CN208452076U - A kind of epoxy casting exempts from teeming mold - Google Patents

Abstract

The utility model discloses a kind of epoxy castings to exempt from teeming mold, including die main body, and die main body cover board top surface is equipped with groove, and the groove floor is equipped with several through holes.The utility model has the characteristics that degasifying effect is good, resin initial solidification is disposably completed, demoulds easy, product good insulation preformance and energy conservation.

Description

A kind of epoxy casting exempts from teeming mold

Technical field

The utility model relates to a kind of epoxy castings to exempt from teeming mold, belong to note and pour technical field of mold.

Background technique

For epoxy casting transformer mostly using vacuum pouring technology, i.e. product is the vacuum in vacuum tank at present Be poured under state, mold is provided with plug hole and gas vent, such as Fig. 3 in upper cover, shown in Fig. 4: a hole (A) is for pouring loop Oxygen mixture, another hole (B) are used for the gas being discharged in mold；After mold pours completely, it is further continued for carrying out in tank true in short-term Sky degassing, in the vacuum outgas stage, the bubble in mixture of epoxy resins can only be from only there are two being discharged in hole, then releasing is true It dallies and carries out initial solidification in baking oven.During initial solidification after the completion of poured with epoxy resin, with epoxy resin material The further evolution for not taking off clean residual bubble with vacuum outgas in casting process is further permeated into mutual inductor body, In addition the shrinkage phenomenon in Curing Process of Epoxy, epoxy resin liquid level can sink in mold, at this moment just need to carry out teeming, Resin is filled it up with, just can guarantee the complete of product shape in this way, this just needs to pull out product into carry out two from high temperature oven Secondary teeming.In summary: the shortcomings that traditional moulds, is:

1, only there are two holes to concentrate discharge bubble when vacuum outgas, from the plug hole local more difficult abjection of bubble farther out, shadow Degasifying effect is rung, product appearance and quality are influenced；

2, teeming will just can be carried out by the long period in epoxy resin cure retrogradation to a certain extent, the material that teeming is entered Solidification is re-started, curing time is increased；

3, the mixture containing bubble and impurity of teeming can sink to product mold lower part under non-vacuum, influence vacuum It is poured effect, to influence the insulation performance of product；

4, thermal energy can be lost when product is taken out from high temperature oven and carries out teeming, causes energy waste；

5, when resin mixture liquid level sinks more in mold, because teeming is not vacuum pouring, bubble is inevitably had It is difficult to exclude, influences product insulation performance；

6, due to teeming material it is general it is fewer cannot vacuum ingredient again, being that same batch casting is remaining added promotor Resin mixture, the time it is long can retrogradation, be also unfavorable for bubble discharge；

7, cast gate is bigger, must polish after solidification, needs special polishing workshop and tool, causes environmental pollution, shadow Ring worker's health；

8, increase labor intensity of workers and time cost.

Summary of the invention

Technical problem to be solved by the utility model is to provide a kind of degasifying effects well, resin initial solidification is primary Property complete, demoulding is easy, product good insulation preformance and energy-efficient epoxy casting exempt from teeming mold.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

A kind of epoxy casting exempts from teeming mold, including die main body, and die main body cover board top surface is equipped with groove, institute Groove floor is stated equipped with several through holes.

The groove covers die main body cover board top surface, and the through hole is evenly distributed on the groove floor.

The depth of groove is 10-15mm.

The through hole internal diameter from top to bottom reduces.

The through hole is taper.

It further include the observation window being arranged on the die main body cover board.

The utility model it is achieved the utility model has the advantages that

1, it is provided with the aperture that (interior) small upper (outer) is big under many equally distributed penetrability on subsidence trough bottom surface, works as production When product carry out vacuum casting and vacuum outgas, bubble can be deviate from from equally distributed aperture, since aperture is more and equal Even to be distributed on entire cover board, degasifying effect is fine；

2, the time that resin retrogradation waits before teeming, resin initial solidification one-time-reach-place have been saved；

3, will not occur to sink to due to the material of handing in retroactively containing bubble and impurity and have passed through vacuum pouring and vacuum outgas produces In the mixture of product lower part, product insulation performance is influenced；

