Thermoforming apparatus, and heat insulation sheet

Abstract

To provide a thermoforming apparatus capable of achieving energy saving in a heating unit.SOLUTION: In a thermoforming apparatus 100 comprising: a heating unit 150 having upper heating means 151 for heating a resin sheet S from the upper side, and lower heating means 152 for heating the resin sheet S from the lower side; a formation unit 200 for forming the resin sheet S; and a conveying mechanism 155 for conveying the resin sheet S, heat insulation sheets (upper heat insulation sheets 161 and lower heat insulation sheets 171) are detachably fixed on outer side surfaces of the upper heating means 151 and the lower heating means 152.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an energy saving technology for a thermoforming device, and more specifically, to a technology for reducing heater output by using a heat insulating material in a heating section. [Background technology]

[0002] Many thermoforming devices are configured to have a heating process for heating a resin sheet and a molding process for molding the heated resin sheet, and in the case of a thermoforming device in which the heating process and the molding process are separate, the resin sheet must be heated at a constant high temperature in the heating process so that the resin sheet has an appropriate temperature for the molding process. In this heating process, heaters are used above and below the resin sheet, and the heaters require a large amount of electricity.

[0003] Patent Document 1 discloses a technique related to a heat insulating cover for injection or extrusion molding. Patent Document 2 discloses a technique related to a thermoforming device and a thermoforming method using a hot plate. The heat insulating cover as shown in Patent Document 1 can be provided by wrapping it around the outer periphery of the heating barrel, so that it is easy to provide the heat insulating cover. However, in the case of a thermoforming machine having a sheet conveying mechanism as shown in Patent Document 2 that unrolls and forms a long resin sheet, it is necessary to configure the machine so that a heat insulating material is provided above or below the heating part. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-314549 A [Patent Document 2] JP 2013-31930 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, as shown in Patent Document 2, this makes it difficult to prevent heat dissipation from the side of the heating part of the thermoforming device, and no measures have been taken so far. This is because the heating part of the thermoforming device is equipped with heaters arranged above and below, and the resin sheet needs to be heated while being transported between them, but in this process, heat dissipates from both sides of the resin sheet. This part is equipped with a sheet feed mechanism, etc., making it difficult to install heat insulating material. In addition, there are protrusions on the side to connect movable water jackets, wiring, piping, etc., which also makes it difficult to install heat insulating material.

[0006] However, due to recent circumstances, energy-saving performance is also required for thermoforming equipment, and there is a strong desire to reduce power consumption. In particular, the heating part constantly outputs high temperatures, so a large amount of electricity is required during production, and there was an issue of energy loss.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a thermoforming device capable of realizing energy saving in the heating section. [Means for solving the problem]

[0008] In order to achieve the above object, a thermoforming apparatus according to one aspect of the present invention has the following features.

[0009] (1) A thermoforming device including a heating section having an upper heating means for heating a resin sheet from above and a lower heating means for heating a resin sheet from below, a forming section for forming the resin sheet, and a conveying mechanism for conveying the resin sheet, a heat insulating sheet is detachably fixed to the outer surfaces of the upper heating means and the lower heating means; The heat insulating sheet is A thermal insulating fabric material is sewn to form the an upper heat insulating sheet that is arranged on an upper side of the resin sheet divided by a conveying surface of the resin sheet conveyed by the conveying mechanism and is fixed to an outer surface of the upper heating means; A lower heat insulating sheet is disposed under the heating section and fixed to an outer surface of the lower heating means, The upper heat insulating sheet and the lower heat insulating sheet each have a heating section zone in contact with an outer surface of the heating section and a supply section zone extending from the heating section zone to the conveying surface side, The lower heat insulating sheet is provided with column portions arranged in parallel at regular intervals and perpendicular to the feeding direction of the resin sheet, and aggregate is passed through the column portions; It is characterized by:

[0010] According to the aspect described in (1) above, heat dissipation from the heating portion can be suppressed, saving energy and improving the working environment. This is because the heat insulating sheet is provided on the outer surface of the heating portion of the thermoforming device, which suppresses heat dissipation from the side of the heating portion and from the portion that conveys the resin sheet, making it possible to reduce the power consumption used for heating. The heat insulating sheet is composed of an upper heat insulating sheet and a lower heat insulating sheet, and is composed of a heating portion zone and a supply portion zone. Therefore, the heating portion zone prevents heat dissipation from the outer surface of the heating portion (upper heating means and lower heating means), and the supply portion zone is provided with a conveying mechanism that conveys the resin sheet, thereby preventing heat that is likely to dissipate as much as possible. By adopting such a configuration, it is possible to contribute to energy saving in the thermoforming device.

