Double-color mold

Abstract

The invention belongs to the technical field of molds, and discloses a double-color mold which comprises a male mold and two female molds, a male mold core is arranged on the male mold, a jet flow channel is arranged on the male mold core, the number of the female molds is two, and a first female mold core and a second female mold core are arranged on the two female molds respectively; one of the two female dies can be selected to be combined with the male die so as to form a first forming cavity for primary forming and a second forming cavity for secondary forming; the middle section of one jet flow channel is provided with a latent flow channel, so that when a stub bar in the jet flow channel is ejected out after one-time forming, the position, corresponding to the latent flow channel, of the stub bar can be broken, and the part, located on the downstream portion of the latent flow channel, of the stub bar is reserved in the jet flow channel. According to the double-color mold, fluid for secondary injection molding can be prevented from flowing backwards into the first injection runner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold, in particular to a double-color mold. BACKGROUND

[0002] Double-color injection molding refers to injecting two different materials into the same mold to realize the molding process of the parts formed by two materials, some of which are different colors and some of which are different in hardness. The thickness requirement of some double-color injection molding products is getting higher and higher, for example, the double-color foot pad at the bottom of electronic products such as notebook computers and tablet computers, which includes a bottom layer and a surface layer. The hardness of the bottom layer material is greater than that of the surface layer material. Since the double-layer foot pad needs to have a certain elasticity, the surface layer cannot be thinned too much, and only the thickness of the bottom layer can be thinned as much as possible.

[0003] The above product is injection molded by a double-color mold. Two molds are arranged on the machine table of the double-color mold. The male mold core structures of the two molds are consistent, referring to Figures 1 to 3 The inside of the male mold core 1 is provided with a first injection channel 12 for injecting the bottom layer 100 material and a second injection channel 13 for injecting the surface layer 200 material. The outlet ends of the first injection channel 12 and the second injection channel 13 are both in the form of horn-shaped glue inlet from the bottom of the cavity. Glue inlet channels are arranged on the female mold cores of the two molds. The difference between the female mold cores of the two molds lies in the different directions of the molding cavities and the glue inlet channels. During the working process of the double-color mold, when the first male mold core 1 is combined with the first female mold core, the first injection channel 12 is connected to the glue inlet channel on the first female mold core to inject the bottom layer 100. After the bottom layer 100 is formed, the first male mold core 1 and the first female mold core are separated, and the injection-molded material head part is ejected at the same time. Then the machine table drives the male mold core 1 to rotate, and then the first male mold core 1 is combined with the second female mold core. At this time, the second injection channel 13 is connected to the glue inlet channel on the second female mold core to inject the surface layer 200. At the same time, the second male mold core 1 is combined with the first female mold core to continue to inject the bottom layer 100.

[0004] Since the inlet sections of the glue inlet channels on the two female mold cores coincide, after the bottom layer is injection molded, that is, after the first injection molding, the material head generated by the injection molded bottom layer will block the glue inlet channel. The material head needs to be ejected after the bottom layer is formed to facilitate the injection of the surface layer. This will cause the position of the outlet end of the first injection channel corresponding to the bottom of the bottom layer to be suspended, that is, the first injection point is suspended. In addition, the thickness of the bottom layer is small, and the high temperature and high pressure generated during the second injection molding can easily shoot the bottom layer above the first injection point, causing the fluid of the second injection molding to backflow to the outlet end of the first injection channel. SUMMARY

[0005] The purpose of the present application is to provide a double-color mold to prevent the fluid of the second injection molding from backflowing to the first injection channel.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] The double-color mold comprises a male mold and two female molds, the male mold is provided with a male mold core, the male mold core is provided with a jet channel, the two female molds are provided with a first female mold core and a second female mold core respectively, and the two female molds can be combined with the male mold to form a first molding cavity for one-time molding and a second molding cavity for two-time molding.

[0008] The middle section of the jet channel is provided with a latent jet channel, so that when the sprue in the interior of the jet channel is ejected after one-time molding, the position corresponding to the latent jet channel of the sprue can be broken, and the part of the sprue downstream of the latent jet channel remains in the interior of the jet channel.

