Lens mold forming system and method

Abstract

The embodiment of the application provides a lens mold forming system and method, relates to the technical field of lens processing, and is used for improving the processing efficiency and processing quality of a lens. The lens mold forming system comprises a preparation station, a forming station and a cooling station. The forming station comprises a mold forming device and a first feeding and discharging mechanism. The first feeding and discharging mechanism is used for moving a workpiece to be processed to the mold forming device when the workpiece to be processed in the preparation station is at a first preset temperature value. The mold forming device is used for processing the workpiece to be processed into a lens. The first feeding and discharging mechanism is also used for moving the lens to the cooling station when the lens in the mold forming device is cooled to a second preset temperature value. The first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of a glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of lens processing, and in particular to a lens compression molding system and method. BACKGROUND

[0002] A lens is an important component in an imaging system, for example, in a terminal such as a mobile phone, a camera module composed of multiple lenses can be included. The quality of the lens has a great influence on the imaging quality of the camera module, and in the related art, the processing efficiency and quality of the lens still need to be improved. SUMMARY

[0003] Embodiments of the present application aim to provide a lens compression molding system and method.

[0004] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following solutions:

[0005] In one aspect, a lens compression molding system is provided, comprising a preparation station, a molding station and a cooling station; the molding station comprises a compression molding device and a first feeding and discharging mechanism, the first feeding and discharging mechanism is used to move a workpiece to be processed in the preparation station to the compression molding device when the workpiece to be processed is at a first preset temperature value, the compression molding device is used to process the workpiece to be processed into a lens, and the first feeding and discharging mechanism is also used to move the lens to the cooling station when the lens in the compression molding device cools to a second preset temperature value; wherein the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material.

[0006] When the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass, the state of the workpiece to be processed during the movement to the compression molding device is in a solid state or substantially in a solid state, so that the workpiece to be processed is not easily deformed during the movement, and further, the surface precision of the lens formed after the compression molding device processes the workpiece to be processed (such as forming and shaping to form a lens) is high and is not easily deformed. Here, the temperature at which the lens is taken out (i.e. the second preset temperature value) can not be limited, and compared with the scheme of not controlling the temperature (i.e. the second preset temperature value) at which the workpiece to be processed is put into the compression molding device, the quality of the lens formed finally can still be improved.

[0007] When the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass, the lens is in a solid state or substantially in a solid state during the process of being taken out of the compression molding device, so that the lens is not easily deformed during the movement after being processed and formed, and further, the surface precision of the lens taken out finally is high and is not easily deformed.

[0008] When both the first preset temperature and the second preset temperature are less than or equal to the lower limit of the high-elasticity temperature range of the glass, the advantages of the above two aspects can be combined to obtain a lens with better processing quality, which will not be described herein again.

[0009] In the embodiment, the processing quality of the lens can be effectively improved. In addition, since the time of the workpiece in the mold during the processing of the lens is shorter, the processing efficiency of the lens is also improved, that is, the embodiment of the application can simultaneously consider the quality and processing efficiency of the lens.

[0010] In some embodiments, the mold pressing forming device comprises: a first pressing plate and a second pressing plate arranged oppositely; a movement mechanism connected to the first pressing plate and the second pressing plate, the movement mechanism being used for controlling the distance between the first pressing plate and the second pressing plate; a mold base located between the first pressing plate and the second pressing plate; the mold base comprising a guide accommodating hole; a first mold core located in the guide accommodating hole; a second mold core located between the mold base and the second pressing plate, the second mold core being used for cooperating with the first mold core to extrude the workpiece into the lens in the guide accommodating hole. In the embodiment, the mold base comprising the guide accommodating hole is arranged, and the second mold core can be pressed into the guide accommodating hole by the mutual movement of the first pressing plate and the second pressing plate, so as to cooperate with the first mold core in the guide accommodating hole to extrude the workpiece into the lens. Since the guide accommodating hole is arranged, the lens forming is more stable and reliable, and the lens is not prone to mispositioning, that is, the yield of the lens is improved.

[0011] In some embodiments, the movement mechanism comprises a telescopic rod, one end of the telescopic rod being connected to the first pressing plate, and the other end of the telescopic rod being connected to the second pressing plate. In this way, when the first pressing plate is fixed, the second pressing plate can be pushed to approach or move away from the first pressing plate by the telescopic rod; or when the second pressing plate is fixed, the first pressing plate can be pushed to approach or move away from the second pressing plate by the telescopic rod.

[0012] In some embodiments, the mold pressing forming device further comprises: a first heating plate located between the mold base and the first pressing plate; a mold base fixing member connected to the first heating plate, and the mold base fixing member comprising a clamping jaw abutting against the surface of the edge of the mold base away from the first heating plate. In this way, the movement of the mold base relative to the first heating plate is limited, the reliability of the device is improved, the mold base and the first mold core can be stably heated by the first heating plate, and then the heat can be transferred to the workpiece.

[0013] In some embodiments, the first heating plate comprises a pin hole, which is in communication with the guide accommodating hole; the mold pressing device further comprises a demolding mechanism between the first heating plate and the first pressing plate; the demolding mechanism comprises a pin, which is used to pass through the pin hole to push the first mold core in the guide accommodating hole to move. In this way, after the lens is processed, the pin can be used to lift the first mold core and the lens, which facilitates the observation of the surface of the first mold core and the lens, and facilitates the subsequent removal of the lens from the first mold core. Moreover, in some examples, the second mold core can also be lifted to a certain height at the same time, which facilitates the suction of the second mold core.

[0014] In some embodiments, the first feeding and discharging mechanism comprises a mold core control manipulator, which is used to control the movement of the second mold core; a first feeding manipulator and a first discharging manipulator, the first feeding manipulator is used to move the piece to be processed in the preparation station to the mold pressing device when the piece to be processed in the preparation station is at a first preset temperature value, and the first discharging manipulator is used to move the lens to the cooling station when the lens in the mold pressing device is cooled to the second preset temperature value. For example, after the suction cup of the mold core control manipulator sucks and moves the second mold core to expose the lens, the suction cup of the first discharging manipulator can be used to suck and move the exposed lens to the cooling station, and the suction cup of the first feeding manipulator can be used to suck and move the piece to be processed in the preparation station to the first mold core in the guide accommodating hole. In this embodiment, the three manipulators can work cooperatively, which greatly improves the processing efficiency of the lens. The structure of each manipulator herein can refer to the description of the manipulator in the foregoing, which can be an X-Y-Z three-axis manipulator, or a flexible arm mechanism, etc.

[0015] In some embodiments, the mold pressing device further comprises a second heating plate between the second mold core and the second pressing plate; a fixing frame connected with the second pressing plate; the second heating plate is clamped between the fixing frame and the second pressing plate, and the second heating plate has an accommodating space with the fixing frame, the fixing frame comprises a communication hole communicating with the accommodating space, and the accommodating space and the communication hole are located on the side of the heating plate away from the second pressing plate and sequentially away from the heating plate; the second mold core comprises a head and a rod, the head is limited in the accommodating space, the rod is connected with the head, and the rod passes through the communication hole. In this embodiment, since the fixing frame can fix the second heating plate relative to the second pressing plate, and can limit the head of the second mold core in the accommodating space between the second heating plate and the fixing frame, the second heating plate and the second mold core can be driven to move together during the movement of the second pressing plate, at this time, the mold core control manipulator can be omitted to move the second mold core.

[0016] In some embodiments, the fixing frame further comprises a mounting frame and a connecting frame, the connecting frame connects the mounting frame and the second pressing plate; the mounting frame abuts against the surface of the second pressing plate away from the second heating plate; the accommodating space is located between the mounting frame and the second heating plate, and the through hole is located in the mounting frame. In this example, the fixing frame is divided into two parts, which is convenient for installation, disassembly and maintenance.

[0017] In some embodiments, the connecting frame comprises a connecting block, a first connecting piece and a second connecting piece, the first connecting piece connects the connecting block and the second pressing plate, the second connecting piece connects the connecting block and the opposite surface of the mounting frame in the first direction, the connecting block and the opposite surface of the mounting frame in the first direction have a gap, and the first direction is the stacking direction of the second heating plate and the second pressing plate. In this example, the first connecting piece and the second connecting piece can be used to fix the fixing frame more conveniently. The first connecting piece and the second connecting piece can be bolts. The gap between the connecting block and the opposite surface of the mounting frame in the first direction can play a good fastening role while the bolts are fixed, and the situation that the connecting block and the mounting frame contact after the bolts are tightened and the second heating plate is not clamped can be avoided, thereby improving the reliability.

