A pet foamed material and a method of manufacturing the same

Abstract

The application relates to the field of PET foaming materials, in particular to a PET foaming material and a manufacturing method thereof. The manufacturing method comprises the following steps: S1, selecting PET resin and a foaming agent; S2, melting and mixing the prepared PET resin and the foaming agent under high-temperature conditions, and then extruding the PET resin from an extruder into a vertical pipe; S3, extruding the PET resin from the vertical pipe into a round box, and continuously rotating the round box and multiple injection pipes on the round box to extrude the PET resin between two half boxes; and S4, introducing water vapor into the flat box, and spraying the water vapor on the PET resin through multiple air injection holes to promote the PET resin to form a PET foaming material. The PET foaming material is composed of the PET resin and the foaming agent. The foaming material is convenient for shaping and demolding.

Description

Technical Field

[0001] This invention relates to the field of PET foam materials, and more specifically to a PET foam material and its manufacturing method. Background Technology

[0002] PET foam material is a lightweight, porous material made from polyethylene terephthalate (PET) as a base material through a foaming process. PET is a widely used plastic, and due to its excellent mechanical properties and chemical stability, it is widely used in packaging, fibers, bottles, and other fields. PET foam materials are commonly used in: packaging materials (such as cushioning and insulated packaging); building materials (for doors, windows, and wall insulation); and electronic products (as protective materials). PET foam material possesses many excellent properties, making it suitable for multiple industries and an important engineering material. However, during the manufacturing process, PET foam material is prone to problems with shaping and demolding, thus requiring improvements to the shaping and demolding processes. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a PET foam material and its manufacturing method, which has the advantage of facilitating the shaping and demolding of the foam material.

[0004] A PET foam material manufacturing apparatus includes a tray with multiple strip grooves arranged from left to right on the upper side of the tray, and two half-boxes arranged on the left and right sides of the tray.

[0005] Both ends of the lower middle section of the pallet are fixed with baffles, and both baffles block the lower sides of the two pallets. Both ends of the lower side of the pallet are fixed with diagonal bars, and the lower end of each diagonal bar is fixed with a stop protrusion.

[0006] A bracket is fixed to the lower side of the tray, and a horizontal rail is fixed to the upper part of the bracket. Slide seats are slidably connected to both ends of the horizontal rail. The slide seats are driven to slide by a hydraulic cylinder. A convex shaft is fixed to the rear side of each half box. The two convex shafts are rotatably connected to the two slide seats respectively.

[0007] A PET foam material manufacturing apparatus and a method for manufacturing a PET foam material, comprising the following steps:

[0008] S1: Select PET resin and foaming agent;

[0009] S2: Melt and mix the prepared PET resin and foaming agent under high temperature conditions, and then extrude the PET resin from the extruder into the vertical pipe;

[0010] S3: The vertical tube squeezes PET resin out of the round box, and the round box and its multiple injection tubes rotate continuously to squeeze the PET resin between the two half boxes;

[0011] S4: Water vapor is introduced into the flat box, and the water vapor is sprayed onto the PET resin through multiple air jets to promote the foaming of the PET resin and form PET foam material.

[0012] A PET foam material manufacturing apparatus, which manufactures a PET foam material, the PET foam material being composed of PET resin and a foaming agent. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0014] Figure 1 A schematic diagram of a PET foam material manufacturing apparatus Figure 1 ;

[0015] Figure 2 A schematic diagram of a PET foam material manufacturing apparatus Figure 2 ;

[0016] Figure 3 A schematic diagram of a PET foam material manufacturing apparatus Figure 3 ;

[0017] Figure 4 Schematic diagram of the tray structure Figure 1 ;

[0018] Figure 5 Schematic diagram of the tray structure Figure 2 ;

[0019] Figure 6 Schematic diagram of the tray structure Figure 3 ;

[0020] Figure 7 This is a schematic diagram of the base structure;

[0021] Figure 8 A schematic diagram of the circular box structure Figure 1 ;

[0022] Figure 9 A schematic diagram of the circular box structure Figure 2 ;

[0023] Figure 10 This is a structural schematic diagram of the gantry;

[0024] Figure 11 A schematic diagram of the flat box structure Figure 1 ;

[0025] Figure 12 A schematic diagram of the flat box structure Figure 2 .