[0009] Preferably, the jet channel comprises:

[0010] A jet main channel is arranged on the surface of the male mold core, the jet main channel is located upstream of the latent jet channel and communicates with the inlet end of the latent jet channel, and the outlet end of the latent jet channel extends to the interior of the male mold core.

[0011] A jet sub-channel is located downstream of the latent jet channel, the jet sub-channel communicates the outlet end of the latent jet channel and the first molding cavity, the ejection direction of the part of the sprue in the interior of the jet sub-channel and the part of the sprue in the interior of the latent jet channel is crossed, so that when the sprue is ejected, the position corresponding to the connection between the latent jet channel and the jet sub-channel of the sprue can be broken, and the part of the sprue in the interior of the jet sub-channel remains in the interior of the jet channel.

[0012] Preferably, the cross-sectional area of the latent jet channel gradually decreases from the inlet end to the outlet end.

[0013] Preferably, the jet sub-channel comprises:

[0014] A latent jet sub-channel is arranged in the interior of the male mold core, the latent jet sub-channel is arranged along the mold opening direction of the product, and the latent jet sub-channel communicates with the outlet end of the latent jet channel.

[0015] A surface jet sub-channel is arranged on the surface of the male mold core, and the surface jet sub-channel communicates with the outlet end of the latent jet sub-channel.

[0016] The injection one-way runner is arranged inside the male core, and communicates the surface one-way runner and the first forming cavity.

[0017] As preferred, the first forming cavity is arranged in plurality, and the one-way runner is arranged one for each of the first forming cavity, and the one-way main runner communicates the latent runner through an intermediate runner.

[0018] As preferred, the two-color mold further comprises an ejection device configured to eject the part of the sprue inside the one-way main runner and the part of the sprue remaining inside the one-way runner, respectively.

[0019] As preferred, the ejection device comprises:

[0020] a first ejection mechanism configured to eject the part of the sprue inside the one-way main runner; and

[0021] a second ejection mechanism configured to eject the part of the sprue remaining inside the one-way runner.

[0022] As preferred, the first ejection mechanism comprises:

[0023] a first ejection rod slidingly arranged through the male core, an axis of the first ejection rod being parallel to the opening direction of the product, and an end of the first ejection rod extending into the one-way main runner; and

[0024] a first driving member capable of driving the first ejection rod to slide along the axis thereof, so that the part of the sprue inside the one-way main runner is separated from the male core.

[0025] As preferred, a ejection through hole is arranged on the male core along a direction parallel to the opening direction of the product, and the ejection through hole is capable of communicating with the first injection runner;

[0026] The ejection device further comprises a center ejection mechanism, which comprises:

[0027] a center ejection rod slidingly arranged inside the ejection through hole; and

[0028] a center driving member capable of driving the center ejection rod to slide along the axis of the ejection through hole, and the center ejection rod is capable of ejecting the waste inside the ejection through hole.

[0029] As preferred, an end of the center ejection rod close to the female core is provided with an embedding block capable of embedding the waste inside the ejection through hole.

[0030] Advantages of the present application:

[0031] The bicolour mould of the present application, by setting a latent runner in the middle section of a first runner, when the material head inside the first runner needs to be ejected after once injection moulding, the material head breaks at the position corresponding to the latent runner, namely the part of the material head upstream of the latent runner and the part of the material head inside the latent runner are ejected first, while the part of the material head downstream of the latent runner remains inside the first runner, supporting the outlet end of the first runner into the first cavity, so that the outlet end of the first runner is no longer suspended, so that the outlet end of the first runner is not easily pierced by the high temperature and high pressure generated by the secondary injection moulding, finally preventing the fluid of the secondary injection from flowing back into the first runner, namely meeting the requirement of the thickness of the product, and improving the stability in the mould production process. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the top view of the male die core in the background art of the present application;

[0033] Figure 2 is the sectional view in A-A direction of Figure 1

[0034] Figure 3 is the enlarged view of B in Figure 2

[0035] Figure 4 is the structural schematic view of the male die core and the first female die core of the present application in the joint state;

[0036] Figure 5 is the exploded view of the male die core and the first female die core of the present application;

[0037] Figure 6 is the top view of the male die core of the present application;

[0038] Figure 7 is the sectional view in C-C direction of Figure 6

[0039] Figure 8 is the sectional view in D-D direction of Figure 6

[0040] Figure 9 is the structural schematic view of the central ejector rod of the present application.

