Closestool inner container forming mold convenient to demold

Abstract

The utility model provides a closestool liner forming mould convenient to demould, which comprises a bottom mould, a left mould, a right mould, a lifting mechanism and a mould opening and closing driving mechanism, the bottom mould is arranged at the lower part of the lifting mechanism, and the left mould and the right mould are movably arranged above the bottom mould. A cavity used for forming the closestool inner container is formed among the bottom mold, the left mold and the right mold; the mold opening and closing driving mechanism is arranged outside the left mold and the right mold, the left mold and the right mold are both connected with the mold opening and closing driving mechanism, and the mold opening and closing driving mechanism drives the left mold and the right mold to perform mold opening and closing operation; the mold opening and closing driving mechanism is connected with the upper portion of the lifting mechanism, and the lifting mechanism drives the mold opening and closing driving mechanism, the left mold and the right mold to do lifting motion. The forming mold has the advantages that the whole forming mold is a three-section mold, the structure is simple, meanwhile, the demolding process is very simple and convenient, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of toilet molding, in particular to a toilet inner tank molding die which is convenient for demolding.

Background Art

[0002] A toilet, also known as a sitting toilet, belongs to a sanitary appliance in the field of building water supply and drainage materials. When in use, it is characterized by the sitting position of the human body. According to the flushing method, it can be divided into a direct flushing type and a siphon type. Generally, a toilet includes an inner tank and an outer shell. In some manufacturing processes, the toilet is integrally formed by high-pressure grouting. For example, a siphon toilet with a detachable elbow disclosed in the Chinese utility model patent with the application number CN202120830477.8 is manufactured by an integrally formed method. Of course, for more convenient manufacturing, some manufacturing processes will use high-pressure grouting to form the inner tank and the outer shell respectively, then sleuth the formed inner tank into the outer shell, and bond the inner tank and the outer shell together to form a toilet. However, the existing die structure for forming a toilet is relatively complex and inconvenient for demolding. Therefore, there is an urgent need to provide a toilet inner tank molding die with a simple structure and convenient demolding.

Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a toilet inner tank molding die which is convenient for demolding, and solve the problems that the existing die for forming a toilet has a relatively complex structure and is inconvenient for demolding.

[0004] The utility model is realized as follows: A toilet inner tank molding die which is convenient for demolding includes a bottom die, a left die, a right die, a lifting mechanism and a mold opening and closing driving mechanism. The bottom die is arranged at the lower part of the lifting mechanism. The left die and the right die are movably arranged above the bottom die. A cavity for forming a toilet inner tank is formed among the bottom die, the left die and the right die. The mold opening and closing driving mechanism is arranged outside the left die and the right die. The left die and the right die are both connected to the mold opening and closing driving mechanism. The mold opening and closing driving mechanism drives the left die and the right die to perform mold opening and closing operations. The mold opening and closing driving mechanism is connected to the upper part of the lifting mechanism. The lifting mechanism drives the mold opening and closing driving mechanism, the left die and the right die to perform lifting movements.

[0005] Further, the mold opening and closing driving mechanism includes an outer frame body, a first driving cylinder, a second driving cylinder and a connecting rod.

[0006] The outer frame is sleeved outside the left mold and the right mold, and there is a gap between the outer frame and the outer walls of the left mold and the right mold; the first driving cylinder is arranged on the left side of the outer frame, and the movable end of the first driving cylinder is connected to the left mold through a first connecting plate; the second driving cylinder is arranged on the right side of the outer frame, and the movable end of the second driving cylinder is connected to the right mold through a second connecting plate; the connecting rod is connected between the outer frame and the lifting mechanism.

[0007] Further, a first assembly groove is formed on the left side of the outer frame, and first driving cylinders are arranged at positions corresponding to both ends of the left mold on the left side of the outer frame. The movable end of each first driving cylinder passes through the first assembly groove and is connected to the first connecting plate; a second assembly groove is formed on the right side of the outer frame, and second driving cylinders are arranged at positions corresponding to both ends of the right mold on the right side of the outer frame. The movable end of each second driving cylinder passes through the second assembly groove and is connected to the second connecting plate.

