摘要:
A method for continuous foaming of a panel of the type including outer layers of web material between which an intermediate layer of insulating foam is interposed, includes the steps of supplying first and second web materials, which are precursors of the outer layers, according to respective mutually converging directions to a dispensing station of reactive mixture intended for generating the intermediate layer of insulating foam. The first and second web materials are oriented according to planes that tilt mutually and converge downwards so as to bound a V-shaped hopper zone. Between the web materials, a calibrated slit is defined in the bottom of the hopper zone for dragging the reactive mixture with squeezing and distribution to the end edges of the web materials. The hopper zone is at least partially filled with the reactive mixture for simultaneously wetting the two web materials advancing downwards. The two web materials are continually advanced along a very steep, vertical or very tilted portion of path, dragging the reactive mixture progressively downwards. A guiding and resting action is supplied along the vertical portion to the first and second web materials to advance the first and second web materials substantially mutually parallel at a controlled mutual distance. Downstream of the portion of vertical or very tilted path, the web materials are diverted along a successive curved portion of foaming path. Downstream of the curved portion, the first web material is guided along a first resting and guiding plane, that is horizontal or almost horizontal, and the second web material is guided along a second resting and guiding plane, tilted with respect to the first resting and guiding plane, such that the first and second web materials advance in a mutually divergent manner at a growing distance from one another along a transition portion of the foaming path along which a guided expansion of the reactive mixture develops. A resting action is provided to the web materials and, with the interposed expanding foam, by two parallel belt conveying devices, along a substantially horizontal final portion of the path to enable the foam reaction to be completed and the shape of the foam to be stabilised. An apparatus for implementing the aforesaid method is also provided.
摘要:
The invention relates to a production system for producing a prefabricated building element, comprising a device (22) for providing a first cover layer (62), a double belt device (46) and a device (44) for applying insulating material onto the first cover layer (62), which is arranged in the production direction upstream of the double belt device (46). In order to produce a cost-effective prefabricated building element that has a simple design, a tool (36) is provided between the device (22) for providing the first cover layer (62) and the device (46) for applying insulating material. The first cover layer (62) is guided through said tool, and said tool is used to form lateral edges of the first cover layer (62), wherein at least a part of the formed lateral edges forms a lateral wall.
摘要:
The invention relates to a method for producing planar products from silicone rubber having a porous structure. For simplified processing and a uniform pore structure, the method is characterized in that a microsphere/silicone oil mixture made of microspheres and silicone oil in a weight ratio of 10:1 to 1:10 is produced, a silicone rubber mixture having the customary mixture components is produced, the microsphere/silicon oil mixture is mixed into the silicone rubber mixture on a roller, the silicone rubber mixture is calendered into webs and the webs are vulcanized.
摘要:
This invention relates to foam insulating products, particularly to rigid, polymeric foam boards comprising extruded polystyrene foam, with increasing the cell orientation and reducing cell anisotropic ratio, as well as the process method for making the products thereof for improving the insulating properties and for reducing the manufacturing cost of the foam products. Alternatively, foam insulating products having increased cell compressive strength may be made by decreasing the cell orientation and increasing the cell anisotropic ratio.
摘要:
A plant for manufacturing a continuous latex foam layer (2) to form mattresses (6) provided with cells (5). The plant comprises a plurality of laying planes (7) provided with a plurality of separate tables (13) separately arranged side by side to form a surface for the foam deposit. Each table comprises protuberances (14) and the arrangement of the protuberances on a table can differ from that of the juxtaposed tables in order to create supporting areas for the different body parts of the user. Preferably the tables (13) with their protuberances (14) are slidably fitted onto the laying planes (7) and can be easily and quickly replaced with separately provided tables having protuberances (14) differently arranged in order to meet the support capacity values required by different users.
摘要:
An apparatus (1) for continuously forming a continuous element (2) made of expanded plastic material comprises: a loading section (8) of a loose mass of granules made of expandable plastic material; a sintering section (16) of the continuous element (2) made of expanded plastic material extending downstream of the loading section (8); a stabilizing section (17) of the continuous element (2) made of expanded plastic material extending downstream of the sintering section (16); a forming runnel (18) extending along the sintering (16) and stabilizing (17) sections and defined between a pair of lateral walls (19, 20) and a pair of gas permeable conveyor belts (21, 22), respectively lower and upper, supported by respective supporting tracks (23, 24). According to the invention, at least one of the supporting tracks (23, 24) of the gas permeable conveyor belts (21, 22) comprises at least one portion extending in the sintering section (16) and angularly tiltable with respect to a transversal centerline plane (π) of the forming tunnel (18) for varying the height of the tunnel (18) in a longitudinal direction. In this way, it is advantageously possible to adjust in an optimal manner both the expansion degree of the granules and their mutual welding to provide a compact structure having the desired homogeneous density and the desired homogeneous and low coefficient of heat conductivity.