Lens barrel mold and lens barrel molding method

Abstract

The application discloses a lens barrel mold, which comprises a female mold core II, a female mold core II subassembly arranged in the female mold core II, a male mold core II, a male mold core II subassembly and a push block arranged in the male mold core II, a core-pulling subassembly with a forming part matched with the inner cavity of the lens barrel II, and a tooth shaft with a toothed part matched with the internal thread; when the mold is closed, the forming part and the toothed part are sequentially inserted into the female mold core II and surrounded by the female mold core II, the female mold core II subassembly, the male mold core II, the male mold core II subassembly and the push block to form a molding cavity; when the mold is opened, the toothed part and the forming part are sequentially withdrawn from the lens barrel II after the toothed part of the tooth shaft is toothed. The application further discloses a lens barrel molding method. By adopting the core-pulling subassembly to form the inner cavity of the lens barrel and the tooth shaft to form the internal thread by toothing, the integrated subassembly of the inner cavity and the internal thread of the molded lens barrel can be split into the core-pulling subassembly and the tooth shaft, so that the coaxiality and the circularity of the inner cavity of the lens barrel are ensured, and the difficulty of lens barrel correction and the cost of mold manufacturing are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molds, and particularly relates to a lens barrel mold and a lens barrel forming method. BACKGROUND

[0002] With the trend of rapid development of new energy vehicles, the demand for imaging lenses is increasing, and the quality requirements for imaging lenses are also increasing. In the daily use of vehicles, temperature changes are inevitable, and when the temperature of the lens changes, the lens and other structural parts in the lens will expand and contract, causing the focal point to shift. This phenomenon is called lens temperature drift. The improvement scheme for temperature drift is to change the traditional dispensing fastening method to screw locking and then dispensing. When the lens expands and contracts, the screw will also expand and contract, causing the structural parts in the lens to expand and contract synchronously, reducing the degree of focal point shift and improving temperature drift.

[0003] The existing internal thread type lens barrel is designed with internal threads at the end of lens barrel assembly, and the lock ring is locked by the internal threads and then glued. At present, most of the lens barrel molds for producing internal thread type lens barrels are as shown in the drawing. Figure 1 The forming cavity of the lens barrel 1200 is formed by the female die core 13, the female die 11, the male die core 12 and the male die core 14, and the internal threads and the internal cavity of the lens barrel 1200 are formed by the male die core 14. This easily causes the male die core 14 to rotate with the internal cavity of the lens barrel 1200 when the male die core 14 is twisted and the threads are removed, which makes it difficult to meet the design requirements for the roundness and coaxiality of the internal cavity of the lens barrel 1200, especially for the lens barrel with a deep internal cavity, which has a more obvious effect on the precision of the internal cavity of the lens barrel. Moreover, since the initial thread position of the male die core 14 is random when the mold is closed, it is difficult to determine the correction position, which causes correction difficulties and the need for multiple mold type repairs in the later stage, greatly increasing the mold manufacturing cost. In addition, there is no guiding structure when the male die core 14 is twisted, and the internal thread pitch is ensured by the threads of the injection molded part when the threads are removed, which easily causes the threads of the product to be pulled in actual production, affecting the production stability and yield of the lens barrel. SUMMARY

[0004] The purpose of the present application is to provide a lens barrel mold and a lens barrel forming method to improve lens temperature drift, ensure lens coaxiality and roundness, ensure lens imaging quality, and reduce mold manufacturing cost.

[0005] In a first aspect, the present application provides a lens barrel mold, comprising: a female mold core II, which is internally provided with a female mold core subassembly; a male mold core II, which is internally provided with a male mold core subassembly and a push block; a core-pulling sub, which has a forming part adapted to the inner cavity of the lens barrel II; and a tooth shaft, which has a threaded part adapted to the inner thread of the lens barrel II; when the female mold core II and the male mold core II are closed, the forming part and the threaded part are sequentially inserted into the female mold core II, and together with the female mold core II, the female mold core subassembly, the male mold core II, the male mold core subassembly, and the push block form a cavity for injection molding of the lens barrel II; when the female mold core II and the male mold core II are opened, the threaded part and the forming part sequentially exit the lens barrel II after the tooth shaft is threaded.

