CN211994126U

CN211994126U - PP pipe orifice mold and PP pipe orifice mold assembly with same

Info

Publication number: CN211994126U
Application number: CN202020138037.1U
Authority: CN
Inventors: 阮洪良; 严绍彬; 邵建兴
Original assignee: ZHEJIANG RUAN'S PLASTIC INDUSTRY CO LTD
Current assignee: ZHEJIANG RUAN'S PLASTIC INDUSTRY CO LTD
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-11-24
Anticipated expiration: 2030-01-21

Abstract

The utility model provides a PP outside of tubes bush and have its PP mouth of pipe mould subassembly. A PP tube external die comprising a tube body, the tube body comprising a first section, a second section, and a first connecting section connecting the first section and the second section; the first section has a tube wall inside diameter that is less than the tube wall inside diameter of the second section. The middle part of the outer die of the PP pipe is changed to correspond to the inner die, and when materials pass through the middle part and the outlet part in the production process, the flow rates of the materials are almost the same, so that the difference of the flow rate change between the two parts is not large, and the die block is not damaged due to the fact that the pressure of one part is too large.

Description

PP pipe orifice mold and PP pipe orifice mold assembly with same

Technical Field

The utility model relates to a PP pipe shaping field especially relates to a PP outside of tubes bush and have its PP mouth of pipe mould subassembly.

Background

As shown in fig. 1 and 2, most of the PP-tube outside die 20 currently used in the plant is inside the PP-tube module 40. The outer die 20 and the module 40 of the PP pipe are relatively close and have small clearance. And the outer wall of the outer port die 20 is straight, the inner port die 30 has a relatively smaller diameter at the middle portion. This results in a large flow just after the raw material passes through the middle of the PP tube orifice die, and a small flow suddenly passes through the outlet, so that the flow rate at that part of the outlet is increased, the pressure on the die is increased, and the die is easily damaged. The position of the PP pipe forming machine and the position of the PP pipe extruding machine are not absolutely parallel, the clearance between the PP pipe orifice die and the module is small, and the length of the PP pipe orifice die and the PP pipe extruding machine is long. If there is a slight deviation, the die block will be molded with the PP tube orifice to cause collision friction, resulting in damage to the die block or die.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect of at least one of current PP pipe bush, providing a PP outside of tubes bush and have its PP mouth of pipe mould subassembly.

In particular, in one aspect, the present invention provides a PP pipe external die, comprising a pipe body, wherein the pipe body comprises a first section, a second section, and a first connecting section connecting the first section and the second section; the first section has a tube wall inside diameter that is less than the tube wall inside diameter of the second section.

Further, the tube wall outer diameter of the first section is smaller than the tube wall outer diameter of the second section.

Further, the first connecting section has a trapezoidal longitudinal cross-sectional profile.

On the other hand, the utility model also provides a PP mouth of pipe mould subassembly, it includes the intraductal bush of PP and any kind of above-mentioned outside of tubes bush of PP, outside of tubes bush of PP adorn in the intraductal bush of PP.

Optionally, the PP tube inner die comprises a third section, a fourth section, and a second connecting section connecting the third section and the fourth section;

the third section is arranged on the inner side of the first section, the fourth section is arranged on the inner side of the second section, and the second connecting section is arranged on the inner side of the first connecting section; and is

The diameter of the third section is smaller than the diameter of the fourth section.

Optionally, a distance between the fourth section and the second section is less than or equal to a distance between the third section and the first section.

Optionally, the distance between the fourth section and the second section is 4/5 to 6/5 of the distance between the third section and the first section.

Optionally, the second connecting section has a trapezoidal longitudinal cross-sectional profile.

The embodiment of the utility model provides a following technological effect has: the middle part of the outer die of the PP pipe is changed to correspond to the inner die, and when materials pass through the middle part and the outlet part in the production process, the flow rates of the materials are almost the same, so that the difference of the flow rate change between the two parts is not large, and the die block is not damaged due to the fact that the pressure of one part is too large.

Furthermore, after the diameter of the middle part of the outer die of the PP pipe is shortened, the outer diameter of the middle part of the outer die of the PP pipe is correspondingly reduced, and the gap between the middle part of the outer die of the PP pipe and the module is relatively increased, so that the adjustable position is relatively widened, and the probability of damage caused by collision between the die and the module is greatly reduced.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic partial structural view of a PP pipe forming apparatus in the prior art;

FIG. 2 is a schematic enlarged view at A in FIG. 1;

FIG. 3 is a schematic partial structure diagram of an external die of a PP pipe provided by an embodiment of the invention;

fig. 4 is a schematic partial structural view of a PP orifice die assembly provided by an embodiment of the present invention;

fig. 5 is a schematic partial structure diagram of a PP pipe forming device provided in an embodiment of the present invention;

fig. 6 is a schematic enlarged view at B in fig. 5.

