CN113443819A

CN113443819A - Fire-resistant gypsum mould and manufacturing method thereof

Info

Publication number: CN113443819A
Application number: CN202110444971.5A
Authority: CN
Inventors: 杨惠姗; 蔡和珍; 曾志明
Original assignee: Shanghai Liuli Gongfang Liuli Arts & Crafts Co ltd
Current assignee: Shanghai Liuli Gongfang Liuli Arts & Crafts Co ltd
Priority date: 2021-04-24
Filing date: 2021-04-24
Publication date: 2021-09-28
Anticipated expiration: 2041-04-24
Also published as: CN113443819B

Abstract

The application relates to a fire-resistant gypsum mould and a manufacturing method thereof, relating to the technical field of gypsum moulds, wherein the fire-resistant gypsum mould comprises two oppositely-arranged shells which are hollow inside and open on one side, one side of each shell opposite to the opening is provided with a plurality of ejector pins in a penetrating manner, one end of each shell close to the opening is fixed with a flexible anti-leakage layer, one end of each ejector pin close to the opening penetrates through the anti-leakage layer to form a butting part, the ejector pins and the anti-leakage layers are fixed in a sealing manner, a gypsum body is fixed in a cavity defined by the anti-leakage layer and the plane of the opening of the shell, and a mould cavity is formed in the gypsum body; the manufacturing method comprises modeling and simulation, mould verification, grouting and mould removal. This application has the product percent of pass that improves mould shaping work piece and the convenient advantage of making the gypsum mould.

Description

Fire-resistant gypsum mould and manufacturing method thereof

Technical Field

The application relates to the technical field of gypsum molds, in particular to a fire-resistant gypsum mold and a manufacturing method thereof.

Background

Gypsum is a hydrate whose main chemical component is calcium sulfate, and is widely used in industrial materials and building materials, such as cement retarders, gypsum building products, model making, and the like.

As shown in figure 1, the bird ornament comprises a head part, a body part and a tail part, wherein the ornament 6 is symmetrically arranged by an interface 62, the interface 62 is the largest section of the ornament, and a wing part 61 is integrally fixed on the body part.

The ornament can be made by using a plaster mold, generally, the plaster mold is made by pouring plaster slurry into a female mold, then putting a 6-shaped ornament mold into the plaster slurry, obtaining plaster after the plaster slurry in the female mold is molded, then mounting a female mold upper mold, pouring the plaster slurry, removing the mold after the plaster in the female mold upper mold is hardened, and taking out the 6-shaped ornament mold to obtain the plaster mold.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: because the posture of the swing 6 sample mold is different when being placed, the upper mold and the lower mold of the plaster mold have different cavity structures, and the stability control difficulty of the quality of the produced product is high.

Disclosure of Invention

In order to improve the unstable problem of present gypsum mould preparation symmetry goods of furniture for display rather than for use quality control, this application provides a fire-resistant gypsum mould and preparation method thereof.

In a first aspect, the present application provides a refractory gypsum mold that employs the following technical solution:

the utility model provides a fire-resistant gypsum mould, includes two inside cavity, the open casing in one side that run from opposite directions to set up, a plurality of thimbles are worn to be equipped with to the casing is located uncovered relative one side, and the casing is close to open one end and is fixed with flexible leak protection layer, and the thimble is close to open one end and passes leak protection layer and form butt portion, and sealed fixed between thimble and the leak protection layer, leak protection layer and casing are fixed with the gypsum body in the cavity that the uncovered place plane of place encloses, have seted up the die cavity on the gypsum body.

By adopting the technical scheme, after the two shells are assembled, the die cavity is used for pouring and molding the required workpiece. After a plurality of thimbles and the butt of model mould, form preliminary profile, leak protection layer makes the gypsum body be shell-shaped structure, pours the heat dissipation that the fuse-element of back mould intracavity can be faster, improves the shaping quality of product. The abutting part is positioned in the plaster body, so that the overall structural strength of the plaster body is improved.

Optionally, a magnetic part is fixed to the shell corresponding to the position of the thimble, the thimble penetrates through the magnetic part and can slide along the length direction of the thimble, and the magnetic part can fix the thimble in a magnetic attraction manner.

By adopting the technical scheme, when the mould is manufactured, whether the size of the gypsum mould is correct or not can be judged in advance by checking the insertion depth of the ejector pin, and the auxiliary inspection is facilitated. When the ejector pin is moved to check, the ejector pin position can be fixed through magnetic attraction, and the operation is convenient.

Optionally, the shell is provided with a code for displaying a position and an insertion depth at the position of the thimble, and the surface of the thimble is provided with scales along the length direction.

