Handle expanding mold

Abstract

The utility model discloses a handle expanding mold which comprises an upper mold assembly and a lower mold assembly, the upper mold assembly comprises an upper mold base and an upper mold block, the lower mold assembly comprises a lower mold base and a lower mold block, and a mold core is movably arranged above the lower mold block; the mold core can move up and down relative to the lower mold block, a positioning groove is formed in the outer wall of the mold core, a mold cavity is concavely formed in the bottom of the upper mold block, a receding groove is concavely formed in the mold cavity, and when the upper mold block and the lower mold block are closed, the receding groove and the positioning groove jointly define an expanding space for containing a hollow handle; a first water injection pipe and a second water injection pipe penetrate through the lower module, when the upper module and the lower module are closed, the first water injection pipe is hermetically communicated with a first port of the hollow handle, and the second water injection pipe is hermetically communicated with a second port of the hollow handle; and an ejection assembly for ejecting out the hollow handle is also assembled in the lower module. The hollow handle can be expanded to a target contour, recesses and wrinkles at the bent position are accurately eliminated, and the quality of the hollow handle is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to a handle expansion mold. Background Art

[0002] Traditional stainless steel handles are mostly solid structures with high costs. In order to reduce costs, manufacturers have switched to using hollow tubes to bend handles. However, when using hollow tubes to bend handles, dents and wrinkles will appear at the bend of the handle during the bending process, seriously affecting the appearance quality of the hollow handle. Summary of the invention

[0003] The utility model aims to solve the problem that hollow tubes are used to bend handles in the prior art, and that depressions and wrinkles may appear at the bends of the hollow handles. The utility model provides a handle expansion mold to eliminate the depressions and wrinkles and improve the quality of the handle. The purpose of the utility model is achieved through the following technical solutions:

[0004] A handle expansion mold, which includes an upper mold assembly and a lower mold assembly, the upper mold assembly includes an upper mold base, and an upper mold block fixedly arranged below the upper mold base, the lower mold assembly includes a lower mold base, and a lower mold block fixedly arranged above the lower mold base, and a mold core is movably arranged above the lower mold block; the mold core can move up and down relative to the lower mold block, and a positioning groove for embedding a hollow handle is opened on the outer wall of the mold core, and a mold cavity for accommodating the mold core is recessed at the bottom of the upper mold block, and a recessed groove for making way for the hollow handle is recessed in the mold cavity. When the upper mold block and the lower mold block are molded together, the recessed groove and the positioning groove jointly define an expansion space for accommodating the hollow handle; a first water injection pipe and a second water injection pipe are penetrated in the lower mold block, and when the upper mold block and the lower mold block are molded together, the first water injection pipe is sealed and connected to the first port of the hollow handle, and the second water injection pipe is sealed and connected to the second port of the hollow handle; a ejecting assembly for ejecting the hollow handle is also assembled in the lower mold block.

[0005] Preferably, the positioning groove is a U-shaped groove opened on the outer wall of the mold core, and the positioning groove includes a horizontal section opened on the upper wall of the mold core, and a first vertical section opened on the first side wall of the mold core, and a second vertical section opened on the second side wall of the mold core. The first vertical section is connected to the horizontal section through a first arc section, and the second vertical section is connected to the horizontal section through a second arc section. The first arc section and the second arc section are consistent with the target arc after the bending part of the hollow handle is expanded.

[0006] Preferably, the first vertical section and the second vertical section both extend to the lower end surface of the mold core, and when the upper module and the lower module are molded together, the first water outlet nozzle at the upper end of the first water outlet pipe enters the first vertical section and is inserted into the first port of the hollow handle, and the second water outlet nozzle at the upper end of the second water outlet pipe enters the second vertical section and is inserted into the second port of the hollow handle.

[0007] Preferably, the relief groove is a U-shaped groove, which is arranged in the middle of the mold cavity and is aligned with the positioning groove. The expansion space is adapted to the target profile of the hollow handle after expansion.

