CN1052622A

CN1052622A - A kind of novel continuous-flow type running gate system that goes up

Info

Publication number: CN1052622A
Application number: CN 89109471
Authority: CN
Inventors: 哈大为
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-19
Filing date: 1989-12-19
Publication date: 1991-07-03

Abstract

A kind of running gate system of forming by cup (1), sprue (2), cross gate (4), ingate (6) etc., it is low early and high after to it is characterized in that cross gate and ingate all can be, and presents the continuous-flow type structure, and its upstroke slope can be 2 °～20 °.Compare with known following continuous-flow type structure running gate system, the present invention has the following advantages: (1) can guarantee that gas discharges smoothly; (2) have stronger current stabilization, cushioning effect; (3) strengthened the pushing off the slag ability of cross gate; (4) remove the buffering whirlpool, not only made casting sand mold simple in structure, eliminated the defective that may occur in the foundry goods simultaneously, obviously improved the quality of foundry goods.

Description

A kind of novel continuous-flow type running gate system that goes up

The invention belongs to the technical field of part relevant in the casting and molding technology with pouring into motlten metal.

The design of running gate system is a most important ring in the casting Technology Design, and running gate system reasonable in design not only can improve casting quality, also can enhance productivity and reduces casting cost.Known running gate system can be divided into: a) teeming formula; B) sprue; C) bottom filling; D) clearance type; E) six classes such as combined type.Fig. 1,2 is a casting sand mold schematic diagram, and wherein Fig. 1 is a side view, and Fig. 2 (I) is a vertical view, and it comprises: (1) cup; (2) sprue; (3) buffering whirlpool; (4) cross gate; (5) buffering whirlpool; (6) ingate; (7) part such as rising head, its cross gate of common running gate system is the front end height, the rear end is low, is " following flowing water " formula structure.Fig. 2 (II) (III) is respectively A-A, the B-B sectional view of cross gate (4) and ingate (6).But adopt above-mentioned " following flowing water " formula structure running gate system, be difficult to avoid foundry goods defectives such as casting, shrinkage porosite, shrinkage cavity, pin hole and oxide slag inclusion to occur owing.

The invention provides a kind of novel running gate system, it partly is made up of cup, sprue, cross gate and ingate etc., it is characterized in that the arrival end of cross gate is low than the port of export, promptly presents continuous-flow type cast structure.Upward its ingate of continuous-flow type running gate system provided by the present invention also can be an ascending manner.Be horizontal detour and the ingate front end is the low continuous-flow type structure of all presenting than the rear end.In the last continuous-flow type running gate system, data such as the upstroke slope of cross gate (comprising ingate) can be between 2 °～20 °, and its technological parameter will be looked casting weight, cross gate length and difference.

The continuous-flow type running gate system that goes up provided by the present invention is with the known continuous-flow type running gate system down following advantage of having compared:

(1) can guarantee the bottom-up smooth discharge of gas;

(2) have stronger current stabilization, cushioning effect;

(3) strengthened the pushing off the slag ability of cross gate;

(4) removed buffering whirlpool (3), (5) so not only make casting sand mold simple in structure, simultaneously can avoid producing in the casting process eddy current.

Thereby go up the quality that the continuous-flow type running gate system can obviously improve foundry goods, eliminate the defectives such as shrinkage porosite, shrinkage cavity, pin hole and oxide slag inclusion that may occur in the foundry goods.

A kind of novel last its structural representation of continuous-flow type running gate system provided by the present invention is shown in Fig. 3,4, and Fig. 3 is a side view, and Fig. 4 (I) is a vertical view.In Fig. 3,4(I) in (1) be cup, (2) are sprue, (4) cross gate, (6) ingate, (7) rising head, (8) rising head seat, Fig. 4 (II) (III) be respectively cross gate (4) and ingate (6) along A-A, B-B direction sectional view.A horizontal line in the sectional view represents that running channel is acclivitous.

Expression is a unchoked running system among Fig. 3,4, for simplicity, the ingate that only draws, it is connected as a single entity with cross gate.The as can be seen from Figure 3 upstroke slope of cross gate and ingate.

Introduce embodiments of the invention below in conjunction with accompanying drawing 3,4:

Embodiment 1, continuous-flow type running gate system casting A0939 fuel tank cap in the employing, and this fuel tank cap material is ZHP _59-1Brass, every heavy 50 kilograms, it emits salty 20 kilograms, if adopt existing running gate system to be difficult to guarantee its casting quality, for example: cross gate differs 55 millimeters with the buffering whirlpool, even descended screen pack, still being difficult to control the higher impurity of the spread enters in the die cavity, and only dwindle the cross gate and the discrepancy in elevation (as be contracted to 5 millimeter) of buffering between the whirlpool, though situation can slightly be improved, buffering zone, whirlpool still can produce eddy current, impurity is entered go to use instead the continuous-flow type running gate system that goes up provided by the utility model in the die cavity, promptly press Fig. 3,4 designs, cancelled first buffering whirlpool, by cup (1), sprue (2) directly connects cross gate (4) and ingate (6), and corresponding cancelled second the buffering whirlpool (5), make cross gate and ingate be a slope of rising, the gradient is 20 °, and situation is greatly taken on a new look, eliminate the issuable various defectives of foundry goods fully, improved the casting quality of foundry goods significantly.

Embodiment 2, safe valve gap C ₅₉₃₆, its material is the ZL104 aluminium alloy, in process of production, adopt former flowing water running gate system down, settled screen pack,, and foundry goods has been scrapped still because of occurring oxide slag inclusion in the foundry goods, adopt last continuous-flow type running gate system as shown in Figure 2, cross gate (4) upstroke slope is taken as 12 °, and typing is stablized when then making the aluminium alloy cast significantly, does not produce eddy current, splash and impact, the result has improved casting quality greatly.

Must be pointed out that the continuous-flow type running gate system that goes up provided by the present invention is easy to apply industrial, it is suitable for the foundary industry in hand moulding and coremaking, also is suitable for the foundary industry of machine molding and coremaking, is particularly suitable for the casting of non-ferrous alloy.For non-ferrous alloy, continuous-flow type running gate system technological parameter roughly can design by table 1 on it:

Table 1

Foundry goods gross weight (kg)	1－10	10－25	25－50
				Cross gate long (mm)	75－90	90－180	180－240
The cross gate two ends discrepancy in elevation (mm)	2－5	5－10	10－15
				Upstroke slope (°)	2－6	6－12	12－20
The ingate upstroke slope (°)	1－3	3－6	6－10

Claims

1, a kind of running gate system of being made up of cup (1), sprue (2), cross gate (4), ingate (6) is characterized in that its cross gate and ingate front end are low than the rear end, promptly present the continuous-flow type structure.

2, by the described running gate system of claim 1, the upstroke slope that it is characterized in that said cross gate (comprising ingate) is 2 °～20 °.