A continuous extrusion molding equipment for low-foaming plastic products

Abstract

The invention relates to the technical field of extrusion molding equipment, and discloses a continuous extrusion molding equipment for low-foaming plastic products, comprising an inner core, a mounting seat, a positioning tube, a propulsion mechanism and a combined auxiliary mechanism. The propulsion mechanism is arranged on the mounting seat, and pushes the inner core to slide in the positioning tube along its own axial direction. The combined auxiliary mechanism is arranged on the mounting seat, and acts synchronously with the propulsion mechanism. When the inner core, the filling layer material and the skin layer material are combined, a jetting effect toward the center is provided at the periphery, and the motion trajectory of the jetting effect is annular. The invention utilizes a specially arranged propulsion mechanism to push the inner core to slide in the positioning tube along its own axial direction. When the inner core is conveyed, extrusion is adopted to avoid the polarization of the inner core. The combined auxiliary mechanism provides a jetting effect toward the center at the periphery, and drives the skin layer to actively move closer to the filling layer and shrink, and is coupled with the automatic expansion effect of the filling layer in an external-internal manner, thereby improving the firm effect of the combination of the filling layer and the skin layer.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion molding equipment, and more specifically, to a continuous extrusion molding equipment for low-foaming plastic products. Background Art

[0002] When a ship docks at a dock, it needs to withstand a certain impact force to dock at the dock. Therefore, in order to protect the exterior of the ship from damage, a plastic fender needs to be installed on the outside of the dock. Generally, the plastic fender is installed on the dock or floats on the water. The plastic fender is a thermoplastic engineering plastic with excellent comprehensive performance. The existing plastic fenders are composed of an inner core, a filling layer and a skin layer from the inside to the outside.

[0003] The traditional manufacturing method generally relies on an extrusion molding device, but there is a common problem when the traditional extrusion molding device extrudes the plastic fender, that is, the bonding force between the filling layer and the surface layer is often not strong enough, which leads to easy delamination. Once the filling layer and the surface layer delaminate, the protective effect of the plastic fender can be affected.

[0004] In addition, the surface of the inner core is not completely smooth during production and has certain uneven thickness. These will cause the inner core to vibrate when the traditional pushing method is used, resulting in it being easy to become unstable when combining with the filling layer and the surface layer.

[0005] The existing technical means for manufacturing plastic fenders do not yet have an effective solution to the delamination problem between the filling layer and the surface layer, so certain improvements are needed. Summary of the invention

[0006] The invention provides a continuous extrusion molding device for low-foaming plastic products, which solves the technical problem that there is no effective solution to the delamination problem of a filling layer and a skin layer when manufacturing plastic fenders in the related art.

[0007] The present invention provides a continuous extrusion molding device for low-foaming plastic products, comprising:

[0008] Inner core;

[0009] Mounting seat;

[0010] A positioning tube, the positioning tube is coaxially sleeved on the outside of the inner core;

[0011] The propulsion mechanism is arranged on the mounting seat and pushes the inner core to slide along its own axis in the positioning tube;

[0012] A first sleeve, wherein a first extrusion channel is formed between the first sleeve and the positioning tube, and the heated filling layer material flows in the first extrusion channel along the sliding direction of the inner core;

[0013] A second sleeve, wherein a second extrusion channel is formed between the second sleeve and the first sleeve, and the heated skin layer material flows in the second extrusion channel along the sliding direction of the inner core;

[0014] The combined auxiliary mechanism is arranged on the mounting seat and acts synchronously with the propulsion mechanism to provide a jet action toward the center from the periphery when the inner core, the filling layer material and the skin layer material are combined, and the motion trajectory of the jet action is annular.

[0015] As a further solution of the present invention: the propulsion mechanism includes a motor, a slide bed, a fixed seat, a movable seat, a vertical shaft, a lower roller, an upper roller, a first transmission member and a second transmission member; the motor and the slide bed are fixedly mounted on the mounting seat, the slide bed is fixedly mounted with a fixed seat, the movable seat is slidably arranged relative to the slide bed, the output end of the motor is fixedly connected with a vertical shaft, the lower roller is rotatably mounted on the fixed seat, the upper roller is rotatably mounted on the movable seat, the first transmission member is cooperated between the lower roller and the vertical shaft, and the second transmission member is cooperated between the upper roller and the vertical shaft.

