Die for processing shell with positive and negative inverted buckles

Abstract

The invention relates to the technical field of kitchen appliances, in particular to a mold for processing a shell with positive and negative inverted buckles, which comprises a movable mold and a fixed mold, a demolding mechanism is arranged in the movable mold, the demolding mechanism comprises a first ejector rod and a second ejector rod, the first ejector rod is provided with a first matching part for constructing an outer inverted buckle, and the second ejector rod is provided with a second matching part for constructing an outer inverted buckle; the first ejector rod moves in the mold opening direction and the first direction perpendicular to the mold opening direction at the same time under the action of the mold driving piece. The second ejector rod is arranged in the first direction perpendicular to the mold opening direction, the second ejector rod and a first plane perpendicular to the mold opening direction are obliquely arranged, one end of the second ejector rod extends into the first ejector rod and is provided with a second matching part for constructing an inner inverted buckle, and the second ejector rod moves in the mold opening direction under the action of the mold driving piece and the driving rod. And under the action of the limiting structure and the first ejector rod, the second matching part moves in the second direction perpendicular to the mold opening direction, so that the second matching part is separated from the inverted buckle, the shell with the positive and negative inverted buckles on the same surface can be separated from the mold at a time, and the production process is simplified.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a mold for processing a shell with front and back inverted buckles. Background Art

[0002] The mold generally includes a fixed mold and a movable mold. The product is formed by enclosing the fixed mold side cavity on the fixed mold and the fixed mold side cavity on the movable mold. The mold can form complex product structures, so injection molding products are widely used in industrial product manufacturing. In the processing of injection molding products, it is often encountered that the product has an "undercut" structure that is inconsistent with the mold opening direction, such as inner buckle, outer buckle, upper convex, lower concave, side concave, and side convex, which affects the complete mold opening of the product. The solution is usually to make a mold opening plan, and two forms of structures such as "elevator" and "slider" are commonly used.

[0003] However, for some special product designs, such as a shell including at least three continuous surfaces, especially the shell of household appliances, in order to ensure that the entire surface of the shell is flat and beautiful in appearance, and at the same time, the production and installation process of assembling the shell as a whole machine is simple and easy to operate, and the connection between the shell and other components after installation is firm, it is necessary to have internal and external undercuts in different directions on at least one surface. The single mold core pulling scheme of the prior art cannot complete the one-time complete demolding of the product. For example, the patent with the existing application publication number CN118219509A discloses a core pulling mechanism and its mold, in which one end of the first ejector rod of the core pulling mechanism is connected to the driving member of the mold. The other end of the first push rod is in contact with the product, and the first push rod is inclined in the mold opening direction; the second push rod crosses the first push rod and can be slidably matched, and the first end of the second push rod is constructed with a hook of a molding groove; the guide plate is arranged parallel to the depth direction of the groove, and in the mold opening direction, when the mold opening length is not greater than the depth of the groove, the second end of the second push rod is slidably in contact with the guide plate; the limiting structure is arranged between the first push rod and the second push rod, and in the mold opening direction, when the mold opening length is greater than the depth of the groove, the limiting structure can enable the first push rod to drive the second push rod to move in a direction perpendicular to the mold opening direction, thereby realizing complete demolding from the bending portion and the groove on the bending portion.

[0004] Although the above-mentioned core-pulling structure can demould products with multiple "undercut" forms coexisting in one structure, the product needs to be driven by a robotic arm to move in a direction perpendicular to the mold opening direction after demoulding, and can only be taken out after moving a certain distance; for the above-mentioned shell with at least three continuous surfaces, when the robotic arm drives the product to move in a direction perpendicular to the mold opening direction after demoulding, one of the surfaces will block the moving stroke, making it still impossible to demould and take out the shell from the mold at one time, which results in either the need to change the product structure design plan or to add or change the mold, making the mold structure more complicated, thereby increasing a large amount of product manufacturing costs. Summary of the invention

[0005] The present application arranges the second push rod along a first direction perpendicular to the mold opening direction and arranges it at an inclination to the first plane perpendicular to the mold opening direction, so that a shell with positive and negative buckles on the same surface can be removed from the mold at one time, thereby simplifying the production process, and the shell is firmly connected and beautiful.

