Injection mold assembly equipment and control method thereof

Abstract

The present invention discloses an in-mold assembly device for injection molded parts and a control method thereof, relating to the field of injection molding technology. The in-mold assembly device for injection molded parts includes a machine, multiple mold assemblies, and a push assembly. The machine includes a first base body and a second base body arranged in a vertically opposed relationship. The first base body includes an assembly station. The second base body includes an assembly station corresponding to the first base body and multiple waiting assembly stations. The second base body is movably arranged in a horizontal direction. Each mold assembly includes an upper mold base and a lower mold base arranged in a vertically opposed relationship. The push assembly includes at least one second pusher mounted to the machine in a vertically movable manner. The second pusher is located at an assembly station of the second base body. After the second base body moves to drive the position conversion of multiple lower mold bases, the second pusher moves to drive the parts of the second base body located at the assembly stations of the second base body to be assembled with the parts of the first base body. This allows the machine to accommodate combinations of three or more parts.

Description

Technical Field

[0001] The present invention relates to the field of injection molding technology, in particular to an injection molded part in-mold assembly device and a control method thereof. Background Art

[0002] Injection molded parts involving multiple components in home appliances are typically processed separately, transported to a designated area, and assembled manually or with machine assistance. To eliminate subsequent assembly steps, specialized molding processes, such as snap-fit ​​or co-injection of incompatible materials, have emerged to create fully assembled, functional parts. However, these processes present challenges: complex mold movements and limitations on the number of parts that can be assembled. Assemblies created through multiple injection molding require differences in material shrinkage and molding temperature between the later-molded parts and the earlier ones, significantly limiting the product. Summary of the Invention

[0003] The main purpose of the present invention is to propose an in-mold assembly device for injection molded parts and a control method thereof, which can realize the injection molding and template assembly of injection molded parts including three or more parts, breaking through the limitations of existing equipment on the number of parts and part materials of injection molded parts.

[0004] To achieve the above-mentioned object, the present invention provides an in-mold assembly device for injection molded parts, wherein the injection molded parts include at least three parts, and the in-mold assembly device for injection molded parts includes:

[0005] The machine includes a first base and a second base arranged relative to each other in the vertical direction, the first base and the second base being movable relative to each other under the drive of the injection molding device, the first base including an assembly station, the second base including an assembly station corresponding to the first base and a plurality of to-be-assembled stations, and the second base being movable in the horizontal direction;

[0006] A plurality of mold assemblies for processing a plurality of parts, each of the mold assemblies comprising an upper mold base and a lower mold base disposed relative to each other in the upper and lower directions, the upper mold base and the lower mold base being movable relative to each other, wherein a plurality of the upper mold bases are disposed on the first base body, and at least one of the upper mold bases is located at an assembly station of the first base body, and a plurality of the lower mold bases are disposed at an assembly station of the second base body and at a plurality of stations to be assembled; and

[0007] The pushing assembly includes at least one second pushing part movably mounted to the machine table in the up and down directions, the second pushing part being located at the assembly station of the second base body. After the second base body moves to drive the position conversion of the plurality of lower mold bases, the second pushing part moves to drive the parts located at the assembly station of the second base body to be assembled into one with the parts on the first base body.

[0008] In one embodiment, the plurality of mold assemblies include a plurality of first mold assemblies located at the assembly station, the plurality of first mold assemblies are used to form a plurality of identical parts, and the arrangement direction of the plurality of first mold assemblies intersects with the arrangement direction of the plurality of the assembly stations.

[0009] In one embodiment, the plurality of workstations are arranged along a straight line, the assembly workstation and the plurality of workstations to be assembled are arranged along a straight line, and the second seat is movably arranged along the straight line; or,

[0010] The assembly station and the plurality of stations to be assembled are arranged along a circumferential direction, and the second seat body is rotatably arranged along an axis extending in an up-down direction.

[0011] In one embodiment, the machine further comprises a fixed base, the base being located below the second base body, the base being provided with a first ejection channel extending vertically therethrough, the first ejection channel being located at the assembly station;

[0012] The second base body is provided with a plurality of second ejection channels, the plurality of second ejection channels being provided through the second base body in the vertical direction, the plurality of second ejection channels being respectively located at the plurality of the to-be-assembled stations, and each second ejection channel being communicated with the corresponding cavity of the lower die base;

[0013] The second pushing portion is arranged below the base. When the second base body moves so that one of the second ejection channels is connected to the first ejection channel, the second pushing portion can push the part in the corresponding cavity of the lower mold base upward to be assembled into one with the part in the cavity of the upper mold base at the assembly station.

[0014] In one embodiment, a third ejection channel is provided on the assembly station on the first base, and the third ejection channel is connected to the corresponding cavity of the upper mold base;

[0015] The pushing assembly also includes a first pushing portion, which is located above the first base. When the upper mold base and the lower mold base in the assembly station are closed, the first pushing portion can push the parts in the upper mold base downward until they are assembled into one with the parts in the corresponding lower mold base.

[0016] In one embodiment, the second base has a first position and a second position during movement, wherein in the first position, the upper die base and the lower die base in each mold assembly are correspondingly matched, and in the second position, each upper die base is correspondingly matched with the lower die base in the adjacent mold assembly;

[0017] The plurality of lower die bases include a first lower die base, and the first lower die base is provided with a first limiting protrusion;

[0018] When in the first position, the first lower die base is at the assembly station, and the first limiting protrusion can cooperate with the upper die base at the assembly station, so that the first lower die base is tightly fitted with the corresponding upper die base;

[0019] When in the second position, the first lower die base is located at one of the to-be-assembled stations, and the first limiting protrusion can cooperate with the corresponding upper die base so that a padding gap is formed between the first lower die base and the corresponding upper die base.

[0020] In one embodiment, a first matching portion is provided on each of the plurality of upper mold bases at the plurality of the to-be-assembled stations;

[0021] In the second position, the first limiting protrusion can cooperate with a corresponding one of the first matching portions.

[0022] In one embodiment, the first matching portion is configured as a groove or a protrusion;

[0023] At least some of the first matching portions have different sizes in the vertical direction.

[0024] In one embodiment, the first base and the second base are relatively movable to drive the plurality of mold assemblies to engage in mold matching.

