Injection mold of washing machine barrel

Abstract

The injection mold comprises an upper mold body, a lower mold body, a driving device, a guiding structure, an inner forming assembly and a plurality of outer forming assemblies, the upper mold body, the lower mold body, the inner forming assembly and the outer forming assemblies are used for forming a cavity of the washing machine barrel, and the inner forming assembly is installed on the upper mold body and used for forming the inner side of the washing machine barrel; the outer forming assembly is used for forming the outer side of the washing machine barrel, the outer forming assembly is movably arranged on the upper mold and matched with the lower mold through a guide structure, the driving device is installed on the outer forming assembly, and the output end of the driving device is connected with the lower mold. The demolding device has the beneficial effects that in the demolding process, the separation process of the washing machine barrel and the inner forming assembly does not need to be driven by an ejector pin mechanism, the demolding process is achieved through rib position matching of the outer forming assembly and the washing machine barrel, in this way, the demolding stability is good, and the washing machine barrel cannot be damaged; and the product quality and the demoulding smoothness are greatly improved.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to an injection mold for a washing machine drum. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] The existing washing machine drum has a shape and structure such as Figure 1 The figure shows a washing machine drum product, which is formed by injection molding and generally consists of an outer molding component and an inner molding component. That is, the upper mold drives the outer molding component to be demoulded, and then the product adheres to the inner molding component on the lower mold. Finally, the product is ejected and separated from the inner molding component by the ejector mechanism. We know that the washing machine drum is a cylindrical structure, and the ejector mechanism can generally only be pushed directly to the bottom of the drum of the product (corresponding to Figure 1 The top position in the middle), while the side inner wall of the product is still adhered to the inner molded component, so it is difficult to demould, and even the product is damaged during demoulding. For this reason, an injection mold for a washing machine drum is proposed to solve the above technical problems. Summary of the invention

[0004] One of the purposes of the present application is to provide an injection mold for a washing machine drum.

[0005] To achieve the above purpose, the technical solution adopted in the present application is: an injection mold for a washing machine drum, comprising an upper mold, a lower mold, a driving device, a guide structure, an inner molding component and a plurality of outer molding components, wherein the upper mold, the lower mold, the inner molding component and the outer molding component are used to form a cavity of the washing machine drum, wherein the inner molding component is installed on the upper mold and is used to form the inner side of the washing machine drum, and the outer molding component is used to form the outer side of the washing machine drum, and the outer molding component is movably arranged on the upper mold and cooperates with the lower mold through the guide structure, and the driving device is installed on the outer molding component and the output end is connected to the lower mold; when opening the mold, the driving device is suitable for driving the lower mold to move up and away from the upper mold, and then the outer molding component is suitable for moving upward and away from the upper mold under the action of the guide structure, so that the outer molding component drives the washing machine drum to move up and disengage from the inner molding component through the rib position on the side of the washing machine drum, and at the same time, the outer molding component is away from the washing machine drum until the outer molding component is separated from the molded washing machine drum.

[0006] Preferably, an ejector assembly is elastically slidably provided in the lower mold; when the mold is opened, the lower mold is separated from the upper mold, and then the ejector assembly is suitable for ejecting the washing machine drum under the action of elastic force and separating it from the lower mold.

[0007] Preferably, the ejector assembly includes an ejector plate and a plurality of ejector columns, the ejector plate is vertically slidably mounted on the lower mold via an elastic member, and the ejector column is vertically mounted on the ejector plate; before the mold is opened, the ejector plate cooperates with the upper mold, and the elastic member is in a compressed energy storage state; when the mold is opened, the upper mold is separated from the ejector plate, and the ejector plate is suitable for driving the ejector column to eject the washing machine drum in the lower mold under the action of the elastic member.

[0008] Preferably, the driving device is obliquely installed on the external molding component, and the external molding component is obliquely slidably arranged on the upper mold, and the guide structure includes an oblique guide column and an oblique guide groove, the oblique guide column is installed on the lower mold, and the oblique guide groove is arranged on the external molding component, and the oblique guide groove is obliquely slidably matched with the oblique guide column.