[0006] The present application provides a mold for processing a shell with front and back inverted buckles, which adopts the following technical solution:

[0007] A mold for processing a shell with positive and negative undercuts, the shell comprising at least three continuous surfaces, and at least one surface is provided with inner undercuts and outer undercuts in different directions, the mold comprising a movable mold and a fixed mold that cooperate with each other, a movable mold core and a demoulding mechanism are arranged in the movable mold, the demoulding mechanism comprises a first ejector rod and a second ejector rod, a first matching portion for constructing the outer undercut is arranged on the side wall of the first ejector rod, one end of the first ejector rod is connected to a mold driving member, so that the first ejector rod moves simultaneously in a mold opening direction and a first direction perpendicular to the mold opening direction under the action of the mold driving member; the second ejector rod is arranged along the first direction perpendicular to the mold opening direction, and is arranged obliquely with a first plane perpendicular to the mold opening direction, one end of the second ejector rod is connected to a driving rod, and the other end extends into the first ejector rod and is provided with a second matching portion for constructing the inner undercut;

[0008] The other end of the driving rod is connected to the mold driving member, and a limiting structure is arranged between the driving rod and the second ejector rod. The second ejector rod moves in the mold opening direction under the action of the mold driving member and the driving rod, and moves in a second direction perpendicular to the mold opening direction under the action of the limiting structure and the first ejector rod, so that the second mating part is disengaged from the internal undercut.

[0009] Optionally, a sliding block is obliquely arranged on the first push rod along the mold opening direction, and a sliding groove slidably matched with the sliding block is arranged on the movable mold core; or, a sliding groove is obliquely arranged on the first push rod along the mold opening direction, and a sliding block extending into the sliding groove is arranged on the movable mold core.

[0010] Optionally, the side wall of the first push rod close to the driving rod is inclined with respect to the mold opening direction and abuts against the movable mold core.

[0011] Optionally, an inclined rod is arranged between the first ejector rod and the mold driving member, and the inclined rod is inclined along the mold opening direction.

[0012] Optionally, a side wall of the first push rod close to the driving rod is provided with a clearance groove, the clearance groove extends along the mold opening direction, and the driving rod is located in the clearance groove when the first push rod moves.

[0013] Optionally, the depth of the clearance groove gradually increases along the moving direction of the driving rod.

[0014] Optionally, the limiting structure includes a limiting block arranged on the second push rod, and a limiting groove for sliding the limiting block is arranged on the driving rod along a second direction perpendicular to the mold opening direction, and the length of the limiting groove along the second direction perpendicular to the mold opening direction is greater than the length of the inner undercut.

[0015] Optionally, the limiting groove extends to both ends of the driving rod.

[0016] Optionally, the demoulding mechanism further includes an ejector plate, which is movably arranged in the movable mold along the mold opening direction, the ejector plate is connected to the mold driving component, and the first ejector rod and the ejector rod are both fixedly arranged on the ejector plate.

[0017] In summary, this application has at least the following beneficial effects:

[0018] 1. After the movable mold and the fixed mold are opened, the mold driving component drives the first ejector pin to move, so that the first ejector pin moves in the mold opening direction and also moves in the first direction perpendicular to the mold opening direction, so that the side wall of the first ejector pin is separated from the first surface of the shell body, and the first matching portion is separated from the outer undercut; at the same time, the movable mold driving component drives the driving rod to move along the mold opening direction, and moves the second ejector pin along the mold opening direction. Since the second ejector pin is arranged in the first ejector pin, the second ejector pin is squeezed during the movement of the first ejector pin, and the second ejector pin is driven to move in the second direction perpendicular to the mold opening direction with the cooperation of the limiting structure, so that the second matching portion is separated from the inner undercut, thereby realizing the demoulding of the shell body; at this time, the shell body is driven to move in the mold opening direction by the manipulator, and the shell body is driven to move in the first direction or the second direction perpendicular to the mold opening direction, so that the shell body can be taken out, and its demoulding is more convenient.

