Expandable injection molding machine and injection molding system

Abstract

The utility model discloses an expandable injection molding machine and an injection molding system. The injection molding machine specifically comprises a rotating table, an expanding assembly, a rotating motor, a first front mold, a second front mold, an expanding front mold, a mold rear mold and an injection molding unit, each side face of the rotating table is provided with a rear mold, and the first front mold and the second front mold are arranged on the two sides of the rotating table; the expanding assembly is connected with the rotating table, a detachable expanding front mold is mounted on the expanding assembly, and the expanding front mold is arranged on the adjacent side faces of the first front mold and the second front mold; the rotating motor is used for driving the rotating table to rotate, so that the mold rear mold is sequentially switched to mold closing positions of the first front mold, the second front mold and the expanding front mold; the injection molding unit is used for injection molding of colored materials. According to the expandable injection molding machine provided by the utility model, rapid switching between a double-color injection molding working state and a three-color injection molding working state can be realized, and different products can be subjected to injection molding only by dismounting or mounting the expansion front mold according to requirements without integrally replacing the injection molding machine.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an expandable injection molding machine and an injection molding system. Background Art

[0002] Color injection molding is a technology that adds color raw materials to the plastic injection molding process. It is mainly used in the fields of home appliances, daily plastic products, and automobile parts manufacturing, which can improve the appearance of products. The color requirements of the appearance of existing products are becoming more and more complex. With the increasing demand for multi-color product injection molding, various types of multi-color injection molding machines that can realize mold replacement during the injection molding process have emerged. In the actual production process, the orders received by the factory are constantly changing with market demand. In many cases, the color injection molding requirements for each batch of orders are completely different. For example, the first batch of orders that need to be injected require two-color injection molding products and three-color injection molding products. In this case, the factory needs to have two types of injection molding machines at the same time, one for injection molding two-color products and the other for injection molding three-color products. However, this production method has disadvantages, that is, if only three-color products need to be produced in a certain quarter, the production line for producing two-color injection molding products will not be available. At this time, if the two-color injection molding machine needs to be replaced with a three-color injection molding machine, not only the procurement time is long, it is easy to delay the construction period, and the replacement cost is high, which is extremely unfavorable for the factory's cost control. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an expandable injection molding machine, which can realize the switch between two-color product injection molding and three-color product injection molding by only one machine without replacing the entire injection molding machine.

[0004] In the first aspect, an embodiment of the utility model provides an expandable injection molding machine, comprising a rotating table, an expansion assembly, a rotating motor, a first front mold, a second front mold, an expansion front mold, a mold back mold and an injection unit; the mold back mold is arranged on each side of the rotating table, and the first front mold and the second front mold are arranged on both sides of the rotating table; the expansion assembly is connected to the rotating table, and a detachable expansion front mold is installed on the expansion assembly, and the expansion front mold is arranged on the adjacent side of the first front mold and the second front mold; the rotating motor is used to drive the rotating table to rotate, so that the mold back mold is switched to the clamping position of the first front mold, the second front mold and the expansion front mold in turn; the injection unit is used to inject colored material into the cavity after the clamping.

[0005] In some embodiments of the utility model, the injection molding machine also includes a first substrate, a second substrate and an expansion substrate, the first substrate and the second substrate are respectively arranged on both sides of the turntable, and the expansion substrate is arranged on adjacent sides of the first substrate and the second substrate; the first front mold is arranged on one end of the first substrate close to the turntable, and the second front mold is arranged on one end of the second substrate close to the turntable; the expansion substrate is detachably mounted on the expansion assembly, and the expansion front mold is arranged on one end of the expansion substrate close to the turntable.

