阅读说明：本技术 一种打孔膜的打孔装置及打孔方法 (Punching device and punching method for punched film ) 是由 方小梅 吴金明 张启红 于 2019-10-09 设计创作，主要内容包括：本发明公开了一种打孔膜的打孔装置及打孔方法,其中,所述打孔装置包括挤出机构,用于挤出膜体；成型鼓,所述成型鼓为中空结构,所述成型鼓的鼓面设置有成型孔,所述成型鼓还设置有抽气口；真空泵,连接至所述成型鼓的抽气口；冷却装置,设置于所述挤出机构和所述成型鼓之间；收卷辊,用于卷取打孔后的膜体；张紧辊,设置于所述成型鼓与所述收卷辊之间；其中,膜体从挤出机构挤出后,冷却装置对膜体降温冷却,成型鼓对膜体打孔形成打孔膜,收卷辊卷取打孔膜。本发明中,通过设置冷却装置,能够及时对膜体进行降温冷却,从而降低膜体的延展性,增加膜体的脆性,能够有效的减缓负压打孔过程中成型孔对膜体的牵拉作用导致出现异型孔的发生。(The invention discloses a punching device and a punching method of a punched film, wherein the punching device comprises an extrusion mechanism, a punching mechanism and a punching mechanism, wherein the extrusion mechanism is used for extruding a film body; the forming drum is of a hollow structure, a forming hole is formed in the drum surface of the forming drum, and an air suction opening is formed in the forming drum; a vacuum pump connected to the suction opening of the building drum; a cooling device disposed between the extrusion mechanism and the forming drum; the winding roller is used for winding the punched film body; the tensioning roller is arranged between the forming drum and the winding roller; wherein, the back is extruded from extrusion mechanism to the film body, and cooling device cools off the film body cooling, and the shaping drum punches to the film body and forms the membrane of punching, and the wind-up roll batches the membrane of punching. According to the invention, the cooling device is arranged, so that the film body can be cooled in time, the ductility of the film body is reduced, the brittleness of the film body is increased, and the occurrence of special-shaped holes caused by the drawing effect of the forming holes on the film body in the negative pressure punching process can be effectively reduced.)

1. The utility model provides a perforating device of punching film which characterized in that: comprises that

The extrusion mechanism is used for extruding the film body;

the forming drum is of a hollow structure, a forming hole is formed in the drum surface of the forming drum, and an air suction opening is formed in the forming drum;

a vacuum pump connected to the suction opening of the building drum;

a cooling device disposed between the extrusion mechanism and the forming drum;

the winding roller is used for winding the punched film body;

the tensioning roller is arranged between the forming drum and the winding roller;

wherein, the back is extruded from extrusion mechanism to the film body, and cooling device cools off the film body cooling, and the shaping drum punches to the film body and forms the membrane of punching, and the wind-up roll batches the membrane of punching.

2. The perforating device for perforated films as recited in claim 1, further comprising: the cooling device comprises

The device comprises two oppositely arranged cooling plates, wherein a film passing gap for a perforated film to pass through is formed between the two cooling plates;

a storage tank for storing a cooling liquid;

driving the pump;

wherein the cooling plate, the storage tank and the drive pump form a cooling circuit.

3. The perforating device for perforating films as recited in claim 2, further comprising: the cooling plate is internally provided with a zigzag channel.

4. The perforating device for perforated films as recited in claim 1, further comprising: the forming drum is characterized by further comprising a net cage, wherein the outer surface of the forming drum is sleeved with the net cage, and the hole pattern of the net cage is the same as that of the forming holes.

5. A method for perforating a perforated film, comprising: comprises that

The film body is extruded by the extruding mechanism;

cooling the extruded film body;

carrying out negative pressure punching on the cooled film body to form a punched film;

the punched film was wound up.

