FR2992293A1 - Method for filling insulating box with insulating liner, installed in wall of e.g. methane tank utilized in ship to store hot products, involves deforming liner between compression zone of upper surface of liner and edge of upper surface - Google Patents

Abstract

The method involves inserting a roll of flexible insulating liner (36) into an internal space (31) of a box. The liner is pushed along lateral walls (34) of the box to a base wall (33) of the box for insertion of the liner into the internal space. The liner is provided in contact with one lateral wall. Pressure is applied on an upper surface of the liner to compress the liner against the base wall. The liner is deformed between a compression zone (43) of the upper surface and an edge of the upper surface to release a side of the liner from the lateral wall and to release the upper surface. An independent claim is also included for a machine for filling an insulating box.

Description

The invention relates to the field of the manufacture of heat insulating elements for a sealed and thermally insulated tank. In particular, the present invention relates to a device for filling casings heat-insulated with a heat-insulating lining.

Waterproof and thermally insulating vessels can be used in different industries to store hot or cold products. For example, in the energy field, liquefied natural gas (LNG) is a liquid that can be stored at atmospheric pressure at about -163 ° C in land-based storage tanks or tanks embedded in floating structures.

Such a tank is described in particular in document FR-A-2798902. Indeed, this document describes a sealed and thermally insulating tank integrated in a ship carrying structure, which comprises two successive sealing barriers: a primary barrier is in contact with the product contained in the tank, and a secondary sealing barrier is disposed between the primary barrier and the carrier structure. Each thermally insulating barrier consists of a plurality of generally parallelepipedic shaped boxes, each box having a bottom panel and a top panel of plywood. The panels of each box are spaced apart from each other by a plurality of spacers which consist of thin plates of plywood, for example of the order of 4 mm thick, extending perpendicular to said panels. Each box is at least partially filled with blocks of low density foam of the order of 33 to 40 Kg / m3 stuck on a substantial portion of the height of each spacer. To achieve these boxes the document describes a method of alternately stacking a plurality of layers of foam, and a plurality of plywood plates, with interposition of adhesive between each layer of foam and each plate. This stack is made until the height of said stack corresponds to the length of said boxes. The aforementioned stack is then sliced in the direction of the height at regular intervals corresponding to the thickness of a box. A bottom panel and a top panel of plywood is then glued on either side of each stack slice thus cut, the panels extending perpendicular to said cut plates which serve as spacers. However, the realization of such a box is complex and requires a large number of assembly operations.

According to one embodiment, the invention provides a method of filling a heat insulating box comprising the steps of: inserting a flexible heat-insulating lint roll into an internal space of the box, the box comprising a bottom wall and walls which delimit the internal space, the insertion of the heat-insulating lint roll being carried out by pushing the heat-insulating lint roll along the side walls to the bottom wall of the box, the heat-insulating lint being in contact with minus one side wall of the box, - exerting pressure on an upper surface of the heat seal roll to compress said heat seal roll against the bottom wall of the box, - deforming the lagging bar with differential compression between an area of the upper surface spaced from an edge of the upper surface of the heat seal roll and the edge of the upper surface of in order to untap one side of the heat-insulating liner from the side wall of said casing, - to release the upper surface of the heat-insulating liner. According to embodiments, such a method may include one or more of the following features. In embodiments, the step of exerting pressure on the upper surface of the bread includes a step of pressing on the edge of the upper surface of the heat seal roll to support a corresponding edge of the bottom surface of the bread. heat insulating packing on the bottom wall of said box. According to embodiments, the step of exerting pressure on the upper surface of the bread comprises a step of pressing on the area of the upper surface spaced from the edge of the upper surface of the heat seal roll prior to the step of pressure on the edge of the upper surface. In embodiments, the differential compression is exerted by releasing the pressure exerted on the edge of the upper surface before releasing the pressure on the region spaced from said edge. According to embodiments, the pressure exerted on the upper surface, in the step of exerting pressure on the upper surface of the bread, is achieved by means of a pusher having a flat surface bearing on the whole of the upper surface of the heat seal roll.

