Novel strip making die head

Abstract

The utility model provides a novel sliver making die head which comprises a discharging pipe, a heat preservation interlayer and a feeding pipe, the two ends of the discharging pipe are open, the heat preservation interlayer is arranged outside the discharging pipe in a sleeved mode, and a sealing state is formed between the heat preservation interlayer and the discharging pipe. The feeding pipe penetrates through the heat preservation interlayer and is connected with the discharging pipe; an oil inlet pipe and an oil return pipe which communicate with the heat preservation interlayer are arranged on the two sides of the heat preservation interlayer correspondingly, blind plates used for sealing the discharging pipe are arranged at the two ends of the discharging pipe, and a discharging hole penetrating through the heat preservation interlayer is formed in the bottom of the discharging pipe; the blind plates are installed at the two ends of the discharging pipe through the sealing flanges, a detachable sealing face is formed through matched installation of the sealing flanges and the blind plates, and the die head can be conveniently cleaned while the sealing performance is guaranteed; the outer side of the discharging pipe is sleeved with the heat preservation interlayer, heat preservation is conducted on the discharging pipe without dead corners, the temperature and the heat transfer area of the wrapping face of the discharging pipe are increased, and polymers in the discharging pipe have good flowability.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder die heads, in particular to a novel strip-making die head. Background Art

[0002] The die head is the main component for polymer molding, usually composed of a feed pipe, a discharge hole, an insulation jacket, etc. It converts the high-temperature and high-viscosity polymer from the extruder and the delivery pump into linear motion, and further gradually generates the necessary molding pressure to ensure the density of the plastic part, thereby obtaining a continuous shape with a similar cross-sectional shape.

[0003] During long-term use, the existing strip-making die will produce gel due to the long-term polymerization reaction inside the discharge pipe, which will cause the die to be blocked and affect production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of strip making die head to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel strip-making die head comprises a discharge pipe, a heat-insulating interlayer and a feed pipe. The discharge pipe is designed to be open at both ends. The heat-insulating interlayer is sleeved on the outside of the discharge pipe and forms a sealed state with the discharge pipe, so that the discharge pipe is insulated without dead angles, the heat-insulating area is increased, the temperature and heat transfer area of ​​the surface wrapped by the discharge pipe are increased, and the polymer inside the discharge pipe has good fluidity; the feed pipe penetrates the heat-insulating interlayer and is connected to the discharge pipe;

[0007] An oil inlet pipe and an oil return pipe connected to the thermal insulation interlayer are respectively arranged on both sides of the thermal insulation interlayer, blind plates for sealing the discharge pipe are arranged at both ends of the discharge pipe, and a discharge hole penetrating the thermal insulation interlayer is arranged at the bottom of the discharge pipe. The high-temperature and high-viscosity polymer enters the discharge pipe from the feed pipe, and the high-temperature oil circulating in the thermal insulation interlayer insulates the polymer, and then flows out from the discharge hole.

[0008] Preferably, a second interlayer is sleeved on the outside of the feed pipe, and the second interlayer is connected to the insulation interlayer through an oil return pipe. The oil feed pipe introduces hot oil into the insulation interlayer. After the insulation interlayer is filled with hot oil, the hot oil flows to the second interlayer through the oil return pipe, and finally flows out from the oil return end on the other side of the second interlayer.

[0009] Preferably, the return oil pipe is connected from one side of the second interlayer and connected from the other side, and the return oil pipe connection end is higher than the return oil pipe connection end, so that the high-temperature oil can insulate the feed pipe and the polymer entering the discharge pipe through the feed pipe maintains good fluidity.

[0010] Preferably, sealing flanges are installed at both ends of the discharge pipe, and the sealing flanges and blind plates are installed to fit each other to seal both ends of the discharge pipe. The sealing flanges and blind plates are connected by multiple bolts to form a detachable sealing surface, which can facilitate the cleaning of the die head while ensuring the sealing performance.

[0011] Preferably, the discharge pipe and the discharge hole are both sealed and connected to the thermal insulation interlayer to prevent oil leakage. Preferably, a feed flange is installed at the end of the feed pipe, and the high-temperature and high-viscosity polymer is connected to the feed pipe through the feed flange. An oil inlet flange is installed at the end of the oil inlet pipe, and oil with a certain temperature is introduced into the oil inlet pipe through the oil inlet flange and flows to the inside of the thermal insulation interlayer. An oil return flange is installed at the end of the oil return pipe to lead the circulated oil out of the thermal insulation interlayer and the second interlayer for reheating. The feed flange, oil inlet flange and oil return flange are all connected to the outside through multiple bolts.

