Anti-loosening injection mold for processing automotive trim plastic part

Abstract

The invention relates to the technical field, in particular to an automobile interior plastic part machining anti-loosening injection mold which comprises a bottom plate, a lower mold body and an upper mold body, a mounting plate is arranged on the bottom plate, a pushing mechanism for driving the mounting plate to move up and down is arranged between the bottom plate and the mounting plate, the lower mold body is connected to the mounting plate, and the upper mold body is arranged above the lower mold body. A lifting assembly is arranged on the mounting plate, a first die cavity and a second die cavity are formed in the lower die and the upper die respectively, an inserting block is arranged on the lower die, a groove for the inserting block to be clamped in is formed in the upper die, a sealing gasket is attached to the inserting block, and a sealing groove for the sealing gasket to be extruded and clamped in is formed in the upper die. The upper mold is connected with an injection molding pipe and a vacuumizing pipe, the injection molding pipe and the vacuumizing pipe both communicate with the interior of the second mold cavity, and a clamping assembly is further arranged on the mounting plate. The injection mold has the effect that the problem of injection liquid leakage in the injection molding process of the injection mold is solved.

Description

Technical Field

[0001] The invention relates to the field of injection mold technology, in particular to an anti-loosening injection mold for processing automobile interior plastic parts. Background Art

[0002] The automotive interior system is an important part of the car body, and the design workload of the interior system accounts for more than 60% of the car styling design workload, far exceeding the car's appearance. It is one of the most important parts of the car body. Each vehicle manufacturer usually has a large automotive interior team to complete a large amount of engineering work related to the interior. The body design is divided into two parts: styling design and engineering design. In engineering design, the design workload of the white body is the largest, followed by the design of the interior system, and the design of the body exterior covering parts is ranked last. This may be something that ordinary people or non-industry insiders have not thought of. The automotive interior mainly includes the following subsystems: instrument panel system, sub-instrument panel system, door inner panel system, ceiling system, seat system, pillar panel system, other cab interior parts system, cab air circulation system, trunk interior parts system, engine compartment interior parts system, carpet, seat belts, airbags, steering wheel, as well as interior lighting, interior acoustic system, etc.

[0003] When producing automobile interior plastic parts, injection molding and polishing are required; however, when the injection molds on the market are used to inject large automobile interior plastic parts, due to the large size of the interior, the injection liquid will leak during the injection molding process. Summary of the invention

[0004] In order to improve the problem of injection liquid leakage during the injection molding process, the present application provides an anti-loosening injection mold for processing automobile interior plastic parts.

[0005] The present application provides an anti-loosening injection mold for automobile interior plastic parts, which adopts the following technical solution:

[0006] A loose-proof injection mold for processing automobile interior plastic parts comprises a bottom plate, a lower mold and an upper mold, wherein a mounting plate is arranged on the bottom plate, the mounting plate and the bottom plate are arranged parallel to each other, a pushing mechanism for driving the mounting plate to move up and down is arranged between the bottom plate and the mounting plate, the lower mold is connected to the mounting plate, the upper mold is arranged above the lower mold, a lifting assembly for driving the upper mold to move up and down is arranged on the mounting plate, a first mold cavity and a second mold cavity are respectively provided on the lower mold and the upper mold, a plug-in block is provided on the lower mold, the plug-in block is located on the surface of the lower mold facing the upper mold, the plug-in block is arranged along the circumference of the lower mold, the cross-section of the plug-in block is arranged in a trapezoidal shape, a groove for the plug-in block to be inserted into the upper mold is provided on the upper mold, a sealing gasket is attached to the plug-in block, a sealing groove for the sealing gasket to be squeezed and inserted into the upper mold is provided on the upper mold, an injection tube and a vacuum tube are respectively connected to the upper mold, the injection tube and the vacuum tube are both connected to the second mold cavity, and a clamping assembly for clamping the lower mold and the upper mold is also provided on the mounting plate.

