Flow divider of plastic extrusion blow molding machine head

Abstract

The utility model discloses a shunting body of a plastic extrusion blow molding machine head, which comprises a shunting box, a runner assembly and a filling structure, the runner assembly is fixed in the shunting box, the filling structure is filled between the inner wall of the shunting box and the runner assembly, the runner assembly is made of high-temperature-resistant and wear-resistant metal materials, the filling structure is made of light heat conduction materials, and the inner wall of the shunting box is filled with the filling structure. And the shunting box is made of a high-strength material. The runner assembly made of a high-temperature-resistant and wear-resistant metal material is adopted, so that the high-temperature resistance and wear resistance of the inner wall of the runner are ensured, and meanwhile, the heat-conducting property is improved; the shunting box made of a high-strength material is used for fixing the runner assembly, so that the overall structural strength and rigidity of the shunting body are enhanced, and deformation and damage are prevented; the gap part between the flow channel assembly and the inner wall of the flow dividing box is filled with the filling structure made of the light heat conduction material, and it is ensured that the temperature in the flow dividing body is evenly distributed by means of the light characteristic and the good heat conduction performance of the light heat conduction material.

Description

A fluid distribution device for a plastic extrusion blow molding die head Technical Field

[0001] This utility model relates to the field of blow molding machine technology, and in particular to a fluid distribution device for a plastic extrusion blow molding die head. Background Technology

[0002] In plastic extrusion blow molding, the die head's flow divider is a core component for achieving uniform distribution of molten plastic, and its performance directly affects the uniformity of product wall thickness and molding quality. Traditional flow dividers are typically made from a single metal material, which presents problems such as uneven thermal conductivity, localized thermal stress concentration, and difficulty in balancing structural strength and lightweight design. Especially under prolonged high-temperature and high-pressure conditions, flow dividers made from a single material are prone to thermal fatigue, leading to flow channel deformation or wear, which in turn causes defects such as unstable melt flow and extrusion fluctuations, thus affecting production efficiency and product quality. Summary of the Invention

[0003] The purpose of this invention is to provide a fluid distribution mechanism for a plastic extrusion blow molding die head, in order to solve one or more technical problems existing in the background art.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A flow divider for a plastic extrusion blow molding die head includes a flow divider box, a flow channel assembly, and a filling structure. The flow channel assembly is fixed inside the flow divider box, and the filling structure is filled between the inner wall of the flow divider box and the flow channel assembly. The flow channel assembly is made of a high-temperature resistant and wear-resistant metal material, the filling structure is made of a lightweight thermally conductive material, and the flow divider box is made of a high-strength material.

[0006] Preferably, the flow channel assembly is made of 38CrMoAl alloy steel.

[0007] Preferably, the filling structure is made of aluminum alloy.

[0008] Preferably, the filling structure is made using 3D printing technology.

[0009] Preferably, the diversion box is made of 45# steel.

[0010] Preferably, the flow channel assembly includes an inner flow channel, a middle flow channel, and an outer flow channel, all of which are located within the flow distribution box.

[0011] Preferably, the diversion box includes a cover plate, an outer frame, and a diversion plate. The diversion plate is welded and fixed to the bottom of the outer frame. The flow channel assembly is fixed inside the outer frame. The cover plate is detachably placed on top of the outer frame. The front and left and right sides of the outer frame are respectively provided with a middle layer inlet, an inner layer inlet, and an outer layer inlet. The bottom of the diversion plate is provided with an inner layer outlet, a middle layer outlet, and an outer layer outlet distributed sequentially from the inside to the outside. The two ends of the inner layer flow channel are respectively connected to the inner layer inlet and the inner layer outlet. The two ends of the middle layer flow channel are respectively connected to the middle layer inlet and the middle layer outlet. The two ends of the outer layer flow channel are respectively connected to the outer layer inlet and the outer layer outlet.

[0012] Preferably, the flow channel assembly further includes an inner layer feed connector, an intermediate layer feed connector, and an outer layer feed connector, wherein the inner layer feed connector, the intermediate layer feed connector, and the outer layer feed connector are respectively welded and fixed to the inner wall of the outer frame; one end of the inner layer feed connector corresponds to the inner layer feed port, and the other end of the inner layer feed connector is connected to one end of the inner layer flow channel; one end of the intermediate layer feed connector corresponds to the intermediate layer feed port, and the other end of the intermediate layer feed connector is connected to one end of the intermediate layer flow channel; one end of the outer layer feed connector corresponds to the outer layer feed port, and the other end of the outer layer feed connector is connected to one end of the outer layer flow channel.

[0013] The beneficial effects of this invention are as follows: The fluid distributor of this invention employs a flow channel assembly made of high-temperature resistant and wear-resistant metal material, ensuring the high-temperature resistance and wear resistance of the inner wall of the flow channel while improving thermal conductivity. A flow distribution box made of high-strength material is used to fix the flow channel assembly, enhancing the overall structural strength and rigidity of the fluid distributor and preventing deformation and damage. A filling structure made of lightweight thermally conductive material fills the gap between the flow channel assembly and the inner wall of the flow distribution box, utilizing the lightweight properties and good thermal conductivity of the material to ensure uniform temperature distribution within the fluid distributor. Therefore, the various parts of the fluid distributor of this invention are made of different material combinations, balancing thermal conductivity, structural strength, and lightweight design, thus improving the overall performance of the fluid distributor. Attached Figure Description

[0014] The accompanying drawings further illustrate the present invention, but the content of the drawings does not constitute any limitation on the present invention.

