CN114851632A - A production process of blowing, printing and bag making of ordinary express bag - Google Patents

Abstract

The invention discloses a production process of blowing, printing and bag making of a common express bag, relates to the technical field of express bag production, and aims to solve the technical problem of low side edge strength of the express bag. The main points of the technical solution are: including mixing, heating and melting, film blowing, color printing, bottom heat sealing, side heat sealing, cutting and other steps. The purpose of the present invention is to provide a production process of blowing, printing and bag making of a common express bag.

Description

A production process of blowing, printing and bag making of ordinary express bag

technical field

The invention relates to the technical field of express bag production, more particularly, to a production process of blowing, printing and bag making of a common express bag.

Background technique

Courier bags refer to the bags used in the express industry to transport documents, documents, materials, goods, etc. At present, plastic courier bags made of polyethylene materials are mostly used, which have the characteristics of low cost, convenient use and good waterproof performance. .

In the production process of the existing courier bags, color printing and cutting are usually performed directly after the film is blown, and then the bottom of the courier bag is heat-sealed. The two sides of the courier bag are folded and squeezed for a long time after storage and transportation, which is prone to occur. damage, thereby affecting the quality of the courier bag.

Therefore, a new technical solution is urgently needed to solve the above technical problems.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a subject title.

The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a production process for blowing, printing, and bag-making of an ordinary express bag, characterized in that it comprises the following steps:

Step 1: Mix the materials, weigh 50 parts of polyethylene particles, 20 parts of starch, 10 parts of plasticizer, 5 parts of antistatic agent, 0.5 part of degrading agent, and 10 parts of degradation accelerator, mix and stir, and mix the mixture after mixing. The material is put into the heater for heating and heat preservation;

Step 2: heating and melting, pour the above mixture into the heating box for preliminary heating, so that the material is melted;

Step 3: Blow the film, pour the material obtained in step 2 into the film blowing machine for film blowing treatment, continuously extrude the barrel-shaped embryo film through the barrel-shaped extrusion port on the extrusion die, and cool the barrel-shaped embryo film. Plastic film, the barrel-shaped film is transferred to the transfer roller, the barrel-shaped plastic film is pressed to flat by the transfer roller, and finally formed into a roll film by a winder;

Step 4: Color printing, print the pre-designed pattern on the surface of the plastic film as required;

Step 5: heat-sealing the bottom end, and uniformly heat-sealing the surface of the plastic film by a heat-sealing device, so as to heat-seal the bottom end of the express bag in advance;

Step 6: heat-sealing the sides, and heat-sealing both sides of the plastic film by a heat-sealing device;

Step 7: Cutting, cut the heat-sealed plastic film along the heat-sealing strip at the bottom to obtain a courier bag with an opening on one side.

By adopting the above technical solution, adding a degrading agent to the raw material to improve its degradation performance and improve its environmental protection performance, and pre-heat-sealing the plastic film in step 5 to pre-heat-seal the bottom of the express bag, compared to one by one Heat-sealing the express bag effectively improves the production efficiency, and heat-sealing both sides of the express bag through step 6 further improves the strength of both sides of the express bag and reduces its damage during production and transportation.

The present invention is further set as follows: the temperature in the heater in the step 1 is 50-55°C.

The present invention is further set as follows: the heating temperature in the step 2 is 150-160°C.

The present invention further provides that: the heat sealing device in the step 5 and the step 6 includes a frame, the two ends of the frame are provided with a feeding component and a discharging component, and the first heat sealing device is arranged in the frame. sealing mechanism and second heat sealing mechanism.

The present invention further provides that: the first heat-sealing mechanism includes first fixing rods fixedly connected to both sides of the frame, and two heat-sealing pieces arranged up and down are rotatably connected between the two first fixing rods, and the The heat sealing element includes two rotating rods, the middle parts of the two rotating rods are respectively connected to the two first fixed rods through rotating shafts, and the two ends of the two rotating rods are provided with heat-sealing rollers, and also includes a heat-sealing roller for driving the two heat-sealing rods. Rotary drive assembly.

The present invention is further provided as follows: the rotating rod is provided with two sliding grooves extending through its two ends along its length direction, a sliding rod is slidably connected in the sliding groove, and the end of the sliding rod is connected to the end of the sliding groove. A first spring is arranged between the inner walls of the part, and the heat-sealing roller is arranged between the ends of the two sliding bars.

