Double-color injection mold for ejecting rotary push plate

Abstract

The utility model discloses a double-color injection mold for ejecting a rotary push plate. The double-color injection mold comprises a rear mold, a fixed seat is arranged on the rear mold, a top plate is arranged above the fixed seat, a first color mold core and a second color mold core are arranged on the fixed seat, a product limiting piece is arranged on the top plate, and the product limiting piece is movably connected with the first color mold core and the second color mold core respectively; a rotatable ejector rod and a rotary driving assembly are further arranged on the rear mold, the output end of the rotary driving assembly is connected with the ejector rod, one end of the ejector rod is connected with an external driving device, and the other end of the ejector rod is connected with the ejector plate; the ejector rod can drive the ejector plate to move in the direction close to or away from the fixing base, and the rotary driving assembly can drive the ejector rod to rotate so as to drive the product limiting piece to be aligned with the first color mold core and the second color mold core correspondingly. According to the utility model, double-color forming can be completed without using two sets of molds, so that the processing efficiency is improved, the problem that a product is crushed due to the fact that the mold is changed to place the first-color product is also avoided, and the quality of the processed product is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a double-color injection mold with an ejector rotary push plate. Background Art

[0002] Injection molds are the most common tools used to mold plastic products. They are usually used in conjunction with injection molding machines. Liquid rubber is poured into the injection mold by the injection molding machine, and then cooled and molded in the injection mold to obtain a plastic product of a preset shape. Two-color injection molding refers to the molding process of injecting two different materials into the same set of molds, so that the molded parts are formed by two materials. Some of the two materials are different colors, and some are different in hardness and softness, thereby improving the aesthetics and assembly performance of the product.

[0003] Figure 1 A two-color plastic product is shown, which includes two materials, a first color product S1 and a second color product S2, wherein: the first color product S1 is made of PP material, and the second color product S2 is made of soft TPE material. In the prior art, when producing such products, the method of injection molding is usually used, that is, the first color product S1 is produced using a first set of molds, and then the first color product S1 is placed in a second set of molds for injection molding of the second color product S2, and finally a complete plastic product is injection molded. This processing method not only has a relatively low production efficiency, but also in the process of placing the first color product S1 in the second set of molds, it is easy to cause poor processing due to improper placement, and there is even a risk of the mold being crushed. Utility Model Content

[0004] In order to solve some or all of the problems existing in the above-mentioned prior art, the utility model provides a two-color injection mold with an ejector rotating push plate, including a rear mold, a fixed seat is provided on the rear mold, a top plate is provided above the fixed seat, a mold guide column, a first color core and a second color core are provided on the fixed seat, the first color core is used to form a first color product, and the second color core is used to form a second color product, one end of the mold guide column can pass through the top plate, and product limiters are respectively provided at positions corresponding to the first color core and the second color core on the top plate, The product limiter is movably connected to the first color core and the second color core respectively; the rear mold is also provided with a rotatable ejector rod and a rotation drive assembly, the output end of the rotation drive assembly is connected to the ejector rod, one end of the ejector rod is connected to an external drive device, and the other end is connected to the ejector plate; the ejector rod can drive the ejector plate to move toward or away from the fixed seat, thereby making the ejector plate plugged into or separated from the mold guide column; the rotation drive assembly can drive the ejector rod to rotate, thereby driving the product limiter to align with the first color core and the second color core respectively.

[0005] As a further improvement of the present invention, the rotary drive assembly includes a driving cylinder, which is connected to the fixed seat. A rack is provided on the output end of the driving cylinder. A gear is sleeved on the push rod, and the gear and the push rod are slidably limitedly connected, and the rack is meshingly connected to the gear.

[0006] As a further improvement of the utility model, a plurality of axial key grooves are provided on the outer side wall of the push rod, a limiting sleeve is provided on the outer side of the push rod, the gear is connected to the limiting sleeve, and the limiting sleeve is slidably engaged with the axial key grooves.

[0007] As a further improvement of the present invention, a demoulding mechanism is provided at a position on the rear mold corresponding to the second color core, and the demoulding mechanism is connected to the second color core and is used to eject the product from the second color core.

[0008] As a further improvement of the utility model, the demolding mechanism includes a pin plate, which is slidably and limitably connected to the fixed seat, and a plurality of demolding pins are arranged on the pin plate, and the demolding pins extend into the second color core. A demolding cylinder is arranged on the fixed seat, and the output end of the demolding cylinder is connected to the pin plate, and the demolding cylinder can drive the demolding pins to extend into or out of the second color core.

[0009] As a further improvement of the utility model, a plurality of demoulding guide rods are provided on the ejector plate, and the demoulding guide rods respectively pass through the ejector plate and are slidably connected to the ejector plate.

[0010] As a further improvement of the present invention, the number of the first color core and the number of the second color core are two respectively.

[0011] As a further improvement of the utility model, there are four mold closing guide pins, and the four mold closing guide pins are respectively distributed at four corners of the upper end surface of the fixing base.