[0015] Figure 1 is a schematic diagram of the internal structure of one embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the arrangement of the flow channel assembly according to one embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the structure of the diverter plate according to one embodiment of the present invention.

[0018] The components include: a flow distribution box 1, a flow channel assembly 2, a filling structure 3, an inner flow channel 211, an intermediate flow channel 221, an outer flow channel 231, a cover plate 11, an outer frame 12, a flow distribution plate 13, an intermediate layer inlet 121, an inner layer inlet 122, an outer layer inlet 123, an inner layer outlet 131, an intermediate layer outlet 132, an outer layer outlet 133, an inner layer inlet connector 212, an intermediate layer inlet connector 213, and an outer layer inlet connector 214. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] The fluid distribution of a plastic extrusion blow molding die head according to this embodiment, referring to Figures 1-3, includes a distribution box 1, a flow channel assembly 2, and a filling structure 3. The flow channel assembly 2 is fixed inside the distribution box 1, and the filling structure 3 is filled between the inner wall of the distribution box 1 and the flow channel assembly 2. The flow channel assembly 2 is made of a high-temperature resistant and wear-resistant metal material, the filling structure 3 is made of a lightweight thermally conductive material, and the distribution box 1 is made of a high-strength material.

[0021] In this embodiment, the fluid distributor employs a flow channel assembly 2 made of high-temperature resistant and wear-resistant metal material to ensure the high-temperature resistance and wear resistance of the inner wall of the flow channel, while also improving thermal conductivity. A flow distribution box 1 made of high-strength material is used to fix the flow channel assembly 2, enhancing the overall structural strength and rigidity of the fluid distributor and preventing deformation and damage. A filling structure 3 made of lightweight thermally conductive material fills the gap between the flow channel assembly 2 and the inner wall of the flow distribution box 1. Utilizing the lightweight properties and good thermal conductivity of the lightweight thermally conductive material, uniform temperature distribution within the fluid distributor is ensured. Therefore, the various parts of the fluid distributor in this embodiment are made of different material combinations, balancing thermal conductivity, structural strength, and lightweight design, thus improving the overall performance of the fluid distributor.

[0022] Preferably, the flow channel assembly 2 can be made of 38CrMoAl alloy steel. 38CrMoAl alloy steel has high temperature resistance and thermal stability, which makes it suitable for extrusion molding of high temperature molten plastics and avoids dimensional deviations of each flow channel due to thermal deformation. At the same time, 38CrMoAl alloy steel also has good wear resistance and corrosion resistance, which extends the service life of the flow distributor.

[0023] Preferably, the filling structure 3 can be made of aluminum alloy. Utilizing the thermal conductivity of aluminum alloy, the heat transferred by the flow channel component 2 can be quickly and evenly distributed to the distribution box 1, avoiding local overheating, ensuring uniform temperature of the molten plastic, and reducing uneven product thickness or surface defects. At the same time, aluminum alloy is also lightweight, which can significantly reduce the overall weight of the distribution box compared to the traditional steel filling structure 3.

[0024] Furthermore, the infill structure 3 can be made of aluminum alloy using 3D printing technology. 3D printing technology allows for flexible adjustments to the infill structure 3 according to actual needs, ensuring optimal overall performance, enabling flexible design and rapid manufacturing of complex structures, and shortening the production cycle.

[0025] Preferably, the diversion box 1 can be made of 45# steel. 45# steel has high tensile strength and yield strength, enabling it to withstand the high pressure and mechanical vibration during the extrusion process, ensuring the structural stability of the diversion box 1 and preventing deformation or cracking. 45# steel also has good machinability, making processing easier and reducing processing costs.

[0026] Preferably, the flow channel assembly 2 includes an inner flow channel 211, an intermediate flow channel 221, and an outer flow channel 231, all of which are located within the flow distribution box 1. By configuring the inner flow channel 211, the intermediate flow channel 221, and the outer flow channel 231, the extrusion of multi-layer plastics is achieved.

[0027] Preferably, the diversion box 1 includes a cover plate 11, an outer frame 12, and a diversion plate 13. The diversion plate 13 is welded and fixed to the bottom of the outer frame 12. The flow channel assembly 2 is fixed inside the outer frame 12. The cover plate 11 is detachably placed on top of the outer frame 12. The front and left and right sides of the outer frame 12 are respectively provided with a middle layer inlet 121, an inner layer inlet 122, and an outer layer inlet 123. The bottom of the diversion plate 13 is provided with an inner layer outlet 131, a middle layer outlet 132, and an outer layer outlet 133 distributed sequentially from the inside to the outside. The two ends of the inner layer flow channel 211 are respectively connected to the inner layer inlet 122 and the inner layer outlet 131. The two ends of the middle layer flow channel 221 are respectively connected to the middle layer inlet 121 and the middle layer outlet 132. The two ends of the outer layer flow channel 231 are respectively connected to the outer layer inlet 123 and the outer layer outlet 133.