[0025] In one embodiment, the injection molded part in-mold assembly device includes a plurality of guide posts and a plurality of guide holes that cooperate with each other, one of the guide posts and the guide holes is disposed on the first base body, and the other is disposed on the second base body;

[0026] The second seat body has a first position and a second position during the movement. In the first position, the upper die seat and the lower die seat in each mold assembly correspond to each other, and the multiple guide pillars and the multiple guide holes correspond one to one. In the second position, each upper die seat corresponds to the lower die seat in the adjacent mold assembly, and at least n guide pillars correspond to the corresponding guide holes, n≥4.

[0027] The present invention also proposes a control method for an in-mold assembly device for injection molded parts. Based on the above-mentioned in-mold assembly device for injection molded parts, the in-mold assembly device for injection molded parts includes a machine platform, multiple mold assemblies and a push assembly, the machine platform includes a first base body and a second base body relatively arranged in the upper and lower directions, the first base body and the second base body can be relatively movably arranged, the first base body includes an assembly station and multiple stations to be assembled, the second base body includes an assembly station corresponding to the first base body and multiple stations to be assembled, the second base body can be movably arranged in the horizontal direction, the multiple mold assemblies are used to process multiple parts, each of the mold assemblies includes an upper mold base and a lower mold base relatively arranged in the upper and lower directions, the The upper die base and the lower die base can be relatively movably arranged under the drive of the first base body and the second base body. In the plurality of mold assemblies, the plurality of upper die bases are arranged at the assembly station and the plurality of to-be-assembled stations of the first base body, and the plurality of lower die bases are arranged at the assembly station and the plurality of to-be-assembled stations of the second base body. The pushing assembly includes at least one second pushing portion movably mounted to the machine table along the up and down directions, and the second pushing portion is located at the assembly station of the second base body. After the second base body moves to drive the position conversion of the plurality of lower die bases, the second pushing portion moves to drive the parts at the assembly station of the second base body to be assembled with the parts on the first base body.

[0028] The control method of the injection molded part in-mold assembly equipment includes the following steps:

[0029] After the plurality of mold assemblies are processed to obtain a plurality of parts, the upper mold bases and the lower mold bases of the plurality of mold assemblies are controlled to separate so that the upper mold base located at the assembly station holds the parts, and the lower mold base located at the to-be-assembled station holds the parts;

[0030] Controlling the second seat to move so as to transfer one of the lower mold bases holding a part to the assembly station;

[0031] After controlling the plurality of mold assemblies to close the mold, controlling the ejection assembly to work so as to combine the parts at the assembly station and place the combined parts at the upper mold base;

[0032] Controlling the second seat to move until the last lower die seat holding a part is transferred to the assembly station;

[0033] When the multiple parts are assembled in the mold, the ejection assembly is controlled to eject the assembled parts onto the lower mold base at the assembly station;

[0034] Control the separation of the plurality of mold assemblies and take out the assembled parts.

[0035] In the technical solution of the present invention, multiple workstations are divided into zones at the same time. Since the second pushing part is correspondingly arranged at the assembly station of the second base body, each time the second base moves to transfer the lower mold base holding the part to the assembly station, one of the parts can be assembled with another part through the up and down movement of the second pushing part after the mold is closed. The in-mold assembly is achieved by relying on the second pushing part instead of relying on the movement of the mold structure, which reduces the movement requirements of the mold. After one mold closing process, the upper mold base of the assembly station of the first base body holds the part, and the lower mold bases of multiple assembly stations of the second base body hold the part, so that the assembly of multiple other parts can be repeated by relying on the movement of the second base body and the cooperation of the second pushing part, which reduces the difficulty of the mold structure and enhances the flexibility of product assembly. This structural form can adapt to the combination of three or more parts and has a wider range of applications. Multiple parts can be independently processed by multiple mold assemblies, and there is no limit on the material shrinkage rate and molding temperature of multiple parts. 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 schematic structural diagram of an embodiment of an in-mold assembly device for injection molded parts (first position) provided by the present invention;

[0038] Figure 2 for Figure 1 A schematic top view of the second seat;

[0039] Figure 3 for Figure 1 A schematic diagram of the structure of the in-mold assembly equipment for injection molded parts (one of the second positions);

[0040] Figure 4 for Figure 1 A schematic diagram of the structure of the in-mold assembly equipment for injection molded parts (another second position);

[0041] Figure 5 for Figure 1 A schematic cross-sectional view of an embodiment of a middle push assembly;

[0042] Figure 6 for Figure 1 A cross-sectional schematic diagram of another embodiment of the middle push assembly;

[0043] Figure 7 for Figure 1Schematic diagram of the cooperation between the first ejection channel and the second ejection channel;

[0044] Figure 8 A schematic flow chart of an embodiment of a control method for in-mold assembly equipment for injection molded parts provided by the present invention;

[0045] Figure 9 for Figure 8 Schematic diagram of the mold state changes in each step.

[0046] Description of Figure Numbers:

[0047] 100. In-mold assembly equipment for injection molded parts; 1. Machine; 1a. Assembly station; 1b. Station to be assembled; 11. First base; 12. Second base; 121. Second ejection channel; 13. Base; 131. First ejection channel; 2. Mold assembly; 21. Upper mold base; 22. Lower mold base; 22a. First lower mold base; 22b. Second lower mold base; 22c. Third lower mold base; 23. First limiting protrusion; 3. Ejection assembly; 31. First ejection portion; 32. Second ejection portion; 4. Guide column.

[0048] 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

[0049] 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.

[0050] 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.

[0051] 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.

[0052] For products composed of multiple parts, the parts are typically processed separately and transported to a designated area for manual or machine-assisted assembly. For example, the shutter switch assembly for a current variable-frequency window machine consists of two connecting rods, six shutters, and a cover. The current process requires separate injection molding of the connecting rods, shutters, and outer frame, followed by manual assembly to create a single assembly. Traditional manual assembly is inefficient, and due to the large number and variety of parts involved, numerous assembly operations are also required, making it easy for the product to be scrapped due to operational issues. Even with specialized assembly jigs, there are still issues with secondary turnover after injection molding and high jig investment costs.

[0053] In order to save the subsequent assembly process, some special molding processes such as snap fit or co-injection have emerged, as follows:

[0054] An existing in-mold assembly injection mold can remove obstacles on the assembly path of two components through the mechanical movement of the cylinder, and then continue to use mechanical movement to complete the in-mold assembly of the two products. However, this technology has a complex mold structure and mold movement and a small scope of application. If another assembly product is added, the mold movement will reach an exaggerated 9, which is only a theoretical possibility and cannot be mass-produced in reality.