[0019] The demoulding mechanism of the present application can demould a shell body with positive and negative undercuts on the same surface from the mold at one time, thereby simplifying the production process, and the shell body is firmly connected and beautiful, and the demoulding mechanism has a simple structure, is easy to produce and manufacture, and reduces the production cost of the product; in addition, the driving rod moves along the mold opening direction under the drive of the mold driving member, and the second ejector rod moves with the driving rod, and the driving rod has a long stroke, which can make the second ejector rod disengage from the inner undercut with a larger depth; while in the prior art, one end of the second ejector rod is slidably abutted against a guide plate arranged in the movable mold, and the stroke of the second ejector rod depends on the height of the movable mold itself. When making an inner undercut with a larger depth, it is necessary to replace the movable mold with a suitable height, which is costly. The present application does not need to change the height of the movable mold, and its movable mold has strong adaptability, and the overall volume of the mold is small, which effectively reduces the space occupied by the mold.

[0020] 2. A sliding block or a sliding groove is obliquely arranged on the first ejector rod along the mold opening direction, and the distance between the sliding block or the sliding groove and the first surface of the shell gradually increases along the moving direction of the driving rod. A sliding groove or a sliding block that slidably cooperates with the sliding block or the sliding groove is arranged on the movable mold core, so that the first ejector rod can move in a first direction perpendicular to the mold opening direction under the driving action of the mold driving component, so as to facilitate the side wall of the first ejector rod to separate from the first surface of the shell and to separate the first matching portion from the external undercut.

[0021] 3. The side wall of the first push rod close to the driving rod is inclined in the mold opening direction and abuts against the movable mold core. The thickness of the first push rod gradually increases along the moving direction of the driving rod. After cooperating with the sliding block groove, it helps the first push rod to move in the mold opening direction and the first direction perpendicular to the mold opening direction under the driving action of the mold driving member; and the first push rod fits with the movable mold core, which can improve the stability of the movement of the first push rod.

[0022] 4. A clearance groove is provided on the side wall of the first ejector rod near the driving rod, and the clearance groove extends along the mold opening direction. When the first ejector rod moves, the driving rod is located in the clearance groove, and there is a gap between the driving rod and the bottom wall of the clearance groove, and the gap is greater than the depth of the inner undercut. By providing the clearance groove on the first ejector rod, the travel requirements of the first ejector rod can be met, and the space occupied by the first ejector rod and the driving rod can be reduced.

[0023] 5. The depth of the clearance groove gradually increases along the moving direction of the driving rod, that is, the distance between the driving rod and the bottom wall of the clearance groove remains consistent, which can reduce the production cost while meeting the stroke requirement of the first push rod.

[0024] 6. The limiting structure includes a limiting block arranged on the second ejector rod, and a limiting groove for sliding the limiting block is arranged on the driving rod along the second direction perpendicular to the mold opening direction; when the mold driving member drives the driving rod to move along the mold opening direction, the driving rod drives the second ejector rod to move along the mold opening direction. Since the second ejector rod is arranged in the first ejector rod, the first ejector rod squeezes the second ejector rod during the process of moving in the first direction perpendicular to the mold opening direction, and drives the second ejector rod to move in the second direction perpendicular to the mold opening direction under the cooperation of the limiting block and the limiting groove, so that the second matching portion is disengaged from the inner undercut; and the length of the limiting groove along the second direction perpendicular to the mold opening direction is greater than the length of the inner undercut, so as to ensure that the second matching portion on the second ejector rod can be smoothly pulled out of the inner undercut.

[0025] 7. The limit groove extends to both ends of the driving rod, which is convenient for the installation and disassembly of the limit block and the second ejector rod; different second ejector rods can be replaced according to the shape of the inner undercut, which is convenient for operation and can also reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the shell shown in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the mold shown in the embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram of the demoulding mechanism shown in an embodiment of the present application.

[0029] Figure 4 It is a structural schematic diagram of the demoulding mechanism and the shell shown in the embodiment of the present application.

[0030] Figure 5 It is another structural schematic diagram of the demoulding structure and the shell shown in the embodiment of the present application.

[0031] Figure 6 It is a top view of the movable mold shown in the embodiment of the present application.

