JPH04339736A - Sealing device for filling and packing - Google Patents

Abstract

PURPOSE:To form simultaneously a cutting means over a whole width of a sealing part and a cutting means over a part of the width. CONSTITUTION:In a process where a cylinder made of a heat welding resin is supplied in the longitudinal direction, the cylinder is filled with its content and sealed in the width direction. For this filling packing, a temporary sealing means 10 comprising of a curved surface pressing part 11 which protrudes in the width direction of the cylinder, an elastic pressing part 12 which is provided in the width direction of the cylinder and a heater to attach lightly a sealing part of the cylinder already contacted by these pressing parts by a prescribed width is provided above a supply path of the cylinder running from upward to downward, so that a part of the cylinder is attached in the width direction. Further a main sealing means 20 is provided at a position separated below from the temporary sealing means 10 by a length of a bag. In addition, a whole width heating part to heat over a whole width of the sealing part and a partial width heating part are positioned adjacently in the cylinder supplying direction.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for sealing a cylindrical body while eliminating liquid present in the sealing part in a packaging machine for filling contents into a cylindrical body, and for forming a separating means in the sealing part. It is something.

0002

BACKGROUND OF THE INVENTION Mechanical devices for sealing and filling continuously fed cylinders with food or other contents are known. This type of device is usually provided with one thermal welding means and one separating means, and both means are placed at the same location (Utility Model Publication No. 58).
-40009) or separated from each other.

By the way, when filling and packaging contents containing liquid using the above-mentioned apparatus, in the usual method, the liquid remains inside due to capillary action, and if this is left and heat sealing is performed using multiple lines, A disadvantage was that liquid remained between the sealed wires and oozed out during cutting. This leakage not only stains the packaged product and the cutter, but also causes problems such as premature deterioration of the cutter's sharpness.

[0004]Furthermore, in this type of filled and packaged products, in order to open the package and pour out the liquid inside, the seal part is machined with perforations for separation. If there was residual liquid in the part, the liquid would seep out from the tear line, significantly degrading the packaging quality.

[0005] Therefore, the inventor of the present invention first proposed a method that, when filling and packaging contents containing liquid, can effectively remove the liquid from the sealing part and do not cause the foaming phenomenon.
We have developed a liquid exclusion sealing method and sealing mechanism for filled packaging that can achieve high-quality sealing, and have already filed an application.

[0006]

According to the sealing method and sealing mechanism of the invention, ideal sealing can be achieved with virtually no leakage of liquid. Therefore, the present invention makes use of the above-mentioned invention to simultaneously form a separating means over the entire width of the filled packaged product and a separating means only for the partially heated part, thereby separating the filled packaged products individually and at the same time removing the liquid. The purpose is to enable the formation of a cutting section necessary for pouring out, etc.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention flattens a part of the cylindrical body relatively to the top of the supply path of the cylindrical body from top to bottom, and tightly adheres it in the width direction. In order to achieve elasticity, a curved pressure section is provided to be able to approach and separate from both sides of the cylindrical body and protrude in the width direction of the cylindrical body, and the curved pressure section placed opposite the curved surface pressurizes the elastic body. A heater that deforms and heats the elastic pressure part provided in the width direction of the cylindrical body and the sealed part of the cylindrical body that is in close contact with a predetermined width by both pressure parts at a temperature lower than the set temperature to weakly bond the body. The temporary sealing means is provided at a position below the temporary sealing means and separated by the length of the bag so as to be able to come into contact with and separate from the temporary sealing part, and when in contact, the temporary sealing part is heated to a set temperature. The present sealing means is equipped with a heater that heats the sealed portion of the cylindrical body, and the heater has a full-width heating portion that heats the sealed portion of the cylindrical body over the entire width, and a partial heating portion that heats the sealed portion while leaving an unsealed portion. are arranged adjacent to each other in the direction in which the cylindrical body is supplied, and furthermore, a technical measure is taken to provide a cutting means for forming a separation part in a range corresponding to the heating length of each heating part.

[0008] The contents to be filled into the cylindrical body according to the present invention include those that are purely liquid, those that are a mixture of liquid and solid, those that are in a fluid state, or those that have the property of causing liquid to ooze out from solids. This applies to items where the seal part is likely to be affected by liquid, such as items.

