Injection mold for producing double-color double-barrel plastic part

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold for producing a double-color double-barrel plastic part, which comprises a rear mold assembly, a front mold assembly, an ejection assembly, a pouring system and a cooling system, the rear mold assembly and the front mold assembly are buckled with each other to form a cavity for injection molding, the pouring system injects heat flow into the cavity, and the cooling system is connected with the ejection assembly. The cooling system is used for cooling the plastic part product; the ejection assembly is used for ejecting out the plastic part product; the plastic product is provided with an inner shell and an outer shell, the inner shell is injection-molded to form hard plastic, the outer shell is injection-molded to form soft plastic, and the soft plastic wraps the outer side of the hard plastic; the front mold assembly is provided with a first front mold and a second front mold, the first front mold carries out injection molding production on hard plastic, and the second front mold carries out injection molding production on soft plastic. In conclusion, the shell can be integrally formed through injection molding, and the outer shell is made of relatively soft plastic, so that the use comfort of people is improved, the injection molding cost can be reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of injection mould, especially to injection mould of production two -color double cylinder body plastic piece. BACKGROUND

[0002] With the development of modern society, more and people work in the office, resulting in long-term office posture, and the muscles of shoulder, neck, back and leg appear fatigue or degradation, and people also take many ways to improve it. Among them, using the corresponding massager to massage, and beating the corresponding muscles can improve the above situation well.

[0003] And the handle or the body outside of the conventional massager or beating device is usually made of hard plastic, which will form tremor to the palm in use, is not comfortable enough, and when falling, it is also easy to hurt the user. If all the soft plastic is used to make, the support of other parts in the internal is not firm enough. Therefore, the inner shell is made of hard plastic, and the outer shell is made of soft plastic, but this also puts forward new problems for injection mould and injection process.

[0004] In addition, the massage device or beating device usually has two cylinders connected and perpendicular to each other, and in the injection process, it also causes one cylinder to be unable to separate from the mold in the same direction, so the ordinary injection process cannot be well completed. Only by separating the cylinder into two halves can the injection be separated, and then the combination is carried out by using the buckle connection or bolt connection, which increases more production procedures and also reduces the overall structural strength of the cylinder.

[0005] Therefore, when producing two-color double-cylinder plastic parts, how to use the injection mould to carry out integrated injection molding is a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0006] The utility model is aimed at providing a technical solution to solve the above problems.

[0007] This utility model provides an injection mold for producing two-color, twin-cylinder plastic parts, including a rear mold assembly, a front mold assembly, an ejector assembly, a gating system, and a cooling system. The rear mold assembly and the front mold assembly are interlocked, forming a cavity at the interlocking point for injection molding the plastic part. The gating system injects a corresponding amount of hot plastic fluid into the cavity, and the cooling system cools the plastic part formed in the cavity. The ejector assembly ejects the plastic part after the rear mold assembly and the front mold assembly separate. The plastic part has an inner shell and an outer shell. The inner shell is injection molded from a material with a certain hardness to form a hard plastic, and the outer shell is injection molded from a material with a certain softness to form a soft plastic. The soft plastic wraps around the hard plastic, thus forming a two-color plastic part. The front mold assembly has a first front mold and a second front mold. The first front mold is used for injection molding the hard plastic part, and the second front mold is used for injection molding the soft plastic part.

[0008] As a further embodiment of this utility model: the plastic product is further provided with a first cylinder and a second cylinder, one end of the second cylinder is fixedly connected to the side wall of the first cylinder, and the other end forms a free end, wherein the central axes of the first cylinder and the second cylinder intersect each other and are perpendicular to each other; the rear mold assembly is provided with a lower mold core and a long rod mold core, and the front mold assembly is provided with an upper mold core, wherein the upper mold core and the lower mold core cooperate with each other to form an inner core mold for the injection molding of the hard plastic part of the first cylinder inside the cavity; the long rod mold core extends into the cavity from a position relative to the free end of the second cylinder to form an inner core mold for the injection molding of the hard plastic part of the second cylinder inside the cavity.

