CN117325435A - Compression molding test die and manufacturing method and using method thereof - Google Patents

Abstract

The invention discloses a die-pressing test die, a manufacturing method and a using method thereof, wherein the die-pressing test die comprises an upper die and a lower die, the lower die comprises a plate-shaped lower die core and a lower die frame arranged on the back of a parting surface of the lower die core, the lower die core comprises a main body and a plurality of inserts, and the inserts and the main body are combined to form a water cutting track gap. The invention provides a mould pressing test mould, which is characterized in that the test mould has a lower service life than a mass production mould, and the hollow frame structure of a plate-shaped mould core frame is used as an upper mould and a lower mould, so that the use of mould materials is reduced, and the production cost is reduced.

Description

Compression molding test die and manufacturing method and using method thereof

Technical Field

The invention relates to the technical field of test dies, in particular to a compression test die, a manufacturing method and a using method thereof.

Background

Most felt-like automobile parts, such as automobile wheel covers, carpets, left and right side trim parts of luggage cases and bottom shields, are molded by a compression molding process. Taking a carpet as an example, the manufacturing process of the compression molding carpet is as follows: firstly, heating the surface fabric, then placing the heated surface fabric into a mould, pressing the surface fabric into shape under the action of a press, cooling, opening the mould, and taking out the formed carpet.

After the molding is finished, the molded interior trim part is required to be cut, and redundant leftover materials are removed. There are several common cutting modes: the high-pressure water cutting robot cutting, knife edge die cutting and forming cutting are completed at one time. The high-pressure water cutting robot is used for cutting molded interior trim parts on the water cutting support die, and cutting is performed according to a preset cutting program, so that the mode is efficient and stable, the later size adjustment is convenient, and the high-pressure water cutting robot is commonly used for cutting large-scale interior trim parts such as main carpets of automobile cabins. The knife edge die cutting is to firstly manufacture a pair of knife edge dies processed according to three-dimensional data of the parts, then position the molded interior trim parts on the dies, and complete cutting through a downlink press. The mode has the advantages of high processing precision and short working time, and is commonly used for cutting trunk wheel covers and main carpets. The one-time completion of forming and cutting means that a top-cut knife edge is manufactured on a forming die according to three-dimensional data of the part, and trimming can be completed by die pressing during forming. The mode is easy to operate and is commonly used for cutting interior trim parts such as cover interior trim parts, roof trim panels, front surrounding plates and the like.

Because felt automobile parts material is comparatively special, the product is difficult to verify appearance and structure through 3D printing, CNC processing or silica gel compound die technology processing hand plate at the initial stage of research and development. To reduce the risk of design and save development costs, felt-like parts typically need to be machined through a test die to verify the design prior to mass production. Most of the existing test dies adopt CNC to process wood to prepare upper and lower dies, the wood needs to be dense in texture, the material cost and the processing cost are high, and the cost of the test dies needs to be further reduced.

Disclosure of Invention

The present invention aims to solve one of the technical problems in the related art to a certain extent. Therefore, the invention provides a mould for a mould pressing test.

The invention also provides a manufacturing method of the compression molding test die.

The invention also provides a using method of the compression molding test die.

The technical scheme adopted by the invention is as follows: the utility model provides a mould pressing test mould, including last mould and bed die, the bed die includes platelike lower mould benevolence and installs the lower die carrier at lower mould benevolence die joint face back, wherein the lower mould benevolence is including main part and a plurality of insert, just the insert with the main part combination forms water cutting orbit gap.

After adopting above structure, because the test mould is lower than the required life of mass production mould, this application is through the hollow frame construction of platelike mould benevolence frame as upper and lower mould, has reduced the use of mould material, reduction in production cost. And the lower die core is provided with a water cutting track gap, so that the lower die core can be used as a water cutting support die, the effect of multiple purposes of one die is achieved, the investment of cutting cost in the process of verifying the design of felt parts is avoided, and the competitiveness of the product is improved.

According to one embodiment of the invention, the water cutting track gap width is 5-15mm; the width of the water cutting track gap is larger than the cutting width of the water cutting, and the width of the water column sprayed by the water cutting device can be adjusted between 0.1 mm and 1.5 mm in general.

