阅读说明：本技术 一种用于混凝土预制块的硅胶模具及制作方法及制作工艺 (Silica gel mold for concrete precast block, and manufacturing method and manufacturing process thereof ) 是由 邓磊 陈慧乾 周扬 魏豪 田亚力 岳树杰 张凯 徐海霖 马维勤 于 2021-09-01 设计创作，主要内容包括：本发明属于建筑材料制备技术领域,具体而言,本发明提供了一种用于混凝土预制块的硅胶模具,包括硅胶模具以及用于硅胶模具脱模用的脱膜装置,硅胶模具包括模具主体,模具主体呈圆台形结构,一种用于混凝土预制块的硅胶模具的制作方法,包括以下步骤：步骤S1、甲基嵌段室温硫化处理,由羟基封头的聚二甲基硅氧烷和甲基三乙氧基硅烷低聚物的共聚体,在二丁基二月桂酸锡的催化下生成三向结构的聚合体,通过改进混凝土预制块模具性质,实现混凝土预制块的高精度制造,完美填充进入混凝土结构预留构造内部,实现无缝修补。解决了目前对于混凝土预留构造修复效率低、质量难以控制、难以进行高精度修复的问题。(The invention belongs to the technical field of building material preparation, and particularly provides a silica gel mold for a concrete precast block, which comprises the silica gel mold and a demolding device for demolding the silica gel mold, wherein the silica gel mold comprises a mold main body, the mold main body is of a circular truncated cone-shaped structure, and the manufacturing method of the silica gel mold for the concrete precast block comprises the following steps: and S1, vulcanizing the methyl block at room temperature, generating a three-dimensional polymer by the copolymer of polydimethylsiloxane of a hydroxyl end socket and a methyl triethoxysilane oligomer under the catalysis of dibutyltin dilaurate, and realizing high-precision manufacturing of the concrete precast block by improving the property of the concrete precast block mould, wherein the concrete precast block is perfectly filled into the reserved structure of the concrete structure to realize seamless repair. The method solves the problems that the existing concrete reserved structure is low in repairing efficiency, difficult to control quality and difficult to repair with high precision.)

1. The utility model provides a silica gel mould for concrete precast block which characterized in that: comprises a silica gel mould and a demoulding device used for demoulding the silica gel mould;

the silicone rubber mold comprises a mold main body, the mold main body is of a circular truncated cone-shaped structure, expansion lugs are uniformly arranged on the peripheral surface and the position close to the top of the mold main body, and the silicone rubber mold is a copolymer of polydimethylsiloxane of a hydroxyl end socket and a methyl triethoxysilane oligomer;

the demoulding device comprises an upper expanding mechanism, a lower expanding mechanism and a mould placing seat, wherein the lower expanding mechanism is installed at the bottom of the mould placing seat, the silica gel mould is clamped in the mould placing seat, and the upper expanding mechanism is used for being butted with the lower expanding machine and expanding the top of the silica gel mould;

the upper expanding mechanism comprises a driving table, the driving table is of a circular table-shaped structure and is arranged in a large-sized mode and a small-sized mode, sliding grooves are evenly formed in the surfaces of the periphery of the driving table and in positions corresponding to the expanding lugs, sliding blocks are connected inside the sliding grooves in a sliding mode, one surface, far away from the central axis line, of each sliding block is fixedly connected with one end of a connecting rod, the other end of each connecting rod is hinged to the top of each expanding rod, a lifting clamping mechanism is arranged in the middle of the driving table, and the lifting clamping mechanism is used for clamping concrete precast blocks in the silica gel mold;

the die comprises a die placing seat, wherein the periphery of the top of the die placing seat is uniformly provided with a mounting groove, and the bottom of the inner wall of the mounting groove is provided with a guide hole;

a lower expansion mechanism, which comprises a shaft lever, the shaft lever is rotationally connected inside the mounting groove, a torsion spring is arranged between the shaft lever and the mounting groove, is used for resetting the rotary displacement of the shaft lever, the middle part of the surface of the shaft lever is respectively and fixedly connected with a butt joint rod and a ratchet wheel, the ratchet wheel is positioned in the middle of the bottom end of the butt joint rod, the bottom of the ratchet wheel is clamped with a pin rod, the bottom of the pin rod is fixedly connected with the bottom of the unlocking plate, the top of the unlocking plate is fixedly connected with the guide rod, the guide rod is connected inside the guide hole in a sliding manner, an unlocking spring is sleeved on the surface of the guide rod, the two ends of the unlocking spring are respectively and fixedly connected with the bottom of the inner wall of the mounting groove and the bottom of the unlocking plate, the unlocking plate is fixedly connected with the inner ring wall of the unlocking ring, and the unlocking ring is movably connected with the outer surface of the mold placing seat.

