Efficient double-color mold for processing heart rate lens of smart watch

Abstract

The invention relates to the technical field of injection molds, and provides a high-efficiency double-color mold for processing a smart watch heart rate lens, the high-efficiency double-color mold comprises a first injection mold and a second injection mold, each horizontal sliding block is provided with two groups of opposite wedge-shaped surfaces, and a first longitudinal shovel base and a second longitudinal shovel base can be in sliding contact with the two groups of opposite wedge-shaped surfaces respectively; springs are arranged between the first rear injection mold core and the horizontal sliding block, between the second rear injection mold core and the horizontal sliding block and between the horizontal sliding block and the limiting piece, the first horizontal shovel base is embedded below the horizontal sliding block, the limiting piece is fixedly arranged on the first rear injection mold and the second rear injection mold, and a straight groove and an inclined groove are formed in the surface of the rear mold insert from top to bottom. The first horizontal shovel base can make sliding contact with the inclined groove, a protrusion is arranged at the top end of the rear mold insert, the auxiliary reset piece can apply downward pressure to the rear mold insert through the straight groove and is used for preventing the rear mold insert from being bonded by a first injection material in the first injection rear mold core, and efficient and high-precision machining of the two-color mold is achieved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a high-efficiency two-color mold for processing heart rate lenses in smartwatches. Background Technology

[0002] The heart rate sensor lens in smartwatches uses Fresnel lenses. The transparent lens has Fresnel patterns, which can focus a large area of ​​light onto the heart rate IC, making the data measured by the watch more accurate. The mold used to make the heart rate sensor lens in smartwatches is a two-color mold. The core working principle of injection molding two-color mold is to switch cavities by rotating / translating the mold, and with the cooperation of two injection molding machines, two different colors or materials of plastic are injected into different cavities of the same mold one after another. After curing, a one-piece two-color / two-material product is formed.

[0003] First injection molding: The first injection molding machine injects A-color plastic into the first cavity of the mold, forming the basic part of the molded product (semi-finished product).

[0004] Mold switching: The mold core with the semi-finished product is accurately transferred to the second cavity through the mold's built-in rotating mechanism (commonly turntable type) or translation mechanism. The positioning and fitting accuracy of the semi-finished product is guaranteed by the mold's guiding and positioning structure.

[0005] Second injection molding: The second injection molding machine injects the B-color plastic into the second cavity, wrapping or attaching it to the semi-finished product. The two plastics are fused together in the mold. After cooling, the mold is opened and the complete two-color product is taken out.

[0006] The existing two-color molds used for processing heart rate detection lenses in smartwatches still have the following defects: (1) Usually, two-color molds are two completely identical rear molds. That is to say, the rear mold insert can usually only move in one direction and cannot achieve the filling of the rear mold side structure hole by the second injection. During the second injection, the filling is only the appearance of the front mold glue position, and the rear mold side structure cannot be covered by the second injection material; (2) During long-term operation, the shovel base in the lower mold may cause inaccurate movement or vibration due to wear, gap or inertia. The shovel base may not be able to provide downward power to the rear mold insert. The adhesion between the first injection material and the rear mold insert may not be able to ensure that the rear mold insert returns to its original position smoothly. Summary of the Invention

[0007] The purpose of this invention is to provide a high-efficiency two-color mold for processing heart rate lenses in smartwatches, aiming to solve the problems existing in the current two-color molds.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency dual-color mold for processing heart rate lenses in smartwatches, comprising a first injection mold and a second injection mold. The first injection mold includes a first pre-injection mold and a first post-injection mold. The second injection mold includes a second pre-injection mold and a second post-injection mold. The first pre-injection mold includes a first pre-injection mold core and a first longitudinal shovel base. The second pre-injection mold includes a second pre-injection mold core and a second longitudinal shovel base. The first post-injection mold and the second post-injection mold respectively include a first post-injection mold core and a second post-injection mold core. The wedge-shaped surfaces of the first and second longitudinal shovel bases are in opposite positions. Lens inserts are fixedly disposed on both the first and second post-injection mold cores. The first and second post-injection molds further include:

[0009] The horizontal slider is provided with two sets of opposite wedge-shaped surfaces. The first longitudinal shovel base and the second longitudinal shovel base can slide in contact with the two sets of opposite wedge-shaped surfaces respectively. Springs are provided between the first post-injection mold core and the horizontal slider, between the second post-injection mold core and the horizontal slider, and between the horizontal slider and the limiting member.