[0018] In some embodiments, the thermal expansion coefficient of the hole wall of the through hole is greater than the thermal expansion coefficient of the rod part. In this example, the gap between the rod part and the through hole is small or non-existent when the mold pressing equipment is heated before mold pressing, and because the thermal expansion coefficient of the hole wall of the through hole is greater than the thermal expansion coefficient of the rod part, the rod part has a certain degree of automatic correction effect during contact with the workpiece to be processed, that is, the rod part is prevented from being in an inclined pressing process due to the lack of movement allowance between the through hole and the rod part during pressing, thereby improving the processing quality of the lens.

[0019] In some embodiments, the stacking direction of the second heating plate and the second pressing plate is the first direction; the axis of the through hole is parallel to the first direction; and the distance of the accommodating space in the first direction is greater than the distance of the head part in the first direction. In this example, by setting the distance of the accommodating space in the first direction to be greater than the distance of the head part in the first direction, the head part has a certain movement allowance during pressing of the rod part, which can also prevent the rod part from being damaged due to a continuous inclined pressing process. In this example, the change in the hole diameter of the through hole and the gradual contact between the second heating plate and the head part during pressing of the second mold core can play a good automatic correction effect of the rod part, thereby improving the processing quality of the lens.

[0020] In some embodiments, the lens molding system further includes an image detection device and a heat insulation structure. The image detection device is located within the heat insulation structure and is used to detect at least a portion of the molding equipment and / or the lens through a transparent heat-insulating window of the heat insulation structure. In this embodiment, the image detection device can be, for example, a charge-coupled device (CCD) camera or other devices with image detection capabilities. Because the image detection device is located within the heat insulation structure, it can perform image detection under high-temperature conditions (e.g., 300°C-700°C) and is less prone to high-temperature damage. Here, "at least a portion of the molding equipment" can include, for example, a first mold core, a second mold core, a mold base, etc. Image detection can determine whether the first mold core, second mold core, mold base, etc., have surface residues or damage, as well as the surface quality of the lens, etc.

[0021] In some embodiments, the lens molding system further includes a fixed adjustment structure, wherein the image detection device and the heat insulation structure are mounted on the movable end of the fixed adjustment structure. Thus, the fixed adjustment structure can be used to move the image detection device and the heat insulation structure, allowing the image detection device to perform image detection at least a portion of the molding equipment and / or the lens from more angles, thereby improving the accuracy and reliability of the detection function.

[0022] In some embodiments, the fixed adjustment structure includes a first moving mechanism and / or a second moving mechanism. The first moving mechanism drives the image detection device to move along a first direction; the second moving mechanism drives the image detection device to move in a plane perpendicular to the first direction; the first direction is parallel to the axis of the guide receiving hole. This allows for relatively comprehensive inspection of at least a portion and / or the lens of the molding equipment.

[0023] In some embodiments, the fixed adjustment structure includes a flexible arm mechanism for driving the image detection device to move along multiple angles. This allows for more comprehensive inspection of at least a portion and / or the lens of the molding equipment.

[0024] In some embodiments, the number of guide receiving holes, the first mold core, and the second mold core are all multiple and correspond one-to-one. In this example, multiple parts to be processed can be extruded simultaneously, resulting in higher efficiency. For example, the multiple guide receiving holes can be arranged in a circular array or a rectangular array. This makes the arrangement more regular, ensures uniform heating of each lens during extrusion molding, and reduces the likelihood of mutual interference.

[0025] In some embodiments, the preparation station comprises: a plurality of independent heating chambers, and the last heating chamber is configured to provide the workpiece to the first feeding mechanism; a first conveying mechanism configured to convey the workpiece through the plurality of independent heating chambers; and a second feeding robot configured to place a glass preform into the first heating chamber, the glass preform being the workpiece. In this way, the workpiece can be stably controlled, and the processing reliability is improved.

[0026] In some embodiments, the preparation station comprises: a plurality of independent first cooling chambers, and the last first cooling chamber is configured to provide the workpiece to the first feeding mechanism; a second conveying mechanism configured to convey the workpiece through the plurality of independent first cooling chambers; and a melting and extruding device configured to extrude a glass material into the workpiece and place the workpiece in the first first cooling chamber. In this way, the workpiece can be stably controlled, and the processing reliability is improved.

[0027] In some embodiments, the cooling station comprises: a plurality of independent second cooling chambers, and the first second cooling chamber is configured to receive the lens taken out of the molding device by the first feeding mechanism; a third conveying mechanism configured to convey the lens through the plurality of independent second cooling chambers; and a second feeding robot configured to take out the lens when the lens is conveyed to the last second cooling chamber. In this way, the lens can be stably controlled, and the processing quality of the lens is improved.

[0028] In another aspect, a lens molding method is provided, comprising: moving a workpiece to a molding device when the workpiece is at a first preset temperature value; processing the workpiece into a lens by using the molding device; and taking out the lens from the molding device when the lens in the molding device is cooled to a second preset temperature value; wherein the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material.

[0029] In some examples, the absolute value of the difference between the first preset temperature value and the lower limit of the high-elasticity temperature range of the glass material is less than or equal to 100℃, and the absolute value of the difference between the second preset temperature value and the lower limit of the high-elasticity temperature range of the glass material is less than or equal to 100℃.

[0030] When the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass, the to-be-processed piece is in a solid state or substantially in a solid state during movement to the mold forming device, so that the to-be-processed piece is not easy to deform during movement, and further, the formed lens has high surface precision and is not easy to deform after the mold forming device processes the to-be-processed piece (for example, after forming and shaping to form a lens). Here, the lens extraction temperature (that is, the second preset temperature value) can not be limited, and compared with the scheme of not controlling the temperature (that is, the second preset temperature value) of the to-be-processed piece put into the mold forming device, the quality of the finally formed lens can be better improved.

[0031] When the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass, the lens is in a solid state or substantially in a solid state during extraction from the mold forming device, so that the lens is not easy to deform during movement after processing and forming, and further, the finally extracted lens has high surface precision and is not easy to deform.

[0032] When the first preset temperature and the second preset temperature are both less than or equal to the lower limit of the high-elasticity temperature range of the glass, the lens has better processing quality by comprehensively considering the advantages of the above two aspects, and details are not repeated here.

[0033] The lens mold forming method provided by the embodiment of the application can effectively improve the processing quality of the lens. In addition, because the method has a shorter time of the to-be-processed piece in the mold compared with the previous isothermal mold forming scheme, the processing efficiency of the lens is also improved, that is, the embodiment of the application can simultaneously consider the quality and processing efficiency of the lens. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A structural block diagram of an electronic device provided by the embodiment of the application;

[0035] Figure 2 A curve diagram of the relationship between the temperature and deformation of a glass material;

[0036] Figure 3 A schematic diagram of a single-station structure during isothermal mold forming;

[0037] Figure 4 A schematic diagram of a multi-station structure during isothermal mold forming;

[0038] Figure 5 A schematic diagram of a mold forming process during non-isothermal mold forming;

[0039] Figure 6 A flowchart of the lens mold forming method provided by the embodiment of the application;

[0040] Figure 7This is a schematic diagram of a process flow for a lens molding method provided in an embodiment of this application;

[0041] Figure 8 This is a schematic diagram of another process flow for the lens molding method provided in the embodiments of this application;

[0042] Figure 9 This is a structural block diagram of the lens molding system provided in the embodiments of this application;

[0043] Figure 10 A structural diagram of a lens molding system provided in this application embodiment;

[0044] Figure 11 A structural diagram of another lens molding system provided in this application embodiment;

[0045] Figure 12 This is a schematic diagram of the structure of a carrier disk provided in an embodiment of this application;

[0046] Figure 13 for Figure 12 A schematic diagram of an array of multi-mold cavity structures in a carrier disk;

[0047] Figure 14 A schematic diagram illustrating multiple workpieces to be processed being picked up by a suction cup, as provided in an embodiment of this application;

[0048] Figure 15 A schematic diagram illustrating the suction cup picking up multiple lenses according to an embodiment of this application;

[0049] Figure 16 A schematic diagram of the first compression molding equipment provided in this application embodiment before compression molding;

[0050] Figure 17 This is a schematic diagram of the first type of compression molding equipment provided in the embodiments of this application during compression molding;

[0051] Figure 18 A three-dimensional structural diagram of region A and region B in the first type of compression molding equipment provided in the embodiments of this application;

[0052] Figure 19 A schematic diagram of a self-guided positive mold closing scheme provided in an embodiment of this application;

[0053] Figure 20 A schematic diagram of a self-guided positive mold closing scheme with a demolding mechanism provided in an embodiment of this application;

[0054] Figure 21 This is a schematic diagram of the second type of compression molding equipment provided in the embodiments of this application before compression molding;

[0055] Figure 22A schematic diagram of a second mold pressing equipment provided by the embodiment of the present application during mold pressing;

[0056] Figure 23 A schematic diagram of the second mold pressing equipment provided by the embodiment of the present application after mold pressing;

[0057] Figure 24 A corresponding relationship diagram of the first heating plate and the mold base provided by the embodiment of the present application;

[0058] Figure 25 A corresponding relationship diagram of the ejector pin, the first heating plate and the mold base provided by the embodiment of the present application;

[0059] Figure 26 A structural diagram of another mold pressing equipment provided by the embodiment of the present application;

[0060] Figure 27 A detection schematic diagram of an image detection device provided by the embodiment of the present application;

[0061] Figure 28 A detection schematic diagram of another image detection device provided by the embodiment of the present application;

[0062] Figure 29 A detection schematic diagram of another image detection device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application.

