Pull ring cover mold forming method

Abstract

The invention relates to the technical field of mold processing, and provides a pull ring cover mold forming method which comprises the following steps: step 1, carrying out wire cutting operation on raw materials by utilizing a wire cutting station on a mold; secondly, punching is conducted on the cut material through a punching station on the die; thirdly, the punched material is subjected to flanging treatment through a flanging station on the die; and fourthly, the flanged material is subjected to stretching forming through a stretching forming station on the die. Punch forming and flanging are completed in one set of die at a time, the transfer time of an aluminum cover between a punching die and a flanging machine in a traditional process and the cleaning time before flanging are omitted, the flanging process and the cleaning process related to the flanging process are reduced, the equipment purchase cost, the labor cost and the energy cost are saved, and meanwhile, the production efficiency is improved. And raw material waste is reduced by reducing the rejection rate.

Description

Technical Field

[0001] The invention relates to the technical field of mold processing, in particular to a pull ring cover mold forming method. Background Art

[0002] Ring-pull aluminum caps are widely used in many packaging fields, and the optimization of their production process is crucial to improving production efficiency and reducing costs.

[0003] In the prior art, the production of pull-ring aluminum covers usually adopts a step-by-step process. First, a stamping die is used to stamp the raw materials to form the basic shape of the aluminum cover. After the stamping is completed, the aluminum cover needs to be transferred to a special flanging machine for flanging of the pull ring. In this process, since the stamping process may cause the surface of the aluminum cover to be contaminated with oil, debris and other impurities, in order to ensure the quality of the flanging, the aluminum cover must be cleaned before flanging. This step-by-step process has many disadvantages.

[0004] The traditional process is to first punch the aluminum cover with a stamping die, and then transfer the aluminum cover to the flanging machine for flanging the pull ring. Before flanging, the aluminum cover needs to be cleaned due to oil, debris and other pollution that may be generated during the stamping process. This not only adds a production process, consumes extra time and labor costs, but also may cause certain damage to the aluminum cover during the cleaning process. At the same time, during the flanging process, since the aluminum cover needs to be repositioned and clamped, positioning errors are prone to occur, resulting in inaccurate flanging dimensions, inconsistent flanging shapes and other problems, thereby generating waste. These waste products not only waste raw materials, but also require additional manpower and time to process. In addition, the traditional step-by-step process leads to cumbersome production processes, low production efficiency, large equipment space occupation, and high overall production costs, which makes it difficult to meet the needs of modern industrial production for high efficiency and low cost. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a pull ring cover mold forming method, which solves the problems of low production efficiency, large equipment space occupation, high overall production cost, and difficulty in meeting the needs of modern industrial production for high efficiency and low cost.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for forming a pull ring cover mold, comprising the following steps:

[0007] Step 1: Use the cutting station on the mold to cut the raw material;

[0008] Step 2: Punch holes on the cut material using the punching station on the mold;

[0009] Step 3: flanging the punched material using the flanging station on the die;

[0010] Step 4: The flanged material is stretched and formed using the stretching and forming station on the mold.

[0011] Preferably, the cutting station is based on the design shape and size requirements of the pull ring cover, and the cutting accuracy is controlled within the range of ±[X] mm.

[0012] Preferably, the mold is designed with four workstations, which is equivalent to a 12-cavity mold. The flanging stamping one-time forming mold is designed with 2 cavities and has 8 workstations. The stamping and flanging of the pull ring cover are completed in the mold through four steps of cutting, punching, flanging and stretching. The connection between each workstation is tight, and the continuous and efficient processing of raw materials in the mold is achieved through the mechanical structure of the mold and the automated control of the stamping equipment.

[0013] Preferably, the punching station can punch holes in the material after cutting according to the functional requirements of the pull ring cover, and the position accuracy of the punching is controlled within the range of ±[Y] mm.

[0014] Preferably, the flanging station extrude and deform the edge of the punched material under the action of the punching power, so that the pull ring part is initially formed, and the error of the flanging angle is controlled within the range of ±[Z] degrees.

[0015] Preferably, the stretching forming station controls the stretching parameters so that the pull ring cover reaches the final shape and size requirements, the dimensional accuracy is controlled within the range of ±[W] mm, and the stamping and flanging are completed at one time in a set of molds during the whole process.

[0016] A mold for a pull ring cover mold forming method, comprising:

[0017] The cutting station component is used to cut the raw materials;

[0018] Punching station components, used for punching holes in the material after cutting;

[0019] The flanging station component is used to flanging the material after punching;

[0020] The stretch forming station component is used to stretch the material after flanging.

[0021] Preferably, the punching punch and the punching die provided at the punching station are designed in shape and size according to the shape and size of the hole required for the pull ring cover.

[0022] Preferably, the flanging station comprises a flanging punch and a flanging die, and the shapes of the flanging punch and the flanging die match the flanging shape of the pull ring part of the pull ring cover.

