Rotary demolding mechanism

Abstract

The rotary demolding mechanism comprises an upper mold, a lower mold, an inner forming assembly, an outer forming assembly and a demolding mechanism body, and the upper mold, the lower mold, the inner forming assembly and the outer forming assembly are matched with one another to form a mold cavity used for forming a needed oil tank cover; wherein the inner forming assembly is rotationally installed on the lower mold and used for forming an arc-shaped inner buckle of the oil tank cover, the outer forming assembly is rotationally installed on the lower mold and used for forming an arc-shaped outer buckle of the oil tank cover, and the demolding mechanism is installed on the lower mold and connected with the inner forming assembly and the outer forming assembly. The demolding mechanism has the beneficial effects that the demolding mechanism can drive the inner forming assembly and the outer forming assembly to rotate synchronously, then the demolding process is achieved, meanwhile, the demolding mechanism can limit and lock the inner forming assembly and the outer forming assembly, and the two forming assemblies are in a self-locking state; and accurate positioning and stability in the forming process are ensured.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a rotary demoulding mechanism. Background Art

[0002] An injection mold is a tool used to produce plastic products through injection molding. It is also a tool that gives plastic products a complete structure and precise dimensions. During injection molding, the heated and melted plastic is injected into the mold cavity by an injection molding machine at high pressure, and the molded product is obtained after cooling and solidification. This method is suitable for mass production of parts with complex shapes.

[0003] like Figure 1 As shown, it is a schematic diagram of an existing automobile fuel tank cap product A, in which arc-shaped inner buckles B and arc-shaped outer buckles C are arranged on the inner and outer sides of its side, which are called co-positioned double-sided arc buckle products; in the prior art, such as the patent CN107498804A, the patent adopts two oil cylinders and two racks to drive the inner and outer arc core blocks respectively, and perform clockwise and counterclockwise bidirectional rotation core pulling and demolding respectively. It has the following shortcomings: due to the difference in the working response of the two oil cylinders, it is difficult to work synchronously, resulting in low demolding efficiency of the double-cylinder rack type device; in addition, the double-cylinder rack type requires two oil cylinders, with many failure links, large operation and maintenance, and high cost. For this reason, a rotary demolding mechanism is proposed to solve the above technical problems. Utility Model Content

[0004] One of the purposes of the present application is to provide a rotary demoulding mechanism.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a rotary demolding mechanism, comprising an upper mold, a lower mold, an inner molding component, an outer molding component and a demolding mechanism, wherein the upper mold, the lower mold, the inner molding component and the outer molding component cooperate with each other to form a cavity for molding the required fuel tank cover; wherein the inner molding component is rotatably mounted on the lower mold and is used to mold the arcuate inner buckle of the fuel tank cover, the outer molding component is rotatably mounted on the lower mold and is used to mold the arcuate outer buckle of the fuel tank cover, and the demolding mechanism is mounted on the lower mold and connected to the inner molding component and the outer molding component; when demolding, the demolding mechanism is suitable for driving the inner molding component and the outer molding component to rotate synchronously, so that the inner molding component and the outer molding component are synchronously separated and demolded from the arcuate inner buckle and the arcuate outer buckle respectively; when closing the mold, the demolding mechanism is suitable for limiting and locking the inner molding component and the outer molding component, so that the inner molding component and the outer molding component are both in a self-locking state.

[0006] Preferably, the demolding mechanism includes a driving device, a moving block and a connecting rod group, the driving device is installed on the lower mold, the moving block is horizontally slidably installed in the lower mold and is connected to the output end of the driving device, the first end of the connecting rod group is connected to the inner molding component and the outer molding component, and the second end of the connecting rod group is cooperatively connected to the moving block; when demolding, the driving device is suitable for driving the connecting rod group to contract through the moving block, thereby causing the inner molding component and the outer molding component to rotate synchronously; when closing the mold, the driving device is suitable for driving the connecting rod group to expand through the moving block, thereby causing the inner molding component and the outer molding component to be limited and locked.