According to embodiments, the differential pressure is exerted by pressing a second pusher only on the area of the upper surface spaced from the edge. According to embodiments, the heat-insulating lint roll is a glass wool loaf or a flexible polymeric foam bead, for example low-density heat-insulating foam. In embodiments, the heat seal roll consists of a plurality of superimposed heat seal layers. In embodiments, an anticonvection sheet is positioned between two overlapping heat insulating layers.

According to embodiments, the zone spaced from the edge is a central zone of the upper surface. According to one embodiment, the invention also provides a heat insulating box filling machine comprising: - a holding device adapted to maintain a box, - a support device adapted to exert pressure on a top surface of a bread heat-insulating liner for compressing said heat seal roll against a bottom wall of the housing and capable of deforming the heat-insulating lint roll by differential compression between an area of the upper surface spaced from an edge of the upper surface of the heat-seal liner and the edge of the upper surface so as to disengage one side of the heat seal roll from a side wall of said housing. According to embodiments, such a machine may include one or more of the following features. According to embodiments, the support device comprises: - a first pusher having a flat surface capable of resting on the entire upper surface of the heat-insulating lint roll to compress said heat-insulating lint and - a second pusher having a surface of dimensions smaller than the dimensions of the upper surface and able to bear only on the area of the upper surface spaced from the edge to deform said heat seal roll. According to embodiments, the support device comprises: a central support column adapted to slide towards the holding device in a thrust direction, a deformable blade bearing on the base of the central support column and s extending on each side of the support column, the blade having two ends, a slide slidable relative to the support column and relative to the holding device in said thrust direction, and connected to the end of the deformable blade and adapted to pull on the end of the deformable blade to deform, an actuating device capable of causing said sliding of the central support column in the direction of pushing and said sliding of the slide relative to the column d central support. According to embodiments of the filling machine, the deformable blade and the central support column form a pusher, and the filling machine comprises a plurality of pushers juxtaposed, the support columns of the plurality of pushers being rigidly connected. between them and the slide being connected to the ends of each of the deformable blades. According to embodiments, the slide is connected to one end of the deformable blade by a guide rod, the guide rod being articulated between the end of the deformable blade and the slide. According to embodiments, the actuating device comprises: a first jack articulated between the central support column and a frame of the filling machine and able to cause the sliding of the support column in the direction of thrust and a second cylinder hinged between the central support column and the slide and adapted to cause the sliding of the slide relative to the central support column. According to embodiments, the machine further comprises a chamber adapted to be traversed by the support device, the chamber having vertical side walls and a holding plate extending under a side wall in an oblique direction relative to the side wall, the holding plate being adapted to maintain a heat insulating lint roll in said chamber. According to embodiments, the filling machine comprises a supply cell communicating with the chamber on one side of said chamber, and a vertical separating member slidable to isolate the supply cell from said chamber at the level of the chamber. communication between the chamber and the supply cell.

Some aspects of the invention start from the observation that during the manufacture of a heat insulating box comprising a step of inserting a heat-insulating lining block in a space delimited by side walls and a bottom wall, it can be formed empty spaces between the block and the walls as a result of the flexibility and elasticity of the heat-insulating lining and the friction thereof against the box walls. These voids significantly degrade the thermal performance of the boxes. An idea underlying the invention is to set up a block of heat insulating packing in a space of a thermally insulating element delimited by a bottom wall and side walls by compressing the block in the space and then realizing a differential compression located on the block in order to unclog the walls. Thus, no gap between the heat-seal pack and the walls remains after the establishment of the block in space.

