Double-color product forming mold

Abstract

The invention discloses a double-color product forming mold, and relates to the technical field of mold machining, the double-color product forming mold comprises an upper mold set and a lower mold set, the upper mold set comprises an upper mold plate, a first upper mold base and a second upper mold base, and the first upper mold base and the second upper mold base are used for corresponding injection molding of two materials; the lower module is located below the upper module and comprises a main body, a rotating disc and two lower mold bases, the main body is used for being fixed to a bottom plate of the injection molding machine, the rotating disc is rotationally installed on the main body along the axis extending in the vertical direction, and the two lower mold bases are arranged on the rotating disc at intervals in the horizontal direction; the first upper mold base is matched with one of the two lower mold bases to form a first mold cavity used for forming a first injection molding part, and the second upper mold base is matched with the other lower mold base to form a second mold cavity used for forming a second injection molding part. And the second upper mold base is matched with the other lower mold base to form a second mold cavity matched with the first injection molding piece to form a second injection molding piece.

Description

Technical Field

[0001] The present invention relates to the technical field of mold processing, and particularly to a two-color product forming mold. Background Art

[0002] Existing two-color products are generally formed by separate injection molding, and then need to go through turnover, painting and manual assembly. At present, some products use special two-color injection molding machines to realize the forming of two-color products, thus simplifying the assembly process.

[0003] However, the two-color injection molding machine can only produce two-color products, and the production flexibility is limited, resulting in the situation of equipment idleness. At the same time, the price and processing cost of the two-color injection molding machine 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 object of the present invention is to provide a two-color product forming mold, which can be applied to a single-color injection molding machine to produce two-color products, thereby simplifying the assembly process and reducing the input cost.

[0005] To achieve the above object, the present invention provides a two-color product forming mold, comprising: An upper mold assembly, including an upper template and two upper mold bases. The two upper mold bases are spaced apart and arranged at the lower end of the upper template. The two upper mold bases include a first upper mold base and a second upper mold base for correspondingly injecting two kinds of materials. The upper template is used to be fixed to the top plate of the injection molding machine; A lower mold assembly, located below the upper mold assembly. 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 installed on the main body along an axis extending in the up and down direction. The two lower mold bases are spaced apart and arranged 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 guiding structure, including a plurality of guiding parts. The plurality of guiding parts are fixed to the main body and are arranged around the circumference of the rotating disk. An arc-shaped mating surface is formed at the side end of each guiding part facing the rotating disk. The arc-shaped mating surface is used to be adapted to the outer shape of the rotating disk, and the plurality of arc-shaped mating surfaces are in contact with the circumferential surface of the rotating disk; Wherein, the first upper mold base and one of the lower mold bases cooperate to form a first mold cavity for forming a first injection molded part, and the second upper mold base and the other lower mold base cooperate to form a second mold cavity for cooperating with the first injection molded part to form a second injection molded part.

[0006] In an embodiment, the lower mold assembly further includes: A driving part, located at the side of the main body. The driving part has a driving rod capable of performing linear reciprocating motion; and, A gear and a rack, the gear being fixed to the lower end of the rotating disc, the rack meshing with the gear, and the rack being fixedly connected to the driving rod.

[0007] In one embodiment, there are two racks, and the two racks are respectively disposed on opposite sides of the gear; The driving rod is connected to one of the racks.

[0008] In one embodiment, two guiding structures are provided, and the two guiding structures are respectively disposed at the upper end and the lower end of the main body.

[0009] In one embodiment, the circumferential side surface of the rotating disc is provided with steps to form a first section and a second section that go from bottom to top and have gradually decreasing outer diameters; A plurality of guiding portions of one of the guiding structures are in contact with the outer wall of the second section, and a plurality of guiding portions of the other guiding structure are in contact with the outer wall of the first section.

[0010] In one embodiment, a groove is provided in the middle of the upper end surface of the main body; The rotating disc is rotatably mounted in the groove.

[0011] In one embodiment, the two-color product forming mold further includes a plurality of limiting structures spaced apart along the circumferential direction of the rotating disc, and each of the limiting structures includes: A limiting groove provided on the circumferential side surface of the rotating disc; and, A limiting member movably mounted on the main body, the limiting member being capable of moving towards or away from the rotating disc so as to be able to extend into the limiting groove during the movement to abut against the rotating disc.