[0032] Explanation of the reference numerals: 1. Shell; 11. First surface; 12. Second surface; 13. Third surface; 14. Inner undercut; 15. Outer undercut; 21. Fixed mold; 22. Moving mold; 221. Moving mold core; 23. Slider; 3. Demolding mechanism; 31. First ejector pin; 311. First matching portion; 312. Sliding block; 313. Disengagement groove; 32. Second ejector pin; 321. Second matching portion; 33. Driving rod; 34. Limiting structure; 341. Limiting block; 342. Limiting groove; 35. Fixed rod; 36. Ejector plate. DETAILED DESCRIPTION

[0033] The present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present application, and their purpose is to allow those skilled in the art to better understand the technical solution of the present application, and should not be regarded as limiting the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 therefore cannot be understood as a limitation on the present application.

[0035] The present application embodiment discloses a housing, such as Figure 1As shown, it includes at least three continuous surfaces, and at least one surface is provided with inner undercuts 14 and outer undercuts 15 in different directions. In this embodiment, the housing 1 can be the main body of the cooking device, which includes a first surface 11, a second surface 12 and a third surface 13, wherein the first surface 11, the second surface 12 and the third surface 13 are connected in sequence to form a U-shape, the inner side wall of the first surface 11 is provided with an inner undercut 14, and the outer side wall of the first surface 11 is provided with at least one outer undercut 15 extending outward.

[0036] The present application also discloses a mold for processing a shell with positive and negative buckles, such as Figure 2 and Figure 3 As shown, it includes a movable mold 22 and a fixed mold 21 that cooperate with each other. Four sliders 23 are movably arranged in the movable mold 22, and each slider 23 has a partial product cavity formed inside, and is matched with the movable mold 22 and the partial product cavity of the fixed mold 21 to form a complete molding cavity. Four inclined guide pillars are fixedly installed in the fixed mold 21, and the inclined guide pillars are slidably arranged with the corresponding sliders 23. When the movable mold 22 and the fixed mold 21 are opened, the sliders 23 move with the movable mold 22, and slide relative to the inclined guide pillars, causing the sliders 23 to move to the side away from the product, so that the molded product is exposed.

[0037] It should be noted that the opening and closing of the movable mold 22 and the fixed mold 21 are realized by a mold driving component, and the mold driving component can be set as a hydraulic system or an electric system of the injection molding machine.

[0038] The movable mold core 221 and the demoulding mechanism 3 are also arranged in the movable mold 22. The demoulding mechanism 3 includes a first ejector rod 31 and a second ejector rod 32. A first matching portion 311 for forming the external undercut 15 is arranged on one side wall of the first ejector rod 31. One end of the first ejector rod 31 is connected to the mold driving member, so that the first ejector rod 31 is moved in the mold opening direction and in the first direction perpendicular to the mold opening direction under the action of the mold driving member, so that the first matching portion 311 is separated from the external undercut 15. The second ejector rod 32 is arranged along the first direction perpendicular to the mold opening direction and is connected to the first plane perpendicular to the mold opening direction. The surface is arranged at an inclination, one end of the second push rod 32 is connected to the driving rod 33, and the other end extends into the first push rod 31 and is provided with a second matching portion 321 for constructing the internal undercut 14; the other end of the driving rod 33 is connected to the mold driving member, and a limiting structure 34 is arranged between the driving rod 33 and the second push rod 32. The second push rod 32 moves in the mold opening direction under the driving action of the mold driving member and the driving rod 33, and moves in a second direction perpendicular to the mold opening direction under the action of the limiting structure 34 and the first push rod 31, so that the second matching portion 321 is disengaged from the internal undercut 14.

[0039] The driving rod 33 is located at one end of the first push rod 31 away from the first surface 11 of the shell, and the distance between the first push rod 31 and the driving rod 33 is greater than the length of the outer undercut 15 to ensure that the first push rod 31 is separated from the shell 1 and the outer undercut 15 during movement.