By adopting the technical scheme, an operator can check the scale on the thimble and the code corresponding to the thimble on the shell, thereby being beneficial to the convenience of field operation.

Optionally, the leak-proof layer is connected with a paste injection pipe, one end of the paste injection pipe is connected with the gypsum body, and the other end of the paste injection pipe extends out of the shell.

Through adopting above-mentioned technical scheme, can directly pour into the gypsum thick liquid into through annotating the gypsum pipe after the check-up of casing compound die finishes, can be simultaneously in two casings one shot forming gypsum body, improve the site operation efficiency.

Optionally, a water injection hole is arranged on the shell, and the water injection hole and the gypsum body are located on two sides of the leakage-proof layer.

Through adopting above-mentioned technical scheme, when carrying out the mould preparation, can pressurize through water injection hole water injection for the gypsum thick liquid closely laminates with the appearance mould, improves the fineness of die cavity, and the work piece quality surface profile of pouring is clear.

Optionally, the paste injection pipe is formed by arranging one or more thimbles along the central axis to form a paste injection hole.

By adopting the technical scheme, the paste injection pipe and the ejector pin are integrated, and structural parts of the die are reduced.

Optionally, the two shells are clamped by a fastener.

Through adopting above-mentioned technical scheme, the casing is fixed through the card, and operating personnel installs and dismantles the convenience.

Optionally, the magnetic member is an electromagnet.

Through adopting above-mentioned technical scheme, through the electric current size of adjusting the electro-magnet, can control the magnetic attraction of magnetic part, transfer undercurrent when removing the thimble, increase electric current when needs thimble fixed position makes things convenient for the operation.

In a second aspect, the present application provides a method for manufacturing a refractory gypsum mold, which adopts the following technical scheme:

the manufacturing method of the fire-resistant gypsum mold comprises the following steps:

modeling and simulating: determining and coding the depth value of each thimble inserted into the shell in the three-dimensional model;

checking the mold: putting the sample mold into the shells and splicing, then moving the thimbles on the two shells to approach each other, checking whether the position of each thimble conforms to the code on the shells, adjusting and calibrating;

grouting: injecting gypsum slurry into a cavity enclosed between the anti-leakage layer and the sample mold, and curing the gypsum to form a gypsum body;

removing the mold: the shell is separated and the mold is removed from the plaster body to form a mold cavity in the plaster body. .

Optionally, in the grouting step, after the gypsum slurry is injected, water is injected into the cavity formed by the casing and the anti-leakage layer for pressurization.

By adopting the technical scheme, the gypsum body is taken as the shell, so that the hardening speed is greatly improved compared with that of the gypsum body which is completely filled in the shell. Even when the gypsum body does not meet the quality requirement or is locally damaged, the gypsum body fixed with the abutting part can be shattered by vibrating the ejector pin and then manufactured again, and the waste of gypsum is reduced. The position of the ejector pin can be checked in advance when an operator makes the die, the quality is corrected in advance, the reject ratio of die making is reduced, and the production cost is saved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the gypsum body is thin shell-shaped, the gypsum bodies on the two shells are symmetrically arranged, workpieces with uniform quality can be produced in batches, the heat dissipation of the melt is fast after the pouring, and the production efficiency and the quality of the workpieces are improved.

2. Whether the contour of the leakage-proof layer meets the design requirement or not can be judged in advance through the position of the ejector pin during the manufacturing of the die, and the adjustment is carried out in advance, so that the die manufacturing cooperation rate is improved, and the waste of gypsum is reduced.

Drawings

FIG. 1 is a schematic view of a prior art swing member;

FIG. 2 is a schematic overall structure diagram of an embodiment of the present application;

FIG. 3 is an exploded view of a mold according to an embodiment of the present invention;

fig. 4 is a sectional view of a mold according to an embodiment of the present disclosure.

Description of reference numerals: 1. a housing; 11. folding edges; 12. a through hole; 13. a water injection hole; 14. a magnetic member; 2. a thimble; 21. an abutting portion; 3. a leakage-proof layer; 4. a plaster body; 41. a mold cavity; 5. a fastener; 51. a card slot; 6. a decoration piece; 61. a wing portion; 62. an interface.

Detailed Description

The present application is described in further detail below with reference to figures 2-4.

The embodiment of the application discloses a refractory gypsum mold and a manufacturing method thereof.

Referring to fig. 2 and 3, the fire-resistant plaster mold comprises two housings 1 arranged in a split manner and an ejector pin 2 installed on each housing 1, a plaster body 4 is filled in an inner cavity of each housing 1, a mold cavity 41 is formed in each plaster body 4, and the mold cavity 41 formed by splicing the two housings 1 forms a cavity with the same outer contour as that of the swing part 6.

