CN115256724A - Silicone tube mould pressing technology - Google Patents
Silicone tube mould pressing technology Download PDFInfo
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- CN115256724A CN115256724A CN202210805926.2A CN202210805926A CN115256724A CN 115256724 A CN115256724 A CN 115256724A CN 202210805926 A CN202210805926 A CN 202210805926A CN 115256724 A CN115256724 A CN 115256724A
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- 238000003825 pressing Methods 0.000 title claims abstract description 21
- 229920001296 polysiloxane Polymers 0.000 title claims description 24
- 238000005516 engineering process Methods 0.000 title description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000000741 silica gel Substances 0.000 claims abstract description 87
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 87
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 48
- 238000004140 cleaning Methods 0.000 claims abstract description 47
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 14
- 238000005488 sandblasting Methods 0.000 claims abstract description 14
- 238000002791 soaking Methods 0.000 claims abstract description 13
- 238000004381 surface treatment Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000005406 washing Methods 0.000 claims description 30
- 239000003085 diluting agent Substances 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 24
- 229920001971 elastomer Polymers 0.000 claims description 8
- 239000005060 rubber Substances 0.000 claims description 8
- 239000011550 stock solution Substances 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 7
- 238000007865 diluting Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000004576 sand Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 239000004033 plastic Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 241000221535 Pucciniales Species 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- GVVPGTZRZFNKDS-JXMROGBWSA-N geranyl diphosphate Chemical compound CC(C)=CCC\C(C)=C\CO[P@](O)(=O)OP(O)(O)=O GVVPGTZRZFNKDS-JXMROGBWSA-N 0.000 description 2
- 229920005669 high impact polystyrene Polymers 0.000 description 2
- 239000004797 high-impact polystyrene Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/70—Maintenance
- B29C33/72—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of mold pressing of silica gel products, and discloses a mold pressing process of a silica gel tube, which comprises the following working steps: the first step is as follows: surface treatment of the mould; the second step is that: selecting and spraying a release agent; the third step: adjusting the temperature of the die and adjusting the direction of the die, wherein the surface treatment of the die comprises die cleaning and die sand blasting, and the die cleaning comprises the following working steps: cleaning by an S1 spraying method, cleaning by an S2 coating method and cleaning by an S3 soaking method, obtaining the most easily demoulded mould temperature and the most easily demoulded mould direction by debugging on the basis of not influencing the forming of a silica gel product, wherein the debugging method comprises the steps of debugging the temperature difference of the S1 mould and debugging the direction of the S2 product. Obtain the mould temperature of the easiest drawing of patterns through the debugging on the fashioned basis of not influencing silica gel product, through progressively increasing in proper order or descending the mould difference in temperature, the product drawing of patterns degree of difficulty is taking notes under to different difference in temperature, obtains the last lower mould difference in temperature of the easiest drawing of patterns, and the effect of quick drawing of patterns is reached to the accurate control mould temperature of rethread.
Description
Technical Field
The invention relates to the technical field of mold pressing of silica gel products, in particular to a mold pressing process of a silica gel tube.
Background
The processed products using silica gel as the main raw material are all called silica gel products. Silica gel is a porous substance with different particle sizes, is formed by properly dehydrating silicic acid gel, has an open porous structure, can adsorb a plurality of substances, is a good drying agent, an adsorbent and a catalyst carrier, has the adsorption effect mainly of physical adsorption, and can be regenerated and repeatedly used.
The process of the silica gel product mainly comprises the following steps: extrusion, mould pressing, calendering and solid-liquid state, which have the characteristics respectively, particularly, products such as a stethoscope silicone tube, a silica gel flow guide, a silica gel heating tube and the like which are very complementary by extrusion and mould pressing are all outstanding by supplementing the two products.
The molded silica gel product is usually solidified and formed by putting a solid silica gel raw material added with a vulcanizing agent into a high-temperature mold and then applying pressure through a vulcanizing machine, the hardness of the molded silica gel is usually 30-70 ℃, the color of the raw material is blended with color paste according to a pantone color card number, the shape of the mold determines the shape of the molded silica gel product, the molded silica gel product is the most widely applied one in the current silica gel industry, in the production process of the molded silica gel product, the demolding of the silica gel product is the most critical step, the problem of difficult demolding is encountered more or less in the production, and if the problem of difficult demolding is very serious, the production quality and the production efficiency of the silica gel product can be seriously influenced.
