A molding test mold and its manufacturing method and use method

Abstract

The present invention discloses a compression test mold and a manufacturing method and a use method thereof, wherein the compression test mold comprises an upper mold and a lower mold, wherein the lower mold comprises a plate-shaped lower mold core and a lower mold frame installed on the back of the parting surface of the lower mold core, wherein the lower mold 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 present invention provides a compression test mold, and since the service life of the test mold is lower than that required by the mass production mold, the present application uses a hollow frame structure of a plate-shaped mold core frame as the upper and lower molds, thereby reducing the use of mold materials and reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of test molds, and more specifically to a compression test mold and a manufacturing method and a use method thereof. Background Art

[0002] Most felt auto parts, such as wheel covers, carpets, trunk trims and underbody panels, are made using compression molding. Taking carpets as an example, the production process of compression molding carpets is as follows: first, the fabric is heated, then the hot fabric is placed in a mold, and the fabric is pressed into shape under the action of a press. After cooling, the mold is opened and the molded carpet is taken out.

[0003] After the molding is completed, the molded interior parts need to be cut to remove excess scraps. There are several common cutting methods: high-pressure water jet robot cutting, knife-edge mold cutting and molding cutting in one go. High-pressure water jet robot cutting is to place the molded molded interior parts on the water jet tray and cut them according to the preset cutting program. This method is efficient and stable, and it is easy to adjust the size later. It is often used to cut large interior parts such as the main carpet in the car cabin. Knife-edge mold cutting is to first make a knife-edge mold processed according to the three-dimensional data of the part, and then position the molded molded interior parts on the mold, and complete the cutting through the downward press. The advantages of this method are high processing accuracy and short working hours. It is often used to cut luggage wheel covers and main carpets. Molding cutting in one go means that the top-breaking knife edge is made on the molding mold according to the three-dimensional data of the part, and the trimming can be completed by molding during molding. This method is simple to operate and is often used to cut interior parts such as lid interiors, top trims, and front panels.

[0004] Since the materials of felt automotive parts are rather special, it is difficult to process prototypes through 3D printing, CNC processing or silicone molding to verify the appearance and structure in the early stages of product development. In order to reduce the risk of design solutions and save R&D costs, it is generally necessary to process felt parts through test molds to verify the design before mass production. Most of the existing test molds use CNC processed wood to prepare upper and lower molds. The wood needs to be dense, and the material cost and processing cost are high. There is an urgent need to further reduce the cost of test molds. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art to a certain extent. To this end, the present invention provides a molding test mold.

[0006] The invention also provides a method for manufacturing the above-mentioned compression molding test mold.

[0007] The invention also provides a method for using the compression molding test mold.

[0008] The technical solution adopted by the present invention is: to provide a molding test mold, including an upper mold and a lower mold, the lower mold includes a plate-shaped lower mold core and a lower mold frame installed on the back of the parting surface of the lower mold core, wherein the lower mold core includes a main body and a plurality of inserts, and the inserts are combined with the main body to form a water cutting track gap.

[0009] After adopting the above structure, since the service life of the test mold is lower than that of the mass production mold, the present application uses a hollow frame structure of a plate-shaped mold core as the upper and lower molds, which reduces the use of mold materials and reduces production costs. In addition, the lower mold core has a water cutting track gap, which can be used as a water cutting support mold to achieve a one-mold-for-multiple-purposes effect, thereby avoiding the investment of cutting costs in the process of verifying the design of felt parts and improving the competitiveness of the product.

[0010] According to one embodiment of the present invention, the water cutting track gap width is 5-15 mm; the water cutting track gap width is greater than the cutting width of the water cutting. Normally, the width of the water column sprayed by the water cutting equipment can be adjusted between 0.1 mm and 1.5 mm.

[0011] According to one embodiment of the present invention, the insert is mounted on the lower mold frame via a support rod.

[0012] According to one embodiment of the present invention, the lower mold core is made of glass fiber reinforced plastics, and / or the lower mold frame is connected by stainless steel; during the water cutting process, the lower mold frame may be contaminated with water sprayed by the water cutting equipment, and the use of stainless steel can reduce the probability of rusting of the lower mold frame and increase the service life. The lower mold core made of glass fiber reinforced plastics has a fast molding speed, low cost, light weight, and good corrosion resistance. Therefore, the use of the lower mold core made of glass fiber reinforced plastics can improve production efficiency, reduce production costs, and has a longer service life.

[0013] According to one embodiment of the present invention, the upper mold includes a plate-shaped upper mold core and an upper mold frame installed on the back of the parting surface of the upper mold core, and the upper mold core is made of fiberglass. Similarly, the lower mold core made of fiberglass has a fast molding speed, low cost, light weight, and good corrosion resistance.

[0014] According to one embodiment of the present invention, the upper mold core and / or the lower mold core are engraved with theoretical dimension lines and dimension tolerance lines that are the same as the shape of the molded part; that is, the upper mold core and / or the lower mold core in the present invention can be used as a gauge, which expands the use of the test mold. During the product development process, there is no need to design additional gauges, further reducing product research and development costs.

