Two-color encapsulation mold for swimming goggles

Abstract

The present application relates to injection mold technical field, especially in a kind of swimming goggles two-color encapsulation mold.The mold includes upper die, lower die and be located between upper die and lower die slider, the sliding direction of slider is perpendicular to opening direction, further include swing ejection mechanism;The swing ejection mechanism includes swing piece, nozzle ejector pin, swing piece can swing around horizontal axis;The upper end of nozzle ejector pin is slidably arranged in the slider, and its lower end is rotatably connected with swing piece;When the slider moves along its sliding direction, it drives the upper end of nozzle ejector pin synchronous horizontal movement, to drive the swing piece swing around the horizontal axis, the swing piece swings and drives the nozzle ejector pin to produce upward ejection displacement, to eject the head.The present application effectively solves the technical problem that slider core-pulling and head ejection need to be carried out in sequence in the prior art, leading to long mold opening cycle, low production efficiency.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to a two-color overmolding mold for swimming goggles. Background Technology

[0002] Overmolding of swimming goggles refers to a multi-step injection molding process that sequentially bonds plastic materials with different properties to the surface of optical lenses and subsequently molded rigid plastic (such as polycarbonate) outer frames, forming an integrated component that combines structural strength with a soft touch. Currently, the mainstream overmolding materials in the industry are TPE (thermoplastic elastomer) and LSR (liquid silicone rubber). There are two main methods for overmolding production: two-stage injection molding (using two sets of molds to complete the process in steps) and two-color injection molding (forming the entire process in one machine).

[0003] For example, patent document CN111452289B discloses a vertical dual-color overmolding mold for swimming goggles and its overmolding method. The mold includes an upper mold, a lower mold, and a lifting assembly. The upper mold has independent first and second inlets, as well as a first and second hot runner. The lower mold includes a first ejector block with two vertical through holes and a second ejector block located within the two through holes to support the lenses. A first mold cavity and a second mold cavity are formed between the first and second ejector blocks, distributed vertically. The first mold cavity connects to the first hot runner to form the outer frame of the swimming goggles, while the second mold cavity surrounds the second ejector block and connects to the second hot runner to form the goggles' sealing gasket. The lifting assembly abuts against the first ejector block via a first ejector pin to drive the first ejector block to move up and down, and abuts against the second ejector block via a second ejector pin to drive the second ejector block to move up and down, thereby achieving sequential demolding or independent ejection of the different mold cavities.

[0004] However, the above-mentioned molds and existing molds used for producing swimming goggles still have the following problems in actual use: 1. The above molds are only equipped with a single slider structure. When it is necessary to form deep patterns or shapes on the surface of the outer frame, the movement direction of the slider is unidirectional during demolding, which can easily damage the product due to undercutting and cannot meet the molding requirements of deep patterns; 2. Swimming goggle sealing gaskets are usually made of soft TPE material, which has a large friction with the mold surface during demolding. Single slider demolding is a forced demolding, which will pull on the glue already covered on the rigid frame, resulting in defects such as the glue layer being pulled apart and falling off; 3. During the mold opening process of existing molds, it is necessary to follow the sequence of first driving the slider to move laterally to complete the core pulling, and then using the sprue ejector pin to push the sprue head and product upward. The two actions cannot be overlapped, resulting in a long single molding cycle and restricting production efficiency. Summary of the Invention

[0005] This invention provides a two-color overmolding mold for swimming goggles, which solves the technical problem that in the prior art, the slider core pulling and the material head ejection must be performed sequentially, resulting in a long mold opening cycle and low production efficiency.

[0006] To solve the above problems, the swimming goggle dual-color overmolding mold provided by the present invention adopts the following technical solution: A two-color overmolding mold for swimming goggles includes an upper mold, a lower mold, and a slider disposed between the upper mold and the lower mold. The sliding direction of the slider is perpendicular to the mold opening direction. It also includes a swing ejection mechanism. The swing ejection mechanism includes a swing element and a sprue ejector pin. The swing element can swing around a horizontal axis. The upper end of the sprue ejector pin is slidably inserted into the slider, and its lower end is rotatably connected to the swing element. When the slider moves along its sliding direction to pull the core, it drives the upper end of the sprue pin to move horizontally in sync, thereby driving the swinging component to swing around the horizontal axis. When the swinging component swings, it drives the sprue pin to generate an upward ejection displacement, thereby ejecting the material head.

