CN212920527U

CN212920527U - Integrated datum plane positioning structure of RTM (resin transfer molding) mold of ultrathin special-shaped curved surface shell

Info

Publication number: CN212920527U
Application number: CN202022130162.0U
Authority: CN
Inventors: 陈光伟; 张策; 张国利; 陈利
Original assignee: Tianjin Polytechnic University
Current assignee: Tianjin Polytechnic University
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-04-09
Anticipated expiration: 2030-09-25

Abstract

The invention provides an integrated datum plane positioning structure of an RTM (resin transfer molding) die for an ultrathin special-shaped curved surface shell, which solves the technical problem of composite material process manufacturing that the thickness, the profile precision and the appearance size precision of the ultrathin curved surface shell are low. The positioning structure comprises a frame type positioning structure and a male die bidirectional positioning structure, and the two positioning structures are used for positioning an integrated datum plane by a positioning plate; the frame type positioning structure comprises a positioning frame; a positioning platform is arranged in the middle of the positioning plate; the positioning platform is provided with an inner group of positioning reference surfaces and an outer group of positioning reference surfaces and has a bidirectional positioning function of a positioning male die and a positioning frame; when the female die of the curved surface shell is assembled and positioned through the positioning frame, the installation angle of the die can be effectively adjusted, so that the female die and the die are accurately positioned, and the problem of overlarge and undersize die cavities caused by inaccurate positioning is reduced. The die has high positioning precision and can be applied to the fields of aviation curved surface shell parts, automobile appearance shells, helmets and the like.

Description

Integrated datum plane positioning structure of RTM (resin transfer molding) mold of ultrathin special-shaped curved surface shell

Technical Field

The utility model relates to a resin matrix combined material mould design and manufacturing technical field, in particular to ultra-thin special-shaped curved surface casing RTM mould integral type reference surface location structure.

Background

The existing curved surface shell forming die generally comprises a male die, a female die and a guide post, wherein the male die and the female die can move up and down relatively under the guide of the guide post, a sealed cavity is formed between the male die and the female die, and an injection molding machine injects injection molding materials into a hot flow channel and then flows into the sealed cavity to finally form the special-shaped curved surface shell. The curved surface shell forming die is used as a precise tool, and whether the positioning structure device is related reasonably or not has important influence on the quality of a final curved surface shell finished product.

With the change of the application environment of the special-shaped curved surface shell, the existing special-shaped curved surface shell is endowed with multiple functions, so that the structural design of the shell is more and more complex, and the surface of the special-shaped curved surface shell is provided with a plurality of bulges or depressions. On the one hand, the fabric can slide to become thick and even wrinkle in the die assembly process, raw materials are unevenly distributed, the curved surface shell produced by a plurality of curved surface shell dies needs to spend a large amount of time for secondary processing, and the time and the labor cost are increased. On the other hand, the curved surface shell structure is complicated, so the female die needs to be designed into a split combined female die structure.

For the ultrathin special-shaped curved surface shell, the positioning of the die is particularly important, and when the deviation of the positioning structure is small, the thickness, the profile precision and the overall dimension precision of the shell are seriously influenced. At present, a pin is commonly used for positioning in a positioning mode, and the pin can be loosened in the use process of a pin positioning die, so that the positioning of the die is inaccurate, the assembly precision of a curved surface shell is influenced, and the final thickness, the profile precision and the overall dimension precision of the curved surface shell are low. Meanwhile, the pin is easy to deform in the using process due to the influence of the environment, so that the mould is staggered when being closed, the abrasion of the mould is increased, and the mould is easy to damage.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the above-mentioned prior art, the utility model aims at providing an ultra-thin special-shaped curved surface casing RTM mould integral type reference surface location structure. The positioning structure can realize accurate positioning and installation of the male die and the female die of the die, eliminate the problems of low thickness, profile precision and overall dimension precision caused by inaccurate positioning in the die assembly process of the die, and reduce time and labor cost.

In order to realize the purpose, the technical scheme of the utility model is that:

an integrated datum plane positioning structure of an RTM (resin transfer molding) mold of an ultrathin special-shaped curved surface shell comprises a frame type positioning structure and a male mold bidirectional positioning structure, wherein the two positioning structures are used for positioning the integrated datum plane through a positioning plate; the frame type positioning structure comprises a positioning frame; a positioning platform is arranged in the middle of the positioning plate; the positioning platform is provided with an inner group of positioning reference surfaces and an outer group of positioning reference surfaces which are respectively used for positioning the male die and the positioning frame; and the female die of the curved surface shell is assembled and positioned through the positioning frame, and a cavity matched with the curved surface shell is formed between the female die and the die core.

Furthermore, the male die is a combined male die and is provided with a male die mounting table.

Furthermore, the upper half part of the middle mold core of the combined male mold is provided with an annular groove which is positioned and installed with other male molds and is used for positioning and locking the top of the male molds.

