The tariffs on goods produced in China beginning July 6th, 2018 will definitely affect the machinery market. How that happens will remain to be seen, but here are some things to consider. 
   We have already been notified by some suppliers of Chinese machinery that their prices will increase to cover the costs of the imports. But one of the factors that may be lost to some is that there are very few machines in the US that are completely made with US parts.  So while the prices of the Chinese machinery will definitely increase, you may see the prices of the US equipment increasing also, or in the case of injection molding, the steep discounts currently offered decrease or disappear.  
   

As the prices of new Chinese and US machinery become closer, you may see that machinery on the secondary market becomes more valuable. Without the cheaper Chinese alternative, the budget-conscience buyer may be forced into the used market. 
We aren't sure where this major shift will lead, but will be keeping a close watch on it. 
A few of the plastics machinery related categories the tariff affects are below:

8465.92.00  Planing, milling or molding (by cutting) machines for working wood, cork, bone, hard rubber, hard plastics, or similar hard materials

8465.93.00  Grinding, sanding or polishing machines for working wood, cork, bone, hard rubber, hard plastics or similar hard materials

8465.94.00  Bending or assembling machines for working wood, cork, bone, hard rubber, hard plastics or similar hard materials

8465.99.02  Machine tools for working wood, cork, bone, hard rubber, hard plastics and similar hard materials, nesoi

8477.10.30  Injection-molding machines for manufacturing shoes of rubber or plastics

8477.10.90  Injection-molding machines of a type used for working or manufacturing products from rubber or plastics, nesoi

8477.20.00  Extruders for working rubber or plastics or for the manufacture of products from these materials, nesoi

8477.30.00  Blow-molding machines for working rubber or plastics or for the manufacture of products from these materials.

8477.40.01  Vacuum-molding and other thermoforming machines for working rubber or plastics or for manufacture of products from these materials, nesoi

8477.80.00  Machinery for working rubber or plastics or for the manufacture of products from these materials, nesoi

8477.90.25  Base, bed, platen and specified parts of machinery for working rubber or plastics or for manufacture of products from these materials, nesoi

8477.90.45  Barrel screws of machinery for working rubber or plastics or for the manufacture of products from these materials, nesoi

8477.90.65  Hydraulic assemblies of machinery for working rubber or plastics or for the manufacture of products from these materials, nesoi

8477.90.85  Parts of machinery for working rubber or plastics or for the manufacture of products from these materials, nesoi

8480.71.10  Molds for rubber or plastics, injection or compression types, for shoe machinery

8480.71.40  Injection or compression type molds for rubber or plastics for the manufacture of semiconductor devices

8480.71.80  Molds for rubber or plastics, injection or compression types, other than for shoe machinery or for manufacture of semiconductor devices