[0006] The present application can split the integrated male mold core subassembly of the lens barrel inner cavity and inner thread into a core-pulling sub and a tooth shaft by using the core-pulling sub to form the lens barrel inner cavity and using the tooth shaft to thread the lens barrel to form the inner thread, so as to ensure the forming precision (coaxiality and circularity) of the lens barrel inner cavity, greatly improve the lens temperature drift, ensure the imaging quality of the lens, and greatly reduce the lens barrel correction difficulty and mold manufacturing cost by setting the tooth shaft.

[0007] Further, the tooth shaft driving assembly includes a driver and a transmission assembly, and the driver drives the tooth shaft to thread through the transmission assembly.

[0008] Further, the transmission assembly includes a driving wheel connected with the tooth shaft, a transmission wheel I in meshing transmission with the driving wheel, a transmission wheel II in meshing transmission with the transmission wheel I, a transmission shaft I connected with the transmission wheel II, a transmission shaft II connected with the transmission shaft I, a transmission wheel III connected with the transmission shaft II, and a driven wheel in meshing transmission with the transmission wheel III, and the driven wheel is connected with the output shaft of the driver.

[0009] Further, the tooth shaft driving assembly includes a driver and a transmission assembly, and the driver drives the tooth shaft to thread through the transmission assembly.

[0010] Further, the tooth shaft driving assembly includes a driver and a transmission assembly, and the driver drives the tooth shaft to thread through the transmission assembly.

[0011] Further, the connecting rod mechanism comprises a push block connecting rod connected with the push block shaft, and a push block driving rod connected with the push block connecting rod through a connecting shaft, and the push block driving rod is connected with the push block spring pin and the push block base shaft respectively.

[0012] Further, the push block spring pin is penetrated by the push block driving rod, one end of the push block spring pin is penetrated by a spring arranged in the push block base, and the other end of the push block spring pin abuts against the delay pull rod.

[0013] Further, the delay pull rod is provided with a first mold opening section and a second mold opening section, when the push block spring pin abuts against the first mold opening section, the core-pulling ejection mold plate can drive the forming part to exit the lens barrel II, and when the push block spring pin abuts against the second mold opening section, the core-pulling ejection mold plate can drive the push block to eject the lens barrel II.

[0014] Further, the support assembly is further away from the female mold core II, and the support assembly comprises a ejector pin and an ejector pin plate insert arranged at the bottom of the ejector pin, the ejector pin can abut against the bottom end of the tooth shaft, and the ejector pin plate insert can abut against the bottom end of the core-pulling pin.

[0015] In the second aspect, the application provides a lens barrel forming method, and specifically comprises the following steps:

[0016] Step 1, sequentially return and close the forming part of the core-pulling pin, the twisted tooth part of the tooth shaft to the female mold core II;

[0017] Step 2, combine the female mold core II provided with the female mold core pin assembly with the male mold core II provided with the male mold core pin assembly and the push block, so that the forming part and the twisted tooth part are inserted into the female mold core II, and the forming part, the twisted tooth part, the female mold core II, the female mold core pin assembly, the male mold core II, the male mold core pin assembly and the push block jointly form a cavity for injection molding of the lens barrel II;

[0018] Step 3, drive the support assembly to be close to the female mold core II, so that the support assembly abuts against the bottom end of the tooth shaft and the core-pulling pin;

[0019] Step 4, injection molding, forming the lens barrel II in the cavity;

[0020] Step 5, drive the support assembly to be away from the female mold core II, and the exit distance is H1;

[0021] Step 6, open the mold of the female mold core II and the male mold core II, and the opening distance is H2;

[0022] Step 7, stop the mold opening action, drive the twisted tooth part of the tooth shaft to twist the thread on the lens barrel II to form an internal thread, and then drive the twisted tooth part of the tooth shaft to exit the lens barrel II, and the exit distance is H3;

[0023] Step 8, drive the forming part of the core-pulling pin to exit the lens barrel II, and complete the mold opening of the lens barrel II.

[0024] The application can ensure the position accuracy of the forming part and the twisted tooth part in the cavity when the mold is closed by inserting the forming part of the core puller and the twisted tooth part of the tooth shaft into the female mold core II in sequence, so that the forming accuracy of the lens barrel can be ensured; meanwhile, the twisted tooth part is twisted first and then the forming part of the core puller and the twisted tooth part of the tooth shaft are withdrawn from the lens barrel II in sequence when the mold is opened, so that the accuracy of the twisted tooth position can be ensured, thereby the coaxiality and the circularity of the inner cavity of the lens barrel and the yield of the lens barrel product can be ensured, the temperature drift of the lens is improved, the imaging quality of the lens is ensured, and the correction difficulty and the mold manufacturing cost are greatly reduced.