[0009] Preferably, adjacent outer molding components are matched with each other through a synchronous structure; when opening the mold, the plurality of outer molding components are suitable for performing synchronous activities driven by the synchronous structure.

[0010] Preferably, the synchronization structure comprises a synchronization bar; one end of the synchronization bar is detachably mounted on one of the outer molding components, and the other end of the synchronization bar is snap-fitted with an adjacent outer molding component.

[0011] Preferably, a demoulding mechanism is provided on the outer molding component; during demoulding, the demoulding mechanism is suitable for disengaging from the deep ribs on the side of the washing machine drum.

[0012] Preferably, the demolding mechanism includes a driving component and a molding component, the driving component is installed on the external molding component and the output end is connected to the molding component; when demolding, the driving component is suitable for driving the molding component to move and disengage from the deep ribs on the side of the washing machine drum.

[0013] Preferably, the demolding mechanism includes a molding part, which is elastically slidably mounted on the outer molding component; when demolding is performed, the outer molding component moves away from the upper mold, and then the molding part is separated from the deep ribs on the side of the washing machine drum under the action of elastic force.

[0014] Preferably, the outer molding components have four groups and are located around the drum body of the washing machine, and the driving devices have two groups and are arranged opposite to each other.

[0015] Compared with the prior art, the beneficial effects of this application are: The present invention is provided with an external molding component. When demolding, the separation process of the washing machine drum and the internal molding component does not need to be driven by a pin mechanism. The demolding process is achieved by the cooperation between the external molding component and the ribs of the washing machine drum itself. In this way, the demolding has good stability and will not cause damage to the washing machine drum, which greatly improves the product quality and the smoothness of demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the existing washing machine drum product of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the outer molding component and the guide structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the synchronization structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the present invention when it is not demoulded.

[0021] Figure 6 It is a schematic diagram of the working principle of the demoulding of the present invention.

[0022] Figure 7 It is a schematic diagram of the washing machine drum being located in the lower mold after demoulding of the present invention.

[0023] Figure 8 It is a specific schematic diagram of the synchronization structure of the present invention.

[0024] Fig. 9 It is a schematic diagram of one embodiment of the demoulding mechanism of the present invention.

[0025] Fig.10 It is a schematic structural diagram of another embodiment of the demoulding mechanism of the present invention.

[0026] Fig.11 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0027] Fig.12 It is a schematic structural diagram of the ejector pin assembly of the present invention.

[0028] In the figure: 1. washing machine drum; 101. rib position; 2. upper mold; 3. lower mold; 4. driving device; 5. guiding structure; 501. oblique guide column; 502. oblique guide groove; 6. outer molding component; 7. synchronization structure; 701. synchronization bar; 8. inner molding component; 9. demoulding mechanism; 901. driving component; 902. molding part; 10. ejector assembly; 1001. ejector plate; 1002. ejector column. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] One of the preferred embodiments of the present application is as follows: Figures 1 to 12 As shown, an injection mold for a washing machine drum comprises an upper mold 2, a lower mold 3, a driving device 4, a guiding structure 5, an inner molding component 8 and a plurality of outer molding components 6, wherein the upper mold 2, the lower mold 3, the inner molding component 8 and the outer molding component 6 are used to form the cavity of the washing machine drum 1, the inner molding component 8 is installed on the upper mold 2 and is used to form the inner side of the washing machine drum 1, the outer molding component 6 is used to form the outer side of the washing machine drum 1, the outer molding component 6 is movably arranged on the upper mold 2 and cooperates with the lower mold 3 through the guiding structure 5, the driving device 4 is installed on the outer molding component 6 and the output end is connected to the lower mold 3.

[0033] It is understandable that when the mold is opened, the drive device 4 is started, such as Figure 6 As shown, the lower mold 3 moves upward and away from the upper mold 2 under the action of the driving device 4. At this time, the outer molding component 6 will move upward and away from the upper mold 2 under the action of the guide structure 5. We know that there are many ribs 101 on the outside of the washing machine drum 1. Therefore, in the process of the outer molding component 6 moving upward, the outer molding component 6 will cooperate with the ribs 101 to drive the entire washing machine drum 1 to move upward, so that the washing machine drum 1 and the inner molding component 8 are separated. At the same time, the outer molding component 6 will also move away from the washing machine drum 1 during the upward movement until the outer molding component 6 is separated from the molded washing machine drum 1, thereby realizing the demolding process of the washing machine drum 1 and the inner molding component 8.

