CN216400259U - Hot-pressing precision micro-forming device - Google Patents

Abstract

The application relates to a hot-pressing precision micro-forming device. This application the accurate micro-forming device of hot pressing include: a hot-pressing precision micro-forming device comprises a hot air supply device, a hot air hose, a lifting device, a mold core, a copper pressing plate and a bracket; the support comprises support columns and a top plate, the top plate is transversely arranged, and the support columns are vertically arranged and fixedly installed on the bottom surface of the top plate respectively; the lifting device is movably mounted on the supporting column in a limiting manner and can lift relative to the supporting column; the mold core is arranged on the bottom surface of the top plate; the copper pressing plate is arranged on the top surface of the lifting device and is arranged below the mold core; the hot air supply device is arranged on one side of the bracket; micropores are formed on the upper surface of the copper pressing plate. The application the precise hot-pressing micro-forming device has the advantages of being capable of rapidly and directly heating/cooling the workpiece, and being energy-saving and efficient.

Description

Hot-pressing precision micro-forming device

Technical Field

The application relates to a micro-structure forming device, in particular to a hot-pressing precise micro-forming device.

Background

The optical micro-lens has the advantages of high integration level, small volume, light weight and the like, and is widely applied to optoelectronic systems, imaging systems and sensor systems. The method is suitable for optical micro-lenses at present, and effective methods for mass production of the optical micro-lenses are hot stamping forming, injection molding forming and the like; for hot press molding, the hot press micro-molding process in the prior art needs to heat a micro-structure mold core based on a resistance thermal effect, cools the mold core by water circulation, repeatedly and indirectly controls the temperature of a workpiece by using the temperature of the mold core, realizes micro-molding under high pressure, but causes the problem that the workpiece is heated unevenly due to uneven distribution of resistance and water pipes, and often accompanies the problem of long production cycle, thereby causing low production efficiency and high energy consumption.

SUMMERY OF THE UTILITY MODEL

Based on this, the purpose of this application lies in, provides the accurate little forming device of hot pressing, and it has thereby the convenient processing raises the advantage of efficiency and energy-conservation.

One aspect of the application provides a hot-pressing precision micro-forming device, which comprises a hot air supply device, a hot air hose, a lifting device, a mold core, a copper pressing plate and a support;

the support comprises support columns and a top plate, the top plate is transversely arranged, and the support columns are vertically arranged and fixedly installed on the bottom surface of the top plate respectively;

the lifting device is movably mounted on the supporting column in a limiting manner and can lift relative to the supporting column;

the mold core is arranged on the bottom surface of the top plate;

the copper pressing plate is arranged on the top surface of the lifting device and is arranged below the mold core;

one end of the hot air hose is connected to the middle part of the lifting device, the pipe orifice of the hot air hose is arranged below the copper pressing plate, and the other end of the hot air hose is connected with the hot air supply device;

the hot air supply device is arranged on one side of the bracket;

micropores are formed on the upper surface of the copper pressing plate.

According to the hot-pressing precision micro-forming device, the hot air supply device is arranged, and the middle part of the lifting device is connected with the hot air supply device through the hot air hose, so that hot air is directly blown out from the middle part of the lifting device and is heated on the copper pressing plate in an impact manner; the workpiece is placed on the copper pressing plate, and is driven by the lifting device to ascend and extrude on the surface of the mold core, so that the workpiece is subjected to micro extrusion forming by utilizing micropores on the surface of the copper pressing plate under the double extrusion of the copper pressing plate and the mold core, and a micro-convex structure is processed on the lower surface of the workpiece. In the process of extrusion forming of the workpiece, the workpiece is directly heated by directly impacting hot air on a copper pressing plate; and after the workpiece is heated, the hot air supply is closed or the air flow temperature is reduced, so that the workpiece can be rapidly cooled. Compared with the prior art, the hot-pressing precise micro-forming device has the advantages that the effect of direct heating is realized by directly impacting hot air on the copper pressing plate, so that the heating speed is high, the cooling speed of the copper pressing plate is also high, the processing efficiency is improved, the cooling process is removed, the production efficiency is improved, the operation and the steps are also reduced, and the energy-saving effect is also achieved. The application the accurate little forming device of hot pressing, can be fast direct heating/cooling work piece, energy-conserving high-efficient.