[0025] Further, the step 8 specifically comprises the following steps:

[0026] Step 8.1, driving the forming part of the core puller to exit the lens barrel II by the core puller driving assembly, and the exit distance is H4;

[0027] Step 8.2, continuing to drive the forming part of the core puller to exit the lens barrel II by the core puller driving assembly, and the exit distance is H5, and then continuing to open the mold between the female mold core II and the male mold core II to a set stroke, and the opening of the lens barrel II is completed;

[0028] H2>H1>H3>(H4+H5), the core puller driving assembly comprises a push block close to the forming part of the core puller, a connecting rod mechanism connected with the push block, a push block spring pin and a push block base connected with the connecting rod mechanism, a delay pull rod abutting against the push block spring pin, and a core pulling ejection plate driving the delay pull rod and the core puller to move, the push block spring pin is in sliding connection with the push block base, and the core pulling ejection plate drives the forming part to exit the lens barrel II while sequentially driving the push block to exit the lens barrel II through the delay pull rod, the push block spring pin and the connecting rod mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a lens barrel mold in the prior art.

[0030] Figure 2 It is a structural schematic diagram of a lens barrel mold in the prior art.

[0031] Figure 3 It is Figure 2 It is an enlarged view of A in FIG. 8.

[0032] Figure 4 It is a schematic diagram of a tooth shaft driving assembly in the lens barrel mold of the application.

[0033] Figure 5 It is Figure 4 It is a partial schematic diagram of the tooth shaft driving assembly.

[0034] Figure 6A schematic view of a core-pulling assembly in a lens barrel mold according to the present application.

[0035] Figure 7 A sectional view of a core-pulling assembly in a lens barrel mold according to the present application.

[0036] Figure 8 A schematic view of a lens barrel mold stripping structure according to the present application.

[0037] Figure 9 A flow chart of a lens barrel forming method according to the present application.

[0038] Explanation of reference numerals in the drawings:

[0039] 1 - female mold core I, 2 - male mold core I, 3 - female mold core insert I, 4 - male mold core insert I, 200 - lens barrel I;

[0040] 100 - lens barrel II, 10 - female mold core II, 20 - male mold core II;

[0041] 31 - female mold core insert II, 32 - female mold core insert III, 33 - female mold core insert IV;

[0042] 41 - male mold core insert II, 42 - male mold core insert III, 43 - male mold core insert IV, 44 - male mold core insert V;

[0043] 51 - tooth shaft, 511 - twisted tooth portion, 512 - guide portion, 521 - driving wheel, 522 - mounting shaft, 523 - transmission wheel I, 524 - transmission wheel II, 525 - transmission shaft I, 526 - transmission shaft II, 527 - transmission wheel III, 528 - driven wheel, 53 - tooth shaft guide;

[0044] 61 - core-pulling insert, 611 - forming portion, 621 - push block, 6221 - push block connecting rod, 6222 - connecting shaft, 6223 - push block driving rod, 623 - push block spring pin, 624 - push block base, 625 - time-delay pull rod, 626 - spring, 627 - core-pulling ejection template;

[0045] 71 - ejector pin, 72 - ejector pin plate insert; DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of 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.

[0049] First embodiment

[0050] Please refer to Figures 2 to 8 The present application provides a lens barrel mold, which can be applied to injection molding of an inner thread vehicle-mounted lens barrel. Specifically, the lens barrel mold comprises a female mold core II 10, a male mold core II 20, a core-pulling insert 61 and a tooth shaft 51. The female mold core II 10 is internally provided with a female mold core insert assembly, which comprises a female mold core insert II 31, a female mold core insert III 32 and a female mold core insert IV 33, and the female mold core insert II 31, the female mold core insert III 32 and the female mold core insert IV 33 are all provided with exhaust holes to facilitate the timely exhaust of air during mold closing, and the bottom of the female mold core insert III 32 is provided with a groove; the male mold core II 20 is internally provided with a male mold core insert assembly and a push block 621, and the male mold core insert assembly comprises a male mold core insert II 41, a male mold core insert III 42, a male mold core insert IV 43 and a male mold core insert V 44; the top of the core-pulling insert 61 is provided with a molding portion 611 matched with the inner cavity of the lens barrel II 100 to be molded, a push block 621 with a top surface flush with the top surface of the male mold core II 20 is arranged near the molding portion 611, and a protrusion matched with the groove at the bottom of the female mold core insert III 32 is arranged at the top end of the core-pulling insert 61; the top of the tooth shaft 51 is provided with a toothed portion 511 matched with the inner thread of the lens barrel II 100 to be molded, and the top end of the toothed portion 511 can abut against the bottom end shoulder of the molding portion 611 of the core-pulling insert 61.