[0007] Preferably, the pushing mechanism includes a supporting telescopic rod, a bearing seat, a rotating rod, a cam, a connecting rod, a movable block, a push rod, a fixed seat and a driving motor, the supporting telescopic rod is connected between the base plate and the mounting plate, the supporting telescopic rod is arranged in a direction perpendicular to the base plate, one of the supporting telescopic rod is respectively arranged at the four corners of the base plate, the bearing seat is connected to the base plate, two of the bearing seats are arranged on the base plate, the rotating rod is connected to the bearing seat, one of the rotating rods is respectively arranged on each bearing seat, the axes of the two rotating rods are arranged in a colinear manner, the cam is connected to the rotating rod, one of the cams is respectively arranged at the opposite ends of the two rotating rods, the two cams are arranged relatively parallel, and a fixed The gear train is connected with the gear train by the movable block, and the movable block is provided with a mounting groove for the connecting rod to install the connecting rod, and the mounting groove is connected with a fixed shaft, and the fixed rod and the connecting rod are arranged perpendicular to each other, and the connecting rod is provided with a through hole for the fixed shaft to pass through, the push rod is connected to the movable block, and the push rod is arranged in a direction perpendicular to the movable block, the fixed seat is connected to the mounting plate, the push rod is slidably arranged on the fixed seat, and the fixed seat is provided with a sliding groove for the push rod to slide, and the driving motor is connected to the bottom plate, and the output shaft of the driving motor is coaxially connected with one of the rotating rods.

[0008] Preferably, the push rod is connected with a push block, the push block is arranged at the end of the push rod located in the mounting groove on the movable block, and the push block is made of rubber.

[0009] Preferably, a buffer spring is sleeved outside the support telescopic rod. One end of the buffer spring abuts against the bottom plate, and the other end abuts against the mounting plate. The buffer spring is always in a compressed state.

[0010] Preferably, the lifting assembly includes a fixed frame and a lifting cylinder. The fixed frame is connected to the mounting plate. Two fixed frames are respectively provided on opposite sides of the upper mold. The fixed frame is arranged in an "L" shape. The lifting cylinder is connected to the fixed frame. The piston rod of the lifting cylinder passes through the fixed frame and is connected to the upper mold.

[0011] Preferably, the clamping assembly includes a mounting seat, a pushing cylinder and a clamping block. The mounting seat is connected to the mounting plate. One mounting seat is respectively provided on opposite sides of the lower mold. The pushing cylinder is connected to the mounting seat. The piston rod of the pushing cylinder is arranged in the direction towards the lower mold. The clamping block is connected to the end of the piston rod of the pushing cylinder. The clamping block can be clamped between the upper mold and the lower mold and is arranged in a "C" shape. The parts of the upper mold and the lower mold inserted into the clamping block are chamfered.

[0012] Preferably, sealing valves are connected to both the injection pipe and the vacuum extraction pipe.

[0013] In summary, the present application includes the following beneficial technical effects:

[0014] A loosening-proof injection mold for processing automotive interior plastic parts provided by the present invention includes a bottom plate, a lower mold, an upper mold, a mounting plate, a pushing mechanism, a lifting assembly, a plug-in block, a sealing gasket, an injection pipe, a vacuum extraction pipe and a clamping assembly. During injection molding, the lifting assembly is used to drive the upper mold to descend and engage with the lower mold so that the first mold cavity and the second mold cavity are joined. During the engagement process, the plug-in block is inserted into the groove of the upper mold, and the sealing gasket on the plug-in block is squeezed by force and filled in the sealing groove. Then, the clamping assembly is used to clamp the upper mold and the lower mold. Next, the first mold cavity and the second mold cavity are evacuated through the vacuum extraction pipe and an external vacuum extraction device, reducing the influence of the air in the first mold cavity and the second mold cavity on the injection liquid, which is beneficial to improving the injection molding effect. After that, injection is carried out into the first mold cavity and the second mold cavity through the injection pipe and an external injection molding machine. After the injection liquid is injected, the lower mold and the upper mold are pushed up and down by the pushing mechanism, so that the injection liquid is evenly distributed in the first mold cavity and the second mold cavity, thereby achieving the effect of improving the problem of injection liquid leakage during the injection molding process of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the loosening-proof injection mold for processing automotive interior plastic parts in the embodiment of the present application;