[0012] As a further improvement of the utility model, a plurality of mold closing guide blocks are provided on the upper end surface of the fixing seat, and the mold closing guide blocks are respectively slidably connected to the top plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model can realize conveying and placing the first color product into the second color core through the cooperation of the ejector rod, the rotary drive assembly and the ejector plate, so as to mold the second color product on the first color product and complete the molding process of the entire plastic product; there is no need to use two sets of molds, and the two-color molding can be completed by opening and closing the mold once, thereby improving the processing efficiency and avoiding the problem of the product being crushed due to changing the mold to place the first color product, thereby ensuring the quality of the processed product. During processing, the end of the ejector rod away from the ejector plate is fixedly connected to the ejector rod of the injection molding machine; when the mold is closed for the first time, the first color product is molded in the first color core; then the injection molding machine drives the mold to open, and then pushes the ejector rod through the ejector rod, so that the ejector rod pushes the ejector plate, the product limiter and the first color product to move away from the fixed seat until the ejector plate is separated from the mold closing guide column; then the ejector rod is driven to rotate by the rotary drive assembly, driving the ejector plate, the product limiter and the first color product to rotate synchronously until the product limiter is aligned with the second color core, and then the ejector rod is controlled to reset and pull the ejector rod to move, thereby pulling the ejector plate, the product limiter and the first color product to move in the direction close to the fixed seat until the product limiter brings the first color product into the second color core; then the injection molding machine drives the mold to close, mold the first color product in the first color core, and mold the second color product on the first color product in the second color core, completing the molding of the entire plastic product; then the injection molding machine opens the mold and takes out the molded product from the second color core. Each subsequent mold closing will form a first-color product in the first-color core, and a second-color product on the first-color product in the second-color core; thus, the processing of a two-color plastic product can be completed by opening and closing the mold once. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the structure of a plastic product processed by an embodiment of the utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the rear mold in the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the top view of the rear mold in the embodiment of the utility model;

[0019] Figure 4 yes Figure 3 Schematic diagram of the AA section structure;

[0020] Figure 5 yes Figure 2A schematic diagram of the enlarged structure of part B;

[0021] Figure 6 It is a schematic diagram of the exploded structure of the first button in the embodiment of the utility model;

[0022] Figure 7 It is a schematic diagram of the exploded structure of the second button in the embodiment of the utility model;

[0023] Figure 8 yes Figure 3 Schematic diagram of the CC cross-section structure;

[0024] Fig. 9 It is a structural schematic diagram of the rotary drive assembly in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0026] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] like Figure 1-9As shown, a two-color injection mold with an ejector rotating push plate includes a front mold and a rear mold. The front mold and the rear mold can be connected in an opening and closing manner. During processing, the front mold and the rear mold are respectively installed on an injection molding machine, and the power device of the injection molding machine can drive the front mold and the rear mold to close or separate from each other. A plurality of unhooking pullers 1 are installed on one end of the front mold close to the rear mold. The rear mold includes a fixed seat 2, which is used to fix the rear mold on the injection molding machine. A top plate 3 is provided on the fixed seat 2, and the top plate 3 and the fixed seat 2 can be movably connected and matched. Four mold closing guide pillars 4 are provided on the upper end surface of the fixed seat 2, and the mold closing guide pillars 4 pass through the top plate 3 respectively and slide with the top plate 3; the four mold closing guide pillars 4 are respectively distributed at the four corners of the upper end surface of the fixed seat 2, and guide holes are respectively provided at the corresponding positions of the mold closing guide pillars 4 on the front mold. The cooperation between the mold closing guide pillars 4 and the guide holes can position the front mold and the rear mold during mold closing, so that the front mold can be accurately and smoothly closed with the rear mold, thereby improving the stability of mold processing.

[0029] In order to further improve the stability of mold closing, four mold closing guide blocks 5 are arranged on the upper end surface of the fixed seat 2. The four mold closing guide blocks 5 are respectively distributed at the center positions of the four side walls of the upper end surface of the fixed seat 2. The height of the mold closing guide block 5 is flush with the mold closing guide column 4, or lower than the mold closing guide column 4. The end of the mold closing guide block 5 away from the fixed seat 2 is slidably connected and matched with the top plate 3. A guide groove is arranged at the position corresponding to the mold closing guide block 5 on the front mold. When the injection molding machine drives the front mold and the rear mold to close the mold, the mold closing guide column 4 will be inserted into the corresponding guide hole, and the mold closing guide block 5 will be inserted into the corresponding guide groove, so as to pre-position the front mold and the rear mold. With the continued driving of the injection molding machine, the front mold and the rear mold can be closed in sequence and accurately positioned, thereby improving the stability of mold processing.

