Two-color product forming mold

Abstract

The application discloses a double-color product forming die and relates to the technical field of die machining. The double-color product forming die comprises an upper die set and a lower die set. The upper die set comprises an upper die plate, a first upper die base and a second upper die base. The first upper die base and the second upper die base are used for corresponding injection of two materials. The lower die set is located below the upper die set. The lower die set comprises a main body, a rotating disc and two lower die bases. The main body is used for being fixed to the bottom plate of an injection molding machine. The rotating disc is rotatably installed to the main body along an axis extending in the up-down direction. The two lower die bases are arranged on the rotating disc in the horizontal direction and are spaced apart from each other. The position of the two lower die bases is changed during the rotation of the rotating disc, so that each lower die base has two matching positions. The first upper die base and one of the lower die bases cooperate to form a first die cavity used for forming a first injection molding part. The second upper die base and the other lower die base cooperate to form a second die cavity used for cooperating with the first injection molding part to form a second injection molding part.

Description

Technical Field

[0001] The present invention relates to the technical field of mold processing, in particular to a two-color product molding mold. Background Art

[0002] Existing two-color products are generally produced through separate injection molding, which then requires turnover, painting, and manual assembly. Some current products use specialized two-color injection molding machines to achieve the molding of two-color products, thereby simplifying the assembly process.

[0003] However, two-color injection molding machines can only produce two-color products, which limits production flexibility and may lead to equipment idleness. At the same time, the price and processing costs of two-color injection molding machines are far higher than those of ordinary single-color injection molding machines, so the cost is relatively high. Summary of the Invention

[0004] The main purpose of the present invention is to provide a two-color product molding mold, which can be used in a single-color injection molding machine to produce two-color products, thereby simplifying the assembly process and reducing investment costs.

[0005] To achieve the above-mentioned object, the present invention provides a two-color product forming mold, comprising:

[0006] An upper mold assembly, comprising an upper mold plate and two upper mold bases, the two upper mold bases being spaced apart and arranged at the lower end of the upper mold plate, the two upper mold bases comprising a first upper mold base and a second upper mold base for respectively injecting two materials, the upper mold plate being used to be fixed to a top plate of an injection molding machine;

[0007] A lower mold assembly is located below the upper mold assembly, and the lower mold assembly includes a main body, a rotating disk, and two lower mold bases. The main body is used to be fixed to the bottom plate of the injection molding machine. The rotating disk is rotatably mounted to the main body along an axis extending in the vertical direction. The two lower mold bases are spaced apart on the rotating disk so that during the rotation of the rotating disk, each lower mold base is driven to correspond to the two upper mold bases in sequence; and

[0008] A guide structure comprising a plurality of guide portions, wherein the plurality of guide portions are fixed to the main body and are arranged around the circumference of the rotating disk, each guide portion forming an arcuate mating surface at a side end facing the rotating disk, the arcuate mating surface being adapted to fit the outer shape of the rotating disk, and the plurality of arcuate mating surfaces being in contact with the circumferential side surface of the rotating disk;

[0009] The first upper mold base cooperates with one of the lower mold bases to form a first mold cavity for molding a first injection molded part, and the second upper mold base cooperates with the other lower mold base to form a second mold cavity for molding a second injection molded part in cooperation with the first injection molded part.

[0010] In one embodiment, the lower module further comprises:

[0011] a driving portion, located on the side of the main body, the driving portion having a driving rod capable of linear reciprocating motion; and

[0012] A gear and a rack, wherein the gear is fixed to the lower end of the rotating disk, the rack is engaged with the gear, and the rack is fixedly connected to the driving rod.

[0013] In one embodiment, there are two racks, which are respectively arranged on two opposite sides of the gear.

[0014] The driving rod is connected to one of the racks.

[0015] In one embodiment, two guide structures are provided, and the two guide structures are respectively provided at the upper end and the lower end of the main body.

[0016] In one embodiment, the peripheral side surface of the rotating disk is arranged in steps to form a first section and a second section with outer diameters decreasing from bottom to top;

[0017] The multiple guide portions of one of the guide structures are in contact with the outer wall of the second section, and the multiple guide portions of the other guide structure are in contact with the outer wall of the first section.

[0018] In one embodiment, a groove is provided in the middle portion of the upper end surface of the main body;

[0019] The rotating disk is rotatably installed in the groove.

[0020] In one embodiment, the two-color product forming mold further includes a plurality of limiting structures arranged at intervals along the circumference of the rotating disk, each of the limiting structures including:

[0021] a limiting groove, provided on the peripheral side surface of the rotating disk; and

[0022] A limiting member is movably mounted on the main body, and the limiting member can move toward or away from the rotating disk, so that it can extend into the limiting groove and resist the rotating disk during the movement.

[0023] In one embodiment, the limiting groove is arranged to pass through the rotating disk upward;

[0024] The limiting member is arranged in a stepped manner on one side facing the rotating disk to form a limiting convex portion, the limiting convex portion is used to extend into the limiting groove, and the limiting convex portion is flush with the upper end surface of the rotating disk.

