CN111873381A

CN111873381A - Improved diaphragm high-pressure forming die

Info

Publication number: CN111873381A
Application number: CN202010845779.2A
Authority: CN
Inventors: 曹祖铭
Original assignee: Shenzhen Yimingyue Technology Co ltd
Current assignee: Shenzhen Yimingyue Technology Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-11-03

Abstract

The invention discloses an improved diaphragm high-pressure forming die, which belongs to a diaphragm forming die, and comprises a pressing plate and a lower template, wherein the pressing plate is arranged at the upper part of the lower template, the lower template is provided with a forming cavity, and the pressing plate is provided with a through groove corresponding to the forming cavity; the upper part of the pressing plate is also provided with a panel; the panel is also provided with a high-pressure air hole; the lower part of the lower template is also provided with a lower die base plate, the lower die base plate and the lower template are respectively provided with a corresponding seat groove, a die core is installed in the seat groove, the upper part of the die core is provided with a horizontally arranged die core exhaust surface, and the die core exhaust surface is provided with a plurality of exhaust holes. The forming part of the die is designed into a structural form combining a panel, the panel and a lower die plate, so that the positions of the forming parts in the die are adjustable in the forming process of the diaphragm, the geometric shape of a product can be disassembled under the action of different die cores, the geometric disassembling and forming of the product can be completed, the exhaust surface of the horizontally arranged die core on the die core is convenient for exhausting, and the air trapping phenomenon is avoided.

Description

Improved diaphragm high-pressure forming die

Technical Field

The invention relates to a diaphragm forming die, in particular to an improved diaphragm high-pressure forming die.

Background

In the industries of IML, IMD, IMT, IMF and the like, most of the high-pressure forming dies used at present adopt a machine die holder heating pipe for heating and then conducting the heated heat to the dies; the diaphragm is heated by an outer ceramic heating brick or an IR lamp radiation baking tray, or the diaphragm is heated to 200-300 ℃ instantly by adopting an inner ceramic heating brick or an IR lamp radiation heating mode; after the die is closed, high-pressure air is blown from the upper die to act on the surface of the membrane so that the membrane is attached to the lower die, and stretching and molding are carried out by taking the shape of the lower die as a mold, and finally a membrane product with a certain shape is obtained. However, the above-mentioned method can only be used for forming simple parts, and the forming stress cannot be released, and it is difficult to achieve the forming of reverse wrapping, high stretching and the forming of the same product with various geometric shapes. The radiation of the template and the baking tray is large enough to ensure high energy consumption of workshop operation; the phenomena of bulge, R-angle cracking, orange peel and the like caused by too large residual stress, uneven stretching, warping deformation and air trapping of the product during molding become the bottleneck of the traditional high-pressure molding. Therefore, further research and improvement on the structure of such a mold are needed.

Disclosure of Invention

One of the objectives of the present invention is to provide an improved membrane high pressure forming mold, so as to solve the technical problems of residual stress, uneven stretching, warping deformation, air trapping, and the like in the membrane forming process of the similar mold in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides an improved membrane high-pressure forming die which comprises a pressing plate and a lower template, wherein the pressing plate is arranged at the upper part of the lower template, the lower template is provided with a forming cavity, and the pressing plate is provided with a through groove corresponding to the forming cavity; the upper part of the pressing plate is also provided with a panel which is used for forming a closed space by respectively closely contacting the upper part and the lower part of the pressing plate with the panel and the lower template; the panel is also provided with a high-pressure air hole; the lower part of the lower template is also provided with a lower die base plate, the lower die base plate and the lower template are both provided with corresponding seat grooves, a die core is arranged in each seat groove, the upper part of the die core is provided with a horizontally arranged die core exhaust surface, and the die core exhaust surface is provided with a plurality of exhaust holes; and one side of the lower die base plate is provided with a hydraulic cylinder power system for enabling the die core to move up and down.

Preferably, the further technical scheme is as follows: the lower die plate and the seat groove on the lower die base plate are arranged in the middle, and a cavity is formed around the seat groove of the lower die plate.

The further technical scheme is as follows: the panel, the pressing plate and the lower template are pressed and fixed into a whole through the clamping force of the machine table.

The further technical scheme is as follows: the height of the mold core exhaust surface of the mold core is higher than the bottommost part of the molding cavity.

The further technical scheme is as follows: the lower die base plate is arranged on the bottom plate.

The further technical scheme is as follows: any one or more of the panel, the pressing plate, the lower die base plate, the bottom plate and the die core is/are internally provided with a heating device, and an electrode of the heating device is connected with a power supply.

