Liquid introduction method, liquid introduction mechanism, and liquid introduction apparatus

Abstract

The application provides a liquid introduction method for introducing liquid to a workpiece, comprising: controlling a movement of an introduction assembly to a first direction to introduce liquid to the workpiece; monitoring an introduction parameter of the liquid introduced to the workpiece to reach a preset parameter; generating a liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter; and controlling the movement of the introduction assembly to a second direction based on the liquid suction instruction to suck at least part of the liquid to avoid the liquid overflowing from the surface of the workpiece, facilitate the demolding of the liquid after being solidified in the workpiece, and prevent the liquid from being deformed or broken after being solidified, thereby improving the production yield and saving the liquid use cost. The application also provides a liquid introduction mechanism and a liquid introduction device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of introducing liquid into a workpiece, and in particular to a liquid introduction method, a liquid introduction mechanism and a liquid introduction device. BACKGROUND

[0002] Currently, when a workpiece needs to be sealed by glue or bonded with other components, a glue filling device is usually used to fill glue into the workpiece so that the glue is solidified and formed in the workpiece. Figure 1 As shown in FIG. 1, after the glue filling device fills glue into the workpiece 200, part of the glue 400 is prone to overflow from the glue overflow port 202 of the workpiece 200, resulting in waste of the source material, and the overflowed glue 400 is not easy to be demolded from the workpiece 200 after solidification, which leads to the deformation or fracture of the solidified glue 400, thereby affecting the production yield. SUMMARY

[0003] In view of the above, it is necessary to provide a liquid introduction method, a liquid introduction mechanism and a liquid introduction device to avoid glue overflow from the workpiece, so that the glue is easy to be demolded from the workpiece after solidification, and the production yield is improved.

[0004] The first aspect of the present application provides a liquid introduction method for introducing liquid into a workpiece, comprising: controlling a introduction assembly to move in a first direction to introduce the liquid into the workpiece; monitoring an introduction parameter of the liquid into the workpiece to reach a preset parameter; generating a liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter; and controlling the introduction assembly to move in a second direction based on the liquid suction instruction to suction at least part of the liquid.

[0005] In some embodiments, it further comprises: monitoring a vacuum environment in which the workpiece is located to reach a preset vacuum value; and generating the liquid introduction instruction to trigger the execution of the step of "controlling the introduction assembly to move in the first direction" based on the vacuum environment in which the workpiece is located reaching the preset vacuum value.

[0006] In some embodiments, the step of generating the liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter comprises: stopping the introduction assembly from moving in the first direction based on the introduction parameter of the liquid reaching the preset parameter; monitoring a first stop time of the introduction assembly based on the stopping of the introduction assembly from moving in the first direction; and determining that the first stop time reaches a first preset time to generate the liquid suction instruction.

[0007] In some embodiments, the determining that the first stop time reaches the first preset time, and generating the liquid back-sucking instruction, comprises: determining that the first stop time reaches the first preset time, and monitoring that the air pressure environment where the workpiece is located reaches a preset air pressure value; and based on the air pressure environment where the workpiece is located reaching the preset air pressure value, generating the liquid back-sucking instruction.

[0008] In some embodiments, the liquid introduction method further comprises: monitoring a motion parameter of the introduction assembly moving in the second direction reaching a preset motion parameter; based on the motion parameter of the introduction assembly moving in the second direction reaching the preset motion parameter, stopping the introduction assembly from moving in the second direction; based on stopping the introduction assembly from moving in the second direction, monitoring a second stop time of the introduction assembly; determining that the second stop time reaches a second preset time, to generate a command for the introduction assembly to move away from the workpiece; and based on the command for the introduction assembly to move away from the workpiece, controlling the introduction assembly to move away from the workpiece.

[0009] In some embodiments, the liquid introduction method further comprises: based on the command for the introduction assembly to move away from the workpiece, controlling the introduction assembly to move to a liquid recovery device; and based on the introduction assembly moving to the liquid recovery device, controlling a blowing assembly to blow air to the introduction assembly, to blow the liquid on the outer surface of the introduction assembly into the liquid recovery device.

[0010] In some embodiments, the liquid introduction method further comprises: based on the command for the introduction assembly to move away from the workpiece, controlling the introduction assembly to move to a liquid recovery device; and based on the introduction assembly moving to the liquid recovery device, controlling the introduction assembly to move in the first direction, to introduce the liquid in the introduction assembly into the liquid recovery device.

[0011] In some embodiments, the liquid comprises a first liquid and a second liquid; and the liquid introduction method further comprises: causing the introduction assembly to flow into the first liquid and the second liquid.

[0012] In some embodiments, the liquid introduction method further comprises: causing the introduction assembly to flow into the first liquid, and stopping the flow into the second liquid.

[0013] In some embodiments, the method further comprises: determining that the introduction assembly is connected to the workpiece; and based on the introduction assembly being connected to the workpiece, generating the liquid introduction instruction to trigger the execution of the step of “controlling the introduction assembly to move in the first direction”.

[0014] The second aspect of the present application provides a liquid introduction mechanism for introducing a liquid to a workpiece, comprising an introduction assembly and a processor electrically connected to the introduction assembly, the processor being configured to: control the introduction assembly to move in a first direction to introduce the liquid to the workpiece; monitor an introduction parameter of the liquid introduced to the workpiece to reach a preset parameter; generate a liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter; and control the introduction assembly to move in a second direction based on the liquid suction instruction to suction at least part of the liquid.

[0015] In some embodiments, the introduction assembly comprises: a barrel configured to be fluidly connected to a liquid source; a driving member arranged in the barrel and electrically connected to the processor; and a transmission member connected to the driving member, the driving member driving the transmission member to move in the first direction to introduce the liquid to the workpiece, and the driving member driving the transmission member to move in the second direction to suction at least part of the liquid.

[0016] The third aspect of the present application provides a liquid introduction device for introducing a liquid to a workpiece, comprising the liquid introduction mechanism as described above; and a feeding mechanism configured to transport the workpiece to the liquid introduction mechanism.

