Two-color injection mold

Abstract

The application discloses a double-color injection mold, which comprises an upper mold assembly and a lower mold assembly, the upper mold assembly defines at least one first cavity, the lower mold assembly defines a plurality of second cavities, the plurality of first cavities are communicated through first feeding flow channels, the plurality of second cavities are communicated through second feeding flow channels, a rotating seat is arranged, a gas-ejecting mechanism is arranged in the lower mold assembly, the gas-ejecting mechanism comprises a plurality of gas-ejecting assemblies, an air inlet of the lower mold assembly is communicated with the plurality of gas-ejecting assemblies, each gas-ejecting assembly is opposite to one of the second feeding flow channels, and the gas-ejecting assembly is adapted to extend into the second feeding flow channel. Thus, the plurality of gas-ejecting assemblies are communicated or blocked with the air inlet according to the relative position between the upper mold assembly and the lower mold assembly, so that the double-color plastic product is ejected from the double-color injection mold, and compared with the prior art, the control of the gas-ejecting mechanism does not need to be realized through a relay, and the debugging difficulty of the double-color injection mold can be reduced.

Description

Technical Field

[0001] This invention relates to the field of injection molds, and in particular to a two-color injection mold. Background Technology

[0002] In the process of processing two-color plastic products, the different material parts of the two-color plastic product are formed in different cavities of the two-color injection mold. After both material parts of the two-color plastic product are formed, the two-color plastic product needs to be removed from the cavity.

[0003] In related technologies, two-color injection molds are equipped with multiple ejection mechanisms. Each ejection mechanism is used to eject the two-color plastic product from the cavity of the two-color injection mold. The ejection actions of multiple ejection mechanisms are controlled by relays. After the two-color injection mold completes the injection molding of the two-color plastic product, the relay controls the corresponding ejection mechanism to eject the two-color plastic product from the cavity of the two-color injection mold. However, for different product models, the working steps of the ejection mechanisms of the two-color injection mold are different. Operators need to adjust the relay circuit, which is difficult and has low safety, thus increasing the operating cost of the two-color injection mold. Summary of the Invention

[0004] In order to reduce the debugging difficulty and the usage cost of two-color injection molds, this application provides a two-color injection mold.

[0005] The technical solution for a two-color injection mold provided in this application is as follows:

[0006] A two-color injection mold includes an upper mold assembly and a lower mold assembly, the upper mold assembly and the lower mold assembly being adapted to move closer to or further away from each other along the height direction of the two-color injection mold. The upper mold assembly defines at least one first cavity, and the lower mold assembly defines a plurality of second cavities. The first cavities are adapted to be opposite to and communicate with the second cavities. The plurality of first cavities are connected through a first feed channel, and the plurality of second cavities are connected through a second feed channel. A heating element is provided on the outer side of the feed channel. A rotating seat is fixed to the end of the lower mold assembly away from the upper mold assembly. When the rotating seat is driven by the injection molding equipment, it is adapted to drive the lower mold assembly to rotate around the central axis of the rotating seat, so that the first cavity is directly opposite one of the second cavities; wherein, the lower mold assembly is provided with an air ejector mechanism, the air ejector mechanism includes multiple air ejector components, and the lower mold assembly is provided with an air inlet that communicates with all of the multiple air ejector components, the gas medium is adapted to enter the air ejector mechanism from the air inlet, each air ejector component is opposite to one of the second feed channels, and when the first cavity and the second cavity are connected, the corresponding air ejector component is adapted to extend into the second feed channel when driven by the gas medium.

[0007] By adopting the above technical solution, during the material processing of the two-color injection mold, multiple air ejector components are connected to or blocked from the air inlet according to the relative position between the upper mold component and the lower mold component, so as to eject the two-color plastic product from the inner two-color injection mold. Compared with the existing technology, the control of the air ejector mechanism does not need to be realized through relays, which can reduce the debugging difficulty of the two-color injection mold.

[0008] Preferably, the plurality of air-lift assemblies include a first air-lift assembly and a second air-lift assembly. Each air-lift assembly includes a top-support piston, a cylinder, a support rod, and a sub-inlet channel. The piston is fixedly connected to the support rod. The cylinder and the sub-inlet channel are defined within the lower mold assembly. The piston is movably disposed within the cylinder to drive the support rod to extend into or move out of the second feed channel. The sub-inlet channel is located on the side of the piston away from the support rod.

[0009] By adopting the above technical solution, the air ejector assembly cooperates with the upper mold assembly and the lower mold assembly to combine the two materials to form a two-color plastic product. Furthermore, the air ejector assembly separates the two-color plastic product from the two-color injection mold, thereby achieving the effect of automatic production in the injection molding equipment and improving the production efficiency of the injection molding equipment.

