CN103568178A - Flat film die head with automatic lip adjustment device and adjustment method of die lip - Google Patents

Abstract

A flat film die head with an automatic die lip adjusting device comprises a die head body, die lips arranged on the die head body, a guide block, a plurality of fine adjustment screws, a thickness gauge and a control device, wherein the fine adjustment screws are sequentially numbered; the die head comprises a die head body, a left-right moving mechanism, a dragging plate, a wrench, a feeding beam, a cylinder, a coupling and a rotary driving device, wherein the left-right moving mechanism is arranged on the die head body and drives the dragging plate; the wrench is pivoted with the feeding beam, the cylinder is fixed on the carriage, and a piston rod head of the cylinder is fixedly connected with the feeding beam; the coupling is fixedly connected with the rotary driving device and matched with the wrench; the coupling is in sliding fit with the wrench in the axial direction, and the coupling and the wrench rotate synchronously; the lower end of the wrench is embedded with or separated from the head of the screw; the control device is connected with the left-right moving mechanism, the rotary driving device and the air cylinder. By adopting the structure, the thickness gauge continuously detects the thickness of the flat membrane, and when the thickness is abnormal, the purpose of adjusting the thickness of the flat membrane is achieved.

Description

Flat film die head with automatic lip adjustment device and adjustment method of die lip

technical field

The invention relates to a flat film die head, in particular to a die lip adjusting device of a flat film die head.

Background technique

Flat film (casting) products are a variety of plastic products that have developed very rapidly in recent years. The characteristics of its production process are: the die head is relatively wide, and the melt must be evenly distributed. In the width direction of the entire die head, the melt leaves the die lip with uniform opening at the same speed, which is an important condition to ensure uniform thickness and smooth surface of the product. The opening of the die lip needs to be adjusted during production. First, the gap between the die lip opening needs to be adjusted due to the conversion of the product specifications. Second, during production, the actual die lip opening gap may If it is greater than the expected value or the final adjustment value, adjustment is required. There are two ways to adjust the opening gap (also known as opening) of the existing die lip:

One is to manually adjust the fine-tuning bolt to advance and retreat to adjust the opening of the die lip. The operator observes the change of the thickness of the product on the display screen of the thickness gauge, and uses a wrench to turn the corresponding fine-tuning bolt to adjust the opening of the die lip, so that the gap between the die lip opening reaches the preset value, and controls the thickness error of the product to realize the product thickness. Thickness and its uniformity.

The other is to use heat-sensitive materials to process the fine-tuning bolts, and adjust the length of the fine-tuning bolts by electric heating to adjust the opening of the die lip. When the production unit is operating normally and the temperature and pressure are stable, observe the change of product thickness on the display screen of the thickness gauge, adjust the electric heating temperature of the corresponding micro-adjustment screw of the die head to adjust the length of the micro-adjustment bolt to push against the die lip, so that the die The lip opening gap reaches the preset value, so that the opening of the entire width of the die lip is uniform.

Contents of the invention

The object of the present invention is to provide a flat film die head with an automatic adjustment device for the die lip, which can realize automatic adjustment and has high precision.

The present invention is achieved in the following way: a flat film die head with automatic lip adjustment device, comprising a die body, a die lip arranged on the die body, a guide block, several fine-tuning screws numbered in sequence, and a thickness gauge and control device; the fine-tuning screw passes through the bolt hole on the die body and the threaded hole of the guide block, and its end is against the die lip; the control device is connected with the thickness gauge, and its special feature is that it also includes left and right Moving mechanisms, slides, wrenches, feed beams, cylinders, couplings and rotary drives,

The left and right moving mechanism is arranged on the die head body, and the left and right moving mechanism drives the carriage; the wrench is pivotally connected with the feed beam, the cylinder is fixed on the carriage, and the piston rod head of the cylinder is fixedly connected with the feed beam;

The coupling is fixedly connected with the rotary driving device and cooperates with the wrench; the coupling and the wrench slide and fit in the axial direction, and the coupling and the wrench rotate synchronously;

The lower end of the wrench is fitted with or separated from the head of the screw; the control device is connected with the left and right moving mechanism, the rotary drive device and the cylinder.

