Double-injection mold and injection molding device

Abstract

The utility model provides a double-injection mold and an injection molding device. The double-injection mold comprises a first-injection molding mechanism, a second-injection molding mechanism and a movable insert, the movable inserts are alternately arranged in the first injection molding mechanism and the second injection molding mechanism, and the movable inserts are arranged in the first injection molding mechanism to define a first injection mold cavity so as to mold a first injection molding layer of a product; the movable insert is in sliding connection with the secondary injection molding mechanism, and along with sliding of the movable insert, the movable insert and the secondary injection molding mechanism jointly define a secondary injection mold cavity used for molding a second injection molding layer of the product, or the movable insert retreats out of the secondary injection mold cavity, so that the molding cycle of the product is accelerated, and the product quality is improved. And the product size and the product appearance effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a double-shot mold and an injection molding device. Background Art

[0002] With the gradual upgrading of the consumer electronics market, the appearance of products is becoming more and more important. In order to stand out from the competition, we have higher and higher requirements for the appearance of electronic products.

[0003] In the past, for double-shot products, the rear half of the mold had to remain consistent in order to be able to rotate the rear mold for injection molding. This meant that the second shot of the product could not have a barb on the rear mold side, which limited the design of the product's second-shot appearance and put it at a disadvantage in the competition.

[0004] At the same time, ordinary fully encapsulated products are generally produced using the Over mold method. They are generally produced by an injection molding machine after one product is molded, and then this product is placed in the injection molding machine of another product for injection molding. This production method will extend the production cycle of the product, increase production costs, and reduce price efficiency. At the same time, due to the inaccurate positioning of the two products, the product size and product appearance will also be reduced. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a double-shot mold, the purpose of which is to accelerate the molding cycle of the product and improve the product size and product appearance.

[0006] The utility model provides a double-shot mold, comprising a first-shot molding mechanism, a second-shot molding mechanism and a movable insert; the movable insert is alternately arranged in the first-shot molding mechanism and the second-shot molding mechanism, the movable insert is arranged in the first-shot molding mechanism to define a first-shot mold cavity to form a first injection molding layer of a molding product; the movable insert is slidably connected to the second-shot molding mechanism, and as the movable insert slides, the movable insert and the second-shot molding mechanism jointly define a second-shot mold cavity to form a second injection molding layer of a molding product, or the movable insert exits from the second-shot mold cavity.

[0007] In one embodiment, a groove is provided at the bottom edge of the first injection molded layer so that a groove is formed at the bottom edge of the first injection molded layer. The second injection molded layer includes a receiving area and an injection molding area. The injection molding area is superimposed on the receiving area. The receiving area is used to receive the first injection molded layer. The injection molding area is used to mold the second injection molded layer on the first injection molded layer. The injection molding area extends to fill the groove so that the second injection molded layer forms a barb that cooperates with the groove.

[0008] In one embodiment, the two-shot molding mechanism includes a two-shot front mold and a two-shot rear mold, the two-shot front mold, the two-shot rear mold and the movable insert together define the two-shot mold cavity, and the two-shot front mold can expose and close the two-shot mold cavity.

[0009] In one embodiment, the two-shot rear mold is provided with a two-shot connecting groove, and the movable insert is slidably connected to the inner wall of the two-shot connecting groove. As the movable insert slides, the movable insert approaches or moves away from the two-shot mold cavity, and the groove width of the two-shot connecting groove gradually increases in the direction approaching the two-shot mold cavity.

[0010] In one embodiment, the two-shot rear mold is provided with a through hole and a first pressure piece, the two-shot through hole is connected to the two-shot connecting groove, and the first pressure piece is elastically connected to the two-shot through hole to pass through the two-shot through hole and abut against the movable insert in the two-shot connecting groove.

[0011] In one embodiment, the movable insert is provided with a slot for engaging with the first pressing member.