According to one embodiment of the invention, the insert is mounted on the lower die frame by means of a support bar.

According to one embodiment of the invention, the lower die core is made of glass fiber reinforced plastic, and/or the lower die frame is formed by connecting stainless steel; in the water cutting process, the lower die carrier may be stained with water sprayed by the water cutting equipment, and stainless steel can reduce the rusting probability of the lower die carrier and prolong the service life. The lower die core made of glass fiber reinforced plastic has the advantages of high molding speed, low cost, light weight and good corrosion resistance. Therefore, the lower die core made of the glass fiber reinforced plastic material can improve the production efficiency, reduce the production cost and prolong the service life.

According to one embodiment of the invention, the upper die comprises a plate-shaped upper die core and an upper die frame arranged on the back surface of the parting surface of the upper die core, and the upper die core is made of glass fiber reinforced plastic; similarly, the lower die core made of the glass fiber reinforced plastic material has the advantages of high molding speed, low cost, light weight and good corrosion resistance.

According to one embodiment of the invention, the upper die core and/or the lower die core are/is carved with theoretical dimension lines and dimension tolerance lines which are the same as the shape of the formed part; the upper die core and/or the lower die core can be used as a checking fixture, so that the application of the test die is expanded, and the checking fixture does not need to be additionally designed in the product development process, so that the product development cost is further reduced.

According to one embodiment of the invention, the upper die frame is provided with a first forklift hole, and/or the lower die frame is provided with a second forklift hole; the setting in fork truck hole is convenient for fork truck fork to fork up mould or bed die.

According to one embodiment of the invention, the lower die further comprises a circle of hanging nails which are arranged around the periphery of the lower die core; the hanging nails are used for fixing the fabric on the die and preventing the fabric from being wrinkled in the die closing process.

The manufacturing method of the compression molding test die comprises the following steps:

s11, processing a waxy profiling through CNC;

s12, manually pasting and forming an upper die core and/or a lower die core made of glass fiber reinforced plastic on the surface of the profiling;

s13, installing the upper die core on an upper die frame and/or installing the lower die core on a lower die to form the upper die and the lower die respectively.

The application method of the compression molding test die comprises the following steps:

s21, placing the fabric on a lower die, and closing the die and performing compression molding;

s22, after the die is opened, transferring the lower die with the formed part to a water cutting position, and performing water cutting operation by using the lower die as a water cutting supporting die;

and S23, after the water cutting is completed, taking down the molded part, and transferring the lower die to an initial position.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a molded article according to an embodiment of the present invention;

FIG. 2 is a perspective view of a mold for a compression test in accordance with an embodiment of the present invention;

FIG. 3 is a perspective view of a mold opening of a compression test mold according to an embodiment of the present invention;

FIG. 4 is a perspective view of an upper mold in an embodiment of the invention;

FIG. 5 is a schematic view of the structure of the upper mold in the embodiment of the invention;

FIG. 6 is a perspective view of a lower mold according to an embodiment of the present invention;

FIG. 7 is a schematic view of a lower mold according to an embodiment of the present invention;

FIG. 8 is a bottom view of a compression test mold in an embodiment of the invention;

fig. 9 is a partial enlarged view at a in fig. 8.

The reference numerals in the figures illustrate:

1. a molding member; 2. an upper die; 3. a lower die;

21. an upper die core; 22. a die carrier is arranged; 23. positioning holes; 24. a first forklift aperture;

31. a lower die core; 32. a lower die frame; 33. positioning columns; 34. a second fork hole; 35. hanging material nails; 36. water grooving; 37. a support rod;

31a, a main body; 31b, insert.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As shown in fig. 2-9, in this embodiment, a compression molding test mold is disclosed, including an upper mold and a lower mold, where the lower mold includes a plate-shaped lower mold core and a lower mold frame installed on the back of a parting surface of the lower mold core, where the lower mold core includes a main body and a plurality of inserts, and the inserts and the main body are combined to form a water cutting track gap.

