CN203077540U

CN203077540U - Structure of liquid silica gel injection mould

Info

Publication number: CN203077540U
Application number: CN 201220572671
Authority: CN
Inventors: 张绍华; 周永峰; 钟华钻; 唐臻; 赖愈华
Original assignee: Janus Dongguan Precision Components Co Ltd
Current assignee: Janus Dongguan Precision Components Co Ltd
Priority date: 2012-11-01
Filing date: 2012-11-01
Publication date: 2013-07-24
Anticipated expiration: 2022-11-01

Abstract

The utility model provides a structure of a liquid silica gel injection mould. The structure comprises a back mould core fixedly arranged on a back mould plate and a front mould core fixedly arranged on a front mould plate, wherein an insulation board is arranged around the back mould core, a pressure block is arranged on the parting surface of the back mould core, the back mould core is internally provided with an embedding piece, a top block and a silica gel cold runner workpiece, the back mould plate, the back mould core and the embedding piece are respectively and internally provided with a heating rod, insulation paper is arranged at the place at which the top of the silica gel cold runner workpiece leans against the embedding piece and the back mould core, and a silica gel forming cavity is formed between the embedding piece, the back mould core and a plastic structural part which needs to be injected with silica gel. After the structure of the liquid silica gel injection mould provided by the utility model is used, a cold runner low-temperature region and a silica gel-formed high-temperature region in the silica gel cold runner workpiece are separated from each other, so that the problem of the productivity reduction caused by overlong silica gel ring vulcanizing time since the temperature of the silica gel cold runner region is lower can be avoided, the temperature evenness of the high-temperature region can be guaranteed, and the deformation problem caused by larger temperature difference can be avoided.

Description

A kind of liquid-state silicon gel injection mold structure

Technical field

The utility model relates to a kind of liquid-state silicon gel injection mould structure.

Background technology

Existing battery series products waterproof technique normally utilizes modes such as gluing is bonding, ultra-sonic welded, on groove on the plastic cement structural member or muscle position, a circle silica gel water proof ring is set, or utilizes plastic cement to add the method for TPU dual-color forming, finally reaches the purpose of waterproof.But modes such as gluing is bonding, ultra-sonic welded, because the intermediate demand manual operations, the precision of its assembling, stability can't guarantee that waterproof effect is also bad.And plastic cement adds the waterproof type of TPU dual-color forming, can only reach 60 degree because the existing hardness of TPU material is minimum on the one hand, and the classification of waterproof of shaped article has bigger restriction; On the other hand, more far short of what is expected though the flowability of TPU material is better than common plastic material than liquid-state silicon gel, so water repellent area is big, and when the waterproof sectional dimension was little, TPU can't completely fill, and this also is a bottleneck of this kind technology.

Now advanced mode is that liquid-state silicon gel adds moulding of plastic cement quadric injection mould or dual-color forming, its waterproof precision height, and dimensionally stable, and be easy to realize large-scale automatic mass.Need very high temperature but liquid-state silicon gel vulcanizes in mould, when temperature was low, cure time was very long and cause there is not production; And the plastic cement hear resistance is limited, when temperature is too high plastic cement yielding, weigh wounded, the yield of product is very low, also can't carry out volume production.

The utility model content

For overcoming the problem of the deficiencies in the prior art and existence, the utility model provides a kind of cold and hot collision problem that carries out the injection mo(u)lding of secondary liquid silica gel in type plastic cement structural member, avoid liquid-state silicon gel and plastic cement, shortens the liquid-state silicon gel injection mould structure of molding cycle.

The utility model is achieved through the following technical solutions:

A kind of liquid-state silicon gel injection mold structure, comprise back die that is fixed on the rear pattern plate and the preceding die that is fixed on the front template, side is provided with thermal insulation board around the die of described back, and back die die joint is provided with pressure block, and back die inside is provided with mold insert, jacking block and silica gel cold runner product; Described mold insert and back die with need formation silica gel moulding die cavity between the plastic cement structural member of injection moulding silica gel.

Be equipped with heating bar in described rear pattern plate, back die and the mold insert, silica gel cold runner product top and mold insert and the die place of offseting, back are provided with sheathing paper.

Described jacking block is between mold insert, and jacking block is a T-shaped, and fastens with the both sides mold insert.

Described mold insert is fixed on the rear pattern plate by screw lock with the back die.

The sprue of described silica gel cold runner product is located at mold insert and back die binding face place.

Described heating bar is the heating bar that carries temperature sense line, every group of independent temperature control.

The utility model compared with the prior art, simple and reasonable, sheathing paper is established in silica gel cold runner product top and mold insert and the die place that offsets, back, the high-temperature area of cold runner low-temperature region in the silica gel cold runner product and silica gel moulding is separated by comes, avoided silica gel cold runner regional temperature lower and make long and the problem that production capacity is reduced of silica gel circle cure time; The set thermal insulation board of side effectively separates back die and mold base temperature around the back die, reduced heat transfer, also be provided with heating bar on the rear pattern plate of back die below simultaneously, the heat that has guaranteed whole die, mold insert like this is abundant, temperature is even, when obtaining shorter molding cycle, can effectively prevent the problem on deformation that silica gel produces greatly because of the temperature difference; Also be provided with heating bar on back die and the mold insert, silica gel is carried out two-sided heating, shortened the time of silica gel sulfuration greatly.

