A mold for double-color injection molding

Abstract

The present invention relates to the field of mold technology, and in particular to a mold for two-color mold injection molding, including an upper mold, a lower mold, a lower base, a turntable, a rotation drive mechanism, a locking mechanism and a control module, wherein the rotation drive mechanism is connected to the turntable, the turntable is located between the lower base and the balance member, the turntable is rotationally connected to the balance member, an arc groove is provided on the turntable, a light-transmitting body is provided in the arc groove, a first detection unit corresponding to the arc groove is provided on the balance member, and a light source is provided on the lower base. The present invention realizes effective control of the rotation and stop process of the turntable and the upper and lower molds of the turntable based on optical signals through the cooperation of the light source in the lower base, the light-transmitting body on the turntable and the first detection unit on the balance member, so that the turntable can be accurately rotated to the position and stopped, the efficiency and stability of the device in exchanging the mold position are improved, the time interval of two-color mold injection molding is shortened, the product production efficiency is improved, and the time cost of product production is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a mold for double-color injection molding. Background Art

[0002] Two-color injection mold is a special mold process that allows two different types of plastics to be injected on the same injection molding machine and molded in two times, but the product is only ejected from the mold once. This process can produce parts made of two materials, which can be of different colors or different hardnesses, thereby improving the aesthetics and assembly performance of the product. Two-color injection molds are usually completed by a set of molds and require a special two-color injection molding machine for injection molding. In the process of realizing the present invention, the applicant found that the existing two-color injection molds have slow processing efficiency, which increases the time cost of product manufacturing. Summary of the invention

[0003] The purpose of this application is to provide a mold for two-color injection molding to solve the above technical problems existing in the prior art, mainly including the following main contents:

[0004] The present application provides a mold for double-color injection molding, including an upper mold, a lower mold, a lower base, a turntable, a rotation drive mechanism, a locking mechanism and a control module, wherein the lower mold is arranged on the turntable, the rotation drive mechanism is arranged on the lower base, the rotation output shaft of the rotation drive mechanism is connected to the turntable, a balancing piece is arranged on the lower base, the turntable is located between the lower base and the balancing piece, the turntable is rotatably connected to the balancing piece, an arc groove penetrating the turntable is arranged on the turntable, the arc center of the arc groove is located on the rotation axis of the turntable, a light-transmitting body is arranged in the arc groove, and along the rotation direction of the turntable, the light-transmitting body includes a first light-transmitting segment, a second light-transmitting segment and a third light-transmitting segment, the first light-transmitting segment, the second light-transmitting segment and the third light-transmitting segment The light transmittance is different, and a first detection unit corresponding to the arc groove is arranged on the balance piece, and the first detection unit is used to detect the light intensity. A groove is arranged on the lower base, and a light source is arranged in the groove, and the light source corresponds to the arc groove. When the light source, the third light-transmitting segment and the first detection unit are located on the same optical path, the lower mold corresponds to the upper mold; the locking mechanism is used to lock the rotating output shaft of the rotation drive mechanism when the lower mold corresponds to the upper mold, and the first detection unit, the rotation drive mechanism and the locking mechanism are respectively connected to the control module, and the control module is configured to: determine the working states of the rotation drive mechanism and the locking mechanism based on the detection signal of the first detection unit, so as to realize the control of the rotation speed of the turntable.

[0005] Furthermore, a first spectroscope corresponding to the light source is arranged in the groove, and the transmitted light of the first spectroscope is directed toward the arc groove. An optical path channel is arranged in the lower base, and the input port of the optical path channel is connected to the groove. Corresponding to the reflected light of the first spectroscope, a second detection unit is arranged in the optical path channel, and the second detection unit performs light intensity detection on the reflected light of the first spectroscope.

[0006] Furthermore, the second detection unit is connected to the control module, and the control module is further configured to verify the working stability of the light source or the first detection unit based on the detection signal of the second detection unit and the detection signal of the first detection unit.

[0007] Furthermore, a third detection unit is arranged on the turntable, and a second spectroscope is arranged in the optical path channel, the second spectroscope is used to separate the reflected light of the first spectroscope into emitted light toward the second detection unit and transmitted light toward the third detection unit, and the output port of the optical path channel corresponds to the third detection unit.