[0009] As a further embodiment of this utility model: the first front mold is provided with a first form and a first inclined guide post. The first form is respectively engaged with the inner core mold from both sides of the injection mold, thereby forming the outer hard plastic core mold of the hard plastic part of the injection molded first cylinder and second cylinder; the gating system injects hard plastic heat flow into the cavity between the inner core mold and the outer hard plastic core mold, thereby casting to form the inner shell of the plastic product; the first form is provided with a first inclined hole, and the first inclined guide post and the first inclined hole cooperate with each other to move the first form.

[0010] As a further embodiment of this utility model: the second front mold is provided with a second form and a second inclined guide post. The second form is respectively fastened to the inner shell from both sides of the injection mold, thereby forming the outer soft plastic core mold of the soft plastic part of the injection molded first cylinder and second cylinder; the gating system injects soft plastic hot flow into the cavity between the inner shell and the outer soft plastic core mold, thereby casting to form the outer shell of the plastic product; the second form is provided with a second inclined hole, and the second inclined guide post and the second inclined hole cooperate with each other to move the second form.

[0011] As a further embodiment of this utility model: the long rod mold core is provided with a long rod slider, the rear mold assembly is also provided with a translation motor and a translation strip, the drive shaft of the translation motor is provided with a drive gear, the long rod slider is provided with a driven post, one end of the translation strip is provided with a drive hole, and the other end is provided with a drive tooth, the drive tooth meshes with the drive gear, and the drive hole is sleeved on the driven post, so that the translation motor can drive the long rod slider to move a certain distance through the translation strip.

[0012] As a further embodiment of this utility model: the rear mold assembly is also provided with a sensor, and the long rod slider is provided with a sensing plate. The sensor and the sensing plate cooperate with each other to sense the moving position of the long rod slider.

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

[0014] 1. By setting up a first front mold and a second front mold that cooperate with the rear mold assembly respectively, the first front mold and the rear mold assembly are used to injection mold the hard plastic part to form the inner shell; then the second front mold and the rear mold assembly are used to injection mold the soft plastic part to form the outer shell. The relatively flexible outer shell can wrap around the relatively rigid inner shell, which can not only support the internal components, but also absorb shock from the external gripping hand, thus improving the user's comfort.

[0015] 2. Furthermore, by setting a long rod mold core, the long rod mold core is inserted into the cavity of the mold from the side of the mold to form the inner core mold of the second injection molding body. This allows the two cylinders of the plastic part to be completed in one injection molding process in the same injection mold, thereby simplifying the injection molding process and improving production efficiency.

[0016] 3. Furthermore, by using a motor-driven method to move the long rod mold core, it can be removed from the relatively long second cylinder, allowing the ejection assembly to eject the plastic part normally, thereby improving injection molding efficiency and reducing injection molding costs.

[0017] Therefore, with the above improvements, this utility model can provide an injection mold for producing two-color, double-cylinder plastic parts, so that the shell of the massage device or percussion device can be integrally injection molded, and the shell can be made of relatively soft, elastic soft plastic, thereby improving the comfort of users, reducing injection molding costs, and improving production efficiency.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the lower mold frame of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first front mold of this utility model;

[0023] Figure 4 This is a schematic diagram of the upper mold frame of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the second front mold of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the long rod mold core of this utility model;

[0026] Figure 7 This is a schematic diagram of the translation motor of this utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the inner core mold composed of the lower mold core, the upper mold core, and the long rod mold core of this utility model.

[0028] The reference numerals and names in the figure are as follows:

[0029] 10 Rear mold assembly; 11 Lower mold base; 12 Sensor; 13 Translation motor; 14 Drive gear; 15 Translation strip; 16 Drive hole; 17 Drive gear; 18 Lower mold core; 20 Long rod mold core; 21 Long rod slider; 22 Wear-resistant plate; 23 Passive column; 24 Sensor plate; 25 Third oblique hole; 30 Front mold assembly; 31 Upper mold base; 32 Upper mold core; 33 Shovel base; 40 First front mold; 41 First shape and position; 42 First oblique hole; 43 First oblique guide post; 50 Second front mold; 51 Second shape and position; 52 Second oblique hole; 53 Second oblique guide post; 54 Third oblique guide post; 60 Ejector assembly; 61 Positioning assembly; 62 Gating system; 63 Cooling system; 64 Panel; 65 Base plate; 66 Square iron; 70 Plastic part; 71 First cylinder; 72 Second cylinder. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Please see Figures 1 to 8 In this embodiment of the present invention, an injection mold for producing two-color, double-cylinder plastic parts includes a rear mold assembly 10, a front mold assembly 30, a gating system 62, and a cooling system 63. The rear mold assembly 10 and the front mold assembly 30 are interlocked, forming a cavity at the interlocking point for injection molding the plastic part 70. The gating system 62 is used to inject corresponding hot plastic flow into the cavity, and the cooling system 63 is used to cool the plastic part 70 formed in the cavity. The rear mold assembly 10 is provided with an ejector assembly 60, which is used to eject the plastic part 70 formed in the cavity from the rear mold assembly 10. After the mold assembly 30 is separated, the plastic product 70 is ejected. The plastic product 70 is provided with an inner shell and an outer shell. The inner shell is injection molded from a raw material with a certain hardness to form a hard plastic, and the outer shell is injection molded from a raw material with a certain softness to form a soft plastic. The soft plastic wraps around the outside of the hard plastic, thereby forming a two-color plastic product 70. The front mold assembly 30 is provided with a first front mold 40 and a second front mold 50. The first front mold 40 is used for injection molding of the hard plastic part, and the second front mold 50 is used for injection molding of the soft plastic part.

[0032] Specifically, in order to produce the plastic part product 70 with an inner hard plastic body and an outer soft plastic body, it is preferable to first injection mold the hard plastic part of the inner shell, and then injection mold the soft plastic part of the outer shell. Since the outer shell is fitted outside the inner shell, its size must be slightly larger than that of the inner shell. Therefore, different shapes and positions are needed to form cavities of different sizes to complete the entire injection molding production process. During the entire injection molding process, the rear mold assembly 10 and the corresponding ejector assembly 60 do not need to be changed. Therefore, only one rear mold assembly 10 needs to be set. Understandably, the ejector assembly 60, base plate 65, and square iron 66 connected to the rear mold assembly 10 also do not need to be replaced.

[0033] Secondly, by setting up a first front mold 40 and a second front mold 50, the inner shell and outer shell can be injection molded separately. This eliminates the need to remove the inner shell molded using the first front mold 40; instead, the first front mold 40 can be directly separated, and then the second front mold 50 can be docked with the rear mold assembly 10 to form a new mold for injection molding the outer shell. Furthermore, in the specific movement and docking process, the front mold assembly 30 can be set as a stationary component, while the rear mold assembly 10 and its corresponding components can be set as moving components. The moving rear mold assembly 10 can then cyclically move and dock between the first front mold 40 and the second front mold 50. Alternatively, the rear mold assembly 10 and its corresponding components can be set as stationary components, while the first front mold 40 and the second front mold 50 can be set as moving components. First, the first front mold 40 can be moved to dock with the rear mold assembly 10. After the inner shell is injection molded, it is left on the rear mold assembly 10, and then the first front mold 40 is removed. Then, the second front mold 50 is moved to the docking position of the rear mold assembly 10 to form a mold for injection molding of the outer shell, and the outer shell is injection molded on the outside of the inner shell, so that the outer shell can be firmly bonded to the inner shell.

[0034] Furthermore, the gating system 62 and cooling system 63 on the first front mold 40 and the second front mold 50 can be configured as different systems according to the different inner and outer shells to be injection molded. A matching cooling system 63 can also be provided on the rear mold assembly 10, maintaining a fixed connection with it without replacement. Additionally, a matching positioning component 61 is required to ensure smooth connection of the first front mold 40 and the second front mold 50 to the rear mold assembly 10. The rear mold assembly 10 can also be equipped with a base plate 65 and a square iron 66 as in the prior art, while the front mold assembly 30 can be equipped with a panel 64 as in the prior art.

[0035] like Figure 6 and Figure 7 As shown, preferably, the plastic product 70 is further provided with a first cylindrical body 71 and a second cylindrical body 72. One end of the second cylindrical body 72 is fixedly connected to the side wall of the first cylindrical body 71, and the other end forms a free end. The central axes of the first cylindrical body 71 and the second cylindrical body 72 intersect each other and are perpendicular to each other. The rear mold assembly 10 is provided with a lower mold core 18 and a long rod mold core 20. The front mold assembly 30 is provided with an upper mold core 32. The upper mold core 32 and the lower mold core 18 cooperate with each other to form an inner core mold for injection molding the hard plastic part of the first cylindrical body 71 inside the cavity. The long rod mold core 20 extends into the cavity from a position relative to the free end of the second cylindrical body 72 to form an inner core mold for injection molding the hard plastic part of the second cylindrical body 72 inside the cavity.