Compared with the prior art, the invention has the following beneficial effects: the forming part of the die is designed into a structure form of combining a panel, a pressing plate, a lower die plate, a die core and a die core exhaust surface piece, so that the positions of all forming parts in the die can be adjusted in the forming process of the diaphragm, the geometric shape of a product can be disassembled under the action of different die cores, the geometric disassembling and forming of the product can be completed, the exhaust surface of the horizontally arranged die core on the die core is convenient for exhausting, and the air trapping phenomenon is avoided; the device in the die is heated automatically, so that the temperature of the die can be controlled accurately through local heating, the problem that the temperature of the membrane rapidly drops after the heating baking tray is removed in the same die is solved, the self-heating mode of the die is more beneficial to membrane shape payment, pressure setting is continuously carried out through high-pressure air after the shape payment is finished, and stress release is finished by matching the temperature of the die.

Drawings

FIG. 1 is a schematic structural diagram for illustrating one embodiment of the present invention;

in the figure, 1 is a pressing plate, 11 is a through groove, 2 is a lower template, 3 is a panel, 4 is a lower die backing plate, 5 is a die core, 51 is a die core exhaust surface, 6 is a bottom plate, and 7 is a hydraulic cylinder power system.

Detailed Description

The invention is further elucidated with reference to the drawing.

Referring to fig. 1, an embodiment of the present invention is an improved membrane high pressure forming mold, which includes a pressing plate 1 and a lower mold plate 2, wherein the pressing plate 1 is disposed on the upper portion of the lower mold plate 2, and the lower mold plate 2 has a forming cavity, through which the membrane can be shaped, and the pressing plate 1 can press the edge of the membrane, and the pressing plate 1 has a through groove 11 corresponding to the forming cavity to avoid affecting the membrane forming; more importantly, the upper part of the pressing plate 1 is also provided with a panel 3 which is used for forming a closed space by respectively closely contacting the upper part and the lower part of the pressing plate 1 with the panel 3 and the lower template 2 so that the membrane can be molded and shaped in the closed space; therefore, the panel 3 is also provided with a high-pressure air hole which can be communicated with an external high-pressure air source; meanwhile, in order to facilitate the installation of the lower template 2, a lower template pad 4 can be further designed at the lower part of the lower template 2, corresponding seat grooves are formed in the lower template pad 4 and the lower template 2, then a mold core 5 is installed in the seat grooves, a horizontally-arranged mold core exhaust surface 51 can be designed at the upper part of the mold core 5 in order to facilitate high-pressure exhaust, a plurality of exhaust holes need to be formed in the mold core exhaust surface 51, and residual gas at the lower part of the membrane can be exhausted from the exhaust holes in the membrane forming process, so that the membrane can be continuously positioned in the closed cavity for shaping; preferably, the height of the mold core venting surface 51 of the mold core 5 is higher than the bottom of the molding cavity, so as to prevent the mold core venting surface 51 from affecting the molding of the diaphragm, and also prevent the mold core venting surface 51 from affecting the force exerted by the air pressure in the closed space on the diaphragm, as shown in fig. 1, a hydraulic cylinder power system 7 is further provided on one side of the lower mold backing plate 4, and the hydraulic cylinder power system 7 is used for driving the mold core 51 to move up and down

As another great improvement of the present invention, in order to further reduce the internal stress of the membrane after the form-fitting is completed, i.e. to avoid rapid temperature reduction after the temperature of the membrane is raised, any one or more of the panel 3, the pressing plate 1, the lower die plate 2, the lower die backing plate 4, the bottom plate 6 and the die core 5 may be provided with a built-in heating device according to different conditions, and the heating devices are all connected to a power supply, and the control module can control the start/stop and the operation power of each heating device.

In the embodiment, the forming part of the die is designed into a structure form combining the panel 3, the pressing plate 1, the lower die plate 2, the die core 5 and the die core exhaust surface 51, so that the positions of the forming parts in the die can be adjusted in the forming process of the diaphragm, the geometric shape of a product can be disassembled under different die core actions, the geometric disassembling and forming of the product can be completed, the exhaust surface of the horizontally arranged die core on the die core is convenient for exhausting, and the phenomenon of air trapping is avoided; the device in the mould is self-heating, so that the temperature of the mould can be accurately controlled by local heating, the problem that the temperature of the membrane rapidly drops after the heating baking tray is removed in the similar mould is solved, the self-heating mode of the mould is more beneficial to membrane shape-putting, the pressure setting is continuously carried out through high-pressure air after the shape-putting is finished, and the stress release is finished by matching the temperature of the mould.

