An in-mold fixing structure of an ultra-thin steel sheet

Abstract

The utility model relates to the technical field of in-mold injection, in particular to an ultrathin steel sheet in-mold fixing structure, which is arranged in a lower mold plate of an injection mold and used for limiting and fixing a steel sheet in the lower mold plate, comprising a suction accessory arranged in the lower mold plate, the suction accessory relies on air pressure difference to realize suction and fixing of the steel sheet, a power source connected with the suction accessory is arranged on the side surface of the lower mold plate, the power source generates negative pressure to make the suction accessory obtain suction force, thereby realizing suction and fixing of the steel sheet. According to the utility model, before mold closing, the suction cup is used for suction and fixing a prefabricated part (such as a label or a metal part) through negative pressure, precise positioning of the prefabricated part is ensured, displacement of the prefabricated part is avoided, production cost is reduced due to reduction of defects, and in addition, the utility model can also be used for suction of various materials (a magnet can only be used for suction of steel / iron), thereby improving the suction diversity.

Description

Technical Field

[0001] This utility model relates to the field of in-mold injection molding technology, and in particular to an in-mold fixing structure for ultra-thin steel sheets. Background Technology

[0002] In in-mold injection molding, the precise fixing of ultra-thin steel sheets (thickness ≤ 0.1mm) is a crucial step in ensuring product quality. Currently, the industry mainly uses the following fixing methods: magnetic adsorption fixing, mechanical clamping fixing, and temporary adhesive fixing.

[0003] However, the applicant discovered the following drawbacks of the above-mentioned fixing method:

[0004] The disadvantages of using magnets for fixation are as follows:

[0005] 1. It can only attract magnetic materials and cannot fix stainless steel, copper alloy or non-metallic inserts (such as plastic film, ceramics).

[0006] 2. After long-term use, metal debris easily adheres to the surface of the magnet, causing damage to the steel sheet and increasing the product defect rate.

[0007] II. The disadvantages of mechanical clamping and fixing are as follows:

[0008] 1. Contact fixing can easily leave indentations on the steel sheet surface, affecting the appearance and function of high-gloss surfaces or precision components (such as mobile phone frames and optical lens brackets).

[0009] 2. Ultra-thin steel sheets (such as 0.05mm) are prone to deformation, making it difficult to meet the high precision requirement of ±0.02mm.

[0010] III. The disadvantages of temporary fixation with adhesive are as follows:

[0011] 1. Residual adhesive residue requires additional cleaning procedures, increasing production costs;

[0012] 2. The position cannot be repeatedly adjusted, and the yield rate is greatly affected by the operator's skill.

[0013] In summary, to address the aforementioned issues, we propose an in-mold fixing structure for ultra-thin steel sheets. Utility Model Content

[0014] In view of this, the purpose of this utility model is to propose an ultra-thin steel sheet in-mold fixing structure to solve the problem that when steel sheets are attracted by magnets, iron filings will accumulate in the area where the magnets are located over time. If the steel sheet is then placed in the new area, the surface of the steel sheet will be damaged, resulting in product scrap.

[0015] Based on the above objectives, this utility model provides an ultra-thin steel sheet in-mold fixing structure, which is set in the lower template of an injection mold for limiting and fixing the steel sheet in the lower template. It includes an adsorption component set in the lower template, which relies on air pressure difference to adsorb and fix the steel sheet.

[0016] The lower template has a power source connected to the adsorption component on its side. The power source generates negative pressure to make the adsorption component have an adsorption force, thereby achieving the adsorption and fixation of the steel sheet.

[0017] Preferably, the lower template has a slot for placing the adsorption components, and the number of adsorption components is not less than four.

[0018] Preferably, the adsorption element is a suction cup, the power source is a vacuum generator, and the vacuum generator is connected to the suction cup through a pipeline assembly.

[0019] Preferably, the suction cup is made of either silicone or rubber to allow for flexible adaptation.

[0020] Preferably, the piping assembly includes an elbow pipe installed on the vacuum end of the vacuum generator, the elbow pipe being connected to a main pipeline, and the main pipeline being connected to a suction cup via a branch pipeline.

[0021] Preferably, the suction cup is detachably installed on the branch pipe, the bottom end of the suction cup is connected to a bolt joint, and the top end of the branch pipe is provided with an internal thread that matches the bolt joint.

[0022] The beneficial effects of this utility model are as follows: This utility model provides an ultra-thin steel sheet in-mold fixing structure. When the suction cup is used for adsorption and fixation, there is no need to drill holes, nail, or damage the surface of the object. In addition, it is highly versatile and can adsorb metal or non-metal materials. When the suction cup material is silicone or rubber, it can fit slightly uneven or curved surfaces (such as automotive sheet metal or curved display screens). The structure is simple and the cost is low. This utility model ensures accurate positioning of prefabricated parts (such as labels or metal parts) by using negative pressure to adsorb and fix them before mold closing, avoiding displacement, reducing defects and thus reducing production costs. In addition, this application can also adsorb a variety of materials (magnets can only adsorb steel / iron), which improves the diversity of adsorption. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the suction cup, vacuum generator, and piping assembly of this utility model;

[0026] Figure 3 This utility model Figure 2 A schematic diagram of the explosive structure.