[0041] In the drawings:

[0042] ​​​​100, bottom layer; 200, surface layer; 1, male core; 11, first cavity; 12, first runner; 121, first main runner; 122, latent runner; 123, first sub-runner; 1231, latent first sub-runner; 1232, surface first sub-runner; 1233, glue feeding first sub-runner; 124, middle runner; 13, second runner; 131, second main runner; 132, second sub-runner; 14, ejection hole; 2, female core; 21, second cavity; 22, first glue feeding runner; 23, avoiding runner; 3, center ejection mechanism; 31, center ejection rod; 311, insert block. DETAILED DESCRIPTION

[0043] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of clarity, only those structures directly related to the application are shown in the drawings.

[0044] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] In the description of the present embodiment, the terms "upper", "lower", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] The application will be described below Figures 1 to 3 , and with reference to Figures 4 to 9 The two-color mold provided by the application will be described.

[0048] With reference to Figures 4 to 6 , the two-color mold comprises a male mold, a female mold, a first mold plate and a second mold plate, the male mold is connected to the first mold plate, two female molds are arranged on the second mold plate, the first mold plate can drive the male mold to rotate so that the male mold can correspond to the two female molds respectively, and the second mold plate can drive the two female molds to slide so that the two female molds are selectively combined with the male mold to form a first molding cavity for one-time molding and a second molding cavity for two-time molding.

[0049] Specifically, the male mold is provided with a male mold core 1, and the two female molds are respectively provided with a first female mold core 2 and a second female mold core. The male mold core 1 is provided with a first cavity 11, a first jet channel 12 and a second jet channel 13, the first female mold core 2 is provided with a second cavity 21, a first glue inlet channel 22 and an avoiding channel 23, and the second female mold core is provided with a third cavity and a second glue inlet channel.

[0050] When the male mold core 1 is combined with the first female mold core 2, the first cavity 11 and the second cavity 21 cooperatively form a first molding cavity for one-time molding, the first glue inlet channel 22 and the first molding cavity are communicated through the first jet channel 12, two groups of the first cavities 11 are arranged in parallel in the embodiment, and the number of each group is two, one second cavity 21 is arranged corresponding to each first cavity 11 in the embodiment, and one third cavity is arranged corresponding to each first cavity 11 in the embodiment. When the male mold core 1 is combined with the first female mold core 2, a single first cavity 11 and a single second cavity 21 cooperatively form a single first molding cavity for one-time molding, when the male mold core 1 is combined with the second female mold core, a single first cavity 11 and a single third cavity cooperatively form a single second molding cavity for two-time molding, and the second glue inlet channel and the second molding cavity are communicated through the second jet channel 13, that is, the two-color mold in the embodiment has four first molding cavities and four second molding cavities, and four products can be produced at a time.

[0051] Further, the first mold plate in the embodiment is circularly arranged, the first mold plate rotates along the axial direction thereof, the rotation of the first mold plate is driven by any one of the components capable of driving components to rotate in the prior art, such as a motor, a rotary air cylinder and the like, the specific structure is the prior art, and will not be described here. The two male mold cores 1 in the embodiment are centrally and symmetrically arranged on the first mold plate, and the two male mold cores 1 correspond to the first female mold core 2 and the second female mold core respectively, when the first mold plate drives the two male mold cores 1 to rotate by 180 degrees, the positions of the two male mold cores 1 can be exchanged to abut against the first female mold core 2 and the second female mold core. In other embodiments, a single male mold core 1 can be used in combination with the first female mold core 2 and the second female mold core.

[0052] Exemplarily, the second template in the embodiment slides along an axis parallel to the first template, the sliding direction of the second template being the opening direction of the product, and the sliding of the second template is driven by any component capable of driving linear sliding of the component in the prior art, such as a pneumatic cylinder, an oil cylinder, etc.

