阅读说明：本技术 多管挤出机的同步挤出系统及方法 (Synchronous extrusion system and method of multi-pipe extruder ) 是由 周和平 汪家伟 康树峰 张增果 郑芬 于 2020-07-01 设计创作，主要内容包括：本发明公开一种多管挤出机的同步挤出系统,包括机头、检测模块、控制模块与执行模块；机头具有同时挤出至少两根管材的至少两个口模；检测模块检测经过机头挤出的每根管材的松紧状态,并将检测到的松紧状态信息传递给控制模块；控制模块在检测模块检测到管材处于松弛状态时,发出控制信号给执行模块；每个执行模块对应机头内的一个流道,执行模块根据控制信号降低该管材对应机头内流道的温度。本发明还公开一种多管挤出机的同步挤出方法。本发明通过分别检测每根管材挤出后的松紧状态,在检测到挤出管材处于松弛状态时,降低该管材对应机头内流道的温度,来调整该管材挤出后的松紧度,保证同步挤出的管材质量一致。(The invention discloses a synchronous extrusion system of a multi-pipe extruder, which comprises a machine head, a detection module, a control module and an execution module, wherein the detection module is used for detecting the extrusion speed of a multi-pipe extruder; the machine head is provided with at least two mouth molds for simultaneously extruding at least two pipes; the detection module detects the tightness state of each pipe extruded by the machine head and transmits the detected tightness state information to the control module; the control module sends a control signal to the execution module when the detection module detects that the pipe is in a loose state; each execution module corresponds to one flow channel in the machine head, and the execution modules reduce the temperature of the flow channel in the machine head corresponding to the pipe according to the control signals. The invention also discloses a synchronous extrusion method of the multi-pipe extruder. According to the invention, the tightness state of each extruded pipe is respectively detected, and when the extruded pipe is detected to be in a loose state, the temperature of the flow channel in the machine head corresponding to the pipe is reduced, so that the tightness of the extruded pipe is adjusted, and the quality consistency of the synchronously extruded pipes is ensured.)

1. A synchronous extrusion system of a multi-pipe extruder is characterized by comprising a machine head, a detection module, a control module and an execution module; the machine head is provided with at least two mouth molds for simultaneously extruding at least two pipes; the detection module detects the tightness state of each pipe extruded by the machine head and transmits the detected tightness state information to the control module; the control module sends a control signal to the execution module when the detection module detects that the pipe is in a loose state; each execution module corresponds to one flow channel in the machine head, and the execution modules reduce the temperature of the flow channel in the machine head corresponding to the pipe according to the control signals.

2. The synchronous extrusion system of a multi-tube extruder according to claim 1, wherein the detection module comprises an offset sensor for detecting the sag offset of the tubes, and one offset sensor is correspondingly arranged at the extrusion outlet of each tube.

3. The synchronous extrusion system of a multi-tube extruder as claimed in claim 1, wherein the execution module comprises a heater for heating corresponding to each flow passage in the head, respectively, and a temperature controller connected to the heater for adjusting a heating temperature of the heater according to a control signal outputted from the control module.

4. The synchronous extrusion system of a multi-tube extruder as claimed in claim 3, wherein the heater is in a semi-annular plate structure, and a temperature sensor is arranged on the heater and connected with the temperature controller.

5. The synchronous extrusion system of a multi-tube extruder as claimed in claim 3, wherein the heater is a rod-shaped structure, and a temperature sensor is arranged on one side of the machine head close to the neck mold or on the neck mold, and the temperature sensor is connected with the temperature controller.

6. The synchronous extrusion system of a multi-tube extruder as recited in claim 1, wherein each execution module corresponds to a die, and the execution module further reduces the temperature of the corresponding die of the tube according to the control signal.

7. The synchronous extrusion system of a multi-tube extruder according to claim 6, wherein the execution module further comprises a cooling jacket, a pipeline communicated with the cooling jacket, and a flow controller arranged on the pipeline, the cooling jacket is arranged on one side of the die away from the head, and the flow controller is used for receiving the control signal output by the control module to control the pipeline to supply cooling liquid or blow cold air to the cooling jacket.

