CN210657178U

CN210657178U - Coating system for container

Info

Publication number: CN210657178U
Application number: CN201920329869.9U
Authority: CN
Inventors: 姚谷; 李柘林; 保秦臻
Original assignee: China International Marine Containers Group Co Ltd; Guangdong Xinhui CIMC Special Transportation Equipment Co Ltd; CIMC Containers Holding Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; Guangdong Xinhui CIMC Special Transportation Equipment Co Ltd; CIMC Container Group Co Ltd
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-06-02
Anticipated expiration: 2029-03-14

Abstract

The utility model provides a coating system of a container, which comprises a conversion coating generation device used for generating a conversion coating for the container; the electrophoretic coating equipment is used for carrying out electrophoretic coating on the container; a plurality of surface cleaning devices for surface cleaning the container before and after the conversion coating is formed and before and after the electrodeposition coating, wherein each surface cleaning device is arranged according to the processing time required for the conversion coating formation and the electrodeposition coating; and the plurality of surface cleaning apparatuses include a degreasing apparatus and a pre-degreasing apparatus provided in a degreasing compounding station formed as a compounding station. The coating system can process a plurality of containers by adopting a continuous coating process. A plurality of containers can simultaneously and respectively enter different coating stations to carry out different coating steps. Thus, the operation of the coating production line of the container can be more efficiently and continuously, and the manufacturing cost of the coating production line is reduced.

Description

Coating system for container

Technical Field

The utility model relates to a container technical field, and more specifically relate to a coating system of container.

Background

The currently used electrophoretic coating process is mainly divided into two types according to different transportation forms:

the first is a continuous production mode for hoisting workpieces by adopting a closed annular conveying chain, and is suitable for electrophoretic coating of smaller workpieces, such as household appliances and accessories thereof, small automobiles and accessories thereof and the like.

The second is an intermittent production form that workpieces are lifted one by using a crown block or a travelling crane, and is suitable for larger workpieces, such as the body of a motor coach, the body of a truck or a skeleton vehicle and the like.

In order to meet the increasingly strict environmental regulations, it is imperative to introduce more environmentally friendly electrophoretic coating technology in the container industry to replace the traditional paint or water-based paint coating technology. Due to the large overall size of the container, the electrophoretic coating process adopting the intermittent production mode is generally considered to be preferred. However, the steps of the pre-electrophoretic treatment and the post-electrophoretic cleaning in the electrophoretic coating process are usually performed by dipping, and the requirements of container production cannot be met well. The specific reasons are as follows:

one) the whole container is the semi-enclosed structure, only has bottom and door end (when the door is in the open mode) can exhaust, when adopting the dipping mode to carry out electrophoresis pretreatment and when washing after the electrophoresis, when the whole container only with the roof up state (traditional container production technology) dip in the in-process of groove liquid, only has the door end exhaust, leads to the whole container to go into the groove relatively difficult and go into the groove speed slower, influences production efficiency. On the other hand, as a large amount of gas can be hidden in the blind waves of the door lintel and the box top and cannot be exhausted, the corresponding steps of treatment cannot be finished in the box top.

Secondly), each step in the pre-electrophoresis treatment step and the post-electrophoresis cleaning step in the traditional intermittent production form is an independent station, namely, each step is provided with a groove body, and in the actual production process, the process treatment time of each step is often obviously different and the coordinated production is difficult; meanwhile, when the size of the processed workpiece is large (such as the whole container of a container), the tank body occupies a large area, the process layout of one tank body in each step occupies a large amount of workshop sites, and the process layout design is often limited by actual site conditions to bring certain difficulty to reasonable layout.

Thirdly) because the steps in the pre-electrophoresis treatment step and the post-electrophoresis cleaning step are more, in order to save investment, the number of lifting equipment among the steps is often less than that of the steps, synchronous lifting cannot be realized, only when the container in the step is moved out, the next container to be processed can be lifted to the current step, so that the front step and the rear step are mutually waited, a large amount of time is wasted, and the production efficiency is lower.

Accordingly, there is a need for a container painting system that at least partially addresses the problems of the prior art.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

In order to at least partially solve the above problems, according to an aspect of the present invention, there is provided a coating system for a container, including:

the conversion film generating equipment is used for generating the conversion film for the container;

the electrophoretic coating equipment is used for carrying out electrophoretic coating on the container; and

a plurality of surface cleaning devices for surface cleaning the container before and after the conversion coating is formed and before and after the electrodeposition coating,

arranging each surface cleaning device according to the processing time required by the conversion film generation and the electrophoretic coating to form an independent station or a composite station for surface cleaning, so that the coating system can process a plurality of containers at the same time; and is

The plurality of surface cleaning apparatuses include a degreasing apparatus and a pre-degreasing apparatus located upstream of the conversion-film formation apparatus, the degreasing apparatus and the pre-degreasing apparatus being provided in a degreasing compounding station formed as the compounding station.

According to this scheme for the application system of container can adopt continuous type application technology to carry out the application of electrophoresis lacquer to a plurality of containers. A plurality of containers can enter the production line in sequence according to the sequence of arranging to simultaneously respectively enter different coating stations, carry out different coating steps. Thus, the operation of the coating production line of the container can be more efficiently and continuously, and the manufacturing cost of the coating production line is reduced. And the pre-degreasing treatment and the degreasing treatment can be carried out in sequence at one station.

In addition, for current coating process, the utility model provides a quantity that the application station set up is less, has reduced the quantity of station effectively. Therefore, the occupied area of the station can be effectively reduced, and the investment cost is saved.

