphragm 7 on the carrier plate 2 is fixed by the positioning pins 22, and the diaphragm 7 can directly contact the formed forming surface 61 of the mold core 6 through the avoiding hole 21.

[0041] Referring to Figures 1-4 , the two ends of the carrier plate 2 are formed with a pre-bending part 23, and the surface shape of the pre-bending part 23 is matched with the formed forming surface 61, so that when the diaphragm 7 is attached to the carrier plate 2 and is pressed by the upper die plate 1, the diaphragm 7 is pre-bent at the two ends under the cooperation of the pre-bending part 23, and then the diaphragm 7 is pre-bent on the whole, so that the diaphragm 7 can be pre-formed. By pre-cold forming the diaphragm 7 without changing the thickness, that is, bending the diaphragm 7 to form a preliminary 3D shape in a cold state, the stretching amount of the diaphragm 7 when it is completely formed in the completely closed mold is reduced, so that the diaphragm 7 can be stretched more in the whole without wrinkles, cracks, and uneven thickness, and the thickness of the diaphragm 7 is not changed or changed little.

[0042] Referring to Figures 2-4 , in order to better fix the diaphragm 7 and better pre-form the diaphragm 7, the positioning pins 22 are also installed on the pre-bending part 23.

[0043] Referring to Figures 2-4 , the carrier plate 2 is movably placed on the floating plate 3, and the floating plate 3 extends an annular limiting flange 31 matched with the inner diameter of the avoiding hole 21, so that the floating plate 3 can block the avoiding hole 21 of the carrier plate 2 through the annular limiting flange 31, so that when the carrier plate 2 contacts the floating plate 3, the annular limiting flange 31 limits the position of the carrier plate 2 on the floating plate 3, and prevents the carrier plate 2 from shaking on the floating plate 3.

[0044] Referring to Figures 1-4 , the pre-bending part 23 is formed with a positioning groove away from the diaphragm 7, and the floating plate 3 extends a positioning protrusion 32 axially toward the positioning groove, and the positioning protrusion 32 cooperates with the positioning groove to further block and limit the position of the carrier plate 2 on the floating plate 3, and further increase the accuracy of the relative position between the carrier plate 2 and the floating plate 3.

[0045] Referring to Figures 1-4The upper die plate 1 is provided with an air inlet hole 11. The upper die plate 1 is arranged on the carrier plate 2. When the mold is closed, a sealed chamber is formed between the upper die plate 1 and the carrier plate 2. The air inlet hole 11 is in communication with the sealed chamber. The high-temperature and high-pressure gas enters the air inlet hole 11 and acts on the upper surface of the diaphragm 7. The diaphragm 7 is shaped into the shape of the molding surface 61 of the mold core 6 under the condition that the upper surface and the lower surface of the diaphragm 7 are heated. Thus, the required product 71 is formed. By heating the upper and lower surfaces of the diaphragm 7, the problem of cracking caused by uneven heating during 3D molding of the diaphragm 7 can be further reduced.

[0046] Reference Figure 4 In order to ensure the sealing property of the sealed chamber when the mold is closed and prevent the high-temperature and high-pressure gas from leaking, the upper die plate 1 and the carrier plate 2 are provided with a sealing ring 12. The sealing ring 12 is installed on the upper die plate 1. When the mold is closed, the sealing ring 12 is used to seal the sealed chamber.

[0047] Reference Figure 4 In order to further accurately control the temperature of the mold core 6, the lower die plate 5 is vertically provided with a temperature sensor 51. The temperature sensor 51 penetrates the heating fixing block and is in contact with the mold core 6. Thus, the actual temperature of the mold core 6 is monitored, and a signal is given to the flexible heating rod 42 to maintain or raise the temperature.

[0048] Reference Figure 4 The lower die plate 5 is provided with an assembly groove. The flexible heating fixing plate 4 is installed in the assembly groove. The side heat preservation plate 43 is screw-connected to the side periphery of the flexible heating fixing plate 4. The bottom heat preservation plate is installed on the bottom surface of the flexible heating fixing plate 4. Thus, the temperature conduction of the mold core 6 is insulated. Therefore, the temperature fluctuation of the surface of the mold core 6 is very small. The stability of the diaphragm 7 is further ensured.

[0049] The mold assembly process is as follows: The side heat preservation plate 43 and the bottom heat preservation plate are installed at the corresponding positions of the flexible heating fixing plate 4. The flexible heating rod 42 is installed on the flexible heating fixing plate 4. The temperature sensor 51 is installed on the lower die plate 5. The flexible heating fixing plate 4 is installed on the lower die plate 5. The mold core 6 and the floating plate 3 are installed on the lower die plate 5. Thus, the lower half of the mold is completely installed. Then, the sealing ring 12 is assembled on the upper die plate 1. This is the upper half of the mold. Finally, the carrier plate 2 is installed on the molding machine support.

