Composite runner of extruder die head

Abstract

The utility model discloses a composite runner of an extruder die head, which comprises a cylinder body, a core rod, a melt mixing flow guide cavity and a melt shunting flow guide cavity, the core rod is arranged in the cylinder body, the melt shunting flow guide cavity is arranged in the core rod, a plastic melt inlet is arranged at the top of one end of the cylinder body, and a plastic melt outlet is arranged at the top of the other end of the cylinder body. A melt mixing flow guide cavity is formed in the core rod, a melt relaxation discharging channel opening is formed in the bottom of the core rod, and a melt relaxation inner cavity is formed in the top of the melt relaxation discharging channel opening. According to the melt mixing device, the melt mixing spiral runners and the melt flow dividing and guiding cavities are installed, after melt enters the melt flow dividing and guiding cavities, the melt can be divided into the multiple sets of melt mixing spiral runners through the melt flow dividing and guiding cavities, the melt impacts on one another in the melt mixing spiral runners through the spiral structures of the melt mixing spiral runners, and therefore the melt mixing effect is improved. And the melt can be uniformly mixed in the melt mixing spiral runner, so that the melt can be uniformly distributed.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder equipment, in particular to a composite flow channel of an extruder die head. Background Art

[0002] The die head of the extrusion blow molding machine is a key component of the extrusion blow molding hollow molding machine. It is responsible for evenly distributing a stream of plastic melt entering the die head of the blow molding machine to the circumferential surface of the core rod, and forming a qualified parison suitable for blow molding through the gap between the flow channel groove on the core rod and the cylinder body.

[0003] For example, the utility model: "A composite flow channel of an extrusion blow molding machine die head", with the announcement number: "CN214000520U", makes the plastic melt distribution more even through a mixed flow channel of hanger grooves and spiral grooves distributed successively up and down. The spiral grooves are double spiral flow channels arranged up and down, passing through a section of hanger flow channel and two sections of spiral flow channels surrounding the core rod, so that the plastic melt is distributed through two flow channels, making the melt distribution more even. However, during the implementation of the patent, the melt enters the two groups of spiral grooves and is mixed only through the spiral grooves, which makes it difficult to fully mix the melt and thus difficult to distribute the melt evenly. Therefore, the utility model provides a composite flow channel of an extruder die head to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a composite flow channel of an extruder die head to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite flow channel of an extruder die head, comprising a cylinder body, a core rod, a melt mixing guide chamber and a melt diversion guide chamber, a core rod is installed inside the cylinder body, and a melt diversion guide chamber is arranged inside the core rod, a plastic melt inlet is arranged at the top of one end of the cylinder body, a melt mixing guide chamber is arranged inside the core rod, and a melt relaxation discharge port is arranged at the bottom of the core rod, and a melt relaxation inner cavity is arranged at the top of the melt relaxation discharge port.

[0006] Preferably, melt mixing spiral flow channels are evenly arranged on the outer side of the melt mixing guide cavity, and one end of the melt mixing spiral flow channel away from the melt mixing guide cavity is connected to the melt diversion guide cavity.

[0007] Preferably, six groups of diversion extrusion thin flow channels are evenly arranged on the top of the melt relaxation inner cavity, and the ends of the diversion extrusion thin flow channels away from the melt relaxation inner cavity are all connected to the melt mixing diversion cavity.

[0008] Preferably, four groups of the melt mixing spiral flow channels are provided, and the angle between two adjacent groups of the melt mixing spiral flow channels is ninety degrees.

[0009] Preferably, a main flow guide channel is provided on the top of the melt diversion guide cavity, and one end of the main flow guide channel away from the melt diversion guide cavity is communicated with the plastic melt inlet.

[0010] Preferably, a guide block is installed at the middle position of the bottom of the melt diversion and guiding cavity.

[0011] Preferably, a filter screen is installed inside the plastic melt inlet.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The composite flow channel of the extruder die head is provided with a melt mixing spiral flow channel and a melt diversion and guide cavity. After the melt enters the melt diversion and guide cavity, it can be diverted to multiple groups of melt mixing spiral flow channels through the melt diversion and guide cavity. The spiral structure of the melt mixing spiral flow channel makes the melts impact each other inside the melt mixing spiral flow channel, so that the melts can be evenly mixed inside the melt mixing spiral flow channel, which is conducive to evenly distributing the melt;