[0016] Figure 2 is a schematic diagram for embodying the clamping assembly in the embodiment of the present application;

[0017] Figure 3 yes Figure 1 The enlarged view of point A in the middle;

[0018] Figure 4 yes Figure 1 The enlarged view of point B in the middle;

[0019] Figure 5 It is a schematic diagram for reflecting the push block in the embodiment of the present application;

[0020] Figure 6 It is a schematic diagram used to reflect the plug-in block in the embodiment of the present application.

[0021] Explanation of the reference numerals: 1. Base plate; 11. Mounting plate; 2. Lower mold; 21. Plug-in block; 211. Sealing pad; 3. Upper mold; 31. Injection tube; 32. Vacuum tube; 4. Push mechanism; 41. Support telescopic rod; 411. Buffer spring; 42. Bearing seat; 43. Rotating rod; 44. Cam; 441. Fixed rod; 45. Connecting rod; 46. Movable block; 461. Fixed shaft; 47. Push rod; 471. Push block; 48. Fixed seat; 49. Driving motor; 5. Lifting assembly; 51. Fixed frame; 52. Lifting cylinder; 6. Clamping assembly; 61. Mounting seat; 62. Push cylinder; 63. Clamping block; 7. Sealing valve. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is only an embodiment of a part of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two original components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present application discloses an anti-loosening injection mold for processing automobile interior plastic parts. Figure 1-Figure 6 The anti-loosening injection mold for processing automobile interior plastic parts includes a bottom plate 1, a lower mold 2 and an upper mold 3. A mounting plate 11 is arranged on the bottom plate 1. The mounting plate 11 and the bottom plate 1 are arranged parallel to each other. A pushing mechanism 4 for driving the mounting plate 11 to move up and down is arranged between the bottom plate 1 and the mounting plate 11. The lower mold 2 is connected to the mounting plate 11. The upper mold 3 is arranged above the lower mold 2. A lifting component 5 for driving the upper mold 3 to move up and down is arranged on the mounting plate 11. The lower mold 2 and the upper mold 3 are respectively provided with a first mold cavity and a second mold cavity. The lower mold 2 is provided with a plug-in block 21 The plug-in block 21 is located on the surface of the lower mold 2 facing the upper mold 3. The plug-in block 21 is arranged along the circumference of the lower mold 2. The cross-section of the plug-in block 21 is trapezoidal. A groove for the plug-in block 21 to be inserted is provided on the upper mold 3. A sealing gasket 211 is attached to the plug-in block 21. A sealing groove for the sealing gasket 211 to be squeezed and inserted is provided on the upper mold 3. An injection tube 31 and a vacuum tube 32 are respectively connected to the upper mold 3. The injection tube 31 and the vacuum tube 32 are both connected to the second mold cavity. A clamping component 6 for clamping the lower mold 2 and the upper mold 3 is also provided on the mounting plate 11.

[0025] During injection molding, the lifting component 5 is used to drive the upper mold 3 to descend and engage with the lower mold 2 to combine the first mold cavity and the second mold cavity. During the engaging process, the plug-in block 21 is inserted into the groove of the upper mold 3, and the sealing gasket 211 on the plug-in block 21 is squeezed and filled in the sealing groove. Then the clamping component 6 is used to clamp the upper mold 3 and the lower mold 2. Then, the first mold cavity and the second mold cavity are evacuated through the vacuum tube 32 and the external vacuum device to reduce the influence of the air in the first mold cavity and the second mold cavity on the injection molding liquid, which is beneficial to improve the injection molding effect. After that, injection molding is performed into the first mold cavity and the second mold cavity through the injection molding tube 31 and the external injection molding machine. After the injection molding liquid is injected, the pushing mechanism 4 is used to push the lower mold 2 and the lower mold 2 up and down to make the injection molding liquid evenly distributed in the first mold cavity and the second mold cavity, which can further improve the injection molding effect.

