A double-irregular-hole synchronous undercut injection mold for a shell piece of a sweeping robot

Abstract

The application discloses a double-irregular-hole synchronous undercut injection mold for a shell part of a sweeping robot, which comprises a lower mold base, an upper mold base, a first mold body for injection positioning and forming of a first irregular hole of the shell part, a second mold body for injection positioning and forming of a second irregular hole of the shell part, and an edge shaping mechanism which is driven by the lifting seat to synchronously lift together with the first mold body and the second mold body, and which is used for blow molding and cooling secondary forming of the edges of the first irregular hole and the second irregular hole after injection of the injection device. Compared with common injection molds, the blow molding structure which is arranged outside the mold body for injection positioning of the irregular hole of the workpiece and moves together with the mold body and is associated with the mold body can be used for blow molding and cooling secondary forming of the irregular hole of the workpiece after demolding, so that quality problems such as warping, deformation and burrs of the edges of the irregular hole are avoided.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a dual-shaped hole synchronous cutting injection mold for the outer shell of a sweeping robot. Background Technology

[0002] To ensure a stable connection between the shell and related structures, allow for the flow of gases, dust, and other substances to the outside world, and guarantee efficient dirt collection, the shell of a sweeping robot often features holes of varying shapes and sizes. Some of these irregularly shaped holes are complex, and during the injection molding process, factors such as friction between the shell and the inner wall of the device, as well as gaps, can cause quality problems such as warping, deformation, and burrs at the edges of these irregularly shaped holes. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that the complex structure of some irregular holes causes quality defects such as warping, deformation, and burrs at the edges of the irregular holes due to friction and gaps between the irregular hole and the inner wall of the device during the injection molding process of the shell. Therefore, this invention provides a dual irregular hole synchronous cutting injection mold for the shell parts of a sweeping robot.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-shaped hole synchronous cutting injection mold for the outer shell of a sweeping robot, comprising:

[0005] Lower mold base;

[0006] The upper mold base is connected to the lower mold base via a lifting guide column connected by a drive device. A movable cavity is provided on the bottom surface, and a mounting seat is provided at the bottom of the movable cavity. A lifting seat is connected to the movable cavity via a drive device.

[0007] The first mold body is slidably connected in the first movable hole of the mounting base for injection molding positioning of the first irregular hole of the outer shell part;

[0008] The second mold body is slidably connected in the second movable hole of the mounting base for injection molding positioning of the second irregular hole of the outer shell part;

[0009] The edge shaping mechanism, which moves up and down synchronously with the first mold body and the second mold body driven by the lifting seat, includes a first blow molding structure located outside the first mold body and a second blow molding structure located outside the second mold body. After injection molding by the injection molding device, when the lifting seat rises and demolds, the edges of the first and second irregular holes are blow molded and cooled for secondary shaping.

[0010] As a further description of the above technical solution:

[0011] A mold plate is detachably provided on the top of the lower mold base, and a mold cavity matching the shape of the outer shell is provided on the mold plate.

[0012] As a further description of the above technical solution:

[0013] The first blow-molded structure includes a first isolator and a first sealing member at the bottom of the first isolator, which are tightly fitted and slidably connected to the first transformer cavity of the mounting base. The end of the first isolator is connected to the lifting base.

[0014] As a further description of the above technical solution:

[0015] The first sealing member is tightly inserted into the first connecting hole extending downward at the bottom of the first transformer cavity. A wedge-shaped guide surface is provided on the side of the first connecting hole away from the first mold body, and the wedge-shaped guide surface extends toward the first mold body.

[0016] As a further description of the above technical solution:

[0017] The second mold body is an inverted tower-shaped structure, and the second movable hole is an inverted tower-shaped hole. The second mold body includes a connecting block, a guide block, a limiting block and a mold body arranged from top to bottom. The connecting block is connected to the lifting seat, the guide block is tightly attached to and slidably connected to the top of the second movable hole, and the limiting block abuts against the inner side of the bottom opening of the second movable hole.

[0018] As a further description of the above technical solution:

[0019] The second blow molding structure is connected to the side of the second mold body and includes a second spacer that is annularly attached to and slidably connected between the second mold body and the second movable hole, and a second sealing member that connects the second mold body and the second spacer.

[0020] As a further description of the above technical solution:

[0021] The second sealing member is tightly inserted into the second connecting hole extending downward on the second movable hole. The second connecting hole has a wedge-shaped guide surface on its side away from the second mold body, and the wedge-shaped guide surface extends toward the second mold body.