[0040] It should be noted that the mold opening direction is the direction in which the movable mold 22 moves relative to the fixed mold 21. When the mold opening direction is set as the x-axis, the first direction perpendicular to the mold opening direction is the y-axis, the second direction perpendicular to the mold opening direction is the z-axis, and the first plane perpendicular to the mold opening direction is the plane where the y-axis is located, that is, the vertical plane. In other embodiments, the first direction perpendicular to the mold opening direction may also be the z-axis, and the second direction perpendicular to the mold opening direction may be the y-axis.

[0041] During injection molding, the plastic melt injected from the nozzle of the injection molding machine enters the molding cavity through the main channel. After the plastic melt fills the molding cavity and undergoes pressure holding, shrinkage compensation, cooling and finalization, the mold driving component drives the movable mold 22 to move along the mold opening direction. At the same time, the slider 23 and the corresponding inclined guide column slide relative to each other, causing the slider 23 to move to the side away from the product. When the movable mold 22 and the fixed mold 21 are separated, the molded shell 1 is exposed. At this time, the molded shell 1 is sleeved on the outer side of the movable mold core 221 and the first ejector 31.

[0042] When the movable mold 22 and the fixed mold 21 are opened, the demolding mechanism 3 installed inside the movable mold 22 will generate relative movement with other parts of the movable mold 22 under the driving action of the mold driving component, and the shell 1 will be removed from the movable mold 22 to achieve complete demolding of the shell 1.

[0043] Specifically, the mold driving component drives the first push rod 31 to move, so that the first push rod 31 moves in the mold opening direction and also moves in the first direction perpendicular to the mold opening direction, that is, the first push rod 31 moves to the left and front, so that the side wall of the first push rod 31 is separated from the first surface 11 of the shell 1; at the same time, the movable mold 22 driving component drives the driving rod 33 to move along the mold opening direction. Since the second push rod 32 is arranged in the first push rod 31, the second push rod 32 is squeezed during the movement of the first push rod 31, and the second push rod 32 is driven to move in the second direction perpendicular to the mold opening direction with the cooperation of the limiting structure 34, that is, the second push rod 32 moves to the lower left, so that the second matching portion 321 is separated from the inner undercut 14, and its second matching portion 321 is located at the lower left of the inner undercut 14, thereby realizing the demolding of the shell 1; at this time, the shell 1 is driven by the robot to move in the mold opening direction, and the shell 1 is driven to move in the first direction or the second direction perpendicular to the mold opening direction, and then the shell 1 can be taken out.

[0044] In other embodiments, after the shell 1 is demolded, the shell 1 can be driven to move along the mold opening direction by the ejection mechanism inside the movable mold 22, and the shell 1 can be driven to move along the first direction or the second direction perpendicular to the mold opening direction by a robot to take out the shell 1.

[0045] Combination Figure 4 , wherein a sliding block 312 is obliquely provided on the first push rod 31 along the mold opening direction, and the distance between the sliding block 312 and the first surface 11 of the housing 1 gradually increases along the moving direction of the driving rod 33, and a sliding groove that slidably cooperates with the sliding block 312 is provided on the movable mold 22 core, so that the first push rod 31 moves in a first direction perpendicular to the mold opening direction under the driving action of the mold driving member. In other embodiments, a sliding groove is obliquely provided on the first push rod 31 along the mold opening direction, and a sliding block 312 that extends into the sliding groove is provided on the movable mold core 221.

[0046] It should be noted that a fixing rod 35 is arranged between the first push rod 31 and the mold driving member, and the fixing rod 35 is arranged along the mold opening direction, and the side wall of the first push rod 31 close to the driving rod 33 is inclined to the mold opening direction, and abuts against the movable mold 22 core, wherein the thickness of the first push rod 31 gradually increases along the moving direction of the driving rod 33, and after cooperating with the sliding groove of the sliding block 312, it helps the first push rod 31 to move in the mold opening direction and the first direction perpendicular to the mold opening direction under the driving action of the mold driving member; and the first push rod 31 fits with the movable mold 22 core, which can improve the stability of the movement of the first push rod 31.

[0047] In other embodiments, an inclined rod is arranged between the first push rod 31 and the mold driving member, and the inclined rod is inclined along the mold opening direction, that is, the distance between the inclined rod and the first surface 11 of the shell 1 gradually increases along the moving direction of the driving rod 33, so as to drive the first push rod 31 to move simultaneously in the mold opening direction and in the first direction perpendicular to the mold opening direction.