[0006] In some embodiments of the utility model, the injection molding machine also includes a sliding block and a guide rod, the guide rod is arranged between the first substrate and the second substrate, and the sliding block sleeve is slidably arranged on the guide rod; the sliding block can slide along the guide rod between the first substrate and the second substrate; the rotating table includes a base, a rotating shaft and a rotating body, the rotating body is rotatably sleeved on the rotating shaft, and the mold back mold is arranged on the rotating body; one end of the rotating shaft is fixed on the base, and the other end of the rotating shaft is passed through the sliding block; the expansion component is installed on the sliding block.

[0007] In some embodiments of the utility model, the expansion component includes a first mounting plate, a second mounting plate, a connecting rod and a first driving device; the first mounting plate is mounted on the base, the second mounting plate is mounted on the sliding block, and the first mounting plate and the second mounting plate are connected by the connecting rod; a first guide rail is provided on the upper surface of the first mounting plate, and a second guide rail is provided on the lower surface of the second mounting plate; the lower end of the expansion substrate is slidably connected to the first guide rail, and the upper end of the expansion substrate is slidably connected to the second guide rail; the first driving device can drive the expansion substrate to move along the first guide rail and the second guide rail; the expansion substrate can be removed from the first guide rail and the second guide rail.

[0008] In some embodiments of the present invention, the injection molding machine further comprises an electronic ruler, which is disposed on the first mounting plate; a sensing end of the electronic ruler is disposed against a side of the expansion substrate away from the rotating table.

[0009] In some embodiments of the utility model, a locking mechanism is also provided on the expansion substrate; the locking mechanism includes a locking drive device, a first telescopic column and a second telescopic column; the first telescopic column is arranged on a side of the expansion substrate close to the rotating table, and the second telescopic column is arranged on a side of the expansion substrate away from the rotating table; the locking drive device is used to drive the first telescopic column and the second telescopic column to extend or retract, and the first telescopic column and the second telescopic column can prevent the expansion substrate from approaching or moving away from the rotating table when extended.

[0010] In some embodiments of the utility model, the injection unit includes a fixed injection device and an expansion injection device; the fixed injection device is used to inject the colored material into the cavity after the first front mold and the mold back mold are molded together and into the cavity after the second front mold and the mold back mold are molded together; the expansion injection device is detachably arranged on a side of the expansion substrate away from the turntable; an injection port is arranged on a side of the expansion substrate away from the turntable, and the expansion injection device injects the colored material into the cavity after the expansion front mold and the mold back mold are molded together through the injection port.

[0011] In some embodiments of the utility model, the injection molding machine also includes a second driving device; the first substrate is fixed at one end of the guide rod, and the second substrate is slidably disposed at the other end of the guide rod; the second driving device is used to drive the second substrate to move along the guide rod toward or away from the rotating table.

[0012] In a second aspect, an embodiment of the utility model provides an injection molding system, including the expandable injection molding machine described in the embodiment of the above aspect.

[0013] According to the expandable injection molding machine of the utility model, at least the following beneficial effects are achieved: the expandable injection molding machine provided by the utility model has a rotating table at the center, and fixed mold front molds are provided on both sides of the rotating table, and the mold rear mold can be switched between the mold closing positions of the first front mold and the second front mold by rotating the rotating table, so as to perform two-color injection molding; at the same time, the expansion front mold can be set on the expansion component according to the demand by adding the expansion component set on the rotating table, so that the injection molding machine can also switch the mold rear mold between the mold closing positions of the first front mold, the second front mold and the expansion front mold by rotating the rotating table, so as to perform three-color injection molding. The injection molding machine provided by the utility model has a simple installation structure, and can realize the rapid switching between the two-color injection molding working state and the three-color injection molding working state. To inject different products, it is only necessary to disassemble or install the expansion front mold according to the demand, and there is no need to replace the injection molding machine as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 It is a schematic diagram of an expandable injection molding machine provided by one embodiment of the utility model;

[0016] Figure 2 It is a structural exploded diagram of an expandable injection molding machine provided by another embodiment of the utility model;

[0017] Figure 3 is a schematic diagram of a rotating table provided in another embodiment of the utility model;

[0018] Figure 4 It is a perspective view from the side of an expandable injection molding machine provided by another embodiment of the utility model.