[0025] In an embodiment, a recess is arranged in the middle of the upper end surface of the main body, and a plurality of guide grooves are arranged in the upper end surface of the main body and communicate with the recess, the plurality of guide grooves are arranged along the circumferential direction of the recess and extend along the radial direction of the rotating disc;

[0026] The rotating disc is rotatably arranged in the recess;

[0027] The plurality of limiting members are respectively slidably arranged in the plurality of guide grooves, and an inclined hole is arranged in the upper end of each limiting member and inclined downward away from the rotating disc;

[0028] The upper die plate is provided with inclined rods corresponding to the plurality of inclined holes, the plurality of inclined rods can be driven to extend downward into the plurality of inclined holes to drive the plurality of limiting members to approach each other and jointly abut against the rotating disc, or be driven to extend upward away from the plurality of inclined holes to drive the plurality of limiting members to separate from the rotating disc.

[0029] In an embodiment, the rotating disc is provided with a through hole corresponding to each lower die seat;

[0030] The two-color product forming mold further comprises a pushing part corresponding to the second upper die seat in the up-down direction, the pushing part is arranged on the main body or the base of the injection molding machine and has an up-down movement stroke, and the pushing part can pass through the through hole upward to lift the assembly away from the corresponding lower die seat.

[0031] In an embodiment, the pushing part is provided with two, and the two pushing parts are driven by the same driving structure, the rotating disc is provided with two through holes corresponding to each lower die seat; and / or,

[0032] The lower die set further comprises a driving part, a gear and a rack which cooperate with each other, the driving part is fixed to the main body and connected with the rack, the gear is fixed to the middle of the lower end of the rotating disc and engaged with the rack, and the pushing part is located on the side of the rack away from the gear;

[0033] In an embodiment, the rotating disc is provided with two oppositely arranged cooling water circulation flow paths corresponding to the two lower die seats, and after the rotating disc rotates, the two cooling water circulation flow paths can communicate with the water pipes corresponding to the single-color injection molding machine; and / or,

[0034] The upper die set is detachably arranged and used for cooperating with the nozzle on the single-color injection molding machine.

[0035] In the technical solution of the present invention, the rotation of the rotating disk can drive the position change of the two lower mold bases, so that each lower mold base has two mating positions, so that one of the lower mold bases cooperates with the first upper mold base to form a first mold cavity for molding the first injection-molded part. After the rotating disk rotates, the lower mold base carrying the first injection-molded part cooperates with the second upper mold base to form a second mold cavity for molding the second injection-molded part, thereby obtaining a combination of the first injection-molded part and the second injection-molded part through secondary injection molding. Because the two upper and lower mold bases close synchronously when the upper and lower mold bases close, two materials can be injected simultaneously during a stable production process. As a result, after the upper and lower mold assemblies are opened, a first injection molded part and a second injection molded part can be obtained simultaneously. The second injection molded part is attached to the first injection molded part, meaning that after the second injection molded part is molded, an assembly is obtained. The assembly is removed, the rotating disk is driven to rotate 180°, and the mold is closed again for processing. A new assembly is obtained when the mold is opened again. This system has a wide range of applications and is suitable for all two-color products, significantly reducing machine investment costs, providing greater flexibility, and improving production efficiency. Furthermore, multiple guides are provided that contact the rotating disk through arc-shaped mating surfaces. These guides are precisely machined to limit rotational friction between the two, allowing the multiple guides to collectively guide the rotating disk and ensure smooth rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0037] Figure 1 A cross-sectional schematic diagram of an embodiment of a two-color product molding die provided by the present invention;

[0038] Figure 2 for Figure 1 Schematic diagram of the structure of the middle drive unit and the gear rack;

[0039] Figure 3 for Figure 1 Schematic diagram of the structure of the middle rotating disk and the guide structure;

[0040] Figure 4 for Figure 1 Structural diagram of the middle limit structure;

[0041] Figure 5 for Figure 4 Schematic diagram of the structure of the middle limiter;

[0042] Figure 6 for Figure 1 Schematic diagram of the structure of the middle limiter and the rotating disk.

[0043] Description of Figure Numbers:

[0044] 100. Two-color product molding die; 1. Upper die assembly; 11. Upper mold plate; 12. Upper die base; 121. First upper die base; 122. Second upper die base; 13. Tilt rod; 2. Lower die assembly; 21. Main body; 211. Groove; 212. Guide groove; 22. Rotating plate; 221. First section; 222. Second section; 23. Lower die base; 24. Driving unit; 25. Gear; 26. Rack; 3. Guide structure; 31. Guide unit; 4. Limiting structure; 41. Limiting groove; 42. Limiting member; 421. Limiting protrusion; 422. Tilt hole; 5. Pushing unit.

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] The existing two-color products are generally formed by separate injection molding, and then need to be transferred, painted and manually assembled. For example, the air conditioner panel assembly needs to be separately injection molded to produce the upper panel and the lower panel. After injection molding, the lower panel needs to be transferred to the paint shop for painting. After painting, it is transferred again for manual assembly to make the upper panel and the lower panel into an assembly. This process is low in efficiency, the transfer process is contaminated, and manual assembly is prone to product scrap due to improper operation.