[0008] Furthermore, the third detection unit is connected to the control module, and the control module is further configured to: based on the detection signal of the third detection unit and the detection signal of the first detection unit, verify whether the turntable is rotated into place.

[0009] Furthermore, it also includes an upper base, on which a lifting drive mechanism is arranged, a rotary output shaft of the lifting drive mechanism is connected to the upper mold, and the lifting drive mechanism is used to adjust the distance between the upper mold and the lower mold.

[0010] Furthermore, the locking mechanism includes a base plate, a locking plate and an electromagnetic component. The base plate is connected to the outer shell of the rotary drive mechanism, the electromagnetic component is connected to the rotary output shaft of the rotary drive mechanism, the locking plate is located between the base plate and the electromagnetic component, the locking plate and the base plate are slidably connected along the axial direction of the rotary output shaft, the locking plate is connected to the base plate through a reset elastic component, and under normal conditions, the reset elastic component is in a compressed state to push the locking plate to abut against the electromagnetic component, a permanent magnet is provided on the locking plate, and the permanent magnet is correspondingly provided to the electromagnetic component, and when the electromagnetic component is in an energized state, the electromagnetic component generates a repulsive force on the permanent magnet to achieve a preset gap between the locking plate and the electromagnetic component.

[0011] Furthermore, the locking plate is provided with an annular groove, and the annular groove is used to accommodate a reset elastic member.

[0012] Furthermore, a protrusion is provided on one side of the substrate close to the electromagnetic component, a slide rail is provided on the peripheral wall of the protrusion, a through hole matching the protrusion is provided on the locking plate, the protrusion passes through the through hole, and a track groove matching the slide rail is provided on the inner wall of the through hole.

[0013] Furthermore, at least one of the locking plate and the electromagnetic component is provided with a friction layer, and the friction layer is used to increase the resistance to relative rotation between the locking plate and the electromagnetic component when the locking plate abuts against the electromagnetic component.

[0014] Compared with the prior art, the present invention has at least the following technical effects:

[0015] The present invention realizes effective control of the rotation into position and the stopping process of the turntable and the upper and lower molds of the turntable based on optical signals through the cooperation of the light source in the lower base, the light-transmitting body on the turntable and the first detection unit on the balance member, so that the turntable can be accurately rotated into position and stopped without the need for secondary adjustment of the position of the turntable and the mold, thereby improving the efficiency and stability of the device in replacing the mold position, reducing the maintenance frequency of the device, shortening the time interval of two-color mold injection molding, improving product production efficiency, and reducing the time cost of product production. At the same time, even if an error occurs at the output end of the rotation drive mechanism, it will not affect the control of the rotation into position and the stopping process by the optical signal, thereby improving the operation stability and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the mold of the present invention;

[0018] Figure 2 It is a schematic diagram of the connection result between the turntable and the lower base of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the balancing member of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the light-transmitting body of the present invention;

[0021] Figure 5 It is a schematic diagram of the internal structure of the turntable and the lower base of the present invention when they are working;

[0022] Figure 6 The present invention Figure 5 A partial enlarged view of the middle A;

[0023] Figure 7 It is a schematic diagram of the connection structure between the turntable and the rotary drive device of the present invention;

[0024] Figure 8 yes Figure 7Middle BB section view;

[0025] Fig. 9 It is a structural schematic diagram of the substrate of the present invention;

[0026] Fig.10 It is a structural schematic diagram of the locking plate of the present invention;

[0027] In the figure,

[0028] 10. lower base; 110. turntable; 111. arc groove; 120. balance member; 20. upper base; 30. rotation drive mechanism; 310. rotation output shaft; 40. locking mechanism; 410. substrate; 411. protrusion; 412. slide rail; 420. locking plate; 421. annular groove; 422. through hole; 423. track groove; 430. electromagnetic member; 440. reset elastic member; 450. permanent magnet; 460. friction layer; 50. lower mold; 60. upper mold; 710. light source; 720. translucent body; 721. first translucent section; 722. second translucent section; 723. third translucent section; 730. first detection unit; 740. first spectroscope; 750. second detection unit; 760. second spectroscope; 770. third detection unit; 780. optical path channel. DETAILED DESCRIPTION