[0064] Hereinafter, the terms “first”, “second”, and the like are used only for description convenience, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second”, and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the meaning of “a plurality of” is two or more.

[0065] In the embodiments of the present application, unless otherwise explicitly specified and limited, the term “electrically connected” can be direct electrically connected or indirect electrically connected through an intermediate medium.

[0066] In the embodiments of the present application, the words “exemplary” or “for example” are used to represent an example, illustration, or description. Any embodiment or design scheme described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the words “exemplary” or “for example” are intended to present the relevant concept in a specific manner.

[0067] In the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0068] In the embodiments of this application, the directional indications used to explain the structure and movement of different components, such as up, down, left, right, front, and back, are relative. These indications are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, these directional indications will also change accordingly.

[0069] Figure 1 This is a structural block diagram of an electronic device 2000 provided in an embodiment of this application. Figure 1 As shown, the electronic device 2000 includes a lens 01, which can be used to process light (such as internal light, external ambient light, etc.). The electronic device 2000 can be, for example, a mobile terminal such as a mobile phone, camera, tablet computer, handheld computer, or personal digital assistant (PDA); a smart home device such as a smart TV or smart camera; a wearable device such as a smart bracelet, smartwatch, or smart glasses; or other desktop, laptop, notebook, ultra-mobile personal computer (UMPC), netbook, or smart screen device. In some examples, the lens 01 is located in the camera module of the electronic device 1000; that is, the camera module can include one or more lenses 01. In this case, the lens 01 is an important component of the camera module. For example, in mobile phones, to enhance competitiveness, considerations may be given to improving the processing efficiency, quality, and thinness of the lens to reduce the cost of the camera module, reduce the height of the camera module protruding from the back cover of the phone to improve the phone's appearance, and improve the imaging quality of the camera module to improve the phone's photography performance.

[0070] Lens 01 is primarily made of glass. The changes in the state of this glass material during the manufacturing process of lens 01 can be found in [reference needed]. Figure 2 . Figure 2 This is a graph showing the relationship between temperature and deformation of a glass material, combined with... Figure 2It can be seen that Tb is the critical temperature of the glass material from the glass state to the glass transition region, the temperature of Tb is about 420 DEG C; Tg is the critical temperature of the glass material from the glass transition region to the high elastic state, the temperature of Tg is about 457 DEG C; Tf is the critical temperature of the glass material from the high elastic state to the viscous flow transition region, the temperature of Tf is about 490 DEG C; Td is the critical temperature of the glass material from the high elastic state to the viscous flow state, Td is greater than Tf. Among them, "about" means that Tb, Tg and Tf can have a certain deviation on the basis of the described temperature, such as floating up and down 10 DEG C, or floating up and down 5 DEG C, etc.

[0071] The processing mode of the lens 01 mainly includes two kinds, one is isothermal molding, and the other is non-isothermal molding.

[0072] Figure 3 It is a schematic diagram of single-station structure when isothermal molding. Among them, the single-station structure 91 includes one molding equipment 911 and one mold 912, the molding equipment 911 includes an upper heating platen 901 (including an upper platen 9011 and an upper heating plate 9012) and a lower heating platen 904 (including a lower platen 9042 and a lower heating plate 9041), the mold 912 is located between the upper heating platen 901 and the lower heating platen 904, the mold 912 includes an upper mold 902 and a lower mold 903, the workpiece 00 to be processed can be placed between the upper mold 902 and the lower mold 903, and then pressed by the molding equipment 911 to form the lens 01. However, in this single-station process, the temperature of the workpiece 00 to be processed rises and falls with the temperature of the mold 912 and the temperature of the molding equipment 911, which leads to low production efficiency of the lens 01 and high production cost.

[0073] Figure 4 It is a schematic diagram of multi-station structure when isothermal molding. Among them, the multi-station structure 92 includes 8 molding equipment 911 and 1 mold 912 (the radial dimension can be 60 mm), each molding equipment 911 corresponds to different temperature (from left to right corresponding to heating stage, target temperature stage, slow cooling stage, among them, heating stage includes 22 DEG C preheating 1, 380 DEG C preheating 2, 580 DEG C preheating 3, target temperature stage includes 620 DEG C molding, 600 DEG C pressure holding, slow cooling stage includes 480 DEG C cooling 1, 240 DEG C cooling 2, 22 DEG C cooling 3). After the workpiece 00 to be processed is placed in the mold 912, it can be sequentially pressed by each molding equipment 911 from left to right, and finally form the lens 01. When each molding equipment 911 is pressed into the mold 912 with the workpiece 00 to be processed, the temperature of the workpiece 00 to be processed rises or falls with the temperature of the mold 912, and the mold 912 with the workpiece 00 to be processed needs to be moved constantly, which will lead to lower production efficiency of the lens 01, and because multiple molding equipment 911 need to work together, the production cost will also be very high.

[0074] Figure 5 A schematic diagram of a molding process for non-isothermal compression molding. Wherein, the workpiece 00 to be processed is preheated to 500°C, i.e. in a softened state; then the softened workpiece 00 is transferred into the mold 912 for compression molding (including the t1 stage and the t2 stage in the figure, the t1 stage is preheated to 580°C and then pressurized to P1; the t2 stage is annealed and then depressurized to P2), to form a lens 01; finally, the lens 01 is taken out when it is not cooled to solidification (such as 500°C as shown in the figure). In this way, compared with isothermal compression molding, the heating and cooling time of the mold 912 can be reduced, the production efficiency is improved, and the production cost is reduced. However, the present inventors have found through in-depth research that since the workpiece 00 before molding and the lens 01 after molding are in a softened state of glass, position transfer occurs, which can easily cause problems such as poor surface precision and deformation.

[0075] Based on the above analysis, the embodiments of the present application provide a lens compression molding system and method for improving the processing quality and efficiency of the lens.

[0076] Figure 6 A flowchart of the lens compression molding method provided by the embodiments of the present application, Figure 7 A process flow schematic diagram of the lens compression molding method provided by the embodiments of the present application, Figure 8 Another process flow schematic diagram of the lens compression molding method provided by the embodiments of the present application. The lens compression molding method includes S1-S3.

[0077] S1, when the workpiece to be processed is at a first preset temperature value, moving the workpiece to be processed into a compression molding device.

[0078] In this step, the workpiece 00 to be processed can be a glass preform for forming a lens (see Figure 7 ), or can be, for example, an extruded piece formed by melt extrusion, such as a piece similar in shape to the glass preform (see Figure 8 ). The compression molding device here can be the single-station structure 91 mentioned above, or the compression molding device can be the compression molding device in the compression molding system introduced later in the present application. The workpiece to be processed can be moved into the compression molding device when it is at the first preset temperature value.

[0079] S2, using the compression molding device to process the workpiece to be processed into a lens.

[0080] In this step, the workpiece in the molding equipment can be molded (such as including the forming and shaping stages), so as to form a lens. For example, the molding temperature range is Ts+ (15℃-50℃). Wherein Ts is the softening temperature, which refers to the temperature at which the sample reaches a certain deformation under certain conditions such as sample size, heating rate, and external force application mode. The softening temperature Ts is greater than Td.

[0081] S3, when the lens in the molding equipment is cooled to the second preset temperature value, the lens is taken out of the molding equipment.

[0082] In this step, the lens in the molding equipment can be moved out of the molding equipment when it is cooled to the second preset temperature value.

[0083] The movement of the workpiece and the lens can be achieved by a robot. The robot can have a suction cup to achieve the suction of the workpiece and the lens. In addition, the robot can be configured to have multiple degrees of freedom, such as movement and rotation along the X-Y-Z three axes, i.e., six degrees of freedom. In addition, the robot can also be a flexible arm mechanism, so as to achieve more directional and angular movement. For example, the robot for moving the workpiece and the lens can be the same or different, for example, two robots are provided for moving the workpiece and the lens, respectively. In addition, since the working temperature of the molding equipment is relatively high, for example, the working temperature can be 400℃-600℃, therefore, the robot for moving the workpiece and the lens needs to have high-temperature resistance, at this time, the robot for moving the workpiece and the lens can be made of high-temperature resistant materials, or a high-temperature resistant protective layer can be made on the periphery of the robot. The specific material and formation of the protective layer are not limited here.