Certain aspects of the invention start from the idea of avoiding the realization of a vacuum at a lower surface of a heat-insulating lining block when it is put in place by compressing substantially the entire upper surface of the block during its set up. Some aspects of the invention are based on the idea of providing a machine that can provide a thermal insulation box that is well filled at its internal surfaces. The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the course of the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes. with reference to the accompanying drawings. In these drawings: FIG. 1 is a detailed perspective view of an embodiment of a box filling machine. FIG. 2 is a side view of the lower part of the filling machine of FIG. 1. FIGS. 3a to 3d show in detail steps of the method of filling a box with the aid of the machine Figure 4 is a schematic diagram of the hopper receiving glass wool blanks. FIGS. 5a to 5e schematically represent insertion process steps and a heat insulating pack block in a space of a box. FIGS. 1 and 2 show a filling machine 1 during the filling of plywood boxes 2. The boxes 2 are intended to be placed in a sealed and thermally insulated tank wall, for example a tank of a tanker vessel or a tank earthly. Each box 2 is of substantially parallelepipedal shape and consists of a rectangular bottom panel 3 on which are fixed two side panels 4. Eight parallel spacers 5 extend between the side panels and thus form seven rectangular compartments 6.

In particular, the spacers 5 are plywood plates which are stapled to the bottom panel 3 and are intended to carry a lid panel set up after the filling of the box 2. The filling machine 1 shown in FIG. filling the boxes 2 with an insulating gasket. For this purpose, each box 2 is fed in a direction of advance 11 under a filling system 7 of the filling machine 1 by a conveyor belt (not shown). When a box 2 is brought by the belt, the box 2 is guided by a guide device to an immobilization system. The immobilization system positions and blocks the casing 2 under the filling system 7. The filling system 7 then pushes a heat-insulating lining in the form of a set of heat-insulating breads in the compartments 6 of the immobilized casing 2. The filling system 7 is, in turn, supplied by a feed system 8.

The guide device consists of a guide rail 9 which passes through the immobilizer and extends on each side of the immobilizer. On the opposite side of the carpet, a rim element 10 hinged about a pivot 11 allows to press a box 2 against the guide rail 9 when approaching the immobilizer. The arrival of a box 2 in the immobilization system is detected by a probe that causes the locking of the box 2 by the immobilization system. For this purpose, when the box 2 is detected, a locking member 12 is actuated to block the translation of the box 2 in the direction of advance 13 of the box 2. A second locking member 12 then block the translation of the box 2 in an opposite direction and a lateral locking member presses and press the housing 2 against the guide rail 9. The two locking members 12 each have a bracket 14 which is fixed at one end to the frame 15 of the machine 1 by through a pivot 16, and has a pad 17 at its second end. Each of the locking members 12 is actuated by a jack 18 hinged between the frame 15 and the locking member 12 to cause the rotation of the locking member 12 from a position above the boxes to the side walls of the box 2.

The lateral locking member is constituted by a pad actuated horizontally in translation relative to the frame 15 by a jack so as to push the box 2 against the slide 9. The box 2 is thus blocked at its four sides. When the casing 2 is immobilized, the filling system 7 inserts a heat seal roll in each of the compartments 6 of the casing 2 and pushes the heat-insulating seal to the bottom of the casing 2. In particular, the filling system 7 comprises seven pushers 19 each for pushing a heat seal roll from and through a corresponding vertical chamber to a corresponding compartment 6. The seven pushers 19 are adjacent and actuated in vertical translation jointly by a common push rod 20 fixed to the upper end of the pushers 19. The push bar 20 is actuated vertically by a vertical jack 21 positioned above the push bar 20 and supported on a frame 22 of said frame 15. The frame 22 is held above the pushers by four vertical legs 23 resting on a table 24 of the frame 15 of the machine. The push rod 7 is in turn slidably connected to the legs 4 of the frame 15. For this purpose, two profiles 25 are rigidly connected to the ends of the push rod 20, each end of the profiles 25 being slidably connected. along a respective foot 23.