2. The silicone mold for a concrete precast block according to claim 1, characterized in that: the lifting clamping mechanism comprises a counterforce cylinder, the center of the top of the driving table is respectively provided with a sliding hole, the reaction cylinder is connected with the inside of the sliding hole in a sliding way, the inside of the reaction cylinder is connected with a lifting rod in a sliding way, the bottom of the lifting rod penetrates through the counter-force cylinder and is fixedly connected with a mounting ring, clamping claws are evenly hinged around the mounting ring, the middle part of the clamping claw is hinged with a hinged lug which is fixedly connected with the bottom of the counter-force cylinder, the top of the lifting rod penetrates through the counter-force cylinder and is fixedly connected with a connecting sleeve, the surface of the lifting rod is sleeved with a return tension spring, two ends of the return tension spring are respectively and fixedly connected with the connecting sleeve and the driving platform, a counter pressure spring is sleeved on the surface of the counter force cylinder, and two ends of the counter-force pressure spring are respectively fixed with the bottom of the driving platform and the bottom of the counter-force cylinder.

3. The silicone mold for a concrete precast block according to claim 2, characterized in that: the clamping claw is three in number, the bottom of the clamping claw is provided with an anti-skidding claw head, and the anti-skidding claw head is made of elastic anti-skidding materials.

4. A silicone mold for a concrete precast block according to claim 3, characterized in that: threaded holes are uniformly formed in the middle of the peripheral surface of the connecting sleeve, screws are screwed in the threaded holes, and the connecting sleeve is tightly connected with a pressure shaft of a manual or automatic press through the screws.

5. The silicone mold for a concrete precast block according to claim 4, characterized in that: the pound number of the return tension spring is smaller than that of the counter-force pressure spring, and the stroke of the lifting rod is larger than that of the counter-force pressure spring.

6. A method for manufacturing a silica gel mold for a concrete precast block, which is applied to the silica gel mold for the concrete precast block according to claims 1 to 5, and is characterized in that: the method comprises the following steps:

s1, vulcanizing the methyl block at room temperature, and condensing hydroxyl in polydimethylsiloxane and ethoxy in polymethyl triethoxy silane to generate a polymer with a three-dimensional structure by using a copolymer of polydimethylsiloxane of a hydroxyl end socket and a methyl triethoxy silane oligomer under the catalysis of dibutyl tin dilaurate;

step S2, improving the vinyl content, and improving the integral hardness of the silica gel mold;

step S21, carrying out vacuum-pumping dehydration on the dimethyl siloxane mixed ring body for 1-4 hours at the temperature of 70-90 ℃;

step S22, after dehydration is finished, adding a vinyl double-end socket, a vinyl ring body, tetramethylammonium hydroxide alkali glue and a polymerization inhibitor into a reaction kettle, uniformly stirring, and heating to perform a sealing ring-opening polymerization reaction for 2-4 hours;

and step S23, after the polymerization is finished, heating to 180-200 ℃, and vacuumizing to remove low-molecular volatile components for 2-4 hours.

7. The method for manufacturing the silica gel mold for the concrete precast block according to claim 6, wherein the method comprises the following steps: in the step S1, the specific operation of the room temperature vulcanization treatment of the methyl block is to vulcanize the surface of the block rubber for 8 hours under the conditions of 20 ℃, a relative humidity of 50% to 60%, and a mass fraction of dibutyltin dilaurate of 0.5% to 2%.

8. The method for manufacturing the silica gel mold for the concrete precast block according to claim 7, wherein the method comprises the following steps: after the silica gel mold is manufactured and formed, the smoothness of the silica gel mold is improved by adopting a grinding process, and the silica gel mold is isolated from reacting with concrete by adopting an MC-313K release agent.