[0009]

Embodiments will be explained below with reference to the drawings. As shown in Figs. 1 and 2, the filling and packaging machine has a roll R of film or sheet made of heat-fusible resin built into the machine body 1, which is pulled out to the upper part of the front of the machine body, and is pulled out to the upper part of the front of the machine body, and the roll R of film or sheet made of heat-fusible resin is built into the machine body 1. It has the function of forming a cylindrical body R' by almost inverting it, wrapping it around the cylindrical guide body 3 which also serves as a means for filling the contents, and welding the combined both ends with the heat sealing part 4. , along the path for supplying the cylindrical body R' from the upper front to the lower part, the cylindrical body R' is sealed at regular intervals while removing the liquid inside the cylindrical body N, and the packaged product R is sealed. ”.

Next, a liquid exclusion sealing method in such a filling and packaging machine will be explained. The steps are shown in FIGS. 3 to 6, where A is the flattening process, B is the liquid removal process, C is the temporary sealing process, D is the main sealing process, and E is the cutting process.

In the flattening step A, when the cylindrical body R' moves downward along its supply path, at the normal stop position of the packaging machine shown in FIG. Grasp it and apply pressure. As a result, the two surfaces of the cylindrical body R' are brought together with the liquid content N remaining in the form of a thin film, and the cylindrical body R' is kept flat by being pushed by atmospheric pressure. The means for flattening include pressing both sides of the cylindrical body R', being able to approach and separate from the cylindrical body,
A material that satisfies the following two conditions is used, but it is also ideal if it is in the form of a rotating roll, as it will not cause scratches and the feeding action will be smooth.

The liquid removal process B is a process in which the sealed portion of the flattened cylindrical body R' is further pressurized to reduce the liquid remaining inside as much as possible and to bring the resin on both sides into close contact. Figure 4). To remove the liquid, it is not enough to simply concentrate pressure in the width direction of the cylindrical body R' with a strong pressing force; it is necessary to provide a place for the liquid to escape. This is in the present invention,
This is the reason why the liquid is pushed upward and downward around the pressurizing part. To carry out this pushing method, it is necessary to use at least one member having a cylindrical curved surface. Contact between a plane and an arc is one example that satisfies the above conditions, but according to this combination, the width of the contact surface changes when the plane side is made of an elastic material and the elasticity and pressing force are changed. , Now you can adjust or set the width of the seal. The width of this contact surface needs to be wide enough to allow at least two cutouts to be inserted in parallel at regular intervals.

[0013] In the temporary sealing step C, the portion of the contact surface from which the liquid has been drained to a predetermined width is heated to a temperature close to the minimum temperature at which the resin constituting the cylindrical body can be welded. Although a solid seal or a line seal may be used, it is preferable to use a solid seal in this step in relation to the main seal described later (see FIG. 12). Since the process is carried out at a low temperature, even if a very small amount of liquid remains between the resins, it will not foam, and the required sealing strength can be easily obtained even at low temperatures. The filling of the content N containing liquid into the cylindrical body is performed after this temporary sealing is completed.

[0014] Furthermore, it is best to perform temporary sealing at the same time as the above-mentioned liquid removal, and since the sealed part from which liquid has been removed is heated as low as possible, no abnormality will be caused to the sealed part. Good results can be obtained.

[0015] The main sealing process D is a process in which the temporarily sealed portion is heated and welded at a regular temperature, and the interval between this process and the previous process C is equal to the bag length (height of the packaged product R''), that is, The lower seal is separated by the length of the upper seal.The cylindrical body R' is moved by the length from the temporary seal to the permanent seal position, but both sealing operations can be performed simultaneously at each position ( Fig. 4).Thus, the cylindrical body R'
is intermittently transferred downward along the length of the packaged product R''.The main seal is preferably a line seal, as opposed to the solid seal of the temporary seal, which increases the seal strength and improves the appearance.

[0016] In the cutting process E, the upper main seal part of the packaged product R'' whose lower and upper parts are permanently sealed is separated in the width direction to form a cutting part for making one product, and a cutting part for opening the package. This is the process of forming a part.When performing a line seal with this seal, cutting is performed on the solid seal part.For this reason, a clean cut surface is obtained without being affected by heat, and no liquid bleeds. .

The cutting process can also proceed simultaneously with the main sealing process (FIG. 4), and the packaged products R'' are separated one by one (see FIGS. 5 and 14).

[0018] At the same time as the cutting process E is completed, the next temporary sealing process C on the upper part can also be completed (Figs. 4 and 5).
), the cylindrical body above the temporary seal is filled with the following contents, and the load is therefore applied to the temporary seal. Therefore, if we take measures to bear part of this load (Fig. 5F), we can protect the temporary seal part, which is unstable and difficult to cool down, from the increased internal pressure caused by flattening, especially when filled with high-temperature liquid. The content can be stabilized.

