Extrusion molding equipment suitable for processing P34HB and P34HB modified material straws

Abstract

The invention discloses extrusion molding equipment suitable for processing P34HB and a P34HB modified material suction pipe. The extrusion molding equipment comprises extruder equipment and vacuum sizing water tank equipment, the extruder equipment comprises an equipment rack part, a power and transmission part, a barrel screw and heating part and a mold part; the vacuum sizing water tank equipment comprises an equipment rack part, a water tank part and a water circulation part. The method specifically comprises the following steps: adding P34HB and modified particles thereof from a feeding port of a machine barrel of an extruder, melting and plasticizing the particles by a screw rod rotating at a certain rotating speed in the machine barrel and an external heater, quantitatively extruding the material into a shaping mold by the screw rod, extruding P34HB and modified suction pipes thereof by the mold under high pressure, entering vacuum sizing water tank equipment, and carrying out vacuum sizing on the P34HB and modified suction pipes to obtain the P34HB and modified particles. Through vacuum and water bath shaping of the vacuum section, different specifications of P34HB and P34HB modified material suction pipe products with stable wall thickness, pipe diameter and roundness can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of straw processing, and in particular to an extrusion molding device suitable for processing straws made of P34HB and modified materials thereof. Background Art

[0002] PHA-type straws can be degraded by marine organisms. P34HB belongs to the PHA material category. P34HB is a modified straw material customized around PHA (polyhydroxyalkanoate), and the organic part of the ingredients is only PHA. Straws can be prepared through hot extrusion processing, and this straw can be degraded in industrial composting, home composting, ocean, soil, and freshwater environments.

[0003] At present, the equipment of the test platform in the existing technology cannot meet the extrusion molding test of P34HB and its modified materials. There are two reasons: 1. The current test machine model is a 50 machine with an aspect ratio of 28. The melting section and plasticization cannot be reasonably arranged on the screw, resulting in its plasticization capacity being unable to meet the extrusion molding of P34HB and its modified materials; 2. The vacuum tank has a simple structure and insufficient rigidity, resulting in unstable straw wall thickness. The trial production of P34HB and its modified products is very different from the existing preparation process of compostable and ordinary materials. Summary of the invention

[0004] Purpose of the invention: The present invention proposes an extrusion molding equipment suitable for processing P34HB and its modified material straws, which solves the problem of stable production of P34HB and its modified materials.

[0005] Technical solution: The present invention proposes an extrusion molding device suitable for processing P34HB and modified material straws, including an extruder device and a vacuum sizing water tank device located behind the extruder device;

[0006] The extruder equipment comprises an extruder frame part, a power and transmission part located on the extruder frame part, and also comprises a barrel, a screw, a heating part and a mold part located on the extruder frame part; the power and transmission part comprises a stepping motor and a reduction box; the barrel is fixedly connected to the reduction box, the screw is installed inside the barrel, the screw is coaxially connected to the output shaft of the reduction box through a mounting shaft, and the heating part is installed on the outer circumferential surface of the barrel; the mold part comprises a connecting flange, a connecting sleeve, a shunt shuttle, a mold sleeve, a mold core, a die outer ring, a heating ring, and a pressure sensor; the connecting flange is fixed to the barrel, and the connecting sleeve is fixedly connected to the connecting flange; the connecting sleeve is provided with a shunt shuttle, a mold sleeve and a mold core; the mold sleeve has a hollow cavity, the mold core is coaxially installed on the shunt shuttle, and the mold core and the shunt shuttle are located in the cavity of the mold sleeve, the die outer ring is installed on the outer end surface of the mold sleeve, the heating ring is installed on the outer surface of the die outer ring, and the pressure sensor is installed on the connecting flange;

[0007] The vacuum sizing water tank equipment includes a vacuum sizing water tank frame part, a water tank part and a water circulation part; the vacuum sizing water tank frame part includes a bracket body and an adjustment mechanism; the water circulation part is installed in the internal space of the bracket body, the water tank part is placed above the adjustment mechanism, and the adjustment mechanism is controlled by a servo motor.

