Continuous extrusion equipment for foaming profile

Abstract

The utility model provides continuous extrusion equipment for foamed profiles. The continuous extrusion equipment comprises an extruder and a forming die assembly, the forming mold assembly comprises an upper mold conveying structure and a lower mold conveying structure, and a mold closing forming area is formed between the upper mold conveying structure and the lower mold conveying structure. The upper die conveying structure comprises an upper annular circulating conveying belt and a plurality of upper dies which are orderly and uniformly distributed along the circumference of the upper annular circulating conveying belt, and the lower die conveying structure comprises a lower annular circulating conveying belt and a plurality of lower dies which are orderly and uniformly distributed along the circumference of the lower annular circulating conveying belt; the running directions of the upper annular circulating conveying belt and the lower annular circulating conveying belt in the die assembly forming area are the same; an upper forming cavity is formed in the side, close to the lower die, of the upper die, a lower forming cavity is formed in the side, close to the upper die, of the lower die, the upper die and the lower die are assembled to form a foam forming cavity, and a glue injection channel is formed in the side, close to an extrusion die head of the extruder, of the foam forming cavity. The forming efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic extrusion, especially to a continuous extrusion equipment of foamed section bar. BACKGROUND

[0002] Traditional injection molding foaming is limited by the structure of injection molding machine and the runner structure of mold, and always cannot break through 2 times foaming ratio, and is easy to cause surface texture defects. Another high-ratio foaming is to pre-blend and granulate foaming materials including crosslinking agent and foaming agent, inject into the mold below 120 DEG C, then heat the mold to 210 DEG C and keep pressure for more than 10 minutes, open the mold to foam, and then shape, but this high-ratio foaming needs mold external shaping, and the size is unstable and time-consuming.

[0003] Chinese application publication number CN 115466515 A, application publication date is December 13, 2022, discloses a method for preparing a foamed silicone rubber material by extrusion foaming, which comprises putting the material into a screw extruder for extrusion; supercritical carbon dioxide is injected into the material during the extrusion process of the material in the screw extruder, and pre-crosslinking is carried out, and the extruded foaming material is vulcanized and shaped to obtain foamed silicone rubber; the method for preparing a foamed silicone rubber material by extrusion foaming of the utility model only uses supercritical carbon dioxide as a foaming agent, without adding other foaming agents, achieving the purpose of safety and environmental protection; by adding supercritical carbon dioxide to the silicone rubber during the extrusion process in the screw extruder, dynamic and uniform mixing is realized to ensure the uniformity of foaming; at the same time, by controlling the amount of supercritical carbon dioxide added, the foaming ratio can be controlled, the density of the product is controllable, the precision is high, so that the extruded silicone rubber foaming sheet can be continuously produced, or the foaming product can be prepared by hot curing molding, there is no pollutant emission, and green production can be realized. The defects of the prior art are: low molding efficiency, and improvement is urgently needed. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims to provide a continuous extrusion equipment of foamed section bar, and improve the molding efficiency.

[0005] The utility model provides a continuous extrusion equipment of foamed section bar, including extruder and molding die assembly, the molding die assembly includes upper die conveying structure and lower die conveying structure, and the upper die conveying structure and lower die conveying structure form the closed die molding area between them,

[0006] The upper die conveying structure comprises an upper annular circulating conveying belt and a plurality of upper dies arranged along the circumference of the upper annular circulating conveying belt; the lower die conveying structure comprises a lower annular circulating conveying belt and a plurality of lower dies arranged along the circumference of the lower annular circulating conveying belt; the running directions of the upper annular circulating conveying belt and the lower annular circulating conveying belt in the die combining and forming area are the same.

[0007] The side of the upper die close to the lower die is provided with an upper forming cavity, the side of the lower die close to the upper die is provided with a lower forming cavity, the upper die and the lower die form a foaming forming cavity after combining, and the foaming forming cavity is provided with a glue injection channel close to the side of the extruder die head.

[0008] Preferably, the upper die comprises an upper die core, a first positioning seat, a first driving motor and a first buffer guide rod, the upper die core is provided with the upper forming cavity, the first driving motor is fixedly installed on one side of the first positioning seat, the power output end of the first driving motor is connected with the upper die core through the first positioning seat, and the opposite sides of the upper die core close to the first positioning seat are both provided with the first buffer guide rod arranged through the first positioning seat; the upper die core is provided with an upper glue injection channel close to the side of the extruder die head.

