CN208697792U - A kind of hollow O-ring seal moulding process mold of fused salt mandrel molding - Google Patents
A kind of hollow O-ring seal moulding process mold of fused salt mandrel molding Download PDFInfo
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- CN208697792U CN208697792U CN201820533864.3U CN201820533864U CN208697792U CN 208697792 U CN208697792 U CN 208697792U CN 201820533864 U CN201820533864 U CN 201820533864U CN 208697792 U CN208697792 U CN 208697792U
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Abstract
The utility model discloses a kind of hollow O-ring seal moulding process mold of fused salt mandrel molding.The core model is obtained by following steps: salt is uniformly mixed after weighing proportionally, uniformly mixed salt begins heat to fusing from room temperature, heat preservation 5-10 minutes, molding die is preheated in an oven, temperature is set as 110 DEG C -120 DEG C, after temperature reaches, salt melt after fusing is poured into preheated molding die and formed by heat preservation a period of time, cooling, take out fused salt core model, finishing.Gained fused salt core model shape and the hollow cavity of hollow O-shaped sealing ring match, and are the molding auxiliary moulds of hollow O-shaped sealing ring.The utility model further provides the molding die of fused salt core model.Man hour of labour can be substantially reduced using the fused salt core model manufacture hollow O-shaped sealing ring of the utility model, enhances the stability of technique and product, improves production efficiency, reduce cost.
Description
Technical field
The utility model belongs to sealing element processing technique field, and in particular to a kind of to be used to prepare hollow O-ring seal
The mold of fused salt core model.
Background technique
Hollow O-shaped sealing ring is the sealing ring that the hollow section of one kind is O shape, it belongs to contact seal self-sealing compression
One of shape sealing form sealing.O-ring seals have the advantage that individual pen is two i.e. salable compared with other sealing rings
The pressure in direction, sealed reliable can accomplish not reveal when for static seal；It is small in size, light weight and cost is low；Seal member
Structure is simple, is convenient to mount and dismount, and does not have to periodically adjustment；Kinetic frictional resistances are small；It can be used for fixed static seal, it can also be used to
Reciprocating or rotary motion dynamic sealing；The size of O-ring seals, shape, size, the processing essence of various seal grooves
The requirement such as degree, fit tolerance, can be facilitated selection, spare part is easily solved by standard.
And hollow O-shaped sealing ring because sealing ring be it is hollow, bigger compression can also be generated compared to other O-ring seals
Amount, and resistance to wide temperature range, are mainly used for the sealing of some special equipments.The formation of hollow O-shaped sealing ring hollow space is main
Using inflation sulfidization molding, first preforming required embryo material is put into mold, after molding, is passed through compressed air in hollow cavity
After vulcanized, whole process speed is slow, production efficiency is low, large labor intensity, production procedure is cumbersome, is unfavorable for producing in batches,
After vulcanization, faying face is easy to crack, leads to very high defect rate, unstable quality.
In order to reduce manufacture hollow O-shaped sealing ring needed for man hour of labour, enhance technique and product stability, improve production
Efficiency, reduces cost, the utility model develop a kind of fused salt core model for being used to prepare hollow O-ring seal moulding process,
Fused salt core model and its mold.
Utility model content
For the deficiency in the prior art in production empty O-ring seals, one of the utility model is designed to provide
A kind of hollow molding fused salt core model of O-ring seal of auxiliary.Another of the utility model is designed to provide the fused salt core
The mold of mold forming.
Using the hollow O-shaped sealing ring moulding process of fused salt core model described in the utility model, comprising: pre-molding O shape is close
Then the top half of seal and lower half portion are put into fused salt core model, molding vulcanization, the rubber after taking out vulcanization between the two sections
Glue product produces fabrication hole in product side, and into the water by product, salt obtains complete hollow after fabrication hole is dissolved in water
O-ring seals.
Specifically, using the hollow O-shaped sealing ring moulding process of fused salt core model described in the utility model, comprising steps of
A. by the upper mold 8 of hollow O-shaped sealing ring and the first preforming mould A pre-molding top half at normal temperature, precompressed
Time 30 ± 5 seconds, then preforming mould A is removed, is retained in rubber part in the upper mold 8 of hollow O-shaped sealing ring.