[0055] Another existing in-mold assembly technology relies on the different shrinkage rates of two injection molding materials and the incompatibility of co-injection to achieve the rotation effect after assembly. However, this injection molding technology has great limitations. The necessary conditions are that the shrinkage rate of the material of the second injection molding product must be greater than that of the first injection molding product, and the molding temperature of the material of the second injection molding product must be lower than the melting point temperature of the material of the first injection molding product. Therefore, it is limited by materials and is mostly used for the combination of two products. When the types of assembled products are expanded to 3 or more, it is difficult to find 3 materials that meet the above conditions.

[0056] Another existing in-mold assembly technology is to complete product assembly by ejecting the product from the dynamic and static molds simultaneously after injection molding, rotating it to a specified position for welding. However, the components produced by this technology cannot achieve relative displacement between products, and the product needs to be rotated after ejection to change its position. Only two products can be assembled at most, and the position combination is limited, making it impossible to assemble multiple products.

[0057] Based on the above situation, the present invention provides an injection molded part in-mold assembly device and a control method thereof, which realizes the assembly of three or more products, breaking through the existing in-mold assembly mode that is usually only applicable to the assembly of two products.

[0058] Please refer to Figures 1 to 3 The injection molded part in-mold assembly equipment 100 includes a machine 1, a plurality of mold assemblies 2 and a push assembly 3. The machine 1

[0059] There are multiple stations arranged at intervals, including: machine 1

[0060] The first base body 11 and the second base body 12 are relatively arranged in the upper and lower directions. The first base body 11 and the second base body 12 can move relatively under the drive of the injection molding equipment. The first base body 11 includes an assembly station. The second base body 12 includes an assembly station 1a corresponding to the first base body 11 and a plurality of to-be-assembled stations 1b. The second base body 12 can be movably arranged in the horizontal direction. A plurality of mold assemblies 2 are used to process a plurality of parts. Each mold assembly 2 includes an upper mold base 21 and a lower mold base 22 relatively arranged in the upper and lower directions. The upper mold base 21 and the lower mold base 22 can be relatively movably arranged. In the plurality of mold assemblies 2, a plurality of upper mold bases 21 and a plurality of lower mold bases 22 can be relatively movably arranged. The mold base 21 is arranged on the first base body 11, and at least one is located at the assembly station 1a of the first base body 11. Multiple lower mold bases 22 are arranged at the assembly station 1a of the second base body 12 and multiple to-be-assembled stations 1b; the pushing assembly 3 includes at least one second pushing portion 32 movably mounted to the machine 1 along the up and down directions. The second pushing portion 32 is located at the assembly station 1a of the second base body 12. After the second base body 12 moves to drive the position conversion of the multiple lower mold bases 22, the second pushing portion 32 moves to drive the parts at the assembly station 1a of the second base body 12 to be assembled into one with the parts on the first base body 11.

[0061] In the technical solution of the present invention, multiple workstations are divided into zones at the same time. Since the second pushing portion 32 is correspondingly arranged at the assembly station 1a of the second base body 12, each time the second base 13 moves, the lower mold base 22 holding the part is transferred to the assembly station 1a. After the mold is closed, the second pushing portion 32 can be used to drive one of the parts to be assembled with another part by moving up and down. The in-mold assembly is achieved by relying on the second pushing portion 32 instead of relying on the movement of the mold structure, which reduces the movement requirements of the mold. After one mold closing process, the upper mold base 21 of the assembly station 1a of the first base body 11 holds the part, and the lower mold base 22 of multiple assembly stations 1b of the second base body 12 holds the part, so that the assembly of multiple other parts can be repeated by relying on the movement of the second base body 12 and the cooperation of the second pushing portion 32, which reduces the difficulty of the mold structure and enhances the flexibility of part assembly. This structural form can adapt to the combination of three or more parts and has a wider range of applications. Multiple parts can be independently processed by multiple mold assemblies 2, and there is no limit on the material shrinkage rate and molding temperature of multiple parts.

[0062] It should be noted that the assembly station of the first base body 11 and the assembly station of the second base body 12 always correspond in the up and down directions. For example, the assembly station of the first base body 11 is in the middle. Initially, the first base body 11 and the second base body 12 are in correspondence with each other. At this time, the assembly station of the second base body 12 corresponds to the middle part. After the second base body 12 moves, the side end of the second base body 12 corresponds to the middle part of the first base body 11. At this time, the assembly station of the second base body 12 corresponds to its side end.

[0063] Please refer to Figure 9 Initially, the first base body 11 and the second base body 12 are opposite to each other in the upper and lower directions, and the upper die base 21 and the lower die base 22 of each mold assembly 2 correspond one to one. The push assembly 3 does not work. After controlling the multiple mold assemblies 2 to close the mold, the multiple mold assemblies 2 are respectively formed to obtain multiple parts. The types of the multiple parts include at least three types. After the mold is opened, the first base body 11 has parts on the upper die base 21 at the assembly station 1a, and the other upper die bases 21 are unloaded. The second base body 12 has parts on the lower die base 22 at the assembly station 1a, and the second base body 12 has parts on the lower die base 22 at multiple stations to be assembled 1b. At this time, the first stage of processing is completed. By changing the horizontal orientation of the second base 12, multiple lower mold bases 22 can be driven to change positions, and the lower mold base 22 holding the parts originally in the assembly station 1b is transferred to the assembly station 1a. The equipment closes the mold again, and the second pushing portion 32 pushes the parts upward to complete the in-mold assembly of two parts, or the in-mold assembly of parts and assemblies, until all the lower mold bases 22 holding parts are transferred to the assembly station 1a in turn for in-mold assembly, completing the second stage of processing and obtaining the assembled injection molded parts.

[0064] It should be understood that after the first mold opening, the parts of the assembly station 1a of the first base body 11 and the parts of the to-be-assembled station 1b of the second base body 12 should be in different orientations, so that the positions of the parts of the assembly station 1a of the first base body 11 can be kept unchanged during the movement of the second base body 12, and the parts of the to-be-assembled station 1b are located at the lower mold base 22, so that they can be moved away by the second base body 12 to complete the position change.