Preferably, the conversion coating generation equipment is arranged at a conversion coating generation station;

each of the at least one electrophoretic coating device is arranged at a respective electrophoretic coating station;

each of the plurality of surface cleaning apparatuses is provided individually or compositely at a plurality of surface cleaning stations, which are the individual stations or the composite station.

Preferably, a plurality of said containers exit from a current station simultaneously and enter a next station simultaneously.

Preferably, the same container enters one of at least two electrocoating stations, and different containers enter different electrocoating stations one after the other, or

And the same container sequentially enters each of at least two electrophoretic coating stations.

Preferably, the preceding container from the preceding station enters one of the two electrocoating stations first, the succeeding container from the preceding station enters the other of the two electrocoating stations again, or

The container from the previous station enters each of the two electrocoating stations in turn.

Preferably, the number of the electrophoretic coating stations is an even number, the same container sequentially enters each of a group of the electrophoretic coating stations, different containers sequentially enter different groups of the electrophoretic coating stations, and the number of the electrophoretic coating stations in each group is the same.

Preferably, the surface cleaning apparatus is provided at the independent station to perform surface cleaning of the container using a cleaning liquid, and

at least two of the plurality of surface cleaning devices are disposed at the compounding station for performing at least two stages of surface cleaning of the container with a cleaning fluid.

Preferably, the plurality of surface cleaning apparatuses includes a pre-conversion-film washing apparatus located upstream of the conversion-film formation apparatus, and the plurality of surface cleaning stations includes a pre-conversion-film washing station formed as the composite station.

Preferably, the plurality of surface cleaning apparatuses includes a pre-electrophoretic water cleaning apparatus located downstream of the conversion coating generation apparatus and upstream of the electrocoating apparatus, and the plurality of surface cleaning stations includes a pre-electrophoretic water cleaning station formed as the compounding station.

Preferably, the plurality of surface cleaning apparatuses includes a first post-electrophoresis water cleaning apparatus and a second post-electrophoresis water cleaning apparatus located downstream of the electrophoretic coating apparatus, and the plurality of surface cleaning stations includes a first post-electrophoresis water cleaning station formed as the composite station and a second post-electrophoresis water cleaning station formed as the independent station.

Preferably, the first post-electrophoresis washing station is provided with two surface cleaning devices to perform two-stage surface cleaning on the container, or

And the first post-electrophoresis washing station is provided with three surface cleaning devices to carry out three-level surface cleaning on the container.

Preferably, each of the pre-conversion-film washing station and the pre-electrophoresis washing station is provided with three surface cleaning devices to perform three-stage surface cleaning on the container, or

And each of the conversion film front water washing station and the electrophoresis front water washing station is provided with two surface cleaning devices.

Preferably, the surface cleaning apparatus comprises one of a spraying device and a soaking device to perform the surface cleaning on the container in a spraying or soaking manner, or

The surface cleaning equipment comprises a spraying device and a soaking device, wherein the spraying device and the soaking device are respectively arranged in different surface cleaning stations, so that the container is subjected to surface cleaning in a spraying and soaking mode.

Preferably, in the compound station, the surface cleaning equipment further comprises at least two storage pools for supplying cleaning liquid, and the cleaning liquid after cleaning is respectively collected to the respective storage pools to be continuously used as the cleaning liquid.

Preferably, in the same compound station, an overflow pipeline is arranged between adjacent storage pools of the at least two storage pools, so that the cleaning liquid in a lower storage pool defined according to the cleaning sequence overflows to an upper storage pool adjacent to the lower storage pool.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic structural view of a coating line according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a pre-conversion-film water washing device according to a preferred embodiment of the present invention; and

fig. 3 is a schematic structural view of a composite degreasing device according to a preferred embodiment of the present invention.

Description of the reference numerals

121: a degreasing station 122: water washing station before conversion coating

123: conversion film formation station 124: water washing station before electrophoresis

125: first electrocoating station 126: second electrophoretic coating station

127: first post-electrophoresis washing station 128: second post-electrophoresis washing station

130: the hoisting and conveying device 140: composite degreasing equipment

11. 12, 13, 14, 15, 16, 17, 18: container, especially container for transporting goods

150: pre-conversion film washing equipment 151: spraying device

152: first reservoir 153: the second storage pool

154: third storage tank 155: collecting pool

156: waterway switching device 157: first pump

158: second pump 159: third pump

160: the check valve 161: control system

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

It is to be understood that the terms "a," "an," and "the" as used herein are intended to describe specific embodiments only and are not to be taken as limiting the invention, which is intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for illustrative purposes only and are not limiting.

Ordinal words such as "first" and "second" are referred to in this application as labels only, and do not have any other meanings, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

In the following, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the invention and do not limit the invention.

According to the preferred embodiment of the present invention, a method for coating a container is provided, which employs an electrophoretic coating process to coat a container with an electrophoretic paint. The coating method roughly comprises a conversion coating generation step, an electrophoretic coating step and a surface cleaning step.

Specifically, the conversion coating generation step is used for generating a specific conversion coating on the surface of the container steel. And in the electrophoretic coating step, electrophoretic paint is used for carrying out overall dip-coating on the container so as to form an electrophoretic paint coating on the surface of the container with the conversion coating. The surface cleaning step is provided before and after the conversion coating generating step and before and after the electrophoretic coating step to perform surface cleaning on the container to remove surface impurities such as oil stains, residual liquid, dust and the like. According to the utility model discloses a container is the container that uses usually, and it generally includes front end, door end, roof, left side wall, right side wall and chassis.