[0012] In one embodiment, the limiting groove penetrates through the rotating disc upwards; One side of the limiting member facing the rotating disc is provided with steps to form a limiting convex portion, the limiting convex portion being used to extend into the limiting groove, and the limiting convex portion being flush with the upper end surface of the rotating disc.

[0013] In one embodiment, a groove is provided in the middle of the upper end surface of the main body, and a plurality of guiding grooves communicating with the groove are further provided on the upper end surface of the main body. The plurality of guiding grooves are arranged along the circumferential direction of the groove and extend in the radial direction of the rotating disc; The rotating disc is rotatably mounted in the groove; A plurality of the limiting members are respectively slidably mounted in the plurality of guiding grooves, and an inclined hole that slopes away from the rotating disc from top to bottom is provided at the upper end of each of the limiting members; 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.

[0014] In one embodiment, 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 up and down directions. The pushing portion is arranged on the base of the main body or the injection molding machine and has an active stroke along the up and down 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.

[0015] In one embodiment, 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 seat; and / or, 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 to the rack, the gear is fixed to the middle part of the lower end of the rotating disk and meshes with the gear, and the pushing part is located on the side of the rack facing away from the gear; In one embodiment, two cooling water circulation paths are arranged opposite to each other on the rotating disk corresponding to the two lower mold seats, and 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 mold assembly can be detachably installed and is used to cooperate with the nozzle on the single-color injection molding machine.

[0016] In the technical solution of the present invention, the rotation of the rotating disk can drive the position change of the two lower die bases, so that each lower die base has two mating positions, so that one of the lower die bases is mated with the first upper die base to form a first mold cavity for molding the first injection molded part. After the rotating disk rotates, the lower die base carrying the first injection molded part is mated with the second upper die base to form a second mold cavity for molding the second injection molded part. Thus, a combined part in which the first injection molded part and the second injection molded part are combined into one is obtained through secondary injection molding. Since when the upper die base and the lower die base are closed, the two upper die bases and the two lower die bases are closed synchronously, two kinds of materials can be injected synchronously during the stable production process. Thus, after the upper die set and the lower die set are opened, a first injection molded part and a second injection molded part can be obtained simultaneously. Among them, the second injection molded part is attached to the first injection molded part, that is, the combined part can be obtained after the second injection molded part is molded. After taking out the combined part, driving the rotating disk to rotate 180° and then closing the mold for processing can obtain a new combined part when the mold is opened next time. It has a wide range of applications, can be applied to all two-color products, greatly reduces the machine investment cost, has stronger flexibility and high production efficiency. At the same time, a plurality of guiding parts are arranged to contact the rotating disk through an arc-shaped mating surface, and the guiding parts and the rotating disk are precisely machined to limit the rotational friction between the two, so that the plurality of guiding parts together perform the function of guiding and correcting the rotating disk, ensuring the rotational stability of the rotating disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0018] Figure 1 Schematic cross-sectional view of an embodiment of a two-color product molding die provided by the present invention; Figure 2 For Figure 1 Schematic structural view of the driving part cooperating with the gear rack in ; Figure 3 For Figure 1 Schematic structural view of the rotating disk cooperating with the guiding structure in ; Figure 4 For Figure 1 Schematic structural view of the limiting structure in ; Figure 5 For Figure 4 Schematic structural view of the limiting part in ; Figure 6 For Figure 1 Schematic structural view of the limiting part cooperating with the rotating disk in.

[0019] Description of the attached reference numerals: 100, two-color product forming mold; 1, upper mold unit; 11, upper template; 12, upper mold base; 121, first upper mold base; 122, second upper mold base; 13, inclined rod; 2, lower mold unit; 21, main body; 211, groove; 212, guide groove; 22, rotating disk; 221, first section; 222, second section; 23, lower mold base; 24, driving part; 25, gear; 26, rack; 3, guiding structure; 31, guiding part; 4, limiting structure; 41, limiting groove; 42, limiting part; 421, limiting convex part; 422, inclined hole; 5, pushing part.

[0020] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that if there are directional indications involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0023] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0024] For existing two-color products, they are generally formed by separate injection molding, and then need to go through processes such as turnover, painting and manual assembly. Taking the air-conditioning panel assembly as an example, it is necessary to separately injection-mold the upper panel and the lower panel. After injection molding, the lower panel needs to be transferred to a painting factory for painting, and then transferred again for manual assembly to make the upper panel and the lower panel into an assembly. This process has low efficiency, pollution exists during the turnover process, and manual assembly is prone to product scrapping due to improper operation.