[0011] (2) In the thermoforming apparatus according to (1), A heat-resistant magnet is used as a fixing means for the upper heat insulating sheet and the lower heat insulating sheet, A ferromagnetic metal is used on the outer surface of a housing used in the heating unit; is preferred.

[0012] According to the embodiment described in (2) above, the use of heat-resistant magnets makes it easy to remove the upper and lower insulation sheets. When performing maintenance on a thermoforming device, it is desirable for the insulation sheets to be easy to remove, and using a ferromagnetic metal for the housing and magnets to attach the upper and lower insulation sheets to make them easy to remove is highly effective in terms of improving maintainability.

[0013] (3) In the thermoforming apparatus according to (1) or (2), A shielding plate provided in the heating unit has a water channel formed therein and is provided with a pipe connected to the water channel; An electrical wiring is provided that is connected to the heating unit, The upper heat insulating sheet or the lower heat insulating sheet is provided with a slit portion for avoiding the piping and the electrical wiring; is preferred.

[0014] According to the aspect described in (3) above, the upper heat insulating sheet and the lower heat insulating sheet can be arranged while avoiding piping and electrical wiring.

[0015] In order to achieve the above object, a heat insulating sheet according to another aspect of the present invention has the following features.

[0016] (4) In a thermoforming machine having a heating section for heating a resin sheet, a heat insulating sheet is attached to a side of the heating section, The resin sheet has an upper heat insulating sheet arranged above the heating section and a lower heat insulating sheet arranged below the heating section, the upper heat insulating sheet being divided by a conveying surface of the resin sheet, The upper heat insulating sheet and the lower heat insulating sheet include: Silicone-coated glass cloth is used as the outer layer, and glass wool is used as the inner insulation. A heating section zone in contact with the thermoforming machine and a supply section zone extending from the heating section zone, The heating zone and the supply zone are partitioned by a sewing section sewn together with a heat-resistant thread, A notch is provided corresponding to the protrusion of the heating portion, The lower heat insulating sheet is provided with a bag portion into which a support pole is inserted at regular intervals; It is characterized by:

[0017] The aspect described in (4) above makes it possible to suppress heat radiation from the heating section of the thermoforming machine, thereby reducing power consumption and contributing to energy conservation. This is because the upper and lower insulation sheets that are divided on the conveying surface are used, so a configuration that covers the divided portion to the maximum extent can be selected, thereby reducing the area from which heat is radiated.

[0018] (5) In the heat insulating sheet according to (4), The upper and lower heat insulating sheets are fixed to the thermoforming machine using heat resistant magnets; is preferred.

[0019] According to the embodiment described in (5) above, the heat insulating sheet is fixed using a heat-resistant magnet, so that the heat insulating sheet can be easily attached and detached to the thermoforming device. The ability to easily attach and detach the heat insulating sheet during maintenance of the thermoforming device is beneficial because it leads to improved workability.

[0020] (6) In the heat insulating sheet attached to the side of the heater hot plate of the vacuum and pressure molding machine, It has a thickness of 5mm to 20mm, a hot plate zone and a supply zone, The supply zone is formed according to the shape of a protrusion such as a rail wiring of the vacuum / compressed air molding machine, The lower heat insulating sheet attached to the lower part of the heater hot plate has a function of inserting a support pillar to make it stand on its own. It is characterized by:

[0021] According to the embodiment described in (6) above, it is possible to suppress heat radiation from the side of the heater hot plate (heating part) of the vacuum / compression molding machine (thermoforming machine), which results in a reduction in the power consumption of the vacuum / compression molding machine and contributes to energy conservation. This is because the openings in the heating part can be reduced as much as possible by using the heat insulating sheet, which contributes to increasing the heating efficiency of the heating part.