[0019] Figure numerals: rotating table 100, rotating body 101, rotating shaft 102, base 103, mold back mold 110, first front mold 210, second front mold 220, expansion front mold 230, first substrate 310, second substrate 320, expansion substrate 330, guide rod 410, sliding block 420, first mounting plate 430, first guide rail 431, second mounting plate 440, second guide rail 441, connecting rod 450, electronic ruler 460, first telescopic column 471, second telescopic column 472, expansion injection molding device 510. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the first, second or third, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "further embodiments", "some specific embodiments" or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] The expandable injection molding machine provided by the utility model has a rotating table at the center, and fixed mold front molds are arranged on both sides of the rotating table. The mold rear mold can be switched between the mold closing positions of the first front mold and the second front mold by rotating the rotating table to perform two-color injection molding; at the same time, the expansion front mold can be set on the expansion component according to the demand by adding the expansion component on the expansion component, so that the injection molding machine can also switch the mold rear mold between the mold closing positions of the first front mold, the second front mold and the expansion front mold by rotating the rotating table to perform three-color injection molding. The injection molding machine provided by the utility model has a simple installation structure, and can realize the rapid switching between the two-color injection molding working state and the three-color injection molding working state. To inject different products, it is only necessary to disassemble or install the expansion front mold according to the demand, and there is no need to replace the injection molding machine as a whole.

[0026] The specific structure of the embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0027] Reference Figure 1 to Figure 4 , Figure 1 The schematic diagram of the expandable injection molding machine of the embodiment of the utility model is shown in FIG. The specific structure of the expandable injection molding machine includes:

[0028] The invention comprises a rotating table 100, an expansion assembly, a rotating motor, a first front mold 210, a second front mold 220, an expansion front mold 230, a mold back mold 110 and an injection unit; a mold back mold 110 is arranged on each side of the rotating table 100, and the first front mold 210 and the second front mold 220 are arranged on both sides of the rotating table 100; the expansion assembly is connected to the rotating table 100, and a detachable expansion front mold 230 is installed on the expansion assembly, and the expansion front mold 230 is arranged on the adjacent sides of the first front mold 210 and the second front mold 220; the rotating motor is used to drive the rotating table 100 to rotate, so that the mold back mold 110 is switched to the mold closing position of the first front mold 210, the second front mold 220 and the expansion front mold 230 in sequence; the injection unit is used to inject colored material into the mold cavity after the mold closing.

[0029] It should be noted that the expandable injection molding machine provided in the embodiment of the utility model can be divided into an original working state and an expanded working state. In the original working state, the injection molding machine only uses the first front mold 210 and the second front mold 220 originally installed in the two-color injection molding machine, and can perform two-color injection molding of the product; when there is a need for three-color product injection molding, the expansion front mold 230 can be installed on the expansion component set in the original two-color injection molding machine to convert the injection molding machine to the expanded working state, and the corresponding injection molding unit can be installed to achieve the injection molding of the third color. Further, if Figure 3 As shown, the mold rear mold 110 of the expandable injection molding machine provided by the embodiment of the utility model is arranged on each side of the rotating table 100; when the rotating table 100 rotates, the position of the mold rear mold 110 can be switched between the first front mold 210, the second front mold 220 and the expansion front mold 230, so that the injection position of the mold rear mold 110 on each side is changed, and the first front mold 210, the second front mold 220 and the expansion front mold 230 can respectively close the mold with the mold rear mold 110 on one side of the rotating table 100 when closing the mold. In this way, only three different colors of paint need to be loaded in the injection molding units corresponding to the first front mold 210, the second front mold 220 and the expansion front mold 230, and the three-color injection molding function can be realized. Specifically, for example, the first front mold 210 is molded with the rear mold 110 at the corresponding mold closing position to perform injection molding of the first color. After the injection molding is completed, the mold is opened, and the rear mold rotates with the rotation of the rotating table 100 to move to the mold closing position of the second front mold 220, and the mold is closed to perform injection molding of the second color. Similarly, the third color is injected. After the injection molding is completed, the rotating table 100 rotates to the position where the front mold is not set to perform corresponding processing and demolding of the injection molded parts. Figure 2 , Figure 3As shown, in one embodiment of the present invention, the rotating table 100 is a cubic rotating table 100, having four sides, each of which is provided with a mold rear mold 110. When the mold front mold is switched, the rotating electrical area rotating table 100 rotates 90°; further, the rotating table 100 can also be set as a column with more sides according to needs, so that more mold rear molds 110 can be set on the rotating table 100, and the step length of the rotating motor can be adjusted to adjust the rotation angle, so that the mold rear mold 110 corresponds to the mold front mold at the mold closing position to achieve mold closing and mold opening. Further, one of the injection units refers to Figure 1 , Figure 1 The expanded injection molding device 510 of the expanded front mold 230 is shown in the figure. The structures of the corresponding injection molding units of the first front mold 210 and the second front mold 220 are similar to it, which are not shown in the figure.

