Multi-material injection molding mold and multi-material injection assembly mold

Abstract

The application discloses a multi-material injection molding die and a multi-material injection assembly die, and relates to the technical field of injection molding devices. The multi-material injection molding die comprises a first front die assembly, a second front die assembly, a rear die assembly, a core-pulling assembly and a transfer mechanism for transferring the rear die assembly between a first station and a second station; the core-pulling assembly comprises a first insert and a second insert which are relatively movable along a first direction perpendicular to a mold opening direction; the first insert and the second insert have a first state of approaching each other along the first direction and a second state of moving away from each other along the first direction; the rear die assembly can be combined with different front die assemblies at different stations, and the state of the first insert and the second insert can be changed to form different injection molding cavities between the rear die assembly and the first front die assembly and the second front die assembly, so that injection molding of an injection assembly part containing multiple components is realized. The technical scheme of the application can improve the production efficiency of multi-material injection parts while reducing the structure requirement of the die.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, and in particular to a multi-material injection molding die and a multi-material injection assembly die. Background Technology

[0002] Currently, dishwasher water line connectors consist of a central sealing ring and a connector body. To complete this assembly, the sealing ring and connector body need to be separately injection molded and assembled into a single unit. Traditional manual assembly is inefficient. To address the problems of traditional molding methods, multi-injection molding technologies have emerged, sequentially injection molding the sealing ring and connector body to save assembly steps. For example, transferring the first-molded connector body to a second injection molding machine (for soft rubber) for sealing ring molding requires skilled personnel and advanced equipment, resulting in low efficiency and high cost. Alternatively, using gear structures or hydraulic cylinders to rotate the core within the mold alters the cavity structure for the second injection, leading to complex mold structures and higher requirements for mold precision and control. Summary of the Invention

[0003] The main objective of this invention is to provide a multi-material injection molding die and a multi-material injection assembly die, aiming to solve the problems of high requirements and low efficiency in existing multi-material injection molding technology.

[0004] To achieve the above objectives, the present invention provides a multi-material injection molding die, comprising:

[0005] First front mold assembly, second front mold assembly, and rear mold assembly;

[0006] A core-pulling assembly is disposed on the rear mold assembly; and

[0007] A transfer mechanism for transferring the rear mold assembly between a first station and a second station;

[0008] The core-pulling assembly includes a first insert and a second insert that are movable relative to each other along a first direction, the first direction being perpendicular to the mold opening direction; the first insert and the second insert have a first state in which they are close to each other along the first direction, and a second state in which they are far apart from each other along the first direction.

[0009] When the first insert and the second insert are in the first state, and the rear mold assembly is in the first station and is molded with the first front mold assembly, the first insert, the second insert, the rear mold assembly, and the first front mold assembly define a first injection cavity for molding the first injection molded part;

[0010] When the first insert and the second insert are in the second state, and the rear mold assembly is in the second station and is closed with the second front mold assembly, the first insert, the second insert, the rear mold assembly, and the second front mold assembly define a second injection cavity for molding an injection assembly. The injection assembly includes a first injection part and an injection component disposed on the first injection part. The position vacated by the first insert and the second insert when switching from the first state to the second state is used to mold the injection component.

[0011] In one embodiment, the injection-molded component includes a first component and a second component. The first insert and the second insert switch to a second state by moving in opposite directions. The position vacated by the movement of the first insert forms a third injection cavity for molding the first component, and the position vacated by the movement of the second insert forms a fourth injection cavity for molding the second component.

[0012] In one embodiment, the first injection molded part is hollow and includes an inner part and an outer part that are connected to each other. The first component is located on the outside of the outer part, and the second component is located on the inside of the inner part.

[0013] In one embodiment, the core-pulling assembly further includes ejector pins disposed between the first insert and the second insert. When the first insert and the second insert are in a first state, one ejector pin is connected to one of the first insert and the second insert and abuts against the other, or one ejector pin is connected to the first insert and the other ejector pin is connected to the second insert, with the two ejector pins abutting against each other. When the mold is closed with the rear mold assembly, the first front mold assembly is provided with a first injection channel communicating with the first injection cavity, and the second front mold assembly is provided with a second injection channel communicating with the third injection cavity or the fourth injection cavity.

[0014] In one embodiment, the opposite ends of the first insert and the second insert are each connected to a fixing block, and the two fixing blocks are slidably connected to the rear mold assembly; the first front mold assembly is provided with a first abutting member disposed opposite to each other, which is used to push the two fixing blocks to move towards each other when the mold is closed, so as to drive the first insert and the second insert to move to a first state; the second front mold assembly is provided with a second abutting member disposed opposite to each other, which is used to push the two fixing blocks to move away from each other when the mold is closed, so as to drive the first insert and the second insert to move to a second state.

[0015] In one embodiment, a first guide slope is provided on the side of the two fixed blocks facing each other, and a second guide slope is provided on the side of the two blocks facing away from each other. In the direction away from the rear mold assembly, the first guide slope and the second guide slope of the same fixed block are inclined towards each other. When the first pusher presses against the second guide slope of the two fixed blocks, the two fixed blocks move towards each other. When the second pusher presses against the first guide slope of the two fixed blocks, the two fixed blocks move away from each other.

[0016] In one embodiment, the rear mold assembly includes a rear template and a slider slidably connected to the rear template. The rear template and the slider are provided with a receiving cavity for mounting the fixing block. The rear template and the slider are provided with a first through hole corresponding to the first pushing member and a second through hole corresponding to the second pushing member. The first through hole and the second through hole communicate with the receiving cavity. The multi-material injection molding die further includes a first driving member that drives the slider to move along a first direction.

[0017] In one embodiment, the multi-material injection molding die further includes a third insert and a second drive member. The third insert is disposed on the rear template and one end is inserted into the side of the second injection cavity away from the slider. The second drive member is disposed on the rear template and is used to drive the third insert to move along a first direction.

[0018] In one embodiment, the multi-material injection molding die further includes a fourth insert connected to the slider, a first insert sleeved on the fourth insert, a second insert sleeved on the third insert, and the third insert and the fourth insert forming a hollow portion of the first injection molded part.

[0019] In one embodiment, the transfer mechanism includes a turntable and a third driving member driving the turntable. The rear mold assembly is disposed on the turntable, and the turntable is used to drive the rear mold assembly to rotate and switch between a first station facing the first front mold assembly and a second station facing the second front mold assembly.

[0020] In one embodiment, the multi-material injection molding die includes two identical rear mold assemblies, which are disposed on the turntable and are symmetrically arranged with respect to the radial axis of the turntable.

[0021] In one embodiment, the multi-material injection molding die further includes a fourth driving member and a fixed plate and a sliding plate disposed opposite to each other. The turntable is rotatably connected to the sliding plate. The first front mold assembly and the second front mold assembly are disposed on the fixed plate. The fourth driving member is driven to connect to the sliding plate and is used to drive the sliding plate to move toward or away from the fixed plate.

[0022] The present invention also proposes a multi-material injection molding assembly mold, including the multi-material injection molding mold as described above, and an assembly mechanism. When the rear mold assembly is in the second station and is closed with the second front mold assembly, the rear mold assembly and the second front mold assembly further define a fifth injection cavity for molding a second injection molded part. The second injection cavity and the fifth injection cavity are spaced apart in a first direction. The assembly mechanism includes a fifth insert and a fifth drive member disposed on the rear mold assembly. One end of the fifth insert is inserted into the side of the fifth injection cavity away from the second injection cavity. The fifth drive member is used to drive the fifth insert to move along the first direction to drive the second injection molded part to be assembled with the injection molded assembly.

[0023] In one embodiment, the second front mold assembly includes a front template and a cavity member movably disposed on the front template along a first direction. The rear mold assembly includes a rear mold base plate, a rear template, and a fixing seat. The rear template is movably disposed on the rear mold base plate along the mold opening direction. The rear template has receiving grooves extending through both end faces in the mold opening direction. The fixing seat is disposed on the rear mold base plate and located within the receiving grooves. The first insert is disposed on the fixing seat, and the second insert is disposed on the rear template. When the second front mold assembly and the rear mold assembly are closed, the cavity member abuts against the inner sidewall of the rear template. The cavity member, the front template, and the rear template define the fifth injection cavity.

[0024] In one embodiment, the second front mold assembly further includes a pressure plate disposed on the side of the front mold facing away from the rear mold. The pressure plate is movable toward or away from the front mold. The cavity component includes a connecting rod and an inclined top. One end of the connecting rod is rotatably connected to the pressure plate, and the other end passes through the front mold and is fixedly connected to the inclined top. The connecting rod is inclined in the direction of the fifth injection cavity toward the second injection cavity.

[0025] In one embodiment, a fixing block is slidably connected to the fixing base and the rear template, and the opposite ends of the first insert and the second insert are both connected to the fixing block; the first front mold assembly is provided with a first abutting member disposed opposite to each other, which is used to push the two fixing blocks to move towards each other when the mold is closed, so as to drive the first insert and the second insert to move to a first state; the front template is provided with a second abutting member disposed opposite to each other, which is used to push the two fixing blocks to move away from each other when the mold is closed, so as to drive the first insert and the second insert to move to a second state.

