TWI741801B - Die for forming irregular bellow - Google Patents

Abstract

The present invention discloses a die that enables a tube to be formed into an irregular bellow by a fixed die and a movable die. The movable die is able to be moved toward the fixed die such that an extrusion cavity having variable gap exists between the fixed and movable dies. During hydroforming process, a first curve is formed on the tube in a forming cavity of the movable die and a pre-curve is formed on the tube in the extrusion cavity. The fixed and movable dies are provided to compress the pre-curved into a second curve having a shape different from that of the first curve.

Description

Forming die for special-shaped corrugated pipe

The invention relates to a tube processing forming mold, in particular to a forming mold for forming a tube with special-shaped corrugations.

In manufacturing industries such as automobiles, motorcycles, bicycles, sanitary equipment, and machinery, pipes are designed to be corrugated due to the appearance or function (such as lightweight, rigidity, shock absorption, etc.) requirements.

In order to make the pipe corrugated, a pipe is put into a mold using a hydroforming method, and after the hydraulic oil is injected, the pipe is swollen and expanded to a cavity of the mold, so that the pipe is corrugated. However, when the shape of the corrugation of the pipe is more complicated due to requirements, for example, when the pipe is formed with different shapes of corrugations, the cavity design of the hydroforming mold and the swelling (such as pipe thickness, ductility, etc.) factors of the pipe, It will affect whether the pipe can form corrugations of different shapes in the hydroforming process, especially when the corrugation shape is very different, it is easy to cause the pipe to produce wrinkling, buckling and buckling during the hydroforming process. Bursting and other issues.

The main purpose of the present invention is to form a pipe into a corrugated pipe with different corrugated shapes in a hydroforming process by a forming die of a special-shaped corrugated pipe.

The present invention provides a forming mold for special-shaped corrugated pipes, which is used to form a pipe into a corrugated pipe with different corrugated shapes. The forming mold includes a first mold set and a second mold set. The first mold set includes A first base, at least one first fixed mold, and at least one first movable mold. The first base has a first body and a first accommodating groove. Along a first axis, the first accommodating The recess is recessed in the first body, the first fixed mold is fixed to the first base, and the first movable mold is movably set in the first accommodating recess and along the first axial direction, the The first movable mold is selectively moved toward or away from the first fixed mold, so that there is a first extrusion molding cavity with a variable gap between the first movable mold and the first fixed mold. The mold has a first surface and at least one first groove recessed on the first surface. The first groove has a first molding cavity for accommodating the pipe. The two mold sets move toward the first mold set along a second axial direction intersecting the first axial direction. The second mold set includes a second base, at least one second fixed mold, and at least one second movable mold, The second base has a second body and a second accommodating groove. Along the first axial direction, the second accommodating groove is recessed in the second body, and the second fixed mold is fixed to the second Base, the second movable mold is movably arranged in the second accommodating groove, and along the first axial direction, the second movable mold selectively moves toward or away from the second fixed mold, so that the second movable mold There is a second extrusion molding cavity with a variable gap between the two movable molds and the second fixed mold. The second movable mold has a second surface and at least one second groove recessed on the second surface , The second surface faces the first surface of the first movable mold, the second groove has a second molding cavity, and the second molding cavity is used for accommodating the pipe. In a hydroforming process, The first molding cavity and the second molding cavity are used for forming a first tube corrugation on the pipe, and forming a first pipe corrugation for the pipe in the first extrusion molding cavity and the second extrusion molding cavity When the first movable mold and the second movable mold move along the first axial direction toward the first fixed mold and the second fixed mold, the to-be-formed corrugation is moved by the first fixed mold and the second fixed mold The first movable mold, the second fixed mold, and the second movable mold are extruded into a second tube bellows, and the shape of the second tube bellows is different from the shape of the first tube bellows.

The present invention provides a forming mold for a special-shaped corrugated pipe, which is used to form a pipe into a corrugated pipe with different corrugated shapes. The forming mold includes at least one fixed mold and a movable mold, and the movable mold is selectively oriented toward the fixed The mold moves so that there is an extrusion molding cavity with a variable gap between the movable mold and the fixed mold. The movable mold has a molding cavity for accommodating the pipe and forming a hydroforming cavity. In the manufacturing process, the molding cavity is used to form a first tube corrugation on the tube, and the tube is formed into a corrugation to be molded in the extrusion molding cavity, and the fixed mold and the movable mold are used to form the corrugation to be molded. The corrugation is extruded into a second tube corrugation, and the shape of the second tube corrugation is different from the shape of the first tube corrugation.