[0010] The first horizontal shovel base is embedded below the horizontal slider;

[0011] A limiting component fixedly installed in the first and second injection molds;

[0012] A rear mold insert is movably fitted onto the surface of the lens insert. The surface of the rear mold insert is provided with a straight groove and an inclined groove from top to bottom. The first horizontal shovel base can slide in contact with the inclined groove. A protrusion is provided at the top of the rear mold insert.

[0013] The receiving groove is provided on the back of the first and second injection mold cores, and the mold insert and lens insert both pass through the receiving groove;

[0014] An auxiliary positioning component is provided in the receiving groove. The auxiliary positioning component can apply downward pressure to the rear mold insert through the straight groove to prevent the rear mold insert from being stuck to the first injection material in the first injection mold core.

[0015] As a further embodiment of the present invention, the auxiliary positioning component includes a core shell, a second horizontal shovel base, and an elastic body. The core shell is fixedly disposed in the receiving groove, the second horizontal shovel base is slidably disposed in the core shell, and the elastic body is disposed at one end of the core shell and slidably contacts the second horizontal shovel base. The second horizontal shovel base can enter the straight groove.

[0016] As a further embodiment of the present invention, a guide rail is provided at one end of the core shell near the second horizontal shovel base, and the second horizontal shovel base can slide horizontally and longitudinally within the guide rail.

[0017] As a further embodiment of the present invention, a spring core is provided between the second horizontal shovel base and the core shell, the spring core being used to drive the second horizontal shovel base into the straight groove.

[0018] As a further embodiment of the present invention, the elastomer includes an end cap, a second spring core, and a limiting rod. The second spring core is connected between the end cap and the core shell. The end cap is fixedly connected to the limiting rod, which slides in contact with the inner side of the core shell. The second horizontal shovel base contacts the surface of the end cap above. The second spring core is used to apply downward pressure to the rear mold insert through the second horizontal shovel base.

[0019] As a further embodiment of the present invention, the first post-injection mold and the second post-injection mold are also fixedly provided with baffles, and the horizontal slider is in sliding contact with the baffles.

[0020] As a further embodiment of the present invention, a rotary mold is also included, wherein the first post-injection mold and the second post-injection mold are both fixedly disposed on the surface of the rotary mold.

[0021] The beneficial effects of this invention are as follows: This invention not only achieves simultaneous filling of the front mold appearance area and part of the rear mold area to produce special overmolded products, but also, through the forced downward pressure and buffering effect of the auxiliary positioning component, even if the first horizontal shovel base is worn, the second horizontal shovel base can force the rear mold insert to move downward by 0.3mm, overcoming the adhesion resistance between the first injection material and the rear mold insert protrusion, ensuring reliable reset of the rear mold insert, and avoiding jamming or incomplete reset caused by adhesion. Furthermore, during the mold closing process, the damping and buffering effect of the spring core two can slow down the rising speed of the rear mold insert, preventing its end protrusion from having a hard collision with the first injection mold core, thereby avoiding protrusion breakage or wear, improving mold life, and realizing efficient and high-precision processing of two-color molds. It is particularly suitable for complex overmolded products such as heart rate lenses for smartwatches. Attached Figure Description

[0022] Figure 1 This is a perspective view of the first and second injection molds of the present invention.

[0023] Figure 2 This is a bottom view of the first and second pre-injection molds of the present invention.

[0024] Figure 3 This is a top view of the first and second post-injection molds of the present invention.

[0025] Figure 4 This is a planar sectional view of the first and second injection molds of the present invention.

[0026] Figure 5 This is a schematic diagram showing the displacement of the first and second post-injection molds of the present invention.