[0036] Specifically, for ease of use, the handle and body of a massager or percussion device are typically arranged perpendicularly, meaning the central axis of the first cylinder 71 is perpendicular to the central axis of the second cylinder 72. The second cylinder 72 essentially lies flat on the lower mold base 11, with its axis perpendicular to the mold opening direction. Therefore, its inner core mold cannot move in a manner that follows the mold's opening and closing. Instead, a long-rod mold core 20 is used, which inserts into the cavity from the side of the mold and mates with the inner core of the first cylinder 71 to form the inner core mold of the entire plastic part 70. It is understandable that the axis of the first cylinder 71 is consistent with the mold opening direction; therefore, the upper mold core 32 and lower mold core 18 can be used for this purpose. When docking or separating is required, the movement can be directly achieved through the corresponding mold opening or closing operations. However, for the long-rod mold core 20, an additional movement method is needed.

[0037] like Figure 2 and Figure 3 As shown, preferably, the first front mold 40 is provided with a first positioning point 41 and a first inclined guide post 43. The first positioning point 41 is respectively fastened to the inner core mold from both sides of the injection mold, thereby forming the outer hard plastic core mold of the hard plastic part of the injection molded first cylinder 71 and second cylinder 72. The gating system 62 injects hard plastic heat flow into the cavity between the inner core mold and the outer hard plastic core mold, thereby casting to form the inner shell of the plastic product 70. The first positioning point 41 is provided with a first inclined hole 42. The first inclined guide post 43 cooperates with the first inclined hole 42 to move the first positioning point 41.

[0038] Specifically, in the first front mold 40, the upper mold core 32 and the lower mold core 18 cooperate to form the inner core mold of the injection-molded inner shell. An outer core mold is also needed on the outside of the inner core mold to form the cavity of the injection-molded inner shell. Therefore, a first locating element 41 is required to form the outer hard plastic core mold. Preferably, the first locating element 41 has two locating elements on both sides of the mold, which move from both sides towards the inner core mold, thus forming the outer hard plastic core mold on the outside of the inner core mold. To move the first locating element 41, a first oblique hole 42 is preferably provided on the first locating element 41. A first oblique guide post 43, fixed on the mold frame of the first front mold 40, is inserted into the first oblique hole 42 and cooperates with it. As the first oblique guide post 43 moves with the first front mold 40, it drives the first oblique hole 42, thereby moving the first locating element 41.

[0039] like Figure 4 and Figure 5As shown, preferably, the second front mold 50 is provided with a second form 51 and a second inclined guide post 53. The second form 51 is respectively fastened to the inner shell from both sides of the injection mold, thereby forming the outer soft plastic core mold of the soft plastic part of the injection molded first cylinder 71 and second cylinder 72. The gating system 62 injects soft plastic hot flow into the cavity formed between the inner shell and the outer soft plastic core mold, thereby casting to form the outer shell of the plastic product 70. The second form 51 is provided with a second inclined hole 52. The second inclined guide post 53 and the second inclined hole 52 cooperate with each other to move the second form 51.

[0040] Specifically, when the second front mold 50 is docked with the rear mold assembly 10 and the outer shell is injection molded, the inner shell can be used to form a corresponding inner core mold. At the same time, an outer core mold needs to be set on the outside of the inner shell to form the cavity of the injection molded outer shell. Therefore, a second form 51 is needed to form the outer soft plastic core mold. The second form 51 can also be formed by setting two corresponding forms on both sides of the mold and moving them from both sides towards the inner shell, thereby forming the outer soft plastic core mold on the outside of the inner shell. Similarly, in order to move the second form 51, it is preferable to set a second oblique hole 52 on the second form 51. The second oblique guide post 53, which is fixed on the mold frame of the second front mold 50, is inserted into the second oblique hole 52 and cooperates with each other to form a sliding connection. As the second oblique guide post 53 moves with the second front mold 50, it can drive the second oblique hole 52, thereby moving the second form 51.