[0034] It can be seen that the separation process of the washing machine drum 1 and the inner molding component 8 does not need to be driven by a pin mechanism. The demoulding process is realized by the cooperation between the outer molding component 6 and the ribs 101 of the washing machine drum 1 itself. In this way, the demoulding has good stability and will not cause damage to the washing machine drum 1, which greatly improves the product quality and smoothness of demoulding.

[0035] Of course, although the inside and outside of the washing machine drum 1 have been demolded, the bottom of the washing machine drum 1 (i.e., the bottom of the drum) is still located in the lower mold 3. At this time, the adhesion between the product (i.e., the washing machine drum 1) and the mold is relatively small, and the staff can forcibly remove it, but there is still a certain inconvenience.

[0036] Therefore, in order to solve the above technical problems, in one embodiment of the present application, Figure 7 and Fig.12 As shown, a pin assembly 10 can be elastically slidably arranged in the lower mold 3 by a spring. It is understandable that when the mold is opened, the lower mold 3 is separated from the upper mold 2, and then the pin assembly 10 can eject the washing machine drum 1 and separate from the lower mold 3 under the action of elastic force.

[0037] It should be known that the ejector assembly 10 in the present application is different from the conventional ejector mechanism. The conventional ejector mechanism requires a hydraulic cylinder as a driving source to be driven, while the ejector assembly 10 in the present application uses the elastic force of a spring as a driving source, which has the advantage of not requiring an external power source, simplifying the mold structure, and reducing production costs. At the same time, the elastic force of the spring enables the ejector assembly 10 to evenly and stably eject the washing machine drum 1 from the lower mold 3, and its ejection force is also "flexible", avoiding product deformation or damage caused by uneven ejection force or excessive force.

[0038] Specifically, Fig.12 As shown, the ejector assembly 10 includes an ejector plate 1001 and a plurality of ejector posts 1002 . The ejector plate 1001 is vertically slidably mounted on the lower mold 3 via an elastic member (such as a spring), and the ejector posts 1002 are vertically mounted on the ejector plate 1001 .

[0039] It is understandable that before the mold is opened, the ejector plate 1001 cooperates with the upper mold 2, that is, the upper mold 2 will exert an extrusion force on the ejector plate 1001, and then the spring is in a compressed energy storage state, so that the ejector column 1002 will not interfere with the molding of the product. When the mold is opened, the upper mold 2 is separated from the ejector plate 1001, such as Fig.12As shown, at this time, the ejector plate 1001 will drive the ejector column 1002 to move upward under the action of the spring, thereby ejecting the washing machine drum 1 in the lower mold 3. It should be noted that, since only the bottom of the product is located in the lower mold 3 at this time, as long as the elastic force of the spring is set large enough, the product can be ejected smoothly.

[0040] In one of the embodiments of the present application, Figure 5 and Figure 6 As shown, the driving device 4 is obliquely installed on the external molding component 6, and the external molding component 6 is obliquely slidably set on the upper mold 2. The guide structure 5 includes an oblique guide column 501 and an oblique guide groove 502. The oblique guide column 501 is installed on the lower mold 3, and the oblique guide groove 502 is set on the external molding component 6. The oblique guide groove 502 is obliquely slidably matched with the oblique guide column 501.

