阅读说明：本技术 卫生用品生产线上的高分子材料缺失检测机构及检测方法 (High polymer material loss detection mechanism and detection method on hygienic product production line ) 是由 陈建筑 吴春木 汤国开 于 2019-09-05 设计创作，主要内容包括：本发明涉及卫生用品生产线上的高分子材料缺失检测机构,包括PLC控制器、红外线电眼、高分子下料斗和集料斗；高分子下料斗设有出料口,集料斗上端对应设有两个耐磨钢片,两个耐磨钢片上均开设有安装圆孔,两个耐磨钢片的安装圆孔内可转动设有转动杆,转动杆的横截面为菱形,转动杆中部设有挡料板,转动杆端部设有平衡臂；红外线电眼设置在集料斗内,红外线电眼与PLC控制器电连接；当没有高分子材料从出料口落到挡料板上,挡料板不遮挡红外线电眼,当高分子材料从出料口落到挡料板上,挡料板受高分子材料下落冲击力往下摆动直至挡料板与水平面夹角大于10°时挡料板遮住红外线电眼。本发明能够准确检测高分子下料斗是否有输送高分子材料。(The invention relates to a high polymer material loss detection mechanism on a hygienic product production line, which comprises a PLC (programmable logic controller), an infrared electric eye, a high polymer discharging hopper and a collecting hopper; the polymer blanking hopper is provided with a discharge port, the upper end of the collecting hopper is correspondingly provided with two wear-resistant steel sheets, mounting round holes are formed in the two wear-resistant steel sheets, a rotating rod can be rotatably arranged in the mounting round holes of the two wear-resistant steel sheets, the cross section of the rotating rod is rhombic, the middle part of the rotating rod is provided with a baffle plate, and the end part of the rotating rod is provided with a balance arm; the infrared electric eye is arranged in the collecting hopper and is electrically connected with the PLC; when no high molecular material falls onto the striker plate from the discharge port, the striker plate does not shield the infrared electric eye, and when the high molecular material falls onto the striker plate from the discharge port, the striker plate is swung downwards by falling impact force of the high molecular material until the striker plate and a horizontal plane included angle are larger than 10 degrees, the striker plate shields the infrared electric eye. The invention can accurately detect whether the polymer discharge hopper conveys the polymer material.)

1. Macromolecular material disappearance detection mechanism on the health supplies production line, its characterized in that: comprises a PLC controller, an infrared electric eye, a polymer blanking hopper and a material collecting hopper; the polymer blanking hopper is provided with a discharge hole, the upper end of the aggregate hopper is correspondingly provided with two wear-resistant steel sheets, mounting round holes are formed in the two wear-resistant steel sheets, a rotating rod is rotatably arranged in the mounting round holes of the two wear-resistant steel sheets, the cross section of the rotating rod is rhombic, the middle part of the rotating rod is provided with a material baffle plate, and the end part of the rotating rod is provided with a balance arm for driving the material baffle plate to be in a nearly horizontal state; the infrared electric eye is arranged in the collecting hopper and is electrically connected with the PLC; when no high polymer material falls onto the striker plate from the discharge hole, the striker plate does not shield the infrared electric eye; when the high polymer material falls onto the striker plate from the discharge hole, the striker plate swings downwards under the falling impact force of the high polymer material until the included angle between the striker plate and the horizontal plane is more than or equal to 10 degrees, and the striker plate covers the infrared electric eye.

2. The loss detection mechanism for polymer materials in the production line of hygienic products according to claim 1, wherein: the wear rate G of the two wear-resistant steel sheets is more than 60G/cm²。

3. The loss detection mechanism for polymer materials in the production line of hygienic products as claimed in claim 2, wherein: a plurality of balancing weights penetrate through the balancing arm, and the lower end of the balancing arm is in threaded connection with a limiting nut used for fixing each balancing weight on the balancing arm.