Further, as shown in connection with fig. 1-3, in this embodiment, the molded part is an automotive carpet in a felt-type automotive part. Before compression molding, the fabric is heated and softened, and the heating temperature is specific to the middle framework layer material of the fabric. Common fabrics comprise pet needled carpet fabrics and PA tufted carpet fabrics, and the middle skeleton layer is generally formed by uniformly back-coating rubber plastic particles such as PE, PP, EVA, EPDM and the like on the carpet fabrics in a molten state to serve as skeleton materials for keeping the profiles, so that the carpet fabrics have good waterproof, sound-insulating and heat-insulating effects. In this embodiment, the middle skeleton layer is made of PE.

Further, in this embodiment, the lower die carrier specifically refers to a frame structure formed by welding profiles, which has low overall mass, high strength, and good stability and rigidity. The lower die carrier is used for supporting and positioning the upper die core so as to ensure the accuracy and stability of the die. The structure of the lower die carrier is usually assembled by welding, bolting and the like. The design of the lower die carrier needs to consider factors such as the size, the weight, the working condition and the like of the die so as to ensure that the lower die carrier has enough strength and stability.

Further, in order to increase the positioning accuracy of the upper die and the lower die, a positioning hole is formed in the upper die core, a positioning column is arranged on the lower die core, and the upper die and the lower die are accurately positioned through the matching of the positioning column and the column hole of the positioning hole. The positioning mode can ensure that the positions of the upper die and the lower die are accurate in assembly, and deviation and error in the assembly process are avoided.

Specifically, in this embodiment, the width of the gap of the water cutting track is 10mm, and the width of the water column sprayed by the water cutting device is 1mm. In other embodiments the water cut trace slit width is 5mm or 15mm.

Specifically, as shown in connection with fig. 8-9, the insert is mounted on the lower mold frame through a support rod.

Further, in this embodiment, the water cutting track slit formed by combining the insert and the body corresponds to the cutting groove, the cutting hole and the leftover material of the edge of the molding member in the middle of the molding member. In the design process, the superposition of the water cutting track and the lower die frame is avoided, and the lower die frame is prevented from being cut in the water cutting process.

Specifically, in this embodiment, as shown in fig. 6-7, the lower mold core is made of glass fiber reinforced plastic, the lower mold frame is formed by connecting stainless steel, the upper mold comprises a plate-shaped upper mold core and an upper mold frame installed on the back of the parting surface of the upper mold core, the upper mold core is made of glass fiber reinforced plastic, and the lower mold further comprises a circle of hanging nails surrounding the periphery of the lower mold core.

Specifically, in this embodiment, the parting surface of the upper mold core is engraved with a theoretical dimension line and a dimension tolerance line which are the same as the shape of the molded part. The size tolerance line comprises a positive tolerance line and a negative tolerance line, the upper die core is turned over through the turning mechanism in the using process, the parting surface of the upper die core faces, then the formed part is covered on the parting surface, and the shape and position detection can be carried out on the edge profile of the formed part, so that whether the formed part is qualified or not can be judged rapidly.

Similarly, in other embodiments, the parting surface of the lower mold core is engraved with a theoretical dimension line and a dimension tolerance line which are the same as the shape of the molded part. The forming part is directly covered on the parting surface of the lower die core, and the shape and position detection can be carried out on the edge profile of the forming part, so that whether the forming part is qualified or not can be rapidly judged.

Specifically, as shown in fig. 4-5, the upper die frame is provided with a first forklift hole, and the lower die frame is provided with a second forklift hole.

Further, in this embodiment, the first forklift hole is formed by a square tube section bar adapted to the forklift fork, and is horizontally disposed on the upper die frame, and the second forklift hole is formed by a square tube section bar adapted to the forklift fork, and is horizontally disposed on the lower die frame. In order to protect the internal structure of the lower die carrier, the edge of the lower die carrier is subjected to surrounding edge treatment in the embodiment.

In another embodiment, a method for manufacturing a compression molding test mold is disclosed, comprising the steps of:

s11, processing a waxy profiling through CNC;

s12, manually pasting and forming an upper die core and/or a lower die core made of glass fiber reinforced plastic on the surface of the profiling;

s13, installing the upper die core on an upper die frame and/or installing the lower die core on a lower die to form the upper die and the lower die respectively.

