Core difficulties in the production of car mudguard molds

The complex surface shapes of mudguards are often irregular arcs or streamlined surfaces, with large differences in surface height and varying degrees of curvature. The mold parting surface is difficult to be regular, and the fitting accuracy of the shape is required to be high, which easily leads to problems such as mold misalignment and loose sealing of edges and corners.
It is difficult to control the size and assembly accuracy, and it is necessary to accurately match the vehicle wheel arches and chassis installation positions. The tolerance requirements for product hole positions, buckle positions, and installation positioning slots are strict. Even slight deviations in mold processing can lead to large gaps, inability to install, and loosening noises during loading.
The demolding slope and draft design are difficult. The product is covered in a large area and has many local inverted structures. It is difficult to control the draft angle. If the angle is too small, it is easy to scratch the surface of the product. If the angle is too large, it will affect the appearance and assembly dimensions. The inverted position needs to be precisely aligned and coordinated with the core pulling mechanism.
The difficulty of controlling deformation and warping is high, and the mudguard area is large and the wall thickness is uneven. Injection molding cooling shrinkage is prone to middle arching, edge warping, and twisting deformation. The mold needs to accurately compensate for shrinkage and balance the layout of the cooling water circuit.
The surface appearance requirements are high, and the exposed parts require no shrinkage, flow marks, or joint marks on the surface. The uniformity of mold polishing and texture etching is difficult to control, and improper design of the inlet point of the flow channel can easily produce obvious weld marks.
The balance between mold strength and durability leads to large-scale thin-walled molding of products, uneven stress on the mold cavity, and long-term mass production is prone to mold cavity wear, collapse, and burrs. Therefore, it is necessary to select mold steel reasonably, carry out quenching heat treatment, and wear-resistant reinforcement.