[0025] Some current two-color products are realized by two-color injection molding. Two-color injection molding means that two plastic materials are injection molded on the same injection molding machine in two separate processes. It is an injection molding technology that can simplify the assembly process and improve the appearance grade of products. However, two-color injection molding usually requires a special two-color injection molding machine. The price of a two-color injection molding machine is 2-3 times that of an ordinary single-color injection molding machine of the same tonnage, and the processing cost is 3 times that of a single-color machine of the same tonnage. Moreover, the production flexibility is limited and it cannot be adapted to single-color products.

[0026] In order to eliminate the need for a two-color injection molding machine, some methods have emerged that can form two-color plastic parts through core-pulling, translation, rotation and other position-changing actions. In an existing two-color mold structure produced by a single-color machine, after the first injection molding is completed, the insert of the core-pulling mechanism retracts to create space, and the second injection molding part is formed within the space created by the retraction of the insert, thus realizing the formation of two-color products. However, in this technology, the first injection molding part and the second injection molding part are carried out separately, wasting the cycle time and resulting in a high product processing cost. Since the mold structure mainly forms the second injection molding part using the space created by the retraction of the insert, the shape of the second injection molding part is the shape of the space created by the retraction of the insert, and it can only be applied to specific products, with a small product application range. Also, limited by the core-pulling action of this technology, the core-pulling retraction needs to overcome part of the clamping pressure, and it is extremely easy for the core-pulling to get stuck due to factors such as clamping pressure and temperature changes.

[0027] Another existing single-cavity two-color mold can avoid obstacles by opening the moving mold twice, and then the oil cylinder drives the sliding plate to drive the replacement insert to translate and change positions. The replaced insert and the first injection molding part form the second cavity to realize the formation of two-color products. However, in this technology, the first injection molding part and the second injection molding part are carried out separately, wasting the cycle time and resulting in a high product processing cost. The first injection molding part and the second injection molding part cannot be injection molded simultaneously, wasting the cycle time and resulting in a high product processing cost. Since the second cavity is formed by the replaced insert and the first injection molding part, the shape of the second injection molding part will inevitably be covered by the replaced insert, so the second injection molding part cannot form complex shapes, and the product application range is small. At the same time, the mold needs to meet special arrangements to achieve two-color injection molding. Since the replacement insert needs to change positions to achieve two-color injection molding, 3 positions on the mold are required to accommodate the replacement insert, two positions are used to place the replacement insert, and one position is in the waiting area, waiting to place the replacement insert after translation and position change. Only one of the 3 positions participates in product molding, the mold has extremely high restrictions, and the replacement insert is prone to breakage during the process of changing positions and secondary mold clamping.

[0028] The above-mentioned first injection molding part is a product formed by injecting rubber material through an injection molding machine first, and the second injection molding part is a product formed by injecting rubber material through an injection molding machine again on the basis of the first injection molding part.

[0029] Based on the above situation, the present invention provides a two-color product forming 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 of the lower mold base is changed by the rotation of the rotating disk, which is more flexible.

[0030] Please refer to Figures 1 to 2 , the two-color product forming mold 100 includes an upper mold group 1 and a lower mold group 2. The upper mold group 1 includes an upper template 11 and two upper mold bases 12. The two upper mold bases 12 are arranged at intervals in the horizontal direction at the lower end of the upper template 11. The two upper mold bases 12 include a first upper mold base 121 and a second upper mold base 122 for corresponding to injecting two kinds of materials. The upper template 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 be fixed to the bottom plate of the injection molding machine. The rotating disk 22 is rotatably installed on the main body 21 along the axis extending in the up and down direction. The two lower mold bases 23 are arranged at intervals in the horizontal direction on the rotating disk 22, 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 turn. Among them, the first upper mold base 121 cooperates with one of the lower mold bases 23 to form a first mold cavity for forming the 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 form the second injection molded part.

