Injection mold for cutting metal strip in mold

Abstract

The utility model discloses an injection mold for cutting off a metal material strip in the mold. The injection mold comprises a mold frame, a lower mold arranged on the mold frame, an upper mold arranged on the lower mold and a demolding and internally cutting mechanism, a mold cavity is formed between the lower mold and the upper mold, and an injection molding opening communicated with the mold cavity is formed in the upper mold. The demolding internally-cutting mechanism comprises an ejector rod assembly, a cutting assembly, a demolding assembly and a sliding block assembly, wherein the sliding block assembly participates in driving the cutting assembly by the ejector rod assembly during mold closing and slides to avoid driving the demolding assembly by the ejector rod assembly during mold opening. According to the injection mold, cutting and demolding are switched through the sliding block assembly, so that the metal strip can be cut off in the mold, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an injection mold for in-mold cutting of a metal strip. Background Art

[0002] With the continuous development of the economy and the continuous improvement of the technical level, rich material conditions are provided for people, thus improving people's living standards. It also makes the demand for various electronic products increasingly strong, creating a good development platform for the development of electronic products. Among various electronic devices of electronic products, there are often terminal modules, and the terminal modules are used to achieve electrical connections between various components, various electronic devices or various electronic products.

[0003] The existing terminal modules usually include terminals and plastic parts. The forming method is usually to put the terminals with a strip into an injection mold for forming, and then cut off the strip after taking it out and entering the cutting station. This forming method reduces production efficiency and increases production costs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold for in-mold cutting of a metal strip.

[0005] To achieve the above utility model purpose, the utility model adopts the following technical scheme: an injection mold for in-mold cutting of a metal strip, which includes a mold base, a lower mold installed on the mold base, an upper mold installed on the lower mold, and a demolding and internal cutting mechanism. A mold cavity is formed between the lower mold and the upper mold. The upper mold is provided with an injection port communicating with the mold cavity. The demolding and internal cutting mechanism includes a ejector rod assembly, a cutting assembly, a demolding assembly, and a slider assembly that drives the cutting assembly when participating in the driving of the ejector rod assembly during mold closing and slides to avoid the ejector rod assembly to drive the demolding assembly during mold opening.

[0006] As a further improved technical scheme of the utility model, the ejector rod assembly includes a bottom plate, a first ejector rod, a first ejector pin plate, a second ejector rod, and a top plate. The first ejector rod is installed on the bottom plate and inserted into the first ejector pin plate. The second ejector rod is installed on the first ejector pin plate and inserted into the top plate.

[0007] As a further improved technical scheme of the utility model, the cutting assembly includes a cutting substrate, a cutting plate located on the cutting substrate, and a cutting knife installed on the cutting plate. The slider assembly includes a slider that can slide between the cutting substrate and the top plate.

[0008] As a further improved technical scheme of the utility model, the demolding assembly includes a second ejector pin plate parallel to the first ejector pin plate and arranged with a gap, and a plurality of ejector pins installed on the second ejector pin plate.

[0009] As a further improved technical solution of the present utility model, the initial spacing distance between the top plate and the cutting substrate is set as L1, the initial spacing distance between the first ejector plate and the second ejector plate is set as L2, and the rising distance of the cutting knife during cutting is set as L3. Then, L1 > L2 > L3.

[0010] As a further improved technical solution of the present utility model, the slider assembly includes a slide base slidably installed in the horizontal direction, a lifting base movably installed in the vertical direction, and a slider floatingly installed on the slide base. The slide base is provided with a first inclined surface, and the lifting base is provided with a second inclined surface that slidably cooperates with the first inclined surface.

[0011] As a further improved technical solution of the present utility model, two first springs for rebounding the slide base are installed in the slide base, and second springs for rebounding the lifting base are respectively installed on both sides of the lifting base.

[0012] As a further improved technical solution of the present utility model, the slide base is provided with a through hole for the lifting base to move up and down, and the first inclined surface is located in the through hole.

[0013] As a further improved technical solution of the present utility model, the slide base includes a wedge groove extending in the vertical direction, a first limit block fixed above the wedge groove, and a second limit block fixed below the wedge groove. The slider protrudes with a wedge block that is buckled in the wedge groove, and the wedge block can float up and down in the wedge groove and is limited by the first limit block and the second limit block.

[0014] As a further improved technical solution of the present utility model, three of the sliders are arranged side by side on one side of the slide base, and the slider assembly has two symmetrically arranged ones.