[0026] In the diagram: tray 101; baffle 102; half box 103; strip groove 104; diagonal bar 105; stop protrusion 106; horizontal rail 107; convex shaft 108; bracket 109; slide block 110;

[0027] Base 201; Slide rail 202; Lead screw 203; Vertical column 204; Vertical rod 205; Horizontal rod 206; Vertical pole 207;

[0028] 301. Round box; 302. Injection tube; 303. Gear ring 304; 305. Motor base; 306. Protruding plate; 307. Vertical tube; 308. Restriction hook;

[0029] 401 gantry; 402 center rod; 403 rocker arm; 404 turntable; 405 rotating frame; 406 side shaft; 407 gear ring II; 408 cam; 409 lifting rod;

[0030] Flat box 501; air injection pipe 502; L-shaped frame 503; fixing base 504; air jet port 505. Detailed Implementation

[0031] like Figure 4-6 As shown, this example demonstrates how to easily shape and demold foamed materials.

[0032] The PET foam material manufacturing apparatus includes a tray 101 with multiple strip grooves 104 arranged from left to right on its upper side. Two half-boxes 103 are arranged on either side of the tray 101. These half-boxes 103 allow PET resin and foaming agent to be mixed and extruded onto the upper side of the tray 101. The two half-boxes 103 enclose the PET resin, preventing it from detaching from the upper side of the tray 101. The two half-boxes 103 also limit the volume of the foamed PET resin and can be separated to facilitate shaping and demolding of the foam material. After the foam material has shaped, the multiple strip grooves 104 create multiple strip-shaped protrusions on the bottom of the foam material, thereby increasing the friction between the foam material and the contact object and preventing slippage during use.

[0033] like Figure 4-6 As shown, this example can achieve the effect that when the two half-boxes 103 are separated to the left and right, the two half-boxes 103 slide down the two diagonal bars 105.

[0034] Since baffles 102 are welded to both the front and rear ends of the lower middle part of the tray 101, and both baffles 102 block the lower side of the two trays 101, and diagonal rods 105 are welded to both the left and right ends of the lower side of the tray 101, and a stop protrusion 106 is welded to the lower end of each diagonal rod 105, the baffles 102 support the half box 103 at the bottom to prevent the half box 103 from shaking when it is closed. When the two half boxes 103 separate to the left and right, the two half boxes 103 slide down diagonally along the two diagonal rods 105 respectively. The stop protrusion 106 limits the maximum distance of the two half boxes 103 when they slide down.

[0035] like Figure 4-6 As shown, this example can achieve the effect that when the two half-boxes 103 are separated, the two half-boxes 103 slide diagonally downwards along the two diagonal bars 105 respectively.

[0036] Because a bracket 109 is welded to the lower side of the tray 101, and a horizontal rail 107 is welded to the upper part of the bracket 109, and slide blocks 110 are slidably connected to both ends of the horizontal rail 107. The slide blocks 110 are driven to slide by a hydraulic cylinder. A convex shaft 108 is welded to the rear side of each half box 103. The two convex shafts 108 are rotatably connected to the two slide blocks 110 respectively. The two slide blocks 110 can slide closer or further away on the horizontal rail 107, thereby driving the two convex shafts 108 and the two half boxes 103 to move closer or further away from each other. When the two half boxes 103 are separated, the two half boxes 103 slide down obliquely along the two inclined rods 105 respectively.

[0037] like Figure 7 As shown, this example allows the horizontal bar 206 to be adjusted freely in all directions, including up / down, forward / backward, and left / right.

[0038] Two uprights 207 are fixed to the lower side of the support plate 101. Both uprights 207 are fixed to the base 201. A slide rail 202 is provided at the rear of the base 201. The vertical column 204 is slidably connected to the slide rail 202. A motor is fixed on the base 201. A lead screw 203 is fixed on the output shaft of the motor. The lead screw 203 is threaded to the vertical column 204. A vertical rod 205 is slidably connected to the vertical column 204. A horizontal rod 206 is slidably connected to the upper part of the vertical rod 205 in the front-back direction. Both the vertical rod 205 and the horizontal rod 206 are driven to slide by a hydraulic cylinder. The motor drives the lead screw 203 to rotate, thereby driving the vertical column 204 to slide on the slide rail 202. The vertical rod 205 can slide vertically on the vertical column 204, and the horizontal rod 206 can slide back and forth on the vertical rod 205, thereby allowing the horizontal rod 206 to be adjusted freely in the up-down, front-back, and left-right positions.

[0039] like Figure 8-9 As shown, this example can achieve the effect of evenly spreading the material on the upper side of the tray 101.

