Split low temperature insulated underwater pelletizing die

Abstract

The utility model relates to the technical field of granulating die, and disclose a separated low temperature heat insulation underwater granulating die, including heating mould core, the recess one is established to heating mould core one end center, install the shunt cone in the recess one, the recess two is established to heating mould core and is located shunt cone one end and is established in the recess two outside of shunt cone, the ring distribution even granulating die hole is established in the recess two, and the adjacent granulating die hole is connected through the conical surface. This separated low temperature heat insulation underwater granulating die, design is separated completely with heating mould core through wear -resisting layer, and the heat insulation support is set up at the installation place of die sheet and heating mould core, and the flow channel is connected through mould core nozzle, and the loss of heat insulation is isolated through a small amount of contact of mould core nozzle head, reduces the heat loss of mould core because of the water flow of mould surface, and the mould core temperature can keep stable state through a small amount of heat compensation, can greatly reduce the underwater granulating debugging time and debugging frequency.

Description

Technical Field

[0001] This utility model relates to the field of granulation die head technology, specifically a separate low-temperature insulated granulation die head. Background Technology

[0002] Traditional underwater pelletizing dies have the following technical drawbacks during the pelleting process: They can only achieve stable pelleting of a portion of TPU and TPE. They fail to achieve stable pelleting of many other materials with poor or exceptionally good flowability, such as highly filled PP, PE, and high-viscosity TPU, often resulting in significant pore blockage, inconsistent pellet lengths, and poor pellet formation. Furthermore, because the die is completely submerged in water, the water flow near the die carries away a large amount of heat, leading to excessive energy consumption and causing the heating rod or heating electromagnetic device to operate under overload conditions and rapidly fail.

[0003] Traditional die heads suffer significant heat loss due to heat conduction on the die surface, and most materials can only be granulated into single-row narrow pellets to ensure stable pelleting and pelleting quality.

[0004] Traditional die heads have their wear-resistant layer and core brazed together, requiring stress relief in a furnace after brazing. The entire die head uses a single material and cannot be further strengthened. The new granulation die head's flow channel extrusion pressure zone can use materials of different strengths and corrosion resistance, undergoing strength-enhancing heat treatment and corrosion-resistant treatment to adapt to high-pressure extrusion granulation of materials with poor flowability. Therefore, we propose a separate low-temperature insulated granulation die head to overcome the aforementioned technical shortcomings. Utility Model Content

[0005] The purpose of this invention is to provide a separate low-temperature insulated granulation die head to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a separate low-temperature insulated granulation die head, including a heating die core, a groove 1 is provided at the center of one end of the heating die core, a flow divider cone is installed in the groove 1, the heating die core is located at one end of the flow divider cone and a groove 2 is provided on the outside of the flow divider cone, and granulation die holes are evenly distributed in a ring in the groove 2, and adjacent granulation die holes are connected by a conical surface;

[0007] An external extruder feeds molten plastic into a splitting cone, where it is split by the cone shape. The split molten plastic then enters the pelletizing die through the cone surface.

[0008] The heating mold core has a groove three on the side away from the flow divider cone. The groove three is provided with evenly distributed granulation nozzles. The granulation nozzles are connected to the granulation mold holes. Evenly distributed separation support blocks are fixedly installed in the groove three.

[0009] The molten plastic enters the granulation nozzle through the granulation mold hole. Because the head of the granulation nozzle is tapered and the inner diameter of the granulation nozzle gradually decreases from the heating mold core toward the granulation nozzle, the molten plastic inside is reduced in diameter.

[0010] A separator is installed inside the groove three, and a heat insulation pad is installed on the side of the heating mold core away from the flow divider cone and on the outside of the separator.