[0010] Preferably, the air-cushioning mechanism further includes an air inlet channel and a switching channel, both defined by the lower mold assembly. One end of the air inlet channel is connected to the air inlet, and the other end is connected to the switching channel. A switching element is movably disposed within the switching channel, and the switching element is adapted to move relative to the switching flow channel between a first position and a second position. In the first position, the switching element closes the portion of the switching channel that connects the second air-cushioning assembly and the air inlet channel, while allowing the remaining portion of the switching channel to connect the first air-cushioning assembly and the air inlet flow path. In the second position, the switching element closes the portion of the switching channel that connects the first air-cushioning assembly and the air inlet channel, while allowing the remaining portion of the switching channel to connect the second air-cushioning assembly and the air inlet flow path.

[0011] By adopting the above technical solution, when the switching member is in the first position, the gas medium cannot enter the second sub-inlet channel through the inlet channel, thereby achieving the effect of the switching member blocking the flow path between the second gas cap assembly and the inlet channel. Furthermore, the other part of the switching channel connects the first gas cap assembly and the inlet flow path, allowing the first gas cap assembly to drive the two-color plastic product out of the second cavity that mates with the first gas cap assembly. Similarly, when the switching member is in the second position, the switching member can seal the part of the switching channel that connects the first gas cap assembly and the inlet channel. When the switching member is in the second position, the gas medium cannot enter the first sub-inlet channel through the inlet channel, thereby achieving the effect of the switching member blocking the flow path between the first gas cap assembly and the inlet channel. Furthermore, the other part of the switching channel connects the second gas cap assembly and the inlet flow path, allowing the first gas cap assembly to drive the two-color plastic product out of the second cavity that mates with the second gas cap assembly.

[0012] Preferably, the upper mold assembly is provided with a drive rod, and the switching member has a driven part. The lower mold assembly moves closer to the upper mold assembly, and the drive rod extends into the lower mold assembly to stop against the switching member. The drive rod is adapted to drive the switching member to move from the first position to the second position, or to drive the switching member to move from the second position to the first position.

[0013] By adopting the above technical solution, the lower mold assembly is driven by the injection molding equipment to approach the upper mold assembly along the height direction of the two-color injection mold, so that the drive rod fixedly connected to the upper mold assembly extends into the lower mold assembly, thereby making the drive rod stop contact with the driven part of the switching component, achieving the effect of the drive rod driving the switching component to move along the axial direction of the switching component, thus realizing the effect of the drive rod driving the switching component to move between the first position and the second position.

[0014] Preferably, the central axis of the drive rod and the central axis of the switching member have an angle, the drive rod is provided with a first guide slope, and the switching member is provided with a second guide slope. The first guide slope and the second guide slope cooperate to push the switching member to move relative to the switching channel.

[0015] By adopting the above technical solution, when the injection molding equipment drives the lower mold assembly to approach the upper mold assembly along the height direction of the two-color injection mold, the first guide slope and the second guide slope make contact with each other, the first guide slope moves along the second guide slope, and the cooperation of the first guide slope and the second guide slope can adjust the direction of the thrust generated by the driving component acting on the switching component, so that the driving rod can drive the switching component to move along the axial direction of the switching component.

[0016] Preferably, there are two drive rods, namely a first drive rod and a second drive rod. When the rotating seat is driven by the injection molding equipment, it is adapted to rotate so that one end of the first drive rod is opposite to one end of the switching member, or rotate so that the second drive rod is opposite to the other end of the switching member. The first drive rod is adapted to drive the switching member to move from the first position to the second position, and the second drive rod is adapted to drive the switching member to move from the second position to the first position.

[0017] By adopting the above technical solution, and by setting the first drive rod and the second drive rod to drive the switching component to move between the first position and the second position, the first air-lift assembly and the second air-lift assembly can be connected to or blocked from the air inlet according to the corresponding second cavity position. The ejection action of the first air-lift assembly and the second air-lift assembly does not need to be realized through the relay circuit, thereby reducing the difficulty of controlling the first air-lift assembly and the second air-lift assembly.

[0018] Preferably, the lower mold assembly is further provided with a clearance hole, and when one of the first drive rod and the second drive rod is engaged with the stop of the switching member, the other of the first drive rod and the second drive rod is inserted into the clearance hole.

[0019] By adopting the above technical solution, by setting a clearance hole in the lower mold assembly, when the upper mold assembly and the lower mold assembly are closed, the first drive rod or the second drive rod is prevented from pressing against the lower mold assembly as much as possible, thereby preventing excessive pressing between the first drive rod or the second drive rod and the lower mold assembly when the upper mold assembly and the lower mold assembly are closed, which could lead to damage to the first drive rod or the second drive rod and the lower mold assembly.

[0020] Preferably, a sealing ring is fitted on the outer side of the switching component. In the first position, the sealing ring abuts against the inner wall of the switching channel to close the portion of the switching channel that connects the second air top assembly and the air intake channel. In the second position, the sealing ring abuts against the inner wall of the switching channel to close the portion of the switching channel that connects the first air top assembly and the air intake channel.

[0021] By adopting the above technical solution, a sealing ring is set on the outside of the switching component. When the first drive rod drives the switching component to move to the first position, the switching component prevents the gas medium from entering the second gas top assembly. Similarly, when the second drive rod drives the switching component to move to the second position, the switching component prevents the gas medium from entering the first gas top assembly.