The present invention uses the molding cavity of the movable mold and the extrusion molding cavity located between the movable mold and the fixed mold to expand and expand the tube to the molding mold during the hydroforming process The first tube corrugation and the corrugation to be formed are formed in the cavity and the extrusion molding cavity, and the corrugation to be formed is extruded by the movable die and the fixed die, so that the corrugation to be formed is extruded into the The second tube is corrugated, so that the tube is formed into a corrugated tube with special-shaped corrugations, which can avoid the wrinkles caused by the formation of different shapes of corrugations in the hydroforming process only by the cavity design of the hydroforming mold. ), Buckling and Bursting.

Please refer to Figures 1 to 5, a forming mold 10 for a special-shaped corrugated tube for forming a tube material O into a corrugated tube with different corrugated shapes. The forming mold 10 includes a first mold set 100 and a second mold Set 200, the tube O is arranged between the first mold set 100 and the second mold set 200. Please refer to Figures 2 to 5. In this embodiment, two punches are used to block the two tubes of the tube O.口, the two punches are respectively a blocking punch 20 and a liquid supply punch 30. In a hydroforming process, a pipeline 31 of the liquid supply punch 30 will remove hydraulic oil (not shown) Filling in the tube O, this embodiment does not limit the shape of the punch and the way of filling hydraulic oil.

Referring to FIGS. 1 to 5, the first mold set 100 includes a first base 110, at least one first fixed mold 120, and at least one first movable mold 130. The first base 110 has a first body 111 And a first accommodating groove 112, along a first axis X, the first accommodating groove 112 is recessed in the first body 111, in this embodiment, along a line intersecting the first axis X A second axis Y. The first fixed mold 120 is fixed to the first base 110. Please refer to Figures 1, 4 and 6. In this embodiment, the first fixed mold 120 has a first limit. Portion 121 and at least one first fixing portion 122. The first fixing mold 120 is fixed to the first body 111 by the first fixing portion 122. Preferably, the first body 111 has at least one first slot 111a, The first fixed mold 120 is embedded in the first slot 111a with the first fixed portion 122, which can be replaced with another first fixed mold 120 according to the process requirements.

Please refer to Figures 1, 4, 5, and 6, the first movable mold 130 is movably disposed in the first accommodating groove 112, and along the first axis X, the first movable mold 130 is selectively Move toward or away from the first fixed mold 120, so that there is a first extrusion molding cavity 140 with a variable gap between the first movable mold 130 and the first fixed mold 120 (see FIGS. 5 and 6) ). In this embodiment, the first extrusion molding cavity 140 is located between the first limiting portion 121 and the first movable mold 130. Please refer to Figures 1, 4, 6, and 7, preferably The first mold set 100 further includes at least one first elastic member 150. Please refer to FIG. 7. A first end 151 of the first elastic member 150 is used to resist the first fixed mold 120. The first elastic member A second end 152 of 150 is used to resist the first movable mold 130. In this embodiment, the first movable mold 130 has a first side surface 133 and at least one first container recessed on the first side surface 133. The first side surface 133 faces the first fixed mold 120, the first elastic member 150 is disposed in the first accommodating hole 134, and the first end 151 of the first elastic member 150 protrudes The first side surface 133.

Please refer to Figures 1, 2 and 4. In this embodiment, the first base 110 has a first guiding member 113. Along the first axial direction X, the first guiding member 113 is disposed on the In the first accommodating groove 112, the first movable mold 130 has a guiding groove 135, the first movable mold 130 is movably coupled to the first guiding member 113 by the guiding groove 135, and the first The guiding member 113 and the guiding groove 135 can prevent the first movable mold 130 from moving biased. Preferably, the first fixed mold 120 has a recessed groove 123, and the first fixed mold 120 has a recess The groove 123 straddles the first guiding member 113, and the first limiting portion 121 of the first fixed mold 120 is located above the first guiding member 113.

Referring to FIGS. 1 to 6, the first movable mold 130 has a first surface 131 and at least one first groove 132 recessed on the first surface 131, and the first groove 132 has a first forming mold The first molding cavity 132a is used for accommodating the tube O. In this embodiment, the first fixed mold 120 has a first supporting groove 124, and the first supporting groove 124 is used for accommodating The tube O, and the tube O is straddled on the first fixed mold 120.