Based on the above embodiment, the inventor has also optimized the structure of the above-mentioned diaphragm high pressure forming die, specifically for all designing the seat groove on lower bolster 2 and lower backing plate 4 at the middle part to make the seat groove of lower bolster 2 form foretell die cavity all around, thereby further promote the fashioned precision of diaphragm. Meanwhile, in order to facilitate disassembly, the panel 3, the pressing plate 1 and the lower template 2 can be pressed and fixed into a whole through the machine table locking force, so that the three are pressed and fixed into a closed space through the machine table locking force.

Referring to fig. 1, in practical use, the above preferred embodiment of the present invention opens the mold, places the film to be formed on the lower mold plate 2, presses the edge of the film with the pressing plate 1, and places and locks the upper mold plate 3 to form a closed space; utilize the heating device in the mould to heat the diaphragm simultaneously, after the diaphragm temperature reached certain temperature, let in high-pressure air by the high-pressure gas pocket on the panel 3, form atmospheric pressure in airtight space for the diaphragm is impressed the shaping in the shaping chamber of lower bolster 2 under the atmospheric pressure effect, last giving after the shaping is accomplished presses the design, also can get rid of the residual gas of diaphragm lower part through mold core exhaust face 51 on the mold core 5, because the height of mold core exhaust face 51 is higher than the bottommost in shaping chamber this moment, consequently the exhaust can not cause the influence to the diaphragm after the type is accomplished. The stress release of the shaped diaphragm is completed by the temperature of the die.

In the invention, the problem that the temperature of the sheet material is rapidly reduced after the baking tray is removed in the traditional heating mode is solved, the die is locally heated, and the temperature of the precise part is controllable; in the molding process, the heat energy of the mold is utilized to make the membrane more beneficial to shape payment, and the shape payment is completed to continuously press and shape; the temperature of the mould is utilized in the shaping and setting processes, and the stress releasing process is also realized. The position of the movable mould core of the main molding part is adjustable in the molding process: and the mold core of the mold moves according to a preset position by utilizing a specially designed power system, so that the geometric shape of the product is disassembled under the action of different mold cores, and the geometric disassembling and molding of the product is completed. Meanwhile, the technologies of 3D printing exhaust inserts, exhaust steel and the like are introduced into the field of high-pressure forming dies, and the problems that high-pressure exhaust is difficult, local fine structures are difficult to form or the sizes, shapes and models are different are solved.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. The utility model provides a modified diaphragm high pressure forming die which characterized in that: the forming die comprises a pressing plate (1) and a lower template (2), the pressing plate (1) is arranged on the upper portion of the lower template (2), the lower template (2) is provided with a forming cavity, and the pressing plate (1) is provided with a through groove (11) corresponding to the forming cavity;

the upper part of the pressing plate (1) is also provided with a panel (3) which is used for forming a closed space by respectively and tightly contacting the upper part and the lower part of the pressing plate (1) with the panel (3) and the lower template (2); the panel (3) is also provided with a high-pressure air hole;

the lower die plate (2) is also provided with a lower die base plate (4), the lower die base plate (4) and the lower die plate (2) are respectively provided with corresponding seat grooves, a die core (5) is installed in each seat groove, the upper part of the die core (5) is provided with a horizontally arranged die core exhaust surface (51), and the die core exhaust surface (51) is provided with a plurality of exhaust holes; and a hydraulic cylinder power system (7) is arranged on one side of the lower die base plate (4) and is used for enabling the die core (51) to move up and down.

2. The improved die for high-pressure molding of a membrane as claimed in claim 1, wherein: the lower die plate (2) and the seat groove on the lower die base plate (4) are arranged in the middle, and a cavity is formed around the seat groove of the lower die plate (2).

3. The improved die for high-pressure molding of a membrane as claimed in claim 1, wherein: the panel (3), the pressing plate (1) and the lower template (2) are pressed and fixed into a whole through the machine table locking force.

4. The improved die for high-pressure molding of a film sheet as claimed in claim 1 or 2, wherein: the height of a mold core exhaust surface (51) of the mold core (5) is higher than the bottommost part of the molding cavity.

5. The improved die for high-pressure molding of a membrane as claimed in claim 1, wherein: the lower die base plate (4) is arranged on the bottom plate (6).

6. The improved die for high-pressure molding of a membrane according to claim 5, wherein: any one or more of the panel (3), the pressing plate (1), the lower template (2), the lower die base plate (4), the bottom plate (6) and the die core (5) are internally provided with heating devices, and electrodes of the heating devices are connected with a power supply.