WO2022016640A1

WO2022016640A1 - Double-layer hollow pipe mold

Info

Publication number: WO2022016640A1
Application number: PCT/CN2020/109462
Authority: WO
Inventors: 刘秦元; 郑敏君; 叶伟东
Original assignee: 临海伟星新型建材有限公司
Priority date: 2020-07-21
Filing date: 2020-08-17
Publication date: 2022-01-27
Also published as: CN112123733A

Abstract

The present invention provides a double-layer hollow pipe mold, comprising an inlet mold. One end of the inlet mold is fixedly connected to a flow dividing device, and a first core mold is mounted on the face, deviating from the inlet mold, of the flow dividing device; a first middle mold is sleeved on the first core mold, and a first outer mold used for pressing and holding the first middle mold is sleeved on the first middle mold; a second core mold is mounted at the end, away from the flow dividing device, of the first core mold; a second middle mold matching the first middle mold is sleeved on the second core mold; and a second outer mold used for pressing and holding the second middle mold is sleeved on the second middle mold. Compared with the prior art, the present invention has the following beneficial effect: a double-layer hollow pipe made of double materials can be conveniently machined.

Description

A double-layer hollow tube mold

technical field

The invention relates to a double-layer hollow tube mould, which belongs to the technical field of extrusion of polymer materials.

Background technique

At present, some polymer material pipes such as plastic pipes are widely used due to their advantages of hygiene, light weight, low resistance and reliable connection. The pipeline has obvious advantages in cold insulation and noise reduction, and can prevent the medium from leaking out of the entire pipeline when the inner pipe is ruptured due to icing, excessive pressure and other factors, and can also judge the leakage of the inner pipe by detecting the inner pressure of the outer pipe . The double-layer hollow pipes with different inner and outer layer materials can be optimized according to the internal and external use conditions of the above-mentioned hollow pipes, such as the inner layer heat-resistant and hygienic, and the outer layer anti-ultraviolet and anti-corrosion and aging characteristics. Production and processing of molds for double-layer hollow tubes with different inner and outer layers.

SUMMARY OF THE INVENTION

In view of the gaps in the prior art, the purpose of the present invention is to provide a double-layer hollow tube mold to solve the above-mentioned problems in the background art.

In order to achieve the above object, the present invention is achieved through the following technical solutions: a double-layer hollow tube mold, including an inlet mold, one end of the inlet mold is fixedly connected to a shunt device, and the side of the shunt device away from the inlet mold is installed with A first core mold, a first middle mold is sleeved on the first core mold, a first outer mold for pressing and holding the first middle mold is sleeved on the first middle mold, and the first outer mold is set In the shunt device, the first outer mold is sleeved with a first pressing plate for pressing and holding the first outer mold. The outer surface of one end of the shunt device away from the inlet die is provided with a plurality of first threaded holes in a ring shape at an equal distance, and a first adjustment bolt is engaged in each of the first threaded holes, and the first core mold is far away from the shunt device. A second core mold is installed on one end, the second core mold is sleeved with a second middle mold matched with the first middle mold, and the second middle mold is sleeved with a first middle mold for pressing and holding the second middle mold. Two outer molds, the second outer mold is set in the first pressing plate, the second outer mold is sleeved with a second pressing plate for pressing the position of the second outer mold, the second pressing plate is The plate is fixedly connected to the first pressing plate through connecting screws, and the outer surface of one end of the first pressing plate away from the shunt device is provided with a plurality of second threaded holes in a ring shape at an equal distance, and the inner surfaces of the plurality of the second threaded holes are equidistant. A second adjustment bolt is engaged.

Further, the shunt device includes a shunt die, the shunt die is fixedly connected to the inlet die through screws, the side of the shunt die facing away from the inlet die is fixedly connected to the shunt outer die, and the shunt outer die is provided with a shunt middle die, A split core mold is arranged in the split middle mold.

Further, a third threaded hole is machined on the side of the split core mold facing the first core mold, and a threaded column matched with the third threaded hole is fixed on the side of the first core mold facing the split core mold. The post is engaged in the third threaded hole.