[0031] 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 forming the first injection molded part. After the rotating disk 22 rotates, the lower mold base 23 carrying the first injection molded part is combined with the second upper mold base 122 to form a second mold cavity for forming the second injection molded part, so that a combined part in which the first injection molded part and the second injection molded part are combined into one body is obtained through secondary injection molding. Since when the upper mold base 12 and the lower mold base 23 are combined, the two upper mold bases 12 and the two lower mold bases 23 are combined synchronously, two kinds of materials can be injected synchronously during stable production. Therefore, after the upper mold group 1 and the lower mold group 2 are opened, a combined part in which both kinds of materials are injection molded and a part in which only one kind of material is injection molded can be obtained at the same time. After driving the rotating disk 22 to rotate 180° and then closing the mold for processing, a new combined part can be obtained when the mold is opened next time. It has a wide range of applications, can be applied to all two-color products, greatly reduces the machine investment cost, has stronger flexibility and high production efficiency. At the same time, a plurality of guiding parts 31 are arranged to contact the rotating disk 22 through an arc-shaped mating surface, and the guiding parts 31 and the rotating disk 22 are precisely processed to limit the rotational friction between the two, so that the plurality of guiding parts 31 together perform the function of guiding and correcting the rotating disk 22 to ensure the rotational stability of the rotating disk 22.

[0032] Since the rotating disk 22 is a movable part, there is a gap in its cooperation with the main body 21. The contact between each arc-shaped mating surface and the circumferential side surface of the rotating disk 22 can ensure the smooth rotation of the rotating disk 22, so that the multiple guiding parts 31 jointly perform the function of guiding and correcting the rotating disk 22.

[0033] Specifically, this 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, so as to realize two-color injection molding with a single-color injection molding machine. The upper mold set 1 is detachably installed, so that it can adapt to the nozzle and runner design on the single-color injection molding machine. Using a single-color injection molding machine to realize two-color injection molding has no limitations, can be applied to all two-color products, greatly reduces the machine investment cost and has stronger flexibility and high production efficiency.

[0034] The cavities of the first upper mold base 121 and the second upper mold base 122 for injecting different materials should be set differently to adapt to the material shrinkage rate and molding profile of different materials. During a stable injection molding process, the first upper mold base 121 is used to close the mold with the empty lower mold base 23 to form a part, and the second upper mold base 122 is used to close the mold with the lower mold base 23 carrying the part to form an assembly.

[0035] Initially, both lower mold bases 23 are in an empty state. The upper mold set 1 and the lower mold set 2 move relative to each other so that the two upper mold bases 12 and the two lower mold bases 23 are closed and mated. The first upper mold base 121 injects, and the second upper mold base 122 does not inject. After mold opening, the lower mold base 23 that cooperates with the first upper mold base 121 is attached with a thermoset-molded part, that is, the first injection molded part. The lower mold base 23 that cooperates with the second upper mold base 122 is still empty. Then the rotating disk 22 rotates 180°, causing the positions of the two lower mold bases 23 to change. 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 inject different materials respectively. When the lower mold base 23 originally 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 mold opening again, the lower mold base 23 corresponding to the first upper mold base 121 is attached with the first injection molded part, and the lower mold base 23 corresponding to the second upper mold base 122 is attached with an assembly. After taking away the assembly, the process of rotating the rotating disk 22 and closing the mold for injection molding is repeated, so that an assembly can be taken away from the lower mold base 23 corresponding to the second upper mold base 122 after each mold opening.

[0036] Although there is a sequence in the injection molding of the first injection molded part and the second injection molded part for the assembly, for the mold structure, the first injection molded part and the second injection molded part can be injection molded simultaneously. Except for the first injection molding, each time the mold is opened after injection molding, a pick-up of the assembly can be completed. Thus, the first injection molded part and the second injection molded part can be injection molded simultaneously through spatial dislocation, saving the cycle time and improving the efficiency.

[0037] Regarding the rotational mating mode of the main body 21 and the rotating disk 22, the rotating disk 22 can be arranged 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. Such an arrangement can make reasonable use of space and is beneficial to reducing the overall height of the mold.

[0038] The present invention does not limit the rotational driving form of the rotating disk 22, which can be achieved by electric drive rotation. Considering that the injection molding process will bring high temperature, in some embodiments, the lower mold set 2 further 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 inside the mold structure but is exposed outside the mold structure. The driving part 24 has a driving rod that can reciprocate horizontally. The gear 25 is fixed to the middle of the lower end of the rotating disk 22, the rack 26 meshes with the gear 25, and the rack 26 is fixedly connected to the driving rod. By controlling the driving rod to reciprocate horizontally to drive the displacement of the rack 26, the rotation of the gear 25 can be driven.