[0026] The pushing mechanism 4 includes a supporting telescopic rod 41, a bearing seat 42, a rotating rod 43, a cam 44, a connecting rod 45, a movable block 46, a push rod 47, a fixed seat 48 and a driving motor 49. The supporting telescopic rod 41 is connected between the base plate 1 and the mounting plate 11. The supporting telescopic rod 41 is arranged in a direction perpendicular to the base plate 1. The supporting telescopic rod 41 is respectively provided with one at the four corners of the base plate 1. The bearing seat 42 is connected to the base plate 1. Two bearing seats 42 are provided on the base plate 1. The rotating rod 43 is connected to the bearing seat 42. The rotating rod 43 is respectively provided with one on each bearing seat 42. The axes of the two rotating rods 43 are arranged in a colinear manner. The cam 44 is connected to the rotating rod 43. The cam 44 is respectively provided with one at the opposite ends of the two rotating rods 43. The two cams 44 are arranged relatively parallel. A fixed rod 441 is connected between the convex parts of the two cams 44. The fixed rod 441 is along The connecting rod 45 is arranged perpendicular to the direction of the cam 44, one end of the connecting rod 45 is rotatably connected to the fixed rod 441, and a connecting hole is provided on the connecting rod 45 for the fixing rod 441 to pass through. The other end of the connecting rod 45 is arranged on the movable block 46, and a mounting groove is provided on the movable block 46 for the connecting rod 45 to be installed. A fixing shaft 461 is connected in the mounting groove, and the fixing rod 441 and the connecting rod 45 are arranged perpendicular to each other. A through hole is provided on the connecting rod 45 for the fixing shaft 461 to pass through. The push rod 47 is connected to the movable block 46, and the push rod 47 is arranged in a direction perpendicular to the movable block 46. The fixing seat 48 is connected to the mounting plate 11, and the push rod 47 is slidably arranged on the fixing seat 48. A sliding groove is provided on the fixing seat 48 for the push rod 47 to slide. The driving motor 49 is connected to the base plate 1, and the output shaft of the driving motor 49 is coaxially connected to one of the rotating rods 43.

[0027] During operation, the driving motor 49 drives the rotating rod 43 to rotate, and the rotating rod 43 drives the cam 44 to rotate. The cam 44 drives the connecting rod 45 to rotate through the fixed rod 441, so that the connecting rod 45 has an up and down displacement difference. Therefore, the connecting rod 45 can drive the push rod 47 on the movable block 46 to push the fixed seat 48 and the mounting plate 11 to move upward. When the connecting rod 45 rotates downward, the mounting plate 11 falls under the action of gravity, so that the mounting plate 11 and the mold on the mounting plate 11 can move up and down, thereby shaking the injection liquid in the upper mold 3 and the lower mold 2 up and down, so that the injection liquid can be evenly distributed in the first mold cavity and the second mold cavity, which is beneficial to improving the injection molding effect.

[0028] The push rod 47 is connected to a push block 471, which is arranged at the end of the push rod 47 located in the mounting groove on the movable block 46. The push block 471 is made of rubber. By setting the push block 471, the collision between the push rod 47 and the fixing seat 48 made of metal can be avoided, which is beneficial to protecting the push rod 47 and the fixing seat 48.

[0029] A buffer spring 411 is provided on the outside of the supporting telescopic rod 41, one end of the buffer spring 411 abuts against the bottom plate 1, and the other end abuts against the mounting plate 11. The buffer spring 411 is always in a compressed state. When the mounting plate 11 and the upper device fall, since the buffer spring 411 is always in a compressed state, the elastic force can buffer the falling speed of the mounting plate 11 and reduce the impact force, which is beneficial to protecting the supporting telescopic rod 41.

