CN113199602B

CN113199602B - Cambered surface prefabricated part mold and manufacturing method of prefabricated part

Info

Publication number: CN113199602B
Application number: CN202110624123.2A
Authority: CN
Inventors: 李清英; 刘海江; 杨强
Original assignee: Cmcc Investment Shanzhu Chengdu Prefabricated Building Technology Development Co ltd
Current assignee: Cmcc Investment Shanzhu Chengdu Prefabricated Building Technology Development Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2023-04-07
Anticipated expiration: 2041-06-04
Also published as: CN113199602A

Abstract

The invention relates to the technical field of prefabrication assembly, in particular to a cambered surface prefabricated part die and a manufacturing method of a prefabricated part. The prefabricated part with the inner wall and the outer wall both being cambered surfaces can be poured through the die, so that the prefabricated part is thinner in wall thickness, lighter in weight and convenient to carry and transport; and the inner wall and the outer wall are prefabricated parts with cambered surfaces, so that the using amount of poured concrete is less, and the cost is saved.

Description

Cambered surface prefabricated part mold and manufacturing method of prefabricated part

Technical Field

The invention belongs to the technical field of prefabrication and assembly, and particularly relates to a cambered surface prefabricated part mold and a manufacturing method of a prefabricated part.

Background

The concept of the assembly type construction is more and more popular at present, the assembly type construction is that the components are prefabricated in a factory and then are conveyed to a construction site, and the purpose of completing construction projects is achieved by assembling the components on the construction site.

And to some auxiliary facilities of job site, for example view class building, fish pond, flower bed, garbage bin etc. often adopt the cast-in-place of concrete to form, however cast-in-place structure usually is with higher costs, and construction cycle is longer, and the later stage also often is demolishd the scrap handling, can't carry wholly, is unfavorable for the control of cost. And the direct in-situ casting can cause a certain degree of environmental pollution, the in-situ casting needs to be maintained with great care, cracks are easy to generate, and the strength is relatively low.

Disclosure of Invention

In order to solve the problems of environmental pollution, low strength, complex maintenance and the like caused by the in-situ pouring of auxiliary facilities, the invention provides a cambered surface prefabricated part mould which is combined with a soft mould through a hard mould, and a fixed supporting device is arranged in the soft mould, so that the prefabricated part can be directly poured and maintained in a factory, and the use strength of the prefabricated part is ensured; and the prefab can be according to the cambered surface on the soft mould, pour out the complicated molding prefab that inner wall and outer wall all are the cambered surface for the wall thickness of prefab is thinner, and weight is lighter, the transportation and the maintenance in the later stage of being convenient for.

The technical scheme adopted by the invention is as follows: the utility model provides a cambered surface prefab mould, includes external mold and centre form, the face on external mold and the centre form is the cambered surface, the external mold is the hard mould, the centre form is the soft mould, be provided with fixed strutting arrangement in the centre form, several the external mold surrounds and constitutes the external mold body, the centre form sets up in the external mold body, the cambered surface on the centre form and the cambered surface on the external mold phase-match, leave mutually between external mold and the centre form.

Preferably, the fixed support means comprises a stripper plate and a support plate, the stripper plate and the support plate being in contact, the support plate supporting the internal cavity of the inner mould in combination with the stripper plate.

Preferably, the number of the supporting plates is two, the stripper plate is arranged between the two supporting plates, and the stripper plate slides relative to the supporting plates; the stripper plate is provided with a gripper portion.

Preferably, the stripper plate is provided with a positioning plate, and the positioning plate and the supporting plate are matched to limit the supporting plate.

A manufacturing method of a cambered surface prefabricated part comprises the following steps:

1) Assembling a mould, namely combining and splicing a plurality of external moulds to form an external mould body, placing an internal mould in the external mould body, and enabling the cambered surface on the internal mould to correspond to the cambered surface on the external mould; placing a fixed supporting device in the inner die, so that the side wall of the fixed supporting device is contacted with the inner wall of the inner die to support and fix the inner cavity of the inner die; then, placing a connecting plate at the opening of the inner mold, and fixedly connecting the outer mold, the inner mold and the connecting plate together to form a stable structure;

2) Pouring, namely pouring concrete in a gap between the outer die and the inner die, wherein the concrete forms a cambered surface prefabricated part according to cambered surface structures on the outer die and the inner die;

3) And demolding, namely after the prefabricated part reaches demolding strength, detaching the connecting plate, drawing out the fixed supporting device in the inner mold, then integrally removing the inner mold, and finally detaching the outer molds one by one to finish demolding.