[0016] As a further solution of the present invention: the first transmission member includes a first vertical bevel gear and a first transverse bevel gear, the first vertical bevel gear is fixedly mounted on the vertical shaft, and the tooth surface of the first vertical bevel gear faces vertically upward, the first transverse bevel gear is fixedly mounted on the shaft of the lower roller, and the first transverse bevel gear is vertically meshed with the first vertical bevel gear.

[0017] As a further solution of the present invention: the second transmission member includes a connecting frame, a second vertical bevel gear, a second transverse bevel gear, a key bar, a threaded rod, a sleeve and a handwheel. A connecting frame is fixedly provided on one side of the movable seat, and a second vertical bevel gear is rotatably installed in the connecting frame, and the second vertical bevel gear is slidably sleeved relative to the vertical shaft, a key bar is fixedly provided on the vertical shaft, a through groove that slides with the key bar is provided on the second vertical bevel gear, a second transverse bevel gear is fixedly sleeved on one side of the shaft body of the upper roller, and the second transverse bevel gear is vertically meshed with the second vertical bevel gear, a threaded rod is rotatably fitted on the slide bed, a sleeve is fixedly provided on the movable seat, and the sleeve is rotatably connected to the end of the threaded rod. When the end of the threaded rod moves up and down, the traction sleeve moves up and down synchronously, and a handwheel is fixedly provided on one end of the threaded rod extending out of the slide bed.

[0018] As a further solution of the present invention: the second vertical bevel gear is nested in the connecting frame, and the connecting frame is not in contact with the vertical shaft.

[0019] As a further scheme of the present invention: the combined auxiliary mechanism includes a first rotating shaft, a driven wheel, a driving wheel, a belt, a third vertical bevel gear, a second rotating shaft, a third transverse bevel gear, a toothed disc, a gear ring and an air jet head, the first rotating shaft is rotatably arranged on the mounting seat, a driven wheel is fixedly sleeved on the first rotating shaft, a driving wheel is fixedly sleeved on the vertical shaft, a belt is cooperated between the driving wheel and the driven wheel, the third vertical bevel gear is fixedly arranged on the top of the first rotating shaft, the second rotating shaft is rotatably arranged on the mounting seat, a third transverse bevel gear is fixedly arranged on the end of the second rotating shaft, the third vertical bevel gear is vertically meshed with the third transverse bevel gear, a toothed disc is fixedly sleeved on the second rotating shaft, one side of the mounting seat is in a circular ring shape covering the second sleeve, a toothed ring is rotatably sleeved on the circular ring-shaped part of the mounting seat, the toothed ring is meshed with the toothed disc, an air jet head is fixedly arranged on the toothed ring, and the air jet direction of the air jet head is from the edge of the toothed ring to its center.

[0020] As a further solution of the present invention: a first rubber outlet sleeve is provided at the outlet of the first extrusion channel, and a second rubber outlet sleeve is provided at the outlet of the second extrusion channel. The ends of the first rubber outlet sleeve and the second rubber outlet sleeve are flush with the end of the positioning tube.

[0021] As a further solution of the present invention: the first rubber outlet sleeve is fixedly arranged on the first sleeve, the second rubber outlet sleeve is fixedly arranged on the second sleeve, and the first rubber outlet sleeve and the second rubber outlet sleeve are both arranged to be hollow conical tubes with a diameter decreasing in the direction of pushing the inner core.

[0022] As a further solution of the present invention: the first sleeve is provided with a first extrusion port communicating with the first extrusion channel inlet, and the second sleeve is provided with a second extrusion port communicating with the second extrusion channel inlet.

[0023] As a further solution of the present invention: after the skin layer material leaves the second extrusion channel, it is cooled and formed by water cooling.