[0012] In one embodiment, the two-shot front mold includes a front mold body and a second pressure piece, the front mold body is used to close the two-shot mold cavity, and the second pressure piece is arranged on a side of the front mold body close to the two-shot rear mold. When the front mold body closes the two-shot mold cavity, the second pressure piece pushes the first pressure piece to be injected into the two-shot connecting groove and abut against the movable insert.

[0013] In one embodiment, the two-shot molding mechanism further includes a two-shot ejection system, the two-shot ejection system includes an ejector roller and a first ejector pin, the movable insert is provided with an ejection hole, the ejection hole is used for the first ejector pin to pass through to abut against the two-shot product, and the ejector roller is used to lift the first ejector pin.

[0014] In one embodiment, the movable insert also includes a vacuum suction system, which includes a suction device, an air circuit and an inserting needle. The air circuit connects the suction device and the inserting needle. The inserting needle is arranged on the movable insert, and the inserting needle leads to the end of the movable insert for sucking the first injection molding layer.

[0015] The utility model also provides an injection molding device, comprising a manipulator and the double-shot mold as described above, wherein the manipulator is used to clamp the movable insert and place the movable insert in the one-shot molding mechanism or the two-shot molding mechanism.

[0016] The double-shot mold provided by the utility model defines a single-shot mold cavity by embedding a movable insert in a single-shot molding mechanism. After the first injection molding layer is completed, the movable insert carries the first injection molding layer and moves into the second-shot molding mechanism. The movable insert is slidably connected in the second-shot molding mechanism. By sliding the position of the movable insert, the movable insert can define a second-shot mold cavity with the second-shot molding mechanism, and the movable insert can also be slid out of the second-shot molding mechanism to eject the finished product of the second injection molding layer. The setting of the movable insert avoids the positioning problem of single-shot and double-shot products, and the molding cycle of the product is also very fast, which greatly improves the production efficiency and saves the production cost. At the same time, the degree of freedom of the two-shot mold is increased, thereby freeing the design restrictions of the product size and product appearance, so that the appearance of the second injection molding layer is no longer limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the first shot product molding structure of a two-shot mold in the prior art.

[0019] Figure 2 for Figure 1 Schematic diagram of the second shot product molding structure of the two-shot mold in the prior art.

[0020] Figure 3 Reason Figure 1 Schematic diagram of the structure of a two-shot product obtained by two-shot mold molding in the prior art.

[0021] Figure 4 A schematic diagram of the three-dimensional structure of the double-shot mold in the first embodiment of the present invention.

[0022] Figure 5 for Figure 4 Schematic diagram of the internal three-dimensional structure of the double-shot mold.

[0023] Figure 6 for Figure 4 Schematic diagram of the top view of the double-shot mold.

[0024] Figure 7 for Figure 6 Schematic diagram of the structure of section B.

[0025] Figure 8 for Figure 7 Schematic diagram of the structure of the D section.

[0026] Fig. 9 for Figure 6 Schematic diagram of the structure of section C in the middle.

[0027] Fig.10 for Figure 4 Schematic diagram of the partial structure of the first-shot molding mechanism.

[0028] Fig.11 Reason Figure 4 The double shot product is obtained by double shot moulding.

[0029] Fig.12 for Figure 4 Schematic diagram of the structure of the middle two-shot ejection system.

[0030] Fig.13 for Fig.12 Schematic diagram of the process structure of the two-shot ejection system ejecting double-shot products.

[0031] Fig.14 for Figure 4 Schematic diagram of the structure of the vacuum suction system.

[0032] Fig.15 for Fig.14 Schematic diagram of the pin arrangement structure of the vacuum suction system.

[0033] Fig.16 for Figure 4 Schematic diagram of the structure of the first shot ejection system.