Please refer to Figures 1 to 5, the second mold set 200 moves along the second axis Y toward the first mold set 100, and the tube O is sandwiched between the first mold set 100 and the second mold set 200, the second mold set 200 includes a second base 210, at least one second fixed mold 220, and at least one second movable mold 230. The second base 210 has a second body 211 and a second The accommodating groove 212 is recessed in the second body 211 along the first axis X, and in this embodiment, along the second axis Y, the second fixed mold 220 is fixed to the second base 210. Please refer to Figures 1, 4 and 9. In this embodiment, the second fixed mold 220 has a second limiting portion 221 and a first at least one second fixing portion 222 The second fixing mold 220 is fixed to the second body 211 by the second fixing portion 222. Preferably, the second body 211 has at least one second slot 211a, and the second fixing portion 222 is embedded in the second body 211. The second slot 211a can be replaced with another second fixed mold 220 according to the manufacturing process requirements.

Please refer to Figures 1, 4, 5, 8 and 9, the second movable mold 230 is movably disposed in the second accommodating groove 212 and along the first axis X, the second movable mold 230 selects Move toward or away from the second fixed mold 220, so that there is a second extrusion molding cavity 240 with a variable gap between the second movable mold 230 and the second fixed mold 220 (please refer to Sections 5 and 9). Figure). In this embodiment, the second extrusion molding cavity 240 is located between the second limiting portion 221 and the second movable mold 230. Please refer to Figures 1, 4, 7, 8 and 9, Preferably, the second mold set 200 further includes at least one second elastic member 250. Please refer to FIG. 7. A first end 251 of the second elastic member 250 is used to resist the second fixed mold 220. A second end 252 of the two elastic members 250 is used to abut against the second movable mold 230. In this embodiment, the second movable mold 230 has a second side surface 233 and at least one recessed side surface 233. The second accommodating hole 234, the second side surface 233 faces the second fixed mold 220, the second elastic member 250 is disposed in the second accommodating hole 234, and the first end 251 of the second elastic member 250 Protruding from the second side surface 233.

Please refer to Figures 1, 2, 4, and 8, the second base 210 has a second guide 213 along the first axis X, the second guide 213 is disposed in the second accommodating In the groove 212, the second guide 213 has a first limiting end 213a, the first limiting end 213a is exposed in the second accommodating groove 212, and the second movable mold 230 has a joining end 235. Along the first axis X, the second movable mold 230 is movably coupled to the first limiting end 213a of the second guide 213 with the coupling end 235, and is along the second In the axial direction Y, the second base 210 uses the second guide 213 to drive the second movable mold 230. The second guide 213 can prevent the second movable mold 230 from moving biased. In this embodiment, The second limiting portion 221 of the second fixed mold 220 is located below the second guide member 213, and the second base 210 has an engaging groove 214. Along the first axial direction X, the engaging groove 214 Recessed in the second accommodating groove 212, the second guiding member 213 has a second limiting end 213b, and the second limiting end 213b is movably coupled to the engaging groove 214 along the second In the axial direction Y, the second base 210 drives the second guide 213.

Please refer to Figures 1, 4 and 8, the second movable mold 230 has a second surface 231 and at least one second groove 232 recessed on the second surface 231, the second groove 232 has a second A molding cavity 232a, the second surface 231 faces the first surface 131 of the first movable mold 130, and the second molding cavity 232a is used for accommodating the tube O. In this embodiment, the second fixed mold 220 There is a second supporting groove 223 for accommodating the tube O, and the tube O straddles the second fixed mold 220, along the second axial direction Y, the first The supporting groove 124 and the second supporting groove 223 are located on two opposite sides of the tube O.

Please refer to FIGS. 5 and 7. In this embodiment, the forming mold 10 includes a first mold base 300, a second mold base 400, at least one first gasket 500, and at least one second gasket 600. The first mold base 300 has a first compartment 310, the first mold group 100 is disposed in the first compartment 310, the second mold base 400 has a second compartment 410, and the second mold group 200 is disposed in the In the second compartment 410, the first gasket 500 is disposed between the first movable mold 130 and a side wall 311 of the first compartment 310, and the first movable mold 130 is located between the first elastic member 150 and the second Between a gasket 500, the second gasket 600 is disposed between the second moving mold 230 and a side wall 411 of the second compartment 410, and the second moving mold 230 is located between the second elastic member 250 and the Between the second gasket 600.