[0030] The fixing seat 2 is also provided with two first color cores 6 and two second color cores 7. The first color core 6 is used to mold the first color product S1, and the second color core 7 is used to mold the second color product S2. During specific processing, the first color product S1 molded by the first color core 6 is placed in the second color core 7, and then the second color product S2 is molded on the first color product S1 by the second color core 7, so as to mold a complete plastic product. The first color core 6 and the second color core 7 pass through the top plate 3 respectively, and can slide with them. Product limiters 8 are respectively provided at the corresponding positions of the top plate 3 with the first color core 6 and the second color core 7. The product limiters 8 are respectively movably connected with the first color core 6 and the second color core 7, that is, the product limiters 8 can extend into or out of the first color core 6 and the second color core 7. The product limiter 8 is mainly used to bring the first color product S1 from the first color core 6 into the second color core 7, and it is necessary to ensure that the relative position of the first color product S1 and the top plate 3 is fixed, so as to ensure the quality of the product during the second color molding and ensure that the product will not be crushed.

[0031] The fixing seat 2 is also provided with an inclined top mounting plate 9, on which a plurality of inclined unhooking inclined tops 10 are provided, and the unhooking inclined tops 10 are respectively connected to the fixing seat 2 in a sliding manner, and the unhooking inclined tops 10 are respectively extended into the first color core 6. Figure 1 As shown, the first color product S1 of the plastic product is provided with a plurality of barbs S3. If the first color product S1 is demolded in the traditional way of straight up and straight down, the barbs S3 are easily broken, resulting in a defective product. The unhooking inclined top 10 is mainly used to demold the barbs S3 on the first color product S1. The rear mold is also provided with an unhooking linkage component, which is connected to the inclined top mounting plate 9. The unhooking puller 1 is detachably connected to the unhooking linkage component. The unhooking puller 1 can drive the unhooking linkage component to move, thereby pulling the top plate 3 and the inclined top mounting plate 9 to move synchronously, so that the unhooking inclined top 10 and the product limiter 8 extend out of the first color core 6 respectively.

[0032] When the injection molding machine drives the mold to open, the front mold moves away from the rear mold, driving the unhooking puller 1 to move together, and the unhooking puller 1 pulls the unhooking linkage assembly to move, and then pulls the top plate 3 and the inclined top mounting plate 9 to move synchronously, and the unhooking inclined top 10 and the product limiter 8 move together with the inclined top mounting plate 9 and the top plate 3; at this time, the first color core 6 will not move, so the unhooking inclined top 10 will push the first color product S1 out of the first color core 6, and the unhooking inclined top 10 moves in the inclined direction, and the unhooking inclined top 10 is limited in the inclined direction to have a lateral movement force, so that the barb S3 on the first color product S1 can be unhooked without loss; at the same time, the product limiter 8 also moves together, which can support the product to ensure that the positional relationship between the first color product S1 and the top plate 3 remains unchanged. When the unhooking inclined top 10 is disengaged from the barb S3 on the first color product S1, the unhooking puller 1 will automatically separate from the unhooking linkage assembly.

[0033] The two-color injection mold of the ejector rotary push plate can complete the demoulding of the upper hook S3 of the first color product S1 through the cooperation of the unhooking pulling member 1, the unhooking linkage assembly, the inclined top mounting plate 9, the unhooking inclined top 10 and the top plate 3, thereby avoiding the breaking of the shopping guide on the first color product S1, ensuring the quality of the product and improving the processing quality.

[0034] A rotatable ejector pin 11 and a rotary drive assembly are also provided on the rear mold. The output end of the rotary drive assembly is connected to the ejector pin 11, and one end of the ejector pin 11 is fixedly connected to the ejector plate 3. During operation, the end of the ejector pin 11 away from the ejector plate 3 is connected to the ejector rod of the injection molding machine. The ejector rod of the injection molding machine can drive the ejector pin 11 to extend into or out of the fixed seat 2, thereby driving the ejector plate 3 to move toward or away from the fixed seat 2, so that the ejector plate 3 is plugged in or separated from the mold guide column 4. The rotary drive assembly can drive the ejector pin 11 to rotate, thereby driving the product limiter 8 to align with the first color core 6 and the second color core 7 respectively.

[0035] During the processing, when the injection molding machine drives the mold to open, the unhooking puller 1 on the front mold pulls the unhooking inclined ejector 10 to complete the demolding of the barb S3 on the first color product S1; then the ejector rod 11 is pushed by the ejector rod of the injection molding machine, so that the ejector rod 11 pushes the ejector plate 3, the product limiter 8 and the first color product S1 to move away from the fixed seat 2 until the ejector plate 3 is separated from the mold guide column 4; then the ejector rod 11 is driven to rotate by the rotary drive assembly, driving the ejector plate 3, the product limiter 8 and the first color product S1 to rotate synchronously until the product limiter 8 is aligned with the second color core 7, and then the ejector rod is controlled to reset and the ejector rod 11 is pulled back to reset, thereby pulling the ejector plate 3 , the product limiter 8 and the first color product S1 move toward the direction close to the fixed seat 2, until the product limiter 8 brings the first color product S1 into the second color core 7; at this time, the top plate 3 is also reset to the initial state, and is inserted and limited with the mold guide pin 4; then the injection molding machine drives the mold to close the mold, inject the first color rubber into the first color core 6 and mold the first color product S1 in the first color core 6, and at the same time inject the second color rubber into the second color core 7 and mold the second color product S2 on the first color product S1 in the second color core 7, completing the molding of the entire plastic product; then the injection molding machine opens the mold and takes out the molded product from the second color core 7. Then repeat the above process, and each subsequent mold closing will mold the first color product S1 in the first color core 6, and mold the second color product S2 on the first color product S1 in the second color core 7; so that the processing process of a two-color plastic product can be completed by opening and closing the mold once.