Therefore, a silicone tube molding process is provided.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a silicone tube mould pressing process.
In order to achieve the purpose, the invention adopts the following technical scheme, namely a silicone tube mould pressing process,
the method comprises the following working steps:
the first step is as follows: surface treatment of the mould;
the second step is that: selecting and spraying a release agent;
the third step: adjusting the mold temperature and adjusting the mold pressing direction.
Preferably, the surface treatment of the mold includes mold cleaning and mold blasting.
Preferably, the die cleaning comprises the following working steps: s1, cleaning by a spraying method, S2 cleaning by a coating method and S3 cleaning by a soaking method;
s1, cleaning by a spraying method, namely diluting silica gel mold washing water with water to form diluent, controlling the temperature of a mold to rise, spraying the diluent on the mold to soften dirt and float on the surface, and washing the mold by a large amount of clear water;
s2, cleaning by a coating method is to carry out deep cleaning again by adopting the coating method, wherein the coating means that a small amount of silica gel mold washing water stock solution is coated on the surface of a mold, and then the mold is controlled to be heated, so that the silica gel mold washing water stock solution is boiled on the mold, the effect of removing rubber residues, parting agents, oxide layers and slight rust is achieved, and the mold can be easily cleaned by water after dirt on the mold is softened and floated;
s3, when large-area intractable stains are attached to the mold, cleaning by a soaking method can be achieved, S1 and S2 can be omitted until the mold is cleaned by the soaking method, the mold washing water and the water are diluted by 5 times to form diluent, the diluent is guided into a cleaning pool, the cleaning pool is heated, the temperature of the diluent is heated to 95 ℃, the mold is soaked in the diluent, whether the stains on the mold are softened and float up or not is observed, and then the mold is washed by clear water.
Preferably, the silica gel product molding is to perform mold washing treatment on the mold in front of an upper oil pressure molding machine, sand blasting treatment is performed on a new mold which is just discharged, different mold washing sand is selected for a male mold and a female mold, and the mold which is just sprayed with the sand is discharged and molded after being heated to a sufficient temperature.
Preferably, in the second step, the release agent is divided into a dry release agent, a neutral release agent and an oil release agent, and the required release agent is selected according to needs, and the addition ratio of the silica gel internal release agent is generally 0.2-0.5%, and if the silica gel product is particularly difficult to release, the amount of the release agent can be gradually increased and can be increased to 1% at most.
Preferably, in the third step, the temperature of the mold and the direction of the pressing mold which are most easily demoulded are obtained through debugging on the basis of not influencing the molding of the silica gel product, and the debugging method comprises S1 mold temperature difference debugging and S2 product direction debugging.
Preferably, the temperature difference debugging of the S1 mold is realized by sequentially increasing or decreasing the temperature difference between the upper mold and the lower mold, and the demolding difficulty of the product under different temperature differences is recorded, so that the temperature difference between the upper mold and the lower mold which is most easily demolded is obtained.
Preferably, the direction of the S2 product is adjusted, because the temperature of the upper die is higher than that of the lower die, the silica gel product is usually adhered to the lower die when the die is lifted, and the demolding difficulty is reduced by adjusting the forming direction of the product, for example, taking a T-shaped silica gel product as an example, the structure of the T-shaped silica gel product is complex in the upper structure and simple in the lower structure, if the T-shaped silica gel product is inversely molded, the more complex side of the T-shaped silica gel product is distributed in the lower die, and the product is adhered to the lower die and is more difficult to demold, and the direction during molding is selected according to the structural characteristics of the product, so that the side of the simple structure of the product is distributed in the lower die, and the demolding difficulty of the product is reduced.
Advantageous effects
The invention provides a silicone tube die pressing process. The method has the following beneficial effects:
(1) This silicone tube molding process, silica gel mould use up the back and in time wash, but do not wash with cold water immediately, wash after the mould is cooled, can prolong its life, the dust is inhaled very easily to the silica gel mould because of the relation of static, does not use for a long time, need use the protection box to deposit its protection, cleans the mould through selecting different cleaning method, if: the cleaning by the spraying method S1, the cleaning by the coating method S2 and the cleaning by the soaking method S3 keep the die clean, thereby achieving the effect of facilitating the demoulding of the die in the using process.