[0028] By arranging the intermediate layer inlet 121, inner layer inlet 122, and outer layer inlet 123 on different sides of the outer frame 12, the arrangement of each layer of flow channels is facilitated, the length of the flow channels is reduced, and thus the thickness of the distributor can be reduced, saving production costs. By setting a distributor plate 13 at the bottom of the outer frame 12, and by opening an inner layer outlet 131, an intermediate layer outlet 132, and an outer layer outlet 133 sequentially distributed from the inside to the outside at the bottom of the distributor plate 13, the molten material entering the distributor can form multi-layered molten material distributed inside and outside under the guidance of each layer of flow channels, thereby achieving layered co-extrusion. The shape and size of each flow channel can be designed according to actual needs. The cover plate 11 is detachably connected to the outer frame 12, facilitating maintenance and replacement.

[0029] Preferably, the flow channel assembly 2 further includes an inner layer feed connector 212, an intermediate layer feed connector 213, and an outer layer feed connector 214. The inner layer feed connector 212, the intermediate layer feed connector 213, and the outer layer feed connector 214 are respectively welded and fixed to the inner wall of the outer frame 12. One end of the inner layer feed connector 212 corresponds to the inner layer feed port 122, and the other end of the inner layer feed connector 212 is connected to one end of the inner layer flow channel 211. One end of the intermediate layer feed connector 213 corresponds to the intermediate layer feed port 121, and the other end of the intermediate layer feed connector 213 is connected to one end of the intermediate layer flow channel 221. One end of the outer layer feed connector 214 corresponds to the outer layer feed port 123, and the other end of the outer layer feed connector 214 is connected to one end of the outer layer flow channel 231. By setting the inner layer feed connector 212, the middle layer feed connector 213 and the outer layer feed connector 214 to correspond to the inner layer feed port 122, the middle layer feed port 121 and the outer layer feed port 123 respectively, the molten material is evenly distributed into two or more flow channels connected to the connector through the corresponding connectors, so as to ensure uniform discharge and guarantee product quality.

[0030] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A splitter for a plastic extrusion blow head, characterized in that, The device includes a flow distribution box, a flow channel assembly, and a filling structure. The flow channel assembly is fixed inside the flow distribution box, and the filling structure is filled between the inner wall of the flow distribution box and the flow channel assembly. The flow channel assembly is made of a high-temperature resistant and wear-resistant metal material, the filling structure is made of a lightweight thermally conductive material, and the flow distribution box is made of a high-strength material.

2. The fluid distribution mechanism of a plastic extrusion blow molding die head according to claim 1, characterized in that, The flow channel assembly is made of 38CrMoAl alloy steel.

3. A flow divider for a plastic extrusion blow head as defined in claim 1, wherein, The filling structure is made of aluminum alloy.

4. The fluid distribution device of a plastic extrusion blow molding die head according to claim 3, characterized in that, The filling structure was made using 3D printing technology.

5. The fluid distribution mechanism of a plastic extrusion blow molding die head according to claim 3, characterized in that, The shunt box is made of 45# steel.

6. A flow divider for a plastic extrusion blow head as defined in claim 1, wherein, The flow channel assembly includes an inner flow channel, an intermediate flow channel, and an outer flow channel, all of which are located within the flow distribution box.

7. The fluid distribution device for a plastic extrusion blow molding die head according to claim 6, characterized in that, The diversion box includes a cover plate, an outer frame, and a diversion plate. The diversion plate is welded and fixed to the bottom of the outer frame. The flow channel assembly is fixed inside the outer frame. The cover plate is detachably placed on top of the outer frame. The front and left and right sides of the outer frame are respectively provided with a middle layer inlet, an inner layer inlet, and an outer layer inlet. The bottom of the diversion plate is provided with an inner layer outlet, a middle layer outlet, and an outer layer outlet distributed sequentially from the inside to the outside. The two ends of the inner layer flow channel are respectively connected to the inner layer inlet and the inner layer outlet. The two ends of the middle layer flow channel are respectively connected to the middle layer inlet and the middle layer outlet. The two ends of the outer layer flow channel are respectively connected to the outer layer inlet and the outer layer outlet.

8. A distributor for a plastic extrusion blown head as claimed in claim 7, characterized in that, The flow channel assembly further includes an inner layer feed connector, an intermediate layer feed connector, and an outer layer feed connector. The inner layer feed connector, the intermediate layer feed connector, and the outer layer feed connector are respectively welded and fixed to the inner wall of the outer frame. One end of the inner layer feed connector corresponds to the inner layer feed port, and the other end of the inner layer feed connector is connected to one end of the inner layer flow channel. One end of the intermediate layer feed connector corresponds to the intermediate layer feed port, and the other end of the intermediate layer feed connector is connected to one end of the intermediate layer flow channel. One end of the outer layer feed connector corresponds to the outer layer feed port, and the other end of the outer layer feed connector is connected to one end of the outer layer flow channel.

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