[0007] Beneficial effects: By setting up a swing ejection mechanism including a swinging component and a sprue ejector pin, and slidably inserting the upper end of the sprue ejector pin into the slider, while its lower end is rotatably connected to the swinging component, when the slider slides perpendicular to the mold opening direction to achieve core pulling and lateral undercutting away from the product, the upper end of the sprue ejector pin, being slidably inserted into the slider, forms a synchronous motion relationship with the slider in the horizontal direction. That is, the horizontal movement of the slider will drive the upper end of the sprue ejector pin to move horizontally synchronously. This horizontal displacement, through the rotatable connection between the lower end of the sprue ejector pin and the swinging component, drives the swinging component to swing around the horizontal axis. During the swinging process, the connection point between the swinging component and the sprue ejector pin generates a vertically upward component force while producing a horizontal displacement, thereby driving the sprue ejector pin to move upward and achieving the ejection of the sprue head.

[0008] Since the ejection action of the sprue ejector pin is directly driven by the core-pulling action of the slider, the core-pulling action and the sprue ejection action can be carried out simultaneously. Compared with the existing technology of first pulling the core and then ejecting the sprue, the waiting time and sequence control time between core pulling and sprue ejection are eliminated, the mold opening cycle is shortened, and the production efficiency is improved.

[0009] Furthermore, the top of the swing member is provided with a first mounting groove, and the lower end of the sprue pin is located in the first mounting groove and is rotatably connected to the two side walls of the first mounting groove.

[0010] Beneficial effects: By opening a first mounting groove on the top of the swinging component and placing the lower end of the sprue ejector pin in the mounting groove and rotatably connecting it with the two side walls of the mounting groove, a stable clamping hinge structure is formed, which restricts the lateral swing of the sprue ejector pin in the horizontal direction, so that it can only rotate around its rotation axis, thus ensuring the transmission accuracy of the ejection displacement.

[0011] Furthermore, the top of the swinging component is provided with two spaced-apart first mounting slots, and each first mounting slot is rotatably installed with a sprue ejector pin so as to eject two material heads simultaneously during one swing.

[0012] Beneficial effect: By arranging two first mounting slots at intervals on the top of the swinging component, and rotating and installing a sprue ejector pin in each mounting slot, two material heads can be ejected simultaneously during one swing of the swinging component, thus improving the efficiency of material head ejection.

[0013] Furthermore, the lower mold includes a base plate, and the swinging member is rotatably mounted on the base plate.

[0014] Beneficial effects: As the basic support component at the bottom of the mold, the base plate has high rigidity and stability. Rotating the swing component onto the base plate can provide a stable fulcrum for the swinging motion of the swing component, effectively avoiding swaying or displacement caused by the swing component being suspended or mounted on a weaker component, thereby ensuring the swinging accuracy of the swing component around the horizontal axis.

[0015] Furthermore, a support base is installed on the base plate, and a second mounting groove is provided on the top of the support base. The bottom end of the swing member is located in the second mounting groove and is rotatably connected to the two side walls of the second mounting groove.

[0016] Beneficial effects: On the one hand, the support base, as an intermediate transition component, can raise the rotation fulcrum of the swing component, bringing the connection position between the sprue ejector pin and the swing component closer to the working area of ​​the mold, shortening the transmission path and reducing motion errors or delays caused by long-distance transmission. On the other hand, the second mounting groove on the support base forms a double-side-wall rotatable connection with the bottom end of the swing component, providing a stable and precise swing axis for the swing component; moreover, the use of an independent support base facilitates processing and repair. If the support base is worn or damaged, only the support base needs to be replaced without re-grinding the entire base plate, reducing maintenance costs and downtime.

[0017] Furthermore, the bottom of the swing member has two rotating connecting parts, and the top of the support base has two spaced-apart second mounting grooves, with the two rotating connecting parts respectively located in the two second mounting grooves.

[0018] Beneficial effects: By setting two rotating connecting parts at the bottom of the swinging part and opening two spaced second mounting grooves on the top of the support base corresponding to the two rotating connecting parts, a double-support rotating support structure is formed. When the sprue pin is subjected to ejection resistance from above, the double-support rotating support structure can jointly bear the load, avoiding the swaying or swinging that may occur in a single-support structure.