8. The synchronous extrusion system of a multi-tube extruder as claimed in claim 7, wherein the cooling jacket is embedded in the side of the die away from the head, the cooling jacket is fixed on the die through a gland, the pipe is fixedly connected with the gland through a cooling pipe joint, and the cooling jacket is made of porous material.

9. The synchronous extrusion system of a multi-tube extruder as claimed in claim 8, wherein an annular cavity surrounding the discharge port is formed in the cooling jacket, and the annular cavity has an inlet and an outlet; the pipeline comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is communicated with the inlet of the annular cavity, the liquid outlet pipe is communicated with the outlet of the annular cavity, and the flow controller is arranged on the liquid inlet pipe.

10. The synchronous extrusion system of a multi-tube extruder according to claim 1, wherein the detection module comprises a tension pulley arranged along the extrusion direction of each tube, and a tension sensor for detecting the tension of the tube is arranged on the tension pulley.

11. A synchronous extrusion method of a multi-pipe extruder is applied to an extrusion system for simultaneously extruding at least two pipes, and is characterized by comprising the following steps:

the detection module detects the tightness state of each pipe extruded by the machine head and transmits the detected tightness state information to the control module;

the control module sends a control signal to the execution module when the detection module detects that the pipe is in a loose state;

and the execution module reduces the temperature of the flow channel in the machine head corresponding to the pipe according to the control signal.

12. The synchronous extrusion method of a multi-tube extruder as claimed in claim 11, wherein the step of detecting the tightness state of each tube extruded through the head by the detection module comprises: detecting the droop offset of the pipe through an offset sensor; when the offset sensor detects that the pipe is sagged, the pipe is judged to be in a loose state, and otherwise, the pipe is in a tensioning state.

13. The synchronous extrusion method of a multi-tube extruder as claimed in claim 11, wherein the step of the execution module lowering the temperature of the corresponding flow channel in the head of the tube according to the control signal comprises:

a heater is arranged outside each flow channel in the machine head, and the temperature of the flow channel is reduced by reducing the heating temperature of the heater of the flow channel corresponding to the pipe.

14. The simultaneous extrusion method of a multi-tube extruder as claimed in claim 13, further comprising the steps of: and the execution module reduces the temperature of the mouth mold corresponding to the pipe according to the control signal.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of extrusion molding equipment, in particular to a synchronous extrusion system and method of a multi-pipe extruder.

[ background of the invention ]

At present, double-pipe extrusion equipment adopts a mode of one die and double extrusion to simultaneously extrude two polymer pipes through one set of machine head, so that the production efficiency can be improved, and the production cost can be saved. As shown in fig. 1, the raw material is melted in the barrel of the extruder 100, extruded through the head, cooled by the water tank 200, sequentially passed through the traction wheel set 300 and the wire storage frame 400, and finally wound by the upper disc machine 500, so as to conveniently enter the next process.

In actual production, due to the fact that the temperature of the extrusion outlet is suddenly changed, the pipe contracts, and the contraction quantity of the pipe can be adjusted by adjusting parameters such as the traction speed, the extrusion speed and the extrusion temperature of extrusion, so that products with required specifications can be produced. However, since the double-pipe extrusion equipment shares the same set of extrusion production system, the tightness of one pipe cannot be effectively controlled, and in the process of extruding the upper plate of the pipe, when the shrinkage is inconsistent between the two pipes, the two pipes extruded simultaneously are occasionally asynchronous, one pipe is loose, the other pipe is tensioned, so that the subsequent processing or the quality of finished products of the pipes is inconsistent, deviation exists in the production process, and dead halt can be caused after the deviation is accumulated.

In view of the above, it is desirable to provide a system and a method for simultaneous extrusion of multiple extruders to overcome the above-mentioned drawbacks.

[ summary of the invention ]

The invention aims to provide a synchronous extrusion system and a synchronous extrusion method of a multi-pipe extruder, which are used for controlling the tightness of extruded pipes and ensuring the quality consistency.