Referring to FIGS. 5 and 7, the first movable mold 130 is made to abut against the first gasket 500 by the elastic force of the first elastic member 150, and the second movable mold is caused by the elastic force of the second elastic member 250 230 interfere with the second gasket 600 to avoid displacement of the first movable mold 130 and the second movable mold 230 before actuation, and by replacing the first gasket 500 and the second gasket 600, Before the first movable mold 130 and the second movable mold 230 are actuated, adjust the variable gap of the first extrusion molding cavity 140 between the first movable mold 130 and the first fixed mold 120 The width, and the width of the variable gap of the second extrusion molding cavity 240 adjusted between the second movable mold 230 and the second fixed mold 220.

Please refer to Figures 2, 3, and 5. In this embodiment, the first movable mold 130 and the second movable mold 230 are pushed by the blocking punch 20 and/or the liquid supply punch 30, and respectively Move toward the first fixed mold 120 and the second fixed mold 220 to reduce the width of the variable gap of the first extrusion molding cavity 140 and reduce the variable gap of the second extrusion molding cavity 240 The width.

Please refer to Figures 10A to 10D, which are schematic diagrams of the operation of the present invention. First, refer to Figure 5. The tube O is set between the first mold set 100 and the second mold set 200. Please refer to section 5. And 10A, the pipe O is accommodated in the first groove 132 of the first movable mold 130 and the second groove 232 of the second movable mold 230, and the pipe O is located in the first fixed mold 120 Between the second fixed mold 220 and the second fixed mold 220, the two nozzles of the pipe O are blocked by the blocking punch 20 and the liquid supply punch 30, respectively. The first movable mold 130 and the second movable mold 230 are not blocked by the Before the blocking punch 20 and/or the liquid supply punch 30 are pushed, the first extrusion molding cavity 140 has a first gap L1, and the second extrusion molding cavity 240 has a second gap L2. In the embodiment, the width of the first gap L1 and the width of the second gap L2 are substantially the same, but it is not limited thereto.

Next, referring to Figure 10B, a hydroforming process is performed. In this embodiment, a hydraulic oil is filled into the pipe O through the liquid supply punch 30, so that a pipe wall O3 of the pipe O is swollen and moved toward The first molding cavity 132a, the second molding cavity 232a, the first extrusion molding cavity 140, and the second extrusion molding cavity 240 expand, and the tube wall O3 is connected to the first molding cavity 132a A first tube corrugation O1 is formed with the second molding cavity 232a, and the tube wall O3 is formed with a to-be-formed corrugation OX in the first extrusion molding cavity 140 and the second extrusion molding cavity 240.

Next, referring to Figures 10C and 10D, along the first axis X, the blocking punch 20 and/or the liquid supply punch 30 push the first movable mold 130 and the second movable mold 230 toward the The first fixed mold 120 and the second fixed mold 220 move, so that the width of the first gap L1 and the width of the second gap L2 are reduced, and the first fixed mold 120, the first movable mold 130, and the second The two fixed molds 220 and the second movable mold 230 extrude the to-be-formed corrugation OX, so that the to-be-formed corrugation OX is extruded into a second tube corrugation O2, and the shape of the second tube corrugation O2 is different from the first tube corrugation O2. The shape of a tube corrugated O1.

In the present invention, the first molding cavity 132a and the second molding cavity 232a of the movable mold 130 are used to inflate and expand the tube O to the first molding cavity 132a and the second molding cavity 232a during the hydroforming process. A molding cavity 232a is formed to form the first tube corrugation O1, and the first extrusion molding cavity 140 and the second extrusion molding cavity 240 are used to inflate and expand the tube O during the hydroforming process The first extrusion molding cavity 140 and the second extrusion molding cavity 240 are used to form the to-be-formed corrugation OX, and the first fixed mold 120, the first movable mold 130, and the second fixed mold The mold 220 and the second moving mold 230 extrude the to-be-formed corrugation OX into the second tube corrugation O2, so that the tube material O is formed into a corrugated tube with special-shaped corrugations.

The scope of protection of the present invention shall be determined by the scope of the attached patent application. Anyone who is familiar with the art and makes any changes and modifications without departing from the spirit and scope of the present invention shall fall within the scope of protection of the present invention. .