B. by the pre-molding lower half portion at normal temperature the lower die 9 of hollow O-shaped sealing ring and the second preforming mould B, precompressed
Time 30 ± 5 seconds, then preforming mould B is removed, is retained in rubber part in the lower die 9 of hollow O-shaped sealing ring.
C. fused salt core model 10, molding vulcanization are put among the preforming good lower half portion rubber of step B.
D. it takes out the hollow O-shaped sealing ring product with fused salt core model and fabrication hole 7 is made with the formed punch of corresponding size.
E. into the water by the hollow O-shaped sealing ring product with fused salt core model, by fabrication hole 7, keep salt gradually complete
It is dissolved into water, obtains complete hollow O-shaped sealing ring.
Above-mentioned moulding process can be used for manufacturing hollow O-shaped sealing ring of various shapes, including but not limited to round, square
Shape etc..
The above-mentioned hollow O-shaped sealing ring moulding process using fused salt core model, the size of the fabrication hole is according to product cross section
Size is formulated, usually the 1/6 ~ 1/4 of sealing ring cross diameter.Fabrication hole is big, and dissolved salt speed is fast, shortens the production time, still
The compression performance that may influence sealing ring causes leakproofness poor；Fabrication hole is small, and dissolved salt speed is slow, but influences on leakproofness small.Institute
The considerations of shape for stating fabrication hole is unlimited, for beauty and facilitates processing, is made as round hole more.
The product for having made fabrication hole is put into hot water, salt dissolves more rapidly.
A kind of hollow O-shaped sealing ring can be obtained by above-mentioned moulding process, the side of the sealing ring has fabrication hole,
The size of the fabrication hole is formulated according to product cross section size, usually the 1/6 ~ 1/4 of sealing ring cross diameter.This band technique
The hollow O-shaped sealing ring in hole, fabrication hole do not influence the sealing performance of sealing ring, and make the hollow space of sealing ring and extraneous phase
It is logical, in the moulding process of the utility model, complete hollow O-shaped can be obtained by simple dissolving salt core process and seal
Circle.Preparation step is more simple, quick compared with inflating sulfidization molding.And be dissolved into the salt in water can with recycling and reusing,
It is economic and environment-friendly.
The material of hollow O-shaped sealing ring, which can according to need, to be selected, and the preferable silicon rubber of mold filling character, fluorine silicon are suitable for
Rubber, ethylene propylene diene rubber, nitrile rubber.Therefore, the hollow O-shaped of different purposes and performance can be obtained by the selection of material
Sealing ring.
The utility model provides a kind of fused salt core model, the fused salt core model for above-mentioned hollow O-ring seals moulding process
It is formed by salt melting and solidification, shape and the hollow cavity of hollow O-shaped sealing ring match.In use, fused salt core model experience two
Kind state, in molding sulfidation, in shape solid shape identical with the hollow cavity of hollow O-shaped sealing ring, vulcanization punching
After hole is placed in water, in the form of being dissolved in the water.
Further, the shape of above-mentioned fused salt core model is annulus.
It is preferred that the diameter of the annulus is 4 ~ 12mm.
Further, melting and solidification is the mixed of mass ratio 45-55:55-45 sodium nitrate and potassium nitrate at the salt of fused salt core model
Close object.
Further, the proportion of sodium nitrate and potassium nitrate is mass ratio 1:1 in above-mentioned fused salt core model.Under the ratio,
Molding fused salt core model compactness, release property are good, and when pickup is not easy to crack.
The preparation method of the fused salt core model for hollow O-shaped sealing ring moulding process of the utility model, comprising: weigh
Then salt is melted at high temperature, the salt melt after fusing is poured into preheated mold and is formed, cooling, is taken out.