[0022] Preferably, the lower mold assembly includes a lower mold and a lower mounting base, the lower mold and the lower mounting base are fixedly connected, the lower mounting base defines the air inlet channel, the sub-air inlet channel and the switching channel, the lower mold defines the first cavity, the support rod is disposed in the lower mounting base, and the support rod passes through the lower mold and extends into the second feed channel.

[0023] By adopting the above technical solution, when the first material is injected into the second cavity of the lower mold through the second feeding channel, the injection molding equipment simultaneously drives the lower mold and the lower mounting base to rotate, so that the second cavity is connected to the first cavity. When the second material is injected into the first cavity through the first feeding channel and the two materials are solidified together, the gas medium enters the first air ejector assembly or the second air ejector assembly in sequence through the air intake channel, the switching channel and one of the sub-air intake channels, so that the first support rod or the second support rod separates the two-color plastic product from the second cavity.

[0024] Preferably, the air-cushioning mechanism further includes a locking member disposed on the lower mold assembly, the locking member being used to lock the switching member in the first position and / or lock the switching member in the second position.

[0025] By adopting the above technical solution, when the air intake mechanism is inlet, the switching component can be locked by the locking component, which can prevent the switching component from shifting along the axial direction of the switching component as much as possible. This can improve the reliability of the sealing component sealing the channel on one side of the switching channel, and thus prevent the gas medium from supplying gas to the two air ejector components at the same time. This can also prevent the two air ejector components from simultaneously ejecting the molded two-color plastic products and single-color plastic products out of the corresponding second cavity, thereby improving the product quality of the two-color injection mold.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. In the process of processing materials in a two-color injection mold, multiple air ejector components are connected to or blocked from the air inlet according to the relative position between the upper mold component and the lower mold component, so as to eject the two-color plastic product from the inner two-color injection mold. Compared with the existing technology, the control of the air ejector mechanism does not need to be realized through relays, which can reduce the debugging difficulty of the two-color injection mold.

[0028] 2. When the switching element is in the first position, the gas medium cannot enter the second sub-inlet channel through the inlet channel, thereby achieving the effect of the switching element blocking the flow path between the second air-cushion assembly and the inlet channel. Furthermore, the other part of the switching channel connects the first air-cushion assembly and the inlet flow path, allowing the first air-cushion assembly to drive the two-color plastic product out of the second cavity that mates with the first air-cushion assembly. Similarly, when the switching element is in the second position, it can seal the portion of the switching channel that connects the first air-cushion assembly and the inlet channel. When the switching element is in the second position, the gas medium cannot enter the first sub-inlet channel through the inlet channel, thereby achieving the effect of the switching element blocking the flow path between the first air-cushion assembly and the inlet channel. Furthermore, the other part of the switching channel connects the second air-cushion assembly and the inlet flow path, allowing the first air-cushion assembly to drive the two-color plastic product out of the second cavity that mates with the second air-cushion assembly. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a two-color injection mold according to an embodiment of this application;

[0030] Figure 2 This is a cross-sectional view of a two-color injection mold according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of a portion of the structure of a two-color injection mold according to an embodiment of this application;

[0032] Figure 4 This is a front view of the two-color injection mold according to the embodiments of this application;

[0033] Figure 5 This is a schematic diagram of the two-color injection mold according to an embodiment of this application from another angle;

[0034] Figure 6 This is a cross-sectional view of a portion of the structure of a two-color injection mold according to an embodiment of this application;

[0035] Figure 7 This is a cross-sectional view of a portion of the structure of the two-color injection mold according to an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1000. Two-color injection mold; 100. Upper mold assembly; 101. First cavity; 102. Second cavity; 103. First feed runner; 104. Second feed runner; 105. Upper mold; 106. Upper mounting base; 107. First positioning element; 10. First feed port; 11. Second feed port;

[0038] 200. Lower mold assembly; 201. Air ejector mechanism; 20. Air ejector assembly; 202. Air inlet; 203. First air ejector assembly; 21. First support piston; 23. First support rod; 24. First sub-inlet channel; 204. Second air ejector assembly; 25. Second support piston; 27. Second support rod; 28. Second sub-inlet channel; 205. Inlet channel; 206. Switching channel; 207. Switching component; 208. First drive rod; 209. Second drive rod; 210. First guide slope; 211. Second guide slope; 212. Clearance hole; 214. Sealing ring; 215. Lower mold; 216. Lower mounting base; 217. Second positioning component; 219. Locking component;

[0039] 300. Rotary seat; 301. Cooling tank. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0041] This application discloses a two-color injection mold 1000, which is used to layer and shape various materials to form two-color plastic products. The materials can be PMMA (polymethyl methacrylate) or ABS plastic (Acrylonitrile-Butadiene-Styrene terpolymer).

