Internal high pressure extrusion molding device and internal high pressure and extrusion synchronous molding process

Abstract

The invention discloses an internal high-pressure extrusion molding device and an internal high-pressure extrusion synchronous molding process thereof, wherein the internal high-pressure extrusion molding device comprises a cover plate, a base and at least two bulging water-sealing components, an upper mold cavity is opened at the bottom of the cover plate, a lower mold cavity corresponding to the upper mold cavity is opened at the top of the base, and the upper mold cavity can cover the lower mold cavity; one of the bulging water-sealing components is arranged on the left side of the casting cavity, and the other bulging water-sealing component is arranged on the right side of the casting cavity; an extrusion molding module for extruding and molding the profile is arranged inside the upper mold cavity and the lower mold cavity; the beneficial effect is: through such a design, it can be effectively avoided that in the actual production process, after the blank completes the first molding process, the processed profile needs to be taken out and transferred to the second molding mold for secondary molding, thereby resulting in large tolerances, low quality, the need to use multiple molds, high processing costs, and reduced processing efficiency.

Description

[0001] This invention relates to the field of mold technology, and in particular to an internal high-pressure extrusion molding device and its internal high-pressure and extrusion synchronous molding process. Background Technology

[0002] Current technology generally involves heating the product and then forming it through roll forming. However, this technology has many problems and drawbacks: it requires more and heavier raw materials to process; the deformation tolerance of products formed by heated roll forming is relatively large, so more processing allowance is needed in subsequent processing to meet the product's dimensional requirements, thus increasing the material cost; in addition, traditional heated roll forming process is prone to delamination or internal cracks due to bending deformation, some of which are only discovered in later processing stages, resulting in a low pass rate, low production efficiency, and high costs, such as high heating power consumption and high scrap rate; the product forming process requires many steps, such as heating and roll forming. As we all know, the more steps a product has to go through, the lower the production efficiency, the lower the pass rate, and the higher the cost. Summary of the Invention

[0003] To address the aforementioned shortcomings, the present invention aims to provide an internal high-pressure extrusion molding apparatus and its internal high-pressure and extrusion synchronous molding process that improves production efficiency, produces high-quality products, and reduces processing steps.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An internal high-pressure extrusion molding apparatus includes a cover plate, a base, and at least two expansion and sealing water-sealing assemblies. The cover plate has an upper mold cavity at its bottom, and the base has a lower mold cavity corresponding to the upper mold cavity at its top. The upper mold cavity can close with the lower mold cavity to form a casting cavity for placing profiles. One expansion and sealing water-sealing assembly is located on the left side of the casting cavity, and the other expansion and sealing water-sealing assembly is located on the right side of the casting cavity. The output ends of both expansion and sealing water-sealing assemblies can extend into the interior of the casting cavity. Both the upper mold cavity and the lower mold cavity are provided with extrusion molding modules for extruding and shaping the profiles.

[0006] Preferably, in the above-mentioned internal high-pressure extrusion molding device, the extrusion molding module includes an upper module and a lower module, the upper module being disposed inside the upper mold cavity, and the lower module being disposed inside the lower mold cavity.

[0007] Preferably, in the above-mentioned internal high-pressure extrusion molding device, the upper module includes an upper fixed cavity and an upper movable cavity, both of which are disposed inside the upper mold cavity, and the upper fixed cavity and the upper movable cavity are arranged opposite to each other.

[0008] Preferably, in the above-mentioned internal high-pressure extrusion molding device, the lower right corner of the upper fixed cavity and the lower left corner of the upper movable cavity are both provided with a first rounded chamfer.

[0009] Preferably, in the above-mentioned internal high-pressure extrusion molding device, the lower module includes a lower fixed cavity and a lower movable cavity, both of which are disposed inside the lower mold cavity, and the upper fixed cavity and the upper movable cavity are disposed opposite to each other.

[0010] Preferably, in the above-mentioned internal high-pressure extrusion molding device, the lower right corner of the lower fixed cavity and the lower left corner of the lower movable cavity are both provided with a second rounded chamfer.