The present invention further provides that: the drive assembly includes a driven gear arranged on the rotating shaft, a motor is mounted on the first fixing rod, and an output shaft of the motor is mounted with a driving gear that meshes with the driven gear.

The present invention further provides that: the second heat sealing mechanism includes two second fixing rods vertically arranged on both sides of the frame, a connecting roller is rotatably connected between the second fixing rods, and between the two fixing rods Two heat-sealing wheels are arranged above the connecting rollers.

According to the present invention, a sliding groove is formed on the opposite surfaces of the two fixing rods along the height direction thereof, a sliding block is slidably connected in the sliding groove, and a second spring is arranged between the sliding block and the inner wall of the top end of the sliding groove. A rotating shaft is rotatably connected between the two sliding blocks, the two heat-sealing wheels are slidably connected to the rotating shaft, and a positioning member for positioning the heat-sealing wheels is also included.

The present invention is further provided that: the inner wall of the heat-sealing wheel is extended to both sides with a sliding sleeve that is slidably connected to the rotating shaft, the positioning member is a bolt threadedly connected to the sliding sleeve, and the end of the bolt is pressed against the sliding sleeve. Turn the shaft.

The present invention has the following beneficial effects:

1. Heat-sealing the plastic film in advance through step 5 to heat-seal the bottom of the courier bag in advance effectively improves the production efficiency compared to heat-sealing the courier bag one by one.

2. Heat sealing on both sides of the courier bag through step 6 to further improve the strength of both sides of the courier bag and reduce the occurrence of damage during production and transportation.

3. Drive two heat-sealing rollers to heat-seal the plastic film alternately by setting the drive assembly. According to the length of the express bag, adjust the movement speed of the plastic film and the rotation speed of the rotating rod to control the heat-sealing distance of the heat-sealing roller. The production efficiency is effectively improved, and by adjusting the distance between the two heat-sealing wheels, the sides of express bags of different widths can be heat-sealed.

Description of drawings

Fig. 1 is the production step schematic diagram of this embodiment;

FIG. 2 is a schematic three-dimensional structure diagram of the heat sealing device of the present embodiment;

3 is a schematic cross-sectional view of a part of the structure of this embodiment;

Fig. 4 is the partial enlarged schematic diagram of part A in Fig. 2 of the present embodiment;

FIG. 5 is a partial enlarged schematic diagram of part B in FIG. 2 of the present embodiment.

Description of drawings: 1. Frame; 2. Feeding roller; 3. Discharging roller; 4. First fixed rod; 5. Rotating rod; 6. Rotating shaft; 7. Heat-sealing roller; 8. Driven gear; 9 , motor; 10, driving gear; 11, chute; 12, sliding rod; 13, first spring; 14, second fixed rod; 15, connecting roller; 16, heat sealing wheel; 17, sliding groove; 18, sliding block; 19, second spring; 20, rotating shaft; 21, sliding sleeve; 22, bolt.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Wherein the same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top" "Face", "inner" and "outer" refer to directions toward or away from the geometric center of a particular part, respectively.

As shown in the figure, a production process for blowing, printing and bag making of ordinary express bags is characterized in that it includes the following steps:

Step 1: Mix the materials, weigh 50 parts of polyethylene particles, 20 parts of starch, 10 parts of plasticizer, 5 parts of antistatic agent, 0.5 part of degrading agent, and 10 parts of degradation accelerator, mix and stir, and mix the mixture after mixing. The material is put into the heater for heating and heat preservation, and the temperature in the heater is 50-55℃;

Step 2: heating and melting, pour the above mixture into a heating box for preliminary heating, and the heating temperature is 150-160 ° C, so that the material is melted;

Step 3: Blow the film, pour the material obtained in step 2 into the film blowing machine for film blowing treatment, continuously extrude the barrel-shaped embryo film through the barrel-shaped extrusion port on the extrusion die, and cool the barrel-shaped embryo film. Plastic film, the barrel-shaped film is transferred to the transfer roller, the barrel-shaped plastic film is pressed to flat by the transfer roller, and finally formed into a roll film by a winder;

Step 4: Color printing, print the pre-designed pattern on the surface of the plastic film as required;

Step 5: heat-sealing the bottom end, and uniformly heat-sealing the surface of the plastic film by a heat-sealing device, so as to heat-seal the bottom end of the express bag in advance;

Step 6: heat-sealing the sides, and heat-sealing both sides of the plastic film by a heat-sealing device;

Step 7: Cutting, cut the heat-sealed plastic film along the heat-sealing strip at the bottom to obtain a courier bag with an opening on one side.