Preferably, before the mold is assembled, a release agent is coated on the position, which is in contact with concrete, of the outer mold, wherein the release agent is a mixture of a waxy release agent and soybean oil and is used in the proportion of liquid wax: soybean oil =6:4.

preferably, the concrete pouring method in the step 2) comprises the following steps:

2.1 Uniformly stirring the concrete, putting the stirred concrete into a flat container, standing for 10 minutes, and taking out;

2.2 Pouring from the top during pouring, stopping and shaking the mould after pouring 20kg of concrete to ensure that concrete materials in the mould are uniform and compact until the pouring is finished;

2.3 The slender rod is used for up-down pulling and inserting in the concrete in the pouring process, and the pulling and inserting times are 20-50 times;

2.4 After pouring is finished, the mould is placed on a vibration mould table for vibration, and the vertical horizontal vibration is carried out for 5 to 10s, and then the high-frequency vibration is carried out for 5 to 10s;

2.5 After the component is initially set, the exposed surface of the component is subjected to surface collection once every 1-2 hours, and the surface collection times are 2-3 times.

Preferably, the fixed support device comprises a stripper plate and a support plate, the stripper plate and the support plate are in contact, and the support plate and the stripper plate are combined to support the inner cavity of the inner mold.

Preferably, the demolding method of the fixing support device is to first draw out the demolding plate, form a space capable of relative movement between the support plate and the inner mold, and then draw out the support plate by using the space.

Preferably, after pouring and before demolding, performing primary curing on the member, respectively measuring the concrete strength of the 1 st day and the 3 rd day during the primary curing period to determine demolding time, and recording the environmental temperature once every 12 hours during the curing period; and demolding the prefabricated part when the concrete strength of the prefabricated part is higher than 50MPa, and curing the prefabricated part again after demolding is finished, wherein the curing mode is natural curing.

The invention has the advantages that:

1) Through the combined arrangement of the hard film and the soft film, the prefabricated part with the inner wall and the outer wall both being cambered surfaces can be poured, so that the prefabricated part is thinner in wall thickness, lighter in weight and convenient to carry and transport; the inner wall and the outer wall are prefabricated parts with cambered surfaces, so that the using amount of poured concrete is less, and the cost is saved;

2) The fixed supporting device is arranged in the soft film, and when demoulding is carried out, the fixed supporting device is firstly pulled out, so that the soft film can be naturally demoulded in a state of being separated from the support, the fast demoulding process is ensured, the demoulding process is accelerated, the speed of producing prefabricated parts in a factory can be improved, and the production efficiency is accelerated;

3) The whole process of pouring, solidifying and maintaining can be completed by the prefabricated part in a factory, and the whole process is not required to be carried out on a construction site, so that the strength of the prefabricated part is ensured, and the problems that the prefabricated part has higher strength and is not easy to generate cracks and the like when being transported to a site for use are solved; the environmental problem that the job site can not bring because wet pouring has also been guaranteed, and after the prefab was used and is accomplished, later stage also was convenient for demolish and reuse, further reduction construction cost.

Drawings

FIG. 1 is a schematic structural view of an inner mold of the present invention;

FIG. 2 is a schematic structural view of an outer mold of the present invention;

FIG. 3 is a schematic view of the construction of the support plate and stripper plate combination;

FIG. 4 is a schematic view of the construction of the stripper plate;

FIG. 5 is a side view of the stripper plate;

FIG. 6 is a schematic view of the structure of the preform.

In the figure: 1-outer mold, 2-inner mold, 3-demolding plate, 4-support plate, 5-prefabricated part, 11-connecting hole, 21-soft film connecting plate, 22-through hole, 23-soft film top plate, 24-groove, 31-positioning plate and 32-gripper part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

Example one

As shown in fig. 5, taking the pouring of the arc flowerpot as an example, the flowerpot is provided with arc surfaces on the inner wall and the outer wall of the four side surfaces, so that the whole poured prefabricated member is light in weight, and the usage amount of the concrete poured in the pouring process is reduced.

