A method of manufacturing a stamp

 

(57) Abstract:

The inventive method of manufacturing a stamp-based polymer concrete composition for forming sheet material is in the manufacture of master models, working models and concrete pre-matrix. On the working surface of a working model, put a layer of wax, and forming the surface of the workpiece degreased and coated with adhesive. Assemble the unit, establishing a working model over the workpiece with a gap equal to the thickness of the polymer layer. Make the fill polymer composition and subsequent heat treatment. As the polymer used epoxypolyester 100:200 with 10% additive of disulfit molybdenum. 4 C. p. F.-ly, 7 Il.

The invention relates to the processing of metals by pressure, and had to technology manufacturing dies for punching sheet material.

A known method of manufacturing a stamp, which consists in the manufacture of molding elements stamp of polymer materials and concrete composition by sequential deposition on the working surface of the master model. Both the polymer layer and the reinforced concrete base, and in the most loaded parts of stanchest process, and relatively low durability of the stamp due to the low mechanical and adhesion properties of the resulting polymer concrete composition.

The invention consists in that in the method of manufacturing a stamp, which is manufacturing shaping element stamp and education using the master model polymer layer, according to the invention form a cavity between the molding element of the stamp and the master model by setting the master model on formative element of the stamp with a gap, the formation of the polymer layer is performed by the injection of the polymer in the liquid state in the formed cavity with subsequent polymerization, and the obtained molding element coated with a polymeric wear layer is used for the manufacture of the response parts of the stamp.

The technical result from the use of the invention is to improve the technological process due to the possible deletion operations on complex reinforcement polymer layer. Exception transactions reinforcement is achieved by forming a polymer layer on the ready-made foundations of the parts of the stamp that allows you to get higher the basics.

Further increasing of technology provided by the fact that as the master model using promodel obtained by applying a curable layer of material on the forming element Satna, and the thickness of the applied curable layer shall not be less than twice the thickness of the formed sheet metal.

Increased longevity of the stamp is achieved by the fact that, as the polymer used epoxypolyester 100:120 with 10% additive of disulfit molybdenum.

Higher technical result is achieved by the fact that during injection of the polymer support its temperature equal 77-83aboutC, and the polymerization is carried out at a temperature equal to 100-110aboutAnd pressure 0,101-is 0.102 MPa.

In Fig. 1 is a flow diagram of the fabrication and preparation for the working model of Fig. 2 procurement matrix, treated outside surfaces; Fig. 3 the assembled unit, ready to be filled polymer composition; Fig. 4 matrix polymer wear layer; Fig. 5 blank matrix with an approximate profile of the working surface; NAF IG. 6 Assembly diagram and fill in the boxes in the manufacture of promodel; Fig. 7 assembled unit, ready to be filled.

Also any known method (casting, machining, construction of concrete and others ) make a blank matrix (punch, clamp). While working profile of the workpiece underestimate so that when the block Assembly (PM+MM) between the RM and the workpiece shaping element (FOZ) was provided with a gap from 2 to 6 mm depending on the dimensions of the molded parts, their structural complexity and the desired durability of the stamp. The required dimensional accuracy and surface FOA can be no higher than 17-18 degree (see Fig.2).

Produce draft (primary) machining the billet FOE of the lateral surfaces, remove technological profits. Degrease forming the surface of the workpiece and, if necessary, cover it with an adhesive (ground) (Fig.2).

After the initial processing of the workpiece assemble the unit, setting the over stocking of FAA prepared a working model with a gap equal to t is s (see Fig.3).

Through the main (diluting) Gating channel at a slight excess pressure (0.01 to 0.2 MPa) to produce a filled polymer composition in the formed cavity. For best fill the cavity temperature of the polymer (for example, epoxypolyester 100: 120 with 10% additive of disulfit molybdenum) support constant equal 77-83aboutC. in Addition, better filling of the cavity facilitates the application at the time of filling the low-frequency vibrations to assembled unit (PM+MM).