In each figure, reference numerals 5 and 6 denote a pair of squeezing rolls located above the supply path and provided on both sides of the cylindrical body R' so as to be able to contact and press the cylindrical body R'. Responsible for process A, which involves squeezing and flattening the material from the front and back.

Reference numerals 7 and 8 denote a pair of bag regulating plates which are placed between the flattening step A and the temporary sealing step B described later and perform the measure F, which prevents the cylindrical body from being filled when the contents are filled into the cylindrical body. Body R
It is provided so as to be able to approach and separate from the bearing from both the front and rear sides so as to bear part of the load, and has a support surface that slopes outward from the top. 9 indicates a capacitance sensor for liquid level monitoring.

Reference numeral 10 denotes a temporary sealing means, which is located in the middle of the supply path and includes a curved pressure member 11 having a cylindrical curved surface protruding from the cylindrical body R', and an elastic pressure member disposed opposite to the curved pressure member 11. A heater 13 for temporary sealing is provided on the side of the curved surface pressurizing part 11 for heating and sealing the curved surface pressurizing part 12 at a temperature close to the minimum temperature that allows welding of the cylindrical body resin. The curved pressure section 11 has a maximum vertical width that is the same as the actual seal, allowing for a temporary seal, and a length that is longer than the full width of the cylindrical body R', and the elastic pressure section 12 is slightly wider than that. , and is made of an elastic material such as silicone rubber in order to be elastically deformed by the pressing force of the curved surface pressing section 11.

The form of both pressurizing parts 11 and 12 is shown in FIG. 9, but in addition to this combination of a flat surface and a convex surface, the convex surfaces may be brought into contact with each other, in which case the pressure applied to the cylindrical body R' is The pressure, ie the liquid displacement force, becomes stronger. Note that the pressurized elastic pressure section 12 is recessed following the curved shape of the curved surface pressure section 11 . Reference numeral 14 denotes a sealing base to which a curved pressure member 11 is attached, and 15 a sealing member to which an elastic pressure member 12 is attached, and the sealing pressure can be changed by an adjustment spring 16. Reference numerals 17 and 18 are support rods for both pressurizing parts, which are operated by a cylinder mechanism for contacting and separating from the cylindrical body R''. Reference numeral 19 indicates a temporary seal part cover.

As mentioned above, this sealing surface performs solid sealing and consists of a full width heated part 11a, an unsealed part 11b and a partially heated part 11c, and no temporary seal is made in the unsealed part 11b (FIG. 12). .

Reference numeral 20 denotes the present sealing means, which is located at the lower part of the supply path and is attached to a lifting frame 21 in order to change its position depending on the length of the bag as a product. A sealing stand 24 is equipped with a line sealing part 22 and a heater 23 which are heated in order to perform a linear seal at a temperature.
A receiving seal stand 26 having an elastic receiving portion 25 is provided at a position facing this across the supply path.

The line seal section 22 heats the temporarily sealed section of the cylindrical body R', leaving a full width heating section 22a for heating the entire width of the cylindrical body R' and an unsealed section 22b. (FIG. 13), and both heating portions 22a and 22c are provided adjacent to and in contact with each other in the cylindrical body supply direction.

The positions and shapes of the unsealed portions 11b and 22b are the same for the temporarily sealed portion, but in addition to one end,
It can be provided in any shape, such as in the center. In either case, the sides of the cylindrical body must be surrounded by a partial seal portion and a full-width seal portion, and must also communicate with the cylindrical body.

[0027] On the side of the receiving part 25, a vertically parallel slit is provided, through which a slit made of a serrated cutter or the like is inserted.
The pair of cutting means 27a, 27b is a mating slit 27s,
It is installed so that it appears and disappears toward 27t. One of these cutting means 27a and 27b, 27a, is provided so as to overlap the full-width heating portion 22a of the line seal portion 22, and the other 27b is provided so as to overlap the partial heating portion 22c. Further, it is desirable that the full-width separation portion 53 by the cutting means 27a on the full-width side enables immediate separation, but the partial separation portion 54 is preferably separated when force is applied, like a perforation.

The elevating frame 21 has front and rear bases 21a.
, 21b and left and right support rods 21c, 21d. 28 is an adjustment spring that acts on the receiving seal stand 26, 29a, 2
Reference numeral 9b denotes a cylinder mechanism for operating the main seal, which is provided on the front of the frame and on the body side, respectively. 30 is a blower that injects air to the main seal portion, and 31 is a cooling air reflection plate.