4. A method for detecting the loss of a polymer material in a production line of a hygienic product, which is applied to the mechanism for detecting the loss of a polymer material in a production line of a hygienic product as claimed in claim 3, is characterized by comprising the following steps:

step one, when a PLC is defined to receive a high level signal, the PLC judges that a high polymer material falls into a collecting hopper from a high polymer discharging hopper; when the PLC receives a low level signal, the PLC judges that no high polymer material falls into the aggregate bin from the high polymer discharging bin;

step two, when the infrared electric eye is defined to be shielded, the infrared electric eye sends a high-level signal to the PLC; when the infrared electric eye is not shielded, the infrared electric eye sends a low level signal to the PLC;

adjusting the mounting position of the infrared electric eye in the material collecting hopper, so that the infrared electric eye is shielded when the striker plate swings downwards until the included angle between the striker plate and the horizontal plane is more than or equal to 10 degrees;

step four, in the debugging stage, setting a polymer blanking hopper to start to convey the polymer material at a constant speed, and simultaneously adjusting the number of the balancing weights, so that when the polymer material falls from the polymer blanking hopper to the striker plate, the included angle between the striker plate and the horizontal plane is a, and the a is larger than 10 degrees;

and step five, after debugging is finished, controlling the polymer discharging hopper to discharge at the constant speed set in the step four, detecting an electric signal transmitted by the infrared electric eye on line by the PLC, and if the PLC receives a low-level signal transmitted by the infrared electric eye and judges that no polymer material falls into the collecting hopper from the polymer discharging hopper, outputting an alarm signal by the PLC.

Technical Field

The invention relates to production equipment of disposable sanitary products, in particular to a high polymer material loss detection mechanism and a detection method on a sanitary product production line.

Background

An absorbent core of a disposable sanitary product such as a sanitary napkin or a diaper has a strong water absorption property, and its main water absorbing component is a mixture of cotton-like wood pulp and a super absorbent resin (hereinafter referred to as a polymer material). The manufacturing process of the absorption core generally comprises the steps of conveying a high polymer material into a forming bin through a high polymer discharging hopper, then adsorbing the high polymer material into each forming cavity of a forming die wheel under the negative pressure action of an adsorption forming die wheel to form the absorption core of the sanitary towel/paper diaper, and conveying the formed absorption core to subsequent equipment through a conveying belt. As shown in fig. 1, in order to ensure that the absorbent core has a polymer material, the current practice in the industry for detecting the polymer material on the absorbent core of the sanitary napkin is to arrange an infrared electric eye 200 (the infrared electric eye includes an infrared emitter and an infrared receiver) on a conveyor belt 100 for detecting whether the absorbent core 300 has the polymer material, the infrared electric eye 200 uses a photosensitive element as a sensing element to work, the infrared emitter emits infrared rays, the infrared receiver senses different light reflections, and has different reactions on a measuring circuit to generate different actions, which is the prior art, and details are not repeated herein.

The inventor points out that in the actual use process, the detection effect of whether the absorption core on the infrared electric eye detection conveying belt has the high molecular material is not ideal by directly utilizing the mode, particularly in the production process of the sanitary towel, the high molecular material adopted on the sanitary towel is less, the high molecular material on the absorption core of the sanitary towel is scattered sparsely and dispersedly and has no rule, the high molecular material on the absorption core of the infrared electric eye detection sanitary towel flickers all the time, misjudgment is often generated in the actual production process, the accuracy of the infrared electric eye detection is low, the yield of products is influenced, shutdown is caused by the misjudgment on a production line, and the production efficiency of enterprises is influenced.

Disclosure of Invention

Therefore, in order to solve the above problems, the present invention provides a high molecular material loss detection mechanism and a detection method for a hygienic product production line, which can accurately detect whether a high molecular material is conveyed by a high molecular material feeding funnel on the hygienic product production line.

In order to achieve the purpose, the invention adopts the following technical scheme: the high polymer material loss detection mechanism on the production line of the hygienic products comprises a PLC controller, an infrared electric eye, a high polymer blanking hopper and a collecting hopper; the polymer blanking hopper is provided with a discharge hole, the upper end of the aggregate hopper is correspondingly provided with two wear-resistant steel sheets, mounting round holes are formed in the two wear-resistant steel sheets, a rotating rod is rotatably arranged in the mounting round holes of the two wear-resistant steel sheets, the cross section of the rotating rod is rhombic, the middle part of the rotating rod is provided with a material baffle plate, and the end part of the rotating rod is provided with a balance arm for driving the material baffle plate to be in a nearly horizontal state; the infrared electric eye is arranged in the collecting hopper and is electrically connected with the PLC; when no high polymer material falls onto the striker plate from the discharge hole, the striker plate does not shield the infrared electric eye; when the high polymer material falls onto the striker plate from the discharge hole, the striker plate swings downwards under the falling impact force of the high polymer material until the included angle between the striker plate and the horizontal plane is more than or equal to 10 degrees, and the striker plate covers the infrared electric eye.

