CN221161249U - Mould - Google Patents

Abstract

The die comprises a main body and a driving assembly, wherein the main body is provided with a containing cavity, the main body comprises a deforming plate, the deforming plate comprises a first surface and a second surface which are opposite, and the second surface is an inner wall surface of the containing cavity; the driving assembly comprises a driving base and a plurality of drivers, the driving base is connected with the main body, the drivers are arranged on the driving base, and the drivers are accommodated in the accommodating cavity; the drivers are used for independently extending to abut against the second surface so as to drive the first surface to deform; the first surface is used for manufacturing an optical curved surface of a workpiece to be processed. Through setting up main part and drive assembly, the main part includes the deformation board, and drive assembly includes a plurality of drivers, and a plurality of drivers are used for independent extension in order to butt deformation board to carry out the calibration of face shape precision, can reduce mould face shape calibration step, reduce mould processing manufacturing cost.

Description

Mould

Technical Field

The utility model relates to the technical field of mold equipment, in particular to a mold.

Background

The mature processing technology of the complex curved surface and microstructure optical element is to combine the ultra-precise machining technology with the replication technology, firstly perform ultra-precise machining (cutting, grinding and polishing) on the surface of the die structure, and then perform replication processing through precise injection molding/die pressing to realize efficient, ultra-precise, batch and environment-friendly production of the complex curved surface optical resin/glass element.

However, in the precision molding and injection molding processes, the designed lens shape profile cannot be directly used for processing the precision mold shape profile due to factors such as temperature and pressure, but the mold needs to be corrected by the lens shape obtained through multiple molding experiments until the molded lens pressed out by the mold meets the design requirements.

Disclosure of utility model

The utility model aims to provide a die, which can reduce the times of compression molding and reduce the processing and manufacturing cost of the die.

In order to achieve the purpose of the utility model, the utility model provides the following technical scheme:

In a first aspect, the present utility model provides a mold comprising a body and a drive assembly, the body having a receiving cavity, the body comprising a deformable plate, the deformable plate comprising first and second opposed faces, the second face being an inner wall surface of the receiving cavity; the driving assembly comprises a driving base and a plurality of drivers, the driving base is connected with the main body, the drivers are arranged on the driving base, and the drivers are accommodated in the accommodating cavity; the drivers are used for independently extending to abut against the second surface so as to drive the first surface to deform; the first surface is used for manufacturing an optical curved surface of a workpiece to be machined.

In one embodiment, the first face is parallel to the second face.

In one embodiment, the driver is columnar, extends along the driving base towards the deforming plate, and is provided with an arc surface on the end surface far away from the driving base, and the arc surface is used for being abutted with the second surface.

In one embodiment, the end surfaces of the plurality of drivers away from the driving base form a third surface together, and the third surface is parallel to or coincides with the second surface in an initial state in which the plurality of drivers are not extended.

In one embodiment, the plurality of drivers are arranged in an array, and the distance between two adjacent drivers in the same direction is the same.

In one embodiment, in the orthographic projection of the extending direction of the drivers, a plurality of drivers are located in the second face, and the drivers occupy the second face.

In one embodiment, the orthographic projection of the first surface is any one of regular polygon, circle, rectangle, and ellipse.

In one embodiment, the driving assembly further comprises a control member, the control member is accommodated in the driving base, the driver is of a piezoelectric structure, and the plurality of drivers are independently controlled by the control member.

In one embodiment, the mold further comprises a base, the driving base is disposed on the base, and the base is detachably connected with the main body.

In one embodiment, the main body comprises a mounting surface far away from the deformation plate, the opening of the accommodating cavity is positioned on the mounting surface, and the mounting surface is fixedly connected with the seat body; the seat body is provided with a containing groove, and the driving base is contained in the containing groove.

Through setting up main part and drive assembly, the main part includes the deformation board, and drive assembly includes a plurality of drivers, and a plurality of drivers are used for independent extension in order to butt deformation board to carry out the calibration of shape of face precision, can reduce compression molding number of times, reduce mould processing manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a mold of an embodiment;

FIG. 2 is a cross-sectional view of a mold of an embodiment;

Fig. 3 is an exploded view of a mold of an embodiment.

