Screw structure of a foaming machine

Abstract

The utility model discloses a screw structure of foaming machine, including screw and with the fixed rotary joint of screw, its characterized in that: the inner hole is equipped with in the screw, the inner tube and outer tube are equipped with in the inner hole, and the inner tube and outer tube all are connected with the rotary joint, the loop is formed between the inner tube and outer tube, one end of the inner tube is communicated with the rotary joint's inlet hole, the other end of the inner tube is communicated with the inner hole, one end of the loop is communicated with the rotary joint's outlet hole, the other end of the loop is communicated with the inner hole, and the heating liquid passes the inlet hole and the inner tube of rotary joint and enters the inner hole and heats and then flows out through the loop and the outlet hole. The above structure plays the purpose of heating screw, thereby guaranteeing that the molten foaming material does not reduce temperature when contacting with screw, thereby influencing the extrusion effect.

Description

Technical Field

[0001] This utility model relates to a foaming machine, and more particularly to a screw structure for a foaming machine. Background Technology

[0002] PVC foamed boards are widely used in building materials, advertising, and other industries. Their production process mainly includes mixing and batching → extrusion → molding → surface treatment → cutting → warehousing. This requires a plastic extruder, and the foaming extrusion screw is a crucial component of the extruder for plasticizing and extruding the material.

[0003] Ordinary foaming extrusion screws do not have a heating structure in the screw, which causes the molten foaming material to lose heat and lower the temperature when it comes into contact with the screw, thus affecting the extrusion effect. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a screw structure for a foaming machine.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A screw structure for a foaming machine includes a screw and a rotary joint fixed to the screw. The screw has an inner bore, within which are an inner tube and an outer tube, both connected to the rotary joint. A circuit is formed between the inner and outer tubes. One end of the inner tube communicates with the inlet of the rotary joint, and the other end communicates with the inner bore. One end of the circuit communicates with the outlet of the rotary joint, and the other end communicates with the inner bore. Heated liquid enters the inner bore through the inlet of the rotary joint and the inner tube for heating, and then flows out through the circuit and the outlet.

[0007] The inner tube is provided with several partition plates.

[0008] The inner tube includes tube one and tube two. Tube one is fixed in the inner hole by support member one, and tube two and the outer tube are both fixed in the inner hole by support member two.

[0009] The second support includes a second hole and a plurality of second return holes arranged around the second hole. The end of the second pipe is sealed to the second hole, and the second return holes are connected to the inner hole.

[0010] The support member includes a socket, the bottom of which is provided with a hole and a plurality of first return holes arranged around the hole. The first return holes are connected to the circuit and the second return holes. One end of the outer tube is inserted into the socket, and the end of the tube is sealed to the hole. The other end of the tube is connected to a rotary joint.

[0011] The screw includes screw one and screw two. Screw one has an internally threaded pipe hole at its end. Screw two has a threaded connecting rod at its end that connects to the internally threaded pipe hole. The bottom of the internally threaded pipe hole has a mounting hole one. Support one is installed in mounting hole one. The end of the threaded connecting rod has a mounting hole two. Support two is installed in mounting hole two.

[0012] The screw is sequentially provided with a double thread group, a single thread group one, a single thread group two, a multi-thread group one, a single thread group three, and a multi-thread group two.

[0013] The screw is equipped with stirring rods, which are distributed among the threads of the single thread group.

[0014] The threads of the multi-thread group one and multi-thread group two are evenly distributed with several spacers, thereby dividing the threads into several rhomboid blocks.

[0015] The single thread group three has a notch on its thread.

[0016] The beneficial effects of this utility model are as follows: The screw has an inner hole, within which are an inner tube and an outer tube, both connected to the rotary joint. A circuit is formed between the inner and outer tubes. One end of the inner tube communicates with the inlet of the rotary joint, and the other end communicates with the inner hole. One end of the circuit communicates with the outlet of the rotary joint, and the other end communicates with the inner hole. The heating liquid enters the inner hole through the inlet of the rotary joint and the inner tube for heating, and then flows out through the circuit and the outlet, thereby heating the screw and ensuring that the molten foaming material does not cool down when in contact with the screw, thus affecting the extrusion effect. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural view of the present invention;

[0019] Figure 2 This is a cross-sectional structural view of the present invention;

[0020] Figure 3 This is a structural view of the screw;

[0021] Figure 4 This is a structural view of the inner and outer tubes;

[0022] Figure 5 yes Figure 2 An enlarged structural view at point A;

[0023] Figure 6 This is an enlarged structural view of a section of a multi-threaded assembly;

[0024] Figure 7 This is a view of the separated structure of the support component. Detailed Implementation

[0025] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0026] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0027] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0028] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0029] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0030] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from this disclosure.