[0051] The lens barrel mold provided by the embodiment of the present application is provided with a plurality of female mold cores and a plurality of male mold cores in the female mold core II 10 and the male mold core II 20 according to the structural characteristics of the lens barrel II 100 and for improving the yield of the lens barrel II 100; when the female mold core II 10 and the male mold core II 20 are combined, the forming part 611 of the core pulling core 61 is inserted into the female mold core II 10 and the protrusion at the top of the core pulling core 61 is embedded into the groove at the bottom of the female mold core III 32, and then the twisted tooth part 511 of the tooth shaft 51 is inserted into the female mold core II 10 and the top of the twisted tooth part 511 is abutted against the bottom end shoulder of the forming part 611 of the core pulling core 61, so that the forming part 611 of the core pulling core 61, the twisted tooth part 511 of the tooth shaft 51, the female mold core II 10, the female mold core I 31, the female mold core III 32, the female mold core IV 33, the male mold core II 20, the push block 621, the male mold core I 41, the male mold core III 42, the male mold core IV 43 and the male mold core V 44 jointly form a cavity for injection molding of the lens barrel II 100; after the lens barrel II 100 is formed, when the female mold core II 10 and the male mold core II 20 are separated, the twisted tooth part 511 of the tooth shaft 51 is used to twist the teeth of the lens barrel II 100 to form internal threads, and then the twisted tooth part 511 of the tooth shaft 51 is withdrawn from the lens barrel II 100, and then the forming part 611 of the core pulling core 61 is withdrawn from the lens barrel II 100, and the mold opening of the lens barrel II 100 is completed.

[0052] The lens barrel mold provided by the embodiment of the present application is provided with a plurality of female mold cores and a plurality of male mold cores in the female mold core II 10 and the male mold core II 20 according to the structural characteristics of the lens barrel II 100 and for improving the yield of the lens barrel II 100; when the female mold core II 10 and the male mold core II 20 are combined, the forming part 611 of the core pulling core 61 is inserted into the female mold core II 10 and the protrusion at the top of the core pulling core 61 is embedded into the groove at the bottom of the female mold core III 32, and then the twisted tooth part 511 of the tooth shaft 51 is inserted into the female mold core II 10 and the top of the twisted tooth part 511 is abutted against the bottom end shoulder of the forming part 611 of the core pulling core 61, so that the forming part 611 of the core pulling core 61, the twisted tooth part 511 of the tooth shaft 51, the female mold core II 10, the female mold core I 31, the female mold core III 32, the female mold core IV 33, the male mold core II 20, the push block 621, the male mold core I 41, the male mold core III 42, the male mold core IV 43 and the male mold core V 44 jointly form a cavity for injection molding of the lens barrel II 100; after the lens barrel II 100 is formed, when the female mold core II 10 and the male mold core II 20 are separated, the twisted tooth part 511 of the tooth shaft 51 is used to twist the teeth of the lens barrel II 100 to form internal threads, and then the twisted tooth part 511 of the tooth shaft 51 is withdrawn from the lens barrel II 100, and then the forming part 611 of the core pulling core 61 is withdrawn from the lens barrel II 100, and the mold opening of the lens barrel II 100 is completed.

[0053] As a further improvement of the embodiment of the present application, the lens barrel mold further comprises a tooth shaft driving assembly, which is arranged away from the female mold core II 10 and close to the middle part of the tooth shaft 51, and is used to drive the tooth shaft 51 to perform the tooth twisting action on the lens barrel II 100. Specifically, the tooth shaft driving assembly comprises a driver (not shown in the figure) and a transmission assembly. The transmission assembly comprises a driving wheel 521 connected with the tooth shaft 51 through a key, a transmission wheel I 523 engaged with the driving wheel 521, an installation shaft 522 penetrating through the transmission wheel I 523 and having two ends installed on the male mold side through bearings, a transmission wheel II 524 engaged with the transmission wheel I 523, a transmission shaft I 525 connected with the transmission wheel II 524 through a key and installed on the male mold side through a bearing, a transmission shaft II 526 connected with one end of the transmission shaft I 525 through a flat bit latch structure, a transmission wheel III 527 connected with the transmission shaft II 526 through a key and installed on the male mold side through a bearing, and a driven wheel 528 engaged with the transmission wheel III 527, which can be connected with the output shaft of the driver, so that the driver can drive the tooth twisting part 511 of the tooth shaft 51 to perform the tooth twisting action on the lens barrel II 100 through the transmission assembly. More preferably, in the embodiment of the present application, the driver can be a servo motor, and the driving wheel, the transmission wheel and the driven wheel in the transmission assembly can all be ordinary gears. In other embodiments, the structure and form of the driver and the transmission assembly are not specifically limited, as long as the tooth shaft can accurately control the tooth twisting action on the lens barrel.