[0029] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] Two-color injection mold is a special mold process that allows two different types of plastics to be injected on the same injection molding machine and molded in two times, but the product is only ejected once. This process can produce parts formed by two materials, which can be different colors or different soft and hard, thereby improving the product's aesthetics and assembly performance. Two-color injection molds are usually completed by a set of molds and require a special two-color injection molding machine for injection molding operations. The existing two-color injection molding machine, such as a two-color mold for molding automobile switches disclosed in Chinese patent publication number CN220447041U, drives the first turntable and the second turntable to rotate simultaneously through the cooperation of the electric mechanism and the transmission mechanism to realize the position exchange of the two molds. Due to the wear of the transmission mechanism in long-term work, there is a difference between the rotation angle of the electric mechanism and the rotation angle of the two molds, which makes the two molds unable to be turned into place, which not only affects the molding quality of the product, but also increases the risk of wear between the upper mold and the lower mold. It also requires manual regular maintenance to restore the rotation accuracy control. Too much manual control will not only increase the labor cost, but also reduce the equipment working efficiency due to maintenance, or additionally adjust the mold position to ensure that the mold position is turned into place, which also increases the time cost of product production. In order to solve the problem of time cost and production efficiency of two-color mold injection molding, the present application provides a mold for two-color mold injection molding that can improve production efficiency and reduce time cost by improving the rotation angle control accuracy and speed. The specific structure is shown in the following embodiment.

[0034] Embodiment 1:

[0035] The present application embodiment provides a mold for double-color injection molding, such as Figure 1 As shown, it includes an upper mold 60, a lower mold 50 (two upper molds 60, two lower molds 50, and the upper molds 60 and the lower molds 50 are arranged one by one), a lower base 10, a turntable 110, a rotation drive mechanism 30, a locking mechanism 40 and a control module, wherein the lower mold 50 is arranged on the turntable 110, and the rotation drive mechanism 30 is arranged on the lower base 10; Figures 5 to 8 As shown, the rotary output shaft 310 of the rotary drive mechanism 30 is connected to the turntable 110, and a balancing member 120 is provided on the lower base 10, and the turntable 110 is located between the lower base 10 and the balancing member 120, and the turntable 110 is rotatably connected to the balancing member 120 (preferably, the turntable 110 and the balancing member 120 are slidably connected by cooperating with an annular track), and the balancing member 120 and the lower base 10 cooperate to ensure the stability and coaxiality of the turntable 110 during rotation. In some embodiments, the turntable 110 and the lower base 10 are preferably rotatably connected (preferably, the turntable 110 and the lower base 10 are slidably connected by cooperating with an annular track); Figure 2 As shown, the turntable 110 is provided with an arc groove 111 that penetrates the turntable 110. The arc center of the arc groove 111 is located on the rotation axis of the turntable 110. A light-transmitting body 720 is provided in the arc groove 111. Figure 4 As shown, along the rotation direction of the turntable 110, the light-transmitting body 720 includes a first light-transmitting segment 721, a second light-transmitting segment 722 and a third light-transmitting segment 723, and the first light-transmitting segment 721, the second light-transmitting segment 722 and the third light-transmitting segment 723 have different light transmittances. The balance member 120 is provided with a first detection unit 730 corresponding to the arc groove 111, as shown in FIG. Figure 3 As shown, the first detection unit 730 is used to detect light intensity, and a groove is provided on the lower base 10, and a light source 710 is provided in the groove. The light source 710 and the arc groove 111 are located on the same circumference of the rotation axis of the turntable 110. When the light source 710, the third light-transmitting segment 723 and the first detection unit 730 are located on the same optical path, the lower mold 50 corresponds to the upper mold 60; the locking mechanism 40 is used to lock the rotating output shaft 310 of the rotating drive mechanism 30 when the lower mold 50 corresponds to the upper mold 60. The first detection unit 730, the rotating drive mechanism 30, and the locking mechanism 40 are respectively connected to the control module, and the control module is configured to: determine the working states of the rotating drive mechanism 30 and the locking mechanism 40 based on the detection signal of the first detection unit 730, so as to realize the control of the rotation speed of the turntable 110.

