Injection mold and steel sheet positioning and correcting structure thereof

Abstract

The utility model discloses an injection mold and steel sheet positioning correction structure thereof, including fixed mould and movable mould still include the correction subassembly for correcting steel sheet positioning, and correction subassembly includes spring and correction insert, and correction insert can be assembled in fixed mould movably, and one end of correction insert is close to movable mould and is provided with the positioning step for the limit steel sheet, and the positioning step can be moved into the cavity of injection mold, and spring is arranged between fixed mould and correction insert, and when closing, under the elasticity of spring cooperation, make the steel sheet on the cavity wall of injection mold of positioning step elastic compression, with the correction cooperation clearance between cavity wall and steel sheet, can guarantee the cooperation clearance between steel sheet and injection mold even, and then effectively reduce the probability of flash and other defects.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold and its steel sheet positioning and correction structure. Background Technology

[0002] When steel sheets are typically inserted into an injection mold, uneven clearance between the steel sheet and the injection mold can cause defects such as flash in the molded parts, which can seriously affect the yield of the molded parts. Utility Model Content

[0003] To address the aforementioned problems, this invention provides an injection mold and its steel sheet positioning and correction structure, which ensures uniform clearance between the steel sheet and the injection mold, thereby effectively reducing the probability of defects such as flash.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] This utility model provides a steel sheet positioning and correction structure for an injection mold, including a fixed mold and a moving mold, and a correction component for correcting the positioning of the steel sheet; the correction component includes a spring and a correction insert, the correction insert being movably assembled to the fixed mold, and a positioning step for limiting the steel sheet is provided at one end of the correction insert near the moving mold, the positioning step being movably extended into the cavity of the injection mold; the spring is disposed between the fixed mold and the correction insert, and when the mold is closed, under the elastic force of the spring, the positioning step elastically presses the steel sheet on the cavity wall of the injection mold to correct the fitting gap between the cavity wall and the steel sheet.

[0006] Furthermore, the end of the correcting insert facing away from the positioning step is provided with an abutting boss, and the fixed mold is provided with a limiting wall for limiting the extension stroke of the positioning step into the cavity; before the mold is closed, the abutting boss and the limiting wall are spaced apart.

[0007] Furthermore, before mold closing, the distance between the abutting boss and the limiting wall is 0.5mm.

[0008] Furthermore, the cavity wall is provided with a positioning groove that matches the positioning step. The positioning step is detachably inserted into the positioning groove and restricts the placement position of the steel sheet in the cavity.

[0009] Furthermore, the two ends of the positioning step are respectively provided with a first inclined surface, and the two side walls of the positioning groove are respectively provided with a second inclined surface that cooperates with the first inclined surface.

[0010] This utility model provides an injection mold, which includes at least the steel sheet positioning and correction structure described above.

[0011] The technical solution provided by this utility model has the following beneficial effects:

[0012] When the mold is closed, the spring force causes the positioning step to elastically press against the steel sheet on the cavity wall of the injection mold, thereby correcting the fit gap between the cavity wall and the steel sheet to a uniform degree. This effectively reduces the probability of defects such as flash in the injection molded product, and can significantly improve the yield of the injection molded product and reduce production rework costs. Attached Figure Description

[0013] Figure 1 The figure shown is a cross-sectional view of the steel sheet positioning and correction structure of the injection mold in Embodiment 1;

[0014] Figure 2 The diagram shown is a schematic of the corrective insert in Embodiment 1. Detailed Implementation

[0015] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] Reference Figure 1 and Figure 2 Example 1 provides a steel plate positioning and correction structure for injection molds (hereinafter referred to as steel plate positioning and correction structure) to assist in the correction of steel plates during the injection molding process.

[0018] The steel sheet positioning and correction structure of this embodiment includes a fixed mold 1 and a moving mold 2 arranged at the top and bottom, and a correction component 3 for correcting the positioning of the steel sheet 5.

[0019] More specifically, the straightening component 3 includes a spring 31 and a straightening insert 32. The straightening insert 32 is movably mounted on the fixed mold 1, and a positioning step 321 for limiting the steel plate 5 is provided at the lower end of the straightening insert 32 near the moving mold 2. The positioning step 321 can extend movably into the cavity 4 of the injection mold, and the spring 31 is located between the fixed mold 1 and the straightening insert 32. Of course, the lower end of the straightening insert 32 is also provided with a relief groove 322 for accommodating the injection molded part's glue position 6.