[0036] The two-color injection mold with an ejector rotary push plate can transport and place the first-color product S1 into the second-color core 7 through the cooperation of the ejector rod 11, the rotary drive assembly and the ejector plate 3, so as to mold the second-color product S2 on the first-color product S1 and complete the molding process of the entire plastic product. There is no need to use two sets of molds, and the two-color molding can be completed by opening and closing the mold once, which improves the processing efficiency and avoids the problem of the product being crushed due to changing the mold to place the first-color product S1, thereby ensuring the quality of the processed products.

[0037] like Figure 2 As shown, the unhooking linkage assembly includes a first latch 12 and a second latch 13. The first latch 12 is mounted on the top plate 3 and is detachably connected to the unhooking puller 1. The second latch 13 is respectively connected to the top plate 3 and the inclined top mounting plate 9. In the process of demoulding the first color product S1, the unhooking puller 1 pulls the top plate 3 and the second latch 13 through the first latch 12, and then pulls the inclined top mounting plate 9 and the unhooking inclined top 10 through the second latch 13. The unhooking inclined top 10 moves obliquely due to its tilting direction, thereby pushing out the barb on the first color product S1, and completing the demoulding of the barb S3.

[0038] In this embodiment, there are four first hooks 12, and the four first hooks 12 are distributed in a rectangular shape on the two sides of the top plate 3; there are four second hooks 13, and the four second hooks 13 are symmetrically distributed in pairs on the left and right sides of the rear mold. In other embodiments, the number of the first hooks 12 and the second hooks 13 can also be any other number, as long as it is ensured that the top plate 3 and the inclined top mounting plate 9 can be stably pulled up.

[0039] like Figure 5 , 6 As shown, specifically, the first hooking machine 12 includes a pull ring 121, which is limitedly installed on the top plate 3 through a cover plate 122, and the pull ring 121 can slide horizontally on the top plate 3. The end of the unhooking puller 1 away from the front mold is provided with a first hook 101, and the first hook 101 can pass through the pull ring 121 and can be engaged with the pull ring 121. In the mold closing state, the first hook 101 passes through the pull ring 121; when the mold is opened, the unhooking puller 1 moves with the front mold, and when the first hook 101 abuts against the pull ring 121, it will pull the top plate 3 to move together, thereby realizing the process of demolding the barb S3 of the first color product S1.

[0040] In order to enable the first hook 101 to disengage from the pulling ring 121, a first control rod 123 is installed on the fixing seat 2, and a first elastic member 124 is provided on the top plate 3. The first elastic member 124 abuts against the pulling ring 121 to drive the pulling ring 121 to slide in the direction of the first elastic member 124. One end of the pulling ring 121 away from the first elastic member 124 abuts against the first control rod 123, and a first push block 125 is provided on the side wall of the first control rod 123 close to the pulling ring 121. The first push block 125 can push the pulling ring 121 to move in the direction close to the first elastic member 124, thereby disengaging the pulling ring 121 from the first hook 101. In the mold closing state, the first hook 101 passes through the pulling ring 121, and the first control rod 123 abuts against one end of the pulling ring 121 away from the first elastic member 124; when the mold is opened, the injection molding machine drives the front mold to move in the direction away from the rear mold, pulling the unhooking pulling member 1 to move in the direction away from the rear mold, and the unhooking pulling member 1 will slide on the pulling ring 121. When the first hook 101 abuts against the pulling ring 121, it will pull the pulling ring 121 and the top plate 3 together to move in the direction away from the rear mold, thereby pulling the second buckle machine 13 and the inclined top mounting plate 9 to move, and the first color product S1 in the first color core 6 is unhooked by the unhooking inclined top 10. During this process, the pulling ring 121 and the first control rod 123 are slidably matched; when the unhooking inclined ejector 10 completes the demolding of the hook S3 on the first color product S1, the pulling ring 121 also moves to a position opposite to the first push block 125. As the injection molding machine continues to drive the front mold to move away from the rear mold, the first push block 125 will push the pulling ring 121 to slide laterally on the top plate 3 toward the first elastic member 124, thereby compressing the first elastic member 124, so that the pulling ring 121 is disengaged from the first hook 101. As the front mold continues to move, the unhooking pulling member 1 will pass through the pulling ring 121, so that the front mold will no longer continue to pull the top plate 3 to move. When the injection molding machine drives the mold to close, the front mold moves toward the rear mold, thereby driving the unhooking puller 1 to move toward the rear mold. As the front mold continues to move, the unhooking puller 1 will pass through the pull ring 121, and the first hook 101 squeezes the pull ring 121, thereby compressing the first elastic member 124; after the first hook 101 passes through the pull ring 121, the elastic force of the first elastic member 124 will push the pull ring 121 to move away from the first elastic member 124, so that the first hook 101 and the pull ring 121 are engaged and limited, so as to facilitate the demolding of the barb S3 on the first color product S1 when the mold is opened next time.