[0084] In combination with Figure 7 and Figure 8 As shown in the above lens molding method, the first preset temperature value and / or the second preset temperature value is configured to be less than or equal to the lower limit of the high-elasticity temperature range of the glass (such as Tg). For example, the first preset temperature value and / or the second preset temperature value can be reduced by 0℃-100℃ based on the lower limit of the high-elasticity temperature range; for example, it can also be reduced by 20℃-50℃ based on the lower limit of the high-elasticity temperature range; for example, it can also be reduced by 60℃-120℃ based on the lower limit of the high-elasticity temperature range. For example, the first preset temperature value and / or the second preset temperature value can also be configured to be less than or equal to the upper limit of the glass temperature range (such as Tb). In some glass materials, for example Figure 2As shown, the temperature of the upper limit of the high-elasticity temperature range, i.e., the temperature of Tg, can be 457℃. The temperature of the upper limit of the glassy temperature range, i.e., the temperature of Tb, can be 420℃. In some examples, the first preset temperature can be 400℃, and the second preset temperature can also be 400℃.

[0085] When the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass, the state of the workpiece during movement into the mold forming device is solid or substantially solid, so that the workpiece is not easily deformed during movement, and further, the surface precision of the lens formed after the mold forming device processes the workpiece (such as forming, shaping to form a lens) is high and is not easily deformed. Here, the extraction temperature of the lens (i.e., the second preset temperature value) can not be limited, and compared with the scheme of not controlling the temperature (i.e., the second preset temperature value) of the workpiece put into the mold forming device, the quality of the lens formed finally can still be improved better.

[0086] When the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass, the lens is in a solid or substantially solid state during extraction from the mold forming device, so that the lens is not easily deformed during movement after processing and forming, and further, the surface precision of the lens extracted finally is high and is not easily deformed.

[0087] When both the first preset temperature and the second preset temperature are less than or equal to the lower limit of the high-elasticity temperature range of the glass, the lens with better processing quality can be obtained by comprehensively combining the advantages of the above two aspects, which will not be described here.

[0088] In addition, it is known from experiments that, when the mold is cooled to 22℃ to extract the lens and the mold is 400℃ to extract the lens, the surface PV value of the lens obtained by cooling the mold to 22℃ to extract the lens is 0.8031 μm, and the surface PV value of the lens obtained by extracting the lens when the mold is 400℃ is 0.8709 μm. It can be seen that, when the lens is removed at 400℃, the lens has completely solidified into a glassy state, and the lens surface is not affected. Therefore, the lens mold forming method provided in the embodiments of the present application can effectively improve the processing quality of the lens. In addition, since the method has a shorter time of the workpiece in the mold compared with the previous isothermal mold forming scheme, the processing efficiency of the lens is also improved, that is, the embodiments of the present application can take into account the quality and processing efficiency of the lens at the same time.

[0089] For example, when the workpiece is a glass preform, the lens mold forming method can further include: multi-stage heating of the glass preform, so that the workpiece reaches the first preset temperature. Each stage of heating can be implemented in a closed chamber (the structure of the chamber will be described in detail later).

[0090] Exemplarily, when the workpiece to be processed is an extruded workpiece formed by melt extrusion, for example, an extruded workpiece similar in shape to a glass preform, the lens mold forming method can further include: subjecting the extruded workpiece to multi-stage temperature reduction, so that the extruded workpiece reaches a first preset temperature. Each stage of temperature increase can be achieved in a closed chamber (the structure of the chamber will be described in detail later).

[0091] After the lens is formed, the lens mold forming method can further include: subjecting the lens to multi-stage temperature reduction, so that the lens reaches a second preset temperature. Each stage of temperature reduction can be achieved in a closed chamber (the structure of the chamber will be described in detail later).

[0092] In the foregoing, the lens mold forming method provided by the embodiments of the present application is introduced. In the following, the lens mold forming system provided by the embodiments of the present application will be described in detail.

[0093] Figure 9 A structural diagram of a lens mold forming system 100 provided by an embodiment of the present application is shown in FIG. 1. The lens mold forming system 100 includes a preparation station 10, a forming station 20, and a cooling station 30. The forming station 20 includes a mold forming device 1 and a first feeding and unloading mechanism 2. The first feeding and unloading mechanism 2 is configured to move a workpiece 00 in the preparation station 10 to the mold forming device 1 when the workpiece 00 is at a first preset temperature value, and the mold forming device 1 is configured to process the workpiece 00 into a lens 01. The first feeding and unloading mechanism 2 is further configured to move the lens 01 to the cooling station 30 when the lens 01 in the mold forming device 1 cools to a second preset temperature value. The first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material.

[0094] In the present embodiment, the first preset temperature value and the second preset temperature value are not repeated, and the specific description can be referred to the foregoing description. Since the lens mold forming system 100 includes the preparation station 10, the forming station 20, and the cooling station 30, and the forming station 20 includes the mold forming device 1 and the first feeding and unloading mechanism 2, the first feeding and unloading mechanism 2 can be used to control the movement of the workpiece 00 before mold forming and the lens 01 after mold forming. Specifically, along the flow sequence of the preparation station 10, the forming station 20, and the cooling station 30, the workpiece 00 can be processed into the lens 01 in the mold forming device of the forming station 20. In addition, since the first preset temperature value and / or the second preset temperature value are optimized in the present embodiment, it can be known from the foregoing description that the present embodiment is also beneficial to greatly improving the processing quality and processing efficiency of the lens 01.

[0095] Figure 10 A structural diagram of a lens mold forming system 100 provided by an embodiment of the present application is shown in FIG. 1. The lens mold forming system 100 includes a preparation station 10, a forming station 20, and a cooling station 30. The forming station 20 includes a mold forming device 1 and a first feeding and unloading mechanism 2. The first feeding and unloading mechanism 2 is configured to move a workpiece 00 in the preparation station 10 to the mold forming device 1 when the workpiece 00 is at a first preset temperature value, and the mold forming device 1 is configured to process the workpiece 00 into a lens 01. The first feeding and unloading mechanism 2 is further configured to move the lens 01 to the cooling station 30 when the lens 01 in the mold forming device 1 cools to a second preset temperature value. The first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material. Figure 11A structural diagram of another lens molding system 100 provided in an embodiment of this application is shown below. Figure 10 and Figure 11 The preparatory station in the embodiments of this application will be described in detail.

[0096] Example 1 of the preparatory station: Combining Figure 10 As shown, the preparatory station 10 includes a second loading robot 101, a first conveying mechanism 102, and multiple independent heating chambers 103. The second loading robot 101 places the glass preform into the first heating chamber 103 (e.g., onto a support tray within the first heating chamber), where the glass preform is the workpiece 00 to be processed, used for subsequent processing to form the lens 01. The first conveying mechanism 102 transports the workpiece 00 through the multiple independent heating chambers 103 sequentially. The final heating chamber 103 provides the workpiece 00 to the first loading / unloading mechanism 2, allowing the first loading / unloading mechanism 2 to move the workpiece 00 to the molding equipment 1 when it is at a first preset temperature value in the preparatory station 10. For example, the temperature of the multiple independent heating chambers 103 can gradually increase, and the temperature of the final heating chamber 103 can be equal to or close to (e.g., not exceeding a temperature difference of 10°C, 20°C, or 30°C) the first preset temperature value.

[0097] The structure of the second loading robot 101 can be referred to the previous description of the robot. For example, it can be an XYZ three-axis robot or a flexible arm mechanism. The second loading robot 101 can be located in the room temperature tray area, and the temperature of the room temperature tray area can be, for example, 22°C.

[0098] The multi-stage independent heating chamber 103 can be located in the preparation zone, and the temperature of the preparation zone can be, for example, Tb - (20℃-50℃). The first conveying mechanism 102 can extend from the room temperature tray area to the preparation zone.

[0099] The heating chamber 103 can have 2-8 stages ( Figure 10 (The diagram uses level 3 as an example). The multi-stage independent heating chambers 103 in the preparatory station 10 can be arranged horizontally, vertically, or simultaneously in a stepped arrangement along both horizontal and vertical directions, or arranged in other ways such as rotation. The specific arrangement can be determined according to actual space constraints and other needs, and this application does not impose any restrictions on this. Correspondingly, the first conveying mechanism 102 can also correspond to the arrangement of the multi-stage independent heating chambers 103 to achieve step-by-step conveying in horizontal, vertical, and other directions. This application also does not impose any restrictions on the specific implementation of the first conveying mechanism 102.