[0009] The lower die comprises a lower die core, a second positioning seat, a second driving motor and a second buffer guide rod, the lower die core is provided with the lower forming cavity, the second driving motor is fixedly installed on one side of the second positioning seat, the power output end of the second driving motor is connected with the lower die core through the second positioning seat, the opposite sides of the lower die core close to the second positioning seat are both provided with the second buffer guide rod arranged through the second positioning seat, and the lower die core is provided with a lower glue injection channel close to the side of the extruder die head; the upper glue injection channel and the lower glue injection channel form the glue injection channel after combining.

[0010] Preferably, the lower die core and the upper die core are both provided with exhaust holes communicating with the foaming forming cavity.

[0011] Preferably, the lower die core is provided with a first temperature adjusting cavity around the position of the lower forming cavity, and the first temperature adjusting cavity is connected with a heat preservation liquid storage cavity through a pipeline; the upper die core is provided with a second temperature adjusting cavity around the position of the upper forming cavity, and the second temperature adjusting cavity is connected with a temperature adjusting liquid storage cavity through a pipeline.

[0012] Preferably, the extrusion die comprises a front upper die body, a rear upper die body, a front lower die body, a rear lower die body, an upper die lip and an adjusting slider, the rear upper die body is arranged on the upper part of the rear lower die body, the front lower die body is arranged on the side of the rear lower die body close to the discharge port, the front upper die body is arranged on the side of the rear upper die body close to the discharge port and above the front lower die body, the front upper die body and the rear upper die body jointly have an upper runner, the front lower die body and the rear lower die body jointly have a lower runner, and the rear upper die body and the rear lower die body jointly have a main runner; the upper runner inlet, the lower runner inlet and the main runner inlet are arranged on the same side; the main runner, the upper runner and the lower runner all have a coat hanger shape expanding from the middle to the left and right sides;

[0013] The upper die lip is arranged above the front lower die body and is connected with the front upper die body above it; the side of the rear upper die body close to the rear lower die body is provided with a mounting groove accommodating the adjusting slider, and the adjusting slider is correspondingly embedded in the mounting groove; the upper die lip and the front lower die body jointly have a composite runner; the side of the upper die lip close to the inlet of the front lower die body is formed with an upper groove, and a gradually increasing and then gradually decreasing front composite buffer space in the form of an obtuse-angled triangle in cross section is formed between the inner groove wall of the upper groove and the front lower die body from the feeding side to the discharging side; the upper runner, the lower runner and the main runner are all in communication with the front composite buffer space;

[0014] The side of the main runner connected with the composite runner is formed with an extrusion section structure; the extrusion section structure comprises a first horizontal extrusion section and a second sunken horizontal extrusion section; the adjusting slider is correspondingly arranged at the transition between the first horizontal extrusion section and the second sunken horizontal extrusion section to form a bent transition section; the second sunken horizontal extrusion section is located between the adjusting slider and the front composite buffer space and has a first protruding part and a second protruding part successively formed on the side surface close to the rear lower die body; the width distance of the bent transition section is smaller than that of the first horizontal extrusion section and the second sunken horizontal extrusion section; and a first water-drop-shaped inlet is formed at the connection between the main runner and the first horizontal extrusion section.

[0015] Preferably, the front upper die body is provided with a first heater at a position corresponding to the upper runner; the rear upper die body is provided with a second heater at a position corresponding to the upper runner; the front lower die body is provided with a third heater at a position corresponding to the lower runner; and the rear lower die body is provided with a fourth heater at a position corresponding to the lower runner.

[0016] Preferably, a traction device is arranged at the discharge end of the mold forming area, and the traction device is arranged to pull the cutting device.

[0017] The utility model discloses beneficial effects that: the upper die and lower die of each corresponding position seal the foaming profile of corresponding position in the foaming forming cavity, and the foaming profile expands in the foaming forming cavity until the foaming body fills the forming cavity and is cooled and shaped as a finished product, and the upper die and lower die of each corresponding position open die naturally along with the conveying direction of the conveying belt, and the finished product is linearly connected string-shaped, and compared with single-piece forming, the forming efficiency is directly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the front view of the utility model.

[0019] Fig. 2 It is the relative structure relation schematic drawing of upper die and lower die.