[0022] As a further description of the above technical solution:

[0023] A second transformer cavity is formed between the bottom of the second movable hole and the second isolation member.

[0024] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0025] Compared to common injection molds, this device features a blow molding structure that moves and connects with the outer side of the mold body used for injection positioning at irregular holes in the workpiece. This allows for secondary blow molding and cooling of the irregular holes in the workpiece during demolding after injection molding, avoiding quality problems such as warping, deformation, and burrs at the edges of the irregular holes caused by friction with the inner wall of the device and gaps. Furthermore, before mold closing, the mold cavity inside the mold can be cleaned by synchronous airflow, improving the injection molding effect and the quality of the workpiece molding. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the connection relationship between the first mold body, the second mold body, and the outer shell in a dual-shaped hole synchronous cutting injection mold for the outer shell of a robotic vacuum cleaner.

[0028] Figure 2 This is a schematic diagram of the structure of a vacuum cleaner shell part manufactured by injection molding using a dual-shaped hole synchronous cutting injection mold.

[0029] Figure 3 For a dual-shaped hole synchronous cutting injection mold for the outer shell of a robotic vacuum cleaner, in the mold opening state... Figure 1 Front view sectional view at section AA.

[0030] Figure 4 For a dual-shaped hole synchronous cutting injection mold for the outer shell of a robotic vacuum cleaner, the upper mold base is in Figure 3 Top view of the BB section.

[0031] Figure 5 for Figure 3 Enlarged view of point C in the middle.

[0032] Figure 6 For a dual-shaped hole synchronous cutting injection mold for the outer shell of a robotic vacuum cleaner, in the fully closed state... Figure 1 Front view sectional view at section AA.

[0033] Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0034] Legend:

[0035] 1. Lower mold base; 2. Upper mold base; 21. Movable cavity; 22. Mounting seat; 23. First movable hole; 24. First transformer cavity; 241. First connecting hole; 25. Second movable hole; 251. Second connecting hole; 3. Lifting guide column; 4. Mold plate; 41. Mold cavity; 5. Lifting seat; 51. Drive device; 6. First mold body; 7. Second mold body; 71. Connecting block; 72. Guide block; 73. Limiting block; 74. Mold body; 8. First blow molding structure; 81. First isolation component; 82. First sealing component; 9. Second blow molding structure; 91. Second sealing component; 92. Second isolation component; 10. Outer shell; 101. First irregular hole; 102. Second irregular hole. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Example 1:

[0039] Please see Figure 1-7 This invention provides a technical solution: a dual-shaped hole synchronous cutting injection mold for the outer shell of a sweeping robot, comprising:

[0040] Lower mold base 1;

[0041] The upper mold base 2 is connected to the lower mold base 1 via a lifting guide column 3 connected by a drive device. A movable cavity 21 is provided on the bottom surface. A mounting seat 22 is provided at the bottom of the movable cavity 21. A lifting seat 5 is connected to the movable cavity 21 via a drive device 51.

[0042] The first mold body 6 is slidably connected in the first movable hole 23 of the mounting base 22 for injection positioning and molding of the first irregular hole 101 of the outer shell 10;

[0043] The second mold body 7 is slidably connected in the second movable hole 25 of the mounting base 22 for injection positioning and molding of the second irregular hole 102 of the outer shell 10;

[0044] The edge shaping mechanism, which is driven to rise and fall synchronously with the first mold body 6 and the second mold body 7 by the lifting seat 5, includes a first blow molding structure 8 located outside the first mold body 6 and a second blow molding structure 9 located outside the second mold body 7. After injection molding by the injection molding device, when the lifting seat 5 rises and demolds, the edges of the first irregular hole 101 and the second irregular hole 102 are blow molded and cooled for secondary shaping.

[0045] During injection molding, the upper mold base 2 moves downward and closes with the lower mold base 1 via the lifting guide column 3. At this time, the first mold body 6 and the second mold body 7 do not extend out of the corresponding movable holes. Specifically, as shown in the figure... Figure 3 , 5 As shown, as the two mold bodies move downwards, the connection between the first blow molding structure 8 and the second blow molding structure 9 and the outside world closes, and the internal cavity pressure continuously increases. After the two mold bodies are in place, they abut and position with the mold cavity of the lower mold base 1, and injection molding can then be performed, as detailed below. Figure 6 , 7 After injection molding, the blow molding structure opens, creating a pressure difference between the internal high-pressure gas and the mold cavity. The resulting airflow performs blow molding and cooling on the edges of the first irregular hole 101 and the second irregular hole 102, resulting in secondary molding. The two irregular holes of the outer shell 10 are simultaneously cut and injection molded, avoiding quality problems such as deformation, warping, and burrs at the edges of the irregular holes due to friction between the structure and the injection molded part when the injection mold opens. After injection molding, depending on the specific injection molding effect, the corresponding processing steps for the upper mold base 2 to move upward to open the mold and the mold body to move upward to demold are designed. However, it should be ensured that the opening of the blow molding structure is open when the outer shell 10 is demolded to ensure the efficiency of secondary molding.