[0017] The liquid introduction method, the liquid introduction mechanism and the liquid introduction device described above can avoid overflow of the liquid from the surface of the workpiece by controlling the introduction assembly to move in the first direction based on the liquid introduction instruction to introduce the liquid to the workpiece, generating the liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter, and controlling the introduction assembly to move in the second direction based on the liquid suction instruction to suction at least part of the liquid, which facilitates demolding of the workpiece after the liquid is solidified in the workpiece, and prevents the liquid from being deformed or broken after being solidified, thereby improving production yield and saving liquid use cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of a state of overflow of a liquid provided by the prior art.

[0019] Figure 2a FIG. 4 is a schematic diagram of a part of a flow of a liquid introduction method provided by an embodiment of the present application.

[0020] Figure 2b FIG. 5 is another schematic diagram of a part of a flow of a liquid introduction method provided by an embodiment of the present application.

[0021] Figure 3 FIG. 6 is a schematic diagram of a three-dimensional structure of a liquid introduction device provided by an embodiment of the present application.

[0022] Figure 4 FIG. 7 is a schematic diagram of a state of a liquid in a workpiece provided by an embodiment of the present application.

[0023] Figure 5 is Figure 3 An exploded structural schematic view of the frame, the introduction assembly, and the cover.

[0024] Figure 6 is Figure 2a A flow schematic view of step S02.

[0025] Figure 7 is Figure 2a A flow schematic view of step S08.

[0026] Figure 8 A hardware architecture schematic view of the liquid introduction mechanism provided by the embodiments of the present application.

[0027] Figure 9 is Figure 3 A cross-sectional schematic view of the introduction assembly along IX-IX.

[0028] Explanation of main element symbols

[0029] Liquid introduction device 100

[0030] Workbench 10

[0031] Cavity 20

[0032] Window 21

[0033] First opening 22

[0034] Second opening 23

[0035] Transfer device 30

[0036] First driving assembly 31

[0037] Second driving assembly 32

[0038] Third driving assembly 33

[0039] Frame 34

[0040] Introduction assembly 40

[0041] Introduction needle 41

[0042] Glue discharging member 42

[0043] Barrel 43

[0044] Driving member 44

[0045] Transmission member 45

[0046] Liquid recovery device 50

[0047] Cover 60

[0048] workpiece 200

[0049] liquid inlet 201

[0050] glue overflow port 202

[0051] liquid introduction mechanism 300

[0052] processor 310

[0053] glue 400

[0054] liquid 500

[0055] distance gap 600 DETAILED DESCRIPTION

[0056] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0058] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other, it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In this application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal thickness of the first feature is higher than that of the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal thickness of the first feature is less than that of the second feature.

[0060] The following disclosure provides many different embodiments or examples for implementing different structures of the application. For the purpose of simplification, the components and arrangements of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the application. In addition, the application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0061] Embodiments of the application provide a liquid introduction method for introducing a liquid to a workpiece, comprising: controlling an introduction assembly to move in a first direction to introduce the liquid to the workpiece; monitoring an introduction parameter of the liquid introduced to the workpiece to reach a preset parameter; generating a liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter; and controlling the introduction assembly to move in a second direction based on the liquid suction instruction to suction at least part of the liquid.

[0062] Embodiments of the application also provide a liquid introduction mechanism for introducing a liquid to a workpiece, comprising an introduction assembly and a processor electrically connected to the introduction assembly, the processor being configured to: control the introduction assembly to move in a first direction to introduce the liquid to the workpiece; monitor an introduction parameter of the liquid introduced to the workpiece to reach a preset parameter; generate a liquid suction instruction based on the introduction parameter of the liquid reaching the preset parameter; and control the introduction assembly to move in a second direction based on the liquid suction instruction to suction at least part of the liquid.

[0063] Embodiments of the application also provide a liquid introduction device for introducing a liquid to a workpiece, comprising a liquid introduction mechanism as described above; and a feeding mechanism configured to transport the workpiece to the liquid introduction mechanism.

[0064] The liquid introduction method, the liquid introduction mechanism and the liquid introduction device provided by the embodiments of the present application can control the introduction assembly to move in the first direction based on the liquid introduction instruction, so as to introduce the liquid to the workpiece; generate the liquid suction instruction based on the liquid introduction parameter reaching the preset parameter; and control the introduction assembly to move in the second direction based on the liquid suction instruction, so as to suck at least part of the liquid, avoid the liquid overflowing from the surface of the workpiece, facilitate the demolding of the liquid after the liquid is solidified in the workpiece, and prevent the liquid from being deformed or broken after being solidified, thereby improving the production yield and saving the liquid use cost.

[0065] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. Please refer to Figure 2a and Figure 2b The embodiments of the present application provide a flowchart of a liquid introduction method, which is used to introduce liquid 500 (please refer to Figure 3 ) to a workpiece 200 (please refer to Figure 4 ). The workpiece 200 can be a mold or a mold with a product installed, and the liquid 500 can be an adhesive, which can be glue. The glue can be a single type of glue or a mixed glue formed by mixing multiple types of glue. For the convenience of understanding, the embodiments of the present application will be described by taking the workpiece 200 as a mold with a product installed, as shown in Figure 4 . The mold has a forming cavity, and the mold forms a forming cavity for introducing the liquid 500 after the cavity is opened. The product can be a separate product, and the liquid 500 is formed on the product after the liquid 500 is introduced into the mold by using the liquid introduction method provided by the embodiments of the present application, so as to improve the sealing performance of the product. In another embodiment, the product can also be two separate components, and the two separate components can be bonded together after the liquid 500 is introduced into the mold by using the liquid introduction method provided by the embodiments of the present application. The liquid introduction method provided by the embodiments of the present application can prevent the liquid 500 from overflowing from the glue overflow port 202 of the mold. According to different requirements, the order of the steps in the flowchart to be described below can be changed, and some steps can be omitted. For the convenience of description, only the parts related to some embodiments of the present application are shown. The liquid introduction method includes the following steps S02-S10.