[0019] Furthermore, the slider is provided with an inclined guide post, the upper end of which is fixed to the upper mold, and the lower end of which passes through the slider. When the mold is opened, the inclined guide post moves with the upper mold to drive the slider to slide along its sliding direction.

[0020] Beneficial effects: On the one hand, the upper end of the inclined guide post is fixed to the upper mold, and the lower end passes through the slider. This allows the upward movement of the upper mold during mold opening to be converted into the horizontal sliding of the slider through the inclined surface of the guide post. This achieves linkage between the core-pulling action and the mold opening action, eliminating the need for an additional power source (such as a hydraulic cylinder or pneumatic cylinder). The slider can be driven solely by the mold opening force of the injection molding machine itself, simplifying the mold structure and reducing manufacturing costs. On the other hand, the sliding fit between the inclined guide post and the slider means that when the inclined guide post rises with the upper mold, its inclined surface generates a lateral thrust on the slider. The core-pulling speed is proportional to the mold opening speed, resulting in smooth movement and easy control of the core-pulling rhythm by adjusting the mold opening speed. Furthermore, the arrangement of the inclined guide post fixed to the upper mold and passing through the slider automatically pushes the slider back to the molding position during mold closing, achieving a reset function without the need for an additional reset mechanism.

[0021] Furthermore, the upper mold includes an upper template and an inclined guide post fixing seat fixedly installed on the upper template, with the upper end of the inclined guide post fixedly installed on the inclined guide post fixing seat.

[0022] Beneficial effects: By installing inclined guide column fixing seats on the upper template, the upper end of the inclined guide column is fixedly installed on the inclined guide column fixing seats. Using the inclined guide column fixing seats as adapters avoids directly machining the inclined guide column mounting holes on the upper template, reducing the machining difficulty of the upper template. When the inclined guide column is worn or broken due to long-term use, only the inclined guide column fixing seats need to be replaced or repaired, without the need to replace or repair the entire upper template, reducing maintenance costs and downtime.

[0023] Furthermore, the slider is provided with two spaced-apart inclined guide posts.

[0024] Beneficial effects: By installing two spaced-apart angled guide pillars on the slider, the two guide pillars jointly drive the slider, ensuring that the lateral thrust on the slider during core pulling is evenly distributed across two force points. This avoids the slider deflection or tilting that can easily occur with a single angled guide pillar, thus guaranteeing the straightness and stability of the slider's movement along its sliding direction. Furthermore, the spaced-apart arrangement of the two angled guide pillars allows them to share the bending stress generated by the mold opening force, reducing the stress on a single guide pillar and helping to lower the risk of fatigue fracture.

[0025] Furthermore, there are two sliders, which are located on opposite sides of the cavity formed by the upper mold and the lower mold.

[0026] Beneficial effects: On the one hand, the two opposing sliders can simultaneously pull the core from both sides of the product, ensuring that the core-pulling forces from symmetrical directions are balanced during demolding. This avoids the product being pulled to one side due to uneven force during single-sided core pulling, thus preventing twisting, deformation, or localized tearing. On the other hand, the two sliders are respectively positioned on opposite sides of the cavity, exiting in opposite directions during mold opening without interfering with each other. This allows for the simultaneous molding of complex structures such as deep ribs, snap-fits, and sealing grooves that were previously impossible to demold on opposite sides of the product. A single mold can complete the integrated molding of functional features on both sides, effectively improving the freedom of product design and the process range of the mold.

[0027] The beneficial effects of the swimming goggle dual-color overmolding mold provided by this invention are: 1. By setting up a swing ejection mechanism including a swinging component and a sprue ejector pin, and slidably inserting the upper end of the sprue ejector pin into the slider and rotating the lower end to the swinging component, when the slider slides perpendicular to the mold opening direction to pull the core, the horizontal movement of the slider drives the upper end of the sprue ejector pin to move horizontally synchronously, which in turn drives the swinging component to swing around the horizontal axis through the rotational connection. During the swinging process, the connection point between the swinging component and the sprue ejector pin generates an upward vertical force, pushing the sprue ejector pin to eject the sprue head upward. Since the ejection action of the sprue ejector pin is directly driven by the core-pulling movement of the slider, the two can be carried out synchronously, eliminating the sequential waiting time of pulling the core first and then ejecting the sprue head, shortening the mold opening cycle, and improving production efficiency.