[0041] like Figures 3 to 5 As shown, preferably, the long rod mold core 20 is provided with a long rod slider 21, and a wear-resistant plate 22 is provided on the long rod slider 21. The first front mold 40 and the second front mold 50 are respectively provided with shovel bases 33. The shovel bases 33 and the wear-resistant plate 22 cooperate with each other to press the long rod slider 21 onto the rear mold assembly 10, so that the long rod mold core 20 is stable in the cavity.

[0042] Specifically, when the first front mold 40 docks with the rear mold assembly 10, the long rod mold core 20 needs to be moved to the corresponding position of the inner shell of the injection molding second cylinder 72. The long rod mold core 20 can be moved using the cooperation of the translation motor 13 and the translation strip 15. However, during the injection molding process, the translation motor 13 cannot run continuously, and its driving force is insufficient to keep the position of the long rod mold core 20 unchanged during the injection molding process. The long rod core 20 and the long rod slider 21 are fixedly connected to each other. Therefore, a wear-resistant plate 22 with a certain inclination angle can be set on the long rod slider 21. Then, a corresponding shovel base 33 is set on the mold frame of the first front mold 40, and the shovel base 33 is also set with a corresponding inclination angle. So that when the first front mold 40 and the rear mold assembly 10 are closed, the shovel base 33 can drive the wear-resistant plate 22 to move towards the cavity, thereby driving the long rod slider 21 and the long rod core 20 to move synchronously. After the mold is closed, the shovel base 33 continues to abut against the wear-resistant plate 22 to ensure that the long rod core 20 can maintain its position during the injection molding process.

[0043] Secondly, after the inner shell is injection molded, the first front mold 40 can be separated, and then the second front mold 50 can be docked with the rear mold assembly 10. At this time, although the long rod mold core 20 does not need to be moved, the position of the long rod mold core 20 still needs to be kept unchanged. Therefore, a corresponding shovel base 33 can also be set on the mold frame of the second front mold 50 so that it can abut against the wear-resistant plate 22 during the injection molding process.

[0044] like Figure 4 and Figure 5 As shown, preferably, a third oblique hole 25 is also provided on the long rod slider 21, and a third oblique guide post 54 is also provided on the mold frame of the second front mold 50. The third oblique guide post 54 is inserted into the third oblique hole 25 and cooperates with each other to form a sliding connection.

[0045] Specifically, after the second front mold 50 is connected to the rear mold assembly 10 and the outer shell is injection molded, the second front mold 50 needs to be separated so that the ejector assembly 60 can eject the injection-molded plastic part 70. Because the mold maintains a certain degree of rigidity during injection molding, a large force is required to separate the mold during demolding. If only the translation motor 13 and the translation strip 15 are used to move the long rod mold core 20, the required driving force is too large and could easily damage the motor. Therefore, a third inclined guide post 54 can be set on the upper mold base 31 of the second front mold 50. The large driving force when the second front mold 50 separates from the rear mold assembly 10 drives the third inclined guide post 54 to move synchronously, thereby driving the third inclined hole 25, causing the long rod slider 21 and the long rod mold core 20 to be moved a certain distance to the outside of the mold. After the long rod slider 21 and the long rod mold core 20 have moved a certain distance, the translation motor 13 and the translation strip 15 can be used to move them again.

[0046] like Figures 6 to 8 As shown, preferably, the rear mold assembly 10 is further provided with a translation motor 13 and a translation strip 15. A drive gear 14 is provided on the drive shaft of the translation motor 13, and a driven post 23 is provided on the long rod slider 21. One end of the translation strip 15 is provided with a drive hole 16, and the other end is provided with a drive tooth 17. The drive tooth 17 meshes with the drive gear 14, and the drive hole 16 is fitted onto the driven post 23, thereby allowing the translation motor 13 to drive the long rod slider 21 to move a certain distance via the translation strip 15. The rear mold assembly 10 is also provided with a sensor 12, and a sensing plate 24 is provided on the long rod slider 21. The sensor 12 and the sensing plate 24 cooperate with each other to sense the moving position of the long rod slider 21.