[0015] According to one embodiment of the present invention, the upper mold frame is provided with a first forklift hole, and / or the lower mold frame is provided with a second forklift hole; the forklift holes are provided to facilitate forklift forks to lift the upper mold or the lower mold.

[0016] According to one embodiment of the present invention, the lower mold further comprises a circle of hanging pins arranged around the outer circumference of the lower mold core; the hanging pins are used to fix the fabric on the mold and prevent the fabric from wrinkling during the mold closing process.

[0017] A method for making a compression molding test mold comprises the following steps:

[0018] S11, CNC machine the wax master mold;

[0019] S12, forming an upper mold core and / or a lower mold core made of glass fiber reinforced plastic by hand lay-up on the mold surface;

[0020] S13, installing the upper mold core on the upper mold frame, and / or installing the lower mold core on the lower mold, to form the upper mold and lower mold respectively.

[0021] A method for using a compression molding test mold comprises the following steps:

[0022] S21, placing the fabric on the lower mold, closing the mold and molding;

[0023] S22, after the mold is opened, the lower mold with the molded part is transferred to the water cutting position, and the lower mold is used as a water cutting support mold for water cutting operation;

[0024] S23. After the water jet cutting is completed, the molded part is removed and the lower mold is transferred to the initial position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a three-dimensional diagram of a molded part in an embodiment of the present invention;

[0027] Figure 2 It is a three-dimensional diagram of the mold compression test mold when the mold is closed in the embodiment of the present invention;

[0028] Figure 3 It is a three-dimensional diagram of the molding test mold when the mold is opened in the embodiment of the present invention;

[0029] Figure 4A three-dimensional diagram of an upper mold in an embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of an upper mold in an embodiment of the present invention;

[0031] Figure 6 A three-dimensional diagram of a lower mold in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the lower mold in an embodiment of the present invention;

[0033] Figure 8 A bottom view of a compression molding test mold in an embodiment of the present invention;

[0034] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0035] Description of the numbers in the figure:

[0036] 1. Molded part; 2. Upper mold; 3. Lower mold;

[0037] 21. Upper mold core; 22. Upper mold frame; 23. Positioning hole; 24. First forklift hole;

[0038] 31. Lower die core; 32. Lower die frame; 33. Positioning column; 34. Second forklift hole; 35. Hanging nail; 36. Water cutting groove; 37. Support rod;

[0039] 31a, main body; 31b, inlay. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] like Figure 2-9 As shown, in this embodiment, a molding test mold is disclosed, including an upper mold and a lower mold, wherein the lower mold includes a plate-shaped lower mold core and a lower mold frame installed on the back side of the parting surface of the lower mold core, wherein the lower mold core includes a main body and a plurality of inserts, and the inserts are combined with the main body to form a water cutting track gap.

[0042] Furthermore, combined with Figure 1-3As shown, in this embodiment, the molded part is a car carpet among felt-type automobile parts. Before the molding is performed, the fabric is first heated and softened, and the heating temperature depends on the material of the intermediate skeleton layer of the fabric. Common fabrics include PET needle-punched carpet fabrics and PA tufted carpet fabrics. The intermediate skeleton layer generally uses PE, PP, EVA, EPDM and other rubber and plastic particles heated to a molten state and evenly back-coated on the carpet fabric as a skeleton material for maintaining the profile, which has good waterproof, sound insulation and heat insulation effects. In this embodiment, the intermediate skeleton layer is made of PE material.

[0043] Further, in this embodiment, the lower mold frame specifically refers to a frame structure formed by welding profiles, which has low overall mass, high strength, good stability and rigidity. The lower mold frame is used to support and position the upper mold core to ensure the accuracy and stability of the mold. The structure of the lower mold frame is usually assembled by welding, bolting, etc. The design of the lower mold frame should take into account factors such as the size, weight and working conditions of the mold to ensure that the lower mold frame has sufficient strength and stability.

[0044] Furthermore, in order to increase the positioning accuracy of the upper mold and the lower mold, a positioning hole is provided on the upper mold core, and a positioning column is provided on the lower mold core. The positioning column cooperates with the column hole of the positioning hole to achieve accurate positioning of the upper mold and the lower mold. This positioning method can ensure the accurate position of the upper mold and the lower mold during assembly, avoiding deviations and errors during the assembly process.

[0045] Specifically, in this embodiment, the water cutting track gap width is 10mm, and the water column width sprayed by the water cutting device is 1mm. In other embodiments, the water cutting track gap width is 5mm or 15mm.

[0046] Specifically, combined Figure 8-9 As shown, the insert is mounted on the lower mold frame via a support rod.

[0047] Furthermore, in this embodiment, the water cutting track gap formed by the combination of the insert and the body corresponds to the cutting groove and cutting hole in the middle of the molded part and the scraps at the edge of the molded part. In the design process, it is avoided that the water cutting track overlaps with the one formed on the lower mold frame, and the lower mold frame is avoided from being cut during the water cutting process.

[0048] Specifically, combined Figure 6-7 As shown, in this embodiment, the lower mold core is made of fiberglass, the lower mold frame is connected by stainless steel, the upper mold includes 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 fiberglass, and the lower mold also includes a circle of hanging nails arranged around the outer periphery of the lower mold core.