(2) This silicone tube molding process, it washes the mould to glue system forming die and handles before oiling pressure forming machine platform, especially the new mould that has just discharged the electricity will carry out sand blasting earlier, for the public master model selects different washing sand, the mould that has just sprayed sand will heat and arrange the shaping again after enough temperature, the roughness on sandblast surface depends on the coarse grain size of sand during the mould sandblast, the mould sandblast is to flatten some unsmooth granules that can't see with naked eye, get rid of some remaining burrs and rusts, make the product surface more smooth, the effect that has reached improvement silica gel product quality.
(3) According to the silicone tube mould pressing process, the required release agent is selected according to the requirement, the addition proportion of the release agent in the silicone is generally 0.2-0.5%, if the silicone product is particularly difficult to demould, the dosage of the release agent can be gradually increased, and can be increased to 1% at most, and the effect of improving the demoulding efficiency is further achieved.
(4) This silicone tube mould pressing technology, through the debugging obtain the mould temperature of the easiest drawing of patterns on not influencing the fashioned basis of silica gel product, through in proper order progressively add or decrease the lower mould difference in temperature, the product drawing of patterns degree of difficulty is taking notes under to different differences in temperature, obtains the last lower mould difference in temperature of the easiest drawing of patterns, and the effect of the quick drawing of patterns is reached to rethread accurate control mould temperature.
(5) This silicone tube molding process, through the debugging on the fashioned basis of not influencing the silica gel product the moulding-die direction of the easiest drawing of patterns, because when going up mould temperature and being greater than the lower mould temperature, the silica gel product glues the lower mould usually when lifting the mould, through the shaping direction of adjustment product, reduce the drawing of patterns degree of difficulty, for example, take T font silica gel product as an example, the structure of T font silica gel product is the complicated below simple structure of top structure, if invert the moulding-die with T font silica gel product, the more complicated party of T font silica gel product distributes in the lower mould, at this moment the product glues just becoming more difficult to the drawing of patterns in the lower mould, direction when selecting the moulding-die according to the structural feature of product, make the party of product simple and easy structure distribute in the lower mould, thereby reached the effect that reduces the drawing of patterns degree of difficulty of product.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a silicone tube molding process comprises the following working steps:
the first step is as follows: surface treatment of the mould; the surface treatment of the mould comprises mould cleaning and mould sand blasting;
the die cleaning method comprises the following working steps:
s1, cleaning by a spraying method; diluting silica gel mold washing water and water by 5 times to form diluent, controlling the temperature of a mold to be 100 ℃, spraying the diluent on the mold to soften dirt floating on the surface, and washing the mold by using a large amount of clear water;
s2, cleaning by a coating method; after the operation step S1, when rubber residues, a parting agent, an oxidation layer and slight iron rust exist on the mould, deep cleaning is carried out again by adopting a coating method, wherein coating refers to coating a small amount of silica gel mold washing water stock solution on the surface of the mould, and then the temperature of the mould is controlled to be increased, so that the silica gel mold washing water stock solution is boiled on the mould, the effect of removing the rubber residues, the parting agent, the oxidation layer and the slight iron rust is achieved, and the mould can be easily cleaned by water after dirt is softened and floats;
s3, cleaning by a soaking method; when large-area intractable stains are attached to the mold, S1 and S2 can be omitted until the mold is cleaned by a soaking method, silica gel mold washing water and water are diluted by 5 times to form diluent, the diluent is introduced into a cleaning pool, the cleaning pool is heated to heat the diluent to 95 ℃, the mold is soaked in the diluent, whether the stains on the mold are softened and float is observed, the mold is taken out and washed by clear water after the stains on the mold are softened and float, the mold is cleaned, and the surface moisture of the mold is dried by an air gun after the mold is cleaned so as to avoid the mold oxidation;
the silica gel mold is cleaned in time after being used, but is not immediately washed by cold water, and is cleaned after being cooled, so that the service life of the silica gel mold can be prolonged, the silica gel mold is easy to absorb dust due to the electrostatic relation, is not used for a long time, needs to be protected and stored by a protection box, and is easier to demould in the using process by keeping the mold clean;