[0011] Furthermore, the separating component includes a separable mold plate, a heat insulation sleeve, and a wear-resistant layer. The separable mold plate is installed on the inner side of the groove three. A connecting mold hole one corresponding to the granulation nozzle is opened on the inner side of the separable mold plate. A heat insulation sleeve is installed in the connecting mold hole one. A groove four is opened on the side of the separable mold plate away from the heating mold core. A wear-resistant layer is installed in the groove four. A connecting mold hole two corresponding to the connecting mold hole one is opened in the wear-resistant layer.

[0012] After the diameter reduction, the molten plastic enters the heat insulation sleeve, passes through the first connecting mold hole in the split mold plate, and then enters the second connecting mold hole in the wear-resistant layer. It is then discharged into the water chamber, where the water flow is aligned for cooling. At the same time, the external cutting mechanism cuts the cooled plastic to obtain plastic granules.

[0013] Furthermore, the wear-resistant layer is a brazed wear-resistant layer, and the wear-resistant layer and the separable module are installed separately. The wear-resistant layer is composed of multiple sets of brazed blocks arranged in a regular manner.

[0014] Furthermore, the separation support block creates a gap between the heating mold core and the separate mold piece, which reduces the contact between the metal surfaces of the separation support block and the separate mold piece.

[0015] Furthermore, the heat insulation sleeve corresponds to the granulation nozzle.

[0016] Furthermore, the granulation nozzle and the heating mold core are integrally constructed, the head of the granulation nozzle is conical, and the inner diameter of the granulation nozzle gradually decreases from the heating mold core toward the granulation nozzle.

[0017] Furthermore, the granulation nozzle and the heating mold core are connected in an embedded manner, the head of the granulation nozzle is conical, and the inner diameter of the granulation nozzle gradually decreases from the heating mold core toward the granulation nozzle.

[0018] Compared with the prior art, this utility model provides a separate low-temperature insulated granulation die head, which has the following beneficial effects:

[0019] This separate low-temperature insulated underwater granulation die head is designed to completely separate the wear-resistant layer from the heating die core. Thermal insulation supports are installed at the mounting points of the die and the heating die core. The flow channel is connected through the die core nozzle, and heat loss is isolated through minimal contact between the nozzle head and the die core. This reduces the amount of heat carried away by the water flow from the die core. The die core temperature can be kept stable with minimal thermal compensation, significantly reducing the time and frequency of underwater granulation adjustments. Therefore, the impact of widening the die surface on granulation quality is negligible, allowing for a significant increase in the number of granulation openings and increased production capacity with the same power output. Because the wear-resistant layer and the separate die are installed separately, and the wear-resistant layer consists of multiple regularly arranged brazed blocks, the extrusion pressure zone of the granulation die head flow channel can use materials of different strengths and corrosion resistance. It undergoes strength-enhancing heat treatment and corrosion-enhancing treatment, adapting to high-pressure extrusion granulation of materials with poor flowability. The overall granulation system power consumption is reduced by more than 30%, and the use of heating consumables is significantly reduced. It can achieve high-capacity granulation of micro-particles ranging from 0.5mm to 1.0mm. Because the wear-resistant, separable mold plate is separated from the heated mold core with only a small amount of metal surface contact, heat loss at the mold core due to heat conduction is greatly reduced, while maintaining a stable cooling water temperature. This creates favorable conditions for high-quality underwater granulation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0022] Figure 3 This is a three-dimensional structural diagram of the granulation nozzle of this utility model;

[0023] Figure 4 This is a schematic diagram of the exploded three-dimensional structure of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the present invention from another angle of explosion;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the detachable module of this utility model;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the detachable mold plate and wear-resistant layer combination of this utility model;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the wear-resistant layer of this utility model.