Further, a third threaded hole is processed on the side of the split core mold facing the first core mold, and a first through hole matched with the third threaded hole is opened on the side of the first core mold facing the split core mold, so the The side of the second core mold facing the first core mold is provided with a second through hole matched with the first through hole, a connecting screw is arranged in the second through hole, and the connecting screw is engaged through the first through hole in the third threaded hole.

The beneficial effects of the present invention are as follows: 1. It can realize the continuous production of hollow tubes with different specifications and different materials for the inner and outer layers; it can realize that the wall thickness uniformity of the inner and outer layers can be adjusted during online production; Consistent; the number of support ribs can be selected according to needs; it can meet different pipe cross-sectional shapes.

2. The cavity filling of the support ribs is completed at the same time when the specifications are adjusted, which ensures the compactness of the product and prevents the generation of air bubbles.

3. Under the same cross-sectional shape, only the second middle mold, the second core mold, and the second outer mold at the end need to be replaced to replace the tube specifications, and the rest remain unchanged, which is convenient and quick.

4. The flow channel is smooth and smooth, and combined with the appropriate inlet die and shunt device, it can be adapted to the extrusion of various polymer materials.

5. Realize that the support rib runs through the entire wall thickness of the pipe, so as to provide functions such as punching on the rib, internal and external conduction, and position identification of the support rib when the pipes are connected.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

1 is a schematic structural diagram of Embodiment 1 of the present invention;

Fig. 2 is the perspective view of the second middle mold in a kind of double-layer hollow tube mold of the present invention;

Fig. 3 is a cross-sectional view of the double-layer hollow tube formed by the second middle mold in Fig. 2;

4 is a schematic structural diagram of Embodiment 3 of the present invention;

Fig. 5 is the perspective view of the second middle mold in Fig. 4;

FIG. 6 is a cross-sectional view of the double-layer hollow tube formed by the second middle mold in FIG. 5;

7 is a schematic structural diagram of Embodiment 4 of the present invention;

Fig. 8 is the perspective view of the second middle die in Fig. 7;

FIG. 9 is a cross-sectional view of the double-layer hollow tube formed by the second middle mold in FIG. 8;

10 is a schematic structural diagram of Embodiment 5 of the present invention;

Figure 11 is a perspective view of the second middle die in Figure 10;

Figure 12 is a cross-sectional view of the double-layer hollow tube formed by the second middle die in Figure 11;

In the figure: 1-inlet die, 2-splitting device, 3-first core die, 4-first middle die, 5-first outer die, 6-first compression plate, 7-second core die, 8 -Second pressing plate, 9-Second middle die, 10-Second outer die, 11-First adjusting bolt, 12-Second adjusting bolt.

detailed description

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

Embodiment 1: Please refer to FIG. 1 to FIG. 3, the present invention provides a technical solution: a double-layer hollow tube mold, including an inlet mold 1, one end of the inlet mold 1 is fixedly connected to a shunt device 2, and the two strands of melt are separated from each other. After the entrance of the inlet mold 1 enters, two uniformly flowing annular material flows are formed in the inner and outer layers through the channels of the distribution device 2 respectively. The inlet mold 1 and the flow distribution device 2 may be the same mold body, or may be composed of a single mold body or a plurality of mold bodies respectively.

A first core mold 3 is installed on the side of the shunt device 2 facing away from the inlet mold 1 , the first core mold 3 is sleeved with a first middle mold 4 , and the first middle mold 4 is sleeved with a press for holding the first middle mold 4 . The first outer mold 5, the first outer mold 5 is arranged in the shunt device 2, through the channel of the shunt device 2, two evenly flowing annular material flows of the inner and outer layers are formed, and the outer layer melt bypasses the first middle mold 4 to flow. Through the flow channel between the first middle mold 4 and the first outer mold 5 and adjust the size specifications, the inner layer melt flows through the flow channel between the first middle mold 4 and the first core mold 3 and adjust the size specifications, then The inner layer and the outer layer are extruded together into the structure composed of the second outer mold 10 , the second middle mold 9 and the second core mold 7 .

The first outer mold 5 is sleeved with a first pressing plate 6 for pressing and holding the first outer mold 5. The first pressing plate 6 is fixedly connected with the splitting outer mold of the shunt device 2 through connecting screws. The first pressing plate 6 plays the role of pressing the first outer mold 5 .