[0030] The lifting assembly 5 includes a fixed frame 51 and a lifting cylinder 52. The fixed frame 51 is connected to the mounting plate 11. Two fixed frames 51 are respectively provided on the opposite sides of the upper mold 3. The fixed frame 51 is arranged in an "L" shape. The lifting cylinder 52 is connected to the fixed frame 51. The piston rod of the lifting cylinder 52 passes through the fixed frame 51 and is connected to the upper mold 3. The lifting cylinder 52 is used to drive the upper mold 3 to rise and fall to complete the parting and closing of the upper mold 3 and the lower mold 2.

[0031] The clamping assembly 6 includes a mounting base 61, a pushing cylinder 62 and a clamping block 63. The mounting base 61 is connected to the mounting plate 11, and one mounting base 61 is provided on each of the opposite sides of the lower mold 2. The pushing cylinder 62 is connected to the mounting base 61, and the piston rod of the pushing cylinder 62 is arranged in the direction towards the lower mold 2. The clamping block 63 is connected to the end of the piston rod of the pushing cylinder 62. The clamping block 63 can be clamped between the upper mold 3 and the lower mold 2 and is arranged in a "C" shape. The parts of the upper mold 3 and the lower mold 2 that are inserted into the clamping block 63 are chamfered. After the upper mold 3 and the lower mold 2 are closed, the pushing cylinder 62 is used to push the clamping block 63 to move towards the upper mold 3 and the lower mold 2, so that the clamping block 63 is clamped between the upper mold 3 and the lower mold 2. Since the parts of the upper mold 3 and the lower mold 2 that are inserted into the clamping block 63 are chamfered, the clamping block 63 has a pressing force on the upper mold 3 and the lower mold 2, which is beneficial to clamping the upper mold 3 and the lower mold 2.

[0032] Sealing valves 7 are connected to both the injection molding pipe 31 and the vacuum extraction pipe 32. The sealing valve 7 on the injection molding pipe 31 can be closed during vacuum extraction, and the sealing valve 7 on the vacuum extraction pipe 32 can be closed during injection molding. When the pushing mechanism 4 pushes the mounting plate 11 to vibrate up and down, the sealing valves 7 on the injection molding pipe 31 and the vacuum extraction pipe 32 are both closed.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An anti-loosening injection mold for automobile interior plastic parts processing, characterized by: The invention comprises a bottom plate (1), a lower mold (2) and an upper mold (3), wherein a mounting plate (11) is arranged on the bottom plate (1), the mounting plate (11) and the bottom plate (1) are arranged parallel to each other, a driving mechanism (4) for driving the mounting plate (11) to move up and down is arranged between the bottom plate (1) and the mounting plate (11), the lower mold (2) is connected to the mounting plate (11), the upper mold (3) is arranged above the lower mold (2), a lifting assembly (5) for driving the upper mold (3) to move up and down is arranged on the mounting plate (11), the lower mold (2) and the upper mold (3) are respectively provided with a first mold cavity and a second mold cavity, the lower mold (2) is provided with a plug-in block (21), the plug-in block (2 1) is located on the surface of the lower mold (2) facing the upper mold (3), the plug-in block (21) is arranged along the circumference of the lower mold (2), the cross-section of the plug-in block (21) is arranged in a trapezoidal shape, the upper mold (3) is provided with a groove for the plug-in block (21) to be inserted, the plug-in block (21) is attached with a sealing gasket (211), the upper mold (3) is provided with a sealing groove for the sealing gasket (211) to be squeezed and inserted, the upper mold (3) is respectively connected with an injection tube (31) and a vacuum tube (32), the injection tube (31) and the vacuum tube (32) are both connected to the second mold cavity, and the mounting plate (11) is also provided with a clamping component (6) for clamping the lower mold (2) and the upper mold (3).