In another embodiment, a waxy master is firstly processed through CNC, a layer of release agent is coated on the surface of the master, the prepared resin mixture is coated on a model through a scraper or a brush, then a cut glass cloth or other reinforcing materials are paved on the model, the resin is forced to be immersed into the glass cloth through the scraper or the brush, air bubbles are discharged, after the reinforcing materials are soaked by the resin, a 2 nd layer of reinforcing materials are paved, the resin and the reinforcing materials are repeatedly coated until the required design layer number is reached, and then solidification, demoulding and trimming are carried out, so that a lower die core with the shape and the structural strength meeting design requirements is formed.

In another embodiment, a method of using a compression test mold is disclosed, comprising the steps of:

s21, placing the fabric on a lower die, and closing the die and performing compression molding;

s22, after the die is opened, transferring the lower die with the formed part to a water cutting position, and performing water cutting operation by using the lower die as a water cutting supporting die;

and S23, after the water cutting is completed, taking down the molded part, and transferring the lower die to an initial position.

Further, in step S21, the fabric is heated and softened in advance, the periphery of the fabric is hung on the hanging nails, the upper die and the lower die are driven to be closed by the press, and after the fabric is cooled to form a formed part, the die is opened.

Further, in step S22, the lower die is transferred to the water cutting position by the mechanical arm, and after the lower die frame and the water cutting position are precisely positioned, the high-pressure water cutting robot runs the programmed cutting program to cut along the track gap. And after the cutting is completed, the molded part is taken down and the scraps are removed. And then the molded part can be placed on the lower die again, and whether the molded part is qualified or not is rapidly judged by comparing the edge profile of the molded part with a theoretical dimension line and a dimension tolerance line.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above" and "over" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under," "under" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. The utility model provides a mould pressing test mould, includes mould and bed die, its characterized in that: the lower die comprises a plate-shaped lower die core and a lower die frame arranged on the back of the parting surface of the lower die core, wherein the lower die core comprises a main body and a plurality of inserts, and the inserts and the main body are combined to form a water cutting track gap.

2. A compression test mold as claimed in claim 1, wherein: the width of the water cutting track gap is 5-15mm.

3. A compression test mold as claimed in claim 1, wherein: the insert is arranged on the lower die frame through a supporting rod.

4. A compression test mold as claimed in claim 1, wherein: the lower die core is made of glass fiber reinforced plastic, and/or the lower die frame is formed by connecting stainless steel.

5. A compression test mold as claimed in claim 1, wherein: the upper die comprises a plate-shaped upper die core and an upper die frame arranged on the back surface of the parting surface of the upper die core, and the upper die core is made of glass fiber reinforced plastic.

6. The compression test mold of claim 5, wherein: and theoretical dimension lines and dimension tolerance lines which are the same as the shape of the formed part are engraved on the upper die core and/or the lower die core.

7. The compression test mold of claim 5, wherein: the upper die frame is provided with a first forklift hole, and/or the lower die frame is provided with a second forklift hole.

8. A compression test mold as claimed in claim 1, wherein: the lower die further comprises a circle of hanging nails which are arranged around the periphery of the lower die core in a surrounding mode.

9. A method of manufacturing a compression molding test mold according to any one of claims 1 to 8, comprising the steps of:

s11, processing a waxy profiling through CNC;

s12, manually pasting and forming an upper die core and/or a lower die core made of glass fiber reinforced plastic on the surface of the profiling;

s13, installing the upper die core on an upper die frame and/or installing the lower die core on a lower die to form an upper die and a lower die respectively.

10. A method of using the compression test mold according to any one of claims 1 to 8, comprising the steps of:

s21, placing the fabric on a lower die, and closing the die and performing compression molding;

s22, after the die is opened, transferring the lower die with the formed part to a water cutting position, and performing water cutting operation by using the lower die as a water cutting supporting die;

and S23, after the water cutting is completed, taking down the molded part, and transferring the lower die to an initial position.