WO2015081611A1

WO2015081611A1 - Method for manufacturing rear cover of refrigerator compressor

Info

Publication number: WO2015081611A1
Application number: PCT/CN2014/001084
Authority: WO
Inventors: 刘瑾; 游飞越
Original assignee: 刘瑾
Priority date: 2013-12-02
Filing date: 2014-12-02
Publication date: 2015-06-11
Also published as: CN104669353A; CN104669353B

Abstract

Disclosed is a method for manufacturing a rear cover of a refrigerator compressor, comprising pre-heating a sheet (2) or a plate prepared for a rear cover of a refrigerator compressor, then cold pressing and shaping using a rear cover mould, punching and trimming at the same time as maintaining pressure, and shaping at a time after cold pressing and punching and trimming. The manufacturing method adopts improved cold pressing and shaping, and punching and trimming at the same time as cold pressing and maintaining pressure, which not only saves on stages of manufacture, reducing labour costs, but also improves production efficiency.

Description

Method for manufacturing refrigerator compressor rear cover

Technical field

The invention relates to the field of household appliance production, and in particular to a method for manufacturing a compressor rear cover of a refrigerator.

Background technique

For the refrigerator compressor back cover, there are currently three manufacturing methods: first, metal stamping process manufacturing; second, injection molding process manufacturing; third, plastic manufacturing process. The disadvantage of the first manufacturing method is that the peripheral parts of the metal parts need to be folded in a bilateral structure, the process is complicated, and it is easy to scratch the hands and the wires, and the process basically tends to be eliminated. The disadvantage of the second process method is that the mold structure of the injection molded parts is complicated, the tonnage of the injection molding machine is relatively large, the capital invested by the equipment is large, and the wall thickness of the injection molded parts is thick, and the material waste is serious, from the material cost and capital. The investment aspect is not very cost-effective, and this process has been used less. The third process is manufactured by a blister process, which is currently more commonly used, but its disadvantage is that it must be formed in two steps, first blistering and then trimming and punching. The blistering adopts a single-station blister machine, which has a long molding cycle and must be operated by a special worker, and then cut and punched by other workers; at least two workers are responsible for blistering, trimming and punching. Low efficiency, high labor costs, and at least two pieces of equipment for blistering and trimming, which consumes a lot of energy; in addition, it is prone to work-related accidents due to equipment.

Summary of the invention

It is an object of the present invention to provide a method of manufacturing a refrigerator compressor back cover which is highly efficient in production.

The invention can be implemented by adopting the following technical solutions:

The invention discloses a method for manufacturing a compressor back cover of a refrigerator. The manufacturing method comprises the following steps: 1) pre-winding a sheet on a coil winding, and synchronously rotating the coil winding, the brake roller and the edge winding. To pull the sheet forward, the heating net is disposed behind the horizontal direction of the brake roller to preheat the passing sheet, and a cold press punching integrated machine is disposed at a level adjacent to the heating net, and the cold press punching machine includes The upper mold and the lower mold of the mating operation according to the shape of the rear cover of the refrigerator, wherein the upper mold is provided with a punching knife and a cutter, and the lower mold is correspondingly provided with punching and cutting edges corresponding to the punching knife; When the sheet passes through the cold press punching machine, the coil winding, the brake roller and the edge winding are suspended, and the upper mold and the lower mold are pressed to clamp the mold to achieve cold pressing and punching trimming once. Molding; 3) during the holding process of the upper mold and the lower mold holding state for several seconds, the punching knife and the cutter in the upper mold punch out and punch the formed sheet, After completion, the punching knife and the cutter are retracted while the pressure holding is completed, and the upper mold is retracted to prepare a Type of product.

Preferably, the temperature of the sheet or sheet in step 1) is 70-150 ° C and the preheating time is 2-20 seconds.

Preferably, after the punching and trimming, the rear cover of the formed refrigerator compressor is taken out by a robot to perform inspection or automatic packaging.

Preferably, the sheet or sheet is selected from the group consisting of sheets, sheets of PP, PVC or HIPS.

Preferably, the sheet or sheet of PP, PVC or HIPS is a foamed sheet or a foamed sheet.

Therefore, the beneficial effects of the present invention are: the manufacturing method of the refrigerator compressor back cover of the present invention, changing the traditional refrigerator compressor back cover can only adopt the thinking limitation of metal stamping, injection molding, plastic forming process, and creatively adopting improved cold. Compression molding, punching and trimming at the same time of cold pressure holding, saving the process, one person can control multiple production lines at the same time, reducing labor costs, and high degree of automation, a finished product can be prepared in a few seconds. The production efficiency is greatly improved; at the same time, cold press forming, punching and trimming are carried out on one device, which reduces energy consumption.

DRAWINGS

1 is a schematic view showing a manufacturing process of a refrigerator compressor rear cover in an embodiment of the present application.

The drawings are as follows:

Coil winding 1, sheet 2, heating net 3, cold press punching machine 4, robot 5, edge winding 6, punching recovery frame 7, brake roller 8, K control cabinet in the figure is used to coordinate control The component is running.

detailed description

The present application will be further described in detail below through the specific embodiments and the accompanying drawings. The following examples are only illustrative of the present application and are not to be construed as limiting the application.

