TW407105B - Apparatus and methods for twin sheet thermoforming - Google Patents

Abstract

Apparatus for twin sheet thermoforming has each mould half incorporating a sheet support means which can hold a sheet by its edge and support the sheet during heating and wherein at least one of the sheet support means can retract during thermoforming. The sheets are supported clear of each mould half by the supports but are heated from between. A movable heater may carry sheets while simultaneously heating and transfer heated sheets to the mould halves of the thermoforming apparatus.

Description

407105

A7 B7 V. Description of the invention (Summary of the invention: First of all, the present invention includes-a device for double sheet thermoforming, which includes-double relative can be opposed between the _ open position and a closed position during the ^ forming method Half-mould

I A sheet supporting device connected to each of the mold halves, each sheet supporting device connected to its opposite mold half, and a structure supporting the edge of the thermoformed sheet, the sheet supporting device is composed To support the relevant sheet away from the other sheet of the half-mold in its open position, each of the half-molds, the associated supporting device and the sheet are held together by a scale device for a certain calendar A controlled pressure difference can be created in the force space position and the defined volume associated with the device connecting each half-mould with its exterior. The present invention further includes a method for thermoforming a double sheet, which includes: supporting a heated thermoformed sheet on each side of the pair of mold halves, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs To provide a sealed space between the sheet and the mold half, and simultaneously control the pressure difference between an opposing sheet and each closed space between the mold half and the mold half to ensure that each sheet is avoided Subsidence of the material, changing the pressure difference has ensured that the smallest space between the sheets occurs, and only occurs, it is desired that they contact to form the part of the suture therebetween, moving the mold halves closer to each other while increasing The effect of the pressure difference makes each sheet fall into a ring-shaped welding area, and _ this paper size is applicable _ Tsuk Standard (CNS) A4 specifications ⑽ x 297 public love 5. Description of the invention (A7407105 Ministry of Economic Affairs wisdom The property bureau employee consumer cooperative prints the half-molds successively to feed the area, and creates a suture in the welded areas. The present invention further includes a double sheet thermoforming Each of the mold halves contains a sheet supporting device that can use its edges to support the sheet and can support the sheet during heating, and at least one of the sheet supports can be retracted until the heat is formed. In order to be proficient in the skills related to the present invention, without departing from the scope of the invention defined by the scope of the appended patent application, the present invention can make many structural changes and quite different embodiments and applications. Herein, these inventions and The description is for illustration purposes only and is not intended to be a limitation. Brief description of the drawings FIG. 1 is a cross-section 囷 of a dual-sheet thermal former having one of a sheet and a heater according to an embodiment of the present invention, in which the The edges of these stitched sheets are kept separate. Figure 2 is a perspective view of a portion of the former of Figure 1 showing the sheet support member, a joint film, and a portion of a film cavity. The figure is a cross-sectional view of a portion of the former of the former, in which the heater is removed and the heat forming method is also partially performed. FIG. 4 is a cross-sectional view as shown in FIG. 3, in which the heat forming is more further OK, FIG. 5 is a cross-sectional view as shown in FIG. 4, the heat forming operation is substantially completed and the double sheets are stitched together, and the sixth circle is the heat of the double sheets according to another embodiment of the present invention. A cross-sectional view of a forming device in which the edges of the stitching forming mold are mixed into the sheet support structure.

· *-1'δί-Line · (Please read the precautions on the back before filling out this page) The size of this paper is applicable to China National Standard (CNS) A4 (210 X 297 public love) A7 --- ___ B7________ 5 2. Description of the invention (4), and the modification of the finished product in the mold can be completed. FIG. 7 is a cross-section 一部分 of a part of the device in FIG. 4, in which the heating forming operation is partially performed, FIG. 8 Is a cross-sectional view as shown in FIG. 7 which further performs the heat forming process and the sheets are joined together. FIG. 9 is a cross-sectional view as shown in FIG. 8 in which the heat forming operation is almost completed, and FIG. The figure is a cross-sectional view as in FIG. 9 where the heat forming operation has been completed and the modification in the mold is completed by the cutting effect between the upper sheet support member and the lower mold half,-FIG. 11 is based on this A cross-sectional view of a sheet support assembly according to an embodiment of the invention, FIG. 12 is a cross-sectional view of a double sheet forming apparatus according to another practical example of the present invention, and FIG. 13 is a pair of sheet-forming devices according to FIG. A cross-sectional view of a sheet forming apparatus, according to the first aspect of the present invention A further idea of a composition for carrying a sheet heater. FIG. 14 shows a composition of a dual sheet forming device and a sheet heater for accompanying sheet conveyance. It also includes some details hidden under the dotted line. A section view of a region, FIG. 15 is a perspective view of one embodiment of a heater device that can accommodate sheets of different sizes, and FIG. 16 is another implementation of a heater device that can accommodate sheets of different sizes Case perspective. This paper size applies to China National Standard (CNS) A4 (21〇χ 297 mm) I n ϋ I 1 n ϋ I n I (Please read the precautions on the back before filling this page) -δ 丨 · Line-Economy Printed by the Employees 'Cooperatives of the Ministry of Intellectual Property Bureau 407105 A7 Printed by the Employees' Cooperatives of the Ministry of Economic Affairs ’Intellectual Property Bureau