[0008] Preferably, a positioning pin extending vertically is assembled on the lower module, and a positioning hole cooperating with the positioning pin is formed in the mold core.

[0009] Preferably, the ejector assembly includes an ejector block and an ejector spring. An assembly hole penetrating up and down is formed in the lower module. The ejector block and the ejector spring are assembled in the assembly hole, and the ejector block is fixedly arranged below the mold core.

[0010] Preferably, the ejector block includes an anti-detachment seat and an ejector post. The assembly hole includes a reduced-diameter section and an enlarged-diameter section. The diameter of the reduced-diameter section is adapted to the outer diameter of the ejector post, and the diameter of the enlarged-diameter section is adapted to the outer diameter of the anti-detachment seat; the ejector spring is assembled in the enlarged-diameter section. The upper end of the ejector spring abuts against the bottom wall of the anti-detachment seat, and the lower end of the ejector spring abuts against the upper end surface of the lower mold base.

[0011] Preferably, a first water channel communicated with the first water injection pipe and a second water channel communicated with the second water injection pipe are opened in the lower mold base. Both the first water channel and the second water channel extend horizontally.

[0012] Compared with the prior art, the utility model has the following technical effects: The structure of the expansion mold is reasonably arranged. A positioning groove is arranged on the mold core, and a relief groove is arranged in the mold cavity. After the upper and lower modules are clamped, the positioning groove and the limiting groove define the expansion space of the hollow handle. Then, the hollow handle can be expanded to the target profile by water expansion, accurately eliminating the depressions and wrinkles at the bending places, and effectively improving the quality of the hollow handle; the position of the water injection pipe is reasonably arranged. After the upper and lower modules are clamped, the connection between the water injection pipe and the hollow handle can be realized, and the operation is simple and efficient; the setting of the ejector assembly can realize the up and down movement of the mold core, realize the connection between the hollow handle and the water injection pipe during clamping, and realize the separation between the hollow handle and the water injection pipe during mold opening, and the operation is convenient. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the utility model;

[0014] Figure 2 is a sectional view of the utility model;

[0015] Figure 3 is a schematic structural diagram of the lower mold assembly in the utility model;

[0016] Figure 4 is a schematic structural diagram of the mold core and the ejector assembly in the utility model;

[0017] Figure 5 is a schematic structural diagram of the upper mold assembly in the utility model;

[0018] Markings in the figure: upper die holder 10; upper die block 20; die cavity 21; relief groove 22; die core 30; positioning groove 31; lower die block 40; assembly hole 41; positioning pin 42; lower die holder 50; first water channel 51; second water channel 52; first water injection pipe 61; second water injection pipe 62; ejector block 71; anti - detachment seat 711; ejector pin 712; ejector spring 72; hollow handle 80. Specific embodiments

[0019] The present utility model will be further described below in conjunction with the embodiments shown in the accompanying drawings:

[0020] See Figures 1 - 5 , the present utility model discloses a handle bulging die, which cooperates with a water swelling machine to perform a bulging process on the hollow handle 80. It includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper die holder 10 and an upper die block 20 fixed below the upper die holder 10. The lower die assembly includes a lower die holder 50 and a lower die block 40 fixed above the lower die holder 50. A die core 30 is movably arranged above the lower die block 40.

[0021] The die core 30 can move up and down relative to the lower die block 40. A positioning groove 31 for clamping the hollow handle 80 is provided on the outer wall of the die core 30. A die cavity 21 for accommodating the die core 30 is recessed at the bottom of the upper die block 20. A relief groove 22 for making way for the hollow handle 80 is recessed in the die cavity 21. When the upper die block 20 and the lower die block 40 are closed, the relief groove 22 and the positioning groove 31 jointly define a bulging space for accommodating the hollow handle 80. A first water injection pipe 61 and a second water injection pipe 62 are passed through the lower die block 40. When the upper die block 20 and the lower die block 40 are closed, the first water injection pipe 61 is hermetically connected to the first port of the hollow handle 80, and the second water injection pipe 62 is hermetically connected to the second port of the hollow handle 80.