[0023] Preferably, the stretching forming station is provided with a stretching punch and a stretching die, and the stretching punch and the stretching die work together to further stretch the flanged material.

[0024] The present invention provides a method for forming a pull ring cover mold. It has the following beneficial effects:

[0025] 1. The present invention completes stamping and flanging in one set of molds at one time, thereby eliminating the transfer time of the aluminum cover between the stamping mold and the flanging machine in the traditional process, as well as the cleaning time before flanging. Since the flanging process and the related cleaning process are reduced, the equipment purchase cost, labor cost and energy cost are saved. At the same time, the reduction in scrap rate reduces the waste of raw materials.

[0026] 2. The present invention has certain versatility. By appropriately adjusting the shape and size parameters of the workstation components such as cutting, punching, flanging, and stretching, it can meet the production needs of pull-ring covers of different specifications and models. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example:

[0030] As one aspect of the present invention, an embodiment of the present invention provides a mold for a pull ring cover mold forming method, comprising:

[0031] The tangent station component is used to perform tangent operation on the raw material. The tangent station component includes a tangent tool or a punching device fixedly installed on the mold. The tangent tool or the punching device is made of high-strength, high-hardness and wear-resistant materials, such as cemented carbide, etc. The cutting edge or the punching part thereof is precisely processed, and the sharpness of the cutting edge can ensure a clean and neat tangent operation on the raw material, and has good durability, and keeps the tangent accuracy stable during a long production process;

[0032] The punching station components are used to punch holes in the material after cutting. The punching station components include a punch installed on the mold and a punching die matched therewith. The punch and the punching die are made of high-quality mold steel and undergo heat treatment and other processes to improve their hardness and strength. The head shape of the punch is designed according to the hole shape required for the pull ring cover, which can be round, square or other shapes, and the gap between the punch and the punching die is precisely controlled within the range of ±[A] mm (A is a reasonable gap value determined according to actual production needs) to ensure the quality and accuracy of the punching;

[0033] The flanging station components are used to flanging the material after punching. The flanging station components are composed of a flanging punch and a flanging die. The flanging punch and the flanging die are made of mold materials with good toughness and wear resistance. The shape of the flanging punch is completely consistent with the flanging shape of the pull ring part of the pull ring cover. The cavity of the flanging die is adapted to the flanging punch. The matching accuracy between the two is extremely high, which can make the material deform evenly during the flanging process. The surface roughness of the flanging punch and the flanging die is controlled within the range of [B] microns (B is a reasonable roughness value determined according to actual production needs) to reduce the friction between the material and the mold and improve the flanging quality;

[0034] The stretching forming station components are used to stretch the material after flanging. The stretching forming station components are provided with a stretching punch and a stretching die. The stretching punch and the stretching die are made of high-strength die steel. The shape and size of the stretching punch are designed according to the final shape of the pull ring cover. The cavity of the stretching die can accommodate the material deformation during the stretching process. The gap between the stretching punch and the stretching die can be adjusted according to the material thickness and stretching requirements of the pull ring cover. The adjustment accuracy is controlled within the range of ±[C] mm (C is a reasonable gap adjustment accuracy value determined according to actual production needs), and each station component works in coordination to ensure that the stamping and flanging are formed in the mold at one time through the mold's guide mechanism, positioning device, etc. The overall structure of the mold is compact and stable, and can withstand high-frequency stamping operations, thereby ensuring the production efficiency and quality of the pull ring cover;

[0035] Among them, the overall design of the mold is four-station, which is equivalent to a 12-cavity mold. The flanging stamping one-time forming mold is designed with 2 cavities and has 8 stations. The internal structure can realize the four-step operation of cutting, punching, flanging and stretching. The layout between the cavities of the mold is reasonable, and multiple cavities can be processed simultaneously to improve production efficiency. At the same time, the mold is also equipped with a cooling system to cool the mold during the stamping process to prevent the mold from overheating and affecting the processing accuracy and mold life. The cooling medium of the cooling system can be water or oil, and the cooling pipes are distributed at the key parts of the mold to ensure uniform mold temperature.

[0036] Based on the above-mentioned pull ring cover mold forming mold, as another aspect of the present invention, please refer to the attached Figure 1, a pull ring cover mold forming method, comprising the following steps:

[0037] Step 1: Using a mold to perform a tangent operation on the raw material, the mold has a tangent station, and the tangent station is provided with a special tangent tool or punching device. The tangent tool or punching device accurately performs a tangent operation on the raw material according to the design shape and size requirements of the pull ring cover, so that the raw material is cut into a shape that preliminarily meets the outline of the pull ring cover, providing a basic shape for subsequent processes, and the tangent accuracy is controlled within the range of ±[X] mm (X is a reasonable accuracy value determined according to actual production requirements);