[0050] Some current two-color products are realized by two-color injection molding. Two-color injection molding refers to the injection molding of two plastic materials in two times on the same injection molding machine, which is a kind of injection molding technology capable of simplifying the assembly process and improving the appearance grade of products. However, two-color injection molding usually requires a special two-color injection molding machine, the price of which is 2-3 times that of a common single-color injection molding machine of the same tonnage, the processing cost is 3 times that of a single-color machine of the same tonnage, and the production flexibility is limited, which cannot adapt to single-color products.

[0051] In order to save the two-color injection molding machine, some two-color plastic parts have been formed by core pulling, translation, rotation and other displacement actions. A current two-color mold structure produced by a single-color machine forms a second injection molded part in the space flashed by the rearward movement of the insert after the first shot, thereby realizing the molding of two-color products. However, in this technology, the first injection molded part and the second injection molded part are formed separately, which wastes the cycle and increases the cost of product processing. Since the mold structure mainly forms the second injection molded part in the space flashed by the rearward movement of the insert, the shape of the second injection molded part is the shape of the space flashed by the rearward movement of the insert, which can only be applied to specific products, and the product application range is small. Moreover, due to the core pulling action of this technology, the core pulling needs to overcome part of the mold locking pressure, which is prone to core pulling jamming due to factors such as mold locking pressure and temperature change.

[0052] Another existing single-cavity two-color mold can avoid obstacles by opening the moving mold twice, and then drive the sliding plate by the oil cylinder to translate the displacement insert, use the displacement insert and the first injection molded part to form a second cavity, and then realize the molding of two-color products. However, in this technology, the first injection molded part and the second injection molded part are formed separately, which wastes the cycle and increases the cost of product processing. The first injection molded part and the second injection molded part cannot be injection molded at the same time, which wastes the cycle and increases the cost of product processing. Since the displacement insert and the first injection molded part form the second cavity, the shape of the second injection molded part will be covered by the displacement insert, so the second injection molded part cannot be formed into a complex shape, and the product application range is small. At the same time, the mold needs to meet special arrangement to realize two-color injection molding. Since the displacement insert needs to be displaced to realize two-color injection molding, three positions on the mold are needed to accommodate the displacement insert, two positions are used to place the displacement insert, and one position is in the waiting area to place the displacement insert after translation. Only one of the three positions is involved in product molding, the mold has high limitations, and the displacement insert is prone to breakage during the displacement and secondary molding process.

[0053] The first injection molded part is a product that is first molded by injecting rubber compound into an injection molding machine, and the second injection molded part is a product that is molded by injecting rubber compound into the injection molding machine again based on the first injection molded part.

[0054] Based on the above situation, the present invention provides a two-color product molding mold. During stable production, the injection molding of the first injection molded part and the second injection molded part can be carried out simultaneously, with a short cycle, and the position change of the lower mold base can be achieved by rotating the rotating disk, which is more flexible.

[0055] Please refer to Figures 1-2 The two-color product molding mold 100 includes an upper mold group 1 and a lower mold group 2. The upper mold group 1 includes an upper mold plate 11 and two upper mold bases 12. The two upper mold bases 12 are arranged at the lower end of the upper mold plate 11 at intervals in the horizontal direction. The two upper mold bases 12 include a first upper mold base 121 and a second upper mold base 122 for correspondingly injecting two materials. The upper mold plate 11 is used to be fixed to the top plate of the injection molding machine; the lower mold group 2 is located below the upper mold group 1. The lower mold group 2 includes a main body 21, a rotating disk 22 and two lower mold bases 23. The main body 21 is used to fix To the bottom plate of the injection molding machine, the rotating disk 22 is rotatably installed to the main body 21 along the axis extending in the up and down directions, and the two lower mold bases 23 are arranged on the rotating disk 22 at intervals in the horizontal direction, so that during the rotation of the rotating disk 22, each lower mold base 23 is driven to correspond to the two upper mold bases 12 in sequence, wherein the first upper mold base 121 cooperates with one of the lower mold bases 23 to form a first mold cavity for molding a first injection-molded part, and the second upper mold base 122 cooperates with the other lower mold base to form a second mold cavity for cooperating with the first injection-molded part to mold a second injection-molded part.