Reference numerals illustrate:

100-die;

10-main body, 11-accommodating cavity, 12-deforming plate, 121-first face, 122-second face, 13-side plate, 14-mounting face, 141-first mounting hole;

20-drive assembly, 21-drive base, 211-second mounting hole, 22-driver, 221-first end;

30-a base body, 31-a containing groove, 311-a second fixing hole, 32-a fixing surface and 321-a first fixing hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

The complex curved surface and microstructure optical element is beneficial to improving imaging quality, simplifying optical system structure, reducing the number of optical elements and the overall size of the system, and can obtain a plurality of special optical performances, thereby providing great design freedom for optical designers. Accordingly, in the fields of laser radar, VR/AR imaging, illumination, vehicle-mounted HUD, medical treatment, and the like, the market for photoelectric products based on complex curved optical elements is increasing.

The mature processing technology of the complex curved surface and microstructure optical element is to combine the ultra-precise machining technology with the replication technology, firstly perform ultra-precise machining (cutting, grinding and polishing) on the surface of the die structure, and then perform replication processing through precise injection molding/die pressing to realize efficient, ultra-precise, batch and environment-friendly production of the complex curved surface optical resin/glass element.

The precision optical injection molding/mould pressing manufacturing refers to that a certain pressure is applied at a high temperature to copy the structural shape of the surface of a mould to the surface of resin/glass softened by heating, and the surface of optical resin or glass material is processed into a complex curved surface or microstructure through annealing, cooling and solidification. Compared with the traditional processing method, the method is suitable for mass production and manufacturing, reduces the production cost, and is considered as one of the most effective methods for manufacturing the complex optical element.

Because of the temperature gradient and stress distribution in the lens in the precision molding and injection molding process, the stress relaxation and structure relaxation of the resin and the glass in the annealing and cooling processes, the thermal expansion and contraction of the lens preform, the setting of the molding process parameters and the like, the designed lens shape profile cannot be directly used for processing the precision mold shape profile.

The traditional precision mould manufacturing method is to firstly process a mould according to the shape of a formed lens, and then correct the mould by a trial and error method, namely the lens shape obtained by multiple compression moulding experiments, until the formed lens pressed out by the mould meets the design requirement. Although the traditional trial-and-error method can improve the surface quality of the formed lens and reduce the profile offset, repeated die repairing processing is time-consuming and low in processing efficiency, so that the production cost of the precise die is extremely high.

With the increasing maturity of the simulation technology, the whole process of deforming the glass preform into a formed lens in the molding process, the internal stress change of the lens, the thermal expansion and contraction of the lens and the mold and the contour change of the lens in the cooling and annealing stages can be observed and predicted by means of simulation software; the optimization of molding process parameters is realized, the product development period is shortened, the production cost is reduced, the quality of molded lenses is improved, and the like. However, after the simulation analysis is performed to the surface profile of the die, repeated iterative compensation and error correction are still required in the die manufacturing stage, so that the high-quality precision die required by die pressing can be obtained.

In order to further shorten the production and manufacturing period of the mold, the embodiment of the utility model provides a mold device for precisely injection molding/compression molding of complex optical curved surface elements, which is capable of controlling deformation. The mold is characterized in that firstly, based on optimized technological parameters, the influence of injection molding/compression molding temperature and pressure on the surface shape precision of the mold in the injection molding/compression molding process is predicted by adopting simulation analysis, the compensation analysis of the contour offset is carried out, then the contour offset is compensated and corrected by utilizing the device, and the high-precision optical mold can be obtained without the complex iterative processing process of the traditional mold.

Referring to fig. 1, 2 and 3, an embodiment of the present utility model provides a mold 100, including a main body 10 and a driving assembly 20, wherein the main body 10 has a receiving cavity 11, the main body 10 includes a deforming plate 12, the deforming plate 12 includes a first surface 121 and a second surface 122 opposite to each other, and the second surface 122 is an inner wall surface of the receiving cavity 11; the driving unit 20 includes a driving base 21 and a plurality of drivers 22, the driving base 21 is connected to the main body 10, the plurality of drivers 22 are provided on the driving base 21, and the plurality of drivers 22 are accommodated in the accommodating chamber 11.