[0054] Please refer to Figure 5 and Figure 6 The transmission wheel I 523 is engaged with the two driving wheels 521, that is, the transmission wheel I 523 can simultaneously drive the two driving wheels 521 to rotate, thereby driving the two tooth shafts 51 connected with the two driving wheels 521 to twist the teeth, realizing one mold with two holes, that is, the molding of two lens barrels II 100 is completed at one time, improving the production efficiency. In actual application, more than two mold holes can be arranged according to the structure of the lens barrel and the overall structure of the mold, so as to realize the molding of multiple lens barrels at one time, and therefore the present application is not limited to one mold with two holes.

[0055] As a further improvement of the embodiment of the present application, the lens barrel mold further comprises a tooth shaft guide 53, which is arranged away from the female mold core II 10 and close to the bottom of the tooth shaft 51, for guiding the rotation of the tooth shaft 51 and driving the tooth shaft 51 away from or close to the female mold core II 10. Specifically, a guide portion 512 is arranged at the bottom of the tooth shaft 51, which is consistent with the pitch and rotation direction of the toothed portion 511; correspondingly, a screw guide portion is arranged on the tooth shaft guide 53, which is matched with the guide portion 512 on the tooth shaft 51, so that the tooth shaft 51 can be threadedly connected with the tooth shaft guide 53, thereby not only can the rotation of the tooth shaft 51 be guided to stably thread when the tooth shaft driving assembly drives the tooth shaft 51 to rotate and thread, but also the tooth shaft 51 can be driven away from or close to the female mold core II 10 by rotating the tooth shaft guide 53 to cooperate with mold opening or closing. It should be noted that the rotation of the tooth shaft guide 53 can adopt the prior art, which will not be described here.

[0056] As a further improvement of the embodiment of the present application, the lens barrel mold further comprises a core-pulling driver assembly which is arranged close to the male mold cavity II 10 and drives the forming part 611 of the core-pulling driver 61 to completely exit the lens barrel II 100. Specifically, the core-pulling driver assembly comprises a push block 621 close to the forming part 611 of the core-pulling driver 61, a connecting rod mechanism connected to the push block 621 through a pin shaft, a push block spring pin 623 and a push block base 624 connected to the connecting rod mechanism through a pin shaft, a delay pull rod 625 abutting against the push block spring pin 623, and a core-pulling ejection template 627 driving the delay pull rod 625 and the core-pulling driver 61 to move. The push block 621 is arranged below the lens barrel II 100 and comprises a plurality of flat top surfaces for facilitating the ejection of the lens barrel II 100, and a plurality of lugs on the bottom surface for facilitating the connection with the connecting rod mechanism. The connecting rod mechanism comprises a push block connecting rod 6221 connected to the push block 621 through a pin shaft, a push block driving rod 6223 connected to the push block connecting rod 6221 through a connecting shaft 6222, and the push block driving rod 6223 is connected to the push block spring pin 623 and the push block base 624 through pin shafts. The push block base 624 is installed on the male mold side, and the push block spring pin 623 is slidably connected to the push block base 624. A spring 626 is installed in the push block base 624 and penetrates one end of the push block spring pin 623, and the other end of the push block spring pin 623 abuts against the delay pull rod 625. The push block driving rod 6223 penetrates the push block spring pin 623 and is connected to the push block connecting rod 6221 and the push block base 624 at both ends. The delay pull rod 625 is provided with a first mold opening section and a second mold opening section. When the push block spring pin 623 abuts against the first mold opening section of the delay pull rod 625, the core-pulling ejection template 627 can drive the forming part 611 of the core-pulling driver 61 to exit the lens barrel II 100 by a small amount. When the push block spring pin 623 abuts against the second mold opening section of the delay pull rod 625, the core-pulling ejection template 627 can drive the push block driving rod 6223 and the push block connecting rod 6221 to drive the push block 621 to eject the lens barrel II 100, so that the forming part 611 of the core-pulling driver 61 completely exits the lens barrel II 100. It should be noted that when a mold has two cavities, three push blocks 621 are arranged, and the middle push block 621 is driven only through the connecting shaft 6222 and the push block connecting rod 6221 to simplify the mold structure and balance the force when the lens barrel is ejected. The core-pulling ejection template 627 can be used in the prior art, and thus will not be described here.