9. The method for manufacturing the silica gel mold for the concrete precast block according to claim 8, wherein: the polishing finish of the silica gel mold adopts Ra0.1 micron surface roughness.

Technical Field

The invention belongs to the technical field of building material preparation, and particularly relates to a silica gel mold for a concrete precast block and a manufacturing method thereof.

Background

When the building engineering structure is under construction, all can cause building form's unaesthetic to split bolt, climb awl and reserve entrance to a cave etc. to building required precision height or need not to plaster the clear water concrete building, repair the in-process not only inefficiency in the later stage, more have the problem that the quality is difficult to guarantee, especially plaster the back of making level, especially leave the potential safety hazard for later stage use. The existing plastic, resin and steel template materials damage the edge with the largest accumulated deformation of concrete due to hardness during demoulding, and one-step forming is difficult to realize;

in the demolding process, pure manual demolding is generally adopted in the prior art, a large number of molds need to be manually demolded, time and labor are wasted, the probability of waste products is greatly increased, the engineering progress is delayed, and the engineering quality is reduced.

Disclosure of Invention

The invention is realized by the following steps:

the invention provides a silica gel mold for a concrete precast block, which comprises a silica gel mold and a demolding device for demolding the silica gel mold;

the silicone rubber mold comprises a mold main body, the mold main body is of a circular truncated cone-shaped structure, expansion lugs are uniformly arranged on the peripheral surface and the position close to the top of the mold main body, and the silicone rubber mold is a copolymer of polydimethylsiloxane of a hydroxyl end socket and a methyl triethoxysilane oligomer;

the demoulding device comprises an upper expanding mechanism, a lower expanding mechanism and a mould placing seat, the lower expanding mechanism is installed at the bottom of the mould placing seat, the silica gel mould is clamped in the mould placing seat, and the upper expanding mechanism is used for being butted with the lower expanding machine and expanding the top of the silica gel mould;

the upper expansion mechanism comprises a driving table, the driving table is of a circular table-shaped structure and is arranged in a large-sized and small-sized mode, sliding grooves are uniformly formed in the surfaces of the periphery of the driving table and in positions corresponding to the expansion lugs, sliding blocks are connected inside the sliding grooves in a sliding mode, one surface, far away from the central axis of the driving table, of each sliding block is fixedly connected with one end of a connecting rod, the other end of each connecting rod is hinged to the top of each expansion rod, a lifting clamping mechanism is arranged in the middle of the driving table, and the lifting clamping mechanism is used for clamping concrete precast blocks in the silica gel mold;

the die placing seat is characterized in that mounting grooves are uniformly formed in the periphery of the top of the die placing seat, and guide holes are formed in the bottom of the inner wall of each mounting groove;

the lower expansion mechanism comprises a shaft lever, the shaft lever is rotationally connected inside the mounting groove, a torsion spring is arranged between the shaft lever and the mounting groove, is used for resetting the rotary displacement of the shaft lever, the middle part of the surface of the shaft lever is respectively and fixedly connected with a butt joint rod and a ratchet wheel, the ratchet wheel is positioned in the middle of the bottom end of the butt joint rod, the bottom of the ratchet wheel is clamped with a pin rod, the bottom of the pin rod is fixedly connected with the bottom of the unlocking plate, the top of the unlocking plate is fixedly connected with the guide rod, the guide rod is connected inside the guide hole in a sliding manner, an unlocking spring is sleeved on the surface of the guide rod, the two ends of the unlocking spring are respectively and fixedly connected with the bottom of the inner wall of the mounting groove and the bottom of the unlocking plate, the unlocking plate is fixedly connected with the inner ring wall of the unlocking ring, and the unlocking ring is movably connected with the outer surface of the mold placing seat.

Further, the lifting clamping mechanism comprises a counter-force cylinder, sliding holes are respectively arranged at the center of the top of the driving table, the reaction cylinder is connected with the inside of the sliding hole in a sliding way, the inside of the reaction cylinder is connected with a lifting rod in a sliding way, the bottom of the lifting rod penetrates through the counter-force cylinder and is fixedly connected with a mounting ring, clamping claws are evenly hinged around the mounting ring, the middle part of the clamping claw is hinged with a hinged lug which is fixedly connected with the bottom of the counter-force cylinder, the top of the lifting rod penetrates through the counter-force cylinder and is fixedly connected with a connecting sleeve, the surface of the lifting rod is sleeved with a return tension spring, two ends of the return tension spring are respectively and fixedly connected with the connecting sleeve and the driving platform, a counter pressure spring is sleeved on the surface of the counter force cylinder, and two ends of the counter-force pressure spring are respectively fixed with the bottom of the driving platform and the bottom of the counter-force cylinder.

