1 Introduction Small desktop screen printing machine. Printing and decoration on the surface of cylinders or conical products such as bottles and cans can be promoted abroad. The 03400-type full air-controlled screen printing machine designed and manufactured by our factory adapts to the needs of the market. The machine has strong competitiveness after being tested by the market and users.
The machine is controlled by a full air control system, and the design of the pneumatic system is now discussed.
2 Screen Printing Machine Process Analysis Screen printing machine is a small desktop printing machine for printing trademark text on the cylinder or the circumference of a cylinder or cone. Since the printing is performed on a cylinder or a conical surface, in the printing process, the printing member must be clamped and rotated, for example, the printed screen should be horizontally reciprocating and vertically moving up and down. At the same time, the screen and the printing member must move synchronously, the rotation of the printing member and the screen scraper 2 wire, 3 printing member 3, the principle 3 horizontal movement printing, the 3 action sequence on the screen, and the printing of the lower printing substrate The brush is required to brush the ink on the screen; the scraper applies the screen to the side of the substrate. Therefore, the brush and the scraper should be vertically moved up and down, and the direction of movement is exactly shifted from each other. 2. When the print is applied, the scraper is lowered, and the brush is lifted and retracted; when the ink is not applied, the action is reversed. Therefore, the screen printing process flow 3 workflow.
The screen moves down the scraper to start, the brush lifts the clamped screen and the screen retreats, the screen moves forward and the screen is lifted. The lifter lifts the brush and lowers the print. 3 The characteristics of the pneumatic system design According to the working principle, the screen machine should be able to The ink is evenly spread in the art flow analysis, and the operation procedures of each process are as follows, 659.3, such as 563, designing and researching the vertical cylinder that is raised or lowered by the combination of the cylinder screen brush scraper; the vertical cylinder of the cylinder 8 scraper moving up and down; Vertical cylinder with cylinder 0 brush moving up and down; horizontal cylinder of cylinder 0 wire mesh mechanism; horizontal cylinder of cylinder clamping mechanism.
Then, according to the process procedure of each process of the process flow 4.
According to the above procedure, it can be determined that the action program is a sequence program.
That is, different cylinders are sequentially expanded and contracted in order. Therefore, the main drive and the main control circuit are connected in sequence, there is no obstacle signal, and it is a simple gas path. However, according to the performance requirements of the machine, its corresponding control function has its special requirements, mainly (1) to adapt to cylinders with different radii. Or the cone print, the need for the brush, the length of the horizontal movement of the screen version varies. That is to say, the horizontal cylinder that drives the screen plate to move horizontally does not normally take the full stroke of the cylinder, but starts at the full stroke. The length of the stroke is adjusted according to the length of the printed arc length in an intermediate section between the terminals. 5. Therefore, in order to avoid reciprocation of the middle section of the full stroke due to the horizontal cylinder not going full stroke, the overstroke caused by inertia may be caused. Phenomenon, the non-door component is installed on the intake path of the horizontal cylinder, and the terminal of the actual stroke is supplemented with a stopper to realize the requirement of this control function.
According to the requirements of the screen printing process, when the printing machine is temporarily stopped and not printed, in order to avoid the ink drying on the screen plate, the horizontal cylinder that needs to drive the screen to move should continue to reciprocate, so that the screen Uninterrupted reciprocating movement relative to a fixed brush. That is equivalent to the brush in the wire mesh machine. Reciprocatingly move the ink on the screen evenly. In order to achieve this control requirement, it is necessary to design a circuit that enables the horizontal cylinder to perform a single reciprocating motion. In addition to solving this special control function requirement, we also solved the continuous cycle motion of the horizontal cylinder from the single continuous motion to the whole machine in the process of non-stop. Or from the continuous cycle of the whole machine without interruption, immediately convert to a single continuous action. The action conversion can be realized by operating the same pneumatic button, and the operation is simple.
(3) The printed product is clamped and loosened without stopping.
If the bitter denture is misaligned or otherwise faulty, it must be loose. Therefore, a single-action control loop of the clamping station is designed in the system, which can be clamped at any time or released in an emergency.
As mentioned above, the key to the design of the local pneumatic system is to combine various complicated auxiliary air circuit designs that meet the requirements of special control functions.
The combined logic system of the whole machine pneumatic system 6 double dotted line frame is simplified.