According to another aspect of the present preferred embodiment, there is provided a coating system for a container, which includes a conversion coating generating apparatus, an electrocoating apparatus, and a plurality of surface cleaning apparatuses. The conversion coating generation equipment is arranged at the conversion coating generation station so as to carry out the conversion coating generation step on the container. The electrophoretic coating equipment is arranged at an electrophoretic coating station to carry out an electrophoretic coating step on the container. Each of the plurality of surface cleaning apparatuses is provided individually or in combination at a plurality of surface cleaning stations to perform a surface cleaning step on the container before and after the conversion coating generation step and before and after the electrodeposition coating step, respectively.

In order to make can adopt continuous type coating process to carry out the application of electrophoresis lacquer to a plurality of containers, the utility model discloses each station that is used for realizing each step to the aforesaid carries out reasonable arranging for each station forms to independent station or compound station. In this way two or more devices with substantially the same function can be arranged in a compound manner in one station, i.e. formed as a compound station. At least two processing steps can be performed in the compounding station, effectively reducing the number of stations. In this context, the term "independent station" refers to a station capable of performing one process step, and "compound station" refers to a station capable of performing at least two process steps.

Preferably, the utility model discloses according to the required processing time of conversion coating generation step and electrophoresis application step to carry out reasonable arranging to the surface cleaning step to it is independent station or compound station to form to be used for a plurality of surface cleaning stations. Each of the plurality of surface cleaning apparatuses is provided individually or compositely at a plurality of surface cleaning stations, which are independent stations or composite stations, so that two or more surface cleaning apparatuses having substantially the same function can be compositely provided at one surface cleaning station, i.e., formed as a composite station, according to the above-described processing time. At least two surface cleaning steps can be performed on the container in the compound station by using the cleaning liquid, so that the number of surface cleaning stations can be effectively reduced.

The surface cleaning step and the conversion film forming step according to the present preferred embodiment preferably perform the treatment step on the container by spraying the entire container. The surface cleaning apparatus and the conversion film forming apparatus are configured to spray the container in its entirety. The electrocoating step preferably employs a treatment step of dip-coating the container as a whole. The electrodeposition coating apparatus is configured to dip-coat the container entirely with an electrodeposition paint to form an electrodeposition paint coating on the surface of the container.

Further, the surface cleaning step before the conversion coating generation step substantially includes the following sequential steps:

and the pre-degreasing step is used for primarily removing impurities such as oil stains on the surface of the container.

And a degreasing step for further removing impurities such as oil stains on the surface of the container.

And a water washing step before film conversion, which is used for removing the degreasing fluid remained on the surface of the container.

Specifically, the pre-degreasing step is carried out in a surface cleaning station, and pre-degreasing equipment is adopted to remove impurities such as surface oil stains and the like on the container. Pre-degreasing equipment belongs to surface cleaning equipment.

The degreasing step is carried out in a surface cleaning station, and degreasing equipment is adopted to remove impurities such as surface oil stains and the like on the container. Degreasing equipment belongs to surface cleaning equipment.

The pre-degreasing apparatus and the degreasing apparatus are provided in a degreasing station formed as a composite station, and are formed by two surface cleaning apparatuses being compositely provided. The degreasing step may be performed first in a degreasing station, which belongs to one of the surface cleaning stations, and then in a degreasing step.

The step of washing before the conversion film is carried out in a surface cleaning station, and the container is subjected to removal of impurities such as degreasing fluid by adopting washing equipment before the conversion film. The water washing equipment before the conversion coating belongs to surface cleaning equipment and is formed by compositely arranging three surface cleaning equipment. And the conversion film front washing equipment is arranged at a conversion film front washing station so as to carry out the conversion film front washing step at the conversion film front washing station, and the conversion film front washing station belongs to one of the surface washing stations. And the water washing device before the conversion film is positioned at the downstream of the degreasing device so as to carry out water washing treatment before the conversion film after the degreasing treatment.

Preferably, the conversion film front washing station is formed as a composite station, and three of the plurality of surface cleaning devices are arranged at the conversion film front washing station to perform three-stage surface cleaning on the container. The containers can simultaneously and respectively enter the degreasing station and the pre-conversion film washing station, so that pre-degreasing treatment and degreasing treatment are carried out, and pre-conversion film washing treatment is carried out at the same time. And simultaneously quitting the degreasing station and the pre-conversion film washing station, so that the production beats of the container at the two stations are approximately the same or balanced. In addition, in the present context, "simultaneously" means substantially simultaneously, that is, there may be a certain time difference.

It will be understood that each station may accommodate one container, and that a plurality of containers as defined herein means a plurality of containers handled in a finishing line.

Further, the conversion coating generating step treats the surface of the container with one or at least two of phosphating, vitrification, zirconizing, silanization, and anodic protection coating to form a specific conversion coating. The conversion coating can cover and protect the surface of the steel material of the container, improve the corrosion resistance of the container, and improve the adhesive force between the electrophoretic paint and the surface of the container. The conversion film may be a phosphating film formed by a phosphating process. Alternatively, the conversion coating may be a nanoceramic conversion coating formed using a nanoceramic process. Alternatively, the conversion film may be a polymeric passivation film formed by reacting an aqueous conductive polymer material with a steel material of the container, or the conversion film may be a zirconium film or a silanized film formed by zirconium treatment or silanization treatment.