[0057] As a further improvement of the embodiment of the present application, the lens barrel mold further comprises a support assembly which is arranged away from the mold core II 10 and close to the pin shaft 51 and the bottom of the core pull 61, and is used to support the pin shaft 51 and the core pull 61. Specifically, the support assembly comprises a ejector pin 71 and an ejector plate insert 72 arranged at the bottom of the ejector pin 71. The top end of the ejector pin 71 penetrates through the pin shaft guide 53 and abuts against the bottom end of the pin shaft 51, and the top end of the ejector plate insert 72 abuts against the bottom end of the core pull 61. When the mold is closed, the ejector pin 71 abuts against the bottom end of the pin shaft 51 and the ejector plate insert 72 abuts against the bottom end of the core pull 61, so that the pin shaft 51 and the core pull 61 can be kept in a stable state during the forming of the lens barrel II 100, thereby further ensuring the forming quality of the lens barrel II 100.

[0058] Second embodiment

[0059] The present application provides a lens barrel forming method which applies the lens barrel mold in the first embodiment. Specifically, the lens barrel forming method comprises the following steps:

[0060] S1, the core pull driving assembly is used to drive the forming part 611 of the core pull 61 to return and close to the mold core II 10. The core pull driving assembly comprises a push block 621 close to the forming part 611 of the core pull 61, a connecting rod mechanism connected with the push block 621, a push block spring pin 623 and a push block base 624 connected with the connecting rod mechanism, a delay pull rod 625 abutting against the push block spring pin 623, and a core pull ejection plate 627 driving the delay pull rod 625 and the core pull 61 to move. The push block spring pin 623 is slidingly connected with the push block base 624, and the core pull ejection plate 627 can drive the forming part 611 of the core pull 61 to insert into the mold core II 10.

[0061] S2, the pin shaft guide 53 is used to drive the twisted part 511 of the pin shaft 51 to return and close to the mold core II 10. The pin shaft guide 53 is threadedly connected with the end opposite to the twisted part 511 of the pin shaft 51, so as to drive the pin shaft 51 to close to the mold core II 10.

[0062] S3, the female mold core II 10 with the female mold core subassembly and the male mold core II 20 with the male mold core subassembly and the push block 621 are closed to make the forming part 611 of the core pulling sub 61 and the twisted tooth part 511 of the dental axis 51 inserted into the female mold core II 10, and the forming part 611 and the twisted tooth part 511 and the female mold core II 10, the female mold core sub II 31, the female mold core sub III 32, the female mold core sub IV 33, the male mold core II 20, the push block 621, the male mold core sub II 41, the male mold core sub III 42, the male mold core sub IV 43 and the male mold core sub V 44 together form a cavity for injection molding the lens barrel II 100. The female mold core subassembly includes the female mold core sub II 31, the female mold core sub III 32 and the female mold core sub IV 33, the male mold core subassembly includes the male mold core sub II 41, the male mold core sub III 42, the male mold core sub IV 43 and the male mold core sub V 44, and the bottom surface of the female mold core II 10 is opposite to the top surface of the male mold core II 20.

[0063] S4, the support assembly is driven to approach the female mold core II 10 so that the support assembly abuts against the bottom end of the dental axis 51 and the core pulling sub 61.

[0064] S5, injection molding, forming the lens barrel II 100 in the cavity.

[0065] S6, the support assembly is driven to move away from the female mold core II 10 by a distance of H1.

[0066] S7, the female mold core II 10 and the male mold core II 20 are opened by a distance of H2.

[0067] S8, the opening action is stopped, the twisted tooth part 511 of the dental axis 51 is driven by the dental axis driving assembly to thread on the lens barrel II 100 to form an internal thread, and then the twisted tooth part 511 of the dental axis 51 is driven to move out of the lens barrel II 100 by a distance of H3. The dental axis driving assembly includes a driver and a transmission assembly, the transmission assembly includes a driving wheel 521 connected with the dental axis 51, a transmission wheel I 523 meshing with the driving wheel 521, a transmission wheel II 524 meshing with the transmission wheel I 523, a transmission shaft I 525 connected with the transmission wheel II 524, a transmission shaft II 526 connected with the transmission shaft I 525, a transmission wheel III 527 connected with the transmission shaft II 526, and a driven wheel 528 meshing with the transmission wheel III 527, and the driven wheel 528 is connected with the output shaft of the driver.