[0030] It should be noted that the embodiment of the utility model can realize rapid switching between the two-color injection molding working state and the three-color injection molding working state. By moving the rear mold of the mold to different clamping positions on the rotating table, when two-color injection molding is required, the two-color injection molding can be achieved by adjusting the relevant parameters of the rotating motor and removing the expanded front mold 230 from the injection molding machine; when three-color injection molding is required, the expanded front mold 230 is installed on the expansion component, and the relevant parameters of the rotating motor are adjusted at the same time, so that the rear mold 110 of the mold can stay in the clamping position of the expanded front mold to achieve three-color injection molding.

[0031] Reference Figure 1-2 In some embodiments of the utility model, the injection molding machine further includes a first substrate 310, a second substrate 320 and an expansion substrate 330. The first substrate 310 and the second substrate 320 are arranged on both sides of the rotating table 100, and the expansion substrate 330 is arranged on adjacent sides of the first substrate 210 and the second substrate 220; the first front mold 210 is arranged on one end of the first substrate 310 close to the rotating table 100, the second front mold 220 is arranged on one end of the second substrate 320 close to the rotating table 100, the expansion substrate 330 is detachably mounted on the expansion component, and the expansion front mold 230 is arranged on one end of the expansion substrate 330 close to the rotating table 100.

[0032] It should be noted that the first substrate 310 and the second substrate 320 are vertically and parallelly arranged on both sides of the rotating table 100. Therefore, when the first front mold 210 and the second front film are molded, the first substrate 310 drives the first front mold 210 to move toward the rotating table 100 for mold closing, and the second substrate 320 drives the second front mold 220 to move toward the rotating table 100 for mold closing. The two substrates move on the same horizontal line but in opposite directions. Therefore, at this time, the pressures generated when the first front mold 210 and the second front mold 220 are molded and injected are also on the same center line to offset each other. Therefore, the first front mold 210 and the second front film 220 can reduce the setting of the locking mechanism during the mold closing process. Furthermore, the position of the expansion substrate 330 corresponds to the turntable 100, that is, when the expansion substrate 330 is installed on the expansion component and the turntable 100 rotates the mold rear mold 110 to the mold closing position, the position of the expansion front mold 230 always corresponds to the position of the mold rear mold 110 on one side of the turntable 100, ensuring the accuracy of the mold closing position.

[0033] Reference Figure 1-2 In some embodiments of the utility model, the injection molding machine also includes a sliding block 420 and a guide rod 410, the guide rod 410 is arranged between the first substrate 310 and the second substrate 320, and the sliding block 420 is slidably arranged on the guide rod 410; the sliding block 420 can slide between the first substrate 310 and the second substrate 320 along the guide rod 410; the rotating table 100 includes a base 103, a rotating shaft 102 and a rotating body 101, the rotating body 101 is rotatably sleeved on the rotating shaft 102, and the mold back mold 110 is arranged on the rotating body 101; one end of the rotating shaft 102 is fixed on the base 103, and the other end of the rotating shaft 102 is passed through the sliding block 420; the expansion component is installed on the sliding block 420.

