How to package large-scale machinery and equipment for export?

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how to package large-scale equipment for export? For the export packaging of Large-scale Electromechanical equipment, due to the large volume and heavy weight of the product itself, coupled with the long transportation distance and the complex process of storage, transfer, loading and unloading and transportation, there will be various mechanical loads, which may damage the product. Due to the abnormal climate change in the whole logistics process, it also has a great impact on the contents; Therefore, the transportation and export packaging of electromechanical equipment is more complex
take the export packaging of a large German locomotive as an example, talk about the export packaging process and related contents of large electromechanical equipment. I Brief introduction to packaging materials and packaging requirements the packaging product is a train locomotive to be exported from China to South American countries
II Packaging technology and packaging molding process
2.1 packaging molding will design the structural size of the packaging wooden box according to the equipment. Here, the corresponding packaging materials will be selected according to the design requirements and single piece processing will be completed; For the packaging of locomotives, timely process and assemble the base with four skids, two end logs, two long logs and bottom plates, the columns, diagonal braces, box plates and other components in the end plates of separated side plates, and the beams, connecting beams and top plates required for the top cover, and then transport them to the packaging workshop. Because the locomotive is particularly heavy, the base structure composed of skid and end wood is certainly difficult to bear when lifting, so steel wood composite structure is selected
the so-called steel wood composite structure is to set two 125px thick steel plates horizontally at the lifting position during loading and unloading. A small vertical steel plate is welded at both ends of each steel plate, and the small steel plate is provided with a lifting hole through the steel cable. The middle of the two transverse steel plates are respectively welded with several support blocks according to the bottom structure of the locomotive. Then fix four long skids on the two steel plates, with a cross-sectional size of 2ocm × 24 cm。 At both ends of the skid, one end wood is fixed with bolts, and its section size is 10 cm × 2O cm。 Then nail a board with a width of 10 cm and a thickness of 24 mm on the skid as the base plate. A long wood is fixed on the two long side edges of the base respectively. The two long wood are located on the bottom plate, and the outer side is flush with the bottom plate. Their long ends end at the inner side of the end wood, just forming an outer frame with the end wood
the long wood is fixed with bolts. Instead of ordinary nuts, ring nuts are used at intervals to provide a fastening place for the safety belt to be used. Similarly, ring nuts are also used on the two intermediate bolts of the end wood. After that, lift the base and nail some narrow boards horizontally at a certain distance under the skid. Its function is to prevent the bolt head extending out of the skid from damaging the ship’s deck, etc.
and to further improve the overall strength of the base. Next, lay a piece of bubble plastic film on each of the two transverse steel plate support blocks; Then lay a layer of vapor phase antirust film on the whole bottom plate; Then lay a layer of bubble plastic film on the antirust film at the place where the steel plate supports the locomotive, then place a piece of plywood on it, and put a few small pieces of anti-skid rubber pads on the plywood
vapor phase antirust film is a special solid material mixed into plastic film. During storage and transportation, this solid material will release a gas molecule to cover the metal surface and form a protective layer to prevent the chemical reaction between oxygen and moisture and metal and ensure that electromechanical equipment will not be rusted. Heat sealing it can also block water vapor. Two layers of bubble plastic film can prevent the lower steel frame and the upper plywood from damaging the vapor phase antirust film and affecting the sealing antirust effect. Plywood can prevent the metal at the bottom of the locomotive and the steel frame on the base from being hard hit, resulting in damage or damage to the antirust film. The function of rubber liner is to increase the friction coefficient and prevent the locomotive from sliding and damaging the locomotive during transportation. Fix the locomotive on the base with safety belt and ring nut around the locomotive, and the tensile force borne by the safety belt is 5O kn
