Wet headliner mold

Abstract

The utility model relates to car roof manufacturing technical field especially, relates to a kind of wet roof moulds. Wherein, wet roof mould includes: upper die body, lower die body and several stainless steel seamless steel pipes, upper die body and lower die body are cast iron parts, part stainless steel seamless steel pipe is buried in upper die body, another part stainless steel seamless steel pipe is buried in lower die body, heating oil is passed into in stainless steel seamless steel pipe, to make the heat of heating oil can be conducted to the working surface of upper die body and the working surface of lower die body. Compared with prior art, the wet roof mould adopts cast iron material, and traditional mould body bottom plate is saved, cost is reduced, stainless steel seamless steel pipe is pre-buried, heating mode of heating oil is used, the balance of heating can be improved, avoid temperature difference too large, prevent local temperature shock to cause product surface to appear pitting, improve product quality.

Description

Technical Field

[0001] This utility model relates to the field of automobile roof manufacturing technology, and in particular to a wet roof mold. Background Technology

[0002] Currently, the production processes for interior headliner components are generally divided into two types: dry and wet. The dry process uses hot materials and cold molds, while the wet process uses cold materials and hot molds. The mainstream wet headliner molds are mostly made of QT500-7 or 45 grade material. A few use cast aluminum with embedded water pipes, but the mold body strength is relatively poor and cannot meet the requirements of high-strength punching. Generally, QT500-7 molds are made of foam casting with thin walls, using electric heating plates and heating tubes. The heating components are expensive, and the heating process is prone to large temperature differences, localized overheating, and surface defects such as pitting, affecting product quality. The 45 grade mold uses oil heating, with deep holes drilled in the mold body for oil circulation heating. This provides better heating uniformity but is much more expensive, increasing the cost by about 30%-50% compared to QT500-7 material.

[0003] Therefore, there is an urgent need for a wet-process roof mold to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to propose a wet roofing mold that can reduce costs and achieve high heating uniformity.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A wet-process roof mold includes: an upper mold body, a lower mold body, and a plurality of stainless steel seamless pipes. The upper mold body and the lower mold body are both cast iron parts. Some of the stainless steel seamless pipes are embedded in the upper mold body, and another portion of the stainless steel seamless pipes are embedded in the lower mold body. Heating oil is introduced into the stainless steel seamless pipes so that the heat of the heating oil can be conducted to the working surfaces of the upper mold body and the lower mold body.

[0007] As a preferred technical solution for the aforementioned wet-process canopy mold, the stainless steel seamless steel pipe is S-shaped.

[0008] As a preferred technical solution of the above-mentioned wet-process canopy mold, the oil inlet and oil outlet of the stainless steel seamless steel pipe are connected in parallel.

[0009] As a preferred technical solution of the above-mentioned wet roof mold, both the back plate of the upper mold body and the back plate of the lower mold body are provided with a number of reinforcing ribs at intervals.

[0010] As a preferred technical solution of the above-mentioned wet roof mold, the reinforcing ribs are arranged in a grid pattern, and the back cavity of the upper mold body and the back cavity of the lower mold body are separated into square cavities not exceeding 300mm×300mm.

[0011] As a preferred technical solution of the above-mentioned wet-process roof mold, the thickness of the reinforcing rib is 25mm to 35mm.

[0012] As a preferred technical solution of the above-mentioned wet roof mold, both the back plate of the upper mold body and the back plate of the lower mold body are provided with clamping grooves, which can be matched with the press.

[0013] As a preferred technical solution of the above-mentioned wet roof mold, the thickness of the clamping groove wall is 30mm to 40mm.

[0014] As a preferred technical solution of the above-mentioned wet roof mold, the upper mold body and the lower mold body are made of QT500-7 material.

[0015] As a preferred technical solution for the aforementioned wet-process roof mold, the stainless steel seamless pipe is of type 304 or 316L.

[0016] The beneficial effects of this utility model are:

[0017] This utility model provides a wet-process roofing mold. The wet-process roofing mold includes an upper mold body, a lower mold body, and several seamless stainless steel pipes. Both the upper and lower mold bodies are integrally cast from cast iron. Some of the seamless stainless steel pipes are embedded in the upper mold body, and others are embedded in the lower mold body. Heating oil is circulated through the seamless stainless steel pipes to conduct heat to the working surfaces of both the upper and lower mold bodies. Compared to existing technologies, this wet-process roofing mold uses cast iron and eliminates the need for a traditional mold base plate, reducing costs. The embedded seamless stainless steel pipes have good compatibility with cast iron and excellent thermal conductivity. The use of heating oil improves heating uniformity, avoids excessive temperature differences, prevents localized overheating that could cause pitting on the product surface, and improves product quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0019] Fig. 1This is a structural schematic diagram of the wet canopy mold provided in this embodiment of the utility model;

[0020] Fig. 2 This is a schematic diagram of the first structure of the upper mold body provided in this embodiment of the utility model;

[0021] Fig. 3 This is a schematic diagram of the second structure of the upper mold body provided in this embodiment of the utility model;

[0022] Fig. 4 This is a structural schematic diagram of the stainless steel seamless pipe provided in this embodiment of the utility model.