Further, the above-mentioned method for preparing fused salt core model, specifically includes:
1) salt is uniformly mixed after weighing proportionally；
2) uniformly mixed salt is begun heat into fusing from room temperature, keeps the temperature 5-10 minutes；
3) molding die is preheated in an oven, temperature is set as 110 DEG C -120 DEG C, after temperature reaches, heat preservation one
The section time；
4) salt melt after fusing preheated molding die is poured into form, it is cooling；
5) fused salt core model, finishing are taken out.
One specific embodiment of the utility model is molten using the sodium nitrate and potassium nitrate preparation of mass ratio 45 ~ 55:55 ~ 45
Salt core model, step include:
1) 45 ~ 55:55 in mass ratio ~ 45 weighs sodium nitrate and potassium nitrate, is uniformly mixed；
2) mixture that step 1) obtains is begun to warm up from room temperature, heating temperature sets 300 DEG C ~ 310 DEG C, keeps the temperature 5-10
Minute；
3) molding die is preheated in an oven, temperature is set as 110 DEG C -120 DEG C, after temperature reaches, heat preservation 30
Minute or more, it is ensured that molding die is heated evenly；
4) salt melt after fusing preheated molding die is poured into form, it is cooling.
5) it takes out and modifies fused salt core model.
The serial number of above step is only more coherent statement, rather than limits sequencing, each under the premise of reconcilable
Step after serial number can be interchanged or carry out simultaneously, and those skilled in the art can be adjusted according to physical condition.
For being technique that 1:1 sodium nitrate and potassium nitrate prepare fused salt core model, the temperature setting mistake of step 3) with mass ratio
It is low, it will lead to salt melt and the molding die temperature difference be too big, product after molding is cracked, and temperature is too high, goes out after formed product
Existing powdery, it is not easily molded.
Further, above-mentioned steps 4) at the time of molding, molding die is kept in an oven.Ensure to be poured in an oven
Molding reduces influence molding effect mainly for preventing molding die temperature quickly.After moulding by casting, oven door is closed, is turned off
Baking oven heater switch stops heating.It allows and has been poured molding die natural cooling 10-15 minutes in an oven of salt melt.
After cooling down in an oven, molding die is taken out, is placed under room temperature environment, it is 10-15 minutes cooling, then prized with copper label
Fall the fused salt of sprue gate and exhaust outlet, then gently beat molding die edge, takes out fused salt core model.
Modifying fused salt core model is mainly that the sprue gate on its surface is whole, smooth with blade equating.
The utility model additionally provides a kind of hollow O-ring seal moulding process mold of fused salt mandrel molding, institute
Stating mold includes upper mold 1 and lower die 2 arranged up and down, and the downside of upper mold 1 is equipped with upper cavity 3, and the upper side of lower die 2 is equipped with down
Die cavity 4, the upper cavity 3 and lower mode cavity 4 are corresponding, and ring-like chamber is complemented each other to form under molding state, the upside of upper mold 1
Face is respectively equipped with the sprue gate 5 communicated with upper cavity 3 and exhaust outlet 6, the hollow cavity phase of the type chamber and hollow O-shaped sealing ring
Matching.
Further, the above-mentioned hollow O-ring seal moulding process mold of fused salt mandrel molding, the sprue gate 5
Greater than φ 2mm, the size at the preferably described sprue gate 5 is 2 mm of φ ~ φ 3mm.Sprue gate is mainly used for the salt melt after melting
It pours into mold, because the mobility of fuse salt is poor and can quickly solidify to the cold, therefore sprue gate cannot be too small, typically larger than φ
2mm。
Exhaust outlet 6 is mainly used for air when casting in discharge type chamber, as needed, can open up 2-3.