A cambered surface prefabricated part mould comprises an outer mould 1 and an inner mould 2, wherein the surfaces of the outer mould 1 and the inner mould 2 are cambered surfaces, the outer mould 1 is a hard mould, the inner mould 2 is a soft mould, as shown in figure 1, the inner mould 2 is preferably a silica gel soft mould in the embodiment, the four side surfaces of the silica gel soft mould are cambered surfaces, a soft membrane connecting plate 21 is arranged on the end surface of the inner mould 2, a through hole 22 is formed in the soft membrane connecting plate 21, the soft membrane connecting plate 21 is used for being combined and connected with the outer mould 1, the connection mode is bolt connection, and the connection can be completed after a bolt penetrates through the through hole 22; set up soft mould roof 23 on the other terminal surface of centre form 2, be close to soft mould roof 23 department on the lateral wall of centre form 2 and be provided with recess 24, when pouring, recess 24 department forms the bottom of flowerpot, is close to the upper end that soft membrane connecting plate 21 department formed the flowerpot.

The outer die 1 is arranged in a single piece, the surface of the outer die 1 is a cambered surface, and the cambered surface on the inner die 2 is matched with the cambered surface on the outer die 1, so that the inner and outer cambered surfaces of the side wall of the flowerpot poured out are guaranteed to be cambered surfaces on the side wall. The outer die 1 surrounds to form an outer die body, in the embodiment, the four outer dies 1 surround and are connected to form the outer die body, a fixing and supporting device is arranged in the inner die 2, the inner die 2 is arranged in the outer die body, and the outer die 1 and the inner die 2 are separated from each other. When the mould is combined, the fixing and supporting device is placed in the internal mould 2, so that the fixing and supporting device is in contact with the internal mould 2, and the internal mould 2 is prevented from deforming due to extrusion force of concrete during pouring; and then the four outer dies 1 are placed on the outer side of the inner die 2, and the outer dies 1 and the inner die 2 are fixedly connected together through bolts, so that the whole die is kept stable.

The fixed supporting device comprises a stripping plate 3 and a supporting plate 4, the stripping plate 3 is in contact with the supporting plate 4, and the supporting plate 4 is combined with the stripping plate 3 to support the inner cavity of the inner die 2. Backup pad 4 contacts with the inner wall of centre form 2 to guarantee the support to centre form 2, when taking out the back with stripper plate 3, backup pad 4 loses stripper plate 3's support this moment, has formed the space that can remove, alright take out in centre form 2 with backup pad 4 with being quick.

In the present embodiment, the number of the supporting plates 4 is preferably two, as shown in fig. 3, the stripper plate 3 is arranged between the two supporting plates 4, the supporting plates 4 are positioned at two sides of the stripper plate 3, and the stripper plate 3 slides relative to the supporting plates 4; the stripper plate 3 is provided with a grip portion 32. During the drawing of patterns, operating personnel handheld tongs portion 32 takes out stripper plate 3, and then has formed the space that can relative motion between two backup pads 4, and backup pad 4 can be quick at this moment takes out from centre form 2, can accomplish fixed strutting arrangement's quick taking out.

The stripper plate 3 is provided with a positioning plate 31, and the positioning plate 31 and the support plate 4 are matched to limit the support plate 4. As shown in fig. 4-5, the positioning plate 31 is disposed at the edge of the stripper plate 3, and when the stripper plate 3 and the support plate 4 are combined, the edge of the support plate 4 is snapped outside the positioning plate 31, so that the stripper plate 3 is not moved around when combined with the support plate 4, thereby causing the overall deformation of the mold.