[0024] The beneficial effects of the present invention are:

[0025] The present invention utilizes a specially arranged propulsion mechanism to push the inner core to slide in the positioning tube along its own axial direction, and when conveying the inner core, an extrusion method is adopted to avoid polarization of the inner core (the surface of the inner core is not completely smooth during production and has a certain uneven thickness, which will cause the inner core to vibrate when the traditional pushing method is adopted), thereby providing a stable internal liner when the filling layer is combined with the epidermis layer, thereby improving the firmness of the combination of the filling layer and the epidermis layer.

[0026] The present invention adds a combination auxiliary mechanism when the filling layer and the skin layer are combined. The combination auxiliary mechanism provides a jet effect from the periphery to the center, and the movement trajectory of the jet effect is annular, that is, when the filling layer and the skin layer are combined, a uniform jet effect is applied to the outside of the skin layer. This jet effect, on the one hand, provides an extrusion effect, driving the skin layer to actively move closer to the filling layer and shrink, and couples with the automatic expansion effect of the filling layer, one inside and one outside, to improve the firmness of the combination of the filling layer and the skin layer. On the other hand, the jet effect can significantly increase the cooling rate of the skin layer material, thereby accelerating the combination of the filling layer and the skin layer, thereby improving the firmness of the combination of the filling layer and the skin layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a continuous extrusion molding device for low-foaming plastic products proposed by the present invention;

[0028] Figure 2 It is a schematic cross-sectional structure diagram of the combination of a positioning tube, a first sleeve and a second sleeve in a continuous extrusion molding device for low-foaming plastic products proposed by the present invention;

[0029] Figure 3 It is a schematic diagram of the decomposed structure of a continuous extrusion molding device for low-foaming plastic products proposed by the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of a propulsion mechanism in a continuous extrusion molding device for low-foaming plastic products proposed by the present invention;

[0031] Figure 5 It is a further decomposed structural schematic diagram of a propulsion mechanism in a continuous extrusion molding device for low-foaming plastic products proposed by the present invention;

[0032] Figure 6 yes Figure 5 Schematic diagram of the connection details between the threaded rod and the sleeve at A in the middle;

[0033] Figure 7 It is a schematic diagram of the connection details of the key strip in the propulsion mechanism of a continuous extrusion molding device for low-foaming plastic products proposed by the present invention;

[0034] Figure 8 It is a schematic diagram of the overall structure of a continuous extrusion molding device for low-foaming plastic products combined with an auxiliary mechanism proposed by the present invention;

[0035] Fig. 9 It is a schematic diagram of the detailed structure of an auxiliary mechanism in a continuous extrusion molding device for low-foaming plastic products proposed by the present invention.

[0036] In the figure: 110, positioning tube; 120, inner core; 130, first sleeve; 140, first extrusion channel; 150, first extrusion outlet; 160, second sleeve; 170, second extrusion channel; 180, second extrusion outlet; 210, first rubber sleeve; 310, second rubber sleeve; 4, mounting seat; 5, propulsion mechanism; 51, motor; 52, slide bed; 53, fixed seat; 54, movable seat; 55, vertical shaft; 56, lower roller; 57, upper roller; 58, first transmission member; 581, first vertical bevel gear; 582, first transverse bevel gear; 59, second transmission member; 591, connecting frame; 592, second vertical bevel gear; 593, second transverse bevel gear; 594, key bar; 595, threaded rod; 596, sleeve; 597, hand wheel; 6, combined auxiliary mechanism; 61, first rotating shaft; 62, driven wheel; 63, driving wheel; 64, belt; 65, third vertical bevel gear; 66, second rotating shaft; 67, third transverse bevel gear; 68, toothed disc; 69, gear ring; 610, nozzle. DETAILED DESCRIPTION

[0037] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0038] At least one embodiment of the present invention discloses a continuous extrusion molding device for low-foaming plastic products, comprising:

[0039] Inner core 120;

[0040] Mounting seat 4;

[0041] A positioning tube 110, wherein the positioning tube 110 is coaxially sleeved on the outside of the inner core 120;