[0026] In one embodiment, a first guide slope is provided on the side of the two fixed blocks facing each other, and a second guide slope is provided on the side of the two blocks facing away from each other. In the direction away from the rear mold assembly, the first guide slope and the second guide slope of the same fixed block are inclined towards each other. When the first pusher presses against the second guide slope of the two fixed blocks, the two fixed blocks move towards each other. When the second pusher presses against the first guide slope of the two fixed blocks, the two fixed blocks move away from each other.

[0027] In one embodiment, the rear mold assembly further includes a slider slidably connected to the fixed base. The rear mold plate and the slider are provided with a receiving cavity for mounting the fixed block. The rear mold plate and the slider are provided with a first through hole and a second through hole communicating with the receiving cavity at one end facing the front mold plate. When the rear mold assembly and the first front mold assembly are closed, the first pusher is inserted into the first through hole. When the rear mold assembly and the second front mold assembly are closed, the second pusher is inserted into the second through hole. The multi-material injection molding assembly mold further includes a first driving member that drives the slider. The first driving member is used to drive the slider to move along a first direction.

[0028] The technical solution of the present invention provides a transfer mechanism for transferring the rear mold assembly between a first station and a second station, so that when the rear mold assembly is at the first station, it can perform a translational movement relative to the first front mold assembly for opening and closing the mold, and when the rear mold assembly is at the second station, it can perform a translational movement relative to the second front mold assembly for opening and closing the mold. After the rear mold assembly is transferred to the first station and joined with the first front mold assembly to form the first injection cavity, the first injection molding is performed to form the first injection molded part in the first injection cavity. Then, the rear mold assembly and the first front mold assembly are separated and transferred to the second station, where the rear mold assembly and the second front mold assembly are joined to form the second injection cavity. Since the second injection cavity is used to form an injection assembly including the first injection molded part and injection molded components disposed on the first injection molded part, when the first injection molded part is located in the second injection cavity, the remaining space in the second injection cavity is used to form the injection molded component. This space is the position vacated when the first insert and the second insert switch from the first state to the second state. At this time, the second injection molding is performed to form the injection molded component in the remaining space, that is, to form the injection assembly. During the transfer of the rear mold assembly from the first station to the second station, the first injection molded part remains on the rear mold assembly, eliminating the need to remove the first injection molded part and place it into different injection cavities for a second injection. This improves production efficiency and eliminates the need to consider positional accuracy when repositioning the first injection molded part, reducing the precision requirements of the multi-material injection molding mold. Furthermore, the remaining space for the second injection is formed by the relative back-to-back movement of the first insert and the second insert along a first direction. The movement path is simple and direct, facilitating implementation and reducing the structural requirements of the multi-material injection molding mold. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an embodiment of the multi-material injection molding die of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the rear mold assembly being molded with the first front mold assembly and the second front mold assembly in one embodiment of the multi-material injection molding die of the present invention;

[0032] Figure 3 for Figure 2 Sectional view at point A in the middle;

[0033] Figure 4 for Figure 3 A magnified view of a section at point E in the middle;

[0034] Figure 5 for Figure 2 Sectional view at point B;

[0035] Figure 6 for Figure 5 A magnified view of a section at point F in the middle;

[0036] Figure 7 for Figure 2 Sectional view at point C;

[0037] Figure 8 for Figure 2 Sectional view at point D;

[0038] Figure 9 This is a schematic diagram of the rear mold assembly in one embodiment of the multi-material injection molding die of the present invention;

[0039] Figure 10 This is a schematic diagram of the core-pulling assembly in one embodiment of the multi-material injection molding die of the present invention;

[0040] Figure 11 This is a schematic diagram of the structure of the first front mold assembly and the second front mold assembly in one embodiment of the multi-material injection molding die of the present invention;

[0041] Figure 12 This is a schematic diagram illustrating the interaction between an embodiment of the multi-material injection molding assembly mold of the present invention and an injection molding machine;

[0042] Figure 13 This is a schematic diagram of the structure of an embodiment of the multi-material injection molding assembly mold of the present invention;

[0043] Figure 14 This is a schematic diagram of the closing structure of the rear mold assembly and the second front mold assembly in one embodiment of the multi-material injection molding assembly mold of the present invention;

[0044] Figure 15 for Figure 14 Sectional view at point H;

[0045] Figure 16 for Figure 15 A magnified view of a section at point J;

[0046] Figure 17 for Figure 15 A magnified view of a section at point K;

[0047] Figure 18 This is a schematic diagram of the mold assembly structure of the rear mold assembly and the first front mold assembly in one embodiment of the multi-material injection molding assembly mold of the present invention.

[0048] Figure 19 for Figure 18 Sectional view at point L;

[0049] Figure 20 for Figure 19 A magnified view of a section at point M;

[0050] Figure 21 This is a schematic diagram of the rear mold assembly in one embodiment of the multi-material injection molding assembly mold of the present invention;

[0051] Figure 22 This is a schematic diagram of the cavity component in one embodiment of the multi-material injection molding assembly mold of the present invention;

[0052] Figure 23 This is a schematic diagram of the installation structure of the rear mold assembly on the turntable in one embodiment of the multi-material injection molding assembly mold of the present invention;

[0053] Figure 24 This is a schematic diagram of the structure of the injection-molded assembly and the second injection-molded part in one embodiment of the multi-material injection molding assembly mold of the present invention;

[0054] Figure 25 for Figure 24 Cross-sectional view of the middle injection molding assembly and the second injection molding part.

[0055] Explanation of icon numbers:

[0056]

[0057] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0059] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0060] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0061] Currently, dishwasher water line connectors consist of a central sealing ring and a connector body. To complete this assembly, the sealing ring and connector body need to be separately injection molded and assembled into a single unit. Traditional manual assembly is inefficient. To address the problems of traditional molding methods, multi-injection molding technologies have emerged, sequentially injection molding the sealing ring and connector body to save assembly steps. For example, transferring the first-molded connector body to a second injection molding machine (for soft rubber) for sealing ring molding requires skilled personnel and advanced equipment, resulting in low efficiency and high cost. Alternatively, using gear structures or hydraulic cylinders to rotate the core within the mold alters the cavity structure for the second injection, leading to complex mold structures and higher requirements for mold precision and control.

[0062] To address the above problems, this invention proposes a multi-material injection molding die.

[0063] Please see Figures 1 to 6In this embodiment, the multi-material injection molding die 10 includes a first front mold assembly 100, a second front mold assembly 200, a rear mold assembly 300, a core-pulling assembly 600, and a transfer mechanism; wherein, the core-pulling assembly 600 is disposed on the rear mold assembly 300, and the transfer mechanism is used to transfer the rear mold assembly 300 between a first station and a second station; the core-pulling assembly 600 includes a first insert 610 and a second insert 620 that are movable relative to each other along a first direction, the first direction being perpendicular to the mold opening direction; the first insert 610 and the second insert 620 have a first state of being close to each other along the first direction, and a second state of being far apart from each other along the first direction; the first insert 610 and the second insert 620 are in the first state, the rear mold assembly 300 is in the first station and is in contact with the first front mold assembly 100, a second front mold assembly 200, a rear mold assembly 300, and the core-pulling assembly 600; When the front mold assembly 100 is closed, the first insert 610, the second insert 620, the rear mold assembly 300, and the first front mold assembly 100 define a first injection cavity 400 for molding the first injection molded part 50. When the first insert 610 and the second insert 620 are in a second state, and the rear mold assembly 300 is in a second position and is closed with the second front mold assembly 200, the first insert 610, the second insert 620, the rear mold assembly 300, and the second front mold assembly 100 define a second injection cavity for molding the injection molded assembly 50. The injection molded assembly 50 includes a first injection molded part 51 and an injection molded component disposed on the first injection molded part. The position vacated by the first insert 610 and the second insert 620 when switching from the first state to the second state is used to mold the injection molded component.

[0064] By providing a transfer mechanism for transferring the rear mold assembly 300 between the first and second workstations, the rear mold assembly 300 can perform a translational movement relative to the first front mold assembly 100 for mold opening and closing when at the first workstation, and the rear mold assembly 300 can perform a translational movement relative to the second front mold assembly 200 for mold opening and closing when at the second workstation. Furthermore, by providing a core-pulling assembly 600 on the rear mold assembly 300, the core-pulling assembly 600 includes a first insert 610 and a second insert 620 that can move relative to each other along a first direction perpendicular to the mold opening direction. The first insert 610 and the second insert 620 are provided in a first state where they are close to each other along the first direction, and a second state where they are far apart from each other along the first direction. This allows the first insert 610 and the second insert 620 to be in the first state, the rear mold assembly 300 to be in the first workstation, and to be molded with the first front mold assembly 100. When the first insert 610, the second insert 620, the rear mold assembly 300, and the first front mold assembly 100 define a first injection cavity 400 for molding the first injection molded part 50; and when the first insert 610 and the second insert 620 are in a second state, the rear mold assembly 300 is in a second position and is closed with the second front mold assembly 200, the first insert 610, the second insert 620, the rear mold assembly 300, and the second front mold assembly 200 define a second injection cavity for molding the injection molded assembly 50. After the rear mold assembly 300 is transferred to the first station and closed with the first front mold assembly 100 to form the first injection cavity 400, the first injection molding is performed to form the first injection molded part 50 in the first injection cavity 400. Then, the rear mold assembly 300 and the first front mold assembly 100 are separated and transferred to the second station, where the rear mold assembly 300 and the second front mold assembly 200 are closed to form the second injection cavity. Since the second injection cavity is used to form an injection assembly 50 including the first injection molded part 51 and the injection molded component disposed on the first injection molded part 51, when the first injection molded part 51 is located in the second injection cavity, the remaining space in the second injection cavity is used to form the injection molded component. This space is the position vacated when the first insert 610 and the second insert 620 switch from the first state to the second state. At this time, the second injection molding is performed to form the injection molded component in the remaining space, that is, to form the injection assembly 50.