[0014] 2. The composite flow channel of the extruder die head is provided with a melt mixing guide cavity. After the melt in the multiple groups of melt mixing spiral flow channels enters the melt mixing guide cavity, since the multiple groups of melt mixing spiral flow channels are arranged opposite to each other, after the melt is ejected from the melt mixing spiral flow channels, it can impact each other in the melt mixing guide cavity, which can make the melt mixed again, which is conducive to evenly mixing the melt, so that the melt can be evenly distributed;

[0015] 3. The composite flow channel of the extruder die head is provided with a cylinder body, a melt relaxation cavity and a melt relaxation discharge port. The melt enters into a plurality of groups of smaller inner diameter guide extrusion flow channels through the melt mixing guide cavity, and can be extruded inside the guide extrusion flow channels to increase the impact force of the melt. After the melt enters into the larger diameter melt relaxation cavity from the guide extrusion flow channels, it can be quickly ejected into the melt relaxation cavity, and stretched and relaxed inside the melt relaxation cavity, thereby improving the quality of the blow-molded preforms and greatly improving the qualified rate of the blow-molded qualified preforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front cross-sectional view of the utility model;

[0017] Figure 2 It is a schematic top view and cross-sectional view of the melt mixing guide cavity of the utility model;

[0018] Figure 3 It is a top view and cross-sectional schematic diagram of the melt diversion and flow guiding cavity of the utility model.

[0019] In the figure: 1. Cylinder body; 2. Melt relaxation cavity; 3. Core rod; 4. Melt mixing guide cavity; 5. Melt mixing spiral flow channel; 6. Melt diversion guide cavity; 7. Filter screen; 8. Plastic melt inlet; 9. Main flow guide channel; 10. Guide bump; 11. Guide extrusion fine flow channel; 12. Melt relaxation discharge outlet. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 The utility model provides an embodiment: a composite flow channel of an extruder die head, comprising a cylinder body 1, a core rod 3, a melt mixing guide chamber 4 and a melt diversion guide chamber 6, the cylinder body 1 is installed with a core rod 3, and the core rod 3 is provided with a melt diversion guide chamber 6, a plastic melt inlet 8 is provided at the top of one end of the cylinder body 1, the core rod 3 is provided with a melt mixing guide chamber 4, and the bottom of the core rod 3 is provided with a melt relaxation discharge port 12, and the top of the melt relaxation discharge port 12 is provided with a melt relaxation inner cavity 2.

[0022] In this implementation:

[0023] Furthermore, melt mixing spiral flow channels 5 are evenly arranged on the outside of the melt mixing guide chamber 4, and one end of the melt mixing spiral flow channel 5 away from the melt mixing guide chamber 4 is connected to the melt diversion guide chamber 6. After the melt enters the melt diversion guide chamber 6, it can be diverted to multiple groups of melt mixing spiral flow channels 5 through the melt diversion guide chamber 6. The spiral structure of the melt mixing spiral flow channel 5 makes the melts impact each other inside the melt mixing spiral flow channel 5, so that the melts can be evenly mixed inside the melt mixing spiral flow channel 5, which is beneficial to evenly distribute the melt.

[0024] Furthermore, six groups of diversion extrusion runners 11 are evenly arranged on the top of the melt relaxation cavity 2, and the ends of the diversion extrusion runners 11 away from the melt relaxation cavity 2 are connected to the melt mixing diversion cavity 4. The melt enters the multiple groups of diversion extrusion runners 11 with smaller inner diameters through the melt mixing diversion cavity 4, and can be extruded inside the diversion extrusion runners 11 to increase the impact force of the melt. After the melt enters the melt relaxation cavity 2 with a larger diameter from the diversion extrusion runners 11, it can be quickly sprayed into the melt relaxation cavity 2, and stretched and relaxed inside the melt relaxation cavity 2, thereby improving the quality of the blow-molded preforms and greatly improving the pass rate of qualified blow-molded preforms.

[0025] Furthermore, four groups of melt mixing spiral flow channels 5 are provided, and the angle between two adjacent groups of melt mixing spiral flow channels 5 is ninety degrees. After the melt inside multiple groups of melt mixing spiral flow channels 5 enters the melt mixing guide cavity 4, since the multiple groups of melt mixing spiral flow channels 5 are arranged opposite to each other, after the melt is ejected from the melt mixing spiral flow channels 5, it can impact each other inside the melt mixing guide cavity 4, which can make the melt mixed again, which is beneficial to evenly mix the melt, thereby evenly distributing the melt.