Furthermore, the number of the clamping claws is three, and the bottom of each clamping claw is provided with an anti-skidding claw head made of elastic anti-skidding materials.

Furthermore, threaded holes are evenly formed in the middle of the peripheral surface of the connecting sleeve, screws are screwed in the threaded holes, and the connecting sleeve is fixedly connected with a pressure shaft of a manual or automatic press through the screws.

Furthermore, the pound number of the return tension spring is smaller than that of the counter-force pressure spring, and the stroke of the lifting rod is larger than that of the counter-force pressure spring.

On the other hand, the manufacturing method of the silica gel mold for the concrete precast block comprises the following steps:

s1, vulcanizing the methyl block at room temperature, and condensing hydroxyl in polydimethylsiloxane and ethoxy in polymethyl triethoxy silane to generate a polymer with a three-dimensional structure by using a copolymer of polydimethylsiloxane of a hydroxyl end socket and a methyl triethoxy silane oligomer under the catalysis of dibutyl tin dilaurate;

step S2, improving the vinyl content, and improving the integral hardness of the silica gel mold;

step S21, carrying out vacuum-pumping dehydration on the dimethyl siloxane mixed ring body for 1-4 hours at the temperature of 70-90 ℃;

step S22, after dehydration is finished, adding a vinyl double-end socket, a vinyl ring body, tetramethylammonium hydroxide alkali glue and a polymerization inhibitor into a reaction kettle, uniformly stirring, and heating to perform a sealing ring-opening polymerization reaction for 2-4 hours;

and step S23, after the polymerization is finished, heating to 180-200 ℃, and vacuumizing to remove low-molecular volatile components for 2-4 hours.

In step S1, the methyl block room temperature vulcanization treatment is specifically performed under the conditions of 20 ℃, a relative humidity of 50% to 60%, and a mass fraction of dibutyltin dilaurate of 0.5% to 2%, and the surface vulcanization time of the block rubber is 8 hours.

Furthermore, after the silica gel mold is manufactured and formed, the smoothness of the silica gel mold is improved by adopting a grinding process, and the silica gel mold is prevented from reacting with concrete by adopting an MC-313K release agent.

Furthermore, the polishing finish of the silica gel mold adopts Ra0.1 micron surface roughness.

The invention has the beneficial effects that:

1. according to the invention, by improving the properties of the concrete precast block mould, the high-precision manufacturing of the concrete precast block is realized, the concrete precast block is perfectly filled into the reserved structure of the concrete structure, the seamless repair is realized, and the problems of low repair efficiency, difficult quality control and difficult high-precision repair of the existing reserved structure of the concrete are solved.

2. According to the invention, the demoulding device is arranged, the top of the silica gel mould is opened under the pressure action of the press machine through the cooperation of the upper expanding mechanism and the lower expanding mechanism, and the concrete precast block is simultaneously clamped through the lifting clamping mechanism, so that the existing manual operation is mechanical operation, the working efficiency is improved, and the rejection rate is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of an exploded perspective structure according to the present disclosure;

FIG. 3 is a schematic view of a half-section perspective structure of an upper expanding mechanism disclosed in the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

FIG. 5 is a schematic view of a half-section three-dimensional structure of a driving platform disclosed by the present invention;

FIG. 6 is a schematic perspective view of a lower expansion mechanism according to the present disclosure;

FIG. 7 is a flow chart of a manufacturing method disclosed in the present invention.