Reference numeral 32 denotes a female thread cylinder fixed to one side of the lifting frame 21, which has nuts 33 on the top and bottom, and is screwed into a male thread rod 34 attached to the front side of the machine body.
The frame moves up and down by rotating 4. 35 is a gear set for driving the male screw rod, and 36 is a drive shaft which is operated by attaching a handle 37. 38 is an engagement groove provided at the upper end of the male threaded rod 34, 39 is a stop shaft that engages with it and fixes the male threaded rod 34, 40 is a pointer provided on the female threaded tube 32, and 41 is the indicator, which is attached to the fuselage side. It is set in. 42 is frame 21
A guide member 44 supports the other side 43, and a cover 44 surrounds the entire portion of the lifting frame 21, and has an opening 45 in the supply path portion. In FIG. 11, 46 and 47 are support plates for the receiving seal stand 26 and the cutting means 27, and the cylinder shaft 48a
The heater side support plate 49 is operated by its cylinder shaft 48b. Further, 50 indicates a control panel provided on the side of the fuselage.

FIG. 3 shows the cylindrical body R' pulled out from the roll R and formed into a cylindrical shape, with the ladder rolls 5 and 6 closed and stopped.
Start from the state of

[0031] The tip of the cylindrical body is preliminarily sealed with at least the temporary seal part 1.
0, and the curved surface pressurizing section 11 and elastic pressurizing section 12 close in response to this, pressurizing both surfaces and bringing the resin into close contact.

At this time, if the content N is contained, the liquid is pushed upward and downward from the center of the pressurizing part according to the pressurizing force from the curved pressurizing part 11 to the elastic pressurizing part 12, and the resin is separated from the resin at a constant rate. Close contact with almost no liquid in the seal width area,
At the same time, the heater 13 generates heat and thermally welds the entire surface of this contact area at a temperature lower than the set temperature (see Figures 4 and 14).
.

In FIG. 14, 51 is a temporary sealing surface, which includes a full-width sealed portion 51a, a partially sealed portion 51c, and an unsealed portion 5.
1b. Almost at the same time as the temporary seal, the bag regulating plates 7 and 8 approach both sides of the cylindrical body R', and the ironing rolls 5 and 6 open again and the liquid-containing contents begin to flow in.
Subsequently, both sealing means 10, 20 open back and forth (FIG. 5).

The liquid that has flowed into the bag regulating plates 7 on both sides of the cylindrical body;
By adjusting the support position and the height position of the squeezing rolls 5 and 6, the amount of content to be filled can be adjusted. This adjustment only needs to be done once for the same product. As described above, the regulating plates 7 and 8 protect the temporarily sealed portion (bottom) from the internal pressure and hot contents generated by the closing operation of the squeezing roll when it is in an unstable state immediately after the temporary sealing.

Next, the straining rolls 5 and 6 close and begin to feed the cylindrical body R', and at the same time the bag regulating plates 7 and 8 open (Fig. 6
), the cylindrical body R' stops at the position where it has been fed by the length of the bag (FIG. 3). At this time, the part that has already been temporarily sealed moves to the main sealing process D, and the new unsealed part of the cylindrical body R' is in the temporary sealing process C. The part where the temporary seal has been made with a certain width is sandwiched from the front and back by the line seal part 22 and the elastic receiving part 25 of the main sealing means 20, and the main seal heater 2
Thermal welding due to the heat generated in step 3 is performed linearly in both the full-width heating section 22a and the partial heating section 22c. Reference numeral 52 denotes a main sealing surface, which is composed of a full-width sealed portion 52a, a partially sealed portion 52c, and an unsealed portion 52b. 53 is a complete separation line, 5
4 indicates a planned separation line such as a perforation. The above-described steps are then repeated.

[0036] The filling and packaging machine can be operated in automatic operation or continuous operation. In automatic operation, the liquid waiting operation is in which the top surface of the contents N reaches the height of the sensor 9 and waits, and in continuous operation, In this case, when the supply of contents N is sufficient, continuous packaging is performed while controlling the contents according to the packaging capacity.

[0037]

Effects of the Invention Since the present invention is constructed and operates as described above, when filling a cylindrical body with liquid-containing contents and packaging it, the liquid can be effectively expelled from the sealing part, Temporary sealing is performed at a temperature lower than the set temperature on the part from which the liquid has been sufficiently removed, so that even if a sticky seal is applied to the temporarily sealed part, no bubbling phenomenon will occur.