[0028] 2. By installing a support base on the base plate, the bottom end of the swing component is rotatably mounted on the support base. Using the support base as a transition component, the rotation fulcrum of the swing component can be raised, bringing the connection between the sprue ejector pin and the swing component closer to the working area of ​​the mold, thereby shortening the transmission path and reducing motion errors and delays. Simultaneously, the second mounting groove on the support base forms a double-side-wall rotatable connection with the bottom end of the swing component, ensuring the stability and accuracy of the swing axis. Furthermore, the independent support base is easy to machine and repair; after wear, only the support base needs to be replaced without re-grinding the base plate, reducing maintenance costs and downtime.

[0029] 3. The upper end of the inclined guide post is fixed to the upper mold, and its lower end passes through the slider. This allows the upward movement of the upper mold during mold opening to be converted into the horizontal sliding of the slider via the inclined surface, thus achieving linkage between core pulling and mold opening. No additional power source is needed; the slider can be driven solely by the mold opening force, simplifying the mold structure and reducing costs. Through the sliding cooperation between the inclined guide post and the slider, the lateral thrust of the inclined guide post on the slider is proportional to the mold opening speed, resulting in smooth core pulling with controllable rhythm. Furthermore, during mold closing, the inclined guide post automatically pushes the slider back to the forming position, eliminating the need for a separate reset mechanism.

[0030] 4. By setting two opposing sliders to simultaneously pull the core from both sides of the product, the core-pulling forces in the symmetrical directions are balanced during demolding, avoiding the uneven force that easily occurs with single-sided core pulling and the resulting twisting, deformation, or tearing. Simultaneously, the two sliders are located on opposite sides of the cavity, retracting in opposite directions during mold opening without interfering with each other. This allows for the simultaneous molding of complex structures such as deep ribs, snap-fits, and sealing grooves on both sides of the product, which were originally impossible to demold. This enables a single mold to complete the integrated molding of functional features on both sides, effectively improving product design freedom and the range of mold processes.

[0031] In summary, the present invention effectively solves the technical problem that in the prior art, the slider core pulling and the material head ejection must be performed sequentially, resulting in a long mold opening cycle and low production efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the two-color overmolded mold for swimming goggles provided by the present invention; Figure 2 for Figure 1 The top view of the two-color overmolded mold for swimming goggles shown; Figure 3 for Figure 2 Sectional view of AA in the middle; Figure 4 for Figure 2 Cross-sectional view of the middle section (BB); Figure 5 for Figure 2 CC section view; Figure 6 for Figure 2 Cross-sectional view of DD in the middle; Figure 7 for Figure 6 A magnified view of a portion of point A in the middle; Figure 8 This is a schematic diagram of the structure of the lower mold provided by the present invention; Figure 9 A schematic diagram of a swing ejection mechanism provided by the present invention; Figure 10 This is a schematic diagram of another structure of the swing ejection mechanism provided by the present invention.

[0033] Explanation of reference numerals in the attached figures: 1. Upper mold; 11. Upper template; 12. Angled guide post fixing seat; 13. First injection port; 14. Second injection port; 2. Lower mold; 21. Lower template; 22. Base plate; 23. Support seat; 24. Ejector pin base plate; 25. Ejector pin panel; 26. Demolding ejector pin; 27. Ejector block; 3. Slider; 31. Angled guide post; 32. Cooling water channel; 4. Swinging ejection mechanism; 41. Swinging component; 411. Rotating connection part; 42. Sprue ejector pin; 5. Sprue head; 6. Lens; 7. Core; 8. First pack of plastic material; 9. Second pack of plastic material. Detailed Implementation

[0034] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0035] An embodiment of the two-color overmolded swimming goggle mold provided by the present invention: like Figures 1 to 10 As shown, the two-color overmolding mold for swimming goggles includes an upper mold 1, a lower mold 2, a slider 3 located between the upper mold 1 and the lower mold 2, and a swing ejection mechanism 4. The sliding direction of the slider 3 is perpendicular to the mold opening direction.

[0036] like Figure 3 , Figure 9 and Figure 10 As shown, in this embodiment, the swing ejection mechanism 4 includes a swing member 41 and a sprue ejector pin 42. The swing member 41 can swing around a horizontal axis, and the upper end of the sprue ejector pin 42 can be slidably inserted into the slider 3, and its lower end is rotatably connected to the swing member 41.