[0056] In the technical solution of the present invention, the rotation of the rotating disk 22 can drive the position change of the two lower mold bases 23, so that each lower mold base 23 has two mating positions, so that one of the lower mold bases 23 cooperates with the first upper mold base 121 to form a first mold cavity for molding a first injection molded part. After the rotating disk 22 rotates, the lower mold base 23 carrying the first injection molded part is molded and cooperates with the second upper mold base 122 to form a second mold cavity for molding a second injection molded part, thereby obtaining a combined assembly of the first injection molded part and the second injection molded part through secondary injection molding. Since the upper mold base 12 and the lower mold base 23 are molded synchronously when the two upper mold bases 12 and the two lower mold bases 23 are molded, the two materials can be injected synchronously during a stable production process. Therefore, after the upper mold group 1 and the lower mold group 2 are opened, a composite part with both materials injected and a part with only one material injected can be obtained at the same time. After the rotating disk 22 is driven to rotate 180 degrees and the mold is closed again, a new composite part can be obtained when the mold is opened again. The system has a wide range of applications, including all two-color products, significantly reducing machine investment costs while offering greater flexibility and high production efficiency. Furthermore, multiple guides 31 are provided to contact the rotating disk 22 via arcuate mating surfaces. These guides 31 and the rotating disk 22 are precisely machined to limit rotational friction between them. This allows the multiple guides 31 to collectively guide the rotating disk 22, ensuring smooth rotation.

[0057] Since the rotating disk 22 is a movable part, there is a gap between it and the main body 21. Each arc-shaped mating surface contacts the peripheral side surface of the rotating disk 22, which can ensure the smooth rotation of the rotating disk 22, so that the multiple guide parts 31 can jointly play the function of guiding the rotating disk 22.

[0058] Specifically, the structure can be realized by a single-color injection molding machine and a runner system, that is, by adding a nozzle to the single-color injection molding machine, thereby realizing two-color injection molding using the single-color injection molding machine, and setting the upper module 1 to be detachably installed, so that it can adapt to the nozzle and runner design on the single-color injection molding machine, and realizing two-color injection molding with a single-color injection molding machine without limitation, and can be applied to all two-color products, greatly reducing the machine investment cost and having greater flexibility and high production efficiency.

[0059] The cavities of the first upper mold base 121 and the second upper mold base 122, used for injecting different materials, should be differentiated to accommodate the shrinkage and molding profiles of the different materials. During a stable injection molding process, the first upper mold base 121 is used to mold with the empty lower mold base 23 to form a part, while the second upper mold base 122 is used to mold with the loaded lower mold base 23 to form an assembly.

[0060] Initially, both lower mold bases 23 are in an empty state, and the upper mold assembly 1 and the lower mold assembly 2 are relatively movable so that the two upper mold bases 12 and the two lower mold bases 23 are in close mold cooperation. The first upper mold base 121 is used for injection molding, while the second upper mold base 122 is not used for injection molding. After the mold is opened, the lower mold base 23 that cooperates with the first upper mold base 121 is attached with a thermosetting part, i.e., the first injection molded part, and the lower mold base 23 that cooperates with the second upper mold base 122 is still empty. Then the rotating disk 22 rotates 180° to change the positions of the two lower mold bases 23. The lower mold base 23 carrying the part is transferred to correspond to the second upper mold base 122, and the empty lower mold base 23 is transferred to correspond to the first upper mold base 121. The mold is closed again, and the first upper mold base 121 and the second upper mold base 122 are respectively injected with different materials. When the lower mold base 23 carrying the first injection-molded part cooperates with the second upper mold base 122, the second injection-molded part is injected on the basis of the first injection-molded part. After the mold is opened again, the first injection-molded part is attached to the lower mold base 23 corresponding to the first upper mold base 121, and the assembly is attached to the lower mold base 23 corresponding to the second upper mold base 122. After the assembly is removed, the process of rotating the rotating disk 22 and closing the mold for injection is repeated, so that an assembly can be removed from the lower mold base 23 corresponding to the second upper mold base 122 after each mold opening.

[0061] Although there is a sequence for the injection molding of the first injection molded part and the second injection molded part for the assembly, the first injection molded part and the second injection molded part can be injected at the same time for the mold structure. Except for the first injection molding, the assembly can be removed once the mold is opened after each injection molding, so that the first injection molded part and the second injection molded part can be injected at the same time due to the spatial dislocation, which saves cycles and improves efficiency.

[0062] Regarding the rotational cooperation between the main body 21 and the rotating disk 22, the rotating disk 22 can be provided on the upper end surface of the main body 21. In this embodiment, a groove 211 is provided in the middle of the upper end surface of the main body 21, and the rotating disk 22 is rotatably installed in the groove 211. This arrangement can rationally utilize space and help reduce the overall height of the mold.

[0063] The present invention does not limit the rotation drive form of the rotating disk 22, and the rotation can be achieved by electrical drive. Considering that the injection molding process will bring high temperature, in some embodiments, the lower mold 2 also includes a driving part 24, a gear 25 and a rack 26. The driving part 24 is located on the side of the main body 21, that is, the core component of the driving part 24 is not arranged in the mold structure, but is exposed outside the mold structure. The driving part 24 has a driving rod that can reciprocate in the horizontal direction. The gear 25 is fixed to the middle of the lower end of the rotating disk 22, and the rack 26 is engaged with the gear 25. The rack 26 is fixedly connected to the driving rod. By controlling the driving rod to reciprocate in the horizontal direction to drive the rack 26 to move, the gear 25 can be driven to rotate.

