The mould forming system of disposable tableware in our factory is a kind of automatic continuous multi position hydraulic forming machine. The motion system of the hydraulic system can be connected with PLC control system through RS-232C interface, which lays a hardware foundation for the research and development of PLC control system. The control system shall meet the requirements of reliable forming process, simple operation and convenient maintenance. The control system of injection molding machine in each cycle is divided into 8 processes:

　　1. 在2工位，擴(kuò)壓電機(jī)旋轉(zhuǎn)(3DT作用)，成型缸上升(1dt作用)極限位置，液壓系統(tǒng)壓力上升，閥卸載2.5s。當(dāng)成形筒的上升將上下模具分離時(shí)，擴(kuò)散電機(jī)的旋轉(zhuǎn)力使餐具與模具容易分離。所述成形筒的上升也為步驟2所述給料筒的凸出作了準(zhǔn)備。

　　1. In station 2, the expansion motor rotates (3DT function), the forming cylinder rises (1dt function) to the limit position, the hydraulic system pressure rises, and the safety valve unloads for 2.5s. When the upper and lower dies are separated by the rising of the cylinder, the rotating force of the diffusion motor makes it easy to separate the tableware and the dies. The rising of the forming barrel also makes preparation for the projection of the feeding barrel in step 2.

　　2. 當(dāng)1工位的進(jìn)給氣缸伸長(zhǎng)完成給料時(shí)，3工位的脫料氣缸伸長(zhǎng)(4’dt動(dòng)作)，餐具從裝料桿推出，時(shí)間2.5秒。

　　2. When the feed cylinder of station 1 is extended to complete feeding, the stripper cylinder of station 3 is extended (4'dt action), and the tableware is pushed out from the loading bar for 2.5 seconds.

　　3.暫停5S，在第三站取出餐具。

　　3. Stop 5S and take out the tableware at the third station.

　　4. 在收放1工位上料缸的同時(shí)，第三工位釋放缸收放(4DT動(dòng)作)1.5s。

　　4. While retracting and releasing the loading cylinder of station 1, the release cylinder of station 3 retracts and releases (4dt action) for 1.5s.

　　5. 一次性餐具模具系統(tǒng)的旋轉(zhuǎn)電機(jī)旋轉(zhuǎn)(2DT動(dòng)作)轉(zhuǎn)換為工作站3S。

　　5. The rotation (2DT action) of the rotary motor of the disposable tableware mold system is converted to 3s of the workstation.

　　6. 當(dāng)雙失速電機(jī)旋轉(zhuǎn)(3DT作用)時(shí)，成型缸下降(1DT作用)，餐具形成2.5s。

　　6. When the double stall motor rotates (3DT function), the forming cylinder drops (1dt function), and the tableware forms for 2.5s.

　　7. 兩成型筒在工位位置不變，壓實(shí)和加熱固化時(shí)間為12s。

　　7. The position of the two forming cylinders is the same, and the compaction and heating curing time is 12s.

　　8. 停在1s。

　　8. Stop for 1s.

　　流程要求:系統(tǒng)控制每個(gè)設(shè)備依次按照以上8工作步驟循環(huán)動(dòng)作,形成兩個(gè)電磁鐵控制油缸應(yīng)聯(lián)鎖(也就是說,1 DT和DT只能有一個(gè)行動(dòng)或不行動(dòng)的同時(shí),不同時(shí)),4 DT和4“DT要求是相同的。

　　Process requirements: each equipment is controlled by the system in turn according to the above 8 working steps, forming two electromagnet control oil cylinders to be interlocked (that is, 1 DT and DT can only have one action or not at the same time, not at the same time), 4 DT and 4 "DT requirements are the same.

　　為了滿足一次性餐具模具操作、維護(hù)和調(diào)整方便的要求，需要實(shí)現(xiàn)以下功能:

　　In order to meet the requirements of convenient operation, maintenance and adjustment of disposable tableware mould, the following functions need to be realized:

　　(1)實(shí)現(xiàn)連續(xù)自動(dòng)操作，降低工人的勞動(dòng)強(qiáng)度

　　(1) Realize continuous automatic operation and reduce labor intensity of workers

　　(2)各工序?qū)崿F(xiàn)單步、連續(xù)動(dòng)作、點(diǎn)動(dòng)，便于維護(hù)和調(diào)整。

　　(2) Each process can realize single step, continuous action and inching, which is convenient for maintenance and adjustment.

　　(3)可實(shí)現(xiàn)緊急停車，減少事故發(fā)生。

　　(3) It can realize emergency stop and reduce accidents.

　　(4)實(shí)現(xiàn)工作步進(jìn)狀態(tài)(步)的指示，從而了解設(shè)備運(yùn)行狀態(tài)。

　　(4) Realize the indication of working step status (the first step), so as to understand the operation status of the equipment.

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