[0036] During use, when the positions of the two lower molds 50 need to be swapped, the rotary drive mechanism 30 works to drive the turntable 110 and the lower mold 50 on the turntable 110 to rotate synchronously. When the turntable 110 is about to rotate into place, the arc groove 111 on the turntable 110 rotates to between the first detection unit 730 and the light source 710, and the light signal generated by the light source 710 passes through the arc groove 111 and the first light-transmitting segment 721 of the light-transmitting body 720 and is emitted to the first detection unit 730. At this time, the first detection unit 730 detects that the light intensity changes from zero to a first preset value, indicating that the turntable 110 is about to rotate into place, and the control module can control the rotary drive mechanism 30 to start / prepare to decelerate, and then wait for the turntable 110 to continue to rotate, corresponding to The light signal generated by the light source 710 passes through the arc groove 111 and the second light-transmitting segment 722 of the light-transmitting body 720 and is emitted to the first detection unit 730. The first detection unit 730 detects that the light intensity changes from the first preset value to the second preset value, and the control module can control the rotation drive mechanism 30 to prepare for deceleration / prepare for stopping. In some embodiments, in order to reasonably control the deceleration speed of the rotation drive mechanism 30, the light transmittance of the second light-transmitting segment 722 can be set to gradually change along the rotation direction of the turntable 110. Correspondingly, the first detection unit 730 detects that the light intensity gradually changes, and the control module determines the deceleration rate of the rotation drive mechanism 30 based on the gradual change rate of the light intensity, so that the deceleration process of the turntable 110 is consistent with the rotation of the in-place margin. The first detection unit 730 detects that the light intensity changes to the third preset value, indicating that the turntable 110 has been rotated to the right position. At this time, the position reversal of the two molds is completed, and the control module can control the rotation drive mechanism 30 to stop working. At the same time, the locking mechanism 40 starts working to lock the rotation output shaft 310 of the rotation drive mechanism 30 to prevent the turntable 110 from continuing to rotate. Since the speed action of the turntable 110 is orderly reduced and stopped based on the intensity of the light signal, the turntable 110 can be accurately rotated to the right position and stopped without the need to rotate the turntable 110. 10 and the position of the mold are adjusted twice, which improves the efficiency and stability of the device in exchanging the mold position, reduces the maintenance frequency of the device, shortens the time interval of two-color mold injection molding (based on the effective control of the optical signal on the rotation into position and the rotation stop process, the rotation speed of the turntable 110 from starting to rotating to the path between the first light-transmitting section 721 and the corresponding position of the light source 710 can be reasonably increased, thereby further shortening the time interval of two-color mold injection molding), improves product production efficiency, and reduces the time cost of product production. At the same time, even if an error occurs at the output end of the rotation drive mechanism 30, it will not affect the control of the optical signal on the rotation into position and the rotation stop process, thereby improving the stability and safety of the device operation.

[0037] In order to avoid the problem of light intensity stability of the emitted light from the light source 710 affecting the working stability of the device, a first beam splitter 740 corresponding to the light source 710 can be arranged in the groove, and the transmitted light of the first beam splitter 740 is directed toward the arc groove. An optical path channel 780 is arranged in the lower base 10, and the input port of the optical path channel 780 is connected to the groove, corresponding to the reflected light of the first beam splitter 740. A second detection unit 750 is arranged in the optical path channel 780, and the second detection unit 750 performs light intensity detection on the reflected light of the first beam splitter 740; the emitted light of the light source is divided into a first reflected light and a first transmitted light by the first beam splitter 740, and the first transmitted light is directed to the first detection unit 730 for detection and control of the rotation into position and the rotation stop process, and the first reflected light is directed to the second detection unit 750 for checking the stability of the light intensity of the emitted light from the light source 710, so as to eliminate the light intensity change detected by the first detection unit 730 It is not caused by problems with the stability of the light source 710 itself. Correspondingly, the second detection unit 750 can be set to be connected to the control module, and the control module can be configured to: based on the detection signal of the second detection unit 750 and the detection signal of the first detection unit 730, verify the working stability of the light source 710 and / or the first detection unit 730. That is to say, if the light intensity detected by the second detection unit 750 is stable, then the light intensity detection result of the first detection unit 730 is accurate and reliable. If the light intensity detected by the second detection unit 750 fluctuates, it indicates that there is a problem with the light source 710, and the light intensity detection result of the first detection unit 730 is unreliable, and the device needs to be maintained to ensure the working stability and safety of the device. Preferably, the control module can issue a warning message at this time, and the warning message can be at least one of light information, sound information, text information, and image information.