Referring to fig. 2 and 3, the casing 1 is a cuboid structure with a hollow interior and an open side, and the casing 1 can be made of stainless steel, has certain strength and corrosion resistance, and is convenient to maintain and clean. A plurality of through holes 12 are formed in one surface, opposite to the opening, of the shell 1, a magnetic part 14 is fixedly installed in the through holes 12, and the ejector pin 2 penetrates through the magnetic part 14 and can move in a reciprocating mode along the axis of the through holes 12. The through holes 12 are arranged in the housing 1 in an array, and the distance between two adjacent through holes 12 is determined according to the size of the housing 1 and the swing part 6, wherein the distance between the through holes 12 can be 30 mm. In other embodiments of the present embodiment, the pitch of the through holes 12 in the middle of the housing 1 is smaller than the pitch of the through holes 12 at the edge of the housing 1.

The side wall of the shell 1 is provided with a water injection hole 13 for filling water into the inner cavity of the shell 1. The open edge of the shell 1 is integrally fixed with a folded edge 11, and the two shells 1 are fixed through a fastener 5 after being spliced. The fastener 5 can be an L-shaped stainless steel piece, the fastener 5 is provided with an L-shaped clamping groove 51, and the thickness of the clamping groove 51 is the same as that of the two folded edges 11, so that the fastener 5 can be clamped on the folded edges 11, and the two shells 1 are fixed.

Casing 1 is close to open one end and is fixed with flexible leak protection layer 3, and leak protection layer 3 can have high temperature resistance for the glass fiber cloth that the coating has teflon resin. The leakage-proof layer 3 is fixedly connected with a paste injection pipe (not shown in the figure), and one end of the paste injection pipe, which is far away from the leakage-proof layer 3, is pulled out from the water injection hole 13.

One end of the thimble 2 penetrates through the leakage-proof layer 3 to form an abutting part 21, the length of the abutting part 21 can be 20mm-80mm, and the length of the abutting part 21 is 50 mm. Thimble 2 can be the stainless steel post of diameter 8mm, and the tip of butt portion 21 is the cambered surface, and the one end that thimble 2 kept away from butt portion 21 is the portion of gripping of diameter increase.

In other embodiments of the embodiment of the present application, the paste injection tube may also be formed by forming an injection hole on one or more thimbles 2.

A stainless steel shim of 0.5mm thickness is affixed to the sample rocker 6 die along interface 62, the sample rocker 6 die is placed into housing 1 with the two sides of the support pin supported on housing 1. The thimble 2 is moved to make the contact portion 21 contact with the surface of the sample mold of the swing portion 6, and the thimble 2 and the magnetic member 14 are magnetically attracted to a fixed position. In order to adjust the attraction of the magnetic element 14 to the thimble 2, the magnetic element 14 may be an electromagnet, and the attraction of the magnetic element 14 to the thimble 2 is controlled by changing the magnitude of the current, so as to increase the friction force between the thimble 2 and the magnetic element 14. When the position of the thimble 2 needs to be moved, the external current is reduced, the thimble 2 can move smoothly, and after the thimble 2 moves to the required position, the current of the magnetic part 14 is increased to fix the position of the thimble 2.

In order to check that the moving position of the thimble 2 meets the design requirement, the surface of the thimble 2 is provided with scales along the length direction.

The plaster body 4 is fixed integrally with the abutting part 21 and the leakage-proof layer 3, and the plaster body 4 is formed by hardening plaster slurry.

referring to fig. 4, three-dimensional modeling and simulation: a three-dimensional model of the ornament 6 and the wear-resistant plaster mold is established, and the depth of each thimble 2 inserted into the shell 1 is determined in a simulation mode. Numbering the thimbles 2 according to the row values, defining the length direction of the shell 1 as a row i of the thimbles 2, defining the width direction of the shell 1 as a row j of the thimbles 2, and numbering the thimbles 2 as A_ijCorresponding depth of insertion value H_ij. For example, the number of the thimble 2 in the 3 rd row and the 6 th row is A₃₆Insertion depth of 605mm, H₃₆=605, the corresponding position and depth code is 36605, the first two bits represent the position, and the last three bits represent the insertion depth.

Assembling a mold: the coding of the thimble 2 is displayed on the corresponding position of the shell 1 in a steel seal mode, all parts of the mould are assembled together according to the design of a drawing, and the current conduction state of the magnetic part 14 is debugged.