[0022] (7) In the heat insulating sheet according to (6), The heat insulating sheet is provided with a slit so that the water jacket can be attached even if it is moved. is preferred.

[0023] According to the aspect described in (7) above, it is possible for the heat insulating sheet to function without impeding the movement of the water jacket.

[0024] (8) In the heat insulating sheet according to (6) or (7), A heat-resistant magnet is provided on the heat insulating sheet; is preferred.

[0025] According to the aspect described in (8) above, the heat insulating sheet can be easily attached and detached, and improvement in maintenance ease is expected. [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a schematic diagram of a thermoforming device according to the present embodiment. [Diagram 2] FIG. 2 is a schematic diagram showing a conveying mechanism portion of the thermoforming device according to the embodiment. [Diagram 3] FIG. 2 is a cross-sectional view of a heating unit in the present embodiment. [Figure 4] FIG. 2 is a cross-sectional view of a lower heat insulating sheet in the present embodiment. [Diagram 5] FIG. 2 is a perspective view of a heating unit in the present embodiment. [Figure 6] 6 is a perspective view showing a portion of the heating unit according to the present embodiment which is different from that shown in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] First, an outline of the configuration of a thermoforming apparatus 100 according to a first embodiment of the present invention will be described. Fig. 1 shows a schematic diagram of the thermoforming apparatus 100 of this embodiment. The thermoforming apparatus 100 includes an unwinding section 110, a heating section 150, a forming section 200, and an unloading section 250, and performs forming of a resin sheet S. The unwinding section 110 has a raw material roll 111 set therein and has a function of unwinding a long resin sheet S. The thermoforming apparatus 100 is also provided with a vacuum circuit including a vacuum generating device (not shown), and can perform vacuum and pressure forming of the resin sheet S.

[0028] The heating section 150 is provided with an upper heating means 151 and a lower heating means 152 to heat the resin sheet S. The molding section 200 is provided with an upper mold 201 and a lower mold 202 to thermoform the resin sheet S. The removal section 250 is provided with a trimming device 251 to trim the resin sheet S, enabling the molded product M to be removed.

[0029] The resin sheet S is a long sheet material unwound from a raw material roll 111, and is made of a thermoplastic resin. According to the JIS standard, a film is defined as a plastic membrane having a thickness of less than 250 μm, and anything thicker than that is defined as a sheet material, but for convenience, the term sheet material is used in this embodiment, and film materials may be used in the present invention as needed.

[0030] FIG. 2 is a schematic diagram showing the conveying mechanism of the thermoforming device. FIG. 3 is a cross-sectional view of the heating section 150. It corresponds to the cross section AA in FIG. 1. The conveying mechanism 155 has a belt 155c wound around a first pulley 155a and a second pulley 155b, and a gripping section 155d shown in FIG. 3. A motor (not shown) is connected to the first pulley 155a or the second pulley 155b to drive the belt 155c. The conveying mechanism 155 is arranged on both sides of the resin sheet S, that is, in two rows parallel to the thermoforming device 100, and the gripping sections 155d fixed to the belt 155c grip both ends of the resin sheet S as shown in FIG. 3 to convey the resin sheet S.

[0031] In addition, cooling means 157 is provided between the upper heating means 151 and the lower heating means 152. The cooling means 157 is a movable water jacket, and is configured to circulate cooling water through piping (not shown). The cooling means 157 are disposed above and below the resin sheet S. In other words, they are disposed between the upper heating means 151 and the resin sheet S, and between the lower heating means 152 and the resin sheet S, so as to block heat from the upper heating means 151 and the lower heating means 152 to the resin sheet S. The cooling means 157 is movable back and forth in the traveling direction of the thermoforming apparatus 100.

[0032] Next, the configuration of the heating section 150 will be described. In the heating section 150, a plurality of heaters 153 performing radiation heating are arranged in a tile shape as the upper heating means 151 and the lower heating means 152. A mid-infrared quick response heater is adopted as the heater 153, and it is possible to quickly heat the resin sheet S, which is the heated object. Here, when the feeding dimension of the resin sheet S is set to match the width x of the upper mold 201 and the lower mold 202 provided in the molding section 200 as shown in FIG. 2, it may not match the multiple of the dimension y of the heater 153. By adjusting the position of the cooling means 157, it is possible to block the heat from the heater 153 and adjust the heating condition of the resin sheet S.

