Please also refer to figure 1 and figure 2 , Shown is a combined production line 30 in the first embodiment of the present invention, which includes four container units 10 connected end to end to form a single-layer ring-shaped overall structure.
 Each container unit 10 includes a hollow rectangular box body 11, a plurality of machines 13 housed in the box body 11, and a conveyor belt 15 connected between the machines 13. The box body 11 includes a rectangular flat bottom plate 110, a top plate 112 parallel to the bottom plate 110, left and right side plates 113 respectively connected to the bottom plate 110 and the opposite sides of the top plate 112, and respectively connected to the bottom plate 110 Front and rear doors 115 at opposite ends of the top plate 112. The bottom plate 110, the top plate 112, and the left and right side plates 113 jointly form a receiving space 116 that contains the machine table 13 and the conveyor belt 15. The front door 115 is pivotally connected to the front end of the bottom plate 110, and the front door 115 can be rotated upward in the direction of the top plate 112 with the front end of the bottom plate 110 as a rotation axis, and can be opened or closed relative to the box 11 respectively. The rear door 115 is pivotally connected to the rear end of the top plate 112, and the rear door 115 can rotate downward in the direction of the bottom plate 110 with the rear end of the top plate 112 as a rotation axis, and can be opened or closed relative to the box 11 respectively. A plurality of windows 117 are respectively opened on the left and right side plates 113 along the extending direction thereof. The window 117 can be used to monitor the operating status of the machine 13 in the container unit 10. The number of the windows 117 can be changed according to the required strength of each box 11. When the strength of the box 11 is sufficiently large, the number of windows 117 can be increased to reduce weight and save costs. Different machines or other equipment are respectively configured in the container unit 10 to realize independent and different processes. When it is necessary to form a production line for manufacturing or processing a certain product, the container units 10 that can complete the required process can be selected and connected in sequence.
 See image 3 In the following, the combined production line 30 will be described in detail by taking the manufacturing process of a circuit board as an example. Assuming that the circuit board manufacturing process includes the mounting process 101, the inspection process 102, the plug-in process 103, and the soldering process 104 in sequence, the four container units 10 in the combined production line 30 are respectively related to the mounting process 101 and the inspection process 102. , The plug-in process 103 and the welding process 104 correspond. A container unit 10 is equipped with a surface mounting technology (Surface Mounting Technology, SMT) machine, which is used to implement the mounting process 101 of some parts on the circuit board; a container unit 10 is equipped with automatic optical testing (Automatic Optics Testing, AOT) machine and X-Ray inspection machine, used to realize the inspection process 102 of detecting whether the placement position of the parts mentioned in the placement process is correct; a container unit 10 is equipped with a non-SMT part automatic plug-in machine for The plug-in process 103 of partially plugging parts on the circuit board is realized; a wave soldering machine is arranged in a container unit 10 to realize the welding process 104 of welding and positioning the parts on the circuit board. When composing the combined production line 30, please refer to figure 1 , The container unit 10 is arranged in the order of the mounting process 101, the inspection process 102, the plug-in process 103 and the welding process 104. Between the two adjacent container units 10, the front door 115 of one of the container units 10 and the other container The rear door 115 of the unit 10 faces up and down, and four fixed posts 18 are respectively supported at the four corners between the front door 15 and the rear door 15, and each is fixed by a fixing member (not shown). The top and bottom ends of the fixing column 18 are locked with the front door 15 and the rear door 15 to connect the container unit 10. When the combined production line 30 is running, the conveyor belt 15 in the container unit 10 is sequentially connected through the intermediate conveyor belt 16, and the original circuit board is imported from the container unit 10 that implements the mounting process 101, and passes through the container in turn via the conveyor belt 15. The process corresponding to unit 10 can be output afterwards.
 When the combined production line 30 needs to be relocated, the container units 10 are separated by disassembling the fixing columns 18, and the container units 10 are used as the unit for transportation. When the transportation reaches the destination, the container units 10 can be connected. Therefore, it is convenient to move and assemble quickly, and save costs. Secondly, because each container unit 10 can realize an independent process, one or more container units in an idle combined production line can be combined with another combined production line. One or more of the container units are recombined to form a combined production line that can be used to manufacture or process new products, thereby facilitating the use of idle resources and saving costs; in addition, since each container unit 10 can realize an independent process, when the combination is required When the modular production line is upgraded, it can be realized by adding one or more new container units between the corresponding container units, which is easy to operate.
 See Figure 4 and Figure 5 , Shown is a combined production line 50 according to the second embodiment of the present invention, which includes eight container units 40 stacked up and down to form a double-layer ring-shaped overall structure. The structure of the container unit 40 is substantially the same as the structure of the container unit 10 in the first embodiment, and each container unit 40 is provided with different equipment for implementing different processes. Among them, the container unit 40 on the lower layer corresponds to the first step 401, the second step 402, the third step 403, and the fourth step 403 in turn; the container unit 40 on the upper layer corresponds to the fifth step 405, the sixth step 406, and the seventh step in turn. Step 407 and the eighth step 408. The container unit 40 corresponding to the fifth step is located above the container unit 40 corresponding to the fourth step, with an upload transmission device 41 between the two; the container unit 40 corresponding to the eighth step is located on the container corresponding to the first step Above the unit 40, there is a lower transmission device 42 between the two.
 When the combined production line 50 is in operation, the products to be processed are input from the container unit 40 corresponding to the first step 401, and after passing through the lower container unit 40, the corresponding first step 401, second step 402, and third step After 403 and the fourth step 403, they are transmitted upwards to the container unit 40 corresponding to the fifth step via the upload transmission device 41, and then sequentially go through the corresponding fifth step 405, sixth step 406, seventh step 407, and the corresponding fifth step 405, sixth step 406, and seventh step 407 of the upper container unit 40. After the eighth step 408, it is transmitted to the lower level output via the down transmission device 42. The use of the double-layer ring-shaped overall structure is more suitable for combined production lines with more processes, making the structure of the combined production line more compact.
 In specific implementation, the number of container units 10, 40 included in the combined production line 30, 50 can be changed according to the number of processes; the connection between two adjacent container units 10, 40 is not limited to passing through fixed columns. 18 connection, such as a structural connection with mutual buckles; the container units 10, 40 in the combined production line 30, 50 are not limited to the overall structure arranged in a ring, for example, they can be arranged in a straight line or arbitrarily as required Polygonal overall structure, in order to realize the automatic horizontal transfer of products and sequentially pass through the process of the container unit; the container units 10, 40 in the combined production line 30, 50 are not limited to a single-layer or double-layer overall structure, such as It can be arranged into an overall structure of three or more layers as required to realize the automatic horizontal and vertical transfer of products through the process of the container unit in sequence.