The utility model discloses a conversion coating generates step is one of key step in all steps, can influence the container performance. Thus, the present preferred embodiment takes the processing time required for the conversion coating film formation step as a factor for adjusting the stations of the coating line. That is, the processing time of the conversion coating generation station is a factor in adjusting the station arrangement. Each of the plurality of surface cleaning stations may be selectively formed as an independent station or a composite station depending on the processing time of the conversion film forming station. In the case of a compound station, at least two surface cleaning steps may be performed.

The conversion film forming device is positioned at the downstream of the pre-conversion film water washing device so as to carry out the conversion film forming step after the pre-conversion film water washing treatment. Preferably, the conversion film forming station is formed as a separate station.

Further, the surface cleaning step further comprises a pre-electrophoresis water washing step after the conversion coating generation step and before the electrophoresis coating step, wherein the pre-electrophoresis water washing step is used for removing residual liquid materials for generating the conversion coating on the surface of the container. The liquid material can be phosphating solution, vitrification solution, aqueous conductive polymer material, or treatment solution such as zirconium solution, silanization solution, etc.

The pre-electrophoresis washing step is carried out in a surface cleaning station, and liquid materials are removed from the container by adopting pre-electrophoresis washing equipment. The water washing device before electrophoresis belongs to a surface cleaning device and is formed by compositely arranging three surface cleaning devices. The pre-electrophoresis washing device is arranged on a pre-electrophoresis washing station to carry out a pre-electrophoresis washing step on the pre-electrophoresis washing station, and the pre-electrophoresis washing station belongs to one of the surface washing stations. The pre-electrophoresis water washing device is located downstream of the conversion film formation device to perform pre-electrophoresis water washing treatment after the conversion film formation.

Preferably, the pre-electrophoresis water washing station is formed as a composite station, and three of the plurality of surface cleaning devices are disposed at the pre-electrophoresis water washing station to perform three-stage surface cleaning on the container.

Further, the utility model discloses an electrophoresis application step is key step two in all steps, can influence the container performance. Thus, the preferred embodiment uses the processing time required for the electrocoating step as a factor in adjusting the stations of the coating line. That is, the processing time of the electrocoating station is another adjusting factor for the station arrangement. Each of the plurality of surface cleaning stations may be selectively formed as an independent station or a compound station according to a processing time of the electrocoating station. In the case of a compound station, at least two surface cleaning steps may be performed.

The electrophoretic coating device is positioned at the downstream of the pre-electrophoretic washing device so as to carry out electrophoretic coating after the pre-electrophoretic washing treatment. The electrocoating station is formed as an independent station. Alternatively, according to this embodiment, the electrocoating step may be performed in at least one (e.g., one, two, or three) separate electrocoating stations, in which embodiment the same container is electrocoated at least once. In embodiments of at least two electrocoating stations, the at least two electrocoating stations may have approximately the same processing time as each other. Each of the plurality of surface cleaning stations may be selectively formed as an independent station or a compound station according to a processing time of one of the at least one electrocoating station.

Specifically, in at least two electrocoating stations, for example, one embodiment is that the same container can enter one electrocoating station to perform electrocoating only once, and different containers sequentially enter different electrocoating stations. In this case, the processing time of each electrocoating station is approximately a multiple of the processing time of the other stations. For example, the coating line may include two electrocoating stations, where a first container from a previous station enters one of the two electrocoating stations, a second container from the previous station enters the other of the two electrocoating stations, and the two electrocoated containers enter the next station directly. In this case, the processing time of each electrocoating station is approximately 2 times the processing time of the other stations.

Another embodiment is that the same container can be brought into each of at least two of said electrocoating stations in turn for at least two electrocoating operations, in which case the processing time of each electrocoating station can be about the same as the processing time of the other stations. For example, a coating line includes two electrocoating stations, and the same container may enter the two electrocoating stations in sequence to perform two electrocoating operations.

Yet another example is that the number of electrocoating stations may be even, specifically an even number greater than 4. Each group of electrophoretic coating stations has the same number and comprises at least two electrophoretic coating stations. The same container can enter each of a group of electrocoating stations in turn, and different containers enter different groups of electrocoating stations in turn. In this case, the processing time of each electrocoating station is approximately a multiple of the processing time of the other stations. For example, the coating line may include four electrocoating stations, one set of two electrocoating stations. The former container from the previous station enters each of one group of electrophoretic coating stations in turn, and the latter container from the previous station enters each of the other group of electrophoretic coating stations in turn.

In addition, as to the mode that the container enters the electrophoretic coating station, except the mode described above, any other mode that can be realized is within the protection scope of the present invention.

It will be understood that the above "same" refers to the same container entering each station in the sequence of the coating process.

Preferably, the present embodiment may include two-stage electrocoating steps, and two electrocoating stations.

Further, the surface cleaning step further comprises a first post-electrophoresis washing step and a second post-electrophoresis washing step after the electrophoresis coating step, and is used for removing the electrophoretic paint remained on the surface of the container.

The first and second post-electrophoresis washing steps are performed in a surface cleaning station, and the first and second post-electrophoresis washing apparatuses are sequentially employed to separately remove the electrophoretic paint from the container. The first post-electrophoresis water washing device belongs to a surface cleaning device and is formed by compositely arranging two surface cleaning devices. The second post-electrophoresis washing apparatus belongs to a surface cleaning apparatus and is formed by separately providing one surface cleaning apparatus. The first and second post-electrophoresis washing devices are respectively arranged on the first post-electrophoresis washing station and the second post-electrophoresis washing station so as to carry out post-electrophoresis washing steps on the two stations, and the first post-electrophoresis washing station and the second post-electrophoresis washing station both belong to surface cleaning stations. The first and second post-electrophoretic washing apparatuses are located downstream of the electrophoretic coating apparatus to perform post-electrophoretic washing treatment after electrophoretic coating.