Example two

By adopting the mold in the first embodiment, the method for casting the arc-shaped prefabricated part comprises the following steps, and in the embodiment, the casting of the arc-shaped flowerpot is taken as an example:

1) Assembling a mould, namely combining and splicing a plurality of external moulds 1 to form an external mould body, combining and splicing four external moulds 1 to form four side surfaces of the flowerpot in the embodiment, placing an internal mould 2 in the external mould body, and enabling the cambered surface on the internal mould 2 to correspond to the cambered surface on the external mould 1 so as to ensure that the inner side wall and the outer side wall of the flowerpot are cambered surfaces after pouring is finished; a fixing and supporting device is placed in the inner die 2, so that the side wall of the fixing and supporting device is in contact with the inner wall of the inner die 2, and the inner cavity of the inner die 2 is supported and fixed, and the inner die 2 is prevented from deforming due to extrusion of concrete when the concrete is poured; then, a connecting plate is placed at the opening (the opening of the fixed supporting device is placed) of the inner mold 2, and the outer mold 1, the inner mold 2 and the connecting plate are fixedly connected together to form a stable structure;

2) Pouring, namely pouring concrete in a gap between the outer die 1 and the inner die 2, wherein the concrete forms an arc prefabricated part according to arc structures on the outer die 1 and the inner die 2;

3) And (4) demolding, namely after the prefabricated member reaches demolding strength, detaching the connecting plate, drawing out the fixed supporting device in the inner mold 2, then integrally removing the inner mold 2, and finally detaching the outer molds 1 one by one to finish demolding.

Before assembling the mould, firstly, a mould release agent is coated on the surface of the external mould 1, which is contacted with concrete, the mould release agent is a waxy mould release agent and is mixed with soybean oil for use, and the proportion is liquid wax: soybean oil =6: and 4, shaking the release agent to be uniform before use to avoid wax precipitation in the liquid, and then uniformly coating the release agent on the surface of the glass fiber reinforced plastic outer die 1, wherein the coating mode can be full-surface coating.

The concrete method for pouring the concrete in the step 2) is that after the concrete is stirred, the concrete is placed into a flat container and stands for 10 minutes, and then the concrete is taken out for pouring so as to remove air bubbles. When pouring, pouring is carried out from the top of the mold, namely pouring is carried out from the side face of the soft mold top plate 23, the mold is shaken from side to side every 20kg of pouring, and the concrete material in the mold is ensured to be uniform and compact.

In the pouring process, slender materials such as reinforcing steel bars and the like are also used for vertically inserting and pulling the concrete, the inserting and pulling times are 20-50 times, and the compactness of the concrete is further improved. Especially, the number of times of pulling and inserting the reinforcing steel bars at the positions with patterns should be increased. During production, the mould is vertically placed on a mould platform, after pouring is completed, the mould platform is vibrated by adopting a vibrating mould platform, the vertical horizontal vibration lasts for 5-10 seconds, the high frequency lasts for 5-10 seconds (the two times can be alternatively performed), and the mould is held by two persons during vibration to avoid overturning.

And after pouring is finished and before demoulding, performing primary curing on the member, measuring the concrete strength of the 1 st day and the 3 rd day during the primary curing period respectively to determine demoulding time, and recording the environmental temperature every 12 hours during the curing period. And demolding when the demolding strength of the prefabricated part is higher than 50MPa, wherein the final demolding time is based on the strength measured by the concrete.

The demoulding method of the fixed supporting device comprises the steps of firstly drawing out the demoulding plate 3, forming a space capable of moving relatively between the supporting plate 4 and the inner mould 2, and then drawing out the supporting plate 4 by utilizing the space, thereby ensuring that the supporting plate can be drawn out quickly. In order to avoid damaging the die during die removal, a rubber hammer should be used.

And after demolding is finished, maintaining the prefabricated part again, wherein the maintenance adopts a natural maintenance mode.

The above embodiments are preferred embodiments, it should be noted that the above preferred embodiments should not be considered as limiting the invention, and the scope of protection of the invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and should be considered to be within the scope of the invention.