4, it will not occur to take the link for carrying out teeming outside high temperature oven due to product, avoid loss thermal energy, cause energy Source waste；

5, will not occur due to the more situation of resin mixture liquid level sinking in mold, there is no what is be poured under atmosphere Link will not generate resulting bubble, thus the case where influencing product insulation performance；

6, it will not occur using adding the mixture of epoxy resins of the longer retrogradation of promotor mixing time, and influence in product The discharge of bubble；

7, demoulding is easy, due to aperture (such as taper) bottom area very little, it is easy to be fallen by shovel, use perching knife after taking off cover board It evens smaller protrusion out, is then demoulded, do not have to polish after demoulding, avoid environmental pollution and influence worker's body Health, while also greatly reducing labor intensity；

8, it due to not needing to take out baking oven progress feed supplement, so initial solidification can realize continuous tunnel furnace, is carried out by beat continuous Solidification, greatly improves degree of automation and efficiency.

Detailed description of the invention

Fig. 1 is the utility model main view；

Fig. 2 is the utility model top view；

Fig. 3 is existing casting mold main view；

Fig. 4 is existing casting mold top view.

Specific embodiment

The utility model is further described with reference to the accompanying drawing.Following embodiment is only used for clearly illustrating this The technical solution of utility model, and cannot be used as a limitation the limitation protection scope of the utility model.

By taking casting transformer mold as an example, as shown in Fig.1 and Fig.2, a kind of epoxy casting exempts from teeming mold, including mold master Body 1,1 cover board top surface of die main body are equipped with a groove 2 that can cover cover board top surface substantially and an observation window 4, groove 2 Bottom surface is up big and down small equipped with several perforation bellmouth 3(are evenly distributed with), groove 2 has certain depth 10-15mm, for accommodating A certain amount of resin.

When product carries out vacuum casting and vacuum outgas, bubble can be deviate from from equally distributed bellmouth 3, by More in bellmouth 3 and be evenly distributed on entire cover board, degasifying effect is fine, should form surface of subsidence in vacuum casting Groove 2 in pour it is full.The resin that product has more in die cover plate subsidence trough 2 and bellmouth 3 in post cure processes can compensate Since epoxy resin material is further permeated into mutual inductor body, vacuum outgas does not take off clean residual bubble ease in casting process It is out with the sinking situation of epoxy resin liquid level in mold caused by the contraction in epoxy resin cure, i.e., disposable to complete Initial solidification does not need subsequent teeming, direct demoulding after solidification, since 3 bottom area of conical bore is small, it is easy to and shovel falls to even out, It does not need to polish after demoulding, significantly reduce production process and reduces labor intensity, by the use of the present apparatus, a batch can be made The process time of product shortens 3 hours, and separate unit can save working hour 30 minutes, avoids polishing dust to the pollution of environment and to worker The influence of health most importantly substantially increases the insulation performance of product, it is specified that the shelf depreciation under voltage is by original 50pC be reduced to 10pC hereinafter, even there is the product of significant proportion under the industrial frequency withstand voltage that no partial discharge requires, can all accomplish Without shelf depreciation, there are excellent economic and technical norms.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvement and deformations can also be made, these change It also should be regarded as the protection scope of the utility model into deformation.

Claims (6)

1. a kind of epoxy casting exempts from teeming mold, including die main body (1), characterized in that die main body (1) the cover board top surface It is equipped with groove (2), groove (2) bottom surface is equipped with several through holes (3).

2. a kind of epoxy casting according to claim 1 exempts from teeming mold, characterized in that described in groove (2) covering Die main body (1) cover board top surface, the through hole (3) are evenly distributed on the groove (2) bottom surface.

3. a kind of epoxy casting according to claim 1 exempts from teeming mold, characterized in that groove (2) depth is 10- 15mm。

4. a kind of epoxy casting according to claim 1 exempts from teeming mold, characterized in that through hole (3) internal diameter by Up to lower reduction.

5. a kind of epoxy casting according to claim 4 exempts from teeming mold, characterized in that the through hole (3) is taper.

6. a kind of epoxy casting according to claim 1 exempts from teeming mold, characterized in that further include being arranged in the mold Observation window (4) on main body (1) cover board.