the movable accessories inside the carriage, such as fire extinguishers, shall be fixed and hung with a certain amount of desiccant bags to prevent corrosion in the locomotive box. Finally, the vapor phase antirust film covered on the upper part and the vapor phase antirust film laid below can be heat sealed to achieve better antirust effect. Then wind the loose VCI film with adhesive tape to minimize its volume and prevent other assembly accessories from scratching the film. The outer packaging of the locomotive adopts closed wooden cases. The end plate and side plate are made of thick narrow wood, which is a mixed structure of frame wood and plywood. Each side consists of 13 plywood with frame wood structure. The frame wood of each component of the side plate extends to the left and right to facilitate the connection between small pieces of plywood. The whole side plate is only nailed to half the height from bottom to top to facilitate the installation of the top cover. The top cover will be 10 cm × Four 20 cm rectangular timbers are connected into two angled composite frame timbers with bolts, and then the two frame timbers are placed on both sides, and 18 evenly distributed beams are nailed on them to form the frame structure of the top cover. The width of the frame is the width of the top cover, that is, the sum of the length of the beam and the width of the long wood
use a crane to lift the top cover frame and 7 plywood used as the top plate to the top of the locomotive, and nail the top cover frame and column into one. Next, first nail the remaining parts of the side plate and the upper part of the end plate, and then nail all the top plates to the top cover frame to seal all the top covers. So far, the packaging box of the whole locomotive has been formed. III The strength should be considered first when designing and checking wooden packing cases. The steel plate used for locomotive packaging needs to bear the weight of the whole packaging box and the impact force generated during lifting. Before that, it has been calculated and checked by the manufacturer according to the requirements. For ordinary wooden packing box, its calculation and checking calculation are divided into base, end plate, side plate and top cover. The most important part of the base is the skid. The number of skids usually depends on the width of the packing box. The German standard stipulates that two skids are used for the width of less than 100 cm, and at least three skids must be used for the width of more than 180 cm, and the distance between each two skids cannot exceed 😯 cm. The dimensions of skids and sleepers must be obtained through calculation, that is, combined with the allowable bending strength to check whether the selected section size is sufficient to bear the external force during lifting. Germany often checks the shear strength and compressive strength of skids. This refers to the stress of the skid when the lower part of the skid is subjected to the upward force of the hanging chain cable, and the upper part of the skid is subjected to the downward force of the pressure transmitted by the package through the sleeper. If the section size and strength of the skid are not enough, the skid will be damaged, which will affect the strength of the whole packing box. The calculation resu
lt shall not exceed the allowable pressure strength. For pine, the allowable empirical value is 0.2 kn /cm2
similarly, it is also possible to check whether the end face and side face will break or collapse during stacking, and whether the top cover will be squeezed laterally by the chain cable during lifting or compressed during stacking. 2.2 packaging auxiliary process the packaging process also includes the following auxiliary processes. First, lay a layer of sunscreen and rainproof plastic film on the surface of the top cover of the packing box, and its edge droops to cover the upper part of the end plate and side plate by about 2cm, and fix the plastic film around the end plate and side plate of the wooden box with special small tools. The film has very good mechanical properties, is not easy to tear, and can play a good role in rainproof
then nail the protective iron at the lifting position of the upper edge and bottom edge of the packing box respectively, and mark the lifting mark. Finally, the end plate and side plate shall be sprayed with marks such as upward, fear of moisture, center of gravity, packaging contract number, and indicate the product name, packaging size, weight, destination, etc. The export transportation packaging of locomotives was completed.

it is better to treat specific situations. The large-scale ones that can be disassembled are packed and exported in sea containers; Those that cannot be disassembled can be transported by sea bulk cargo or framed and boxed for export. In this case, there are two kinds of packaging: (1) wooden support for the machine (2) those with lifting points can be loaded directly by crane. The premise of these packaging is that the machine is not afraid of rain and wind! Those who are afraid of rain must be wrapped with professional packing cloth and loaded into bulk carriers.

generally, large-scale equipment can only be packed naked. For parts loaded in containers, they can be packed in wooden cases and in containers. Oversized and overweight goods will go in bulk, but the shipping schedule of bulk ships is generally unstable. Therefore, we should pay attention to the statement when signing the contract here. Also, in general, it is also necessary to indicate that partial shipment, installment and transshipment are allowed!

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