[0048] In addition, a clearance groove 313 is provided on the side wall of the first push rod 31 close to the driving rod 33, and the clearance groove 313 extends along the mold opening direction. When the first push rod 31 moves, the driving rod 33 is located in the clearance groove 313, and there is a gap between the driving rod 33 and the bottom wall of the clearance groove 313, and the gap is greater than the length of the inner undercut 14. By providing the clearance groove 313 on the first push rod 31, the travel requirement of the first push rod 31 can be met, and the space occupied by the first push rod 31 and the driving rod 33 can be reduced.

[0049] When the first push rod 31 moves in the mold opening direction under the driving action of the mold driving member, under the sliding cooperation between the first push rod 31 and the movable mold core 221, the first push rod 31 also moves in the first direction perpendicular to the mold opening direction. At this time, the distance between the first push rod 31 and the driving rod 33 gradually decreases, and the driving rod 33 extends into the clearance groove 313, so that the first push rod 31 continues to move until the inner undercut 14 is completely disengaged from the second matching portion 321.

[0050] In this embodiment, the depth of the clearance groove 313 gradually increases along the moving direction of the driving rod 33, that is, the distance between the driving rod 33 and the bottom wall of the clearance groove 313 remains consistent, while meeting the stroke requirements of the first push rod 31 and reducing the production cost.

[0051] Combination Figure 5 and Figure 6 , while the first push rod 31 moves, the second push rod 32 is squeezed, and with the cooperation of the limiting structure 34, the second push rod 32 moves in the second direction perpendicular to the mold opening direction, that is, the second push rod 32 moves to the lower left. Among them, the limiting structure 34 includes a limiting block 341 arranged on the second push rod 32, and a limiting groove 342 for the limiting block 341 to slide is arranged on the driving rod 33 along the second direction perpendicular to the mold opening direction. Through the cooperation of the limiting block 341 and the limiting groove 342, the second push rod 32 can be driven to move along the mold opening direction and can be driven to move in the second direction perpendicular to the mold opening direction. And the length of the limiting groove 342 along the second direction perpendicular to the mold opening direction is greater than the length of the undercut, ensuring that the second matching portion 321 on the second push rod 32 can be smoothly pulled out from the inner undercut 14.

[0052] Since a mounting groove for the second push rod 32 to pass through is provided in the first push rod 31, when the first push rod 31 moves in a first direction perpendicular to the mold opening direction, the first push rod 31 squeezes the second push rod 32 in the mounting groove, and with the cooperation of the limit block 341 and the limit groove 342, the second push rod 32 is driven to move along the limit groove 342 in the second direction perpendicular to the mold opening direction until the second matching portion 321 is successfully pulled out of the inner undercut 14.

[0053] Among them, the limiting groove 342 extends to both ends of the driving rod 33, which is convenient for the installation and disassembly of the limiting block 341 and the second push rod 32; different second push rods 32 can be replaced according to the shape of the inner hook, which is convenient for operation and can also reduce production costs.

[0054] In addition, the demolding mechanism 3 also includes a pin plate 36, which is movably arranged in the movable mold 22 along the mold opening direction, and a space for the pin plate 36 to move is provided in the movable mold 22, and the space is greater than the depth of the inner undercut 14 and the outer undercut 15. The pin plate 36 is connected to the mold driving component, and the first ejector rod 31 and the ejector rod are fixedly arranged on the pin plate 36.

[0055] After the movable mold 22 and the fixed mold 21 are opened, the mold driving component drives the ejector plate 36 to move in the mold opening direction, thereby driving the first ejector pin 31 and the driving rod 33 to move in the mold opening direction. Due to the sliding cooperation between the first ejector pin 31 and the movable mold core 221, the first ejector pin 31 moves in the mold opening direction and also moves in a first direction perpendicular to the mold opening direction, which facilitates the side wall of the first ejector pin 31 to separate from the first surface 11 of the shell 1 and to separate the first matching portion 311 from the outer undercut 15; at the same time, the driving rod 33 drives the second ejector pin 32 to move in the mold opening direction. Since the second ejector pin 32 is arranged in the first ejector pin 31, the second ejector pin 32 is squeezed during the movement of the first ejector pin 31, and the second ejector pin 32 is driven to move in a second direction perpendicular to the mold opening direction under the cooperation of the limit block 341 and the limit groove 342, so that the second matching portion 321 is separated from the inner undercut 14, thereby realizing the demolding of the shell 1.