[0042] Reference Figures 1-7 The two-color injection mold 1000 includes an upper mold assembly 100, a lower mold assembly 200, and a rotating base 300. The upper mold assembly 100 and the lower mold assembly 200 are adapted to move closer to or further apart from each other along the height direction of the two-color injection mold 1000. It should be noted that the height direction of the two-color injection mold 1000 refers to... Figure 2In the vertical direction, the upper mold assembly 100 defines at least one first cavity 101, and the lower mold assembly 200 defines a plurality of second cavities 102. The first cavity 101 is adapted to communicate with the second cavity 102. When the first cavity 101 is not connected to the second cavity 102, the second cavity 102 can be injection molded with a first material. When the first cavity 101 is connected to the second cavity 102, the second cavity 102 contains the first material, and the first cavity 101 can be injection molded with a second material. Furthermore, the plurality of second cavities 102 can be cyclically connected with the corresponding first cavities 101, thereby realizing the continuous processing of two-color plastic products by the two-color injection mold 1000.

[0043] Multiple first cavities 101 are connected by a first feed channel 103, and multiple second cavities 102 are connected by a second feed channel 104. The upper mold assembly 100 has a first feed port 10 and a second feed port 11. The first feed port 10 is connected to the first feed channel 103, and the second feed port 11 is connected to the second feed channel 104. Second material can be injected into the first feed channel 103 through the first feed port 10, and then the first feed channel 103 can guide the second material into the first cavity 101. First material can be injected into the second feed channel 104 through the second feed port 11, and then the second feed channel 104 can guide the first material into the second cavity 102.

[0044] Furthermore, cooling components are provided on the outer sides of the first feed channel 103 and the second feed channel 104. The cooling components can cool and shape the material in the first cavity 101 or the second cavity 102. The cooling components can be constructed as cooling channels, and the heat exchange medium can exchange heat with the material in the first cavity 101 or the second cavity 102 in the cooling channels.

[0045] The rotating seat is fixed to the end of the lower mold assembly 200 away from the upper mold assembly 100. The injection molding equipment can drive the rotating seat to rotate along the central axis of the rotating seat. The rotating seat can drive the lower mold assembly 200 to rotate along the central axis of the rotating seat so that the first cavity 101 can be directly aligned with one of the multiple second cavities 102. Furthermore, the injection molding equipment can drive the lower mold assembly 200 to move along the height direction of the two-color injection mold 1000 via the rotating seat. Specifically, the upper mold assembly 100 is provided with a first positioning member 107, and the lower mold assembly 200 is provided with a second positioning member 217. The first positioning member 107 is configured as a positioning shaft, and the second positioning member 217 is configured as a positioning bushing. The first positioning member 107 is adapted to extend into the second positioning member 217. The first positioning member 107 and the second positioning member 217 cooperate to make the first cavity 101 and the second cavity 102 directly aligned.

[0046] When the two-color injection mold 1000 injects material, the injection molding equipment drives the lower mold assembly 200 to move upward along the height direction of the two-color injection mold 1000 via a rotary seat. This causes the second positioning member 217 to approach the first positioning member 107 along the height of the two-color injection mold 1000, thereby connecting the first cavity 101 with a portion of the second cavity 102, while preventing the other portion of the second cavity 102 from connecting with the first cavity 101. The injection molding equipment can simultaneously inject the second material into the first cavity 101 and the first material into the second cavity 102, which is not connected to the first cavity 101. After both the first cavity 101 and the second cavity 102 have been injected with material, the lower mold assembly 200 separates from the upper mold assembly 100, and the formed two-color plastic product is removed from the lower mold assembly 200. The rotary seat then drives the second cavity 102, which contains the first material, to align with the first cavity 101, thus achieving the technical effect of continuous molding of two-color plastic products using the two-color injection mold 1000. Furthermore, the rotary seat has a cooling tank 301. By setting the cooling tank 301 on the rotary seat, and having a heat exchange medium flowing in the cooling tank 301, the heat of the material can be prevented from being transferred to the injection molding equipment through the lower mold assembly 200 as much as possible, thereby preventing damage to the injection molding equipment as much as possible.

[0047] Meanwhile, an air ejector mechanism 201 is provided within the lower mold assembly 200. The air ejector mechanism 201 includes multiple air ejector components 20. The lower mold assembly 200 is also provided with an air inlet 202, which is connected to all the air ejector components 20. Gas medium can enter the air ejector mechanism 201 from the air inlet 202. Each air ejector component 20 can be opposite to one of the second feed channels 104. After the injection mold completes the injection of two materials and the two materials cool and solidify, the injection molding equipment drives the lower mold assembly 200 along the two-color... The injection mold 1000 moves downward in height, and the gas medium enters the air ejector mechanism 201 through the air inlet 202. When the air ejector assembly 20 is driven by the gas medium, it is adapted to extend into the second feed channel 104. The air ejector assembly 20 ejects the two-color plastic product by lifting the sprue material in the second feed channel 104. Two-color plastic products with two materials can be ejected by the corresponding air ejector assembly 20, which makes it easier for the robotic arm to take the two-color plastic product out of the two-color injection mold 1000.

[0048] Therefore, during the material processing process of the two-color injection mold 1000, by connecting or blocking the air inlet 202 with multiple air ejector components 20 according to the relative position between the upper mold component 100 and the lower mold component 200, the two-color plastic product is ejected from the inner two-color injection mold 1000. Compared with the prior art, the control of the air ejector mechanism 201 does not need to be realized through relays, which can reduce the debugging difficulty of the two-color injection mold 1000.

