Plastic-coated writing pen preparation device and method

Abstract

The embodiments of the present disclosure disclose a device and method for preparing a plastic-coated writing pen. A specific embodiment of the device for preparing a plastic-coated writing pen includes a writing pen transmission device, a coating device, a baking device, a cooling device, and a controller. The writing pen transmission device includes an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt, and a coated writing pen conveyor belt; the coating device includes a primer coating device and a molten plastic coating device; the controller is configured to perform the following steps: control the primer coating device to perform a primer spraying operation on the writing pen; control the baking device to perform a coating drying process on the writing pen; control the molten plastic coating device to perform a molten plastic coating process on the writing pen; control the cooling device to perform a coating cooling process on the writing pen; and control the coated writing pen conveyor belt to transmit the cooled writing pen. This embodiment improves the grip of the writing pen and further enhances the comfort and safety of the user.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of preparing plastic-coated writing pens, and more particularly to equipment and methods for preparing plastic-coated writing pens. Background Art

[0002] A writing pen is a tool widely used for writing and drawing sketches. Currently, common writing pens on the market are usually made of wood and coated with paint on the outer layer.

[0003] However, in the process of using this type of writing pen, the following technical problems usually occur:

[0004] First, traditional wooden writing pens are hard, which can cause calluses on the user's hands after prolonged use, making them less comfortable to use. Furthermore, the paint coating on the outer layer of writing pens often peels off easily, which can be harmful to children if accidentally ingested.

[0005] Second, when producing writing pens, defective writing pens are often removed from the production line through manual visual inspection. This method has high labor costs and is time-consuming and labor-intensive, and is prone to omissions.

[0006] The above information disclosed in this Background section is only for enhancement of understanding of the background of the inventive concept and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the Invention

[0007] The content of this disclosure is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this disclosure is not intended to identify key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0008] Some embodiments of the present disclosure provide a device and method for preparing a plastic-coated writing pen to solve one or more of the technical problems mentioned in the above background technology section.

[0009] In a first aspect, some embodiments of the present disclosure provide a device for preparing a plastic-coated writing pen, comprising a writing pen conveying device, a coating device, a baking device, a cooling device and a controller, wherein the writing pen conveying device comprises an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt and a coated writing pen conveyor belt, the uncoated writing pen conveyor belt and the primer-coated writing pen conveyor belt are aligned and connected, and the molten plastic-coated writing pen conveyor belt and the coated writing pen conveyor belt are aligned and connected; the coating device comprises a primer coating device and a molten plastic coating device, the primer coating device is arranged above the uncoated writing pen conveying device, and the molten plastic coating device is located between the baking device and the cooling device; the baking device is configured to dry the writing pen coated with the primer coating, and the primer-coated writing pen conveyor belt passes through the baking device; the cooling device The device is configured to cool writing pens coated with molten plastic coating, and the above-mentioned molten plastic coating writing pen conveyor belt passes through the above-mentioned cooling device; the above-mentioned writing pen transmission device, the above-mentioned coating device, the above-mentioned baking device, the above-mentioned cooling device and the above-mentioned controller are communicatively connected, and the above-mentioned controller is configured to perform the following steps: control the above-mentioned primer coating device to perform primer spraying operation on the writing pens on the above-mentioned uncoated writing pen conveyor belt; control the above-mentioned baking device to perform coating drying treatment on the writing pens on the above-mentioned primer coating writing pen conveyor belt; control the above-mentioned molten plastic coating device to perform molten plastic coating treatment on the writing pens after the coating drying treatment, and move the writing pens after the molten plastic coating treatment to the above-mentioned molten plastic coating writing pen conveyor belt; control the above-mentioned cooling device to perform coating cooling treatment on the writing pens on the above-mentioned molten plastic coating writing pen conveyor belt; control the above-mentioned coated writing pen conveyor belt to transport the above-mentioned cooled writing pens.

[0010] Optionally, the plastic-coated writing pen preparation equipment also includes a heating device and a molten plastic transmission device, the heating device includes a heating container, the heating container has a solid plastic feed port, a color paste feed port and a molten plastic discharge port, the spray silicone transmission device includes a molten plastic transmission pipe and a pipe insulation material, the pipe insulation material is wrapped around the outside of the molten plastic transmission pipe, and the molten plastic transmission pipe is threadedly connected to the molten plastic discharge port.

[0011] Optionally, the controller is further configured to perform the following steps: controlling the heating container in the heating device to heat and stir the solid plastic and color paste delivered by the solid plastic feed port and the color paste feed port, and outputting the stirred molten plastic through the molten plastic discharge port.

[0012] Optionally, the molten plastic coating device includes a spray track and a spray gun, the spray track is respectively connected to the primer coating writing pen conveyor belt and the molten plastic coating conveyor, the spray gun is suspended above the molten plastic conveying device, and the spray gun is threadedly connected to the molten plastic conveying pipe; the controller controls the molten plastic coating device to perform molten plastic coating on the writing pen after the coating drying treatment, and moves the writing pen after the molten plastic coating treatment to the molten plastic coating writing pen conveyor belt by executing the following steps: controlling the spray gun to perform molten plastic spraying operation on the writing pen on the spray track.

[0013] Optionally, the molten plastic coating device includes a dipping container, a lifting hollow disk and a grabbing device, the lifting hollow disk is connected to the bottom of the dipping container through an electric push rod, the lifting hollow disk can move up and down in the dipping container, the dipping container is threadedly connected to the molten plastic transmission device, and the dipping container is used to hold the molten plastic conveyed by the molten plastic transmission device; the controller controls the molten plastic coating device to perform molten plastic coating on the writing pen after the coating drying process, and moves the writing pen after the molten plastic coating process to the molten plastic coating writing pen conveyor belt by performing the following steps: controlling the grabbing device to move the writing pen after the coating drying process on the primer coating writing pen conveyor belt into the dipping container; controlling the lifting hollow disk in the dipping container to lift the writing pen in the dipping container upward and away from the molten plastic in the dipping container; controlling the grabbing device to move the writing pen on the lifting hollow disk to the molten plastic coating writing pen conveyor belt.