Description of reference numerals: 1. a silica gel mold; 11. expanding the ear; 12. a mold body; 2. an upper expansion mechanism; 21. a drive stage; 211. a slide hole; 212. a chute; 22. a connecting rod; 23. a slider; 24. an expansion rod; 3. a lifting clamping mechanism; 31. connecting sleeves; 311. a threaded hole; 32. a lifting rod; 33. a return tension spring; 34. a counter-force pressure spring; 35. a counter-force cylinder; 36. a hinge ear; 37. clamping claws; 38. an anti-slip claw head; 39. a mounting ring; 4. a lower expansion mechanism; 41. a butt joint hole; 42. a docking rod; 43. a shaft lever; 44. a ratchet wheel; 45. a pin rod; 46. an unlocking plate; 47. a guide bar; 48. an unlocking spring; 49. unlocking the ring; 5. a mould placing seat; 51. mounting grooves; 52. a guide hole; 6. a concrete precast block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Example one

Referring to fig. 1-6, the invention provides a silica gel mold 1 for a concrete precast block 6, comprising a silica gel mold 1 and a demoulding device for demoulding the silica gel mold 1;

the silica gel mold 1 is characterized in that the silica gel mold 1 comprises a mold main body 12, the mold main body 12 is in a circular truncated cone-shaped structure, expansion lugs 11 are uniformly arranged on the peripheral surface and the top of the mold main body 12, and the silica gel mold 1 is a copolymer of polydimethylsiloxane of a hydroxyl end socket and a methyl triethoxysilane oligomer;

the demoulding device comprises an upper expanding mechanism 2, a lower expanding mechanism 4 and a mould placing seat 5, wherein the lower expanding mechanism 4 is arranged at the bottom of the mould placing seat 5, the silica gel mould 1 is clamped in the mould placing seat 5, and the upper expanding mechanism 2 is used for being butted with a lower expanding machine and expanding the top of the silica gel mould 1;

the upper expanding mechanism 2 comprises a driving table 21, the driving table 21 is of a circular truncated cone-shaped structure and is arranged in a large-sized mode and a small-sized mode, sliding grooves 212 are uniformly formed in the surfaces of the periphery of the driving table 21 and correspond to the positions of the expanding lugs 11, a sliding block 23 is connected inside the sliding grooves 212 in a sliding mode, one surface, far away from the central axis of the driving table 21, of the sliding block 23 is fixedly connected with one end of a connecting rod 22, the other end of the connecting rod 22 is hinged to the top of an expanding rod 24, a lifting clamping mechanism 3 is arranged in the middle of the driving table 21, and the lifting clamping mechanism 3 is used for clamping a concrete precast block 6 in the silica gel mold 1;

the periphery of the top of the mold placing seat 5 is uniformly provided with mounting grooves 51, and the bottom of the inner wall of each mounting groove 51 is provided with a guide hole 52;

lower expanding mechanism 4 includes axostylus axostyle 43, axostylus axostyle 43 rotates to be connected inside mounting groove 51, be provided with the torsional spring between axostylus axostyle 43 and the mounting groove 51, a rotational displacement for restoring to the throne axostylus axostyle 43, the middle part on axostylus axostyle 43 surface is fixed respectively to have butt joint pole 42 and ratchet 44, ratchet 44 is in the middle part department of butt joint pole 42 bottom, the bottom joint of ratchet 44 has pin pole 45, the bottom fixed connection in unlocking plate 46 of pin pole 45 is in the bottom of unlocking plate 46, unlocking plate 46's top fixedly connected with guide bar 47, guide bar 47 sliding connection is inside guide hole 52, the surface cover of guide bar 47 is equipped with unblock spring 48, unblock spring 48's both ends respectively with mounting groove 51 inner wall bottom and unlocking plate 46 bottom fixed connection, unlocking plate 46 and the interior annular wall fixed connection of unblock ring 49, unblock ring 49 swing joint is in the outside that seat 5 was placed to the mould.

The lifting clamping mechanism 3 comprises a counter-force cylinder 35, a sliding hole 211 is formed in the center of the top of the driving platform 21 respectively, the counter-force cylinder 35 is connected inside the sliding hole 211 in a sliding mode, a lifting rod 32 is connected inside the counter-force cylinder 35 in a sliding mode, a mounting ring 39 is fixedly connected to the bottom of the lifting rod 32 through the counter-force cylinder 35, clamping claws 37 are evenly hinged to the periphery of the mounting ring 39, hinge lugs 36 are hinged to the middle of the clamping claws 37, the hinge lugs 36 are fixedly connected to the bottom of the counter-force cylinder 35, a connecting sleeve 31 is fixedly connected to the top of the lifting rod 32 through the counter-force cylinder 35, a return tension spring 33 is sleeved on the surface of the lifting rod 32, two ends of the return tension spring 33 are fixedly connected with the connecting sleeve 31 and the driving platform 21 respectively, a counter-force pressure spring 34 is sleeved on the surface of the counter-force cylinder 35, and two ends of the counter-force pressure spring 34 are fixed to the bottom of the driving platform 21 and the bottom of the counter-force cylinder 35 respectively.