[0068] S9, the forming part 611 of the core pulling sub 61 is driven by the core pulling sub driving assembly to move out of the lens barrel II 100 by a distance of H4.

[0069] S10, continue to use the core pulling pin driving assembly to drive the forming part 611 of the core pulling pin 61 to exit the lens barrel 100, the exit distance is H5, and then continue to open the mold to the set stroke, and the lens barrel 100 is opened. Wherein, when the core pulling ejection template 627 drives the forming part 611 of the core pulling pin 61 to exit the lens barrel 100, the core pulling ejection template 627 can drive the push block spring pin 623 abutting to the delay pull rod 625 to move right by driving the delay pull rod 625 to move down, and then drive the connecting rod mechanism connected with the push block spring pin 623 to act, so that the connecting rod mechanism drives the push block 621 connected with it to eject the lens barrel 100; at the same time, H2>H1>H3>(H4+H5), to ensure that the mold is opened smoothly without obstruction.

[0070] When the mold is closed, the forming part of the core pulling pin and the twisted tooth part of the dental axis are inserted into the female mold core II in sequence, so that the position accuracy of the forming part and the twisted tooth part in the cavity can be ensured, and the forming accuracy of the lens barrel can be ensured; when the mold is opened, the twisted tooth is first twisted, and then the forming part of the core pulling pin and the twisted tooth part of the dental axis are sequentially withdrawn from the lens barrel II, so that the accuracy of the twisted tooth position can be ensured, and the coaxiality and the true circularity of the inner cavity of the lens barrel and the lens barrel product yield can be ensured, and then the lens temperature drift is improved, the lens imaging quality is ensured, and the correction difficulty and the mold manufacturing cost can be greatly reduced.

[0071] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A lens barrel mold, characterized in that, include: The female mold core II (10) is provided with a female mold core insert assembly; Male mold core II (20), wherein the male mold core II (20) is provided with a male mold core insert assembly and a push block (621); Core puller (61), the core puller (61) having a molding part (611) adapted to the inner cavity of the lens barrel II (100). And a toothed shaft (51), which has a threaded portion (511) adapted to the internal thread of the lens barrel II (100). When the female mold core II (10) and the male mold core II (20) are molded together, the forming part (611) and the threaded part (511) are inserted into the female mold core II (10) in sequence, and together with the female mold core II (10), the female mold core insert assembly, the male mold core II (20), the male mold core insert assembly, and the push block (621), they form a cavity for injection molding the lens barrel II (100); When the female mold core II (10) and the male mold core II (20) are opened, the tooth shaft (51) is twisted and the twisted part (511) and the forming part (611) are sequentially withdrawn from the lens tube II (100). It also includes a tooth shaft drive assembly located away from the master mold core II (10), the tooth shaft drive assembly including a driver and a transmission assembly, the driver driving the tooth shaft (51) to rotate the tooth through the transmission assembly; It also includes a tooth shaft guide (53) that is away from the master mold core II (10), the tooth shaft (51) having a guide portion (512) opposite to the coiled tooth portion (511), the tooth shaft guide (53) being threadedly connected to the guide portion (512) and the guide portion (512) having the same pitch as the coiled tooth portion (511); It also includes a core-pulling insert drive assembly that is far away from the female mold core II (10). The core-pulling insert drive assembly includes a push block (621) near the forming part (611) of the core-pulling insert (61), a linkage mechanism connected to the push block (621), a push block spring pin (623) and a push block base (624) connected to the linkage mechanism, a time-delayed pull rod (625) abutting against the push block spring pin (623), and a core-pulling ejection template (627) that drives the time-delayed pull rod (625) and the core-pulling insert (61) to move. The push block spring pin (623) is slidably connected to the push block base (624). The core-pulling ejection template (627) drives the forming part (611) to exit the lens barrel II (100) while simultaneously driving the push block (621) to eject the lens barrel II (100) through the time-delayed pull rod (625), the push block spring pin (623) and the linkage mechanism in sequence. The linkage mechanism includes a push block connecting rod (6221) that is shaft-connected to the push block (621), and a push block active rod (6223) that is connected to the push block connecting rod (6221) via a connecting shaft (6222). The push block active rod (6223) is shaft-connected to the push block spring pin (623) and the push block base (624) respectively. The push block spring pin (623) has the push block active rod (6223) passing through it. One end of the push block spring pin (623) has a spring (626) provided in the push block base (624) passing through it. The other end of the push block spring pin (623) abuts against the delay pull rod (625). The delay pull rod (625) is provided with a first mold opening section and a second mold opening section. When the push block spring pin (623) abuts against the first mold opening section, the core pulling ejector template (627) can drive the forming part (611) to exit the lens barrel II (100). When the push block spring pin (623) abuts against the second mold opening section, the core pulling ejector template (627) can drive the push block (621) to eject the lens barrel II (100).