[0037] like Figure 3 As shown, in this embodiment, there are two swing members 41, which are arranged symmetrically on the left and right sides; as Figure 9 As shown, the top of the left-side swing member 41 is provided with a first mounting groove, and the lower end of the sprue pin 42 is located in the first mounting groove and is rotatably connected to the two side walls of the first mounting groove via a rotating shaft; Figure 10 As shown, the top of the right-side swing member 41 is provided with two spaced-apart first mounting grooves, and a sprue pin 42 is rotatably mounted in each first mounting groove so as to eject two material heads 5 simultaneously during one swing. In other embodiments, the lower end of the sprue pin 42 is provided with a ball head, and the top of the swing member 41 is provided with a ball socket adapted to the ball head. The sprue pin 42 is rotatably connected to the swing member 41 through the cooperation of the ball head and the ball socket.

[0038] In this embodiment, a rotating shaft passing through the two first mounting slots and the two sprue pins 42 enables the rotational connection between the two sprue pins 42 and the corresponding first mounting slots.

[0039] In other embodiments, the left swing member 41 and the right swing member 41 have the same structure, and each of the two swing members 41 has one or more first mounting slots on its top.

[0040] like Figures 3 to 6 As shown, in this embodiment, the lower mold 2 includes a lower mold 2 plate and a base plate 22, and the swing member 41 is rotatably mounted on the base plate 22. Specifically, as shown... Figure 3 and Figure 5 As shown, a base plate 24 is placed on the base plate 22. A pin panel 25 is fixedly installed on the base plate 24 by bolts. The pin panel 25 has a mounting hole for mounting a support base 23. The bottom end of the support base 23 passes through the mounting hole and is fixed to the base plate 24 by bolts. The top of the support base 23 has a second mounting groove. The bottom end of the swing member 41 is located in the second mounting groove and is rotatably connected to the two side walls of the second mounting groove.

[0041] like Figure 3 and Figure 5 As shown, in this embodiment, the center of the ejector plate 25 is provided with a mounting hole for installing the demolding ejector pin 26. The bottom end of the demolding ejector pin 26 passes through the mounting hole and is fixed to the ejector base plate 24 by bolts. The upper end of the demolding ejector pin 26 passes through the lower mold plate 21 and extends into the cavity. An ejector block 27 is also installed on the upper end of the demolding ejector pin 26, and the ejector block 27 abuts against the bottom surface of the lens 6. During demolding, the ejector base plate 24 is pushed upward by the ejector rod of the injection molding machine to drive the ejector plate 25 and the demolding ejector pin 26 to move upward, and finally drive the ejector block 27 to move upward to eject the product containing the lens 6. The ejector base plate 24, ejector plate 25, demolding ejector pin 26 and ejector block 27 can also be reset by the retraction of the ejector rod of the injection molding machine.

[0042] like Figure 3 and Figure 5 As shown, the support base 23, the swing member 41 mounted on the support base 23, and the sprue ejector pin 42 mounted on the swing member 41 are all located beside the demolding ejector pin 26 to avoid interference between the movement of the demolding ejector pin 26 and the sprue ejector pin 42.

[0043] In other embodiments, the swing member 41 is rotatably mounted on the lower surface of the lower mold plate 2. Specifically, the lower surface of the lower mold plate 2 has a receiving groove, and the support base 23 is fixedly mounted in the receiving groove. The bottom end of the swing member 41 is rotatably mounted on the support base 23, and its top end extends upward and is rotatably connected to the lower end of the sprue ejector pin 42. The rotatable mounting of the swing member 41 on the lower surface of the lower mold plate 2 can shorten the lever arm of the swing member 41, reduce the amount of deformation during the swing process, and thus improve the ejection accuracy of the sprue ejector pin 42. In addition, the swing ejection mechanism 4 is located entirely below the lower mold plate 2, without occupying the installation space of the ejector plate assembly between the bottom plate 22 and the lower mold plate 2, which facilitates the layout of the ejector plate assembly.