[0041] It is understandable that if Figure 6 As shown, we take the driving device 4 on the right side as an example. When opening the mold, the driving device 4 extends in the direction of a (that is, extends obliquely to the upper left), thereby causing the lower mold 3 to move vertically upward, and the inclined guide column 501 moves upward under the action of the lower mold 3. The inclined guide column 501 acts on the inclined guide groove 502, thereby causing the outer molding component 6 to slide in the direction of b (that is, slides obliquely to the upper right along the upper mold 2). Therefore, the outer molding component 6 will have two directions of displacement: horizontal displacement and vertical displacement. At the beginning of the activity of the outer molding component 6: At this time, the outer molding component 6 cooperates with the ribs 101 on the outside of the washing machine drum 1, so that the outer molding component 6 can drive the formed washing machine drum 1 to separate from the inner molding component 8. At this time, the demoulding of the washing machine drum 1 and the inner molding component 8 is mainly achieved through the vertical displacement of the outer molding component 6; of course, the horizontal displacement of the outer molding component 6 is to achieve demoulding from the outside of the washing machine drum 1, and in the initial state, although the outer molding component 6 also has displacement in the horizontal position, the outer molding component 6 and the ribs 101 are still in a cooperative state. After the outer molding component 6 moves upward for a distance, the outer molding component 6 will be completely separated from the washing machine drum 1, thereby realizing the demoulding process of the outer molding component 6 and the inner molding component 8.

[0042] It should be noted that when the driving device 4 is extended to the upper left and tilted so that the lower mold 3 moves upward, since the lower mold 3 can only move vertically upward, the driving device 4 needs to have a horizontal displacement to the right to avoid it. The driving device 4 is installed obliquely on the outer molding component 6. Under the action of the guide structure 5, the outer molding component 6 can slide obliquely to the upper right along the upper mold 2, thereby giving the driving device 4 a horizontal displacement to the right, so the operation of the driving device 4 will not be interfered with.

[0043] Further, such as Figure 4As shown, the outer molding components 6 are preferably provided in four groups, which are located at the four sides of the washing machine drum 1; Figure 5 As shown, the driving device 4 is preferably provided with two groups and arranged oppositely, that is, the driving device 4 is installed on two opposite outer molding components 6, so that when demoulding, the outer molding component 6 can act on the washing machine drum 1 more evenly to ensure the stability of the demoulding process. The symmetrical design of the two groups of driving devices 4 not only improves the demoulding efficiency, but also enhances the stability and reliability of the overall structure.

[0044] In one of the embodiments of the present application, Figure 4 As shown, adjacent outer molding components 6 can be coordinated through a synchronization structure 7. We know that although the outer molding components 6 can be synchronized by the guide structure 5, there may be errors between each guide structure 5, which makes the demoulding process of the four outer molding components 6 have a sequence, and the force of the product is uneven. Under the action of the synchronization structure 7, multiple outer molding components 6 can be synchronized during demoulding, thereby ensuring that the washing machine drum 1 is evenly stressed during the demoulding process, avoiding deformation or damage caused by uneven force.

[0045] As a further description of the above embodiment: Figure 8 As shown, the synchronization structure 7 includes a synchronization bar 701. One end of the synchronization bar 701 is detachably mounted on one of the outer molding components 6, for example, by bolts; and the other end of the synchronization bar 701 is engaged with the adjacent outer molding component 6. In other words, when the four outer molding components 6 move upward synchronously, their heights in the vertical direction are consistent, but the movement of each outer molding component 6 in the horizontal direction is independent and will not interfere with each other, that is, the four outer molding components 6 will slide away from each other and be demolded under the action of the synchronization bar 701.

[0046] like Figure 1 As shown, there are many ribs 101 on the outside of the washing machine drum 1, and different ribs 101 have different extension lengths in the horizontal direction. We set the ribs 101 with longer lengths as deep ribs 101, and the ribs 101 with shorter lengths as shallow ribs 101. We know that the outer molding component 6 is demoulded by moving upward in an inclined manner, so for the deep ribs 101, the outer molding component 6 needs to have a sufficient stroke, so that the horizontal displacement of the outer molding component 6 can be carried out for the demoulding process; but in fact, the inclined sliding stroke of the outer molding component 6 will not be too large, otherwise the volume of the entire mold will be too large.

[0047] Therefore, in order to solve the problem that the outer molding component 6 can be smoothly demoulded from the deep rib 101, in one embodiment of the present application, Figures 8 to 11As shown, a demoulding mechanism 9 may be provided on the outer molding component 6. Therefore, during demoulding, the demoulding mechanism 9 may be separated from the deep ribs 101 on the side of the washing machine drum 1, so that the outer molding component 6 and the demoulding mechanism 9 can be separated from each other without changing the stroke of the outer molding component 6.