In order to achieve the aim, the invention provides a synchronous extrusion system of a multi-pipe extruder, which comprises a machine head, a detection module, a control module and an execution module; the machine head is provided with at least two mouth molds for simultaneously extruding at least two pipes; the detection module detects the tightness state of each pipe extruded by the machine head and transmits the detected tightness state information to the control module; the control module sends a control signal to the execution module when the detection module detects that the pipe is in a loose state; each execution module corresponds to one flow channel in the machine head, and the execution modules reduce the temperature of the flow channel in the machine head corresponding to the pipe according to the control signals.

In a preferred embodiment, the detection module comprises an offset sensor for detecting the sag offset of the pipes, and one offset sensor is correspondingly arranged at the extrusion outlet of each pipe.

In a preferred embodiment, the execution module comprises a heater for heating corresponding to each flow channel in the handpiece, and a temperature controller connected with the heater, wherein the temperature controller is used for adjusting the heating temperature of the heater according to the control signal output by the control module.

In a preferred embodiment, the heater is in a semi-annular plate-shaped structure, and a temperature sensor is arranged on the heater and connected with the temperature controller.

In a preferred embodiment, the heater is a rod-shaped structure, and a temperature sensor is arranged on one side of the machine head close to the neck mold or on the neck mold and is connected with the temperature controller.

In a preferred embodiment, each execution module corresponds to one die, and the execution module further reduces the temperature of the die corresponding to the pipe according to the control signal.

In a preferred embodiment, the execution module further includes a cooling jacket, a pipeline communicated with the cooling jacket, and a flow controller disposed on the pipeline, the cooling jacket is disposed on a side of the die away from the die head, and the flow controller is configured to receive a control signal output by the control module and control the pipeline to supply cooling liquid or blow cold air to the cooling jacket.

In a preferred embodiment, the cooling jacket is embedded in one side of the neck mold far away from the machine head, the cooling jacket is fixed on the neck mold through a gland, the pipeline is fixedly connected with the gland through a cooling pipe joint, and the cooling jacket is made of porous materials.

In a preferred embodiment, an annular cavity surrounding the discharge hole is formed in the cooling sleeve, and the annular cavity is provided with an inlet and an outlet; the pipeline comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is communicated with the inlet of the annular cavity, the liquid outlet pipe is communicated with the outlet of the annular cavity, and the flow controller is arranged on the liquid inlet pipe.

In a preferred embodiment, the detection module comprises a tension pulley arranged along the extrusion direction of each pipe, and a tension sensor for detecting the tension of the pipe is arranged on the tension pulley.

In order to achieve the above object, the present invention provides a synchronous extrusion method of a multi-tube extruder, which is applied to an extrusion system for simultaneously extruding at least two tubes, and comprises the following steps:

the detection module detects the tightness state of each pipe extruded by the machine head and transmits the detected tightness state information to the control module;

the control module sends a control signal to the execution module when the detection module detects that the pipe is in a loose state;

and the execution module reduces the temperature of the flow channel in the machine head corresponding to the pipe according to the control signal.

In a preferred embodiment, the step of detecting the tightness of each tube extruded through the head by the detection module comprises: detecting the droop offset of the pipe through an offset sensor; when the offset sensor detects that the pipe is sagged, the pipe is judged to be in a loose state, and otherwise, the pipe is in a tensioning state.

In a preferred embodiment, the step of lowering the temperature of the flow channel in the machine head corresponding to the tube by the execution module according to the control signal comprises:

a heater is arranged outside each flow channel in the machine head, and the temperature of the flow channel is reduced by reducing the heating temperature of the heater of the flow channel corresponding to the pipe.

In a preferred embodiment, the simultaneous extrusion method further comprises the steps of: and the execution module reduces the temperature of the mouth mold corresponding to the pipe according to the control signal.