[0065] It is understandable that during the transfer of the rear mold assembly 300 from the first station to the second station, the first injection molded part 50 remains on the rear mold assembly 300, without needing to remove the first injection molded part 50 and place it into different injection cavities for a second injection molding. This improves production efficiency and eliminates the need to consider the positional accuracy when repositioning the first injection molded part 50, reducing the precision requirements on the multi-material injection molding mold 10. Furthermore, the remaining space for the second injection molding is formed by the relative back-to-back movement of the first insert 610 and the second insert 620 along the first direction. The movement path is simple and direct, facilitating implementation and reducing the structural requirements of the multi-material injection molding mold 10.

[0066] As can be seen from the above, the rear mold assembly 300 needs to be molded with the first front mold assembly 100 and the second front mold assembly 200 respectively to form the first injection cavity 400 and the second injection cavity. Therefore, the rear mold assembly 300 needs to be transferred between the first station and the second station so that the rear mold assembly 300 can perform mold opening and closing movements relative to the first front mold assembly 100 or the second front mold assembly 200. Typically, the rear mold assembly 300 achieves mold opening and closing with the first front mold assembly 100 or the second front mold assembly 200 through translation. That is, when the rear mold assembly 300 is in the first station, the rear mold assembly is facing the first front mold assembly 100, and the rear mold assembly 300 achieves mold closing or opening with the first front mold assembly 100 by translating closer to or away from the first front mold assembly 100. Similarly, when the rear mold assembly 300 is in the second station, the rear mold assembly 300 is facing the second front mold assembly 200, and the rear mold assembly 300 achieves mold closing or opening with the second front mold assembly 200 by translating closer to or away from the second front mold assembly 200.

[0067] The first insert 610 and the second insert 620 are movable relative to each other along a first direction, so that the first insert 610 and the second insert 620 can switch between a first state of being close to each other and a second state of being far apart from each other. When the first insert 610 and the second insert 620 are in the first state of being close to each other, the first insert 610 and the second insert 620 can abut against each other or be spaced apart; when the first insert 610 and the second insert 620 switch to the second state of being far apart from each other, obviously, compared with the first state, the distance between the first insert 610 and the second insert 620 in the second state is greater, and the space between them is also larger. The first insert 610 and the second insert 620 can switch to a second state of mutual separation by moving the first insert 610 away from the second insert 620. In this state, the second insert 620 remains stationary, and the molding space of the injection molded component is formed by the position vacated by the movement of the first insert 610. Alternatively, the first insert 610 and the second insert 620 can also switch to a second state of mutual separation by moving the second insert 620 away from the first insert 610. In this state, the first insert 610 remains stationary, and the molding space of the injection molded component is formed by the position vacated by the movement of the second insert 620.

[0068] Unlike the above embodiments, in another embodiment, the injection molding component includes a first component 54 and a second component 55. The first insert 610 and the second insert 620 switch to a second state by moving in opposite directions. The position vacated by the movement of the first insert 610 forms a third injection cavity 410 for molding the first component 54, and the position vacated by the movement of the second insert 620 forms a fourth injection cavity 420 for molding the second component 55. At this time, the first insert 610 moves away from the second insert 620, and the second insert 620 moves away from the first insert 610. When the first insert 610 and the second insert 620 are spaced apart in the first state, the third injection cavity 410 and the fourth injection cavity 420 are spaced apart. The injection molding component includes the first component 54 and the second component 55, which can realize the injection molding of an injection assembly 50 including the first injection molded component 51 and multiple components disposed on the first injection molded component 51. Similarly, when only the first insert 610 or the second insert 620 moves, the injection molding component comprises a single component, thereby enabling the injection molding of an injection assembly 50 including the first injection molding component 51 and the single component disposed on the first injection molding component 51. Correspondingly, the number of inserts can be increased to increase the number of components included in the injection assembly 50.

[0069] Since the first injection cavity 400 and the second injection cavity are injected sequentially, different independent injection channels can be set up to connect with the first injection cavity 400 and the second injection cavity respectively. This allows the first injection molded part 50 formed in the first injection cavity 400 and the injection molded part formed in the remaining space after the first injection molded part 50 is placed in the second injection cavity to have different materials, thus achieving multi-material injection molding of the final injection molded assembly 50. The multi-material injection molding mold 10 can select different setting methods and state switching methods for the first insert 610 and the second insert 620 according to the number of parts contained in the injection molded assembly 50. At the same time, when the remaining space after the first injection molded part 50 is placed in the second injection cavity forms the third injection cavity 410 and the fourth injection cavity 420, different injection channels can also be set up to connect the third injection cavity 410 and the fourth injection cavity 420 respectively for injection molding, thus achieving different materials for different parts in the injection molded component.

[0070] The multi-material injection molding mold 10 can accommodate injection assemblies 50 containing different numbers of parts, and can also accommodate parts positioned at different locations on the first injection part 51. In one embodiment, the first injection part 51 is hollow and includes an inner portion 53 and an outer portion 52 connected to each other. The first part 54 is located outside the outer portion 52, and the second part 55 is located inside the inner portion 53. The shapes of the first part 54 and the second part 55 can be the same or different. Alternatively, both the first part 54 and the second part 55 can be located outside the first injection part 51, or both inside the first injection part 51. Therefore, the multi-material injection molding mold 10 can meet the multi-material injection molding needs of parts made of different materials. Furthermore, the position and shape of the third injection cavity 410 and / or the fourth injection cavity 420 can be adjusted according to the location of parts made of different materials to obtain injection assemblies 50 with different structures, thus improving the applicability and flexibility of the multi-material injection molding mold 10.

[0071] Please see Figures 7 to 10In one embodiment, the core-pulling assembly 600 further includes an ejector pin 80 disposed between the first insert 610 and the second insert 620. When the first insert 610 and the second insert 620 are in a first state, one ejector pin 80 is connected to one of the first insert 610 and the second insert 620 and abuts against the other, or one ejector pin 80 is connected to the first insert 610 and the other ejector pin 80 is connected to the second insert 620, and the two ejector pins 80 abut against each other. When the mold is closed with the rear mold assembly 300, the first front mold assembly 100 is provided with a first injection channel 110 communicating with the first injection cavity 400, and the second front mold assembly 200 is provided with a second injection channel 210 communicating with the third injection cavity 410 or the fourth injection cavity 420.

[0072] The ejector pin 80 is disposed between the first insert 610 and the second insert 620. When the first insert 610 and the second insert 620 are in a first state of being close to each other, if one end of the ejector pin 80 is connected to the first insert 610 and the other end abuts against the second insert 620, then after the first insert 610 and the second insert 620 move to a second state of being far apart from each other, the ejector pin 80 moves together with the first insert 610 in a direction away from the second insert 620, the ejector pin 80 separates from the second insert 620, and the position vacated after the ejector pin 80 moves can form a connecting channel connecting the third injection cavity 410 and the fourth injection cavity 420. Obviously, the second front mold assembly 200 only needs to be provided with a second injection channel 210 connecting the third injection cavity 410 or the fourth injection cavity 420, so that the material filling in the third injection cavity 410 and the fourth injection cavity 420 can be satisfied through the connecting channel, thereby realizing the molding of the first component 54 and the second component 55. Similarly, when the first insert 610 and the second insert 620 are in a first state of being close to each other, if one end of the ejector pin 80 is connected to the second insert 620 and the other end abuts against the first insert 610, the same technical effect can be achieved.

[0073] Furthermore, there can be multiple ejector pins 80. All of the multiple ejector pins 80 can be connected to the first insert 610 or the second insert 620, or they can be partially connected to the first insert 610 and partially connected to the second insert 620. When the first insert 610 and the second insert 620 are in a first state of being close to each other, the ejector pins 80 connected to the first insert 610 abut against the second insert 620, and the ejector pins 80 connected to the second insert 620 abut against the first insert 610. After the first insert 610 and the second insert 620 move to a second state of being far apart from each other, multiple connecting channels are formed between the third injection cavity 410 and the fourth injection cavity 420. Forming multiple connecting channels can increase the rate at which injection molding material flows from the third injection cavity 410 into the fourth injection cavity 420, or from the fourth injection cavity 420 into the third injection cavity 410; and when one connecting channel is blocked, other connecting channels can ensure that the interior of the third injection cavity 410 and the fourth injection cavity 420 are eventually completely filled, thereby improving the yield of injection molding.