[0011] Preferably, in the aforementioned internal high-pressure extrusion molding device, the bottom of the cover plate is provided with two first semi-circular guide grooves, one of which is located at the left end of the cover plate and the other at the right end of the cover plate, and the two first semi-circular guide grooves communicate with the upper mold cavity; the top of the base is provided with two second semi-circular guide grooves, one of which is located at the left end of the base and the other at the right end of the base, and the two second semi-circular guide grooves communicate with the lower mold cavity; after the two first semi-circular guide grooves and the two second semi-circular guide grooves are closed, a water sealing channel is formed, and the output ends of the two expansion water sealing components can extend into the interior of the casting cavity through the water sealing channel.

[0012] Preferably, in the above-mentioned internal high-pressure extrusion molding device, the expansion sealing water assembly includes a transmission cylinder and a water outlet pipe, the output end of the transmission cylinder is connected to the water outlet pipe, and the output end of the transmission cylinder is adapted to the sealing water channel.

[0013] A process for simultaneous internal high pressure and extrusion molding, characterized by the following steps in sequence:

[0014] A. Placing the blank: First, place the machined blank inside the casting cavity;

[0015] B. Blank forming: The output ends of the two expansion sealing components extend into the interior of the casting cavity at the same time. During the extension process, the two expansion sealing components continuously inject water into the interior of the casting cavity, so that the blank placed in the casting cavity can be expanded and formed at the same time the profile can be extruded through the extrusion forming modules provided in the upper and lower mold cavities.

[0016] C. Unloading: After completing the above steps, open the cover and take out the shaped profile.

[0017] 10. The internal high-pressure and extrusion simultaneous molding process according to claim 1, characterized in that: step B further includes the following steps:

[0018] Step B1: During the blank forming process, the profile is extruded and formed by the first and second rounded chamfers provided in the extrusion forming module, while avoiding the generation of burrs.

[0019] The beneficial effects of this invention are:

[0020] (1) First, after the cover plate and the base are put together, the upper mold cavity of the cover plate and the lower mold cavity of the base form a casting cavity for placing the blank to be processed. After the output end of the two expansion sealing components extends into the inside of the casting cavity, the expansion sealing components are used to inject water and seal water. When the expansion sealing components continuously inject water into the inside of the casting cavity, the blank inside the casting cavity is water-expanded and formed. Therefore, this design improves the processing efficiency of the profile.

[0021] (2) Since the upper mold cavity and the lower mold cavity are equipped with extrusion molding modules, the extrusion molding modules can be used to perform a second molding process on the profile that has completed the water expansion molding. Therefore, the purpose of one-time molding of the profile can be achieved. This design can effectively avoid the need to take out the processed profile and transfer it to the second molding mold for secondary shaping after the blank has completed the first molding process in the actual production process. This results in large tolerances, low quality, the need to use multiple molds, high processing costs, and reduced processing efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0023] Figure 2 A cross-sectional view of one embodiment of the present invention;

[0024] Figure 3 for Figure 2 A magnified view of a section AA in the middle.

[0025] The components include: cover plate 11, base 12, expansion sealing water assembly 13, casting cavity 16, extrusion molding module 17, upper module 18, lower module 19, upper fixed cavity 20, upper movable cavity 21, first arc chamfer 22, lower fixed cavity 23, lower movable cavity 24, second arc chamfer 25, first semi-circular guide groove 26, second semi-circular guide groove 27, sealing water channel 28, transmission cylinder 29, and water outlet pipe 30. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] like Figures 1 to 3 As shown, an internal high-pressure extrusion molding apparatus includes a cover plate 11, a base 12, and at least two expansion sealing components 13. The cover plate 11 has an upper mold cavity at its bottom, and the base 12 has a lower mold cavity corresponding to the upper mold cavity at its top. The upper mold cavity can cover the lower mold cavity to form a casting cavity 16 for placing the profile. One expansion sealing component 13 is located on the left side of the casting cavity 16, and the other expansion sealing component 13 is located on the right side of the casting cavity 16. The output ends of both expansion sealing components 13 can extend into the interior of the casting cavity 16. The interiors of the upper and lower mold cavities... Each is equipped with an extrusion molding module 17 for extruding and shaping the profile. After the cover plate 11 and the base 12 are first closed together, the upper mold cavity of the cover plate 11 and the lower mold cavity of the base 12 form a casting cavity 16 for placing the blank to be processed. After the output ends of the two expansion sealing components 13 extend into the inside of the casting cavity 16, water is injected and sealed through the expansion sealing components 13. When the expansion sealing components 13 continuously inject water into the inside of the casting cavity 16, the blank inside the casting cavity 16 achieves water expansion molding. Therefore, this design improves the processing efficiency of the profile.