[0065] It should be noted that the injection molding of the injection molding equipment is generally performed from the upper mold, so the glue channel and the glue injection port are both in the upper mold. Therefore, the second base body 12 is provided to be movable, which lowers the requirements for the mold structure.

[0066] It should be noted that this can be achieved with a conventional single-color injection molding machine and a runner system, that is, by adding a nozzle to the single-color injection molding machine.

[0067] The present invention does not limit the arrangement of the multiple workstations. For example, if the multiple workstations are arranged along a straight line, that is, the assembly station 1a and the multiple pre-assembly stations 1b are arranged along a straight line, then the second base 12 is arranged to be movable horizontally along the straight line, thereby being able to pass through the multiple workstations. For another example, if the multiple workstations are arranged along a circumferential direction, that is, the assembly station 1a and the multiple pre-assembly stations 1b are arranged along a circumferential direction, then the second base 12 is arranged to rotate along an axis extending in the vertical direction. At the same time, considering the form of rotational fit, the second base 12 should be configured as a disc structure.

[0068] The number of workstations matches the types of parts in the injection molded parts, so it can be set to 3, 4 or even more workstations according to the actual structure of the parts. The multiple workstations are divided into an assembly station 1a and multiple waiting assembly stations 1b. The relative position of the assembly station 1a is not limited. For example, when three workstations are set, the middle station is set as the assembly station 1a, and the stations on both sides are set as waiting assembly stations 1b. At this time, the second base body 12 realizes the transfer of parts through reciprocating motion, with a small range of motion and small space requirements. It is also possible to set two waiting assembly stations 1a adjacent to each other, with the assembly station 1a located to the side. In this case, the second base body 12 can complete the transfer of parts through unidirectional motion.

[0069] Specifically, the multiple mold assemblies 2 include multiple first mold assemblies located at assembly station 1a. These multiple first mold assemblies are used to mold multiple identical parts. The arrangement of these multiple first mold assemblies intersects the arrangement of the multiple assembly stations 1b. Accordingly, the multiple first mold assemblies can be arranged in a front-to-back direction or in a radial direction. This arrangement ensures that the number of identical parts processed at each station is sufficient, while also ensuring that the movement of the second base 12 only needs to be adjusted based on the station arrangement, regardless of the arrangement of the mold assemblies 2.

[0070] Furthermore, please refer to Figure 2 The number of mold assemblies 2 at various workstations varies. For example, a louver assembly comprises three components: connecting rods, louvers, and an outer frame, requiring three corresponding workstations. There are two connecting rods, six louvers, and one outer frame. Therefore, six mold assemblies 2 are required at assembly station 1a, one mold assembly 2 at one pre-assembly station 1b, and two mold assemblies 2 at another pre-assembly station 1b. This ensures the mold assembly of multiple components without affecting the movement of the second base 12.

[0071] In some embodiments, please refer to Figure 5 and Figure 7The machine 1 also includes a fixed base 13, which is located below the second base body 12. A first ejection channel 131 is provided on the base 13 and is penetrated in the up and down directions. The first ejection channel 131 is located at the assembly station 1a. A plurality of second ejection channels 121 are provided on the second base body 12. The plurality of second ejection channels 121 penetrate the second base body 12 in the up and down directions. The plurality of second ejection channels 121 are respectively located at a plurality of to-be-assembled stations 1b. Each second ejection channel 121 is communicated with the corresponding cavity of the lower die base 22; a second pushing portion 32 is provided below the base 13. When the second base body 12 moves so that one of the second ejection channels 121 is communicated with the first ejection channel 131, the second pushing portion 32 can lift the part in the cavity of the corresponding lower die base 22 upward until it is assembled with the part in the cavity of the upper die base 21 at the assembly station 1a. At this point, the second ejection portion 32 moves upward to lift the corresponding part on the lower mold base 22 until it engages with the corresponding part in the upper mold base 21, completing the assembly process. Initially, the first ejection channel 131 and the multiple second ejection channels 121 are staggered horizontally. At this point, even if the operator accidentally touches the second ejection portion 32 to activate it, it will only contact the lower end of the second base 12 and be blocked from contacting the part, playing a certain error-proofing role and preventing damage to the mold due to incorrect operation. When the second base 12 moves and changes position, one of the second ejection channels 121 will be driven by the second base 12 to a position directly opposite the first ejection channel 131, thereby connecting the two and allowing the second ejection portion 32 to function. Since the second ejection portion 32 is an upper push structure, the two parts will remain in the upper mold base 21 after assembly.

[0072] The ejection channel refers to a structure that runs through the corresponding template. It can be a columnar structure or a combination of multiple vias. The structures of the first ejection channel 131 and the second ejection channel 121 should be consistent, or the horizontal projection of the second ejection channel 121 should fall within the first ejection channel 131.

[0073] It should be noted that, depending on the number and size of parts in the corresponding assembly station 1a, multiple second pushing parts 32 can be set for adaptation, or a second pushing part 32 can be provided with multiple push rods, so that a driving component can drive the multiple push rods of the second pushing part 32 to move simultaneously, thereby realizing the function of lifting the corresponding parts.

[0074] In this embodiment, two first ejection channels 131 are provided, which are spaced apart in the horizontal direction. Each first ejection channel 131 includes three through holes distributed in a triangular pattern. The two first ejection channels 131 are symmetrically arranged. The second ejection channel 121 matches the first ejection channel 131. The shape of the second ejection portion 32 matches the ejection channel arrangement, that is, there are three corresponding ejector rods.

[0075] It should be understood that the second pusher 32 is activated only after the upper and lower mold bases 21 and 22 are relatively closed. This is because, in the open mold state, the distance between the upper and lower mold bases 21 and 22 is too large, making it difficult for the second pusher 32 to push the parts and prevent them from falling. After closing the mold, the distance between the two parts facing each other in the vertical direction is small, and the mold itself can also provide a certain auxiliary guiding function, making it easier to achieve in-mold assembly.

[0076] In some embodiments, please refer to Figure 6 The first base 11 is provided with a third ejection channel, which is located in the assembly station 1a and communicates with the corresponding cavity of the upper die base 21. The ejection assembly 3 also includes a first ejection portion 31, which is located above the first base 11. When the upper die base 21 and the lower die base 22 in the assembly station 1a are clamped, the first ejection portion 31 can push the parts in the upper die base 21 downward until they are assembled with the corresponding parts in the lower die base 22. At this time, the first ejection portion 31 moves downward to eject the corresponding parts of the upper die base 21 until they are engaged with the corresponding parts in the lower die base 22, thereby completing the assembly process. Since the first ejection portion 31 is a bottom-up structure, the two parts will remain in the lower die base 22 after assembly.