[0027] Figure 6This is a planar schematic diagram of the first and second ejector materials in the overmolded product of the present invention.

[0028] Figure 7 This is a schematic diagram showing the displacement of the rear mold insert during the first injection molding process of the present invention.

[0029] Figure 8 This is a schematic diagram showing the displacement of the rear mold insert during the second injection molding process of the present invention.

[0030] Figure 9 This is a perspective view of the rear mold insert of the present invention.

[0031] Figure 10 This is an exploded view of the auxiliary positioning component of the present invention.

[0032] Figure 11 This is a schematic diagram of the assembly of the auxiliary positioning component and the rear mold insert of the present invention.

[0033] Figure 12 This is an assembly diagram of the auxiliary positioning component, the rear mold insert, and the rear mold core of the present invention.

[0034] Figure 13 For the present invention Figure 3 Cross-sectional view of AA.

[0035] Figure 14 For the present invention Figure 3 Cross-sectional view of BB.

[0036] Reference numerals: 100-First injection mold, 110-First pre-injection mold, 111-First pre-injection mold core, 112-First longitudinal shovel base, 120-First post-injection mold, 121-First post-injection mold core, 1211-Receiving groove, 130-Horizontal slider, 131-Spring, 140-First horizontal shovel base, 150-Rear mold insert, 151-Slanted groove, 152-Straight groove, 153-Protrusion, 160-Auxiliary return component, 161-Core shell, 1611-Guide rail, 162-Second horizontal shovel base, 1621-Spring core one, 163-Elastic body, 1631-End cap, 1632-Spring core two, 1633-Limiting rod, 170-Limiting component, 180-Lens insert, 190-Stop bar;

[0037] 200 - Second injection mold, 210 - Second pre-injection mold, 211 - Second pre-injection mold core, 212 - Second longitudinal shovel base, 220 - Second post-injection mold, 221 - Second post-injection mold core;

[0038] 300-Rotational mold;

[0039] 400 - First shot;

[0040] 500 - Second projectile. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0043] Please see Figures 1 to 14 In one embodiment of the present invention, a high-efficiency dual-color mold for processing heart rate lenses for smartwatches includes a first injection mold 100, a second injection mold 200, and a rotary mold 300. The first injection mold 100 includes a first pre-injection mold 110 and a first post-injection mold 120. The second injection mold 200 includes a second pre-injection mold 210 and a second post-injection mold 220. The first post-injection mold 120 and the second post-injection mold 220 are both fixedly disposed on the surface of the rotary mold 300. The rotary mold 300 integrates the first post-injection mold 120 and the second post-injection mold 220 to achieve rapid repositioning. The first pre-injection mold 110 includes a first pre-injection mold core 111 and a first longitudinal shovel base 112; the second pre-injection mold 210 includes a second pre-injection mold core 211 and a second longitudinal shovel base 212; the first post-injection mold 120 and the second post-injection mold 220 respectively include a first post-injection mold core 121 and a second post-injection mold core 221; the wedge-shaped surfaces of the first and second longitudinal shovel bases 112 are in opposite positions; both the first and second post-injection mold cores 121 and 221 are fixedly provided with lens inserts 180; the first and second post-injection molds 120 also include:

[0044] A horizontal slider 130 is provided with two sets of opposite wedge-shaped surfaces. The first longitudinal shovel base 112 and the second longitudinal shovel base 212 can slide in contact with the two sets of opposite wedge-shaped surfaces respectively. Springs 131 are provided between the first post-injection mold core 121 and the horizontal slider 130, between the second post-injection mold core 221 and the horizontal slider 130, and between the horizontal slider 130 and the limiting member 170. The first post-injection mold 120 and the second post-injection mold 220 are also fixedly provided with a stop bar 190, and the horizontal slider 130 slides in contact with the stop bar 190.

[0045] A first horizontal shovel base 140 is embedded below a horizontal slider 130;

[0046] A limiting member 170 is fixedly installed on the first post-injection mold 120 and the second post-injection mold 220;

[0047] A rear mold insert 150 is movably sleeved on the surface of the lens insert 180. The surface of the rear mold insert 150 is provided with a straight groove 152 and an inclined groove 151 from top to bottom. The first horizontal shovel base 140 can slide in contact with the inclined groove 151. A protrusion 153 is provided at the top of the rear mold insert 150.