[0048] Of course, there are many structural forms of the demoulding mechanism 9, including but not limited to the following three: Structure 1: Figure 8 and Fig. 9 As shown, the demoulding mechanism 9 includes a driving component 901 and a molding component 902 . The driving component 901 is installed on the outer molding component 6 and the output end is connected to the molding component 902 . The molding component 902 is used to mold the deep ribs 101 .

[0049] It is understandable that, during demoulding, the driving component 901 can drive the molded part 902 to move and disengage from the deep rib 101 on the side of the washing machine drum 1. In other words, a demoulding mechanism 9 with a driving source is separately installed on the outer molding component 6 to demould the deep rib 101.

[0050] Structure 2: Fig.10 and Fig.11 As shown, the demoulding mechanism 9 includes a molding component 902, and the molding component 902 is elastically slidably mounted on the outer molding component 6 through a spring.

[0051] It is understandable that the molded part 902 corresponding to the deep rib 101 is mainly close to the bottom of the outer molded component 6, that is, the position of the washing machine drum 1 close to the opening; we know that the bottom of the outer molded component 6 and the upper mold 2 are inclined and slide, so the matching connection between the two is not suitable for installing the driving component 901, that is, it is not suitable to adopt the method of structure 1. Fig.11 As shown, the molded part 902 is installed in the outer mold component 6 in a spring elastic sliding manner. Before demoulding, the molded part 902 will cooperate with the mold cavity under the extrusion of the inclined surface of the upper mold 2, and then participate in the molding process of the deep rib 101. At this time, the spring is in a compressed energy storage state. During demoulding, when the outer mold component 6 tilts and slides and causes the molded part 902 to be misaligned with the inclined surface of the upper mold 2, the molded part 902 will move away from the deep rib 101 under the elastic force of the spring, and until it is separated from the deep rib 101, thereby completing the separation process.

[0052] Structure 3: It is a combination of Structure 1 and Structure 2, that is, it is actually set according to the specific rib position 101 on the outer side of the washing machine drum 1, and the two are used in combination to achieve the best demoulding effect.

[0053] It should be noted that all three structures can meet actual needs, and those skilled in the art can set them according to actual conditions. The specific structure and working principle of the above-mentioned drive device 4 and drive component 901 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here; common ones include hydraulic cylinders, pneumatic cylinders, and linear motors, etc., and hydraulic cylinders are preferably used in this application.

[0054] The working principle of the present invention is: It should be noted that when actually opening the mold, Figure 2 As shown, the upper mold 2 is on the top and the lower mold 3 is on the bottom. The state after the mold is opened is as follows Figure 7 For the convenience of description and our habitual way of looking at pictures, the mold is turned upside down here, as shown in Figure 5 and Figure 6 As shown, the working principle is described in a manner that the lower mold 3 is on top and the upper mold 2 is on the bottom. Of course, the above process is also described in this manner.

[0055] In the initial state before mold opening, such as Figure 5 When opening the mold, Figure 6 As shown, the driving device 4 is extended, so that the lower mold 3 is displaced vertically upward, and the outer molding component 6 will slide upward with the cooperation of the inclined guide column 501 and the inclined guide groove 502, and the outer molding component 6 will cooperate with the rib position 101 on the outside of the washing machine drum 1, so that the outer molding component 6 can drive the formed washing machine drum 1 to separate from the inner molding component 8 through the rib position 101, and then the outer molding component 6 continues to move upward, and can be demoulded from the outside of the washing machine drum 1 under the action of the horizontal displacement of the outer molding component 6; of course, during demoulding, the demoulding mechanism 9 on the outer molding component 6 can achieve separation and demoulding from the deep rib position 101.

[0056] After the outer molding component 6 and the inner molding component 8 are separated from the formed washing machine drum 1, the upper mold 2 is completely separated from the lower mold 3. Figure 7 As shown, at this time, the formed washing machine drum 1 will be located in the lower mold 3 and at the center of the four outer molding components 6, and the ejector plate 1001 will drive the ejector column 1002 to move upward under the action of the spring, thereby ejecting the washing machine drum 1 in the lower mold 3, so that the formed washing machine drum 1 will be completely separated from the mold. At this time, the formed washing machine drum 1 can be taken out by a robot or a staff.

