阅读说明：本技术 一种真空定径套连接机构 (Vacuum sizing sleeve connecting mechanism ) 是由 王灿 于 2019-12-10 设计创作，主要内容包括：本发明涉及管材加工技术领域,且公开了一种真空定径套连接机构,包括口模和定径套,所述定径套的内腔中空区域设有定径腔,所述定径腔的端口内壁开设有连接面,所述连接面的截面为由定径套的端口向定径套的内部逐渐变小,且所述连接面的端口与定径腔的内壁以圆弧平滑连接,所述口模与定径套的端部均设有法兰盘,所述口模与定径套通过法兰盘进行法兰连接。本发明通过在定径套的端口内径开设连接面,连接面的变截面特点,可使得口模处挤出的管材在还处于高温软化状态时顺利进入定径套内,不会受到结合处边缘的划伤,由此,可通过在口模和定径套的结合端设法兰盘,以法兰盘进行法兰连接,可降低定径套的端口制造工艺要求。(The invention relates to the technical field of pipe processing, and discloses a vacuum sizing sleeve connecting mechanism which comprises a neck mold and a sizing sleeve, wherein a sizing cavity is arranged in a hollow region of an inner cavity of the sizing sleeve, a connecting surface is arranged on the inner wall of a port of the sizing cavity, the section of the connecting surface is gradually reduced from the port of the sizing sleeve to the inside of the sizing sleeve, the port of the connecting surface is smoothly connected with the inner wall of the sizing cavity in an arc shape, flange plates are arranged at the end parts of the neck mold and the sizing sleeve, and the neck mold and the sizing sleeve are in flange connection through the flange plates. The invention can lead the pipe extruded from the mouth mold to smoothly enter the sizing sleeve when the pipe is still in a high-temperature softening state by arranging the connecting surface at the inner diameter of the port of the sizing sleeve and the variable cross section characteristic of the connecting surface, and can not be scratched by the edge of the joint, thereby reducing the requirements of the port manufacturing process of the sizing sleeve by trying a flange plate at the joint end of the mouth mold and the sizing sleeve and carrying out flange connection by the flange plate.)

1. The utility model provides a vacuum sizing cover coupling mechanism, includes bush (1) and sizing cover (2), its characterized in that: the inner chamber cavity region of sizing cover (2) is equipped with sizing chamber (4), the port inner wall in sizing chamber (4) has been seted up and has been connected face (7), the cross-section of being connected face (7) diminishes to the inside of sizing cover (2) gradually for the port by sizing cover (2), just the inner wall of being connected the port of face (7) and sizing chamber (4) is with circular arc smooth connection, bush (1) all is equipped with ring flange (6) with the tip of sizing cover (2), bush (1) and sizing cover (2) carry out flange joint through ring flange (6).

2. A vacuum sizing sleeve connection according to claim 1 wherein: the port of the die (1) is provided with a receiving raised head (8), the receiving raised head (8) is arranged in an up-down symmetrical mode, the curvatures of the inner wall of the receiving raised head (8) and the inner wall of the die (1) are completely the same, one end of the connecting surface (7) is provided with a clamping groove (9), and the clamping groove (9) and the receiving raised head (8) are arranged in a matching mode.

3. A vacuum sizing sleeve connection according to claim 2 wherein: the receiving raised head (8) is a quarter of a circle arc of the circumference, and the arc is symmetrically arranged by a vertical line.

4. A vacuum sizing sleeve connection according to claim 2 wherein: the length of the clamping groove (9) accounts for two thirds of the horizontal projection length of the connecting surface (7).

Technical Field

The invention relates to the technical field of pipe processing, in particular to a connecting mechanism of a vacuum sizing sleeve.

Background

In the forming process of the plastic pipe, the material is plasticized in an extruder, extruded into a pipe shape through an annular gap between a machine head core rod and a die, and then enters a forming device for cooling and forming. The sizing device, namely the vacuum sizing sleeve, is a common method for sizing polyethylene plastic pipes, and the principle of the sizing device is that the outer surface of the pipe is adsorbed on the inner wall of the sizing sleeve by utilizing the pressure difference generated between the inner cavity and the wall surface of the pipe, and the pipe with the outer diameter matched with the size of the inner wall of the sizing sleeve is obtained after cooling.