___B7 V. Description of the invention (6) A7 The supporting component π can be automatically pressed down into the grooves 12 by, for example, the adjoining of the supporting component 11. Sheet separation to produce adjacent components 19 similar to the existing clip frame composition can be performed by extending the opposite side 18 of the support component 11 to provide an abutment 28 therebetween. The adjoining components 19 can also provide reasonable access between the sheets, for example, the insertion of the radiation heater 9 can heat the thermoplastic moon materials 5,6. For example, where the insertion of the heater may require external separation space, this can be controlled by selective control of the platen separation, or there may be one or more longer abutting components 19 and their lengths may be elastically pressed. Into a chamber to achieve. As shown in Figure 2, while the mold is fully hardened in a general thermoforming operation to keep the mold halves in their correct position, the abutment may still have substantial space to access the interior of the mold. In addition, it is generally expected that the joining method is only used when the edges of the mold halves are down, so that the endpoints can be kept fully open, and the sheets 5, 6 can be easily inserted in the Between these mold halves, the fixing member 20 is raised and held. The preferred sheet loading and heating method will be described later with reference to Figs. 13 to 16. Referring now to Figs. 1 to 5, it has been confirmed that a method of thermal formation can be completed by using the apparatus of Fig. 1. In Figure 1, a heater 9 is placed between the sheets shown. For example, the heater 9 may include a simple sheet radiation heater, and may be used to heat the thermoplastic sheets 5, 6 to an appropriate thermoforming temperature before processing. The heater 9 is then retracted. During the heating process, the sheets 5, 6 will soften and they will

------------- ^ i, (Please read the notes on the back before filling out this page) lSJ-. Line. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