6. The method of perforating a perforated film according to claim 5, characterized in that: cooling the extruded film body, comprising

And starting the driving pump to pump the cooling liquid in the storage tank into the two cooling plates, so that the film body passes through the film passing gap between the two cooling plates, and the cooling liquid cools the film body.

Technical Field

The invention relates to the technical field of punching film preparation equipment, in particular to a punching device and a punching method for a punching film.

Background

Punching a film: plastic films with open pore structures are currently used in face layers of sanitary napkins and pantiliners.

Disclosure of Invention

According to the defects of the prior art, the invention provides the punching device and the punching method of the punched film, so that the appearance of special-shaped holes in the punched film is effectively reduced.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

as a first aspect of the present invention, there is provided a punching apparatus for punching a film, comprising

The extrusion mechanism is used for extruding the film body;

the forming drum is of a hollow structure, a forming hole is formed in the drum surface of the forming drum, and an air suction opening is formed in the forming drum;

a vacuum pump connected to the suction opening of the building drum;

a cooling device disposed between the extrusion mechanism and the forming drum;

the winding roller is used for winding the punched film body;

the tensioning roller is arranged between the forming drum and the winding roller;

wherein, the back is extruded from extrusion mechanism to the film body, and cooling device cools off the film body cooling, and the shaping drum punches to the film body and forms the membrane of punching, and the wind-up roll batches the membrane of punching.

As an alternative embodiment, the cooling device comprises

The device comprises two oppositely arranged cooling plates, wherein a film passing gap for a perforated film to pass through is formed between the two cooling plates;

a storage tank for storing a cooling liquid;

driving the pump;

wherein the cooling plate, the storage tank and the drive pump form a cooling circuit.

As an alternative embodiment, a zigzag channel is provided in the cooling plate.

As an optional implementation manner, the forming drum further comprises a net cage sleeved on the outer surface of the forming drum, and the hole type of the net cage is the same as that of the forming holes.

As a second aspect of the present invention, there is provided a method of perforating a perforated film, comprising

The film body is extruded by the extruding mechanism;

cooling the extruded film body;

carrying out negative pressure punching on the cooled film body to form a punched film;

the punched film was wound up.

As an optional embodiment, the cooling of the extruded film body comprises

And starting the driving pump to pump the cooling liquid in the storage tank into the two cooling plates, so that the film body passes through the film passing gap between the two cooling plates, and the cooling liquid cools the film body.

The invention has the beneficial effects that:

according to the invention, after the film body is extruded, the cooling device is arranged between the extruding mechanism and the forming drum, so that the film body can be cooled in time, the ductility of the film body is reduced, and the brittleness of the film body is increased, so that when the film body is subjected to negative pressure punching through the forming drum, the occurrence of special-shaped holes caused by the traction effect of the forming holes on the film body in the negative pressure punching process can be effectively reduced, the punching forming rate is ensured, and the occurrence probability of the special-shaped holes is effectively reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of the present embodiment;

FIG. 2 is a detailed view of a portion of the cooling device of the present embodiment;

fig. 3 is a partial detailed view of the cooling plate of the present embodiment.

In the figure, 1-extrusion mechanism, 2-cooling device, 21-storage tank, 22-driving pump, 23-cooling plate, 24-film passing gap, 3-forming drum, 31-forming hole, 4-vacuum pump, 5-tensioning roller, 6-winding roller, 7-mesh cage and 100-film body.

Detailed Description

The following embodiments are provided to describe the embodiments of the present invention, and to further describe the detailed description of the embodiments of the present invention, such as the shapes, configurations, mutual positions and connection relationships of the components, the functions and operation principles of the components, the manufacturing processes and operation methods, etc., so as to help those skilled in the art to more fully, accurately and deeply understand the inventive concept and technical solutions of the present invention.