[0028] In the figure: 1. Diverter cone; 2. Heating mold core; 3. Granulation mold hole; 4. Separation support block; 5. Granulation nozzle; 6. Heat insulation pad; 7. Separator; 71. Separable mold plate; 72. Heat insulation sleeve; 73. Wear-resistant layer. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0030] Please see Figures 1-8 The split-type low-temperature insulated granulation die head includes a heating die core 2. A groove 1 is provided at the center of one end of the heating die core 2. A flow divider cone 1 is installed in the groove 1. The heating die core 2 is located at one end of the flow divider cone 1 and a groove 2 is provided on the outside of the flow divider cone 1. A uniformly distributed granulation die hole 3 is provided in the groove 2. Adjacent granulation die holes 3 are connected by a conical surface.

[0031] The external extruder feeds molten plastic into the diversion cone 1, where it is diverted by the cone shape. The molten plastic after diversion then enters the pelletizing die 3 through the cone surface.

[0032] A groove 3 is provided on the other side of the heating mold core 2 away from the diversion cone 1. A uniformly distributed granulation nozzle 5 is provided in the groove 3. The granulation nozzle 5 is connected to the granulation mold hole 3. A uniformly distributed separation support block 4 is fixedly installed in the groove 3.

[0033] The molten plastic enters the granulation nozzle 5 through the granulation mold hole 3. Since the head of the granulation nozzle 5 is tapered and the inner diameter of the granulation nozzle 5 gradually decreases from the heating mold core 2 toward the granulation nozzle 5, the molten plastic inside it is reduced in diameter.

[0034] A separator 7 is installed inside the groove 3. A heat insulation pad 6 is installed on the side of the heating mold core 2 away from the flow divider cone 1 and on the outside of the separator 7.

[0035] Furthermore, the separating component 7 includes a separating mold plate 71, a heat insulation sleeve 72, and a wear-resistant layer 73. The separating mold plate 71 is installed on the inner side of the groove three. A connecting mold hole one corresponding to the granulation nozzle 5 is opened on the inner side of the separating mold plate 71. A heat insulation sleeve 72 is installed in the connecting mold hole one. A groove four is opened on the side of the separating mold plate 71 away from the heating mold core 2. A wear-resistant layer 73 is installed in the groove four. A connecting mold hole two corresponding to the connecting mold hole one is opened in the wear-resistant layer 73.

[0036] After the diameter reduction, the molten plastic enters the heat insulation sleeve 72, passes through the connecting mold hole one in the separable mold plate 71, and then enters the connecting mold hole two in the wear-resistant layer 73. Subsequently, it is discharged into the water chamber, where the water flow is aligned for cooling. At the same time, the external cutting mechanism cuts the cooled plastic to obtain plastic granules.

[0037] Furthermore, the wear-resistant layer 73 is a brazed wear-resistant layer, and the wear-resistant layer 73 and the separable module 71 are installed separately. The wear-resistant layer 73 is composed of multiple sets of brazed blocks arranged in a regular manner.

[0038] Furthermore, by separating the support block 4 to create a gap between the heating mold core 2 and the separate mold piece 71, the contact between the metal surfaces of the support block 4 and the separate mold piece 71 can be reduced.

[0039] Furthermore, the heat insulation sleeve 72 corresponds to the granulation nozzle 5.

[0040] Furthermore, the granulation nozzle 5 and the heating mold core 2 are integrally constructed. The head of the granulation nozzle 5 is conical, and the inner diameter of the granulation nozzle 5 gradually decreases from the heating mold core 2 toward the granulation nozzle 5. Example 2

[0041] Please see Figure 3 The difference between Example 2 and Example 1 is that the granulation nozzle 5 and the heating mold core 2 are connected in an embedded manner, the head of the granulation nozzle 5 is conical, and the inner diameter of the granulation nozzle 5 gradually decreases from the heating mold core 2 toward the granulation nozzle 5.

[0042] The specific usage and function of this embodiment are as follows:

[0043] In use, the separator 7 and the granulation nozzle 5 are connected and installed opposite to the external water chamber, and the diversion cone 1 and the heating die core 2 are connected and installed opposite to the output end of the external extruder. The external extruder inputs the molten plastic into the diversion cone 1, and the molten plastic is diverted through the cone shape of the diversion cone 1. The molten plastic after diversion enters the granulation die hole 3 through the cone surface.

