Protective sleeve injection mold for preparing mobile phone protective sleeve with magnet groove

Abstract

The utility model discloses a protective sleeve injection mold for preparing a mobile phone protective sleeve with a magnet groove, which relates to the technical field of mobile phone protective sleeve preparation, and comprises an upper mold base, a lower mold base, an inner back insert and an ejector rod, the upper mold base is provided with an upper mold core, and the lower mold base is provided with a lower mold core. A first ejector plate and a second ejector plate are further arranged on the lower mold base, the inner back face insert and the ejector rod are installed on the first ejector plate and the second ejector plate respectively, by improving the structure of the injection mold, when glue injection is conducted, the ejector rod can move downwards correspondingly, so that the thickness difference between the magnet groove and the main glue position is reduced, and thickness marks are avoided during conventional injection molding; before cooling forming, the magnet groove with the required depth can be obtained in a secondary extrusion mode of the ejector rod capable of jacking upwards; compared with a traditional mode that a product magnet groove mold is filled with glue, filled and leveled up, and then CNC machining is conducted on the product after injection molding is completed, the production procedures of the product are effectively reduced, the productivity is improved, the reject ratio is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of preparing a mobile phone protective cover, in particular to a protective cover injection mould for preparing a mobile phone protective cover with a magnet groove. Background Art

[0002] Currently, mobile phones with wireless charging function are equipped with mobile phone protective cases that usually have magnet slots for installing magnets, so that when wireless charging is performed, the mobile phone can be magnetically placed on the wireless charging stand more stably through the magnets.

[0003] There are many structures of mobile phone protective cases with magnet slots. Figure 1 As shown, the depth of the magnet groove 200 on the mobile phone protective cover 100 is mainly 1.1 mm, and the total thickness of the back plate of the mobile phone protective cover 100 is about 1.70-2.30 mm.

[0004] Due to the large thickness difference between the magnet slot and the main glue position, there will be thickness marks during conventional injection molding, and it cannot be solved by adjusting the machine. At present, the main method to solve the thickness mark is to add glue to the magnet slot mold of the product to fill it, and then perform CNC processing on the product after the injection molding is completed. The disadvantages are: high product production cost, high defect rate, and serious impact on product delivery time. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a protective cover injection mold for preparing a mobile phone protective cover with a magnet groove, comprising an upper mold base and a lower mold base, wherein the upper mold base is provided with an upper mold core, and the lower mold base is provided with a lower mold core, and further comprising

[0007] An inner back insert is used to form the inner back of the mobile phone protective cover, and a sliding track corresponding to the inner back insert is vertically formed on the lower mold core;

[0008] A push rod is used to form a magnet groove on the inner back of the mobile phone protective cover, and a sliding track corresponding to the push rod is vertically formed on the inner back insert;

[0009] The lower die base is also provided with a first ejector plate and a second ejector plate, and the inner back side insert and the ejector rod are respectively installed on the first ejector plate and the second ejector plate.

[0010] As a further solution of the utility model: the cross section of the ejector pin includes a ring shape, the bottom of the ejector pin is connected to a connecting rod, a boss insert for forming a fixed boss in the magnet slot is installed on the connecting rod, and the connecting rod is connected to the second ejector plate.

[0011] As a further solution of the utility model: the height difference between the top surface of the convex column insert and the top surface of the ejector rod is the actual depth of the magnet groove after molding.

[0012] As a further solution of the utility model: the top of the connecting rod is formed with a first positioning groove for positioning the lower end of the push rod; the lower end of the convex column insert is formed with a transversely extending boss, and the bottom wall of the first positioning groove is formed with a second positioning groove for positioning the lower end of the convex column insert; when the push rod is positioned on the first positioning groove, it is located above the boss to form a resistance limit on the boss.

[0013] As a further solution of the utility model: a fixing through hole connected to the first positioning groove is horizontally penetrated on the connecting rod, a matching hole position or a matching arc position matching with the fixing through hole is formed on the top rod, and a fixing pin corresponding to the fixing through hole and the matching hole position or the matching arc position is configured.

[0014] As a further solution of the utility model: the first ejector plate is located above the second ejector plate; the first ejector plate is driven by the second ejector plate to move upward, and when the first ejector plate moves downward to the right position, there is a redundant spacing between the first ejector plate and the second ejector plate.