[0077] The rest position of the parts after mold opening can be controlled according to the structure of the mold, and the moving direction of the first pushing portion 31 can be coordinated and designed to achieve in-mold assembly.

[0078] In the embodiment of the present invention, a first pushing portion 31 and a second pushing portion 32 are provided simultaneously. The second pushing portion 32 is located below the base 13 and, by pushing upward, pushes the lower component until it is assembled with the upper component. The first pushing portion 31 is located above the first base 11 and, by pushing downward, pushes the two assembled components together until they are assembled with the lower component. That is, the first pushing portion 31 and the second pushing portion 32 are disposed opposite each other in the vertical direction. The structures of the first pushing portion 31 and the second pushing portion 32 may be the same or different. The components they push are different and the timing of their action is also different.

[0079] During mold design, please refer to Figure 1 、 Figure 3 and Figure 4The upper mold and the lower mold can fit tightly together to ensure the closure of the mold cavity. After the second base body 12 moves, the positions of the multiple lower mold bases 22 change with the movement of the second base body 12, and are thus staggered with the original corresponding upper mold base 21. That is, after the first base body 11 moves, the upper mold base 21 and the lower mold base 22 relative to each other in the vertical direction are not originally matched. At this time, interference problems may occur in controlling the mold closing. In view of this, the second base body 12 has a first position and a second position during the activity. In the first position, the upper mold base 21 and the lower mold base 22 in each mold assembly 2 correspond to each other. In the second position, each upper mold base 21 corresponds to the lower mold base 22 in the adjacent mold assembly 2; the multiple lower mold bases 22 include a first lower mold base 22a, and the first lower mold base 22a is provided with a first limiting protrusion 23; in the first position, the first lower mold base 22a is in the assembly station 1a, and the first limiting protrusion 23 can cooperate with the upper mold base 21 in the assembly station 1a, so that the first lower mold base 22a is tightly fitted with the corresponding upper mold base 21; in the second position, the first lower mold base 22a is in one of the to-be-assembled stations 1b, and the first limiting protrusion 23 can cooperate with the corresponding upper mold base 21, so that the first lower mold base 22a and the corresponding upper mold base 21 form a padding gap. When the first limiting protrusion 23 is in the assembly station 1a, it can cooperate with the matching upper mold base 21 to achieve tight mold closing. The upper mold base 21 that matches the first limiting protrusion 23 may be provided with a limiting hole or the same limiting protrusion, and the present invention does not impose any restrictions on this. When the first limiting protrusion 23 is in the assembly station 1b, the upper mold base 21 above the first limiting protrusion 23 is not an original matching one. Therefore, there is no structure on the upper mold base 21 that cooperates with the first limiting protrusion 23. When closing the mold, the lower end of the upper mold base 21 will not be able to continue to press together due to the impact with the first limiting protrusion 23, so that the mold cannot be completely closed, forming a padding gap. The padding gap allows a distance to be created between the mismatched upper mold base 21 and the lower mold base 22, thereby avoiding interference between the parts and the cavity structure and protecting the parts and the mold.

[0080] It should be noted that since the parts processed in at least some of the workstations are different, the structure of the mold assembly 2 is also different. Therefore, when the first limiting protrusion 23 is at different assembly stations 1b, the pad gap formed with the corresponding upper mold base 21 may also be different.

[0081] When the second base 12 is in the first position, the first limiting protrusion 23 is hidden in the corresponding mold groove. At this time, it may not play a matching function, or it may have a guiding and positioning function. When the second base 12 is in the second position, the first limiting protrusion 23 is exposed to the outside and plays a mold adjustment function, which is used to adjust the mold distance between the upper mold base 21 and the lower mold base 22. According to actual conditions, the height of the first limiting protrusion 23 is adjusted to ensure a suitable mold distance to avoid interference in mold closing after the lower mold base 22 is repositioned.

[0082] It should be noted that a plurality of first limiting protrusions 23 may be provided and evenly arranged in the circumferential direction of the corresponding lower mold base 22 to avoid force deviation during mold closing.

[0083] Furthermore, first mating portions (not shown) are provided on the multiple upper mold bases 21 at the multiple assembly stations 1b, corresponding to the first position-limiting protrusions 23. When in the second position, the first position-limiting protrusions 23 can mate with a corresponding first mating portion. The first mating portion has two operating states: one in which it mates with the original lower mold base 22, performing no mating function or merely serving as a guide and positioning function; and the other in which it mates with the first position-limiting protrusion 23 to jointly define the padding gap. By providing first mating portions of different sizes at different assembly stations 1b, the padding gap can be adjusted when the first position-limiting protrusion 23 is in different positions, thereby making the mold closing distance adjustable.

[0084] It should be noted that the first matching part can be set as a groove, in which case the top end of the first limiting protrusion 23 can be inserted into the groove, and the height of the raised gap is the height of the first limiting protrusion 23; the first matching part can also be set as a bump, in which case the first limiting protrusion 23 is offset against the bump, and the height of the raised gap is the sum of the heights of the bump and the first limiting protrusion 23.

[0085] The structures of the multiple first matching parts at the multiple assembly stations 1b can be the same or different, and can be matched according to the structure of the mold assembly 2 and the design requirements of the padding gap. In addition, among the multiple first matching parts, at least some of the sizes in the vertical direction are different. For example, in two assembly stations 1b, the first matching part of one of the assembly stations 1b is set as a protrusion, and the other is set as a groove. The protrusion is convex outward and the groove is concave inward, and the sizes of the two naturally differ. For example, in two assembly stations 1b, both first matching parts are set as protrusions, and the height of one protrusion is greater than the height of the other protrusion. Both of the above embodiments can enable the first limiting protrusion 23 to achieve different mold closing height control at different assembly stations 1b.

[0086] It should be noted that in order to achieve synchronous control of multiple module components, the first base body 11 and the second base body 12 can be relatively movable to drive multiple mold components 2 to close the mold. In this way, by controlling the lifting and lowering of the first base body 11 and / or the second base body 12, the synchronous closing and opening of multiple module components can be achieved, which facilitates the process control of in-mold assembly.