[0056] It should be noted that when the second surface 12 or the third surface 13 of the shell 1 also has an internal undercut 14, the above-mentioned scheme can be adopted on the second surface 12 or the third surface 13, that is, three groups of demolding mechanisms 3 are arranged in the movable mold 22, and the first push rod 31 and the second push rod 32 of each group of demolding mechanisms 3 are formed with a partial product cavity; the inclined push rod scheme can also be adopted, which is a prior art.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mold for processing a shell with front and back undercuts, the shell comprising at least three continuous surfaces, and at least one surface is provided with inner undercuts and outer undercuts in different directions, characterized in that: The mold includes a movable mold and a fixed mold that cooperate with each other, a movable mold core and a demoulding mechanism are arranged in the movable mold, and the demoulding mechanism includes a first ejector rod and a second ejector rod, a first matching portion with an external undercut structure is arranged on the side wall of the first ejector rod, and one end of the first ejector rod is connected to the mold driving member, so that the first ejector rod moves in a mold opening direction and a first direction perpendicular to the mold opening direction at the same time under the action of the mold driving member; The second push rod is arranged along a first direction perpendicular to the mold opening direction and is inclined to a first plane perpendicular to the mold opening direction. One end of the second push rod is connected to a driving rod, and the other end extends into the first push rod and is provided with a second matching portion with an internal buckle structure. The other end of the driving rod is connected to the mold driving member, and a limiting structure is arranged between the driving rod and the second ejector rod. The second ejector rod moves in the mold opening direction under the action of the mold driving member and the driving rod, and moves in a second direction perpendicular to the mold opening direction under the action of the limiting structure and the first ejector rod, so that the second mating part is disengaged from the internal undercut.

2. A mold for processing a shell with front and back inverted buckles according to claim 1, characterized in that: A sliding block is obliquely arranged on the first push rod along the mold opening direction, and a sliding groove slidably matched with the sliding block is arranged on the movable mold core; or, a sliding groove is obliquely arranged on the first push rod along the mold opening direction, and a sliding block extending into the sliding groove is arranged on the movable mold core.

3. A mold for processing a shell with front and back inverted buckles according to claim 2, characterized in that: The side wall of the first push rod close to the driving rod is arranged obliquely with respect to the mold opening direction and abuts against the movable mold core.

4. A mold for processing a shell with front and back inverted buckles according to claim 1, characterized in that: An oblique rod is arranged between the first ejector rod and the mold driving member, and the oblique rod is arranged obliquely along the mold opening direction.

5. A mold for processing a shell with front and back inverted buckles according to claim 3 or 4, characterized in that: A side wall of the first push rod close to the driving rod is provided with a clearance groove, which extends along the mold opening direction. When the first push rod moves, the driving rod is located in the clearance groove.

6. A mold for processing a shell with front and back inverted buckles according to claim 5, characterized in that: The depth of the clearance groove gradually increases along the moving direction of the driving rod.

7. The mold for processing a shell with front and back inverted buckles according to claim 1, characterized in that: The limiting structure includes a limiting block arranged on the second push rod, and a limiting groove for sliding the limiting block is arranged on the driving rod along a second direction perpendicular to the mold opening direction, and the length of the limiting groove along the second direction perpendicular to the mold opening direction is greater than the length of the inner undercut.

8. A mold for processing a shell with front and back inverted buckles according to claim 7, characterized in that: The limiting groove extends to both ends of the driving rod.

9. The mold for processing a housing with front and back inverted buckles according to claim 1, characterized in that: The demoulding mechanism also includes an ejector plate, which is movably arranged in the movable mold along the mold opening direction, the ejector plate is connected to the mold driving component, and the first ejector rod and the ejector rod are both fixedly arranged on the ejector plate.

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