摘要:
In a blow mould firstly a convexly formed bottom is blown. An intermediate region lying between an axially displaceable bottom mould and the blow mould bears on mould portions which on introduction of the bottom mould are pivoted back for turning back the bottom region to form a stand ring and release the path for the bottom mould which is finally positioned on the blow mould so that a closed mould cavity is formed on which the transformed bottom region can be reliably applied by blow pressure.
摘要:
A method and an apparatus for making blow-moulded bottle from a preform consisting of at least three layers. For making the preform a tube section heated at one end is shaped by pushing into a closed bottom mould to form a bottom and pressure is exerted in the axial direction on the center bottom region to close the still present gaps in an outer layer as soon as an inner layer has flowed together.
摘要:
To improve the properties of biaxially orientated blow-moulded containers of PET the mouth region of the container serving for fitting a closure member is heat-set, i.e. crystallized at elevated temperature. The heat-setting is effected at the mouth end of a parison or preform and the previously heat-set mouth end is then reshaped to the finished mouth portion. This improves the dimensional stability of the mouth region.
摘要:
The invention relates to an apparatus for producing reinforcements, intended for construction purposes, of reinforced concrete plates for prefabricated ceilings, without manual aid. The apparatus comprises a straightening and cutting device 1 for the transverse rods 22 of the reinforcement having a transverse rod outlet path 4, a displacement apparatus 46 and a transverse rod magazine 7; a straightening, cutting and bending device 2 for the longitudinal rods 23 having a longitudinal rod outlet path 5; and a combination device 3 for producing the lattice girders 24, having a lattice girder outlet path 6 and a lattice girder magazine 8. With the aid of the transverse rod magazine 7 and two insertion robots 9 and 10 that are displaceable on rails 67, the reinforcement can be inserted and positioned under electronic control into the form 18 that is arranged on a pallet 15 and is moved through the apparatus on a travel path 13. A slip-on device 29 serving to slip spacers 30 onto the transverse rods 22 is disposed between the straightening and cutting device 1 and the transverse rod outlet path 4. The entire reinforcement is made from round wires and bands of structural steel wound into rings.