[0041] like Figure 7As shown, the second locking machine 13 includes a locking machine pull rod 131 and a pulling block 132. One end of the locking machine pull rod 131 is fixedly connected to the inclined top mounting plate 9, and the other end is provided with a second hook 133. The second hook 133 is detachably connected to the pulling block 132. The pulling block 132 is installed on the top plate 3 and is movably limited and connected to the top plate 3. In the mold closing state, the second hook 133 is connected to the pulling block 132; so when the mold is opened, when the first locking machine 12 pulls the top plate 3 to move away from the fixed seat 2, the top plate 3 will synchronously drive the pulling block 132 to move, thereby pulling the locking machine pull rod 131 and the inclined top mounting plate 9 to move, and the inclined top mounting plate 9 drives the unhooking inclined top 10 to move obliquely. The barb S3 on the first color product S1 is demolded through the oblique movement of the unhooking inclined top 10, realizing a non-destructive unhooking process.

[0042] In order to enable the second hook 133 to disengage from the pulling block 132, a second control rod 134 is provided on the fixed seat 2, and a second elastic member 135 is provided on the top plate 3. The second elastic member 135 abuts against the pulling block 132 to drive the pulling block 132 to slide in a direction away from the second elastic member 135. A second push block 136 is provided on the side wall of the second control rod 134 close to the pulling block 132. The second push block 136 can abut against the pulling block 132 and push the pulling block 132 to move in a direction close to the second elastic member 135, thereby disengaging the pulling block 132 from the second hook 133. When the pulling block 132 pulls the inclined top mounting plate 9 to move through the second hook 133, the trigger rod 131 will slide on the second control rod 134; when the unhooking inclined top 10 completes the demolding of the hook S3 on the first color product S1, the top plate 3 also drives the pulling block 132 to move to the position corresponding to the second push block 136. As the top plate 3 continues to be pulled, the second push block 136 will push the pulling block 132 to move in the direction close to the second elastic member 135 and compress the second elastic member 135, so that the pulling block 132 is disengaged from the second hook 133, thereby preventing the pulling block 132 from continuing to pull the inclined top mounting plate 9 to move. During resetting, the ejector rod 11 is pulled by the ejector rod of the injection molding machine, thereby driving the ejector plate 3 to move toward the fixed seat 2, so that the pulling block 132 is separated from the second pushing block 136; as the ejector plate 3 continues to be pulled, the pulling block 132 will be aligned with the second hook 133, and the second hook 133 squeezes the pulling block 132 and compresses the second elastic member 135 until the second hook 133 passes over the pulling block 132; then, under the elastic force of the second elastic member 135, the pulling block 132 will be pushed to move away from the second elastic member 135, so that the second hook 133 is re-engaged with the pulling block 132 for subsequent processing.

[0043] like Figure 2As shown, in order to enable the unhooked lift 10 to be smoothly reset during mold closing, so that the demoulding lift can extend into the first color core 6, a lift reset oil cylinder 14 is installed on the rear mold, and the output end of the lift reset oil cylinder 14 is slidably limitedly connected to the lift mounting plate 9, and the lift reset oil cylinder 14 can drive the lift mounting plate 9 to move away from the top plate 3. In specific operation, in the initial state, the lift reset oil cylinder 14 is in an extended state, and when the top plate 3 moves by pulling the lift mounting plate 9 through the second hook machine 13, the lift mounting plate 9 will slide on the output end of the lift reset oil cylinder 14; when the unhooked lift 10 demoulds the first color product S1 in the first color core 6 with a hook, the second push block 136 also pushes the second hook 133 to disengage from the pulling block 132, and at this time, the lift mounting plate 9 just moves to abut against the output end of the lift reset oil cylinder 14. Before the second mold closing, the tilted top reset cylinder 14 is controlled to work so that it contracts, thereby pulling the tilted top mounting plate 9 to move away from the top plate 3, thereby pulling the unhooking tilted top 10 to move obliquely, so that the unhooking tilted top 10 is retracted into the first color core 6 for subsequent processing; when the unhooking tilted top 10 is reset, the tilted top reset cylinder 14 is controlled to extend for subsequent processing.