The outer surface of one end of the diverting device 2 away from the inlet die is provided with a number of first threaded holes in a ring shape at equal distances, and the first adjustment bolts 11 are engaged in each of the first threaded holes. When the thickness of the pipe wall is different, the position of the first outer mold 5 is adjusted by using the first adjusting bolts 11 in the first threaded holes, so that the outer pipe wall thickness of the double-layer hollow pipe is uniform.

One end of the first core mold 3 away from the shunt device 2 is installed with a second core mold 7 , the second core mold 7 is sleeved with a second middle mold 9 that cooperates with the first middle mold 4 , and the second middle mold 9 is sleeved There is a second outer mold 10 for pressing the second middle mold 9, the second outer mold 10 is arranged in the first pressing plate 6, and flows into the second outer mold 10, the second middle mold 9 and the second core mold 7 The outer layer melt in the composition structure flows through the flow channel between the second middle mold 9 and the second outer mold 10 and adjusts the size specifications, and the inner layer melt flows between the second middle mold 9 and the second core mold 7 The flow channel is adjusted and the size specification is adjusted. The shape of the support rib includes the interface with the inner layer or the outer layer formed by forced distribution, and the inner layer or outer layer melt flows through the second middle mold 9 to fill the reserved space of the second middle mold 9. The cavity and the outer layer or the inner layer are melt-compounded and formed, and then the inner layer, outer layer and support ribs are extruded into the die together.

The second outer mold 10 is sleeved with a second pressing plate 8 for pressing the position of the second outer mold 10. The second pressing plate 8 is fixedly connected to the first pressing plate 6 through connecting screws. The second pressing plate 8 plays the role of pressing the second outer mold 10 .

The outer surface of one end of the first pressing plate 6 away from the shunt device 2 is provided with a plurality of second threaded holes in a ring shape at an equal distance, and a second adjusting bolt 12 is engaged in each of the plurality of second threaded holes. When the wall thickness of the inner tube of the hollow tube is different, use the second adjusting bolts 12 in the second threaded holes to adjust the position of the second outer die 10, so that the wall thickness of the outer tube of the double-layer hollow tube is uniform. , the cross-sectional shape of the pipe can be adjusted by changing the shape of the flow channel of the second core mold 7, the second middle mold 9 and the second outer mold 10. The second middle mold 9 is used as the core part of the forming, and its cavity can determine the number of support ribs, material and When the supporting rib material is consistent with the inner tube, it is preferable that the first middle mould 4 is fixed and the first outer mould 5 is adjustable, corresponding to the wall thickness of the outer tube; the second middle mould 9 is opposite to the second outer mould 10 Fixed, adjustable together, corresponding to the wall thickness of the inner tube; when the material of the support rib is the same as the outer tube, preferably, the first outer mold 5 is fixed and the first middle mold 4 is adjustable, corresponding to the wall thickness of the inner tube; the second The middle mold 9 and the second core mold 7 are fixed without adjustment, and the second outer mold 10 is adjustable, corresponding to the wall thickness of the outer tube. The outer layer mold body at the end is not affected by the adjustment of the first outer mold 5 .

The shunt device 2 includes a shunt die, the shunt die is fixedly connected to the inlet die 1 through screws, the side of the shunt die facing away from the inlet die 1 is fixedly connected to the outer shunt die, the outer shunt die is provided with a middle shunt die, and the middle shunt die is provided with a shunt core. Part of the melt that enters the shunt die from the inlet die 1 flows into the runner between the shunt outer die and the shunt middle die, and the other part of the melt flows into the runner between the shunt middle die and the shunt core die, thereby forming inside and outside. Layer two uniformly flowing annular streams.

The side of the split core mold facing the first core mold 3 is machined with a third threaded hole, and the side of the first core mold 3 facing the split core mold is fixed with a threaded column matched with the third threaded hole, and the threaded column is engaged in the third threaded hole. Inside, screw the threaded column on the first core mold 3 into the third threaded hole on the split core mold to realize the fixed connection between the first core mold 3 and the split core mold.