Further, the support frame also comprises a bottom plate, the bottom plate is arranged below the supporting column, and the bottom end of the supporting column is fixed with the bottom plate.

Further, the lifting device comprises a lifting driver and a lifting plate;

the lifting driver is vertically arranged, the bottom end of the lifting driver is installed on the bottom plate, and the top end of the lifting driver is connected with the lifting plate;

the lifting plate is movably sleeved on the supporting column in a penetrating manner, a ventilation opening is formed in the middle of the lifting plate, and the copper pressing plate is installed in the middle of the lifting plate;

the end part of the hot air hose is arranged on the ventilation opening; the copper pressing plate is arranged above the ventilation opening.

Further, the lifting device further comprises a connecting frame installed between the lifting driver and the lifting plate.

Further, the lifting device further comprises a pressing plate supporting frame which is installed between the copper pressing plate and the lifting plate.

Furthermore, the lifting device also comprises a linear bearing, and the linear bearing is sleeved and fixed on the lifting plate and sleeved on the supporting column.

Further, the lifting driver is an electric push rod.

Further, a plurality of microstructures are formed on the surface of the copper pressing plate, and a microarray is formed.

Furthermore, the bottom surface of the mold core is a plane, or the bottom surface of the mold core is concave upwards to form an inwards concave curved surface, or the bottom surface of the mold core is an outwards convex curved surface;

the surface of the mold core is smooth or is distributed with a micropore array structure.

Further, the mold comprises a pressure sensor, and the pressure sensor is arranged between the top plate and the mold core.

For a better understanding and practice, the present application is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of an exemplary hot-press precision micro-molding apparatus of the present application;

FIG. 2 is a perspective view of an exemplary hot-press precision micro-molding apparatus of the present application;

FIG. 3 is a perspective view from another perspective of an exemplary hot-press precision micro-molding apparatus of the present application;

FIG. 4 is a perspective view of an exemplary platen support frame and copper platen assembly of the present application;

FIG. 5 is a perspective view of an exemplary platen support frame and workpiece assembly according to the present application;

FIG. 6 is a perspective view of an exemplary core and pressure sensor assembly of the present application;

FIG. 7 is a perspective view of an exemplary copper platen of the present application;

FIG. 8 is a front view of three exemplary mold cores of the present application;

fig. 9 is a flowchart illustrating an exemplary operation of the present application.

Detailed Description

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.

FIG. 1 is a front view of an exemplary hot-press precision micro-molding apparatus of the present application; FIG. 2 is a perspective view of an exemplary hot-press precision micro-molding apparatus of the present application; FIG. 3 is a perspective view from another perspective of an exemplary hot-press precision micro-molding apparatus of the present application; FIG. 4 is a perspective view of an exemplary platen support frame and copper platen assembly of the present application; FIG. 5 is a perspective view of an exemplary platen support frame and workpiece assembly according to the present application; FIG. 6 is a perspective view of an exemplary core and pressure sensor assembly of the present application; FIG. 7 is a perspective view of an exemplary copper platen of the present application; FIG. 8 is a front view of three exemplary mold cores of the present application; fig. 9 is a flowchart illustrating an exemplary operation of the present application.

Referring to fig. 1 to 8, an exemplary hot-pressing precision micro-molding apparatus of the present application includes a hot air supply device 20, a hot air hose 21, a lifting device, a mold core 50, a copper pressing plate 41, and a support;

the support comprises support columns 12 and a top plate 11, the top plate 11 is transversely arranged, and the support columns 12 are vertically arranged and fixedly mounted on the bottom surface of the top plate 11 respectively;

the lifting device is movably mounted on the supporting column 12 in a limiting manner and can be lifted relative to the supporting column 12;

the mold core 50 is installed on the bottom surface of the top plate 11;

the copper pressing plate 41 is arranged on the top surface of the lifting device and is arranged below the mold core 50;

one end of the hot air hose 21 is connected to the middle part of the lifting device, the pipe orifice of the hot air hose is arranged below the copper pressing plate 41, and the other end of the hot air hose 21 is connected with the hot air supply device 20;

the hot air supply device 20 is placed at one side of the bracket;

the upper surface of the copper pressing plate 41 is formed with micro holes.