[0022] The positioning groove 31 is a U - shaped groove opened on the outer wall of the die core 30. The positioning groove 31 includes a horizontal section opened on the upper wall of the die core 30, a first vertical section opened on the first side wall of the die core 30, and a second vertical section opened on the second side wall of the die core 30. The first vertical section and the horizontal section are connected by a first arc section, and the second vertical section and the horizontal section are connected by a second arc section. The first arc section and the second arc section are consistent with the target radian after bulging at the bending part of the hollow handle 80. The relief groove 22 is a U - shaped groove, arranged in the middle of the die cavity 21 and aligned with the positioning groove 31. The bulging space is adapted to the target contour of the hollow handle 80 after bulging. After the upper and lower die blocks 40 are closed, the positioning groove 31 and the limiting groove define the bulging space of the hollow handle 80. Then, by using water swelling, the hollow handle 80 can be bulged to the target contour, accurately eliminating the depression and wrinkles at the bending part, and effectively improving the quality of the hollow handle 80.

[0023] Both the first vertical section and the second vertical section extend to the lower end face of the mold core 30. When the upper mold 20 and the lower mold 40 are closed, the first water outlet nozzle at the upper end of the first water outlet pipe enters the first vertical section and is inserted into the first port of the hollow handle 80, and the second water outlet nozzle at the upper end of the second water outlet pipe enters the second vertical section and is inserted into the second port of the hollow handle 80. While positioning the hollow handle 80, the first vertical section and the second vertical section can also guide and position the first water injection pipe 61 and the second water injection pipe 62, so that after the upper and lower molds 40 are closed, the communication between the water injection pipe and the hollow handle 80 can be realized, and the operation is simple and efficient. In order to improve the concentricity of the mold, make the water injection pipe and the hollow handle 80 accurately aligned and communicated, and ensure the consistency of the bulging space, a positioning pin 42 extending vertically is assembled on the lower mold 40, and a positioning hole matching the positioning pin 42 is opened in the mold core 30. The mold core 30 moves up and down under the guidance of the positioning pin 42.

[0024] A knockout assembly for ejecting the hollow handle 80 is also assembled in the lower mold 40. The knockout assembly includes a knockout block 71 and a knockout spring 72. An assembly hole 41 penetrating up and down is opened in the lower mold 40. The knockout block 71 and the knockout spring 72 are assembled in the assembly hole 41, and the knockout block 71 is fixedly arranged below the mold core 30. Preferably, the knockout block 71 includes an anti-detachment seat 711 and a knockout post 712. The assembly hole 41 includes a reduced-diameter section and an enlarged-diameter section. The diameter of the reduced-diameter section is adapted to the outer diameter of the knockout post 712, and the diameter of the enlarged-diameter section is adapted to the outer diameter of the anti-detachment seat 711. The knockout spring 72 is assembled in the enlarged-diameter section. The upper end of the knockout spring 72 abuts against the bottom wall of the anti-detachment seat 711, and the lower end of the knockout spring 72 abuts against the upper end face of the lower mold base 50. The setting of the knockout assembly can realize the up and down movement of the mold core 30, realize the communication between the hollow handle 80 and the water injection pipe and the formation of the bulging space during mold closing, and realize the separation between the hollow handle 80 and the water injection pipe during mold opening. The operation is convenient. The mold core 30 drives the hollow handle 80 to move down together under the push of the upper mold assembly. During the downward movement of the mold core 30, the knockout spring 72 is compressed. After mold closing, the bulging space is formed, the water injection pipe is communicated with the hollow handle 80, and the hydroforming machine starts to inject water for hydroforming. After the hydroforming is completed and the wrinkles are eliminated, the mold is opened. After mold opening, the knockout spring 72 pushes the knockout block 71 and the mold core 30 to move up, and the hollow handle 80 is separated from the two water injection pipes, and then the hollow handle 80 can be taken off.

