CN114055854B

CN114055854B - Film slitting and heat sealing equipment

Info

Publication number: CN114055854B
Application number: CN202111355017.5A
Authority: CN
Inventors: 马世琨; 周宏涛; 夏青山
Original assignee: Henan Keseide New Material Co ltd
Current assignee: Henan Keseide New Material Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2023-07-07
Anticipated expiration: 2041-11-16
Also published as: CN114055854A

Abstract

The invention relates to a film slitting and heat sealing device. The equipment comprises a frame, wherein a mounting block is arranged on the frame through vertical movement of a first power mechanism, two heat sealing knives are arranged at the lower end of the mounting block, the mounting block is of a U-shaped structure, a through groove is formed in the upper end face of the mounting block, a heat cutter is movably arranged in the through groove in the vertical direction, and a second power mechanism is arranged on the mounting block. The installation block is provided with two installation arms, and each installation arm is provided with the heat-sealing knife. Each mounting arm is provided with a mounting groove, scraping plates are rotatably mounted on two vertical groove walls of each mounting groove through rotating shafts, and torsion springs are arranged on each rotating shaft. The hot cutter comprises a cutter head and a cutter head mounting plate, wherein the cutter head comprises a cutter tip and wedge-shaped surfaces at two sides, and the two scraping plates are respectively corresponding to the corresponding wedge-shaped surfaces to scrape foreign matters on the corresponding wedge-shaped surfaces in the up-and-down movement process of the hot cutter. According to the scheme, the torsion spring is utilized to realize that the scraping plate automatically scrapes the foreign matters on the cutter head, so that the foreign matters are easy to control, the film below the cutter head cannot be adversely affected, and the cutter head is convenient to use.

Description

Film slitting and heat sealing equipment

Technical Field

The invention relates to the technical field of film processing, in particular to film slitting and heat sealing equipment.

Background

The film needs heat sealing and slitting in the bag making process, two heat sealing knives are used for heat sealing the double-layer film, and a heat cutter arranged between the two heat sealing knives is used for cutting and slitting. The hot cutter is in direct contact with the plastic film, and abnormal conditions such as too high temperature can be caused to occur to the hot cutter due to inaccurate temperature control of the hot cutter, at the moment, the plastic film contacted with the hot cutter can be partially melted and stuck to the hot cutter, after the temperature of the hot cutter returns, plastic sticky masses stuck to the hot cutter become hard points, the problem of hot cutter sticky materials can occur during the next cutting, and even the problem of burrs and wiredrawing can occur to the edge cutting of the film. And these hard spots tend to adhere to the wedge surface of the hot knife. In order to solve the problems, a hot air slit is formed on one side surface of each heat sealing knife facing the hot knife, a hot air cavity communicated with the hot air slit is formed in each heat sealing knife, and the hot air cavity is communicated with an air supply mechanism through a pipeline. Foreign matter on the hot cutter is blown off by hot air supply. However, the scheme has the problems that the quantity of the foreign matters on the hot cutter cannot be blown off when the air supply quantity is small in actual production, and quality problems occur when the lower film is blown out of the wave folds and the folds to cause film heat sealing and slitting when the air supply quantity is large, so that the use is inconvenient.

Disclosure of Invention

The invention aims to provide film slitting and heat sealing equipment which solves the problem that the use of the mode of blowing off foreign matters on a hot cutter by hot air in the prior art is inconvenient.

In order to achieve the above purpose, the film slitting and heat sealing equipment provided by the invention adopts the following technical scheme: the film slitting and heat sealing equipment comprises a frame, wherein a mounting block is arranged on the frame through a first power mechanism, the first power mechanism drives the mounting block to vertically move, a first heat sealing knife and a second heat sealing knife are arranged at the lower end of the mounting block at intervals in parallel, the mounting block is of a U-shaped structure with a downward opening, a through groove communicated with the U-shaped groove is formed in the upper end face of the mounting block, a heat cutter is movably arranged in the through groove up and down, a second power mechanism for driving the heat cutter to move up and down is arranged on the mounting block, the mounting block is provided with two mounting arms, and the heat sealing knives are arranged on each mounting arm; each mounting arm is provided with a mounting groove, scraping plates are rotatably mounted on two vertical groove walls of each mounting groove through rotating shafts, and each rotating shaft is provided with a torsion spring; the hot cutter comprises a cutter head and a cutter head mounting plate, wherein the cutter head comprises a cutter tip and wedge-shaped surfaces at two sides, and the two scraping plates are oppositely arranged and are respectively corresponding to the corresponding wedge-shaped surfaces to scrape foreign matters on the corresponding wedge-shaped surfaces in the up-and-down movement process of the hot cutter.