[0064] Specifically, the driving portion 24 is configured as an oil cylinder, the driving rod corresponds to the hydraulic rod of the oil cylinder, and the extending direction of the driving rod should be consistent with the extending direction of the rack 26 .

[0065] It should be noted that the gear 25 and the rotating disk 22 can be connected by an adapter block. In order to facilitate the linear guidance of the rack 26, a corresponding track groove can be provided inside the main body 21 so that the rack 26 can be installed.

[0066] Furthermore, two racks 26 are provided, one on opposite sides of the gear 25 in the horizontal direction, and the driving rod is connected to one of the racks 26. That is, one of the racks 26 is actively driven, while the other is passively moved. This ensures the bearing capacity of the opposite sides of the gear 25 when the racks 26 are engaged with the gear 25, thereby preventing the rotating disk 22 from shaking during the process of being driven to rotate.

[0067] It should be understood that, since the rotation of the rotating disk 22 drives the two lower die bases 23 to change their positions, the two lower die bases 23 should be symmetrically arranged.

[0068] Based on the above embodiment, a corresponding rotating shaft needs to be provided on the rotating disk 22 for installing the gear 25. At this time, the water channels involved in the design and construction of the rotating disk 22 can be led out from the rotating shaft to the main body 21, and the inlet and outlet water pipes are connected to the main body 21, thereby preventing the inlet and outlet water pipes from being entangled with the rotation of the rotating disk 22 and the problem of the water pipes being damaged by the mold closing.

[0069] Specifically, the rotating disk 22 is provided with independent cooling water circulation paths corresponding to the two lower mold bases 23. After the rotating disk 22 rotates, the two cooling water circulation paths can still be connected to the water pipes corresponding to the single-color injection molding machine. Specifically, each cooling water circulation path has at least one water inlet and at least one water outlet. By setting a groove on the rotating shaft, the water inlet and the water outlet are integrated on the rotating shaft. At this time, multiple water inlet pipes and multiple water outlet pipes of the injection molding machine are connected at corresponding positions on the main body 21. During the rotation of the rotating disk 22, the cooling system is not pressurized. Therefore, even if there is water in the cooling water circulation path, the water will not circulate. After the rotating disk 22 is rotated to the position, even if the corresponding relationship between the water inlet, water outlet and the water inlet pipe and water outlet pipe changes due to the rotation, since the two cooling water circulation paths are relatively arranged, the water inlet or water outlet of one of the lower mold bases 23 will correspond to the original water inlet pipe and water outlet pipe of the other lower mold base, which will not affect the cooling cycle.

[0070] It should be noted that a corresponding sealing sleeve is provided to prevent water leakage during the pipe connection process.

[0071] Furthermore, the upward end of the rotating disk 22 can be set to protrude from the main body 21. In this case, the guide portion 31 is set on the corresponding end face of the main body 21, and is abutted against the protruding part of the rotating disk 22. A groove 211 can also be set in the middle of the upper end face of the main body 21, and the rotating disk 22 is rotatably installed in the groove 211. The inner wall surface of the groove 211 is partially recessed, so that the guide portion 31 can be embedded and installed. At this time, the end of the guide portion 31 is in the gap between the inner wall of the groove 211 and the rotating disk 22.

[0072] It should be understood that the material of the mold structure is generally metal, and the material of the guide portion 31 can be metal or a high-temperature resistant polymer material, and the present invention does not impose any limitation on this.

[0073] The number of the guide parts 31 is not limited and can be reasonably set according to the size of the rotating disk 22, and can be 6, 7, etc.

[0074] Furthermore, two guide structures 3 are provided, one at the upper end and the other at the lower end of the main body 21. The design of the upper and lower guide portions 31 ensures the stable rotation of the rotating disk 22. It should be understood that the upper and lower guide portions 31 can be arranged opposite each other or staggered. The number of guide portions 31 in the two guide structures 3 can be the same or different.

[0075] During the rotation of the rotating disk 22, there are two stop positions. In this embodiment, guide posts are designed on the rotating disk 22 to ensure accurate resetting of the rotating disk 22. Even if there is a clearance between the gear 25 and the rack 26, the design of the guide posts can still ensure accurate positioning of the mold at the two stop positions. It should be noted that multiple guide posts are provided, a portion of which is provided on the rotating disk 22 and arranged in a circumferential direction and staggered with the lower mold base 23, while the other portion of the guide posts is provided on the main body 21. Thus, the inner guide posts are used for mold closing positioning, while the outer guide posts are used for linear guidance during the mold opening and closing processes.

[0076] Please refer to Figures 3-4 The circumferential side surface of the rotating disk 22 is arranged in a stepped manner, forming a first section 221 and a second section 222 with decreasing outer diameters from bottom to top. The multiple guide portions 31 of one guide structure 3 contact the outer wall of the second section 222, while the multiple guide portions 31 of the other guide structure 3 contact the outer wall of the first section 221. In other words, the sides of the upper and lower guide structures 3 that contact the rotating disk 22 are arranged in a stepped manner. This arrangement can define the rotation path of the rotating disk 22 in two dimensions, thereby achieving a better stabilization effect.