[0014] Optionally, the molten plastic coating device includes a push-pull device and a pumping device, the pumping device includes a coating tank, a pumping hole inlet and a pumping hole outlet, the pumping hole inlet and the pumping hole outlet are respectively located at the two ends of the coating tank, the pumping hole outlet is provided with a rubber leather ring, the rubber leather ring is sleeve-connected to the pumping hole outlet, a feed opening is provided above the coating tank, the molten plastic conveying device is threadedly connected to the feed opening above the coating tank, the coating tank is used to hold molten plastic, and the length of the pumping device is less than the length of the writing pen; the control The device controls the molten plastic coating device to perform molten plastic coating on the writing pen after the coating drying process, and moves the writing pen after the molten plastic coating process to the molten plastic coating writing pen conveyor belt by executing the following steps: controls the push-pull device to push the writing pen after the coating drying process on the primer coating writing pen conveyor belt into the paint tank from the inlet of the extraction hole; controls the push-pull device to pull the writing pen from the outlet of the extraction hole, and moves the writing pen to the molten plastic coating writing pen conveyor belt.

[0015] Optionally, the above-mentioned plastic-coated writing pen preparation equipment also includes a defective product rejection device, which is communicatively connected to the above-mentioned controller, and the above-mentioned defective product rejection device includes a first laser distance measuring sensor, a second laser distance measuring sensor, a laser signal processor and a robotic arm, and the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor are respectively installed on both sides of the above-mentioned coated writing pen conveyor belt, the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor are opposite to each other, and the distance between the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor is a fixed value, and the above-mentioned robotic arm is set on either side of the above-mentioned coated writing pen conveyor belt; the above-mentioned defective product rejection device is configured to perform the following Steps: In response to determining that the writing pens on the coated writing pen conveyor belt pass through the first laser distance measuring sensor and the second laser distance measuring sensor, the writing pens on the coated writing pen conveyor belt are laser measured by the first laser distance measuring sensor and the second laser distance measuring sensor to obtain measurement data; the measurement data are processed by the laser signal processor to obtain a writing pen length recognition result; in response to determining that the writing pen length recognition result meets the rejection condition, the writing pen length recognition result is sent to the controller; based on the received writing pen length recognition result, the robotic arm is controlled to perform a grasping operation corresponding to the writing pen length recognition result.

[0016] In a second aspect, some embodiments of the present disclosure provide a method for preparing a plastic-coated writing pen, which is applied to the plastic-coated writing pen preparation equipment as described in the first aspect, wherein the plastic-coated writing pen preparation equipment includes a writing pen transmission device, a coating device, a baking device, a cooling device and a controller, the writing pen transmission device includes an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic coating writing pen conveyor belt and a coated writing pen conveyor belt, the coating device includes a primer coating device and a molten plastic coating device, and the method includes: controlling the primer coating device to apply pressure to the upper The writing pens on the uncoated writing pen conveyor belt are subjected to primer spraying operation; the baking device is controlled to perform coating drying treatment on the writing pens on the primer-coated writing pen conveyor belt; the molten plastic coating device is controlled to perform molten plastic coating treatment on the writing pens after the coating drying treatment, and the writing pens after the molten plastic coating treatment are moved to the molten plastic coated writing pen conveyor belt; the cooling device is controlled to perform coating cooling treatment on the writing pens on the molten plastic coated writing pen conveyor belt; and the coated writing pen conveyor belt is controlled to transport the cooled writing pens.

[0017] Optionally, the above-mentioned plastic-coated writing pen preparation equipment also includes a defective product rejection device, which is communicatively connected to the above-mentioned controller. The above-mentioned defective product rejection device includes a first laser distance measuring sensor, a second laser distance measuring sensor, a laser signal processor and a robotic arm. The above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor are respectively installed on both sides of the above-mentioned coated writing pen conveyor belt, the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor are opposite to each other, the distance between the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor is a fixed value, and the above-mentioned robotic arm is arranged on any one side of the above-mentioned coated writing pen conveyor belt. The above method also includes: in response to determining that the writing pens on the above-mentioned coated writing pen conveyor belt pass through the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor, performing laser measurement processing on the writing pens on the above-mentioned coated writing pen conveyor belt through the first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor to obtain measurement data; processing the above-mentioned measurement data through the above-mentioned laser signal processor to obtain a writing pen length recognition result; in response to determining that the above-mentioned writing pen length recognition result meets the rejection condition, sending the above-mentioned writing pen length recognition result to the above-mentioned controller; according to the received writing pen length recognition result, controlling the above-mentioned robotic arm to perform a grasping operation corresponding to the above-mentioned writing pen length recognition result.

[0018] Optionally, the apparatus for preparing plastic-coated writing pens includes a marking spraying device, which includes a writing pen holder and a marking sprayer. The method further includes: controlling the writing pen holder to grab and secure the writing pens on the coated writing pen conveyor belt; controlling the marking spraying device to apply a marking spray to the secured writing pens; and controlling the writing pen holder to release the writing pens after the marking spraying operation.