[0042] The propulsion mechanism 5 is arranged on the mounting seat 4, and pushes the inner core 120 to slide along its own axis in the positioning tube 110;

[0043] A first sleeve 130 , wherein a first extrusion channel 140 is formed between the first sleeve 130 and the positioning tube 110 , and the heated filling layer material flows in the first extrusion channel 140 along the sliding direction of the inner core 120 ;

[0044] A second sleeve 160 , wherein a second extrusion channel 170 is formed between the second sleeve 160 and the first sleeve 130 , and the heated skin layer material flows in the second extrusion channel 170 along the sliding direction of the inner core 120 ;

[0045] The auxiliary mechanism 6 is combined with the mounting seat 4 and moves synchronously with the propulsion mechanism 5 to provide a jet action toward the center from the periphery when the inner core 120, the filling layer material and the skin layer material are combined, and the motion trajectory of the jet action is annular.

[0046] refer to Figure 1-Figure 3 The present invention provides a continuous extrusion molding device for low-foam plastic products. When manufacturing a plastic fender, the inner core 120 is transported by the propulsion mechanism 5, and the inner core 120 is ensured to slide along the positioning tube 110. At the same time, the heated filling layer material is injected into the first extrusion channel 140, and the heated skin layer material is injected into the second extrusion channel 170, wherein the heated filling layer material can automatically expand when leaving the first extrusion channel 140, the heated skin layer material can cool after leaving the second extrusion channel 170, and the cooled skin layer material can form a protective film on the outside of the filling layer.

[0047] In the above, during the specific implementation of the injection of the filling layer material and the skin layer material, an existing screw extruder used in plastic processing is used to transform the filling layer material and the skin layer material from a solid state into a molten state and obtain a certain initial flow velocity. In addition, during the specific implementation, the pushing speed of the screw extruder is controlled to achieve the filling layer material, the skin layer material and the inner core 120 each maintaining an appropriate output speed when they are combined in a dynamic process.

[0048] In the above, the specific implementation of cooling and molding the skin layer material after leaving the second extrusion channel 170 includes but is not limited to using the existing water cooling method used in plastic processing to cool and mold the plastic fender.

[0049] In the above, after the plastic fender is formed, it is continuously formed by adopting, but not limited to, a traction method in the existing plastic extrusion process.

[0050] In one embodiment of the present invention, in order to improve the problem that the filling layer and the surface layer of the finished plastic fender are not firmly bonded, delamination is easily caused, and the protective effect is reduced, the following specific implementation is provided:

[0051] A specially arranged propulsion mechanism 5 is used to push the inner core 120 to slide along its own axis in the positioning tube 110, and when conveying the inner core 120, an extrusion method is used to avoid polarization of the inner core 120 (the surface of the inner core 120 is not completely smooth during production and has a certain degree of uneven thickness, which will cause the inner core 120 to vibrate when the traditional pushing method is used), so as to provide a stable internal liner when the filling layer is combined with the skin layer, thereby improving the firmness of the combination of the filling layer and the skin layer;

[0052] When the filling layer and the skin layer are combined, a combination auxiliary mechanism 6 is added. The combination auxiliary mechanism 6 provides a jet effect from the periphery to the center, and the movement trajectory of the jet effect is annular, that is, when the filling layer and the skin layer are combined, a uniform jet effect is applied to the outside of the skin layer. This jet effect, on the one hand, provides an extrusion effect, driving the skin layer to actively move closer to the filling layer and shrink, and couples with the automatic expansion effect of the filling layer, one inside and one outside, to improve the firmness of the combination of the filling layer and the skin layer. On the other hand, the jet effect can significantly increase the cooling rate of the skin layer material, thereby accelerating the combination of the filling layer and the skin layer, thereby improving the firmness of the combination of the filling layer and the skin layer.