[0077] It should be understood that since the outer diameter of the rotating disk 22 is variable, the gap between it and the inner wall of the groove 211 is also variable, that is, the dimensions of the upper guide portion 31 and the lower guide portion 31 extending into the groove 211 are different.

[0078] Specifically, the outer diameter of the rotating disk 22 can be changed by processing, or by assembly, that is, the rotating disk 22 itself is composed of multiple plates, which is convenient for partial hollowing and can reduce the difficulty of processing. In this case, the outer diameters of the multiple plates can be set to different levels.

[0079] Considering that the rotating disk 22 is a movable component, its movable drive is independent of the injection molding equipment. Because, in order to ensure that the position of the rotating disk 22 is fixed during mold closing, in some embodiments, the two-color product molding mold 100 also includes a plurality of limiting structures 4 arranged at circumferential intervals along the rotating disk 22, each limiting structure 4 includes a limiting groove 41 and a limiting member 42, and the limiting groove 41 is provided on the peripheral side of the rotating disk 22; the limiting member 42 is movably installed to the main body 21, and the limiting member 42 can move in the direction of approaching or moving away from the rotating disk 22, so that it can extend into the limiting groove 41 to support the rotating disk 22 during the movement. When the rotating disk 22 rotates to the two stop positions, it is necessary to ensure that the multiple limit members 42 and the multiple limit grooves 41 correspond one to one along the radial direction of the rotating disk 22, so that the limit members 42 can be driven to move until they are engaged in the limit grooves 41, thereby locking the rotating disk 22 through the engagement of the multiple limit members 42 and the multiple limit grooves 41, ensuring that the rotating disk 22 does not move during the injection molding process, and when the mold is opened, the multiple limit members 42 retreat to separate from the limit grooves 41, thereby ensuring that the rotation of the rotating disk 22 is not affected.

[0080] The limiting groove 41 can be a step groove, a T-shaped groove, a U-shaped groove or an arc groove, and the present invention does not limit this. The limiting member 42 can be set accordingly. Figures 5-6 The limiting groove 41 is set upward through the rotating disk 22 to facilitate processing. The limiting member 42 is set in a stepped manner on the side facing the rotating disk 22 to form a limiting protrusion 421. The limiting protrusion 421 is used to extend into the limiting groove 41, and the limiting protrusion 421 is flush with the upper end surface of the rotating disk 22. The limiting member 42 is stepped as a whole. When cooperating with the limiting groove 41, it can also rely on its own step structure to limit the position. The outer step surface of the limiting member 42 abuts against the peripheral side surface of the rotating disk 22 to form a mechanical limit, thereby defining the stop position of the limiting member 42. The limiting member 42 is set flush with the rotating disk 22 to avoid interference caused by the limiting member 42 during mold closing. The flushness can also be used to detect the position of the limiting member 42. If the limiting member 42 can be observed to protrude from the rotating disk 22, it means that the limiting member 42 has undergone significant material expansion or installation position difference.

[0081] In order to realize the automatic driving and resetting of the limiting member 42, in some embodiments, please refer to Figure 4 A groove 211 is provided in the middle of the upper end surface of the main body 21, and a plurality of guide grooves 212 connected to the groove 211 are also provided on the upper end surface of the main body 21. The plurality of guide grooves 212 are arranged along the circumference of the groove 211 and extend along the radial direction of the rotating disk 22; the rotating disk 22 is rotatably installed in the groove 211; a plurality of limit members 42 are respectively slidably installed in the plurality of guide grooves 212, and the upper end of each limit member 42 is provided with an inclined hole 422 inclined from top to bottom in the direction away from the rotating disk 22; the upper template 11 is provided with inclined rods 13 corresponding to the plurality of inclined holes 422, and the plurality of inclined rods 13 can be driven downward to extend into the plurality of inclined holes 422 to drive the plurality of limit members 42 to approach each other and jointly resist the rotating disk 22, or be driven upward to disengage from the plurality of inclined holes 422 to drive the plurality of limit members 42 to separate from the rotating disk 22. When the mold is closed, the tilting rod 13 extends into the tilting hole 422, thereby driving the multiple limit members 42 through the form of inclined wedge cooperation. When separating, it drives in the opposite direction, so that the multiple limit members 42 can be reset. This structural form can link the drive of the limit member 42 and the opening and closing action of the mold together, making the structural cooperation tighter and helping to reduce the number of parts of the mold.

[0082] It should be noted that the guide groove 212 can be set as an inverted T-shaped groove, and the outer side of the limiting member 42 is correspondingly set, so as to achieve the effect of preventing it from falling off.

[0083] In other embodiments, a spring structure may be provided to control the movement and reset of the limiting member 42 , which will not be described in detail in the present invention.