[0047] Specifically, since the long rod mold core 20 is relatively long, the movement method using only the third inclined guide post 54 and the third inclined hole 25 cannot completely remove the long rod mold core 20 from the injection cavity. Therefore, a translation strip 15 can be set to cooperate with the translation motor 13, allowing the long rod mold core 20 to move a longer distance, thus completely removing it from the cavity and allowing the injection molded product to be ejected normally. Understandably, corresponding sensors 12 and sensing plates 24 can also be set so that the long rod mold core 20 can automatically stop after moving to the corresponding position. The sensors 12 and sensing plates 24 can be existing products in the prior art, such as position sensors, Hall sensors, or infrared sensors, as long as they can detect when the long rod slider 21 moves to the corresponding position and send a corresponding stop signal to the translation motor 13.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An injection mold for producing two-color, double-cylinder plastic parts, characterized in that, The system includes a rear mold assembly, a front mold assembly, an ejector assembly, a gating system, and a cooling system. The rear mold assembly and the front mold assembly are interlocked, forming a cavity at the interlocking point for injection molding of the plastic part. The gating system injects a corresponding amount of hot plastic fluid into the cavity, and the cooling system cools the plastic part formed in the cavity. The ejector assembly ejects the plastic part after the rear mold assembly and the front mold assembly separate. The plastic part has an inner shell and an outer shell. The inner shell is injection molded from a material with a certain hardness to form a hard plastic, and the outer shell is injection molded from a material with a certain softness to form a soft plastic. The soft plastic wraps around the hard plastic, thus forming a two-color plastic part. The front mold assembly has a first front mold and a second front mold. The first front mold is used for injection molding the hard plastic portion, and the second front mold is used for injection molding the soft plastic portion.

2. The injection mold for producing two-color, double-cylinder plastic parts according to claim 1, characterized in that, The plastic part product is further provided with a first cylinder and a second cylinder. One end of the second cylinder is fixedly connected to the side wall of the first cylinder, and the other end forms a free end. The central axes of the first cylinder and the second cylinder intersect each other and are perpendicular to each other. The rear mold assembly is provided with a lower mold core and a long rod mold core, and the front mold assembly is provided with an upper mold core. The upper mold core and the lower mold core cooperate with each other to form an inner core mold for the injection molding of the hard plastic part of the first cylinder inside the cavity. The long rod mold core extends into the cavity from a position relative to the free end of the second cylinder to form an inner core mold for the injection molding of the hard plastic part of the second cylinder inside the cavity.

3. The injection mold for producing two-color, double-cylinder plastic parts according to claim 2, characterized in that, The first front mold is provided with a first form and a first inclined guide post. The first form is respectively engaged with the inner core mold from both sides of the injection mold, thereby forming the outer hard plastic core mold of the hard plastic part of the injection molded first cylinder and the second cylinder. The gating system injects hard plastic hot flow into the cavity between the inner core mold and the outer hard plastic core mold, thereby casting to form the inner shell of the plastic product. The first form is provided with a first inclined hole. The first inclined guide post and the first inclined hole cooperate with each other to move the first form.

4. The injection mold for producing two-color, double-cylinder plastic parts according to claim 3, characterized in that, The second front mold is provided with a second form and a second inclined guide post. The second form is respectively fastened to the inner shell from both sides of the injection mold, thereby forming the outer soft plastic core mold of the soft plastic part of the injection molded first cylinder and second cylinder. The gating system injects soft plastic hot flow into the cavity between the inner shell and the outer soft plastic core mold, thereby casting to form the outer shell of the plastic product. The second form is provided with a second inclined hole. The second inclined guide post and the second inclined hole cooperate with each other to move the second form.

5. The injection mold for producing two-color, double-cylinder plastic parts according to claim 4, characterized in that, The long rod mold core is equipped with a long rod slider, and the rear mold assembly is also equipped with a translation motor and a translation strip. The drive shaft of the translation motor is equipped with a drive gear, and the long rod slider is equipped with a driven post. One end of the translation strip is equipped with a drive hole, and the other end is equipped with a drive tooth. The drive tooth meshes with the drive gear, and the drive hole is fitted onto the driven post, so that the translation motor can drive the long rod slider to move a certain distance through the translation strip.

6. The injection mold for producing two-color, double-cylinder plastic parts according to claim 5, characterized in that, The rear mold assembly is also equipped with a sensor, and the long rod slider is equipped with a sensing plate. The sensor and the sensing plate cooperate with each other to sense the movement position of the long rod slider.

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