Alternatively, the shape of the main body 10 may be a prism, a cylinder, or the like, and is not particularly limited; the deforming plate 12 may be a straight plate or a curved plate, and is not particularly limited.

Optionally, the main body 10 further includes a side plate 13, where the side plate 13 is connected to the deforming plate 12 and encloses the accommodating cavity 11. The main body 10 may be an integral structure, that is, the deformed plate 12 and the side plate 13 are manufactured by an integral forming process, and the integral forming process may specifically be stamping, casting, etc., without limitation. The main body 10 can also be of a split structure, and the side plates 13 and the deformation plate 12 can be connected and fixed in a welding, bonding, clamping, screwing and other modes. The wall thickness of the body 10 may be substantially uniform throughout, i.e., the thickness of the side plates 13 may be substantially uniform, as may the thickness of the deformed plate 12 and side plates 13.

Alternatively, the main body 10 and the driving base 21 may be directly connected, or may be indirectly connected, without limitation. The connection mode between the main body 10 and the driving base 21 may be, specifically, welding, bonding, clamping, screwing, etc., without limitation.

Optionally, the connection between the driver 22 and the driving base 21 is similar to the connection between the main body 10 and the driving base 21, which is not described in detail.

The plurality of drivers 22 are used for independently extending to abut against the second surface 122 so as to drive the first surface 121 to deform; the first surface 121 is used for making an optical curved surface of a workpiece. The influence of injection/compression temperature and pressure on the surface shape precision of the surface of the mold 100 in the injection/compression molding process is predicted by adopting simulation analysis, and after the compensation analysis of the profile offset is performed, a plurality of drivers 22 are abutted against the second surface 122 to perform compensation correction on the profile offset. Since the first surface 121 and the second surface 122 are opposite surfaces of the deformable plate 12, the actuator 22 contacts the second surface 122 to deform the first surface 121 at the corresponding position to deform the second surface, thereby achieving the correction effect.

In the mold 100 according to the embodiment of the present utility model, by providing the main body 10 and the driving assembly 20, the main body 10 includes the deforming plate 12, the driving assembly 20 includes the plurality of drivers 22, and the plurality of drivers 22 are used for independently extending to abut against the deforming plate 12, so as to calibrate the surface shape accuracy, reduce the number of compression molding times, and reduce the manufacturing cost of the mold 100.

Alternatively, as shown in fig. 2, first face 121 is parallel to second face 122.

Alternatively, first surface 121 is parallel to second surface 122, i.e., first surface 121 is equidistant from the corresponding location of second surface 122, and the thickness of deformable plate 12 is substantially uniform.

By arranging the parallel first surface 121 and second surface 122, when the second surface 122 is deformed by the abutting of the driver 22, the positions corresponding to the first surface 121 and the second surface 122 are deformed in a preset manner, so as to realize precise adjustment of the micrometer and submicron surface errors of the surface shape of the die 100.

Alternatively, as shown in fig. 2, the driver 22 is columnar and extends along the driving base 21 toward the deforming plate 12, and an end surface of the driver 22 away from the driving base 21 is an arc surface, where the arc surface is used for abutting against the second surface 122.

Alternatively, the shape of the driver 22 may be a prism, a cylinder, or the like, and is not particularly limited.

Optionally, the driver 22 includes a first end 221 remote from the driving base 21, where the first end 221 is an arc surface, and the first end 221 is configured to abut against the second surface 122. Because the first end 221 is a cambered surface, and is in point contact with the second surface 122, the stress is more concentrated, the precise adjustment of the surface shape error can be realized, and further the control of the nano-scale surface shape precision of the large-scale mold 100 is realized, so that the precise compensation of the profile offset of the surface of the mold 100 is realized.

By setting the first end 221 of the driver 22 abutting against the second surface 122 to be an arc surface, the pressure applied by the driver 22 to the second surface 122 is more accurate, accurate control is realized, the arc surface does not scratch the surface of the second surface 122, and the processing and manufacturing cost of the die 100 is reduced.