[0007] Preferably, the connecting rod group includes a pair of fixed rods, the first ends of the fixed rods are respectively hinged to the inner molding component and the outer molding component, and the second ends of the fixed rods are hinged to the moving block; when demolding, the fixed rods are suitable for rotating and contracting to pull the inner molding component and the outer molding component to rotate synchronously; when closing the mold, the fixed rods are suitable for rotating and expanding to a vertical state, at which time the fixed rods are perpendicular to the inner molding component, the outer molding component and the moving block.

[0008] Preferably, the connecting rod group includes a movable block and a pair of fixed rods, the movable block is vertically slidably installed on the lower mold, the first ends of the fixed rods are respectively connected to the inner molding component and the outer molding component, the second ends of the fixed rods are matched with the top end of the movable block through a traction structure, and the bottom end of the movable block is matched with the movable block through a guide structure; when demolding, the movable block is suitable for driving the movable block downward through the guide structure, thereby making the inner molding component and the outer molding component rotate synchronously under the drive of the traction structure; when closing the mold, the movable block is suitable for limit locking under the drive of the guide structure.

[0009] Preferably, the traction structure includes a traction groove and a pair of traction columns, the traction columns are correspondingly installed on the second end of the fixed rod, the traction groove is arranged at the top of the movable block and is horizontally arranged, and the traction column is adapted to the traction groove.

[0010] Preferably, the connecting rod group includes a movable block and a pair of fixed rods, the movable block is vertically slidably installed on the lower mold, the first ends of the fixed rods are respectively hinged to the inner molding component and the outer molding component, the second ends of the fixed rods are hinged to the movable block, and the bottom end of the movable block cooperates with the movable block through a guide structure; when demolding, the movable block is suitable for driving the movable block downward under the action of the guide structure, thereby making the inner molding component and the outer molding component rotate synchronously under the traction of the fixed rods; when closing the mold, the movable block is suitable for limit locking under the drive of the guide structure.

[0011] Preferably, the guide structure includes a guide block and a guide groove, the guide block is installed at the bottom end of the movable block, the guide groove is arranged at the top end of the movable block, the guide block and the guide groove form a sliding fit, and the guide groove includes a connected horizontal groove and an oblique guide groove; when demolding, the movable block is suitable for moving downward under the inclined sliding fit of the guide block and the oblique guide groove; when closing the mold, the guide block cooperates with the horizontal groove, thereby locking the movable block.

[0012] Preferably, the inner molding component and the outer molding component are rotatably mounted on the lower mold via the same rotating shaft.

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

[0014] The utility model is provided with a demoulding mechanism, which can drive the inner molding component and the outer molding component to rotate synchronously, thereby realizing the demoulding process. At the same time, the demoulding mechanism can also limit and lock the inner molding component and the outer molding component, that is, the two molding components are in a self-locking state, thereby ensuring accurate positioning and stability during the molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the structure of the automobile fuel tank cover.

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the upper mold after mold opening of the utility model.

[0018] Figure 4 It is a schematic diagram of the demoulding mechanism of the utility model.

[0019] Figure 5 It is a schematic diagram of a first embodiment of a connecting rod assembly of the utility model.

[0020] Figure 6It is a schematic diagram of a modified embodiment of the first embodiment of the connecting rod assembly of the utility model.

[0021] Figure 7 It is a schematic diagram of a second embodiment of a connecting rod assembly of the utility model.

[0022] Figure 8 This is a schematic diagram of the traction column structure of the utility model.

[0023] Fig. 9 It is a schematic diagram of a second embodiment of a connecting rod assembly of the utility model.

[0024] Fig.10 It is a schematic diagram of a third embodiment of a connecting rod assembly of the utility model.

[0025] In the figure: 1. upper mold; 2. lower mold; 3. inner molding component; 4. outer molding component; 5. demoulding mechanism; 501. driving device; 502. moving block; 503. connecting rod group; 5031. fixed rod; 5032. movable block; 6. guide structure; 601. guide block; 602. guide groove; 6021. horizontal groove; 6022. inclined guide groove; 7. traction structure; 701. traction groove; 702. traction column; 8. rotating shaft. DETAILED DESCRIPTION

[0026] 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.