Preferably, the first post-electrophoresis washing station is formed as a compound station, and two of the plurality of surface cleaning apparatuses are provided in the first post-electrophoresis washing station to perform two-stage surface cleaning of the container. The second post-electrophoresis washing station is formed as an independent station.

The utility model discloses consider that the station too many can increase investment cost, the station can make the application effect of container unsatisfactory too seldom to still consider how to guarantee that the production line can be higher to the application output of container. Therefore, the equipment is arranged according to the preferred embodiment, so that a better station arrangement is formed, and the production efficiency of the whole production line is kept at a higher level.

As shown in fig. 1, according to the coating line of the preferred embodiment, a degreasing station 121, a pre-conversion-film washing station 122, a conversion-film forming station 123, a pre-electrophoretic washing station 124, a first electrophoretic coating station 125, a second electrophoretic coating station 126, a first post-electrophoretic washing station 127, and a second post-electrophoretic washing station 128 are arranged in sequence in the order of coating processes to form stations arranged at intervals along the conveying direction of the container. A plurality of containers 11 to 18 can simultaneously enter the respective stations 121 to 128, respectively, to simultaneously perform the processing steps, and simultaneously exit the respective stations 121 to 128. And the containers 11 to 18 can simultaneously leave from the current station and simultaneously enter the next station, so that the production takts of the containers 11 to 18 at each station 121 to 128 are substantially the same or even.

It should be noted that the directional terms "upper" and "lower" in the "next station" and "previous station" herein are relative to the sequential order of the coating process, not relative to the positional arrangement order of the stations.

For example, container 11 is currently located at the degreasing station 121, container 12 is currently located at the pre-conversion film washing station 122, and container 13 is currently located at the conversion film forming station 123. When the container 11 leaves from the degreasing station 121, the container 12 leaves from the pre-conversion film washing station 122, and the container 13 leaves from the conversion film forming station 123. When the container 11 is conveyed to the pre-conversion-film washing station 122, the container 12 is conveyed to the conversion film formation station 123, and the container 13 is conveyed to the next station (pre-electrophoresis washing station 124). In this manner, containers 14-18 may be similarly transported from the current station to the next station in the manner described above. Therefore, the operation of synchronously hoisting or transferring containers among all processing steps can be realized, and the waiting time and the asynchronous hoisting or transferring time are greatly shortened.

Alternatively, the processing time of each of the plurality of surface cleaning stations (the degreasing station 121, the pre-conversion-film washing station 122, the pre-electrophoresis washing station 124, and the first and second post-electrophoresis washing stations 127 and 128) may not exceed the processing time of the conversion-film forming station 123 or the processing time of each of the

electrophoretic coating stations

125 and 126, and each processing time satisfies the requirements of the coating process of the container. Of course, the processing time of each of the pre-conversion film washing station 122, the pre-electrophoresis washing station 124, and the first and second

post-electrophoresis washing stations

127 and 128, which are formed as the composite stations, may also be set to exceed the processing time of the conversion film formation station 124 or the processing time of each of the

electrocoating stations

125, 126, if needed and/or desired. Alternatively, the processing time of the conversion coating generation station 124 and the processing time of each of the

electrocoating stations

125, 126 are approximately the same.

In an embodiment not shown, the container 15 may be transported to the first electrocoating station 125 and then directly to the first post-electrophoretic wash station 127. The container 16 downstream of the container 15 is transported to the second electrocoating station 126 and then directly to the first post-electrophoretic wash station 127. In this embodiment, the container only enters one electrocoating station. The processing time of the first and

second electrocoating stations

125 and 126 is approximately the same and approximately 2 times the processing time of other stations, such as the conversion film production station 124.

It should be noted that "processing time" includes the time to perform a processing step within a workstation, as well as the time to wait for scheduling and scheduling. Reference herein to "substantially the same" means that there may be some time offset in the set processing time for each station.

A plurality of containers 11 to 18 may be transported via the trolley conveyor 130, one way being when each container 11 to 18 is transported to the respective station: it is possible to use a crane directly vertically into the stations from above each station 121 to 128. The other method is as follows: for the other stations 121 to 125, 127 and 128 except the electrophoretic coating station, the container can be lifted vertically and lowered to the horizontal inlet of each station along the vertical direction, and then moved into the station along the horizontal direction; for the electrophoretic coating station, the container is lifted vertically and moved to the position above the electrophoretic coating station along the horizontal direction, and then is lowered into the station along the vertical direction. In addition, for the other stations 121 to 125, 127 and 128 than the electrocoating station, the containers can be horizontally conveyed into the stations by the floor conveyor.

Preferably, when the container enters other stations except the electrocoating station along the horizontal direction, the door of the container is in an open state, and the door end of the container enters first and the front end enters later.

It should be noted that the transportation mode of the container is an exemplary preferred mode, and the transportation mode of the technical solution of the present invention is within the protection scope of the present invention as long as the transportation mode can be realized.

Further, the pre-conversion-film washing step roughly comprises a first-stage pre-conversion-film washing step, a second-stage pre-conversion-film washing step and a third-stage pre-conversion-film washing step. The three-stage pre-conversion film washing step is realized by pre-conversion film washing equipment.