[0019] Optionally, the defective product rejection device also includes a camera and a rolling device. The camera is installed directly above the coated writing pen conveyor belt, and the rolling device is installed on the coated writing pen conveyor belt directly below the camera. The rolling device rotates the writing pens on the coated writing pen conveyor belt at an angle of 150 degrees each time. The above method also includes: controlling the above rolling device to rotate the above writing pen three times in sequence; controlling the above camera to take a picture of the writing pen after each rotation to obtain a writing pen image group; cropping the writing pen area in each writing pen image in the above writing pen image group to obtain a cropped area image group; performing plane projection processing on each cropped area image in the above cropped area image group to obtain a writing pen projection image group; performing pairwise matching on the writing pen projection images in the above writing pen projection image group to obtain matching information; splicing the writing pen projection images in the above writing pen projection image group based on the matching information to obtain a writing pen spliced ​​image; determining whether the mark on the above writing pen is skewed or missing and whether the coating of the above writing pen is missing based on the above writing pen spliced ​​image; in response to determining that the mark on the above writing pen is not skewed or missing and the coating of the above writing pen is not missing, determining that the above writing pen passes the appearance inspection; in response to determining that the mark on the above writing pen is skewed or missing or the coating of the above writing pen is missing, determining that the above writing pen passes the appearance inspection.

[0020] Optionally, the above-mentioned pairwise matching of the writing pen projection images in the above-mentioned writing pen projection image group to obtain matching information may include the following steps: selecting two writing pen projection images that have not been matched with each other from the writing pen projection images in the above-mentioned writing pen projection image group as the target writing pen projection image and the reference writing pen projection image, and performing the following matching sub-steps using the above-mentioned target writing pen projection image and the above-mentioned reference writing pen projection image: selecting a grid area from the edge of the above-mentioned target writing pen projection image as the target grid area, wherein the shape of the above-mentioned target grid area is a square; selecting grid areas in the above-mentioned reference writing pen projection image in sequence as reference grid areas to obtain a reference grid area set, Among them, there are no gaps or overlapping parts between the reference grid areas in the above-mentioned reference grid area set; determine the average value of each color value in the above-mentioned target grid area and each reference grid area in the above-mentioned reference grid area set; select the reference grid area with the smallest sum of the average value of each color value and the average value of the color value of the above-mentioned target grid area from the above-mentioned reference grid area set as the preliminary matching reference grid; determine the sum of the square of the average value of the color value of the above-mentioned preliminary matching reference grid area and the average value of the color value of the above-mentioned target grid area as the reference average value; in response to determining that the above-mentioned reference average value is less than or equal to a preset threshold, the center point coordinates of the above-mentioned preliminary matching reference grid area and the above-mentioned target grid area are added to the above-mentioned matching information as a matching coordinate pair.

[0021] The various embodiments disclosed above have the following beneficial effects: Plastic-coated writing pens produced by the plastic-coated writing pen production apparatus of some embodiments of the present disclosure can improve user comfort and safety during use. Specifically, the reason why related writing pens suffer from poor user comfort and low safety during use is that wooden writing pens are relatively hard, and long-term use can easily cause calluses on the user's hands. Furthermore, the paint coating on the outer layer of the writing pen often falls off easily, and if accidentally ingested by children, it may be harmful to their health. Based on this, the production of plastic-coated writing pens in some embodiments of the present disclosure includes a writing pen conveyor device, a coating device, a baking device, a cooling device, and a controller. The writing pen conveyor device includes an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt, and a coated writing pen conveyor belt. The uncoated writing pen conveyor belt and the primer-coated writing pen conveyor belt are aligned and connected, and the molten plastic-coated writing pen conveyor belt and the coated writing pen conveyor belt are aligned and connected. The coating device includes a primer coating device and a molten plastic coating device. The primer coating device is disposed above the uncoated writing pen conveyor, and the molten plastic coating device is located between the baking device and the cooling device. The baking device is configured to dry the writing pens coated with the primer coating, and the primer-coated writing pen conveyor belt passes through the baking device. The cooling device is configured to cool the writing pens coated with the molten plastic coating, and the molten plastic-coated writing pen conveyor belt passes through the cooling device. The writing pen conveyor, the coating device, the baking device, the cooling device, and the controller are communicatively connected. The controller is configured to perform the following steps: controlling the primer coating device to apply primer to the writing pens on the uncoated writing pen conveyor belt. Controlling the baking device to dry the coating on the writing pens on the primer-coated writing pen conveyor belt. Thus, by spraying a layer of primer on the unprocessed writing pens, the surface of the writing pens is more susceptible to subsequent adhesion of molten plastic. The molten plastic coating device is controlled to coat the writing pens after the coating drying process with molten plastic, and the pens after the molten plastic coating process are moved to the molten plastic coated writing pen conveyor. The cooling device is controlled to cool the coating on the writing pens on the molten plastic coated writing pen conveyor. The cooling process cools and solidifies the molten plastic coating on the surface of the writing pens. The coated writing pen conveyor is controlled to transport the cooled writing pens. Thus, by adding a layer of plastic to the untreated surface of the writing pen and performing injection molding, the exterior of the writing pen can be completely encapsulated.Because plastic itself has the soft property, it not only improves the feel when holding, but also further enhances the comfort and safety of users due to its environmentally friendly and non-toxic properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that components and elements are not necessarily drawn to scale.

[0023] Figure 1 1 is a schematic structural diagram of some embodiments of the apparatus for preparing a plastic-coated writing pen according to the present disclosure;

[0024] Figure 2 Flowcharts of some embodiments of the method for preparing a plastic-coated writing pen according to the present disclosure. DETAILED DESCRIPTION

[0025] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0026] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0027] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0028] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0029] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0030] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] Figure 1 It is a schematic structural diagram of some embodiments of the plastic-coated writing pen preparation equipment of some embodiments of the present disclosure. Figure 1 It includes an uncoated writing pen conveyor belt 1, a primer-coated writing pen conveyor belt 2, a molten plastic-coated writing pen conveyor belt 3, a coated writing pen conveyor belt 4, a primer coating device 5, a molten plastic coating device 6, a baking device 7 and a cooling device 8.