[0023] In the picture:

[0024] 1. Upper mold body; 11. Main body; 12. Upper guide base; 2. Lower mold body; 3. Stainless steel seamless pipe; 4. Reinforcing rib; 5. Square cavity; 6. Mold clamping groove; 7. Flange edge. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] like Figs. 1 to 4 As shown, this utility model provides a wet-process roof mold. The wet-process roof mold includes: an upper mold body 1, a lower mold body 2, and several stainless steel seamless pipes 3. Specifically, both the upper mold body 1 and the lower mold body 2 are integrally cast from cast iron. Some of the stainless steel seamless pipes 3 are embedded in the upper mold body 1, and the other part of the stainless steel seamless pipes 3 are embedded in the lower mold body 2. Heating oil is introduced into the stainless steel seamless pipes 3 so that the heat of the heating oil can be conducted to the working surfaces of the upper mold body 1 and the lower mold body 2. Compared with the prior art, this wet-process roof mold uses cast iron material and eliminates the traditional mold base plate, reducing costs. The pre-embedded stainless steel seamless pipes 3 have good compatibility with cast iron and good thermal conductivity. The heating method using heating oil can improve the heating uniformity, avoid excessive temperature difference, prevent localized temperature surges that may cause pitting on the product surface, and improve product quality.

[0030] Optionally, the stainless steel seamless pipe 3 is S-shaped; further, the oil inlet and outlet ends of the stainless steel seamless pipe 3 are connected in parallel. Specifically, both the upper mold body 1 and the lower mold body 2 are provided with at least two stainless steel seamless pipes 3. The two S-shaped stainless steel seamless pipes 3 are arranged to overlap each other and cover the working surfaces of the upper mold body 1 and the lower mold body 2. Heating oil is introduced into the stainless steel seamless pipes 3, and the flow direction of the heating oil in two adjacent stainless steel seamless pipes 3 is opposite. This alternating heat exchange method makes the heating uniform and controllable, reduces regional temperature differences, and improves heating efficiency and molding quality. Furthermore, in this embodiment, both the upper mold body 1 and the lower mold body 2 are provided with two stainless steel seamless pipes 3. The oil passages of the two stainless steel seamless pipes 3 are arranged in a cross-flow pattern of two inlets and two outlets, which can improve heating efficiency and reduce regional temperature differences.

[0031] Optionally, the wall thickness of the stainless steel seamless steel pipe 3 is greater than 3mm, and the distance between the stainless steel seamless steel pipe 3 and the cavity of the upper mold body 1 and the cavity of the lower mold body 2 is greater than 15mm and less than 30mm, which can avoid the heating being too slow. The upper mold body 1 and the lower mold body 2 are heated by the heating oil in the stainless steel seamless steel pipe 3, so that the upper mold body 1 and the lower mold body 2 are heated evenly and controllably.

[0032] Optionally, both the back plate of the upper mold body 1 and the back plate of the lower mold body 2 are provided with a number of reinforcing ribs 4 at intervals. Specifically, the bottom sides of the reinforcing ribs 4 in the back cavity of the upper mold body 1 and the back cavity of the lower mold body 2 are provided with flange edges 7 with a width of 10mm-20mm, which can increase the torsional rigidity of the upper mold body 1 and the lower mold body 2 and improve the stability of the upper mold body 1 and the lower mold body 2.

[0033] Furthermore, the reinforcing ribs 4 are arranged in a grid pattern, dividing the back cavity of the upper mold body 1 and the back cavity of the lower mold body 2 into square cavities 5 not exceeding 300mm × 300mm; the thickness of the reinforcing ribs 4 is 25mm to 35mm. Specifically, the arrangement of the reinforcing ribs 4 in the back cavities of the upper mold body 1 and the lower mold body 2 is in principle such that the size of each square cavity 5 is within 300mm × 300mm, the thickness of the reinforcing ribs 4 is between 25mm and 35mm, and 20mm thick flange edges 7 are provided on both sides of the bottom of the reinforcing ribs 4 to increase strength and increase the torsional resistance of the upper mold body 1 and the lower mold body 2; according to the corresponding position of the press mold release slide rail spacing, the flange edges 7 are widened to 100mm-200mm to replace the bottom plate, eliminating the traditional mold body bottom plate and further reducing mold costs.

[0034] Optionally, both the back plate of the upper mold body 1 and the back plate of the lower mold body 2 are provided with clamping grooves 6. The clamping grooves 6 can be matched with the press, making it easy to adapt to the press. The clamping grooves 6 are cast together with the upper mold body 1 and the lower mold body 2, which can reduce the amount of machining. Further, the thickness of the groove wall of the clamping groove 6 is 30mm to 40mm.