In the manufacturing method of the refrigerator compressor rear cover of the present invention, as shown in FIG. 1, the sheet 2 is pre-wound on the coil winding 1, and the brake roller 8 and the edge winding 6 are synchronously rotated to pull the sheet 2 to move forward. The heating net 3 is disposed directly above the moving direction of the sheet 2, and passes through the sheet 2 When the heating net 3 is preheated, in the moving direction of the sheet 2, the cold press punching integrated machine 4 is disposed adjacent to the heating net 3, and after the sheet 2 is heated by the heating net 3, it is cooled by the cold press punching machine 4. Pressing and punching trimming is done at one time. In the present invention, the cold press punching and unpacking machine 4 includes an upper die and a lower die according to a matching operation of the rear cover design of the refrigerator, and a punching knife and a cutter are disposed in the upper die, and correspondingly corresponding to the punching blade is disposed on the lower die. Punching and trimming; in production, after the sheet 2 has moved through the set length, the brake roller 8 and the edge winding 6 are suspended, and the upper mold is pressed down and the lower mold is closed to achieve cold press forming, due to processing The material is plastic. Therefore, it is necessary to maintain the pressure, that is, keep the upper and lower molds closed for several seconds. During this pressure holding process, the punching knife and the cutter in the upper mold punch out and punch the formed sheet. After completion, the punching knife and the cutter are retracted. At the same time, the pressure is completed and the upper mold is retracted. The whole process takes only a few seconds to prepare a molded product; then the brake roller 8 and the edge winding 6 continue to rotate. Drive the sheet 2 to move. Wherein, the sheet 2 is moved by the set length, and the set length is actually the length of the refrigerator compressor back cover of the present invention plus the set interval length, which can be based on the actual production of the refrigerator compressor back cover. Size depends.

It should be noted that the manufacturing method of the refrigerator compressor rear cover of the present invention is creatively employed by cold press forming, and a punching knife and a cutter are provided in the upper mold of the cold press, and punching is performed at the time of pressure keeping. Side, once formed, although the manufacturing method of the present invention is cold press forming, in fact, its specific operation mode is different from the conventional cold pressing or hot pressing, which is improved by the inventor according to the characteristics of the refrigerator compressor back cover. . The specific shape of the punching knife can be determined according to the shape of the rear cover of the refrigerator compressor, and the cutter actually cuts the rear cover of the refrigerator compressor from the sheet, and therefore, is designed along the periphery of the upper mold. . The difference and advantages between the present invention and the conventional advanced blistering process are also obvious: (1) blister manufacturing process The refrigerator compressor back cover is divided into two steps. The first step: a worker can only operate one machine when blistering, and the labor intensity is relatively high. In the second step, a worker is needed for punching and trimming, according to the traditional Production mode, six machines need six plastic workers plus at least one stamping worker, labor costs are high. In the manufacturing method of the present invention, the cold pressing and the punching and trimming are formed at one time, and the two stations are combined into one, only one worker is needed, and in the normal production mode, one can manage 5-6 at the same time. Production line. (2) The molding cycle of the blistering process is about 1-2 minutes, generally adopting a mold of 1 out of 2 or 1 out of 3; and the manufacturing method of the present invention has a molding cycle of about 10-20 seconds, and can also adopt 1 out of 2 or 1 out. 3 mold molding, the mold can also be switched according to actual needs, such as: can process 2-3 different products at the same time, only the appearance of the mold is the same height; it can be seen that the invention can greatly improve production efficiency and reduce production costs. (3) The invention can save electric energy, and can fully automate the production by using the invention, taking the molding cycle of 10 seconds as an example, the 10 seconds is the time of punching and trimming and taking out the product at the same time of cold press forming, in the process At the same time, we preheat the sheet or sheet and continuously produce it without causing heat loss. In the traditional blister process, the heating net has vacant time, and the punching and punching separately uses the energy consumption, and the energy consumption of the injection molding machine in the injection molding process. Larger; it can be seen that the manufacturing method of the present invention can save electrical energy. In general, the manufacturing method of the invention saves labor, can operate a plurality of production lines by one person, saves electric energy, has short production cycle and high efficiency. (4) In the existing blistering process, the sheet is directly cut into a set size and then placed in a blister station, and then the heating net is horizontally moved to the top of the sheet for heating. After the heating is completed, the heating net is removed. Mold blistering; heating and blistering are two separate steps in the whole process. When blistering, the heating net is idle, causing a large amount of heat loss; while in the method of the present invention, cold pressing is performed. Sheet for punching and trimming It is also preheated. After cold pressing and punching and trimming, the sheet is just preheated and can be immediately put into the cold press forming step. This shows that not only does it save a lot of heat, but also the heating and molding steps. Close connection, saving time and increasing production efficiency.