Example 2: The side of the split core mold facing the first core mold 3 is machined with a third threaded hole, and the side of the first core mold 3 facing the split core mold is provided with a first through hole matching the third threaded hole, and the second The side of the core mold 7 facing the first core mold 3 is provided with a second through hole matching the first through hole, a connecting screw is arranged in the second through hole, and the connecting screw passes through the first through hole and engages in the third threaded hole Inside, the connecting screw is screwed through the second through hole and the first through hole into the third threaded hole on the split core mold to realize the fixed connection of the second core mold 7, the first core mold 3 and the split core mold.

Example 3: Please refer to FIGS. 4 to 6 , using the second core mold 7 shown in FIG. 5 , a double-layer hollow tube with the support ribs and the inner tube of the same material can be processed, and the support ribs pass through the outer tube .

Embodiment 4: Please refer to Fig. 7 to Fig. 9. Using the second core mold 7 shown in Fig. 8, a double-layer hollow tube with the support ribs and the outer tube of the same material can be processed, and the support ribs pass through the inner tube. .

Example 5: Please refer to Fig. 10 to Fig. 12. Using the second core mold 7 shown in Fig. 11, a double-layer hollow tube with the support ribs and the outer tube of the same material can be processed, and the support ribs can be fitted on the inner tube surface.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but without departing from the spirit or essential aspects of the present invention. In the case of the characteristic features, the present invention can be implemented in other specific forms. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

A double-layer hollow tube mold, comprising an inlet mold (1), characterized in that: one end of the inlet mold (1) is fixedly connected to a shunt device (2), and the shunt device (2) faces away from the inlet mold (1). A first core mold (3) is installed on one side, a first middle mold (4) is sleeved on the first core mold (3), and a first middle mold (4) is sleeved on the first center mold (4) for pressing and holding the first The first outer mold (5) of the middle mold (4), the first outer mold (5) is arranged in the shunt device (2), and the first outer mold (5) is sleeved with a first outer mold (5) for pressing and holding the first outer mold (5). The first pressing plate (6) of the outer mould (5), the first pressing plate (6) is fixedly connected to the outer mould of the diverting device (2) by connecting screws, and the diverting device (2) is far away from the inlet The outer surface of one end of the mold is annularly equidistantly provided with a plurality of first threaded holes, and first adjustment bolts (11) are engaged in each of the first threaded holes, and the first core mold (3) is far away from the shunt device. A second core mold (7) is installed at one end of (2), and a second middle mold (9) matched with the first middle mold (4) is sleeved on the second core mold (7). The second middle mold (9) is sleeved with a second outer mold (10) for pressing and holding the second middle mold (9), and the second outer mold (10) is arranged in the first pressing plate (6), The second outer mold (10) is sleeved with a second pressing plate (8) for holding the position of the second outer mold (10), and the second pressing plate (8) is connected to the first pressing plate (8) by connecting screws. The pressing plate (6) is fixedly connected, and the outer surface of one end of the first pressing plate (6) away from the shunt device (2) is provided with a plurality of second threaded holes in an annular and equidistant manner, and a plurality of the second threaded holes A second adjusting bolt (12) is engaged with each other.
A double-layer hollow tube mold according to claim 1, characterized in that: the distribution device (2) comprises a distribution mold, the distribution mold is fixedly connected with the inlet mold (1) by screws, and the distribution mold The side facing away from the inlet mold (1) is fixedly connected to the outer splitting mold, the splitting outer mold is provided with a splitting middle mold, and the splitting middle mold is provided with a splitting core mold.
A double-layer hollow tube mold according to claim 2, characterized in that: the side of the split core mold facing the first core mold (3) is machined with a third threaded hole, and the first core mold (3) ) on the side facing the split core mold is fixed with a threaded post matched with the third threaded hole, and the threaded post is engaged in the third threaded hole.
A double-layer hollow tube mold according to claim 2, characterized in that: the side of the split core mold facing the first core mold (3) is machined with a third threaded hole, and the first core mold (3) ) The side facing the split core mold is provided with a first through hole matching the third threaded hole, and the side of the second core mold (7) facing the first core mold (3) is provided with a first through hole matching with the first through hole The second through hole is provided with a connecting screw in the second through hole, and the connecting screw passes through the first through hole and engages in the third threaded hole.