[0066] Step S02, generating a liquid introduction instruction.

[0067] Specifically, in step S02, the liquid introduction instruction can be understood as an instruction to move the introduction assembly 40 in the first direction to make the liquid flow out. The introduction instruction can be triggered by the user pressing the start switch, or triggered when the position sensor senses that the displacement of the introduction assembly 40 reaches the predetermined position of the inserted workpiece 200, or triggered when the sensor senses that the cavity 20 is in a vacuum environment. The main purpose of the liquid introduction instruction generated in this embodiment is to trigger the execution of step S04 (to be described below).

[0068] Referring to Figure 3 , some embodiments of the present application also provide a liquid introduction device 100. The liquid introduction method can be implemented by the liquid introduction device 100 provided by the embodiments of the present application. Obviously, the liquid introduction method provided by the embodiments of the present application can also be implemented by other introduction devices, which are not limited by the embodiments of the present application. In the embodiments of the present application, the liquid introduction device 100 includes a workbench 10, a feeding mechanism, and an introduction mechanism 300 (see Figure 8 ), the introduction mechanism 300 includes a cavity 20 and an introduction assembly 40. The feeding mechanism includes a conveying belt (not shown in the figure), a robot (not shown in the figure), and a transfer device 30, the conveying belt is used to convey the workpiece 200, and the robot places the workpiece 200 on the conveying belt into the cavity 20.

[0069] The cavity 20 is used to accommodate the workpiece 200. The transfer device 30 is arranged on the workbench 10 and is connected to the introduction assembly 40 and the cavity 20. The introduction assembly 40 includes an introduction needle 41 (see Figure 5 ), which is used to connect the workpiece 200 to introduce the liquid 500 into the workpiece 200. In an embodiment, after the workpiece 200 is placed in the cavity 20, the transfer device 30 is controlled to move the introduction assembly 40 and the cavity 20 relatively to connect the introduction needle 41 of the introduction assembly 40 with the workpiece 200, and the introduction assembly 40 is controlled to introduce the liquid 500 into the workpiece 200 through the introduction needle 41. Wherein, the introduction assembly 40 moves in the first direction to make the liquid 500 flow out, and the introduction assembly 40 moves in the second direction to suck back the liquid 500. In an embodiment, the transfer device 30 can include a first driving assembly 31, a second driving assembly 32, a third driving assembly 33, and a frame 34. The first driving assembly 31 is arranged on the workbench 10, and is used to drive the cavity 20 to move along the X-axis direction as shown in Figure 3 , the second driving assembly 32 is arranged on the workbench 10, the third driving assembly 33 is arranged on the second driving assembly 32, the frame 34 is arranged on the third driving assembly 33, and the introduction assembly 40 is connected with the frame 34. The second driving assembly 32 is used to drive the third driving assembly 33 to move along the Y-axis direction as shown in Figure 3 . The third driving assembly 33 is used to drive the frame 34 to move along the Z-axis direction as shown in Figure 3The Z-axis direction movement is shown. In this way, by setting the first driving assembly 31 to drive the cavity 20 to move, the workpiece 200 can be placed in the cavity 20 by the operator or the mechanical hand, and the workpiece 200 can be taken out of the cavity 20; by setting the second driving assembly 32 and the third driving assembly 33, the guide-in needle 41 can be inserted with the workpiece 200 in the cavity 20; by setting the frame 34, the guide-in assembly 40 can be stably connected with the transfer device 30. Obviously, the transfer device 30 can also be a robot or other mechanism that can drive the guide-in assembly 40 and the cavity 20 to move relatively. Among them, the insertion of the guide-in needle 41 with the workpiece 200 can also be understood as the connection of the guide-in needle 41 with the workpiece 200.

[0070] The first direction and the second direction can be opposite directions. Specifically, in an embodiment, the first direction and the second direction can be respectively in the direction of moving towards the workpiece 200 and the direction of moving away from the workpiece 200 along the Z-axis direction as shown. Figure 3 In another embodiment, the first direction and the second direction can be understood as the counterclockwise movement direction and the clockwise movement direction around the Z-axis direction as shown. Figure 3 In the following introduction, the first direction and the second direction are respectively the R direction and the L direction shown in Figure 3 Please refer to Figure 2a and Figure 2b In some embodiments, the liquid guide-in method further includes the following steps S012-S014 before performing step S02, to ensure that the guide-in assembly 40 can smoothly guide the liquid 500 into the workpiece 200.

[0071] Step S012, determine whether the guide-in assembly 40 is inserted with the workpiece 200.

[0072] Specifically, the distance between the guide-in needle 41 and the workpiece 200 can be sensed by a proximity sensor or a photoelectric sensor, so as to determine whether the guide-in needle 41 of the guide-in assembly 40 is accurately inserted with the workpiece 200. The proximity sensor or the photoelectric sensor can be arranged on the guide-in assembly 40 and / or the cavity 20.

[0073] Step S014, based on the insertion of the guide-in assembly 40 with the workpiece 200, generate a liquid guide-in instruction.

[0074] Specifically, based on the accurate insertion of the guide-in needle 41 of the guide-in assembly 40 with the workpiece 200, the liquid guide-in instruction is generated. In this way, the liquid guide-in method can smoothly guide the liquid 500 into the workpiece 200 by performing steps S012-S014, avoiding generating the liquid guide-in instruction in the case of inaccurate insertion of the guide-in assembly 40 with the workpiece 200, and making the guide-in assembly 40 guide the liquid 500 into the surface or other parts of the workpiece 200.

[0075] In some embodiments, referring to Figure 3 The cavity 20 is provided with a window 21 made of a material with light transmission, such as glass, acrylic, etc. In this way, by providing the window 21 on the cavity 20, it is convenient to observe whether the lead-in needle 41 in the cavity 20 has been accurately inserted into the workpiece 200. At the same time, it can also be analyzed and determined by the operator or an industrial camera whether the lead-in needle 41 in the cavity 20 has been accurately inserted into the workpiece 200.