[0044] It then enters the granulation nozzle 5 through the granulation mold hole 3. Since the head of the granulation nozzle 5 is tapered and the inner diameter of the granulation nozzle 5 gradually decreases from the heating mold core 2 toward the granulation nozzle 5, the molten plastic inside it is reduced in diameter.

[0045] The granulation nozzle 5 can be integrated with the heating mold core 2 or it can be embedded in the heating mold core 2.

[0046] After the diameter reduction, the molten plastic enters the heat insulation sleeve 72, passes through the connecting mold hole one in the separable mold plate 71, and then enters the connecting mold hole two in the wear-resistant layer 73. Subsequently, it is discharged into the water chamber, where the water flow is aligned for cooling. At the same time, the external cutting mechanism cuts the cooled plastic to obtain plastic granules.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A separate low-temperature insulated granulation die head, comprising a heating die core (2), characterized in that: The heating mold core (2) has a groove 1 at one end center, and a flow divider cone (1) is installed in the groove 1. The heating mold core (2) is located at one end of the flow divider cone (1) and has a groove 2 on the outside of the flow divider cone (1). The groove 2 has a uniformly distributed annular granulation mold hole (3), and adjacent granulation mold holes (3) are connected by a conical surface. The heating mold core (2) has a groove three on the other side away from the flow divider cone (1). The groove three is provided with evenly distributed granulation nozzles (5). The granulation nozzles (5) are connected to the granulation mold hole (3). Evenly distributed separation support blocks (4) are fixedly installed in the groove three. A separator (7) is installed in the groove 3, and a heat insulation pad (6) is installed on the side of the heating mold core (2) away from the diversion cone (1) and on the outside of the separator (7).

2. The separate low-temperature insulated granulation die head according to claim 1, characterized in that: The separating component (7) includes a separating mold plate (71), a heat insulation sleeve (72), and a wear-resistant layer (73). The separating mold plate (71) is installed on the inner side of the groove three. A connecting mold hole one corresponding to the granulation nozzle (5) is opened on the inner side of the separating mold plate (71). A heat insulation sleeve (72) is provided in the connecting mold hole one. A groove four is opened on the side of the separating mold plate (71) away from the heating mold core (2). A wear-resistant layer (73) is installed in the groove four. A connecting mold hole two corresponding to the connecting mold hole one is opened in the wear-resistant layer (73).

3. The separate low-temperature insulated granulation die head according to claim 2, characterized in that: The wear-resistant layer (73) is a brazed wear-resistant layer. The wear-resistant layer (73) and the separable module (71) are installed separately. The wear-resistant layer (73) is composed of multiple sets of brazed blocks arranged in a regular manner.

4. The separate low-temperature insulated granulation die head according to claim 2, characterized in that: The separation support block (4) creates a gap between the heating mold core (2) and the separate mold piece (71), which reduces the contact between the metal surfaces of the separation support block (4) and the separate mold piece (71).

5. The separate low-temperature insulated granulation die head according to claim 2, characterized in that: The heat insulation sleeve (72) corresponds to the granulation nozzle (5).

6. The detachable low-temperature insulated granulation die head according to claim 1, characterized in that: The granulation nozzle (5) and the heating mold core (2) are integrally constructed. The head of the granulation nozzle (5) is conical, and the inner diameter of the granulation nozzle (5) gradually decreases from the heating mold core (2) toward the granulation nozzle (5).

7. The detachable low-temperature insulated granulation die head according to claim 1, characterized in that: The granulation nozzle (5) is embedded in the heating mold core (2). The head of the granulation nozzle (5) is conical, and the inner diameter of the granulation nozzle (5) gradually decreases from the heating mold core (2) toward the granulation nozzle (5).

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