[0031] scope.

[0032] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0033] Reference Figure 1 , Figure 2 This utility model discloses a screw structure for a foaming machine, including a screw 1 and a rotary joint (not shown in the figure) fixed to the screw 1. The screw 1 is driven by a drive device 2. The screw 1 is provided with a sleeve 3, which is fixed to the housing of the drive device 2. The sleeve 3 has a feed port 4. The drive device 2 and the sleeve 3 are existing technologies and are not improvements of this application, so their specific structures are not described in detail.

[0034] As shown in the figure, the screw 1 has an inner hole 5, and an inner tube 6 and an outer tube 7 are provided in the inner hole 5. Both the inner tube 6 and the outer tube 7 are connected to the rotary joint. The screw 1 is located on one side of the drive device 2 and the rotary joint is located on the other side of the drive device 2. Because the output shaft of the drive device 2 is a hollow shaft, the inner tube 6 and the outer tube 7 can pass through the hollow shaft and be fixed to the rotary joint. The rotary joint is fixed to the housing of the drive device 2 by a flange and screws. The inner tube 6 and the outer tube 7 rotate together with the screw 1. The rotary joint is a standard part. Its interior can rotate, but its exterior does not. The specific structure and its installation connection structure are not described in detail.

[0035] The inner tube 6 and the outer tube 7 form a circuit 8. One end of the inner tube 6 is connected to the inlet of the rotary joint, and the other end of the inner tube 6 is connected to the inner hole 5. One end of the circuit 8 is connected to the outlet of the rotary joint, and the other end of the circuit 8 is connected to the inner hole 5. The heating liquid enters the inner hole 5 through the inlet of the rotary joint and the inner tube 6 for heating, and then flows out through the circuit 8 and the outlet. The outer tube of the rotary joint is connected to the circulating pump and the heating furnace, so that the circulating pump can draw hot oil from the heating furnace and send it into the inner tube 6 through the inlet of the rotary joint until it reaches the predetermined position of the inner hole 5 of the screw 1, thereby heating that section of the screw 1. The heated oil flows back to the heating furnace for heating through the circuit 8 and the outlet of the rotary joint, thus forming a circulation. Of course, the heating furnace and the circulating pump are purchased equipment, so the specific structure is not described in detail.

[0036] As shown in the figure, the inner tube 6 is provided with several spacer plates 9. The spacer plates 9 can be welded to the inner tube 6. Then, one end of the spacer plate 9 abuts against the wall of the inner hole 5, thereby keeping the position of the inner tube 6 in the middle of the inner hole 5. Because the inner tube 6 is relatively long, spacer plates 9 are set at some required positions. Generally, three spacer plates 9 are evenly distributed around the inner tube 6 at each position.

[0037] As shown in the figure, for ease of manufacturing, the screw 1 described in this application is composed of a screw 100, a screw 2 101, a screw 3 102, and a screw 4, forming a 103. The screws 1 are fixed together by a threaded connection. The end of the screw 100 is provided with an internally threaded pipe hole, and the end of the screw 2 101 is provided with a threaded connecting rod 10 that connects to the internally threaded pipe hole. The bottom of the internally threaded pipe hole is provided with a mounting hole 1, and the support member 11 is located in the mounting hole 1. The end of the threaded connecting rod 10 is provided with a mounting hole 2, and the support member 2 12 is installed in the mounting hole 2 by screws. The support member 2 12 is positioned by the mounting hole 2, and then the support member 11 is fixed to the support member 2 12 by screws. When the screw 100 and the screw 2 101 are connected together by threads, the support member 11 will be embedded in the mounting hole 1 and connected.

[0038] Specifically, the inner tube 6 includes a first tube 61 and a second tube 62. The first tube 61 is fixed in the inner hole 5 by a first support member 11. The second tube 62 and the outer tube 7 are both fixed in the inner hole 5 by a second support member 12. The above structure is also for ease of manufacturing. The second support member 12 includes a second hole and a plurality of second return holes 13 arranged around the second hole. The end of the second tube 62 is sealed to the second hole. The second return holes 13 are connected to the inner hole 5. The first support member 11 includes an insertion hole. The bottom of the insertion hole is provided with a first hole and a plurality of first return holes 14 arranged around the first hole. The first return holes 14 are connected to the circuit 8 and the second return holes 13. One end of the outer tube 7 is inserted into the insertion hole, and the end of the first tube 61 is sealed to the first hole. The other end of the first tube 61 is connected to a rotary joint. The above structure realizes the fixation and connection of the first tube 61, the second tube 62, the outer tube 7, the first support member 11 and the second support member 12.