[0049] See Figure 3In some embodiments of this application, the plurality of air-lift assemblies 20 include a first air-lift assembly 203 and a second air-lift assembly 204. The first air-lift assembly 203 includes a first support piston 21, a first cylinder, a first support rod 23, and a first sub-inlet channel 24. The second air-lift assembly 204 includes a second support piston 25, a second cylinder, a second support rod 27, and a second sub-inlet channel 28. The first piston is fixedly connected to the first support rod 23. The lower mold assembly 200 defines the first cylinder and the first sub-inlet channel 24. The first piston is movably disposed at the first... Inside a cylinder, a first piston is adapted to drive a first support rod 23 to extend into or move out of a second feed channel 104. A first sub-intake channel 24 is located on the side of the first piston away from the first support rod 23. Similarly, a second piston is fixedly connected to a second support rod 27. A second cylinder and a second sub-intake channel 28 are defined within the lower mold assembly 200. The second piston is movably disposed inside the second cylinder and is adapted to drive a second support rod 27 to extend into or move out of the second feed channel 104. The second sub-intake channel 28 is located on the side of the second piston away from the second support rod 27.

[0050] Specifically, the multiple second cavities 102 can be divided into two groups, each group of second cavities 102 including at least one second cavity 102. The second cavities 102 of the first group correspond to the second support rod 27, and the second cavities 102 of the second group correspond to the first support rod 23. When the first material is injected into the second cavity 102 of the first group through the second feed channel 104, the second piston is positioned close to the inner side of the second cylinder, and the first material solidifies in the second cavity 102 of the first group. At the same time, a portion of the first material solidifies in the second feed channel 104 connected to the second cavity 102 of the first group to form sprue material, which contacts the first support rod 23.

[0051] Furthermore, the rotating seat 300 drives the lower mold assembly 200 away from the upper mold assembly 100, and the rotating seat 300 drives the lower mold 215 to rotate, so that the first group of second cavities 102 are aligned with the corresponding first cavities 101. After the first group of second cavities 102 are connected to the first cavities 101, the second material is injected into the first cavity 101 through the first feed channel 103. It should be noted that there can be multiple first feed channels 103, and multiple first feed channels 103 are connected to multiple first cavities 101. 01 is connected, and the first material is injected into the second set of second cavities 102 through the second feed channel 104. After the cooling component cools the material in the first cavity 101 and the second cavity 102, the injection molding equipment drives the lower mold assembly 200 away from the upper mold assembly 100. At this time, the first material is solidified in the second set of second cavities 102, and a part of the first material is solidified in the second feed channel 104 connected to the second set of second cavities 102 to form sprue material, which contacts the first support rod 23.

[0052] Simultaneously, the gas medium enters the second cylinder through the second sub-inlet channel 28. The gas medium can increase the air pressure in the first cylinder, so that the second top support piston 25 drives the second support rod 27 to move upward along the height direction of the two-color injection mold 1000. The second support rod 27 drives the plastic product in the second cavity 102 of the first group to move upward along the height direction of the two-color injection mold 1000 through the sprue material, so as to achieve the technical effect that the two-color plastic product driven by the air ejector mechanism 201 is ejected from the lower mold assembly 200. Similarly, the rotating seat 300 drives the second cavity 102 of the second group to rotate in the opposite direction around the central axis of the rotating seat 300, so that the second cavity 102 of the second group is directly opposite the corresponding first cavity 101, and the second cavity 102 of the first group returns to the initial position. When the second material is injected into the first cavity 101 through the first feed channel 103 and the second material is cooled and formed, the injection molding equipment drives the lower mold assembly 200 away from the upper mold assembly 100. The gas medium enters the first cylinder through the first air intake channel 205 to increase the air pressure in the first cylinder, thereby causing the first top support piston 21 to drive the first support rod 23 to move upward along the height direction of the two-color injection mold 1000, thereby causing the two-color plastic product to be ejected from the second cavity 102 of the second group.

[0053] Therefore, by cooperating with the upper mold assembly 100 and the lower mold assembly 200, the two materials are combined to form a two-color plastic product. Furthermore, the two-color plastic product is separated from the two-color injection mold 1000 by the air ejector assembly 20, which can achieve the effect of automatic production of the injection molding equipment and thus improve the production efficiency of the injection molding equipment.