The utility model uses the hollow O-shaped sealing ring moulding process and traditional inflation sulfidization molding technique of fused salt core model
It compares, has the advantage that moulding process is simple and reliable, be suitable for mass production；It is smooth that rear rubber product hollow wall is made；
Product uniform wall thickness.Inflate sulfidization molding after inner wall it is rough, especially for the higher product of wall thickness dimension required precision without
Method guarantees, faying face is easy to cause to crack.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the molding die of the utility model fused salt core model；
Fig. 2 is the schematic cross-section of the utility model fused salt core model；
Fig. 3 is hollow O-shaped sealing ring cross-section with fabrication hole of the utility model using the preparation of fused salt mandrel molding technique
Schematic diagram；
Fig. 4 is the utility model embodiment precompressed O-ring seals top half operation chart；
Fig. 5 is the structure chart after the utility model embodiment precompressed O-ring seals top half；
Fig. 6 is the utility model embodiment precompressed O-ring seals lower half portion operation chart；
Fig. 7 is the structure chart behind the utility model embodiment precompressed O-ring seals lower half portion；
Fig. 8 is that the utility model embodiment is put into fused salt core model, the structure chart after molding；
Fig. 9 is the hollow O-shaped sealing ring schematic cross-section with fused salt core model after the utility model embodiment demoulding.
In figure, 1 is upper mold, and 2 be lower die, and 3 be upper cavity, and 4 be lower mode cavity, and 5 be sprue gate, and 6 be exhaust outlet, and 7 be technique
Hole, 8 be hollow O-shaped sealing ring upper mold, and 9 be hollow O-shaped sealing ring lower die, and 10 be fused salt core model.
Specific embodiment
It is further described in conjunction with content of the attached drawing to the utility model.
A kind of hollow O-shaped sealing ring, the side of the sealing ring have fabrication hole, and the diameter of the fabrication hole is that sealing ring is horizontal
The 1/6 ~ 1/4 of cross-sectional periphery length.Such sealing ring has the decrement bigger than common O-ring seals because hollow；Tool
Have the hollow O-shaped sealing ring of fabrication hole, due to fabrication hole after sulfidization molding into the water, can flow liquid into, such as water
Inflow can promote hollow inner salt matter dissolution, obtain complete sealing ring.It is therefore possible to use fused salt core model assists its molding.With
Inflation sulfidization molding compare, more convenient, quick, high quality, efficiently.
Fig. 3 illustrates the hollow O-shaped sealing ring with fabrication hole of the utility model one embodiment, and 7 be fabrication hole.
One kind being used for the molding fused salt core model of hollow O-shaped sealing ring, is formed by salt melting and solidification, shape is close with hollow O-shaped
The hollow cavity of seal matches.Fused salt core model is the auxiliary mould in hollow O-shaped sealing ring moulding process, is set when for molding
Above and below the O-ring seals between two parts.
In some embodiments of the utility model, because the hollow cavity of hollow O-shaped sealing ring is annular shape, accordingly
Ground, the shape of fused salt core model are also matched annulus.It is preferred that the diameter of the annulus is 4 ~ 12mm.
It is solid-state that the salt of production fused salt core model, which should meet under room temperature to sealing ring material curing temperature, and in water under room temperature
In readily soluble requirement.
According to one preferred embodiment of the utility model, the salt that melting and solidification prepares fused salt core model is sodium nitrate and nitric acid
Potassium mass ratio is the mixture of 45-55:55-45.Especially mass ratio be 1:1 sodium nitrate and potassium nitrate mixture.
Fig. 2 illustrates a kind of fused salt core model of hollow O-shaped sealing ring moulding process for Fig. 3.
A kind of mold for fused salt mandrel molding, referring to Fig. 1, the mold includes upper mold 1 and lower die arranged up and down
2, the downside of upper mold 1 is equipped with upper cavity 3, and the upper side of lower die 2 is equipped with lower mode cavity 4, and the upper cavity 3 and lower mode cavity 4 are opposite
It answers, and complements each other to form ring-like chamber under molding state, the upper side of upper mold 1 is respectively equipped with the casting communicated with upper cavity 3
Mouth 5 and exhaust outlet 6.6 quantity of exhaust outlet is set as needed, and usually 2 ~ 3.
In some embodiments, sprue gate 5 is φ 2mm ~ φ 3mm.
A method of preparing the fused salt core model for hollow O-shaped sealing ring moulding process, comprising: weigh salt, then plus
Heat is melted at high temperature, and the salt melt after fusing is poured into preheated mold and is formed, cooling, is taken out.