the roughness of the sand blasting surface depends on the coarse granularity of sand during the sand blasting of the mold, the main function of the sand blasting of the mold is to flatten some invisible concave-convex particles, remove some residual burrs and rusts, so that the surface of a product is smoother, the mold washing treatment is carried out on the silica gel product forming mold before an oil pressure forming machine table is applied, especially, the sand blasting treatment is carried out on a new mold which is just discharged, different mold washing sand is selected for male and female molds, and the mold which is just sprayed with the sand is discharged and formed after being heated to a sufficient temperature;
the second step is that: selecting and spraying a release agent; the release agent is divided into a dry release agent, a neutral release agent and an oily release agent, wherein an oil film of the dry release agent is extremely thin, corner residual points do not exist, the characteristic is good, the surface of a formed product is dry and oilless, the release agent is suitable for releasing a mould when large plastic products such as PIASTICS, ABS, PVC, PP, PE and the like are subjected to injection moulding, secondary processing such as silk-screen printing, electroplating, gold stamping, oil spraying, pasting and the like is not influenced, and the release agent is suitable for general demoulding of toys, household appliances, plastics, rubber, glass and metal products; the method has the advantages of good effect, multiple demolding times, embroidery prevention, lubrication, no damage to a mold, no damage to the surface finish of the plastic, and wool spinning lubrication, convenience and durability, is suitable for demolding in the production of various industrial products of plastics, silicon rubber, glass and metal, such as ABS, SAN, PP, POM, PC, PA, PE, HIPS, PVC, GPP and the like, the required demolding agent is selected according to the requirement, the addition proportion of the demolding agent in the silica gel is generally 0.2-0.5%, and if the silica gel product is particularly difficult to demold, the dosage of the demolding agent can be gradually increased to 1% at most;
the third step: adjusting the mold temperature and the direction of the pressing mold; the silica gel product is favored to be adhered to a half of the lower mold temperature, for example, when the upper mold temperature is 175 ℃, the lower mold temperature is 165 ℃, the silica gel product is usually adhered to the lower mold when the mold is lifted, and the mold temperature and the pressing mold direction which are most easy to demould are obtained by debugging on the basis of not influencing the molding of the silica gel product;
s1, debugging the temperature difference of the die: sequentially increasing or decreasing the temperature difference between the upper die and the lower die, and recording the demolding difficulty of the product under different temperature differences to obtain the temperature difference between the upper die and the lower die which is most easy to demold;
s2, product direction debugging, when the temperature of the upper die is higher than that of the lower die, the silica gel product is usually adhered to the lower die when the die is lifted, and the demolding difficulty is reduced by adjusting the forming direction of the product.
Example two: a silicone tube molding process comprises the following working steps:
the first step is as follows: surface treatment of the mould; the surface treatment of the mould comprises mould cleaning and mould sand blasting;
the die cleaning method comprises the following working steps:
s1, cleaning by a spraying method; diluting silica gel mold washing water and water by 5 times to form diluent, controlling the temperature of a mold to 120 ℃, spraying the diluent on the mold to soften dirt floating on the surface, and washing the mold by using a large amount of clear water;
s2, cleaning by a coating method; after the operation step S1, when rubber residues, a parting agent, an oxidation layer and slight rust exist on the mold, deep cleaning is carried out again by adopting a coating method, wherein the coating method is that a small amount of silica gel mold washing water stock solution is coated on the surface of the mold, then the temperature of the mold is controlled to be raised, so that the silica gel mold washing water stock solution is boiled on the mold, the effect of removing the rubber residues, the parting agent, the oxidation layer and the slight rust is achieved, and the mold can be easily cleaned by water after dirt is softened and floats;
s3, cleaning by a soaking method; when large-area intractable stains are attached to the mold, S1 and S2 can be omitted until the mold is cleaned by a soaking method, the mold washing water and the water are diluted by 3 times to form diluent, the diluent is introduced into a cleaning pool, the cleaning pool is heated to heat the diluent to 100 ℃, the mold is soaked in the diluent, whether the stains on the mold are softened and float is observed, the mold is taken out and washed by clear water after the stains on the mold are softened and float, the mold is cleaned, and the surface moisture of the mold is dried by an air gun after the mold is cleaned so as to avoid the mold oxidation;