Grooves are formed in the two plate surfaces of the cutter head mounting plate in one-to-one correspondence with the scrapers, and the extending end parts of the scrapers are located in the corresponding grooves when the cutter heads of the hot cutters are in contact with the thin films for cutting.

Each groove is an open groove with an arc groove bottom, and the side surface of the end part of the scraping plate positioned in the corresponding groove is always contacted with the arc groove bottom of the arc groove.

Each scraping plate is an arc-shaped plate.

Each mounting groove is a through groove which penetrates through the corresponding mounting arm, and the lower groove wall of each mounting groove is an inclined surface.

The outer side surface of each mounting arm is provided with a receiving groove.

The cutter head mounting plate of the hot cutter comprises a front side face, a rear side face, a left plate face and a right plate face, and the front side face and the rear side face of the cutter head mounting plate are respectively matched with the front side wall and the rear side wall of the through groove in an up-and-down guiding and moving mode.

The equipment also comprises a base plate positioned below the heat sealing knives, and the base plate is provided with silica gel cushion blocks corresponding to the heat sealing knives.

The invention has the beneficial effects that: the heat-sealing knife performs heat-sealing on the lower double-layer film, and the heat-cutting knife performs heat-cutting and heat-seals the double-layer film at the cut. In the up-and-down movement process of the hot cutter, under the action of the torsion spring, each scraper can be contacted with the corresponding wedge-shaped surface of the cutter head to scrape off the foreign matters attached on the cutter head, so that the cutter head is ensured to be clean when the hot cutter cuts downwards each time, no foreign matters exist, and the cutting quality after each time of cutting is ensured. Compared with the prior art, the hot air blowing mode is not adopted, the scheme of the invention utilizes the torsion spring to realize that the scraping plate automatically scrapes the foreign matters on the tool bit, is easy to control, does not have adverse effect on the film below, and is convenient to use.

Further, the scraping foreign matters are prevented from falling down on the film, grooves are formed in two plate surfaces of the mounting plate, the extending end parts of the scraping plates are located in the corresponding grooves when the cutter heads of the hot cutters are in contact with the film for cutting, and the foreign matters located in the grooves cannot fall onto the film below.

Drawings

FIG. 1 is a schematic view of one embodiment of a film slitting and heat sealing apparatus of the present invention;

FIG. 2 is a schematic diagram of a second embodiment of a film slitting and heat sealing apparatus according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of the structure between the hot knife and the blade when the hot knife is not descending;

FIG. 5 is a schematic view of the structure between the blade and the groove when the head of the hot cutter is in contact with the film;

fig. 6 is a schematic view of the structure between the scraper and the groove in the process of ascending the cutting position of the hot knife.