[0076] Referring to Figure 2a and Figure 2b , step S04, based on the liquid lead-in instruction, the lead-in assembly 40 is controlled to move in the first direction to lead the liquid 500 into the workpiece 200.

[0077] Specifically, after the liquid lead-in instruction is generated, the lead-in assembly 40 is controlled to move in the first direction so that the liquid 500 flows out of the lead-in assembly 40 and is led into the workpiece 200 through the lead-in needle 41.

[0078] Step S06, monitoring the lead-in parameter of the liquid 500 into the workpiece 200 reaching a preset parameter.

[0079] Specifically, the lead-in parameter can be the lead-in time of the liquid 500, the lead-in volume of the liquid 500, etc. The lead-in volume is usually greater than the volume of the liquid 500 that can be contained in the workpiece 200, so that the liquid 500 can be fully filled into the workpiece 200. In the embodiment of the application, when the lead-in assembly 40 is controlled to move in the first direction, the lead-in assembly 40 discharges the liquid 500 at a first preset flow rate, and the lead-in parameter can be the lead-in time, that is, step S06 can be understood as monitoring the lead-in time of the liquid 500 into the workpiece 200 reaching a first preset time. For example, the first preset flow rate is 20 ml / s, the lead-in volume of the liquid 500 is 400 ml, and the first preset time is 20 s. Obviously, the first preset flow rate can also be 10 ml / s, 40 ml / s, etc., and the first preset time is 40 s, 10 s, etc.

[0080] Step S08, based on the lead-in parameter of the liquid 500 reaching a preset parameter, generating a liquid suction instruction.

[0081] Specifically, when the lead-in parameter of the liquid 500 reaches the preset parameter, for example, when the lead-in time of the liquid 500 reaches the first preset time, an instruction is generated to control the lead-in assembly 40 to move in the second direction, so that the lead-in assembly 40 can suck the liquid 500.

[0082] It should be noted that when the control unit controls the introducing assembly 40 to move in the first direction to introduce the liquid 500 into the workpiece 200, the liquid 500 is prevented from overflowing from the surface of the workpiece 200 by sucking back part of the liquid 500, so that the positive pressure formed when the liquid 500 is introduced into the forming cavity of the workpiece 200 does not cause part of the liquid 500 to overflow from the surface of the workpiece 200.

[0083] In step S10, the control unit controls the introducing assembly 40 to move in the second direction to suck back at least part of the liquid 500 based on the liquid sucking back instruction.

[0084] Specifically, based on the generated liquid sucking back instruction, the control unit controls the introducing assembly 40 to move in the second direction to suck back the liquid 500 by using the negative pressure generated by the reverse movement. After the introducing assembly 40 sucks back the liquid 500, a distance gap 600 is temporarily formed between the liquid 500 in the introducing assembly 40 and the liquid 500 in the workpiece 200, and due to the sucking back of the introducing assembly 40, the introducing assembly 40 generates a relative negative pressure on the liquid 500 in the workpiece 200, so that the liquid 500 in the workpiece 200 flows in the direction of the distance gap 600 with a smaller pressure and further flows into the introducing assembly 40, thereby preventing the liquid 500 from overflowing from the liquid inlet 201, the overflow port 202 or other parts of the workpiece 200. In this way, the liquid introducing method can effectively prevent the liquid 500 from overflowing from the surface of the workpiece 200 by performing steps S012-S10 or steps S02-S10, and can ensure that the liquid level of the liquid 500 in the forming cavity is not higher than the liquid inlet 201 and / or the overflow port 202, so that the liquid 500 in the forming cavity is easy to demold after solidification, and further prevents the liquid 500 from being deformed or broken after solidification, thereby improving the production yield. Optionally, the distance between the liquid level of the liquid 500 in the forming cavity and the liquid inlet 201 and / or the overflow port 202 after the introducing assembly 40 moves in the second direction to suck back at least part of the liquid 500 is 1-30 mm. Considering that the liquid 500 may expand during solidification in the forming cavity, the distance between the liquid level of the liquid 500 in the forming cavity and the liquid inlet 201 and / or the overflow port 202 after the introducing assembly 40 moves in the second direction to suck back part of the liquid 500 is 10 mm.

[0085] In an embodiment, the flow rate of the introducing assembly 40 moving in the second direction to suck back the liquid 500 is greater than the flow rate of the introducing assembly 40 moving in the first direction to introduce the liquid 500. For example, the flow rate of the introducing assembly 40 moving in the first direction to introduce the liquid 500 is 20 ml / s, and the flow rate of the introducing assembly 40 moving in the second direction to suck back the liquid 500 can be 10-60 ml / s. Obviously, this is not a limitation of the embodiments of the present application.

[0086] Please continue to refer to Figure 2a and Figure 2b In some embodiments, the liquid introducing method further includes steps S12-S20.

[0087] Step S12, monitoring the motion parameter of the motion of the introduction assembly 40 to the second direction reaching the preset motion parameter.

[0088] Specifically, the motion parameter of the motion of the introduction assembly 40 to the second direction can be the motion time, the back suction amount, etc. The back suction amount is the amount of liquid 500 that needs to be back suctioned according to the difference between the introduction capacity of the liquid 500 and the capacity of the liquid 500 that the workpiece 200 can accommodate. In the embodiment of the present application, when the introduction assembly 40 is controlled to move to the second direction, the introduction assembly 40 back suctions the liquid 500 at the second preset flow rate, and the motion parameter can be the motion time, that is, step S12 can be understood as monitoring the motion time of the motion of the introduction assembly 40 to the second direction reaching the second preset time. For example, the second preset flow rate is 60 ml / s, and the second preset time is determined to be 2 s according to the difference between the introduction capacity of the liquid 500 and the capacity of the liquid 500 that the workpiece 200 can accommodate. Obviously, the preset flow rate can also be 40 ml / s, 60 ml / s, etc., and the second preset time can be 3 s, 2 s, etc.

[0089] Step S14, based on the motion parameter of the motion of the introduction assembly 40 to the second direction reaching the preset motion parameter, stopping the motion of the introduction assembly 40 to the second direction.