[0053] The specific implementation of the propulsion mechanism 5 is as follows:

[0054] The propulsion mechanism 5 includes a motor 51, a slide bed 52, a fixed seat 53, a movable seat 54, a vertical shaft 55, a lower roller 56, an upper roller 57, a first transmission member 58 and a second transmission member 59. The motor 51 and the slide bed 52 are fixedly mounted on the mounting seat 4. The slide bed 52 is fixedly mounted with the fixed seat 53. The movable seat 54 is slidably arranged relative to the slide bed 52. The output end of the motor 51 is fixedly connected with the vertical shaft 55. The lower roller 56 is rotatably mounted on the fixed seat 53. The upper roller 57 is rotatably mounted on the movable seat 54. The first transmission member 58 is arranged between the lower roller 56 and the vertical shaft 55. The second transmission member 59 is arranged between the upper roller 57 and the vertical shaft 55.

[0055] In the propulsion mechanism 5, the motor 51 drives the vertical shaft 55 to rotate, and drives the lower roller 56 and the upper roller 57 to rotate synchronously through the first transmission member 58 and the second transmission member 59, and the lower roller 56 and the upper roller 57 turn in opposite directions. The lower roller 56 and the upper roller 57 are respectively in extrusion contact with the bottom side and the top side of the inner core 120, and the extrusion friction generated by rotation drives the inner core 120 to slide. Through the second transmission member 59, the spacing between the upper roller 57 and the lower roller 56 is adjustable.

[0056] The first transmission member 58 includes a first vertical bevel gear 581 and a first transverse bevel gear 582. The first vertical bevel gear 581 is fixedly mounted on the vertical shaft 55, and the tooth surface of the first vertical bevel gear 581 faces vertically upward. The first transverse bevel gear 582 is fixedly mounted on the shaft of the lower roller 56, and the first transverse bevel gear 582 is vertically meshed with the first vertical bevel gear 581.

[0057] When the first transmission member 58 is implemented, refer to Figure 4 The first vertical bevel gear 581 rotates with the rotation of the vertical shaft 55, and through the meshing action, the first transverse bevel gear 582 rotates, thereby driving the lower roller 56 to rotate.

[0058] The second transmission member 59 includes a connecting frame 591, a second vertical bevel gear 592, a second horizontal bevel gear 593, a key bar 594, a threaded rod 595, a sleeve 596 and a hand wheel 597. The connecting frame 591 is fixedly provided on one side of the movable seat 54. The second vertical bevel gear 592 is rotatably installed in the connecting frame 591, and the second vertical bevel gear 592 is slidably sleeved relative to the vertical shaft 55. The key bar 594 is fixedly provided on the vertical shaft 55. The second vertical bevel gear 592 has a key bar 594 slidingly engaged with the key bar 594. A through groove is provided on one side of the shaft of the upper roller 57, and the second transverse bevel gear 593 is fixedly sleeved thereon. The second transverse bevel gear 593 is vertically meshed with the second vertical bevel gear 592. A threaded rod 595 is rotatably matched on the slide bed 52. A sleeve 596 is fixedly provided on the movable seat 54. The sleeve 596 is rotatably connected to the end of the threaded rod 595. When the end of the threaded rod 595 moves up and down, the traction sleeve 596 moves up and down synchronously. A hand wheel 597 is fixedly provided on one end of the threaded rod 595 extending out of the slide bed 52.

[0059] When the second transmission member 59 is implemented, refer to Figure 5 The second vertical bevel gear 592 rotates with the rotation of the vertical shaft 55. Through the meshing action, the second transverse bevel gear 593 rotates, thereby driving the upper roller 57 to rotate. In addition, through the second transmission member 59, in the shutdown state, the upper roller 57 can be driven to move to adapt to the transportation of inner cores 120 of different sizes, and the inner core 120 is filled between the upper roller 57 and the lower roller 56, which can ensure that the upper roller 57 and the lower roller 56 squeeze the inner core 120 tightly without loosening. In the specific implementation, the threaded rod 595 is driven to rotate by rotating the hand wheel 597 (which can also be equivalently replaced by an electric method to apply the rotation effect). The threaded rod 595 is connected with the sleeve 596 to pull the movable seat 54 to move up and down relative to the slide bed 52. During this movement, the cooperation between the second vertical bevel gear 592 and the key bar 594 allows the second vertical bevel gear 592 to move, and does not affect the rotation of the second vertical bevel gear 592 in the running state.