Since the pneumatic system adopts a full air control scheme, in order to avoid the use and appearance of the complicated pneumatic pipeline, we have developed a special pneumatic integrated control box. 7. In addition to the output line connecting the actuator and the input line connecting the stroke valve and the control button, all the other control lines are integrated on the panel inside the small control box to facilitate component repair and replacement. After the pneumatic system is integrated, when the main engine is assembled, the pneumatic system is very simple, and because the exposed pipeline is small, the pipeline layout of the whole machine is very clear and concise, and it is convenient to use and maintain.
4 Conclusions The 03400 type screen printing machine is designed from the main engine to the pneumatic system. The operation test after the pneumatic system is installed has reached the design requirements, and the operation is stable and easy to operate. Because it is full air control, the working medium is single, and after the system is integrated, the maintenance is very simple, the system works reliably, and the whole machine is low in cost. Practice has shown that the design and assembly of the aircraft's pneumatic system is successful.
Zheng Hongsheng. Pneumatic transmission. Northeast Institute of Technology 2 æ›° ä¸ä¸çŽ„è¡Œ. Pneumatic mechanism and circuit design 3 Flow Control Laboratory of Shanghai University of Technology. Pneumatic technology is based on page 17 4 Conclusions 1 The stability of the inverted trolley depends on the rebound of the flipping platform and the impact of the turning mechanism.
To improve the stability of the turning trolley, it is necessary to find the inflection point of the turning mechanism, adjust the center of gravity of the flipping platform; adjust the turning speed to make the inverting cylinder exhaust smoothly, and adopt a cylinder with good cushioning performance; at the same time, a vibration damping device is adopted.
By adopting the above technical improvement measures, the running stability of the pneumatic turning trolley is significantly improved. The promotion and application of several production lines in an automobile manufacturing plant reduced the labor intensity of operators, reduced the working time and labor of production lines, reduced the potential safety hazards, achieved the expected results, and obtained good social and economic benefits. benefit.
1 full wind Shu. Analysis and control of the running smoothness of the hydraulic turning mechanism of the welding line. Automotive Technology and 2SMC China Ltd. Modern practical pneumatic technology. Beijing Machinery Industry Press, closed up, 3
1. Product Introduction
Carburizing agent, there are many kinds of raw materials, production processes are different. It has wood carbon, carbon coal, coke, and graphite type in which various categories and a lot of small types. High quality carburizing agent generally refers to after graphite carburant. Under the high temperature, the carbon atoms arranged in graphite morphology,so called for graphitization. graphitization can reduce the content of impurities in the carburant, increase carbon content and reduce sulfur content.It used for casting steel and iron. With high carbon and low sulfur, low water content and low cost characters.
2. Classification
At present, there are 3 kinds of commonly used carburetant:
First, graphite powder, which is a vacuum powder by graphite electrode processing.
Second after petroleum coke, which is used in some domestic steel plant to make of carburizing agent.
Third is the graphitized petroleum coke, which is also used as recarburizer in steel making.
3. Application
Induction furnace carburizing; cupola furnace carburizing; double process carburizing; furnace ladle with the current carburizing
4. Process
Take the Taixi Anthracite into the graphite furnace, in accordance with the power curve send to the furnace power, under the high temperature of 800 DEG --1350 DEG C,it occurs a series of physical and chemical reactions, and discharge the sulfur content, moisture, volatile, ash and other impurities, and then cooling, crushing, packaging and storage according to the size requirements of service.
The raw materials from the top into the tank feeding device during the calcination, in the process of moving from the top to down,it being located by tank fire on both sides of the heating. The heat in the combustion is generated by the fire wall directly to the raw materials. When the raw materials` temperature reached 350~600 degrees,the large number of volatiles released through volatilization. Then collected and sent to the burning fire lane. The volatile combustion is another source of heat pot calciner. Raw temperature after above1200 to 1300 DEG C`s incineration, it completes a series of physical and chemical changes, then from the bottom of the material tank into the water cooling, and finally discharged outside the furnace by the feeding device .
The carburizing agent after the calcination, then after cooling and into the roll crusher, sorting, crushing, in order the granularity reached: 0--1mm, 1--3mm, 3--5mm, 5--8mm, 8--10mm, 10--25mm, etc., and then packaging according to different needs of customers.
5. Transportation and Packing
Woven bag, lined with plastic film bags, each 25kg can also be packaged according to customer demand.
The product should be placed in a cool and dry place during storage, transport process, prevent and hard material mixed, to prevent carbon particles broken, affecting the quality of packaging to prevent breakage. To avoid leakage or mixed with debris, water, oil and fire.
Filter Material,Quartz Sand,Filter Media Rolls,Water Filter Material
Ningxia YiFeng RuiDa Activated Carbon Co.,LTD , https://www.nxyfrdhxt.com