[0027] In the diagram: 1. Lower template; 2. Steel sheet; 3. Suction cup; 4. Vacuum generator; 5. Elbow pipe; 6. Main pipeline; 7. Branch pipeline; 8. Bolt joint. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figure 1 , Figure 2 , Figure 3 As shown, an ultra-thin steel sheet in-mold fixing structure is set in the lower template 1 of the injection mold to limit and fix the steel sheet 2 in the lower template 1. It includes an adsorption component set in the lower template 1, which relies on air pressure difference to adsorb and fix the steel sheet 2.

[0031] The lower template 1 has a power source connected to the adsorption component on its side. The power source generates negative pressure to make the adsorption component have an adsorption force, thereby achieving the adsorption and fixation of the steel sheet 2.

[0032] Adsorption and fixation are achieved through air pressure difference, eliminating the need for drilling, nailing, and damage to the object surface. In addition, it is highly versatile and can adsorb both metallic and non-metallic materials. Furthermore, this application can adsorb various materials, but the magnet can only adsorb steel / iron, which improves the diversity of adsorption. The structure is simple and the cost is low.

[0033] In a preferred embodiment of this utility model, the lower template 1 is provided with a slot for placing the adsorption components, and the number of adsorption components is not less than four. By setting multiple adsorption components, the adsorption and fixing effect of the steel sheet 2 is better, and the steel sheet 2 can be more stably and firmly located in the lower template 1.

[0034] The adsorption component is a suction cup 3, and the power source is a vacuum generator 4, which is connected to the suction cup 3 through a pipeline assembly.

[0035] In another preferred embodiment of this utility model, the suction cup 3 is made of either silicone or rubber, so that the suction cup 3 can be flexibly adapted and the material of the suction cup 3 (such as silicone or rubber) can fit slightly uneven or curved surfaces.

[0036] The piping assembly includes an elbow pipe 5 installed on the vacuum end of the vacuum generator 4, a main pipeline 6 connected to the elbow pipe 5, and a branch pipeline 7 connected to the suction cup 3.

[0037] The bottom end of the suction cup 3 is connected to a bolt joint 8, and the top end of the branch pipe 7 is provided with an internal thread that matches the bolt joint 8. The setting of the bolt joint 8 and the internal thread makes it easy and quick to disassemble and replace the suction cup 3, thereby improving the adsorption stability of the suction cup 3.

[0038] Before mold closing, when it is necessary to fix the steel sheet 2 inside the lower template 1, first place the steel sheet 2 in the fixed position inside the lower template 1, that is, place it above the suction cup 3. Then start the vacuum generator 4. The compressed air source enters through the air inlet of the vacuum generator. Since the vacuum end of the vacuum generator 4 is connected to the suction cup 3, a negative pressure is generated at this port through the Venturi effect, and the air inside the suction cup 3 is drawn to form a vacuum. Thus, under the action of the suction force of the suction cup 3, the steel sheet 2 is fixed in a specific position. It can also adsorb prefabricated parts of different materials. Non-contact adsorption can avoid mechanical clamping from damaging the product surface.

[0039] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0040] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ultra-thin steel sheet in-mold fixing structure, disposed within the lower template (1) of an injection mold, for limiting and fixing the steel sheet (2) within the lower template (1), characterized in that, It includes an adsorption element set in the lower template (1), which relies on the air pressure difference to adsorb and fix the steel sheet (2); The lower template (1) is provided with a power source connected to the adsorption element on its side. The power source generates negative pressure to enable the adsorption element to obtain adsorption force, thereby achieving adsorption and fixation of the steel sheet (2).

2. The ultra-thin steel sheet in-mold fixing structure according to claim 1, characterized in that, The lower template (1) has a slot for placing the adsorption components, and the number of adsorption components is not less than four.

3. The ultra-thin steel sheet in-mold fixing structure according to claim 1, characterized in that, The adsorption component is a suction cup (3), the power source is a vacuum generator (4), and the vacuum generator (4) is connected to the suction cup (3) through a pipeline assembly.

4. The ultra-thin steel sheet in-mold fixing structure according to claim 3, characterized in that, The suction cup (3) is made of either silicone or rubber, so that the suction cup (3) can be flexibly adapted.

5. The ultra-thin steel sheet in-mold fixing structure according to claim 3, characterized in that, The piping assembly includes an elbow pipe (5) installed on the vacuum end of the vacuum generator (4), the elbow pipe (5) is connected to a main pipeline (6), and the main pipeline (6) is connected to the suction cup (3) via a branch pipeline (7).

6. The ultra-thin steel sheet in-mold fixing structure according to claim 5, characterized in that, The bottom end of the suction cup (3) is connected to a bolt joint (8), and the top end of the branch pipe (7) is provided with an internal thread that is compatible with the bolt joint (8).

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