[0060] It is necessary to explain in particular that Figure 6 As shown, the connection between the end of the threaded rod 595 and the sleeve 596 allows the rotation of the threaded rod 595 and its pulling effect on the sleeve 596 to not interfere with each other.

[0061] It is necessary to explain in particular that Figure 7 As shown, the second vertical bevel gear 592 is nested in the connecting frame 591, and the connecting frame 591 does not contact the vertical shaft 55. The connecting frame 591 only serves as a connecting part to pull the second vertical bevel gear 592 to move up and down, and will not interfere with the rotation of the vertical shaft 55.

[0062] The combined auxiliary mechanism 6 includes a first rotating shaft 61, a driven wheel 62, a driving wheel 63, a belt 64, a third vertical bevel gear 65, a second rotating shaft 66, a third horizontal bevel gear 67, a toothed disc 68, a gear ring 69 and a jet head 610. The first rotating shaft 61 is rotatably arranged on the mounting seat 4, a driven wheel 62 is fixedly sleeved on the first rotating shaft 61, a driving wheel 63 is fixedly sleeved on the vertical shaft 55, a belt 64 is matched between the driving wheel 63 and the driven wheel 62, a third vertical bevel gear 65 is fixedly arranged on the top of the first rotating shaft 61, and the mounting A second rotating shaft 66 is rotatably mounted on the seat 4, a third transverse bevel gear 67 is fixedly mounted on the end of the second rotating shaft 66, the third vertical bevel gear 65 is vertically meshed with the third transverse bevel gear 67, a toothed disc 68 is fixedly sleeved on the second rotating shaft 66, one side of the mounting seat 4 is in the shape of a ring covering the second sleeve 160, a toothed ring 69 is rotatably sleeved on the annular portion of the mounting seat 4, the toothed ring 69 is meshed with the toothed disc 68, a nozzle 610 is fixedly mounted on the toothed ring 69, and the jet direction of the nozzle 610 is directed from the edge of the toothed ring 69 to its center.

[0063] refer to Figure 8 and Fig. 9 In the specific implementation of the auxiliary mechanism 6, the synchronous transmission structure formed by the driven wheel 62, the driving wheel 63 and the belt 64 is used to transmit the rotation of the vertical shaft 55 to the first rotating shaft 61, and then the meshing of the third vertical bevel gear 65 and the third horizontal bevel gear 67 is used to make the first rotating shaft 61 drive the second rotating shaft 66 to rotate. When the second rotating shaft 66 rotates, the toothed disc 68 immediately drives the gear ring 69 to rotate, so that the fixed nozzle 610 on the gear ring 69 moves in a circular trajectory.

[0064] A first rubber outlet sleeve 210 is disposed at the outlet of the first extrusion channel 140 , and a second rubber outlet sleeve 310 is disposed at the outlet of the second extrusion channel 170 . The ends of the first rubber outlet sleeve 210 and the second rubber outlet sleeve 310 are flush with the end of the positioning tube 110 .

[0065] refer to Figure 2 The filling layer material and the skin layer material extruded from the first rubber sleeve 210 and the second rubber sleeve 310 are combined with the inner core 120 here to form a finished plastic fender.

[0066] The first rubber outlet sleeve 210 is fixedly disposed on the first sleeve 130 , and the second rubber outlet sleeve 310 is fixedly disposed on the second sleeve 160 . The first rubber outlet sleeve 210 and the second rubber outlet sleeve 310 are both configured to be hollow conical tubes that decrease in diameter in the direction of pushing the inner core 120 .

[0067] refer to Figure 2The reduced diameter shape of the first rubber sleeve 210 and the second rubber sleeve 310 can gather the filling layer material and the skin layer material flowing through to a certain extent, so that the filling layer material and the skin layer material are more tightly combined.

[0068] The first sleeve 130 is provided with a first extrusion port 150 communicating with the inlet of the first extrusion channel 140 , and the second sleeve 160 is provided with a second extrusion port 180 communicating with the inlet of the second extrusion channel 170 .