Specifically, the pressure shaft of the manual or automatic press is fastened and connected with the connecting sleeve 31 of the lifting clamping mechanism 3, the pressure shaft of the press descends to drive the upper expansion mechanism 2 to descend, then the expansion rod 24 penetrates through the expansion lug 11 of the silica gel mold 1 to be vertically inserted into the butt joint hole 41 of the butt joint rod 42 of the lower expansion mechanism 4, the diameter of the butt joint hole 41 can be designed to be larger due to the fact that the butt joint does not have the requirement on precision, therefore, the butt joint of the expansion rod 24 is facilitated, after the expansion rod 24 abuts against the bottom of the butt joint hole 41 to stop descending, the driving table 21 continues descending under the action of pressure, meanwhile, the sliding block 23 connected with the top end of the expansion rod 24 through the connecting rod 22 slides obliquely upwards along the direction of the sliding groove 212, so that the top of each expansion rod 24 outwards expands by taking the central shaft of the driving table 21 as the original point, and meanwhile, the bottom of the expansion rod 24 drives the butt joint rod 42 to rotate by taking the shaft rod 43 as the fulcrum, the opening angle is prevented from resetting through the matching of the ratchet wheel 44 and the pin rod 45, so that the top of the silica gel mold 1 is opened through the expansion rod 24, and the concrete precast block 6 is conveniently taken out;

then, the concrete precast block 6 is taken out by the lifting and clamping mechanism 3, and because the mechanisms are in a linkage state, the top of the concrete precast block 6 is clamped by the clamping claws 37 of the lifting and clamping mechanism 3 while the silica gel mold 1 is expanded, the concrete operation is that the lifting rod 32 is pressed down by the press, and the driving table 21 is lowered to a fixed position and can not move, at this time, the lifting rod 32 continues to descend, the three clamping claws 37 are always positioned at a pressing station due to the acting force of the counter pressure spring 34 of the counter pressure cylinder 35, and descend along with the lifting rod 32, after the counter pressure cylinder 35 descends to the stroke limit of the counter pressure spring 34, because the stroke of the lifting rod 32 is larger than the stroke of the counter pressure spring 34, at this time, the lifting rod 32 continues to descend, so that the clamping claws 37 rotate at the hinge ears 36, and all the three clamping claws 37 are outwards opened and reach a clamping point, then the concrete precast block 6 is lifted up by the pressure of the press, and the three clamping claws 37 clamp the concrete precast block 6 again under the pressure action of the counter-force pressure spring 34 and are lifted out of the silica gel mold 1 along with the lifting rod 32, so that the demolding is completed.

The number of the gripping claws 37 is three, the bottom of the gripping claw 37 is provided with an anti-skid claw head 38, and the anti-skid claw head 38 is made of elastic anti-skid material.

Threaded holes 311 are uniformly formed in the middle of the peripheral surface of the connecting sleeve 31, screws are screwed in the threaded holes 311, and the connecting sleeve 31 is tightly connected with a pressure shaft of a manual or automatic press through the screws.

The pound number of the return tension spring 33 is smaller than that of the reaction pressure spring 34, and the stroke of the lifting rod 32 is larger than that of the reaction pressure spring 34.

In order to achieve the above purpose, the invention provides the following technical scheme:

example two

As shown in fig. 7, a method for manufacturing a silica gel mold 1 for a concrete precast block 6 includes the following steps:

s1, vulcanizing the methyl block at room temperature, namely condensing hydroxyl in polydimethylsiloxane and ethoxy in polymethyltriethoxysilane to generate a three-dimensional polymer from a copolymer of polydimethylsiloxane and a methyltriethoxysilane oligomer of a hydroxyl end socket under the catalysis of dibutyltin dilaurate, wherein the vulcanizing time of the surface of the block adhesive is 8 hours under the conditions that the temperature is 20 ℃, the relative humidity is 50-60 percent, and the mass fraction of dibutyltin dilaurate is 0.5-2 percent;

the step S1 is to isolate the reaction between silica gel and the strong base ca (oh)2 in the concrete:

h4SiO4+ ca (oh)2 ═ CaSiO3 ↓ +3H 2O.