10: Forming mold

20: Blocking the punch

30: Liquid supply punch

31: Pipeline

100: The first mold group

110: The first base

111: The first body

111a: first slot

112: The first accommodating slot

113: The first guide

120: The first fixed mold

121: The first limit

122: The first fixed part

123: Gap Groove

124: The first support groove

130: The first mobile mold

131: First Surface

132: The first groove

132a: The first molding cavity

133: first side

134: The first accommodating hole

135: Guide groove

140: The first extrusion molding cavity

150: The first elastic part

151: first end

152: second end

200: The second mold group

210: second base

211: The Second Body

211a: second slot

212: second holding tank

213: second guide

213a: The first limit end

213b: second limit end

214: Joint Groove

220: The second fixed mold

221: second limit

222: The second fixed part

223: second support groove

230: The second mobile mold

231: second surface

232: second groove

232a: The second molding cavity

233: second side

234: second accommodating hole

235: Joint end

240: The second extrusion molding cavity

250: second elastic part

251: first end

252: second end

300: The first mold base

310: First cabin

311: Sidewall

400: second mold base

410: second cabin

411: Sidewall

500: The first gasket

600: second gasket

L1: first gap

L2: second gap

O: Pipe

O1: The first tube corrugated

O2: second tube corrugated

O3: Tube wall

OX: to be formed corrugated

X: first axis

Y: second axis

Figure 1: An exploded perspective view of the first mold set and the second mold set of the present invention.

Figure 2: An exploded perspective view of the first mold set and the second mold set of the present invention.

Figure 3: A perspective view of the first mold set and the second mold set of the present invention.

Fig. 4: An exploded perspective view of a molding die for a special-shaped corrugated pipe of the present invention.

Fig. 5: A cross-sectional view of the forming die of the special-shaped corrugated pipe of the present invention.

Figure 6: A top view of the first mold set of the present invention.

Fig. 7: A cross-sectional view of the forming die of the special-shaped corrugated pipe of the present invention.

Figure 8: An exploded perspective view of the second mold set of the present invention from another perspective. .

Figure 9: Bottom view of the second mold set of the present invention.

Figures 10A to 10D: schematic diagrams of the operation of the forming die for the special-shaped corrugated pipe of the present invention.

10: Forming mold

100: The first mold group

110: The first base

111: The first body

111a: first slot

112: The first accommodating slot

113: The first guide

120: The first fixed mold

122: The first fixed part

124: The first support groove

130: The first mobile mold

131: First Surface

132: The first groove

132a: The first molding cavity

200: The second mold group

210: second base

211: The Second Body

211a: second slot

212: second holding tank

213: second guide

213a: The first limit end

213b: second limit end

220: The second fixed mold

222: The second fixed part

230: The second mobile mold

231: second surface

232: second groove

232a: The second molding cavity

500: The first gasket

600: second gasket

O: Pipe

X: first axis

Y: second axis

Claims (14)