[0020] In this embodiment, the upper end of the straightening insert 32, facing away from the positioning step 321, is provided with a laterally protruding abutment boss 323. The fixed mold 1 is provided with a limiting wall 11 to restrict the extension and retraction of the positioning step 321 into the cavity 4. Before mold closing, the abutment boss 323 and the limiting wall 11 are spaced apart, for example, the distance between the abutment boss 323 and the limiting wall 11 is 0.5 mm. Of course, in other embodiments, the distance between the abutment boss 323 and the limiting wall 11 is determined based on the structure of the steel sheet and the injection mold, and is not limited to this.

[0021] Furthermore, the cavity wall 41 inside the cavity 4 is provided with a positioning groove 42 that matches the positioning step 321. The positioning step 321 can be detachably inserted into the positioning groove 42 and the edge of the steel sheet 5 is locked by the positioning step 321 to limit the placement position of the steel sheet 5 in the lateral direction inside the cavity 4.

[0022] During injection molding production, after the steel sheet 5 is placed in the cavity 4, the fixed mold 1 and the moving mold 2 begin to close. Before the spring 31 compresses and deforms, the positioning step 321 of the straightening insert 32 will pre-lock the edge of the steel sheet 5 to ensure that the steel sheet 5 will not shift in the lateral direction within the cavity 4. Then, the spring 31 is compressed and applies a downward elastic force to the straightening insert 32, causing the straightening insert 32 to move downward or pop out by 0.5mm. At this time, the abutting boss 323 of the straightening insert 32 abuts against the limiting wall 11 in the fixed mold 1. This ensures that the straightening insert 32 will not continue to extend into the cavity 4, and the straightening insert 32, under the elastic force of the spring 31, elastically presses the steel sheet 5 on the cavity wall 41 of the injection mold to correct the fit gap between the cavity wall 41 and the steel sheet 5 to a uniform degree.

[0023] In summary, during mold closing, the positioning step 321 elastically presses the steel sheet 5 on the cavity wall 41 of the injection mold under the elastic force of the spring 31, so as to correct the fit gap between the cavity wall 41 and the steel sheet 5 to be uniform, thereby effectively reducing the probability of defects such as flash in injection molded products, and significantly improving the yield of injection molded products and reducing production rework costs.

[0024] In a further preferred embodiment, the two ends of the positioning step 321 are respectively provided with a first inclined surface, and the two side walls of the positioning groove 42 are respectively provided with a second inclined surface that matches the first inclined surface, so that the positioning step 321 can be smoothly inserted into the positioning groove 42.

[0025] Example 2

[0026] Example 2 provides an injection mold that includes at least the steel sheet positioning and correction structure of Example 1.

[0027] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A steel sheet positioning and correction structure for an injection mold, comprising a fixed mold and a moving mold, characterized in that: It also includes a correction component for correcting the positioning of the steel plates; The corrective assembly includes a spring and a corrective insert. The corrective insert is movably assembled to the fixed mold, and the end of the corrective insert near the moving mold is provided with a positioning step for limiting the steel plate. The positioning step can extend movably into the cavity of the injection mold. The spring is disposed between the fixed mold and the straightening insert. When the mold is closed, the spring's elastic force causes the positioning step to elastically press against the steel sheet on the cavity wall of the injection mold, thereby correcting the fit gap between the cavity wall and the steel sheet.

2. The steel sheet positioning and correction structure for injection molds according to claim 1, characterized in that: The end of the correcting insert facing away from the positioning step is provided with an abutting boss, and the fixed mold is provided with a limiting wall for limiting the extension stroke of the positioning step into the cavity; before the mold is closed, the abutting boss and the limiting wall are spaced apart.

3. The steel sheet positioning and correction structure for injection molds according to claim 2, characterized in that: Before mold closing, the distance between the abutting boss and the limiting wall is 0.5mm.

4. The steel sheet positioning and correction structure for injection molds according to any one of claims 1-3, characterized in that: The cavity wall is provided with a positioning groove that matches the positioning step. The positioning step is detachably inserted into the positioning groove and restricts the placement position of the steel sheet in the cavity.

5. The steel sheet positioning and correction structure for injection molds according to claim 4, characterized in that: The positioning step has a first inclined surface at each end, and the two side walls of the positioning groove have a second inclined surface that matches the first inclined surface.

6. An injection mold, characterized in that: It includes at least the steel plate positioning and correction structure as described in any one of claims 1-5.

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