Sprayed product, and production method and special die thereof

Abstract

The invention discloses a sprayed product, and a production method and a special die thereof. The product comprises two substrates (11), each of the substrates (11) has a honeycomb paper sandwiched glass fiber reinforced polyurethane structure, the substrates (11) are connected through a reinforcing band (22), and the reinforcing band (22) is fixed on the substrates (11) through a polyurethane material forming the glass fiber reinforced polyurethane structure in the molding process of the substrates (11). The production method comprises the following steps: putting the reinforcing band in a die, putting glass fiber felt and honeycomb paper sprayed with the polyurethane material into the die, and molding. The die comprises a surface layer die (42) and a back layer die (41), the back layer die (41) is provided with an extrusion cutter (43), the surface layer die (42) is a plane, and a gap of 0.5-3mm is maintained between the extrusion cutter (43) on the back layer die (41) and the surface layer die (42). The production method of the product has the advantages of simplicity, low cost, improvement of the reliability of the product, and convenient die processing.

Description

Technical field: [0001] The invention relates to the technical field of a spare tire cover plate, in particular to a spray-coated product, a production method and a special mold thereof. Background technique: [0002] At present, the existing spraying products, such as the spare tire cover, often use glass fiber reinforced polyurethane (GMPU) sandwiched by honeycomb paper as the substrate, and the surface is compounded with needle-punched or tufted carpet with hot melt adhesive; for the spare tire cover In other words, the folding structure is a common design, which can facilitate access to tools and other items under the cover, such as figure 1 As shown, the most common structure is that two substrates 11 are connected together with a carpet 90 on the surface, and the two are laminated with hot-melt adhesive. The disadvantage of this structure is that the tensile strength of the needle-punched or tufted carpet itself is not high. During use or testing, defects such as carp...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that the tensile strength of the needle-punched or tufted carpet itself is not high. During use or testing, defects such as carpet stretching and carpet peeling will occur at the folded parts.

[0003] Afterwards, an improved solution is adopted, adding a reinforcing belt 22 at the connection part, first bonding the reinforcing belt 22 to the substrate 11 with a hot melt adhesive 23, and then using the hot melt adhesive to composite the substrate 11 and the fabric 90; the hot melt adhesive 23 can be set onto the substrate 11, such as figure 2 As shown, it can also be set to the reinforcement band 22, such as image 3 As shown; in this way, it is necessary to design a groove for placing the reinforcing belt 22 on the substrate 11, and then use hot melt adhesive 23 to realize the bonding of the reinforcing belt 22 and the substrate 11; so the process needs to be increased, and the hot melt adhesive and reinforcing belt, increase the cost

[0004] In order to paste the reinforcing tape 22 on the surface of the substrate 11, it is necessary to leave a pit in advance on the substrate 11, see Figure 4 , so it is reflected on the mold that there is a boss 44 on the surface layer mold 42, and the height of the boss is related to the thickness of the reinforcing belt 22 and the thickness of the hot melt adhesive 23 used; The gap between the knife 43 and the boss 44 in the mold clamping state is 0-0.5mm, and the processing of this mold is complicated

Images