[0034] It should be noted that the base 103 of the rotating table 100 is used to place the injection molding machine flat on the ground; the rotating table 100 is set on the sliding block 420 on the guide rod 410 through the rotating shaft 102, so that the rotating table 100 can rotate 360 ​​degrees between the first substrate 310 and the second substrate 320, and can also slide between the first substrate 310 and the second substrate 320 along the guide rod 410. When the type of the product to be injected changes, resulting in the replacement of the first front mold 210, the second front mold 220 and the mold back mold 110 corresponding to the two, the rotating table 100 can also slide between the first substrate 310 and the second substrate 320 along the guide rod 410 to adjust the relative distance between the rotating table 100 and the first substrate 310 and the second substrate 320 to adapt to the size of the new product. Further, since the expansion assembly is installed on the sliding block 420, the position of the expansion front mold 230 can move with the movement of the rotating table 100, and always corresponds to the mold closing position of the mold back mold 110.

[0035] Reference Figure 1-2 In some embodiments of the utility model, the expansion assembly includes a first mounting plate 430, a second mounting plate 440, a connecting rod 450 and a first driving device; the first mounting plate 430 is mounted on the base 103, the second mounting plate 440 is mounted on the sliding block 420, and the first mounting plate 430 and the second mounting plate 440 are connected by a connecting rod 450; a first guide rail 431 is provided on the upper surface of the first mounting plate 430, and a second guide rail 441 is provided on the lower surface of the second mounting plate 440; the lower end of the expansion substrate 330 is slidably connected to the first guide rail 431, and the upper end of the expansion substrate 330 is slidably connected to the second guide rail 441; the first driving device can drive the expansion substrate 330 to move along the first guide rail 431 and the second guide rail 441; the expansion substrate 330 can be removed from the first guide rail 431 and the second guide rail 441.

[0036] It should be noted that the first driving device (not shown in the figure) can drive the expansion base plate 330 to move along the first guide rail 431 and the second guide rail 441 to complete the mold closing and mold opening of the expansion front mold 230 and the mold rear mold 110 on the rotating table 100, so as to complete the injection molding process of the third color of the injection molding machine. When there is no need to inject the third color mold, the expansion base plate 330 can be removed from between the first mounting plate 430 and the second mounting plate 440 to achieve a quick switch from the three-color injection molding mode to the two-color injection molding mode. The first mounting plate 430 and the second mounting plate 440 are connected to the sliding block 420, so that the expansion base plate 330 set on the first mounting plate 430 can also move with the movement of the sliding block 420, even if the mold closing position of the expansion front mold 230 is not always fixed at one position, but changes with the change of the position of the rotating table 100. When the relative positions of the first substrate 310 , the second substrate 320 and the rotating table 100 change in the above-mentioned embodiments, the expansion substrate 330 can still be molded without additional adjustment of the position of the expansion substrate 330 .

[0037] In some embodiments of the present invention, the injection molding machine further includes an electronic ruler 460 , which is disposed on the first mounting plate 430 , and a sensing end of the electronic ruler 460 is disposed against an end of the expansion substrate 330 away from the rotating table 100 .

[0038] It should be noted that during the process of closing or opening the mold, the expansion substrate 330 can obtain the displacement data measured by the electronic ruler 460 through the relevant control unit of the injection molding machine, and then accurately control the moving distance and moving speed of the expansion substrate 330, so that the effect of the third color in the product after injection molding is better.