[0090] Specifically, based on the motion time of the motion of the introduction assembly 40 to the second direction reaching the second preset time, the introduction assembly 40 is controlled to stop moving, and the introduction needle 41 of the introduction assembly 40 is controlled to not move relative to the workpiece 200.

[0091] Step S16, based on stopping the motion of the introduction assembly 40 to the second direction, monitoring the second stop time of the introduction assembly 40.

[0092] Specifically, after the introduction assembly 40 is controlled to stop moving, the second stop time of the introduction needle 41 of the introduction assembly 40 not moving relative to the workpiece 200 is monitored. During the second stop time, the liquid 500 in the workpiece 200 flows to the introduction assembly 40, and based on the second stop time, the liquid 500 in the workpiece 200 and the liquid 500 in the introduction assembly 40 are relatively balanced, and the liquid 500 in the workpiece 200 no longer flows, and the liquid 500 in the workpiece 200 no longer overflows.

[0093] Step S18, determining that the second stop time reaches the second preset time to generate an instruction for the introduction assembly 40 to move away from the workpiece 200.

[0094] Specifically, after the second stop time reaches the second preset time, the liquid 500 in the workpiece 200 no longer flows, and the workpiece 200 no longer overflows the liquid 500, and the liquid 500 is introduced into the workpiece 200, thereby generating a command for the second driving assembly 32 and the third driving assembly 33 of the transfer device 30 to drive the introduction assembly 40 away from the workpiece 200.

[0095] In step S20, based on the command for the introduction assembly 40 to move away from the workpiece 200, the introduction assembly 40 is controlled to move away from the workpiece 200.

[0096] Specifically, based on the generated command for the introduction assembly 40 to move away from the workpiece 200, the second driving assembly 32 and the third driving assembly 33 of the transfer device 30 are controlled to drive the introduction assembly 40 away from the workpiece 200 through the frame 34, and the first driving assembly 31 of the transfer device 30 is controlled to drive the cavity 20 to move, so as to facilitate unloading and reloading.

[0097] In this way, the liquid introduction method enables the liquid 500 to flow back into the introduction assembly 40 until the liquid 500 in the workpiece 200 no longer flows, and ensures that the workpiece 200 after the liquid 500 is introduced does not overflow the liquid 500 by performing steps S12-S20.

[0098] Please refer to Figure 2a and Figure 2b In some embodiments, the liquid introduction method further includes steps S22-S24.

[0099] In step S22, based on the command for the introduction assembly 40 to move away from the workpiece 200, the introduction assembly 40 is controlled to move to the liquid recovery device 50.

[0100] In some embodiments, please refer to Figure 3 , Figure 5 The introduction assembly 40 further includes a glue discharge member 42. The glue discharge member 42 is inserted into the frame 34, the glue discharge member 42 abuts against the liquid inlet 201 of the workpiece 200, and the introduction needle 41 passes through the glue discharge member 42 and is inserted into the liquid inlet 201 of the workpiece 200, so that when the introduction assembly 40 and the introduction needle 41 introduce the liquid 500 into the workpiece 200, the excess liquid 500 can overflow into the glue discharge member 42. The glue discharge member 42 is connected with the frame 34, and the glue discharge member 42 can move together with the introduction needle 41 and the frame 34.

[0101] Specifically, based on the command for the introduction assembly 40 to move away from the workpiece 200, the second driving assembly 32 and the third driving assembly 33 of the transfer device 30 are controlled to drive the introduction assembly 40 to move to the liquid recovery device 50 through the frame 34, and when the sensor detects that the introduction assembly 40 reaches the liquid recovery device 50, the introduction assembly 40 moves along the direction as indicated by the arrow A. Figure 3The Z-axis direction movement shown moves the introduction needle 41 away from the glue discharge member 42, so as to facilitate the discharge of the liquid 500 in the glue discharge member 42 by extrusion, gravity or other directions.

[0102] In step S24, based on the movement of the introduction assembly 40 to the liquid recovery device 50, a blowing assembly (not shown) is controlled to blow air to the introduction assembly 40, so as to blow the liquid 500 on the outer surface of the introduction assembly 40 into the liquid recovery device 50.

[0103] Specifically, the glue discharge member 42 is blown by the blowing assembly, so as to blow the liquid 500 in the glue discharge member 42 into the liquid recovery device 50. In another embodiment, the introduction needle 41 can also be blown by the blowing assembly, so as to blow the liquid 500 on the outer surface of the introduction needle 41 into the liquid recovery device 50.

[0104] In this way, the liquid introduction method facilitates the discharge of the liquid 500 in the glue discharge member 42 or the liquid 500 on the outer surface of the introduction needle 41 by performing steps S22-S24.

[0105] Please refer to Figure 2a and Figure 2b In some embodiments, after performing step S22 or performing step S24, the liquid introduction method further comprises step S23.

[0106] In step S23, based on the movement of the introduction assembly 40 to the liquid recovery device 50, the introduction assembly 40 is controlled to move in a first direction, so as to introduce the liquid 500 in the introduction assembly 40 into the liquid recovery device 50.

[0107] Specifically, after the second driving assembly 32 and the third driving assembly 33 of the transfer device 30 drive the introduction assembly 40 to move to the liquid recovery device 50, the introduction assembly 40 is controlled to move in the first direction, so as to outwardly discharge the liquid 500 in the introduction assembly 40, and further discharge the solidified, semi-solidified or contaminated liquid 500 in the introduction needle 41, so as to avoid the solidified, semi-solidified or contaminated liquid 500 from being introduced into the workpiece 200 again, thereby affecting the production yield of the workpiece 200. In this way, the liquid introduction method facilitates the discharge of the liquid 500 in the introduction needle 41 by performing step S23.

[0108] In some embodiments, the order of steps S24 and S23 can be interchanged. When the liquid 500 in the glue discharge member 42 is less, step S24 can also be omitted.

[0109] Please refer to Figure 2a and Figure 2b In some embodiments, the liquid introduction method further comprises step S26.