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

[0013] The utility model is provided with blind plates at both ends of the discharge pipe through sealing flanges, and a detachable sealing surface is formed by the cooperative installation of the sealing flange and the blind plate, which can ensure the sealing performance and facilitate the cleaning of the die head; at the same time, a thermal insulation interlayer is sleeved on the outer side of the discharge pipe to insulate the discharge pipe without dead angles, thereby improving the temperature and heat transfer area of ​​the wrapped surface of the discharge pipe, and the polymer inside the discharge pipe has good fluidity; and the die head parts are simple and all are standard parts, and the difficulty of manufacturing and assembling is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model.

[0016] In the figure: 1. discharge pipe; 2. thermal insulation interlayer; 3. feed pipe; 4. oil inlet pipe; 5. oil return pipe; 6. second interlayer; 7. blind plate; 8. discharge hole; 9. sealing flange; 10. feed flange; 11. oil inlet flange; 12. oil return flange. DETAILED DESCRIPTION

[0017] 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.

[0018] Example:

[0019] See also Figure 1 to Figure 2 , the utility model provides a technical solution:

[0020] A novel strip-making die head comprises a discharge pipe 1, a heat-insulating interlayer 2 and a feed pipe 3. The discharge pipe 1 is designed to be open at both ends. The heat-insulating interlayer 2 is sleeved on the outside of the discharge pipe 1 and forms a sealed state with the discharge pipe 1. The discharge pipe 1 is insulated without dead angles, the heat-insulating area is increased, the temperature and heat transfer area of ​​the wrapped surface of the discharge pipe 1 are increased, and the polymer inside the discharge pipe 1 has good fluidity; the feed pipe 3 penetrates the heat-insulating interlayer 2 and is connected to the discharge pipe 1;

[0021] An oil inlet pipe 4 and an oil return pipe 5 connected to the thermal insulation interlayer 2 are respectively arranged on both sides of the thermal insulation interlayer 2, blind plates 7 for sealing the discharge pipe 1 are arranged at both ends of the discharge pipe 1, and a discharge hole 8 penetrating the thermal insulation interlayer 2 is arranged at the bottom of the discharge pipe 1. The high-temperature and high-viscosity polymer enters the discharge pipe 1 from the feed pipe 3, and the high-temperature oil circulating in the thermal insulation interlayer 2 insulates the polymer, and then flows out from the discharge hole 8.

[0022] Specifically, a second interlayer 6 is provided on the outside of the feed pipe 3, and the second interlayer 6 is connected to the thermal insulation interlayer 2 through the oil return pipe 5. The oil feed pipe 4 introduces hot oil into the thermal insulation interlayer 2. After the thermal insulation interlayer 2 is filled with hot oil, the hot oil flows to the second interlayer 6 through the oil return pipe 5, and finally flows out from the oil return end on the other side of the second interlayer 6.

[0023] Specifically, the return oil pipe 5 is connected from one side of the second interlayer 6 and connected from the other side, and the connecting end of the return oil pipe 5 is higher than the connecting end of the return oil pipe 5, so that the oil can insulate the feed pipe 3 and keep the polymer entering the discharge pipe 1 through the feed pipe 3 with good fluidity.

[0024] Specifically, sealing flanges 9 are installed at both ends of the discharge pipe 1. The sealing flanges 9 and the blind plate 7 are adapted to be installed with each other to seal the two ends of the discharge pipe 1. The sealing flanges 9 and the blind plate 7 are connected by multiple bolts to form a detachable sealing surface, which can facilitate the cleaning of the die head while ensuring the sealing performance.

[0025] Specifically, the discharge pipe 1 and the discharge hole 8 are both sealed and connected to the thermal insulation interlayer 2 to prevent oil from leaking out.