In the manufacturing process of the sizing sleeve, the diameter of the inner hole of the sizing sleeve is consistent with or slightly larger than the inner diameter of the neck ring mold, the plane joint of the inner hole needs to be in smooth transition after the two parts are assembled and combined, otherwise, the high-temperature plastic pipe extruded from the outlet of the neck ring mold is easy to generate rough outer surface of the pipe due to non-smooth transition, and the sizing processing fails. Among the prior art, bush and sizing cover threaded connection for joint smooth transition under the condition of guaranteeing that the internal surface bore is the same and with the axle center, but, because the control degree of difficulty of screw manufacturing precision is great, and during screw assembly, the error when screw thread mouth block easily can make sizing cover and bush joint produce the dislocation, and seriously influence the processingquality of tubular product, consequently propose a coupling mechanism of sizing cover, aim at solving above-mentioned problem.

Disclosure of Invention

Aiming at the defects of the joint of the existing vacuum sizing sleeve and the neck ring mold in the background technology, the invention provides the connecting mechanism of the vacuum sizing sleeve, which has the advantages of low precision processing requirement of a connecting piece and convenience in connection and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a vacuum sizing cover coupling mechanism, includes bush and sizing cover, the inner chamber cavity region of sizing cover is equipped with the sizing chamber, the port inner wall in sizing chamber has been seted up and has been connected the face, the cross-section of connecting the face diminishes to the inside of sizing cover gradually for the port by the sizing cover, just the port of connecting the face and the inner wall in sizing chamber are with circular arc smooth connection, the bush all is equipped with the ring flange with the tip of sizing cover, the bush carries out flange joint through the ring flange with the sizing cover.

Preferably, the port of the die is provided with the receiving raised heads which are arranged in an up-down symmetrical manner, the curvatures of the inner walls of the receiving raised heads and the inner walls of the die are completely the same, one end of the connecting surface is provided with the clamping groove, and the clamping groove and the receiving raised heads are arranged in a matching manner.

Preferably, the receiving raised head is a quarter of a circle, and the circle is symmetrically arranged along a vertical line.

Preferably, the length of the clamping groove accounts for two thirds of the horizontal projection length of the connecting surface.

The invention has the following beneficial effects:

1. the invention can lead the pipe extruded from the mouth mold to smoothly enter the sizing sleeve when the pipe is still in a high-temperature softening state by arranging the connecting surface at the inner diameter of the port of the sizing sleeve and the variable cross section characteristic of the connecting surface, and can not be scratched by the edge of the joint, thereby reducing the requirements of the port manufacturing process of the sizing sleeve by trying a flange plate at the joint end of the mouth mold and the sizing sleeve and carrying out flange connection by the flange plate.

2. The port of the die is provided with the bearing raised head, the corresponding position of the connecting surface is provided with the clamping groove, the bearing raised head is matched with the clamping groove, the clamping limit of the bearing raised head and the clamping groove is used for determining the flange connecting and fixing position of the die and the sizing sleeve so as to be convenient to install, meanwhile, the clamping position of the bearing raised head and the clamping groove is determined by the outer diameter of the bearing raised head and the clamping groove, and the size of the outer diameter is controlled to be irrelevant to the inner diameter of the sizing sleeve, so that the clamping precision requirement of the bearing raised head and the clamping groove can be reduced, and on the other hand, the extending bearing raised head can provide support performance for extruded pipes in a molten state so as to prevent the lower part of the.

3. According to the invention, the connecting surface is arranged, so that the burr scraps polished in the sizing sleeve are accommodated at the notch of the connecting surface, the phenomenon that the scraps remained in the sizing sleeve are scraped and then enter the surface of the pipe is effectively prevented, and the scraps at the connecting surface can be cleaned regularly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a split type structure of the die and the sizing sleeve of FIG. 1 according to the present invention;

FIG. 3 is a side view of the die structure of the present invention.