In order to allow the insulating insert to be inserted into the boxes, the supply system 8 supplies the vertical chambers of the push-buttons 19 from the side. For this purpose, the feed system 8 is composed of seven troughs 26 communicating with the side of the supply chambers. These troughs are supplied manually by an operator who superimposes six successive slices of heat-insulating material in the troughs to form loaves of heat-insulating material. During a prefabrication stage of slabs of heat-insulating material in the factory, an anticonvection sheet is directly adhered to one side of the slices of heat-insulating material. When the operator superimposes the slices, it positions the slices so that the anticonvection sheets are present between successive slices of heat insulating bread to limit convection between the slices during the implementation of the box. Thus, the anticonvection sheets prevent a convection according to the thickness of the heat insulating box likely to degrade the thermal characteristics of the box, especially when the slices are made of glass wool. Thus, 42 slices of material are positioned for each filling cycle of a box 2. However, the slabs of heat-insulating material can also be formed in one piece. In other embodiments, the heat seal roll may consist of a plurality of slices of heat insulating material without having an anticonvection sheet.

The heat-insulating material may be made of glass wool. Similarly, the heat-insulating material may be an insulating foam, for example a low-density foam or any other heat-insulating lining having a certain elasticity allowing its deformation.

A pusher blade 27 is present in each trough 26 and can slide along the base of the trough 26 to push a heat seal bread previously placed by an operator to a supply chamber. The displacement of the plow blades 27 is actuated by a motor 28 connected by a belt to a pulley causing the translational movement of the plow blades 27 to the vertical chambers. When the heat-insulating lining blocks are present in the vertical chambers, seven guillotine blades 29 isolate the vertical chambers of the troughs 26, and the pusher blades 27 retract to return to their initial position, thus enabling an operator to continue to supply the machine 1 in heat seal rolls. For this purpose, a cylinder 30 connected to the upper frame 22 of the machine translates the guillotine blades 29 in a vertical direction towards the bottom of the machine to close the vertical chambers. The seven pushers 19 can thus go down to introduce the insulating packing loaves present in the vertical chambers.