[0032] In some embodiments, the plastic-coated writing pen production equipment may include a writing pen transport device, a coating device, a baking device 7, a cooling device 8, and a controller. The writing pen transport device may be used to transport writing pens. The writing pen transport device may include an uncoated writing pen conveyor belt 1, a primer-coated writing pen conveyor belt 2, a molten plastic-coated writing pen conveyor belt 3, and a coated writing pen conveyor belt 4. The coating device may be a device for applying a coating to the surface of a writing pen. The coating device may include a primer coating device 5 and a molten plastic coating device 6. By way of example, both the primer coating device 5 and the molten plastic coating device 6 may be spray guns. The baking device 7 may be a device for drying the primer on the surface of the writing pen. By way of example, the baking device 7 may be an oven. The cooling device 8 may be a device for cooling and solidifying the molten plastic on the surface of the writing pen. By way of example, the cooling device 8 may be an air-cooled chiller. The controller may be a device for controlling other devices and machines. For example, the controller may be a single-chip microcomputer.

[0033] In some embodiments, the writing pen transport device includes an uncoated writing pen conveyor belt 1, a primer-coated writing pen conveyor belt 2, a molten plastic-coated writing pen conveyor belt 3, and a coated writing pen conveyor belt 4. The uncoated writing pen conveyor belt 1 and the primer-coated writing pen conveyor belt 2 are aligned and connected. The molten plastic-coated writing pen conveyor belt 3 and the coated writing pen conveyor belt 4 are aligned and connected.

[0034] In some embodiments, the coating device includes a primer coating device 5 and a molten plastic coating device 6. The primer coating device 5 is disposed above the uncoated writing pen transport device 1. The molten plastic coating device 6 is located between the baking device 7 and the cooling device 8.

[0035] In some embodiments, the baking device 7 is configured to dry the writing pen coated with the primer coating, and the primer coating writing pen conveyor belt 2 passes through the baking device 7.

[0036] In some embodiments, the cooling device 8 is configured to cool the writing pen coated with the molten plastic coating, and the molten plastic coating writing pen conveyor belt 3 passes through the cooling device 8 .

[0037] In some embodiments, the writing pen transmission device, the coating device, the baking device 7, the cooling device 8 and the controller are communicatively connected. Here, the specific manner in which the writing pen transmission device, the coating device, the baking device 7, the cooling device 8 and the controller are communicatively connected is not limited. As an example, the specific manner may be a wireless connection manner and a wired connection manner. The wireless connection manner may include but is not limited to 3G / 4G connection, WiFi connection, Bluetooth connection, WiMAX connection, Zigbee connection, UWB (ultra wideband) connection, and other wireless connection manners currently known or to be developed in the future.

[0038] In some embodiments, the controller is configured to perform the following steps:

[0039] The first step is to control the primer coating device 5 to spray primer onto the pens on the uncoated pen conveyor belt 1. In practice, the primer coating device 5 can spray primer onto the pens on the uncoated pen conveyor belt 1. After passing through the primer coating device 5, the pens on the uncoated pen conveyor belt 1 directly enter the primer-coated pen conveyor belt 2.

[0040] The second step is to control the baking device 7 to perform a coating drying process on the writing pens on the primer-coated writing pen conveyor belt 2. In practice, the writing pens pass directly through the baking device 7 via the primer-coated writing pen conveyor belt 2, thereby completing the primer treatment.

[0041] The third step is to control the molten plastic coating device 6 to coat the writing pens after the coating drying process with molten plastic, and to move the pens after the molten plastic coating process onto the molten plastic coating writing pen conveyor belt. In practice, the molten plastic coating device 6 can be a spray gun. The molten plastic coating device 6 can spray molten plastic onto the writing pens on the primer coating writing pen conveyor belt 2. After passing through the molten plastic coating device 6, the writing pens on the primer coating writing pen conveyor belt 2 directly enter the molten plastic coating writing pen conveyor belt 3.

[0042] The fourth step is to control the cooling device 8 to perform a coating cooling process on the writing pens on the molten plastic coating writing pen conveyor belt 3. In practice, the writing pens pass through the cooling device 8 on the molten plastic coating writing pen conveyor belt 3 to complete cooling.

[0043] The fifth step is to control the coated writing pen conveyor belt 4 to transport the cooled writing pens.

[0044] Beneficial effects

[0045] Continue to refer Figure 2 , shows a process 200 of some embodiments of the method for preparing a plastic-coated writing pen according to the present disclosure. The method for preparing a plastic-coated writing pen comprises the following steps:

[0046] Step 201 : Controlling a primer coating device to perform a primer spraying operation on writing pens on an uncoated writing pen conveyor belt.

[0047] In some embodiments, the execution subject of the method for preparing a plastic coating writing pen (such as Figure 1 The plastic-coated writing pen preparation equipment shown in the figure) can control the primer coating device to perform a primer spraying operation on the writing pens on the uncoated writing pen conveyor belt. The writing pen conveying device may include an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt and a coated writing pen conveyor belt. The uncoated writing pen conveyor belt and the primer-coated writing pen conveyor belt may be aligned and connected. The molten plastic-coated writing pen conveyor belt and the coated writing pen conveyor belt may be aligned and connected. The coating device may include a primer coating device and a molten plastic coating device. The primer coating device may be arranged above the uncoated writing pen conveying device. The molten plastic coating device may be located between the baking device and the cooling device. The baking device may be configured to dry the writing pens coated with the primer coating. The primer-coated writing pen conveyor belt may pass through the baking device. The cooling device can be configured to cool writing pens coated with the molten plastic coating. The molten plastic-coated writing pen conveyor belt can pass through the cooling device. The writing pen conveyor device, the coating device, the baking device, and the cooling device can be communicatively connected to the controller.

[0048] As examples, the writing pen may include, but is not limited to, a pencil, a fountain pen, a ballpoint pen, a straight liquid pen, and a fountain pen.

[0049] In practice, the primer coating device can spray primer onto the writing pens on the uncoated writing pen conveyor belt. After passing through the primer coating device, the writing pens on the uncoated writing pen conveyor belt directly enter the primer coated writing pen conveyor belt.