[0015] The beneficial effects of the present utility model are as follows: The injection mold realizes the cutting of the metal strip in the mold by switching cutting and demolding through the slider assembly, improving production efficiency and reducing production costs. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the injection mold for cutting the metal strip in the mold of the present utility model;

[0017] Figure 2 is a schematic internal diagram of the injection mold for cutting the metal strip in the mold of the present utility model in the closed mold state;

[0018] Figure 3 is a schematic internal diagram of the injection mold for cutting the metal strip in the mold of the present utility model during strip cutting;

[0019] Figure 4 is a schematic internal diagram of the injection mold for cutting the metal strip in the mold of the present utility model during product demolding;

[0020] Figure 5 is a schematic structural diagram of a slider assembly of an injection mold for in-mold cutting of a metal strip in the present utility model;

[0021] Figure 6 is Figure 5 a partial structural diagram from another angle. Specific embodiments

[0022] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings. Please refer to the drawings, which are the preferred embodiments of the present utility model. It should be noted, however, that these embodiments are not intended to limit the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 6 , the present utility model discloses an injection mold 100 for in-mold cutting of a metal strip, which includes a mold base 1, a lower mold 2 installed on the mold base 1, an upper mold 3 installed on the lower mold 2, a demolding and internal cutting mechanism, and a cover plate 9 covering the upper mold 3. A mold cavity (not shown) is formed between the lower mold 2 and the upper mold 3, and an injection port (not shown) communicating with the mold cavity is opened on the upper mold. The demolding and internal cutting mechanism includes a ejector rod assembly 4, a cutting assembly 5, a demolding assembly 6, and a slider assembly 7 that participates in driving the cutting assembly 5 when the mold is closed and slides to avoid the ejector rod assembly 4 when the mold is opened to drive the demolding assembly 6. The injection mold 100 realizes the cutting of the metal strip in the mold by switching between cutting and demolding through the slider assembly 7, improving production efficiency and reducing production costs.

[0024] The ejector rod assembly 4 includes a bottom plate 41, a first ejector rod 42, a first ejector pin plate 43, a second ejector rod 44, and a top plate 45. The first ejector rod 42 is installed on the bottom plate 41 and inserted into the first ejector pin plate 43, and the second ejector rod 44 is installed on the first ejector pin plate 43 and inserted into the top plate 45. The cutting assembly 5 includes a cutting substrate 51, a cutting plate 52 located on the cutting substrate 51, and a cutting knife 53 installed on the cutting plate 52. The demolding assembly 6 includes a second ejector pin plate 61 parallel to the first ejector pin plate 43 and arranged with a gap (initial position), and a plurality of ejector pins 62 installed on the second ejector pin plate 61.

[0025] The slider assembly 7 includes a slide base 71 slidably installed in the horizontal direction, a lifter base 72 movably installed in the vertical direction, and a slider 73 floatingly installed on the slide base 71. The slide base 71 is provided with a first inclined surface 711, and the lifter base 72 is provided with a second inclined surface 721 that slidably cooperates with the first inclined surface 711. The slider 73 can slide between the cutting substrate 51 and the top plate 45, and in the initial state, there is a gap between the slider 73 and the cutting substrate 51.

[0026] Two first springs 712 for rebounding the sliding seat 71 are installed inside the sliding seat 71. Two horizontally arranged spring holes 713 are arranged side by side inside the sliding seat 71, and the first springs 712 are installed inside the spring holes 713. One end of the first spring 712 is fixed to the sliding seat 71, and the other end is fixed to the lower mold 2. Second springs 722 for rebounding the shovel base 72 are installed on both sides of the shovel base 72. Ears 723 protrude from the side of the shovel base 72, and the second spring 722 is sleeved on a screw rod 724 and passes through the ears 723.

[0027] The sliding seat 71 is provided with a through hole 714 for the up and down movement of the shovel base 72. The first inclined surface 711 is located inside the through hole 714. When the shovel base 72 moves up and down, the second inclined surface 721 is in sliding cooperation with the first inclined surface 711 to drive the horizontal sliding of the sliding seat 71.

[0028] The sliding seat 71 includes a wedge groove 715 extending in the vertical direction, a first limit block 716 fixed above the wedge groove 715, and a second limit block 717 fixed below the wedge groove 715. A wedge block 731 buckling in the wedge groove 715 protrudes from the slider 73. The wedge block 731 can float up and down in the wedge groove 715 and is limited by the first limit block 716 and the second limit block 717. Three sliders 73 are arranged side by side on one side of the sliding seat 71. There are two symmetrically arranged slider assemblies 7, and the sliding seats 71 move relative to each other, approaching or moving away from each other.

[0029] Please continue to refer to Figures 1 to 6 , and describe the use of the injection mold 100 for cutting the metal strip in the mold.

[0030] Please refer to Figure 2 , during injection molding in the mold-closed state, at this time, the first ejector rod 42, the first ejector plate 43, the second ejector rod 44, the top plate 45, the cutting substrate 51, the cutting plate 52, the cutting knife 53, the second ejector plate 61, the ejector pin 62, the sliding seat 71, the shovel base 72, and the slider 73 are all in their initial positions. The first ejector plate 43 and the second ejector plate 61 are arranged with a gap, and the slider 73 and the cutting substrate 51 are arranged with a gap.