[0008] Further, the lifting mechanism includes an upper support seat, a lower support seat, a connecting column body connected between the upper support seat and the lower support seat, a third driving cylinder, and a pressing plate; the bottom mold is arranged on the top of the lower support seat; the pressing plate is slidably connected to each connecting column body, the pressing plate is connected to the mold opening and closing driving mechanism, and the lower surface of the pressing plate is attached to the upper surfaces of the left mold and the right mold; the third driving cylinder is vertically installed on the upper support seat, and the movable end of the third driving cylinder is connected to the pressing plate.

[0009] Further, the connecting column bodies are arranged at four corner positions between the upper support seat and the lower support seat.

[0010] Further, the lifting mechanism further includes a nut member. A threaded section is formed at the lower end of the connecting column body, and the threaded section passes through the lower support seat and is screwed with the nut member.

[0011] Further, it further includes a machine frame and a swinging mechanism; the lifting mechanism is connected to the machine frame through the swinging mechanism, and the bottom mold, the left mold, the right mold, the lifting mechanism, and the mold opening and closing driving mechanism are driven by the swinging mechanism to swing by a required angle.

[0012] Further, the swinging mechanism includes a fourth driving cylinder, a rotating shaft, and a bearing seat; the bearing seat is fixed on the top of the machine frame, and the left and right sides of the upper support seat are rotatably connected to the bearing seat through the rotating shaft; the fourth driving cylinder is inclined, and the upper end of the fourth driving cylinder is hinged to the lower support seat, and the lower end of the fourth driving cylinder is hinged to the machine frame.

[0013] Furthermore, the frame includes four supporting columns, a first connecting beam and a second connecting beam; the lower ends of the four supporting columns are connected together in sequence through the four first connecting beams, and the upper ends of the four supporting columns are connected together in sequence through the three second connecting beams, and a swinging opening is formed between two supporting columns that are not connected by the second connecting beam.

[0014] By adopting the technical solution of the utility model, at least the following beneficial effects are achieved:

[0015] 1. The molding mold is designed to include a bottom mold, a left mold and a right mold that can be molded together to form a cavity. The entire molding mold is a three-petal mold with a simple structure. At the same time, when demolding, it is only necessary to use the lifting mechanism to first drive the mold opening and closing driving mechanism, the left mold and the right mold to rise to the required position together, and then drive the left mold and the right mold to open the mold through the mold opening and closing driving mechanism, so that the entire demolding operation can be realized. The demolding process is very simple and convenient, which helps to improve production efficiency.

[0016] 2. A first assembly groove and a second assembly groove are respectively arranged on the left and right sides of the outer frame, and two first drive cylinders are arranged on the left side of the outer frame, and two second drive cylinders are arranged on the right side of the outer frame. In this way, during specific use, not only can the left mold and the right mold be driven to open and close the mold more reliably and stably, but the arrangement of the first assembly groove and the second assembly groove also facilitates the adjustment of the positions of the first drive cylinder and the second drive cylinder.

[0017] 3. The lower end of the connecting column is designed with a threaded section, and the threaded section passes through the lower support seat and is screwed to the nut, so that the bottom mold can be easily disassembled, replaced, maintained, etc. during specific use.

[0018] 4. The molding mold is designed to also include a frame and a swinging mechanism, and the lifting mechanism is connected to the frame through the swinging mechanism, so that when used specifically, the swinging mechanism can be used to drive the bottom mold, the left mold, the right mold, the lifting mechanism and the opening and closing mold driving mechanism to swing to the required angle together, so that grouting can be conveniently performed from the lower end into the cavity to better mold the toilet liner.

Brief Description of the Drawings

[0019] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0020] Figure 1 This is the overall structural diagram of a toilet liner molding mold that is easy to demould in the utility model;

[0021] Figure 2 yes Figure 1 Left view of

[0022] Figure 3It is a structural diagram of a toilet inner tank forming mold facilitating demolding of the present utility model after removing the frame;

[0023] Figure 4 It is an exploded view of the mold opening and closing drive mechanism, bottom mold, left mold and right mold in the present utility model.