[0008] Preferably, an adjusting unit is provided at the lower end of the extruder frame portion.

[0009] Preferably, one end of the cylinder is fixed to the reduction box via a cylinder flange, and the other end is fixed to the cylinder by a connecting flange via a hexagon socket screw. A cylinder feeding port is provided at one end of the cylinder close to the reduction box.

[0010] Preferably, the screw comprises a feeding section, a pressure building section, a BM section, a mixing section, a reflux section and a quantitative extrusion section, and the screw diameter is 65 mm.

[0011] Preferably, the water tank part is placed above the adjusting mechanism, and the water tank part and the adjusting mechanism are transmitted through the cooperation of a gear and a rack.

[0012] Preferably, the water tank portion comprises a lower water tank, an upper water tank, and a horizontal adjustment mechanism; the horizontal adjustment mechanism is located above the lower water tank, and an upper water tank is provided above the horizontal mechanism.

[0013] Preferably, the horizontal mechanism includes a guide block, a screw rod and a rotating handwheel; the guide block and the screw rod are threadedly connected, and the rotating handwheel is connected to the screw rod; the horizontal limit plate of the upper water trough will be inserted into the guide block, and the rotating handwheel controls the movement of the guide block and drives the upper water trough to move.

[0014] Preferably, the upper water trough is mounted on a plastic pad on the horizontal adjustment mechanism, and a sizing sleeve is also provided at the pipe inlet position of the upper water trough.

[0015] Preferably, the upper water tank is provided with a plurality of vacuum sizing sections, and the vacuum sizing sections are provided with vacuum pressure transmitters.

[0016] Preferably, the water circulation part comprises a pump, a water storage tank and a vacuum tank, and the pump, the water storage tank and the vacuum tank are installed in the inner space of the bracket body.

[0017] Beneficial effects: 1. The extrusion molding equipment for processing P34HB and modified material straw products has a wider adjustment process window for processing P34HB and modified material products, which greatly increases the plasticizing capacity of the extruder. The screw structure and mold structure of the equipment are specially developed for P34HB and modified materials, and qualified P34HB and modified material straw products (straws with an outer diameter of φ12mm) are produced.

[0018] 2. The extrusion molding equipment for processing P34HB and modified material straw products greatly reduces the energy consumption of the equipment through reasonable equipment structure and configuration, saving about 3-3.5 kWh of electricity (about 25%-28%) per hour, which is in line with economic benefits and has broad application prospects.

[0019] 3. The vacuum sizing water tank equipment described in the extrusion molding equipment for processing P34HB and its modified material straw products can realize automatic control of the equipment, provide stable and temperature-controlled circulating water and vacuum environment, so as to more efficiently adjust and stabilize product parameters. The wall thickness parameter of Φ12mm product can reach 0.22mm, and the stability can reach about ±0.02mm, which is not available in the PHA material straw product market. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A cross-sectional view of the extruder device provided by the present invention;

[0022] Figure 3 A three-dimensional diagram of the extruder device proposed by the present invention;

[0023] Figure 4 A cross-sectional view of the vacuum sizing water tank device proposed by the present invention;

[0024] Figure 5 A three-dimensional diagram of the vacuum sizing water tank device proposed by the present invention;

[0025] Figure 6A schematic diagram of the barrel structure of the extruder device proposed by the present invention;

[0026] Figure 7 A schematic diagram of the screw structure of the extruder device proposed by the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the water tank part of the vacuum sizing water tank equipment proposed by the present invention;

[0028] Fig. 9 A side view of the die portion of the extruder device provided by the present invention;

[0029] Fig.10 A cross-sectional view of a die portion of the extruder device provided by the present invention;

[0030] Fig.11 This is a schematic diagram of the structure of the regulating mechanism of the vacuum sizing water tank equipment proposed by the present invention;

[0031] Fig.12 This is a schematic diagram of the structure of the horizontal adjustment mechanism of the vacuum sizing water tank equipment proposed by the present invention;