By adding a degrading agent to the raw material, its degradation performance and environmental protection performance can be improved, and the plastic film is pre-heat-sealed in step 5 to pre-heat-seal the bottom of the express bag, compared to heat-sealing the express bag one by one. The production efficiency is effectively improved, and the two sides of the courier bag are heat-sealed through step 6, which further improves the strength of both sides of the courier bag and reduces the occurrence of damage during production and transportation.

The heat sealing device in step 5 and step 6 includes a frame 1, both ends of the frame 1 are provided with a feeding assembly and a discharging assembly, and the feeding assembly includes two feeding rollers 2 rotatably connected to the frame 1. , the discharge assembly includes two discharge rollers 3 that are rotatably connected to the frame 1, and the plastic film is clamped by the feed roller 2 and the discharge roller 3, so that the plastic film is located at a suitable height position, and the frame 1 is provided with There are a first heat-sealing mechanism and a second heat-sealing mechanism to heat-seal both sides of the express bag while heat-sealing the bottom of the express bag.

The first heat-sealing mechanism includes a first fixing rod 4 fixedly connected to both sides of the frame 1, and two heat-sealing members arranged up and down are rotatably connected between the two first fixing rods 4, and the heat-sealing member includes two rotating rods. Rod 5, the middle parts of the two rotating rods 5 are respectively connected to the two first fixed rods 4 through the rotating shaft 6, and the rotating rod 5 is provided with two sliding grooves 11 running through its two ends along its length direction, and sliding in the sliding groove A sliding rod 12 is connected, a first spring 13 is arranged between the end of the sliding rod and the inner wall of the end of the chute, and a heat sealing roller 7 is rotatably connected between the ends of the two sliding rods, and also includes a device for driving the two sliding rods. A drive assembly for rotating the heat seal, the drive assembly includes a driven gear 8 arranged on the rotating shaft 6 , a motor 9 is installed on the first fixing rod 4 , and the output shaft of the motor 9 is installed with a driving gear meshing with the driven gear 8 . 10.

The two rotating rods 5 are driven by the motor to move in the opposite direction. When the two heat-sealing rollers 7 are in contact with each other, the plastic film is clamped. While the plastic film continues to move, the two heat-sealing rollers 7 also continue to rotate, so that the sliding rods move along the Sliding along the chute, the first spring is compressed. When the two heat-sealing rollers 7 continue to move, under the action of the spring force, the two heat-sealing rollers 7 are gradually reset and finally separated, so as to fully heat the plastic film. effect,

The second heat-sealing mechanism includes two second fixing rods 14 vertically arranged on both sides of the frame 1 , a connecting roller 15 is rotatably connected between the second fixing rods 14 , and the two fixing rods are located above the connecting roller 15 Two heat-sealing wheels 16 are provided, and the opposite surfaces of the two second fixing rods 14 are provided with sliding grooves 17 along the height direction thereof. The sliding grooves 17 are slidably connected with a sliding block 18, and the sliding block 18 is connected to the top inner wall of the sliding groove. A second spring 19 is arranged between the two sliding blocks 18, a rotating shaft 20 is rotatably connected between the two sliding blocks 18, and the inner wall of the heat sealing wheel 16 is extended to both sides with a sliding sleeve 21 that is slidably connected to the rotating shaft 20, and also includes a A positioning member for positioning the heat sealing wheel 16 .

The plastic film passes over the connecting roller 15, and the two heat sealing wheels 16 are located above the plastic film. Heat sealing effect on the sides.

The positioning member is a bolt 22 threaded on the sliding sleeve. The end of the bolt 22 is pressed against the rotating shaft 20. When producing express bags of different widths, the bolts 22 can be loosened to adjust the position of the two heat sealing wheels 16. , and the two heat-sealing wheels 16 can be positioned by tightening the bolts 22 .

The specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contribution to the present embodiment as needed after reading this specification, but only in the claims of the present invention are protected by patent law.