[0053] Referring to Figures 5 to 8 A middle section of the first runner 12 is provided with a latent runner 122, so that when the material head inside the first runner 12 is ejected after the first molding, the material head corresponding to the position of the latent runner 122 can be broken, and the part of the material head downstream of the latent runner 122 remains inside the first runner 12. Specifically, in addition to the latent runner 122, the first runner 12 includes a first main runner 121 and a first sub-runner 123. The first main runner 121 is opened on the surface of the public mold core 1, and the first main runner 121 is provided with two first main runners 121 between the two groups of first cavities 11 along the length direction thereof. The surface of the public mold core 1 is also provided with an intermediate runner 124, which is provided with two intermediate runners 124 at the ends of the two first main runners 121 away from each other, and the intermediate runner 124 is perpendicular to the first main runner 121. The avoidance runner 23 is provided with one avoidance runner 23 corresponding to the position of each first main runner 121, first sub-runner 123 and intermediate runner 124.

[0054] Further, the inlet end of the latent runner 122 is communicated with the intermediate runner 124, the outlet end of the latent runner 122 is communicated with the first sub-runner 123, and the outlet end of the latent runner 122 extends to the inside of the public mold core 1. Specifically, the angle between the extension direction of the latent runner 122 and the surface of the public mold core 1 is 30 degrees or 45 degrees, and in the embodiment, 45 degrees is taken as an example to facilitate demolding of the material head inside the latent runner 122.

[0055] In addition, the first sub-runner 123 is provided with one first sub-runner 123 corresponding to each first cavity 11. Each first sub-runner 123 includes a latent first sub-runner 1231, a surface first sub-runner 1232 and a glue feeding first sub-runner 1233 which are communicated with each other. The latent first sub-runner 1231 is opened along the surface of the public mold core 1, and the latent first sub-runner 1231 is circularly arranged, i.e. the axis of the latent first sub-runner 1231 is parallel to the opening direction of the product, and the outlet end of the latent runner 122 is communicated with the latent first sub-runner 1231. The surface first sub-runner 1232 is opened on the surface of the public mold core 1, and the surface first sub-runner 1232 is parallel to the first main runner 121. The glue feeding first sub-runner 1233 is communicated with the surface first sub-runner 1232 and the first cavity 11, and the glue feeding first sub-runner 1233 is a horn runner.

[0056] Based on the above, since the axis of the latent one-shot runner 1231 is perpendicular to the surface of the male core 1, the part of the sprue inside the latent one-shot runner 123 can only be ejected in the direction of the axis of the latent one-shot runner 1231, that is, the part of the sprue inside the latent one-shot runner 123 is ejected in the direction perpendicular to the surface of the male core 1, and the part of the sprue inside the latent runner 122 can only be ejected in the extension direction of the latent runner 122, so that the ejection directions of the two parts of the sprue are crossed.

[0057] Therefore, when the bottom layer 100 of the product is once injection molded, the position of the sprue corresponding to the latent runner 122 can be broken when the sprue inside the one-shot runner 12 needs to be ejected, and the part of the sprue inside the one-shot runner 123 remains inside the one-shot runner 12. The part of the sprue inside the one-shot runner 123 supports the outlet end of the one-shot runner 123, so that the high temperature and high pressure generated during the secondary injection molding is not easy to penetrate the outlet end of the one-shot runner 12, and finally prevents the secondary injection fluid from flowing back into the one-shot runner 123, which not only meets the requirement of the thickness of the product, but also improves the stability of the mold production process.

[0058] In addition, the cross-sectional area of the latent runner 122 gradually decreases from the inlet end to the outlet end, and the cross-sectional area refers to the area of the cross section of the latent runner 122 perpendicular to the extension direction thereof, so that the cross-sectional area of the outlet end of the latent runner 122 is the smallest, that is, the cross-sectional area of the position of the sprue corresponding to the outlet end of the latent runner 122 is the smallest, and the strength of the position of the sprue corresponding to the outlet end of the latent runner 122 is the lowest, so that the part of the sprue inside the latent runner 122 is most likely to be broken, and the part of the sprue inside the latent runner 122 is also convenient for demolding.

[0059] Based on the above, it should be noted that the position of the sprue corresponding to the latent runner 122 can be broken by changing the extension direction of the latent runner 122 alone, so that the part of the sprue inside the one-shot runner 123 remains inside the one-shot runner 12. By separately setting the shape of the latent runner 122, that is, the cross-sectional area of the channel of the latent runner 122 gradually decreases from the inlet end to the outlet end, the position of the sprue corresponding to the latent runner 122 can also be broken by reducing the local strength of the sprue, so that the above two methods can be used alone or combined, and no specific limitation is made.