[0032] Fig.13 A side view of the level adjustment mechanism of the vacuum sizing water tank device proposed by the present invention;

[0033] Fig.14 This is a schematic diagram of the upper water tank structure of the vacuum sizing water tank equipment proposed by the present invention;

[0034] Fig.15 This is a schematic structural diagram of the water circulation part of the vacuum sizing water tank equipment proposed in the present invention. DETAILED DESCRIPTION

[0035] See also Figures 1 to 15 , an extrusion molding equipment suitable for processing P34HB and its modified material straw products, including an extruder device and a vacuum sizing water tank device, the vacuum sizing water tank device is installed behind the extruder device, and its front, back, left, right, up and down position can be freely adjusted. The extruder device includes an extruder frame part, a power and transmission part, a barrel 6, a screw 5, a heating part 7 and a mold part 8. The vacuum sizing water tank device includes a vacuum sizing water tank frame part, a water tank part and a water circulation part.

[0036] The extruder frame is used to support the extruder equipment and is placed on the ground. It is equipped with an adjustment unit 1 to facilitate the adjustment of the power and transmission parts and the front and rear coaxiality of the barrel 6 and the screw 5. The power and transmission parts are installed above the extruder frame, using a stepper motor 2 and a reduction box 3, which are connected by an elastic pin coupling 4 to transmit the kinetic energy of the main motor to the reduction box and reduce power loss.

[0037] The barrel 6, screw 5 and heating part 7 provide core process parameters for the processing of P34HB and its modified products. The structural form of the barrel 6 and screw 5 is specially used for processing P34HB and its modified products. The heating part 7 provides a more stable and reliable process temperature for the equipment. The barrel 6 is fixed to the reduction box 3 by the barrel flange 18; the screw 5 contains a feeding section 21, a pressure building section 22, a BM section 23, a mixing section 24, a reflux section 25 and a quantitative extrusion section 26, and the screw diameter is 65mm; the screw 5 is installed inside the barrel 6 and connected to the reduction box 3 by a mounting shaft 20 with a flat key; the heating part 7 is a far-infrared heater installed on the outer surface of the barrel 6 to provide a heat source for the barrel 6, and a barrel feeding port 19 is provided at one end of the barrel 6 close to the reduction box 3.

[0038] The mold part 8 includes a connecting flange 9, a connecting sleeve 10, a diverter shuttle 11, a mold sleeve 12, a mold core 13, a mold mouth outer ring 15, a heating coil 14, and a pressure sensor 16; wherein the connecting flange 9 is fixed to the cylinder 6 by screws, and the stopper is positioned to ensure coaxiality; the connecting sleeve 10 and the connecting flange 9 are fastened by screws; the diverter shuttle 11, the mold sleeve 12 and the mold core 13 are installed on the connecting sleeve 10; the mold core 13 is installed on the diverter shuttle 11, and has a stopper for positioning; the mold mouth outer ring 15 is installed on the outer end surface of the mold sleeve 12; the heating coil 14 is installed on the outer surface of the mold mouth outer ring 15; the pressure sensor 16 is installed on the connecting flange 9, which can simultaneously detect the pressure and temperature of the molten material at the head of the machine.

[0039] The frame part of the vacuum sizing water tank includes a bracket body 27 and an adjustment mechanism 28, which are used to install the water tank part and the water circulation part. The water tank can be moved up and down and forward and backward, and is controlled by a servo motor 29, which can be used to realize automatic control of the equipment.

[0040] The water tank is placed above the adjustment mechanism 28, and the gear 30 and the rack 31 are used to transmit the water tank to move forward and backward. The water tank includes a lower water tank 32, an upper water tank 33, and a horizontal adjustment mechanism 34. The horizontal adjustment mechanism is installed above the lower water tank 32 to support the upper water tank 33. The guide block 35 and the screw rod 36 of the horizontal adjustment mechanism are threadedly connected. The guide block 35 can be moved left and right by rotating the hand wheel 37. The upper water tank 33 is installed on the plastic pad 38 on the horizontal adjustment mechanism 34. The horizontal limit plate 39 of the upper water tank 33 will be inserted into the guide block 35, so that the guide block 25 can drive the upper water tank 33 to move when it moves. The upper water tank is designed with 3 vacuum sizing sections 40, which can be independently controlled to achieve different process uses. The vacuum sizing section 40 is provided with a digital display vacuum pressure transmitter 41 to facilitate the adjustment of the vacuum degree of the vacuum section. The upper water tank inlet is provided with a sizing sleeve 42 to cooperate with the vacuum section to achieve stable control of the outer diameter of the suction pipe.