[0100] The temperature rising chamber 103 is airtight, and each two adjacent temperature rising chambers 103 can have a closable door. The first conveying mechanism 102 can transfer the workpiece 00 to the next temperature rising chamber 103 when the corresponding door is opened. For example, when the door between the first temperature rising chamber 103 and the second temperature rising chamber 103 is opened, the door between the second temperature rising chamber 103 and the third temperature rising chamber 103 is closed, so as to avoid the temperature influence between the multiple temperature rising chambers 103, and to achieve better temperature control effect.

[0101] The temperature rising chamber 103 can be a temperature rising chamber 103 filled with nitrogen (N2), so as to better control the temperature of the workpiece 00 located therein.

[0102] Preparation station example two: combination Figure 11 As shown, the preparation station 10 includes a melting extrusion device 104, a second conveying mechanism 105, and multiple independent first cooling chambers 106. The melting extrusion device 104 is used to extrude the glass raw material (for example, including the glass material mentioned above) into an extruded workpiece, i.e., the workpiece 00, so that the workpiece 00 is located in the first first cooling chamber 106. The second conveying mechanism 105 is used to convey the workpiece 00 through the multiple independent first cooling chambers 106 in sequence. The last first cooling chamber 106 is used to provide the workpiece 00 to the first feeding and discharging mechanism 2. In this way, the first feeding and discharging mechanism 2 can move the workpiece 00 to the mold forming device 1 when the workpiece 00 in the preparation station 10 is at the first preset temperature value. For example, the temperature of the last first cooling chamber 106 can be equal to or close to (for example, not more than 10℃, 20℃, or 30℃, etc.) the first preset temperature value.

[0103] The melting extrusion device 104, the second conveying mechanism 105, and the multiple independent first cooling chambers 106 can be located in a preparation area, and the temperature of the preparation area can be Tb-(20℃-50℃), for example.

[0104] The melting extrusion device 104 can have an inlet and an outlet. The inlet is used to put in the glass raw material, and the outlet can be opposite to the first first cooling chamber 106 (such as the bearing disc in the first first cooling chamber 106). In this way, the workpiece 00 extruded by the melting extrusion device 104 can directly fall into the bearing disc in the first first cooling chamber 106, and then be conveyed by the second conveying mechanism 105.

[0105] The number of the first cooling chambers 106 can be 2-8 Figure 11(The diagram uses a level 3 example). The multi-level independent first cooling chambers 106 in the preparatory station 10 can be arranged horizontally, vertically, or simultaneously in a stepped arrangement along both horizontal and vertical directions, or arranged in other ways such as rotation. The specific arrangement can be determined according to actual space constraints and other needs, and this application does not impose any restrictions on this. Correspondingly, the second conveying mechanism 105 can also correspond to the arrangement of the multi-level independent first cooling chambers 106 to realize step-by-step conveying in horizontal, vertical, and other directions. This application also does not impose any restrictions on the specific implementation of the second conveying mechanism 105.

[0106] The first cooling chamber 106 is sealed, and each pair of adjacent first cooling chambers 106 may have a closable door. The second conveying mechanism 105 can transfer the workpiece 00 to the next level of first cooling chamber 106 when the corresponding door is opened. For example, the doors can be opened individually. When the door between the first and second level first cooling chambers 106 is opened, the door between the second and third level first cooling chambers 106 is closed. This can prevent the temperatures of multiple first cooling chambers 106 from affecting each other, resulting in better temperature control.

[0107] The first cooling chamber 106 can be filled with nitrogen (N2), which allows for better control of the temperature of the workpiece 00 located inside.

[0108] The cooling station in the embodiments of this application will be described in detail below.

[0109] Combination Figure 10 and Figure 11 As shown, the cooling station 30 includes multiple independent second cooling chambers 107, a third conveying mechanism 108, and a second unloading robot 109. The first-stage second cooling chamber 107 (such as the support tray within the first-stage second cooling chamber 107) receives the lens 01 removed from the molding equipment 1 by the first unloading mechanism 2. The third conveying mechanism 108 transports the lens 01 sequentially through the multiple independent second cooling chambers 107. The second unloading robot 109 removes the lens 01 when it is transported to the last stage of the second cooling chamber 107. Thus, the first unloading mechanism 2 can move the lens 01 to the first-stage second cooling chamber 107 when the lens 01 in the molding station 20 is at a second preset temperature value. For example, the temperature of the multiple independent second cooling chambers 107 can gradually decrease, and the temperature of the last stage of the second cooling chamber 107 can be equal to or close to room temperature, such as 22°C.

[0110] The structure of the second unloading mechanical arm 109 can refer to the description of the mechanical arm above, for example, it can be an X-Y-Z three-axis mechanical arm, or a flexible arm mechanism, etc. In some examples, the second unloading mechanical arm 109 and the second loading mechanical arm 101 are the same mechanical arm (i.e. Figure 10 and Figure 11 This is beneficial to reduce the cost of hardware equipment. In other examples, the second unloading mechanical arm 109 and the second loading mechanical arm 101 are two mechanical arms, which is beneficial to further improve the processing efficiency of the lens 01.

[0111] The second unloading mechanical arm 109 can be located in the room temperature tray arranging area, and the temperature of the room temperature tray arranging area can be, for example, 22°C.

[0112] The multi-stage independent second cooling chamber 107 can be located in the cooling area, and the temperature of the cooling area can be, for example, Tb-(20°C-50°C). The third conveying mechanism 108 can extend from the cooling area to the room temperature tray arranging area.

[0113] The number of stages of the second cooling chamber 107 can be 2-8 stages (for example, 3 stages are taken as an example in the following description). Figure 10 and Figure 11 The multi-stage independent second cooling chamber 107 in the cooling station 30 can be arranged horizontally, vertically, or in a stepped manner along the horizontal and vertical directions, or in other ways such as rotation, and the specific arrangement can be determined according to the actual space limitation and other needs. The present application does not limit this. Correspondingly, the third conveying mechanism 108 can also correspond to the arrangement of the multi-stage independent second cooling chamber 107 to realize the step-by-step conveying in the horizontal, vertical, and other directions. The specific implementation of the third conveying mechanism 108 is not limited by the present application.

[0114] The second cooling chamber 107 is closed, and each adjacent two-stage second cooling chamber 107 can have a closable door. The third conveying mechanism 108 can transfer the workpiece 00 to the next stage second cooling chamber 107 when the corresponding door is opened. For example, the door can be opened separately, for example, when the door between the first-stage second cooling chamber 107 and the second-stage second cooling chamber 107 is opened, the door between the second-stage second cooling chamber 107 and the third-stage second cooling chamber 107 is closed. This can avoid the mutual influence of the temperatures of multiple second cooling chambers 107, and achieve better temperature control effect.

[0115] The second cooling chamber 107 can be a second cooling chamber 107 filled with nitrogen (N2), which can better control the temperature of the lens 01 located therein.

[0116] The carrying tray in the preparation station and the cooling station in the embodiments of the present application will be described in detail below.

[0117] Figure 12 A schematic view of a structure of a carrier plate provided in an embodiment of the present application, Figure 13 A schematic view of a structure of a carrier plate provided in an embodiment of the present application, Figure 12 A schematic view of a structure of an array multi-mold cavity structure 82 in the carrier plate. As shown in Figure 12 The carrier plate can include a carrier plate 81 and one or more array multi-mold cavity structures 82 on the carrier plate 81, for example Figure 12 Three array multi-mold cavity structures 82 are arranged in a "T" shape as shown in Figure 13 Each array multi-mold cavity structure 82 can include a plurality of mold cavities 83 (such as 2-66 mold cavities 83), and the plurality of mold cavities 83 in each array multi-mold cavity structure 82 can be arranged in a circumferential array, a rectangular array, or various other arrangements. It can be understood that the carrier plate herein can be a carrier plate in the preparation station 10, for example, a carrier plate that can move with the first conveying mechanism 102 in the preparation station 10, or a carrier plate that can move with the second conveying mechanism 105 in the preparation station 10; or it can also be a carrier plate in the cooling station 30, for example, a carrier plate that can move with the third conveying mechanism 108 in the cooling station 30.

[0118] Figure 14 A schematic view of a plurality of workpieces 00 being sucked by a suction cup provided in an embodiment of the present application. The suction cup herein can be a suction cup of the first loading and unloading mechanism, a suction cup of the second loading and unloading mechanism. In this way, the plurality of workpieces 00 can be directly moved in cooperation with the array multi-mold cavity structure and the mold pressing forming device.