[0026] Specifically, a feed flange 10 is installed at the end of the feed pipe 3, and the high-temperature and high-viscosity polymer is connected to the feed pipe 3 through the feed flange 10. An oil inlet flange 11 is installed at the end of the oil inlet pipe 4, and oil with a certain temperature is introduced into the oil inlet pipe 4 through the oil inlet flange 11 and flows to the inside of the thermal insulation interlayer 2. An oil return flange 12 is installed at the end of the return pipe 5, and the circulated oil is led out of the thermal insulation interlayer 2 and the second interlayer 6 for reheating. The feed flange 10, the oil inlet flange 11 and the oil return flange 12 are all connected to the outside through multiple bolts.

[0027] When the utility model is used, the two ends of the discharge pipe 1 are first sealed by installing the sealing flange 9 and the blind plate 7 together, and the feed pipe 3 is connected to the external feed port through the feed flange 10, and the return oil pipe 5 is connected to the external oil storage device through the return oil flange 12, and the oil inlet pipe 4 is connected to the hot oil through the oil inlet flange 11, and the hot oil flows into the insulation interlayer 2 outside the discharge pipe 1 through the oil inlet pipe 4, and after the insulation interlayer 2 is filled, it flows into the second interlayer 6 outside the feed pipe 3 through the return oil pipe 5, and after the second interlayer 6 is filled, it returns to the second interlayer 6 through the return oil pipe 5 on the other side of the second interlayer 6. The oil flows into the external oil storage tank, is reheated, and then flows into the mold head through the oil inlet pipe 4 to circulate and insulate the mold head. The oil can be used to insulate the feed pipe 3 and the discharge pipe 1, so that the polymer entering the discharge pipe 1 through the feed pipe 3 and the polymer inside the discharge pipe 1 maintain good fluidity; when the gel produced by the long-term material polymerization reaction inside the discharge pipe 1 blocks the discharge hole 8, the machine can be stopped, the blind plate 7 sealed with the sealing flange 9 at both ends of the discharge pipe 1 is opened, and the inside of the discharge pipe 1 and the discharge hole 8 are cleaned.

[0028] The remaining undescribed parts of the present invention may be the same as the prior art, or are well-known technologies, or may be implemented by using the prior art, and will not be described in detail herein.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of strip making die head, characterized by: The invention comprises a discharge pipe (1), a heat-insulating interlayer (2) and a feed pipe (3); the discharge pipe (1) has openings at both ends; the heat-insulating interlayer (2) is sleeved outside the discharge pipe (1) and forms a sealed state with the discharge pipe (1); the feed pipe (3) penetrates the heat-insulating interlayer (2) and is connected to the discharge pipe (1); An oil inlet pipe (4) and an oil return pipe (5) connected to the thermal insulation interlayer (2) are respectively arranged on both sides of the thermal insulation interlayer (2); blind plates (7) for sealing the discharge pipe (1) are arranged at both ends of the discharge pipe (1); and a discharge hole (8) penetrating the thermal insulation interlayer (2) is arranged at the bottom of the discharge pipe (1); a high-temperature and high-viscosity polymer enters the discharge pipe (1) from the feed pipe (3); the high-temperature oil circulating in the thermal insulation interlayer (2) insulates the polymer, and the polymer flows out from the discharge hole (8).

2. A novel strip making die head according to claim 1, characterized in that: The outer side of the feed pipe (3) is provided with a second interlayer (6), and the second interlayer (6) is connected to the heat-insulating interlayer (2) via an oil return pipe (5).

3. A new type of strip making die head according to claim 2, characterized in that: The oil return pipe (5) is connected from one side of the second interlayer (6) and is connected from the other side, and the connecting end of the oil return pipe (5) is higher than the connecting end of the oil return pipe (5).

4. A novel strip making die head according to claim 1, characterized in that: Sealing flanges (9) are installed at both ends of the discharge pipe (1), and the sealing flanges (9) and the blind plates (7) are installed in a mutually adaptable manner to seal the two ends of the discharge pipe (1).

5. A novel strip making die head according to claim 1, characterized in that: The discharge pipe (1) and the discharge hole (8) are both sealed and connected to the thermal insulation interlayer (2).

6. A novel strip making die head according to claim 1, characterized in that: The end of the feed pipe (3) is provided with a feed flange (10), the end of the oil feed pipe (4) is provided with an oil feed flange (11), and the end of the oil return pipe (5) is provided with an oil return flange (12).

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