[0049] Specifically, in this embodiment, the parting surface of the upper mold core is engraved with theoretical dimension lines and dimension tolerance lines of the same shape as the molded part. The dimension tolerance lines include positive tolerance lines and negative tolerance lines. During use, the upper mold core is first flipped through the flipping mechanism to make the parting surface of the upper mold core face the same direction, and then the molded part is covered on the parting surface, so that the edge contour of the molded part can be detected in shape and position, so as to quickly determine whether the molded part is qualified.

[0050] Similarly, in other embodiments, the parting surface of the lower mold core is engraved with theoretical dimension lines and dimension tolerance lines of the same shape as the molded part. By directly covering the molded part on the parting surface of the lower mold core, the edge contour of the molded part can be detected in shape and position, thereby quickly judging whether the molded part is qualified.

[0051] Specifically, combined Figure 4-5 As shown, the upper mold frame is provided with a first forklift hole, and the lower mold frame is provided with a second forklift hole.

[0052] Furthermore, in this embodiment, the first forklift hole is composed of a square tube profile adapted to the forklift fork, which is horizontally arranged on the upper mold frame, and similarly, the second forklift hole is composed of a square tube profile adapted to the forklift fork, which is horizontally arranged on the lower mold frame. In order to protect the internal structure of the lower mold frame, the edge of the lower mold frame is surrounded in this embodiment.

[0053] In another embodiment, a method for making a compression molding test mold is disclosed, comprising the following steps:

[0054] S11, CNC machine the wax master mold;

[0055] S12, forming an upper mold core and / or a lower mold core made of glass fiber reinforced plastic by hand lay-up on the mold surface;

[0056] S13, installing the upper mold core on the upper mold frame, and / or installing the lower mold core on the lower mold, to form the upper mold and lower mold respectively.

[0057] In another embodiment, a wax master mold is first processed by CNC, and then a layer of mold release agent is applied to the surface of the master mold. The prepared resin mixture is then applied to the model with a scraper or a brush, and then the cut glass cloth or other reinforcing materials are laid thereon. The resin is forced to penetrate the glass cloth with a scraper or a brush to expel the bubbles. After the resin penetrates the reinforcing material, the second layer of reinforcing material is laid. The resin is repeatedly applied and the reinforcing material is laid until the required number of designed layers is reached. Then, the mold is cured, demolded and trimmed to form a lower mold core whose shape and structural strength meet the design requirements.

[0058] In another embodiment, a method for using a compression molding test mold is disclosed, comprising the following steps:

[0059] S21, placing the fabric on the lower mold, closing the mold and molding;

[0060] S22, after the mold is opened, the lower mold with the molded part is transferred to the water cutting position, and the lower mold is used as a water cutting support mold for water cutting operation;

[0061] S23. After the water jet cutting is completed, the molded part is removed and the lower mold is transferred to the initial position.

[0062] Furthermore, in step S21, the fabric is heated and softened in advance, and the fabric is hung on the hanging pins on all sides. The press drives the upper mold and the lower mold to close the mold, and after the fabric is cooled to form a molded part, the mold is opened.

[0063] Furthermore, in step S22, the lower mold is transferred to the water cutting position by the robot arm, and after the lower mold frame and the water cutting position are accurately positioned, the high-pressure water cutting robot runs the programmed cutting program to cut along the track gap. After the cutting is completed, the molded part is removed and the scraps are removed. After that, the molded part can be placed on the lower mold again, and the edge contour of the molded part is compared with the theoretical dimension line and the dimension tolerance line to quickly determine whether the molded part is qualified.

[0064] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A compression molding test mold, comprising an upper mold and a lower mold, Features: The lower mold comprises a plate-shaped lower mold core and a lower mold frame installed on the back of the parting surface of the lower mold core, wherein the lower mold core comprises a main body and a plurality of inserts, and the inserts are combined with the main body to form a water cutting track gap; 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, and the upper mold core is made of glass fiber reinforced plastic; The lower mold also includes a circle of hanging nails arranged around the outer periphery of the lower mold core; The upper die core and / or the lower die core are engraved with theoretical dimension lines and dimension tolerance lines that are the same as the shape of the molded part; The method for making the compression molding test mold comprises the following steps: S11, CNC machine the wax master mold; S12, forming an upper mold core and / or a lower mold core made of glass fiber reinforced plastic by hand lay-up on the mold surface; S13, installing the upper mold core on the upper mold frame, and / or installing the lower mold core on the lower mold, to form an upper mold and a lower mold respectively.

2. A compression molding test mold according to claim 1, Features: The water jet cutting track gap width is 5-15mm.

3. A compression molding test mold according to claim 1, Features: The insert is mounted on the lower mold frame via a support rod.

4. A compression molding test mold according to claim 1, Features: The lower mold core is made of glass fiber reinforced plastic, and / or the lower mold frame is connected by stainless steel.

5. A compression molding test mold according to claim 1, Features: The upper mold frame is provided with a first forklift hole, and / or the lower mold frame is provided with a second forklift hole.

Images