[0025] A first water channel 51 communicated with the first water injection pipe 61 and a second water channel 52 communicated with the second water injection pipe 62 are opened in the lower mold base 50. Both the first water channel 51 and the second water channel 52 extend horizontally and are communicated with the hydroforming machine.

[0026] It should be understood that in the claims and the specification of the present utility model, all "including..." should be understood in an open sense, that is, it is equivalent to "at least including...", rather than in a closed sense, that is, it should not be understood as "only including...". The terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0027] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present utility model should all be covered within the protection scope of the utility model.

Claims

1. A handle expansion mold, comprising an upper mold assembly and a lower mold assembly, characterized in that: The upper mold assembly includes an upper mold base and an upper mold block fixedly arranged below the upper mold base, the lower mold assembly includes a lower mold base and a lower mold block fixedly arranged above the lower mold base, and a mold core is movably arranged above the lower mold block; the mold core can move up and down relative to the lower mold block, and a positioning groove for embedding the hollow handle is opened on the outer wall of the mold core; a mold cavity for accommodating the mold core is recessed at the bottom of the upper mold block, and a makeshift groove for making way for the hollow handle is recessed in the mold cavity. When the upper mold block and the lower mold block are molded together, the makeshift groove and the positioning groove jointly define an expansion space for accommodating the hollow handle; a first water injection pipe and a second water injection pipe are penetrated in the lower mold block, and when the upper mold block and the lower mold block are molded together, the first water injection pipe is sealed and connected to the first port of the hollow handle, and the second water injection pipe is sealed and connected to the second port of the hollow handle; a ejecting assembly for ejecting the hollow handle is also assembled in the lower mold block.

2. A handle expansion mold according to claim 1, characterized in that: The positioning groove is a U-shaped groove opened on the outer wall of the mold core. The positioning groove includes a horizontal section opened on the upper wall of the mold core, a first vertical section opened on the first side wall of the mold core, and a second vertical section opened on the second side wall of the mold core. The first vertical section is connected to the horizontal section through a first arc section, and the second vertical section is connected to the horizontal section through a second arc section. The first arc section and the second arc section are consistent with the target arc after the bending part of the hollow handle is expanded.

3. A handle expansion mold according to claim 2, characterized in that: The first vertical section and the second vertical section both extend to the lower end surface of the mold core. When the upper module and the lower module are molded together, the first water outlet nozzle at the upper end of the first water outlet pipe enters the first vertical section and is inserted into the first port of the hollow handle, and the second water outlet nozzle at the upper end of the second water outlet pipe enters the second vertical section and is inserted into the second port of the hollow handle.

4. A handle expansion mold according to claim 3, characterized in that: The give way groove is a U-shaped groove, which is arranged in the middle of the mold cavity and is aligned with the positioning groove. The expansion space is adapted to the target contour of the hollow handle after expansion.

5. The handle expansion mold according to claim 1, characterized in that: The lower module is equipped with a positioning pin extending in the vertical direction, and the mold core is provided with a positioning hole matched with the positioning pin.

6. A handle expansion mold according to any one of claims 1 to 5, characterized in that: The ejection assembly comprises an ejection block and an ejection spring. An assembly hole which passes through the lower module is provided in the lower module. The ejection block and the ejection spring are assembled in the assembly hole. The ejection block is fixedly arranged below the mold core.

7. A handle expansion mold according to claim 6, characterized in that: The ejection block includes an anti-slip seat and a ejection column, the assembly hole includes a reduced diameter section and an expanded diameter section, the aperture of the reduced diameter section is adapted to the outer diameter of the ejection column, and the aperture of the expanded diameter section is adapted to the outer diameter of the anti-slip seat; the ejection spring is assembled in the expanded diameter section, the upper end of the ejection spring abuts against the bottom wall of the anti-slip seat, and the lower end of the ejection spring abuts against the upper end surface of the lower die seat.

8. The handle expansion mold according to claim 1, characterized in that: A first water channel connected to the first water injection pipe and a second water channel connected to the second water injection pipe are opened in the lower mold base, and both the first water channel and the second water channel extend in the horizontal direction.

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