[0027] 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, which 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 orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0028] 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.

[0029] In the prior art, such as Figure 1As shown, it is a product structure diagram of a car fuel tank cap A, and the inner and outer surfaces on the left side thereof are respectively provided with an arc-shaped inner buckle B and an arc-shaped outer buckle C, which is called a co-located double-sided arc-buckle product. The inner arc-shaped buckle B is formed by the inner molding component 3, and the outer arc-shaped buckle C is formed by the outer molding component 4. Therefore, when demolding, it is necessary to slide the inner molding component 3 and the outer molding component 4 in an arc shape, and then separate and demold the arc-shaped inner buckle B and the arc-shaped outer buckle C. Therefore, when designing, the technicians in this field need to set a driving source for the inner molding component 3 and the outer molding component 4 respectively, and then drive the two molding components to rotate relatively away from each other for separation and demolding. As we know, the mold itself has a compact structure, which will also increase the installation space of the mold. It is difficult to work synchronously with two driving sources (generally oil cylinders) at the same time, which makes the demolding efficiency low, the operation and maintenance volume large, and the cost high.

[0030] Therefore, the inventors of the present application have developed a rotary demoulding mechanism, one embodiment of which is as follows: Figures 1 to 10 As shown, it includes an upper mold 1, a lower mold 2, an inner molding component 3, an outer molding component 4 and a demoulding mechanism 5, and the upper mold 1, the lower mold 2, the inner molding component 3 and the outer molding component 4 cooperate with each other to form a cavity for molding the required fuel tank cap A. The inner molding component 3 is rotatably mounted on the lower mold 2 and is used to mold the arc-shaped inner buckle B of the fuel tank cap A, the outer molding component 4 is rotatably mounted on the lower mold 2 and is used to mold the arc-shaped outer buckle C of the fuel tank cap A, and the demoulding mechanism 5 is mounted on the lower mold 2 and connected to the inner molding component 3 and the outer molding component 4.

[0031] It is understandable that during demoulding, the demoulding mechanism 5 can drive the inner molding component 3 and the outer molding component 4 to rotate synchronously. Figure 5 As shown, the inner molding component 3 and the outer molding component 4 rotate relatively far apart (the inner molding component 3 rotates counterclockwise, and the outer molding component 4 rotates clockwise) and are respectively separated and demoulded synchronously with the arc inner buckle B and the arc outer buckle C. It can be seen that this synchronous separation and demoulding design effectively improves the production efficiency. At the same time, the use of a demoulding mechanism 5 can achieve synchronous control of the two molding components, save costs, reduce the space required for installation, and ensure the stability of the demoulding process.

[0032] Of course, on the other hand, during the mold closing process, that is, when the two molding components are located at the correct molding position driven by the demoulding mechanism 5, the demoulding mechanism 5 can limit and lock the inner molding component 3 and the outer molding component 4. In other words, at this time, the inner molding component 3 and the outer molding component 4 are both in a self-locking state, ensuring accurate positioning and stability during the molding process. This self-locking state can effectively prevent the molding components from loosening during the molding process, thereby ensuring the quality and production efficiency of the fuel tank cap A product.

[0033] In one of the embodiments of the present application, Figures 4 to 10 As shown, the demolding mechanism 5 includes a driving device 501, a moving block 502 and a connecting rod group 503. The driving device 501 is installed in the lower mold 2, the moving block 502 is horizontally slidably installed in the lower mold 2 and connected to the output end of the driving device 501, the first end of the connecting rod group 503 is connected to the inner molding component 3 and the outer molding component 4, and the second end of the connecting rod group 503 is matched and connected to the moving block 502.

[0034] It is understandable that when demoulding, Figure 5 As shown, at this time, the driving device 501 can drive the moving block 502 to move, and the moving block 502 acts on the connecting rod group 503, thereby causing the connecting rod group 503 to contract, thereby causing the inner molding component 3 and the outer molding component 4 to rotate synchronously, that is, performing the demolding process.

