Sand mold molding device and sand mold molding methods

A sand mold, non-parting technology, applied in molding machines, manufacturing tools, casting and molding equipment, etc., can solve the problem of parting surface sand mold non-parting surface sand mold compactness moderate, good air permeability, can not guarantee the parting surface sand mold enough The problems of compactness, the sand mold on the parting surface is not compact enough and air permeability, etc., to achieve the effect of good compactness and uniformity, not easy to drop the molding sand, and moderate compactness.

Inactive Publication Date: 2016-03-30
湖南华民控股集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited action area of ​​the pressure rod, this method cannot ensure that the sand mold on the parting surface is compact enough; and the pressure rod compacts the sand mold on the non-parting surface, which will cause the sand mold on the parting surface to be not compact enough or because the sand mold on the non-parting surface is too tight. The air permeability is poor due to tightness, and it is impossible to ensure that the sand mold on the parting surface is sufficiently tight and the sand mold on the non-parting surface is moderately tight and has good air permeability.

Method used

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  • Sand mold molding device and sand mold molding methods
  • Sand mold molding device and sand mold molding methods
  • Sand mold molding device and sand mold molding methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1, The sand molding device of this embodiment includes a mold 5, a fixed template 4, a movable template 3 and a pressing rod mechanism. The mold 5 and the fixed template 4 are stacked up and down, and the mold 5 is arranged on the fixed template 4 . The mold 5 has a first inner cavity, the fixed plate 4 has a second inner cavity, and the first inner cavity communicates with the second inner cavity. The movable template 3 is movably and form-fittingly inserted in the second cavity of the fixed template 4 from below, that is, the movable template 3 can slide in the second cavity, and during the sliding process, the movable template 3 The initial position is lower than the parting surface of the fixed template 4 and the mold 5 at a certain height, and the side wall of the movable template 3 is always in contact with the inner cavity surface of the second inner cavity, so that the inner cavity surface of the first inner cavity of the mold 5, The inner surf...

Embodiment 2

[0069] refer to figure 2 , in this embodiment, the difference from Embodiment 1 lies in the structure of the pressing rod mechanism.

[0070] Specifically, in this embodiment, the pressure rod mechanism includes a pressure rod 9 and a hydraulic cylinder. The maximum pressure value of the hydraulic cylinder is adjustable. The hydraulic cylinder drives the pressure rod 9 to move up and down and controls the pressure rod 9 to exert a controllable pressure.

[0071]When the pressure rod 9 just presses down on the sand mold 6, the resistance that the pressure rod 9 bears is less than the maximum pressure value of the hydraulic cylinder, and the pressure of the hydraulic cylinder increases with the resistance of the pressure rod 9; when the sand mold 6 reaches a certain tightness During solidification, the resistance of the pressure rod 9 increases to the maximum pressure value of the hydraulic cylinder, and the overflow valve of the oil circuit of the hydraulic cylinder begins to ...

Embodiment 3

[0087] refer to image 3 , in this embodiment, the difference from Embodiment 2 is that a sand guide rod 15 is also provided on the movable formwork 3, and a hole for accommodating the sand guide rod 15 is provided in the pressure rod 9, and the hole and the sand guide rod 15 to realize the compaction of the sprue mouth sand mold 6.

[0088] It can be understood that in this embodiment, the movable formwork 3, the positioning part 2, the sand guide rod 15 and the fixed formwork 4 constitute a split formwork

[0089] The above-mentioned movable template 3 is used to apply pressure evenly to the lower sand mold 6, so that the sand mold 6 on the entire parting surface is sufficiently compact, effectively reducing the sand inclusion defects of the ball casting; Controlled pressurization, and the sand guide rod 15 and the perforated pressure rod 9 are compacted to form the sand mold 6 sprue, so that the entire upper sand mold 6 has moderate compactness and good air permeability, e...

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PUM

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Abstract

The invention relates to a sand mold molding device and sand mold molding methods. The sand mold molding device comprises a mold, a fixed mold plate, a moving mold plate and a compression bar mechanism, wherein the moving mold plate is movably inserted in a second inner cavity of the fixed mold plate from below in a shape matching manner, and is used for applying upward pressure to a parting surface of a sand mold; and the compression bar mechanism is vertically movably arranged above the mold, and is used for applying downward controllable pressure to a non-parting surface of the sand mold. One sand mold molding method comprises the steps of driving the moving mold plate to move upwards to apply upward pressure to the parting surface of the sand mold, and driving the compression bar mechanism to move downwards to apply downward controllable pressure to the non-parting surface of the sand mold at the same time. The other sand mold molding method comprises the steps of applying controllable pressure to the non-parting surface of the sand mold, and applying pressure to the parting surface, arranged opposite to the non-parting surface, of the sand mold at the same time. According to the sand mold molding device and the sand mold molding methods, the compactness and uniformity of the lower part of the sand mold and the air permeability of the upper part of the sand mold are good.

Description

technical field [0001] The invention relates to the field of casting, in particular to a sand molding device and a sand molding method. Background technique [0002] Metal mold casting adopts horizontal parting, and the gating system can be set at the center of the casting, so that the flow of molten metal in the cavity is short, the temperature distribution is uniform, and the overall quality of the casting is stable. However, since the riser system runs through the upper half of the mold, sand is usually used to form the riser system, which is convenient for castings to be released. The sand mold molding methods of the existing pouring riser system are divided into manual molding and mechanical molding. [0003] Among them, the manual molding uses an integrated formwork, and the sand mold is manually compacted several times. When molding in large quantities, the work intensity of the workers is high and the work efficiency is low. Therefore, manual molding is not suitable...

Claims

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Application Information

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IPC IPC(8): B22C15/08
CPCB22C15/08
Inventor 袁黎程文财万龙华
Owner 湖南华民控股集团股份有限公司
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