[0038] Step 2: punching holes on the material after cutting, the mold has a punching station, the punching station is equipped with a punch and a corresponding punching die, the shape and size of the punch are designed according to the shape and size of the hole required by the pull ring cover, and holes that meet the functional requirements of the pull ring cover can be punched on the material after cutting, such as holes for installing pull rings or meeting functions such as ventilation, and the position accuracy of the punching is controlled within the range of ±[Y] mm (Y is a reasonable accuracy value determined according to actual production requirements);

[0039] Step 3, flanging the punched material, the mold having a flanging station, the flanging station comprising a flanging punch and a flanging die, the shapes of the flanging punch and the flanging die accurately matching the flanging shape of the pull ring portion of the pull ring cover, the flanging punch, under the action of the punching power, extrude and deform the edge of the punched material along the shape of the flanging die, so that the pull ring portion is initially formed, the flanging angle, flanging height and other dimensions thereof meet the design requirements of the pull ring cover, and the error of the flanging angle is controlled within the range of ±[Z] degrees (Z is a reasonable angle error value determined according to actual production requirements);

[0040] Step 4: stretch the material after flanging, the mold has a stretching forming station, and the stretching forming station is provided with a stretching punch and a stretching die. The stretching punch and the stretching die work together to further stretch the flanging material, and control the depth, strength and other parameters of the stretching to make the pull ring cover reach the final shape and size requirements, including the overall height, diameter, curvature and other dimensional accuracy of the pull ring cover controlled within the range of ± [W] mm (W is a reasonable dimensional error value determined according to actual production needs), and in the whole process, stamping and flanging are completed in a set of molds at one time, avoiding the cumbersome steps of stamping first, flanging and cleaning in the traditional process, thereby improving production efficiency and reducing production costs.

[0041] Among them, the mold is designed with four stations, which is equivalent to a 12-cavity mold. The flanging stamping one-time forming mold is designed with 2 cavities and has 8 stations. The stamping and flanging of the pull ring cover are completed in the mold through four steps of cutting, punching, flanging and stretching. The connection between each station is close, and the continuous and efficient processing of raw materials in the mold is realized through the mechanical structure of the mold and the automatic control of the stamping equipment.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for forming a pull ring cover mold, characterized in that: The following steps are involved: Step 1: Use the cutting station on the mold to cut the raw material; Step 2: Punch holes on the cut material using the punching station on the mold; Step 3: flanging the punched material using the flanging station on the die; Step 4: The flanged material is stretched and formed using the stretching and forming station on the mold.

2. A method for forming a pull ring cover mold according to claim 1, characterized in that: The cutting station is based on the design shape and size requirements of the pull ring cover, and the cutting accuracy is controlled within the range of ±[X] mm.

3. A method for forming a pull ring cover mold according to claim 1, characterized in that: The mold is designed with four workstations, which is equivalent to a 12-cavity mold. The flanging stamping one-time forming mold is designed with 2 cavities and has 8 workstations. The stamping and flanging of the pull ring cover are completed in the mold through four steps of cutting, punching, flanging and stretching. The connection between each workstation is close, and the continuous and efficient processing of raw materials in the mold is achieved through the mechanical structure of the mold and the automatic control of the stamping equipment.

4. A method for forming a pull ring cover mold according to claim 1, characterized in that: The punching station can punch holes in the material after cutting according to the functional requirements of the pull ring cover, and the position accuracy of the punching is controlled within the range of ±[Y] mm.

5. A method for forming a pull ring cover mold according to claim 1, characterized in that: The flanging station, under the action of the punching power, extrude and deform the edge of the punched material to preliminarily form the pull ring part, and the error of the flanging angle is controlled within the range of ±[Z] degrees.

6. A method for forming a pull ring cover mold according to claim 1, characterized in that: The stretch forming station controls the stretching parameters so that the pull ring cover reaches the final shape and size requirements, and the dimensional accuracy is controlled within the range of ±[W] mm. In the whole process, the stamping and flanging are completed at one time in a set of molds.

7. A mold for a ring pull cover mold forming method, using a ring pull cover mold forming method as claimed in any one of claims 1 to 6, characterized in that: include: The cutting station component is used to cut the raw materials; Punching station components, used for punching holes in the material after cutting; The flanging station component is used to flanging the material after punching; The stretch forming station component is used to stretch the material after flanging.

8. The mold of the pull ring cover mold forming method according to claim 7, characterized in that: The punching punch and the punching die equipped in the punching station are designed in shape and size according to the shape and size of the hole required by the pull ring cover.

9. The mold of the pull ring cover mold forming method according to claim 7, characterized in that: The flanging station comprises a flanging convex die and a flanging concave die, and the shapes of the flanging convex die and the flanging concave die match the flanging shape of the pull ring part of the pull ring cover.

10. The mold of the pull ring cover mold forming method according to claim 7, characterized in that: The stretching forming station is provided with a stretching punch and a stretching die, and the stretching punch and the stretching die work together to further stretch the flanged material.

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