the silica gel mold is cleaned in time after being used, but is not immediately washed by cold water, and is cleaned after being cooled, so that the service life of the silica gel mold can be prolonged, the silica gel mold is easy to absorb dust due to the static relation, is not used for a long time, and needs to be protected and stored by a protection box;
the roughness of the sand blasting surface of the mold during sand blasting depends on the coarse granularity of the sand, the main function of the mold sand blasting is to flatten invisible concave-convex particles to remove residual burrs and rusts, so that the surface of a product is smoother, the mold washing treatment is carried out on the silica gel product forming mold before an oil pressure forming machine, especially, the sand blasting treatment is carried out on a new mold which is just discharged, different mold washing sand is selected for a male mold and a female mold, and the mold which is just sprayed with the sand is discharged and formed after being heated to a sufficient temperature;
the second step: selecting and spraying a release agent; the release agent is divided into a dry release agent, a neutral release agent and an oily release agent, wherein the oil film of the dry release agent is extremely thin, no corner residual points exist, the characteristic is good, the surface of a formed product is dry and oilless, the release agent is suitable for releasing from a mould during injection molding of large plastic products such as PIASTICS, ABS, PVC, PP, PE and the like, secondary processing such as silk-screen printing, electroplating, gold stamping, oil spraying, pasting and the like is not influenced, the release agent is suitable for common release application of toys, household appliances, plastics, rubber, glass and metal products, the neutral release agent is prepared by mixing various high-quality raw materials and composite additives, and has the functions of lubricating a mould, corrosion resistance and rust resistance, a plurality of release times, no pollution to the surface of the product, no influence on secondary processing, and is suitable for using products between oiliness and non-oiliness, and is particularly suitable for forming and releasing of transparent products such as oil spraying, silk-screen printing, electroplating, gold stamping and the like; the method has the advantages of good effect, multiple demolding times, embroidery prevention, lubrication, no damage to a mold, no damage to the surface finish of the plastic and wool lubrication, convenience and durability, and suitability for demolding in the production of various industrial products of plastics, silicon rubber, glass and metal, such as ABS, SAN, PP, POM, PC, PA, PE, HIPS, PVC, GPP and the like, the required demolding agent is selected according to the requirement, the addition proportion of the demolding agent in the silica gel is generally 0.2-0.5%, and if the silica gel product is particularly difficult to demold, the dosage of the demolding agent can be gradually increased to 1% at most;
the third step: adjusting the mold temperature and adjusting the direction of the pressing mold; the silica gel product is favored to be adhered to the half of the lower mold temperature, for example, when the upper mold temperature is 175 ℃, the lower mold temperature is 165 ℃, the silica gel product is usually adhered to the lower mold when the mold is lifted, and the mold temperature and the mold pressing direction which are most easy to release are obtained through debugging on the basis of not influencing the molding of the silica gel product;
s1, debugging the temperature difference of the die: sequentially increasing or decreasing the temperature difference between the upper die and the lower die, and recording the demolding difficulty of the product under different temperature differences to obtain the temperature difference between the upper die and the lower die which is most easy to demold;
s2, product direction debugging, because the temperature of the upper die is higher than that of the lower die, the silica gel product is usually adhered to the lower die when the die is lifted, and the demolding difficulty is reduced by adjusting the forming direction of the product, for example, taking a T-shaped silica gel product as an example, the structure of the T-shaped silica gel product is that the upper structure is complex, the lower structure is simple, if the T-shaped silica gel product is inversely molded, the more complex side of the T-shaped silica gel product is distributed in the lower die, and the demolding is more difficult when the product is adhered to the lower die at the moment, and the direction of the molding is selected according to the structural characteristics of the product, so that the side of the simple structure of the product is distributed in the lower die, and the demolding difficulty of the product is reduced
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A silicone tube molding process is characterized in that: the method comprises the following working steps:
the first step is as follows: surface treatment of the mould;
the second step is that: selecting and spraying a release agent;
the third step: adjusting the mold temperature and adjusting the mold pressing direction.