[0087] It should be understood that in order to ensure that multiple mold assemblies 2 simultaneously reach the mold closing state under a fixed driving stroke of the first base body 11 and / or the second base body 12, the first base body 11 and / or the second base body 12 can be partially stepped to adapt to the mold height of different parts. In other words, the first base body 11 and / or the second base body 12 can be configured with varying thickness.

[0088] In this embodiment, when in the first position, the second base body 12 is partially recessed corresponding to one of the areas to be assembled to form a step for the placement of the relevant lower mold base 22 of the frame body. Correspondingly, the first base body 11 is partially protruded corresponding to the area to be assembled to form a step to achieve adaptation of the mold height.

[0089] Based on the above embodiments, in order to ensure the accuracy of the mold when closing the mold, a column is usually set for guidance. Considering that the position of the second base body 12 can be adjusted, if a column is set on it, it will also change with the movement of the second base body 12. In this embodiment, the injection molded part in-mold assembly equipment 100 includes a plurality of guide columns 4 and a plurality of guide holes that cooperate with each other, one of the guide columns 4 and the guide holes is set on the first base body 11, and the other is set on the second base body 12; the second base body 12 has a first position and a second position during the activity. In the first position, the upper mold base 21 and the lower mold base 22 in each mold assembly 2 correspond to each other, and the multiple guide columns 4 and the multiple guide holes correspond one to one. In the second position, each upper mold base 21 corresponds to the lower mold base 22 in the adjacent mold assembly 2, and at least n guide columns 4 cooperate with the corresponding guide holes, n≥4. The guide holes and guide posts 4 correspond one to one. By reasonably setting the positions and numbers of the multiple guide posts 4, no matter what position the second base 12 is in, at least four guide posts 4 can be used for positioning when the mold is closed, thereby ensuring the mold closing accuracy.

[0090] It should be noted that the two guide posts 4 located in the center need to be arranged to avoid air gaps between the guide sleeve and the mold in the injection molding position to prevent the mold from being over-positioned.

[0091] It should be understood that when the second base 12 cooperates with the base 13, depending on the arrangement of multiple workstations, in some embodiments, the base 13 is provided with grooves, which are provided on two opposite sides in the left and right directions. The second base 12 is slidably mounted within the grooves via linear guides and a linear drive structure, so that it can be accommodated within the grooves in the first position and partially protrude from the grooves in the second position. In other embodiments, the upper end surface of the base 13 can be provided with a groove with an annular cross-section, and the second base 12 can be configured as a disc, which is driven by a motor to enable the second base 12 to be rotatably mounted within the grooves.

[0092] The aforementioned in-mold assembly equipment 100 for injection molded parts also includes a control device, which can be an industrial computer. Machine 1 is the code template of the injection molding machine. Specifically, the control device can include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in read-only memory (ROM) or programs loaded from a storage device into random access memory (RAM). The RAM also stores various programs and data required for the operation of the control device. The processing unit, ROM, and RAM are interconnected via a bus. An input / output (I / O) interface is also connected to the bus. Typically, the following systems can be connected to the I / O interface: input devices such as a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, and gyroscope; output devices such as a liquid crystal display (LCD), speaker, and vibrator; storage devices such as magnetic tape and hard disk; and communication devices. The communication device can allow the control device to communicate with other devices wirelessly or wired to exchange data. Although the drawings show a control device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have instead.

[0093] Based on this, the embodiment of the present application provides a control method for an injection molded part in-mold assembly device. Figure 8 This is a flow chart of the first embodiment of the control method for in-mold assembly equipment for injection molded parts of this application. The relevant steps are described using a louver assembly as an example. Specifically, the louver assembly includes two connecting rods, six louvers, and one outer frame. Based on the characteristics of the parts, the specific assembly sequence is to assemble the connecting rods and louvers first, and then assemble them together with the outer frame. Accordingly, three workstations are set up, and the three workstations are arranged in sequence from left to right.

[0094] Please refer to Figures 8 and 9 In this embodiment, the control method of the injection molded part in-mold assembly equipment specifically includes the following steps:

[0095] Step S10, after the multiple mold assemblies 2 are processed to obtain multiple parts, the upper mold base 21 and the lower mold base 22 of the multiple mold assemblies 2 are controlled to separate so that the upper mold base 21 located at the assembly station 1a holds the parts, and the lower mold base 22 located at the to-be-assembled station 1b holds the parts;

[0096] It should be understood that in the initial state, the first base body 11 and the second base body 12 are facing each other in the up and down directions. At this time, the upper mold base 21 and the lower mold base 22 of each module assembly are matched, and the relative movement of the first base body 11 and the second base body 12 is controlled to make multiple mold assemblies 2 close the mold, thereby obtaining 2 connecting rods, 6 louvers and 1 outer frame through thermal curing, among which the louvers are located in the assembly station 1a, in the middle, and the connecting rods and the outer frame are both located in the assembly station 1b, on the left and right sides of the assembly station 1a respectively.

[0097] Specifically, after the first mold opening, multiple upper mold bases 21 and multiple lower mold bases 22 are separated. Based on the ejector plate structure of the mold, the three parts are ejected at the same time. Finally, two connecting rods are on the lower mold base 22, six louvers are on the upper mold base 21, and one outer frame is on the lower mold base 22.

[0098] Step S20 , controlling the second base 12 to move to transfer one of the lower mold bases 22 holding the part to the assembly station 1 a ;

[0099] It should be noted that, among the multiple lower mold bases 22, there are multiple first lower mold bases 22a, multiple second lower mold bases 22b and third lower mold bases 22c. The multiple first lower mold bases 22a are initially located at the assembly station 1b for processing the louvers, the multiple second lower mold bases 22b are initially located at one of the assembly stations 1b for processing the connecting rods, and the third lower mold base 22c is initially located at another assembly station 1b for processing the outer frame.

[0100] After the first mold opening, the second base body 12 moves, driving multiple second lower mold bases 22b to transfer to the assembly station 1a. At this time, the two connecting rods and the six louvers correspond to each other in the upper and lower positions, and ensure that the installation positions of the connecting rods and the louvers are aligned.

[0101] Since the assembly between parts has a specific assembly position, it is necessary to preset the moving distance of the second base body 12. For example, the second base body 12 is set to stop after moving 220 mm to the right after the first mold opening. At this time, the connecting rod and the louver can achieve the correspondence in the upper and lower directions and the alignment of the installation positions. At this time, the third lower mold base 22c is exposed on the outside of the machine 1.

