Plastic film unfolding rack

Abstract

The present invention discloses a plastic film unfolding frame, which is mainly composed of an opener, a cutting knife, a cutting knife support column, a truncated cone unfolder, an air inlet pipe, a support frame, a reeling roller and a reeling roller. The film unfolding frame is arranged in a straight line, the cutting knife is located in the middle of the opener, the opener is tongue-shaped, the opener is fixedly connected to the truncated cone unfolder, an air hole is opened at the front end of the opener, an air hole is opened on the surface of the truncated cone unfolder, the truncated cone unfolder is fixed on the support frame, a slide rail is arranged on the support frame, and the air inlet pipe is connected to the rear of the unfolder. The reeling roller is located in front of the opener and parallel to the opener, guiding the plastic film to enter the unfolding frame, and the purpose of blowing open the double-layer film can be achieved by ventilation through the front end air hole. The plastic film unfolding frame of the present invention can ensure that the strokes of various parts of the film are the same during the unfolding process, and at the same time, the contact area between the film and the unfolding frame is reduced by using the air film, so as to avoid problems caused by the film being pulled during the process, thereby improving the quality level of the film.

Description

Technical Field

[0001] The invention relates to the field of plastic film processing equipment, in particular to a plastic film unfolding frame. Background Art

[0002] The film unfolding rack is a widely used device in the process of plastic film blowing. It can split the double-layer film blown by the film blowing machine head and unfold it into one layer.

[0003] The working process of the traditional film unfolding rack is as follows: under the traction of the traction equipment, the flattened double-layer film is first cut open by a cutter, and then a triangular unfolding rack opened to both sides is used to gradually expand the film and stretch it into a single layer during the traction process.

[0004] When a traditional unfolding rack is used to unfold a plastic film, the film will adhere to the unfolding rack, causing the film to be blocked from sliding. At the same time, the distance traveled by the two ends of the stretched film will be longer than that of the middle part of the film. These two factors will cause the film to be pulled during the unfolding process, eventually resulting in uneven film thickness or even film tearing.

[0005] In order to improve the shortcomings of the above-mentioned traditional unfolding rack, this patent proposes a plastic film unfolding rack. Summary of the invention

[0006] The purpose of the present invention is to provide a plastic film unrolling rack, which improves the shortcomings of traditional unrolling racks such as film adhesion and inconsistent travel between the two ends and the middle part of the film, thereby improving the production efficiency of high-viscosity plastic films and product quality assurance.

[0007] The scheme for achieving the above purpose is: a plastic film unfolding frame, which is mainly composed of an opener, a cutting knife, a cutting knife support column, a truncated cone unfolder, an air inlet pipe, a support frame, a reel and a reel. The film unfolding frame is arranged in a straight line, the cutting knife is located in the middle of the opener, the opener is tongue-shaped, the opener is fixedly connected to the truncated cone unfolder, an air hole is opened at the front end of the opener, an air hole is opened on the surface of the truncated cone unfolder, the truncated cone unfolder is fixed on the support frame, a slide rail is provided on the support frame, and the air inlet pipe is connected to the rear of the unfolder. The reel is located in front of the opener and parallel to the opener to guide the plastic film into the unfolding frame. The opener is a thin-walled container with a hole at the front end, the surface is smooth, and the width is narrower than the folded diameter of the film. The purpose of blowing open the double-layer film can be achieved by ventilation through the air hole at the front end.

[0008] The present invention discloses a plastic film unfolding frame, wherein a truncated cone unfolder is fixed on a supporting frame and is a closed thin-walled container with holes on the surface. The small circle at the inlet is a complete circular ring, the diameter of which is slightly shorter than the folded diameter of the film and slightly longer than the width of the opener, and the outlet is a semicircular arc, the diameter of which is twice the folded diameter of the film. The entire surface of the truncated cone unfolder is ventilated to form an air film effect, so that the plastic film and the surface of the unfolder are not in contact. The use of a truncated cone shape as a transition can ensure that the strokes at both ends of the film are consistent with the middle part. The front of the truncated cone unfolder is connected to the opener for a smooth transition, and the rear of the truncated cone unfolder is a curved transition structure, which unfolds the film from an arc state to a plane.

[0009] The invention discloses a plastic film unfolding frame, wherein a cutter is fixed on a cutter support column, and the cutter support column can slide along a slide rail on the support frame to ensure that the front and rear positions of the cutter are adjustable. The cutter is located in the middle of the opening device, which reduces the travel gap between the two ends and the middle part of the film, and the height of the cutter can be adjusted on the support column.

[0010] The invention discloses a plastic film unfolding frame. An air inlet pipe is connected to a truncated cone unfolder through an opening. The air inlet pipe is provided with an adjusting device to control the air intake amount.