[0038] The main sealing is performed on the part that has been temporarily sealed in this way, and at this stage, thermal welding can be carried out at the set temperature without anxiety, and the strength of the seal is perfect. Such two-step sealing makes it possible, for example, to perform a temporary seal with a solid seal and a permanent seal with a line seal, which improves the aesthetic appearance of the sealed area, but depending on the conditions, high-temperature sealing may cause slight foaming. It doesn't necessarily mean that there is no such thing. However, according to the present invention, the entire width of the separation part 51a provided in the temporary seal between the seal lines can be cut, so even if such a situation were to occur, the cut surface would be clean and there would be no leakage of liquid. There is no fear that the seal will come out, and the unsealed part B can be separated by the partial separation part 51b provided in the partial heating part 22c, so opening is very easy.

Therefore, according to the present invention, filling and packaging of liquid-containing contents can be performed cleanly and hygienically, the cutting means is kept clean and sharp, and the cutting means that extends over the entire width of the cylindrical body is provided. A separating means for only the partially heated part can be formed on the filled and packaged product to facilitate division into individual products and opening during use. Since the unsealed part is opened using the partial separation part as a guide, a reliable and clean opening can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view of a filling and packaging machine.

FIG. 2 is a side view of the same as above.

FIG. 3 is a side view illustrating a sealing process.

FIG. 4 is a side view illustrating a sealing process.

FIG. 5 is a side view illustrating a sealing process.

FIG. 6 is a side view illustrating a sealing process.

FIG. 7 is a front view of the seal mechanism.

FIG. 8 is a partially enlarged cutaway side view of the same as above.

FIG. 9 is a side view of the temporary sealing means.

FIG. 10 is a cutaway side view of the seal mechanism.

FIG. 11 is a horizontal sectional view.

FIG. 12 is a front view of the heater of the temporary sealing means.

FIG. 13 is a front view of the heater of the present sealing means.

FIG. 14 is an explanatory diagram showing a temporary seal added to a cylindrical body, a permanent seal, and a state of separation.

Claims (4)

[Claims] Claim 1: In filling packaging, in which a cylindrical body made of heat-fusible resin is continuously supplied in the longitudinal direction, the contents are filled into the cylindrical body, and the top and bottom of the cylindrical body are sealed in the width direction. Then, in order to flatten a part of the cylindrical body relatively to the top of the supply path of the cylindrical body from top to bottom and bring it into close contact in the width direction,
A curved pressing section that is provided so as to be able to approach and separate from both sides of the cylindrical body and protrudes in the width direction of the cylindrical body, and a cylinder that is elastically deformed by the pressing force of the curved pressing section that is disposed opposite to the curved pressing section. A tent consisting of an elastic pressurizing part provided in the width direction of the cylindrical body, and a heater that heats the sealed part of the cylindrical body, which is in close contact with a predetermined width by both pressurizing parts, at a temperature lower than the set temperature to weakly bond the cylindrical body. A heater that is provided with a sealing means, is provided at a position below the temporary sealing means and separated by the length of the bag, and is movable toward and away from the temporary sealing portion, and heats the temporary sealing portion at a set temperature when in contact. The heater includes a full-width heating section that heats the sealed portion of the cylindrical body over the entire width, and a partial heating section that heats the sealed portion while leaving an unsealed portion of the cylindrical body. What is claimed is: 1. A sealing device for filling and packaging, characterized in that the sealing device is made up of adjacent heating parts in the supply direction, and is further provided with a cutting means for forming a separation part in a range corresponding to the heating length of each heating part. 2. The temporary sealing means includes a curved pressing section consisting of a cylindrical curved surface along the width direction of the cylindrical body, and a heat-resistant elastic material such as silicone rubber that deforms under pressure upon contact with the pressing section. 2. The sealing device for filling and packaging according to claim 1, further comprising an elastic pressurizing section consisting of: 3. A squeezing roll for pressurizing and flattening the cylindrical body from both sides is disposed upstream of the temporary sealing means, and contacts both sides when the cylindrical body is filled with liquid-containing contents, 2. A sealing device for filling and packaging according to claim 1, wherein a pair of bag regulating plates having upper portions slanted outward are provided between said roll and temporary sealing means to support a load. 4. A full-width heating section that operates on the cylindrical body at the same time as the overheated welding by the heater and separates the cylindrical body one by one, and a cutting section formed in a range other than the unsealed area. 2. A sealing device for filling and packaging according to claim 1, wherein a partial heating section for heating is attached to the main sealing means.