[0038] In order to further improve the operation stability of the device, a third detection unit 770 can be arranged on the turntable 110, and a second beam splitter 760 is also arranged in the optical path channel 780. The second beam splitter 760 is used to divide the reflected light of the first beam splitter into the emitted light toward the second detection unit 750 and the transmitted light toward the third detection unit 770. The output port of the optical path channel 780 corresponds to the third detection unit 770; when the output port of the optical path channel 780 corresponds to the third detection unit 770, the upper mold 60 and the lower mold 50 correspond one to one; correspondingly, the third detection unit 770 can be connected to the control module, and the control module is configured to: based on the detection signal of the third detection unit 770 and the detection signal of the first detection unit 730, check whether the turntable 110 is rotated into place; that is, the first reflected light generated by the first beam splitter 740 will be emitted to the second beam splitter 760, and the second beam splitter 760 will divide the first reflected light into the second reflected light and the second transmitted light, and the third detection unit 770 will be used to detect the first reflected light and the second transmitted light. The second transmitted light is directed to the second detection unit 750 to verify the working stability of the light source 710 and / or the first detection unit 730; when the turntable 110 stops rotating (at this time, the first transmitted light passes through the third light-transmitting segment 723 and is directed to the first detection unit 730), the second reflected light passes through the output port of the optical path channel 780 and is just directed to the third detection unit 770. The third detection unit 770 detects a light intensity signal, indicating that the turntable 110 is rotated into place and the position exchange between the two lower molds 50 on the turntable 110 is accurately completed; if the first detection unit 730 detects that the light intensity signal is converted from the second light-transmitting segment 722 to the third light-transmitting segment 723, and the third detection unit 770 does not detect a light intensity signal, it indicates that the turntable 110 is not rotated into place, and there is a problem with the working stability of the first detection unit 730 or the light source 710, and the device needs to be shut down for maintenance, thereby realizing the secondary verification of the mold position exchange control and improving the operation stability and safety of the device.

[0039] In order to realize the normal operation of the device, an upper base 20 may be provided, wherein the upper base 20 is provided with a lifting drive mechanism, wherein the lifting output shaft of the lifting drive mechanism is connected to the upper mold, and the lifting drive mechanism is used to adjust the distance between the upper mold 60 and the lower mold 50. When working, the lifting drive mechanism controls the upper mold 60 and the lower mold 50 to fit in place, and then performs injection molding (for the two sets of molds on the turntable 110, the upper mold 60 and the lower mold 50 in the first position are matched to perform a primary injection molding, and the upper mold 60 and the lower mold 50 in the second position are matched to perform a secondary injection molding). After the injection molding is completed, the lifting drive mechanism controls the upper mold 60 and the lower mold 50 to separate, and the second position is placed. The product on the turntable 110 is taken out, and then the rotary drive mechanism 30 is started to exchange the positions of the turntable 110 and the two lower molds 50 on the turntable 110. After detecting that the position exchange is completed, the lifting drive mechanism controls the upper mold 60 and the lower mold 50 to fit in place and perform injection molding again (the upper mold 60 and the lower mold 50 originally in the first position are transferred to the second position, and the corresponding secondary injection molding is performed, and the upper mold 60 and the lower mold 50 originally in the second position are transferred to the first position. Since the product has been taken out, a primary injection molding can be performed), to achieve double-color mold injection molding; preferably, the upper base 20 is connected to the lower base 10 through a fixed column, and further, the balance member 120 is connected to the fixed column.

[0040] It should be noted that the lifting drive mechanism is a prior art, which can be a cylinder, a hydraulic cylinder or a ball screw, and is not specifically limited here; the rotating drive mechanism 30 is a prior art, which can be a motor, a rotating workbench, a turntable machine or a rotating manipulator, and is not specifically limited here. In this embodiment, the rotating drive mechanism 30 is preferably a servo motor.