The flat film die head with automatic lip adjustment device is special in that: the left and right moving mechanism includes a guide rod, a screw shaft, a nut, a first servo motor, a first reducer and a frame plate,

The frame plate is arranged at both ends of the die body, the two ends of the guide rod are fixedly connected with the frame plate; the two ends of the screw shaft are pivotally connected with the frame plate; the nut is fixed on the carriage, and the screw shaft cooperates with the nut.

The carriage is slidably connected with the guide rod.

The first reducer is fixed on the frame plate, and the output shaft of the first reducer is fixedly connected with the screw shaft; the reducer is driven by the first servo motor.

The special feature of the flat film die head with automatic lip adjustment device is that the rotating mechanism includes a second servo motor and a second reducer,

The second reducer is fixed on the carriage, and the output shaft of the second reducer is fixedly connected with the coupling; the second servo motor drives the reducer.

A method for adjusting the lip of a flat film die head, which comprises the following steps:

(1) The thickness gauge detects the thickness of the flat film immediately, and transmits the detected signal to the control device;

(2) The control device performs arithmetic processing on the detection signal. When the detected thickness data exceeds the standard, the screw with the corresponding number is determined, and the control device notifies the left and right moving mechanism to move;

(3) When the left and right moving mechanism moves to the screw position determined in step (2), stop moving;

(4) The cylinder moves, and the wrench fits with the head of the screw;

(5) The rotary drive mechanism drives the wrench to rotate;

(6) The rotary drive mechanism stops rotating, the cylinder is reset, and the wrench is separated from the head of the screw;

(7) The left and right moving mechanism moves to the initial position and resets.

The present invention is a kind of flat film die head with die lip automatic adjustment device. Due to the adoption of such a structure, the thickness gauge continuously detects the thickness of the flat film. When the thickness is abnormal, the thickness gauge transmits the signal to the control device to control The device calculates, determines and outputs the number of the fine-tuning screw corresponding to the abnormal part of the thickness, and then the left and right moving mechanism moves to the corresponding number of the fine-tuning screw and stops moving; the cylinder moves, the wrench and the screw are fitted; the rotary drive device drives the wrench to adjust The screw rod achieves the purpose of adjusting the thickness of the flat film. After the adjustment is completed, the rotary drive device stops working, the cylinder is reset, the wrench is separated from the screw rod, and the left and right moving mechanism is reset. Easy to use and high precision.

Description of drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a partial cross-sectional view along the line A of Fig. 1 .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Example 1

As shown in Figure 1, Figure 2, and Figure 3, a flat film die head with an automatic lip adjustment device includes a die head body 1, a die lip 2 on the die head body 1, and a guide block 3 arranged on the die head body , several fine-tuning screws 4 numbered in sequence, a thickness gauge (not shown in the figure) and a control device; the guide block 3 is set in the groove on the upper part of the die lip 2; the fine-tuning screw 4 passes through the die body 1 and the threaded hole of the guide block 3, the end of the screw 4 abuts against the die lip 2; the control device is connected with the thickness gauge.

It also includes a left and right moving mechanism, a carriage 5, a wrench 6, a feed beam 7, a cylinder 8, a coupling 9 and a rotary drive device,

The left and right moving mechanism is arranged on the die head body 1, and the left and right moving mechanism drives the carriage 5; the wrench 6 is pivotally connected with the feed beam 7, and the cylinder 8 is fixed on the supporting plate 5, and the piston rod of the cylinder 8 is connected with the feed beam 7 fixed connections;

The coupling 9 is fixedly connected with the rotary driving device and cooperates with the wrench 6. The coupling 9 and the wrench 6 slide and fit in the axial direction, and the coupling 9 and the wrench 6 rotate synchronously; the coupling 9 and the wrench 6 Using spline connection, the two can slide relative to each other and rotate synchronously.

The lower end of the wrench 6 is fitted with or separated from the head of the screw rod 4;

The left and right moving mechanism includes a guide rod 101 , a screw shaft 102 , a nut, a first servo motor 103 , a first reducer 105 and a frame plate 104 .

The frame plate 104 is arranged on the two ends of the die body 1, and the two ends of the guide rod 101 are fixedly connected with the frame plate 104; the two ends of the screw shaft 102 are pivotally connected with the frame plate 104; 102 cooperates with nut.

The carriage 5 is slidably connected with the guide rod 101 . The first reducer 105 is fixed on the frame plate 104 , and the output shaft of the first reducer 105 is fixedly connected with the screw shaft 102 ; the first servo motor 103 drives the first reducer 105 .