[0024] Explanation of reference numerals in the drawings:

[0025] Forming mold 100;

[0026] Bottom mold 1, bottom template 11, core 12, vertical wall surface 121;

[0027] Left mold 2;

[0028] Right mold 3;

[0029] Lifting mechanism 4, upper support seat 41, lower support seat 42, connecting column body 43, third driving cylinder 44, pressing plate 45, nut member 46;

[0030] Mold opening and closing drive mechanism 5, outer frame body 51, first assembly groove 511, second assembly groove 512, first driving cylinder 52, second driving cylinder 53, connecting rod 54, first connecting plate 55, second connecting plate 56;

[0031] Frame 6, support column 61, first connecting beam 62, second connecting beam 63;

[0032] Swing mechanism 7, fourth driving cylinder 71, rotating shaft 72, bearing seat 73.

Detailed implementation manners

[0033] In order to better understand the technical solution of the present utility model, the technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0034] It should be noted here that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing these implementation manners and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0035] Please refer to Figures 1 to 4As shown in the figure, a forming mold 100 for a toilet inner tank that is easy to demold according to the present utility model includes a bottom mold 1, a left mold 2, a right mold 3, a lifting mechanism 4, and a mold opening and closing driving mechanism 5. The bottom mold 1 is arranged at the lower part of the lifting mechanism 4. The left mold 2 and the right mold 3 are movably arranged above the bottom mold 1, so that the left mold 2 and the right mold 3 can move relative to the bottom mold 1 to achieve the demolding function. A cavity for forming the toilet inner tank is formed between the bottom mold 1, the left mold 2, and the right mold 3, so as to form the toilet inner tank through the cavity. The mold opening and closing driving mechanism 5 is arranged outside the left mold 2 and the right mold 3. The left mold 2 and the right mold 3 are both connected to the mold opening and closing driving mechanism 5. The mold opening and closing driving mechanism 5 drives the left mold 2 and the right mold 3 to perform mold opening and closing operations. The mold opening and closing driving mechanism 5 is connected to the upper part of the lifting mechanism 4. The lifting mechanism 4 drives the mold opening and closing driving mechanism 5, the left mold 2, and the right mold 3 to perform lifting movements.

[0036] When the forming mold 100 of the present utility model is specifically used, the mold opening and closing driving mechanism 5 can be used to drive the left mold 2 and the right mold 3 to close the mold, so that a cavity for forming the toilet inner tank is formed between the bottom mold 1, the left mold 2, and the right mold 3. After the toilet inner tank is formed in the cavity, the lifting mechanism 4 can be used to drive the mold opening and closing driving mechanism 5, the left mold 2, and the right mold 3 to rise together, so that the bottom mold 1 is demolded from the formed toilet inner tank. Then, the mold opening and closing driving mechanism 5 is used to drive the left mold 2 and the right mold 3 to open the mold, so as to demold the entire toilet inner tank. After the demolding is completed, the lifting mechanism 4 can be used to drive the mold opening and closing driving mechanism 5, the left mold 2, and the right mold 3 to descend to the required position together, so that the bottom mold 1, the left mold 2, and the right mold 3 can close the mold to continue production.

[0037] By designing the forming mold 100 of the present utility model to include a bottom mold 1, a left mold 2, and a right mold 3 that can close the mold to form a cavity, the entire forming mold 100 is a three-piece mold, and the structure is simple. At the same time, during demolding, only the lifting mechanism 4 needs to be used to first drive the mold opening and closing driving mechanism 5, the left mold 2, and the right mold 3 to rise to the required position, and then the mold opening and closing driving mechanism 5 is used to drive the left mold 2 and the right mold 3 to open the mold, so as to realize the entire demolding operation. The demolding process is very simple and convenient, which helps to improve production efficiency.

[0038] In some embodiments of the present utility model, in order to perform mold opening and closing operations on the left mold 2 and the right mold 3, and enable the lifting mechanism 4 to drive the entire mold opening and closing driving mechanism 5 to perform lifting movements together, please refer to Figure 4 As shown in the figure, the mold opening and closing driving mechanism 5 includes an outer frame body 51, a first driving cylinder 52, a second driving cylinder 53, and a connecting rod 54.