Checking the mold: and (3) coating a release agent on the surface of the swing piece 6 sample die, putting the swing piece 6 sample die into the shell 1, enabling the interface 62 of the swing piece 6 sample die to be flush with the open end face of the shell 1, and fixing the other half shell 1 through a fastener 5. Then, the thimbles 2 on the two shells 1 are moved to approach each other until the thimbles 2 cannot move, and at the moment, the current is increased to enable the thimbles 2 to be fixed. And checking whether the scales on each thimble 2 are consistent with the coded numbers or not, and if not, adjusting to meet the design requirements.

Grouting: gypsum slurry is injected into a cavity enclosed by the anti-leakage layer 3 through the gypsum injection pipe, then water is injected into the shell 1 through the water injection hole 13 for pressurization, the water pressure can be 0.5-1.5MPa, so that the gypsum slurry is tightly attached to the swing part 6 model die, and after the gypsum slurry is solidified to form the gypsum body 4, water is stopped to be introduced. The water injection temperature may be 80 ℃ or higher in order to accelerate the hardening of the gypsum slurry.

Removing the mold: the fastener 5 is removed and the housing 1 is separated to separate the cast 6 from the plaster body 4.

Because the plaster body 4 is a shell, the hardening speed is greatly improved compared with the hardening speed of the plaster body completely filled in the shell 1. Even if the gypsum body 4 does not meet the quality requirement or is locally damaged, the gypsum body 4 fixed with the abutting part 21 can be shattered by vibrating the ejector pin 2 and then is manufactured again, so that the waste of gypsum is reduced.

The position of the thimble 2 can be checked in advance when an operator makes a mould, the quality is corrected in advance, the reject ratio of the mould is reduced, and the production cost is saved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a fire-resistant gypsum mould, includes two inside cavity, the open casing of one side (1) of run from opposite directions setting, its characterized in that: casing (1) are located uncovered relative one side and wear to be equipped with a plurality of thimble (2), casing (1) are close to open one end and are fixed with flexible leak protection layer (3), thimble (2) are close to open one end and pass leak protection layer (3) and form butt portion (21), it is sealed fixed between thimble (2) and leak protection layer (3), be fixed with stone lotion (4) in the cavity that leak protection layer (3) and casing (1) uncovered place plane enclose, die cavity (41) have been seted up on stone lotion (4).

2. The fire resistant gypsum mold of claim 1, wherein: the shell (1) is fixed with a magnetic part (14) corresponding to the ejector pin (2), the ejector pin (2) penetrates through the magnetic part (14) and can slide along the length direction of the ejector pin (2), and the magnetic part (14) can fix the ejector pin (2) in a magnetic attraction mode.

3. The fire resistant gypsum mold of claim 1, wherein: the shell (1) is provided with a code for displaying the position and the insertion depth at the position of the thimble (2), and the surface of the thimble (2) is provided with scales along the length direction.

4. The fire resistant gypsum mold of any one of claims 1-3, wherein: the leak-proof layer (3) is connected with a plaster injection tube, one end of the plaster injection tube is connected with the plaster body (4), and the other end of the plaster injection tube extends out of the shell (1).

5. The fire resistant gypsum mold of claim 1, wherein: the shell (1) is provided with a water injection hole (13), and the water injection hole (13) and the gypsum body (4) are positioned on two sides of the anti-leakage layer (3).

6. The fire resistant gypsum mold of claim 4, wherein: the paste injection pipe is formed by arranging paste injection holes along the central axis for one or more thimbles (2).

7. The fire resistant gypsum mold of claim 1, wherein: the two shells (1) are clamped and fixed through a fastener (5).

8. The fire resistant gypsum mold of claim 2, wherein: the magnetic part (14) is an electromagnet.

9. A method for manufacturing a fire-resistant gypsum mold, using the fire-resistant gypsum mold according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

modeling and simulating: determining and coding the depth value of each thimble (2) inserted into the shell (1) in the three-dimensional model;

checking the mold: putting the sample mold into the shells (1) and splicing, then moving the thimbles (2) on the two shells (1) to approach each other, checking whether the position of each thimble (2) is consistent with the code on the shell (1), adjusting and calibrating;

grouting: gypsum slurry is injected into a cavity enclosed between the anti-leakage layer (3) and the sample mold, and gypsum is hardened to form a gypsum body (4);

removing the mold: the shell (1) is separated, the sample mold is taken out of the plaster body (4), and a cavity (41) is formed on the plaster body (4).

10. The method of making a fire resistant gypsum mold according to claim 9, wherein: in the grouting step, after the gypsum slurry is injected, water is injected into a cavity formed by the shell (1) and the anti-leakage layer (3) for pressurization.