[0041] The water circulation part includes a pump 44, a water storage tank 43, and a vacuum box 45, all of which are installed in the internal space of the bracket body 27. The inlet and outlet of each pipeline are installed on-site using metal hoses; the water circulation part is used to provide a stable and temperature-controllable circulating water bath environment and vacuum environment for the upper water tank. The water storage tank can be connected to public hot and cold water, and can also be equipped with a hot and cold water integrated machine.

[0042] The stepper motor 2 in the extruder equipment is operated to transfer kinetic energy to the reduction box 3 through the elastic pin coupling 4, and the speed ratio of the reduction box is 12.5:1. After the torque is increased, the kinetic energy is transferred to the screw 5; P34HB and its modified particles or its modified particles are added to the gap between the screw 5 and the barrel 6 at the barrel feeding port 19, and in this process, they are continuously softened by the heat transferred by the heating part 7, and the rotating screw transports the particles to the rear end and enters different screw functional sections. The particles are compressed and extruded in the pressure building section 22, quickly melted in the BM section 23, mixed in the mixing section 24 and the reflux section 25, and then the fully plasticized material is quantitatively transported into the mold part 8 by the quantitative extrusion section 26; the diverter shuttle 11 of the mold part 8 divides the material into four parts, and after passing through the diverter shuttle, the four parts are re-fused into a tubular shape with a cavity inside and enter the mold sleeve 12 and the mold core 13 part, and are compressed to form a certain pressure. Finally, the material enters the outer ring 15 of the die mouth to extrude the die to form a tubular material.

[0043] The material extruded under high pressure is manually pulled into the sizing sleeve 42 of the vacuum sizing water tank equipment. Water continuously flows out of the sizing sleeve 42 to cool the material and initially shape it. The vacuum effect of the vacuum sizing section 40 will keep the water flowing between the material and the sizing sleeve 42. After passing through three vacuum sizing sections 40, the material is cooled and shaped to form P34HB and its modified material straw products with stable wall thickness, tube diameter and roundness, and then sent to the next equipment.

[0044] The invention adds P34HB and its modified particles or its modified particles through the feeding port of the extruder barrel, melts and plasticizes the particles through a special screw rotating at a certain speed in the barrel and an external heater, and then quantitatively squeezes the materials into a special shaping mold through the special screw. The special mold extrude P34HB and its modified straws through high pressure, and the straws enter a vacuum sizing water tank device, and are shaped through the vacuum and water bath of the vacuum section, so as to obtain P34HB and its modified material straw products of different specifications with stable wall thickness, tube diameter and roundness. The equipment can prepare straws with a minimum wall thickness of 0.22 mm.