[0031] In some embodiments of the internal high-pressure extrusion molding apparatus, the upper mold cavity and the lower mold cavity are provided with extrusion molding modules 17. The extrusion molding modules 17 can perform a second molding process on the profile that has completed the water expansion molding, thus achieving the purpose of one-time molding of the profile. This design can effectively avoid the need to take out the processed profile after the blank has completed the first molding process and transfer it to the second molding mold for secondary shaping in the actual production process. This avoids the large tolerance, low quality, need to use multiple molds, increase processing costs, and reduce processing efficiency.

[0032] The internal high-pressure extrusion molding device in this embodiment includes an extrusion molding module 17 comprising an upper module 18 and a lower module 19. The upper module 18 is disposed inside the upper mold cavity, and the lower module 19 is disposed inside the lower mold cavity. The upper module 18 includes an upper fixed cavity 20 and an upper movable cavity 21, both of which are disposed inside the upper mold cavity and are arranged opposite to each other. The lower module 19 includes a lower fixed cavity 23 and a lower movable cavity 24, both of which are disposed inside the lower mold cavity and are arranged opposite to each other. This design can effectively avoid the risk of extrusion offset or extrusion asymmetry during the secondary extrusion molding process of the molded profile.

[0033] It is worth noting that the lower right corner of the upper fixed cavity 20 and the lower left corner of the upper movable cavity 21 are provided with a first rounded chamfer 22; the lower right corner of the lower fixed cavity 23 and the lower left corner of the lower movable cavity 24 are provided with a second rounded chamfer 25. This design can reduce the generation of burrs during the extrusion molding process of the profile, and also reduce the chamfering steps, saving processes and reducing the workload of workers.

[0034] In this embodiment, the internal high-pressure extrusion molding device has two first semi-circular guide grooves 26 at the bottom of the cover plate 11. One of the first semi-circular guide grooves 26 is located at the left end of the cover plate 11, and the other is located at the right end of the cover plate 11. Both first semi-circular guide grooves 26 are connected to the upper mold cavity. The top of the base 12 has two second semi-circular guide grooves 27. One of the second semi-circular guide grooves 27 is located at the left end of the base 12, and the other is located at the right end of the base 12. Both second semi-circular guide grooves 27 are connected to the lower mold cavity. After the two first semi-circular guide grooves 26 and the two second semi-circular guide grooves 27 are closed, a water sealing channel 28 is formed. The output ends of the two expanding water sealing components 13 can extend into the interior of the casting cavity 16 through the water sealing channel 28. This design plays a role in positioning and guiding the output ends of the expanding water sealing components 13, preventing the output ends of the expanding water sealing components 13 from shifting during the extension process.

[0035] In this embodiment, the internal high-pressure extrusion molding device includes an expansion sealing water assembly 13 comprising a transmission cylinder 29 and a water outlet pipe 30. The output end of the transmission cylinder 29 is connected to the water outlet pipe 30, and the output end of the transmission cylinder 29 is adapted to the sealing water channel 28. This design makes it easier for the transmission cylinder 29 to send the water outlet pipe 30 into the mold cavity 16 for injection and sealing.

[0036] A process for simultaneous internal high pressure and extrusion molding, wherein the steps include, in sequence:

[0037] A. Placing the blank: First, place the machined blank inside the casting cavity 16;

[0038] B. Blank forming: The output ends of the two expansion sealing components 13 extend into the interior of the casting cavity at the same time. During the extension process, the two expansion sealing components 13 continuously inject water into the interior of the casting cavity 16, so that the blank placed in the casting cavity 16 can be expanded and formed at the same time the profile can be extruded through the extrusion forming module 17 provided in the upper mold cavity and the lower mold cavity.

[0039] C. Unloading: After completing the above steps, open the cover and take out the shaped profile.