[0034] Reference numerals: first shot molding mechanism-10; first shot mold cavity-11; groove-111; first shot front mold-12; first shot rear mold-13; first shot connecting groove-131; first shot ejection system-14; second ejector pin-141; support column-142; second shot molding mechanism-20; second shot mold cavity-21; accommodating area-211; injection molding area-212; second shot front mold-22; front mold body-221; second pressing piece-222; second shot rear mold 23; second shot connecting groove-231; second shot through hole-232; first pressing piece-2 33; spring-234; two-shot ejection system-24; ejector roller-241; first ejector pin-242; ejector plate-243; guide column-244; vacuum suction system-40; suction device-41; air path-42; insert pin-43; movable insert-30; slot-31; ejection hole-32; vacuum suction system-40; suction device-41; air path-42; insert pin-43; two-shot product-A; first injection layer-A1; embedding groove-A11; second injection layer-A2; barb A21; undercut-A22. DETAILED DESCRIPTION

[0035] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0038] The terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0039] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0040] First embodiment

[0041] Please refer to Figure 1-Figure 16 One embodiment of the utility model provides a double-shot mold, including a first-shot molding mechanism 10, a second-shot molding mechanism 20 and a movable insert 30; the movable insert 30 is alternately arranged in the first-shot molding mechanism 10 and the second-shot molding mechanism 20, and the movable insert 30 is arranged in the first-shot molding mechanism 10 to define a first-shot mold cavity 11 to mold a first injection molding layer A1 of a product; the movable insert 30 is slidably connected to the second-shot molding mechanism 20, and as the movable insert 30 slides, the movable insert 30 and the second-shot molding mechanism 20 jointly define a second-shot mold cavity 21 for molding a second injection molding layer A2 of the product, or the movable insert 30 exits the second-shot mold cavity 21.

[0042] Specifically, the movable insert 30 is first placed in the first injection molding mechanism 10, and there is a gap between the movable insert 30 and the first injection molding mechanism 10 to form a first injection molding cavity 11, and the first injection molding layer A1 is molded on the movable insert 30 in the first injection molding cavity 11. After the first injection molding layer A1 is completed, the first injection molding layer A1 is moved to the second injection molding mechanism 20 along with the movable insert 30, and there is also a gap between the second injection molding mechanism 20 and the first injection molding layer A1, and is limited to form a second injection molding cavity 21, and the second injection molding layer A2 is molded in the second injection molding cavity 21, so that the second injection molding layer A2 can be stacked on the first injection molding layer A1 and wrap the edge of the first injection molding layer A1, forming a fully encapsulated double-shot product A. Compared with the prior art, the setting of the movable insert 30 ensures that the positioning of the first injection layer A1 remains unchanged during the movement, so that the two-shot molding mechanism 20 can ensure the precise positioning of the first injection layer A1 without being fixed, which avoids the appearance restrictions of the existing two-shot mold on the molding of the two-shot product A and opens up the design ideas of the two-shot product A. Transferring the first injection layer A1 to the two-shot molding mechanism 20 can also avoid the tedious steps of ensuring accurate positioning, thereby shortening the molding cycle of the product, improving production efficiency, and reducing production costs.

[0043] The rear mold of a traditional two-shot mold is fixed, so the rear molds of the first-shot mechanism and the second-shot mechanism can only be completely identical. As a result, the second shot of the product cannot have the barb A21 on the rear mold side, otherwise it cannot be demolded.

[0044] In this embodiment, a groove 111 is provided on the bottom edge of the first injection molded layer A1 so that the bottom edge of the first injection molded layer A1 forms an embedding groove A11. The second injection molded cavity 21 includes a receiving area 211 and an injection molding area 212. The injection molding area 212 is superimposed on the receiving area 211. The receiving area 211 is used to receive the first injection molded layer A1. The injection molding area 212 is used to mold the second injection molded layer A2 on the first injection molded layer A1. The injection molding area 212 extends to fill the groove 111 so that the second injection molded layer A2 forms a barb A21 that cooperates with the embedding groove A11.

[0045] Specifically, since the movable insert 30 in this embodiment is highly flexible, the setting defects of the rear mold are avoided, so that the injection area 212 can extend to the edge of the first injection layer A1 to wrap the visible range of the first injection layer A1, and form an undercut A22 at the edge of the first injection layer A1 to form a fully encapsulated double-shot product A. On this basis, a groove 111 is further provided at the bottom edge of the first injection mold cavity 11 to form an embedding groove A11 for the bottom edge of the first injection layer A1, and the injection area 212 is extended to fill the groove 111, so that the second injection layer A2 forms a barb A21 that cooperates with the embedding groove A11, so that the second injection layer A2 is more firmly and smoothly encapsulated with the first injection layer A1.