[0035] Of course, when the mold is being closed, the opposite is true, that is, the driving device 501 can drive the connecting rod group 503 to expand through the moving block 502, so that the inner molding component 3 and the outer molding component 4 can rotate synchronously to the molding position, and the expanded connecting rod group 503 can limit and lock the two molding components, so that the two are in a self-locking state.

[0036] It should be known that the connecting rod group 503 has two extreme states, namely the fully expanded state and the fully retracted state; when the mold is closed, the connecting rod group 503 in the fully expanded state can make the two molding components self-locking, so that during the molding and injection molding process, the two molding components can be guaranteed to be in the correct position and will not loosen, thereby greatly improving the stability and accuracy of injection molding.

[0037] It should be noted that the specific structure and working principle of the driving device 501 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here; common driving devices 501 include hydraulic cylinders, pneumatic cylinders, and linear motors, etc., and those skilled in the art can choose according to actual needs.

[0038] It should be further explained that in the present application, the driving device 501 preferably adopts a hydraulic (oil) cylinder; it should be known that in a general hydraulic cylinder, the thrust is much greater than the pulling force. And we also know that in the process of demoulding and closing the mold of the molding component, the demoulding force must be greater than the closing force. Therefore, we can set the hydraulic cylinder as follows: Figure 5 As shown, when demoulding is performed, the piston end of the hydraulic cylinder is extended to push the moving block 502 to move rightward; and when closing the mold, the piston end of the hydraulic cylinder is shortened to pull back the moving block 502 to move leftward.

[0039] It can be seen that we use the larger thrust generated by the hydraulic cylinder to realize the demoulding of the molding component, and the relatively small pulling force generated by the hydraulic cylinder to realize the closing of the molding component. Through such a rational design, under the premise of ensuring production efficiency and molding quality, we can choose a smaller hydraulic cylinder, thereby reducing costs and reducing the space required for mold installation.

[0040] The present application does not limit the specific structure of the connecting rod group 503, that is, the connecting rod group 503 has various structural forms, including but not limited to the following three:

[0041] Structure 1 (such as Figure 5 As shown): the connecting rod group 503 includes a pair of fixed rods 5031, the first ends of the two fixed rods 5031 are respectively hinged to the inner molding component 3 and the outer molding component 4, and the second ends of the two fixed rods 5031 are both hinged to the moving block 502.

[0042] It is understandable that if Figure 5 As shown in the figure above, at this time, the two forming components are in the position when forming, that is, the connecting rod group 503 is in a fully expanded state. It can also be clearly seen from the figure that at this time, the two fixed rods 5031 are in a vertical state, that is, the two fixed rods 5031 are perpendicular to the inner forming component 3 and the outer forming component 4, and of course, the two fixed rods 5031 and the moving block 502 are also in a vertical state, so that the two forming components are in a self-locking limit state. It should be known that at this time, the limit of the two forming components is mainly supported by the two vertical fixed rods 5031, and the force of the fixed rods 5031 on the moving block 502 is also vertically downward, so that the moving block 502 is almost not subjected to force in the horizontal direction. As long as the strength of the fixed rods 5031 is sufficient, the locking support of the forming components can be achieved.

[0043] Of course, when demoulding, Figure 5 As shown in the figure below, at this time, the driving device 501 pushes the moving block 502 to move right, and the moving block 502 will act on the two fixed rods 5031 to rotate, and the fixed rods 5031 will pull the two molding components to rotate synchronously until the two fixed rods 5031 rotate and shrink to the limit state (the connecting rod group 503 is in a fully retracted state), thereby realizing the demoulding process. It can be seen that the mold closing and demoulding process of the two molding components can be realized only through the action of the two fixed rods 5031, and the mold closing molding components can also be interlocked, thereby greatly improving the stability and accuracy of injection molding; and it has a simple structure, low manufacturing cost, convenient use, and easy maintenance and repair.

[0044] It should be noted that, in actual use, the rotation angles of the two molding components may be different; for example, in the present application, the depth of the arc inner buckle B is deeper, and the depth of the arc outer buckle C is shallower, so when demolding, the rotation angle of the inner molding component 3 is greater than that of the outer molding component 4. Figure 5 As shown, in order to ensure the self-locking of the inner molding component 3 during mold closing and a larger rotation angle during mold demolding, for the fixing rod 5031 connected to the inner molding component 3, the top end of the fixing rod 5031 and the hinge point of the inner molding component 3 will be very close to the rotation point of the inner molding component 3, which will make the support and connection effect of the fixing rod 5031 on the inner molding component 3 not very ideal.