[0040] The simultaneous internal high pressure and extrusion molding process in this embodiment is characterized by the following step: Step B further includes the following steps:

[0041] Step B1: During blank forming, the profile is extruded and formed by the first rounded chamfer 22 and the second rounded chamfer 25 provided in the extrusion forming module 17, while avoiding the generation of burrs.

[0042] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. An internal high-pressure extrusion molding device, comprising a cover plate, a base and at least two bulging water sealing components, characterized in that: An upper mold cavity is formed at the bottom of the cover plate, and a lower mold cavity corresponding to the upper mold cavity is formed at the top of the base. The upper mold cavity can cover the lower mold cavity to form a casting cavity for placing the profile; One of the bulging water sealing components is arranged on the left side of the casting cavity, and the other bulging water sealing component is arranged on the right side of the casting cavity, and the output ends of the two bulging water sealing components can extend into the interior of the casting cavity; The upper mold cavity and the lower mold cavity are both provided with extrusion molding modules for extruding and shaping the profile.

2. The internal high pressure extrusion molding device according to claim 1, characterized in that: The extrusion molding module includes an upper module and a lower module, wherein the upper module is arranged inside the upper mold cavity, and the lower module is arranged inside the lower mold cavity.

3. The internal high pressure extrusion molding device according to claim 2, characterized in that: The upper mold block includes an upper fixed cavity and an upper movable cavity. The upper fixed cavity and the upper movable cavity are both arranged inside the upper mold cavity, and the upper fixed cavity and the upper movable cavity are arranged opposite to each other.

4. The internal high pressure extrusion molding device according to claim 3, characterized in that: A first arc chamfered portion is provided at the lower right corner of the upper fixed cavity and the lower left corner of the upper movable cavity.

5. The internal high pressure extrusion molding device according to claim 2, characterized in that: The lower die block comprises a lower fixed cavity and a lower movable cavity, the lower fixed cavity and the lower movable cavity are both arranged inside the lower mold cavity, and the upper fixed cavity and the upper movable cavity are arranged opposite to each other.

6. The internal high pressure extrusion molding device according to claim 5, characterized in that: A second arc chamfered portion is provided at the lower right corner of the lower fixed cavity and the lower left corner of the lower movable cavity.

7. The internal high pressure extrusion molding device according to claim 1, characterized in that: The bottom of the cover plate is provided with two first semicircular guide grooves, one of which is provided at the left end of the cover plate, and the other is provided at the right end of the cover plate, and the two first semicircular guide grooves are communicated with the upper mold cavity; Two second semicircular guide grooves are arranged on the top of the base, wherein one of the second semicircular guide grooves is arranged at the left end of the base, and the other second semicircular guide groove is arranged at the right end of the base, and the two second semicircular guide grooves are connected to the lower mold cavity; After the two first semicircular guide grooves and the two second semicircular guide grooves are covered, a water sealing channel is formed, and the output ends of the two bulging water sealing assemblies can extend to the inside of the casting cavity through the water sealing channel.

8. The internal high pressure extrusion molding device according to claim 1, characterized in that: The bulging water sealing component comprises a transmission cylinder and a water outlet pipe, the output end of the transmission cylinder is connected to the water outlet pipe, and the output end of the transmission cylinder is adapted to the water sealing channel.

9. An internal high pressure and extrusion synchronous molding process, characterized in that: The steps include: A. Place the blank: First, place the processed blank inside the casting cavity; B. Blank forming: The output ends of the two bulging water sealing components extend into the interior of the mold cavity at the same time, and during the extension process, the two bulging water sealing components continuously inject water into the interior of the mold cavity, so that the processed blank placed in the mold cavity can be subjected to a bulging process while the profile is subjected to an extrusion process through the extrusion molding modules provided in the upper mold cavity and the lower mold cavity; C. Discharging: After completing the above steps, open the cover and take out the shaped profile.

10. The internal high pressure and extrusion synchronous molding process according to claim 1, characterized in that: The step B also includes the following steps: Step B1: When the blank is being formed, the profile is extruded through the first arc chamfered portion and the second arc chamfered portion provided by the extrusion molding module while avoiding the generation of burrs.

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