Optionally, the end surfaces of the plurality of drivers 22 away from the driving base 21 together form a third surface (not shown in the figure), and the third surface is parallel or coincident with the second surface 122 in the initial state in which the plurality of drivers 22 are not extended.

Optionally, the first ends 221 of the plurality of drivers 22 collectively form a third face that is similar in shape to the second face 122.

Alternatively, in the initial state, the first ends 221 of the plurality of drivers 22 are all just in contact with the second face 122, and the third face coincides with the second face 122; or the first ends 221 of the plurality of drivers 22 extend the same distance from the end surface to the second surface 122, where the third surface is parallel to the second surface 122, the specific distance is not limited.

By arranging the end surfaces of the plurality of drivers 22 far away from the driving base 21 to form the third surface together, when the plurality of drivers 22 are in an unextended initial state, the third surface is parallel to or coincident with the second surface 122, so that the arrangement of the plurality of drivers 22 in the initial state is similar to the surface shape of the deformation plate 12, and when the shape error of the surface is precisely regulated, the moving distance of the drivers 22 is shorter, and the processing is convenient.

Alternatively, as shown in fig. 3, the plurality of drivers 22 are arranged in an array, and the adjacent two drivers 22 in the same direction have the same distance.

Alternatively, the plurality of drivers 22 may be rectangular array arrangement, regular polygon array arrangement, circular array arrangement, or the like, without being particularly limited.

Optionally, when the plurality of drivers 22 are arranged in a rectangular array, the pitches of two drivers 22 adjacent in the row direction are the same, the pitches of two drivers 22 adjacent in the column direction are the same, and the pitches in the row direction and the column direction may be the same or different, which is not particularly limited; similarly, when the plurality of drivers 22 are arranged in a circular array, the distances between two radially adjacent drivers 22 are the same, the distances between two circumferentially adjacent drivers 22 are the same, the radial distances and the circumferential distances can be the same or different, and the other array arrangement modes are similar to those described above, and the description thereof is omitted.

As illustrated in fig. 3, the plurality of drivers 22 are arranged in a rectangular array, the pitch of two drivers 22 adjacent in the row direction is the same, the pitch of two drivers 22 adjacent in the column direction is the same, and the pitch in the row direction and the pitch in the column direction are the same.

By arranging a plurality of drivers 22 arranged in an array, the drivers 22 are regularly arranged, thereby being convenient for independently controlling the drivers 22 to realize the precise adjustment of local surface shape errors,

Alternatively, in the orthographic projection of the extending direction of the drivers 22, the plurality of drivers 22 are located in the second face 122, and the plurality of drivers 22 occupy the second face 122.

Alternatively, the orthographic projection of the second surface 122 in the extending direction of the driver 22 may be regular polygon, circle, rectangle, etc., which is not particularly limited.

Alternatively, the front projection of the driver 22 in the self-extending direction may be regular polygon, circle, rectangle, etc., and the front projection of the driver 22 may be the same as or different from the front projection of the second surface 122, which is not limited in particular.

For example, as shown in fig. 2 and 3, the mold 100 has a rectangular orthographic projection of the second surface 122 in the extending direction of the drivers 22, and the orthographic projections of the drivers 22 in the extending direction thereof are circular and are all located in the rectangular projection of the second surface 122.

Optionally, the plurality of drivers 22 are arranged in an array corresponding to the orthographic shape of the second face 122, and the edges of the array coincide with the orthographic edges of the second face 122. For example, the front projection of the second surface 122 is rectangular, and the plurality of drivers 22 are arranged in a rectangular array; or the front projection of the second surface 122 is circular, and the plurality of drivers 22 are arranged in a circular array, which is not limited in particular.

In the orthographic projection of the extending direction of the drivers 22, the drivers 22 are all located in the second surface 122, and the drivers 22 occupy the second surface 122, so that the drivers 22 can accurately adjust the surface shape of the whole surface of the second surface 122, and no adjusting dead angle exists.

Optionally, the orthographic projection of the first surface 121 is any one of regular polygon, circle, rectangle, and ellipse.

Alternatively, the orthographic projection of the first surface 121 in the extending direction of the driver 22 corresponds to the orthographic projection of the second surface 122, and may be, without limitation, a regular polygon, a circle, a rectangle, an ellipse, or the like.