[0060] In addition, the cross-sectional area of the latent one-shot runner 1231 perpendicular to the axis thereof is greater than the cross-sectional area of the outlet end of the latent runner 122, so that the latent runner 122 itself can limit the position of the sprue inside the one-shot runner 123, and further facilitate the breaking of the position of the sprue corresponding to the outlet end of the latent runner 122.

[0061] Further, the two-shot runner 13 comprises two-shot main runners 131 and two-shot sub-runners 132. The two-shot main runners 131 are arranged on the surface of the male mold core 1, and are located between the two one-shot main runners 121. The two-shot main runners 131 and the one-shot main runners 121 are not in communication with each other, and are staggered. In the embodiment, the length direction of the two-shot main runners 131 is perpendicular to the length direction of the one-shot main runners 121, and the two-shot main runners 131 are arranged along the length direction of the two-shot main runners 131. The inlet end of the first glue inlet runner 22 and the inlet end of the second glue inlet runner are arranged at the intersection of the extension line of the length direction of the two-shot main runners 131 and the extension line of the length direction of the one-shot main runners 121, thereby reducing the structural difference between the first female mold core 2 and the second female mold core, and facilitating the machining of the first female mold core 2 and the second female mold core.

[0062] Each of the two-shot main runners 131 is in communication with two two-shot sub-runners 132. The two-shot sub-runners 132 are arranged inside the male mold core 1, and are horn runners. Each of the two-shot sub-runners 132 corresponds to one of the second molding cavities.

[0063] The two-color mold further comprises an ejection device. The ejection device comprises a first ejection mechanism, a second ejection mechanism, a third ejection mechanism, and a center ejection mechanism 3. The first ejection mechanism is configured to eject the part of the material head inside the one-shot main runner 121. The second ejection mechanism is configured to eject the part of the material head inside the one-shot sub-runner 123. The third ejection mechanism is configured to eject the waste inside the two-shot runner 13. The center ejection mechanism 3 is configured to cooperate with the first ejection mechanism to eject the part of the material head inside the one-shot main runner 121, and to cooperate with the third ejection mechanism to eject the waste inside the two-shot runner 13.

[0064] Specifically, the first ejection mechanism comprises a first ejection rod and a first driving member. The first ejection rod is arranged to slide through the male mold core 1. The axis of the first ejection rod is parallel to the mold opening direction of the product. The end of the first ejection rod extends into the one-shot main runner 121. In the embodiment, the first ejection rod corresponds to each one-shot main runner 121. The end of the first ejection rod is located at the communication position between the one-shot main runner 121 and the intermediate runner 124.

[0065] Further, the first driving member can drive the first ejection rod to slide along the axial direction, so that the material head located in the part inside the injection main runner 121 is separated from the male core 1. The first driving member is any member capable of driving the component to move linearly in the prior art, such as a cylinder, an oil cylinder, etc. In the embodiment, the first driving member is provided with one for each first ejection rod, so as to drive each first ejection rod to slide individually. Alternatively, in other embodiments, all the first ejection rods can be driven to slide synchronously by a single first driving member. After the product is injection molded once, the first ejection rod is driven to slide by the first driving member, so that the material head located in the part inside the injection main runner 121 and the part inside the latent runner 122 is separated from the male core 1.

[0066] It should be noted that the structures of the second ejection mechanism and the third ejection mechanism are similar to that of the first ejection mechanism, and the difference lies in that the positions of the ejection rods in the second ejection mechanism and the third ejection mechanism are adjusted adaptively according to different ejection objects, so that the second ejection mechanism ejects the material head located in the part inside the injection sub-runner 123, and the third ejection mechanism ejects the waste located in the part inside the two-shot runner 13. The specific structure will not be described again.

[0067] Referring to Figures 4 to 9 Further, the male core 1 is provided with an ejection through hole 14 along the parting direction of the product, and the ejection through hole 14 can be connected to the first glue inlet runner 22 and the second glue inlet runner respectively. That is, when the male core 1 is combined with the first female core 2, the ejection through hole 14 is connected to the first glue inlet runner 22, and when the male core 1 is combined with the second female core, the ejection through hole 14 is connected to the second glue inlet runner.