2. The anti-loosening injection mold for automobile interior plastic parts processing according to claim 1, characterized in that: The pushing mechanism (4) comprises a supporting telescopic rod (41), a bearing seat (42), a rotating rod (43), a cam (44), a connecting rod (45), a movable block (46), a push rod (47), a fixing seat (48) and a driving motor (49); the supporting telescopic rod (41) is connected between the base plate (1) and the mounting plate (11); the supporting telescopic rod (41) is arranged in a direction perpendicular to the base plate (1); the supporting telescopic rod (41) is provided at four corners of the base plate (1), respectively; the bearing seat (42) is connected to the base plate (1), two bearing seats (42) are provided on the bottom plate (1), the rotating rod (43) is connected to the bearing seat (42), one rotating rod (43) is provided on each bearing seat (42), the axes of the two rotating rods (43) are arranged in a colinear manner, the cam (44) is connected to the rotating rod (43), one cam (44) is provided at the opposite ends of the two rotating rods (43), the two cams (44) are arranged relatively parallel, and a fixing rod (44) is connected between the convex parts of the two cams (44). 1), the fixed rod (441) is arranged in a direction perpendicular to the cam (44), one end of the connecting rod (45) is rotatably connected to the fixed rod (441), the connecting rod (45) is provided with a connecting hole for the fixed rod (441) to pass through, the other end of the connecting rod (45) is arranged on a movable block (46), the movable block (46) is provided with a mounting groove for the connecting rod (45) to be installed, a fixed shaft (461) is connected in the mounting groove, the fixed rod (441) and the connecting rod (45) are arranged perpendicular to each other, and the connecting rod (45) A through hole is provided on the top for the fixed shaft (461) to pass through, the push rod (47) is connected to the movable block (46), the push rod (47) is arranged in a direction perpendicular to the movable block (46), the fixed seat (48) is connected to the mounting plate (11), the push rod (47) is slidably arranged on the fixed seat (48), the fixed seat (48) is provided with a slide groove for the push rod (47) to slide, the drive motor (49) is connected to the bottom plate (1), and the output shaft of the drive motor (49) is coaxially connected to one of the rotating rods (43).

3. The anti-loosening injection mold for processing automobile interior plastic parts according to claim 2, characterized in that: The push rod (47) is connected to a push block (471), and the push block (471) is arranged at the end of the push rod (47) located in the mounting groove on the movable block (46), and the push block (471) is made of rubber material.

4. The anti-loosening injection mold for processing automobile interior plastic parts according to claim 2, characterized in that: The outer sleeve of the supporting telescopic rod (41) is provided with a buffer spring (411), one end of the buffer spring (411) abuts against the bottom plate (1), and the other end abuts against the mounting plate (11), and the buffer spring (411) is always in a compressed state.

5. The anti-loosening injection mold for processing automobile interior plastic parts according to claim 1, characterized in that: The lifting assembly (5) includes a fixed frame (51) and a lifting cylinder (52). The fixed frame (51) is connected to the mounting plate (11). Two fixed frames (51) are respectively provided on opposite sides of the upper mold (3). The fixed frame (51) is arranged in an "L" shape. The lifting cylinder (52) is connected to the fixed frame (51). The piston rod of the lifting cylinder (52) passes through the fixed frame (51) and is connected to the upper mold (3).

6. The anti-loosening injection mold for automobile interior plastic parts processing according to claim 1, characterized in that: The clamping assembly (6) includes a mounting seat (61), a pushing cylinder (62) and a clamping block (63). The mounting seat (61) is connected to the mounting plate (11). One mounting seat (61) is respectively provided on opposite sides of the lower mold (2). The pushing cylinder (62) is connected to the mounting seat (61). The piston rod of the pushing cylinder (62) is arranged in the direction towards the lower mold (2). The clamping block (63) is connected to the end of the piston rod of the pushing cylinder (62). The clamping block (63) can be clamped between the upper mold (3) and the lower mold (2) and is arranged in a "C" shape. The parts of the upper mold (3) and the lower mold (2) that are inserted into the clamping block (63) are chamfered.

7. The anti-loosening injection mold for automobile interior plastic parts processing according to claim 1, characterized in that: Sealing valves (7) are connected to both the injection pipe (31) and the vacuum extraction pipe (32).

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