[0046] In this embodiment, the two-shot molding mechanism 20 includes a two-shot front mold 22 and a two-shot rear mold 23. The two-shot front mold 22, the two-shot rear mold 23 and the movable insert 30 together define a two-shot mold cavity 21. The two-shot front mold 22 can expose and close the two-shot mold cavity 21.

[0047] Specifically, the second shot front mold 22 can movably cover the second shot mold cavity 21. When the second shot front mold 22 closes the second shot mold cavity 21, the movable insert 30 is fixed in the second shot molding mechanism 20. When the second shot front mold 22 is removed to expose the second shot mold cavity 21, the movable insert 30 can be moved out of the second shot mold cavity 21 or placed in the second shot mold cavity 21.

[0048] In this embodiment, an injection molding mechanism 10 includes a front mold 12 and a rear mold 13. The front mold 12, the rear mold 13 and the movable insert 30 together define a mold cavity 11. The front mold 12 can expose and close the mold cavity 11.

[0049] In this embodiment, the two-shot rear mold 23 is provided with a two-shot connecting groove 231, and the movable insert 30 is slidably connected to the inner wall of the two-shot connecting groove 231. As the movable insert 30 slides, the movable insert 30 approaches or moves away from the two-shot mold cavity 21, and the groove width of the two-shot connecting groove 231 gradually increases along the direction approaching the two-shot mold cavity 21.

[0050] Specifically, the gradually widening design of the two-shot connecting groove 231 makes the inner wall of the two-shot connecting groove 231 equivalent to an inclined surface. When the movable insert 30 is connected to the two-shot connecting groove 231, due to the gradual shrinkage of the groove width of the two-shot connecting groove 231, as the movable insert 30 goes deeper into the two-shot connecting groove 231, the two-shot connecting groove 231 gradually fixes the movable insert 30 to prevent the movable insert 30 from moving back and forth and left and right. At the same time, the inclined surface also plays a guiding role in the sliding process of the movable insert 30, thereby improving the placement convenience of the movable insert 30, speeding up the production speed, and being more suitable for mass production.

[0051] In this embodiment, a rear mold 13 is provided with an injection connection groove, and a movable insert 30 is slidably connected to the inner wall of the injection connection groove. As the movable insert 30 slides, the movable insert 30 approaches or moves away from an injection mold cavity 11, and the groove width of the injection connection groove gradually increases in the direction approaching the injection mold cavity 11.

[0052] In this embodiment, the second-shot rear mold 23 is provided with a second-shot through hole 232 and a first pressing piece 233. The second-shot through hole 232 is connected to the second-shot connecting groove 231. The first pressing piece 233 is elastically connected to the second-shot through hole 232 to pass through the second-shot through hole 232 and abut against the movable insert 30 in the second-shot connecting groove 231.

[0053] Specifically, the first pressing piece 233 passes through the two-shot through hole 232 and is elastically connected to the two-shot through hole 232. When the movable insert 30 is not placed in the two-shot connecting groove 231, the first pressing piece 233 is in a natural state. At this time, the first pressing piece partially passes through the two-shot through hole 232 and is located in the two-shot connecting groove 231. When the movable insert 30 is placed in the two-shot connecting groove 231, the first pressing piece 233 is squeezed by the movable insert 30 and presses against the side of the movable insert 30. The first pressing piece 233 continuously provides a thrust to the movable insert 30 due to the elastic connection to fix the movable insert 30.

[0054] Furthermore, the second-shot through hole 232 is opened obliquely downward toward the second-shot connecting groove 231, so that after the first pressure piece 233 passes through the second-shot through hole 232, it is naturally partially exposed from the second-shot connecting groove 231 due to gravity. The first pressure piece 233 can be connected to the through hole through a spring 234. Due to the elastic effect of the spring 234, the first pressure piece 233 cannot completely pass through the through hole.