[0031] Please refer to Figure 3 , after the injection molding is completed, under the action of the ejector rod force of the machine table (not shown), the slider 73 is pushed upward through the first ejector rod 42, the first ejector plate 43, the second ejector rod 44, and the top plate 45. The wedge block 731 of the slider 73 moves upward along the wedge groove 715 of the sliding seat 71. The slider 73 pushes the cutting substrate 51 and the cutting plate 52, and then drives the cutting knife 53 to cut off the metal strip (not shown).

[0032] Please refer to Figure 4After the metal strip is cut, the upper and lower molds are separated, the cover plate 9 and the upper mold 3 are separated from the lower mold 2 and the mold frame 1, and the second spring 722 bounces the shovel base 72 upward. After the shovel base 72 is separated from the slide seat 71, the first spring 712 bounces the slide seat 71, and the slide seat 71 drives the slider 73 to bounce. The slider 73 slides outward from between the cutting substrate 51 and the top plate 45. Under the action of the ejector force of the machine, the second ejector plate 61 is pushed upward by the first ejector 42 and the first ejector plate 43, and then drives the ejector 62 to move the product (not shown) into the mold cavity.

[0033] The initial spacing distance between the top plate 45 and the cutting substrate 51 is set to L1, the initial spacing distance between the first ejector plate 42 and the second ejector plate 61 is set to L2, and the distance that the cutting knife 53 rises during cutting is set to L3, then, L1>L2>L3. During cutting, the first ejector plate 43 drives the top plate 45 to push the slider 73, and further pushes the cutting knife 53, because the slider 73 and the set distance make the first ejector plate 43 not push the second ejector plate 61. During demolding, the first ejector plate 43 pushes the second ejector plate 61 to demold, at this time the slider 73 has slid away, the top plate 45 cannot contact the slider 73 and will not push the cutting substrate 51 due to the distance. In this way, cutting and demolding can be carried out smoothly, and the metal strip can be cut in the mold, which improves production efficiency and reduces production costs.

[0034] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0035] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An injection mold for removing a metal strip in the mold, characterized in that, It includes a mold base, a lower mold installed on the mold base, an upper mold installed on the lower mold, and a demolding and internal cutting mechanism. A mold cavity is formed between the lower mold and the upper mold. The upper mold is provided with an injection port communicating with the mold cavity. The demolding and internal cutting mechanism includes a ejector rod assembly, a cutting assembly, a demolding assembly, and a slider assembly that drives the cutting assembly when participating in the driving of the ejector rod assembly during mold closing and slides to avoid the ejector rod assembly to drive the demolding assembly during mold opening.

2. The injection mold for in-mold cutting of a metal strip according to claim 1, wherein The ejector rod assembly includes a bottom plate, a first ejector rod, a first ejector plate, a second ejector rod, and a top plate. The first ejector rod is installed on the bottom plate and inserted into the first ejector plate. The second ejector rod is installed on the first ejector plate and inserted into the top plate.

3. The injection mold for in-mold cutting of a metal strip according to claim 2, characterized in that, The cutting assembly includes a cutting substrate, a cutting plate located on the cutting substrate, and a cutting knife installed on the cutting plate. The slider assembly includes a slider that can slide between the cutting substrate and the top plate.

4. The injection mold for in-mold cutting of a metal strip according to claim 3, characterized in that, The demolding assembly includes a second ejector plate parallel to the first ejector plate and arranged with a gap, and a plurality of ejector pins installed on the second ejector plate.

5. The injection mold for in-mold cutting of a metal strip according to claim 4, characterized in that, The initial spacing distance between the top plate and the cutting substrate is set as L1, the initial spacing distance between the first ejector plate and the second ejector plate is set as L2, and the rising distance of the cutting knife during cutting is set as L3. Then, L1 > L2 > L3.

6. The injection mold for in-mold cutting of a metal strip according to claim 3, characterized in that The slider assembly includes a slide base slidably installed in the horizontal direction, a lifting base movably installed in the vertical direction, and the slider floatingly installed on the slide base. The slide base is provided with a first inclined surface, and the lifting base is provided with a second inclined surface that slidably cooperates with the first inclined surface.

7. The injection mold for in-mold cutting of a metal strip according to claim 6, characterized in that, Two first springs for rebounding the slide base are installed in the slide base, and second springs for rebounding the lifting base are respectively installed on both sides of the lifting base.

8. The injection mold for in-mold cutting of a metal strip according to claim 7, characterized in that, The slide base is provided with a through hole for the up and down movement of the lifting base, and the first inclined surface is located in the through hole.

9. The injection mold for in-mold cutting of a metal strip according to claim 7, characterized in that, The slide base includes a wedge groove extending in the vertical direction, a first limit block fixed above the wedge groove, and a second limit block fixed below the wedge groove. The slider protrudes with a wedge block that is buckled in the wedge groove. The wedge block can float up and down in the wedge groove and is limited by the first limit block and the second limit block.

10. The injection mold for in-mold cutting of a metal strip according to claim 9, characterized in that, Three of the sliders are arranged side by side on one side of the slide base, and the slider assembly has two symmetrically arranged ones.

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