The pushers 19 retract and the guillotine blade 29 are then reassembled. The locking members 12 are then unlocked so as to release the solid box and to allow the arrival of the next empty box 2. When inserting the heat-insulating liner rolls into the compartments, the heat-insulating seal may rub against the side panels 4 and the spacers 5, for example in the case where the block of heat insulating packing has dimensions equivalent to or slightly greater than the compartment 6. This friction may cause a clearance or voids at the corners of the compartments 6 located between the side panels 4 and in the bottom panel 3, and between the spacers 5 and the bottom panel 3. In other words, when the heat-insulating liner rubs and adheres to the inner walls of the casing 2 while descending therein, the liner is deformed because of its flexibility and does not reach the bottom of the compartment 6 and which generates unfilled spaces. However, unfilled spaces are potentially convection chimneys that degrade the thermal performance of the boxes. FIGS. 3a to 3d show in greater detail the filling system 7 of the machine 1 making it possible to fill the boxes 2. FIGS. 3a to 3d show a sectional view of the machine 1 at a central pusher 54, when an empty box 2 is positioned below it. Referring to Figure 3a, each pusher consists of a vertical metal section 50 at the top of which is fixed the thrust bar 20 and at the base of which is fixed a deformable blade 51. The deformable blade 51 extends on each side from the metal section 50 above the vertical chamber 52 to the ends of the vertical chamber 52. The chamber 52 maintains a heat insulating packing 56 before being inserted into the compartment 6 of the box 2. The structure of such a vertical chamber 52 is diagrammatically illustrated in FIG. 4. The vertical chamber comprises side walls 61, as well as an upper opening 63 and a lower opening 64 to allow the pusher 19 and the heat-insulating liner 56 to pass through. 4, the vertical chamber 52 is illustrated when it includes a heat seal bread 56 composed of a plurality of slices 60. The bread 56 is held in place beforehand at the depression in the casing 2 by retaining blades 62 extending from the side walls 61 and slightly folded towards the median plane of the chamber. The holding blades 62 thus form an angle with the side walls 61 of the chamber 52. A common slider 53 for the metal sections 50 of all the pushers 19 is slidably mounted relative to the vertical section 50 and is slidably connected to the four feet 23, similarly to the bar 20. The slider 53 is actuated in translation relative to the vertical section 50 by an inner jack placed inside the section 50 and bearing on it. In particular, it is possible to observe the fasteners 57 of the internal jack in FIG. 3a. The rod of the inner cylinder is connected to the slide 53 through a groove formed on one side of the vertical section 50. Specifically, the blade 51 comprises a rigid central portion and two end portions 58 also rigid which are each hinged to a respective side of the central portion 65. Each deformable blade 51 is connected in each of its end portions 58 to the slider 53 via a rod 55 articulated between the slider 53 and said deformable blade 51. In this way when the slider 53 slides relative to the vertical section 50, the blade 51 curves. For example, with reference to FIG. 3a, the pusher 19 is shown in a position prior to supplying the vertical chamber 52 with a heat seal roll 56. The rod of the jack 21 is thus retracted and the rod of the internal jack went out. Thus the pusher 19 is positioned at the top of the machine 1 and the slider 53 is in a position close to the base of the vertical section 50. Therefore, the deformable blade is flat. FIG. 3b shows the pusher 19 following the feeding of the chamber 52 and following the thrust of a heat seal bread 56 to the bottom of the box 2 by the pusher 19. The bread 56 initially has a slightly greater thickness at the height of the compartment 6. Indeed, the bread 56 may have a height greater than 2 to 10% relative to the height of the compartment 6. Thus, during the insertion of the bread 56 into the compartment 6, the bread can being compressed so as to allow complete filling of the compartment 6. The thrust is caused by the descent of the pusher consistent with the rod outlet of the cylinder 21. When the pusher 19 is lowered, the rod of the inner cylinder returns to move away the slider 53 of the base of the vertical section 50. Thus, the slider 53 pulls the end portions 58 of the deformable blade 51 and thus causes their raising. The descent of the pusher 19 is stopped when the blade portion 51 has under the vertical profile 50 is in a position protruding into the compartment 6. In this way, the heat seal bread 56 is compressed by the central portion 65, which ensures that the central portion of the bread 56 is well inserted to the bottom of the compartment 6. In a next step, shown in Figure 3c, the filling machine 1 causes the descent