[0102] Step S30, after controlling the multiple mold assemblies 2 to close the mold, controlling the ejection assembly 3 to work to assemble the parts at the assembly station 1a, and placing the assembled parts on the upper mold base 21;

[0103] It should be noted that the first ejection channel 131 and the second ejection channel 121 are transformed from an initial misaligned relationship to a partially conductive relationship. Since the first limiting protrusion 23 is transferred from the assembly station 1a to the assembly station 1b on the right, after the second mold closing, the first limiting protrusion 23 is against the corresponding upper mold base 21, so the louver and the connecting rod do not interfere with each other, but are close to each other. The distance between the louver and the connecting rod is reduced, but not fitted. At this time, the second pushing part 32 is controlled to push up, and the two connecting rods are simultaneously lifted up to engage with the six louvers, thereby completing the assembly. Since the assembly action is from bottom to top, based on the connection between the louver and the corresponding upper mold base 21, the two combined parts are still on the upper mold base 21.

[0104] Step S40 , controlling the second base 12 to move until the last lower die base 22 holding the part is transferred to the assembly station 1 a ;

[0105] It should be noted that the mold assembly 2 and the second base body 12 are moved repeatedly, so that the multiple lower mold bases 22 enter the assembly station 1a in sequence. After each lower mold base 22 is in the assembly station 1a, the mold is closed and assembled, thereby realizing the sequential assembly process of multiple parts.

[0106] Specifically, after the second mold opening, the connecting rod and louvers are located in the upper mold base 21. The second base 12 is then controlled to move in the opposite direction, driving the outer frame to the assembly station 1a. Since this injection molded part consists of three parts, the outer frame is the last part in this assembly process, and its corresponding third lower mold base 22c is the last lower mold base 22 to hold the part.

[0107] Step S50: After the multiple parts are assembled in the mold, the ejection assembly 3 is controlled to eject the assembled parts onto the lower mold base 22 at the assembly station.

[0108] It should be noted that when the part is attached to the lower mold after the mold is opened, the part can be separated from the mold by relying on the matching lower mold ejection mechanism. When the part is attached to the upper mold after the mold is opened, it is necessary to cooperate with the unloading plate or spring block mechanism. The part will fall after it is detached, so the operator needs to catch it manually. Therefore, in the current mold processing, when designing the cavity, it is generally ensured that the part can be attached to the lower mold after the mold is opened.

[0109] During the assembly of multiple parts, the parts assembled earlier are assembled from bottom to top, so that the injection molded part can stay on the upper mold base 21 of the assembly station 1a. When assembling the last part, the assembly is done from top to bottom, that is, the multiple parts of the upper mold base 21 are pushed together to be combined with the last assembly part of the lower mold base 22, so that the injection molded part can stay on the lower mold base 22, which is convenient for the subsequent removal of materials.

[0110] Specifically, there are two pushing parts. The second pushing part 32 located at the bottom works during the second mold closing, and the first pushing part 31 located at the top works during the third mold closing. The outer frame remains attached to the lower mold base 22. The combined connecting rod and louver are detached from the upper mold base 21 until they are assembled into one with the outer frame to complete the assembly.

[0111] Step S60: Control the multiple mold assemblies 2 to separate and take out the assembled parts.

[0112] After the third mold opening, the injection molded part is attached to the lower mold base 22, and the second push portion 32 located below can be used to demould the injection molded part from the mold again, so that the injection molded part can be taken out manually or by a robot to complete the processing.

[0113] It should be noted that after the injection molded part is taken out, the corresponding structure needs to be reset to facilitate the next processing.

[0114] Although the second pushing portion 32 located below can be used in step S60 and step S30, the functions of the second pushing portion 32 are different. Step S30 is for in-mold assembly, and step S60 is for demolding. Therefore, the upper and lower movable strokes of the second pushing portion 32 in the two steps can be the same or different. For example, in step S30, the second pushing portion 32 is pushed upward by 45 mm and then resets. In step S60, the upper movable stroke of the second pushing portion 32 can be less than or equal to 45 mm.

[0115] In step S30 and step S50, the first pushing portion 31 and the second pushing portion 32 are respectively used to work to achieve the assembly action. Therefore, the movable strokes of the first pushing portion 31 and the second pushing portion 32 may be different. For example, in step S30, the second pushing portion 32 is pushed upward by 45 mm and then reset. In step S50, the first pushing portion 31 is pushed downward by 15 mm and then reset.

[0116] In the technical solution of the present invention, a conventional single-color injection molding machine and a runner system are used in combination to realize the in-mold assembly of three or more parts. The in-mold assembly is realized by changing the position of multiple lower mold bases 22 in conjunction with the ejection assembly 3, thereby reducing the problems of separate injection molding of each component and then manual assembly and turnover in the existing production method, thereby realizing automated production and assembly with high production efficiency.

[0117] Please refer to Figure 9 Based on the above control method, the steps for processing the shutter assembly are as follows:

[0118] The second base 12 is located in the first position, and the upper die base 21 and the lower die base 22 of the mold assembly 2 of the three parts correspond to each other one by one, and the mold is closed to obtain the connecting rod, louver and outer frame arranged from left to right;

[0119] The second seat 12 moves rightward to the first second position. The connecting rod and the louver are aligned in the vertical direction, and the mold is closed. At this time, under the limiting action of the first limiting protrusion 23, there is a mold closing gap. The second pushing portion 32 located below moves upward to drive the connecting rod to be assembled on the louver, and the corresponding second pushing portion 32 is reset downward.

[0120] The mold is opened, and the shutter connecting rod assembly remains in the upper mold base 21;

[0121] The second seat 12 moves leftward to the second second position until the outer frame and the louver connecting rod assembly are aligned in the vertical direction, and the mold is closed. At this time, under the limiting action of the first limiting protrusion 23, there is also a mold closing gap. The louver connecting rod assembly is driven downward by the first pushing portion 31 located above to be assembled onto the outer frame, and the corresponding first pushing portion 31 is reset upward.

[0122] The mold is opened, and the assembled product is placed in the lower mold base 22;

[0123] After the combined product is removed, the second seat body 12 is reset to the right and returns to the first position.