[0119] Figure 15 A schematic view of a plurality of lenses 01 being sucked by a suction cup provided in an embodiment of the present application. The suction cup herein can be a suction cup of the first loading and unloading mechanism, a suction cup of the second loading and unloading mechanism. In this way, the plurality of lenses 01 can be directly moved in cooperation with the array multi-mold cavity structure and the mold pressing forming device.

[0120] The mold pressing forming device 1 and the first loading and unloading mechanism 2 in an embodiment of the present application will be described in detail below.

[0121] Figure 16 A schematic view of a first mold pressing forming device provided in an embodiment of the present application before mold pressing, Figure 17 A schematic view of the first mold pressing forming device provided in an embodiment of the present application during mold pressing, Figure 18 A schematic view of a first mold pressing forming device provided in an embodiment of the present application before mold pressing,

[0122] In some embodiments, in combination with Figure 16-18As shown, the mold pressing equipment 1 comprises a first pressing plate 71 and a second pressing plate 72 arranged oppositely, a movement mechanism 73 connected to the first pressing plate 71 and the second pressing plate 72, and the movement mechanism 73 is used to control the distance between the first pressing plate 71 and the second pressing plate 72. Here, the movement mechanism 73 can control the first pressing plate 71 to move and the second pressing plate 72 to be stationary, or the movement mechanism 73 can control the second pressing plate 72 to move and the first pressing plate 71 to be stationary, or the movement mechanism 73 can control the first pressing plate 71 and the second pressing plate 72 to move simultaneously. In some examples, the movement mechanism 73 can comprise a telescopic rod 731 connected between the first pressing plate 71 and the second pressing plate 72, at this time, one end of the telescopic rod 731 is connected to the first pressing plate 71 (for example, a first connecting part 732 with a first connecting hole K1 can be arranged on the first pressing plate 71, the first connecting part 732 can be welded with the first pressing plate 71, and the first connecting hole K1 can be threadedly connected or clamped with the other end of the telescopic rod 731), and the other end of the telescopic rod 731 is connected to the second pressing plate 72 (for example, the second pressing plate 72 can also have a second connecting hole K2, and the second connecting hole K2 is threadedly connected or clamped with the other end of the telescopic rod 731), thereby, when the first pressing plate 71 is fixed, the second pressing plate 72 can be pushed to approach or move away from the first pressing plate 71 by the telescopic rod 731; or, when the second pressing plate 72 is fixed, the first pressing plate 71 can be pushed to approach or move away from the second pressing plate 72 by the telescopic rod 731.

[0123] In addition, as shown in Figure 16-18 The mold pressing equipment 1 further comprises a mold base 74, a first mold core 741 and a second mold core 742. The mold base 74 is located between the first pressing plate 71 and the second pressing plate 72. In combination with Figure 19 As shown, Figure 19 A schematic diagram of a self-guiding and normalizing die closing scheme provided by the embodiment of the present application is shown in the figure. The mold base 74 comprises a guiding and accommodating hole 740. At least part of the first mold core 741 can be located in the guiding and accommodating hole 740. The second mold core 742 is located between the mold base 74 and the second pressing plate 72, and at least part of the second mold core 742 can extend into the guiding and accommodating hole. The second mold core 742 is used to cooperate with the first mold core 741 to extrude the workpiece 00 into the lens 01 in the guiding and accommodating hole 740.

[0124] In the embodiment, the mold base 74 comprising the guiding and accommodating hole 740 is provided, and the second mold core 742 can be pressed into the guiding and accommodating hole 740 by the mutual movement of the first pressing plate 71 and the second pressing plate 72, so as to cooperate with the first mold core 741 in the guiding and accommodating hole 740 to extrude the workpiece 00 into the lens 01 in the guiding and accommodating hole 740. Since the guiding and accommodating hole 740 is provided, the lens 01 is more stable and reliable during forming, and is not prone to mispositioning defects, that is, the lens yield is improved.

[0125] For example,Figure 18 The number of the guide accommodating holes 740, the first mold stems 741 and the second mold stems 742 is multiple, and they are one-to-one corresponding. In this example, multiple pieces 00 to be processed can be simultaneously subjected to the extrusion molding, and the efficiency is higher. For example, the multiple guide accommodating holes 740 can be arranged in a circumferential array or a rectangular array. In this way, the arrangement is more regular, and the pieces are uniformly heated during the extrusion molding process, and are not easily affected by each other.

[0126] For example, a limiting structure can be added between the guide accommodating hole 740 and the first mold stem 741. For example, the limiting structure can include a sliding block arranged on the sidewall of the first mold stem 741, and a sliding groove arranged on the inner wall of the guide accommodating hole 740. In this way, the first mold stem 741 can be limited in the guide accommodating hole 740, and the first mold stem 741 can slide along the axis direction (Y direction) of the guide accommodating hole 740 for a distance. In some examples, the distance can make the first mold stem 741 protrude out of the guide accommodating hole 740 close to the surface of the second pressing plate 72.

[0127] In some embodiments, as shown in Figure 16-18 The molding device 1 further includes a first heating plate 751 and a mold seat fixing member 76. The first heating plate 751 is located between the mold seat 74 and the first pressing plate 71. The mold seat fixing member 76 is connected with the first heating plate 751 (for example, the connection can be achieved by fasteners such as bolts 761), and the mold seat fixing member 76 includes a clamping jaw 762 which abuts against the surface of the edge of the mold seat 74 away from the first heating plate 751. In this way, the movement of the mold seat 74 relative to the first heating plate 751 can be limited, the reliability of the device is improved, and the first heating plate 751 can be used to stably heat the mold seat 74 and the first mold stem 741, so as to realize the heat transfer to the piece to be processed.

[0128] For example, one side of the first heating plate 751 away from the mold seat 74 can be in effective contact with the first pressing plate 71 under the action of gravity; or in some examples, an adhesive structure, a clamping structure or other fixing structure can be arranged between the first heating plate 751 and the first pressing plate 71 to limit the movement of the first heating plate 751 relative to the first pressing plate 71, and the reliability is improved.

[0129] For example, since the first heating plate 751 is located between the mold seat 74 and the first pressing plate 71, the first heating plate 751 can also be used to limit the first mold stem 741 from sliding out of the opening of the guide accommodating hole 740 close to the first heating plate 751.

[0130] Figure 20 A schematic view of a self-guiding and closing mold scheme provided by the embodiment of the present application and containing a demolding mechanism, Figure 21 A schematic view of a second molding device before molding provided by the embodiment of the present application,Figure 22 A schematic view of the second mold pressing equipment provided by the embodiment of the present application during mold pressing, Figure 23 A schematic view of the second mold pressing equipment provided by the embodiment of the present application after mold pressing. Figure 20-23 The first pressing plate 71, the second pressing plate 72 and the moving mechanism 73 are omitted in the embodiment.

[0131] In the embodiment, Figure 20-23 In the embodiment, the first heating plate 751 comprises a pin hole 7510, which is in communication with the guide accommodating hole 740. The mold pressing equipment 1 further comprises a demolding mechanism 79 between the first heating plate 751 and the first pressing plate 71. The demolding mechanism 79 comprises a pin 791, which is used to pass through the pin hole 7510 to push the first mold core 741 in the guide accommodating hole 740 to move. In this way, after the lens 01 is processed, the first mold core 741 and the lens can be lifted by the pin 791, which facilitates the observation of the surface of the first mold core 741 and the lens 01, and facilitates the subsequent removal of the lens 01 from the first mold core 741. Moreover, in some embodiments, the second mold core 742 can also be lifted to a certain height at the same time, which facilitates the suction of the second mold core 742.

[0132] For example, Figure 23 In at least one direction perpendicular to the axis of the guide accommodating hole 740, the size of the pin hole 7510 is smaller than the size of the guide accommodating hole 740, so that the first mold core 741 in the guide accommodating hole 740 can also be limited by the first heating plate 751, that is, the first mold core 741 will not slide out of the opening close to the first heating plate 751.

[0133] Figure 24 A corresponding relationship diagram of the first heating plate 751 and the mold seat 74 provided by the embodiment of the present application, Figure 25 A corresponding relationship diagram of the pin 791, the first heating plate 751 and the mold seat 74 provided by the embodiment of the present application. Figure 25 Different from Figure 24 The difference between the embodiment and Figure 25 The pin 791 of the demolding mechanism is added in the embodiment.

[0134] In some embodiments, as shown in Figure 24 and Figure 25 The first heating plate 751 comprises a plurality of heating strips 7511, at this time, the pin hole 7510 can be a strip-shaped hole between the heating strips 7511 and the heating strips 7511, and one strip-shaped hole can simultaneously expose a plurality of guide accommodating holes 740, so that the pin 791 of the demolding mechanism 79 can be inserted into the guide accommodating hole 740.