[0048] The receiving groove 1211 is provided on the back of the first post-injection mold core 121 and the second post-injection mold core 221, and the rear mold insert 150 and the lens insert 180 both pass through the receiving groove 1211.

[0049] An auxiliary positioning component 160 is provided in the receiving groove 1211. The auxiliary positioning component 160 can apply downward pressure to the rear mold insert 150 through the straight groove 152 to prevent the rear mold insert 150 from being stuck to the first injection material 400 in the first injection mold core 121.

[0050] In this embodiment of the invention, the first longitudinal spade base 112 of the first pre-injection mold 110 and the second longitudinal spade base 212 of the second pre-injection mold 210 have wedge-shaped surfaces in opposite positions. This allows the first longitudinal spade base 112 to drive the horizontal slider 130 to move inward during the first injection molding process, while the second longitudinal spade base 212 drives the horizontal slider 130 to move outward during the second injection molding process. The horizontal slider 130 is provided with two sets of opposite wedge-shaped surfaces that slide in contact with the longitudinal spade bases. The first horizontal spade base 140 is embedded below the horizontal slider 130 and cooperates with the inclined groove 151 of the rear mold insert 150 to convert the horizontal movement into the longitudinal movement of the rear mold insert 150. Spring 131 is used for resetting, but the main movement is driven by the shovel base to ensure reliability. This reverse design allows the rear mold insert 150 to perform opposite movements during the first and second shots: moving upwards during the first shot and downwards during the second shot, creating conditions for the second ejector material 500 to fill the rear mold cavity (structural hole). This invention achieves smooth and precise motion conversion through wedge-shaped sliding contact and the assistance of spring 131, with a displacement accuracy of 0.3mm, meeting the microstructural requirements of heart rate lenses. As the rear mold insert 150 retracts downwards during the second shot mold closing, the structural hole of the first ejector material 400 is partially exposed. The second ejector material 500 can not only fill the front mold surface but also the structural hole of the rear mold, forming a complete overmolded product. This capability is difficult to achieve in existing two-color molds because the rear mold side is usually not dynamically adjustable. This invention solves the problem that the rear mold insert 150 in existing molds can usually only move in one direction, making it impossible to fill the structural hole of the rear mold side during the second shot. This invention simplifies the mold structure through the reverse shovel base, eliminating the need for an additional drive source and achieving bidirectional precise control.

[0051] Please see Figures 9 to 14In another embodiment of the present invention, the auxiliary positioning component 160 includes a core shell 161, a second horizontal shovel base 162, and an elastic body 163. The core shell 161 is fixedly disposed in the receiving groove 1211, the second horizontal shovel base 162 is slidably disposed in the core shell 161, and the elastic body 163 is disposed at one end of the core shell 161 and slides in contact with the second horizontal shovel base 162. The second horizontal shovel base 162 can enter the straight groove 152, and the core shell 161 is close to the second horizontal shovel base 162. One end of the elastic body 163 is provided with a guide rail 1611, and the second horizontal shovel base 162 can slide horizontally and longitudinally within the guide rail 1611. A spring core 1621 is provided between the second horizontal shovel base 162 and the core shell 161. The spring core 1621 is used to drive the second horizontal shovel base 162 into the straight groove 152. The elastic body 163 includes an end cap 1631, a second spring core 1632, and a limiting rod 1633. The second spring core 1632 is connected between the end cap 1631 and the core shell 161. 1631 is fixedly connected to a limiting rod 1633, which slides in contact with the inner side of the core shell 161. The second horizontal shovel base 162 contacts the surface of the end cap 1631 above. The spring core 1632 is used to apply downward pressure to the rear mold insert 150 through the second horizontal shovel base 162. In long-term operation, the first horizontal shovel base 140 may fail due to frequent friction, and may cause inaccurate movement or vibration due to wear, clearance or inertia. It can act as a fine-tuning device. Based on the 40 drive, it provides smoother and more precise displacement control. During high-speed injection molding, the energizing component can reduce the vibration or displacement of the insert and avoid product size deviation. For example, after the first injection 400 is injected, the first horizontal spade base 140 may not be able to provide downward power to the rear mold insert 150. The adhesion between the first injection 400 and the rear mold insert 150 may not be able to ensure that the rear mold insert 150 returns to its original position smoothly. However, the elasticity provided by the auxiliary return component 160 can ensure that the rear mold insert 150 is reliably reset.