The invention has the beneficial effects that: the tightness of each extruded pipe is detected, and when the pipe is in a loose state, the tightness of the extruded pipe is adjusted by reducing the temperature of the pipe corresponding to the flow channel in the machine head, so that the quality of the synchronously extruded pipe is ensured to be consistent.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a dual tube extrusion line of the prior art;

FIG. 2 is a block diagram showing the structure of a multi-tube extruder simultaneous extrusion system according to a preferred embodiment of the present invention;

FIG. 3 is a perspective view of a simultaneous extrusion system of a multi-tube extruder according to an embodiment of the present invention;

FIG. 4 is a partially exploded block diagram of the synchronous extrusion system shown in FIG. 3;

FIG. 5 is a perspective view of a simultaneous extrusion system of a multi-tube extruder according to an embodiment of the present invention;

FIG. 6 is a partially exploded block diagram of the synchronous extrusion system shown in FIG. 5;

FIG. 7 is a perspective view of a simultaneous extrusion system of a multi-tube extruder according to an embodiment of the present invention;

FIG. 8 is a partially exploded block diagram of the synchronous extrusion system shown in FIG. 7;

FIG. 9 is a perspective view of the cooling jacket shown in FIG. 8;

FIG. 10 is a cross-sectional view of the cooling jacket shown in FIG. 8.

The reference numbers illustrate: the device comprises an extruder 100, a water tank 200, a traction wheel set 300, a wire storage frame 400, an upper disc machine 500, a machine head 10, a mouth die 11, a detection module 20, an offset sensor 21, a control module 30, an execution module 40, a heater 41, a temperature sensor 42, a cooling jacket 43, an annular cavity 431, an inlet 4311, an outlet 4312, a pipeline 44, a liquid inlet pipe 442, a liquid outlet pipe 443, a cooling pipe joint 441, a flow controller 45, a gland 46 and a pipe 50.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 2 to 4, an embodiment of the present invention provides a synchronous extrusion system of a multi-tube extruder, including a machine head 10, a detection module 20, a control module 30 and an execution module 40; a head 10 having at least two dies 11 for simultaneously extruding at least two tubes 50; the detection module 20 detects the tightness state of each pipe 50 extruded by the machine head 10 and transmits the detected tightness state information to the control module 30; when the detection module 20 detects that the pipe 50 is in a loose state, the control module 30 sends a control signal to the execution module 40; each execution module 40 corresponds to a flow channel in the handpiece 10, and the execution module 40 reduces the temperature of the tube 50 corresponding to the flow channel in the handpiece 10 according to the control signal.

In this embodiment, the detecting module 20 includes an offset sensor 21 for detecting a droop offset of the pipes 50, and an offset sensor 21 is correspondingly disposed at an extrusion outlet of each pipe 50. In other embodiments, the detecting module 20 includes a tension wheel disposed along the extrusion direction of each tube 50, the tension wheel is provided with a tension sensor for detecting the tension of the tube 50, and the tightness of the tube is detected by detecting the tension of the tube 50 passing through the tension wheel.

In this embodiment, the control module 30 is a PLC or a single chip controller, and can receive the feedback signal of the detection module 20 to perform operation processing and output a control signal, so as to issue an execution instruction to the execution module 40.

As shown in fig. 2 and 3, the execution module 40 includes a heater 41 for heating each flow channel in the head 10, and a temperature controller connected to the heater 41, wherein the temperature controller is configured to adjust a heating temperature of the heater 41 according to a control signal output by the control module 30, and control a shrinkage rate of the tube 50 during extrusion within a certain range, so as to maintain consistency of the product. In this embodiment, the number of the dies 11 is two, the head 10 is cylindrical, the heater 41 has a semi-annular plate-shaped structure, and the heater 41 is provided with a resistance heating wire therein. Two heaters 41 are arranged around the periphery of the handpiece 10, and a temperature sensor 42 is arranged on the heaters 41, and the temperature sensor 42 is connected with a temperature controller.

In other embodiments, when the number of the dies 11 is three or more, the heaters 41 are rod-shaped, at least two rod-shaped heaters may be disposed around each flow channel in the machine head 10, and specifically, a temperature sensor 42 is disposed on one side of the machine head 10 close to the dies 11 or on the dies 11, and the temperature sensor 42 is connected to a temperature controller.