[0040] The front of the horizontal rod 206 is connected to a vertical tube 307 by screws. The lower end of the vertical tube 307 is inserted into a circular box 301. Multiple injection tubes 302 are arranged in a ring on the lower side of the circular box 301. A toothed ring 303 is connected to the upper side of the circular box 301. A limiting hook 308 is welded onto the vertical tube 307. The limiting hook 308 is provided with a slot. The toothed ring 303 is inserted into the slot. A motor base 305 is connected to the right side of the vertical tube 307 by screws. A motor is connected to the motor base 305 by screws. A gear 3 is connected to the output shaft of the motor. 04. Gear 304 meshes with gear ring 303 for transmission. An extruder can be connected from the vertical pipe 307. PET resin and foaming agent are melted and mixed at high temperature and then extruded into the vertical pipe 307. The PET resin then enters the round box 301. The motor drives gear 304 to rotate, which in turn drives gear ring 303 and round box 301 to rotate, which in turn drives multiple injection pipes 302 to rotate. Material is extruded from the multiple continuously rotating injection pipes 302 into the upper side of the pallet 101, ensuring the material is evenly spread on the upper side of the pallet 101. A limiting hook 308 prevents the round box 301 from detaching from the vertical pipe 307.

[0041] like Figure 8-10 As shown, this example can achieve the effect of continuously mixing the material extruded by multiple injection tubes 302.

[0042] Since a protruding plate 306 is fixed on the right side of the vertical tube 307, and a gantry 401 is fixed on the protruding plate 306, a lifting rod 409 is vertically slidably connected to the gantry 401, and a rocker arm 403 is hinged to the front of the lifting rod 409, and side shafts 406 are fixed on both the front and rear sides of the rotating frame 405, the rotating frame 405 is rotatably connected to the lower part of the gantry 401 through the two side shafts 406, a turntable 404 is fixed on the side shaft 406 on the front side, and a rocker arm 403 is hinged to the eccentric position of the turntable 404. The upper part of the rocker arm 403 is hinged to the lifting rod 409, and the gantry 401 will move with the vertical tube 307. When the lifting rod 409 slides vertically back and forth, it drives the turntable 404 to rotate through the rocker arm 403, which in turn drives the rotating frame 405 to rotate on the lower side of the gantry 401 through the two side shafts 406, so that the material extruded by the multiple injection tubes 302 is continuously mixed.

[0043] like Figure 10 As shown, this example can achieve the effect of driving the lifting rod 409 to move vertically back and forth.

[0044] A compression spring is fixed to the upper side of the lifting rod 409. The upper part of the compression spring is fixed to the upper part of the gantry 401. A middle rod 402 is fixed to the middle part of the gantry 401. A cam 408 is rotatably connected to the middle rod 402. The upper side of the cam 408 is an inclined surface. The cam 408 is located on the lower side of the lifting rod 409. A gear ring 407 is fixed to the cam 408. The gear ring 407 meshes with the gear 304 for transmission. When the gear 304 rotates, it will also drive the gear ring 407 and the cam 408 to rotate, thereby driving the lifting rod 409 to move upward. Then, the lifting rod 409 is pressed downward by the compression spring, thereby driving the lifting rod 409 to move vertically back and forth.

[0045] like Figure 11-12 As shown, this example demonstrates how water vapor can be evenly sprayed onto the material to promote the foaming of PET resin and form PET foam material.

[0046] Since a fixed seat 504 is welded to the front of the base 201, an L-shaped frame 503 is slidably connected to the fixed seat 504 in the front-back direction. The L-shaped frame 503 is driven to slide by a hydraulic cylinder. A flat box 501 is fixed to the upper part of the L-shaped frame 503. An air injection pipe 502 is provided on the upper side of the flat box 501. Multiple air jet holes 505 are evenly distributed on the lower side of the flat box 501. After the PET resin is injected into the upper side of the tray 101, the L-shaped frame 503 and the flat box 501 are driven to move forward, so that the flat box 501 moves to the upper side of the tray 101. Water vapor is introduced into the air injection pipe 502, and then the water vapor is sprayed out from the multiple air jet holes 505. The water vapor is evenly sprayed on the material to promote the foaming of PET resin and form PET foam material.

[0047] A PET foam material manufacturing apparatus and a method for manufacturing a PET foam material, characterized by comprising the following steps:

[0048] S1: Select PET resin and foaming agent;

[0049] S2: Melt and mix the prepared PET resin and foaming agent under high temperature conditions, and then extrude the PET resin from the extruder into the vertical tube 307;

[0050] S3: Vertical tube 307 squeezes PET resin out of round box 301. Round box 301 and multiple injection tubes 302 on it rotate continuously to squeeze PET resin into the space between two half boxes 103.

[0051] S4: Water vapor is introduced into the flat box 501, and the water vapor is sprayed onto the PET resin through multiple air jets 505 to promote the foaming of the PET resin and form PET foam material.