Claims (10)

1. A production process for blowing, printing and making a common express bag is characterized by comprising the following steps:

the method comprises the following steps: mixing 50 parts of polyethylene particles, 20 parts of starch, 10 parts of plasticizer, 5 parts of antistatic agent, 0.5 part of degradation agent and 10 parts of degradation promoter, mixing and stirring, and putting the mixed materials into a heater for heating and heat preservation;

step 2: heating and melting, namely pouring the mixed material into a heating box for preliminary heating to melt the material;

and step 3: blowing the film, namely pouring the material obtained in the step 2 into a film blowing machine for film blowing treatment, continuously extruding a barrel-shaped blank film through a barrel-shaped extrusion port on an extrusion die head, cooling the barrel-shaped blank film to treat a barrel-shaped plastic film, conveying the barrel-shaped plastic film to a tension roller, pressing the barrel-shaped plastic film to be flat by the tension roller, and finally forming a film coil through a winding machine;

and 4, step 4: color printing, namely printing a pre-designed pattern on the surface of the plastic film according to requirements;

and 5: performing bottom end heat sealing, namely performing uniform heat sealing on the surface of the plastic film through a heat sealing device so as to perform heat sealing on the bottom end of the express bag in advance;

step 6: performing side heat sealing, namely performing heat sealing on two sides of the plastic film through a heat sealing device;

and 7: and cutting, namely cutting the heat-sealed plastic film along a heat sealing strip at the bottom to obtain the express bag with one side open.

2. The production process of blowing, printing and bag making of the common express delivery bag according to claim 1, characterized in that: the temperature in the heater in the step 1 is 50-55 ℃.

3. The production process of blowing, printing and bag making of the common express delivery bag according to claim 1, characterized in that: the heating temperature in the step 2 is 150-160 ℃.

4. The production process of blowing, printing and bag making of the common express delivery bag according to claim 1, characterized in that: the heat sealing device in the step 5 and the step 6 comprises a frame, a feeding assembly and a discharging assembly are arranged at two ends of the frame, and a first heat sealing mechanism and a second heat sealing mechanism are arranged in the frame.

5. The production process of blowing, printing and making the common express delivery bag according to claim 4, wherein the production process comprises the following steps: first heat-seal mechanism includes fixed connection in the first dead lever of frame both sides, rotates between two first dead levers to be connected with two heat seals that set up from top to bottom, the heat seal includes two dwangs, and the middle part of two dwangs rotates through the pivot respectively and connects in two first dead levers, and the both ends of two dwangs are provided with the heat-seal roller, still including being used for driving two heat seals pivoted drive assembly.

6. The production process of blowing, printing and making the common express delivery bag according to claim 5, wherein the production process comprises the following steps: two chutes which respectively penetrate through the two ends of the dwang are formed in the length direction of the dwang, slide rods are connected in the chutes in a sliding mode, first springs are arranged between the end portions of the slide rods and the inner walls of the end portions of the chutes, and the heat sealing rollers are arranged between the end portions of the two slide rods.

7. The production process of blowing, printing and bag making of the common express delivery bag according to claim 6, characterized in that: the driving assembly comprises a driven gear arranged on the rotating shaft, a motor is installed on the first fixing rod, and a driving gear meshed with the driven gear is installed on an output shaft of the motor.

8. The production process of blowing, printing and making the common express delivery bag according to claim 7, wherein the production process comprises the following steps: the second heat sealing mechanism comprises two second fixing rods vertically arranged on two sides of the rack, a connecting roller is rotatably connected between the second fixing rods, and two heat sealing wheels are arranged between the two second fixing rods and above the connecting roller.

9. The production process of blowing, printing and making the common express delivery bag according to claim 8, wherein the production process comprises the following steps: the sliding groove has been seted up along its direction of height on the surface that two dead levers are relative, sliding connection has the sliding block in the sliding groove, be provided with the second spring between the top inner wall of sliding block and sliding groove, rotate between two sliding blocks and be connected with the axis of rotation, two heat-seal wheel sliding connection are in the axis of rotation, still including being used for taking a positioning role to the heat-seal wheel setting element.

10. The production process of blowing, printing and making the common express delivery bag according to claim 9, wherein the production process comprises the following steps: the inner wall of the heat sealing wheel extends towards two sides to be provided with sliding sleeves in sliding connection with the rotating shaft, the positioning piece is a bolt in threaded connection with the sliding sleeves, and the end portion of the bolt is tightly abutted to the rotating shaft.

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