[0044] like Figure 8 , 9The rotary drive assembly includes a driving cylinder 15, which is fixedly mounted on the fixed seat 2. A rack 16 is mounted on the output end of the driving cylinder 15. Four axial key grooves 17 are evenly spaced on the outer wall of the push rod 11. In other embodiments, the number of axial key grooves 17 can also be any other number. A limiting sleeve 18 is sleeved on the outer wall of the push rod 11. The limiting sleeve 18 is slidably engaged with the axial key groove 17. A gear 19 is fixedly sleeved on the outer side of the limiting sleeve 18, and the gear 19 is meshed with the rack 16. During operation, when the hook S3 of the first color product S1 in the first color core 6 completes demolding, the first hook 101 is disengaged from the pulling ring 121, and the second hook 133 is also disengaged from the pulling block 132; then the ejector rod 11 is pushed by the ejector rod of the injection molding machine, so that the ejector rod 11 pushes the ejector plate 3, the product limiter 8 and the first color product S1 to move away from the fixed seat 2 until the ejector plate 3 is disengaged from the mold guide column 4, and at this time the limit sleeve 18 drives the gear 19 to slide axially on the axial keyway 17 on the ejector rod 11. Then the driving cylinder 15 is controlled to work, the rack 16 is driven to slide in the fixed seat 2, and the rack 16 drives the push rod 11 to rotate on the fixed seat 2, thereby driving the top plate 3, the product limiter 8 and the first color product S1 to rotate synchronously, until the product limiter 8 is aligned with the second color core 7, and then the push rod is controlled to reset and the push rod 11 is reset, thereby pulling the top plate 3, the product limiter 8 and the first color product S1 to move in the direction close to the fixed seat 2, until the product limiter 8 brings the first color product S1 into the second color core 7; thereby realizing the processing process of placing the first color product S1 into the second color core 7. After that, the injection molding machine drives the mold to close the mold, inject the second color rubber into the second color core 7, and mold the second color product S2 on the first color product S1 in the second color core 7, completing the molding of the entire plastic product.

[0045] In order to demold the finished plastic product in the second color core 7, a demolding mechanism is provided on the rear mold at a position corresponding to the second color core 7. The demolding mechanism is connected to the second color core 7 and is used to eject the molded plastic product from the second color core 7.

[0046] like Figure 2As shown, specifically, the demoulding mechanism includes an ejector plate 20, which is slidably limitedly connected to the fixed seat 2, and a plurality of demoulding ejectors 21 are arranged on the ejector plate 20, and the demoulding ejectors 21 extend into the second color core 7. The fixed seat 2 is provided with a demoulding oil cylinder 22, and the output end of the demoulding oil cylinder 22 is connected to the ejector plate 20, and the demoulding oil cylinder 22 can drive the demoulding ejectors 21 to extend into or extend out of the second color core 7. During operation, after the injection molding of the second color core 7 is completed, the injection molding machine drives the front mold and the rear mold to open the mold; after the mold is opened, the demoulding oil cylinder 22 is controlled to work, and the ejector plate 20 is driven to move, and the ejector plate 20 drives all the demoulding ejectors 21 to move in the direction of extending out of the second color core 7, so as to eject the product in the second color core 7, and then the product is taken away manually or by a robot. Afterwards, the demoulding cylinder 22 is controlled to reset, driving the ejector plate 20 to reset, thereby driving all the demoulding ejectors 21 to retract into the second color core 7 for subsequent processing.

[0047] In order to limit and guide the moving direction of the ejector plate 20, a plurality of demoulding guide rods 23 are provided on the ejector plate 20, and the demoulding guide rods 23 respectively pass through the top plate 3 and are slidably connected with the top plate 3. When the demoulding cylinder 22 is working, it can drive the ejector plate 20 to move, and the ejector plate 20 drives the demoulding guide rods 23 to slide on the top plate 3. The cooperation between the demoulding guide rods 23 and the top plate 3 can limit and guide the moving direction of the ejector plate 20, thereby ensuring that each demoulding ejector 21 can smoothly extend into or extend out of the second color core 7.

[0048] When using the above mold to process a two-color product, the two-color injection mold with a rotary ejector plate is installed on an injection molding machine, so that the front mold and the rear mold are fixedly installed on the injection molding machine, and the ejector rod 11 on the rear mold is connected and fixed to the ejector rod of the injection molding machine. Then the processing is carried out, and the specific steps of the processing are as follows:

[0049] 1. During the initial processing, the front mold and the rear mold are first driven by the injection molding machine to close the mold, so that the front mold is respectively plugged with the mold closing guide pin 4 and the mold closing guide block 5, and the end face of the front mold is in contact with the top plate 3, so that a closed cavity is formed in the first color core 6 and the second color core 7, so that the injection molding machine can inject rubber into them.