[0052] In this embodiment of the invention, the first horizontal shovel base 140 is responsible for movement control, while the auxiliary positioning component 160 is responsible for safety protection. Each performs its specific function. The inclined surface design of the second horizontal shovel base 162, combined with the elastic force of the spring core 1621 towards the rear mold insert 150, facilitates the installation of the auxiliary positioning component 160 between the receiving groove 1211 and the rear mold insert 150. During initial installation, the second horizontal shovel base 162 is in contact with the surface of the rear mold insert 150, and the spring core 1621 is in a compressed state. When the second horizontal shovel base 162 aligns with the straight groove 152, the elastic force of the spring core 1621 pushes the second horizontal shovel base 162 horizontally into the straight groove 152. Without the auxiliary positioning component 160... The return element 160 provides cushioning. Forced movement may directly transmit impact force, increasing the risk of breakage. The return element 160 provides elasticity, damping, and cushioning, absorbing energy during movement and preventing breakage or wear caused by hard contact. For example, after the second injection material 500 is injected, the rear mold insert 150, which moves upward and resets, will contact the second injection material 500 through the protrusion 153, playing an auxiliary ejection role. The spring core 1632 plays a damping and cushioning role in this process, slowing down the rising speed of the rear mold insert 150 and preventing its end protrusion 153 from having a hard collision with the first injection material 400, thereby avoiding breakage or wear of the protrusion 153 and improving the mold life.

[0053] The auxiliary return component 160 applies downward pressure to the rear mold insert 150 through the straight groove 152. After the first injection molding, the auxiliary return component 160 uses the elasticity of the spring core 1632 to force the rear mold insert 150 to move downward by 0.3mm, overcoming the adhesion resistance between the first injection material 400 and the protrusion 153. During the second injection molding, the auxiliary return component 160 further drives the rear mold insert 150 to move downward by 0.3mm, ensuring that the protrusion 153 accurately retracts from the structural hole. This solves the problem of existing molds relying on natural gravity or spring 131 for reset, but the adhesion resistance often causes the rear mold insert 150 to jam and the retraction distance to be inaccurate. The auxiliary forced retraction mechanism of this invention provides a stable downward force through the elastic body 163, ensuring that the rear mold insert 150 can accurately reset every time. It realizes the wrapping of the rear mold side structure with two-color material, avoids product tearing and filling defects, and expands product design possibilities, such as the sealing and aesthetic requirements of heart rate lenses.

[0054] First injection molding 400: In the initial state, the molding surface of the rear mold insert 150 is flush with that of the rear mold core (the structure of the first injection rear mold 120 and the second injection rear mold 220 is the same), see attached. Figure 14When the first pre-mold 110 closes, the first longitudinal spade base 112 drives the horizontal slider 130 and the first horizontal spade base 140 to move inward (or toward the rear mold core). The first horizontal spade base 140 drives the rear mold insert 150 to move upward by 0.3mm through the inclined groove 151. Under the action of the straight groove 152, the second horizontal spade base 162 rises synchronously by 0.3mm against the elastic force of the second spring core 1632. During this process, the second spring core 1632 plays a damping and buffering role, which can prevent the protrusion 153 at the end of the rear mold insert 150 from breaking when it contacts the first pre-mold core 111. At this time, glue is injected between the first pre-mold core 111 and the first rear mold core 121 through the injection port. After cooling, a layer forms between the upper and lower lens inserts 180 and the rear mold insert 150. The first ejector material 400 is made of transparent PC material. The protrusion 153 at the end of the rear mold insert 150 forms a structural hole on the surface of the first ejector material 400. After the first ejector mold 110 is lifted, the spring 131 drives the horizontal slider 130 and the first horizontal shovel base 140 to reset. The downward elastic force of the spring core 1632 drives the rear mold insert 150 to move downward through the second horizontal shovel base 162 and the straight groove 152. By using the downward elastic force to force the rear mold insert 150 to move downward, the resistance caused by the adhesion between the first ejector material 400 and the protrusion 153 can be prevented from hindering the natural fall of the rear mold insert 150. It should be noted that due to the limitation of the first horizontal shovel base 140, there is still a 0.3mm displacement space below the second horizontal shovel base 162 and the guide rail 1611 inside the core shell 161.