In one embodiment, the surface cleaning apparatus may include a spray device or a soak device to perform surface cleaning on the container by spraying or soaking. In another embodiment, the surface cleaning apparatus may include a spraying device and a soaking device, which are respectively disposed in different surface cleaning stations. In this embodiment, the container may be surface cleaned by first spraying and then soaking, or first soaking and then spraying, or alternatively spraying and soaking.

For the sake of brevity, the structure of the composite station such as a water washing apparatus before the conversion film is described by taking a spraying device as an example. In other words, the spray unit 151 and the collection tank 155 hereinafter may be replaced with a soaking unit.

In the compound station, the surface cleaning equipment further comprises at least two storage pools for providing cleaning liquid, and the sprayed cleaning liquid is respectively collected to the respective storage pools and continuously used as the cleaning liquid. In the same compound station, an overflow pipeline is arranged between adjacent storage pools in at least two storage pools, so that the cleaning liquid in the lower storage pool defined according to the spraying sequence (namely the cleaning sequence) overflows to the upper storage pool adjacent to the lower storage pool. And finally, discharging the cleaning liquid at the bottom of each stage of storage pool to a waste liquid treatment system.

Specifically, as shown in fig. 2, the pre-conversion coating washing device 150 includes a spraying device 151 to perform three-stage surface washing on the container in a spraying manner.

The pre-conversion-film washing apparatus 150 further includes a first storage tank 152, a second storage tank 153, and a third storage tank 154 for supplying a cleaning liquid (water in the present embodiment), and a collection tank 155 for collecting the sprayed cleaning liquid. The three reservoirs 152 to 154 are in fluid communication with the spray device 151 via pipes to respectively provide cleaning liquid for cleaning the container, and the sprayed cleaning liquid can be collected into the collection reservoir 155 and respectively collected into the respective reservoirs via the waterway switching device 156 to continue to be used as cleaning liquid. That is, the cleaning liquid can be recycled in the water washing device 150 before the conversion coating, so that the raw material cost can be saved, and the method is economical and practical.

The waterway switching device 156 is configured to be capable of communicating with the collecting reservoir 155 and the three storage reservoirs 152 to 154, respectively, and to be capable of delivering the cleaning liquid into the respective storage reservoirs 152 to 154 via the three water flow routes L1 to L3. By the action of the waterway switching device 156, the cleaning liquid in the collection tank 155 can be selectively delivered from one of the three water flow routes L1 to L3.

Specifically, the first-stage cleaning liquid is delivered to the shower device 151 via the first pump 157, and surface cleaning is performed. The sprayed first cleaning liquid is collected in the collecting tank 155, and the first cleaning liquid is delivered into the first storage tank 152 through the water path switching device 156 in pipe communication with the collecting tank 155 and the three storage tanks 152 to 154, forming the first stage water flow path L1.

The second stage cleaning fluid is delivered to the spray device 151 via the second pump 158 for surface cleaning. The sprayed second cleaning liquid is collected in the collection tank 155, and the second cleaning liquid is delivered to the second storage tank 153 through the water path switching device 156, forming a second stage water flow path L2.

The third stage cleaning liquid is sent to the shower device 151 via the third pump 159 to perform surface cleaning. The sprayed third cleaning liquid is collected in the collection tank 155, and the third cleaning liquid is sent to the third storage tank 154 through the water path switching device 156, forming a third stage water flow path L3.

In the pre-conversion-film washing device 150, the three-stage cleaning liquid is sprayed in sequence, and liquid water is used as the cleaning liquid. The water levels of the first stage cleaning solution, the second stage cleaning solution, and the third stage cleaning solution may be the same, different, or partially the same. And when the levels are different, the levels of the three-level cleaning liquid are sequentially increased in sequence according to the spraying sequence. Preferably, tap water is adopted as the first-stage cleaning liquid, and tap water or ultrafiltration water with the conductivity of less than 100 mu s/cm is adopted as the second-stage cleaning liquid and the third-stage cleaning liquid.

The three storage pools 152 to 154 are provided with a first overflow line P1, a second overflow line P2, and a third overflow line P3 in the reverse order of the spraying order to replace a part of the cleaning liquid and maintain the balance and stability of the cleaning liquid in the storage pools 152 to 154.

Specifically, the second reservoir 153 is located at a higher position relative to the first reservoir 152, and the second reservoir 153 is communicated with the first reservoir 152 via a second overflow pipe P2, so that the second-stage cleaning liquid in the second reservoir 153 can be transported into the first reservoir 152 in an overflow manner to replenish the first-stage cleaning liquid. The third reservoir 154 is located at a higher position relative to the second reservoir 153, and the third reservoir 154 is communicated with the second reservoir 153 via a third overflow line P3, so that the third stage cleaning liquid in the third reservoir 154 can be transported into the second reservoir 153 in an overflow manner to replenish the second stage cleaning liquid. The third reservoir 154 is provided with a water inlet line P4 for supplying a cleaning liquid to supplement the third stage cleaning liquid.

Of course, the first storage tank 152 and the second storage tank 153 may be provided with the water inlet line P4 respectively to supply the first cleaning liquid and the second cleaning liquid respectively.

In addition, the first storage tank 152 may be provided with a first overflow line P1 and/or a drain line P5 to drain the first cleaning solution to the sewage treatment system. The second and third reservoirs 153 and 154 may be provided with a drain line P5 for discharging the second and third cleaning solutions to the sewage treatment system.