[0135] For example, the plurality of heating strips 7511 can be uniformly arranged to provide uniform heating effect. In some embodiments, as shown inFigure 24 and Figure 25 As shown, they can be arranged symmetrically along the X direction.

[0136] For example, when the molding apparatus 1 also includes a demolding mechanism 79, the demolding mechanism 79 can be connected and fixed between the first heating plate 751 and the first pressure plate 71. Furthermore, in some other examples, holes for the ejector pin 791 to pass through can also be formed on the first pressure plate 71 (see the previous section on connecting holes for specific arrangements). In this case, the demolding mechanism 79 can also be located on the side of the first pressure plate 71 facing away from the first heating plate 751. This way, the demolding mechanism 79 does not need to bear significant pressure, reducing the design difficulty and cost of the demolding structure 79.

[0137] Figure 26 This is a structural diagram of another compression molding device provided in an embodiment of this application.

[0138] In some embodiments, see Figure 26 and combined Figure 10-11 As shown, the first loading and unloading mechanism 2 includes: a mold core control robot 21, a first loading robot 22, and a first unloading robot 23. The mold core control robot 21 is used to control the movement of the second mold core 742. For example, when the demolding mechanism 79 lifts the first mold core 741, the lens 01, and the second mold core 742 together, the suction cup of the mold core control robot 21 can be used to pick up and move the second mold core 742 to expose the lens 01.

[0139] Combination Figure 10-11 As shown, the first loading robot 22 is used to move the workpiece 00 to be processed in the preparatory station 10 to the molding equipment 1 when the workpiece 00 is at a first preset temperature value. The first unloading robot 23 is used to move the lens 01 to the cooling station 30 when the lens 01 in the molding equipment 1 cools to a second preset temperature value. For example, after the suction cup of the mold core control robot 21 picks up and moves the second mold core 742 to expose the lens 01, the suction cup of the first unloading robot 23 can be used to pick up and move the exposed lens 01 to the cooling station 30. At the same time, the suction cup of the first loading robot 22 can be used to pick up and move the workpiece 00 to be processed in the preparatory station 10 to the first mold core 741 in the guide receiving hole 740. In this embodiment, three robots can work together, which greatly improves the processing efficiency of the lens 01. The structure of each robot can be referred to in the previous description of the robots. For example, it can be an XYZ three-axis robot or a flexible arm mechanism, etc.

[0140] In some embodiments, return to reference Figure 16-18The die forming device 1 further comprises a second heating plate 752 and a fixing frame 70. The second heating plate 752 is located between the second die core 742 and the second pressing plate 72, so that the second die core 742 can be heated by the second heating plate 752, that is, the second die core 742 can transfer heat to the workpiece 01 while extruding the workpiece 01 with the first die core 741, thereby realizing high-temperature extrusion forming. The fixing frame 70 is connected with the second pressing plate 72, the second heating plate 752 is clamped between the fixing frame 70 and the second pressing plate 72, the second heating plate 752 has a containing space 780 between the fixing frame 70 and the second heating plate 752, the fixing frame 70 comprises a communication hole 781 which communicates with the containing space 780, the containing space 780 and the communication hole 781 are located on the side of the second heating plate 752 away from the second pressing plate 72, and the containing space 780 and the communication hole 781 are sequentially away from the second heating plate 752. The second die core 742 comprises a head portion 7421 and a rod portion 7422, the head portion 7421 is limited in the containing space 780, the rod portion 7422 is connected with the head portion 7421, and the rod portion 7422 passes through the communication hole 781. In the embodiment, since the fixing frame 70 can relatively fix the second heating plate 752 and the second pressing plate 72, and can limit the head portion 7421 of the second die core 742 in the containing space 780 between the second heating plate 752 and the fixing frame 70, the second heating plate 752 and the second die core 742 can move together during the movement of the second pressing plate 72, so it is not necessary to set the die core control mechanical hand 21 to move the second die core 742.

[0141] For example, referring to Figure 16The fixing frame 70 includes a mounting frame 78 and a connecting frame 77 connecting the mounting frame 78 and the second pressing plate 72. The mounting frame 78 abuts against the surface of the second heating plate 752 away from the second pressing plate 72; a containing space 780 is located between the mounting frame 78 and the second heating plate 752, and a communication hole 781 is located in the mounting frame 78. In the example, the fixing frame 70 is divided into two parts to facilitate installation, disassembly and maintenance. In some examples, the connecting frame 77 includes a connecting block 770, a first connecting piece 771 and a second connecting piece 772, the first connecting piece 771 connects the connecting block 770 and the second pressing plate 72, the second connecting piece 772 connects the connecting block 770 and the opposite surface of the mounting frame 78 in the first direction, the connecting block 770 has a gap with the opposite surface of the mounting frame 78 in the first direction, and the first direction is the stacking direction of the second heating plate 752 and the second pressing plate 72, i.e. the Z direction. In the example, the first connecting piece 771 and the second connecting piece 772 can be used to fix the fixing frame 70 more conveniently. The first connecting piece 771 and the second connecting piece 772 can be bolts, and the gap between the connecting block 770 and the opposite surface of the mounting frame 78 in the first direction can play a good fastening role while the bolts are fixed, so that the bolts are not easily tightened, and the connecting block 770 and the mounting frame 78 are not easily in contact with the second heating plate 752 without clamping, thereby improving the reliability.

[0142] For example, the thermal expansion coefficient of the hole wall of the communication hole 781 is greater than the thermal expansion coefficient of the rod portion 7422. In the example, the gap between the rod portion 7422 and the communication hole 781 of the molding device 1 is small or non-existent when the molding device 1 is heated before molding, and when the molding device 1 is heated during molding, the rod portion 7422 has a certain degree of automatic correction effect during contact with the workpiece 00 because the thermal expansion coefficient of the hole wall of the communication hole 781 is greater than the thermal expansion coefficient of the rod portion 7422, that is, the rod portion 7422 avoids an inclined pressing process due to the lack of movement allowance between the communication hole 781 and the rod portion 7422 during the pressing process, thereby improving the processing quality of the lens 01.

[0143] Exemplarily, the stacking direction of the second heating plate 752 and the second pressing plate 72 is the first direction (i.e., the Y direction); the axis of the communication hole 781 is parallel to the first direction. The distance of the accommodation space 780 along the first direction is greater than the distance of the head portion 7421 along the first direction. In the present example, by setting the distance of the accommodation space 780 along the first direction to be greater than the distance of the head portion 7421 along the first direction, the head portion 7421 has a certain amount of movement during the pressing process, which can also avoid damage to the lens caused by the rod portion 7422 continuously being in an inclined pressing process. In the present example, during the pressing of the second mold core 742, the change in the aperture of the communication hole 781 and the gradual contact between the second heating plate 752 and the head portion 7421 can achieve a good automatic straightening effect of the rod portion 7422, thereby improving the processing quality of the lens 01.

[0144] Figure 27 A detection schematic diagram of an image detection device provided by an embodiment of the present application, Figure 28 A detection schematic diagram of another image detection device provided by an embodiment of the present application, Figure 29 A detection schematic diagram of still another image detection device provided by an embodiment of the present application.

[0145] In some embodiments, in combination with Figure 26-29 As shown, the lens mold forming system 100 can further include an image detection device 60 and a heat insulation structure 50, the image detection device 60 is located in the heat insulation structure 50, and the image detection device 60 is used to detect at least part of the mold forming device 1 and / or the lens 01 through the transparent heat insulation window 501 of the heat insulation structure 50. In the present embodiment, the image detection device 60 can be, for example, a charge coupled device (CCD) camera or other device with image detection function. The image detection device 60 is located in the heat insulation structure 50, so it can realize image detection function under high temperature (for example, 300-700°C) condition and is not easy to be damaged by high temperature. Here, "at least part of the mold forming device" can include, for example, the first mold core 741, the second mold core 742, the mold seat 74 and other structures, and through image detection, it can be determined whether the first mold core 741, the second mold core 742, the mold seat 74 and other structures have surface residues, damage, and the surface quality of the lens, etc.

[0146] Exemplarily, as Figure 28As shown, the lens mold forming system 100 can further include a fixed adjustment structure 40, and the image detecting device 60 and the heat insulation structure 50 can be mounted on the movable end of the fixed adjustment structure 40. In this way, the fixed adjustment structure 40 can be used to move the image detecting device 60 and the heat insulation structure 50, so that the image detecting device 60 can be used to detect the at least part of the mold forming device 1 and / or the lens 01 from more angles, improving the accuracy and reliability of the detection function.

[0147] The following provides specific examples of four fixed adjustment structures.