2. The silicone tube molding process according to claim 1, characterized in that: the surface treatment of the mold includes mold cleaning and mold blasting.
3. The silicone tube molding process according to claim 2, characterized in that: the die cleaning method comprises the following working steps: s1, cleaning by a spraying method, S2 cleaning by a coating method and S3 cleaning by a soaking method;
s1, cleaning by a spraying method, namely diluting silica gel mold washing water with water to form diluent, controlling the temperature of a mold to rise, spraying the diluent on the mold to soften dirt and float on the surface, and washing the mold by a large amount of clear water;
s2, cleaning by a coating method is to carry out deep cleaning again by adopting the coating method, wherein the coating means that a small amount of silica gel mold washing water stock solution is coated on the surface of a mold, and then the mold is controlled to be heated, so that the silica gel mold washing water stock solution is boiled on the mold, the effect of removing rubber residues, parting agents, oxide layers and slight rust is achieved, and the mold can be easily cleaned by water after dirt on the mold is softened and floated;
s3, cleaning by a soaking method, namely when large-area intractable stains are attached to the mold, saving S1 and S2 until the mold is cleaned by the soaking method, diluting the silica gel mold washing water by 5 times with the water to form a diluent, introducing the diluent into a cleaning pool, heating the cleaning pool to heat the diluent to 95 ℃, soaking the mold in the diluent, observing whether the stains on the mold are softened and floated, and washing with clear water.
4. The silicone tube molding process according to claim 2, characterized in that: the silica gel product molding is to perform mold washing treatment on a mold in front of an upper oil pressure molding machine, sand blasting treatment is performed on a new mold which is just discharged, different mold washing sands are selected for a male mold and a female mold, and the mold which is just sprayed with the sands is heated to a sufficient temperature and then discharged for molding.
5. The silicone tube molding process according to claim 1, characterized in that: in the second step, the release agent is divided into a dry release agent, a neutral release agent and an oily release agent, the required release agent is selected according to requirements, the addition ratio of the silica gel internal release agent is generally 0.2-0.5%, and if the silica gel product is particularly difficult to release, the use amount of the release agent can be gradually increased to 1% at most.
6. The silicone tube molding process according to claim 1, characterized in that: and thirdly, obtaining the mould temperature and the pressing mould direction which are most easy to demould through debugging on the basis of not influencing the forming of the silica gel product, wherein the debugging method comprises S1 mould temperature difference debugging and S2 product direction debugging.
7. The silicone tube molding process according to claim 6, characterized in that: the S1 mould temperature difference debugging step sequentially increases or decreases the temperature difference between the upper mould and the lower mould, records the demoulding difficulty of the product under different temperature differences, and obtains the temperature difference between the upper mould and the lower mould which is most easy to demould.
8. The silicone tube molding process according to claim 6, wherein: s2 the debugging of product direction, when because last mould temperature is greater than the lower mould temperature, the silica gel product glues the lower mould usually when lifting the mould, through the shaping direction of adjustment product, reduce the drawing of patterns degree of difficulty, for example, use T font silica gel product as an example, the structure of T font silica gel product is the complicated below simple structure of top structure, if invert the moulding-die with T font silica gel product, the more complicated party of T font silica gel product distributes in the lower mould, at this moment the product glues just become more difficult to the drawing of patterns in the lower mould, direction when selecting the moulding-die according to the structural feature of product, the party that makes the simple and easy structure of product distributes in the lower mould, thereby the drawing of patterns degree of difficulty of product has been reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210805926.2A CN115256724A (en) | 2022-07-08 | 2022-07-08 | Silicone tube mould pressing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210805926.2A CN115256724A (en) | 2022-07-08 | 2022-07-08 | Silicone tube mould pressing technology |
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| CN115256724A true CN115256724A (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210805926.2A Withdrawn CN115256724A (en) | 2022-07-08 | 2022-07-08 | Silicone tube mould pressing technology |
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| Country | Link |
|---|---|
| CN (1) | CN115256724A (en) |
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- 2022-07-08 CN CN202210805926.2A patent/CN115256724A/en not_active Withdrawn
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