[0011] The invention discloses a plastic film unfolding frame, wherein a winding roller is located at the rear of a truncated cone unfolder, an outer spiral pattern is engraved on the winding roller, and a spiral line is respectively arranged at the left and right ends, with opposite rotation directions, for slightly unfolding the film to both sides to reduce wrinkles on the film.

[0012] The beneficial effects of the plastic film unfolding rack of the present invention are: ensuring that the travel of each part of the film is the same during the unfolding process, while utilizing the air film to reduce the contact area between the film and the unfolding rack, avoiding problems caused by the film being pulled during the process, and improving the quality level of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of a plastic film unfolding frame of the present invention.

[0014] In the figure: 1 unwinding roller, 2 opener, 3 round table unfolder, 4 winding roller, 5 support frame, 6 air inlet pipe, 7 cutting knife, 8 cutting knife support column. DETAILED DESCRIPTION

[0015] The present invention provides a plastic film unfolding frame, such as Figure 1 As shown, it includes an unwinding roller 1, an opener 2, a truncated cone unfolder 3, a winding roller 4, a support frame 5, an air inlet pipe 6, a cutting knife 7 and a cutting knife support column 8.

[0016] The plastic film is pulled into the opening device 2 by the unwinding roller 1. The opening device 2 is solidly connected to the truncated cone opener 3, and its width is narrower than the folded diameter of the film. The inside of the opening device is connected to the truncated cone opener 3 to introduce gas and the gas is discharged at the front air hole. The air flow blows out to the front, and during the film pulling process, the two layers of film bonded together are blown apart to achieve the opening.

[0017] The present invention provides a plastic film unfolding frame, wherein a cutter 7 is fixed on a cutter support column 8, and the cutter 7 is located in the middle and lower part of an opener 2 and close to the opener 2, and cuts the film for subsequent unfolding operation when the film passes through. The cutter support column 8 can slide along a slide rail on a support frame 5 to ensure that the position of the cutter 7 is adjustable, and the position of the cutter 7 is adjusted according to actual conditions during production.

[0018] The present invention discloses a plastic film unfolding frame, wherein a truncated cone unfolder 3 is fixed on a support frame 5, and the inlet diameter is slightly shorter than the folded diameter of the film to ensure that the film can enter the truncated cone transition section without obstacles. The outlet is a semicircular arc, and the diameter is twice the folded diameter of the film, so as to achieve the purpose of fully unfolding the film. The surface of the entire truncated cone unfolder is densely perforated and ventilated to form an air film effect, so as to achieve the purpose of no contact between the film and the unfolder surface. Using a truncated cone shape as a transition can ensure that the strokes of the two ends of the film are consistent with the middle part. After the film is unfolded into an arc shape, it is unfolded into a plane through a curved transition section for easy winding.

[0019] The present invention provides a plastic film unfolding frame, wherein an air inlet pipe 6 is connected to a truncated cone unfolder 3 through an opening, and an air volume regulating device is installed on the air inlet pipe 6 to facilitate control during production.

[0020] The invention discloses a plastic film unwinding frame, wherein a winding roller 4 is located behind a truncated cone unwinder 3. The roller is engraved with an external spiral pattern, and one spiral pattern is arranged at each of the left and right ends of the roller and the spiral patterns are opposite. When the film passes through, the film can be slightly unrolled to both sides to reduce wrinkles on the film. After the film is unrolled, the film is rolled up to complete a series of operations.

Claims

1. A plastic film unwinding frame, mainly composed of an opener, a cutter, a cutter support column, a round table unwinder, an air inlet pipe, a support frame, an unwinding roller and a winding roller, characterized in that: The film unfolding frame is arranged in a straight line, the cutting knife is located in the middle of the opener, the opener is tongue-shaped, the opener is fixedly connected to the truncated cone unfolder, an air hole is opened at the front end of the opener, and an air hole is opened on the surface of the truncated cone unfolder. The truncated cone unfolder is fixed on a supporting frame, a slide rail is arranged on the supporting frame, and an air inlet pipe is connected to the rear of the unfolder; the unwinding roller is located in front of the opener and parallel to the opener to guide the plastic film into the unfolding frame; the width of the opener is narrower than the folded diameter of the film; the inlet of the truncated cone unfolder is a complete circular ring, the diameter of the inlet circular ring is slightly narrower than the folded diameter of the film, and slightly wider than the width of the opener, and the outlet is a semicircular arc with a diameter twice the folded diameter of the film.

2. A plastic film unfolding stand according to claim 1, characterized in that: The air intake pipe is provided with a regulating device capable of controlling the air intake amount.

3. The plastic film unfolding stand according to claim 1, characterized in that: The cutting knife support column can slide along the slide rail on the support frame.

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