[0039] As shown in the figure, the screw 1 is sequentially provided with a double thread group 15, a single thread group one 16, a multi-thread group one 17, a single thread group two 18, and a multi-thread group two 19. As soon as the foaming material enters the sleeve 3, it is quickly fed to the second section through the threads of the first double thread group 15. The second section uses the single thread group one 16, which uses a single thread. Its bottom diameter is smaller than that of the first section, and its pitch is larger than that of the first section, thus providing greater pressure to the foaming material. Moreover, this section of the screw 1 is also the heating section of this application. Through the above means, it is ensured that the foaming material will not stay in one position. In addition, the screw 1 is provided with a stirring rod 20, which is distributed between the threads of the single thread group one 16. The cylindrical stirring rod 20 ensures that the foaming material is mixed more evenly. Then it is sent to the third section, which is a multi-threaded assembly 17 with a relatively small pitch. This section also increases the pressure on the foaming material. The multi-threaded assembly 17 has several spacers 21 evenly distributed on its threads, which divides the threads into several diamond-shaped blocks. This allows the foaming material to be mixed evenly. Then the foaming material enters the fourth section, a single-threaded assembly 28. The single-threaded assembly 28 is not heated, so the foaming material can be slightly cooled in this section. The single-threaded assembly 28 has notches 22 on its threads to prevent excessive thrust and excessively fast material feeding. Finally, the foaming material enters the fifth section, a multi-threaded assembly 29. The multi-threaded assembly 29 has several spacers 21 evenly distributed on its threads, which divides the threads into several diamond-shaped blocks. This allows the foaming material to be mixed evenly before discharge.

[0040] The screw structure of a foaming machine provided by the embodiments of this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A screw structure of a foaming machine comprising a screw and a rotary joint fixed to the screw, characterized in that: The screw has an inner hole, in which an inner tube and an outer tube are provided, and both the inner tube and the outer tube are connected to the rotary joint. The inner tube and the outer tube form a circuit. One end of the inner tube is connected to the inlet of the rotary joint, and the other end of the inner tube is connected to the inner hole. One end of the circuit is connected to the outlet of the rotary joint, and the other end of the circuit is connected to the inner hole. The heated liquid enters the inner hole through the inlet of the rotary joint and the inner tube for heating, and then flows out through the circuit and the outlet.

2. A screw configuration for a foaming machine according to claim 1, characterized in that: The inner tube is provided with several partition plates.

3. A screw configuration for a foaming machine according to claim 1, characterized in that: The inner tube includes tube one and tube two. Tube one is fixed in the inner hole by support member one, and tube two and the outer tube are both fixed in the inner hole by support member two.

4. A screw configuration for a foaming machine according to claim 3, wherein: The second support includes a second hole and a plurality of second return holes arranged around the second hole. The end of the second pipe is sealed to the second hole, and the second return holes are connected to the inner hole.

5. A screw configuration for a foaming machine according to claim 4, wherein: The support member includes a socket, the bottom of which is provided with a hole and a plurality of first return holes arranged around the hole. The first return holes are connected to the circuit and the second return holes. One end of the outer tube is inserted into the socket, and the end of the tube is sealed to the hole. The other end of the tube is connected to a rotary joint.

6. A screw configuration for a foaming machine according to claim 3, wherein: The screw includes screw one and screw two. Screw one has an internally threaded pipe hole at its end. Screw two has a threaded connecting rod at its end that connects to the internally threaded pipe hole. The bottom of the internally threaded pipe hole has a mounting hole one. Support one is installed in mounting hole one. The end of the threaded connecting rod has a mounting hole two. Support two is installed in mounting hole two.

7. A screw configuration for a foaming machine according to claim 1, characterized in that: The screw is sequentially provided with a double thread group, a single thread group one, a single thread group two, a multi-thread group one, a single thread group three, and a multi-thread group two.

8. A screw configuration for a foaming machine according to claim 6, wherein: The screw is equipped with stirring rods, which are distributed among the threads of the single thread group.

9. A screw configuration for a foaming machine according to claim 7, characterized in that: The threads of the multi-thread group one and multi-thread group two are evenly distributed with several spacers, thereby dividing the threads into several rhomboid blocks.

10. A screw configuration for a foaming machine according to claim 7, characterized in that: The single thread group three has a notch on its thread.

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