[0148] Fixed adjustment structure example one: the fixed adjustment structure 40 includes a first moving mechanism for driving the image detecting device 60 to move in a first direction, which is parallel to the axis of the guide accommodating hole 740. In this example, after the second mold core 742 and the second pressing plate 72 and the second heating plate 752 are moved away, the first moving mechanism can drive the image detecting device 60 to move from top to bottom above the first mold core 741 and the lens 01, so as to detect the first mold core 741 and the lens 01.

[0149] Fixed adjustment structure example two: the fixed adjustment structure 40 includes a second moving mechanism for driving the image detecting device 60 to move in a plane perpendicular to the first direction, which is parallel to the axis of the guide accommodating hole 740. In this example, after the second mold core 742 and the second pressing plate 72 and the second heating plate 752 are moved away, the second moving mechanism can drive the image detecting device 60 to move in a plane perpendicular to the first direction, so that the image detecting device 60 can be moved to above the first mold core 741 and the lens 01, so as to detect the first mold core 741, the second mold core 742 and the lens 01.

[0150] Fixed adjustment structure example three: the fixed adjustment structure 40 includes a first moving mechanism and a second moving mechanism. In this example, the first moving mechanism can be used to drive the image detecting device 60 to move in the first direction, and the second moving mechanism can be used to drive the image detecting device 60 to move in a plane perpendicular to the first direction, so as to achieve more comprehensive detection.

[0151] Fixed adjustment structure example four: the fixed adjustment structure 40 includes a flexible arm mechanism for driving the image detecting device 60 to move in multiple directions. In this example, by providing the flexible arm mechanism, the image detecting device 60 can be better moved, so that the first mold core 741, the second mold core 742 and the lens 01 can be detected from more angles and distances, and the detection results are more comprehensive and reliable.

[0152] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A lens mold forming system, characterized by: The system comprises a preparation station, a molding station and a cooling station; the molding station comprises a molding device and a first feeding and discharging mechanism, the first feeding and discharging mechanism is used for moving the workpiece in the preparation station to the molding device when the workpiece in the preparation station is at a first preset temperature value, the molding device is used for processing the workpiece into a lens, and the first feeding and discharging mechanism is also used for moving the lens in the molding device to the cooling station when the lens in the molding device cools to a second preset temperature value; wherein the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material; The molding device comprises: a first pressing plate and a second pressing plate arranged oppositely; a movement mechanism connected to the first pressing plate and the second pressing plate, the movement mechanism being used for controlling the distance between the first pressing plate and the second pressing plate; a die seat located between the first pressing plate and the second pressing plate, the die seat comprising a guide accommodating hole; a first die core located in the guide accommodating hole; a second die core located between the die seat and the second pressing plate, the second die core being used for cooperating with the first die core to extrude the workpiece into the lens in the guide accommodating hole; a first heating plate located between the die seat and the first pressing plate; a second heating plate located between the second die core and the second pressing plate.

2. The lens mold forming system of claim 1, wherein, The movement mechanism comprises a telescopic rod, one end of the telescopic rod being connected to the first pressing plate, and the other end of the telescopic rod being connected to the second pressing plate.

3. The lens mold forming system of claim 1, wherein, The molding device further comprises: a die seat fixing member connected to the first heating plate, and the die seat fixing member comprising a clamping jaw abutting against the surface of the edge of the die seat away from the first heating plate.

4. The lens molding system according to claim 1, wherein the first heating plate comprises a ejector pin hole in communication with the guide accommodating hole; the molding device further comprises an ejecting mechanism located between the first heating plate and the first pressing plate, and the ejecting mechanism comprises an ejector pin used for pushing the first die core in the guide accommodating hole to move.

5. The lens mold forming system of claim 1, wherein, The first feeding and discharging mechanism comprises: a die core control manipulator used for controlling the movement of the second die core; a first feeding manipulator used for moving the workpiece in the preparation station to the molding device when the workpiece in the preparation station is at the first preset temperature value, and a first discharging manipulator used for moving the lens in the molding device to the cooling station when the lens in the molding device cools to the second preset temperature value.

6. The lens mold forming system of any of claims 1-5, wherein, The molding device further comprises: A fixing frame is connected with the second pressing plate; the second heating plate is clamped between the fixing frame and the second pressing plate, and a containing space is formed between the second heating plate and the fixing frame; the fixing frame comprises a communicating hole which communicates with the containing space; the containing space and the communicating hole are located on the side of the heating plate which is away from the second pressing plate and are sequentially away from the heating plate; The second mold core comprises a head portion and a rod portion; the head portion is limited in the containing space; the rod portion is connected with the head portion and passes through the communicating hole.

7. The lens mold forming system of claim 6, wherein, The fixing frame further comprises: A mounting frame and a connecting frame; the connecting frame connects the mounting frame and the second pressing plate; the mounting frame abuts against the surface of the second heating plate which is away from the second pressing plate; the containing space is located between the mounting frame and the second heating plate; the communicating hole is located on the mounting frame.

8. The lens mold forming system of claim 7, wherein, The connecting frame comprises a connecting block, a first connecting member and a second connecting member; the first connecting member connects the connecting block and the second pressing plate; the second connecting member connects the connecting block and the opposite surface of the mounting frame along the first direction; a gap is formed between the connecting block and the opposite surface of the mounting frame along the first direction; the first direction is the stacking direction of the second heating plate and the second pressing plate.

9. The lens mold press forming system according to claim 6, wherein The thermal expansion coefficient of the hole wall of the communicating hole is greater than the thermal expansion coefficient of the rod portion.

10. The lens mold press forming system according to claim 6, wherein The stacking direction of the second heating plate and the second pressing plate is the first direction; the axis of the communicating hole is parallel to the first direction; the distance of the containing space along the first direction is greater than the distance of the head portion along the first direction. Further comprising:

11. The lens mold forming system of any of claims 1-5, wherein, An image detection device and a heat insulation structure; the image detection device is located in the heat insulation structure; the image detection device is used for detecting at least part of the mold press forming equipment and / or the lens through the transparent heat insulation window of the heat insulation structure. Further comprising:

12. The lens mold forming system of claim 11, wherein, A fixed adjustment structure; the image detection device and the heat insulation structure are installed on the movable end of the fixed adjustment structure. The fixed adjustment structure comprises a first moving mechanism and / or a second moving mechanism; the first moving mechanism is used for driving the image detection device to move along the first direction; the second moving mechanism is used for driving the image detection device to move in the plane which is perpendicular to the first direction; the first direction is parallel to the axis of the guiding containing hole; 13. The lens mold forming system of claim 12, wherein, Alternatively, the fixed adjustment structure comprises a flexible arm mechanism; the flexible arm mechanism is used for driving the image detection device to move along multiple angles. The number of the guiding containing hole, the first mold core and the second mold core is multiple and one-to-one correspondence.

14. The lens mold forming system of any one of claims 1-5, wherein, The preparation station comprises:

15. The lens mold forming system of any one of claims 1-5, wherein, Multiple independent temperature rising chambers; the last temperature rising chamber is used for providing the to-be-processed piece to the first up-and-down feeding mechanism; A first conveying mechanism is used for conveying the to-be-processed piece to sequentially pass through the multiple independent temperature rising chambers. ​ A second feeding manipulator is configured to place a glass preform into the first-stage chamber, the glass preform being the workpiece.

16. The lens mold forming system of any one of claims 1-5, wherein, The preparation station comprises: a plurality of independent first cooling chambers, the last-stage first cooling chamber being configured to provide the first feeding and discharging mechanism with the workpiece; a second conveying mechanism configured to convey the workpiece through the plurality of independent first cooling chambers one by one; a melting and extruding device configured to extrude a glass raw material into the workpiece and place the workpiece in the first-stage first cooling chamber.

17. The lens mold forming system of any one of claims 1-5, wherein, The cooling station comprises: a plurality of independent second cooling chambers, the first-stage second cooling chamber being configured to receive the lens taken out of the mold forming device by the first feeding and discharging mechanism; a third conveying mechanism configured to convey the lens through the plurality of independent second cooling chambers one by one; a second discharging manipulator configured to take out the lens when the lens is conveyed to the last-stage second cooling chamber.

18. A lens mold forming method characterized by, The method comprises: moving the workpiece to the mold forming device when the workpiece is at a first preset temperature value; processing the workpiece into a lens by using the mold forming device; taking out the lens from the mold forming device when the lens in the mold forming device is cooled to a second preset temperature value; wherein the first preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material, and / or the second preset temperature value is less than or equal to the lower limit of the high-elasticity temperature range of the glass material.

19. The lens mold forming method of claim 18, wherein: an absolute value of a difference between the first preset temperature value and the lower limit of the high-elasticity temperature range of the glass material is less than or equal to 100℃, and an absolute value of a difference between the second preset temperature value and the lower limit of the high-elasticity temperature range of the glass material is less than or equal to 100℃.

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