[0039] Reference Figure 4In some embodiments of the utility model, a locking mechanism is also provided on the expansion substrate 330; the locking mechanism includes a locking drive device, a first telescopic column 471 and a second telescopic column 472; the first telescopic column 471 is provided on the expansion substrate 330 on a side close to the rotating table 100, and the second telescopic column 472 is provided on the expansion substrate 330 on a side away from the rotating table 100; the locking drive device is used to drive the first telescopic column 471 and the second telescopic column 472 to extend or retract, and the first telescopic column 471 and the second telescopic column 472 can prevent the expansion substrate 330 from approaching or moving away from the rotating table 100 when extending.

[0040] It should be noted that the mold locking drive device (not shown in the figure) can be a drive cylinder; since there is no mold on the opposite side of the expansion base plate 330, it is not possible to use the same mold locking method as the first front mold 210 and the second front mold 220 to offset the stress generated by the product during the injection molding process, so a corresponding mold locking mechanism needs to be set. Specifically, Figure 4 As shown, the expansion substrate 330 is provided with a first telescopic column 471 above and below the side close to the rotating table 100, and the expansion substrate 330 is provided with a second telescopic column 472 above and below the side away from the rotating table 100. The first telescopic column 471 and the second telescopic column 472 can jointly apply sufficient clamping force during the mold closing process of the expansion front mold 230 to prevent the expansion substrate 330 from being opened by the expansion stress of the injection molded product during the injection molding process, thereby affecting the injection molding effect.

[0041] In some embodiments of the utility model, the injection unit includes a fixed injection device and an expansion injection device 510; the fixed injection device is used to inject colored material into the cavity after the first front mold 210 and the mold back mold 110 are molded together and into the cavity after the second front mold 220 and the mold back mold 110 are molded together; the expansion injection device 510 is detachably arranged on the side of the expansion substrate 330 away from the turntable 100; an injection port is arranged on the side of the expansion substrate 330 away from the turntable 100, and the expansion injection device 510 injects colored material into the cavity after the expansion front mold 230 and the mold back mold 110 are molded together through the injection port.

[0042] It should be noted that the fixed injection molding device (not shown in the figure) is the injection molding device of the original two-color injection molding machine, which is used to inject colored materials into the cavity after the first front mold 210 and the mold back mold 110 are molded together and into the cavity after the second front mold 220 and the mold back mold 110 are molded together. It is usually not removable; the expansion injection molding device 510 is installed on the side of the expansion base plate 330 away from the rotating table 100 according to whether the expansion front mold 230 is installed or not. It has a simple structure and is easy to install and disassemble, and does not require additional cost for maintenance.

[0043] Reference Figure 1-2In some embodiments of the utility model, the injection molding machine also includes a second driving device; the first substrate 310 is fixed to one end of the guide rod 410, and the second substrate 320 is slidably arranged at the other end of the guide rod 420, and the second driving device is used to drive the second substrate 320 to move along the guide rod 410 toward or away from the rotating table 100.

[0044] It should be noted that, in one embodiment of the present invention, the first substrate 310 is the fixed substrate of the original two-color injection molding machine, and the second substrate 320 is the movable substrate of the injection molding machine. Therefore, when closing the mold, only the second driving device can be set to drive the second substrate 320 to move along the guide rod 410 toward the direction close to the rotating table 100 and the first substrate 310. During the movement, the second substrate 320 will also push the rotating table 100 to move toward the first substrate 310, and finally close the first front mold 210 and the second front mold 220 at the position of the first substrate 310. Further, due to the rotating table, the first substrate 310 can be fixed on an external stable structure to make the clamping force between the first front mold 210, the second front mold 220 and the mold back mold 110 more stable when closing the mold.

[0045] In a second aspect, an embodiment of the utility model provides a three-color injection molding system, including an expandable injection molding machine according to the embodiment of the above aspect.