As a first aspect of the present invention, there is provided a perforating device for perforating a film, as shown in FIGS. 1 to 3, comprising

An extrusion mechanism 1 for extruding the film body 100;

the forming drum 3 is of a hollow structure, a forming hole 31 is formed in the drum surface of the forming drum 3, and the forming drum 3 is further provided with an air suction opening;

a vacuum pump 4 connected to a suction opening of the forming drum 3;

a cooling device 2 arranged between the extrusion mechanism 1 and the forming drum 3;

the winding roller 6 is used for winding the punched film body 100;

a tension roller 5 disposed between the forming drum 3 and the wind-up roller 6;

wherein, the film body 100 is extruded from the extrusion mechanism 1, and cooling device 2 cools down film body 100, and forming drum 3 punches to film body 100 and forms the membrane of punching, and wind-up roll 6 batches the membrane of punching.

According to the invention, after the film body 100 is extruded, the cooling device 2 is arranged between the extruding mechanism 1 and the forming drum 3, so that the film body 100 can be cooled in time, the ductility of the film body 100 is reduced, and the brittleness of the film body 100 is increased, so that when the film body 100 is subjected to negative pressure punching through the forming drum 3, the occurrence of special-shaped holes caused by the drawing effect of the forming holes 31 on the film body 100 in the negative pressure punching process can be effectively relieved, the punching forming rate is ensured, and the occurrence probability of the special-shaped holes is effectively reduced.

As an alternative embodiment, as shown in fig. 2, the cooling device 2 comprises

Two oppositely arranged cooling plates 23, wherein a film passing gap 24 for a perforated film to pass through is formed between the two cooling plates 23;

a storage tank 21 for storing a coolant;

driving the pump 22;

wherein the cooling plate 23, the storage tank 21 and the drive pump 22 form a cooling circuit.

Like this, through setting up two cooling plate 23 that set up relatively, and make and form between two cooling plate 23 and cross membrane gap 24, and make the membrane body 100 pass this and cross membrane gap 24, drive pump 22 is gone into cooling plate 23 with the coolant liquid pump, so that cross and form the low temperature section in the membrane gap 24, when the membrane body 100 passes this and crosses membrane gap 24, can effectual membrane body 100 cool down and handle, thereby reach the ductility of the lecture membrane body 100, increase the fragile purpose of membrane body 100, help forming drum 3 to reduce the appearance of abnormal hole when negative pressure punches.

Alternatively, as shown in fig. 3, zigzag channels are provided in the cooling plate 23.

Therefore, the sufficient energy exchange between the cooling liquid and the cooling plate 23 can be ensured, and the cooling plate 23 is efficiently cooled, so that the film passing gap 24 is kept in a good cooling environment.

As an optional embodiment, the forming device further comprises a net cage 7 sleeved on the outer surface of the forming drum 3, and the hole type of the net cage 7 is the same as that of the forming holes 31.

As a second aspect of the present invention, there is provided a method of perforating a perforated film, comprising

S10, extruding the film body 100 by the extruding mechanism 1;

s20, cooling the extruded film body 100;

optionally, the extruded film body 100 is cooled, including starting the driving pump 22 to pump the cooling liquid in the storage tank 21 into the two cooling plates 23, so that the film body 100 passes through the film passing gap 24 between the two cooling plates 23, so that the cooling liquid cools the film body 100.

S30, carrying out negative pressure punching on the cooled film body 100 to form a punched film;

s40, winding the punched film.

In the invention, after the film body 100 is extruded, the film body 100 is cooled firstly, the ductility of the film body 100 is reduced, the brittleness of the film body 100 is improved, and then the forming drum 3 is used for carrying out negative pressure punching, so that the generation of special-shaped holes caused by the drawing action of the forming holes 31 on the film body 100 in the negative pressure punching process can be effectively reduced, and the punching effect is optimized.

The invention has been described in an illustrative manner, and it is to be understood that the invention is not limited to the precise form disclosed, and that various insubstantial modifications of the inventive concepts and solutions, or their direct application to other applications without such modifications, are intended to be covered by the scope of the invention. The protection scope of the present invention shall be subject to the protection scope defined by the claims.