Detailed Description

An embodiment of a film slitting and heat-sealing device of the invention is shown in fig. 1-6, and comprises a frame (not shown in the drawings), wherein a mounting block 1 is arranged on the frame through a first power mechanism, the first power mechanism drives the mounting block to vertically move, the first power mechanism comprises a first oil cylinder (not shown in the drawings), the mounting block 1 is connected with a connecting plate 3 through a connecting rod 2, and piston rods 6 of the first oil cylinder are connected with the connecting plate, and the number of the connecting rods in the embodiment is 4. The lower extreme parallel interval of installation piece is provided with heat-seal knife 5, and the installation piece is the U-shaped structure of opening decurrent, and the installation piece has two installation arms 4, all is provided with above-mentioned heat-seal knife 5 on each installation arm, and the heat-seal knife includes first heat-seal knife and second heat-seal knife. The upper end face of the mounting block is provided with a through groove communicated with the U-shaped groove, a hot cutter 7 is movably arranged in the through groove up and down, and the mounting block is provided with a second power mechanism for driving the hot cutter to move up and down. Specifically, the tool bit mounting plate of hot cutter includes leading flank, trailing flank, left face and right face, and leading flank and the trailing flank of tool bit mounting plate are respectively with leading sidewall and the back lateral wall upper and lower direction removal cooperation of leading groove. The second power mechanism adopts a second oil cylinder 8, and a piston rod 9 of the second oil cylinder is connected with the upper end of the hot cutter 7. In the prior art, the heat sealing knife and the heat cutting knife are not described in detail in the embodiment, and simply speaking, the heating wires are arranged inside the heat sealing knife and the heat cutting knife and controlled by the external temperature control device.

In this embodiment, the front, rear, left and right directions are defined by the directions shown in fig. 1, the directions perpendicular to the paper surface are outwards and inwards, and the definition of the directions is only for more convenience in describing the structure, and does not limit the protection scope thereof.

Each mounting arm is provided with a mounting groove 10, scraping plates 18 are rotatably mounted on two vertical groove walls of each mounting groove through rotating shafts, and torsion springs are arranged on each rotating shaft. The hot cutter comprises a cutter head 17 and a cutter head mounting plate 16, wherein the cutter head comprises a cutter tip and wedge-shaped surfaces at two sides, and two scraping plates are oppositely arranged and are respectively corresponding to the corresponding wedge-shaped surfaces to scrape foreign matters on the corresponding wedge-shaped surfaces in the up-and-down movement process of the hot cutter. Grooves 11 are formed in the two plate surfaces of the cutter head mounting plate in one-to-one correspondence with the scrapers, and the extending end parts of the scrapers are located in the corresponding grooves when the cutter heads of the hot cutters contact and cut the film. The length of recess extends along fore-and-aft direction to the length of recess is less than the length of tool bit installation piece along fore-and-aft direction, and this kind of benefit can guarantee that the tool bit mounting panel has higher intensity, reduces the reduction of recess to tool bit mounting panel intensity.

Each groove is an open groove with an arc groove bottom, and the side face of the end part of the scraping plate positioned in the corresponding groove is always contacted with the arc groove bottom of the arc groove, so that the scraped foreign matters are prevented from falling. Each scraping plate is an arc-shaped plate. Each mounting groove 10 is a through groove penetrating through the corresponding mounting arm, the lower groove wall 20 of each mounting groove is an inclined surface, and the outer side surface of each mounting arm is provided with a receiving groove 12. In the upward process of the hot cutter, the lower groove edge of the groove can drive the scraping plate upwards, the scraping plate inclines upwards, and foreign matters on the scraping plate drop onto the inclined plane of the mounting groove and roll into the receiving groove. The device also comprises a base plate 13 positioned below the heat-seal knives, a silica gel cushion block 14 corresponding to each heat-seal knife is arranged on the base plate, and a knife groove 15 corresponding to the knife head of the heat-seal knife is formed between the two silica gel cushion blocks.