[0054] See Figure 3 In some embodiments of this application, the air-cushioning mechanism 201 further includes an air inlet channel 205 and a switching channel 206. Both the air inlet channel 205 and the switching channel 206 are defined by the lower mold assembly 200. One end of the air inlet channel 205 is connected to the air inlet 202, and the other end of the air inlet channel 205 is connected to the switching channel 206. A switching element 207 is movably disposed in the switching channel 206. The switching element 207 is adapted to move between a first position and a second position relative to the switching flow channel. When the switching element 207 is in the first position, the switching element 207 can close part of the channel of the switching channel 206 that connects the second air top assembly 204 and the air inlet channel 205. Specifically, when the switching element 207 is in the first position, the gas medium cannot enter the second sub-air inlet channel 28 through the air inlet channel 205, thereby achieving the effect of the switching element 207 blocking the flow path between the second air top assembly 204 and the air inlet channel 205. In addition, the other part of the switching channel 206 connects the first air top assembly 203 and the air inlet flow path, so that the first air top assembly 203 can drive the two-color plastic product to detach from the second cavity 102 that cooperates with the first air top assembly 203.

[0055] Similarly, when the switching element 207 is in the second position, the switching element 207 can seal a portion of the switching channel 206 that connects the first air top assembly 203 and the air inlet channel 205, preventing the gas medium from entering the first sub-air inlet channel 24 through the air inlet channel 205. This achieves the effect of the switching element 207 blocking the flow path between the first air top assembly 203 and the air inlet channel 205. Furthermore, the other portion of the switching channel 206 connects the second air top assembly 204 and the air inlet flow path, enabling the second air top assembly 204 to drive the two-color plastic product to detach from the second cavity 102 that mates with the second air top assembly 204.

[0056] See Figures 3-5 In some embodiments of this application, the upper mold assembly 100 is provided with a drive rod, and the switching member 207 has a driven portion. As the lower mold assembly 200 moves closer to the upper mold assembly 100, the drive rod extends into the lower mold assembly 200 to abut against the switching member 207, and the drive rod can drive the switching member 207 to move from a first position to a second position. Similarly, after the lower mold assembly 200 rotates once relative to the upper mold assembly 100, when the lower mold assembly 200 moves closer to the upper mold assembly 100 again, the drive rod can drive the switching member 207 to move from the second position to the first position. The lower mold assembly 200 is driven by the injection molding equipment to approach the upper mold assembly 100 along the height direction of the two-color injection mold 1000, so that the drive rod fixedly connected to the upper mold assembly 100 extends into the lower mold assembly 200, thereby making the drive rod stop contact with the driven part of the switching member 207, achieving the effect of the drive rod driving the switching member 207 to move along the axial direction of the switching member 207, thus realizing the effect of the drive rod driving the switching member 207 to move between the first position and the second position.

[0057] See Figure 3 In some embodiments of this application, the central axis of the drive rod and the central axis of the switching member 207 are at an angle. Specifically, the drive rod and the switching member 207 are arranged perpendicularly to each other. The drive rod is provided with a first guide slope 210, and the driven part of the switching member 207 is provided with a second guide slope 211. The first guide slope 210 and the second guide slope 211 can abut against each other. When the injection molding equipment drives the lower mold assembly 200 to approach the upper mold assembly 100 along the height direction of the two-color injection mold 1000, the first guide slope 210 and the second guide slope 211 abut against each other, and the first guide slope 210 moves along the second guide slope 211. The cooperation of the first guide slope 210 and the second guide slope 211 can adjust the direction of the thrust generated by the drive member acting on the switching member 207, so that the drive rod can drive the switching member 207 to move along the axial direction of the switching member 207.

[0058] See Figures 3-5In some embodiments of this application, the two-color injection mold 1000 is provided with two drive rods, namely the first drive rod 208 and the second drive rod 209. The injection molding equipment drives one end of the switching member 207 to be opposite to the first drive rod 208 through the rotating seat. When the first drive rod 208 and one end of the switching member 207 come into contact, the switching member 207 moves from the second position to the first position. At this time, the switching member 207 closes the second air top assembly 204 and the air inlet channel 205, and the switching member 207 connects the first air top assembly 203 and the air inlet channel 205.

[0059] Similarly, the injection molding equipment drives the other end of the switching component 207 to be opposite to the second drive rod 209 by rotating the rotary seat. When the second drive rod 209 comes into contact with the other end of the switching component 207, the switching component 207 moves from the first position to the second position. At this time, the switching component 207 blocks the first air intake channel 205 and the air intake channel 205, and the switching component 207 connects the second air ejector assembly 204 and the air intake channel 205. By setting the first drive rod 208 and the second drive rod 209 to drive the switching component 207 to move between the first position and the second position, the first air ejector assembly 203 and the second air ejector assembly 204 can be connected to or blocked from the air intake port 202 according to the corresponding position of the second cavity 102. The ejection action of the first air ejector assembly 203 and the second air ejector assembly 204 does not need to be realized through the relay circuit, thereby reducing the difficulty of controlling the first air ejector assembly 203 and the second air ejector assembly 204.