[0055] In this embodiment, a shot-through hole and a third pressure piece (not shown in the figure, the structure can refer to the second shot-through mold 23) are formed in a shot-through hole, and a shot-through hole is connected to a shot-connecting groove. The third pressure piece is elastically connected to the shot-through hole to pass through the shot-through hole and abut against a movable insert 30 in the shot-connecting groove.

[0056] In this embodiment, the movable insert 30 is provided with a clamping groove 31 for clamping with the first pressing piece 233 or the third pressing piece.

[0057] Specifically, the movable insert 30 only abuts against the first pressure piece 233 or the third pressure piece and can only be kept fixed by friction. The slot 31 provided on the movable insert 30 can limit the first pressure piece 233 or the third pressure piece. The engaged state can only be released after the first pressure piece 233 or the third pressure piece actively withdraws from the slot 31, thereby further improving the stability of the movable insert 30.

[0058] In this embodiment, the two-shot front mold 22 includes a front mold body 221 and a second pressure piece 222. The front mold body 221 is used to close the two-shot mold cavity 21. The second pressure piece 222 is arranged on one side of the front mold body 221 close to the two-shot rear mold 23. When the front mold body 221 closes the two-shot mold cavity 21, the second pressure piece 222 pushes the first pressure piece 233 to be injected into the two-shot connecting groove 231 and abuts against the movable insert 30.

[0059] Specifically, after the two-shot front mold 22 and the two-shot rear mold 23 are molded together, the front mold body 221 closes the two-shot mold cavity 21, which is convenient for the molding of the second injection layer A2. When the front mold body 221 closes the two-shot rear mold 23, the second pressing piece 222 located on the front mold body 221 contacts the first pressing block and applies pressure to the first pressing block. After the two-shot front mold 22 and the two-shot rear mold 23 are completely molded together, the second pressing block applies stable pressure to the first pressing block, and the movable insert 30 is clamped by the first pressing block and is continuously pressed by the second pressing block, ensuring the stability of the movable insert 30.

[0060] In this embodiment, a front mold 12 includes a front mold 12 body and a fourth pressure piece (not shown in the figure, the structure can refer to the second front mold 22), the front mold 12 body is used to close a shot mold cavity 11, and the fourth pressure piece is arranged on the side of the front mold body 221 close to a rear mold 13. When the front mold 12 body closes the shot mold cavity 11, the fourth pressure piece pushes the third pressure piece into a shot connecting groove and abuts against the movable insert 30.

[0061] In this embodiment, the two-shot molding mechanism 20 also includes a two-shot ejection system 24, which includes a top roller 241 and a first ejector pin 242. The movable insert 30 is provided with a top hole 32, and the top hole 32 is used for the first ejector pin 242 to pass through to abut against the two-shot product A. The top roller 241 is used to lift the first ejector pin 242.

[0062] Specifically, the top roller 241 is located below the two-shot connecting groove 231. The top roller 241 is accommodated in the two-shot rear mold 23 in a non-working state. When the second injection layer A2 on the movable insert 30 is completed and needs to be ejected, the top roller 241 rises to lift the first ejector pin 242. The first ejector pin 242 passes through the movable insert 30 and lifts the two-shot product A on the movable insert 30 to separate the two-shot product A from the movable insert 30.

[0063] Furthermore, the two-shot ejection system 24 also includes an ejector plate 243 and a guide post 244. The ejector plate 243 is disposed between the ejector roller 241 and the first ejector pin 242, and is used to increase the contact area between the ejector roller 241 and the first ejector pin 242, so as to ensure that when there are multiple first ejector pins 242, multiple first ejector pins 242 can be simultaneously ejected, thereby avoiding uneven force during the ejection process of the two-shot product A. The guide post 244 is disposed in parallel with the first ejector pin 242, and the ejector plate 243 is provided with a guide hole, and the guide post 244 is inserted into the guide hole, so that the ejector roller 241 is guided by the guide post 244 when it rises, thereby preventing the first ejector pin 242 from moving in a biased direction during the ejection operation.