[0068] Specifically, the center ejection mechanism 3 comprises a center ejection rod 31 and a center driving member. The center ejection rod 31 slides through the inside of the ejection through hole 14, and the first ejection rod is provided with an embedded block 311 at the end close to the female core. The embedded block 311 is provided in a zigzag shape, and in the process of one-time injection molding, the fluid of one-time injection molding flows to the inside of the ejection through hole 14 through the first glue inlet runner 22. After the fluid in the inside of the ejection through hole 14 solidifies, waste is formed, and the embedded block 311 in a zigzag shape is embedded in the waste in the inside of the ejection through hole 14, so as to increase the contact area between the end of the center ejection rod 31 and the material head, make the connection between the two more reliable, and facilitate the movement of the waste by the center ejection rod 31. The center driving member can drive the center ejection rod 31 to slide along the axial direction of the ejection through hole 14. The center driving member is any member capable of driving the component to move linearly in the prior art, such as a cylinder, an oil cylinder, etc.

[0069] Based on the above, when the product is once injection molded, the center driving member drives the center ejection rod 31 to slide, so that the center ejection rod 31 pushes the waste inside the ejection hole 14 to move away from the male die core 1, and the first ejection rod and the center ejection rod 31 slide synchronously, so that the waste inside the ejection hole 14 and the material head are located in the part formed inside the one-shot main runner 121, the intermediate runner 124 and the latent runner 122, and finally the waste and the material head are separated from the male die core 1, improving the efficiency of the material head ejection. When the product is twice injection molded, the center driving member drives the center ejection rod 31 to slide, so that the center ejection rod 31 pushes the waste inside the ejection hole 14 to move away from the male die core 1, and the third ejection mechanism cooperates with the center ejection rod 31 to work synchronously, so that the waste formed in the second glue inlet runner, the ejection hole 14 and the two-shot runner 13 are separated from the male die core 1. At the same time, the second ejection mechanism ejects the part of the material head located in the one-shot branch runner 123.

[0070] It should be noted that the ejection device further comprises a product ejection mechanism, which is used to eject the product after twice injection molding. The structure of the product ejection mechanism is similar to that of the first ejection mechanism, and the difference lies in that the position of the ejection rod in the product ejection mechanism is adjusted adaptively according to the position and number of the product, so that the product ejection mechanism ejects the product. The specific structure is not described again.

[0071] The implementation process of the double-color mold provided by the application is as follows:

[0072] The two male die cores 1 on the first mold plate correspond to the first female die core 2 and the second female die core respectively. The second mold plate drives the first female die core 2 and the second female die core to slide for the first time, so that one of the male die cores 1 engages the first female die core 2. The first cavity 11 and the second cavity 21 cooperate to form a first molding cavity for once molding. At this time, the inside of the one-shot runner 12 is injection molded through the first glue inlet runner 22, so that the fluid fills the first molding cavity. When the bottom layer 100 of the product is injection molded, the center ejection mechanism 3 and the first ejection mechanism eject the material head inside the one-shot runner 12. The material head breaks at the position corresponding to the connection between the latent runner 122 and the one-shot branch runner 123, so that the part of the material head inside the one-shot branch runner 123 remains in the one-shot branch runner 123, supporting the molded bottom layer 100. In this process, the other male die core 1 engages the second female die core for twice injection molding.

[0073] Then the second mold plate drives the first female mold core 2 and the second female mold core to move away from the sliding direction of the first mold plate, and then the first mold plate drives the two male mold cores 1 to rotate 180 degrees, so that the two male mold cores 1 are exchanged. The second mold plate drives the first female mold core 2 and the second female mold core to slide again, so that one of the male mold cores 1 engages with the second female mold core, and the first cavity 11 and the third cavity cooperate to form a second molding cavity for secondary molding. At this time, the inside of the two jet flow channels 13 is injected through the second glue inlet flow channel, so that the fluid fills the second molding cavity. After the product is secondary injected, the part inside the one jet flow channel 123 is ejected by the second ejection mechanism, the center ejection mechanism 3 and the third ejection mechanism integrally eject the waste formed inside the second glue inlet flow channel and the two jet flow channels 13, the product ejection mechanism ejects the product, so as to complete the injection molding production of the product. In this process, the other male mold core 1 engages with the first female mold core 2, and one-time injection is performed again, so as to realize the cyclic production.