[0050] 2. Molding the first color product S1: The first color rubber is injected into the first color core 6 by the injection molding machine, and the first color product S1 is molded in the first color core 6 by cooling. At this time, the barb S3 on the first color product S1 is connected with the unhooking inclined top 10.

[0051] 3. Unhooking the first color product S1: The injection molding machine drives the front mold and the rear mold to open, drives the front mold to move away from the rear mold, pulls the first button 12 to move through the unhooking puller 1, the first button 12 pulls the top plate 3 to move, the top plate 3 pulls the second button 13 to move, and the second button 13 pulls the inclined top mounting plate 9 and the unhooking inclined top 10 to move synchronously. Among them, because the unhooking inclined top 10 is set at an angle, it moves in the inclined direction due to the limit of the fixed seat 2, so the unhooking inclined top 10 will have a lateral thrust during the movement, so that the barb S3 on the first color product S1 is disengaged from the unhooking inclined top 10, completing the unhooking operation of the first color product S1. In this process, the top plate 3 drives the product limiter 8 and the first color product S1 to move synchronously, so that the relative position of the first color product S1 and the top plate 3 will not change.

[0052] After the first color product S1 is unhooked, the unhooking puller 1 will be disengaged from the first latch 12, and the pulling block 132 on the top plate 3 will also be disengaged from the latch pull rod 131. As the injection molding machine continues to drive, the front mold will be driven away from the rear mold, thereby completing the mold opening. By pulling the top plate 3 and the first color product S1 unhooking by the front mold, it is possible to ensure that the height position of the first color product S1 and the top plate 3 remains fixed; so that when the top plate 3 is rotated later, the first color product S1 rotates synchronously with the top plate 3, ensuring that the first color product S1 can be accurately placed in the second color core 7 after rotation, facilitating the molding of the second color product S2.

[0053] 4. Push out the top plate 3: After the injection molding machine drives the mold opening, the injection molding machine drives the ejector rod to extend, thereby pushing the ejector rod 11 to move. The ejector rod 11 will push the top plate 3 to move away from the fixed seat 2, so that the top plate 3 slides on the mold guide column until the top plate 3 is separated from the mold guide column 4 and the mold guide block 5 respectively; thereby ensuring that when the top plate 3 is rotated subsequently, the mold guide column 4 and the mold guide block 5 will not interfere with the rotational movement. Because the product limiter 8 is installed on the top plate 3, during this process, the movement of the top plate 3 will also drive the product limiter 8 to move synchronously. The product limiter 8 will move synchronously with the top plate 3 with the first color product S1, so that the relative position of the first color product S1 and the top plate 3 will not change.

[0054] 5. Rotational transposition: Control the driving cylinder 15 to work, drive the rack 16 to slide in the fixed seat 2, and the rack 16 will drive the top rod 11 to rotate on the fixed seat 2, thereby driving the top plate 3, the product stopper 8 and the first color product S1 to rotate synchronously, until the product stopper 8 with the first color product S1 is placed is aligned with the second color core 7. In this embodiment, the driving cylinder 15 can drive the top plate 3 to rotate 180° each time, so that the positions of the product stopper 8 aligned with the first color core 6 and the second color core 7 can be interchanged after the driving cylinder 15 completes its work.

[0055] 6. Reset the top plate 3: The injection molding machine drives the top rod to retract, pulls the top rod 11 to move, pulls the top plate 3 to move in the direction close to the fixed seat 2, and the product limiter 8 moves synchronously with the top plate 3 until the product limiter 8 extends into the second color core 7; at this time, the product limiter 8 will also place the first color product S1 at the corresponding position in the second color core 7. After the top plate 3 is reset, the mold closing guide pillar 4 and the mold closing guide block 5 will pass through the top plate 3 respectively until the top plate 3 and the fixed seat 2 are abutted and limited.

[0056] After the top plate 3 is reset, the product limiter 8 originally in the second color core 7 will also extend into the first color core 6, and then control the inclined top reset cylinder 14 to work, so that the inclined top reset cylinder 14 contracts, thereby pulling the inclined top mounting plate 9 to move away from the top plate 3, and the inclined top mounting plate 9 drives the unhooking inclined top 10 to move synchronously. The unhooking inclined top 10 is limited by the fixed seat 2 and moves obliquely until the unhooking inclined top 10 retracts into the first color core 6, so as to subsequently form the first color product S1 in the first color core 6.

[0057] 7. Molding the second color product S2: The injection molding machine drives the front mold and the rear mold to close the mold, and drives the front mold to move in the direction close to the rear mold. The front mold will be plugged with the mold closing guide pillar 4 and the mold closing guide block 5 respectively until the front mold and the top plate 3 are abutted and limited, and the mold closing is completed. Then the first color rubber is injected into the first color core 6, and the second color rubber is injected into the second color core 7; through cooling molding, a new first color product S1 will be molded in the first color core 6, and the second color product S2 will be molded on the first color product S1 in the second color core 7, thereby molding the entire plastic product.