Description of drawings

Fig. 1 is the utility model overall structure schematic diagram;

Fig. 2 is the utility model internal structure transverse sectional view;

Fig. 3 is the utility model internal structure longitudinal sectional view.

Among the figure: 1-rear pattern plate, die behind the 2-, 3-plastic cement structural member, 4-thermal insulation board, 5-heating bar, 6-pressure block, 7-mold insert, 8-jacking block, 9-silica gel cold runner product, 10-silica gel moulding die cavity, 11-push rod, 12-sheathing paper.

The specific embodiment

Understanding for the ease of those skilled in the art describes in further detail the utility model below in conjunction with accompanying drawing.Should be pointed out that specific embodiment described herein only is used to explain the utility model, and be not used in qualification the utility model.

Shown in accompanying drawing 1,2,3, a kind of liquid-state silicon gel injection mold structure comprises back die 2 that is fixed on the rear pattern plate 1 and the preceding die that is fixed on the front template, and side is provided with thermal insulation board 4 around the die 2 of described back, back die 2 is effectively separated with the mold base temperature, reduced heat transfer; Back die 2 die joints are provided with pressure block 6, avoid plastic cement structural member 3 surfaces to weigh wounded during matched moulds; Back die 2 inside are provided with mold insert 7, jacking block 8 and silica gel cold runner product 9, and described jacking block 8 is between mold insert 7, and jacking block is a T-shaped, and fasten with both sides mold insert 7, in the demoulding, push rod 11 pulling jacking blocks 8, pulling simultaneously and the mold insert 7 that jacking block 8 fastens once get final product the demoulding.The sprue of described silica gel cold runner product 9 is located at mold insert 7 and die 2 binding face places, back, at binding face sprue being set makes processing more convenient, silica gel cold runner product 9 tops and mold insert 7 and die 2 places of offseting, back are provided with sheathing paper 12, mold insert 7 and back die 2 and need formation silica gel moulding die cavity 10 between the plastic cement structural member 9 of injection moulding silica gel.Sheathing paper 12 is separated by the high-temperature area of cold runner low-temperature region in the silica gel cold runner product 9 and silica gel moulding and is come, and has avoided silica gel cold runner regional temperature lower and make long and the problem that production capacity is reduced of silica gel circle cure time.Described mold insert 7 is fixed on the rear pattern plate 1 by screw lock with back die 2, be evenly distributed with heating bar 5 in described rear pattern plate 1, back die 2 and the mold insert 7, described heating bar 5 is for carrying the heating bar of temperature sense line, every group of independent temperature control, equally distributed heating bar 5 has guaranteed that the heat of whole die 2, mold insert 7 is abundant on the rear pattern plate 1, temperature is even, when obtaining shorter molding cycle, can effectively prevent the problem on deformation that silica gel produces greatly because of the temperature difference; 5 pairs of silica gel of heating bar on back die 2 and the mold insert 7 carry out two-sided heating simultaneously, have also shortened the time of silica gel sulfuration greatly.

The content of mentioning in the foregoing description is not to be to qualification of the present utility model, and under the prerequisite that does not break away from utility model design of the present utility model, any conspicuous replacement is all within protection domain of the present utility model.

Claims

1. liquid-state silicon gel injection mold structure, comprise the back die (2) that is fixed on the rear pattern plate (1) and be fixed on preceding die on the front template, it is characterized in that: described back die (2) side all around is provided with thermal insulation board (4), back die (2) die joint is provided with pressure block (6), and back die (2) inside is provided with mold insert (7), jacking block (8) and silica gel cold runner product (9);

Described mold insert (7) and back die (2) with need formation silica gel moulding die cavity (10) between the plastic cement structural member (3) of injection moulding silica gel.

2. liquid-state silicon gel injection mold structure according to claim 1, it is characterized in that: be equipped with heating bar (5) in described rear pattern plate (1), back die (2) and the mold insert (7), silica gel cold runner product (9) top and mold insert (7) and die (2) place of offseting, back are provided with sheathing paper (12).

3. liquid-state silicon gel injection mold structure according to claim 2 is characterized in that: described jacking block (8) is positioned between the mold insert (7), and jacking block (8) is a T-shaped, and fastens with both sides mold insert (7).

4. liquid-state silicon gel injection mold structure according to claim 3 is characterized in that: described mold insert (7) is fixed on the rear pattern plate (1) by screw lock with back die (2).

5. liquid-state silicon gel injection mold structure according to claim 4 is characterized in that: the sprue of described silica gel cold runner product (9) is located at mold insert (7) and die (2) binding face place, back.

6. liquid-state silicon gel injection mold structure according to claim 5 is characterized in that: described heating bar (5) is for carrying the heating bar of temperature sense line, every group of independent temperature control.