[0050] Step 202: Control the primer coating device to perform a primer spraying operation on the writing pens on the uncoated writing pen conveyor belt.

[0051] In some embodiments, the execution entity may control the baking device to dry the primer coating on the writing pens on the primer coating writing pen conveyor. In practice, the writing pens pass directly through the baking device via the primer coating writing pen conveyor, thereby completing the primer coating.

[0052] Step 203 , controlling the molten plastic coating device to perform molten plastic coating on the writing pen after the coating drying process, and moving the writing pen after the molten plastic coating process to the molten plastic coating writing pen conveyor belt.

[0053] In some embodiments, the execution entity can control the molten plastic coating device to apply a molten plastic coating to writing pens that have undergone a coating drying process, and to move the writing pens that have undergone the molten plastic coating process to the molten plastic coating conveyor belt. In practice, the molten plastic coating device can be a spray gun. The molten plastic coating device 6 can spray molten plastic onto the writing pens on the primer coating writing pen conveyor belt. After passing through the molten plastic coating device, the writing pens on the primer coating writing pen conveyor belt directly enter the molten plastic coating writing pen conveyor belt.

[0054] Step 204 , controlling the cooling device to perform coating cooling on the writing pens on the molten plastic coating writing pen conveyor belt.

[0055] In some embodiments, the execution body can control the cooling device to perform a coating cooling process on the writing pens on the molten plastic coating writing pen conveyor belt. In practice, the writing pens pass through the cooling device on the molten plastic coating writing pen conveyor belt to complete cooling.

[0056] Step 205: Control the coated writing pen conveyor belt to transport the cooled writing pen.

[0057] In some embodiments, the execution entity may control the coated writing pen conveyor belt to transport the cooled writing pen.

[0058] Optionally, the above-mentioned plastic-coated writing pen preparation equipment also includes a defective product rejection device. The above-mentioned defective product rejection device is communicatively connected to the above-mentioned controller. The above-mentioned defective product rejection device may include a first laser distance measuring sensor, a second laser distance measuring sensor, a laser signal processor and a robotic arm. The above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor are respectively installed on both sides of the above-mentioned coated writing pen conveyor belt. The above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor are directly opposite to each other. The distance between the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor is a fixed value. The above-mentioned robotic arm is arranged on either side of the above-mentioned coated writing pen conveyor belt. In practice, the above-mentioned fixed value is slightly larger than the width of the above-mentioned coated writing pen conveyor belt.

[0059] Optionally, the above execution entity may further perform the following steps:

[0060] The first step is to, in response to determining that the writing pens on the above-mentioned coated writing pen conveyor belt pass through the above-mentioned first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor, perform laser measurement processing on the writing pens on the above-mentioned coated writing pen conveyor belt through the first laser distance measuring sensor and the above-mentioned second laser distance measuring sensor to obtain measurement data.

[0061] As an example, the measurement data includes a time difference between a first laser distance measurement sensor signal being transmitted and received, and a time difference between a second laser distance measurement sensor signal being transmitted and received.

[0062] In the second step, the measurement data is processed by the laser signal processor to obtain a writing pen length recognition result.

[0063] As an example, the quotient of the time difference between the transmission and reception time of the first laser distance sensor signal and the time difference between the transmission and reception time of the second laser distance sensor signal and 2 can be calculated to obtain a first quotient value and a second quotient value. The first quotient value and the second quotient value are respectively multiplied by the speed of light to determine the first distance value and the second distance value. The first distance value and the second distance value are subtracted from the above fixed value to obtain the writing pen length value. The writing pen length value can be used as the writing pen length recognition result.

[0064] In a third step, in response to determining that the writing pen length recognition result satisfies a rejection condition, the writing pen length recognition result is sent to the controller, wherein the rejection condition may be that the writing pen length value in the writing pen length recognition result is less than a target writing pen length value.

[0065] The fourth step is to control the above-mentioned robotic arm to perform a grasping operation corresponding to the above-mentioned writing pen length recognition result based on the received writing pen length recognition result.

[0066] The above-mentioned step of measuring the length of a writing pen, as an inventive feature of an embodiment of the present disclosure, addresses the second technical problem mentioned in the background art: "Currently, when producing writing pens, defective pens are often removed from the production line through manual visual inspection. This method is labor-intensive, time-consuming, and prone to omissions." The factors contributing to this technical problem are often as follows: Currently, when producing writing pens, defective pens are often removed from the production line through manual visual inspection. If these factors are addressed, the efficiency of removing defective pens can be improved. To achieve this, the present disclosure introduces a first laser distance sensor and the aforementioned second laser distance sensor, positioned opposite each other on either side of a conveyor belt. Utilizing the principle of laser distance measurement, the distance between the first and second laser distance sensors and the writing pen is measured as the writing pen passes between them. The length of the writing pen is then determined based on the fixed distance between the first and second laser distance sensors. This allows the removal of coated writing pens that do not meet the required length requirements. Compared with the manual removal method, the efficiency is greatly improved.

[0067] Optionally, the above-mentioned plastic-coated writing pen manufacturing device further includes a marking spraying device. The above-mentioned marking spraying device may include a writing pen holder and a marking sprayer. The above-mentioned execution subject may further perform the following steps:

[0068] The first step is to control the writing pen holder to grab and fix the writing pen on the coated writing pen conveyor belt.

[0069] The second step is to control the marking spraying device to perform a marking spraying operation on the fixed writing pen.

[0070] The third step is to control the writing pen holder to perform a fixing release operation after performing the marking spraying operation.

[0071] Optionally, the defective product rejection device further includes a camera and a rolling device. The camera can be mounted directly above the coated writing pen conveyor belt. The rolling device can be mounted on the coated writing pen conveyor belt directly below the camera. The rolling device can rotate the writing pens on the coated writing pen conveyor belt in 150-degree increments. This ensures that the images captured by the camera of the writing pens overlap, facilitating subsequent image matching and splicing.