[0020] Fig. 3 It is the section view of extrusion die head.

[0021] The figure mark is: extruder 10, lower die 11, lower annular circulation conveying belt 12, upper annular circulation conveying belt 13, upper die 14, traction device 15, finished product 16, extrusion die head 17, forming die assembly 18, lower die conveying structure 19, closing die forming area 20, upper die conveying structure 21, glue injection channel 22, second driving motor 23, second buffer guide rod 24, first temperature adjusting cavity 25, foaming forming cavity 26, second temperature adjusting cavity 27, first positioning seat 29, first driving motor 30, first buffer guide rod 28, exhaust hole 31, second positioning seat 32, pipeline 33, front upper die body 34, rear upper die body 35, front lower die body 36, rear lower die body 37, upper runner 38, lower runner 39, main runner 40, upper runner inlet 41, lower runner inlet 42, main runner inlet 43, upper die lip 44, adjusting sliding block 45, composite runner 46, upper recess 47, front composite buffer space 48, first horizontal extrusion section 49, second sunken horizontal extrusion section 50, bending transition section 51, first protruding portion 52, second protruding portion 53, first water drop-shaped inlet 54, first heater 55, second heater 56, third heater 57, fourth heater 58, upper die kernel 60, lower die kernel 61. DETAILED DESCRIPTION

[0022] In order to further understand the features, technical means and specific purposes and functions of the utility model, the utility model is further described in detail below in combination with specific embodiments and drawings.

[0023] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through the intermediate medium indirectly connect, can be two element inside intercommunication.For the ordinary skill in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0024] With reference to Figs. 1-3 The utility model provides a kind of continuous extrusion equipment of foamed section bar, including extruder 10 and forming die assembly 18;Forming die assembly 18 includes upper die conveying structure 21 and lower die conveying structure 19, and upper die conveying structure 21 and lower die conveying structure 19 form die forming area 20 between;Upper die conveying structure 21 includes upper annular circulating conveying belt 13 and several upper die 14 along the perimeter of upper annular circulating conveying belt 13 order evenly distributed, and lower die conveying structure 19 includes lower annular circulating conveying belt 12 and several lower die 11 along the perimeter of lower annular circulating conveying belt 12 order evenly distributed;The running direction of upper annular circulating conveying belt 13 and lower annular circulating conveying belt 12 in die forming area 20 is identical;Upper die 14 is provided with upper forming cavity on the side close to lower die 11, and lower die 11 is provided with lower forming cavity on the side close to upper die 14, and upper die 14 and lower die 11 form foaming forming cavity 26 after die, and foaming forming cavity 26 is formed with glue injection channel 22 on the side close to extrusion die head 17 of extruder 10.

[0025] Upper die 14 includes upper die kernel 60, first locating seat 29, first drive motor 30, first buffer guide rod 28, and upper die kernel 60 is provided with upper forming cavity, and first drive motor 30 is fixedly installed on the side of first locating seat 29, and the power output end of first drive motor 30 is connected with upper die kernel 60 through first locating seat 29, and first buffer guide rod 28 is arranged through first locating seat 29 on the opposite sides of upper die kernel 60 close to first locating seat 29;Upper die kernel 60 is formed with upper glue injection channel on the side close to extrusion die head 17;First locating seat 29 is fixedly installed on upper annular circulating conveying belt 13.

[0026] The lower die 11 comprises a lower die core 61, a second positioning seat 32, a second driving motor 23 and a second buffer guide rod 24. The lower die core 61 is provided with a lower forming cavity. The second driving motor 23 is fixedly installed on one side of the second positioning seat 32. The power output end of the second driving motor 23 penetrates through the second positioning seat 32 and is connected with the lower die core 61. The opposite sides of the lower die core 61 close to the second positioning seat 32 are both provided with the second buffer guide rod 24 penetrating through the second positioning seat 32. The side of the lower die core 61 close to the extrusion die head 17 is formed with a lower glue injection channel. The upper glue injection channel and the lower glue injection channel form a glue injection channel 22 after clamping.

[0027] The lower die core 61 and the upper die core 60 are both provided with an exhaust hole 31 communicating with the foaming forming cavity 26. The positions of the lower die core 61 and the upper die core 60 corresponding to the exhaust hole 31 are provided with control valves.