This paper ruler ^ 297 mm) 9 Printed clothing by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 407105 A7 ___ B7 5. Description of the invention (7) They can no longer support their weight. This becomes particularly important once the sheets have reached their glass transition temperature. For ABS plastic sheet, this will happen around 90 ° C. In order to reduce the pressure drop effect of each of the chambers 24 and 25 defined by each of the sheets 5, 6 and the mold halves 1, 2 opposite to each of the sheets 5, 6 can be controlled to properly support the sheets. The details of the cavity of each mold half and the molds for thermoforming are not shown 'including the small grooves and the cavity pressure provided in the thermoforming method to control the cavity pressure 16 Air holes. These same holes can be used to support each sheet against vertical flow. Clearly, in order to avoid vertical flow during heating, the pressure in the cavity 25 will be kept below the ambient pressure 'while the pressure in the cavity 24 is kept above the ambient pressure. Various forms of pressure base sheet support systems are known in the thermoforming art. An embodiment in this application is to use a beam level sensor on the side of the sheet to detect whether the " bubble " of the sheet interferes with the light beam. Depending on whether the sheet is supported from above or below and which side of the sheet the sensor is on, the controller controls the pressure in the support mold cavity to carry the sheet into an advantageous condition. The improved method of this embodiment is to incorporate a controllable gap between the support cavity and the air chamber, and a minimum pressure (positive or negative) time, so that the " bubble " can be based on the system The hysteresis continuously vibrates through the edge of the beam. Control of this sheet's vertical flow is maintained until the sheet reaches the thermal forming temperature. For ABS plastic, this temperature is generally higher than 14 °. 〇. Other considerations such as the complexity of the shape formed may also require a Chinese paper (CNS) A4 specification (210 x 297 cm) to be applied to the paper size. L -----------, equipment- ------- Order -------- line,-'(Please read the notes on the back before filling out this page) > 10 Printed by A7 B7 Jade, Description of the invention (8) High formation temperature. The total heating time for the sheet will depend on the material, thickness and heater capacity. When using a 2-3mm thick ABS sheet and heating at a certain rate to give effective production without sacrificing sheet properties, the total time generally used for this heating method is 120 seconds, and the sheet There is the advantage of active support in the second half of the total time. Turning now to Section 3, the heater 9 has been retracted and the two mold halves have been brought together for a small area. The pillars 28 between the supporting components 19 of the supporting components u have compressed the springs 13 between the supporting components ′ and the faces 14 and 15 of the mold groove 12 of the mold assembly 10 so that Each support assembly 11 is slightly depressed. In addition, the pressure in the mold cavities M and 25 has now been adjusted, so the positive pressure in the mold cavity 24 has been reduced, and perhaps a vacuum is being applied, At the same time, the vacuum and the mold cavity 25 have been increased. The effect is that the softened thermoplastic sheets 5, 6 can be pulled apart, wherein the closing of the mold has caused a portion 52 of each thermoplastic sheet to the stitched area of its half mold. 17contacts * Now looking at Figure 4, the two mold halves continue to be brought together, and the post 28 further shrinks the spring 13 and at the same time further pushes the support assembly 11. At the same time, in the mold cavity 24 and 25 The vacuum is being increased to pull the thermoplastic sheets into the cavity 16 and thereby begin to form a completed shape, for example a portion 53 of the sheet is now in contact with the inner surface of the cavity. Fixation of the edge 51 Becomes less important now, but it still It is quite reasonable. The edge is firmly fixed. When referring to Figure 5, the two mold halves 1 and 2 have now been brought together completely. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). □) Install -------- order --------- line (please read the precautions on the back before filling this page) 11 407105 A7 B7 V. Description of the invention (9) 'These springs 13 is completely compressed so that the support assemblies ^ are now fully pressed into their respective membrane cavities 12. The continuously applied vacuum in the membrane cavity 16 will cause the respective sheets 5, 6 to be fully drawn into the Inside the film cavity, and thereby conform to the shape of the cavity. The stitching area 17 of the two mold halves 1 and 2 has substantially entered a stitching line formed between the sheets 5 and 6 of thermoplastic material. Within the pillar. The two mold halves 1 and 2 are preferably brought together closer to the bonding thickness of the two sheets in the joint area formed by the area 17 so that the material is forced away from the suture 55 ' A reinforced bead 56 is formed on the inner side of the heat forming portion. Thus, the thermoforming method is basically completed. Now that portion is available Cooled, foamed cocoa is ejected 'The part can be removed and trimmed appropriately. Another way to remove the part from the mold before trimming is to use a device that is trimmed in the mold'. For example, refer to Section 6 One of the knives or cutting blades or a cutter is illustrated in Figures 10 to 10. The stitching area 17 can be incorporated into the mold design as illustrated in Figure 12. In the lower half of the 12th frame, the There is a disengaged component 109 'in the suture area, which can be retracted back into the groove 110 under a pressure sufficient to resist the pre-compressed spring 1 ^. Under the continuous closure of the two mold halves, the upper and lower The individual edges 112 and 113 of the half mold can be trimmed off the flange formed by the part. This action will be further described below with reference to FIGS. 6 to 10. Turning to Figure 6, another embodiment illustrated can accomplish the same goal of eliminating the supporting frame while allowing a single heater to be placed there to heat the thermoplastic sheet, but also by means of a cutter, The dimensions of this paper are applicable to the national standard (CNS) A4 specifications of 117 countries (2〗 〇297297 mm> (Please read the precautions on the back before filling this page). ------ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 12 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 I --- S2___ V. Description of Invention (10) The use of this support that can be pushed down Components to achieve the purpose of in-mold trimming. The value of I is noted that in this embodiment it will provide a single support component that can be pressed down and accomplish the same overall effect. In other words, the upper sheet support assembly 41 in Figs. 6 to 10 can be fixed without substantially changing the operation of the machine. Now looking at Fig. 6, the two mold halves are not substantially the same. The upper mold half 14 has a ring-shaped sheet support assembly 41 which can be pressed down. A groove 42 is inserted, and a spring 45 is placed between the opposite faces 44 and 43 to provide a resilience and resist this depression. The sheet 8 is held by the vacuum groove seal 48, which is via a tube 47 It is evacuated, as in the embodiments shown in Figs. 1 to 5. In the embodiment shown in Fig. 6, the inner surface of the pushable component itself forms part of the cavity. As above For a brief discussion, the component 41 in FIG. 6 can be formed as a whole and is an integral part of the unsustainable part of the mold body without significantly affecting the function of the thermoformer. The sheet support component 41 has a A small suture forming area 49 'protruding from the lower side and adjacent to the vacuum seal 48 holding the edge 80 of the sheet 8 is shown. The effect of this protruding edge is confirmed in the following formula. The lower half The mold 3 has a half mold body 30, and is held in the groove 32 by the sheet support assembly 31. A first spring 35 is formed in the mold cavity 32 to act on the opposite surfaces 33 of the support assembly 3, respectively. And 34 and the body 30. There is an additional spring 36 at the bottom of the groove 32, a Once the support assembly 31 is fully pressed into the trench, it will only act on the faces 34 and 33. Once the support assembly 31 has been fully depressed, the depth of the trench and the branch assembly 31 The height of the additional spring 36 will be touched by the paper rule (CNS) A4 size ⑽χ 297 public love)