[0074] Preferably, considering that when the first insert 610 and the second insert 620 move from the first state to the second state, in the first direction, the distance that the first insert 610 or the second insert 620 moves needs to be greater than the length of the ejector pin 80 so that the ejector pin 80 can be retracted into the third injection cavity 410 or the fourth injection cavity 420, thereby realizing the communication between the third injection cavity 410 and the fourth injection cavity 420. The third injection cavity 410 and the fourth injection cavity 420 are designed according to the actual shape of the injection molded part to be formed. Therefore, to avoid the length of the ejector pin 80 affecting the normal formation of the third injection cavity 410 or the fourth injection cavity 420, in one embodiment, the number of ejector pins 80 is set to a minimum of two, one ejector pin 80 is connected to the first insert 610, and the other ejector pin 80 is connected to the second insert 620; the ejector pin 80 connected to the first insert 610 is the first ejector pin 80, and the ejector pin 80 connected to the second insert 620 is the second ejector pin 80, the first insert 610 and the second insert 620... When 620 is in the first state, the first ejector pin 80 abuts against the second ejector pin 80. After the first insert 610 and the second insert 620 move to the second state, the first ejector pin 80 moves into the third injection cavity 410, and the second ejector pin 80 moves into the fourth injection cavity 420. The opposite ends of the first ejector pin 80 and the second ejector pin 80 separate from the first injection molded part 50, so that the connecting channel connects the third injection cavity 410 and the fourth injection cavity 420. In this way, the lengths of the first ejector pin 80 and the second ejector pin 80 can be adjusted accordingly based on the lengths of the third injection cavity 410 and the fourth injection cavity 420 in the first direction, avoiding excessive movement distances required for the first insert 610 or the second insert 620.

[0075] Similarly, multiple first ejector pins 80 can be connected to the first insert 610. The multiple first ejector pins 80 can be connected at intervals to one end of the first insert 610 facing the second insert 620. A corresponding number of second ejector pins 80 are connected to the second insert 620. The first ejector pins 80 and the second ejector pins 80 are arranged in a cooperative manner to form multiple connecting channels, thereby increasing the rate at which the injection molding material flows from the third injection cavity 410 into the fourth injection cavity 420, or from the fourth injection cavity 420 into the third injection cavity 410. Furthermore, when a connecting channel is blocked, other connecting channels can be used to ensure that the interior of the third injection cavity 410 and the fourth injection cavity 420 is eventually completely filled, thereby improving the yield of injection molding.

[0076] Please see Figure 10In one embodiment, the opposite ends of the first insert 610 and the second insert 620 are each connected to a fixing block 630, and the two fixing blocks 630 are slidably connected to the rear mold assembly 300; the first front mold assembly 100 is provided with two opposing first abutting members 120, which are used to push the two fixing blocks 630 to move towards each other when the mold is closed, so as to drive the first insert 610 and the second insert 620 to move to a first state; the second front mold assembly 200 is provided with two opposing second abutting members 220, which are used to push the two fixing blocks 630 to move away from each other when the mold is closed, so as to drive the first insert 610 and the second insert 620 to move to a second state.

[0077] Specifically, the two fixing blocks 630 have a first guide slope 631 on one side facing each other and a second guide slope 632 on the other side facing away from each other. In the direction away from the rear mold assembly 300, the first guide slope 631 and the second guide slope 632 of the same fixing block 630 are inclined towards each other. When the two first pushers 120 press against the second guide slope 632 of the two fixing blocks 630 respectively, the two fixing blocks 630 move towards each other. When the two second pushers 220 press against the first guide slope 631 of the two fixing blocks 630 respectively, the two fixing blocks 630 move away from each other.

[0078] It is understandable that, since the first guide slope 631 and the second guide slope 632 in the same fixing block 630 are inclined towards each other in the direction opposite to the rear mold assembly 300, the distance between the first guide slope 631 and the second guide slope 632 of the same fixing block 630 gradually decreases. During the mold closing process of the rear mold assembly 300 and the first front mold assembly 100, the first pusher 120 presses against the second guide slope 632 of the fixing block 630. When the first pushing member 120 presses against the fixed block 630, the fixed block 630 is pushed towards the other fixed block 630, thereby realizing the opposite movement of the two fixed blocks 630; during the mold closing process of the rear mold assembly 300 and the second front mold assembly 200, the second pushing member 220 presses against the first guide slope 631 of the fixed block 630, and the fixed block 630 is pushed away from the other fixed block 630 under the pressure of the second pushing member 220, thereby realizing the opposite movement of the two fixed blocks 630. Under the pressure of the second pusher 220, the distance that the fixing block 630 connected to the first insert 610 moves is the length of the second injection cavity in the first direction, and the distance that the fixing block 630 connected to the second insert 620 moves is the length of the third injection cavity 420 in the first direction. Correspondingly, the distance that the two fixing blocks 630 move under the pressure of the first pusher 120 is the same as the distance that they move under the pressure of the second pusher 220, but the direction of movement is opposite, so as to ensure that the first insert 610 and the second insert 620 can switch between a fixed first state and a fixed second state.

[0079] The distance the fixed block 630 moves under the pressure of the first pushing member 120 is related to the distance the first pushing member 120 continues to move toward the fixed block 630 after it abuts against the second guide slope 632. The distance the first front mold assembly 100 and the rear mold assembly 300 move when they close is usually set to a fixed value. Therefore, the distance the first pushing member 120 continues to move toward the fixed block 630 after it abuts against the second guide slope 632 is also affected by the length of the first pushing member 120 in the mold closing direction. The longer the length of the first pushing member 120 in the mold closing direction, the farther the fixed block 630 moves under the pressure of the first pushing member 120. Meanwhile, the distance the fixed block 630 moves under the pressure of the first pushing member 120 is also related to the slope of the second guide slope 632. Taking the mold closing direction as the vertical direction, when the first pushing member 120 moves the same distance toward the fixed block 630, the larger the angle between the second guide slope 632 and the vertical direction, the greater the distance the first pushing member 120 needs to move when it abuts against the second guide slope 632, and the smaller the distance the fixed block 630 moves. Similarly, the length of the second pushing member 220 in the mold closing direction and the slope of the first guide slope 631 also affect the distance the fixed block 630 moves under the pressure of the second pushing member 220. The lengths of the first pushing member 120 and the second pushing member 220 in the mold closing direction can be adjusted according to the actual dimensions required for the design of the third injection cavity 410 and the fourth injection cavity 420, and the slopes of the first guide slope 631 and the second guide slope 632 can also be adjusted.

[0080] By providing two opposing first abutment members 120 on the first front mold assembly 100 and two opposing second abutment members 220 on the second front mold assembly 200, the rear mold assembly 300 can switch between the first insert 610 and the second insert 620 in the first and second states solely through the pressing action of the first abutment members 120 and the second abutment members 220 when it is molded with different front mold assemblies, without the need for an additional power source to drive the first insert 610 and the second insert 620 to move, thus saving the manufacturing cost of the multi-material injection molding die 10.

[0081] Please see Figure 9 and Figure 11In one embodiment, the rear mold assembly 300 includes a rear template 31 and a slider 320 slidably connected to the rear template 31. The rear template 31 and the slider 320 are provided with a receiving cavity 330 for mounting the fixing block 630. The rear template 31 and the slider 320 are provided with a first through hole 340 corresponding to the first pushing member 120 and a second through hole 350 corresponding to the second pushing member 220. The first through hole 340 and the second through hole 350 communicate with the receiving cavity 330. The multi-material injection molding die 10 also includes a first driving member 810 that drives the slider 320 to move along a first direction.

[0082] By providing a receiving cavity 330 for mounting the fixing block 630 on the rear template 31 and the slider 320, the movement range of the fixing block 630 is limited within the receiving cavity 330, thus avoiding the first insert 610 and the second insert 620 from being unable to stabilize in the first state or the second state due to the excessive movement range of the fixing block 630. Specifically, when the first insert 610 and the second insert 620 are in the first state, under the pressing action of the first pushing member 120, the two fixing blocks 630 move towards each other to abut against an inner wall of the receiving cavity 330 in the first direction. Under the constraint of the first pushing member 120 and the receiving cavity 330, the fixing blocks 630 remain stationary, thus maintaining the first insert 610 and the second insert 620 in the first state. When the first insert 610 and the second insert 620 are in the second state, under the pressing action of the second pushing member 220, the two fixing blocks 630 move away from each other to abut against another inner wall of the receiving cavity 330 in the first direction. Under the constraint of the second pushing member 220 and the receiving cavity 330, the fixing blocks 630 remain stationary, thus maintaining the first insert 610 and the second insert 620 in the second state. By setting a slider 320 that is slidably connected to the rear template 31, and then setting a first driving member 810 that drives the slider 320, the slider 320 is driven to move along the first direction. Since one of the fixed blocks 630 is provided on the slider 320, the slider 320 can drive the fixed block 630 provided on it to move together. After injection molding the second injection cavity to obtain the injection assembly 50, the rear mold assembly 300 and the second front mold assembly 200 are separated. Then, the first driving member 810 drives the slider 320 to move away from the injection assembly 50, thereby causing the fixing block 630 provided on the slider 320 to move in the same direction. This causes the first insert 610 or the second insert 620 connected to the fixing block 630 to move away from the injection assembly 50, thereby separating the first insert 610 or the second insert 620 from the injection assembly 50, so that the injection assembly 50 can be removed from the multi-material injection molding mold 10.