[0046] The following is a specific embodiment of the expandable injection molding machine provided by the utility model:

[0047] Before injection molding, first confirm the demand for this injection molding. If the demand is two-color injection molding, the expansion front mold 230 is not installed, and the mold rear mold 110 installed on the rotating table 100 is optional. Since the first substrate 310 and the second substrate 320 are relatively arranged, the rotation angle of the rotating motor can be set to 180°, that is, after the first front mold 210 and the mold rear mold 110 are molded and the first color material is injected, the mold rear mold 110 that has been injected is rotated 180° to the mold closing position of the second front mold 220 to inject the second color material, thereby realizing the two-color injection molding function;

[0048] Alternatively, if three-color injection molding is required, the expansion front mold 230 is installed on the expansion component, the mold back mold 110 is set on the four sides of the rotating table 100, and a mold back mold 110 is aligned with the first station at the same time. It can be understood that after the first station is aligned, since each mold front mold and the four sides of the rotating table 100 are relatively fixed, the first station, the second station, the third station and the fourth station are all aligned with the corresponding mold back mold 110 at this time; after the mold back mold 110 is aligned, the first front mold 210 and the mold back mold 110 are at the first station. According to the above-mentioned embodiment, since the first substrate 310 carrying the first front mold 210 is fixed, The closing of the first front mold 210 requires the second front mold 220 to push the rotating table 100 along the guide rod 410 to achieve the closing of the mold. Therefore, the injection molding between the first front mold 210, the second front mold 220 and the mold back mold 110 can be carried out simultaneously. At the same time, the injection molding unit can be controlled by the control unit of the expandable injection molding machine to selectively inject the mold. For example, when the expandable injection molding machine is started for the first time, when the first front mold 210 and the second front mold 220 are closed at the same time, the first color material has not been injected into the second front mold 220. At this time, the injection molding unit corresponding to the second front mold 220 can be selected not to inject the second color material between the second front mold 220 and the mold back mold 110 located at the third station. Further, after the injection molding is completed, the rotating table 100 rotates 90° in one direction, so that the mold back mold 110 on each side is replaced in the moving order of the first station -> the second station -> the third station -> the fourth station -> the first station. Taking the mold rear mold 110 that was originally switched from the first station to the second station as an example, after the injection of the first color material is completed, it switches to the second station, and the second station takes out the cold runner in the mold through the ejector plate set externally, etc.; then the mold rear mold 110 is subsequently switched to the third station, and the second front mold 220 is molded with it, and the corresponding injection molding unit injects the second color material. It can be understood that the method provided in the above embodiment is only based on the description of the mold closing process of a mold rear mold 110. While the current mold rear mold 110 is being transferred from the first station to the second station, a new mold rear mold 110 will be transferred to the first station for injection molding. Therefore, the four embodiments of the utility model The corresponding operations of injection molding or removing the cold runner can be performed simultaneously in the workstation, so continuous injection molding can be achieved; after the injection of the second color material is completed, the second front mold 220 is opened, and the rotating table 100 rotates the mold to the fourth workstation, and then the expanded front mold 230 is closed with the mold back mold 110 to achieve the injection molding of the third color material. Similarly, at this time, the injection molding of the first color material, the manufacture of the cold runner and the injection molding of the second color material are also performed simultaneously; during the closing process of the expanded front mold 230, the closing speed is controlled by an electronic ruler, and at the same time, the expansion front mold 230 and the mold back mold 110 are locked by the first telescopic column 471 and the second telescopic column 422 to ensure the injection molding effect of the injection molded product.After the injection molding of the third color material is completed, the front mold 230 is expanded and opened, and the molded three-color injection molded part is removed from the rear mold 110 to complete the injection molding of the three-color injection molded part.

[0049] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. An expandable injection molding machine, characterized in that: It includes a rotating table, an expansion component, a rotating motor, a first front mold, a second front mold, an expansion front mold, a mold back mold and an injection unit; the mold back mold is arranged on each side of the rotating table, and the first front mold and the second front mold are arranged on both sides of the rotating table; the expansion component is connected to the rotating table, and a detachable expansion front mold is installed on the expansion component, and the expansion front mold is arranged on the adjacent side of the first front mold and the second front mold; the rotating motor is used to drive the rotating table to rotate, so that the mold back mold is switched to the mold closing position of the first front mold, the second front mold and the expansion front mold in turn; the injection unit is used to inject colored material into the mold cavity after the mold is closed.