Further, the wear rate G of the two wear-resistant steel sheets is more than 60G/cm²。

Furthermore, a plurality of balancing weights penetrate through the balancing arm, and the lower end of the balancing arm is in threaded connection with a limiting nut used for fixing each balancing weight on the balancing arm.

A high polymer material loss detection method on a hygienic product production line is applied to a high polymer material loss detection mechanism on the hygienic product production line, and comprises the following steps:

step one, when a PLC is defined to receive a high level signal, the PLC judges that a high polymer material falls into a collecting hopper from a high polymer discharging hopper; when the PLC receives a low level signal, the PLC judges that no high polymer material falls into the aggregate bin from the high polymer discharging bin;

step two, when the infrared electric eye is defined to be shielded, the infrared electric eye sends a high-level signal to the PLC; when the infrared electric eye is not shielded, the infrared electric eye sends a low level signal to the PLC;

adjusting the mounting position of the infrared electric eye in the material collecting hopper, so that the infrared electric eye is shielded when the striker plate swings downwards until the included angle between the striker plate and the horizontal plane is more than or equal to 10 degrees;

step four, in the debugging stage, setting a polymer blanking hopper to start to convey the polymer material at a constant speed, and simultaneously adjusting the number of the balancing weights, so that when the polymer material falls from the polymer blanking hopper to the striker plate, the included angle between the striker plate and the horizontal plane is a, and the a is larger than 10 degrees;

and step five, after debugging is finished, controlling the polymer discharging hopper to discharge at the constant speed set in the step four, detecting an electric signal transmitted by the infrared electric eye on line by the PLC, and if the PLC receives a low-level signal transmitted by the infrared electric eye and judges that no polymer material falls into the collecting hopper from the polymer discharging hopper, outputting an alarm signal by the PLC.

By adopting the technical scheme, the invention has the beneficial effects that:

(1) circular through-hole is seted up to two wear-resisting steel sheets on the collecting hopper, and the cross section of dwang is the rhombus, and through setting up like this and making the dwang wear to establish in the circular through-hole of two wear-resisting steel sheets, only the arris of dwang and the internal surface of circular through-hole face of touching mutually, area of contact is little, and dwang pivoted sensitivity is high. And preferably, the wear rate G of the two wear-resistant steel sheets is more than 60G/cm, so that the service life of the wear-resistant steel sheets is ensured to be long.

(2) The middle part of the rotating rod is provided with a material baffle plate, the end part of the rotating rod is provided with a balance arm, and when the material baffle plate is not influenced by external force, the rotating rod is driven to rotate by the gravity of the balance arm so that the material baffle plate is in a nearly horizontal state; when the macromolecule blanking hopper conveys the macromolecule materials, the falling impact force of the macromolecule materials pushes the striker plate to swing downwards, the infrared electric eye is arranged in the material collecting hopper by utilizing the principle, and when the angle between the striker plate and the horizontal plane is less than 10 degrees, the infrared electric eye is not blocked by the striker plate; when the angle between striker plate and the horizontal plane is more than or equal to 10, infrared ray electric eye is blocked by the striker plate, makes the reflected light that infrared ray electric eye received stable like this, and infrared ray electric eye produces different signals of telecommunication according to the reverberation of receipt and gives the PLC controller, and the PLC controller accuracy detects whether polymer unloading funnel has the transport macromolecular material on the hygienic products production line.

(3) Can be according to the polymer unloading funnel transmission macromolecular material speed of reality, through set up corresponding quantity balancing weight on the balance arm to improve dwang wobbling sensitivity.

Drawings

FIG. 1 is a schematic diagram of the structure of a polymeric material currently being tested in the industry for use on the absorbent core of a sanitary napkin;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view illustrating a polymer feeding funnel according to an embodiment of the present invention without transferring a polymer material;

FIG. 4 is an enlarged view at A in FIG. 3;

fig. 5 is a schematic cross-sectional view illustrating a polymer material feeding funnel according to an embodiment of the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.