[0028] The lower die core 61 is formed with a first temperature adjusting cavity 25 around the position of the lower forming cavity. The first temperature adjusting cavity 25 is connected with a heat preservation liquid storage cavity through a pipeline 33. The upper die core 60 is formed with a second temperature adjusting cavity 27 around the position of the upper forming cavity. The second temperature adjusting cavity 27 is connected with a temperature adjusting liquid storage cavity through a pipeline.

[0029] When clamping, the first driving motor 30 promotes the displacement of the upper die core 60 to the direction of the lower die core 61. The second driving motor 23 promotes the displacement of the lower die core 61 to the direction of the upper die core 60, until the upper die core 60 and the lower die core 61 are clamped to form the foaming forming cavity 26.

[0030] Preferably, the extrusion die head 17 comprises a front upper die body 34, a rear upper die body 35, a front lower die body 36, a rear lower die body 37, an upper die lip 44 and an adjusting sliding block 45. The rear upper die body 35 is correspondingly arranged on the upper part of the rear lower die body 37. The front lower die body 36 is correspondingly arranged on the side of the rear lower die body 37 close to the discharge port. The front upper die body 34 is correspondingly arranged on the side of the rear upper die body 35 close to the discharge port and is located above the front lower die body 36. The front upper die body 34 and the rear upper die body 35 jointly have an upper runner 38. The front lower die body 36 and the rear lower die body 37 jointly have a lower runner 39. The rear upper die body 35 and the rear lower die body 37 jointly have a main runner 40. The upper runner inlet 41, the lower runner inlet 42 and the main runner inlet 43 are arranged on the same side. The main runner 40, the upper runner 38 and the lower runner 39 all have a clothes hanger type which expands from the middle to the left and right sides.

[0031] The upper die lip 44 is arranged above the front lower die body 36 and is connected with the front upper die body 34 above it; the rear upper die body 35 is provided with a mounting groove for accommodating the adjusting slider 45 on the side close to the rear lower die body 37, and the adjusting slider 45 is correspondingly embedded in the mounting groove; the upper die lip 44 and the front lower die body 36 jointly have a composite flow channel 46; the upper die lip 44 is formed with an upper groove 47 on the side close to the feeding port of the front lower die body 36, and the inner groove wall of the upper groove 47 and the front lower die body 36 are formed with a front composite buffer space 48 in the form of an obtuse-angled triangle with gradually increasing and then gradually decreasing cross sections from the feeding side to the discharging side; the upper flow channel 38, the lower flow channel 39 and the main flow channel 40 are all in communication with the front composite buffer space 48; by forming the composite buffer space 48, the material entering the composite flow channel 46 from the upper flow channel 38, the lower flow channel 39 and the main flow channel 40 first has a process of gradually increasing and then gradually decreasing buffer mixing, the material is evenly divided to both sides in the flow channel, the material in the composite buffer space 48 is evenly flowed in the width direction, the uniformity of mixing and extrusion is improved, and thus the quality of the product is ensured, and the material thicknesses at different positions are different, so that the foamed and formed product is uniform in thickness and consistent in foaming ratio after foaming and forming in the mold.

[0032] The side, where the main flow channel 40 is connected with the composite flow channel 46, is formed with an extrusion section structure; the extrusion section structure comprises a first horizontal extrusion section 49 and a second sunken horizontal extrusion section 50; the adjusting slider 45 is correspondingly arranged at the transition between the first horizontal extrusion section 49 and the second sunken horizontal extrusion section 50 to form a bent transition section 51; the second sunken horizontal extrusion section 50 is located between the adjusting slider 45 and the front composite buffer space 48 and is sequentially formed with a first protruding part 52 and a second protruding part 53 on the side close to the rear lower die body 37; the width distance of the bent transition section 51 is smaller than that of the first horizontal extrusion section 49 and the second sunken horizontal extrusion section 50; by arranging the adjusting slider 45, on the one hand, the damaged adjusting slider 45 can be replaced to ensure the quality of the product, and on the other hand, the width of the bent transition section can be adjusted by replacing adjusting sliders 45 of different models, so that the material flowing into this position realizes different dampings, and when entering the second sunken horizontal extrusion section 50, the material is more uniform in cooperation with the first protruding part 52 and the second protruding part 53, thereby further ensuring the quality of the product.