[0045] Therefore, in the actual setting process, under the premise of ensuring the support and limitation of the inner molding component 3 and the stability of the connection, the length of the left fixing rod 5031 can be set to be greater than the length of the right fixing rod 5031, so that the hinge point between the fixing rod 5031 and the inner molding component 3 will be located in the middle of the bottom of the inner molding component 3, that is, the left hinge point and the right hinge point (the hinge point between the fixing rod 5031 and the outer molding component 4) are in a nearly symmetrical position, which can make the connection between the fixing rod 5031 and the inner molding component 3 more stable and reasonable.

[0046] It should be noted that, by lengthening the left fixing rod 5031, it is difficult to ensure the self-locking state of the inner molding component 3 during mold closing, but the right fixing rod 5031 can still ensure the vertical state, thereby achieving the self-locking of the outer molding component 4. In other words, when making actual settings, the technicians in this field should consider the actual situation and not blindly pursue the self-locking of the two fixing rods 5031 on the two molding components, which may make the matching connection between the other molding component and the fixing rod 5031 unreasonable. In fact, it is only necessary to ensure that one molding component can be self-locked and the other molding component can also be stably supported by the limit position; that is, the technicians in this field can make adaptive changes according to the specific situation.

[0047] Structure 2 (such as Figures 7 to 9 As shown): The connecting rod group 503 includes a movable block 5032 and a pair of fixed rods 5031, the movable block 5032 is vertically slidably installed on the lower mold 2, the first ends of the fixed rods 5031 are respectively connected to the inner molding component 3 and the outer molding component 4, the second ends of the fixed rods 5031 cooperate with the top end of the movable block 5032 through the traction structure 7, and the bottom end of the movable block 5032 cooperates with the moving block 502 through the guide structure 6.

[0048] It is understandable that if Fig. 9As shown, the driving device 501 will push the moving block 502 to move right, and the moving block 502 drives the movable block 5032 to move downward through the guide structure 6. The movable block 5032 that moves downward will drive the inner molding component 3 and the outer molding component 4 to rotate synchronously through the traction structure 7, thereby realizing the demoulding process. Of course, when the mold is closed, the movable block 5032 is limited and locked under the drive of the guide structure 6. In other words, since the movable block 5032 slides vertically, it will be limited and locked in the left and right directions. When the movable block 5032 moves up to the maximum height for mold closing, the bottom end of the movable block 5032 will be locked by the guide structure 6, thereby realizing the full-scale locking of the movable block 5032 in the upper, lower, left and right directions, that is, realizing the self-locking limit of the two molding components.

[0049] As a further description of the above embodiment: Figures 7 to 9 As shown, the traction structure 7 includes a traction groove 701 and a pair of traction columns 702. The traction columns 702 are correspondingly installed on the second end of the fixed rod 5031. The traction groove 701 is arranged at the top of the movable block 5032 and is arranged horizontally. The traction column 702 is adapted to the traction groove 701, that is, the traction column 702 can move left and right in the horizontally arranged traction groove 701.

[0050] like Figure 7 As shown, the guide structure 6 includes a guide block 601 and a guide groove 602. The guide block 601 is installed at the bottom end of the movable block 5032, and the guide groove 602 is set at the top end of the movable block 502. The guide block 601 and the guide groove 602 form a sliding fit, and the guide groove 602 includes a horizontal groove 6021 and an inclined guide groove 6022 connected to each other.

[0051] In order to facilitate a clearer understanding of the functions of the traction structure 7 and the guide structure 6, the working principles thereof are described below:

[0052] (1) Fig. 9 As shown in the figure above, the two forming components are in the position when forming, that is, the connecting rod group 503 is in a fully extended state. Of course, at this time, the guide block 601 cooperates with the horizontal groove 6021, and the movable block 5032 itself is in the highest position, and its bottom is supported and limited by the horizontal groove 6021, so that the movable block 5032 is limited and locked in the vertical direction, and the movable block 5032 supports the two forming components through the guide structure 6 and the fixed rod 5031, so that the two forming components are also in a self-locking state.