[0055] The second injection material 500 is formed: the rotary mold 300 controls the rear mold carrying the first injection material 400 to move below the second injection front mold 210. When the second injection front mold 210 closes, the second longitudinal spade base 212 drives the horizontal slider 130 and the first horizontal spade base 140 to move outward. The first horizontal spade base 140 can control the rear mold insert 150 to continue moving downward by 0.3mm through the inclined groove 151. When the first horizontal spade base 140 and the inclined groove 151 cannot directly move due to wear... When the rear mold insert 150 moves downwards precisely, the downward elastic force of the spring core 1632 can assist in driving the rear mold insert 150 to move downwards by 0.3mm through the second horizontal shovel base 162 and the straight groove 152. The second horizontal shovel base 162 contacts the guide rail 1611 inside the core shell 161 below. The longitudinal limit of the second horizontal shovel base 162 below the guide rail 1611 is used to ensure the accuracy of the downward movement distance. At this time, the protrusion 153 at the top of the rear mold insert 150 is ejected from the first injection material. By withdrawing a certain distance within the 400 structural hole and using downward elastic force to force the rear mold insert 150 to move downward, the accuracy of the retraction distance of the rear mold insert 150 can be ensured. When filling the glue position through the mold, it can not only fill the glue position on the appearance surface of the front mold (the side of the first injection 400 near the front mold) but also fill a portion of the glue position (structural hole) of the rear mold (the side of the first injection 400 near the rear mold). This invention achieves two opposite actions in the first injection rear mold 120 and the second injection rear mold 220 during the mold closing process through two different first longitudinal shovel bases 112 and 212 in the first injection front mold 110 and the second injection front mold 210. With the precise forced retraction of the auxiliary positioning component 160, it not only realizes the special overmolding product that can not only fill the glue position on the appearance surface of the front mold but also fill a portion of the glue position of the rear mold in the second injection, but also improves the product quality by improving the retraction accuracy, and has the characteristics of precision and efficiency.

[0056] In summary, this invention not only achieves simultaneous filling of the front mold appearance area and part of the rear mold area to produce special overmolded products, but also, through the forced downward pressure and buffering effect of the auxiliary positioning component 160, even if the first horizontal shovel base 140 is worn, the second horizontal shovel base 162 can force the rear mold insert 150 to move downward by 0.3mm, overcoming the adhesion resistance between the first injection material 400 and the protrusion 153 of the rear mold insert 150, ensuring the reliable reset of the rear mold insert 150, and avoiding jamming or incomplete reset caused by adhesion. Furthermore, during the mold closing process, the damping and buffering effect of the spring core 1632 can slow down the rising speed of the rear mold insert 150, preventing its end protrusion 153 from having a hard collision with the first injection mold core 111, thereby avoiding breakage or wear of the protrusion 153 and improving the mold life.