[0015] Compared with the prior art, the beneficial effects of the technical solution are as follows: by improving the structure of the injection mold, when injecting glue, the push rod can be moved downward to reduce the thickness difference between the magnet groove and the main glue position, so that there will be no thickness mark during conventional injection molding. Before cooling and molding, the magnet groove of the required depth can be obtained by secondary extrusion of the push rod that can be lifted upward; compared with the traditional product magnet groove mold, glue is added to fill it, and the product is CNC processed after the injection molding is completed: it effectively reduces the product production process, improves production capacity, reduces the defective rate, and reduces costs.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the prepared mobile phone protective cover;

[0019] Figure 2 It is a structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the matching structure of the top rod and the inner back insert in the utility model;

[0021] Figure 4 It is a schematic diagram of the matching structure of the top rod and the connecting rod in the utility model;

[0022] Figure 5 It is a cross-sectional view of the matching structure of the push rod and the connecting rod in the utility model.

[0023] The corresponding reference numerals in the accompanying drawings are described as follows:

[0024] Upper die base-1, lower die base-2, inner back insert-5, ejector rod-6, first ejector plate-7, second ejector plate-8, connecting rod-9, boss insert-10, first positioning groove-11, boss-12, second positioning groove-13, fixing through hole-14, matching arc position-15, fixing pin-16,

[0025] Mobile phone case - 100, magnet slot - 200, fixing boss - 300. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 , a protective cover injection mold for preparing a mobile phone protective cover with a magnet groove, includes an upper mold base 1 and a lower mold base 2, the upper mold base is provided with an upper mold core, the lower mold base is provided with a lower mold core, and also includes an inner back insert 5 and a push rod 6.

[0028] The inner back face insert 5 is used to form the inner back face of the mobile phone protective case 100, and a sliding track corresponding to the inner back face insert 5 is vertically formed on the lower mold core; the ejector rod 6 is used to form the magnet groove 200 on the inner back face of the mobile phone protective case 100, and a sliding track corresponding to the ejector rod 6 is vertically formed on the inner back face insert 5; wherein, a first ejector plate 7 and a second ejector plate 8 are also provided on the lower mold base 2, and the inner back face insert 5 and the ejector rod 6 are respectively installed on the first ejector plate 7 and the second ejector plate 8.

[0029] When injection molding a mobile phone protective cover 100 having a magnet groove 200, the push rod 6 is first moved downward to a position so that the current depth of the magnet groove formed during the injection of the glue is A1. At this time, the current depth A1 is smaller than the actual required depth A of the magnet groove. In the later stage of injection molding, the push rod 6 is driven upward through the mold structure to squeeze and deepen the groove to the required depth A.

[0030] Taking the formation of a 1.1mm deep magnet groove as an example, the push rod 6 is first moved downward to the injection depth of the magnet groove to be 0.90mm. Before cooling and forming, the push rod 6, which can be driven by the second ejector plate 8 to lift up, extrude and deepen the groove upward. This 0.20mm depth difference is obtained after secondary extrusion, thereby obtaining a magnet groove with a final depth of 1.1mm.

[0031] By improving the structure of the injection mold, when injecting glue, the push rod 6 can be moved downward to reduce the thickness difference between the magnet groove and the main glue position, so that there will be no thickness mark during conventional injection molding. Before cooling and molding, the magnet groove 200 of the required depth can be obtained by secondary extrusion of the push rod 6 that can be lifted upward.

[0032] Compared with the traditional product, the magnet slot mold is filled with glue, and the product is CNC processed after the injection molding is completed: it effectively reduces the product production process, improves production capacity, reduces defective rate, and reduces costs.

[0033] The cross section of the ejector rod 6 includes a ring shape. The bottom of the ejector rod 6 is connected to a connecting rod 9 . A boss insert 10 for forming a fixed boss 300 in the magnet slot 200 is installed on the connecting rod 9 . The connecting rod 9 is connected to the second ejector plate 8 .

[0034] The height difference between the top surface of the boss insert 10 and the top surface of the ejector rod 6 is the actual depth of the magnet slot after molding.

[0035] Preferably, a first positioning groove 11 for positioning the lower end of the push rod 6 is formed at the top of the connecting rod 9; a laterally extending boss 12 is formed at the lower end of the boss insert 10, and a second positioning groove 13 for positioning the lower end of the boss insert 10 is formed on the bottom wall of the first positioning groove 11; when the push rod 6 is positioned on the first positioning groove 11, it is located above the boss 12 to form a resistance limit on the boss 12.