[0072] Optionally, the above execution entity may further perform the following steps:

[0073] The first step is to control the rolling device to rotate the writing pen three times in sequence.

[0074] The second step is to control the camera to take pictures of the writing pen after each rotation to obtain a group of writing pen images.

[0075] The third step is to crop the writing pen area in each writing pen image in the writing pen image group to obtain a cropped area image group.

[0076] In the fourth step, each cropping area image in the cropping area image group is subjected to a plane projection process to obtain a writing pen projection image group. The plane projection process can be performed on each cropping area image in the cropping area image group by using a perspective change or an affine transformation.

[0077] The fifth step is to perform pairwise matching on the writing pen projection images in the writing pen projection image group to obtain matching information.

[0078] In a sixth step, based on the matching information, the writing pen projection images in the writing pen projection image group are spliced ​​to obtain a writing pen spliced ​​image.

[0079] In the seventh step, it is determined whether the mark on the writing pen is skewed or missing and whether the coating of the writing pen is missing based on the spliced ​​image of the writing pen.

[0080] In step eight, in response to determining that the marking on the writing pen is not skewed or missing and the coating of the writing pen is not missing, determine that the writing pen passes the appearance inspection.

[0081] In step nine, in response to determining that the marking on the writing pen is skewed or missing or the coating of the writing pen is missing, determining that the writing pen passes the appearance inspection.

[0082] Optionally, the execution subject performs pairwise matching on the writing pen projection images in the writing pen projection image group to obtain matching information, and may further include the following steps:

[0083] In the first step, two writing pen projection images that have not been matched with each other are selected from the writing pen projection images in the writing pen projection image group as the target writing pen projection image and the reference writing pen projection image, and the following matching sub-steps are performed using the target writing pen projection image and the reference writing pen projection image:

[0084] The first matching sub-step is to select a grid area from the edge of the target writing pen projection image as a target grid area, wherein the target grid area may be in a square shape.

[0085] In the second matching sub-step, grid areas are sequentially selected from the reference writing pen projection image as reference grid areas to obtain a reference grid area set, wherein there are no gaps or overlaps between the reference grid areas in the reference grid area set.

[0086] The third matching sub-step is to determine the average value of each color value in the target grid area and each reference grid area in the reference grid area set.

[0087] In the fourth matching sub-step, a reference grid area having the smallest sum of the squares of the average values ​​of the respective color values ​​and the average value of the color value of the target grid area is selected from the reference grid area set as a preliminary matching reference grid.

[0088] In a fifth matching sub-step, the sum of the squares of the average color value of the preliminary matching reference grid area and the average color value of the target grid area is determined as a reference average value.

[0089] In a sixth matching sub-step, in response to determining that the reference average value is less than or equal to a preset threshold, the center point coordinates of the preliminary matching reference grid area and the target grid area are added to the matching information as a matching coordinate pair.

[0090] The above steps, as an inventive point of an embodiment of the present disclosure, solve the second technical problem mentioned in the background technology: "At present, when producing writing pens, defective writing pens are often removed from the production line by manual visual inspection. This method has high labor costs, is time-consuming and labor-intensive, and is prone to omissions." The factors that lead to the above technical problems are often as follows: At present, when producing writing pens, defective writing pens are often removed from the production line by manual visual inspection. If the above factors are solved, the efficiency of removing defective writing pens can be improved. In order to achieve this effect, the present disclosure introduces a camera and a rolling device. The rolling device is used to rotate the writing pen on the conveyor belt, and the camera is controlled to take a picture of the writing pen after each rotation to obtain a writing pen image group. Then, the writing pen images in the writing pen image group are cropped, projected, matched and spliced ​​to obtain a planar unfolded image of the writing pen surface. Therefore, by detecting the memory image of the spliced ​​image of the writing pen, it is possible to accurately determine whether the mark on the writing pen is skewed or missing and whether the coating of the writing pen is missing, so that the defective writing pen can be eliminated.

[0091] The various embodiments disclosed above have the following beneficial effects: Plastic-coated writing pens produced by the plastic-coated writing pen production apparatus of some embodiments of the present disclosure can improve user comfort and safety during use. Specifically, the reason why related writing pens suffer from poor user comfort and low safety during use is that wooden writing pens are relatively hard, and long-term use can easily cause calluses on the user's hands. Furthermore, the paint coating on the outer layer of the writing pen often falls off easily, and if accidentally ingested by children, it may be harmful to their health. Based on this, the production of plastic-coated writing pens in some embodiments of the present disclosure includes a writing pen conveyor device, a coating device, a baking device, a cooling device, and a controller. The writing pen conveyor device includes an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt, and a coated writing pen conveyor belt. The uncoated writing pen conveyor belt and the primer-coated writing pen conveyor belt are aligned and connected, and the molten plastic-coated writing pen conveyor belt and the coated writing pen conveyor belt are aligned and connected. The coating device includes a primer coating device and a molten plastic coating device. The primer coating device is disposed above the uncoated writing pen conveyor, and the molten plastic coating device is located between the baking device and the cooling device. The baking device is configured to dry the writing pens coated with the primer coating, and the primer-coated writing pen conveyor belt passes through the baking device. The cooling device is configured to cool the writing pens coated with the molten plastic coating, and the molten plastic-coated writing pen conveyor belt passes through the cooling device. The writing pen conveyor, the coating device, the baking device, the cooling device, and the controller are communicatively connected. The controller is configured to perform the following steps: controlling the primer coating device to apply primer to the writing pens on the uncoated writing pen conveyor belt. Controlling the baking device to dry the coating on the writing pens on the primer-coated writing pen conveyor belt. Thus, by spraying a layer of primer on the unprocessed writing pens, the surface of the writing pens is more susceptible to subsequent adhesion of molten plastic. The molten plastic coating device is controlled to coat the writing pens after the coating drying process with molten plastic, and the pens after the molten plastic coating process are moved to the molten plastic coated writing pen conveyor. The cooling device is controlled to cool the coating on the writing pens on the molten plastic coated writing pen conveyor. The cooling process cools and solidifies the molten plastic coating on the surface of the writing pens. The coated writing pen conveyor is controlled to transport the cooled writing pens. Thus, by adding a layer of plastic to the untreated surface of the writing pen and performing injection molding, the exterior of the writing pen can be completely encapsulated.Because plastic itself has the soft property, it not only improves the feel when holding, but also further enhances the comfort and safety of users due to its environmentally friendly and non-toxic properties.