By providing the surface shape of the first surface 121, different surface shapes can be used for processing optical curved surfaces with different shapes, and the application range is wider.

Optionally, the driving assembly 20 further includes a control member (not shown in the drawing), the control member is accommodated in the driving base 21, the drivers 22 are of a piezoelectric structure, and the plurality of drivers 22 are independently controlled by the control member.

Alternatively, the control member may be a circuit board, and the plurality of drivers 22 are connected to the circuit board, and each driver 22 is independently controllable by the circuit board; the control member may be plural, and plural control members are respectively connected to plural actuators 22 for independently controlling the extension of the individual actuators 22, and is not particularly limited.

Alternatively, the actuator 22 is a piezoceramic actuator 22. The piezoelectric ceramic driver 22 has the advantages of small volume, high precision, quick response, large driving force, convenient integration and the like. In order to increase the stroke of the piezoceramic actuator 22, a stacked piezoelectric stack, i.e., a piezoelectric stack structure, is employed.

Optionally, the control member further includes a control wire (not shown), through which the control member is connected to the outside.

By arranging the control piece, the control piece is used for controlling the plurality of drivers 22 to independently work, so that the precise adjustment of the surface shape of the die 100 can be realized, and the control of the nano-scale surface shape precision of the large-scale die 100 can be realized.

Alternatively, as shown in fig. 2 and 3, the mold 100 further includes a base 30, the driving base 21 is disposed on the base 30, and the base 30 is detachably connected to the main body 10.

Optionally, the connection manner between the driving base 21 and the base 30, and between the base 30 and the main body 10 may be specifically, but not limited to, welding, bonding, clamping, screwing, etc.

Optionally, the front projection of the base 30 in the extending direction of the driver 22 is the same as the front projection of the first surface 121 in the extending direction of the driver 22. For example, if the front projection of the first surface 121 is rectangular, the front projection of the base 30 is rectangular; the front projection of the first surface 121 is circular, and the front projection of the base 30 is circular.

By arranging the seat body 30, the driving base 21 is arranged on the seat body 30, the seat body 30 is detachably connected with the main body 10, the seat body 30 can fix the position of the driving base 21, and then the position of the driver 22 is fixed, so that the contact between the driving base and the deformation plate 12 is more stable.

Alternatively, as shown in fig. 2 and 3, the main body 10 includes a mounting surface 14 remote from the deforming plate 12, the opening of the accommodating cavity 11 is located on the mounting surface 14, and the mounting surface 14 is fixedly connected with the seat body 30; the base 30 is provided with a receiving groove 31, and the driving base 21 is received in the receiving groove 31.

Alternatively, the housing 30 includes a fixing surface 32 facing the mounting surface 14, and the opening of the receiving groove 31 is located on the fixing surface 32, and the mounting surface 14 is used to contact the mounting surface 14 when the body 10 is connected to the housing 30, and the housing 30 is connected to the body 10 by a first fastener (not shown).

Optionally, the mounting surface 14 is provided with a first mounting hole 141, and the fixing surface 32 is provided with a first fixing hole 321, where the first mounting hole 141 and the first fixing hole 321 are connected with a first fastener in a matching manner.

Alternatively, the number of the first mounting holes 141, the first fixing holes 321, and the first fasteners may be 1, 2, 3, etc., and is not particularly limited.

Optionally, a second mounting hole 211 is formed on a surface of the driving base 21 facing the base 30, a second fixing hole 311 is formed on a bottom surface of the accommodating groove 31 opposite to the opening, and a second fastener (not shown in the figure) is connected with the second mounting hole 211 and the second fixing hole 311 in a matching manner.

Optionally, the driving assembly 20 is accommodated in the accommodating cavity 11 and the accommodating groove 31, and the opening of the accommodating cavity 11 is slightly larger than the opening of the accommodating groove 31, so that the driving assembly 20 and the main body 10 are convenient to install.

Optionally, a wiring hole (not shown in the figure) is further formed on the base, for accommodating a control wire of the control element.