[0033] The upper heating means 151 is disposed on the upper side, and is configured so that it can be moved toward or away from the above by a lifting function (not shown) relative to the transported resin sheet S. Similarly, the lower heating means 152 is configured so that it can be moved toward or away from the below of the resin sheet S by a lifting function (not shown). Note that the means for driving the lifting device that moves the upper heating means 151 and the lower heating means 152 is not particularly limited, but it is preferable to use a drive mechanism that can be stopped at any position.

[0034] The upper heating means 151 has an upper heater plate 151a on which heaters 153 are arranged, and an upper housing 151b, and an upper heat insulating sheet 161 is provided on the outside of the metallic upper housing 151b. The lower heating means 152 has a lower heater plate 152a on which heaters 153 are arranged, and a lower housing 152b, and a lower heat insulating sheet 171 is provided on the outside of the metallic lower housing 152b. Note that the upper housing 151b and the lower housing 152b need to be made of a metal that exhibits ferromagnetic properties (i.e., a metal to which a magnet is attracted).

[0035] Since the resin sheet S is transported between the upper heating means 151 and the lower heating means 152, it is necessary that the heat insulating material is divided into an upper heat insulating sheet 161 and a lower heat insulating sheet 171 on the surface along which the resin sheet S is transported. In addition, as will be described later, the upper heat insulating sheet 161 and the lower heat insulating sheet 171 must be provided so as not to interfere with the transport of the resin sheet S, the above-mentioned cooling means 157, electrical wiring, etc.

[0036] FIG. 4 shows a cross-sectional view of the lower heat insulating sheet 171. FIG. 5 and FIG. 6 show perspective views of the heating unit 150. The lower heat insulating sheet 171 is configured such that an outer skin 172 made of silicone-coated glass cloth coated with silicone (registered trademark) to prevent heat-resistant fibers from scattering is wrapped with a heat insulating material 173 filled with a heat insulating material such as glass wool to improve heat insulation. The thickness of the heat insulating material is about 5 to 15 mm. The stitching points 158 are sewn with heat-resistant thread such as Teflon (registered trademark)-treated glass yarn. The heat insulating material 173 is wrapped in the outer skin 172 and closed by the stitching points 158 provided on the top, bottom, left and right sides to prevent scattering to the outside.

[0037] The lower heat insulating sheet 171 is held by a holder 156 to the side surface of the lower housing 152b. The holder 156 is made up of bolts 156a, nuts 156b, and heat-resistant magnets 156c, and a plurality of holders 156 are fixed to the lower heat insulating sheet 171. It is desirable to use, for example, a samarium-cobalt magnet or an alnico magnet, which exhibits high heat resistance, as the heat-resistant magnet 156c, because it is required that the magnet does not demagnetize even when the heating unit 150 becomes hot.

[0038] The holder 156 is divided into a heating section zone 171b and a supply section zone 171a by a boundary sewing point 158b, and can be positioned using the boundary sewing point 158b as a marker. The holder 156 is provided in the heating section zone 171b, and the supply section zone 171a is a portion that protrudes upward from the lower housing 152b. The holder 156 attaches the upper heat insulating sheet 161 to both outer surfaces of the upper housing 151b, and attaches the lower heat insulating sheet 171 to both outer surfaces of the lower housing 152b. It is preferable that a heat insulating material (not shown) is provided separately on the upper surface of the upper housing 151b or the lower surface of the lower housing 152b.

[0039] The lower heat insulating sheet 171 is provided with bag-shaped sewn portions 171c at regular intervals as shown in FIG. 5. The bag-shaped sewn portions 171c are arranged perpendicular to the longitudinal direction of the lower housing 152b, i.e., the conveying direction of the resin sheet S, and metal flat plates are inserted inside the bag-shaped sewn portions 171c as support pillars (not shown). This allows the lower heat insulating sheet 171 to stand on its own, and the supply zone 171a is held without sagging. The material used for the support is required to have heat resistance and a lightweight property so that the lower heat insulating sheet 171 does not shift, and it is preferable to use an iron plate, and it is preferable to round off the corners so as not to damage the lower heat insulating sheet 171. Of course, materials other than iron may be used.