The annular groove is formed in the middle mold core, so that other male molds can be tightly locked, the problem that the male molds are low in positioning accuracy due to the fact that the center of gravity of the male molds is loose outwards is solved, and the dual functions of locking and positioning of the tops of the male molds are achieved.

Furthermore, a male die positioning reference surface group is arranged in the positioning platform and used for positioning and mounting a male die mounting table at the bottom of the male die.

The male die positioning reference surface group is arranged in the positioning platform, so that the problems of positioning installation and outward loosening of the bottom of the male die are solved.

Furthermore, a positioning frame positioning datum plane group is arranged outside the positioning platform and used for positioning and installing the positioning frame.

The frame type positioning structure is matched with the positioning datum plane outside the positioning platform, so that the integral datum plane of the male die and the positioning frame is positioned under the positioning action of the positioning plate.

Further, the bottom of the positioning frame may be one of a quadrangle, a pentagon and a hexagon.

Furthermore, the positioning frame and the positioning plate, the male die mounting table and the positioning plate, and the female die and the positioning frame are provided with corresponding mounting guide inclined planes, and the inclination angle is 2-5 degrees.

Through setting up the same installation direction inclined plane looks inclination, can the locating frame with locating plate, positive mould mount table and locating plate, the bed die with the inclined plane cooperation that the locating frame corresponds, play direction and location effect, avoid the mould off tracking.

To sum up, the utility model discloses owing to take above technical scheme, have following beneficial effect:

firstly, the male die is accurately positioned, the male die is used for locking and positioning the top of the male die through an annular groove of a middle die core, and a positioning reference surface group is used for positioning the bottom of the male die through a positioning frame of a positioning platform, so that the male die is of a bidirectional positioning structure, and the male die is accurately positioned.

Secondly, the female die is accurately positioned, the positioning frame can effectively position the position of the male die in the die, and the female die mounted through the positioning frame can effectively adjust the mounting angle of the die and accurately position the die, so that the produced curved surface shell is stable in structure.

And thirdly, a split combined female die structure is adopted, the die assembly of the curved surface shell is set to be in multiple directions, the phenomena of uneven thickness and wrinkles caused by slippage of the fabric can be effectively reduced or avoided, the forming quality of the curved surface shell is effectively guaranteed, and the split combined female die structure is suitable for producing curved surface shells with complex structures.

Drawings

Fig. 1 is the utility model discloses ultra-thin special-shaped curved surface casing RTM mould integral type reference surface location structure's formpiston structure explosion sketch map.

Fig. 2 is the utility model discloses ultra-thin special-shaped curved surface casing RTM mould integral type reference surface location structure's locating plate schematic diagram.

Fig. 3 is the utility model discloses ultra-thin special-shaped curved surface casing RTM mould integral type reference surface location structure's location frame structure sketch.

Fig. 4 is a schematic view of a split combined female mold structure provided in the embodiment of the present invention.

Fig. 5 is a schematic view of the overall assembly of the mold according to an embodiment of the present invention.

Reference numbers in the figures:

1 is a combined male die, and 101 is a male die mounting table; 102, installing a guide inclined plane for the male die; 103 is an intermediate mold core; 104 is an annular groove; 2 is a positioning plate; 201 is a positioning platform; 202 is a male die positioning reference surface group; 203, positioning a reference surface group for the positioning frame; 3 is a positioning frame; 301 is a positioning frame threaded hole; 302 is a guide inclined plane for installing the positioning frame; 303 is a sealing groove; 4 is a structural schematic diagram of a split combined female die; 401 is the left anterior mold; 402 is the right anterior mold; 403 is the left die; 404 is the right module; 405 is the left rear module; 406 is the right rear mold; and 407 is an upper die.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.

As shown in fig. 1 to 3, the integrated datum plane positioning structure of the RTM mold for the ultra-thin special-shaped curved shell according to the present invention includes a male mold bidirectional positioning structure and a frame type positioning structure; the two-way male die positioning structure relates to a combined male die 1 and a positioning plate 2, and the frame type positioning structure relates to the positioning plate 2, a positioning frame 3 and a split combined female die 4. The male die is of a combined structure, a male die mounting platform 101 is arranged at the bottom of the male die, a male die mounting guide inclined plane 102 is arranged on the side surface of the male die mounting platform 101, an intermediate die core 103 is arranged in the middle of the male die, and an annular groove 104 is formed in the upper half part of the intermediate die core 103 and used for locking and top positioning of the male die 1; the middle of the positioning plate 2 is provided with a positioning platform 201, and the periphery inside the positioning platform 201 is provided with a male die positioning reference surface group 202 for positioning and mounting the bottom of the male die. A positioning frame positioning reference surface group 203 is arranged outside the positioning platform 201 and used for positioning and mounting the positioning frame; each side of the positioning frame 3 is provided with a threaded hole 301 used for being mounted with the female die, each side is provided with a positioning frame mounting guide inclined surface 302, and each mounting surface of the positioning frame 3 is provided with a sealing groove 303. Fig. 4 to 5 are schematic diagrams illustrating the die cavity block 4 and the overall assembly of the cavity block after the cavity block is assembled by the cavity block positioning structure device according to an embodiment of the present invention. The surface structure of the combined male die 1 is complex, the surface of the combined male die is provided with a plurality of bulges and depressions, and the female die 4 mainly comprises a left front die 401, a right front die 402, a left die 403, a right die 404, a left rear die 405, a right rear die 406 and an upper die 407. The split combined female die 4 is assembled and positioned through the positioning frame 3, and a curved surface shell cavity matched with the curved surface shell is formed between the split combined female die and the combined male die 1.