[0110] In step S26, the introduction assembly 40 is caused to flow into the first liquid and the second liquid.

[0111] Specifically, the liquid 500 includes a first liquid and a second liquid, the first and the second are respectively accommodated in a first tank and a second tank, when it is needed to guide the workpiece 200 into the liquid 500, the first and the second are respectively controlled to flow into the guide assembly 40, the first and the second can be mixed in a mixing chamber, specifically, the first tank and the second tank are respectively controlled to flow into the mixing chamber through a pipeline for mixing, and then flow into the guide assembly 40 after being mixed in the mixing chamber. In other embodiments, the mixing chamber can not be provided, and the first tank and the second tank are directly controlled to flow into the guide assembly 40 through the pipeline. It should be noted that the first liquid and the second liquid have different compositions, and the solidification time of the first liquid and the second liquid is also different.

[0112] It can be understood that the step S26 can be triggered based on the instruction that the guide assembly 40 moves away from the workpiece 200, can also be triggered by the operator actively, and can also be triggered when the liquid guiding instruction is generated. The specific setting can be made according to the actual situation.

[0113] Please refer to Figure 2a and Figure 2b In some embodiments, after the step S22 is performed, the liquid guiding method further includes a step S28.

[0114] In the step S28, the guide assembly 40 is caused to flow into the first liquid, and the flow of the second liquid is stopped.

[0115] Specifically, the solidification time of the first liquid can be greater than the solidification time of the second liquid. After the step S22 is performed, or after the work of guiding the liquid 500 into all the workpieces 200 is completed, or when it is needed to stop the work of guiding the liquid 500, the guide assembly 40 is caused to flow into the first liquid, and the flow of the second liquid is stopped, so that the guide assembly 40 is filled with the first liquid. The guide assembly 40 is controlled to move in the first direction, so that the first liquid fills the guide needle 41, so that the liquid 500 in the guide needle 41 does not solidify within a predetermined time, facilitating the work to be performed again; and it is also beneficial to protect the guide needle 41, avoiding the replacement of the guide needle 41 due to the solidification of the liquid 500 in the guide needle 41, and reducing the production cost. In this way, by performing the step S28, the liquid guiding method is beneficial to protect the guide needle 41 and reduce the production cost.

[0116] It can be understood that the step S28 can be triggered based on the instruction that the guide assembly 40 moves away from the workpiece 200, can also be triggered by the operator actively, and can also be triggered when the liquid guiding instruction is generated. The specific setting can be made according to the actual situation.

[0117] Please refer to Figure 3 , Figure 5In some embodiments, due to the presence of gas in the workpiece 200, the gas will affect the introduction of the liquid 500, thereby reducing the introduction efficiency of the liquid 500; and the gas will enter the liquid 500, thereby causing the liquid 500 to be unable to uniformly fill the workpiece 200, resulting in the liquid 500 being not full, lacking liquid 500, and the like after solidification. In order to improve the introduction efficiency of the liquid 500, and eliminate the not full, lack of liquid 500, and the like after solidification of the liquid 500, the liquid introduction device 100 further comprises a cover 60, the cavity 20 is provided with a first opening 22 and a second opening 23, and the first opening 22 is in fluid connection with a gas extraction device (not shown in the figure). The cover 60 is connected with the frame 34, the cover 60 is connected with the workpiece 200, the glue removal member 42 is inserted into the cover 60 and is used for abutting to the liquid inlet 201 of the workpiece 200, and the introduction needle 41 penetrates through the glue removal member 42 and is used for inserting into the liquid inlet 201. The second driving assembly 32 and the third driving assembly 33 of the control transfer device 30 are moved to the second opening 23 of the cavity 20 through the frame 34 to seal the cavity 20, so that the cavity 20 and the cover 60 form a sealed environment.

[0118] In an embodiment, after the workpiece 200 is placed in the cavity 20, the control transfer device 30 drives the introduction assembly 40, the cover 60 and the cavity 20 to move relatively, so that the cover 60 is moved to the second opening 23 of the cavity 20 to seal the cavity 20, and the glue removal member 42 abuts to the liquid inlet 201 of the workpiece 200; the gas extraction device extracts the gas in the sealed cavity 20 through the first opening 22, so that a vacuum environment is formed in the cavity 20. The introduction assembly 40 introduces the liquid 500 into the workpiece 200 in the vacuum environment. In this way, since there is no gas affecting the introduction of the liquid 500 in the vacuum environment, and no gas enters the liquid 500 to cause bubbles in the liquid 500, the liquid 500 can flow unobstructed in the workpiece 200, which is beneficial to improve the introduction efficiency of the liquid 500; and the liquid 500 can uniformly fill the workpiece 200, eliminating the not full, lack of liquid 500, and the like after solidification of the liquid 500, which is beneficial to improve the production yield.

[0119] Please refer to Figure 6 On the basis of the above-mentioned embodiments, the step S02 of the liquid introduction method comprises steps S022-S024.

[0120] Step S022, monitoring whether the vacuum environment in which the workpiece 200 is located reaches a preset vacuum value.

[0121] Specifically, whether the vacuum environment in the cavity 20 reaches the preset vacuum value is monitored to determine that the gas in the workpiece 200 is completely discharged, avoiding the gas in the workpiece 200 affecting the introduction of the liquid 500, and avoiding the gas in the workpiece 200 entering the liquid 500.

[0122] At step S024, the liquid introduction instruction is generated based on the vacuum environment in which the workpiece 200 is located reaching a preset vacuum value.

[0123] Specifically, the liquid introduction instruction is generated based on the vacuum environment in which the workpiece 200 is located reaching a preset vacuum value, indicating that there is no gas in the cavity 20 and the workpiece 200. The preset vacuum value can be negative pressure 20 mbar, for example.

[0124] In this way, the liquid introduction method facilitates generating the liquid introduction instruction after forming the vacuum environment by executing steps S022-S024, ensures that the liquid 500 can flow unhindered in the workpiece 200, and is beneficial to improving the introduction efficiency of the liquid 500; and ensures that the liquid 500 can be uniformly filled into the workpiece 200, eliminating the malformation, lack of liquid 500 and other defects caused by the solidification of the liquid 500, and is beneficial to improving the production yield.