[0053] (2) When demolding, Fig. 9As shown in the figure below, at this time, the driving device 501 pushes the moving block 502 to move right, and at this time the guide block 601 is equivalent to moving from the horizontal groove 6021 to the inclined guide groove 6022. Under the inclined sliding cooperation of the guide block 601 and the inclined guide groove 6022, the movable block 5032 will move vertically downward, and the movable block 5032 will pull the two fixed rods 5031 to rotate synchronously, that is, at this time, the two traction columns 702 will move relatively close to each other in the traction groove 701 until they are close to the limit state (the connecting rod group 503 is in a fully retracted state), thereby realizing the process of demolding the two molding components.

[0054] Structure three: The connecting rod group 503 includes a movable block 5032 and a pair of fixed rods 5031. The movable block 5032 is vertically slidably installed on the lower mold 2. The first ends of the two fixed rods 5031 are hinged to the inner molding component 3 and the outer molding component 4 respectively. The second end of the fixed rod 5031 is hinged to the movable block 5032. The bottom end of the movable block 5032 cooperates with the moving block 502 through the guide structure 6. Of course, the structural principle of this guide structure 6 is the same as above, so it will not be repeated.

[0055] It is understandable that if Fig.10 As shown in the figure above, the two forming components are in the position when forming, that is, the connecting rod group 503 is in a fully extended state. Of course, at this time, the guide block 601 cooperates with the horizontal groove 6021, and the movable block 5032 itself is in the highest position, and its bottom is supported and limited by the horizontal groove 6021, so that the movable block 5032 is limited and locked in the vertical direction, and the movable block 5032 supports the two forming components through the fixed rod 5031, so that the two forming components are also in a self-locking state.

[0056] When demoulding, Fig.10 As shown in the figure below, at this time, the driving device 501 pushes the moving block 502 to move right, and the guide block 601 is equivalent to moving from the horizontal groove 6021 to the inclined guide groove 6022. Under the inclined sliding cooperation of the guide block 601 and the inclined guide groove 6022, the movable block 5032 will move vertically downward, and the movable block 5032 will pull the two molding components to rotate relative to each other through the two fixed rods 5031 until they rotate to the limit state (the connecting rod group 503 is in a fully retracted state), thereby realizing the process of demolding the two molding components.

[0057] It should be noted that when the structure 1 is adopted, only two fixing rods 5031 are needed, which has a simple structure, low manufacturing cost and convenient later maintenance. However, when realizing the self-locking state of the two molding components, it is necessary to ensure that the fixing rods 5031 are in a vertical state. After long-term use, the fixing rods 5031 may be deformed or loosened and produce errors, and it is difficult to maintain an absolute vertical state, affecting the self-locking effect. When the structure 2 and the structure 3 are adopted, it is only necessary to ensure that the guide block 601 and the horizontal groove 6021 are matched during the mold closing, and the error can be adjusted in a larger range, thereby ensuring the stability of the self-locking effect. Of course, all three structures can meet actual needs, and technicians in this field can choose according to actual conditions.

[0058] In one of the embodiments of the present application, Figure 8 As shown, since the arc-shaped inner buckle B and the arc-shaped outer buckle C of the fuel tank cover A are also arranged adjacent to each other, the inner molding component 3 and the outer molding component 4 can be rotatably installed in the lower mold 2 through the same rotating shaft 8. This can make the installation of the inner molding component 3 and the outer molding component 4 more compact, reduce the installation space of the mold, and also make the installation of the two more convenient and quick.

[0059] Specifically, Figure 4 as well as Figure 7 As shown, the output end of the driving device 501 and the moving block 502 can be detachably installed, and the moving block 502, the connecting rod group 503 and the two forming components can be regarded as a whole, which is very simple and convenient during the installation and disassembly process, greatly improving the convenience and efficiency of assembly.