It should be noted that although other components such as valves are not shown in the drawings, those skilled in the art will understand that other components such as valves may be disposed in the pipeline of the pre-conversion-membrane water washing device according to actual needs.

Preferably, the three cleaning liquids can be supplied to the spray device via respective branch lines, a common line. To prevent contamination by backflow of the cleaning liquid in the common line and/or the branch lines, the branch lines are provided with a one-way valve 160 after the outlet of the pump.

The pre-reforming-membrane water-washing apparatus 150 further includes a control system 161 connected to the first pump 157, the second pump 158, the third pump 159, and the water path switching device 156, respectively. The three pumps 157 to 159 can be automatically controlled simultaneously by the control system 161 to deliver the tertiary cleaning fluids separately in the spray sequence. And the control system 161 can control the waterway switching device 156 to automatically switch the water flow routes L1-L3, so as to realize that the sprayed cleaning liquid is delivered via the corresponding water flow routes and collected into the corresponding storage tanks.

In the present embodiment, the pre-degreasing apparatus and the degreasing apparatus are compositely provided by two surface cleaning apparatuses to form the composite degreasing apparatus 140. The complex degreasing apparatus 140 has substantially the same structure and construction as the above-described pre-reforming-film washing apparatus 150, except that the number of storage tanks and pumps is different. For brevity, the same parts will not be described again.

As shown in fig. 3, the complex degreasing apparatus 140 further includes a first storage tank 142 and a second storage tank 143 for supplying a degreasing fluid (cleaning fluid). Both

reservoirs

142, 143 are in fluid communication with the spray device 141 via respective pipes to separately provide degreasing fluid for cleaning the containers. The degreasing fluid in the collection reservoir 144 may be collected into the respective reservoirs by the flow path switching device 145, and may be used as a cleaning fluid.

The flow path switching device 145 is configured to be able to communicate with the collection tank 144 and the two

storage tanks

142, 143, respectively. The degreasing fluid in the collection bath 144 is selectively supplied from one of the degreasing fluid routes L10 and L20 by the operation of the flow path switching device 145. The pre-degreasing fluid in the first storage tank 142 is delivered to the spraying device 141 via the first pump 146 for surface cleaning. The degreasing fluid in the second storage tank 143 is delivered to the spraying device 141 by the second pump 147 to perform surface cleaning.

The two

storage tanks

142, 143 are provided with a first overflow line P10 and a second overflow line P20 in the reverse order of the spraying order to replace part of the degreasing fluid and to maintain the balance and stability of the degreasing fluid in the

storage tanks

142 and 143. The spent liquor in the second reservoir 143 can be transferred to the first reservoir 142 in an overflow manner. The first storage tank 142 and the second storage tank 143 may each be further provided with a degreasing liquid pipe P40 for supplying a degreasing liquid to supplement the degreasing liquid.

The control system 149 of the complex degreasing apparatus 140 may control the first pump 146 and the second pump 147 to separately deliver the degreasing fluid in a spraying order. The control system 149 can control the flow path switching device 145 to automatically switch the degreasing fluid paths L10 and L20.

Further, the pre-electrophoresis water washing step generally includes a first-stage pre-electrophoresis water washing step, a second-stage pre-electrophoresis water washing step, and a third-stage pre-electrophoresis water washing step. The three-stage pre-electrophoresis washing step is realized by pre-electrophoresis washing equipment.

Preferably, the pre-electrophoresis water washing apparatus is configured substantially the same as the above-described pre-conversion-film water washing apparatus. For the sake of brevity, no further description will be provided herein.

In the water washing equipment before electrophoresis, the three-stage cleaning liquid is sprayed in sequence and all liquid water is used as the cleaning liquid. The water levels of the first stage cleaning solution, the second stage cleaning solution, and the third stage cleaning solution may be the same, different, or partially the same. And when the levels are different, the levels of the three-level cleaning liquid are sequentially increased in sequence according to the spraying sequence. Preferably, tap water or pure water with the conductivity of less than 100 mu s/cm is adopted as the first-stage cleaning solution, ultrafiltration water with the conductivity of less than 100 mu s/cm is adopted as the second-stage cleaning solution, and reverse osmosis water with the conductivity of less than 20 mu s/cm is adopted as the third-stage cleaning solution.

Further, the first post-electrophoresis water washing step roughly includes a first-stage post-electrophoresis water washing step and a second-stage post-electrophoresis water washing step. The two-stage post-electrophoresis washing step is realized by a first post-electrophoresis washing device.

Preferably, the first post-electrophoresis water washing apparatus is configured substantially the same as the above-described pre-conversion-film water washing apparatus. For brevity, the same parts will not be described again here. Except that in the first post-electrophoresis washing device, the container surface is washed by two stages of washing liquids, and thus, the first post-electrophoresis device does not include a third storage tank, a third pump and related pipelines related to the third stage of washing liquids in the pre-conversion-film washing device.

Preferably, in the first post-electrophoresis washing apparatus, the first stage washing liquid and the second stage washing liquid employ ultrafiltration water having an electrical conductivity of less than 100. mu.s/cm.

The second post-electrophoresis washing step may be understood as a third-stage post-electrophoresis washing step, and the second post-electrophoresis washing apparatus includes a third storage tank, a third pump and related pipelines in the pre-conversion-film washing apparatus, which are related to the third-stage cleaning solution, and the third-stage cleaning solution in the third storage tank is transported to the second storage tank in the first post-electrophoresis washing apparatus via an overflow pipeline. That is, the third reservoir, the third pump and the associated lines associated with the third stage cleaning solution are separately provided at the second post-electrophoresis washing station.