[0124] The upper mold base 21 serves as a static mold, and the lower mold base 22 serves as a dynamic mold. During the assembly process, the basic parts are left in the static mold. After the mold is opened, the dynamic mold moves to replace the parts to be assembled to the assembly station 1a. After the second mold closing, the ejection action can be used to complete the assembly. This action can be reused to complete the assembly of multiple parts, solving the problem of removing obstacles on the product assembly path before assembling products with existing in-mold assembly technology. It reduces the mold difficulty, enhances the mold strength, and has high product assembly flexibility, laying the foundation for the subsequent assembly of products with more components.

[0125] 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. An in-mold assembly device for injection molded parts, wherein the injection molded parts include at least three parts, characterized in that: The injection molded part in-mold assembly equipment includes: The machine includes a first base body and a second base body arranged relative to each other in the vertical direction, the first base body and the second base body can move relative to each other under the drive of the injection molding equipment, the first base body includes an assembly station, the second base body includes an assembly station corresponding to the first base body and a plurality of to-be-assembled stations, the second base body is movably arranged in the horizontal direction, and the assembly station on the first base body is provided with a third ejection channel, the third ejection channel being connected to the corresponding cavity of the upper mold base; A plurality of mold assemblies for processing a plurality of parts, each of the mold assemblies comprising an upper mold base and a lower mold base disposed relative to each other in the upper and lower directions, the upper mold base and the lower mold base being movable relative to each other, wherein a plurality of the upper mold bases are disposed on the first base body, and at least one of the upper mold bases is located at an assembly station of the first base body, and a plurality of the lower mold bases are disposed at an assembly station of the second base body and at a plurality of stations to be assembled; and The ejection assembly includes a first ejection part, the first ejection part is located above the first base, and when the upper mold base and the lower mold base are in the assembly position, the first ejection part can pass through the third ejection channel to push the part in the upper mold base downward until it is assembled with the part in the corresponding lower mold base. The ejection assembly also includes at least one second ejection part movably mounted to the machine table in the up-down direction, the second ejection part is located at the assembly position of the second base, and after the second base moves to drive the position conversion of the plurality of lower mold bases, the second ejection part moves upward to drive the parts at the assembly position of the second base to be assembled with the parts on the first base; The second seat body has a first position and a second position during the movement process, wherein in the first position, the upper die seat and the lower die seat in each mold assembly are correspondingly matched, and in the second position, each upper die seat is correspondingly matched with the lower die seat in the adjacent mold assembly; The plurality of lower die bases include a first lower die base, and the first lower die base is provided with a first limiting protrusion; When in the first position, the first lower die base is at the assembly station, and the first limiting protrusion can cooperate with the upper die base at the assembly station, so that the first lower die base is tightly fitted with the corresponding upper die base; When in the second position, the first lower die base is located at one of the to-be-assembled stations, and the first limiting protrusion can cooperate with the corresponding upper die base so that a padding gap is formed between the first lower die base and the corresponding upper die base.

2. The in-mold assembly equipment for injection molded parts according to claim 1, wherein: The multiple mold assemblies include multiple first mold assemblies located at the assembly station, and the multiple first mold assemblies are used to form multiple identical parts. The arrangement direction of the multiple first mold assemblies intersects with the arrangement direction of the multiple assembly stations.

3. The in-mold assembly equipment for injection molded parts according to claim 1, wherein: The assembly station and the plurality of stations to be assembled are arranged along a straight line, and the second seat is movably arranged along the straight line; or, The assembly station and the plurality of stations to be assembled are arranged along a circumferential direction, and the second base body is rotatably arranged along an axis extending in an up-down direction.

4. The in-mold assembly equipment for injection molded parts according to claim 1, wherein: The machine further includes a fixed base, the base being located below the second base body, the base being provided with a first ejection channel extending vertically therethrough, the first ejection channel being located at the assembly station; The second base body is provided with a plurality of second ejection channels, the plurality of second ejection channels being provided through the second base body in the vertical direction, the plurality of second ejection channels being respectively located at the plurality of the to-be-assembled stations, and each second ejection channel being communicated with the corresponding cavity of the lower die base; The second pushing portion is arranged below the base. When the second base body moves so that one of the second ejection channels is connected to the first ejection channel, the second pushing portion can push the part in the corresponding cavity of the lower mold base upward to be assembled into one with the part in the cavity of the upper mold base at the assembly station.

5. The in-mold assembly equipment for injection molded parts according to claim 1, wherein: A first matching portion is provided on each of the plurality of upper die seats at the plurality of stations to be assembled; In the second position, the first limiting protrusion can cooperate with a corresponding one of the first matching portions.

6. The in-mold assembly equipment for injection molded parts according to claim 1, wherein: The first base and the second base can be movably arranged relative to each other to drive the plurality of mold assemblies to close the mold.

7. The in-mold assembly equipment for injection molded parts according to claim 6, wherein: The injection molded part in-mold assembly device includes a plurality of guide posts and a plurality of guide holes that cooperate with each other, one of the guide posts and the guide holes is arranged on the first base body, and the other is arranged on the second base body; The second seat body has a first position and a second position during the movement. In the first position, the upper die seat and the lower die seat in each mold assembly correspond to each other, and the multiple guide pillars and the multiple guide holes correspond one to one. In the second position, each upper die seat corresponds to the lower die seat in the adjacent mold assembly, and at least n guide pillars correspond to the corresponding guide holes, n≥4.

8. A control method for an in-mold assembly device for injection molded parts, based on the in-mold assembly device for injection molded parts according to any one of claims 1 to 7, characterized in that: The control method of the injection molded part in-mold assembly equipment comprises the following steps: After the plurality of mold assemblies are processed to obtain a plurality of parts, the upper mold bases and the lower mold bases of the plurality of mold assemblies are controlled to separate so that the upper mold base located at the assembly station holds the parts, and the lower mold base located at the to-be-assembled station holds the parts; Controlling the second seat to move so as to transfer one of the lower mold bases holding a part to the assembly station; After controlling the plurality of mold assemblies to close the mold, controlling the ejection assembly to work so as to combine the parts at the assembly station and place the combined parts at the upper mold base; Controlling the second seat to move until the last lower die seat holding a part is transferred to the assembly station; When the multiple parts are assembled in the mold, the ejection assembly is controlled to eject the assembled parts onto the lower mold base at the assembly station; Control the separation of the plurality of mold assemblies and take out the assembled parts.

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