The working process of the film slitting and heat sealing equipment provided by the invention is as follows: when the lower heat sealing and slitting are needed, the first oil cylinder drives the mounting block and the hot cutter to integrally descend, the heat sealing cutter on the mounting block is contacted with the film below for heat sealing, the position of the hot cutter is not moved, the position relationship between the two scraping plates and the hot cutter is shown in fig. 4, and the end parts of the two scraping plates are contacted with the middle lower parts of the two wedge-shaped faces of the cutter head or the distance between the end parts of the two scraping plates and the middle lower parts of the two wedge-shaped faces of the cutter head is small, for example, within 2 mm. Then the second oil cylinder drives the hot cutter to move downwards, the cutter head extrudes a scraper downwards, the scraper begins to scrape the foreign matters on the wedge-shaped surface, in the descending process of the hot cutter, the end part of the scraper contacts with the wedge-shaped surface of the cutter head, then contacts with the surface of the cutter head mounting plate, and when the cutter head moves downwards to contact with the film, the end part of each scraper enters the groove of the cutter head mounting plate and contacts with the arc-shaped groove bottom of the groove, as shown in fig. 5. After cutting, the second oil cylinder is provided with a heat cutting head, the groove edge of the groove drives the scraping plate upwards, so that the scraping plate is inclined upwards, and as shown in fig. 6, foreign matters in the groove fall into the groove through the scraping plate and roll into the receiving groove. The hot cutter continues to move upwards, and the scraper blade contacts with the face of tool bit mounting panel, scrapes the foreign matter with the corresponding wedge face contact of tool bit afterwards, and the foreign matter that this process scraped drops down to the film on, and the foreign matter volume that drops is few, does not influence the heat-seal and cuts, because can not once scrape the foreign matter and take away, for example the foreign matter is little, hot cutter head upward velocity is fast. The cutter head is high in temperature and is in a paste shape at the moment, so that the cutter head is required to scrape the foreign matters again by scraping when going down, and the existence of the foreign matters on the cutter head is reduced when the cutter head is cut each time.

In other embodiments of the present invention, the first cylinder may be replaced by a cylinder or an electric pushrod; the second oil cylinder can also be replaced by an air cylinder or an electric push rod; the number of the connecting rods can be adjusted according to actual needs, for example, two connecting rods; the blade may also be a flat plate.

Claims

1. The utility model provides a sealing equipment is cut to film, includes the frame, is provided with the installation piece through a power unit in the frame, and a power unit drives the vertical removal of installation piece, and the lower extreme parallel interval of installation piece is provided with first heat-seal knife and second heat-seal knife, its characterized in that: the mounting block is of a U-shaped structure with a downward opening, a through groove communicated with the U-shaped groove is formed in the upper end face of the mounting block, a hot cutter is movably arranged in the through groove up and down, a second power mechanism for driving the hot cutter to move up and down is arranged on the mounting block, the mounting block is provided with two mounting arms, and the hot cutter is arranged on each mounting arm; each mounting arm is provided with a mounting groove, scraping plates are rotatably mounted on two vertical groove walls of each mounting groove through rotating shafts, and each rotating shaft is provided with a torsion spring; the hot cutter comprises a cutter head and a cutter head mounting plate, wherein the cutter head comprises a cutter tip and wedge-shaped surfaces at two sides, and two scraping plates are oppositely arranged and are respectively corresponding to the corresponding wedge-shaped surfaces to scrape foreign matters on the corresponding wedge-shaped surfaces in the up-and-down movement process of the hot cutter; grooves are formed in two plate surfaces of the cutter head mounting plate in one-to-one correspondence with the scrapers, and the extending end parts of the scrapers are positioned in the corresponding grooves when the cutter heads of the hot cutters are contacted with the film for cutting; each groove is an open groove with an arc groove bottom, and the side surface of the end part of the scraping plate positioned in the corresponding groove is always contacted with the arc groove bottom of the arc groove.

2. The film slitting and heat sealing apparatus according to claim 1, wherein: each scraping plate is an arc-shaped plate.

3. The film slitting and heat sealing apparatus according to claim 2, wherein: each mounting groove is a through groove which penetrates through the corresponding mounting arm, and the lower groove wall of each mounting groove is an inclined surface.

4. A film slitting and heat sealing apparatus according to claim 3, wherein: the outer side surface of each mounting arm is provided with a receiving groove.

5. The film slitting and heat sealing apparatus according to claim 1, wherein: the cutter head mounting plate of the hot cutter comprises a front side face, a rear side face, a left plate face and a right plate face, and the front side face and the rear side face of the cutter head mounting plate are respectively matched with the front side wall and the rear side wall of the through groove in an up-and-down guiding and moving mode.

6. The film slitting and heat sealing apparatus according to claim 1, wherein: the equipment also comprises a base plate positioned below the heat sealing knives, and the base plate is provided with silica gel cushion blocks corresponding to the heat sealing knives.