[0050] The film sheet forming process: the film sheet 7 is fixed on the carrier plate 2 through the positioning needle 22, and is pre-bent and formed through the pre-bent part 23, then the carrier plate 2 carrying the film sheet 7 is placed on the floating plate 3, when the mold is closed, the film sheet 7 is further cold pre-formed in the process of being pressed by the upper mold plate 1 on the film sheet 7, thereby reducing the height of the subsequent stretching in the hot forming process, after the mold is closed, the high-temperature and high-pressure gas enters through the gas inlet hole 11 of the upper mold plate 1 and acts on the upper surface of the film sheet 7, and under the cooperation of the mold core 6 synchronously heating the film sheet 7, the film sheet 7 is formed into the shape of the imitation forming surface of the mold core 6, then the high-temperature and high-pressure gas is disconnected and the mold is opened, the carrier plate 2 carrying the formed film sheet 7 is separated from the mold core 6, the required product 71 is separated from the formed film sheet 7, thereby obtaining the product 71 body.

[0051] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A mold for a 3D deep-drawn membrane, characterized in that, The utility model relates to a kind of 3D film forming device, including: Upper die plate (1) sequentially arranged, carrier plate (2) for carrying diaphragm (7), floating plate (3), flexible heating fixed plate (4), lower die plate (5), the floating plate (3) is provided with mold core (6) in it, the floating plate (3) and mold core (6) sliding fit, the mold core (6) is provided with with diaphragm (7) cooperation's imitative forming surface (61), the imitative forming surface (61) makes diaphragm (7) copy 3D modeling to form product (71) thus, the mold core (6) is opened with deep groove (62) towards flexible heating fixed plate (4), the distance of the bottom surface portion of deep groove (62) and the corresponding portion of imitative forming surface (61) surface is consistent, flexible heating fixed plate (4) extends with heating fixed bump (41) cooperation's deep groove (62), heating fixed bump (41) is opened with heating installation groove, flexible heating rod (42) is embedded in heating installation groove, the height of corresponding area between flexible heating rod (42) and imitative forming surface (61) forming product (71) area is equidistant.

2. A mold for 3D deep drawn membrane according to claim 1, characterized in that: The carrier plate (2) is provided with an avoiding hole (21), and a plurality of positioning needles (22) are arranged around the avoiding hole (21). The positioning needles (22) pass through the edge of the diaphragm (7) to limit the position of the diaphragm (7) on the carrier plate (2).

3. A mold for 3D deep drawn membrane according to claim 2, characterized in that: The carrier plate (2) is provided with a pre-bending part (23) at both ends. The shape of the surface of the pre-bending part (23) is matched with the imitative forming surface (61), so that when the diaphragm (7) is attached to the carrier plate (2), the diaphragm (7) is pre-bent by the pre-bending part (23), and the diaphragm (7) is pre-formed.

4. A mold for 3D deep drawn membrane according to claim 3, characterized in that: The carrier plate (2) is movably arranged on the floating plate (3). The floating plate (3) is provided with an annular limiting flange (31) matched with the inner diameter of the avoiding hole (21). When the carrier plate (2) is in contact with the floating plate (3), the annular limiting flange (31) is used to limit the position of the carrier plate (2) on the floating plate (3).

5. A mold for 3D deep drawn membrane according to claim 3 or 4, characterized in that: The pre-bending part (23) is formed with a positioning groove on the side away from the diaphragm (7). The floating plate (3) extends axially towards the positioning groove and is provided with a positioning protrusion (32). The positioning protrusion (32) is matched with the positioning groove to limit and position the carrier plate (2) on the floating plate (3).

6. The mold for 3D deep drawn membrane according to claim 1, characterized in that: The upper die plate (1) is provided with an air inlet hole (11). The upper die plate (1) is arranged on the carrier plate (2). When the mold is closed, a sealed chamber is formed between the upper die plate (1) and the carrier plate (2). The air inlet hole (11) is in communication with the sealed chamber.

7. A mold for 3D deep drawn membrane according to claim 6, characterized in that: A sealing ring (12) is arranged between the upper die plate (1) and the carrier plate (2). When the mold is closed, the sealing ring (12) is used to seal the closed chamber.

8. The mold for 3D deep drawn membrane according to claim 1, characterized in that: The lower die plate (5) is vertically provided with a temperature sensor (51). The temperature sensor (51) penetrates the heating fixed block and is in contact with the mold core (6) to monitor the temperature of the mold core (6).

9. The mold for 3D deep drawn membrane according to claim 1, characterized in that: The lower die plate (5) is provided with an assembly groove. The flexible heating fixed plate (4) is installed in the assembly groove.

10. The mold for 3D deep-drawn membrane according to claim 1 or 9, characterized in that: The side heat preservation plate (43) is arranged on the side periphery of the flexible heating fixing plate (4), and the bottom heat preservation plate is arranged on the bottom of the flexible heating fixing plate (4).

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