[0044] like Figure 3 As shown, in this embodiment, there are two support bases 23, which are arranged symmetrically on the left and right sides and correspond to the two swinging members 41; as Figure 9 As shown, the top of the support base 23 on the left side is provided with a second mounting groove, and the bottom end of the swing member 41 has a rotating connection part 411, which is rotatably connected to the two side walls of the second mounting groove via a rotating shaft; as shown Figure 10 As shown, the top of the support base 23 on the right side is provided with two spaced-apart second mounting grooves, and the bottom of the swing member 41 has two rotating connecting parts 411, which are respectively disposed in the two second mounting grooves. In other embodiments, the bottom end of the swing member 41 is provided with a ball head, and the top of the support base 23 is provided with a ball socket adapted to the ball head. The swing member 41 forms a rotating connection with the support base 23 through the cooperation of the ball head and the ball socket; or, the bottom end of both rotating connecting parts 411 is provided with a ball head, and the top of the support base 23 is provided with two spaced-apart ball sockets to adapt to the two ball heads, thereby realizing the rotating connection between the swing member 41 and the support base 23.

[0045] In this embodiment, a rotating shaft passing through the two second mounting slots and the two rotating connecting parts 411 achieves the rotating connection between the two rotating connecting parts 411 and the corresponding second mounting slots.

[0046] In other embodiments, the left support 23 and the right support 23 have the same structure, and each of the two support 23 has one or more second mounting slots on its top.

[0047] like Figure 4 and Figure 8 As shown, in this embodiment, a slanted guide post 31 is provided on the slider 3. The upper end of the slanted guide post 31 is fixedly installed on the upper mold 1, and its lower end passes through the slider 3. The slanted guide post 31 moves with the upper mold 1 when the mold is opened, so as to drive the slider 3 to slide along its sliding direction.

[0048] Specifically, such as Figure 4 As shown, in this embodiment, the upper mold 1 includes an upper template 11 and an inclined guide post fixing seat 12 fixedly installed on the upper template 11, and the upper end of the inclined guide post 31 is fixedly installed on the inclined guide post fixing seat 12.

[0049] like Figure 8 As shown, in this embodiment, each slider 3 is provided with two spaced-apart inclined guide posts 31.

[0050] like Figure 3 , Figure 4 , Figure 5 as well as Figure 8As shown, in this embodiment, there are two sliders 3, which are located on the left and right sides of the cavity formed by the upper template 11, the lower template 21, and the core 7. In other embodiments, there is one slider 3, or three or four sliders 3.

[0051] In addition, such as Figure 5 As shown, in this embodiment, a cooling water channel 32 is provided inside the slider 3, so as to control the temperature of the slider 3 and the mold area of ​​the slider 3 by passing cooling water into the cooling water channel 32, and prevent the product from sticking to the mold or deforming due to local overheating.

[0052] It should be noted that, as Figure 1 , Figure 6 and Figure 7 As shown, in this embodiment, the upper mold 1 has a first injection port 13 and a second injection port 14 to simultaneously form the first package of rubber material 8 and the second package of rubber material 9 in the cavity. During injection molding, the lens 6 is first placed in the cavity, and then the raw material of the first package of rubber material 8 is injected through the first injection port 13, and the raw material of the second package of rubber material 9 is injected through the second injection port 14, finally forming a product including the lens 6, the first package of rubber material 8, and the second package of rubber material 9. The colors of the lens 6, the first package of rubber material 8, and the second package of rubber material 9 can be the same or different.

[0053] The working principle of the swimming goggle dual-color overmolding mold provided by this invention is as follows: In the mold-closed state, the upper mold 1 and lower mold 2 are closed, the inclined guide post 31 passes through the slider 3, the slider 3 is in the molding position, the upper end of the sprue ejector pin 42 is located inside the slider 3, and the lower end is rotatably connected to the swing member 41. The swing member 41 is mounted on the base plate 22 through the support seat 23. After injection molding is completed, the mold enters the mold-opening stage. The upper mold 1 moves upward, and the inclined guide post 31 fixed to the upper mold 1 moves upward accordingly. Since the inclined guide post 31 is engaged with the inclined hole on the slider 3, the upward movement of the inclined guide post 31 forces the slider 3 to slide outward in the horizontal direction (perpendicular to the mold-opening direction), and the core-pulling action begins, so that the slider 3 gradually separates from the undercut structure on the side of the product.

[0054] During the horizontal movement of the slider 3, the upper end of the sprue pin 42, which is inserted inside the slider 3, is driven by the slider 3 and generates a horizontal displacement synchronously. Since the lower end of the sprue pin 42 is rotatably connected to the swing member 41, the horizontal movement of the sprue pin 42 will drive the swing member 41 to swing around its bottom horizontal axis. When the swing member 41 swings, the height of its connection point with the sprue pin 42 changes, thereby driving the sprue pin 42 to move upward and generate ejection displacement.