[0040] Similarly to the lower heat insulating sheet 171, the upper heat insulating sheet 161 is provided with a supply section zone 161a and a heating section zone 161b sandwiching the boundary sewing portion 158a. The heating section zone 161b is a portion that abuts against the side surface of the upper housing 151b, and the supply section zone 161a is a portion that protrudes downward from the upper housing 151b. The protruding length of the supply section zones 161a and 171a is set so as not to interfere with the gripper 155d, other protrusions (such as the cooling means 157), or the conveying mechanism 155. The heating section zone 161b is provided with a plurality of holders 156, and the upper heat insulating sheet 161 is also provided with a structure that is easily attached to and detached from the upper housing 151b, similar to the lower heat insulating sheet 171.

[0041] As shown in Fig. 6, the upper heat insulating sheet 161 and the lower heat insulating sheet 171 are provided with cuts required for the wiring 154 and the cooling means 157. The wiring 154 is connected to the lower heating means 152 to supply power. Although Fig. 6 illustrates the wiring 154 being provided in only one place, it is not precluded from providing multiple wirings (not shown). The upper heat insulating sheet 161 is provided with multiple cuts 161d, and the lower heat insulating sheet 171 is also provided with multiple cuts 171d.

[0042] The cutout 161d in the upper heat insulating sheet 161 is provided in the supply zone 161a so that the cooling means 157 is not disturbed when it moves. The cutout 171d in the lower heat insulating sheet 171 is provided so that the lower heat insulating sheet 171 can be removed while avoiding the wiring 154. In this way, it is preferable that the cutouts 161d and 171d are appropriately provided in the upper heat insulating sheet 161 and the lower heat insulating sheet 171 so as to avoid the protrusions provided in the heating unit 150, that is, the portions provided in a form protruding from the side surface of the upper housing 151b. The shape and location of such protrusions differ depending on the configuration of the thermoforming device 100, so that the cutouts 161d, 171d or cutouts corresponding to the protrusions must be provided.

[0043] The thermoforming apparatus 100 of this embodiment has the above-mentioned configuration and therefore provides the following functions and effects.

[0044] First, the power consumption of the thermoforming device can be reduced, making it possible to achieve energy conservation. This is achieved by detachably fixing heat insulating sheets (upper heat insulating sheet 161 and lower heat insulating sheet 171) to the outer surfaces of the upper heat insulating means 151 and the lower heat insulating means 152 in the thermoforming device 100, which is equipped with a heating section 150 having upper heat insulating means 151 that heats the resin sheet S from above and lower heat insulating means 152 that heats the resin sheet S from below, a molding section 200 that molds the resin sheet S, and a conveying mechanism 155 that conveys the resin sheet S.

[0045] The heat insulating sheets (upper heat insulating sheet 161 and lower heat insulating sheet 171) are formed by sewing a cloth material having heat insulating properties, and include an upper heat insulating sheet 161 arranged on the upper side divided by the conveying surface of the resin sheet S conveyed by the conveying mechanism 155 and fixed to the outer surface of the upper heating means 151, and a lower heat insulating sheet 171 arranged on the lower side of the heating section 150 and fixed to the outer surface of the lower heating means 152. The upper heat insulating sheet 161 and the lower heat insulating sheet 171 have heating section zones 161b, 171b in contact with the outer surface of the heating section 150, and supply section zones 161a, 171a extending from the heating section zones 161b, 171b to the conveying surface side, and the lower heat insulating sheet 171 is provided with pillar sections (bag-shaped sewn sections 171c) arranged in parallel at regular intervals and perpendicular to the feed direction of the resin sheet S, and aggregate is passed through the bag-shaped sewn sections 171c.

[0046] Heating section 150 of thermoforming device 100 employs a configuration in which resin sheet S is heated from above and below by upper heating means 151 and lower heating means 152. For this reason, it was previously impossible to prevent heat dissipation from the sides as described in the problem section, but by attaching upper heat insulating sheets 161 to both sides of upper heating means 151 and lower heat insulating sheets 171 to both sides of lower heating means 152, it is possible to prevent heat dissipation.