By arranging the mounting surface 14 and the accommodating groove 31, the main body 10 is connected with the seat body 30 through the mounting surface 14, so that the installation is convenient; the driving base 21 is accommodated in the accommodating groove 31, so that the position of the driving base 21 can be fixed, and the driving base 21 is prevented from moving.

The specific working steps of the mold 100 in the embodiment of the present utility model are as follows:

Firstly, the influence of a single driver 22 on the surface shape precision of the surface shape of the die 100 is analyzed through simulation and measurement, during the simulation, other drivers 22 are not moved, 1 mu m displacement is applied to the single driver 22, the influence of the displacement on the surface shape of the deforming plate 12 is calculated, namely, the influence function of the driver 22 on the surface shape is calculated, and meanwhile, the influence function of the driving displacement in the whole surface shape on the surface shape is calculated by calculating other drivers 22 at different positions.

And then, the influence of the driving displacement on the surface shape of the deforming plate 12 is measured by using an optical measuring device, the result is compared with the simulation result, and the surface shape influence function is corrected according to the measurement result. The additive effect of the influence of the different position drivers 22 on the shape of the deformed plate 12 is calculated from the modified function. In the actual surface shape adjusting process, the driving displacement of the driver 22 at different positions of the driving assembly 20 is independently regulated and controlled, so that the precise adjustment of the micrometer and submicron surface shape errors at different positions of the deformed plate 12 is realized, the nano-scale surface shape precision control of the large-scale mold 100 is realized, and the precise compensation of the profile offset of the surface of the mold 100 is realized.

The mold 100 utilizes a driving deformation device to realize high-precision regulation and control of the surface shape of the mold 100. Thereby replacing the traditional processing to compensate the profile offset of the die 100, saving the processing and manufacturing cost of the die 100 and enabling the device to be more automatic.

In the description of the embodiments of the present utility model, it should be noted that, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to the orientation or positional relationship described based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The above disclosure is only a preferred embodiment of the present utility model, and it should be understood that the scope of the utility model is not limited thereto, but all or part of the procedures for implementing the above embodiments can be modified by one skilled in the art according to the scope of the appended claims.

Claims (10)

1. A mold, comprising:

the main body is provided with a containing cavity and comprises a deformation plate, wherein the deformation plate comprises a first surface and a second surface which are opposite, and the second surface is one inner wall surface of the containing cavity;

The driving assembly comprises a driving base and a plurality of drivers, the driving base is connected with the main body, the drivers are arranged on the driving base, and the drivers are accommodated in the accommodating cavity;

The drivers are used for independently extending to abut against the second surface so as to drive the first surface to deform; the first surface is used for manufacturing an optical curved surface of a workpiece to be machined.

2. The mold of claim 1, wherein the first face is parallel to the second face.

3. A mould according to claim 1 or 2, wherein the driver is cylindrical and extends in the direction of the deformation plate along the drive base, the end face of the driver remote from the drive base being a cambered surface for abutment with the second face.

4. A mould according to claim 3, wherein the end faces of the plurality of actuators remote from the drive base together form a third face, the third face being parallel or coincident with the second face in an initial state in which the plurality of actuators are not extended.

5. The mold according to claim 4, wherein the plurality of drivers are arranged in an array, and the adjacent two of the drivers in the array are spaced apart from each other in the same direction.

6. A die as claimed in claim 3, wherein in an orthographic projection of the direction of extension of the drivers, a plurality of the drivers are located in the second face, and a plurality of the drivers occupy the second face.

7. The mold of claim 6, wherein the orthographic projection of the first face is any one of regular polygon, circle, rectangle, oval.

8. The mold of claim 1, wherein the drive assembly further comprises a control member received in the drive base, the actuator being of piezoelectric construction, a plurality of the actuators being independently controlled by the control member.

9. The mold of claim 1, further comprising a housing, wherein the drive base is disposed in the housing, the housing being removably coupled to the body.

10. The mold of claim 9, wherein the body includes a mounting surface remote from the deforming plate, the opening of the receiving cavity being located at the mounting surface, the mounting surface being fixedly connected to the housing; the seat body is provided with a containing groove, and the driving base is contained in the containing groove.