[0060] See Figure 3 In some embodiments of this application, the lower mold assembly 200 is further provided with a clearance hole 212. When one of the first drive rod 208 and the second drive rod 209 is engaged with the switching member 207, the other of the first drive rod 208 and the second drive rod 209 is inserted into the clearance hole 212. Specifically, during the injection molding process of the two-color injection mold 1000 and when the first drive rod 208 is engaged with the switching member 207, the switching member 207 is in the first position, and the second drive rod 209 extends into the clearance hole 212. Similarly, during the injection molding process of the two-color injection mold 1000 and when the second drive rod 209 is engaged with the switching member 207, the switching member 207 is in the second position, and the first drive rod 208 extends into the clearance hole 212. Therefore, by providing a clearance hole 212 in the lower mold assembly 200, when the upper mold assembly 100 and the lower mold assembly 200 are closed, the first drive rod 208 or the second drive rod 209 is prevented from pressing against the lower mold assembly 200 as much as possible. This prevents the first drive rod 208 or the second drive rod 209 from pressing excessively against the lower mold assembly 200 when the upper mold assembly 100 and the lower mold assembly 200 are closed, thus preventing damage to the first drive rod 208 or the second drive rod 209 and the lower mold assembly 200.

[0061] See Figure 2 In some embodiments of this application, the outer bushing of the switching member 207 is provided with a sealing ring 214. The sealing ring 214 can abut against the inner wall of the switching channel 206. The sealing ring 214 is used to block the air intake channel 205 from the first sub-air intake channel 24 or the second sub-air intake channel 28. When the switching member 207 is in the first position, the sealing ring 214 blocks the air intake channel 205 and the second sub-air intake channel 28. Similarly, when the switching member 207 is in the second position, the sealing ring 214 blocks the air intake channel 205 and the first sub-air intake channel 24. By providing a sealing ring 214 on the outer side of the switching member 207, when the first drive rod 208 drives the switching member 207 to move to the first position, the switching member 207 achieves the effect of preventing the gas medium from entering the second gas top assembly 204. Similarly, when the second drive rod 209 drives the switching member 207 to move to the second position, the switching member 207 achieves the effect of preventing the gas medium from entering the first gas top assembly 203.

[0062] See Figure 3 In some embodiments of this application, the lower mold assembly 200 includes a lower mold 215 and a lower mounting base 216. The lower mold 215 and the lower mounting base 216 are fixedly connected. The lower mounting base 216 defines an air inlet channel 205, a sub-air inlet channel 205, and a switching channel 206. The lower mold 215 defines a second cavity 102. A first support rod 23 and a second support rod 27 are disposed in the lower mounting base 216, and the first support rod 23 and the second support rod 27 can pass through the lower mold 215 and extend into the second feed channel 104. The lower mounting base 216 is fixedly connected to the rotary disk. Specifically, the lower mounting base 216 is disposed between the rotary disk and the lower mold 215. When the first material is injected into the second cavity 102 of the lower mold 215 through the second feeding channel, the injection molding equipment simultaneously drives the lower mold 215 and the lower mounting base 216 to rotate, so that the second cavity 102 is connected to the first cavity 101. When the second material is injected into the first cavity 101 through the first feeding channel 103 and the two materials solidify together, the gas medium sequentially enters the first air ejector assembly 203 or the second air ejector assembly 204 through the air intake channel 205, the switching channel 206 and one of the sub-air intake channels 205, so that the first support rod 23 or the second support rod 27 separates the two-color plastic product from the second cavity 102.

[0063] See Figure 2In some embodiments of this application, the air-cushioning mechanism 201 further includes a locking member 219, which is disposed on the lower mold assembly 200. The locking member 219 is used to lock the switching member 207 in a first position or a second position. Specifically, the positioning structure may include a receiving member, an elastic member, and a top ball. The receiving member has a receiving groove, and the top ball is installed in the receiving groove. The top ball is adapted to extend into or move out of the receiving member, and the elastic member is disposed between the inner bottom wall of the receiving member and the top ball. The lower mounting base 216 may also be provided with a mounting hole for installing the receiving member. The switching member 207 has a locking groove, and the top ball is adapted to extend into the locking groove so that the top ball and the locking groove are positioned and engaged, thereby locking the switching member 207 in the first position or the second position. When the air intake mechanism takes in air, the locking member 219 locks the switching member 207, which can prevent the switching member 207 from shifting in the axial direction as much as possible. This can improve the reliability of the sealing member sealing the channel on one side of the switching channel 206, and thus prevent the gas medium from being supplied to the two air ejector assemblies 20 at the same time. This can also prevent the two air ejector assemblies 20 from simultaneously ejecting the molded two-color plastic product and the single-color plastic product out of the corresponding second cavity 102, thereby improving the product quality of the two-color injection mold 1000.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A two-color injection mold, characterized in that, include: An upper mold assembly (100) and a lower mold assembly (200) are provided, wherein the upper mold assembly (100) and the lower mold assembly (200) are adapted to be close to or far from each other along the height direction of the two-color injection mold (1000), the upper mold assembly (100) defines at least one first cavity (101), and the lower mold assembly (200) defines a plurality of second cavities (102), wherein the first cavities (101) are adapted to be opposite to and communicate with the second cavities (102), the plurality of first cavities (101) are communicated with each other through a first feed channel (103), the plurality of second cavities (102) are communicated with each other through a second feed channel (104), and a cooling element is provided on the outside of the feed channel; A rotating seat (300) is fixed to one end of the lower mold assembly (200) away from the upper mold assembly (100). When the rotating seat (300) is driven by the injection molding equipment, it is adapted to drive the lower mold assembly (200) to rotate around the central axis of the rotating seat (300) so that the first cavity (101) is directly opposite one of the second cavities (102). The lower mold assembly (200) is provided with an air ejector mechanism (201), which includes a plurality of air ejector components (20). The lower mold assembly (200) is provided with an air inlet (202) that communicates with the plurality of air ejector components (20). The gas medium is adapted to enter the air ejector mechanism (201) from the air inlet (202). Each air ejector component (20) is opposite to one of the second feed channels (104). When the first cavity (101) and the second cavity (102) are connected, the corresponding air ejector component (20) is adapted to extend into the second feed channel (104) when driven by the gas medium. The plurality of air-cushion assemblies (20) include a first air-cushion assembly (203) and a second air-cushion assembly (204). The air-cushion mechanism (201) further includes an air inlet channel (205) and a switching channel (206). The air inlet channel (205) and the switching channel (206) are both defined by the lower mold assembly (200). One end of the air inlet channel (205) is connected to the air inlet (202), and the other end of the air inlet channel (205) is connected to the switching channel (206). A switching element (207) is movably disposed in the switching channel (206). The switching element (207) is adapted to move relative to the switching channel (206) between a first position and a second position. In the first position, the switching element (207) closes a portion of the switching channel (206) that connects the second air top assembly (204) and the air intake channel (205), and allows the other portion of the switching channel (206) to connect the first air top assembly (203) and the air intake channel (205). In the second position, the switching element (207) closes a portion of the switching channel (206) that connects the first air top assembly (203) and the air intake channel (205), and allows the other portion of the switching channel (206) to connect the second air top assembly (204) and the air intake channel (205); The upper mold assembly (100) is provided with a drive rod, and the switching member (207) has a driven part. The lower mold assembly (200) moves closer to the upper mold assembly (100). The drive rod extends into the lower mold assembly (200) to stop against the switching member (207). The drive rod is adapted to drive the switching member (207) to move from the first position to the second position, or drive the switching member (207) to move from the second position to the first position.