[0083] Meanwhile, the rear template 31 and the slider 320 are provided with a first through hole 340 corresponding to the first abutment 120 and a second through hole 350 corresponding to the second abutment 220. The first through hole 340 and the second through hole 350 communicate with the receiving cavity 330. With the mold closing direction as the vertical direction, when the first insert 610 and the second insert 620 are in the first state, the first guide slope 631 of the fixing block 630 is below the second through hole 350, which facilitates the rear mold assembly 300. When the second front mold assembly 200 is closed, the second pusher 220 is inserted into the second through hole 350 and presses against the first guide slope 631; similarly, when the first insert 610 and the second insert 620 are in the second state, the second guide slope 632 of the fixing block 630 is below the first through hole 340, so that when the rear mold assembly 300 is closed with the first front mold assembly 100, the first pusher 120 is inserted into the first through hole 340 and presses against the second guide slope 632.

[0084] Furthermore, the multi-material injection molding die 10 also includes a third insert 710 and a second drive member 820. The third insert 710 is disposed on the rear template 31, and one end of it is inserted into the side of the second injection cavity away from the slider 320. The second drive member 820 is disposed on the rear template 31 and is used to drive the third insert 710 to move along the first direction.

[0085] Taking the fixing block 630 on the slider 320 connected to the first insert 610 as an example, the first insert 610 detaches from the injection assembly 50 under the drive of the slider 320. It is also necessary to separate the injection assembly 50 from the second insert 620 and the rear template 31 before it can detach from the multi-material injection molding mold 10. By inserting one end of the third insert 710, which passes through the rear template 31, into the side of the second injection cavity away from the slider 320, and by providing a second driving member 820 for moving the third insert 710 along a first direction, after the first insert 610 detaches from the injection assembly 50, the second driving member 820 can drive the third insert 710 to move away from the second insert 620, thereby pushing the injection assembly 50 to move away from the second insert 620, thus achieving the detachment of the injection assembly 50 from the second insert 620 and the rear template 31.

[0086] Please see Figure 24 and Figure 25Specifically, in one embodiment, the first injection-molded part 50 is a connector body, which is hollow and includes an inner part 53 and an outer part 52 connected to each other. The first component 54 molded in the third injection cavity 410 and the second component 55 molded in the fourth injection cavity 420 are sealing rings. The sealing ring 54 is wrapped around the outer side of the outer part 52 and the inner side of the inner part 53. Specifically, the connector body is injection molded with hard plastic to ensure the structural strength of the connector body. The connector body includes an inner part 53 for internal connection to the outer component and an outer part 52 for external connection to the outer component. The sealing ring is injection molded with soft plastic and is wrapped around the outer side of the outer part 52 and the inner side of the inner part 53, respectively, to enhance the connection and sealing between the connector body and other external components. The multi-material injection molding die 10 can not only realize injection molding of different materials for the joint body and the sealing ring, but also realize the direct molding of multiple sealing rings on the inner and outer sides of the joint body, which improves the production efficiency of the injection molding assembly 50. Furthermore, by adjusting the shape of the first injection cavity 400 and the position and shape of the third injection cavity 410 and the fourth injection cavity 420, other similar injection molded parts that require injection molding of different materials in different parts can be injection molded, which greatly improves the applicability of the multi-material injection molding die 10.

[0087] Specifically, the multi-material injection molding die 10 further includes a fourth insert 720, which is connected to the slider 320. The first insert 610 is sleeved on the fourth insert 720, and the second insert 620 is sleeved on the third insert 710. The third insert 710 and the fourth insert 720 are used to form the hollow portion of the first injection molded part 51.

[0088] During injection molding of the first injection cavity 400 and the second injection cavity, the third insert 710 and the fourth insert 720 remain in contact to ensure that the portion of the first injection molded part 51 in the final injection molded assembly 50 is hollow. Specifically, the area of ​​the contact portion between the third insert 710 and the fourth insert 720 is smaller than the area of ​​the end of the third insert 710 facing the fourth insert 720, so that after the connector body is formed, it at least partially contacts the end of the third insert 710 facing the fourth insert 720, thereby allowing the third insert 710 to push the injection molded assembly 50 away from the second insert 620.

[0089] Please see Figure 1 and Figure 23In one embodiment, the transfer mechanism includes a turntable 500 and a third driving member connected to the turntable 500. The rear mold assembly 300 is disposed on the turntable 500. The turntable 500 is used to drive the rear mold assembly 300 to rotate and switch between a first station facing the first front mold assembly 100 and a second station facing the second front mold assembly 200.

[0090] The turntable 500 is driven to rotate by the third driving component, which in turn drives the rear mold assembly 300 mounted on the turntable 500 to rotate. When the rear mold assembly 300 is in the first station, it is directly opposite the first front mold assembly 100, facilitating the opening and closing translational movement between the rear mold assembly 300 and the first front mold assembly 100. When the rear mold assembly 300 is in the second station, it is directly opposite the second front mold assembly 200, facilitating the opening and closing translational movement between the rear mold assembly 300 and the second front mold assembly 200. Therefore, the positions of the first front mold assembly 100 and the second front mold assembly 200 relative to the turntable 500 are determined by the position of the rear mold assembly 300 on the turntable 500 at different stations. The angle by which the rear mold assembly 300 rotates from the first station to the second station can be 90°, 180°, 270°, etc. The transfer mechanism can also be other mechanical structures, and the rear mold assembly 300 can switch between the first station and the second station through translational movement.

[0091] Furthermore, in one embodiment, the multi-material injection molding die 10 includes two identical rear mold assemblies 300, which are disposed on the turntable 500 and symmetrically arranged with respect to the radial axis of the turntable 500. In this case, the rear mold assembly 300 rotates 180° from the first station to the second station. When one rear mold assembly 300 is in the first station directly opposite the first front mold assembly 100, the other rear mold assembly 300 is in the second station directly opposite the second front mold assembly 200. The two rear mold assemblies 300 can synchronously perform mold opening and closing movements with the first front mold assembly 100 and the second front mold assembly 200. After the rear mold assembly 300 and the first front mold assembly 100 are molded together, injection molding can be performed to form the first injection molded part 50. When the rear mold assembly 300 is separated and rotated to be molded with the second front mold assembly 200, the other rear mold assembly 300 is molded with the first front mold assembly 100. At this time, injection molding of the first injection cavity 400 and the second injection cavity can be performed simultaneously, thereby speeding up production efficiency.

[0092] Please see Figure 12Specifically, the multi-material injection molding die 10 further includes a fourth driving component 830 and a fixed plate 910 and a sliding plate 920 disposed opposite to each other. The turntable 500 is rotatably connected to the sliding plate 920. The first front mold assembly 100 and the second front mold assembly 200 are disposed on the fixed plate 910. The fourth driving component 830 drives the sliding plate 920 and is used to move the sliding plate 920 toward or away from the fixed plate 910. By setting the fourth driving component 830 to move the sliding plate 920 toward or away from the fixed plate 910, that is, to move the rear mold assembly 300 on the sliding plate 920 toward or away from the first front mold assembly 100 and the second front mold assembly 200 on the fixed plate 910, the opening and closing motion between the rear mold assembly 300 and the first front mold assembly 100 and the second front mold assembly 200 is realized. The multi-material injection molding mold 10 also includes an injection mechanism, which includes a base and a plurality of barrels 70 disposed on the base. The fixed plate 910 and the sliding plate 920 are disposed opposite to each other on the base. The plurality of barrels 70 are respectively connected to the first injection channel 110 and the second injection channel 210 to provide different injection materials.

[0093] The first driving component 810, the second driving component 820, the third driving component and the fourth driving component 830 can be motors, hydraulic cylinders or pneumatic cylinders, etc., which can provide power for the movement or rotation of each component.

[0094] The present invention also proposes a multi-material injection molding assembly mold 20.