[0039] Specifically, the driving part 24 is set as an oil cylinder, and the driving rod corresponds to the hydraulic rod of the oil cylinder. The extending direction of the driving rod should be consistent with the extending direction of the rack 26.

[0040] It should be noted that the connection between the gear 25 and the rotating disk 22 can be achieved through an adapter block. For the linear guiding of the rack 26, a track groove can be correspondingly arranged inside the main body 21 for the installation of the rack 26.

[0041] Furthermore, there are two racks 26, which are respectively arranged on the 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 used as the active drive, and the other rack 26 moves passively. Thus, when the rack 26 meshes with the gear 25, the bearing capacity on both sides of the gear 25 can be ensured, preventing the rotating disk 22 from shaking during the process of being driven to rotate.

[0042] It should be understood that since the rotation of the rotating disk 22 drives the position change of the two lower mold bases 23, the two lower mold bases 23 should be symmetrically arranged.

[0043] Based on the above embodiments, 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 structure of the rotating disk 22 can be led out to the main body 21 through the rotating shaft, and the inlet and outlet pipes are connected to the main body 21, so as to prevent the problems of winding of the inlet and outlet pipes caused by the rotation of the rotating disk 22 and the problem of the water pipes being damaged by the mold clamping.

[0044] Specifically, the rotating disk 22 is respectively provided with independent cooling water circulation channels corresponding to the two lower mold bases 23. After the rotating disk 22 rotates, the two cooling water circulation channels can still be connected to the corresponding water pipes of the single-color injection molding machine. Specifically, each cooling water circulation channel has at least one water inlet and at least one water outlet. By arranging channels on the rotating shaft, the water inlet and the water outlet are integrated on the rotating shaft. At this time, a plurality of inlet pipes and a plurality of outlet pipes of the injection molding machine are connected to the 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 stored in the cooling water circulation channel, the stored water will not circulate. After the rotating disk 22 rotates to a position, even if the corresponding relationship between the water inlet, the water outlet, the inlet pipe and the outlet pipe changes due to the rotation, but since the two cooling water circulation channels are arranged oppositely, the water inlet or the water outlet of one of the lower mold bases 23 will correspond to the original inlet pipe and outlet pipe of the other lower mold base, and the cooling cycle will still not be affected.

[0045] It should be noted that a corresponding sealing sleeve is provided to prevent water leakage during the connection and cooperation of the pipelines.

[0046] Furthermore, the upper end of the rotating disk 22 can be set to protrude from the main body 21. At this time, the guiding part 31 is arranged on the corresponding end face of the main body 21 and abuts against the protruding part of the rotating disk 22. Or a groove 211 can be arranged 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 to provide a place for the guiding part 31 to be embedded and installed. At this time, the end of the guiding part 31 is in the gap between the inner wall of the groove 211 and the rotating disk 22.

[0047] It should be understood that the material of the mold structure is generally a metal material. The material of the guiding part 31 can be a metal or a high-temperature resistant polymer material, and the present invention does not limit this.

[0048] The number of the guiding 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.

[0049] Furthermore, two guiding structures 3 are provided, and the two guiding structures 3 are respectively arranged at the upper end and the lower end of the main body 21. Through the design of the upper and lower guiding parts 31, the rotation stability of the rotating disk 22 can be ensured. It should be understood that the guiding part 31 at the upper end and the guiding part 31 at the lower end can be arranged opposite to each other or staggered. The number of the guiding parts 31 in the two guiding structures 3 can be the same or different.

[0050] During the rotation of the rotating disk 22, there are two stopping positions. In this embodiment, guide posts are designed on the rotating disk 22 to ensure the accurate reset of the rotating disk 22. Even if there is a fitting clearance in the fitting structure of the gear 25 and the rack 26, the design of the guide posts can also limit the accurate positioning of the two stopping positions during mold closing. It should be noted that multiple guide posts are provided. A part of the multiple guide posts is arranged on the rotating disk 22, and is arranged in the circumferential direction and is staggered from the lower mold base 23. Another part of the multiple guide posts is arranged on the main body 21, so as to perform mold closing positioning through the inner guide posts and perform linear guiding during the mold opening and mold closing processes through the outer guide posts.