Claims

1. The utility model provides an arc surface prefabricated part mould, includes external mold (1) and centre form (2), its characterized in that: the surface on the outer die (1) and the surface on the inner die (2) are cambered surfaces, the outer die (1) is a hard die, the inner die (2) is a soft die, a fixed supporting device is arranged in the inner die (2), a plurality of outer dies (1) surround to form an outer die body, the inner die (2) is arranged in the outer die body, the cambered surface on the inner die (2) is matched with the cambered surface on the outer die (1), the outer die (1) and the inner die (2) are separated from each other, the fixed supporting device comprises a stripper plate (3) and a supporting plate (4), the supporting plate (4) is contacted with the inner die (2), the stripper plate (3) is contacted with the supporting plate (4), and the supporting plate (4) is combined with the stripper plate (3) to support the inner cavity of the inner die (2); the number of the supporting plates (4) is two, the stripper plate (3) is arranged between the two supporting plates (4), the supporting plates (4) are positioned at two sides of the stripper plate (3), and the stripper plate (3) slides relative to the supporting plates (4); a positioning plate (31) is arranged on the stripper plate (3), and the positioning plate (31) is matched with the support plate (4) to limit the support plate (4); the positioning plate (31) is arranged at the edge of the demoulding plate (3), and the edge of the supporting plate (4) is buckled at the outer side of the positioning plate (31).

2. A manufacturing method of a cambered surface prefabricated part is characterized by comprising the following steps:

1) Assembling a mould, namely combining and splicing a plurality of external moulds (1) to form an external mould body, placing an internal mould (2) in the external mould body, and enabling the cambered surface on the internal mould (2) to correspond to the cambered surface on the external mould (1); a fixed supporting device is placed in the inner die (2), so that the side wall of the fixed supporting device is contacted with the inner wall of the inner die (2) to support and fix the inner cavity of the inner die (2); then, a connecting plate is placed at an opening of the inner mold (2), the outer mold (1), the inner mold (2) and the connecting plate are fixedly connected together to form a stable structure, the fixing and supporting device comprises a demolding plate (3) and a supporting plate (4), the supporting plate (4) is in contact with the inner mold (2), the demolding plate (3) is in contact with the supporting plate (4), and the supporting plate (4) and the demolding plate (3) are combined to support an inner cavity of the inner mold (2); the number of the supporting plates (4) is two, the stripper plate (3) is arranged between the two supporting plates (4), the supporting plates (4) are positioned at two sides of the stripper plate (3), and the stripper plate (3) slides relative to the supporting plates (4); a positioning plate (31) is arranged on the demoulding plate (3), and the positioning plate (31) is matched with the supporting plate (4) to limit the supporting plate (4); the positioning plate (31) is arranged at the edge of the stripper plate (3), and the edge of the supporting plate (4) is buckled at the outer side of the positioning plate (31);

2) Pouring, namely pouring concrete at a gap between the outer die (1) and the inner die (2), wherein the concrete forms an arc prefabricated part according to arc structures on the outer die (1) and the inner die (2);

3) And (3) demolding, namely after the prefabricated member reaches demolding strength, detaching the connecting plate, drawing out the fixed supporting device in the inner mold (2), then integrally removing the inner mold (2), and finally removing the outer molds (1) one by one to complete demolding, wherein the demolding method of the fixed supporting device comprises the steps of firstly drawing out the demolding plate (3), forming a space capable of moving relatively between the supporting plate (4) and the inner mold (2), and then drawing out the supporting plate (4) by utilizing the space.

3. The method for manufacturing a preform with an arc surface according to claim 2, wherein: before the mold is assembled, a mold release agent is coated on the position, which is in contact with concrete, of the outer mold (1), wherein the mold release agent is a waxy mold release agent and is mixed with soybean oil for use, and the ratio of the waxy mold release agent to the soybean oil is as follows: soybean oil =6:4.

4. the method for manufacturing a preform with an arc surface according to claim 2, wherein: the concrete pouring method in the step 2) comprises the following steps:

2.1 ) uniformly stirring the concrete, then putting the stirred concrete into a flat container, standing for 10 minutes, and taking out;

2.4 After pouring is finished, the mould is placed on a vibration mould table for vibration, the vertical horizontal vibration is carried out for 5-10s, and then the high-frequency vibration is carried out for 5-10s;

5. The method for manufacturing a preform with an arc surface according to claim 2, wherein: after pouring is finished and before demolding is carried out, primary curing is carried out on the component, the concrete strength of the 1 st day and the 3 rd day is measured during the primary curing period so as to determine demolding time, and the environmental temperature is recorded every 12 hours during the curing period; and demolding the prefabricated part when the concrete strength of the prefabricated part is higher than 50MPa, and curing the prefabricated part again after demolding is finished, wherein the curing mode is natural curing.