[0047] Specifically, upper heating means 151 is made up of upper heater plate 151a and upper housing 151b, with upper heat insulating sheet 161 held on the side of upper housing 151b, and lower heating means 152 is made up of lower heater plate 152a and lower housing 152b, with lower heat insulating sheet 171 held on the side of lower housing 152b, which contribute to suppressing heat dissipation from the sides. Also, by providing upper heat insulating sheet 161 and lower heat insulating sheet 171 with supply section zones 161a and 171a, it is possible to reduce the opening area of ​​the resin sheet S transport section.

[0048] In a thermoforming device 100 of the type that unwinds a long resin sheet S from an original roll 111, a conveying mechanism 155 conveys the resin sheet S from an unwinding section 110 through a heating section 150 to a forming section 200. For this reason, as shown in FIG. 2, the conveying mechanism 155 is disposed at the end of the resin sheet S in the width direction, and is structured to grip and convey the end of the resin sheet S. Therefore, all of the side opening A1 shown in FIG. 3 and the carry-out side opening A2 and carry-in side opening A3 shown in FIG. 1 are opened. Due to this structure, it has been difficult to provide a heat insulating material in the past, and it has been thought that the effect would be limited.

[0049] However, the applicant's research has revealed that by using the upper heat insulating sheet 161 and the lower heat insulating sheet 171 and providing the upper heat insulating sheet 161 and the lower heat insulating sheet 171 with the supply zones 161a and 171a, it is possible to expect an energy saving effect of 5 to 10% compared to the conventional method. The comparison of the amount of power was calculated by operating the thermoforming device 100 with and without the upper heat insulating sheet 161 and the lower heat insulating sheet 171 attached and calculating the average amount of power for a certain period of time when the amount of power stabilized. As a result, it has been confirmed that both the current value and the amount of power can be reduced even under the same conditions. In addition, as a secondary effect, the environmental temperature can be suppressed by suppressing heat radiation from the sides, which is expected to improve the work performance. This leads to suppressing the temperature rise in the factory, which also has an energy saving effect.

[0050] As a measure to make the open area of ​​the side opening A1 as small as possible, the supply zone 171a of the lower heat insulating sheet 171 is provided with a plurality of bag-shaped sewn sections 171c into which metal plates as aggregates can be inserted so that the sheet can stand on its own. This allows adjustment so that the side opening A1 is as narrow as possible without interfering with the resin sheet S or the conveying mechanism 155.

[0051] In addition, a heat-resistant magnet is used as a means for fastening the upper heat insulating sheet 161 and the lower heat insulating sheet 171, and a ferromagnetic metal is used on the outer surfaces of the upper housing 151b and the lower housing 152b, making it easy to attach and detach the upper heat insulating sheet 161 and the lower heat insulating sheet 171 and improving maintainability. A heat-resistant magnet 156c is used for the holder 156 used as a means for fastening the upper heat insulating sheet 161 and the lower heat insulating sheet 171, while the upper housing 151b and the lower housing 152b use a ferromagnetic metal, i.e., a steel plate, making it easy to attach and detach. This makes it easy to remove the upper heat insulating sheet 161 and the lower heat insulating sheet 171 when performing maintenance on the heating unit 150.

[0052] Furthermore, the supply section zone 161a and the heating section zone 161b of the upper insulation sheet 161 are provided on either side of the boundary sewing point 158a. The supply section zone 171a and the heating section zone 171b of the lower insulation sheet 171 are provided on either side of the boundary sewing point 158a. Therefore, when attaching the upper insulation sheet 161 and the lower insulation sheet 171 to the upper housing 151b and the lower housing 152b, the work can be easily performed because the boundary sewing point 158a and the boundary sewing point 158a can be used as a marker for positioning. This configuration also contributes to improved maintainability.

[0053] As shown in Fig. 6, the cutout 161d in the upper heat insulating sheet 161 has a plurality of cutouts or slits in the supply zone 161a to accommodate the movement of the cooling means 157. The cutout 171d in the lower heat insulating sheet 171 is provided so that the lower heat insulating sheet 171 can be removed while avoiding the wiring 154. By providing such cutouts 161d and 171d appropriately, it is designed to make it easy to remove the upper heat insulating sheet 161 and the lower heat insulating sheet 171. Also, the opening area of ​​the side opening A1 shown in Fig. 3 is minimized, so that the operation of the thermoforming device 100 is not hindered.