[0095] Please see Figures 12 to 20 In this embodiment, the multi-material injection molding assembly mold 20 includes the multi-material injection molding mold 10 and the assembly mechanism as described above. When the rear mold assembly 300 is in the second station and is closed with the second front mold assembly 200, the rear mold assembly 300 and the second front mold assembly 200 further define a fifth injection cavity 40 for molding the second injection molded part 60. The second injection cavity and the fifth injection cavity 40 are spaced apart in a first direction. The assembly mechanism includes a fifth insert 41 and a fifth drive member 42 disposed on the rear mold assembly 300. One end of the fifth insert 41 is inserted into the side of the fifth injection cavity 40 away from the second injection cavity. The fifth drive member 42 is used to drive the fifth insert 41 to move along the first direction, so as to assemble the second injection molded part 60 with the injection molded assembly 50. Since the multi-material injection molding assembly mold 20 of the present invention includes all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0096] Simultaneously, the rear mold assembly 300 and the second front mold assembly 200 define a fifth injection cavity 40 for molding the second injection molded part 60, so that when the injection molded assembly 50 is injection molded into the second injection cavity, the fifth injection cavity 40 can be injection molded to obtain the second injection molded part 60. Furthermore, by providing a fifth insert 41 with one end inserted into the side of the fifth injection cavity 40 away from the second injection cavity, and a fifth drive member 42 for driving the fifth insert 41 to move along a first direction, the second injection molded part 60 can move under the push of the fifth insert 41. Since the second injection cavity and the fifth injection cavity 40 are spaced apart in the first direction, the second injection molded part 60 can be assembled with the injection molded assembly 50 to obtain an assembled assembly. This avoids the manual assembly steps of the second injection molded part 60 and the injection molded assembly 50, improving the production efficiency of the assembled assembly. The fifth injection cavity 40 and the second injection cavity can be set to be independently injection molded, and the injection materials used can be different, that is, the material of the second injection molded part 60 can be adjusted.

[0097] Please see Figures 15 to 17 as well as Figure 22 In one embodiment, the second front mold assembly 200 includes a front template 21 and a cavity member 22 movably disposed on the front template 21 along a first direction. The rear mold assembly 300 includes a rear mold base plate 30, a rear template 31, and a fixing seat 32. The rear template 31 is movably disposed on the rear mold base plate 30 along the mold opening direction. The rear template 31 has receiving grooves extending through both end faces in the mold opening direction. The fixing seat 32 is disposed on the rear mold base plate 30 and located within the receiving groove. The first insert 610 is disposed on the fixing seat 32, and the second insert 620 is disposed on the rear template 31. When the second front mold assembly 200 and the rear mold assembly 300 are closed, the cavity member 22 abuts against the inner sidewall of the rear template 31. The cavity member 22, the front template 21, and the rear template 31 define the fifth injection cavity 40.

[0098] When the second front mold assembly 200 and the rear mold assembly 300 are closed, the cavity component 22, the front template 21 and the rear template 31 define the fifth injection cavity 40. The cavity component 22 is movably disposed on the front template 21 along the first direction. After the second injection molded part 60 is injection molded, the cavity component 22 can move away from the second injection molded part 60 in the first direction to separate the cavity component 22 from the second injection molded part 60. After the second front mold assembly 200 and the rear mold assembly 300 are separated, the front template 21 and the second injection molded part 60 are separated, and the second injection molded part 60 is placed on the rear template 31.

[0099] The rear mold assembly 300 includes a rear mold base plate 30, a rear template 31, and a fixing seat 32. The rear template 31 is movably disposed on the rear mold base plate 30 along the mold opening direction. The rear template 31 has receiving grooves extending through both end faces in the mold opening direction. The fixing seat 32 is disposed on the rear mold base plate 30 and located within the receiving grooves. The first insert 610 is disposed on the fixing seat 32, and the second insert 620 is disposed on the rear template 31. When the first front mold assembly 100 and the rear mold assembly 300 are closed, the first front mold assembly 100, the rear template 31, and the fixing seat 32 are... 2. The first insert 610 and the second insert 620 define the first injection cavity 400. The first insert 610 can move away from the first injection molded part 50 to detach from it. The rear mold plate 31 can move along the mold opening direction to be disposed on the rear mold base plate 30. After the second front mold assembly 200 and the rear mold assembly 300 are separated, the rear mold plate 31 can move away from the rear mold base plate 30, that is, realize the relative movement between the fixed seat 32 and the rear mold plate 31, so that the fixed seat 32 is separated from the first injection molded part 50. Moreover, the rear mold plate 31 drives the injection assembly 50 and the second injection molded part 60 to move together, removing the obstruction of the space between the injection assembly 50 and the second injection molded part 60 by the fixed seat 32, so that the second injection molded part 60 can move smoothly towards the injection assembly 50 and realize the assembly with the injection assembly 50.

[0100] It is understood that, since the cavity component 22 participates in the formation of the fifth injection cavity 40, and the cavity component 22 is separated from the second injection molded part 60 in the first direction, while the assembly direction is parallel to the first direction, the cavity component 22 can be used to form an undercut structure of the second injection molded part 60 in the assembly direction. Since the cavity component 22 is separated from the second injection molded part 60 first, the undercut structure does not affect the assembly of the second injection molded part 60 and the injection assembly 50, increasing the structural diversity of the second injection molded part 60 that can be injection molded by the multi-material injection assembly mold 20, and improving the applicability of the multi-material injection assembly mold 20.

[0101] Specifically, in one embodiment, the second front mold assembly 200 further includes a pressure plate 22c disposed on the side of the front mold plate 21 facing away from the rear mold plate 31. The pressure plate 22c can move toward or away from the front mold plate 21. The cavity component 22 includes a connecting rod 22b and an inclined top 22a. One end of the connecting rod 22b is rotatably connected to the pressure plate 22c, and the other end passes through the front mold plate 21 and is fixedly connected to the inclined top 22a. The connecting rod 22b is inclined in the direction of the fifth injection cavity 40 toward the second injection cavity.

[0102] When the second front mold assembly 200 and the rear mold assembly 300 are closed, the inclined ejector 22a abuts against the inner sidewall of the rear mold plate 31 and the fixed seat 32. The inclined ejector 22a, the front mold plate 21, and the rear mold plate 31 define the fifth injection cavity 40. When the inclined ejector 22a disengages from the second injection molded part 60, the pressure plate 22c moves toward the front mold plate 21, thereby causing the inclined ejector 22a to press against the fixed plate 910. Since the connecting rod 22b is inclined in the direction of the fifth injection cavity 40 toward the second injection cavity, when the pressure plate 22c, through the connecting rod 22b, causes the inclined ejector 22a to press against the fixed seat 32, the inclined ejector 22a, while pressing against the fixed seat 32, also has a tendency to move toward the second injection cavity. As the pressure plate 22c gradually approaches the front mold plate 21, the connecting rod 22b rotates, and the inclined ejector 22a moves away from the fifth injection cavity 40, disengaging from the second injection molded part 60. Preferably, when the pressure plate 22c moves towards the front mold plate 21, the rear mold assembly 300 moves in the same direction and synchronously with the pressure plate 22c, reducing the interaction force between the inclined ejector 22a and the second injection molded part 60 in the mold opening direction, and preventing the inclined ejector 22a from causing the second injection molded part 60 to move together.

[0103] Please see Figure 10 , Figure 15 and Figure 21 In one embodiment, a fixing block 630 is slidably connected to the fixing base 32 and the rear template 31, and the opposite ends of the first insert 610 and the second insert 620 are both connected to the fixing block 630; the first front mold assembly 100 is provided with a first pushing member 120 disposed opposite to each other, which is used to push the two fixing blocks 630 to move towards each other when the mold is closed, so as to drive the first insert 610 and the second insert 620 to move to a first state; the front template 21 is provided with a second pushing member 220 disposed opposite to each other, which is used to push the two fixing blocks 630 to move away from each other when the mold is closed, so as to drive the first insert 610 and the second insert 620 to move to a second state.

[0104] Specifically, the two fixing blocks 630 have a first guide slope 631 on one side facing each other and a second guide slope 632 on the other side facing away from each other. In the direction away from the rear mold assembly 300, the first guide slope 631 and the second guide slope 632 of the same fixing block 630 are inclined towards each other. When the two first pushers 120 press against the second guide slope 632 of the two fixing blocks 630 respectively, the two fixing blocks 630 move towards each other. When the two second pushers 220 press against the first guide slope 631 of the two fixing blocks 630 respectively, the two fixing blocks 630 move away from each other.

[0105] It is understandable that, since the first guide slope 631 and the second guide slope 632 in the same fixing block 630 are inclined towards each other in the direction opposite to the rear mold assembly 300, the distance between the first guide slope 631 and the second guide slope 632 of the same fixing block 630 gradually decreases. During the mold closing process of the rear mold assembly 300 and the first front mold assembly 100, the first pusher 120 presses against the second guide slope 632 of the fixing block 630. When the first pushing member 120 presses against the fixed block 630, the fixed block 630 is pushed towards the other fixed block 630, thereby realizing the opposite movement of the two fixed blocks 630; during the mold closing process of the rear mold assembly 300 and the second front mold assembly 200, the second pushing member 220 presses against the first guide slope 631 of the fixed block 630, and the fixed block 630 is pushed away from the other fixed block 630 under the pressure of the second pushing member 220, thereby realizing the opposite movement of the two fixed blocks 630. Under the pressure of the second pusher 220, the distance that the fixing block 630 connected to the first insert 610 moves is the length of the second injection cavity in the first direction, and the distance that the fixing block 630 connected to the second insert 620 moves is the length of the third injection cavity 420 in the first direction. Correspondingly, the distance that the two fixing blocks 630 move under the pressure of the first pusher 120 is the same as the distance that they move under the pressure of the second pusher 220, but the direction of movement is opposite, so as to ensure that the first insert 610 and the second insert 620 can switch between a fixed first state and a fixed second state.