[0036] A fixing through hole 14 communicating with the first positioning groove 11 is horizontally penetrated on the connecting rod 9, a matching hole position or matching arc position 15 matching with the fixing through hole 14 is formed on the top rod 6, and a fixing pin 16 corresponding to the fixing through hole 14 and the matching hole position or matching arc position 15 is arranged.

[0037] During installation, firstly, the portion with the boss 12 on the lower end of the convex column insert 10 is positioned on the second positioning groove 13, then the push rod 6 is sleeved on the convex column insert 10 and the lower end of the push rod 6 is positioned on the first positioning groove 11, the lower end of the push rod 6 forms a resistance restriction on the boss 12, then the matching hole or matching arc position 15 is aligned with the fixing through hole 14, and finally the fixing pin 16 is inserted to fix it. The whole installation process is convenient and simple.

[0038] Furthermore, the first ejector plate 7 is located above the second ejector plate 8; the first ejector plate 7 is driven upward by the second ejector plate 8, and when the first ejector plate 7 is in place, there is a redundant spacing between the first ejector plate 7 and the second ejector plate 8. The redundant spacing can be understood as the spacing required when the ejector rod 6 is moved upward for extrusion. After the mold is opened, the power member (not shown) can continue to drive the second ejector plate 8 to drive the first ejector plate 7, so that the inner back insert 5 and the ejector rod 6 can jointly eject the formed mobile phone protective cover.

[0039] As an injection mold, it also includes a slide mechanism, a slide insert, a glue injection system, a mold separation and closing mechanism and other components that enable the injection process to proceed smoothly, which will not be described one by one here.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A protective cover injection mold for preparing a mobile phone protective cover with a magnet groove, comprising an upper mold base and a lower mold base, wherein the upper mold base is provided with an upper mold core, and the lower mold base is provided with a lower mold core, It is characterized in that Also includes An inner back insert is used to form the inner back of the mobile phone protective cover, and a sliding track corresponding to the inner back insert is vertically formed on the lower mold core; A push rod is used to form a magnet groove on the inner back of the mobile phone protective cover, and a sliding track corresponding to the push rod is vertically formed on the inner back insert; The lower die base is also provided with a first ejector plate and a second ejector plate, and the inner back side insert and the ejector rod are respectively installed on the first ejector plate and the second ejector plate.

2. The protective cover injection mold for preparing a mobile phone protective cover with a magnet groove according to claim 1, It is characterized in that The cross section of the ejector pin includes a ring shape, the bottom of the ejector pin is connected to a connecting rod, a boss insert for forming a fixed boss in the magnet slot is installed on the connecting rod, and the connecting rod is connected to the second ejector pin plate.

3. The protective cover injection mold for preparing a mobile phone protective cover with a magnet groove according to claim 2, It is characterized in that The height difference between the top surface of the convex column insert and the top surface of the ejector rod is the actual depth of the magnet slot after it is formed.

4. The protective cover injection mold for preparing a mobile phone protective cover with a magnet groove according to claim 2 or 3, It is characterized in that The top of the connecting rod is formed with a first positioning groove for positioning the lower end of the top rod; The lower end of the convex column insert is formed with a transversely extending boss, and the bottom wall of the first positioning groove is formed with a second positioning groove for positioning the lower end of the convex column insert; When the push rod is positioned on the first positioning groove, it is correspondingly located above the boss to form a blocking restriction on the boss.

5. The protective cover injection mold for preparing a mobile phone protective cover with a magnet groove according to claim 4, It is characterized in that The connecting rod is laterally penetrated by a fixing through hole connected to the first positioning groove, the push rod is formed with a matching hole position or a matching arc position matching with the fixing through hole, and is provided with a fixing pin corresponding to the fixing through hole and the matching hole position or the matching arc position.

6. The protective cover injection mold for preparing a mobile phone protective cover with a magnet groove according to claim 1, 2, 3 or 5, It is characterized in that The first ejector plate is located above the second ejector plate; The first ejector plate is driven by the second ejector plate to move upward, and when the first ejector plate is in place, there is a redundant spacing between the first ejector plate and the second ejector plate.

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