In the figure: 1. a neck ring mold; 2. sizing sleeve; 3. an extrusion die channel; 4. a sizing cavity; 5. a vacuum chamber; 6. a flange plate; 7. a connecting surface; 8. receiving the raised head; 9. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a vacuum sizing sleeve connecting mechanism comprises a neck mold 1 and a sizing sleeve 2, wherein an extrusion mold channel 3 is arranged inside the neck mold 1, the extrusion mold channel 3 is used for extruding molten particles into a pipe and discharging the pipe, a sizing cavity 4 is arranged in a hollow area of an inner cavity of the sizing sleeve 2, the sizing cavity 4 is used for unifying the outer diameter of the pipe discharged from the extrusion mold channel 3 and polishing the smoothness of the surface of the pipe, a vacuum cavity 5 is arranged inside the sizing sleeve 2 and outside the sizing cavity 4, wherein a groove is arranged on the inner wall of the vacuum cavity 5 in the direction of the sizing cavity 4, the vacuum cavity 5 is used for vacuumizing, the pipe in the sizing cavity 4 is tightly attached to the inner wall of the sizing cavity 4 in a negative pressure mode, so that the sizing of the pipe is realized, a connecting surface 7 is arranged on the inner wall of a port of the sizing cavity 4, and the section of the connecting surface 7 gradually decreases from the port, and the end of the connecting surface 7 is smoothly connected with the inner wall of the sizing cavity 4 in an arc shape, the end parts of the neck ring mold 1 and the sizing sleeve 2 are respectively provided with a flange plate 6, and the neck ring mold 1 and the sizing sleeve 2 are in flange connection through the flange plates 6.

From this, the connection combination department of bush 1 and sizing cover 2, tubular product extruded by bush 1 is when getting into sizing cover 2, earlier get into sizing chamber 4 again after connecting 7 guides through being connected, accomplish the sizing operation by the inner wall in sizing chamber 4, when tubular product is connected face 7, because the opening diameter of being connected face 7 is greater than the export internal diameter of bush 1, tubular product can not receive any surface scratch risk, and connect 7 arc smooth connection to sizing chamber 4 of face, can ensure again that tubular product can get into in sizing cover 2, thereby, to bush 1 and sizing cover 2 join up greatly reduced on the required precision, accessible ring flange 6 carry out flange joint can. Simultaneously, the setting of connecting face 7 can make the connection combination department of bush 1 and sizing cover 2 have a groove space, can hold the burr piece that the tubular product surface was scraped, can effectively prevent the scratch of the piece of scraping earlier to going into tubular product surface afterwards.

Wherein, for making flange joint's interface stable, convenient, establish at the port of bush 1 and accept plush copper 8, accept plush copper 8 and be the longitudinal symmetry and arrange, the inner wall of accepting plush copper 8 is the same with bush 1's inner wall camber completely, simultaneously, connect the one end of face 7 and establish joint groove 9, joint groove 9 with accept plush copper 8 suitability and arrange, utilize the suitability joint of accepting plush copper 8 and joint groove 9, can stabilize bush 1 and the relative position of sizing cover 2 flange joint, simultaneously, accept the stretching out of plush copper 8, can effectively bear the weight of the tubular product that bush 1 extrudes, prevent the deformation of tubular product below.

The adapting raised head 8 is a quarter of a circular arc of the circumference, and the circular arcs are symmetrically arranged in a vertical line, and the arrangement mode can enable the adapting raised head 8 to bear the weakest position of a high-temperature molten pipe, so that the lower part of the pipe is effectively prevented from being deformed under pressure.

Wherein, the length of joint groove 9 accounts for and connects two-thirds of face 7 horizontal projection, and on the one hand, the guarantee is accepted protruding head 8 and is stretched into the length of being connected face 7 and can bear tubular product for the length that the face 7 was connected in the unsettled strideing across of tubular product tip shortens, and on the other hand reserves the accommodation space of connecting face 7, in order to accomodate a certain amount of piece.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.