[0092] The above description is only an illustration of some preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A plastic-coated writing pen preparation device, comprising a writing pen conveying device, a coating device, a baking device, a cooling device and a controller, wherein: The writing pen conveying device includes an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt, and a coated writing pen conveyor belt, wherein the uncoated writing pen conveyor belt and the primer-coated writing pen conveyor belt are aligned and connected, and the molten plastic-coated writing pen conveyor belt and the coated writing pen conveyor belt are aligned and connected; The coating device includes a primer coating device and a molten plastic coating device, the primer coating device is arranged above the uncoated writing pen conveyor belt, and the molten plastic coating device is located between the baking device and the cooling device; The baking device is configured to dry writing pens coated with a primer coating, and the primer-coated writing pen conveyor belt passes through the baking device; The cooling device is configured to cool writing pens coated with a molten plastic coating, and the molten plastic coating writing pen conveyor belt passes through the cooling device; The writing pen transport device, the coating device, the baking device, the cooling device and the controller are communicatively connected, and the controller is configured to perform the following steps: controlling the primer coating device to perform a primer spraying operation on the writing pens on the uncoated writing pen conveyor belt; controlling the baking device to perform a coating drying process on the writing pens on the primer-coated writing pen conveyor belt; The molten plastic coating device is controlled to perform a molten plastic coating process on the writing pen after the coating drying process, and the writing pen after the molten plastic coating process is moved to the molten plastic coating writing pen conveyor belt, wherein the plastic coating writing pen preparation equipment further includes a molten plastic transmission device, the molten plastic transmission device includes a molten plastic transmission pipeline and pipeline insulation material, the molten plastic coating device includes a spray track and a spray gun, the spray track is aligned and connected with the primer coating writing pen conveyor belt and the molten plastic coating conveyor belt respectively, the spray gun is suspended above the molten plastic transmission device, and the spray gun is threadedly connected to the molten plastic transmission pipeline; the spray gun is controlled to perform a molten plastic spraying operation on the writing pen on the spray track; controlling the cooling device to perform coating cooling on the writing pens on the molten plastic coating writing pen conveyor belt; controlling the coated writing pen conveyor belt to transport the cooled writing pen; The plastic-coated writing pen preparation device further includes a marking spraying device, which includes a writing pen holder and a marking sprayer; The following steps are performed: first, controlling the writing pen holder to grab and fix the writing pen on the coated writing pen conveyor belt; second, controlling the marking spraying device to perform a marking spraying operation on the fixed writing pen; and third, controlling the writing pen holder to perform a fixing release operation after performing the marking spraying operation; The plastic-coated writing pen preparation equipment further includes a defective product rejection device, which includes a camera and a rolling device. The camera is mounted directly above the coated writing pen conveyor belt, and the rolling device is mounted on the coated writing pen conveyor belt directly below the camera. The rolling device rotates the writing pens on the coated writing pen conveyor belt at an angle of 150 degrees each time, ensuring that there are overlapping portions between the images taken by the camera of the writing pens, facilitating subsequent matching and splicing of the images. Perform the following steps: the first step is to control the rolling device to rotate the writing pen three times in sequence; the second step is to control the camera to take a picture of the writing pen after each rotation to obtain a writing pen image group; the third step is to crop the writing pen area in each writing pen image in the writing pen image group to obtain a cropped area image group; the fourth step is to perform plane projection processing on each cropped area image in the cropped area image group to obtain a writing pen projection image group, wherein each cropped area image in the cropped area image group is plane projected by using perspective change or affine transformation; the fifth step is to perform plane projection processing on the writing pen projection images in the writing pen projection image group. Perform pairwise matching to obtain matching information. In the sixth step, based on the matching information, perform stitching processing on the writing pen projection images in the writing pen projection image group to obtain a writing pen stitched image. In the seventh step, determine whether the marking on the writing pen is skewed or missing and whether the coating of the writing pen is missing based on the writing pen stitched image. In the eighth step, in response to determining that the marking on the writing pen is not skewed or missing and the coating of the writing pen is not missing, determine that the writing pen passes the appearance inspection. In the ninth step, in response to determining that the marking on the writing pen is skewed or missing or the coating of the writing pen is missing, determine that the writing pen passes the appearance inspection. Wherein, performing pairwise matching on the writing pen projection images in the writing pen projection image group to obtain matching information includes the following steps: a first step, selecting two writing pen projection images that have not been matched with each other from the writing pen projection images in the writing pen projection image group as target writing pen projection images and reference writing pen projection images, and performing the following matching sub-steps using the target writing pen projection images and the reference writing pen projection images: a first matching sub-step, selecting a grid area from the edge of the target writing pen projection image as a target grid area, wherein the shape of the target grid area is a square; a second matching sub-step, selecting grid areas in the reference writing pen projection image in sequence as reference grid areas to obtain a reference grid area set, wherein the reference grid There are no gaps or overlapping parts between the reference grid areas in the area set. The third matching sub-step determines the average value of each color value in the target grid area and each reference grid area in the reference grid area set. The fourth matching sub-step selects a reference grid area from the reference grid area set with the smallest sum of the average values ​​of each color value and the square of the average value of the color value of the target grid area as a preliminary matching reference grid. The fifth matching sub-step determines the sum of the square of the average value of the color value of the preliminary matching reference grid area and the average value of the color value of the target grid area as a reference average value. The sixth matching sub-step, in response to determining that the reference average value is less than or equal to a preset threshold, adds the center point coordinates of the preliminary matching reference grid area and the target grid area as a matching coordinate pair to the matching information.