i 1! — · Install I (please read the precautions on the back before filling this page)-&13; 407105 V. Description of the invention (11) Please 'and the area where the suture is formed on the plane above it is On the level of the mold surface 26. This reason will be shown in Figure 7-10. The edge 70 of the sheet 7 is fixed by the vacuum seal 38, and is drawn out through the tube 37. The reason is obvious, ‘there is a Caokou in the book Ben Zhao 30 so that the outer edges of the tubes 37 are extended to one side of the support assembly’ to allow the support assembly 3 to be depressed. It is because the use of springs in earlier embodiments can be selected based on their simplicity. Many other methods that allow the sheet support assembly to be pushed down can be used, such as precision mechanical activity, pneumatic support, or hydraulic support. These various possibilities do not depart from the scope of the invention β-in use, a heater can be inserted between the thermoplastic sheets and used to heat the thermoplastics in substantially the same manner as in Fig. 1 Sheet to a heat forming temperature. Further, a method of loading and heating the sheets will be described below with reference to Figs. 13 to 16. Once the heater is removed. The two mold halves 3, 4 are slowly brought to another, while the mold cavities 22, 23 previously used to support the sheets 7, 8 against vertical flow are evacuated to separate the sheets, as in the first The areas 71 and 78 of the sheets are illustrated in FIG. 7. At this stage, because the support components have not yet engaged to push the individual springs 35, 45, neither the components 31 or 41 will begin to be pushed into their individual mold cavities. Now referring to FIG. 8, the heat forming method shown is taken one step further, and the two mold halves 3 and 4 are treated together so that the supporting group of the sheet sees 31 and 41 with the edges 70 and 80 of the individual sheets. The joints are in contact with each other, and at the same time, they are brought into contact with the suture areas 39, 49 of the pushing assemblies 31, 41. The paper size of these films is applicable to Zhongguanjia Standard (CNS) A4 specifications (210 X 297 male f 14 economy " printed by the Intellectual Property Bureau employee consumer cooperative A7 ___B7 V. Description of the invention (12) Continuous extraction of chambers 22 and 23 The vacuum has led to the more advanced formation of the individual sheets, for example, the portion 72 of the underlying thermoplastic sheet is in contact with the mold surface 26. Turning to Figure 9, the method uses continuous movement of the two mold halves Going one step further. The spring 45 between the upper surface 44 of the sheet support assembly 41 and the surface 43 of its individual groove 42 is now fully compressed. The lower surface 34 of the sheet support assembly 31 and its individual The spring 45 between the faces 33 of the groove 32 is now compressed to such an extent that the support member 31 is in contact with another spring in the groove. However, unlike the upper support member 41, the lower support member 31 There are still some effective degrees of freedom for pressing. The heat-formed portion is now more fully formed, the lower sheet is now more fully formed on the mold surface 26, and the upper sheet 82 is almost completely Generated ' The vacuum is applied to complete the task in the remaining small part of the cavity 23. A weld 74 begins to form the area between the joints of the support components 31 and 41. The final stage of this method is explained in the tenth In the figure, the two molds have been taken further together. The upper support assembly 41 has been completely lowered into its individual groove. The lower support assembly 31 is further compressed by the springs 35 The compression of the spring 36 between the surface 34 of the support assembly 31 and the surface 33 of its individual groove 32 is further compressed. That means that the resistance of the springs 35 and 36 has become in the suture area 39 Significant pressure in the joint between 49 and 49 to move the plastic material by the fusion zone 76, and a bead 75 is formed in the inner cavity of the formed component in the fusion zone, and the bead substantially strengthens the joint . Install -------- Order --------- Line (Please read the precautions on the back before filling in this page)