[0051] Please refer to Figures 3 to 4 , the circumferential side surface of the rotating disk 22 is provided with steps to form a first section 221 and a second section 222 that go from bottom to top and have gradually decreasing outer diameters. The multiple guiding parts 31 of one guiding structure 3 are in contact with the outer wall of the second section 222, and the multiple guiding parts 31 of the other guiding structure 3 are in contact with the outer wall of the first section 221. That is, the side surfaces of the guiding structure 3 on the upper side and the guiding structure 3 on the lower side in contact with the rotating disk 22 are provided with steps. Such a setting can limit the rotation path of the rotating disk 22 in two dimensions, thereby achieving a better stable effect.

[0052] It should be understood that since the outer diameter of the rotating disk 22 is variably set, the gap between the rotating disk 22 and the inner wall of the groove 211 also changes, that is, the dimensions of the guiding part 31 at the upper end and the guiding part 31 at the lower end extending into the groove 211 are different.

[0053] Specifically, the outer diameter of the rotating disk 22 can be changed by processing, or in an assembled form, that is, the rotating disk 22 itself is composed of multiple plates. In this way, it is convenient for local hollowing out and can reduce the processing difficulty. At this time, the outer diameters of the multiple plates are set differently.

[0054] Considering that the rotating disk 22 is a movable part and its movement drive is independent of the injection molding equipment. Because, in order to ensure the fixed position of the rotating disk 22 during mold closing, in some embodiments, the two-color product molding die 100 further includes a plurality of limiting structures 4 arranged at intervals along the circumferential direction of the rotating disk 22. Each limiting structure 4 includes a limiting groove 41 and a limiting member 42. The limiting groove 41 is arranged on the circumferential side surface of the rotating disk 22; the limiting member 42 is movably installed on the main body 21, and the limiting member 42 can move towards or away from the rotating disk 22 so as to be able to extend into the limiting groove 41 during the movement process to abut against the rotating disk 22. When the rotating disk 22 rotates to two stop positions, it is necessary to ensure that the plurality of limiting members 42 and the plurality of limiting grooves 41 correspond to each other one by one along the radial direction of the rotating disk 22, so as to be able to drive the limiting member 42 to move into and engage with the limiting groove 41, thereby locking the rotating disk 22 through the engagement of the plurality of limiting members 42 and the plurality of limiting grooves 41, ensuring that the rotating disk 22 does not move during the injection molding process, and the plurality of limiting members 42 retract during mold opening to separate from the limiting groove 41, so as to ensure that the rotation action of the rotating disk 22 is not affected.

[0055] The limiting groove 41 can be a stepped groove, a T-shaped groove, a U-shaped groove or an arc-shaped groove, and the present invention does not limit this, and the limiting member 42 can be correspondingly arranged. In this embodiment, please refer to Figures 5 to 6 , the limiting groove 41 penetrates through the rotating disk 22 upward, which is convenient for processing. The side of the limiting member 42 facing the rotating disk 22 is stepped to form a limiting convex portion 421, and the limiting convex portion 421 is used to extend into the limiting groove 41, and the limiting convex portion 421 is flush with the upper end surface of the rotating disk 22. The limiting member 42 is integrally stepped, and can also be limited by its own stepped structure when cooperating with the limiting groove 41. The stepped surface on the outer side of the limiting member 42 abuts against the circumferential side surface of the rotating disk 22 to form mechanical limitation, thereby limiting the stop position of the limiting member 42. The limiting member 42 is flush with the rotating disk 22, which can avoid interference caused by the limiting member 42 during mold closing. The flush setting can also be used as the detection of the position of the limiting member 42. If it can be observed that the limiting member 42 protrudes from the rotating disk 22, it means that there is a large material expansion or installation position difference of the limiting member 42.

[0056] 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 communicating with the groove 211 are further provided on the upper end surface of the main body 21. The plurality of guide grooves 212 are arranged along the circumferential direction 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 limiting members 42 are respectively slidably installed in the plurality of guide grooves 212, and an inclined hole 422 inclined downward away from the rotating disk 22 is formed at the upper end of each limiting member 42; inclined rods 13 corresponding to the plurality of inclined holes 422 are provided on the upper template 11, and the plurality of inclined rods 13 can be driven to extend downward into the plurality of inclined holes 422 to drive the plurality of limiting members 42 to approach each other and jointly abut against the rotating disk 22, or be driven upward to disengage from the plurality of inclined holes 422 to drive the plurality of limiting members 42 to separate from the rotating disk 22. During mold closing, the inclined rod 13 extends into the inclined hole 422, so as to drive the plurality of limiting members 42 through the form of inclined wedge cooperation. During separation, reverse driving is performed, so that the plurality of limiting members 42 can be reset. This structural form can associate the driving of the limiting members 42 with the mold opening and closing actions, and the structural cooperation is more compact. At the same time, it is beneficial to reduce the number of mold parts.