[0054] The thermoforming device 100 according to the present invention has been described above, but the present invention is not limited to this, and various modifications are possible without departing from the spirit of the present invention. For example, although it has been described that the thermoforming device 100 of this embodiment uses the heater 153 that performs radiant heating, this does not prevent a heating method using a hot plate from being used as necessary. [Explanation of symbols]

[0055] S Plastic Sheet 100 Thermoforming equipment 150 Heating section 151 Upper heating means 152 Lower heating means 155 Transport mechanism 161 Upper insulation sheet 161a Supply Zone 161b Heating Zone 171 Lower insulation sheet 171a Supply Zone 171b Heating Zone 171c Bag-shaped sewing part 200 Molding section

Claims

1. A thermoforming device including a heating section having an upper heating means for heating a resin sheet from above and a lower heating means for heating a resin sheet from below, a forming section for forming the resin sheet, and a conveying mechanism for conveying the resin sheet, a heat insulating sheet is detachably fixed to the outer surfaces of the upper heating means and the lower heating means; The heat insulating sheet is A thermal insulating fabric material is sewn to form the an upper heat insulating sheet that is arranged on an upper side of the resin sheet divided by a conveying surface of the resin sheet conveyed by the conveying mechanism and is fixed to an outer surface of the upper heating means; A lower heat insulating sheet is disposed under the heating section and fixed to an outer surface of the lower heating means, The upper heat insulating sheet and the lower heat insulating sheet each have a heating section zone in contact with an outer surface of the heating section and a supply section zone extending from the heating section zone to the conveying surface side, The lower heat insulating sheet is provided with column portions arranged in parallel at regular intervals and perpendicular to the feeding direction of the resin sheet, and aggregate is passed through the column portions; A thermoforming device comprising:

2. 2. The thermoforming apparatus of claim 1, A heat-resistant magnet is used as a fixing means for the upper heat insulating sheet and the lower heat insulating sheet, A ferromagnetic metal is used on the outer surface of a housing used in the heating unit; A thermoforming device comprising:

3. 3. The thermoforming apparatus according to claim 1, A shielding plate provided in the heating unit has a water channel formed therein and is provided with a pipe connected to the water channel; An electrical wiring is provided that is connected to the heating unit, The upper heat insulating sheet or the lower heat insulating sheet is provided with a slit portion for avoiding the piping and the electrical wiring; A thermoforming device comprising:

4. In a thermoforming machine having a heating section for heating a resin sheet, a heat insulating sheet is attached to a side surface of the heating section, The resin sheet has an upper heat insulating sheet arranged above the heating section and a lower heat insulating sheet arranged below the heating section, the upper heat insulating sheet being divided by a conveying surface of the resin sheet, The upper heat insulating sheet and the lower heat insulating sheet include: Silicone-coated glass cloth is used as the outer layer, and glass wool is used as the inner insulation. A heating section zone in contact with the thermoforming machine and a supply section zone extending from the heating section zone, The heating zone and the supply zone are partitioned by a sewing section sewn together with a heat-resistant thread, A notch is provided corresponding to the protrusion of the heating portion, The lower heat insulating sheet is provided with a bag portion into which a support pole is inserted at regular intervals; A heat insulating sheet characterized by:

5. The heat insulating sheet according to claim 4, The upper and lower heat insulating sheets are fixed to the thermoforming machine using heat resistant magnets; A heat insulating sheet characterized by:

6. Insulation sheets attached to the side of the heater hot plate of vacuum and pressure forming machines, It has a thickness of 5 mm to 20 mm, a hot plate zone and a supply zone, The supply zone is formed according to the shape of a protrusion such as a rail wiring of the vacuum / pressure molding machine, The lower heat insulating sheet attached to the lower part of the heater hot plate has a function of inserting a support pillar to make it stand on its own. A heat insulating sheet characterized by:

7. The heat insulating sheet according to claim 6, A slit is provided so that the water jacket can be attached even if it is movable. A heat insulating sheet characterized by:

8. The heat insulating sheet according to claim 6 or 7, A heat-resistant magnet is provided. A heat insulating sheet characterized by:

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