[0074] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A two-color mold, comprising a male mold and a female mold, wherein the male mold is provided with a male mold core (1) and a jet channel (12) is provided on the male mold core (1); and two female molds are provided, wherein a first female mold core (2) and a second female mold core are respectively provided on the two female molds; one of the two female molds can be selectively molded with the male mold to form a first molding cavity for one-time molding and a second molding cavity for two-time molding; Its features are, The middle section of the jet channel (12) is provided with a submerged channel (122) so that when the material head is ejected from the inside of the jet channel (12) after one molding, the position of the material head corresponding to the submerged channel (122) can be broken, so that the part of the material head downstream of the submerged channel (122) remains inside the jet channel (12).

2. The two-color mold according to claim 1, characterized in that, The jet channel (12) includes: A main injection channel (121) is disposed on the surface of the male mold core (1). The main injection channel (121) is located upstream of the submerged flow channel (122) and communicates with the inlet end of the submerged flow channel (122). The outlet end of the submerged flow channel (122) extends into the interior of the male mold core (1). A jet diverter channel (123) is located downstream of the submerged channel (122). The jet diverter channel (123) connects the outlet end of the submerged channel (122) and the first forming cavity. The part of the material head inside the jet diverter channel (123) and the part of the material head inside the submerged channel (122) have their ejection directions intersecting, so that when the material head is ejected, the connection between the submerged channel (122) and the jet diverter channel (123) can be broken, so that the part of the material head inside the jet diverter channel (123) remains inside the jet diverter channel (12).

3. The two-color mold according to claim 1 or 2, characterized in that, From the inlet end to the outlet end of the submerged flow channel (122), the cross-sectional area of ​​the submerged flow channel (122) gradually decreases.

4. The two-color mold according to claim 2, characterized in that, The single-shot flow channel (123) includes: A hidden injection manifold (1231) is provided inside the male mold core (1). The hidden injection manifold (1231) is provided along the mold opening direction of the product. The hidden injection manifold (1231) is connected to the outlet end of the hidden manifold (122). A surface injection manifold (1232) is disposed on the surface of the male mold core (1) and is connected to the outlet end of the submerged injection manifold (1231); and The injection manifold (1233) is located inside the male mold core (1) and connects the surface injection manifold (1232) and the first molding cavity.

5. The two-color mold according to claim 2, characterized in that, The first molding cavity is provided with multiple, and the injection diversion channel (123) is provided for each of the first molding cavities. The injection main channel (121) is connected to the latent channel (122) through the intermediate channel (124).

6. The two-color mold according to claim 2, characterized in that, The two-color mold also includes an ejection device configured to eject the portion of the sprue located inside the main injection channel (121) and the portion of the sprue remaining inside the injection sub-channel (123).

7. The two-color mold according to claim 6, characterized in that, The ejection device includes: A first ejection mechanism, configured to eject the portion of the feed head located inside the main injection channel (121); and A second ejection mechanism is configured to eject the portion of the feed head remaining inside the injection channel (123).

8. The two-color mold according to claim 7, characterized in that, The first ejection mechanism includes: A first ejector pin, which slides through the male mold core (1), has its axis parallel to the mold opening direction of the product, and its end extends into the interior of the injection runner (121); and A first driving member is capable of driving the first ejector rod to slide along its axial direction, causing the portion of the sprue located inside the injection channel (121) to disengage from the male mold core (1).

9. The two-color mold according to claim 7, characterized in that, The male mold core (1) is provided with an ejector through hole (14) along the mold opening direction parallel to the product, and the ejector through hole (14) can be connected to the first glue inlet channel (22); The ejection device further includes a central ejection mechanism (3), which comprises: A central ejector rod (31) is slidably inserted inside the ejector through-hole (14); and A central drive member is provided, which can drive the central ejector rod (31) to slide along the axial direction of the ejector through hole (14), and the central ejector rod (31) can eject the waste material inside the ejector through hole (14).

10. The two-color mold according to claim 9, characterized in that, The center ejector rod (31) is provided with an insert (311) at one end near the mother mold. The insert (311) can be embedded into the waste material inside the ejector through hole (14).

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