[0064] In this embodiment, a vacuum suction system 40 and a suction monitoring system are also included. The vacuum suction system 40 includes a suction device 41, an air circuit 42 and an inserting needle 43. The air circuit 42 connects the suction device 41 and the inserting needle 43. The inserting needle 43 is fixed in the movable insert 30 and leads to the end of the movable insert 30 to absorb the first injection layer A1. The suction monitoring system is used to detect whether the air pressure of the vacuum suction system 40 is normal and whether the first injection layer A1 is absorbed.

[0065] In this embodiment, an ejection system 14 is also included. The ejection system 14 includes a second ejector pin 141 and a support column 142. The support column 142 and the second ejector pin 141 are arranged in parallel. The two ends of the second ejector pin 141 abut against a post-injection mold 23 and a movable insert 30. The support column 142 is fixed on the post-injection mold 23. When the second ejector pin 141 lifts the movable insert 30, the movable insert 30 slides out of the support column 142 along the second ejector pin 141 until the movable insert 30 is ejected from the injection molding mechanism 20. At the same time, the vacuum suction system 40 stops vacuuming, and the insert pin 43 on the movable insert 30 withdraws to release the encapsulation force.

[0066] The double-shot mold provided by the utility model defines a first shot mold cavity 11 by embedding a movable insert 30 in a first shot molding mechanism 10. After the first injection molding layer A1 is completed, the movable insert 30 carries the first injection molding layer A1 and moves into the second shot molding mechanism 20. The movable insert 30 is slidably connected in the second shot molding mechanism 20. By sliding the position of the movable insert 30, the movable insert 30 can define a second shot mold cavity 21 with the second shot molding mechanism 20, and the movable insert 30 can also be slid out of the second shot molding mechanism 20 to eject the finished product of the second injection molding layer A2. The setting of the movable insert 30 avoids the positioning problem of the one-shot and two-shot products, and the molding cycle of the product is also very fast, which greatly improves the production efficiency and saves the production cost. At the same time, the degree of freedom of the two-shot mold is increased, thereby freeing the design restrictions of the product size and product appearance, so that the appearance of the second injection molding layer A2 is no longer limited.

[0067] Second embodiment

[0068] Another embodiment of the present invention provides an injection molding device (not shown in the drawings), including a robot and a double-shot mold as described in the first embodiment, wherein the robot is used to clamp the movable insert 30 and place the movable insert 30 in the one-shot molding mechanism 10 or the two-shot molding mechanism 20.

[0069] The operation steps of the injection molding device are as follows:

[0070] Step 1: The robot first places an empty movable insert 30 into a first-shot mold cavity 11 of a first-shot molding mechanism 10;

[0071] Step 2: After the injection molding mechanism 10 completes the injection molding, the ejection system 14 ejects the movable insert 30 together with the first injection molding layer A1;

[0072] Step 3: The robot takes out the movable insert 30 together with the first injection layer A1 and puts them into the second-injection mold cavity 21 of the second-injection molding mechanism 20;

[0073] Step 4: The robot puts another empty movable insert 30 into an injection mold cavity 11;

[0074] Step 5: After the second-shot molding mechanism 20 completes the injection molding, the second-shot molding mechanism 20 ejects the movable insert 30 together with the product of the first-shot molding mechanism 10, and the second-shot ejection system 24 ejects the movable insert 30 together with the double-shot product A, and then the robot takes away the final double-shot product A;

[0075] Step 6: The robot takes out the movable insert 30 together with the first injection layer A1 and puts them into the second-shot mold cavity 21 (repeat step 3);

[0076] Cycle in sequence.