[0041] In order to realize the locking mechanism 40 locking the rotating output shaft 310 of the rotating drive mechanism 30, as shown in FIG. Figure 7 and Figure 8As shown, a locking mechanism 40 can be provided, including a base plate 410, a locking plate 420 and an electromagnetic member 430. The base plate 410 is connected to the housing of the rotary drive mechanism 30, and the electromagnetic member 430 is connected to the rotary output shaft 310 of the rotary drive mechanism 30 to achieve synchronous rotation of the electromagnetic member 430 and the rotary output shaft 310. The locking plate 420 is located between the base plate 410 and the electromagnetic member 430. The locking plate 420 and the base plate 410 are slidably connected along the axial direction of the rotary output shaft 310. The locking plate 420 is connected to the base plate 410 through a reset elastic member 440. Under normal conditions, the reset elastic member 440 is in a compressed state to push the locking plate 420 to abut against the electromagnetic member 430. A permanent magnet 450 is provided on the locking plate 420. The permanent magnet 450 is correspondingly arranged with the electromagnetic member 430. When the electromagnetic member 430 is in an energized state, the locking plate 420 is locked. In the state, the electromagnetic member 430 generates a repulsive force on the permanent magnet 450 to achieve a preset gap between the locking plate 420 and the electromagnetic member 430; during the injection molding operation, the electromagnetic member 430 is in a power-off state, and the locking plate 420 abuts against the electromagnetic member 430 under the drive of the reset elastic member 440. Since the base plate 410 is fixed by the housing of the rotation drive mechanism 30, the locking plate 420 is also not movable based on the axial sliding connection between the locking plate 420 and the base plate 410. The electromagnetic component 430 can generate rotation around the axis, and then when the rotary output shaft 310 of the rotary drive mechanism 30 has a tendency to rotate, the locking plate 420 will generate friction resistance to the electromagnetic component 430, preventing the electromagnetic component 430 and the rotary output shaft 310 of the rotary drive mechanism 30 from rotating, thereby locking the rotary output shaft 310, preventing the turntable 110 from rotating due to accidental touch, affecting the normal operation of the injection molding work, and improving the safety and stability of the device operation; when it is necessary to rotate, the electromagnetic component 430 is first controlled to be energized, and the electromagnetic component 430 generates a repulsive force to push the permanent magnet 450 and the locking plate 420 apart, so that the locking plate 420 and the electromagnetic component 430 are separated, that is, the locking mechanism 40 releases the lock on the rotary output shaft 310, and then the rotary drive mechanism 30 can work to drive the turntable 110 to rotate, realizing the position exchange between the two lower molds 50 on the turntable 110, and then after the exchange is in place, the electromagnetic component 430 is powered off again, and the rotary output shaft 310 is locked again.

[0042] In some embodiments, Figure 8 and Fig.10 As shown, an annular groove 421 may be provided on the locking plate 420 , and the annular groove 421 is used to accommodate the resetting elastic member 440 .

[0043] To achieve the axial sliding connection between the locking plate 420 and the base plate 410 along the rotating output shaft 310, as shown in FIG. Figure 8 and Fig. 9As shown, a protrusion 411 can be provided on one side of the substrate 410 close to the electromagnetic member 430, a slide rail 412 is provided on the peripheral wall of the protrusion 411, a through hole 422 matching the protrusion 411 is provided on the locking plate 420, the protrusion 411 is penetrated through the through hole 422, and a track groove 423 matching the slide rail 412 is provided on the inner wall of the through hole 422; the protrusion 411 and the rotary output shaft 310 of the rotary drive mechanism 30 are coaxially arranged, and the protrusion 411 and the through hole 422 are connected to each other. 2, the locking plate 420 can slide axially along the rotary output shaft 310 of the rotary drive mechanism 30, and based on the cooperation between the slide rail 412 and the track groove 423, the circumferential rotation stroke of the locking plate 420 is limited, so that the locking plate 420 does not produce circumferential rotation, so that when the locking plate 420 and the electromagnetic member 430 abut, a rotational friction resistance is generated on the electromagnetic member 430, thereby preventing the electromagnetic member 430 and the rotary output shaft 310 of the rotary drive mechanism 30 from rotating.