of the slider 53 by the rod outlet of the inner cylinder. The descent of the slider 53 is transmitted to the end portions 58 of the deformable blade 51 until the blade 51 has a flat shape. The blade 51 then causes a compression also on the edges 59 of the heat seal bread 56 which makes it possible to ensure the insertion of the edges 59 to the bottom of the heat insulating box 2 and to avoid any gap between the heat seal roll 56 and the bottom of the box 2. Figure 3d illustrates the next step, wherein the slider 53 is pulled up by the inner cylinder so as to bend the blade 51 again. However, the center of the bread 56 remaining compressed, the upper parts of the edges 59 of the bread 56 tend to be brought towards the center of the bread 56, which allows the edges 59 to be unraveled with respect to the side panels 4, the seizing of the edges being for example due to the dimensions of the bread 56 and / or flattening the bread 56 during the compression step illustrated in Figure 3c. The pusher 19 then retracts by retracting rod of the cylinder 21. The retraction of the pusher 19 allows to bring the edges 59 in abutment against the side panels 4 of the box 2. Thus, the boxes 2 are filled at the walls, without create convection chimney or voids. With reference to FIGS. 5a to 5e, stages of another method of filling a space 31 in a box 32 to avoid the generation of this type of void will be schematically described. This method makes it possible to fill the caissons 2 in an alternative manner to the method described with reference to FIGS. 3a to 3d, in order to avoid the generation of empty spaces. Referring to Figure 5a, there is an empty box 32 having a bottom wall 33 and side walls 34, and an open top face 35, in an initial step. An insulating heat-insulating lining block 36 is positioned above the open upper face 35, for example by being held in a vertical chamber presented with reference to FIG. 4. The heat-insulating lining block 36 has dimensions substantially equal to the dimensions of the liner. internal space 31 of the box 32 and is composed of a substantially flexible and elastic material. FIG. 5b illustrates the following step in which a thrust member 37 inserts the heat insulating pad 36 into the space 31 of the box 32 by pressing substantially the entire upper surface 38 of the block 36. The block 36 is then compressed. to fill the entire space 31 and lower corners 39 of the space 31. The thickness of the block 36 is reduced and the block 36 bears on substantially all the walls of the box 32. The push member 37 is then retracted upwards as shown in FIG. 5c. However, it is observed that because of the initial dimensions of the heat-insulating lining unit 36 and the compression thereof in the preceding step, the lateral faces 40 of the block 36 remain in abutment and frictionally adhered to the internal walls. 34 of the box 32. Thus, there remains a game 42 between the upper surface 38 of the block 36 and the end of the side walls 34, which may cause convection phenomena during the implementation of the box 32. to remove this game 42, a point support member 41 compresses a central zone 43 of the upper surface 38 of the heat seal block 36, which therefore reduces the thickness of the block 36 at its center. The difference in compression between the central zone 43 of the block 36 and the edges 44 of the upper surface 38 causes the deformation, in particular in flexion, of the latter. The difference in compression here results in a greater compression exerted on the central zone 43 of the block 36 with respect to the edges 44. The upper part of the lateral faces 40 of the block 36 therefore tend to approach the center of the block, which causes their loss of adhesion relative to the side walls 34 of the box 32 and possibly their separation of the walls 34. Thus, the sides of the block can, elastically, substantially recover their original thickness. Finally, with reference to FIG. 5e, the point support member 41 is retracted. Thus, the center of the block 36 substantially elastically resumes its original thickness, thus reducing the lateral faces 40 of the block 36 against the side walls 34 of the box 32 and thus eliminating the clearance 42. Such a method makes it possible to avoid any vacuum at the level of the lower surface 45 and at the upper surface 38 of the heat insulating pad 36. The machine described above can also be modified to implement this method. For this, the deformable blade 51 is replaced each time by a pair of pushers 37 and 41 operable successively. In the embodiments described above, a point pressure is made in the center of the heat-insulating lining blocks to release the edges of the heat-insulating lining by the effect of a pressure differential between several areas of the upper surface of the lining. . Alternatively, a pressure may be exerted in several areas of the upper surface of the heat-insulating packing blocks. In addition, the pressure can be exerted on a non-central area of the insulation packs.

Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps.

In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims (19)

REVENDICATIONS1. A method of filling a heat insulating box (1) comprising the steps of: - inserting a flexible heat seal roll (36, 56) in an internal space (6, 31) of the box (2, 32), the box comprising a bottom wall (3, 33) and side walls (4, 5, 34) which delimit the internal space, the insertion of the heat-insulating lint roll being carried out by pushing the heat-insulating lint roll along the side walls until to the bottom wall (3, 33) of the box, the heat seal roll being in contact with at least one side wall of the box, - exerting pressure on an upper surface (38) of the heat seal roll to compress said insulating liner slab against the bottom wall of the housing, - deforming the heat-insulating liner roll by differential compression between an area (65, 43) of the upper surface spaced from an edge (59, 44) of the upper surface of the loaf insulation and the edge of the with the upper surface so as to disengage one side (40) of the heat seal roll from the side wall (6, 34) of said box, - to release the upper surface (38) of the heat seal roll. The method of claim 1, wherein the step of exerting pressure on the upper surface of the bread comprises a pressure step on the edge (59, 44) of the upper surface of the heat seal roll to support a corresponding edge of the lower surface (45) of the heat seal roll on the bottom wall (3, 33) of said box. The method of claim 2, wherein the step of exerting pressure on the upper surface of the bread comprises a step of pressing the area (65, 43) of the upper surface spaced from the edge of the upper surface of the bread. of heat-insulating packing prior to the pressure step on the edge of the upper surface. 4. The method of claim 3, wherein the differential compression is exerted by releasing the pressure exerted on the edge of the upper surface before releasing the pressure on the region spaced from said edge. The process according to claim 1, wherein the pressure exerted on the upper surface, in the step of exerting pressure on the upper surface of the bread, is carried out by means of a pusher (19, 38) presenting a flat surface resting on the entire upper surface (38) of the heat seal roll. 6. The method of claim 5, wherein the differential pressure is exerted by pressing a second pusher (41) only on the area of the upper surface spaced from the edge. 7. A method according to one of claims 1 to 6, wherein the heat seal bread (36, 56) is a glass wool bread. 8. A method according to one of claims 1 to 6, wherein the heat seal roll (36, 56) is a flexible polymeric foam bar. 9. A method according to one of claims 1 to 8, wherein the heat seal roll consists of a plurality of layers of heat insulating lining (60) superimposed. The method of claim 9, wherein an anticonvection sheet is positioned between two overlapping thermal insulation layers. 11. Method according to one of claims 1 to 10, wherein the zone spaced from the edge is a central zone of the upper surface. 12. Heat insulating box filling machine comprising: - a holding device adapted to maintain a box, - a support device (19, 37, 41) adapted to exert pressure on a top surface (38) of a bread heat-insulating liner for compressing said heat seal roll against a bottom wall of the housing and adapted to deform the heat-insulating liner by differential compression between an area (65, 43) of the upper surface spaced from an edge (59, 44 ) of the upper surface of the heat seal roll and the edge of the upper surface so as to depress one side (40) of the heat seal roll from a side wall (6, 34) of said housing. 13. Insulating box filling machine according to claim 12, wherein the support device comprises: - a first pusher (37) having a flat surface adapted to rest on the entire upper surface (38) of the bread heat-insulating liner for compressing said heat-insulating lint and - a second plunger (41) having a surface of dimensions smaller than the dimensions of the upper surface and able to bear only on the area of the upper surface spaced from the edge to deform said heat seal bread. 14. Insulating box filling machine according to claim 12, wherein the support device comprises: a central support column (50) slidable towards the holding device in a thrust direction, a deformable blade (51). ) resting on the base of the central support column and extending on each side of the support column (50), the blade having two ends (58), a slide (53) slidable with respect to the support column and relative to the holding device in said thrust direction, and connected to the end of the deformable blade and adapted to pull the end of the deformable blade to deform, an actuating device adapted to cause said sliding of the central support column in the direction of pushing and said sliding of the slide relative to the central support column. The heat insulating box filling machine according to claim 14, wherein the deformable blade (51) and the central support column (50) form a pusher (19), and wherein the filling machine comprises a plurality of pushers , the support columns (50) of the plurality of pushers being rigidly connected to each other and the slide (53) being connected to the ends (58) of each of the deformable blades (51). 16. Insulating box filling machine according to claim 14 or 15, wherein the slider (53) is connected to one end of the deformable blade by a guide rod (55), the guide rod being hinged between the end deformable blade and the slider. 17. Heat insulating box filling machine according to one of claims 14 to 16, wherein the actuating device comprises: a first cylinder (21) articulated between the central support column (50) and a frame (20). of the filling machine and able to cause the sliding of the support column in the direction of thrust and a second cylinder hinged between the central support column (50) and the slide (53) and able to cause the sliding of the slide relative to the central support column (50). 18. Insulating box filling machine according to one of claims 12 to 17, wherein the machine further comprises a chamber (52) adapted to be traversed by the support device (19, 37, 41), the chamber having vertical side walls (61) and a holding plate (62) extending under a side wall in a direction oblique to the side wall, the holding plate being adapted to hold a heat seal roll in said chamber . An insulating box filling machine according to claim 18, comprising a supply cell (26) communicating with the chamber (52) on one side of said chamber, and a vertical separating member (29) slidable to isolate the supply cell of said chamber at the level of communication between the chamber and the supply cell.