Further, in the present invention, it is preferred to preheat at 2 to 20 seconds at 70 to 150 °C. After holding the pressure and punching the edge, the manipulator 5 is directly used to take out the formed refrigerator compressor back cover for inspection or automatic packaging. The punched punch is directly dropped into the punching recovery frame 7, and the edge material is recovered by the edge winding 6 under the guidance of the winding force. It can be understood that, in addition to the use of the sheet, the usual sheet for preparing the refrigerator compressor back cover can also be used, and the specific material can also use the common PP, PVC or HIPS; in addition, in order to obtain different effects, it is also possible to use the hair. Foam sheet or foamed sheet. Among them, 70-150 °C is the heating temperature of the heating net, preheating for 2-20 seconds, and also the time for holding and taking out the product, that is to say heating during the pressure keeping process, and also punching in the process Trimming, the specific punching and trimming operation is as described above, and is not described here. In addition, in the present invention, in order to achieve a high degree of automation, the automatic control system is used to automatically control the coil winding 1, the heating net 3, the cold press punching integrated machine 4, the robot 5 and the edge winding 6, that is, as shown in FIG. K control cabinet, automatic control system can be operated according to the preset procedure, the whole process only needs manual supervision or assistance, which further reduces labor costs. It can be understood that the automatic control is actually coordinated control of the rotation of the brake roller 8 and the edge winding 6, the heating net switch, the upper mold clamping switch and the punching trim switch; that is, at the beginning of production, the heating net pair is first controlled. The sheet is heated, and after the heating is completed, that is, after 2-20 seconds, the rotation of the brake roller 8 and the edge winding 6 is controlled until the sheet moves to the set length, and the brake roller 8 and the edge winding 6 are controlled to stop rotating. Then, the upper mold is controlled to be pressed down to perform cold press forming, and the upper mold is controlled to be in a mold clamping state, that is, pressure is maintained, During the pressure maintaining process, the control punching knife and the cutting knife are extended to perform punching and trimming. After the punching and trimming is completed, the punching knife and the cutter are retracted, and then the upper mold is retracted, and then the control robot removes the product. After the product is removed, the brake roller 8 and the edge winding 6 are controlled to continue to rotate, and the next product is formed.

The manufacturing method of the refrigerator compressor rear cover of the present invention creatively adopts the improved cold pressing method for the manufacture of the refrigerator compressor rear cover, which not only saves labor cost, but also greatly improves production efficiency; the manufacturing method of the present invention is the fastest It takes a few seconds to make a product, and the blister method takes two to three minutes at the earliest, completely overturning the traditional injection molding or blistering method for preparing the refrigerator compressor back cover.

It can be understood that the method of the present invention is not only applicable to the preparation of the compressor back cover of the refrigerator, but also can be used for the preparation of the back cover of the washing machine, the rear cover of the water dispenser, the electronic tray, etc., and only the corresponding mold needs to be improved. In addition, it is also understood that the method of the present invention is actually a subversion of blistering and injection molding, and therefore, the method of the present invention can be employed for any product which can be prepared by blistering or injection molding.

However, the above is only the preferred embodiment of the present application, and it is of course not possible to limit the scope of the application of the present application, that is, the simple equivalent change and modification of the contents described in the claims and the description of the present application. All are still within the scope of the claims of the present application. In addition, the abstract sections and headings are only used to assist in the search for patent documents and are not intended to limit the scope of the claims.

Claims

A method for manufacturing a refrigerator compressor rear cover, characterized in that the manufacturing method comprises the following steps:

1) The sheet (2) is pre-wound on the coil winding (1), and the coil winding (1), the brake roller (8) and the edge winding (6) are synchronously rotated to pull the sheet (2) toward Before moving, the heating net (3) is disposed behind the horizontal direction of the brake roller (8) to preheat the passing sheet (2), and a cold press punching machine is disposed at a level adjacent to the heating net (3) ( 4) The cold press punching machine (4) includes an upper die and a lower die which are designed according to the shape of the rear cover of the refrigerator, wherein the upper die is provided with a punching knife and a cutter, and the lower die is correspondingly provided Punching and trimming corresponding to the punching knife;

2) When the sheet (2) is subjected to the cold press punching machine (4), the coil winding (1), the brake roller (8) and the edge winding (6) are suspended, and the upper mold and the lower portion are pressed. Describe the mold clamping to achieve cold forming and punching and trimming at one time;

3) when the upper mold and the lower mold hold the mold in the holding state for several seconds, the punching knife and the cutter in the upper mold punch out and punch the trimmed sheet, after completion The punching knife and the cutter are retracted while the pressure holding is completed, and the upper mold is retracted to prepare a molded product.
The manufacturing method according to claim 1, wherein the preheating temperature in the step 1) is 70 to 150 ° C, and the preheating time is 2 to 20 seconds.
The manufacturing method according to claim 1, characterized in that after the punching and trimming, the rear cover of the formed refrigerator compressor is taken out by a robot to perform inspection or automatic package.
The manufacturing method according to claim 1, wherein the sheet or sheet material is selected from the group consisting of sheets, sheets of PP, PVC or HIPS.
The manufacturing method according to claim 1, wherein the sheet or sheet of the PP, PVC or HIPS is a foamed sheet or a foamed sheet.