[0057] It should be noted that the guide groove 212 can be set as an inverted T-shaped groove, and the outside of the limiting member 42 is correspondingly arranged, so as to achieve the effect of preventing detachment.

[0058] In other embodiments, a spring structure can be provided to control the movement and reset of the limiting member 42, and the present invention will not elaborate on this.

[0059] After each lower die base 23 is successively matched with the first upper die base 121 and the second upper die base 122 for injection molding, a combined part in which the first injection molded part and the second injection molded part are combined into one is obtained. The combined part is attached to the corresponding lower die base 23. In order to facilitate the demolding of the combined part, in some embodiments, the rotating disk 22 is provided with through holes corresponding to each lower die base 23; the two-color product molding die 100 further includes a pushing part 5 correspondingly arranged in the up-down direction with the second upper die base 122. The pushing part 5 is arranged on the main body 21 or the base of the injection molding machine and has a moving stroke along the up-down direction. The pushing part 5 can pass through the through hole upward to jack up the combined part to separate it from the corresponding lower die base 23. When designing the ejection structure, the pushing part 5 is arranged 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 pushing part 5 is always below the second upper die base 122, avoiding the synchronous movement of the pushing part 5 along with the rotation of the rotating disk 22. Each lower die base 23 can be driven by the rotating disk 22 to be matched with the second upper die base 122 for injection molding of the combined part. Therefore, when the mold is opened each time, the lower die base 23 located below the second upper die base 122 is different. Therefore, the rotating disk 22 needs to be provided with through holes corresponding to each lower die base 23. At the two stopping positions of the rotating disk 22, there is a through hole corresponding to the pushing part 5, so that when the mold is opened, the pushing part 5 can be controlled to pass through the corresponding through hole to drive the combined part to separate from the lower die base 23, so as to realize automatic demolding.

[0060] 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 and demold a combined part. Correspondingly, the rotating disk 22 is provided with two through holes corresponding to each lower die base 23.

[0061] When the rotating disk 22 realizes rotational drive through the mutually matched 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, so as to avoid structural interference and at the same time ensure a larger placement space.

[0062] 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 die 100 is as follows: Step 1: Both lower die bases 23 are in a vacant state. The upper die set 1 and the lower die set 2 move relative to each other to achieve mold closing, and only the first upper die base 121 performs injection molding. After mold opening, the lower die base 23 that cooperates with the first upper die base 121 is attached with a thermosetting formed lower panel. Then, the rotating disk 22 rotates 180°. The lower die base 23 carrying the lower panel is transferred to correspond to the second upper die base 122, and the vacant lower die base 23 is transferred to correspond to the first upper die base 121. The mold is closed again, and the first upper die base 121 and the second upper die base 122 inject different materials respectively. After mold opening, the lower die base 23 corresponding to the first upper die base 121 is attached with a lower panel, and the lower die base 23 corresponding to the second upper die base 122 is attached with a combination of an upper panel and a lower panel. Step 2: After the combination is taken away, the corresponding lower die base 23 is vacant. Control the rotating disk 22 to rotate 180° again. The lower die base 23 carrying the lower panel is transferred to correspond to the second upper die base 122, and the vacant lower die base 23 is transferred to correspond to the first upper die base 121. The mold is closed again, and the first upper die base 121 and the second upper die base 122 inject different materials respectively. After mold opening, the lower die base 23 corresponding to the first upper die base 121 is attached with a lower panel, and the lower die base 23 corresponding to the second upper die base 122 is attached with a combination of an upper panel and a lower panel.

[0063] Repeat Step 2, and a combination of an upper panel and a lower panel can be obtained after each mold opening.

[0064] In the technical solution of the present invention, a single-color injection molding machine can be used to achieve two-color injection molding. The cavities of the two lower die bases 23 are set to be the same. The first upper die base 121 and the second upper die base 122 are used to inject different materials respectively to match with the lower die 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 realized. The rotating disk 22 is driven to rotate by an oil cylinder, and a supporting ejection system is provided. Therefore, all functions of a two-color injection molding machine can be realized. The injection of the two materials can be carried out simultaneously without limitations, and it can be applied to all two-color products that meet the material characteristics, reducing the machine investment cost and having stronger flexibility. In addition, the mold cost of a single mold carrying the rotating disk 22 is reduced to varying degrees compared with the two sets of molds for conventional two colors. When there is no two-color production requirement, the die set can be removed and replaced to produce the original single-color products.