Detailed Description

Fig. 3 is a schematic partial structure diagram of a PP pipe external die provided by an embodiment of the present invention, as shown in fig. 3, and referring to fig. 4 to 6, an embodiment of the present invention provides a PP pipe external die 20, including a pipe body. The pipe body comprises a first section 21, a second section 22, and a first connecting section 23 connecting the first section 21 and the second section 22; the first section 21 has a smaller tube wall inside diameter than the second section 22. The middle part (namely the first section 21) of the outer die 20 of the PP pipe is changed to correspond to the inner die 30, so that the flow rate of materials passing through the middle part and the outlet part (namely the second section 22) is almost the same during the production process, the difference of the flow rate change between the two parts is not large, and the damage to the module caused by the excessive pressure of a certain part is avoided.

In some embodiments of the present invention, the outer diameter of the tube wall of the first section 21 is smaller than the outer diameter of the tube wall of the second section 22. The first connecting section 23 has a trapezoidal longitudinal cross-sectional profile. After the diameter of the middle portion of the outer die 20 of the PP tube is shortened, the outer diameter of the middle portion of the outer die 20 of the PP tube is correspondingly reduced, and the gap between the middle portion and the module is relatively increased, so that the adjustable position is relatively widened, and the probability of damage caused by collision between the die and the module 40 is greatly reduced. Further, a plurality of ribs extending along the axial direction of the tube body may be uniformly distributed on the inner wall of the second section 22.

Fig. 4 is a schematic partial structure diagram of a PP pipe orifice die assembly provided by an embodiment of the present invention, as shown in fig. 4 and referring to fig. 5 and 6, an embodiment of the present invention further provides a PP pipe orifice die assembly, which includes a PP pipe inner die 30 and a PP pipe outer die 20 in any of the above embodiments, wherein the PP pipe outer die 20 is sleeved on the PP pipe inner die 30.

Preferably, the PP tube inner die 30 comprises a third section 31, a fourth section 32, and a second connecting section 33 connecting the third section 31 and the fourth section 32. The third section 31 is disposed inside the first section 21, the fourth section 32 is disposed inside the second section 22, and the second connecting section 33 is disposed inside the first connecting section 23. The diameter of the third section 31 is smaller than the diameter of the fourth section 32. The second connecting section 33 has a trapezoidal longitudinal cross-sectional profile.

For example, in some embodiments, the distance between the fourth section 32 and the second section 22 is less than or equal to the distance between the third section 31 and the first section 21. The distance between the fourth section 32 and the second section 22 is 4/5 to 1 of the distance between the third section 31 and the first section 21. In other embodiments, the distance between the fourth section 32 and the second section 22 may be less than or equal to or greater than the distance between the third section 31 and the first section 21, for example, the distance between the fourth section 32 and the second section 22 is 4/5-6/5 of the distance between the third section 31 and the first section 21, so that the material can pass through the middle part and the outlet part (i.e., the second section 22) in a small amount, thereby not causing a large difference in flow rate change between the two parts.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A PP tube outer die comprising a tube body, wherein said tube body comprises a first section, a second section, and a first connecting section connecting said first section and said second section; the first section has a tube wall inside diameter that is less than the tube wall inside diameter of the second section.

2. The PP tube outer die of claim 1,

the first section has a tube wall outer diameter that is less than a tube wall outer diameter of the second section.

3. The PP tube outer die of claim 2,

the first connecting section has a trapezoidal longitudinal cross-sectional profile.

4. A PP pipe orifice die assembly comprising a PP pipe inner orifice die and a PP pipe outer orifice die as recited in claim 1, 2 or 3, said PP pipe outer orifice die being fitted to said PP pipe inner orifice die.

5. The PP spout die assembly of claim 4,

the inner die of the PP pipe comprises a third section, a fourth section and a second connecting section for connecting the third section and the fourth section;

6. The PP spout die assembly of claim 5,

a distance between the fourth section and the second section is less than or equal to a distance between the third section and the first section.

7. The PP spout die assembly of claim 5,

the distance between the fourth section and the second section is 4/5-6/5 of the distance between the third section and the first section.

8. The PP spout die assembly of claim 5,

the second connecting section has a trapezoidal longitudinal cross-sectional profile.