In some embodiments, the above-mentioned method for preparing fused salt core model, specifically includes:
1) salt is uniformly mixed after weighing proportionally；
2) uniformly mixed salt is begun heat into fusing from room temperature, keeps the temperature 5-10 minutes；
3) molding die is preheated in an oven, temperature is set as 110 DEG C -120 DEG C, after temperature reaches, heat preservation one
The section time；
4) salt melt after fusing preheated molding die is poured into form, it is cooling；
5) fused salt core model, finishing are taken out.
One specific embodiment of the utility model prepares fused salt core model using the sodium nitrate and potassium nitrate of mass ratio 1:1,
Its step includes:
1) 1:1 in mass ratio weighs sodium nitrate and potassium nitrate, is uniformly mixed；
2) mixture that step obtains is begun to warm up from room temperature, heating temperature sets 300 DEG C ~ 310 DEG C, 5-10 points of heat preservation
Clock；
3) molding die is preheated in an oven, temperature is set as 110 DEG C -120 DEG C, after temperature reaches, heat preservation 30
Minute or more, it is ensured that molding die is heated evenly；
4) salt melt after fusing preheated molding die is poured into form, it is cooling.
5) it takes out and modifies fused salt core model.
A kind of hollow O-shaped sealing ring moulding process using fused salt core model, comprising: the upper half of pre-molding O-ring seals
Part, referring to fig. 4,5, then the lower half portion of pre-molding O-ring seals is put into fused salt referring to Fig. 6,7 between the two sections
Core model, molding vulcanization take out the rubber product after vulcanizing, produce fabrication hole in product side, product is put into water referring to Fig. 8
In, salt obtains complete hollow O-shaped sealing ring after fabrication hole is dissolved in water.
It is illustrated below by way of summary of the invention of the specific embodiment to the utility model is further, but should not be construed as this
The range of utility model is only limitted to example below, invention thinking according to the present utility model and entire contents, can will be following
Sequence in example is adjusted, and each technical characteristic makes combination/replacement/adjustment/modification appropriate etc., this is for this field skill
It is it will be apparent that still falling within the scope of the utility model protection for art personnel.
Embodiment 1
Referring to Fig. 1, a kind of mold for fused salt mandrel molding, including upper mold arranged up and down 1 and lower die 2, upper mold 1
Downside is equipped with upper cavity 3, and the upper side of lower die 2 is equipped with lower mode cavity 4, and the upper cavity 3 and lower mode cavity 4 are corresponding, and are closing
Ring-like chamber is complemented each other to form under mould state, the upper side of upper mold 1 is respectively equipped with the φ 2mm ~ φ 3mm's communicated with upper cavity 3
Sprue gate 5 and 2 ~ 3 exhaust outlet 6.
Embodiment 2
Hollow O-shaped sealing ring fused salt core model is prepared with the mold of embodiment 1, according to the following steps:
1) 1:1 in mass ratio weighs sodium nitrate and is mixed with potassium nitrate, it is ensured that is uniformly mixed.
2) mixed salt is put into crucible, is then placed in baking oven or other can be in the heating equipment of set temperature from room temperature
Start to be heated, heating temperature is set between 300 DEG C -310 DEG C, after temperature reaches, keeps the temperature 5-10 minutes.
3) while fused salt, molding die is preheated in an oven, temperature is set as 110 DEG C -120 DEG C, temperature
After degree reaches, heat preservation 30 minutes or more, it is ensured that molding die is heated evenly.
4) when reach the 1), 2) condition after, the salt melt after fusing is poured into molding die molding.In casting, molding
Mold cannot take out from baking oven, should be poured in baking oven, reduce mainly for preventing molding die temperature quickly.It is then shut off
Oven door turns off baking oven heater switch, stops heating.The molding die for being poured salt melt is allowed to cool down 10-15 points in an oven
Clock.
5) room temperature is cooling, takes out fused salt core model, after cooling down in an oven, molding die is taken out, is placed under room temperature environment,
After 10-15 minutes cooling, the fused salt at sprue gate and exhaust outlet is first fallen with copper label sled, molding die edge is then gently beaten, takes
Fused salt core model out.And it is the sprue gate on fused salt mandrel surface is whole, smooth with blade equating.Obtain fused salt core as shown in Figure 2
Mould.