[0058] It should be noted that each subsequent mold closing will inject the first color rubber into the first color core 6 and the second color rubber into the second color core 7; in other words, in subsequent processing, the first color product S1 and the second color product S2 can be injection molded at the same time, thereby improving processing efficiency.

[0059] 8. Product demoulding: When the first color core 6 and the second color core 7 are molded, the injection molding machine drives the front mold and the rear mold to open the mold, and drives the front mold to move away from the rear mold. In this process, the working process of the first color core 6 and the second color core 7 is different. The working process of the first color core 6 is the above-mentioned "first color product S1 debarking" step, so that the new first color product S1 completes the barb demoulding. When the mold opening is completed, in the second color core 7, the demoulding cylinder 22 is controlled to work, and the ejector plate 20 is driven to move. The ejector plate 20 drives all the demoulding ejectors 21 to move in the direction of extending out of the second color core 7, thereby ejecting the finished plastic product in the second color core 7, and then the plastic product is taken out of the second color core 7 manually or by a robot, completing the injection molding process of a plastic product. After that, the demoulding cylinder 22 is controlled to reset, and the ejector plate 20 is driven to reset, thereby driving all the demoulding ejectors 21 to retract into the second color core 7 for subsequent processing. Then the step of "pushing out the top plate" is performed, and so on, to realize the continuous injection molding process.

[0060] In the subsequent processing, the two-color injection mold with the ejector rotary push plate can complete the injection molding of a plastic product by closing and opening the mold once, without changing the mold, thereby greatly improving the processing efficiency; it can also effectively avoid the situation where the product is crushed due to mold change.

[0061] The above-mentioned specific implementation mode is a preferred implementation mode of the present utility model, and is not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation mode. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. A two-color injection mold with an ejector rotary push plate, characterized in that: The mold comprises a rear mold, a fixing seat is provided on the rear mold, a top plate is provided above the fixing seat, a mold guide column, a first color core and a second color core are provided on the fixing seat, the first color core is used to form a first color product, the second color core is used to form a second color product, one end of the mold guide column can pass through the top plate, and product stoppers are respectively provided at positions on the top plate corresponding to the first color core and the second color core, and the product stoppers are respectively movably connected to the first color core and the second color core; The rear mold is also provided with a rotatable ejector rod and a rotation drive assembly, wherein the output end of the rotation drive assembly is connected to the ejector rod, one end of the ejector rod is connected to an external drive device, and the other end is connected to the ejector plate; The ejector rod can drive the ejector plate to move toward or away from the fixing seat, thereby causing the ejector plate to be plugged into or separated from the mold guide pin; The rotary drive assembly can drive the push rod to rotate, thereby driving the product stopper to align with the first color core and the second color core respectively.

2. The double-color injection mold for ejecting a rotating push plate according to claim 1, characterized in that: The rotary drive assembly includes a driving cylinder, which is connected to the fixed seat. A rack is provided on the output end of the driving cylinder. A gear is sleeved on the push rod, and the gear is slidably limitedly connected to the push rod. The rack is meshingly connected to the gear.

3. The double-color injection mold for ejecting a rotating push plate according to claim 2, characterized in that: A plurality of axial key grooves are arranged on the outer side wall of the push rod, a limiting sleeve is arranged on the outer side of the push rod, the gear is connected with the limiting sleeve, and the limiting sleeve is slidably engaged with the axial key grooves.

4. The double-color injection mold for ejecting a rotating push plate according to claim 1, characterized in that: A demoulding mechanism is provided at a position on the rear mold corresponding to the second color core, and the demoulding mechanism is connected to the second color core and is used to eject the product from the second color core.

5. The double-color injection mold for ejecting a rotating push plate according to claim 4, characterized in that: The demoulding mechanism includes a pin plate, which is slidably and limitably connected to the fixed seat. The pin plate is provided with a plurality of demoulding pins, which extend into the second color core. The fixed seat is provided with a demoulding cylinder, and the output end of the demoulding cylinder is connected to the pin plate. The demoulding cylinder can drive the demoulding pins to extend into or out of the second color core.

6. The double-color injection mold for ejecting a rotating push plate according to claim 5, characterized in that: The ejector plate is provided with a plurality of demoulding guide rods, and the demoulding guide rods respectively pass through the ejector plate and are slidably connected with the ejector plate.

7. The two-color injection mold with an ejector rotary push plate according to any one of claims 1 to 6, characterized in that: The number of the first color core and the number of the second color core are respectively two.

8. The two-color injection mold with an ejector rotary push plate according to any one of claims 1 to 6, characterized in that: There are four mold closing guide pins, and the four mold closing guide pins are respectively distributed at four corners of the upper end surface of the fixing seat.

9. The two-color injection mold with an ejector rotary push plate according to any one of claims 1 to 6, characterized in that: A plurality of mold clamping guide blocks are arranged on the upper end surface of the fixing seat, and the mold clamping guide blocks are respectively slidably connected with the top plate.

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