According to the hot-pressing precision micro-forming device, the hot air supply device 20 is arranged, and the middle part of the lifting device is connected with the hot air supply device 20 through the hot air hose 21, so that hot air is directly blown out from the middle part of the lifting device and is impacted and heated on the copper pressing plate 41; the workpiece is placed on the copper pressing plate 41, and driven by the lifting device, the workpiece rises and is extruded on the surface of the mold core 50, so that under the double extrusion of the copper pressing plate 41 and the mold core 50, the workpiece is subjected to micro extrusion molding by utilizing the micropores on the surface of the copper pressing plate 41, and then a micro-convex structure is processed on the lower surface of the workpiece. In the process of extrusion molding of the workpiece, the workpiece is directly heated by directly impacting hot air on the copper pressing plate 41; and after the workpiece is heated, the hot air supply is closed or the air flow temperature is reduced, so that the workpiece can be rapidly cooled. Compared with the prior art, the hot-pressing precise micro-forming device provided by the application directly impacts the copper pressing plate 41 through hot air, so that the effect of direct heating is realized, and the heating speed is high; the copper pressing plate 41 has a fast cooling speed, and the on-line fast cooling can be realized by closing hot air or reducing the temperature of air flow. Compared with the hot pressing process in the prior art, the hot pressing process saves the cooling time for changing the mold core and the workpiece station, improves the production efficiency, reduces the operation and steps and also achieves the effect of energy conservation.

In some preferred embodiments, the support further comprises a base plate 14, the base plate 14 is disposed below the support column 12, and the bottom end of the support column 12 is fixed to the base plate 14. A base plate 14 is provided to facilitate mounting of the support post 12 and the lifting device, the bottom of which is mounted on the base plate 14.

In some preferred embodiments, the lifting device comprises a lifting drive 30 and a lifting plate 13;

the lifting driver 30 is vertically arranged, the bottom end of the lifting driver is installed on the bottom plate 14, and the top end of the lifting driver is connected with the lifting plate 13;

the lifting plate 13 is movably sleeved on the supporting column 12, a ventilation opening is formed in the middle of the lifting plate 13, and the copper pressing plate 41 is installed in the middle of the lifting plate 13;

the end part of the hot air hose is arranged on the ventilation opening; the copper platen 41 is placed above the vent.

The lifting driver 30 pushes the lifting plate 13 to lift, the copper pressing plate 41 is placed on the lifting plate 13, the workpiece is placed on the copper pressing plate 41, under the pushing of the lifting driver 30, the copper pressing plate 41 drives the workpiece to lift, the workpiece is pushed upwards through the copper pressing plate 41, the upper surface of the workpiece is extruded on the surface of the mold core 50, the upper surface of the workpiece is extruded with the mold core 50, and the lower surface of the workpiece is extruded with the copper pressing plate 41 in an extrusion forming mode. After the machining is completed, the workpiece is lowered by the driving of the elevating driver 30.

In some preferred embodiments, the lifting device further comprises a connecting frame 31, and the connecting frame 31 is installed between the lifting driver 30 and the lifting plate 13. By providing the connection bracket 31, the connection between the lifting driver 30 and the lifting plate 13 is made more stable. Furthermore, the cross section of the connecting frame 31 is in a U shape or an inverted II shape, the lifting driver 30 is installed on the bottom surface of the connecting frame 31, and two ends of the top surface of the connecting frame 31 are respectively installed on the lifting plate 13, so that the acting force output by the lifting driver 30 is uniformly distributed on two sides of the lifting plate 13, and the stress on the lifting plate 13 is more uniform.

In some preferred embodiments, the lifting device further comprises a press plate support frame 42, and the press plate support frame 42 is installed between the copper press plate 41 and the lifting plate 13. By providing the pressing plate supporting frame 42, the connection stability of the copper pressing plate 41 and the lifting plate 13 is improved. Further, a copper platen 41 is placed on a platen support frame 42 in a sandwiched manner. Further, an air leakage gap is formed between the pressing plate supporting frame 42 and the lifting plate 13, and hot air can be discharged from the air leakage gap.