[0106] The distance the fixed block 630 moves under the pressure of the first pushing member 120 is related to the distance the first pushing member 120 continues to move toward the fixed block 630 after it abuts against the second guide slope 632. The distance the first front mold assembly 100 and the rear mold assembly 300 move when they close is usually set to a fixed value. Therefore, the distance the first pushing member 120 continues to move toward the fixed block 630 after it abuts against the second guide slope 632 is also affected by the length of the first pushing member 120 in the mold closing direction. The longer the length of the first pushing member 120 in the mold closing direction, the farther the fixed block 630 moves under the pressure of the first pushing member 120. Meanwhile, the distance the fixed block 630 moves under the pressure of the first pushing member 120 is also related to the slope of the second guide slope 632. Taking the mold closing direction as the vertical direction, when the first pushing member 120 moves the same distance toward the fixed block 630, the larger the angle between the second guide slope 632 and the vertical direction, the greater the distance the first pushing member 120 needs to move when it abuts against the second guide slope 632, and the smaller the distance the fixed block 630 moves. Similarly, the length of the second pushing member 220 in the mold closing direction and the slope of the first guide slope 631 also affect the distance the fixed block 630 moves under the pressure of the second pushing member 220. The lengths of the first pushing member 120 and the second pushing member 220 in the mold closing direction can be adjusted according to the actual dimensions required for the design of the third injection cavity 410 and the fourth injection cavity 420, and the slopes of the first guide slope 631 and the second guide slope 632 can also be adjusted.

[0107] By providing two opposing first abutment members 120 on the first front mold assembly 100 and two opposing second abutment members 220 on the second front mold assembly 200, the rear mold assembly 300 can switch between the first insert 610 and the second insert 620 in the first and second states solely through the pressing action of the first abutment members 120 and the second abutment members 220 when it is molded with different front mold assemblies, without the need for an additional power source to drive the first insert 610 and the second insert 620 to move, thus saving the manufacturing cost of the multi-material injection molding assembly mold 20.

[0108] Please see Figure 15 and Figure 21In one embodiment, the rear mold assembly 300 further includes a slider 320 slidably connected to the fixed base 32. The rear template 31 and the slider 320 are provided with a receiving cavity 330 for mounting the fixed block 630. The rear template 31 and the slider 320 are provided with a first through hole 340 and a second through hole 350 communicating with the receiving cavity 330. When the rear mold assembly 300 and the first front mold assembly 100 are closed, the first pusher 120 is inserted into the first through hole 340. When the rear mold assembly 300 and the second front mold assembly 200 are closed, the second pusher 220 is inserted into the second through hole 350. The multi-material injection molding assembly mold 20 further includes a first driving member 810 that drives the slider 320 to move along a first direction.

[0109] By providing a receiving cavity 330 for mounting the fixing block 630 on the rear template 31 and the slider 320, the movement range of the fixing block 630 is limited within the receiving cavity 330, thus avoiding the first insert 610 and the second insert 620 from being unable to stabilize in the first state or the second state due to the excessive movement range of the fixing block 630. Specifically, when the first insert 610 and the second insert 620 are in the first state, under the pressing action of the first pushing member 120, the two fixing blocks 630 move towards each other to abut against an inner wall of the receiving cavity 330 in the first direction. Under the constraint of the first pushing member 120 and the receiving cavity 330, the fixing blocks 630 remain stationary, thus maintaining the first insert 610 and the second insert 620 in the first state. When the first insert 610 and the second insert 620 are in the second state, under the pressing action of the second pushing member 220, the two fixing blocks 630 move away from each other to abut against another inner wall of the receiving cavity 330 in the first direction. Under the constraint of the second pushing member 220 and the receiving cavity 330, the fixing blocks 630 remain stationary, thus maintaining the first insert 610 and the second insert 620 in the second state. By setting a slider 320 that is slidably connected to the fixed base 32, and then setting a first driving member 810 that drives the slider 320 to move along the first direction, the slider 320 can be driven to move along the first direction. Since one of the fixed blocks 630 is provided on the slider 320, the slider 320 can drive the fixed block 630 provided on it to move together. After injection molding the second injection cavity to obtain the injection assembly 50, the rear mold assembly 300 and the second front mold assembly 200 are separated. Then, the first drive member 810 drives the slider 320 to move away from the injection assembly 50, so as to drive the fixing block 630 provided on the slider 320 to move in the same direction. This causes the first insert 610 connected to the fixing block 630 to move away from the injection assembly 50, thereby separating the first insert 610 from the injection assembly 50. This facilitates the movement of the rear mold plate 31 relative to the fixing seat 32, separating the injection assembly 50 from the fixing seat 32.

[0110] Meanwhile, the rear template 31 and the slider 320 are provided with a first through hole 340 corresponding to the first abutment 120 and a second through hole 350 corresponding to the second abutment 220. The first through hole 340 and the second through hole 350 communicate with the receiving cavity 330. With the mold closing direction as the vertical direction, when the first insert 610 and the second insert 620 are in the first state, the first guide slope 631 of the fixing block 630 is below the second through hole 350, which facilitates the rear mold assembly 300. When the second front mold assembly 200 is closed, the second pusher 220 is inserted into the second through hole 350 and presses against the first guide slope 631; similarly, when the first insert 610 and the second insert 620 are in the second state, the second guide slope 632 of the fixing block 630 is below the first through hole 340, so that when the rear mold assembly 300 is closed with the first front mold assembly 100, the first pusher 120 is inserted into the first through hole 340 and presses against the second guide slope 632.

[0111] Furthermore, the multi-material injection molding assembly mold 20 also includes a third insert 710 and a second drive member 820. The third insert 710 is disposed on the rear template 31, and one end of it is inserted into the side of the second injection cavity away from the slider 320. The second drive member 820 is disposed on the rear template 31 and is used to drive the third insert 710 to move along the first direction.

[0112] The fixing block 630 on the slider 320 is connected to the first insert 610. The first insert 610 is disengaged from the injection assembly 50 under the action of the slider 320. After the second injection part 60 is assembled with the injection assembly 50 to form an assembly, the assembly needs to be separated from the second insert 620 and the rear template 31 in order to detach it from the multi-material injection assembly mold 20. By inserting one end of the third insert 710, which passes through the rear template 31, into the side of the second injection cavity away from the slider 320, and by providing a second driving member 820 for moving the third insert 710 in a first direction, after the second injection part 60 is assembled with the injection assembly 50, the second driving member 820 can drive the third insert 710 to move towards the first insert 610, thereby pushing the assembly to move towards the first insert 610, and thus detaching the injection assembly 50 from the second insert 620 and the rear template 31.

[0113] Please see Figure 24 and Figure 25Specifically, in one embodiment, the second injection molded part 60 is a connector cap, and the first injection molded part 50 is a connector body. The connector body is hollow and includes an inner connection portion 53 and an outer connection portion 52 connected to each other. The first component 54 molded in the third injection molding cavity 410 and the second component 55 molded in the fourth injection molding cavity are both sealing rings. The sealing rings are wrapped around the outer side of the outer connection portion 52 and the inner side of the inner connection portion 53. Specifically, the connector body is injection molded with hard plastic to ensure the structural strength of the connector body. The connector body includes an inner connection portion 53 for internal connection to the outer component and an outer connection portion 52 for external connection to the outer component. The sealing rings are injection molded with soft plastic and are wrapped around the outer side of the outer connection portion 52 and the inner side of the inner connection portion 53, respectively, to enhance the connection and sealing between the connector body and other external components. The multi-material injection molding assembly mold 20 can not only realize injection molding of different materials for the connector body and the sealing ring, but also realize the direct molding of multiple sealing rings on the inner and outer sides of the connector body, improving the production efficiency of the injection molded assembly 50. Furthermore, by adjusting the shape of the first injection cavity 400, and the position and shape of the third injection cavity 410 and the fourth injection cavity 420, other similar injection molded parts requiring different materials to be injected in different locations can be injection molded, greatly improving the applicability of the multi-material injection molding assembly mold 20. Simultaneously, it can also assemble the connector cap and the connector body, significantly improving production efficiency compared to the method of separately injection molding and demolding the two before assembly.

[0114] The connector cap can be configured to be assembled and connected to the inner part 53 or the outer part 52 of the connector body. By changing the size of the first injection cavity 400 and the fifth injection cavity 40, the gap fit, transition fit or interference fit between the connector cap and the connector body can be realized, so as to realize three states between the connector cap and the connector body: rotatable, fixed and rotatable with damping.