[0069] refer to Figure 2 The first extrusion port 150 is used as an inlet for the filling layer material, and the second extrusion port 180 is used as an inlet for the skin layer material.

[0070] How it works

[0071] When manufacturing the plastic fender, the present invention uses the propulsion mechanism 5 to transport the inner core 120 and ensure that the inner core 120 slides along the positioning tube 110. At the same time, the heated filling layer material is injected into the first extrusion channel 140, and the heated skin layer material is injected into the second extrusion channel 170, wherein the heated filling layer material can automatically expand when leaving the first extrusion channel 140, and the heated skin layer material can be cooled after leaving the second extrusion channel 170, and the cooled skin layer material can form a protective film on the outer side of the filling layer. When the auxiliary mechanism 6 is specifically implemented, the synchronous transmission structure formed by the driven wheel 62, the driving wheel 63 and the belt 64 is used to transmit the rotation of the vertical shaft 55 to the first rotating shaft 61, and then the meshing of the third vertical bevel gear 65 and the third horizontal bevel gear 67 is used to make the first rotating shaft 61 drive the second rotating shaft 66 to rotate. When the second rotating shaft 66 rotates, the toothed disc 68 immediately drives the gear ring 69 to rotate, so that the fixed jet head 610 on the gear ring 69 moves in a circular trajectory.

[0072] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation mode. The above-mentioned specific implementation mode is merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make more forms of equivalent embodiments, all of which are within the protection of this embodiment.

Claims

1. A continuous extrusion molding device for low-foam plastic products, characterized in that: include: Inner core (120); Mounting seat (4); A positioning tube (110), the positioning tube (110) being coaxially sleeved on the outside of the inner core (120); A propulsion mechanism (5), the propulsion mechanism (5) being arranged on the mounting seat (4) and pushing the inner core (120) to slide in the positioning tube (110) along its own axial direction; A first sleeve (130), wherein a first extrusion channel (140) is formed between the first sleeve (130) and the positioning tube (110), and the heated filling layer material flows in the first extrusion channel (140) along the sliding direction of the inner core (120); A second sleeve (160), wherein a second extrusion channel (170) is formed between the second sleeve (160) and the first sleeve (130), and the heated skin layer material flows in the second extrusion channel (170) along the sliding direction of the inner core (120); A combination auxiliary mechanism (6) is arranged on the mounting seat (4) and cooperates with the propulsion mechanism (5) to synchronously move, and provides a jetting effect from the periphery to the center when the inner core (120), the filling layer material, and the skin layer material are combined, and the motion trajectory of the jetting effect is annular; The propulsion mechanism (5) comprises a motor (51), a slide bed (52), a fixed seat (53), a movable seat (54), a vertical shaft (55), a lower roller (56), an upper roller (57), a first transmission member (58) and a second transmission member (59); the motor (51) and the slide bed (52) are fixedly mounted on the mounting seat (4); the slide bed (52) is fixedly mounted with the fixed seat (53); the movable seat (54) is slidably arranged relative to the slide bed (52); the output end of the motor (51) is fixedly connected with the vertical shaft (55); the lower roller (56) is rotatably mounted on the fixed seat (53); the upper roller (57) is rotatably mounted on the movable seat (54); the first transmission member (58) is arranged between the lower roller (56) and the vertical shaft (55); and the second transmission member (59) is arranged between the upper roller (57) and the vertical shaft (55); The first transmission member (58) comprises a first vertical bevel gear (581) and a first transverse bevel gear (582), wherein the first vertical bevel gear (581) is fixedly sleeved on the vertical shaft (55), and the tooth surface of the first vertical bevel gear (581) faces vertically upward, and the first transverse bevel gear (582) is fixedly sleeved on the shaft of the lower roller (56), and the first transverse bevel gear (582) is vertically meshed with the first vertical bevel gear (581); The second transmission member (59) comprises a connecting frame (591), a second vertical bevel gear (592), a second horizontal bevel gear (593), a key bar (594), a threaded rod (595), a sleeve (596) and a hand wheel (597); a connecting frame (591) is fixedly arranged on one side of the movable seat (54); a second vertical bevel gear (592) is rotatably mounted in the connecting frame (591); the second vertical bevel gear (592) is slidably sleeved relative to the vertical shaft (55); a key bar (594) is fixedly arranged on the vertical shaft (55); and a second vertical bevel gear (592) is provided with a key bar that slides with the key bar (594). A through groove for movably engaging with the upper roller (57), a second transverse bevel gear (593) is fixedly sleeved on one side of the shaft of the upper roller (57), the second transverse bevel gear (593) is vertically meshed with the second vertical bevel gear (592), a threaded rod (595) is rotatably engaged on the slide bed (52), a sleeve (596) is fixedly arranged on the movable seat (54), the sleeve (596) is rotatably connected to the end of the threaded rod (595), when the end of the threaded rod (595) moves up and down, the traction sleeve (596) moves up and down synchronously, and a hand wheel (597) is fixedly arranged on one end of the threaded rod (595) extending out of the slide bed (52); The combination auxiliary mechanism (6) comprises a first rotating shaft (61), a driven wheel (62), a driving wheel (63), a belt (64), a third vertical bevel gear (65), a second rotating shaft (66), a third horizontal bevel gear (67), a toothed disc (68), a gear ring (69) and an injection head (610); the first rotating shaft (61) is rotatably arranged on the mounting seat (4); a driven wheel (62) is fixedly sleeved on the first rotating shaft (61); a driving wheel (63) is fixedly sleeved on the vertical shaft (55); a belt (64) is cooperatively arranged between the driving wheel (63) and the driven wheel (62); a third vertical bevel gear (65) is fixedly arranged on the top of the first rotating shaft (61); A second rotating shaft (66) is rotatably mounted on the mounting seat (4); a third transverse bevel gear (67) is fixedly mounted on the end of the second rotating shaft (66); the third vertical bevel gear (65) is vertically meshed with the third transverse bevel gear (67); a toothed disc (68) is fixedly sleeved on the second rotating shaft (66); one side of the mounting seat (4) is in the shape of a ring covering the second sleeve (160); a toothed ring (69) is rotatably sleeved on the annular portion of the mounting seat (4); the toothed ring (69) is meshed with the toothed disc (68); an injection head (610) is fixedly mounted on the toothed ring (69); an injection direction of the injection head (610) is directed from the edge of the toothed ring (69) to the center thereof.