[0039] The outer frame body 51 is sleeved outside the left mold 2 and the right mold 3, and a spacing is left between the outer frame body 51 and the outer walls of the left mold 2 and the right mold 3 to drive the left mold 2 and the right mold 3 to perform mold opening and closing operations by using this spacing; the first driving cylinder 52 is arranged on the left side of the outer frame body 51, and the movable end of the first driving cylinder 52 is connected to the left mold 2 through a first connecting plate 55; the second driving cylinder 53 is arranged on the right side of the outer frame body 51, and the movable end of the second driving cylinder 53 is connected to the right mold 3 through a second connecting plate 56; the connecting rod 54 is connected between the outer frame body 51 and the lifting mechanism 4 to connect the lifting mechanism 4 and the mold opening and closing driving mechanism 5 together. As a specific implementation manner of the present invention, both the first driving cylinder 52 and the second driving cylinder 53 can adopt driving oil cylinders.

[0040] More specifically, a first assembly groove 511 is formed on the left side of the outer frame body 51, and two first driving cylinders 52 are arranged on the left side of the outer frame body 51 at positions corresponding to both ends of the left mold 2. The movable end of each first driving cylinder 52 passes through the first assembly groove 511 and is connected to the first connecting plate 55; a second assembly groove 512 is formed on the right side of the outer frame body 51, and two second driving cylinders 53 are arranged on the right side of the outer frame body 51 at positions corresponding to both ends of the right mold 3. The movable end of each second driving cylinder 53 passes through the second assembly groove 512 and is connected to the second connecting plate 56. Among them, both the first assembly groove 511 and the second assembly groove 512 are in a strip-shaped structure.

[0041] The present invention adopts the first assembly groove 511 and the second assembly groove 512 are respectively arranged on the left and right sides of the outer frame body 51, and two first driving cylinders 52 are arranged on the left side of the outer frame body 51, and two second driving cylinders 53 are arranged on the right side of the outer frame body 51. In the specific use process, it can not only drive the left mold 2 and the right mold 3 to perform mold opening and closing operations more reliably and stably, but also the settings of the first assembly groove 511 and the second assembly groove 512 are convenient for adjusting the positions of the first driving cylinder 52 and the second driving cylinder 53.

[0042] In some embodiments of the present invention, the lifting mechanism 4 includes an upper support seat 41, a lower support seat 42, a connecting column body 43 connected between the upper support seat 41 and the lower support seat 42, a third driving cylinder 44, and a pressing plate 45;

[0043] The bottom mold 1 is arranged on the top of the lower support base 42. Specifically, the bottom mold 1 can be arranged at the middle position on the top of the lower support base 42 to utilize the lower support base 42 to support the bottom mold 1; the pressing plate 45 is slidably connected to each connecting column body 43, enabling the pressing plate 45 to slide up and down relative to the connecting column body 43. The pressing plate 45 is connected to the mold opening and closing driving mechanism 5, and the lower surface of the pressing plate 45 is in contact with the upper surfaces of the left mold 2 and the right mold 3. In this way, the pressing plate 45 can not only drive the mold opening and closing driving mechanism 5, the left mold 2, and the right mold 3 to move up and down together, but also use the pressing plate 45 to exert a certain downward pressure on the left mold 2 and the right mold 3; the third driving cylinder 44 is vertically installed on the upper support base 41, and the movable end of the third driving cylinder 44 is connected to the pressing plate 45 to utilize the third driving cylinder 44 to drive the pressing plate 45 to move up and down.

[0044] In the specific implementation of the present utility model, the pressing plate 45 is connected to the connecting rod 54 of the mold opening and closing driving mechanism 5, and an elastic member (not shown) can be arranged between the upper end of the connecting rod 54 and the pressing plate 45, enabling the pressing plate 45 to float slightly relative to the connecting rod 54, so as to better utilize the pressing plate 45 to exert a downward pressure on the left mold 2 and the right mold 3; the third driving cylinder 44 can adopt a driving oil cylinder.

[0045] More specifically, the connecting column bodies 43 are arranged at the four corner positions between the upper support base 41 and the lower support base 42, enabling the entire mold opening and closing driving mechanism 5, the left mold 2, and the right mold 3 to lift and lower more stably.