2. The lens barrel mold according to claim 1, characterized in that: The transmission assembly includes a drive wheel (521) connected to the toothed shaft (51), a transmission wheel I (523) meshing with the drive wheel (521), a transmission wheel II (524) meshing with the transmission wheel I (523), a transmission shaft I (525) connected to the transmission wheel II (524), a transmission shaft II (526) connected to the transmission shaft I (525), a transmission wheel III (527) connected to the transmission shaft II (526), ​​and a driven wheel (528) meshing with the transmission wheel III (527). The driven wheel (528) is connected to the output shaft of the driver.

3. The lens barrel mold according to claim 1, characterized in that: It also includes a support assembly away from the female mold core II (10), the support assembly including an ejector pin (71) and an ejector plate insert (72) disposed at the bottom of the ejector pin (71), the ejector pin (71) abutting against the bottom end of the tooth shaft (51), and the ejector plate insert (72) abutting against the bottom end of the core puller (61).

4. A method for forming a lens barrel using a lens barrel mold as described in any one of claims 1-3, characterized in that, Specifically, the following steps are included: Step 1: In sequence, reposition the forming part (611) of the core puller (61) and the threaded part (511) of the tooth shaft (51) and bring them close to the female mold core II (10). Step 2: The female mold core II (10) with the female mold core insert assembly is closed with the male mold core II (20) with the male mold core insert assembly and the push block (621), so that the molding part (611) and the threaded part (511) are inserted into the female mold core II (10), and the molding part (611), the threaded part (511), the female mold core II (10), the female mold core insert assembly, the male mold core II (20), the male mold core insert assembly, and the push block (621) together form a cavity for injection molding the mirror barrel II (100); Step 3, drive the support assembly close to the female mold core II (10) so that the support assembly abuts against the bottom end of the tooth shaft (51) and the core puller (61); Step 4, injection molding, forming mirror tube II (100) in the cavity; Step 5: Drive the support assembly away from the female mold core II (10), with a withdrawal distance of H1; Step 6: Open the female mold core II (10) and the male mold core II (20) with a mold opening distance of H2; Step 7: Stop the mold opening action, drive the threaded part (511) of the toothed shaft (51) to thread on the lens barrel II (100) to form an internal thread, and then drive the threaded part (511) of the toothed shaft (51) to exit the lens barrel II (100) by a distance of H3. Step 8: Drive the molding part (611) of the core puller (61) to exit the lens barrel II (100) to complete the mold opening of the lens barrel II (100); Specifically, step 8 includes the following steps: Step 8.1, using the core-pulling insert driving assembly to drive the forming part (611) of the core-pulling insert (61) out of the lens barrel II (100), with an exit distance of H4; Step 8.2, continue to use the core-pulling insert drive assembly to drive the forming part (611) of the core-pulling insert (61) out of the mirror barrel II (100) by a distance of H5, and then continue to open the female mold core II (10) and male mold core II (20) to the set stroke to complete the mold opening of the mirror barrel II (100); Wherein, H2>H1>H3>(H4+H5), the core-pulling insert driving assembly includes a push block (621) near the forming part (611) of the core-pulling insert (61), a linkage mechanism connected to the push block (621), a push block spring pin (623) and a push block base (624) connected to the linkage mechanism, a delay pull rod (625) abutting against the push block spring pin (623), and a core-pulling ejection template (627) that drives the delay pull rod (625) and the core-pulling insert (61) to move. The push block spring pin (623) is slidably connected to the push block base (624). The core-pulling ejection template (627) drives the forming part (611) to exit the lens barrel II (100) while simultaneously driving the push block (621) to eject the lens barrel II (100) through the delay pull rod (625), the push block spring pin (623) and the linkage mechanism in sequence.

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