[0046] In actual use, if the lower mold base 1 and the upper mold base 2 are not closed when the blow molding structure moves down, the gas at the opening of the blow molding structure can be discharged, and the mold cavity in the lower mold base 1 can be blown clean to ensure that the inside is clean, thereby improving the injection molding effect and the quality of the finished shell part 10.

[0047] The lower mold base 1 is detachably provided with a mold plate 4. The mold plate 4 is provided with a mold cavity 41 that matches the shape of the outer shell 10, which facilitates the injection mold to perform injection molding on workpieces of different sizes and shapes.

[0048] Example 2:

[0049] Please see Figure 3-7 Based on the above embodiment 1, in order to ensure the secondary molding effect of blow molding cooling at the edge of the first irregular hole 101, preferably, the first blow molding structure 8 specifically includes a first isolation member 81 tightly attached to and slidably connected in the first transformer cavity 24 of the mounting base 22 and a first sealing member 82 at the bottom of the first isolation member 81, with the end of the first isolation member 81 connected to the lifting base 5.

[0050] The first sealing element 82 is tightly inserted into the first connecting hole 241 extending downward from the bottom of the first transformer cavity 24. The first connecting hole 241 is provided with a wedge-shaped guide surface on the side away from the first mold body 6, and the wedge-shaped guide surface extends toward the first mold body 6.

[0051] When the upper mold base 2 moves down to close the mold, the first isolation member 81 moves down synchronously with the mounting base 22, pushing out the gas inside the first transformer cavity 24 to clean the mold cavity. As it continues to move down, the first sealing member 82 inserts into the first connecting hole 241, causing the opening of the first blow molding structure 8 to gradually shrink. Pressure begins to build up inside the first transformer cavity 24. When the wedge-shaped guide surface of the first sealing member 82 and the first connecting hole 241 completely abuts and closes, the opening of the first blow molding structure 8 closes, allowing injection molding to proceed. After injection molding, the first sealing member 82 moves up, and the first connecting hole 241 reopens. The airflow formed by the pressure difference, guided by the wedge-shaped guide surface, flows towards the edge of the first irregular hole 101, impacting and shaping it. This allows for secondary cooling and shaping of structural defects such as burrs at that location. To ensure cooling effectiveness, a cooling mechanism can be installed inside the first transformer cavity 24. Based on actual production conditions, a wedge-shaped guide surface with the same orientation can be set opposite the wedge-shaped guide surface of the first connecting hole 241 to further improve the flow guidance and blow molding effect of the first irregular hole 101. The additional injection molding structure at the first irregular hole 101 caused by the gap formed between the wedge-shaped guide surface and the first sealing member 82 can be wiped away and reshaped by the airflow guided by the wedge-shaped guide surface.

[0052] Example 3:

[0053] Continue reading Figure 3-7 Based on the above embodiment 1, preferably, the second mold body 7 is an inverted tower-shaped structure, the second movable hole 25 is an inverted tower-shaped hole, and the second mold body 7 includes a connecting block 71, a guide block 72, a limiting block 73 and a mold body 74 arranged from top to bottom. The connecting block 71 is connected to the lifting seat 5, the guide block 72 is closely attached to and slidably connected to the top of the second movable hole 25, and the limiting block 73 abuts against the inner side of the bottom opening of the second movable hole 25. For injection molding of some irregular holes with complex shapes and large contact areas with the corresponding movable holes, this design can significantly reduce the sliding resistance of the mold body.

[0054] Example 4:

[0055] Continue reading Figure 3-7 Based on the above embodiment 1, preferably, the second blow molding structure 9 is connected to the side of the second mold body 7, including a second isolation member 92 that is annular, closely attached to and slidably connected between the second mold body 7 and the second movable hole 25, and a second sealing member 91 that connects the second mold body 7 and the second isolation member 92.

[0056] The second sealing member 91 is tightly inserted into the second connecting hole 251 extending downward on the second movable hole 25. The second connecting hole 251 is provided with a wedge-shaped guide surface on the side away from the second mold body 7, and the wedge-shaped guide surface extends toward the second mold body 7.