In some preferred embodiments, the lifting device further includes a linear bearing 15, and the linear bearing 15 is fixed on the lifting plate 13 in a penetrating manner and sleeved on the supporting column 12. The linear bearing 15 is provided to increase the lifting stability of the lifting plate 13.

In some preferred embodiments, the lift drive 30 is a motorized push rod.

In some preferred embodiments, the surface of the copper platen 41 is formed with a plurality of microstructures and forms a microarray. The formed microarray is used for forming a microstructure on the surface of the workpiece. It is understood that the plurality of micro wells on the copper platen 41 are arranged in an array to form a micro array.

In some preferred embodiments, the bottom surface of the mold core 50 is curved and convex, and the surface is smooth. The macroscopic shape of the processed workpiece is a curved surface, and the microstructure array is distributed on the outer curved surface.

In other preferred embodiments, the bottom surface of the mold core 50 is concave inward to form an arc-shaped cavity, and the surface is smooth. The macroscopic shape of the processed workpiece is a curved surface, and the microstructure array is distributed on the inner curved surface.

In other preferred embodiments, the bottom surface of the mold core 50 is concave inward to form an arc-shaped cavity, and the microstructure array is distributed on the surface. The macroscopic shape of the processed workpiece is a curved surface, and the microstructure arrays are distributed on the curved surfaces of the inner side and the outer side.

In other preferred embodiments, the bottom surface of the mold core 50 is planar and the surface is smooth. The macroscopic shape of the processed workpiece is rectangular, and the microstructure array is distributed on the lower surface of the plane.

In some preferred embodiments, the bottom surface of the mold core is flat, or in some preferred embodiments, the bottom surface of the mold core is concave upwards to form a concave curved surface; alternatively, in some preferred embodiments, the bottom surface of the mold core is a convex curved surface.

In some preferred embodiments, the surface of the mold core is smooth, and when the surface of the mold core is smooth, the inner side surface or the upper surface of the processed workpiece is smooth, and the outer side surface or the lower surface of the workpiece is a surface with a micro-convex array.

In other preferred embodiments, the surface of the mold core is distributed with a micro-hole array structure, especially the bottom surface of the mold core is distributed with a micro-hole array structure, at this time, the surface of the mold core is a micro-hole array surface, and the inner and outer side surfaces of the processed workpiece are both surfaces with micro-convex arrays, or the upper and lower surfaces of the workpiece are both surfaces with micro-convex arrays.

Exemplary combinations of structures. Firstly, the bottom surface of the mold core is a plane and is smooth; secondly, the bottom surface of the mold core is an inwards concave curved surface and is smooth; thirdly, the bottom surface of the mold core protrudes outwards and is smooth; fourthly, the bottom surface of the mold core is a plane and is distributed with a micropore array; fifthly, the bottom surface of the mold core is an inwards concave curved surface and is distributed with a micropore array; and sixthly, the bottom surface of the mold core is an outward convex curved surface and is distributed with a micropore array. Different combinations result in different shapes of the machined workpiece and different surface smoothness.

In some preferred embodiments, a pressure sensor 60 is further included, the pressure sensor 60 being disposed between the top plate 11 and the mold core 50. A pressure sensor 60 is provided to determine the pressure value and to control the squeezing.

In some preferred embodiments, a hose connector (not shown) is further included, which is installed on the ventilation opening in the middle of the lifting plate 13, and is connected to the hot air hose 21. The hose joint is a hard joint, and the hot air hose 21 is a flexible pipe.

The application discloses theory of operation of the accurate micro-forming device of hot pressing:

please refer to fig. 1-8 in conjunction with fig. 9. In fig. 9, a curved mold core 91, a workpiece 92, a copper platen 93 with a microarray. Step a is a preparation stage, step b is hot air flow impact softening of the workpiece, step c is cold air flow cooling of the workpiece, step d is demolding, and step e is a workpiece forming state. The lenses forming the array of thermo-compression molded fly eye microlenses are finally formed.