[0060] 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. A rotary demoulding mechanism, characterized in that: include: An upper mold, a lower mold, an inner molding component, an outer molding component and a demoulding mechanism, wherein the upper mold, the lower mold, the inner molding component and the outer molding component cooperate with each other to form a cavity for molding the required fuel tank cover; The inner molding component is rotatably mounted on the lower mold and used to mold the arc-shaped inner buckle of the fuel tank cover, and the outer molding component is rotatably mounted on the lower mold and used to mold the arc-shaped outer buckle of the fuel tank cover; the demoulding mechanism includes a hydraulic cylinder, a moving block and a connecting rod group, the hydraulic cylinder is mounted on the lower mold, the moving block is horizontally slidably mounted in the lower mold and connected to the output end of the hydraulic cylinder, the first end of the connecting rod group is connected to the inner molding component and the outer molding component, and the second end of the connecting rod group is matched and connected to the moving block; During demolding, the hydraulic cylinder is suitable for pushing the moving block to drive the connecting rod group to contract, thereby causing the inner molding component and the outer molding component to rotate synchronously; during mold closing, the hydraulic cylinder is suitable for pulling the moving block to drive the connecting rod group to expand, thereby causing the inner molding component and the outer molding component to be limited and locked.

2. The rotary demoulding mechanism according to claim 1, characterized in that: The connecting rod group includes a pair of fixed rods, the first ends of the fixed rods are respectively hinged to the inner forming component and the outer forming component, and the second ends of the fixed rods are hinged to the moving block; During demolding, the fixed rod is suitable for rotating and contracting to pull the inner molding component and the outer molding component to rotate synchronously; during mold closing, the fixed rod is suitable for rotating and expanding to a vertical state, at which time the fixed rod is perpendicular to the inner molding component, the outer molding component and the moving block.

3. The rotary demoulding mechanism according to claim 1, characterized in that: The connecting rod group includes a movable block and a pair of fixed rods, the movable block is vertically slidably installed on the lower mold, the first ends of the fixed rods are respectively connected to the inner molding component and the outer molding component, the second ends of the fixed rods are matched with the top end of the movable block through a traction structure, and the bottom end of the movable block is matched with the moving block through a guide structure; During demolding, the movable block is suitable for driving the movable block downward through the guide structure, thereby causing the inner molding component and the outer molding component to rotate synchronously under the drive of the traction structure; during mold closing, the movable block is suitable for limit locking under the drive of the guide structure.

4. The rotary demoulding mechanism according to claim 3, characterized in that: The traction structure comprises a traction groove and a pair of traction columns, wherein the traction columns are correspondingly mounted on the second end of the fixing rod, the traction groove is arranged at the top end of the movable block and is arranged horizontally, and the traction column is adapted to the traction groove.

5. The rotary demoulding mechanism according to claim 1, characterized in that: The connecting rod group includes a movable block and a pair of fixed rods, the movable block is vertically slidably mounted on the lower mold, the first ends of the fixed rods are respectively hinged to the inner molding component and the outer molding component, the second ends of the fixed rods are hinged to the movable block, and the bottom end of the movable block is matched with the moving block through a guide structure; During demolding, the movable block is suitable for driving the movable block downward under the action of the guide structure, thereby causing the inner molding component and the outer molding component to rotate synchronously under the traction of the fixed rod; during mold closing, the movable block is suitable for limit locking under the drive of the guide structure.

6. The rotary demoulding mechanism according to claim 3 or 5, characterized in that: The guide structure includes a guide block and a guide groove, wherein the guide block is installed at the bottom end of the movable block, and the guide groove is arranged at the top end of the movable block, wherein the guide block and the guide groove form a sliding fit, and the guide groove includes a horizontal groove and an oblique guide groove connected to each other; During demoulding, the movable block is adapted to move downward under the inclined sliding cooperation between the guide block and the inclined guide groove; during mold closing, the guide block cooperates with the horizontal groove, thereby locking the movable block.

7. The rotary demoulding mechanism according to any one of claims 1 to 5, characterized in that: The inner molding component and the outer molding component are rotatably mounted on the lower mold via the same rotating shaft.

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