In a preferred embodiment, the modular male mold 1 is positioned and locked at the top by the annular groove 104 of the intermediate mold core 103, preventing the modular male mold 1 from being loose due to the outward center of gravity.

In a preferred embodiment, the included angle between the male die installation guide inclined plane 102 of the male die installation platform 101 and the vertical direction is 2 degrees, which is convenient for the installation of the combined male die 1, the male die installation platform 101 at the bottom of the male die is positioned through the male die positioning reference plane group 202 in the positioning platform 201, and the positioning platform 201 can accurately position the male die 1 and the middle die core 103 in the die to complete the bidirectional positioning of the top and the bottom of the male die.

In a preferred embodiment, the inclination angles of the positioning frame installation guide inclined planes 302 corresponding to the positioning frame 3 and the positioning plate 2, and the positioning frame 3 and the female die 4 are both 2 °, the positioning frame 3 is positioned and installed through the positioning frame positioning reference plane group 302 outside the positioning platform 201, and the positioning platform 201 can simultaneously complete the positioning and installation of the male die 1 and the positioning frame 3, and is a single reference positioning structure.

In a preferred embodiment, after the positioning frame 3 is installed above the positioning plate 2 along the positioning frame installation guide inclined plane 302, the seven separate female dies such as the left front die 401, the right front die 402, the left die 403, the right die 404, the left rear die 405, the right rear die 406, the upper die 407 and the like are sequentially subjected to die assembly positioning along the positioning frame installation guide inclined plane 302 of the positioning frame 3, when the five separate female dies perform die assembly action through the positioning frame 3, the installation guide inclined plane of the female die 4 can be matched with the installation guide inclined plane 302 corresponding to the positioning frame 3, the installation angle of the female die is effectively adjusted and the female die is accurately positioned, the positioning frame 3 plays a role in guiding and positioning, the deviation of the die can be effectively avoided, and the phenomena of uneven thickness and wrinkles caused by the slippage of fabrics are reduced or avoided.

In a preferred embodiment, when the five female parting dies are completely contacted with the positioning frame 3, the female parting dies reach the designated limit position of the die, and then the female split combined die 4 and the positioning frame 3 are fixed through the threaded holes 301 of the positioning frame, so that the die assembly process is completed.

Claims

1. An integrated datum plane positioning structure of an RTM (resin transfer molding) mold of an ultrathin special-shaped curved surface shell is characterized by comprising a frame type positioning structure and a male mold bidirectional positioning structure, wherein the two positioning structures are used for positioning the integrated datum plane through a positioning plate; the frame type positioning structure comprises a positioning frame; a positioning platform is arranged in the middle of the positioning plate; the positioning platform is provided with an inner group of positioning reference surfaces and an outer group of positioning reference surfaces which are used for respectively positioning the male die and the positioning frame; and the female die of the curved surface shell is assembled and positioned through the positioning frame, and a cavity matched with the curved surface shell is formed between the female die and the die core.

2. The integrated datum plane positioning structure of the ultra-thin profiled curved surface shell RTM mold of claim 1, wherein the male mold is a combined male mold and is provided with a male mold mounting table.

3. The integrated reference surface positioning structure of the ultra-thin profiled curved surface shell RTM mold of claim 2, wherein the upper half part of the middle mold core of the combined male mold is provided with an annular groove positioned and installed with other male molds for positioning and locking the top of the male molds.

4. The integrated reference surface positioning structure of the ultra-thin profiled curved surface shell RTM mold of claim 1, wherein a male mold positioning reference surface group is arranged inside the positioning platform and used for positioning and mounting a male mold mounting table at the bottom of a male mold.

5. The integrated datum plane positioning structure of the ultra-thin profiled curved surface shell RTM mold of claim 1, wherein a positioning frame positioning datum plane group is arranged outside the positioning platform and used for positioning and installing a positioning frame.

6. The integrated reference surface positioning structure of the ultra-thin profiled curved surface shell RTM mold of claim 1, wherein the bottom of the positioning frame may be one of a quadrangle, a pentagon and a hexagon.

7. The integrated datum plane positioning structure of the ultra-thin profiled curved surface shell RTM mold of claim 1, wherein the positioning frame and the positioning plate, the male mold mounting table and the positioning plate, and the female mold and the positioning frame are provided with corresponding mounting guide inclined planes, and the inclination angle is 2-5 °.