The workpiece is placed on the copper pressing plate 41, the lifting plate 13 drives the copper pressing plate 41 and the hose connector to ascend under the driving of the electric push rod, and when the workpiece is extruded on the mold core 50 and reads a preset pressure value through the pressure sensor 60, the ascending is stopped. And then, hot air is continuously supplied to the copper pressing plate 41 through the hot air supply device 20, so that the copper pressing plate 41 is heated, the microarray on the copper pressing plate 41 is extruded with the workpiece, and the bottom surface of the workpiece forms a projection array, so that the target product is obtained.

The micro-lens structure is formed by hot-pressing micro-molding plastic, low-melting glass and the like by continuously adjusting and controlling the temperature of air flow within the range of 25-600 ℃. For example for the processing of optical microlenses.

The hot-pressing precision micro-forming device utilizes the high-speed airflow thermal shock effect to heat the copper pressing plate 41 and press the workpiece to form the workpiece. This application realizes the even shaping of work piece, and does not produce by a wide margin and warp, is favorable to processing accurate work piece, is a simple and practical, low cost's hot press unit.

The workpiece is heated based on the high-speed airflow thermal shock effect, the hot pressing pressure in the forming process is reduced, the gas temperature is flexibly controlled to heat/cool the workpiece on line, the forming efficiency is improved, and the energy consumption in the hot pressing forming process is reduced.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. The utility model provides a precise little forming device of hot pressing which characterized in that: comprises a hot air supply device, a hot air hose, a lifting device, a mold core, a copper pressing plate and a bracket;

the support comprises support columns and a top plate, the top plate is transversely arranged, and the support columns are vertically arranged and fixedly installed on the bottom surface of the top plate respectively;

the lifting device is movably mounted on the supporting column in a limiting manner and can lift relative to the supporting column;

the mold core is arranged on the bottom surface of the top plate;

the copper pressing plate is arranged on the top surface of the lifting device and is arranged below the mold core;

one end of the hot air hose is connected to the middle part of the lifting device, the pipe orifice of the hot air hose is arranged below the copper pressing plate, and the other end of the hot air hose is connected with the hot air supply device;

the hot air supply device is arranged on one side of the bracket;

micropores are formed on the upper surface of the copper pressing plate.

2. The hot-pressing precision micro-molding device according to claim 1, characterized in that: the support also comprises a bottom plate, the bottom plate is arranged below the supporting column, and the bottom end of the supporting column is fixed with the bottom plate.

3. The hot-pressing precision micro-molding device according to claim 2, characterized in that: the lifting device comprises a lifting driver and a lifting plate;

the lifting driver is vertically arranged, the bottom end of the lifting driver is installed on the bottom plate, and the top end of the lifting driver is connected with the lifting plate;

the lifting plate is movably sleeved on the supporting column in a penetrating manner, a ventilation opening is formed in the middle of the lifting plate, and the copper pressing plate is installed in the middle of the lifting plate;

the end part of the hot air hose is arranged on the ventilation opening; the copper pressing plate is arranged above the ventilation opening.

4. The hot-pressing precision micro-molding device according to claim 3, characterized in that: the lifting device further comprises a connecting frame mounted between the lifting drive and the lifting plate.

5. The hot-pressing precision micro-molding device according to claim 4, characterized in that: the lifting device further comprises a pressing plate supporting frame, and the pressing plate supporting frame is installed between the copper pressing plate and the lifting plate.

6. The hot-pressing precision micro-molding device according to claim 5, characterized in that: the lifting device also comprises a linear bearing, and the linear bearing is sleeved and fixed on the lifting plate and sleeved on the supporting column.

7. The hot-pressing precision micro-molding device according to any one of claims 3 to 6, wherein: the lifting driver is an electric push rod.

8. The hot-pressing precision micro-molding device according to any one of claims 1 to 6, wherein: the surface of the copper pressing plate is provided with a plurality of microstructures, and a microarray is formed.

9. The hot-pressing precision micro-molding device according to claim 8, characterized in that: the bottom surface of the mold core is a plane, or the bottom surface of the mold core is concave upwards to form an inwards concave curved surface, or the bottom surface of the mold core is an outwards convex curved surface;

the surface of the mold core is smooth or is distributed with a micropore array structure.

10. The hot-pressing precision micro-molding device according to any one of claims 1 to 6, wherein: the mould also comprises a pressure sensor which is arranged between the top plate and the mould core.

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