Claims

1. An extrusion molding device suitable for processing P34HB and its modified material straws, characterized in that: It includes an extruder device and a vacuum sizing water tank device located behind the extruder device; The extruder device comprises an extruder frame part, a power and transmission part located on the extruder frame part, and also comprises a barrel (6), a screw (5), a heating part (7) and a mold part (8) located on the extruder frame part; the power and transmission part comprises a stepping motor (2) and a reduction box (3); the barrel (6) is fixedly connected to the reduction box (3), the screw (5) is installed inside the barrel (6), the screw (5) is coaxially connected to the output shaft of the reduction box (3) through a mounting shaft (20), and the heating part (7) is installed on the outer circumferential surface of the barrel (6); the mold part (8) comprises a connecting flange (9), a connecting sleeve (10), a diverter shuttle (11), a mold sleeve (12) , a mold core (13), a mold opening outer ring (15), a heating coil (14), and a pressure sensor (16); the connecting flange (9) is fixed to the cylinder (6), and the connecting sleeve (10) is fixedly connected to the connecting flange (9); the connecting sleeve (10) is provided with a diverter shuttle (11), a mold sleeve (12), and a mold core (13); the mold sleeve (12) has a hollow cavity, the mold core (13) is coaxially mounted on the diverter shuttle (11), and the mold core (13) and the diverter shuttle (11) are located in the cavity of the mold sleeve (12), the mold opening outer ring (15) is mounted on the outer end surface of the mold sleeve (12), the heating coil (14) is mounted on the outer surface of the mold opening outer ring (15), and the pressure sensor (16) is mounted on the connecting flange (9); The vacuum sizing water tank equipment comprises a vacuum sizing water tank frame part, a water tank part and a water circulation part; the vacuum sizing water tank frame part comprises a bracket body (27) and an adjustment mechanism (28); the water circulation part is installed in the internal space of the bracket body (27), the water tank part is placed above the adjustment mechanism (28), and the adjustment mechanism is controlled by a servo motor (29).

2. The extrusion molding equipment suitable for processing P34HB and its modified material straws according to claim 1 is characterized in that: An adjustment unit (1) is provided at the lower end of the extruder frame.

3. The extrusion molding equipment suitable for processing P34HB and its modified material straws according to claim 1 is characterized in that: One end of the cylinder (6) is fixed to the reduction box (3) via a cylinder flange (18), and the other end is fixed to the cylinder (6) via a hexagon socket screw (17) to fix the connecting flange (9). A cylinder feeding port (19) is provided at one end of the cylinder (6) close to the reduction box (3).

4. The extrusion molding equipment suitable for processing P34HB and modified material straws according to claim 1, characterized in that: The screw (5) comprises a feeding section (21), a pressure building section (22), a BM section (23), a mixing section (24), a reflux section (25) and a quantitative extrusion section (26), and the screw diameter is 65 mm.

5. The extrusion molding equipment suitable for processing P34HB and modified material straws according to claim 1, characterized in that: The water tank portion is placed above the regulating mechanism (28), and the water tank portion and the regulating mechanism (28) are transmitted through the cooperation of a gear (30) and a rack (31).

6. The extrusion molding equipment suitable for processing P34HB and its modified material straws according to claim 5, characterized in that: The water tank part comprises a lower water tank (32), an upper water tank (33), and a horizontal adjustment mechanism (34); the horizontal adjustment mechanism (34) is located above the lower water tank (32), and the upper water tank (32) is provided above the horizontal mechanism (34).

7. The extrusion molding equipment suitable for processing P34HB and its modified material straws according to claim 6, characterized in that: The horizontal mechanism (34) comprises a guide block (35), a screw rod (36) and a rotating hand wheel (37); the guide block (35) and the screw rod (36) are threadedly connected, and the rotating hand wheel (37) is connected to the screw rod (26); the horizontal limit plate (39) of the upper water tank (33) is inserted into the guide block (35), and the rotating hand wheel (37) controls the movement of the guide block (35) and drives the upper water tank (33) to move.

8. The extrusion molding equipment suitable for processing P34HB and its modified material straws according to claim 6, characterized in that: The upper water tank (33) is mounted on a plastic backing plate (38) on the horizontal adjustment mechanism, and a sizing sleeve (42) is also provided at the pipe inlet position of the upper water tank (33).

9. The extrusion molding equipment suitable for processing P34HB and modified material straws according to claim 7, characterized in that: The upper water tank (33) is provided with a plurality of vacuum sizing sections (40), and the vacuum sizing sections (40) are provided with a vacuum pressure transmitter (41).

10. The extrusion molding equipment suitable for processing P34HB and its modified material straws according to claim 1, characterized in that: The water circulation part comprises a pump (44), a water storage tank (43) and a vacuum tank (45), and the pump (44), the water storage tank (43) and the vacuum tank (45) are installed in the inner space of the bracket body (27).

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