[0057] A second transformer cavity is formed between the bottom of the second movable hole 25 and the second isolation member 92.

[0058] The working mechanism of the second blow molding structure 9 is similar to that of the first blow molding structure 8. It also involves the downward movement of the sealing component to clean the mold cavity with airflow. When the opening of the structure is closed, pressure is applied. After injection molding, when the opening reopens, the second irregular hole 102 undergoes secondary cooling and shaping. Because the structure of the second irregular hole 102 is more complex, its distribution on the outside of the irregular hole is denser than that of the first blow molding structure 8, ensuring full coverage of the blow molding cooling at the edge of the irregular hole. For specific improvements to the production structure and explanations of the working mechanism, please refer to Example 2 based on the corresponding structure.

[0059] In summary, due to the adoption of the above technical solution, the dual-shaped hole synchronous cutting injection mold for the outer shell of a sweeping robot in this embodiment has the following advantages compared with the prior art:

[0060] Compared to common injection molds, this device features a blow molding structure that moves and connects with the outer side of the mold body used for injection positioning at irregular holes in the workpiece. This allows for secondary blow molding and cooling of the irregular holes in the workpiece during demolding after injection molding, avoiding quality problems such as warping, deformation, and burrs at the edges of the irregular holes caused by friction with the inner wall of the device and gaps. Furthermore, before mold closing, the mold cavity inside the mold can be cleaned by synchronous airflow, improving the injection molding effect and the quality of the workpiece molding.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual-shaped hole synchronous cutting injection mold for the outer shell of a sweeping robot, characterized in that, include: Lower mold base; The upper mold base is connected to the lower mold base via a lifting guide column connected by a drive device. A movable cavity is provided on the bottom surface, and a mounting seat is provided at the bottom of the movable cavity. A lifting seat is connected to the movable cavity via a drive device. The first mold body is slidably connected in the first movable hole of the mounting base for injection molding positioning of the first irregular hole of the outer shell part; The second mold body is slidably connected in the second movable hole of the mounting base for injection molding positioning of the second irregular hole of the outer shell part; The edge shaping mechanism, which is synchronously raised and lowered with the first mold body and the second mold body by the lifting seat, includes a first blow molding structure located outside the first mold body and a second blow molding structure located outside the second mold body. After injection molding by the injection molding device, when the lifting seat rises and demolds, the edges of the first irregular hole and the second irregular hole are blow molded and cooled for secondary shaping. The second blow molding structure is connected to the side of the second mold body, including a second spacer that is annular, tightly fitted and slidably connected between the second mold body and the second movable hole, and a second sealing member that connects the second mold body and the second spacer; The second sealing member is tightly inserted into the second connecting hole extending downward on the second movable hole. A wedge-shaped guide surface is provided on the side of the second connecting hole away from the second mold body, and the wedge-shaped guide surface extends toward the second mold body. A second transformer cavity is formed between the bottom of the second movable hole and the second isolation member.

2. The injection mold for synchronous cutting of dual irregular holes for the outer shell of a sweeping robot according to claim 1, characterized in that, A mold plate is detachably provided on the top of the lower mold base, and a mold cavity matching the shape of the outer shell is provided on the mold plate.

3. The injection mold for synchronous cutting of dual irregular holes for the outer shell of a sweeping robot according to claim 1, characterized in that, The first blow-molded structure includes a first isolator and a first sealing member at the bottom of the first isolator, which are tightly fitted and slidably connected to the first transformer cavity of the mounting base. The end of the first isolator is connected to the lifting base.

4. The injection mold for synchronous cutting of dual irregular holes for the outer shell of a sweeping robot according to claim 3, characterized in that, The first sealing member is tightly inserted into the first connecting hole extending downward at the bottom of the first transformer cavity. A wedge-shaped guide surface is provided on the side of the first connecting hole away from the first mold body, and the wedge-shaped guide surface extends toward the first mold body.

5. The injection mold for synchronous cutting of dual irregular holes for the outer shell of a sweeping robot according to claim 1, characterized in that, The second mold body is an inverted tower-shaped structure, and the second movable hole is an inverted tower-shaped hole. The second mold body includes a connecting block, a guide block, a limiting block and a mold body arranged from top to bottom. The connecting block is connected to the lifting seat, the guide block is tightly attached to and slidably connected to the top of the second movable hole, and the limiting block abuts against the inner side of the bottom opening of the second movable hole.

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