[0046] More specifically, the lifting mechanism 4 further includes a nut member 46. A threaded section (not shown) is formed at the lower end of the connecting column body 43, and the threaded section passes through the lower support base 42 and is screwed with the nut member 46.

[0047] By designing that the lower end of the connecting column body 43 has a threaded section, and passing the threaded section through the lower support base 42 and screwing it with the nut member 46, the present utility model enables convenient disassembly, replacement, maintenance, etc. of the bottom mold 1 during specific use.

[0048] In some embodiments of the present utility model, the molding die 100 further includes a frame 6 and a swing mechanism 7; the lifting mechanism 4 is connected to the frame 6 through the swing mechanism 7, and the bottom mold 1, the left mold 2, the right mold 3, the lifting mechanism 4, and the mold opening and closing driving mechanism 5 are driven by the swing mechanism 7 to swing by a required angle. In the specific implementation of the present utility model, the grouting port can be arranged on the side wall or the edge of the bottom of the bottom mold. In this way, after tilting the bottom mold 1, the left mold 2, and the right mold 3 after mold closing by a required angle, the grouting port can be in the low position.

[0049] The utility model designs the molding mold 100 to also include a frame 6 and a swing mechanism 7, and connects the lifting mechanism 4 to the frame 6 through the swing mechanism 7, so that when used, the swing mechanism 7 can be used to drive the bottom mold 1, the left mold 2, the right mold 3, the lifting mechanism 4 and the opening and closing mold driving mechanism 5 to swing to a desired angle, so that grouting can be easily performed from the lower end into the cavity to better mold the toilet liner.

[0050] More specifically, in order to enable the swing mechanism 7 to drive the bottom mold 1, the left mold 2, the right mold 3, the lifting mechanism 4 and the opening and closing mold driving mechanism 5 to swing together as a whole, the swing mechanism 7 includes a fourth driving cylinder 71, a rotating shaft 72 and a bearing seat 73; the bearing seat 73 is fixed to the top of the frame 6, and the left and right sides of the upper support seat 41 are rotatably connected to the bearing seat 73 through the rotating shaft 72, so that the entire lifting mechanism 4 can rotate relative to the frame 6; the fourth driving cylinder 71 is tilted, and the upper end of the fourth driving cylinder 71 is hinged to the lower support seat 42, and the lower end of the fourth driving cylinder 71 is hinged to the frame 6. As a specific embodiment of the utility model, the fourth driving cylinder 71 can be a driving oil cylinder.

[0051] In some embodiments of the utility model, the frame 6 includes four supporting columns 61, a first connecting beam 62 and a second connecting beam 63; the lower ends of the four supporting columns 61 are connected together in sequence through the four first connecting beams 62, and the upper ends of the four supporting columns 61 are connected together in sequence through the three second connecting beams 63, and a swinging clearance opening is formed between two supporting columns 61 that are not connected by the second connecting beam 63, and the swinging clearance opening is used to give way to the swing of the bottom mold 1, the left mold 2, the right mold 3, the lifting mechanism 4 and the opening and closing mold driving mechanism 5.

[0052] When implementing this utility model, please refer to Figure 4 As shown, the bottom mold 1 includes a bottom mold plate 11 and a core 12 disposed on the bottom mold plate 11, and a vertical wall 121 is formed at the lower portion of the core 12 (i.e., one end close to the bottom mold plate 11) to ensure that the bottom mold 1 can be demolded smoothly. Because the lower portion of the traditional core usually protrudes outward to form a convex ring to form a concave ring on the inner wall of the toilet tank, this design makes demolding more difficult and greatly increases the structural complexity of the mold; for this reason, the lower portion of the core 12 of the utility model is designed to be a vertical wall 121, so that molding and rapid demolding can be well achieved through a three-petal mold.

[0053] Although the specific embodiments of the present utility model have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative only and not used to limit the scope of the present utility model. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present utility model should all be covered within the scope protected by the claims of the present utility model.