-15-407105 A7

Read the notes on the back and fill in the page II. Order A7 B7. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. A proper seal of the invention (14 90). A typical arrangement for a 3mm ABS sheet 45 mm wide ferrule separated by 50 mm "Referring to Figure 12, the spaced apart clips can be scattered at some points of the joint 103, and the ferrules 107, 108 can be provided on the top ( 105) and the (106) half mold below, so the movement perimeter of the collar of each half mold is not hindered by the collar of the other half mold. Refer to Figure 13 for the The preferred method and device for heating the sheet. Figure 13 illustrates the general method used to form the device as shown in Figure 1. There is a removable heater box 115 that can be used in the upper and lower mold halves. The heater box includes upper and lower heater brackets 117, 118, which support each of the upper and lower sheets, respectively, for loading into the two mold halves. In these There is a heater 121 between the sheets 122, 123. Most There are upper and lower heaters, so that the heating of the upper and lower sheets can be controlled independently according to the influence of the thickness of the sheet. This arrangement allows the heater box to Preheating of the sheets. The heater box can be used as a heater and the sheet ejector, so the time required to heat the sheets can be effectively compared with the time spent on the sheet conveying Overlap. In one method, the sheets can be preheated in the heater box to a temperature determined to be at the glass transition temperature (for example, 7 (rc). If the sheets are already in place, This pre-heating can be performed more slowly, it is best to make sure that it has a smooth heat distribution and penetration to facilitate further heating later. The heater box that handles the sheets is then moved into the second half Position between the molds. At this time, the two mold halves may have been completed— ί I ---- ------- 装 ---- 11 I order ----- II-- line (please (Read the notes on the back before filling out this page)

17 A7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

407105 __B7 _ V. Description of the invention (15) The earlier sequence or cycle of heat formation. The sheets are then transferred to their respective half molds of the sheet support assembly. Once transferred to the respective two mold halves, the support of the sheets can be activated and maintained through the controllable pressure system already described. The heater is used to further heat the brought sheet to a heat forming temperature before being removed from between the two mold halves. In a typical example using the 3mm thickness ABS sheet mentioned earlier, this further heating may take 60 seconds. The heater is then removed and the previously described thermoforming is started. The actual transfer of the sheets includes bringing the two mold halves together to bring each mold half to its respective sheet close to each other or the heater box (or half of its face or half of its bottom), So that the separate halves meet. In another method, the utilization time of the two mold halves in each cycle is additionally reduced, but more complicated tools are required to use the same heater to process different sheets. The heater box itself incorporates an upper Each of the 124 and 125 controllable Meili film cavities each includes a peripheral sheet seal D 126, 127 and a support member in the sealing condition that can hold the sheet thinly. 4 The heater can 'support the upper and lower ones before transferring, and raise the sheet to the thermoforming temperature before the heater box shuttles between the molds. This reduces the time required for the mold in each cycle to allow the number of production cycles to be increased for a given production time. During the transfer, the transfer time is the time during which the support of the sheet is transferred from the pressure film cavity to the film cavity of the mold half. When the size of the sheet is set, hold the -l · — — in a sealed condition, install -------- order --------- line ί. (Please first (Read the notes on the back and fill out this page)