[0125] Please refer to Figure 7 On the basis of the above embodiment, the step S08 of the liquid introduction method includes steps S082-S086.

[0126] At step S082, the introduction assembly 40 is stopped from moving in the first direction based on the introduction parameter of the liquid 500 reaching a preset parameter.

[0127] Specifically, when the introduction parameter of the liquid 500 reaches the preset parameter, the introduction assembly 40 is controlled to stop moving, so that the introduction assembly 40 no longer introduces the liquid 500.

[0128] At step S084, the first stop time of the introduction assembly 40 is monitored based on the introduction assembly 40 being stopped from moving in the first direction.

[0129] Specifically, the first stop time of the introduction assembly 40 is monitored, and during the first stop time, the cavity 20 needs to be broken to vacuum to facilitate taking out the workpiece 200 and placing the workpiece 200 again under the atmospheric pressure environment. The breaking vacuum can be achieved by opening the first opening 22 or other ways, for example, controlling the air extraction device to be disconnected from the first opening 22 to release the air. For another example, other openings are provided on the cavity 20 and controllable valve bodies are arranged at the openings, and the cavity 20 is broken to vacuum by opening the valve bodies. In an embodiment, other openings are provided on the cavity 20, and electrically controlled valve bodies are arranged at the openings, and the cavity 20 is broken to vacuum by controlling the valve bodies to be opened, so that the vacuum environment of the cavity 20 is broken to vacuum and the cavity 20 returns to the atmospheric pressure environment.

[0130] At step S086, the liquid suction instruction is generated when the first stop time reaches a first preset time.

[0131] Specifically, after determining that the first stop time reaches the first preset time, for example, the first preset time can be 1-3s, and optionally, the first preset time is 2s, the cavity 20 has returned to atmospheric pressure or is close to return to atmospheric pressure, the liquid 500 in the workpiece 200 begins to overflow outward, at this time, the liquid back suction instruction is generated, so that the liquid 500 in the workpiece 200 flows into the introduction assembly 40.

[0132] Please continue to refer to Figure 7 In some embodiments, the step S086 of the liquid introduction method further includes steps S0862-S0864.

[0133] In step S0862, it is determined that the first stop time reaches the first preset time, and it is monitored that the gas pressure environment in which the workpiece 200 is located reaches a preset gas pressure value.

[0134] Specifically, after determining that the first stop time reaches the first preset time, it is monitored that the gas pressure environment in the cavity 20 in which the workpiece 200 is located reaches a preset gas pressure value. The preset gas pressure value can be atmospheric pressure or close to atmospheric pressure.

[0135] In step S0864, based on the gas pressure environment in which the workpiece 200 is located reaching the preset gas pressure value, a liquid back suction instruction is generated.

[0136] Specifically, based on the gas pressure environment in the cavity 20 in which the workpiece 200 is located reaching the preset gas pressure value, that is, the cavity 20 returns to atmospheric pressure or is close to atmospheric pressure, the liquid back suction instruction is generated.

[0137] In this way, by executing the steps S082-S086, the liquid introduction method generates a liquid back suction instruction after the vacuum environment of the cavity 20 is broken, so that the liquid 500 can flow back to the introduction assembly 40, and the liquid 500 is prevented from overflowing out of the workpiece 200.

[0138] Please refer to Figure 8 The liquid introduction mechanism 300 further includes a processor 310 electrically connected with the introduction assembly 40. The processor 310 is used to execute the following steps S02-S10.

[0139] In step S02, a liquid introduction instruction is generated.

[0140] In step S04, based on the liquid introduction instruction, the introduction assembly 40 is controlled to move in a first direction to introduce the liquid 500 to the workpiece 200.

[0141] In step S06, it is monitored that an introduction parameter of the workpiece 200 introducing the liquid 500 reaches a preset parameter.

[0142] In step S08, based on the introduction parameter of the liquid 500 reaching the preset parameter, a liquid back suction instruction is generated.

[0143] In step S10, the introducing assembly 40 is controlled to move in the second direction based on the liquid suction instruction, so as to suck the liquid 500.

[0144] The processor 310 can be a central processing unit (CPU), and can also include other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, and the like. The general-purpose processor can be a microprocessor or the processor 310 can also be any conventional processor. The processor 310 can be configured to receive data, process data, store data, and send data. In some embodiments, the processor 310 can also perform the steps of the liquid introducing method as described in any of the above embodiments.

[0145] In some embodiments, referring to Figure 9 The introducing assembly 40 further includes a barrel 43, a driving member 44, and a transmission member 45. The barrel 43 is connected to the frame 34, and the barrel 43 is connected to a liquid source such as a liquid supply device (not shown) and the introducing needle 41, respectively, so that the liquid 500 in the liquid supply device flows to the introducing needle 41 through the barrel 43. The liquid supply device can be a liquid reservoir or the like. The driving member 44 is arranged in the barrel 43 and is electrically connected to the processor 310. The transmission member 45 is arranged in the barrel 43 and is connected to the driving member 44. The driving member 44 can be a motor, configured to drive the transmission member 45 to move in the first direction under the control of the processor 310, so as to introduce the liquid 500 to the workpiece 200. The driving member 44 is configured to drive the transmission member 45 to move in the second direction under the control of the processor 310, so as to suck the liquid 500. In this way, by arranging the barrel 43, the driving member 44, and the transmission member 45, the introducing assembly 40 can realize the functions of introducing the liquid 500 and sucking the liquid 500.

[0146] In an embodiment, an end of the transmission member 45 away from the driving member 44 has external threads, and an end of the barrel 43 has internal threads, and a flow gap of the liquid 500 is formed between the external threads and the internal threads. When the transmission member 45 is driven by the driving member 44 to move in the first direction or in the second direction, the liquid 500 in the flow gap is guided outwards or flows back by the external threads, so as to realize the functions of introducing the liquid 500 and sucking the liquid 500.