Claims

1. A toilet liner forming mold that is easy to demould, characterized in that: It includes a bottom mold, a left mold, a right mold, a lifting mechanism and a mold opening and closing driving mechanism, the bottom mold is arranged at the lower part of the lifting mechanism, the left mold and the right mold are movably arranged above the bottom mold, and a cavity for molding a toilet liner is formed between the bottom mold, the left mold and the right mold; the mold opening and closing driving mechanism is arranged on the outside of the left mold and the right mold, the left mold and the right mold are both connected to the mold opening and closing driving mechanism, and the left mold and the right mold are driven by the mold opening and closing driving mechanism to perform mold opening and closing operations; the mold opening and closing driving mechanism is connected to the upper part of the lifting mechanism, and the mold opening and closing driving mechanism, the left mold and the right mold are driven by the lifting mechanism to perform lifting and lowering movements.

2. A toilet liner forming mold that is easy to demould as claimed in claim 1, characterized in that: The mold opening and closing driving mechanism comprises an outer frame, a first driving cylinder, a second driving cylinder and a connecting rod; The outer frame is sleeved on the outside of the left mold and the right mold, and a distance is left between the outer frame and the outer walls of the left mold and the right mold; the first driving cylinder is arranged on the left side of the outer frame, and the movable end of the first driving cylinder is connected to the left mold through a first connecting plate; the second driving cylinder is arranged on the right side of the outer frame, and the movable end of the second driving cylinder is connected to the right mold through a second connecting plate; the connecting rod is connected between the outer frame and the lifting mechanism.

3. A toilet liner forming mold that is easy to demould as claimed in claim 2, characterized in that: A first assembly groove is formed on the left side of the outer frame, and first driving cylinders are arranged on the left side of the outer frame at positions corresponding to the two ends of the left mold, and the movable end of each of the first driving cylinders passes through the first assembly groove and is connected to the first connecting plate; a second assembly groove is formed on the right side of the outer frame, and second driving cylinders are arranged on the right side of the outer frame at positions corresponding to the two ends of the right mold, and the movable end of each of the second driving cylinders passes through the second assembly groove and is connected to the second connecting plate.

4. A toilet liner forming mold that is easy to demould as claimed in claim 1, characterized in that: The lifting mechanism includes an upper support seat, a lower support seat, a connecting column connected between the upper support seat and the lower support seat, a third driving cylinder and a pressing plate; the bottom mold is arranged on the top of the lower support seat; the pressing plate is slidably connected to each connecting column, the pressing plate is connected to the opening and closing mold driving mechanism, and the lower surface of the pressing plate is in contact with the upper surfaces of the left mold and the right mold; the third driving cylinder is vertically installed on the upper support seat, and the movable end of the third driving cylinder is connected to the pressing plate.

5. A toilet liner forming mold that is easy to demould as claimed in claim 4, characterized in that: The connecting columns are arranged at four corners between the upper supporting seat and the lower supporting seat.

6. A toilet liner forming mold that is easy to demould as claimed in claim 4, characterized in that: The lifting mechanism also includes a nut member. A threaded section is formed at the lower end of the connecting column. The threaded section passes through the lower support seat and is threadedly connected to the nut member.

7. A toilet liner forming mold that is easy to demould as claimed in claim 4, characterized in that: It also includes a frame and a swing mechanism; the lifting mechanism is connected to the frame through the swing mechanism, and the swing mechanism drives the bottom mold, left mold, right mold, lifting mechanism and mold opening and closing drive mechanism to swing to a required angle together.

8. A toilet liner forming mold that is easy to demould according to claim 7, characterized in that: The swing mechanism includes a fourth drive cylinder, a rotating shaft and a bearing seat; the bearing seat is fixed on the top of the frame, and the left and right sides of the upper support seat are rotatably connected to the bearing seat through the rotating shaft; the fourth drive cylinder is tilted, and the upper end of the fourth drive cylinder is hinged to the lower support seat, and the lower end of the fourth drive cylinder is hinged to the frame.

9. A toilet liner forming mold that is easy to demould according to claim 7, characterized in that: The frame includes four supporting columns, a first connecting beam and a second connecting beam; the lower ends of the four supporting columns are connected together in sequence through the four first connecting beams, and the upper ends of the four supporting columns are connected together in sequence through the three second connecting beams, and a swinging opening is formed between two supporting columns that are not connected by the second connecting beam.

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