This paper size is in accordance with Chinese National Standard (CNS) A4 specifications (2) 0X 297 public love 1 18 V. Description of the invention (16) Sheets are not very difficult, and the peripheral suction seal described in circle 13 It is quite suitable for support. However, the heat conduction may cause the edges of the sheet to soften more than necessary, and then the seal may be lost due to the deformation of the sheet at the edges. As illustrated in Figure 14 A jacketed ring-based support and transfer system is quite suitable for the heating and transfer methods described above. As illustrated in Figure ^, this arrangement mainly uses a brake control collar 130. The collar 130 is not in the same or sealed assembly. 13 1 direction, but grasp the sheet from its slightly outer side. This allows the collar 130 to operate in the cavity 132, 133 formed in the support assembly of the mold half 134 and the heater box, and It will not be disturbed by the sheet 136 or the seal 131. If using a two-heat formation temperature that will reduce the integrity in the peripheral area, a second clip that is detached before transfer can be used for safety reasons ( Not shown) For the joining of the individual mold halves, an additional cavity 137 may be provided. This clamping arrangement is also suitable for the sheet support assembly of the two mold halves used in the heat forming method of Figure 6 because it overcomes the use Difficult interference caused by the mechanical stainless steel clip arrangement. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs if the different sheet sizes are required, and these sheets are raised to the full heat-forming temperature, Heating of some moon materials is now quite difficult, so a proper perimeter sealing arrangement is needed. However, if the i | _ method is limited to heating only to a temperature below the peeling transfer temperature before transfer, it provides a support In addition, it is possible that the heater box can accommodate different sheet sizes but does not provide a peripheral seal. Examples of such arrangements are shown in Figures 15 and 16. This paper size applies the Chinese National Standard (CNS) A4 specification ( 2】 〇χ297 公 茇) A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 407105 '------------— I _ V. Description of the Invention (17) In FIG. 15, the heater box 140 includes a plurality of suction support rods 141 which are evenly spaced throughout the heater box to support a sheet at most positions on the lower surface of each size or shape. The support The number and space of the rods can be set according to the strength characteristics of the sheet material at the temperature to be transferred. In the 16th stage, the heater box 140 includes most of the automatic loop clips 142, which are suitable for A series of automatic new positioning of the rails 143 inward to the heater box on the wall 144. The movement of the collars will be affected by known linear-acting components, and the collars can essentially be shown in accordance with Figure 14 It is advantageous in a heater box suitable for various sheet sizes, if the heater can be controlled in sections so that it is only in the direction adjacent to the sheet, that is, the heater on which the sheet is placed, The heater is activated. This reduces waste, and also allows the free edge of the grasped sheet to receive additional radiant heat from a heater element that is not below the sheet. When the heater is required to be used in various sheet shapes and sizes, the heater can be formed of many arbitrary belts, for example, a rectangular belt grid, which can be individually controlled. In addition, the belts The shape and structure of the material are particularly suitable for the range of these sheets used. At an organizational level, the present invention may not require an adjustable or different fixing clip composition that is required in traditional forming methods and is required throughout the stroke method. It allows the mold to quickly change and produce parts. Significant flexibility was introduced in a large production range vacuum forming method. _When the pieces are supported by the periphery away from the surface of the mold, they are kept quite soft at the seam area to provide good fusion, because they are located in the fusion. The paper size applies to Chinese specifications ⑵〇x 297 公 楚 * 7

— — — — — — — — — ^ ·! ≪ Please read the notes on the back before filling this page)

V-line. 20 A7 B7 V. Description of the invention (18)

Employees of the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives' Seal #, Yi Zhi then the stitched area of the sheet will immediately contact the stitched area of the mold. The illustrated embodiment of the present invention significantly facilitates the support of the sheet. The changes in the described plan are obvious, and not all changes have been illustrated or mentioned. In any of the forming methods, there are some specific embodiments for fixing the sheet support assembly. These modifications must not depart from the scope of the invention. Component number comparison package I, 2, 3 ... half mold 5 '6 > 8' 82 '90' 122 '123' 136 ... sheet 9 ... radiant heater 10, 30, 134 " half mold assembly II, 91 ... supporting assembly 12 ... annular grooves 13, 36, 35, 45 ... spring 14 ... half mold 15 above ... bottom 16,25 ... membrane cavity 17 ... stitching area 19 ... engaging assembly 20 ... fixing members 22, 23, 24 , 132, 133, 134, 137 ... cavity 26 ... mold surface 28 ... joint 31,41 ... branch assembly 32,42 ... groove 37,47 ... tube 48 ... groove seal 39,49 ... suture formation Area 51 ... Edge 52,53 ... Thermoplastic sheet portion 55 ... Seam line 56,75 ... Bead 74 ... Weld 76 ... Welding area 70, 80 ... Edge f Please read the precautions on the back before filling this page)-line, This paper size applies to China National Standard (CNS) A4 specifications (2) 0 × 297 mm