[0084] Each lower mold base 23 is sequentially coupled with the first upper mold base 121 and the second upper mold base 122 for injection molding to obtain an integrated assembly of the first and second injection molded parts. The assembly is attached to the corresponding lower mold base 23. To facilitate demolding of the assembly, in some embodiments, the rotating disk 22 is provided with a through hole corresponding to each lower mold base 23. The two-color product molding mold 100 also includes a push portion 5 provided in the upper and lower directions corresponding to the second upper mold base 122. The push portion 5 is provided on the main body 21 or the base of the injection molding machine and has a movable stroke in the upper and lower directions. The push portion 5 can pass through the through hole upward to lift the assembly until it is separated from the corresponding lower mold base 23. When designing the ejection structure, the push portion 5 is provided on the main body 21 or the base of the injection molding machine so that it can be independent of the rotating disk 22, so that the push portion 5 is always below the second upper mold base 122, preventing the push portion 5 from moving synchronously with the rotation of the rotating disk 22. Each lower mold base 23 can be driven by the rotating disk 22 to cooperate with the second upper mold base 122 to inject and mold the assembly. Therefore, each time the mold is opened, the lower mold base 23 located below the second upper mold base 122 is different. Therefore, a through hole needs to be provided on the rotating disk 22 corresponding to each lower mold base 23. At the two stop positions of the rotating disk 22, there is a through hole corresponding to the push part 5, so that when the mold is opened, the push part 5 can be controlled to pass through the corresponding through hole to drive the assembly to separate from the lower mold base 23, thereby realizing automatic demolding.

[0085] According to different product sizes, two pushing parts 5 can be provided. The two pushing parts 5 are driven by the same driving structure to jointly eject an assembly from the mold. Accordingly, the rotating disk 22 is provided with two through holes corresponding to each lower mold base 23.

[0086] When the rotating disk 22 is driven to rotate by the cooperating driving part 24, gear 25 and rack 26, the pushing part 5 should be located on the side of the rack 26 facing away from the gear 25 to avoid structural interference while ensuring a larger installation space.

[0087] Taking the panel composition of an air conditioner as an example, the panel composition includes an upper panel and a lower panel. The processing process of the two-color product molding mold 100 is as follows:

[0088] Step 1: Both lower mold bases 23 are in an empty state, and the upper mold group 1 and the lower mold group 2 are relatively movable to achieve mold closing, and only the first upper mold base 121 is used for injection molding. After the mold is opened, the lower mold base 23 that matches the first upper mold base 121 is attached with a thermosetting lower panel; then the rotating disk 22 rotates 180 degrees, and the lower mold base 23 carrying the lower panel is transferred to the corresponding position of the second upper mold base 122, and the empty lower mold base 23 is transferred to the corresponding position of the first upper mold base 121. The mold is closed again, and different materials are injected into the first upper mold base 121 and the second upper mold base 122 respectively. After the mold is opened, the lower mold base 23 corresponding to the first upper mold base 121 is attached with the lower panel, and the lower mold base 23 corresponding to the second upper mold base 122 is attached with the upper and lower panels.

[0089] Step 2: After the assembly is removed, the corresponding lower mold base 23 is empty, and the control rotating disk 22 is rotated 180 degrees again. The lower mold base 23 carrying the lower panel is transferred to correspond to the second upper mold base 122, and the empty lower mold base 23 is transferred to correspond to the first upper mold base 121. The mold is closed again, and the first upper mold base 121 and the second upper mold base 122 are respectively injected with different materials. After the mold is opened, the lower mold base 23 corresponding to the first upper mold base 121 is attached with the lower panel, and the lower mold base 23 corresponding to the second upper mold base 122 is attached with the assembly of the upper and lower panels.

[0090] Repeat step 2 to obtain an assembly of an upper panel and a lower panel after each mold opening.