Preferably, in the second post-electrophoresis water washing apparatus, the third-stage cleaning solution employs reverse osmosis water having a conductivity of less than 10. mu.s/cm.

Each of the above-described water washing apparatuses (the pre-conversion film water washing apparatus, the pre-electrophoresis water washing apparatus, and the first and second post-electrophoresis water washing apparatuses) may be configured to perform different orders of surface cleaning of the container, if necessary and/or desired, according to actual needs.

For example, in one embodiment, the pre-conversion film washing apparatus and the first post-electrophoresis washing apparatus are configured to enable two-stage surface cleaning of the container. In other words, each of the pre-conversion-film washing station 122 and the pre-electrophoresis washing station 124 is provided with two surface cleaning apparatuses to perform two-stage surface cleaning of the container. In this embodiment, the arrangement order of the stations 121 to 128 is maintained. The degreasing station 121 is a composite station and can perform pre-degreasing treatment and degreasing treatment on the container in sequence. The conversion coating generation station 123 is an independent station and can perform conversion coating treatment on the container. The two

electrocoating stations

125, 126 are independent stations and can electrocoat the container. The first post-electrophoresis washing station 127 is a compound station and can perform two-stage surface cleaning on the container. The second post-electrophoresis washing station is an independent station and can be used for cleaning the surface of the container at one level.

In another embodiment, the first post-electrophoresis washing station may be provided with three surface cleaning devices to perform three stages of surface cleaning of the container. In this embodiment, the second post-electrophoresis water wash station may not be included.

It is understood that the plurality of surface cleaning stations include the degreasing station, the pre-conversion coating washing station, the pre-electrophoresis washing station, and the first and second post-electrophoresis washing stations described above. The plurality of surface cleaning apparatuses include a composite degreasing apparatus, a pre-conversion-film washing apparatus, a pre-electrophoresis washing apparatus, and first and second post-electrophoresis washing apparatuses, which are provided by each of the plurality of surface cleaning apparatuses individually or compositely.

It can be understood that the station that can adopt the mode that the whole case sprayed to carry out the processing step in the production line of the utility model can be replaced by a spraying room.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A paint system for a container, comprising:

The plurality of surface cleaning apparatuses include a degreasing apparatus and a pre-degreasing apparatus located upstream of the conversion-film forming apparatus, the degreasing apparatus and the pre-degreasing apparatus being provided in a degreasing compounding station formed as the compounding station,

each of the at least two electrocoating equipment is arranged at a respective electrocoating station.

2. The coating system of claim 1,

the conversion film generation equipment is arranged at a conversion film generation station;

3. A coating system according to claim 2, wherein a plurality of containers exit from a current station simultaneously and enter a next station simultaneously.

4. A coating system according to claim 3, wherein the same container enters one of at least two electrocoating stations and different containers enter different electrocoating stations one after the other, or

5. The coating system of claim 3,

the preceding container from the previous station enters one of the two electrocoating stations, the succeeding container from the previous station enters the other of the two electrocoating stations, or

6. The coating system of claim 3 wherein the number of electrocoating stations is even, the same container enters each of a set of electrocoating stations in turn, and different containers enter different sets of electrocoating stations in turn, each set having the same number of electrocoating stations.

7. The coating system of claim 1,

the surface cleaning equipment is arranged at the independent station to clean the surface of the container by using cleaning liquid, and

8. The coating system of claim 2 wherein the plurality of surface cleaning apparatuses includes a pre-conversion coating washing apparatus located upstream of the conversion coating generation apparatus, and the plurality of surface cleaning stations includes a pre-conversion coating washing station formed as the compounding station.

9. The coating system of claim 8 wherein the plurality of surface cleaning apparatuses includes a pre-electrocoating water wash apparatus downstream of the conversion coating generation apparatus and upstream of the electrocoating apparatus, and the plurality of surface cleaning stations includes a pre-electrocoating water wash station formed as the compounding station.

10. The coating system of claim 9,

the plurality of surface cleaning apparatuses include a first post-electrophoresis cleaning apparatus and a second post-electrophoresis cleaning apparatus located downstream of the electrophoretic coating apparatus, and the plurality of surface cleaning stations include a first post-electrophoresis cleaning station formed as the composite station and a second post-electrophoresis cleaning station formed as the independent station.

11. The coating system of claim 10,

the first post-electrophoresis washing station is provided with two surface cleaning devices to perform two-stage surface cleaning on the container, or

12. The coating system of claim 10,

each of the conversion film pre-washing station and the electrophoresis pre-washing station is provided with three surface cleaning devices to carry out three-level surface cleaning on the container, or

And each of the conversion film pre-washing station and the electrophoresis pre-washing station is provided with two surface cleaning devices so as to carry out two-stage surface cleaning on the container.

13. The coating system of claim 2,

the surface cleaning equipment comprises one of a spraying device and a soaking device, and the surface cleaning is carried out on the container in a spraying or soaking mode, or

14. A coating system according to claim 13, wherein in the compounding station the surface cleaning apparatus further comprises at least two reservoirs for providing cleaning liquid, the cleaning liquid after cleaning being collected separately to the respective reservoirs and continuing as cleaning liquid.

15. A coating system according to claim 14, wherein in the same compounding station, an overflow line is provided between adjacent ones of the at least two reservoirs to overflow cleaning liquid in a lower reservoir defined in a cleaning sequence to an upper reservoir adjacent to the lower reservoir.