[0052] A PET foam material manufacturing apparatus, which manufactures a PET foam material, the PET foam material being composed of PET resin and a foaming agent.

Claims

1. A PET foam material manufacturing apparatus, comprising a pallet (101), characterized in that: The upper side of the tray (101) is provided with multiple strip grooves (104) from left to right, and two half boxes (103) are arranged on the left and right sides of the tray (101). Both ends of the lower middle part of the pallet (101) are fixed with baffles (102), and both baffles (102) block the lower side of the two pallets (101). Both ends of the lower side of the pallet (101) are fixed with diagonal rods (105), and each diagonal rod (105) is fixed with a stop protrusion (106) at the lower end. A bracket (109) is fixed to the lower side of the tray (101), and a horizontal rail (107) is fixed to the upper part of the bracket (109). Slide seats (110) are slidably connected to both ends of the horizontal rail (107). The slide seats (110) are driven to slide by a hydraulic cylinder. A convex shaft (108) is fixed to the rear side of each half box (103). The two convex shafts (108) are rotatably connected to the two slide seats (110) respectively. Two uprights (207) are fixed on the lower side of the pallet (101). Both uprights (207) are fixed on the base (201). A slide rail (202) is provided at the rear of the base (201). The vertical column (204) is slidably connected to the slide rail (202). A motor is fixed on the base (201). A lead screw (203) is fixed on the output shaft of the motor. The lead screw (203) is threaded to the vertical column (204). A vertical rod (205) is slidably connected to the vertical column (204). A horizontal rod (206) is slidably connected to the upper part of the vertical rod (205) in the front-back direction. The vertical rod (205) and the horizontal rod (206) are both driven to slide by a hydraulic cylinder. The front part of the flat rod (206) is fixed with a vertical tube (307), the lower end of the vertical tube (307) is inserted into the round box (301), the lower side of the round box (301) is provided with multiple injection tubes (302) in a ring, the upper side of the round box (301) is fixed with a toothed ring (303), the vertical tube (307) is fixed with a limiting hook (308), the limiting hook (308) is provided with a slot, the toothed ring (303) is inserted into the slot, the right side of the vertical tube (307) is fixed with a motor base (305), the motor base (305) is fixed with a motor, the output shaft of the motor is fixed with a gear (304), the gear (304) meshes with the toothed ring (303) for transmission; The base (201) is fixed with a fixed seat (504) at the front. An L-shaped frame (503) is slidably connected to the fixed seat (504) in the front-back direction. The L-shaped frame (503) is driven to slide by a hydraulic cylinder. A flat box (501) is fixed on the upper part of the L-shaped frame (503). An air injection pipe (502) is provided on the upper side of the flat box (501). Multiple air injection holes (505) are evenly distributed on the lower side of the flat box (501).

2. The PET foam material manufacturing apparatus according to claim 1, characterized in that: A convex plate (306) is fixed on the right side of the vertical tube (307), a gantry (401) is fixed on the convex plate (306), a lifting rod (409) is vertically slidably connected on the gantry (401), a rocker arm (403) is hinged to the front of the lifting rod (409), a side shaft (406) is fixed on both the front and rear sides of the rotating frame (405), the rotating frame (405) is rotatably connected to the lower part of the gantry (401) through the two side shafts (406), a turntable (404) is fixed on the side shaft (406) on the front side, a rocker arm (403) is hinged to the eccentric position of the turntable (404), and the upper part of the rocker arm (403) is hinged to the lifting rod (409).

3. The PET foam material manufacturing apparatus according to claim 2, characterized in that: A compression spring is fixed on the upper side of the lifting rod (409), and the upper part of the compression spring is fixed on the upper part of the gantry (401). A middle rod (402) is fixed in the middle of the gantry (401). A cam (408) is rotatably connected on the middle rod (402). The upper side of the cam (408) is an inclined plane. The cam (408) is located on the lower side of the lifting rod (409). A gear ring (407) is fixed on the cam (408). The gear ring (407) meshes with the gear (304) for transmission.

4. A PET foam material manufacturing apparatus according to claim 3, and a method for manufacturing a PET foam material, characterized in that, Includes the following steps: S1: Select PET resin and foaming agent; S2: Melt and mix the prepared PET resin and foaming agent under high temperature conditions, and then extrude the PET resin from the extruder into the vertical tube (307). S3: The vertical tube (307) extrudes PET resin into the round box (301), and the round box (301) and the multiple injection tubes (302) on it rotate continuously to squeeze the PET resin into the space between the two half boxes (103); S4: Water vapor is introduced into the flat box (501), and the water vapor is sprayed onto the PET resin through multiple air jets (505) to promote the foaming of the PET resin and form PET foam material.

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