[0057] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency dual-color mold for processing heart rate lenses in smartwatches, comprising a first injection mold (100) and a second injection mold (200), wherein the first injection mold (100) comprises a first pre-injection mold (110) and a first post-injection mold (120), and the second injection mold (200) comprises a second pre-injection mold (210) and a second post-injection mold (220), wherein the first pre-injection mold (110) comprises a first pre-injection mold core (111) and a first longitudinal shovel base (112), the second pre-injection mold (210) comprises a second pre-injection mold core (211) and a second longitudinal shovel base (212), and the first post-injection mold (120) and the second post-injection mold (220) respectively comprise a first post-injection mold core (121) and a second post-injection mold core (221), characterized in that, The wedge-shaped surfaces of the first longitudinal shovel base (112) and the second longitudinal shovel base (212) are in opposite positions. Lens inserts (180) are fixedly provided on both the first post-injection die core (121) and the second post-injection die core (221). The first post-injection die (120) and the second post-injection die (220) also include: A horizontal slider (130) is provided with two sets of opposite wedge-shaped surfaces. The first longitudinal shovel base (112) and the second longitudinal shovel base (212) can slide in contact with the two sets of opposite wedge-shaped surfaces respectively. A spring (131) is provided between the first post-injection mold core (121) and the horizontal slider (130), between the second post-injection mold core (221) and the horizontal slider (130), and between the horizontal slider (130) and the limiting member (170). A first horizontal shovel base (140) is embedded below a horizontal slider (130); A limiting member (170) is fixedly installed on the first post-injection mold (120) and the second post-injection mold (220); A rear mold insert (150) is movably fitted onto the surface of the lens insert (180). The surface of the rear mold insert (150) is provided with a straight groove (152) and an inclined groove (151) from top to bottom. The first horizontal shovel base (140) can slide in contact with the inclined groove (151). A protrusion (153) is provided at the top of the rear mold insert (150). The receiving groove (1211) is provided on the back of the first post-injection mold core (121) and the second post-injection mold core (221), and the rear mold insert (150) and the lens insert (180) both pass through the receiving groove (1211); An auxiliary positioning component (160) is provided in the receiving groove (1211). The auxiliary positioning component (160) can apply downward pressure to the rear mold insert (150) through the straight groove (152) to prevent the rear mold insert (150) from being stuck to the first injection material (400) in the first injection mold core (121).

2. The high-efficiency two-color mold for processing heart rate lenses in smartwatches according to claim 1, characterized in that, The auxiliary positioning component (160) includes a core shell (161), a second horizontal shovel base (162), and an elastic body (163). The core shell (161) is fixedly disposed in the receiving groove (1211). The second horizontal shovel base (162) is slidably disposed in the core shell (161). The elastic body (163) is disposed at one end of the core shell (161) and slides in contact with the second horizontal shovel base (162). The second horizontal shovel base (162) can enter the straight groove (152).

3. The high-efficiency two-color mold for processing heart rate lenses in smartwatches according to claim 2, characterized in that, The core shell (161) is provided with a guide rail (1611) at one end near the second horizontal shovel base (162), and the second horizontal shovel base (162) can slide horizontally and longitudinally within the guide rail (1611).

4. The high-efficiency two-color mold for processing heart rate lenses in smartwatches according to claim 3, characterized in that, A spring core (1621) is provided between the second horizontal shovel base (162) and the core shell (161), and the spring core (1621) is used to drive the second horizontal shovel base (162) into the straight groove (152).

5. A high-efficiency two-color mold for processing heart rate lenses in smartwatches according to claim 4, characterized in that, The elastomer (163) includes an end cap (1631), a second spring core (1632), and a limiting rod (1633). The second spring core (1632) is connected between the end cap (1631) and the core shell (161). The end cap (1631) is fixedly connected to the limiting rod (1633). The limiting rod (1633) slides in contact with the inner side of the core shell (161). The upper part of the second horizontal shovel base (162) contacts the surface of the end cap (1631). The second spring core (1632) is used to apply downward pressure to the rear mold insert (150) through the second horizontal shovel base (162).

6. A high-efficiency two-color mold for processing heart rate lenses in smartwatches according to claim 5, characterized in that, The first post-injection mold (120) and the second post-injection mold (220) are also fixedly provided with a stop bar (190), and the horizontal slider (130) slides in contact with the stop bar (190).

7. The high-efficiency two-color mold for processing heart rate lenses in smartwatches according to claim 1, characterized in that, It also includes a rotating mold (300), wherein the first post-injection mold (120) and the second post-injection mold (220) are both fixedly disposed on the surface of the rotating mold (300).

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