[0026] Furthermore, a main flow channel 9 is provided on the top of the melt diversion guide chamber 6, and the end of the main flow channel 9 away from the melt diversion guide chamber 6 is connected to the plastic melt inlet 8. The melt can enter the main flow channel 9 on the core rod 3 through the plastic melt inlet 8, and enter the melt diversion guide chamber 6 through the main flow channel 9.

[0027] Furthermore, a guide protrusion 10 is installed at the middle position of the bottom of the melt diversion and diversion cavity 6 , which can guide the melt inside the melt diversion and diversion cavity 6 to the inside of the multiple groups of melt mixing spiral flow channels 5 .

[0028] Furthermore, a filter screen 7 is installed inside the plastic melt inlet 8, and impurities in the melt can be filtered through the filter screen 7.

[0029] Working principle:

[0030] When in use, the melt can enter the mainstream flow guide channel 9 on the core rod 3 through the plastic melt inlet 8, and the impurities in the melt can be filtered through the filter screen 7;

[0031] After the melt enters the melt diversion and diversion cavity 6 through the main flow guide channel 9, it can be diverted to the inside of multiple groups of melt mixing spiral flow channels 5 through the melt diversion and diversion cavity 6. The spiral structure of the melt mixing spiral flow channel 5 allows the melt to impact each other inside the melt mixing spiral flow channel 5, so that the melt can be evenly mixed inside the melt mixing spiral flow channel 5, which is conducive to evenly distributing the melt;

[0032] After the melts in the multiple groups of melt mixing spiral flow channels 5 enter the melt mixing guide chamber 4, since the multiple groups of melt mixing spiral flow channels 5 are arranged opposite to each other, after the melts are ejected from the melt mixing spiral flow channels 5, they can impact each other in the melt mixing guide chamber 4, so that the melts can be mixed again, which is conducive to uniformly mixing the melts, thereby evenly distributing the melts.

[0033] The melt passes through the melt mixing guide cavity 4 and enters the plurality of guide extrusion thin flow channels 11 with smaller inner diameters, and can be extruded inside the guide extrusion thin flow channels 11, thereby increasing the impact force of the melt.

[0034] After the melt enters the melt relaxation cavity 2 with a larger diameter from the flow guide extrusion channel 11, it can be quickly sprayed into the melt relaxation cavity 2, stretched and relaxed inside the melt relaxation cavity 2, and extruded through the melt relaxation discharge channel 12, thereby improving the quality of the blow-molded preforms and greatly improving the pass rate of qualified blow-molded preforms.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A composite flow channel of an extruder die head, comprising a cylinder (1), a core rod (3), a melt mixing guide chamber (4) and a melt diversion guide chamber (6), characterized in that: A core rod (3) is installed inside the cylinder body (1), and a melt diversion and flow guiding chamber (6) is arranged inside the core rod (3); a plastic melt inlet (8) is arranged at the top of one end of the cylinder body (1); a melt mixing and flow guiding chamber (4) is arranged inside the core rod (3); a melt relaxation discharge channel (12) is arranged at the bottom of the core rod (3); and a melt relaxation inner chamber (2) is arranged at the top of the melt relaxation discharge channel (12).

2. The composite flow channel of an extruder die head according to claim 1, characterized in that: The outer side of the melt mixing guide cavity (4) is evenly provided with melt mixing spiral flow channels (5), and the ends of the melt mixing spiral flow channels (5) away from the melt mixing guide cavity (4) are all connected to the melt diversion guide cavity (6).

3. The composite flow channel of an extruder die head according to claim 1, characterized in that: Six groups of diversion extrusion fine flow channels (11) are evenly arranged on the top of the melt relaxation inner cavity (2), and the ends of the diversion extrusion fine flow channels (11) away from the melt relaxation inner cavity (2) are all connected to the melt mixing diversion cavity (4).

4. The composite flow channel of an extruder die head according to claim 2, characterized in that: The melt mixing spiral flow channels (5) are provided in four groups, and the angle between two adjacent groups of melt mixing spiral flow channels (5) is ninety degrees.

5. The composite flow channel of an extruder die head according to claim 1, characterized in that: A main flow guide channel (9) is provided at the top of the melt diversion guide chamber (6), and one end of the main flow guide channel (9) away from the melt diversion guide chamber (6) is connected to the plastic melt inlet (8).

6. The composite flow channel of an extruder die head according to claim 1, characterized in that: A guide block (10) is installed at the middle position of the bottom of the melt diversion and guiding cavity (6).

7. The composite flow channel of an extruder die head according to claim 1, characterized in that: A filter screen (7) is installed inside the plastic melt inlet (8).

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