The rotating mechanism includes a second servo motor 121 and a second speed reducer 122,

The second reducer 122 is fixed on the carriage 5 , and the output shaft of the second reducer 122 is fixedly connected with the coupling 9 ; the second servo motor 121 drives the second reducer 122 .

Thickness gauge: produced by Foshan Zhongkeda Measurement and Control Technology Co., Ltd.

Example 2

As shown in Figure 1, Figure 2, and Figure 3, the adjustment method of the die lip of the flat film die includes the following steps:

(1) The thickness gauge detects the thickness of the flat film immediately, and transmits the detected signal to the control device;

(2) The control device performs arithmetic processing on the detection signal. When the detected thickness data exceeds the standard, the screw 4 with the corresponding number is determined, and the control device notifies the left and right moving mechanism to move to the right;

(3) When the left and right moving mechanism moves to the position of screw 4 determined in step (2), stop moving;

(4) The cylinder 8 moves, and the wrench 6 fits with the head of the screw 4;

(5) The rotary drive mechanism drives the wrench 6 to turn the fine-tuning screw 4 to enter the adjustment;

(6) The rotary drive mechanism stops rotating, the cylinder 8 is reset, and the wrench 6 is separated from the head of the screw 4;

(7) The left and right moving mechanism moves to the left in the direction of the initial position and resets.

What has been described above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, some improvements and modifications can be made without departing from the principle of the present invention, which are also regarded as the protection scope of the present invention.

Claims (4)

1. A flat film die head with a die lip automatic adjustment device, comprising a die head body, a die lip arranged on the die head body, a guide block, several fine-tuning screws, thickness gauges and control devices numbered in sequence; The fine-tuning screw rod passes through the bolt hole on the die body and the threaded hole of the guide block, and its end is against the die lip; the control device is connected with the thickness gauge, and it is characterized in that it also includes a left and right moving mechanism, a carriage, and a wrench , feed beams, cylinders, couplings and rotary drives, The left and right moving mechanism is arranged on the die head body, and the left and right moving mechanism drives the carriage; the wrench is pivotally connected with the feed beam, the cylinder is fixed on the carriage, and the piston rod head of the cylinder is fixedly connected with the feed beam; The coupling is fixedly connected with the rotary driving device and cooperates with the wrench; the coupling and the wrench slide and fit in the axial direction, and the coupling and the wrench rotate synchronously; The lower end of the wrench is fitted with or separated from the head of the screw; the control device is connected with the left and right moving mechanism, the rotary drive device and the cylinder. 2. The flat film die head with automatic lip adjustment device according to claim 1, characterized in that: the left and right moving mechanism comprises a guide rod, a screw shaft, a nut, a first servo motor, a first reducer and a frame plate, The frame plate is arranged at both ends of the die body, and the two ends of the guide rod are fixedly connected with the frame plate; the two ends of the screw shaft are pivotally connected with the frame plate; the nut is fixed on the carriage, and the screw shaft cooperates with the nut; The carriage is slidingly connected with the guide rod; The first reducer is fixed on the frame plate, and the output shaft of the first reducer is fixedly connected with the screw shaft; the reducer is driven by the first servo motor. 3. The flat film die head of the band die lip automatic adjustment device according to claim 1 or 2, characterized in that: the rotating mechanism comprises a second servo motor and a second speed reducer, The second reducer is fixed on the carriage, and the output shaft of the second reducer is fixedly connected with the coupling; the second servo motor drives the reducer. 4. an adjusting method of the flat film die die lip of the flat film die of the band die lip automatic adjustment device of application claim 1, it is characterized in that: it may further comprise the steps: (1) The thickness gauge detects the thickness of the flat film immediately, and transmits the detected signal to the control device; (2) The control device performs arithmetic processing on the detection signal. When the detected thickness data exceeds the standard, the screw with the corresponding number is determined, and the control device notifies the left and right moving mechanism to move; (3) When the left and right moving mechanism moves to the screw position determined in step (2), stop moving; (4) The cylinder moves, and the wrench fits with the head of the screw; (5) The rotary drive mechanism drives the wrench to rotate; (6) The rotary drive mechanism stops rotating, the cylinder is reset, and the wrench is separated from the head of the screw; (7) The left and right moving mechanism moves to the initial position and resets.

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