I 21 4〇7i〇5 A? B7 V. Description of the invention (19) 92, 130 ... 130 Collar 93 ... Central shaft 95 ... Clamp arm 98 ... Brake 99 ... Sealing 100 ... Groove 101 ... Edge 102 ... Support assembly Surface 103 ... joint 107 ... collar 10 9 ... assembly 110 ... groove 11 bu ... spring 112, 113 ... edge 115 ... heater box 117, 118 ... heater bracket 12 bu ... heater 126, 127 ... ·· Sheet seal 140 ··· Heater box 142… Clip 143… Track (please read the precautions on the back before filling this page) -—— ， ^ i ·-\ ---- Order ----- ----- Line- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, the paper size is applicable to China National Standard (CNS) A4 (210x297 mm) 22

Claims (1)

Economic Metropolitan Intellectual Property Bureau Consumption Cooperation Du Duan 407105 ----- 'Scope of Patent Application 4. If a patent is applied for a two-sheet forming device, where the sheet support member includes a φφ reduction region, in the volume of the ㈣ Under sufficient vacuum, the sheets are in contact with each other, and the two mold halves are closed to the closed position to perform substantial bonding, thereby converging the sheet-receiving regions at "" formation- 5. The double sheet forming device according to item 2, 3, or 4 of the scope of patent application, including a member for automatically trimming the stitched area from the formed part, wherein one of the stitched areas It is possible to sacrifice the skin below the level of the half mold adjacent to the stitching area, whereby the other stitching areas cooperate with the half-mould action of the half mold to remove the stitching area. The dual sheet forming device according to item 2, 3, or 4, wherein the sheet support includes an elastic strip protruding from the support plane and a plurality of spaced-apart clip assemblies to press the sheet toward the sheet. Elastic bands, these clip sets The interval can be close enough to a continuous seal between the sheet and the elastic strip. 7. The device according to the scope of patent application item !, which includes a heater member and a heater moving member When the two mold halves are separated, the heater member between the two mold halves is adapted to heat the double sheet therebetween. 8. The device according to item 7 of the scope of patent application, wherein the heater member is included in the device. Sheet support members above and below to hold each sheet above and below, so that when the heater should be in the position between the two mold halves, the sheets can be transferred to the Individual please read and read the note before %% binding on this page -twenty four - An apparatus for a two-piece thermoformed material, comprising: (please read the note ^ on the back before filling out this page)-relative movement between an open position and a closed position during the thermoforming method Opposite mold halves, along with the sheet support members of each mold half, each mold sheet pushing member is connected to its opposite mold half, and is configured to grasp a thermoplastic sheet from the edge of a dagger The sheet supporting members are structured such that when the halves are in their open positions, they will grasp individual sheets to be separated from the other. Each half mold, its opposite supporting member, and a sheet The sheets fixed in position by the support members together define a pressurized volume. 2. As in the dual sheet forming device of the scope of application for patent i, one or more of the sheet supporting members can be opposed to each other under the pressure of the supporting member and the other supporting members or mold halves. The half mold is moved, thereby depressing the supporting member against its individual half mold. Economy. Printed by the Consumer Cooperative of the Intellectual Property Bureau. 3. If the double sheet forming device of the second patent application scope, the two supporting members can be moved to each other's joint, and the joint member is based on the sheet. The material supporting member is engaged to maintain the separation between the sheets, and the two sheet supporting members become depressed relative to their individual mold halves, so that the mold halves are moved to their closed positions, so that each January Village will be in contact with the stitched formed area of its individual mold halves, and as the mold halves are further moved to the closed position, the areas of the sheet will be in contact with the fusion molded portion of the mold halves And they are brought into contact by themselves and are pressed together to form a suture by the closing of the two mold halves. ”This paper recognizes Guanguan County (CNS) A4% ^ iqx297M} --------- -23-407105 2. The size of the patent application sheet to act. A method for thermoforming a double sheet material, comprising: holding a heated thermoplastic sheet on each of the double mold halves in a manner to provide a sealed volume between the sheet and the mold half ^ simultaneously controlled There is a difference in air force between the space sealed between each other moon and its individual mold half to avoid vertical flow of each sheet, and the pressure difference should be changed to ensure that the There is minimal space between the materials, and only the desired part is in contact with each other to form a suture between them. The two mold halves are moved toward each other, and at the same time, the effect of the poor house force is increased, resulting in each sheet. Fixing itself in a ring-shaped welding area, and continuously holding the two halves together to cause the welding area to close together, thus creating a suture in the welding area. 15. For the method of applying for the scope of patent No. 14, the steps include: > Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Health t ~ Preheat the sheets on each side of a removable heater box , Transferring the sheets to the two mold halves, and removing the heater box from the two mold halves. 