[0147] In another embodiment, the driving member 44 can be a driving rod, and the transmission member 45 can be a piston which is tightly sleeved with the cylinder 43. The driving rod pushes the piston to the first direction (i.e. to the direction perpendicular to the movement of the workpiece 200) to guide the liquid in the cylinder 43 to the workpiece 200, and the driving rod pulls the piston to the second direction (i.e. to the direction perpendicular to the movement away from the workpiece 200) to suck at least part of the liquid in the workpiece 200 to the cylinder 43.

[0148] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application.

Claims

1. A liquid introducing method for introducing a liquid to a workpiece, wherein, The workpiece is a mold installed with a product, and the method comprises: controlling the introduction assembly to move in a first direction, and introducing the liquid into the liquid inlet and the forming cavity of the workpiece in a vacuum environment in the cavity through the flow gap formed between the inner thread and the outer thread of the introduction assembly; monitoring the introduction parameter of the liquid to the workpiece to reach a preset parameter; stopping the introduction assembly from moving in the first direction based on the introduction parameter of the liquid reaching the preset parameter; monitoring the first stop time of the introduction assembly based on the stopping of the introduction assembly from moving in the first direction, and breaking the vacuum of the vacuum environment of the cavity to restore the cavity to an atmospheric pressure environment; determining that the first stop time reaches a first preset time to generate a liquid back-suction instruction; controlling the introduction assembly to move in a second direction based on the liquid back-suction instruction, and back-sucking at least part of the liquid through the flow gap formed between the inner thread and the outer thread to make the liquid level of the liquid in the forming cavity lower than the liquid inlet and / or the overflow port.

2. The liquid introduction method as claimed in claim 1, wherein, Further comprising: monitoring the vacuum environment of the workpiece to reach a preset vacuum value; generating the liquid introduction instruction to trigger the execution of the step of "controlling the introduction assembly to move in a first direction" based on the vacuum environment of the workpiece reaching the preset vacuum value.

3. The liquid introduction method of claim 1, wherein the step of determining that the first stop time reaches a first preset time to generate the liquid back-suction instruction comprises: determining that the first stop time reaches a first preset time, and monitoring the atmospheric pressure environment of the workpiece to reach a preset atmospheric pressure value; generating the liquid back-suction instruction based on the atmospheric pressure environment of the workpiece reaching the preset atmospheric pressure value.

4. The liquid introduction method of claim 1, wherein the liquid introduction method further comprises: monitoring the movement parameter of the introduction assembly moving in the second direction to reach a preset movement parameter; stopping the introduction assembly from moving in the second direction based on the movement parameter of the introduction assembly moving in the second direction reaching the preset movement parameter; monitoring the second stop time of the introduction assembly based on the stopping of the introduction assembly from moving in the second direction; determining that the second stop time reaches a second preset time to generate the instruction of the introduction assembly moving away from the workpiece; controlling the introduction assembly to move away from the workpiece based on the instruction of the introduction assembly moving away from the workpiece.

5. The liquid introduction method of claim 4, wherein the liquid introduction method further comprises: controlling the introduction assembly to move to a liquid recovery device based on the instruction of the introduction assembly moving away from the workpiece; controlling the air blowing assembly to blow air to the introduction assembly to blow the liquid on the outer surface of the introduction assembly into the liquid recovery device based on the movement of the introduction assembly to the liquid recovery device.

6. The liquid introduction method of claim 4, wherein the liquid introduction method further comprises: controlling the introduction assembly to move to a liquid recovery device based on the instruction of the introduction assembly moving away from the workpiece; based on the import assembly moving to the liquid recovery device, controlling the import assembly to move in the first direction to import the liquid in the import assembly to the liquid recovery device.

7. The liquid import method of claim 6, wherein, the liquid comprises a first liquid and a second liquid; the liquid import method further comprises: causing the import assembly to flow into the first liquid and the second liquid.

8. The liquid import method of claim 7, wherein, the liquid import method further comprises: causing the import assembly to flow into the first liquid and stop flowing into the second liquid.

9. The liquid introduction method as claimed in claim 1, wherein, further comprising: determining that the import assembly is connected to the workpiece; based on the import assembly being connected to the workpiece, generating the liquid import instruction to trigger the execution of the step of "controlling the import assembly to move in the first direction".

10. A liquid introducing mechanism for introducing a liquid to a workpiece, wherein, the workpiece is a mold installed with a product, and the liquid import mechanism comprises an import assembly and a processor electrically connected to the import assembly, and the processor is configured to: control the import assembly to move in a first direction and import the liquid into a liquid inlet and a forming cavity of the workpiece in a vacuum environment in a cavity through a flow gap formed between an inner thread and an outer thread of the import assembly; monitor a preset parameter of an import parameter of the liquid imported into the workpiece; based on the import parameter of the liquid reaching the preset parameter, stop the import assembly from moving in the first direction; based on the import assembly stopping moving in the first direction, monitor a first stop time of the import assembly and cause the vacuum environment of the cavity to break vacuum to restore the cavity to an atmospheric pressure environment; determine that the first stop time reaches a first preset time, and generate a liquid back suction instruction; based on the liquid back suction instruction, control the import assembly to move in a second direction to back suction at least part of the liquid through the flow gap formed between the inner thread and the outer thread, so that the liquid level of the liquid in the forming cavity is lower than the liquid inlet and / or the overflow port.

11. The liquid introduction mechanism of claim 10, wherein, the import assembly comprises: a barrel for fluid connection with a liquid source; a driving member disposed in the barrel and electrically connected to the processor; a transmission member connected to the driving member; the driving member drives the transmission member to move in the first direction to import the liquid to the workpiece; and the driving member drives the transmission member to move in the second direction to back suction at least part of the liquid.

12. A liquid introducing apparatus for introducing a liquid to a workpiece, wherein, comprising: the liquid import mechanism of claim 10 or 11; a feeding mechanism for conveying the workpiece to the liquid import mechanism.

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