2. A two-color injection mold according to claim 1, characterized in that, The plurality of air-cushion assemblies (20) include a first air-cushion assembly (203) and a second air-cushion assembly (204). Each air-cushion assembly (20) includes a top support piston, a cylinder, a support rod, and a sub-inlet channel (205). The piston is fixedly connected to the support rod. The cylinder and the sub-inlet channel (205) are defined within the lower mold assembly (200). The piston is movably disposed within the cylinder to drive the support rod to extend into or move out of the second feed channel (104). The sub-inlet channel (205) is located on the side of the piston away from the support rod.

3. A two-color injection mold according to claim 1, characterized in that, The central axis of the drive rod and the central axis of the switching member (207) are at an angle. The drive rod is provided with a first guide slope (210), and the switching member (207) is provided with a second guide slope (211). The first guide slope (210) and the second guide slope (211) are in a stop-and-go cooperation to push the switching member (207) to move relative to the switching channel (206).

4. A two-color injection mold according to claim 1, characterized in that, There are two drive rods, namely a first drive rod (208) and a second drive rod (209). When the rotating seat (300) is driven by the injection molding equipment, it is adapted to rotate so that one end of the first drive rod (208) is opposite to one end of the switching member (207), or rotate so that the other end of the second drive rod (209) is opposite to the other end of the switching member (207). The first drive rod (208) is adapted to drive the switching member (207) from the first position to the second position, and the second drive rod (209) is adapted to drive the switching member (207) from the second position to the first position.

5. A two-color injection mold according to claim 4, characterized in that, The lower mold assembly (200) is also provided with a clearance hole (212). When one of the first drive rod (208) and the second drive rod (209) is engaged with the switching member (207), the other of the first drive rod (208) and the second drive rod (209) is inserted into the clearance hole (212).

6. A two-color injection mold according to claim 1, characterized in that, A sealing ring (214) is sleeved on the outside of the switching component (207). In the first position, the sealing ring (214) abuts against the inner wall of the switching channel (206) to close the part of the switching channel (206) that connects the second air top assembly (204) and the air intake channel (205). In the second position, the sealing ring (214) abuts against the inner wall of the switching channel (206) to close a portion of the switching channel (206) that connects the first air top assembly (203) and the air intake channel (205).

7. A two-color injection mold according to claim 2, characterized in that, The lower mold assembly (200) includes a lower mold (215) and a lower mounting base (216). The lower mold (215) and the lower mounting base (216) are fixedly connected. The lower mounting base (216) defines the air inlet channel (205), the sub-air inlet channel (205), and the switching channel (206). The lower mold (215) defines the first cavity (101). The support rod is disposed in the lower mounting base (216) and extends into the second feed channel (104) after passing through the lower mold (215).

8. A two-color injection mold according to claim 1, characterized in that, The air-cushioning mechanism (201) further includes a locking member (219), which is disposed on the lower mold assembly (200). The locking member (219) is used to lock the switching member (207) in the first position and / or lock the switching member (207) in the second position.

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