[0055] When the slider 3 exits the side undercut area of ​​the product and the sprue head 5 has been removed from the mold by the upward movement of the ejector pin 42, the ejector rod of the injection molding machine starts to move, pushing the ejector base plate 24 upward. The ejector plate 25 and the ejector base plate 24 are connected as a whole by bolts and will move upward synchronously with the ejector rod. The bottom end of the demolding ejector pin 26 passes through the mounting hole in the center of the ejector plate 25 and is fixed to the ejector base plate 24 by bolts. Therefore, the demolding ejector pin 26 will move vertically upward together with the ejector base plate 24 and the ejector plate 25, thereby ejecting the product.

[0056] After the product is ejected, the injection molding machine drives the upper mold 1 to close downwards. The inclined guide post 31 descends with the upper mold 1 and re-inserts into the inclined hole on the slider 3, pushing the slider 3 to slide and reset to the inside of the mold. During the reset process of the slider 3, the sprue ejector pin 42 drives the swinging part 41 to swing in the opposite direction, causing the upper end of the sprue ejector pin 42 to retract into the slider 3, waiting for the next injection cycle.

[0057] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "back," "left," "right," "inner," and "outer," which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings of this specification and should not be understood or interpreted as limiting the present invention.

[0058] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A two-tone overmolding mold for swimming goggles, comprising an upper mold, a lower mold, and a slider disposed between the upper and lower molds, wherein the sliding direction of the slider is perpendicular to the mold opening direction, characterized in that, It also includes a swing ejection mechanism; The swing ejection mechanism includes a swing element and a sprue ejector pin. The swing element can swing around a horizontal axis. The upper end of the sprue ejector pin is slidably inserted into the slider, and its lower end is rotatably connected to the swing element. When the slider moves along its sliding direction to pull the core, it drives the upper end of the sprue pin to move horizontally in sync, thereby driving the swinging component to swing around the horizontal axis. When the swinging component swings, it drives the sprue pin to generate an upward ejection displacement, thereby ejecting the material head.

2. The swimming goggle dual-color overmolding mold according to claim 1, characterized in that, The top of the swing member is provided with a first mounting groove, and the lower end of the sprue pin is located in the first mounting groove and is rotatably connected to the two side walls of the first mounting groove.

3. The swimming goggle dual-color overmolding mold according to claim 2, characterized in that, The top of the swinging component is provided with two spaced-apart first mounting slots, and each first mounting slot is rotatably installed with a sprue ejector pin so as to eject two material heads simultaneously during one swing.

4. The swimming goggle two-color overmolding mold according to any one of claims 1 to 3, characterized in that, The lower mold includes a base plate, and the swinging component is rotatably mounted on the base plate.

5. The swimming goggle two-color overmolding mold according to claim 4, characterized in that, A support base is installed on the base plate, and a second mounting groove is provided on the top of the support base. The bottom end of the swinging member is located in the second mounting groove and is rotatably connected to the two side walls of the second mounting groove.

6. The swimming goggle two-color overmolding mold according to claim 5, characterized in that, The bottom of the swing member has two rotating connecting parts, and the top of the support base has two spaced-apart second mounting slots, with the two rotating connecting parts respectively located in the two second mounting slots.

7. The swimming goggle two-color overmolding mold according to any one of claims 1 to 3, characterized in that, The slider is provided with an inclined guide post, the upper end of which is fixed to the upper mold, and the lower end of which passes through the slider. When the mold is opened, the inclined guide post moves with the upper mold to drive the slider to slide along its sliding direction.

8. The swimming goggle two-color overmolding mold according to claim 7, characterized in that, The upper mold includes an upper template and a slanted guide post fixing seat fixedly installed on the upper template, with the upper end of the slanted guide post fixedly installed on the slanted guide post fixing seat.

9. The swimming goggle two-color overmolding mold according to claim 7, characterized in that, The slider is provided with two spaced-apart inclined guide posts.

10. The swimming goggle two-color overmolding mold according to any one of claims 1 to 3, characterized in that, The number of sliders is two, and the two sliders are located on two opposite sides of the cavity formed by the upper mold and the lower mold.

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