[0065] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A two-color product forming mold, characterized in that, Comprising: An upper module, including an upper template and two upper die bases. The two upper die bases are spaced apart and arranged at the lower end of the upper template. The two upper die bases include a first upper die base and a second upper die base for correspondingly injecting two kinds of materials. The upper template is used to be fixed to the top plate of the injection molding machine; A lower module, located below the upper module. The lower module includes a main body, a rotating disk, and two lower die 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 up-and-down direction. The two lower die bases are spaced apart and arranged on the rotating disk, so that during the rotation of the rotating disk, each of the lower die bases is driven to correspond to the two upper die bases in sequence; and A guiding structure, including a plurality of guiding parts. The plurality of guiding parts are fixed to the main body and are arranged around the circumference of the rotating disk. An arc-shaped mating surface is formed at the side end of each guiding part facing the rotating disk. The arc-shaped mating surface is used to be adapted to the outer shape of the rotating disk. The plurality of arc-shaped mating surfaces are in contact with the circumferential side surface of the rotating disk; Wherein, the first upper die base and one of the lower die bases cooperate to form a first mold cavity for molding a first injection molded part, and the second upper die base and the other lower die base cooperate to form a second mold cavity for cooperating with the first injection molded part to mold a second injection molded part.

2. The two-color product forming mold according to claim 1, characterized in that, The lower module further includes: A driving part, located at the side of the main body. The driving part has a driving rod capable of performing linear reciprocating movement; and A gear and a rack. The gear is fixed to the lower end of the rotating disk. The rack meshes with the gear, and the rack is fixedly connected to the driving rod.

3. The two-color product forming mold according to claim 2, wherein There are two racks, and the two racks are respectively arranged on 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, There are two guiding structures, and the two guiding structures are respectively arranged at the upper end and the lower end of the main body.

5. The two-color product forming die according to claim 4, wherein, The circumferential side surface of the rotating disk is provided with steps to form a first section and a second section from bottom to top with gradually decreasing outer diameters; The plurality of guiding parts of one of the guiding structures are in contact with the outer wall of the second section, and the plurality of guiding parts of the other guiding structure are in contact with the outer wall of the first section.

6. The two-color product forming mold according to claim 1, wherein, A groove is provided in the middle of the upper end surface of the main body; The rotating disk is rotatably mounted in the groove.

7. The two-color product forming die according to claim 1 or 6, 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 includes: A limiting groove, provided on the circumferential side surface of the rotating disk; and A limiting member, movably mounted to the main body. The limiting member can move in a direction close to or away from the rotating disk, so that it can extend into the limiting groove during the movement to abut against the rotating disk.

8. The two-color product forming mold according to claim 7, wherein The limiting groove penetrates through the rotating disk upward; One side of the limiting member facing the rotating disk is provided with steps to form a limiting convex part. The limiting convex part is used to extend into the limiting groove, and the limiting convex part is flush with the upper end surface of the rotating disk.

9. The two-color product forming mold according to claim 7, characterized in that, A groove is provided in the middle of the upper end surface of the main body. A plurality of guiding grooves communicating with the groove are further provided on the upper end surface of the main body. The plurality of guiding grooves are arranged along the circumference of the groove and extend in the radial direction of the rotating disk; The rotating disk is rotatably installed in the groove; The plurality of stoppers are slidably mounted in the plurality of guide grooves respectively, and an upper end of each stopper 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.

10. The two-color product forming mold according to claim 1, characterized in that, The rotating disk is provided with through holes 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 up and down directions. The pushing portion is arranged on the base of the main body or the injection molding machine and has an active stroke along the up and down 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.

11. The two-color product forming mold according to claim 10, characterized in that, The 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 seat; 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 that is away from the gear.

12. The two-color product forming mold according to claim 1, characterized in that, Two cooling water circulation paths are arranged on the rotating disk corresponding to the two lower mold seats, and 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 mold assembly can be detachably installed and is used to cooperate with the nozzle on the single-color injection molding machine.

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