Further, referring to fig. 5 to 8, each execution module 40 corresponds to one die 11, and the execution module 40 further reduces the temperature of the tube 50 corresponding to the die 11 according to the control signal. The execution module 40 further includes a cooling jacket 43, a duct 44 communicating with the cooling jacket 43, and a flow controller 45 disposed on the duct 44, wherein the cooling jacket 43 is disposed on a side of the die 11 away from the machine head 10, and the flow controller 45 is configured to receive a control signal output by the control module 30 and control the duct 44 to supply cooling liquid or blow cold air to the cooling jacket 43.

In one embodiment, as shown in fig. 5 and 6, the cooling jacket 43 is embedded in the side of the die 11 away from the head 10, the cooling jacket 43 is fixed on the die 11 by a gland 46, the pipe 44 is fixedly connected with the gland 46 by a cooling pipe joint 441, and the cooling jacket 43 is made of porous material and can absorb the cooling liquid. The flow controller 45 is configured to receive a control signal output by the control module 30, control the pipeline 44 to supply cooling liquid to the cooling jacket 43, in this embodiment, the cooling liquid may be cooling water, and is low in cost, and the cooling liquid is heated and evaporated to reduce the temperature of the die 11, so as to reduce the fluidity of the extruded pipe 50, control the shrinkage rate of the extruded pipe, and maintain the extruded pipe 50 in a proper tightness state. Specifically, the die 11 is formed with a groove-like structure for accommodating the cooling jacket 43, and the cooling jacket 43 is made of a high-temperature resistant sponge. In other embodiments, the cooling fluid may also be a cryogenic oil.

In one embodiment, as shown in fig. 7-10, an annular cavity 431 is formed within the cooling jacket 43 surrounding the outlet port, the annular cavity 431 having an inlet 4311 and an outlet 4312. The duct 44 comprises an inlet duct 442 and an outlet duct 443, the inlet duct 442 communicating with the inlet 4311 of the annular chamber 431, the outlet duct 443 communicating with the outlet 4312 of said annular chamber 431, and the flow controller 45 being provided on the inlet duct 442. In this embodiment, the cooling jacket 43 is fixed on the die 11 by screws, the bottom end of the annular cavity 431 is provided with an inlet 4311, and the top end of the annular cavity 431 is provided with an outlet 4312, that is, the cooling liquid enters from the bottom end of the annular cavity 431 and flows out from the top end, so as to form a cooling liquid circulation loop.

The embodiment of the invention also provides a synchronous extrusion method of the multi-pipe extruder, which is applied to an extrusion system for extruding at least two pipes 50 simultaneously, and the synchronous extrusion method specifically comprises the following steps:

in step S1, the detection module 20 detects the tightness of each tube 50 extruded by the handpiece 10, and transmits the information of the detected tightness to the control module 30.

In step S2, when the detection module 20 detects that the tube 50 is in the slack state, the control module 30 sends a control signal to the execution module 40.

In step S3, the execution module 40 reduces the temperature of the tube 50 corresponding to the flow channel in the handpiece 10 according to the control signal.

In this embodiment, step S1 includes: detecting the droop deviation of the pipe 50 through a deviation sensor 21; when the offset sensor 21 detects that the pipe 50 sags, the pipe 50 is judged to be in a loose state, otherwise, the pipe is in a tight state.

In step S3, the step of the executing module 40 lowering the temperature of the tube 50 corresponding to the flow channel in the handpiece 10 according to the control signal includes: a heater 41 is respectively arranged outside each flow passage in the machine head 10, and the temperature of the flow passage is reduced by reducing the heating temperature of the heater 41 of the flow passage corresponding to the pipe 50.

In step S3, the synchronous extrusion method further includes the steps of: the execution module 40 reduces the temperature of the tube 50 corresponding to the die 11 according to the control signal.

According to the synchronous extrusion system and method of the multi-pipe extruder provided by the embodiment of the invention, the tightness of each extruded pipe 50 is detected, and when the pipe 50 is in a loose state, the tightness of the extruded pipe 50 is adjusted by reducing the temperature of the pipe 50 corresponding to the flow channel in the machine head 10, so that the quality consistency of the synchronously extruded pipes 50 is ensured.

The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.