[0057] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. An injection mold for a washing machine drum, characterized in that: include: An upper mold, a lower mold, a driving device, a guide structure, an inner molding component and a plurality of outer molding components, wherein the upper mold, the lower mold, the inner molding component and the outer molding component are used to mold a cavity of a washing machine drum, wherein the inner molding component is installed on the upper mold and is used to mold the inner side of the washing machine drum, and the outer molding component is used to mold the outer side of the washing machine drum, the outer molding component is movably arranged on the upper mold and cooperates with the lower mold through the guide structure, and the driving device is installed on the outer molding component and the output end is connected to the lower mold; When opening the mold, the driving device is suitable for driving the lower mold to move upward and away from the upper mold, and then the outer molding component is suitable for moving upward and away from the upper mold under the action of the guide structure, so that the outer molding component drives the washing machine drum to move upward and disengage from the inner molding component through the ribs on the side of the washing machine drum, and at the same time, the outer molding component moves away from the washing machine drum until the outer molding component is disengaged from the molded washing machine drum.

2. The injection mold for the washing machine drum according to claim 1, characterized in that: An ejector assembly is elastically and slidably arranged in the lower mold; when the mold is opened, the lower mold is separated from the upper mold, and then the ejector assembly is suitable for ejecting the washing machine drum under the action of elastic force and separating it from the lower mold.

3. The injection mold for the washing machine drum according to claim 2, characterized in that: The ejector assembly includes an ejector plate and a plurality of ejector columns, wherein the ejector plate is vertically slidably mounted on the lower mold via an elastic member, and the ejector column is vertically mounted on the ejector plate; before the mold is opened, the ejector plate cooperates with the upper mold, so that the elastic member is in a compressed energy storage state; when the mold is opened, the upper mold is separated from the ejector plate, so that the ejector plate is suitable for driving the ejector column to eject the washing machine drum in the lower mold under the action of the elastic member.

4. The injection mold for a washing machine drum according to claim 1 or 2, characterized in that: The driving device is obliquely installed on the outer molding component, and the outer molding component is obliquely slidably set on the upper mold. The guide structure includes an oblique guide column and an oblique guide groove. The oblique guide column is installed on the lower mold, and the oblique guide groove is set on the outer molding component. The oblique guide groove is obliquely slidably matched with the oblique guide column.

5. The injection mold for the washing machine drum as claimed in claim 4, characterized in that: Adjacent outer molding components are matched through a synchronous structure; when opening the mold, the plurality of outer molding components are suitable for performing synchronous activities driven by the synchronous structure.

6. The injection mold for the washing machine drum according to claim 5, characterized in that: The synchronization structure comprises a synchronization bar; one end of the synchronization bar is detachably mounted on one of the outer molding components, and the other end of the synchronization bar is snap-fitted with the adjacent outer molding component.

7. The injection mold for a washing machine drum as claimed in claim 1, characterized in that: The outer molding component is provided with a demoulding mechanism; when demoulding, the demoulding mechanism is suitable for being separated from the deep ribs on the side of the washing machine drum.

8. The injection mold for the washing machine drum according to claim 7, characterized in that: The demoulding mechanism includes a driving component and a molding component. The driving component is installed on the outer molding component and the output end is connected to the molding component. When demoulding, the driving component is suitable for driving the molding component to move and disengage from the deep ribs on the side of the washing machine drum.

9. The injection mold for a washing machine drum according to claim 7 or 8, characterized in that: The demoulding mechanism includes a molding part, which is elastically slidably mounted on the outer molding component; when demoulding, the outer molding component is separated from the upper mold, and then the molding part is separated from the deep ribs on the side of the washing machine drum under the action of elastic force.

10. The injection mold for a washing machine drum as claimed in claim 1, characterized in that: The outer molding components are provided in four groups and are located at the four sides of the washing machine drum body, and the driving devices are provided in two groups and are arranged opposite to each other.

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