[0091] In the technical solution of the present invention, a single-color injection molding machine can be used to achieve two-color injection molding. The two lower mold bases 23 are provided with the same cavity. The first upper mold base 121 and the second upper mold base 122 are used to respectively inject different materials so as to match the lower mold base to form different injection molded parts. Specifically, it can be achieved by different shapes or only by different cavity depths. Therefore, complex two-color injection molding can be achieved. The rotating disk 22 is driven to rotate by the oil cylinder and is provided with a matching ejection system. Therefore, all functions of the two-color injection molding machine can be realized. The injection molding of two materials can be carried out simultaneously without limitation. It can be applied to all two-color products that meet the material characteristics, reducing machine investment costs and being more flexible. In addition, the mold cost of the single mold equipped with a rotating disk 22 is compared with the two sets of conventional two-color molds. The mold cost also has different degrees of cost reduction. When there is no demand for two-color production, the module can be removed and replaced to produce the original single-color product.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A two-color product molding mold, realized by a single-color injection molding machine and a runner system, characterized in that: include: An upper mold assembly, comprising an upper mold plate and two upper mold bases, the two upper mold bases being spaced apart and arranged at the lower end of the upper mold plate, the two upper mold bases comprising a first upper mold base and a second upper mold base for respectively injecting two materials, the upper mold plate being used to be fixed to a top plate of an injection molding machine; A lower mold assembly is located below the upper mold assembly, and the lower mold assembly includes a main body, a rotating disk, and two lower mold bases. The main body is used to be fixed to the bottom plate of the injection molding machine. The rotating disk is rotatably mounted to the main body along an axis extending in the vertical direction. The two lower mold bases are spaced apart on the rotating disk so that during the rotation of the rotating disk, each lower mold base is driven to correspond to the two upper mold bases in sequence; and A guide structure comprising a plurality of guide portions, wherein the plurality of guide portions are fixed to the main body and are arranged around the circumference of the rotating disk, each guide portion forming an arcuate mating surface at a side end facing the rotating disk, the arcuate mating surface being adapted to fit the outer shape of the rotating disk, and the plurality of arcuate mating surfaces being in contact with the circumferential side surface of the rotating disk; Wherein, the first upper mold base cooperates with one of the lower mold bases to form a first mold cavity for molding a first injection molded part, and the second upper mold base cooperates with the other lower mold base to form a second mold cavity for molding a second injection molded part in cooperation with the first injection molded part; A groove is provided in the middle of the upper end surface of the main body, and the rotating disk is rotatably installed in the groove. The inner wall surface of the groove is partially recessed so that the guide part can be embedded and installed. The end of the guide part is located in the gap between the inner wall of the groove and the rotating disk. The circumferential side surface of the rotating disk is arranged in steps to form a first section and a second section with outer diameters decreasing from bottom to top; Two guide structures are provided, wherein the multiple guide parts of one guide structure are in contact with the outer wall of the second section, and the multiple guide parts of the other guide structure are in contact with the outer wall of the first section, that is, the side surfaces of the guide structure located on the upper side and the guide structure located on the lower side in contact with the rotating disk are arranged in a stepped manner.

2. The two-color product molding die according to claim 1, characterized in that: The lower module also includes: a driving portion, located on the side of the main body, the driving portion having a driving rod capable of linear reciprocating motion; and A gear and a rack, wherein the gear is fixed to the lower end of the rotating disk, the rack is engaged with the gear, and the rack is fixedly connected to the driving rod.

3. The two-color product forming mold according to claim 2, characterized in that: There are two racks, which are arranged on two opposite sides of the gear; The driving rod is connected to one of the racks.

4. The two-color product forming mold according to claim 1, characterized in that: The two-color product forming mold further includes a plurality of limiting structures arranged at intervals along the circumference of the rotating disk, each of the limiting structures including: A limiting groove is provided on the peripheral side surface of the rotating disk; and A limiting member is movably mounted on the main body, and the limiting member can move toward or away from the rotating disk, so that it can extend into the limiting groove and resist the rotating disk during the movement.

5. The two-color product forming mold according to claim 4, characterized in that: The limiting groove is arranged to pass through the rotating disk upwards; The limiting member is arranged in a stepped manner on one side facing the rotating disk to form a limiting convex portion, the limiting convex portion is used to extend into the limiting groove, and the limiting convex portion is flush with the upper end surface of the rotating disk.

6. The two-color product forming mold according to claim 4, characterized in that: A groove is provided in the middle of the upper end surface of the main body, and a plurality of guide grooves communicating with the groove are further provided on the upper end surface of the main body. The plurality of guide grooves are arranged along the circumference of the groove and extend along the radial direction of the rotating disk; The rotating disk is rotatably installed in the groove; The plurality of limiting members are respectively slidably mounted in the plurality of guide grooves, and an upper end of each limiting member is provided with an inclined hole inclined from top to bottom in a direction away from the rotating disk; The upper template is provided with inclined rods corresponding to the multiple inclined holes. The multiple inclined rods can be driven downward to extend into the multiple inclined holes to drive the multiple limit members to approach each other and jointly support the rotating disk, or be driven upward to disengage from the multiple inclined holes to drive the multiple limit members to separate from the rotating disk.

7. The two-color product forming mold according to claim 1, characterized in that: The rotating disk is provided with a through hole corresponding to each of the lower die seats; The two-color product molding mold also includes a pushing portion arranged corresponding to the second upper mold base in the upper and lower directions. The pushing portion is arranged on the base of the main body or the injection molding machine and has a movable stroke along the upper and lower directions. The pushing portion can pass upward through the through hole to lift the assembly until it is separated from the corresponding lower mold base.

8. The two-color product forming mold according to claim 7, characterized in that: Two pushing parts are provided, the two pushing parts are driven by the same driving structure, and the rotating disk is provided with two through holes corresponding to each lower die base; and / or, The lower mold assembly also includes a driving part, a gear and a rack that cooperate with each other. The driving part is fixed to the main body and connected to the rack. The gear is fixed to the middle of the lower end of the rotating disk and meshes with the gear. The pushing part is located on the side of the rack facing away from the gear.

9. The two-color product forming mold according to claim 1, characterized in that: Two cooling water circulation paths are provided on the rotating disk corresponding to the two lower mold bases. After the rotating disk rotates, the two cooling water circulation paths can be connected to the water pipes corresponding to the single-color injection molding machine; and / or, The upper die set is detachably mounted and is used to cooperate with the nozzle on a single-color injection molding machine.

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