[0033] Preferably, the first heater 55 is arranged at the position corresponding to the upper runner 38 of the front upper die body 34; the second heater 56 is arranged at the position corresponding to the upper runner 38 of the rear upper die body 35; the third heater 57 is arranged at the position corresponding to the lower runner 39 of the front lower die body 36; and the fourth heater 58 is arranged at the position corresponding to the lower runner 39 of the rear lower die body 37. The process temperature requirement of the material in each runner is ensured, thereby ensuring the product quality.

[0034] Preferably, the discharge end of the mold closing forming area 20 is provided with a traction device 15, which is arranged to pull the cutting device. On the one hand, the foamed profile can be pulled out by the traction device 15; on the other hand, the string-shaped finished product can be cut by the traction cutting device, thereby further improving the production efficiency.

[0035] The operation steps of the embodiment are as follows:

[0036] 1) The granular raw material required for foaming is added into the extruder 10;

[0037] 2) The granular raw material required for foaming is plasticized and uniformly mixed in the extruder 10, and then extruded from the extrusion die 17 into the mold closing forming area 20 at a pressure greater than the supercritical pressure;

[0038] 3) The upper die and the lower die at the corresponding position seal the foamed profile at the corresponding position in the foaming forming cavity 26, and the foamed profile expands in the foaming forming cavity 26 until the foaming body fills the forming cavity and then cools and sets as a finished product. The upper die and the lower die at the corresponding position are naturally opened along the conveying direction of the conveying belt;

[0039] 4) The foamed profile is continuously introduced to the opening direction along with each group of upper die and lower die in the mold closing state, so that a string of finished products 16 connected in series is pulled out in turn;

[0040] 5) The operation is repeated.

[0041] In the embodiment, each group of forming dies seals the foamed profile at the corresponding position in the die forming cavity, and the foamed profile expands until the foaming body fills the forming cavity and then cools and sets as a finished product. The finished product is in a string shape connected in series, thereby directly improving the forming efficiency.

[0042] The above-described embodiment only expresses one embodiment of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which are within the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A continuous extrusion apparatus for foamed profiles, characterized in that: The extruder (10) and the molding die assembly (18); The molding die assembly (18) comprises an upper die conveying structure (21) and a lower die conveying structure (19), and a mold closing molding area (20) is formed between the upper die conveying structure (21) and the lower die conveying structure (19); The upper die conveying structure (21) comprises an upper annular circulating conveying belt (13) and a plurality of upper dies (14) arranged along the circumference of the upper annular circulating conveying belt (13) in an orderly and uniform manner, and the lower die conveying structure (19) comprises a lower annular circulating conveying belt (12) and a plurality of lower dies (11) arranged along the circumference of the lower annular circulating conveying belt (12) in an orderly and uniform manner; the running directions of the upper annular circulating conveying belt (13) and the lower annular circulating conveying belt (12) in the mold closing molding area (20) are the same. The side of the upper die (14) close to the lower die (11) is provided with an upper molding cavity, the side of the lower die (11) close to the upper die (14) is provided with a lower molding cavity, and the upper die (14) and the lower die (11) form a foaming molding cavity (26) after mold closing, and the foaming molding cavity (26) is provided with a glue injection channel (22) on the side close to the extrusion die head (17) of the extruder (10).

2. A continuous extrusion apparatus for foamed profiles according to claim 1, characterized in that: The upper die (14) comprises an upper die core (60), a first positioning seat (29), a first driving motor (30), and a first buffer guide rod (28), the upper die core (60) is provided with the upper molding cavity, the first driving motor (30) is fixedly installed on one side of the first positioning seat (29), the power output end of the first driving motor (30) penetrates the first positioning seat (29) and is connected with the upper die core (60), and the upper die core (60) is provided with the first buffer guide rod (28) penetrating the first positioning seat (29) on the opposite sides close to the first positioning seat (29); the upper die core (60) is formed with an upper glue injection channel on the side close to the extrusion die head (17); The lower die (11) comprises a lower die core (61), a second positioning seat (32), a second driving motor (23), and a second buffer guide rod (24), the lower die core (61) is provided with the lower molding cavity, the second driving motor (23) is fixedly installed on one side of the second positioning seat (32), the power output end of the second driving motor (23) penetrates the second positioning seat (32) and is connected with the lower die core (61), and the lower die core (61) is provided with the second buffer guide rod (24) penetrating the second positioning seat (32) on the opposite sides close to the second positioning seat (32), and the lower die core (61) is formed with a lower glue injection channel on the side close to the extrusion die head (17); the upper glue injection channel and the lower glue injection channel form a glue injection channel (22) after mold closing.