Embodiment 3
For the fused salt core model of hollow O-shaped sealing ring moulding process, as shown in Fig. 2, by mass ratio be 1:1 sodium nitrate and
Potassium nitrate melting and solidification forms, and the hollow molded cavity of the hollow O-shaped sealing ring of shape and Fig. 3 matches, and is annulus, the annulus
Diameter is 4 ~ 12mm.
Embodiment 4
Referring to fig. 4 ~ 8, the fused salt core model obtained using embodiment 2 prepares hollow O-shaped sealing ring, and steps are as follows:
1) as shown in figure 4, hollow O-shaped sealing ring upper mold 8 and preforming mould A pre-molding top half at normal temperature, in advance
The pressure time 30 seconds or so, then preforming mould A is removed, rubber part is made to be retained in hollow O-shaped sealing ring upper mold 8, such as Fig. 5 institute
Show.
2) likewise, as shown in fig. 6, hollow O-shaped sealing ring lower die 9 and preforming mould B pre-molding lower half at normal temperature
Preforming mould B squeeze time 30 seconds or so, is then removed in part, so that rubber part is retained in hollow O-shaped sealing ring lower die 9, such as
Shown in Fig. 7.
3) among preforming good lower half portion rubber, it is put into the fused salt core model 10 processed, as shown in figure 8, being put into
After fused salt core model, molding vulcanization, curing temperature and time formulate according to vulcanization of rubber characteristic.
4) product is taken out, is obtained as shown in figure 9, having the product of fused salt core model.With the formed punch of corresponding size, technique is made
Hole 7.
5) product with fused salt core model is put into hot water, by fabrication hole 7, is dissolved into salt gradually in water, until
Inside rubber it is completely salt-free until, obtain complete hollow O-shaped sealing ring.
Embodiment 5
A kind of hollow O-shaped sealing ring, as shown in figure 3, its side has fabrication hole 7, the diameter of the fabrication hole 7 is sealing
Enclose the 1/6 ~ 1/4 of cross diameter.The hollow O-shaped sealing ring decrement is big, is easy to produce in enormous quantities, at low cost.
Claims (3)
1. a kind of hollow O-ring seal moulding process mold of fused salt mandrel molding, which is characterized in that the mold includes
The downside of upper mold (1) arranged up and down and lower die (2), upper mold (1) is equipped with upper cavity (3), and the upper side of lower die (2) is equipped with down
Die cavity (4), the upper cavity (3) and lower mode cavity (4) are corresponding, and type chamber is complemented each other to form under molding state, upper mold (1)
Upper side be respectively equipped with the sprue gate (5) communicated with upper cavity (3) and exhaust outlet (6), the type chamber and hollow O-shaped sealing ring
Hollow cavity match.
2. the hollow O-ring seal moulding process mold of fused salt mandrel molding according to claim 1, feature exist
In the size of the sprue gate (5) is 2 mm of φ ~ φ 3mm.
3. the hollow O-ring seal moulding process mold of fused salt mandrel molding according to claim 1, feature exist
In the exhaust outlet (6) opens up 2-3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820533864.3U CN208697792U (en) | 2018-04-16 | 2018-04-16 | A kind of hollow O-ring seal moulding process mold of fused salt mandrel molding |
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| CN201820533864.3U CN208697792U (en) | 2018-04-16 | 2018-04-16 | A kind of hollow O-ring seal moulding process mold of fused salt mandrel molding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108340523A (en) * | 2018-04-16 | 2018-07-31 | 成都盛帮密封件股份有限公司 | Moulding process, fused salt core model and the mold of hollow O-ring seal fused salt core model |
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2018
- 2018-04-16 CN CN201820533864.3U patent/CN208697792U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108340523A (en) * | 2018-04-16 | 2018-07-31 | 成都盛帮密封件股份有限公司 | Moulding process, fused salt core model and the mold of hollow O-ring seal fused salt core model |
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