2. The continuous extrusion molding equipment for low-foam plastic products according to claim 1, characterized in that: The second vertical bevel gear (592) is nested in the connecting frame (591), and the connecting frame (591) is not in contact with the vertical shaft (55).

3. The continuous extrusion molding equipment for low-foam plastic products according to claim 1, characterized in that: A first rubber outlet sleeve (210) is provided at the outlet of the first extrusion channel (140), and a second rubber outlet sleeve (310) is provided at the outlet of the second extrusion channel (170). The ends of the first rubber outlet sleeve (210) and the second rubber outlet sleeve (310) are flush with the end of the positioning tube (110).

4. The continuous extrusion molding equipment for low-foam plastic products according to claim 3, characterized in that: The first rubber outlet sleeve (210) is fixedly arranged on the first sleeve (130), and the second rubber outlet sleeve (310) is fixedly arranged on the second sleeve (160). Both the first rubber outlet sleeve (210) and the second rubber outlet sleeve (310) are arranged in the shape of a hollow conical tube with a diameter that decreases in the direction of pushing the inner core (120).

5. The continuous extrusion molding equipment for low-foam plastic products according to claim 1, characterized in that: The first sleeve (130) is provided with a first extrusion port (150) communicating with an inlet of a first extrusion channel (140), and the second sleeve (160) is provided with a second extrusion port (180) communicating with an inlet of a second extrusion channel (170).

6. The continuous extrusion molding equipment for low-foam plastic products according to claim 1, characterized in that: After the skin layer material leaves the second extrusion channel (170), it is cooled and formed by water cooling.

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