Pattern combination structure of expendable pattern and expendable patter combination method

Abstract

The invention discloses a pattern combination structure of an expendable pattern and an expendable pattern combination method. The patter combination structure comprises a horizontal runner component (1), a fixed support (7), a plurality of casting mould patterns (8) provided with inner runners (9) and a plurality of inner runner components (4), wherein the two ends of each inner runner component (4) are separately connected with the cross runner component (1) and the fixed support (7); at least one clamping groove (2) is formed in each inner runner component (4); one end of each inner runner (9) is provided with a clamping tail (3) which is connected with the corresponding clamping groove (2) in a matched manner; and the casting mould patterns (8) are separately connected with the clamping grooves (2) through the clamping tails (3) of the inner runners (9). The expendable pattern combination process comprises the following steps: the clamping tails of the inner runners which are arranged on the casting mould patterns are separately inserted into the clamping grooves of the plurality of inner runner components; insertion pins on two ends of the plurality of inner runner components are separately inserted into pin holes in the cross runner component and the fixed support; and contact parts between the clamping grooves and the clamping tails and contact parts between the insertion pins and the pin holes are coated with a cold setting adhesive, and the cold setting adhesive is slicked.

Description

technical field [0001] The invention relates to the field of lost foam technology, in particular to a lost foam assembly structure, and also relates to a lost foam assembly method. Background technique [0002] Lost foam (also known as solid mold casting) is to bond and combine paraffin or foam models similar in size and shape to castings to form model clusters. After brushing with refractory paint and drying, they are buried in dry quartz sand for vibration molding. Pouring is a casting method in which the model is vaporized, the liquid metal occupies the position of the model, solidifies and cools to form a casting. The more complex the casting structure is, the more it can reflect the superiority and economic benefits of the lost foam process. When the lost foam casting process is used for small castings, if a single piece is cast, the utilization rate of the vibration molding equipment is low, and the amount of liquid metal used is low. Casting and multiple pieces in on...

AI Technical Summary

Problems solved by technology

The traditional assembling method is to use hot glue to connect the components. This assembling method has poor positioning accuracy, and gaps are likely to occur at the joints of each pattern, which will cause casting defects such as sand sticking and deformation of the casting during pouring.

The pattern is often not strong enough at the joint. During the drying and moving process, the components need to be bound and fixed, and the number of bonds is very limited. Otherwise, the casting pattern and the pouring rod pattern will easily appear during the transportation process or the sand injection and vibration process of the sand box. Adhesive peeling phenomenon affects the mold setting time and casting quality

For different products, it is necessary to develop different patterns for combination. The development cost of patterns is high and the construction period is long.

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