2. The apparatus for preparing a plastic-coated writing pen according to claim 1, wherein: The equipment for preparing plastic-coated writing pens also includes a heating device, which includes a heating container. The heating container has a solid plastic feed port, a color paste feed port and a molten plastic discharge port. The pipeline insulation material is wrapped around the outside of the molten plastic transmission pipeline, and the molten plastic transmission pipeline is threadedly connected to the molten plastic discharge port.

3. The apparatus for preparing a plastic-coated writing pen according to claim 2, wherein: The controller is further configured to perform the following steps: The heating container in the heating device is controlled to heat and stir the solid plastic and the color paste delivered by the solid plastic feed port and the color paste feed port, and to output the stirred molten plastic through the molten plastic discharge port.

4. The apparatus for preparing a plastic-coated writing pen according to claim 3, wherein: The molten plastic coating device includes a dipping container, a lifting hollow plate and a grabbing device. The lifting hollow plate is connected to the bottom of the dipping container via an electric push rod. The lifting hollow plate can move up and down in the dipping container. The dipping container is threadedly connected to the molten plastic conveying device. The dipping container is used to hold the molten plastic conveyed by the molten plastic conveying device. The controller controls the molten plastic coating device to perform a molten plastic coating process on the writing pen after the coating drying process, and moves the writing pen after the molten plastic coating process onto the molten plastic coating writing pen conveyor belt by executing the following steps: Controlling the gripping device to move the writing pens on the primer-coated writing pen conveyor belt that have been subjected to coating drying treatment into the dipping container; Controlling the lifting hollow disk in the dipping container to lift the writing pen in the dipping container upward and away from the molten plastic in the dipping container; The grabbing device is controlled to move the writing pen on the lifting hollow disk to the molten plastic coating writing pen conveyor belt.

5. The apparatus for preparing a plastic-coated writing pen according to claim 3, wherein: The molten plastic coating device includes a push-pull device and a pumping device, the pumping device includes a coating trough, a pumping hole inlet and a pumping hole outlet, the pumping hole inlet and the pumping hole outlet are respectively located at the two ends of the coating trough, the pumping hole outlet is configured with a rubber leather ring, the rubber leather ring is sleeve-connected to the pumping hole outlet, a feed opening is provided above the coating trough, the molten plastic transmission device is threadedly connected to the feed opening above the coating trough, the coating trough is used to hold molten plastic, and the length of the pumping device is less than the length of a writing pen; The controller controls the molten plastic coating device to perform a molten plastic coating process on the writing pen after the coating drying process, and moves the writing pen after the molten plastic coating process onto the molten plastic coating writing pen conveyor belt by executing the following steps: Controlling the push-pull device to push the writing pen on the primer coating writing pen conveyor belt that has been subjected to coating drying treatment from the extraction hole entrance into the coating tank; The push-pull device is controlled to pull the writing pen from the outlet of the extraction hole and move the writing pen onto the molten plastic coating writing pen conveyor belt.

6. The apparatus for preparing a plastic-coated writing pen according to claim 5, wherein: The defective product rejection device is communicatively connected to the controller, and further includes a first laser distance measuring sensor, a second laser distance measuring sensor, a laser signal processor, and a robotic arm. The first laser distance measuring sensor and the second laser distance measuring sensor are respectively mounted on both sides of the coated writing pen conveyor belt, the first laser distance measuring sensor and the second laser distance measuring sensor are directly opposite to each other, and the distance between the first laser distance measuring sensor and the second laser distance measuring sensor is a fixed value. The robotic arm is disposed on either side of the coated writing pen conveyor belt. The defective product rejection device is configured to perform the following steps: In response to determining that the writing pens on the coated writing pen conveyor belt pass through the first laser distance measuring sensor and the second laser distance measuring sensor, performing laser measurement processing on the writing pens on the coated writing pen conveyor belt by the first laser distance measuring sensor and the second laser distance measuring sensor to obtain measurement data; processing the measurement data by the laser signal processor to obtain a writing pen length recognition result; in response to determining that the writing pen length recognition result meets a rejection condition, sending the writing pen length recognition result to the controller; According to the received writing pen length recognition result, the robotic arm is controlled to perform a grasping operation corresponding to the writing pen length recognition result.

7. A method for preparing a plastic-coated writing pen, applied to the apparatus for preparing a plastic-coated writing pen according to any one of claims 1 to 6, wherein: The apparatus for preparing a plastic-coated writing pen includes a writing pen conveying device, a coating device, a baking device, a cooling device, and a controller. The writing pen conveying device includes an uncoated writing pen conveyor belt, a primer-coated writing pen conveyor belt, a molten plastic-coated writing pen conveyor belt, and a coated writing pen conveyor belt. The coating device includes a primer coating device and a molten plastic coating device. The method includes: controlling the primer coating device to perform a primer spraying operation on the writing pens on the uncoated writing pen conveyor belt; controlling the baking device to perform a coating drying process on the writing pens on the primer-coated writing pen conveyor belt; controlling the molten plastic coating device to perform a molten plastic coating process on the writing pen after the coating drying process, and moving the writing pen after the molten plastic coating process onto the molten plastic coating writing pen conveyor belt; controlling the cooling device to perform coating cooling on the writing pens on the molten plastic coating writing pen conveyor belt; The coated writing pen conveyor belt is controlled to transport the cooled writing pen.

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