2. The expandable injection molding machine according to claim 1, characterized in that: The injection molding machine also includes a first substrate, a second substrate and an expansion substrate, the first substrate and the second substrate are respectively arranged on both sides of the turntable, and the expansion substrate is arranged on adjacent sides of the first substrate and the second substrate; the first front mold is arranged on one end of the first substrate close to the turntable, and the second front mold is arranged on one end of the second substrate close to the turntable; the expansion substrate is detachably mounted on the expansion component, and the expansion front mold is arranged on one end of the expansion substrate close to the turntable.

3. The expandable injection molding machine according to claim 2, characterized in that: The injection molding machine also includes a sliding block and a guide rod, the guide rod is arranged between the first substrate and the second substrate, and the sliding block sleeve is slidably arranged on the guide rod; the sliding block can slide between the first substrate and the second substrate along the guide rod; the rotating table includes a base, a rotating shaft and a rotating body, the rotating body is rotatably sleeved on the rotating shaft, and the mold back mold is arranged on the rotating body; one end of the rotating shaft is fixed on the base, and the other end of the rotating shaft is passed through the sliding block; the expansion component is installed on the sliding block.

4. The expandable injection molding machine according to claim 3, characterized in that: The expansion assembly includes a first mounting plate, a second mounting plate, a connecting rod and a first driving device; the first mounting plate is mounted on the base, the second mounting plate is mounted on the sliding block, and the first mounting plate and the second mounting plate are connected by the connecting rod; a first guide rail is provided on the upper surface of the first mounting plate, and a second guide rail is provided on the lower surface of the second mounting plate; the lower end of the expansion substrate is slidably connected to the first guide rail, and the upper end of the expansion substrate is slidably connected to the second guide rail; the first driving device can drive the expansion substrate to move along the first guide rail and the second guide rail; the expansion substrate can be removed from the first guide rail and the second guide rail.

5. The expandable injection molding machine according to claim 4, characterized in that: The injection molding machine further comprises an electronic ruler, which is arranged on the first mounting plate; a sensing end of the electronic ruler is arranged against a side of the expansion base plate away from the rotating platform.

6. The expandable injection molding machine according to claim 2, characterized in that: A locking mechanism is also provided on the expansion substrate; the locking mechanism includes a locking drive device, a first telescopic column and a second telescopic column; the first telescopic column is provided on a side of the expansion substrate close to the rotating table, and the second telescopic column is provided on a side of the expansion substrate away from the rotating table; the locking drive device is used to drive the first telescopic column and the second telescopic column to extend or retract, and the first telescopic column and the second telescopic column can prevent the expansion substrate from approaching or moving away from the rotating table when extended.

7. The expandable injection molding machine according to claim 2, characterized in that: The injection unit includes a fixed injection device and an expansion injection device; the fixed injection device is used to inject the colored material into the cavity after the first front mold and the mold back mold are molded together and into the cavity after the second front mold and the mold back mold are molded together; the expansion injection device is detachably arranged on a side of the expansion substrate away from the turntable; an injection port is arranged on a side of the expansion substrate away from the turntable, and the expansion injection device injects the colored material into the cavity after the expansion front mold and the mold back mold are molded together through the injection port.

8. The expandable injection molding machine according to claim 3, characterized in that: The injection molding machine also includes a second driving device; the first substrate is fixed to one end of the guide rod, and the second substrate is slidably arranged at the other end of the guide rod; the second driving device is used to drive the second substrate to move along the guide rod toward or away from the rotating table.

9. An injection molding system, characterized in that: An expandable injection molding machine comprising the method described in any one of claims 1 to 8.

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