[0044] In order to improve the locking effect of the locking mechanism 40 on the rotating output shaft 310, a friction layer 460 can be provided on at least one of the locking plate 420 and the electromagnetic component 430. The friction layer 460 is used to increase the relative rotation resistance between the locking plate 420 and the electromagnetic component 430 when the locking plate 420 abuts against the electromagnetic component 430.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold for double-color injection molding, characterized in that: The invention comprises an upper mold, a lower mold, a lower base, a turntable, a rotation drive mechanism, a locking mechanism and a control module, wherein the lower mold is arranged on the turntable, the rotation drive mechanism is arranged on the lower base, the rotation output shaft of the rotation drive mechanism is connected with the turntable, a balancing piece is arranged on the lower base, the turntable is located between the lower base and the balancing piece, the turntable is rotatably connected with the balancing piece, an arc groove penetrating the turntable is arranged on the turntable, the arc center of the arc groove is located on the rotation axis of the turntable, a light-transmitting body is arranged in the arc groove, and along the rotation direction of the turntable, the light-transmitting body comprises a first light-transmitting segment, a second light-transmitting segment and a third light-transmitting segment, and the first light-transmitting segment The light transmittance of the first light segment, the second light-transmitting segment and the third light-transmitting segment are different. A first detection unit corresponding to the arc groove is arranged on the balance member, and the first detection unit is used to detect the light intensity. A groove is arranged on the lower base, and a light source is arranged in the groove. The light source corresponds to the arc groove. When the light source, the third light-transmitting segment and the first detection unit are located on the same optical path, the lower mold corresponds to the upper mold; the locking mechanism is used to lock the rotating output shaft of the rotating drive mechanism when the lower mold corresponds to the upper mold. The first detection unit, the rotating drive mechanism and the locking mechanism are respectively connected to the control module, and the control module is configured The invention is as follows: based on the detection signal of the first detection unit, the working state of the rotation drive mechanism and the locking mechanism is determined to realize the control of the rotation speed of the turntable; a first spectroscope corresponding to the light source is arranged in the groove, and the transmitted light of the first spectroscope is directed toward the arc groove; an optical path channel is arranged in the lower base, and the input port of the optical path channel is connected with the groove, corresponding to the reflected light of the first spectroscope; a second detection unit is arranged in the optical path channel, and the second detection unit performs light intensity detection on the reflected light of the first spectroscope; the second detection unit is connected to the control module, and the control module is further configured to: based on the second detection unit The detection signal of the detection unit and the detection signal of the first detection unit are used to verify the working stability of the light source or the first detection unit; a third detection unit is arranged on the turntable, and a second spectroscope is also arranged in the optical path channel, the second spectroscope is used to divide the reflected light of the first spectroscope into the emitted light toward the second detection unit and the transmitted light toward the third detection unit, and the output port of the optical path channel corresponds to the third detection unit; the third detection unit is connected to the control module, and the control module is further configured to: based on the detection signal of the third detection unit and the detection signal of the first detection unit, verify whether the turntable is rotated into place.

2. The mold according to claim 1, characterized in that It also includes an upper base, on which a lifting drive mechanism is arranged, a rotary output shaft of the lifting drive mechanism is connected to the upper mold, and the lifting drive mechanism is used to adjust the distance between the upper mold and the lower mold.

3. The mold according to claim 2, characterized in that The locking mechanism includes a base plate, a locking plate and an electromagnetic component. The base plate is connected to the housing of the rotary drive mechanism, the electromagnetic component is connected to the rotary output shaft of the rotary drive mechanism, the locking plate is located between the base plate and the electromagnetic component, the locking plate and the base plate are slidably connected along the axial direction of the rotary output shaft, the locking plate is connected to the base plate through a reset elastic component, under normal conditions, the reset elastic component is in a compressed state to push the locking plate to abut against the electromagnetic component, a permanent magnet is arranged on the locking plate, and the permanent magnet is arranged corresponding to the electromagnetic component, and when the electromagnetic component is in an energized state, the electromagnetic component generates a repulsive force on the permanent magnet to achieve a preset gap between the locking plate and the electromagnetic component.

4. The mold according to claim 3, characterized in that The locking plate is provided with an annular groove, and the annular groove is used for accommodating the resetting elastic member.

5. The mold according to claim 3, characterized in that: A protrusion is arranged on one side of the substrate close to the electromagnetic component, a slide rail is arranged on the peripheral wall of the protrusion, a through hole matching the protrusion is arranged on the locking plate, the protrusion passes through the through hole, and a track groove matching the slide rail is arranged on the inner wall of the through hole.

6. The mold according to claim 3, characterized in that At least one of the locking plate and the electromagnetic component is provided with a friction layer, and the friction layer is used to increase the resistance to relative rotation between the locking plate and the electromagnetic component when the locking plate abuts against the electromagnetic component.

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