[0077] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A double-shot mold, comprising a first-shot molding mechanism (10) and a second-shot molding mechanism (20), characterized in that: It also includes a movable insert (30), wherein the movable insert (30) is alternately arranged in the first-shot molding mechanism (10) and the second-shot molding mechanism (20); The movable insert (30) is arranged in the injection molding mechanism (10) to define an injection molding cavity (11) for molding a first injection molding layer (A1) of a product; The movable insert (30) is slidably connected to the two-shot molding mechanism (20); as the movable insert (30) slides, the movable insert (30) and the two-shot molding mechanism (20) jointly define a two-shot mold cavity (21) for molding a second injection layer (A2) of a product, or the movable insert (30) exits the two-shot mold cavity (21).

2. A double shot mold according to claim 1, characterized in that: The bottom edge of the first injection mold cavity (11) is provided with a groove (111) so that the bottom edge of the first injection molded layer (A1) forms an embedding groove (A11); the second injection mold cavity (21) comprises a receiving area (211) and an injection molding area (212); the injection molding area (212) is superimposed on the receiving area (211); the receiving area (211) is used to receive the first injection molded layer (A1); the injection molding area (212) is used to mold the second injection molded layer (A2) on the first injection molded layer (A1); the injection molding area (212) extends to fill the groove (111) so that the second injection molded layer (A2) forms a barb (A21) that cooperates with the embedding groove (A11).

3. A two-shot mold according to claim 1, characterized in that: The two-shot molding mechanism (20) comprises a two-shot front mold (22) and a two-shot rear mold (23); the two-shot front mold (22), the two-shot rear mold (23) and the movable insert (30) together define the two-shot mold cavity (21); the two-shot front mold (22) can expose and seal the two-shot mold cavity (21).

4. A two-shot mold according to claim 3, characterized in that: The two-shot rear mold (23) is provided with a two-shot connecting groove (231), and the movable insert (30) is slidably connected to the inner wall of the two-shot connecting groove (231). As the movable insert (30) slides, the movable insert (30) approaches or moves away from the two-shot mold cavity (21), and the groove width of the two-shot connecting groove (231) gradually increases in a direction approaching the two-shot mold cavity (21).

5. A two-shot mold according to claim 4, characterized in that: The two-shot rear mold (23) is provided with a two-shot through hole (232) and a first pressing piece (233), the two-shot through hole (232) being connected to the two-shot connecting groove (231), and the first pressing piece (233) being elastically connected to the two-shot through hole (232) so as to pass through the two-shot through hole (232) and abut against the movable insert (30) in the two-shot connecting groove (231).

6. A two-shot mold according to claim 5, characterized in that: The movable insert (30) is provided with a clamping groove (31) for clamping with the first pressing piece (233).

7. A two-shot mold according to claim 5, characterized in that: The two-shot front mold (22) comprises a front mold body (221) and a second pressing piece (222), wherein the front mold body (221) is used to close the two-shot mold cavity (21), and the second pressing piece (222) is arranged on a side of the front mold body (221) close to the two-shot rear mold (23), and when the front mold body (221) closes the two-shot mold cavity (21), the second pressing piece (222) pushes the first pressing piece (233) to be injected into the two-shot connecting groove (231) and abut against the movable insert (30).

8. A two-shot mold according to claim 1, characterized in that: The two-shot molding mechanism (20) further comprises a two-shot ejection system (24), the two-shot ejection system (24) comprising an ejection roller (241) and a first ejector pin (242), the movable insert (30) being provided with an ejection hole (32), the ejection hole (32) being used for allowing the first ejector pin (242) to pass through to abut against the two-shot product (A), and the ejection roller (241) being used for ejecting the first ejector pin (242).

9. A two-shot mold according to claim 1, characterized in that: The movable insert (30) further comprises a vacuum suction system (40), the vacuum suction system (40) comprising a suction device (41), an air circuit (42) and an insert needle (43), the air circuit (42) connecting the suction device (41) and the insert needle (43), the insert needle (43) being arranged on the movable insert (30), and the insert needle (43) leading to the end of the movable insert (30) for sucking the first injection layer (A1).

10. An injection molding device, characterized in that: It comprises a robot and a double-shot mold as claimed in any one of claims 1 to 9, wherein the robot is used to clamp the movable insert and place the movable insert (30) in the one-shot molding mechanism (10) or the two-shot molding mechanism (20).

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