Step S2, improving the vinyl content, and improving the integral hardness of the silica gel mold 1;

step S21, carrying out vacuum-pumping dehydration on the dimethyl siloxane mixed ring body for 1-4 hours at the temperature of 70-90 ℃;

step S22, after dehydration is finished, adding a vinyl double-end socket, a vinyl ring body, tetramethylammonium hydroxide alkali glue and a polymerization inhibitor into a reaction kettle, uniformly stirring, and heating to perform a sealing ring-opening polymerization reaction for 2-4 hours;

and step S23, after the polymerization is finished, heating to 180-200 ℃, and vacuumizing to remove low-molecular volatile components for 2-4 hours.

Specifically, through the process flow of step S2, the method for increasing the vinyl content in the silicone mold is adopted to increase the hardness of the silicone mold, control the deformation of the silicone mold, and increase the durability of the silicone mold.

After the silica gel mold 1 is manufactured and formed, the finish degree of the silica gel mold 1 is improved by adopting a polishing process, and the silica gel mold is prevented from reacting with concrete by adopting an MC-313K release agent.

The polishing finish of the silica gel mold 1 adopts Ra0.1 micron surface roughness.

The operating principle of the demoulding device is that firstly, a silica gel mould 1 is placed in a mould placing seat 5, then the silica gel mould is tightly connected with a connecting sleeve 31 of a lifting clamping mechanism 3 through a pressure shaft of a manual or automatic press, the pressure shaft of the press descends to drive an upper expansion mechanism 2 to descend, then an expansion rod 24 penetrates through an expansion lug 11 of the silica gel mould 1 to be vertically inserted into a butt joint hole 41 of a butt joint rod 42 of a lower expansion mechanism 4, the butt joint hole 41 has no requirement on precision, the diameter of the butt joint hole 41 can be designed to be larger, the butt joint of the expansion rod 24 is convenient, after the expansion rod 24 abuts against the bottom of the butt joint hole 41 to stop descending, a driving platform 21 continues descending due to the pressure effect, meanwhile, a sliding block 23 connected with the top end of the expansion rod 24 through a connecting rod 22 slides towards the oblique upper direction along a sliding groove 212, so that the top of each expansion rod 24 outwards expands by taking the central shaft of the driving platform 21 as an original point, meanwhile, the bottom of the expansion rod 24 drives the butt joint rod 42 to rotate by taking the shaft rod 43 as a fulcrum, and the expanded angle is prevented from resetting through the matching of the ratchet wheel 44 and the pin rod 45, so that the top of the silica gel mold 1 is expanded through the expansion rod 24, and the concrete precast block 6 is conveniently taken out;

then, the concrete precast block 6 is taken out by the lifting and clamping mechanism 3, and because the mechanisms are in a linkage state, the top of the concrete precast block 6 is clamped by the clamping claws 37 of the lifting and clamping mechanism 3 while the silica gel mold 1 is expanded, the concrete operation is that the lifting rod 32 is pressed down by the press, and the driving table 21 is lowered to a fixed position and can not move, at this time, the lifting rod 32 continues to descend, the three clamping claws 37 are always positioned at a pressing station due to the acting force of the counter pressure spring 34 of the counter pressure cylinder 35, and descend along with the lifting rod 32, after the counter pressure cylinder 35 descends to the stroke limit of the counter pressure spring 34, because the stroke of the lifting rod 32 is larger than the stroke of the counter pressure spring 34, at this time, the lifting rod 32 continues to descend, so that the clamping claws 37 rotate at the hinge ears 36, and all the three clamping claws 37 are outwards opened and reach a clamping point, then the concrete precast block 6 is lifted up by the pressure of the press, and the three clamping claws 37 clamp the concrete precast block 6 again under the pressure action of the counter-force pressure spring 34 and are lifted out of the silica gel mold 1 along with the lifting rod 32, so that the demolding is completed.

It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".