3. A continuous extrusion apparatus for foamed profiles according to claim 2, characterized in that: The lower die core (61) and the upper die core (60) are both provided with an exhaust hole (31) communicating with the foaming molding cavity (26).

4. A continuous extrusion apparatus for foamed profiles according to claim 3, characterized in that: The lower die core (61) is formed with a first temperature adjusting cavity (25) around the position of the lower forming cavity, and the first temperature adjusting cavity (25) is connected with a heat preservation liquid storage cavity through a pipeline (33); the upper die core (60) is formed with a second temperature adjusting cavity (27) around the position of the upper forming cavity, and the second temperature adjusting cavity (27) is connected with a temperature adjusting liquid storage cavity through a pipeline.

5. A continuous extrusion apparatus for foamed profiles according to any one of claims 1-4, characterized in that: The extrusion die (17) comprises a front upper die body (34), a rear upper die body (35), a front lower die body (36), a rear lower die body (37), an upper die lip (44) and an adjusting slider (45), the rear upper die body (35) is correspondingly arranged on the upper part of the rear lower die body (37), the front lower die body (36) is correspondingly arranged on the side of the rear lower die body (37) close to the discharge port, the front upper die body (34) is correspondingly arranged on the side of the rear upper die body (35) close to the discharge port and is located above the front lower die body (36), the front upper die body (34) and the rear upper die body (35) jointly have an upper runner (38), the front lower die body (36) and the rear lower die body (37) jointly have a lower runner (39), and the rear upper die body (35) and the rear lower die body (37) jointly have a main runner (40); an upper runner inlet (41), a lower runner inlet (42) and a main runner inlet (43) are arranged on the same side; the main runner (40), the upper runner (38) and the lower runner (39) all have a clothes hanger type which is unfolded from the middle to the left and right sides; The upper die lip (44) is arranged above the front lower die body (36) and is connected with the front upper die body (34) above it; the rear upper die body (35) is provided with a mounting groove on the side close to the rear lower die body (37), the adjusting slider (45) is correspondingly embedded in the mounting groove, the upper die lip (44) and the front lower die body (36) jointly have a composite runner (46), the upper die lip (44) is formed with an upper groove (47) on the side close to the inlet of the front lower die body (36), a gradually increasing and then gradually decreasing front composite buffer space (48) in the form of an obtuse-angled triangle in cross section is formed between the inner groove wall of the upper groove (47) and the front lower die body (36) from the feeding side to the discharging side, and the upper runner (38), the lower runner (39) and the main runner (40) are all in communication with the front composite buffer space (48). The side where the main runner (40) is connected with the composite runner (46) is formed with an extrusion section structure; the extrusion section structure comprises a first horizontal extrusion section (49) and a second sunken horizontal extrusion section (50); the adjusting slider (45) is correspondingly arranged at the transition between the first horizontal extrusion section (49) and the second sunken horizontal extrusion section (50) to form a bent transition section (51); the second sunken horizontal extrusion section (50) is located between the adjusting slider (45) and the front composite buffer space (48) and is sequentially formed with a first protruding part (52) and a second protruding part (53) on the side close to the side surface of the rear lower die body (37); the width distance of the bent transition section (51) is smaller than the width distance of the first horizontal extrusion section (49) and the second sunken horizontal extrusion section (50); the connection between the main runner (40) and the first horizontal extrusion section (49) is formed with a first water-drop-shaped material inlet (54).

6. A continuous extrusion apparatus for foamed profiles according to claim 5, characterized in that: The front upper die body (34) is provided with a first heater (55) at the position corresponding to the upper runner (38); the rear upper die body (35) is provided with a second heater (56) at the position corresponding to the upper runner (38); the front lower die body (36) is provided with a third heater (57) at the position corresponding to the lower runner (39); and the rear lower die body (37) is provided with a fourth heater (58) at the position corresponding to the lower runner (39).

7. A continuous extrusion apparatus for foamed profiles according to claim 1, characterized in that: The discharge end of the mold closing forming area (20) is provided with a traction device (15), and the traction device (15) is arranged to pull the cutting device.

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