16. The method of claim 15 in which the preheating of the sheets is restricted, the heating is inadequate such that the temperature of the sheets cannot reach their peel transfer temperature, and the The method includes further heating the sheets to a forming temperature after the sheets are transferred to the two mold halves before being removed from the heater box. 17. The method according to item 16 of the patent application, wherein the sheets are The pre-heated paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -26 A8 B8 C8 D8 The sheet supporting member of the scope of patent application. 9. A device as claimed in claim 8 wherein the heater member includes upper and lower pressure chambers and a pressure supply path to allow application of-individually controlled pressure to each of the upper and lower chambers. Moreover, each of the upper and lower support members of the heater can accommodate the sheet and the surrounding seals so that each of the sheets is close to each of the mold cavities. 10. The device according to claim 8 or claim 9, wherein the sheet supporting member of the heater member includes a plurality of spaced apart element assemblies and a clip surface accompanied by the merger, the heater member The clip assembly is placed around the periphery of the sheet between the positions of the clip assembly of the half-mold sheet support member. U. The device according to item 10 of the scope of patent application, wherein at least some of the clip components of the heater member can be automatically moved to operate in various positions, so that the device is combined with other clip components. — 'So that they are used to grasp different sized sheets. 12. The device according to item 8 of the patent application, wherein the sheet support member includes a suction support member and a non-mold surface on which the sheet is sucked, and the entire heater member is dispersed so that it can grasp different Size sheet. 13. The device according to item u of the patent application, wherein the heater member includes a plurality of heater elements 'the heater elements are arranged in a region' and the regions of the heater elements are connected to control Control member, in which the areas of these heater elements are heated according to --------- < * ^ ------- order ------ line U (please read the back first (Please note this page before filling out this page.) 25 Μ C8 ~ -------- —____ D8 Patent application pressure ~~-At the same time, compensation for the pressure introduced and maintained in the space between each sheet and the heater box, until borrowed Each sheet is fully supported against vertical flow by the space between the each sheet and the opposing mold halves, and each sheet is released by the heater box. 22. The method according to any one of claims 14 to 21 of the scope of patent application, which includes bringing the two mold halves closer together and the suture present area can be compared with its opposite mold half, its relative mold half The stitched area can be trimmed together with the other stitched area from the formed part by a cutting action. 3. · A device for two-sheet thermoformed material, in which each-half mold incorporates a-sheet supporting member during heating, which can grasp the-sheet and support the sheet at the same time, At least one of the sheet support members may be retracted during thermoforming. -II-In! ---- I- I —H ih (Please read the precautions on the back before filling in this J) Printed by the Intellectual Property Bureau Staff Consumer Cooperatives This paper is from China Post (21 (^ 297 公 董) 28 A8 B8 C8 ---- D8, patent application Gu 7 χ 〇5 is enough to make the sheets reach their forming temperature, and the method includes the following steps: The cavity between the upper sheet and the heater box is maintained in a righteous manner, and the cavity between the lower sheet and the heater box is maintained at a negative pressure. The method of item 14 wherein the steps of transferring the sheets include: bringing the heater box between the two mold halves, bringing each mold half together with a heater member relative to it, until A supporting member on the half mold contacts the opposite sheet, and grasps each sheet and the opposite supporting member. 19. The method of claim 18 in the scope of patent application, wherein each of the half molds is contacted with The step of joining together with respect to its heater member includes attaching the two mold halves to each other. 》 20. The method according to item 18 of the patent application scope, wherein the step of bringing each mold half together with the heater member relative to it separates the upper and lower sheet supports of the heater member. The method of the eighteenth aspect of the method, the step of transferring the sheet further includes the step of: maintaining a sufficient space between the each sheet and the heater box to support each sheet with resistance to vertical flow. Controlled pressure is introduced into the space between each sheet and the opposing mold half as soon as the opposing support members have held the sheet—subjected to the application of this paper from the applicable Chinese National Standard (CNS) Secretary (2 number 297 public directors) (Please read the precautions on the back before filling out this page) Order Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 27