A forming mold for special-shaped corrugated pipes is used to form a pipe into a corrugated pipe with different corrugated shapes. The forming mold includes: A first mold group, including: A first base having a first body and a first accommodating groove, and along a first axial direction, the first accommodating groove is recessed in the first body; At least one first fixed mold fixed to the first base; and At least one first movable mold is movably disposed in the first accommodating groove, and along the first axial direction, the first movable mold selectively moves toward or away from the first fixed mold, so that the first There is a first extrusion molding cavity with a variable gap between the movable mold and the first fixed mold, and the first movable mold has a first surface and at least one first groove recessed on the first surface , The first groove has a first molding cavity, and the first molding cavity is used for accommodating the pipe; and A second mold set moves toward the first mold set along a second axial direction intersecting the first axial direction, and the second mold set includes: A second base having a second body and a second accommodating groove, and along the first axial direction, the second accommodating groove is recessed in the second body; At least one second fixed mold fixed to the second base; and At least one second movable mold is movably arranged in the second accommodating groove, and along the first axial direction, the second movable mold selectively moves toward or away from the second fixed mold, so that the second There is a second extrusion molding cavity with a variable gap between the movable mold and the second fixed mold, and the second movable mold has a second surface and at least one second groove recessed on the second surface, The second surface faces the first surface of the first movable mold, and the second groove has a second molding cavity for accommodating the tube. In a hydroforming process, the The first molding cavity and the second molding cavity are used to form a first tube corrugation on the pipe, and make the pipe form a waiting cavity in the first extrusion molding cavity and the second extrusion molding cavity. When the first movable mold and the second movable mold move toward the first fixed mold and the second fixed mold along the first axial direction, the to-be-formed corrugation is controlled by the first fixed mold and the second fixed mold. Two fixed molds, the first mobile mold and the second mobile mold are extruded into a second tube corrugation, and the shape of the second tube corrugation is different from the shape of the first tube corrugation. For example, the forming mold of the special-shaped corrugated pipe of claim 1, wherein the first fixed mold has a first supporting groove, and the first supporting groove is used for accommodating the pipe. For example, the forming mold of the special-shaped corrugated pipe of claim 1, wherein the second fixed mold has a second limiting portion and a first at least one second fixed portion, and the second extrusion molding cavity is located at the second limiting portion Between the second movable mold and the second fixed mold, the second fixed mold is fixed to the second body by the second fixed portion. For example, the forming mold of the special-shaped corrugated pipe of claim 3, wherein the second body has at least one second slot, and the second fixing part is embedded in the second slot. For example, the forming mold of the special-shaped corrugated pipe of claim 1, wherein the second base has a second guide member, and the second guide member is disposed in the second accommodating groove along the first axial direction, The second guide member has a first limiting end, the first limiting end is exposed in the second accommodating groove, and the second movable mold has a joining end along the first axial direction, The second movable mold is movably coupled to the first limiting end of the second guide by the coupling end, and along the second axial direction, the second base uses the second guide Drive the second mobile mold. For the forming mold of the special-shaped corrugated pipe of claim 5, the second base has an engaging groove, and the engaging groove is recessed in the second accommodating groove along the first axial direction, and the second guide member There is a second limiting end, the second limiting end is movably coupled to the engaging groove, and along the second axial direction, the second base drives the second guide member. For example, the forming mold of the special-shaped corrugated pipe of claim 1, wherein the second base has a second guide member, and the second guide member is disposed in the second accommodating groove along the first axial direction, A second limiting portion of the second fixed mold is located below the second guide member. For example, the forming mold of the special-shaped corrugated pipe of claim 2, wherein the second fixed mold has a second supporting groove, and the second supporting groove is used for accommodating the pipe, and along the second axial direction, the first A supporting groove and the second supporting groove are located on two opposite sides of the pipe. According to claim 1, the forming mold of the special-shaped corrugated pipe, wherein the second mold set further includes at least one second elastic member, and a first end of the second elastic member is used to abut against the second fixed mold, and the second elastic A second end of the part is used to resist the second moving mold. The forming mold of the special-shaped corrugated tube of claim 9, wherein the second movable mold has a second side surface and at least one second receiving hole recessed on the second side surface, and the second side surface faces the second fixed mold , The second elastic element is disposed in the second accommodating hole, and the first end of the second elastic element protrudes from the second side surface. For example, the forming mold of the special-shaped corrugated pipe of claim 9, which further includes a second mold base and at least one second gasket, the second mold base has a second compartment, and the second mold set is arranged in the second compartment In this case, the second gasket is disposed between the second moving mold and a side wall of the second compartment, and the second moving mold is located between the second elastic member and the second gasket. A forming mold for special-shaped corrugated pipes is used to form a pipe into a corrugated pipe with different corrugated shapes. The forming mold includes: at least one fixed mold; and a movable mold, selectively moving toward the fixed mold to make The mobile mold and the fixed mold There is an extrusion molding cavity with a variable gap between them. The movable mold has a molding cavity for accommodating the pipe. In a hydroforming process, the molding cavity is used for making the pipe A first tube corrugation is formed, and the tube is formed with a corrugation to be formed in the extrusion mold cavity, the fixed mold and the movable mold are used to extrude the corrugation to be formed into a second tube corrugation, and The shape of the second tube corrugation is different from the shape of the first tube corrugation. For example, the forming mold of the special-shaped corrugated tube of claim 12 further includes at least one elastic member, a first end of the elastic member is used to resist the fixed mold, and a second end of the elastic member is used to resist the moving mold. For example, the forming mold of the special-shaped corrugated pipe of claim 13, which further includes a mold base and at least one gasket. Between a side wall of the cabin, and the movable mold is located between the elastic member and the gasket.

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