[0115] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A multi-material injection molding assembly mold, characterized in that, Includes multi-material injection molding dies and assembly mechanisms; The multi-material injection molding die includes: First front mold assembly, second front mold assembly, and rear mold assembly; A core-pulling assembly is disposed on the rear mold assembly; and A transfer mechanism for transferring the rear mold assembly between a first station and a second station; The core-pulling assembly includes a first insert and a second insert that are movable relative to each other along a first direction, the first direction being perpendicular to the mold opening direction; the first insert and the second insert have a first state in which they are close to each other along the first direction, and a second state in which they are far apart from each other along the first direction. When the first insert and the second insert are in the first state, and the rear mold assembly is in the first station and is molded with the first front mold assembly, the first insert, the second insert, the rear mold assembly, and the first front mold assembly define a first injection cavity for molding the first injection molded part; When the first insert and the second insert are in the second state, and the rear mold assembly is in the second station and is closed with the second front mold assembly, the first insert, the second insert, the rear mold assembly, and the second front mold assembly define a second injection cavity for molding an injection assembly. The injection assembly includes a first injection part and an injection component disposed on the first injection part. The position vacated by the first insert and the second insert when switching from the first state to the second state is used to mold the injection component. When the rear mold assembly is in the second station and is closed with the second front mold assembly, the rear mold assembly and the second front mold assembly further define a fifth injection cavity for molding a second injection molded part, and the second injection cavity and the fifth injection cavity are spaced apart in the first direction; The assembly mechanism includes a fifth insert and a fifth drive member disposed on the rear mold assembly. One end of the fifth insert is inserted into the side of the fifth injection cavity away from the second injection cavity. The fifth drive member is used to drive the fifth insert to move along a first direction so as to drive the second injection part to assemble with the injection assembly. The rear mold assembly includes a rear mold base plate, a rear mold plate, and a fixed seat. The rear mold plate is movably disposed on the rear mold base plate along the mold opening direction. The rear mold plate has receiving grooves extending through both end faces in the mold opening direction. The fixed seat is disposed on the rear mold base plate and located within the receiving grooves. The first insert is disposed on the fixed seat, and the second insert is disposed on the rear mold plate. After the second front mold assembly and the rear mold assembly are separated, the rear mold plate moves away from the rear mold base plate to achieve relative movement between the fixed seat and the rear mold plate, causing the fixed seat to separate from the first injection molded part. The rear mold plate drives the injection molded assembly and the second injection molded part to move together to release the obstruction of the fixed seat on the space between the injection molded assembly and the second injection molded part, so that the second injection molded part can move toward the injection molded assembly.

2. The multi-material injection molding assembly mold as described in claim 1, characterized in that, The injection molding component includes a first component and a second component. The first insert and the second insert switch to a second state by moving in opposite directions. The position vacated by the movement of the first insert forms a third injection cavity for molding the first component, and the position vacated by the movement of the second insert forms a fourth injection cavity for molding the second component.

3. The multi-material injection molding assembly mold as described in claim 2, characterized in that, The first injection molded part is hollow and includes an inner part and an outer part that are connected to each other. The first component is located on the outside of the outer part, and the second component is located on the inside of the inner part.

4. The multi-material injection molding assembly mold as described in claim 3, characterized in that, The core-pulling assembly further includes ejector pins disposed between the first insert and the second insert. When the first insert and the second insert are in a first state, one ejector pin is connected to one of the first insert and the second insert and abuts against the other, or one ejector pin is connected to the first insert and the other ejector pin is connected to the second insert, with the two ejector pins abutting against each other. When the mold is closed with the rear mold assembly, the first front mold assembly is provided with a first injection channel communicating with the first injection cavity, and the second front mold assembly is provided with a second injection channel communicating with the third injection cavity or the fourth injection cavity.

5. The multi-material injection molding assembly mold as described in claim 4, characterized in that, The first insert and the second insert each have a fixed block connected to their opposite ends, and the two fixed blocks are slidably connected to the rear mold assembly. The first front mold assembly has a first abutting member disposed opposite to each other, which is used to push the two fixed blocks to move towards each other when the mold is closed, so as to drive the first insert and the second insert to move to the first state. The second front mold assembly has a second abutting member disposed opposite to each other, which is used to push the two fixed blocks to move away from each other when the mold is closed, so as to drive the first insert and the second insert to move to the second state.

6. The multi-material injection molding assembly mold as described in claim 5, characterized in that, The two fixing blocks have a first guide slope on one side facing each other and a second guide slope on the other side facing away from each other. In the direction away from the rear mold assembly, the first guide slope and the second guide slope of the same fixing block are inclined towards each other. When the first pusher presses against the second guide slope of the two fixing blocks, the two fixing blocks move towards each other. When the second pusher presses against the first guide slope of the two fixing blocks, the two fixing blocks move away from each other.

7. The multi-material injection molding assembly mold as described in claim 6, characterized in that, The rear mold assembly includes a rear template and a slider slidably connected to the rear template. The rear template and the slider are provided with a receiving cavity for mounting the fixing block. The rear template and the slider are provided with a first through hole corresponding to the first pushing member and a second through hole corresponding to the second pushing member. The first through hole and the second through hole communicate with the receiving cavity. The multi-material injection molding die also includes a first driving member that drives the slider to move along a first direction.

8. The multi-material injection molding assembly mold as described in claim 7, characterized in that, The multi-material injection molding die further includes a third insert and a second drive member. The third insert is disposed on the rear template and one end of it is inserted into the side of the second injection cavity away from the slider. The second drive member is disposed on the rear template and is used to drive the third insert to move along the first direction.

9. The multi-material injection molding assembly mold as described in claim 8, characterized in that, The multi-material injection molding die further includes a fourth insert, which is connected to the slider. The first insert is sleeved on the fourth insert, and the second insert is sleeved on the third insert. The third insert and the fourth insert are used to form a hollow portion of the first injection molded part.

10. The multi-material injection molding assembly mold as described in claim 1, characterized in that, The transfer mechanism includes a turntable and a third driving component that drives the turntable. The rear mold assembly is disposed on the turntable, and the turntable is used to drive the rear mold assembly to rotate and switch between a first station facing the first front mold assembly and a second station facing the second front mold assembly.

11. The multi-material injection molding assembly mold as described in claim 10, characterized in that, The multi-material injection molding die includes two identical rear mold assemblies, which are disposed on the turntable and are symmetrically arranged with respect to the radial axis of the turntable.

12. The multi-material injection molding assembly mold as described in claim 10, characterized in that, The multi-material injection molding die also includes a fourth driving component and a fixed plate and a sliding plate arranged opposite to each other. The turntable is rotatably connected to the sliding plate. The first front mold assembly and the second front mold assembly are disposed on the fixed plate. The fourth driving component is driven and connected to the sliding plate and is used to drive the sliding plate to move toward or away from the fixed plate.

13. The multi-material injection molding assembly mold as described in any one of claims 1 to 12, characterized in that, The second front mold assembly includes a front template and a cavity member movably disposed on the front template along a first direction. The rear mold assembly includes a rear mold base plate, a rear template, and a fixing seat. The rear template is movably disposed on the rear mold base plate along the mold opening direction. The rear template has receiving grooves extending through both end faces in the mold opening direction. The fixing seat is disposed on the rear mold base plate and located within the receiving grooves. The first insert is disposed on the fixing seat, and the second insert is disposed on the rear template. When the second front mold assembly and the rear mold assembly are closed, the cavity member abuts against the inner sidewall of the rear template. The cavity member, the front template, and the rear template define the fifth injection cavity.

14. The multi-material injection molding assembly mold as described in claim 13, characterized in that, The second front mold assembly also includes a pressure plate disposed on the side of the front mold facing away from the rear mold. The pressure plate can move toward or away from the front mold. The cavity component includes a connecting rod and an inclined top. One end of the connecting rod is rotatably connected to the pressure plate, and the other end passes through the front mold and is fixedly connected to the inclined top. The connecting rod is inclined in the direction of the fifth injection cavity toward the second injection cavity.

15. The multi-material injection molding assembly mold as described in claim 13, characterized in that, Fixed blocks are slidably connected to the fixed base and the rear template. The opposite ends of the first insert and the second insert are both connected to the fixed blocks. The first front mold assembly is provided with a first abutting member that is arranged opposite to each other. When the mold is closed, the two fixed blocks are pushed to move towards each other, so as to drive the first insert and the second insert to move to the first state. The front template is provided with a second abutting member that is arranged opposite to each other. When the mold is closed, the two fixed blocks are pushed to move away from each other, so as to drive the first insert and the second insert to move to the second state.

16. The multi-material injection molding assembly mold as described in claim 15, characterized in that, The two fixing blocks have a first guide slope on one side facing each other and a second guide slope on the other side facing away from each other. In the direction away from the rear mold assembly, the first guide slope and the second guide slope of the same fixing block are inclined towards each other. When the first pusher presses against the second guide slope of the two fixing blocks, the two fixing blocks move towards each other. When the second pusher presses against the first guide slope of the two fixing blocks, the two fixing blocks move away from each other.

17. The multi-material injection molding assembly mold as described in claim 16, characterized in that, The rear mold assembly further includes a slider slidably connected to the fixed base. The rear mold plate and the slider are provided with a receiving cavity for installing the fixed block. The rear mold plate and the slider are provided with a first through hole and a second through hole communicating with the receiving cavity at one end facing the front mold plate. When the rear mold assembly and the first front mold assembly are closed, the first pusher is inserted into the first through hole. When the rear mold assembly and the second front mold assembly are closed, the second pusher is inserted into the second through hole. The multi-material injection molding assembly mold further includes a first driving member that drives the slider to move along a first direction.

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