[0035] Optionally, the upper mold body 1 includes an upper main body 11 and an upper guide base 12, and the lower mold body 2 includes a lower main body 11 and a lower guide base. The upper main body 11 and the upper guide base 12 are cast together and then milled into standard parts. The lower main body 11 and the lower guide base are cast together and then milled into standard parts. This can improve the integrity of the upper mold body 1 and the lower mold body 2 and improve the machining accuracy of the mold body and the lower mold body 2.

[0036] Optionally, in this embodiment, the upper mold body 1 and the lower mold body 2 are made of QT500-7 material. The stainless steel seamless pipe 3 is made of 304 or 316L. It should be noted that the 304 or 316L stainless steel seamless pipe 3 has the strongest versatility. Although its continuous operating temperature is ≤870℃, which is much lower than the casting temperature of QT500-7 ductile iron, the solidification speed of the cast iron is fast (30%-50% faster than cast steel). The stainless steel seamless pipe 3 is only briefly exposed to high temperature for 10-30 seconds, and the temperature drops rapidly after being encased by the cast iron. The pipe body of the stainless steel seamless pipe 3 will not melt or be severely deformed, fully meeting the usage requirements. The use of 304 or 316L stainless steel seamless pipe 3 has good compatibility with QT500-7 ductile iron, with the following specific advantages: 1. No intermetallic compounds are generated, which will not cause the cast iron parts to become brittle. 2. High mechanical strength: strong resistance to impact from molten cast iron, not easily broken during pre-embedding; 3. Convenient subsequent processing: can be directly welded to external water cooling pipelines (304 uses austenitic welding wire, 316L uses corrosion-resistant welding wire); 4. Similar coefficients of thermal expansion: since the temperature of the top mold is generally within 130-150℃, the joint between the casting and the steel pipe is not easy to crack; at the same time, the casting temperature of QT500-7 ductile iron casting needs to be controlled within the range of 1300-1400℃. When the wall thickness of the upper mold body 1 and the wall thickness of the lower mold body 2 are both greater than 50mm, the slow cooling process can reduce the thermal expansion difference between the stainless steel seamless steel pipe 3 and the cast iron, and prevent gaps from appearing at the joint.

[0037] Of course, in some other embodiments, the embedded stainless steel seamless pipe 3 can be of type 310S. The continuous operating temperature of 310S stainless steel seamless pipe 3 is ≤1200℃, and its resistance to high temperature oxidation and creep is better than that of 304 or 316L. It is suitable for QT500-7 ductile iron thick-walled parts (wall thickness ≥100mm) or casting temperature conditions that are relatively high (≥1380℃). This can prevent the pipe body of stainless steel seamless pipe 3 from local deformation due to long-term high temperature contact.

[0038] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A wet-process roofing mold, characterized in that, include: The upper mold body (1), the lower mold body (2), and several stainless steel seamless steel pipes (3) are provided. The upper mold body (1) and the lower mold body (2) are both cast iron parts. Some of the stainless steel seamless steel pipes (3) are embedded in the upper mold body (1), and the other part of the stainless steel seamless steel pipes (3) are embedded in the lower mold body (2). Heating oil is introduced into the stainless steel seamless steel pipes (3) so that the heat of the heating oil can be conducted to the working surface of the upper mold body (1) and the working surface of the lower mold body (2).

2. The wet-process canopy mold according to claim 1, characterized in that, The stainless steel seamless pipe (3) is S-shaped.

3. The wet-process canopy mold according to claim 1, characterized in that, The oil inlet and oil outlet of the stainless steel seamless pipe (3) are connected in parallel.

4. A wet-process roof mold according to claim 1, characterized in that, Both the back plate of the upper mold body (1) and the back plate of the lower mold body (2) are provided with a number of reinforcing ribs (4) at intervals.

5. A wet-process roof mold according to claim 4, characterized in that, The reinforcing ribs (4) are arranged in a grid pattern and divide the back cavity of the upper mold body (1) and the back cavity of the lower mold body (2) into square cavities (5) of no more than 300mm×300mm.

6. A wet-process roof mold according to claim 4, characterized in that, The thickness of the reinforcing rib (4) is 25mm to 35mm.

7. A wet-process canopy mold according to claim 1, characterized in that, The back plate of the upper mold body (1) and the back plate of the lower mold body (2) are both provided with clamping grooves (6), which can be matched with the press.

8. A wet-process roofing mold according to claim 7, characterized in that, The thickness of the groove wall of the clamping groove (6) is 30mm to 40mm.

9. A wet-process canopy mold according to any one of claims 1-8, characterized in that, The upper mold body (1) and the lower mold body (2) are made of QT500-7 material.

10. A wet-process roofing mold according to any one of claims 1-8, characterized in that, The stainless steel seamless pipe (3) is of model 304 or 316L.

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