After filling the cavity produce polymerization and thermal processing of the composition at a temperature of 100-110aboutC and a pressure of 0.01 to 0.02 MPa to complete curing of the polymer within 48 hours

Make disassembly of the unit and, if necessary, the finish machining of the obtained molding surface coated with a polymer layer. Next, carry out mechanical handling of all non-working (nesporoobrazuyushchikh) surfaces obtained FAA (reference side), rastaivaya hole hubs, speakers, latches, cargo screws etc.

Received FAA used for the manufacture of a response FOE (punch, litoprime). For this molding paste over the surface of the obtained Poeta stamp together to carry out a manual revision of the assembled package (matrix + punch, matrix + punch + listoption) in order to achieve the desired parallelism of the supporting surfaces, alignment of columns and bushings, perpendicularity of the axes of the columns relative to the reference surfaces of the matrix and punch, the permanence of the working gap between the molding surfaces of the matrix and punch equal to the thickness of the formed metal sheet.

Test made stamp and, if necessary, subsequent revision of the stamp and its individual elements.

More sophisticated is the method of manufacturing a stamp without prior production of MM and PM, as well as significant when the difference between the configuration of the obtained molding surface of the workpiece, FOE from the configuration of the molded part.

In this case, any of the known methods used for the preparation of matrix low profile. It does not try to ensure the accuracy of the dimensions of the shaping surface and its configuration.

Paste over the shaping surface of the obtained billet wax sheet (paper, cloth, coated with a layer of plaster or other curable material, providing a layer thickness greater than the thickness of the molded sheet metal as my further for the production of a working lining of FOE. Produce lubrication of the resulting surface with a release composition.

Forming a sealed box by attaching the walls to the outside surfaces of the billet FOE to prevent leakage curable composition (plaster, cement, polymer compositions) in the process of manufacturing promodel (PM) and its heat treatment (see Fig.6). In the resulting box fill in one of the traditionally used compositions and ensure its full cure.

Make development drenched unit, the Department received PM from the billet FOE. Remove temporary intermediate layer previously deposited on the forming surface of the billet FOE. Degrease forming surface and put on her adhesive (ground). Applied to the working surface PM anti-adhesive composition.

Re assemble the unit, setting the PM over the workpiece FOE with a gap equal to the thickness of the working of the polymer composition. Close up the gap, make out the vents and Gating channels (see Fig.7) produce a filled polymer composition formed in the cavity and heat treatment.

Disassemble the unit, remove the received FOE, remove the sprue. Then make available the AI milling, grinding, polishing (Fig.4), as well as mechanical processing outside surfaces.

Received FAA also used for the manufacture of a response FOE (punch, litoprime).

After fabrication of all parts of the stamp together to carry out a manual revision of the assembled package (matrix + punch, matrix + punch + listoption) in order to achieve the desired parallelism of the supporting surfaces, alignment of columns and bushings, perpendicularity of the axes of the columns relative to the reference surfaces of the matrix and punch, the permanence of the working gap between the molding surfaces of the matrix and punch equal to the thickness of formed sheet metal.

1. A method of manufacturing a stamp for stamping sheet metal parts, which consists in the manufacture of a shaping element stamp and education using the master model polymer layer, characterized in that they form a cavity between the molding element of the stamp and the master model by setting the master model on formative element of the stamp with a gap, the formation of the polymer layer is performed by the injection of the polymer in the liquid state in the formed cavity with pelaut for making mates stamp.

2. The method according to p. 1, characterized in that as the master model using promodel obtained by applying a curable layer of material on the forming element of the stamp, and the thickness of the applied curable layer shall not be less than twice the thickness of the formed sheet metal.

3. Method p. 1 or 2, characterized in that the polymer used as epoxypolyester 100:120 with 10% additive of disulfit molybdenum.

4. The method according to PP. 1 to 3, characterized in that during injection of the polymer support its temperature is 77 83oC.

5. The method according to any of paragraphs. 1 to 4, characterized in that the polymerization is carried out at a temperature of 100 110oAnd pressure 0,101 is 0.102 MPa.

 

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